drivers/char/istallion.c

   1 /*****************************************************************************/
   2
   3 /*
   4  *      istallion.c  -- stallion intelligent multiport serial driver.
   5  *
   6  *      Copyright (C) 1996-1999  Stallion Technologies (support@stallion.oz.au).
   7  *      Copyright (C) 1994-1996  Greg Ungerer.
   8  *
   9  *      This code is loosely based on the Linux serial driver, written by
  10  *      Linus Torvalds, Theodore T'so and others.
  11  *
  12  *      This program is free software; you can redistribute it and/or modify
  13  *      it under the terms of the GNU General Public License as published by
  14  *      the Free Software Foundation; either version 2 of the License, or
  15  *      (at your option) any later version.
  16  *
  17  *      This program is distributed in the hope that it will be useful,
  18  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *      GNU General Public License for more details.
  21  *
  22  *      You should have received a copy of the GNU General Public License
  23  *      along with this program; if not, write to the Free Software
  24  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 /*****************************************************************************/
  28
  29 #include <linux/config.h>
  30 #include <linux/module.h>
  31 #include <linux/malloc.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/tty_flip.h>
  34 #include <linux/serial.h>
  35 #include <linux/cdk.h>
  36 #include <linux/comstats.h>
  37 #include <linux/version.h>
  38 #include <linux/istallion.h>
  39 #include <linux/ioport.h>
  40 #include <linux/delay.h>
  41 #include <linux/init.h>
  42 #include <linux/devfs_fs_kernel.h>
  43
  44 #include <asm/io.h>
  45 #include <asm/uaccess.h>
  46
  47 #ifdef CONFIG_PCI
  48 #include <linux/pci.h>
  49 #endif
  50
  51 /*****************************************************************************/
  52
  53 /*
  54  *      Define different board types. Not all of the following board types
  55  *      are supported by this driver. But I will use the standard "assigned"
  56  *      board numbers. Currently supported boards are abbreviated as:
  57  *      ECP = EasyConnection 8/64, ONB = ONboard, BBY = Brumby and
  58  *      STAL = Stallion.
  59  */
  60 #define BRD_UNKNOWN     0
  61 #define BRD_STALLION    1
  62 #define BRD_BRUMBY4     2
  63 #define BRD_ONBOARD2    3
  64 #define BRD_ONBOARD     4
  65 #define BRD_BRUMBY8     5
  66 #define BRD_BRUMBY16    6
  67 #define BRD_ONBOARDE    7
  68 #define BRD_ONBOARD32   9
  69 #define BRD_ONBOARD2_32 10
  70 #define BRD_ONBOARDRS   11
  71 #define BRD_EASYIO      20
  72 #define BRD_ECH         21
  73 #define BRD_ECHMC       22
  74 #define BRD_ECP         23
  75 #define BRD_ECPE        24
  76 #define BRD_ECPMC       25
  77 #define BRD_ECHPCI      26
  78 #define BRD_ECH64PCI    27
  79 #define BRD_EASYIOPCI   28
  80 #define BRD_ECPPCI      29
  81
  82 #define BRD_BRUMBY      BRD_BRUMBY4
  83
  84 /*
  85  *      Define a configuration structure to hold the board configuration.
  86  *      Need to set this up in the code (for now) with the boards that are
  87  *      to be configured into the system. This is what needs to be modified
  88  *      when adding/removing/modifying boards. Each line entry in the
  89  *      stli_brdconf[] array is a board. Each line contains io/irq/memory
  90  *      ranges for that board (as well as what type of board it is).
  91  *      Some examples:
  92  *              { BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
  93  *      This line will configure an EasyConnection 8/64 at io address 2a0,
  94  *      and shared memory address of cc000. Multiple EasyConnection 8/64
  95  *      boards can share the same shared memory address space. No interrupt
  96  *      is required for this board type.
  97  *      Another example:
  98  *              { BRD_ECPE, 0x5000, 0, 0x80000000, 0, 0 },
  99  *      This line will configure an EasyConnection 8/64 EISA in slot 5 and
 100  *      shared memory address of 0x80000000 (2 GByte). Multiple
 101  *      EasyConnection 8/64 EISA boards can share the same shared memory
 102  *      address space. No interrupt is required for this board type.
 103  *      Another example:
 104  *              { BRD_ONBOARD, 0x240, 0, 0xd0000, 0, 0 },
 105  *      This line will configure an ONboard (ISA type) at io address 240,
 106  *      and shared memory address of d0000. Multiple ONboards can share
 107  *      the same shared memory address space. No interrupt required.
 108  *      Another example:
 109  *              { BRD_BRUMBY4, 0x360, 0, 0xc8000, 0, 0 },
 110  *      This line will configure a Brumby board (any number of ports!) at
 111  *      io address 360 and shared memory address of c8000. All Brumby boards
 112  *      configured into a system must have their own separate io and memory
 113  *      addresses. No interrupt is required.
 114  *      Another example:
 115  *              { BRD_STALLION, 0x330, 0, 0xd0000, 0, 0 },
 116  *      This line will configure an original Stallion board at io address 330
 117  *      and shared memory address d0000 (this would only be valid for a "V4.0"
 118  *      or Rev.O Stallion board). All Stallion boards configured into the
 119  *      system must have their own separate io and memory addresses. No
 120  *      interrupt is required.
 121  */
 122
 123 typedef struct {
 124         int             brdtype;
 125         int             ioaddr1;
 126         int             ioaddr2;
 127         unsigned long   memaddr;
 128         int             irq;
 129         int             irqtype;
 130 } stlconf_t;
 131
 132 static stlconf_t        stli_brdconf[] = {
 133         /*{ BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },*/
 134 };
 135
 136 static int      stli_nrbrds = sizeof(stli_brdconf) / sizeof(stlconf_t);
 137
 138 /*
 139  *      There is some experimental EISA board detection code in this driver.
 140  *      By default it is disabled, but for those that want to try it out,
 141  *      then set the define below to be 1.
 142  */
 143 #define STLI_EISAPROBE  0
 144
 145 static devfs_handle_t devfs_handle;
 146
 147 /*****************************************************************************/
 148
 149 /*
 150  *      Define some important driver characteristics. Device major numbers
 151  *      allocated as per Linux Device Registry.
 152  */
 153 #ifndef STL_SIOMEMMAJOR
 154 #define STL_SIOMEMMAJOR         28
 155 #endif
 156 #ifndef STL_SERIALMAJOR
 157 #define STL_SERIALMAJOR         24
 158 #endif
 159 #ifndef STL_CALLOUTMAJOR
 160 #define STL_CALLOUTMAJOR        25
 161 #endif
 162
 163 #define STL_DRVTYPSERIAL        1
 164 #define STL_DRVTYPCALLOUT       2
 165
 166 /*****************************************************************************/
 167
 168 /*
 169  *      Define our local driver identity first. Set up stuff to deal with
 170  *      all the local structures required by a serial tty driver.
 171  */
 172 static char     *stli_drvtitle = "Stallion Intelligent Multiport Serial Driver";
 173 static char     *stli_drvname = "istallion";
 174 static char     *stli_drvversion = "5.6.0";
 175 static char     *stli_serialname = "ttyE";
 176 static char     *stli_calloutname = "cue";
 177
 178 static struct tty_driver        stli_serial;
 179 static struct tty_driver        stli_callout;
 180 static struct tty_struct        *stli_ttys[STL_MAXDEVS];
 181 static struct termios           *stli_termios[STL_MAXDEVS];
 182 static struct termios           *stli_termioslocked[STL_MAXDEVS];
 183 static int                      stli_refcount;
 184
 185 /*
 186  *      We will need to allocate a temporary write buffer for chars that
 187  *      come direct from user space. The problem is that a copy from user
 188  *      space might cause a page fault (typically on a system that is
 189  *      swapping!). All ports will share one buffer - since if the system
 190  *      is already swapping a shared buffer won't make things any worse.
 191  */
 192 static char                     *stli_tmpwritebuf;
 193 static DECLARE_MUTEX(stli_tmpwritesem);
 194
 195 #define STLI_TXBUFSIZE          4096
 196
 197 /*
 198  *      Use a fast local buffer for cooked characters. Typically a whole
 199  *      bunch of cooked characters come in for a port, 1 at a time. So we
 200  *      save those up into a local buffer, then write out the whole lot
 201  *      with a large memcpy. Just use 1 buffer for all ports, since its
 202  *      use it is only need for short periods of time by each port.
 203  */
 204 static char                     *stli_txcookbuf;
 205 static int                      stli_txcooksize;
 206 static int                      stli_txcookrealsize;
 207 static struct tty_struct        *stli_txcooktty;
 208
 209 /*
 210  *      Define a local default termios struct. All ports will be created
 211  *      with this termios initially. Basically all it defines is a raw port
 212  *      at 9600 baud, 8 data bits, no parity, 1 stop bit.
 213  */
 214 static struct termios           stli_deftermios = {
 215         0,
 216         0,
 217         (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
 218         0,
 219         0,
 220         INIT_C_CC
 221 };
 222
 223 /*
 224  *      Define global stats structures. Not used often, and can be
 225  *      re-used for each stats call.
 226  */
 227 static comstats_t       stli_comstats;
 228 static combrd_t         stli_brdstats;
 229 static asystats_t       stli_cdkstats;
 230 static stlibrd_t        stli_dummybrd;
 231 static stliport_t       stli_dummyport;
 232
 233 /*****************************************************************************/
 234
 235 static stlibrd_t        *stli_brds[STL_MAXBRDS];
 236
 237 static int              stli_shared;
 238
 239 /*
 240  *      Per board state flags. Used with the state field of the board struct.
 241  *      Not really much here... All we need to do is keep track of whether
 242  *      the board has been detected, and whether it is actually running a slave
 243  *      or not.
 244  */
 245 #define BST_FOUND       0x1
 246 #define BST_STARTED     0x2
 247
 248 /*
 249  *      Define the set of port state flags. These are marked for internal
 250  *      state purposes only, usually to do with the state of communications
 251  *      with the slave. Most of them need to be updated atomically, so always
 252  *      use the bit setting operations (unless protected by cli/sti).
 253  */
 254 #define ST_INITIALIZING 1
 255 #define ST_OPENING      2
 256 #define ST_CLOSING      3
 257 #define ST_CMDING       4
 258 #define ST_TXBUSY       5
 259 #define ST_RXING        6
 260 #define ST_DOFLUSHRX    7
 261 #define ST_DOFLUSHTX    8
 262 #define ST_DOSIGS       9
 263 #define ST_RXSTOP       10
 264 #define ST_GETSIGS      11
 265
 266 /*
 267  *      Define an array of board names as printable strings. Handy for
 268  *      referencing boards when printing trace and stuff.
 269  */
 270 static char     *stli_brdnames[] = {
 271         "Unknown",
 272         "Stallion",
 273         "Brumby",
 274         "ONboard-MC",
 275         "ONboard",
 276         "Brumby",
 277         "Brumby",
 278         "ONboard-EI",
 279         (char *) NULL,
 280         "ONboard",
 281         "ONboard-MC",
 282         "ONboard-MC",
 283         (char *) NULL,
 284         (char *) NULL,
 285         (char *) NULL,
 286         (char *) NULL,
 287         (char *) NULL,
 288         (char *) NULL,
 289         (char *) NULL,
 290         (char *) NULL,
 291         "EasyIO",
 292         "EC8/32-AT",
 293         "EC8/32-MC",
 294         "EC8/64-AT",
 295         "EC8/64-EI",
 296         "EC8/64-MC",
 297         "EC8/32-PCI",
 298         "EC8/64-PCI",
 299         "EasyIO-PCI",
 300         "EC/RA-PCI",
 301 };
 302
 303 /*****************************************************************************/
 304
 305 #ifdef MODULE
 306 /*
 307  *      Define some string labels for arguments passed from the module
 308  *      load line. These allow for easy board definitions, and easy
 309  *      modification of the io, memory and irq resoucres.
 310  */
 311
 312 static char     *board0[8];
 313 static char     *board1[8];
 314 static char     *board2[8];
 315 static char     *board3[8];
 316
 317 static char     **stli_brdsp[] = {
 318         (char **) &board0,
 319         (char **) &board1,
 320         (char **) &board2,
 321         (char **) &board3
 322 };
 323
 324 /*
 325  *      Define a set of common board names, and types. This is used to
 326  *      parse any module arguments.
 327  */
 328
 329 typedef struct stlibrdtype {
 330         char    *name;
 331         int     type;
 332 } stlibrdtype_t;
 333
 334 static stlibrdtype_t    stli_brdstr[] = {
 335         { "stallion", BRD_STALLION },
 336         { "1", BRD_STALLION },
 337         { "brumby", BRD_BRUMBY },
 338         { "brumby4", BRD_BRUMBY },
 339         { "brumby/4", BRD_BRUMBY },
 340         { "brumby-4", BRD_BRUMBY },
 341         { "brumby8", BRD_BRUMBY },
 342         { "brumby/8", BRD_BRUMBY },
 343         { "brumby-8", BRD_BRUMBY },
 344         { "brumby16", BRD_BRUMBY },
 345         { "brumby/16", BRD_BRUMBY },
 346         { "brumby-16", BRD_BRUMBY },
 347         { "2", BRD_BRUMBY },
 348         { "onboard2", BRD_ONBOARD2 },
 349         { "onboard-2", BRD_ONBOARD2 },
 350         { "onboard/2", BRD_ONBOARD2 },
 351         { "onboard-mc", BRD_ONBOARD2 },
 352         { "onboard/mc", BRD_ONBOARD2 },
 353         { "onboard-mca", BRD_ONBOARD2 },
 354         { "onboard/mca", BRD_ONBOARD2 },
 355         { "3", BRD_ONBOARD2 },
 356         { "onboard", BRD_ONBOARD },
 357         { "onboardat", BRD_ONBOARD },
 358         { "4", BRD_ONBOARD },
 359         { "onboarde", BRD_ONBOARDE },
 360         { "onboard-e", BRD_ONBOARDE },
 361         { "onboard/e", BRD_ONBOARDE },
 362         { "onboard-ei", BRD_ONBOARDE },
 363         { "onboard/ei", BRD_ONBOARDE },
 364         { "7", BRD_ONBOARDE },
 365         { "ecp", BRD_ECP },
 366         { "ecpat", BRD_ECP },
 367         { "ec8/64", BRD_ECP },
 368         { "ec8/64-at", BRD_ECP },
 369         { "ec8/64-isa", BRD_ECP },
 370         { "23", BRD_ECP },
 371         { "ecpe", BRD_ECPE },
 372         { "ecpei", BRD_ECPE },
 373         { "ec8/64-e", BRD_ECPE },
 374         { "ec8/64-ei", BRD_ECPE },
 375         { "24", BRD_ECPE },
 376         { "ecpmc", BRD_ECPMC },
 377         { "ec8/64-mc", BRD_ECPMC },
 378         { "ec8/64-mca", BRD_ECPMC },
 379         { "25", BRD_ECPMC },
 380         { "ecppci", BRD_ECPPCI },
 381         { "ec/ra", BRD_ECPPCI },
 382         { "ec/ra-pc", BRD_ECPPCI },
 383         { "ec/ra-pci", BRD_ECPPCI },
 384         { "29", BRD_ECPPCI },
 385 };
 386
 387 /*
 388  *      Define the module agruments.
 389  */
 390 MODULE_AUTHOR("Greg Ungerer");
 391 MODULE_DESCRIPTION("Stallion Intelligent Multiport Serial Driver");
 392
 393 MODULE_PARM(board0, "1-3s");
 394 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,memaddr]");
 395 MODULE_PARM(board1, "1-3s");
 396 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,memaddr]");
 397 MODULE_PARM(board2, "1-3s");
 398 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,memaddr]");
 399 MODULE_PARM(board3, "1-3s");
 400 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,memaddr]");
 401
 402 #endif
 403
 404 /*
 405  *      Set up a default memory address table for EISA board probing.
 406  *      The default addresses are all bellow 1Mbyte, which has to be the
 407  *      case anyway. They should be safe, since we only read values from
 408  *      them, and interrupts are disabled while we do it. If the higher
 409  *      memory support is compiled in then we also try probing around
 410  *      the 1Gb, 2Gb and 3Gb areas as well...
 411  */
 412 static unsigned long    stli_eisamemprobeaddrs[] = {
 413         0xc0000,    0xd0000,    0xe0000,    0xf0000,
 414         0x80000000, 0x80010000, 0x80020000, 0x80030000,
 415         0x40000000, 0x40010000, 0x40020000, 0x40030000,
 416         0xc0000000, 0xc0010000, 0xc0020000, 0xc0030000,
 417         0xff000000, 0xff010000, 0xff020000, 0xff030000,
 418 };
 419
 420 static int      stli_eisamempsize = sizeof(stli_eisamemprobeaddrs) / sizeof(unsigned long);
 421 int             stli_eisaprobe = STLI_EISAPROBE;
 422
 423 /*
 424  *      Define the Stallion PCI vendor and device IDs.
 425  */
 426 #ifdef CONFIG_PCI
 427 #ifndef PCI_VENDOR_ID_STALLION
 428 #define PCI_VENDOR_ID_STALLION          0x124d
 429 #endif
 430 #ifndef PCI_DEVICE_ID_ECRA
 431 #define PCI_DEVICE_ID_ECRA              0x0004
 432 #endif
 433 #endif
 434
 435 /*****************************************************************************/
 436
 437 /*
 438  *      Hardware configuration info for ECP boards. These defines apply
 439  *      to the directly accessible io ports of the ECP. There is a set of
 440  *      defines for each ECP board type, ISA, EISA, MCA and PCI.
 441  */
 442 #define ECP_IOSIZE      4
 443
 444 #define ECP_MEMSIZE     (128 * 1024)
 445 #define ECP_PCIMEMSIZE  (256 * 1024)
 446
 447 #define ECP_ATPAGESIZE  (4 * 1024)
 448 #define ECP_MCPAGESIZE  (4 * 1024)
 449 #define ECP_EIPAGESIZE  (64 * 1024)
 450 #define ECP_PCIPAGESIZE (64 * 1024)
 451
 452 #define STL_EISAID      0x8c4e
 453
 454 /*
 455  *      Important defines for the ISA class of ECP board.
 456  */
 457 #define ECP_ATIREG      0
 458 #define ECP_ATCONFR     1
 459 #define ECP_ATMEMAR     2
 460 #define ECP_ATMEMPR     3
 461 #define ECP_ATSTOP      0x1
 462 #define ECP_ATINTENAB   0x10
 463 #define ECP_ATENABLE    0x20
 464 #define ECP_ATDISABLE   0x00
 465 #define ECP_ATADDRMASK  0x3f000
 466 #define ECP_ATADDRSHFT  12
 467
 468 /*
 469  *      Important defines for the EISA class of ECP board.
 470  */
 471 #define ECP_EIIREG      0
 472 #define ECP_EIMEMARL    1
 473 #define ECP_EICONFR     2
 474 #define ECP_EIMEMARH    3
 475 #define ECP_EIENABLE    0x1
 476 #define ECP_EIDISABLE   0x0
 477 #define ECP_EISTOP      0x4
 478 #define ECP_EIEDGE      0x00
 479 #define ECP_EILEVEL     0x80
 480 #define ECP_EIADDRMASKL 0x00ff0000
 481 #define ECP_EIADDRSHFTL 16
 482 #define ECP_EIADDRMASKH 0xff000000
 483 #define ECP_EIADDRSHFTH 24
 484 #define ECP_EIBRDENAB   0xc84
 485
 486 #define ECP_EISAID      0x4
 487
 488 /*
 489  *      Important defines for the Micro-channel class of ECP board.
 490  *      (It has a lot in common with the ISA boards.)
 491  */
 492 #define ECP_MCIREG      0
 493 #define ECP_MCCONFR     1
 494 #define ECP_MCSTOP      0x20
 495 #define ECP_MCENABLE    0x80
 496 #define ECP_MCDISABLE   0x00
 497
 498 /*
 499  *      Important defines for the PCI class of ECP board.
 500  *      (It has a lot in common with the other ECP boards.)
 501  */
 502 #define ECP_PCIIREG     0
 503 #define ECP_PCICONFR    1
 504 #define ECP_PCISTOP     0x01
 505
 506 /*
 507  *      Hardware configuration info for ONboard and Brumby boards. These
 508  *      defines apply to the directly accessible io ports of these boards.
 509  */
 510 #define ONB_IOSIZE      16
 511 #define ONB_MEMSIZE     (64 * 1024)
 512 #define ONB_ATPAGESIZE  (64 * 1024)
 513 #define ONB_MCPAGESIZE  (64 * 1024)
 514 #define ONB_EIMEMSIZE   (128 * 1024)
 515 #define ONB_EIPAGESIZE  (64 * 1024)
 516
 517 /*
 518  *      Important defines for the ISA class of ONboard board.
 519  */
 520 #define ONB_ATIREG      0
 521 #define ONB_ATMEMAR     1
 522 #define ONB_ATCONFR     2
 523 #define ONB_ATSTOP      0x4
 524 #define ONB_ATENABLE    0x01
 525 #define ONB_ATDISABLE   0x00
 526 #define ONB_ATADDRMASK  0xff0000
 527 #define ONB_ATADDRSHFT  16
 528
 529 #define ONB_MEMENABLO   0
 530 #define ONB_MEMENABHI   0x02
 531
 532 /*
 533  *      Important defines for the EISA class of ONboard board.
 534  */
 535 #define ONB_EIIREG      0
 536 #define ONB_EIMEMARL    1
 537 #define ONB_EICONFR     2
 538 #define ONB_EIMEMARH    3
 539 #define ONB_EIENABLE    0x1
 540 #define ONB_EIDISABLE   0x0
 541 #define ONB_EISTOP      0x4
 542 #define ONB_EIEDGE      0x00
 543 #define ONB_EILEVEL     0x80
 544 #define ONB_EIADDRMASKL 0x00ff0000
 545 #define ONB_EIADDRSHFTL 16
 546 #define ONB_EIADDRMASKH 0xff000000
 547 #define ONB_EIADDRSHFTH 24
 548 #define ONB_EIBRDENAB   0xc84
 549
 550 #define ONB_EISAID      0x1
 551
 552 /*
 553  *      Important defines for the Brumby boards. They are pretty simple,
 554  *      there is not much that is programmably configurable.
 555  */
 556 #define BBY_IOSIZE      16
 557 #define BBY_MEMSIZE     (64 * 1024)
 558 #define BBY_PAGESIZE    (16 * 1024)
 559
 560 #define BBY_ATIREG      0
 561 #define BBY_ATCONFR     1
 562 #define BBY_ATSTOP      0x4
 563
 564 /*
 565  *      Important defines for the Stallion boards. They are pretty simple,
 566  *      there is not much that is programmably configurable.
 567  */
 568 #define STAL_IOSIZE     16
 569 #define STAL_MEMSIZE    (64 * 1024)
 570 #define STAL_PAGESIZE   (64 * 1024)
 571
 572 /*
 573  *      Define the set of status register values for EasyConnection panels.
 574  *      The signature will return with the status value for each panel. From
 575  *      this we can determine what is attached to the board - before we have
 576  *      actually down loaded any code to it.
 577  */
 578 #define ECH_PNLSTATUS   2
 579 #define ECH_PNL16PORT   0x20
 580 #define ECH_PNLIDMASK   0x07
 581 #define ECH_PNLXPID     0x40
 582 #define ECH_PNLINTRPEND 0x80
 583
 584 /*
 585  *      Define some macros to do things to the board. Even those these boards
 586  *      are somewhat related there is often significantly different ways of
 587  *      doing some operation on it (like enable, paging, reset, etc). So each
 588  *      board class has a set of functions which do the commonly required
 589  *      operations. The macros below basically just call these functions,
 590  *      generally checking for a NULL function - which means that the board
 591  *      needs nothing done to it to achieve this operation!
 592  */
 593 #define EBRDINIT(brdp)                                          \
 594         if (brdp->init != NULL)                                 \
 595                 (* brdp->init)(brdp)
 596
 597 #define EBRDENABLE(brdp)                                        \
 598         if (brdp->enable != NULL)                               \
 599                 (* brdp->enable)(brdp);
 600
 601 #define EBRDDISABLE(brdp)                                       \
 602         if (brdp->disable != NULL)                              \
 603                 (* brdp->disable)(brdp);
 604
 605 #define EBRDINTR(brdp)                                          \
 606         if (brdp->intr != NULL)                                 \
 607                 (* brdp->intr)(brdp);
 608
 609 #define EBRDRESET(brdp)                                         \
 610         if (brdp->reset != NULL)                                \
 611                 (* brdp->reset)(brdp);
 612
 613 #define EBRDGETMEMPTR(brdp,offset)                              \
 614         (* brdp->getmemptr)(brdp, offset, __LINE__)
 615
 616 /*
 617  *      Define the maximal baud rate, and the default baud base for ports.
 618  */
 619 #define STL_MAXBAUD     460800
 620 #define STL_BAUDBASE    115200
 621 #define STL_CLOSEDELAY  (5 * HZ / 10)
 622
 623 /*****************************************************************************/
 624
 625 /*
 626  *      Define macros to extract a brd or port number from a minor number.
 627  */
 628 #define MINOR2BRD(min)          (((min) & 0xc0) >> 6)
 629 #define MINOR2PORT(min)         ((min) & 0x3f)
 630
 631 /*
 632  *      Define a baud rate table that converts termios baud rate selector
 633  *      into the actual baud rate value. All baud rate calculations are based
 634  *      on the actual baud rate required.
 635  */
 636 static unsigned int     stli_baudrates[] = {
 637         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
 638         9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
 639 };
 640
 641 /*****************************************************************************/
 642
 643 /*
 644  *      Define some handy local macros...
 645  */
 646 #undef MIN
 647 #define MIN(a,b)        (((a) <= (b)) ? (a) : (b))
 648
 649 #undef  TOLOWER
 650 #define TOLOWER(x)      ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
 651
 652 /*****************************************************************************/
 653
 654 /*
 655  *      Prototype all functions in this driver!
 656  */
 657
 658 #ifdef MODULE
 659 int             init_module(void);
 660 void            cleanup_module(void);
 661 static void     stli_argbrds(void);
 662 static int      stli_parsebrd(stlconf_t *confp, char **argp);
 663
 664 static unsigned long    stli_atol(char *str);
 665 #endif
 666
 667 int             stli_init(void);
 668 static int      stli_open(struct tty_struct *tty, struct file *filp);
 669 static void     stli_close(struct tty_struct *tty, struct file *filp);
 670 static int      stli_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count);
 671 static void     stli_putchar(struct tty_struct *tty, unsigned char ch);
 672 static void     stli_flushchars(struct tty_struct *tty);
 673 static int      stli_writeroom(struct tty_struct *tty);
 674 static int      stli_charsinbuffer(struct tty_struct *tty);
 675 static int      stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
 676 static void     stli_settermios(struct tty_struct *tty, struct termios *old);
 677 static void     stli_throttle(struct tty_struct *tty);
 678 static void     stli_unthrottle(struct tty_struct *tty);
 679 static void     stli_stop(struct tty_struct *tty);
 680 static void     stli_start(struct tty_struct *tty);
 681 static void     stli_flushbuffer(struct tty_struct *tty);
 682 static void     stli_breakctl(struct tty_struct *tty, int state);
 683 static void     stli_waituntilsent(struct tty_struct *tty, int timeout);
 684 static void     stli_sendxchar(struct tty_struct *tty, char ch);
 685 static void     stli_hangup(struct tty_struct *tty);
 686 static int      stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos);
 687
 688 static int      stli_brdinit(stlibrd_t *brdp);
 689 static int      stli_startbrd(stlibrd_t *brdp);
 690 static ssize_t  stli_memread(struct file *fp, char *buf, size_t count, loff_t *offp);
 691 static ssize_t  stli_memwrite(struct file *fp, const char *buf, size_t count, loff_t *offp);
 692 static int      stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
 693 static void     stli_brdpoll(stlibrd_t *brdp, volatile cdkhdr_t *hdrp);
 694 static void     stli_poll(unsigned long arg);
 695 static int      stli_hostcmd(stlibrd_t *brdp, stliport_t *portp);
 696 static int      stli_initopen(stlibrd_t *brdp, stliport_t *portp);
 697 static int      stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
 698 static int      stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
 699 static int      stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp);
 700 static void     stli_dohangup(void *arg);
 701 static void     stli_delay(int len);
 702 static int      stli_setport(stliport_t *portp);
 703 static int      stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
 704 static void     stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
 705 static void     stli_dodelaycmd(stliport_t *portp, volatile cdkctrl_t *cp);
 706 static void     stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp);
 707 static void     stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
 708 static long     stli_mktiocm(unsigned long sigvalue);
 709 static void     stli_read(stlibrd_t *brdp, stliport_t *portp);
 710 static void     stli_getserial(stliport_t *portp, struct serial_struct *sp);
 711 static int      stli_setserial(stliport_t *portp, struct serial_struct *sp);
 712 static int      stli_getbrdstats(combrd_t *bp);
 713 static int      stli_getportstats(stliport_t *portp, comstats_t *cp);
 714 static int      stli_portcmdstats(stliport_t *portp);
 715 static int      stli_clrportstats(stliport_t *portp, comstats_t *cp);
 716 static int      stli_getportstruct(unsigned long arg);
 717 static int      stli_getbrdstruct(unsigned long arg);
 718 static void     *stli_memalloc(int len);
 719 static stlibrd_t *stli_allocbrd(void);
 720
 721 static void     stli_ecpinit(stlibrd_t *brdp);
 722 static void     stli_ecpenable(stlibrd_t *brdp);
 723 static void     stli_ecpdisable(stlibrd_t *brdp);
 724 static char     *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 725 static void     stli_ecpreset(stlibrd_t *brdp);
 726 static void     stli_ecpintr(stlibrd_t *brdp);
 727 static void     stli_ecpeiinit(stlibrd_t *brdp);
 728 static void     stli_ecpeienable(stlibrd_t *brdp);
 729 static void     stli_ecpeidisable(stlibrd_t *brdp);
 730 static char     *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 731 static void     stli_ecpeireset(stlibrd_t *brdp);
 732 static void     stli_ecpmcenable(stlibrd_t *brdp);
 733 static void     stli_ecpmcdisable(stlibrd_t *brdp);
 734 static char     *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 735 static void     stli_ecpmcreset(stlibrd_t *brdp);
 736 static void     stli_ecppciinit(stlibrd_t *brdp);
 737 static char     *stli_ecppcigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 738 static void     stli_ecppcireset(stlibrd_t *brdp);
 739
 740 static void     stli_onbinit(stlibrd_t *brdp);
 741 static void     stli_onbenable(stlibrd_t *brdp);
 742 static void     stli_onbdisable(stlibrd_t *brdp);
 743 static char     *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 744 static void     stli_onbreset(stlibrd_t *brdp);
 745 static void     stli_onbeinit(stlibrd_t *brdp);
 746 static void     stli_onbeenable(stlibrd_t *brdp);
 747 static void     stli_onbedisable(stlibrd_t *brdp);
 748 static char     *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 749 static void     stli_onbereset(stlibrd_t *brdp);
 750 static void     stli_bbyinit(stlibrd_t *brdp);
 751 static char     *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 752 static void     stli_bbyreset(stlibrd_t *brdp);
 753 static void     stli_stalinit(stlibrd_t *brdp);
 754 static char     *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 755 static void     stli_stalreset(stlibrd_t *brdp);
 756
 757 static stliport_t *stli_getport(int brdnr, int panelnr, int portnr);
 758
 759 static inline int       stli_initbrds(void);
 760 static inline int       stli_initecp(stlibrd_t *brdp);
 761 static inline int       stli_initonb(stlibrd_t *brdp);
 762 static inline int       stli_findeisabrds(void);
 763 static inline int       stli_eisamemprobe(stlibrd_t *brdp);
 764 static inline int       stli_initports(stlibrd_t *brdp);
 765 static inline int       stli_getbrdnr(void);
 766
 767 #ifdef  CONFIG_PCI
 768 static inline int       stli_findpcibrds(void);
 769 static inline int       stli_initpcibrd(int brdtype, struct pci_dev *devp);
 770 #endif
 771
 772 /*****************************************************************************/
 773
 774 /*
 775  *      Define the driver info for a user level shared memory device. This
 776  *      device will work sort of like the /dev/kmem device - except that it
 777  *      will give access to the shared memory on the Stallion intelligent
 778  *      board. This is also a very useful debugging tool.
 779  */
 780 static struct file_operations   stli_fsiomem = {
 781         owner:          THIS_MODULE,
 782         read:           stli_memread,
 783         write:          stli_memwrite,
 784         ioctl:          stli_memioctl,
 785 };
 786
 787 /*****************************************************************************/
 788
 789 /*
 790  *      Define a timer_list entry for our poll routine. The slave board
 791  *      is polled every so often to see if anything needs doing. This is
 792  *      much cheaper on host cpu than using interrupts. It turns out to
 793  *      not increase character latency by much either...
 794  */
 795 static struct timer_list        stli_timerlist = {
 796         function: stli_poll
 797 };
 798
 799 static int      stli_timeron;
 800
 801 /*
 802  *      Define the calculation for the timeout routine.
 803  */
 804 #define STLI_TIMEOUT    (jiffies + 1)
 805
 806 /*****************************************************************************/
 807
 808 #ifdef MODULE
 809
 810 /*
 811  *      Loadable module initialization stuff.
 812  */
 813
 814 int init_module()
 815 {
 816         unsigned long   flags;
 817
 818 #if DEBUG
 819         printk("init_module()\n");
 820 #endif
 821
 822         save_flags(flags);
 823         cli();
 824         stli_init();
 825         restore_flags(flags);
 826
 827         return(0);
 828 }
 829
 830 /*****************************************************************************/
 831
 832 void cleanup_module()
 833 {
 834         stlibrd_t       *brdp;
 835         stliport_t      *portp;
 836         unsigned long   flags;
 837         int             i, j;
 838
 839 #if DEBUG
 840         printk("cleanup_module()\n");
 841 #endif
 842
 843         printk(KERN_INFO "Unloading %s: version %s\n", stli_drvtitle,
 844                 stli_drvversion);
 845
 846         save_flags(flags);
 847         cli();
 848
 849 /*
 850  *      Free up all allocated resources used by the ports. This includes
 851  *      memory and interrupts.
 852  */
 853         if (stli_timeron) {
 854                 stli_timeron = 0;
 855                 del_timer(&stli_timerlist);
 856         }
 857
 858         i = tty_unregister_driver(&stli_serial);
 859         j = tty_unregister_driver(&stli_callout);
 860         if (i || j) {
 861                 printk("STALLION: failed to un-register tty driver, "
 862                         "errno=%d,%d\n", -i, -j);
 863                 restore_flags(flags);
 864                 return;
 865         }
 866         devfs_unregister (devfs_handle);
 867         if ((i = devfs_unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
 868                 printk("STALLION: failed to un-register serial memory device, "
 869                         "errno=%d\n", -i);
 870         if (stli_tmpwritebuf != (char *) NULL)
 871                 kfree(stli_tmpwritebuf);
 872         if (stli_txcookbuf != (char *) NULL)
 873                 kfree(stli_txcookbuf);
 874
 875         for (i = 0; (i < stli_nrbrds); i++) {
 876                 if ((brdp = stli_brds[i]) == (stlibrd_t *) NULL)
 877                         continue;
 878                 for (j = 0; (j < STL_MAXPORTS); j++) {
 879                         portp = brdp->ports[j];
 880                         if (portp != (stliport_t *) NULL) {
 881                                 if (portp->tty != (struct tty_struct *) NULL)
 882                                         tty_hangup(portp->tty);
 883                                 kfree(portp);
 884                         }
 885                 }
 886
 887                 iounmap(brdp->membase);
 888                 if (brdp->iosize > 0)
 889                         release_region(brdp->iobase, brdp->iosize);
 890                 kfree(brdp);
 891                 stli_brds[i] = (stlibrd_t *) NULL;
 892         }
 893
 894         restore_flags(flags);
 895 }
 896
 897 /*****************************************************************************/
 898
 899 /*
 900  *      Check for any arguments passed in on the module load command line.
 901  */
 902
 903 static void stli_argbrds()
 904 {
 905         stlconf_t       conf;
 906         stlibrd_t       *brdp;
 907         int             nrargs, i;
 908
 909 #if DEBUG
 910         printk("stli_argbrds()\n");
 911 #endif
 912
 913         nrargs = sizeof(stli_brdsp) / sizeof(char **);
 914
 915         for (i = stli_nrbrds; (i < nrargs); i++) {
 916                 memset(&conf, 0, sizeof(conf));
 917                 if (stli_parsebrd(&conf, stli_brdsp[i]) == 0)
 918                         continue;
 919                 if ((brdp = stli_allocbrd()) == (stlibrd_t *) NULL)
 920                         continue;
 921                 stli_nrbrds = i + 1;
 922                 brdp->brdnr = i;
 923                 brdp->brdtype = conf.brdtype;
 924                 brdp->iobase = conf.ioaddr1;
 925                 brdp->memaddr = conf.memaddr;
 926                 stli_brdinit(brdp);
 927         }
 928 }
 929
 930 /*****************************************************************************/
 931
 932 /*
 933  *      Convert an ascii string number into an unsigned long.
 934  */
 935
 936 static unsigned long stli_atol(char *str)
 937 {
 938         unsigned long   val;
 939         int             base, c;
 940         char            *sp;
 941
 942         val = 0;
 943         sp = str;
 944         if ((*sp == '0') && (*(sp+1) == 'x')) {
 945                 base = 16;
 946                 sp += 2;
 947         } else if (*sp == '0') {
 948                 base = 8;
 949                 sp++;
 950         } else {
 951                 base = 10;
 952         }
 953
 954         for (; (*sp != 0); sp++) {
 955                 c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
 956                 if ((c < 0) || (c >= base)) {
 957                         printk("STALLION: invalid argument %s\n", str);
 958                         val = 0;
 959                         break;
 960                 }
 961                 val = (val * base) + c;
 962         }
 963         return(val);
 964 }
 965
 966 /*****************************************************************************/
 967
 968 /*
 969  *      Parse the supplied argument string, into the board conf struct.
 970  */
 971
 972 static int stli_parsebrd(stlconf_t *confp, char **argp)
 973 {
 974         char    *sp;
 975         int     nrbrdnames, i;
 976
 977 #if DEBUG
 978         printk("stli_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp);
 979 #endif
 980
 981         if ((argp[0] == (char *) NULL) || (*argp[0] == 0))
 982                 return(0);
 983
 984         for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
 985                 *sp = TOLOWER(*sp);
 986
 987         nrbrdnames = sizeof(stli_brdstr) / sizeof(stlibrdtype_t);
 988         for (i = 0; (i < nrbrdnames); i++) {
 989                 if (strcmp(stli_brdstr[i].name, argp[0]) == 0)
 990                         break;
 991         }
 992         if (i >= nrbrdnames) {
 993                 printk("STALLION: unknown board name, %s?\n", argp[0]);
 994                 return(0);
 995         }
 996
 997         confp->brdtype = stli_brdstr[i].type;
 998         if ((argp[1] != (char *) NULL) && (*argp[1] != 0))
 999                 confp->ioaddr1 = stli_atol(argp[1]);
1000         if ((argp[2] != (char *) NULL) && (*argp[2] != 0))
1001                 confp->memaddr = stli_atol(argp[2]);
1002         return(1);
1003 }
1004
1005 #endif
1006
1007 /*****************************************************************************/
1008
1009 /*
1010  *      Local driver kernel malloc routine.
1011  */
1012
1013 static void *stli_memalloc(int len)
1014 {
1015         return((void *) kmalloc(len, GFP_KERNEL));
1016 }
1017
1018 /*****************************************************************************/
1019
1020 static int stli_open(struct tty_struct *tty, struct file *filp)
1021 {
1022         stlibrd_t       *brdp;
1023         stliport_t      *portp;
1024         unsigned int    minordev;
1025         int             brdnr, portnr, rc;
1026
1027 #if DEBUG
1028         printk("stli_open(tty=%x,filp=%x): device=%x\n", (int) tty,
1029                 (int) filp, tty->device);
1030 #endif
1031
1032         minordev = MINOR(tty->device);
1033         brdnr = MINOR2BRD(minordev);
1034         if (brdnr >= stli_nrbrds)
1035                 return(-ENODEV);
1036         brdp = stli_brds[brdnr];
1037         if (brdp == (stlibrd_t *) NULL)
1038                 return(-ENODEV);
1039         if ((brdp->state & BST_STARTED) == 0)
1040                 return(-ENODEV);
1041         portnr = MINOR2PORT(minordev);
1042         if ((portnr < 0) || (portnr > brdp->nrports))
1043                 return(-ENODEV);
1044
1045         portp = brdp->ports[portnr];
1046         if (portp == (stliport_t *) NULL)
1047                 return(-ENODEV);
1048         if (portp->devnr < 1)
1049                 return(-ENODEV);
1050
1051         MOD_INC_USE_COUNT;
1052
1053 /*
1054  *      Check if this port is in the middle of closing. If so then wait
1055  *      until it is closed then return error status based on flag settings.
1056  *      The sleep here does not need interrupt protection since the wakeup
1057  *      for it is done with the same context.
1058  */
1059         if (portp->flags & ASYNC_CLOSING) {
1060                 interruptible_sleep_on(&portp->close_wait);
1061                 if (portp->flags & ASYNC_HUP_NOTIFY)
1062                         return(-EAGAIN);
1063                 return(-ERESTARTSYS);
1064         }
1065
1066 /*
1067  *      On the first open of the device setup the port hardware, and
1068  *      initialize the per port data structure. Since initializing the port
1069  *      requires several commands to the board we will need to wait for any
1070  *      other open that is already initializing the port.
1071  */
1072         portp->tty = tty;
1073         tty->driver_data = portp;
1074         portp->refcount++;
1075
1076         while (test_bit(ST_INITIALIZING, &portp->state)) {
1077                 if (signal_pending(current))
1078                         return(-ERESTARTSYS);
1079                 interruptible_sleep_on(&portp->raw_wait);
1080         }
1081
1082         if ((portp->flags & ASYNC_INITIALIZED) == 0) {
1083                 set_bit(ST_INITIALIZING, &portp->state);
1084                 if ((rc = stli_initopen(brdp, portp)) >= 0) {
1085                         portp->flags |= ASYNC_INITIALIZED;
1086                         clear_bit(TTY_IO_ERROR, &tty->flags);
1087                 }
1088                 clear_bit(ST_INITIALIZING, &portp->state);
1089                 wake_up_interruptible(&portp->raw_wait);
1090                 if (rc < 0)
1091                         return(rc);
1092         }
1093
1094 /*
1095  *      Check if this port is in the middle of closing. If so then wait
1096  *      until it is closed then return error status, based on flag settings.
1097  *      The sleep here does not need interrupt protection since the wakeup
1098  *      for it is done with the same context.
1099  */
1100         if (portp->flags & ASYNC_CLOSING) {
1101                 interruptible_sleep_on(&portp->close_wait);
1102                 if (portp->flags & ASYNC_HUP_NOTIFY)
1103                         return(-EAGAIN);
1104                 return(-ERESTARTSYS);
1105         }
1106
1107 /*
1108  *      Based on type of open being done check if it can overlap with any
1109  *      previous opens still in effect. If we are a normal serial device
1110  *      then also we might have to wait for carrier.
1111  */
1112         if (tty->driver.subtype == STL_DRVTYPCALLOUT) {
1113                 if (portp->flags & ASYNC_NORMAL_ACTIVE)
1114                         return(-EBUSY);
1115                 if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
1116                         if ((portp->flags & ASYNC_SESSION_LOCKOUT) &&
1117                             (portp->session != current->session))
1118                                 return(-EBUSY);
1119                         if ((portp->flags & ASYNC_PGRP_LOCKOUT) &&
1120                             (portp->pgrp != current->pgrp))
1121                                 return(-EBUSY);
1122                 }
1123                 portp->flags |= ASYNC_CALLOUT_ACTIVE;
1124         } else {
1125                 if (filp->f_flags & O_NONBLOCK) {
1126                         if (portp->flags & ASYNC_CALLOUT_ACTIVE)
1127                                 return(-EBUSY);
1128                 } else {
1129                         if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
1130                                 return(rc);
1131                 }
1132                 portp->flags |= ASYNC_NORMAL_ACTIVE;
1133         }
1134
1135         if ((portp->refcount == 1) && (portp->flags & ASYNC_SPLIT_TERMIOS)) {
1136                 if (tty->driver.subtype == STL_DRVTYPSERIAL)
1137                         *tty->termios = portp->normaltermios;
1138                 else
1139                         *tty->termios = portp->callouttermios;
1140                 stli_setport(portp);
1141         }
1142
1143         portp->session = current->session;
1144         portp->pgrp = current->pgrp;
1145         return(0);
1146 }
1147
1148 /*****************************************************************************/
1149
1150 static void stli_close(struct tty_struct *tty, struct file *filp)
1151 {
1152         stlibrd_t       *brdp;
1153         stliport_t      *portp;
1154         unsigned long   flags;
1155
1156 #if DEBUG
1157         printk("stli_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
1158 #endif
1159
1160         portp = tty->driver_data;
1161         if (portp == (stliport_t *) NULL)
1162                 return;
1163
1164         save_flags(flags);
1165         cli();
1166         if (tty_hung_up_p(filp)) {
1167                 MOD_DEC_USE_COUNT;
1168                 restore_flags(flags);
1169                 return;
1170         }
1171         if ((tty->count == 1) && (portp->refcount != 1))
1172                 portp->refcount = 1;
1173         if (portp->refcount-- > 1) {
1174                 MOD_DEC_USE_COUNT;
1175                 restore_flags(flags);
1176                 return;
1177         }
1178
1179         portp->flags |= ASYNC_CLOSING;
1180
1181         if (portp->flags & ASYNC_NORMAL_ACTIVE)
1182                 portp->normaltermios = *tty->termios;
1183         if (portp->flags & ASYNC_CALLOUT_ACTIVE)
1184                 portp->callouttermios = *tty->termios;
1185
1186 /*
1187  *      May want to wait for data to drain before closing. The BUSY flag
1188  *      keeps track of whether we are still transmitting or not. It is
1189  *      updated by messages from the slave - indicating when all chars
1190  *      really have drained.
1191  */
1192         if (tty == stli_txcooktty)
1193                 stli_flushchars(tty);
1194         tty->closing = 1;
1195         if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1196                 tty_wait_until_sent(tty, portp->closing_wait);
1197
1198         portp->flags &= ~ASYNC_INITIALIZED;
1199         brdp = stli_brds[portp->brdnr];
1200         stli_rawclose(brdp, portp, 0, 0);
1201         if (tty->termios->c_cflag & HUPCL) {
1202                 stli_mkasysigs(&portp->asig, 0, 0);
1203                 if (test_bit(ST_CMDING, &portp->state))
1204                         set_bit(ST_DOSIGS, &portp->state);
1205                 else
1206                         stli_sendcmd(brdp, portp, A_SETSIGNALS, &portp->asig,
1207                                 sizeof(asysigs_t), 0);
1208         }
1209         clear_bit(ST_TXBUSY, &portp->state);
1210         clear_bit(ST_RXSTOP, &portp->state);
1211         set_bit(TTY_IO_ERROR, &tty->flags);
1212         if (tty->ldisc.flush_buffer)
1213                 (tty->ldisc.flush_buffer)(tty);
1214         set_bit(ST_DOFLUSHRX, &portp->state);
1215         stli_flushbuffer(tty);
1216
1217         tty->closing = 0;
1218         portp->tty = (struct tty_struct *) NULL;
1219
1220         if (portp->openwaitcnt) {
1221                 if (portp->close_delay)
1222                         stli_delay(portp->close_delay);
1223                 wake_up_interruptible(&portp->open_wait);
1224         }
1225
1226         portp->flags &= ~(ASYNC_CALLOUT_ACTIVE | ASYNC_NORMAL_ACTIVE |
1227                 ASYNC_CLOSING);
1228         wake_up_interruptible(&portp->close_wait);
1229         MOD_DEC_USE_COUNT;
1230         restore_flags(flags);
1231 }
1232
1233 /*****************************************************************************/
1234
1235 /*
1236  *      Carry out first open operations on a port. This involves a number of
1237  *      commands to be sent to the slave. We need to open the port, set the
1238  *      notification events, set the initial port settings, get and set the
1239  *      initial signal values. We sleep and wait in between each one. But
1240  *      this still all happens pretty quickly.
1241  */
1242
1243 static int stli_initopen(stlibrd_t *brdp, stliport_t *portp)
1244 {
1245         struct tty_struct       *tty;
1246         asynotify_t             nt;
1247         asyport_t               aport;
1248         int                     rc;
1249
1250 #if DEBUG
1251         printk("stli_initopen(brdp=%x,portp=%x)\n", (int) brdp, (int) portp);
1252 #endif
1253
1254         if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
1255                 return(rc);
1256
1257         memset(&nt, 0, sizeof(asynotify_t));
1258         nt.data = (DT_TXLOW | DT_TXEMPTY | DT_RXBUSY | DT_RXBREAK);
1259         nt.signal = SG_DCD;
1260         if ((rc = stli_cmdwait(brdp, portp, A_SETNOTIFY, &nt,
1261             sizeof(asynotify_t), 0)) < 0)
1262                 return(rc);
1263
1264         tty = portp->tty;
1265         if (tty == (struct tty_struct *) NULL)
1266                 return(-ENODEV);
1267         stli_mkasyport(portp, &aport, tty->termios);
1268         if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport,
1269             sizeof(asyport_t), 0)) < 0)
1270                 return(rc);
1271
1272         set_bit(ST_GETSIGS, &portp->state);
1273         if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig,
1274             sizeof(asysigs_t), 1)) < 0)
1275                 return(rc);
1276         if (test_and_clear_bit(ST_GETSIGS, &portp->state))
1277                 portp->sigs = stli_mktiocm(portp->asig.sigvalue);
1278         stli_mkasysigs(&portp->asig, 1, 1);
1279         if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
1280             sizeof(asysigs_t), 0)) < 0)
1281                 return(rc);
1282
1283         return(0);
1284 }
1285
1286 /*****************************************************************************/
1287
1288 /*
1289  *      Send an open message to the slave. This will sleep waiting for the
1290  *      acknowledgement, so must have user context. We need to co-ordinate
1291  *      with close events here, since we don't want open and close events
1292  *      to overlap.
1293  */
1294
1295 static int stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
1296 {
1297         volatile cdkhdr_t       *hdrp;
1298         volatile cdkctrl_t      *cp;
1299         volatile unsigned char  *bits;
1300         unsigned long           flags;
1301         int                     rc;
1302
1303 #if DEBUG
1304         printk("stli_rawopen(brdp=%x,portp=%x,arg=%x,wait=%d)\n",
1305                 (int) brdp, (int) portp, (int) arg, wait);
1306 #endif
1307
1308 /*
1309  *      Send a message to the slave to open this port.
1310  */
1311         save_flags(flags);
1312         cli();
1313
1314 /*
1315  *      Slave is already closing this port. This can happen if a hangup
1316  *      occurs on this port. So we must wait until it is complete. The
1317  *      order of opens and closes may not be preserved across shared
1318  *      memory, so we must wait until it is complete.
1319  */
1320         while (test_bit(ST_CLOSING, &portp->state)) {
1321                 if (signal_pending(current)) {
1322                         restore_flags(flags);
1323                         return(-ERESTARTSYS);
1324                 }
1325                 interruptible_sleep_on(&portp->raw_wait);
1326         }
1327
1328 /*
1329  *      Everything is ready now, so write the open message into shared
1330  *      memory. Once the message is in set the service bits to say that
1331  *      this port wants service.
1332  */
1333         EBRDENABLE(brdp);
1334         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1335         cp->openarg = arg;
1336         cp->open = 1;
1337         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1338         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
1339                 portp->portidx;
1340         *bits |= portp->portbit;
1341         EBRDDISABLE(brdp);
1342
1343         if (wait == 0) {
1344                 restore_flags(flags);
1345                 return(0);
1346         }
1347
1348 /*
1349  *      Slave is in action, so now we must wait for the open acknowledgment
1350  *      to come back.
1351  */
1352         rc = 0;
1353         set_bit(ST_OPENING, &portp->state);
1354         while (test_bit(ST_OPENING, &portp->state)) {
1355                 if (signal_pending(current)) {
1356                         rc = -ERESTARTSYS;
1357                         break;
1358                 }
1359                 interruptible_sleep_on(&portp->raw_wait);
1360         }
1361         restore_flags(flags);
1362
1363         if ((rc == 0) && (portp->rc != 0))
1364                 rc = -EIO;
1365         return(rc);
1366 }
1367
1368 /*****************************************************************************/
1369
1370 /*
1371  *      Send a close message to the slave. Normally this will sleep waiting
1372  *      for the acknowledgement, but if wait parameter is 0 it will not. If
1373  *      wait is true then must have user context (to sleep).
1374  */
1375
1376 static int stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
1377 {
1378         volatile cdkhdr_t       *hdrp;
1379         volatile cdkctrl_t      *cp;
1380         volatile unsigned char  *bits;
1381         unsigned long           flags;
1382         int                     rc;
1383
1384 #if DEBUG
1385         printk("stli_rawclose(brdp=%x,portp=%x,arg=%x,wait=%d)\n",
1386                 (int) brdp, (int) portp, (int) arg, wait);
1387 #endif
1388
1389         save_flags(flags);
1390         cli();
1391
1392 /*
1393  *      Slave is already closing this port. This can happen if a hangup
1394  *      occurs on this port.
1395  */
1396         if (wait) {
1397                 while (test_bit(ST_CLOSING, &portp->state)) {
1398                         if (signal_pending(current)) {
1399                                 restore_flags(flags);
1400                                 return(-ERESTARTSYS);
1401                         }
1402                         interruptible_sleep_on(&portp->raw_wait);
1403                 }
1404         }
1405
1406 /*
1407  *      Write the close command into shared memory.
1408  */
1409         EBRDENABLE(brdp);
1410         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1411         cp->closearg = arg;
1412         cp->close = 1;
1413         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1414         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
1415                 portp->portidx;
1416         *bits |= portp->portbit;
1417         EBRDDISABLE(brdp);
1418
1419         set_bit(ST_CLOSING, &portp->state);
1420         if (wait == 0) {
1421                 restore_flags(flags);
1422                 return(0);
1423         }
1424
1425 /*
1426  *      Slave is in action, so now we must wait for the open acknowledgment
1427  *      to come back.
1428  */
1429         rc = 0;
1430         while (test_bit(ST_CLOSING, &portp->state)) {
1431                 if (signal_pending(current)) {
1432                         rc = -ERESTARTSYS;
1433                         break;
1434                 }
1435                 interruptible_sleep_on(&portp->raw_wait);
1436         }
1437         restore_flags(flags);
1438
1439         if ((rc == 0) && (portp->rc != 0))
1440                 rc = -EIO;
1441         return(rc);
1442 }
1443
1444 /*****************************************************************************/
1445
1446 /*
1447  *      Send a command to the slave and wait for the response. This must
1448  *      have user context (it sleeps). This routine is generic in that it
1449  *      can send any type of command. Its purpose is to wait for that command
1450  *      to complete (as opposed to initiating the command then returning).
1451  */
1452
1453 static int stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
1454 {
1455         unsigned long   flags;
1456
1457 #if DEBUG
1458         printk("stli_cmdwait(brdp=%x,portp=%x,cmd=%x,arg=%x,size=%d,"
1459                 "copyback=%d)\n", (int) brdp, (int) portp, (int) cmd,
1460                 (int) arg, size, copyback);
1461 #endif
1462
1463         save_flags(flags);
1464         cli();
1465         while (test_bit(ST_CMDING, &portp->state)) {
1466                 if (signal_pending(current)) {
1467                         restore_flags(flags);
1468                         return(-ERESTARTSYS);
1469                 }
1470                 interruptible_sleep_on(&portp->raw_wait);
1471         }
1472
1473         stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
1474
1475         while (test_bit(ST_CMDING, &portp->state)) {
1476                 if (signal_pending(current)) {
1477                         restore_flags(flags);
1478                         return(-ERESTARTSYS);
1479                 }
1480                 interruptible_sleep_on(&portp->raw_wait);
1481         }
1482         restore_flags(flags);
1483
1484         if (portp->rc != 0)
1485                 return(-EIO);
1486         return(0);
1487 }
1488
1489 /*****************************************************************************/
1490
1491 /*
1492  *      Send the termios settings for this port to the slave. This sleeps
1493  *      waiting for the command to complete - so must have user context.
1494  */
1495
1496 static int stli_setport(stliport_t *portp)
1497 {
1498         stlibrd_t       *brdp;
1499         asyport_t       aport;
1500
1501 #if DEBUG
1502         printk("stli_setport(portp=%x)\n", (int) portp);
1503 #endif
1504
1505         if (portp == (stliport_t *) NULL)
1506                 return(-ENODEV);
1507         if (portp->tty == (struct tty_struct *) NULL)
1508                 return(-ENODEV);
1509         if ((portp->brdnr < 0) && (portp->brdnr >= stli_nrbrds))
1510                 return(-ENODEV);
1511         brdp = stli_brds[portp->brdnr];
1512         if (brdp == (stlibrd_t *) NULL)
1513                 return(-ENODEV);
1514
1515         stli_mkasyport(portp, &aport, portp->tty->termios);
1516         return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
1517 }
1518
1519 /*****************************************************************************/
1520
1521 /*
1522  *      Wait for a specified delay period, this is not a busy-loop. It will
1523  *      give up the processor while waiting. Unfortunately this has some
1524  *      rather intimate knowledge of the process management stuff.
1525  */
1526
1527 static void stli_delay(int len)
1528 {
1529 #if DEBUG
1530         printk("stli_delay(len=%d)\n", len);
1531 #endif
1532         if (len > 0) {
1533                 current->state = TASK_INTERRUPTIBLE;
1534                 schedule_timeout(len);
1535                 current->state = TASK_RUNNING;
1536         }
1537 }
1538
1539 /*****************************************************************************/
1540
1541 /*
1542  *      Possibly need to wait for carrier (DCD signal) to come high. Say
1543  *      maybe because if we are clocal then we don't need to wait...
1544  */
1545
1546 static int stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp)
1547 {
1548         unsigned long   flags;
1549         int             rc, doclocal;
1550
1551 #if DEBUG
1552         printk("stli_waitcarrier(brdp=%x,portp=%x,filp=%x)\n",
1553                 (int) brdp, (int) portp, (int) filp);
1554 #endif
1555
1556         rc = 0;
1557         doclocal = 0;
1558
1559         if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
1560                 if (portp->normaltermios.c_cflag & CLOCAL)
1561                         doclocal++;
1562         } else {
1563                 if (portp->tty->termios->c_cflag & CLOCAL)
1564                         doclocal++;
1565         }
1566
1567         save_flags(flags);
1568         cli();
1569         portp->openwaitcnt++;
1570         if (! tty_hung_up_p(filp))
1571                 portp->refcount--;
1572
1573         for (;;) {
1574                 if ((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) {
1575                         stli_mkasysigs(&portp->asig, 1, 1);
1576                         if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
1577                             &portp->asig, sizeof(asysigs_t), 0)) < 0)
1578                                 break;
1579                 }
1580                 if (tty_hung_up_p(filp) ||
1581                     ((portp->flags & ASYNC_INITIALIZED) == 0)) {
1582                         if (portp->flags & ASYNC_HUP_NOTIFY)
1583                                 rc = -EBUSY;
1584                         else
1585                                 rc = -ERESTARTSYS;
1586                         break;
1587                 }
1588                 if (((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) &&
1589                     ((portp->flags & ASYNC_CLOSING) == 0) &&
1590                     (doclocal || (portp->sigs & TIOCM_CD))) {
1591                         break;
1592                 }
1593                 if (signal_pending(current)) {
1594                         rc = -ERESTARTSYS;
1595                         break;
1596                 }
1597                 interruptible_sleep_on(&portp->open_wait);
1598         }
1599
1600         if (! tty_hung_up_p(filp))
1601                 portp->refcount++;
1602         portp->openwaitcnt--;
1603         restore_flags(flags);
1604
1605         return(rc);
1606 }
1607
1608 /*****************************************************************************/
1609
1610 /*
1611  *      Write routine. Take the data and put it in the shared memory ring
1612  *      queue. If port is not already sending chars then need to mark the
1613  *      service bits for this port.
1614  */
1615
1616 static int stli_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count)
1617 {
1618         volatile cdkasy_t       *ap;
1619         volatile cdkhdr_t       *hdrp;
1620         volatile unsigned char  *bits;
1621         unsigned char           *shbuf, *chbuf;
1622         stliport_t              *portp;
1623         stlibrd_t               *brdp;
1624         unsigned int            len, stlen, head, tail, size;
1625         unsigned long           flags;
1626
1627 #if DEBUG
1628         printk("stli_write(tty=%x,from_user=%d,buf=%x,count=%d)\n",
1629                 (int) tty, from_user, (int) buf, count);
1630 #endif
1631
1632         if ((tty == (struct tty_struct *) NULL) ||
1633             (stli_tmpwritebuf == (char *) NULL))
1634                 return(0);
1635         if (tty == stli_txcooktty)
1636                 stli_flushchars(tty);
1637         portp = tty->driver_data;
1638         if (portp == (stliport_t *) NULL)
1639                 return(0);
1640         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1641                 return(0);
1642         brdp = stli_brds[portp->brdnr];
1643         if (brdp == (stlibrd_t *) NULL)
1644                 return(0);
1645         chbuf = (unsigned char *) buf;
1646
1647 /*
1648  *      If copying direct from user space we need to be able to handle page
1649  *      faults while we are copying. To do this copy as much as we can now
1650  *      into a kernel buffer. From there we copy it into shared memory. The
1651  *      big problem is that we do not want shared memory enabled when we are
1652  *      sleeping (other boards may be serviced while asleep). Something else
1653  *      to note here is the reading of the tail twice. Since the boards
1654  *      shared memory can be on an 8-bit bus then we need to be very careful
1655  *      reading 16 bit quantities - since both the board (slave) and host
1656  *      could be writing and reading at the same time.
1657  */
1658         if (from_user) {
1659                 save_flags(flags);
1660                 cli();
1661                 EBRDENABLE(brdp);
1662                 ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1663                 head = (unsigned int) ap->txq.head;
1664                 tail = (unsigned int) ap->txq.tail;
1665                 if (tail != ((unsigned int) ap->txq.tail))
1666                         tail = (unsigned int) ap->txq.tail;
1667                 len = (head >= tail) ? (portp->txsize - (head - tail) - 1) :
1668                         (tail - head - 1);
1669                 count = MIN(len, count);
1670                 EBRDDISABLE(brdp);
1671                 restore_flags(flags);
1672
1673                 down(&stli_tmpwritesem);
1674                 copy_from_user(stli_tmpwritebuf, chbuf, count);
1675                 chbuf = &stli_tmpwritebuf[0];
1676         }
1677
1678 /*
1679  *      All data is now local, shove as much as possible into shared memory.
1680  */
1681         save_flags(flags);
1682         cli();
1683         EBRDENABLE(brdp);
1684         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1685         head = (unsigned int) ap->txq.head;
1686         tail = (unsigned int) ap->txq.tail;
1687         if (tail != ((unsigned int) ap->txq.tail))
1688                 tail = (unsigned int) ap->txq.tail;
1689         size = portp->txsize;
1690         if (head >= tail) {
1691                 len = size - (head - tail) - 1;
1692                 stlen = size - head;
1693         } else {
1694                 len = tail - head - 1;
1695                 stlen = len;
1696         }
1697
1698         len = MIN(len, count);
1699         count = 0;
1700         shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
1701
1702         while (len > 0) {
1703                 stlen = MIN(len, stlen);
1704                 memcpy((shbuf + head), chbuf, stlen);
1705                 chbuf += stlen;
1706                 len -= stlen;
1707                 count += stlen;
1708                 head += stlen;
1709                 if (head >= size) {
1710                         head = 0;
1711                         stlen = tail;
1712                 }
1713         }
1714
1715         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1716         ap->txq.head = head;
1717         if (test_bit(ST_TXBUSY, &portp->state)) {
1718                 if (ap->changed.data & DT_TXEMPTY)
1719                         ap->changed.data &= ~DT_TXEMPTY;
1720         }
1721         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1722         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
1723                 portp->portidx;
1724         *bits |= portp->portbit;
1725         set_bit(ST_TXBUSY, &portp->state);
1726         EBRDDISABLE(brdp);
1727
1728         if (from_user)
1729                 up(&stli_tmpwritesem);
1730         restore_flags(flags);
1731
1732         return(count);
1733 }
1734
1735 /*****************************************************************************/
1736
1737 /*
1738  *      Output a single character. We put it into a temporary local buffer
1739  *      (for speed) then write out that buffer when the flushchars routine
1740  *      is called. There is a safety catch here so that if some other port
1741  *      writes chars before the current buffer has been, then we write them
1742  *      first them do the new ports.
1743  */
1744
1745 static void stli_putchar(struct tty_struct *tty, unsigned char ch)
1746 {
1747 #if DEBUG
1748         printk("stli_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
1749 #endif
1750
1751         if (tty == (struct tty_struct *) NULL)
1752                 return;
1753         if (tty != stli_txcooktty) {
1754                 if (stli_txcooktty != (struct tty_struct *) NULL)
1755                         stli_flushchars(stli_txcooktty);
1756                 stli_txcooktty = tty;
1757         }
1758
1759         stli_txcookbuf[stli_txcooksize++] = ch;
1760 }
1761
1762 /*****************************************************************************/
1763
1764 /*
1765  *      Transfer characters from the local TX cooking buffer to the board.
1766  *      We sort of ignore the tty that gets passed in here. We rely on the
1767  *      info stored with the TX cook buffer to tell us which port to flush
1768  *      the data on. In any case we clean out the TX cook buffer, for re-use
1769  *      by someone else.
1770  */
1771
1772 static void stli_flushchars(struct tty_struct *tty)
1773 {
1774         volatile cdkhdr_t       *hdrp;
1775         volatile unsigned char  *bits;
1776         volatile cdkasy_t       *ap;
1777         struct tty_struct       *cooktty;
1778         stliport_t              *portp;
1779         stlibrd_t               *brdp;
1780         unsigned int            len, stlen, head, tail, size, count, cooksize;
1781         unsigned char           *buf, *shbuf;
1782         unsigned long           flags;
1783
1784 #if DEBUG
1785         printk("stli_flushchars(tty=%x)\n", (int) tty);
1786 #endif
1787
1788         cooksize = stli_txcooksize;
1789         cooktty = stli_txcooktty;
1790         stli_txcooksize = 0;
1791         stli_txcookrealsize = 0;
1792         stli_txcooktty = (struct tty_struct *) NULL;
1793
1794         if (tty == (struct tty_struct *) NULL)
1795                 return;
1796         if (cooktty == (struct tty_struct *) NULL)
1797                 return;
1798         if (tty != cooktty)
1799                 tty = cooktty;
1800         if (cooksize == 0)
1801                 return;
1802
1803         portp = tty->driver_data;
1804         if (portp == (stliport_t *) NULL)
1805                 return;
1806         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1807                 return;
1808         brdp = stli_brds[portp->brdnr];
1809         if (brdp == (stlibrd_t *) NULL)
1810                 return;
1811
1812         save_flags(flags);
1813         cli();
1814         EBRDENABLE(brdp);
1815
1816         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1817         head = (unsigned int) ap->txq.head;
1818         tail = (unsigned int) ap->txq.tail;
1819         if (tail != ((unsigned int) ap->txq.tail))
1820                 tail = (unsigned int) ap->txq.tail;
1821         size = portp->txsize;
1822         if (head >= tail) {
1823                 len = size - (head - tail) - 1;
1824                 stlen = size - head;
1825         } else {
1826                 len = tail - head - 1;
1827                 stlen = len;
1828         }
1829
1830         len = MIN(len, cooksize);
1831         count = 0;
1832         shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
1833         buf = stli_txcookbuf;
1834
1835         while (len > 0) {
1836                 stlen = MIN(len, stlen);
1837                 memcpy((shbuf + head), buf, stlen);
1838                 buf += stlen;
1839                 len -= stlen;
1840                 count += stlen;
1841                 head += stlen;
1842                 if (head >= size) {
1843                         head = 0;
1844                         stlen = tail;
1845                 }
1846         }
1847
1848         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1849         ap->txq.head = head;
1850
1851         if (test_bit(ST_TXBUSY, &portp->state)) {
1852                 if (ap->changed.data & DT_TXEMPTY)
1853                         ap->changed.data &= ~DT_TXEMPTY;
1854         }
1855         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1856         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
1857                 portp->portidx;
1858         *bits |= portp->portbit;
1859         set_bit(ST_TXBUSY, &portp->state);
1860
1861         EBRDDISABLE(brdp);
1862         restore_flags(flags);
1863 }
1864
1865 /*****************************************************************************/
1866
1867 static int stli_writeroom(struct tty_struct *tty)
1868 {
1869         volatile cdkasyrq_t     *rp;
1870         stliport_t              *portp;
1871         stlibrd_t               *brdp;
1872         unsigned int            head, tail, len;
1873         unsigned long           flags;
1874
1875 #if DEBUG
1876         printk("stli_writeroom(tty=%x)\n", (int) tty);
1877 #endif
1878
1879         if (tty == (struct tty_struct *) NULL)
1880                 return(0);
1881         if (tty == stli_txcooktty) {
1882                 if (stli_txcookrealsize != 0) {
1883                         len = stli_txcookrealsize - stli_txcooksize;
1884                         return(len);
1885                 }
1886         }
1887
1888         portp = tty->driver_data;
1889         if (portp == (stliport_t *) NULL)
1890                 return(0);
1891         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1892                 return(0);
1893         brdp = stli_brds[portp->brdnr];
1894         if (brdp == (stlibrd_t *) NULL)
1895                 return(0);
1896
1897         save_flags(flags);
1898         cli();
1899         EBRDENABLE(brdp);
1900         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1901         head = (unsigned int) rp->head;
1902         tail = (unsigned int) rp->tail;
1903         if (tail != ((unsigned int) rp->tail))
1904                 tail = (unsigned int) rp->tail;
1905         len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
1906         len--;
1907         EBRDDISABLE(brdp);
1908         restore_flags(flags);
1909
1910         if (tty == stli_txcooktty) {
1911                 stli_txcookrealsize = len;
1912                 len -= stli_txcooksize;
1913         }
1914         return(len);
1915 }
1916
1917 /*****************************************************************************/
1918
1919 /*
1920  *      Return the number of characters in the transmit buffer. Normally we
1921  *      will return the number of chars in the shared memory ring queue.
1922  *      We need to kludge around the case where the shared memory buffer is
1923  *      empty but not all characters have drained yet, for this case just
1924  *      return that there is 1 character in the buffer!
1925  */
1926
1927 static int stli_charsinbuffer(struct tty_struct *tty)
1928 {
1929         volatile cdkasyrq_t     *rp;
1930         stliport_t              *portp;
1931         stlibrd_t               *brdp;
1932         unsigned int            head, tail, len;
1933         unsigned long           flags;
1934
1935 #if DEBUG
1936         printk("stli_charsinbuffer(tty=%x)\n", (int) tty);
1937 #endif
1938
1939         if (tty == (struct tty_struct *) NULL)
1940                 return(0);
1941         if (tty == stli_txcooktty)
1942                 stli_flushchars(tty);
1943         portp = tty->driver_data;
1944         if (portp == (stliport_t *) NULL)
1945                 return(0);
1946         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1947                 return(0);
1948         brdp = stli_brds[portp->brdnr];
1949         if (brdp == (stlibrd_t *) NULL)
1950                 return(0);
1951
1952         save_flags(flags);
1953         cli();
1954         EBRDENABLE(brdp);
1955         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1956         head = (unsigned int) rp->head;
1957         tail = (unsigned int) rp->tail;
1958         if (tail != ((unsigned int) rp->tail))
1959                 tail = (unsigned int) rp->tail;
1960         len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
1961         if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
1962                 len = 1;
1963         EBRDDISABLE(brdp);
1964         restore_flags(flags);
1965
1966         return(len);
1967 }
1968
1969 /*****************************************************************************/
1970
1971 /*
1972  *      Generate the serial struct info.
1973  */
1974
1975 static void stli_getserial(stliport_t *portp, struct serial_struct *sp)
1976 {
1977         struct serial_struct    sio;
1978         stlibrd_t               *brdp;
1979
1980 #if DEBUG
1981         printk("stli_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1982 #endif
1983
1984         memset(&sio, 0, sizeof(struct serial_struct));
1985         sio.type = PORT_UNKNOWN;
1986         sio.line = portp->portnr;
1987         sio.irq = 0;
1988         sio.flags = portp->flags;
1989         sio.baud_base = portp->baud_base;
1990         sio.close_delay = portp->close_delay;
1991         sio.closing_wait = portp->closing_wait;
1992         sio.custom_divisor = portp->custom_divisor;
1993         sio.xmit_fifo_size = 0;
1994         sio.hub6 = 0;
1995
1996         brdp = stli_brds[portp->brdnr];
1997         if (brdp != (stlibrd_t *) NULL)
1998                 sio.port = brdp->iobase;
1999
2000         copy_to_user(sp, &sio, sizeof(struct serial_struct));
2001 }
2002
2003 /*****************************************************************************/
2004
2005 /*
2006  *      Set port according to the serial struct info.
2007  *      At this point we do not do any auto-configure stuff, so we will
2008  *      just quietly ignore any requests to change irq, etc.
2009  */
2010
2011 static int stli_setserial(stliport_t *portp, struct serial_struct *sp)
2012 {
2013         struct serial_struct    sio;
2014         int                     rc;
2015
2016 #if DEBUG
2017         printk("stli_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
2018 #endif
2019
2020         copy_from_user(&sio, sp, sizeof(struct serial_struct));
2021         if (!capable(CAP_SYS_ADMIN)) {
2022                 if ((sio.baud_base != portp->baud_base) ||
2023                     (sio.close_delay != portp->close_delay) ||
2024                     ((sio.flags & ~ASYNC_USR_MASK) !=
2025                     (portp->flags & ~ASYNC_USR_MASK)))
2026                         return(-EPERM);
2027         }
2028
2029         portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
2030                 (sio.flags & ASYNC_USR_MASK);
2031         portp->baud_base = sio.baud_base;
2032         portp->close_delay = sio.close_delay;
2033         portp->closing_wait = sio.closing_wait;
2034         portp->custom_divisor = sio.custom_divisor;
2035
2036         if ((rc = stli_setport(portp)) < 0)
2037                 return(rc);
2038         return(0);
2039 }
2040
2041 /*****************************************************************************/
2042
2043 static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
2044 {
2045         stliport_t      *portp;
2046         stlibrd_t       *brdp;
2047         unsigned long   lval;
2048         unsigned int    ival;
2049         int             rc;
2050
2051 #if DEBUG
2052         printk("stli_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n",
2053                 (int) tty, (int) file, cmd, (int) arg);
2054 #endif
2055
2056         if (tty == (struct tty_struct *) NULL)
2057                 return(-ENODEV);
2058         portp = tty->driver_data;
2059         if (portp == (stliport_t *) NULL)
2060                 return(-ENODEV);
2061         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2062                 return(0);
2063         brdp = stli_brds[portp->brdnr];
2064         if (brdp == (stlibrd_t *) NULL)
2065                 return(0);
2066
2067         if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
2068             (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
2069                 if (tty->flags & (1 << TTY_IO_ERROR))
2070                         return(-EIO);
2071         }
2072
2073         rc = 0;
2074
2075         switch (cmd) {
2076         case TIOCGSOFTCAR:
2077                 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
2078                         (unsigned int *) arg);
2079                 break;
2080         case TIOCSSOFTCAR:
2081                 if ((rc = verify_area(VERIFY_READ, (void *) arg,
2082                     sizeof(unsigned int))) == 0) {
2083                         get_user(ival, (unsigned int *) arg);
2084                         tty->termios->c_cflag =
2085                                 (tty->termios->c_cflag & ~CLOCAL) |
2086                                 (ival ? CLOCAL : 0);
2087                 }
2088                 break;
2089         case TIOCMGET:
2090                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
2091                     sizeof(unsigned int))) == 0) {
2092                         if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS,
2093                             &portp->asig, sizeof(asysigs_t), 1)) < 0)
2094                                 return(rc);
2095                         lval = stli_mktiocm(portp->asig.sigvalue);
2096                         put_user(lval, (unsigned int *) arg);
2097                 }
2098                 break;
2099         case TIOCMBIS:
2100                 if ((rc = verify_area(VERIFY_READ, (void *) arg,
2101                     sizeof(unsigned int))) == 0) {
2102                         get_user(ival, (unsigned int *) arg);
2103                         stli_mkasysigs(&portp->asig,
2104                                 ((ival & TIOCM_DTR) ? 1 : -1),
2105                                 ((ival & TIOCM_RTS) ? 1 : -1));
2106                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
2107                                 &portp->asig, sizeof(asysigs_t), 0);
2108                 }
2109                 break;
2110         case TIOCMBIC:
2111                 if ((rc = verify_area(VERIFY_READ, (void *) arg,
2112                     sizeof(unsigned int))) == 0) {
2113                         get_user(ival, (unsigned int *) arg);
2114                         stli_mkasysigs(&portp->asig,
2115                                 ((ival & TIOCM_DTR) ? 0 : -1),
2116                                 ((ival & TIOCM_RTS) ? 0 : -1));
2117                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
2118                                 &portp->asig, sizeof(asysigs_t), 0);
2119                 }
2120                 break;
2121         case TIOCMSET:
2122                 if ((rc = verify_area(VERIFY_READ, (void *) arg,
2123                     sizeof(unsigned int))) == 0) {
2124                         get_user(ival, (unsigned int *) arg);
2125                         stli_mkasysigs(&portp->asig,
2126                                 ((ival & TIOCM_DTR) ? 1 : 0),
2127                                 ((ival & TIOCM_RTS) ? 1 : 0));
2128                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
2129                                 &portp->asig, sizeof(asysigs_t), 0);
2130                 }
2131                 break;
2132         case TIOCGSERIAL:
2133                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
2134                     sizeof(struct serial_struct))) == 0)
2135                         stli_getserial(portp, (struct serial_struct *) arg);
2136                 break;
2137         case TIOCSSERIAL:
2138                 if ((rc = verify_area(VERIFY_READ, (void *) arg,
2139                     sizeof(struct serial_struct))) == 0)
2140                         rc = stli_setserial(portp, (struct serial_struct *)arg);
2141                 break;
2142         case STL_GETPFLAG:
2143                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
2144                     sizeof(unsigned long))) == 0)
2145                         put_user(portp->pflag, (unsigned int *) arg);
2146                 break;
2147         case STL_SETPFLAG:
2148                 if ((rc = verify_area(VERIFY_READ, (void *) arg,
2149                     sizeof(unsigned long))) == 0) {
2150                         get_user(portp->pflag, (unsigned int *) arg);
2151                         stli_setport(portp);
2152                 }
2153                 break;
2154         case COM_GETPORTSTATS:
2155                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
2156                     sizeof(comstats_t))) == 0)
2157                         rc = stli_getportstats(portp, (comstats_t *) arg);
2158                 break;
2159         case COM_CLRPORTSTATS:
2160                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
2161                     sizeof(comstats_t))) == 0)
2162                         rc = stli_clrportstats(portp, (comstats_t *) arg);
2163                 break;
2164         case TIOCSERCONFIG:
2165         case TIOCSERGWILD:
2166         case TIOCSERSWILD:
2167         case TIOCSERGETLSR:
2168         case TIOCSERGSTRUCT:
2169         case TIOCSERGETMULTI:
2170         case TIOCSERSETMULTI:
2171         default:
2172                 rc = -ENOIOCTLCMD;
2173                 break;
2174         }
2175
2176         return(rc);
2177 }
2178
2179 /*****************************************************************************/
2180
2181 /*
2182  *      This routine assumes that we have user context and can sleep.
2183  *      Looks like it is true for the current ttys implementation..!!
2184  */
2185
2186 static void stli_settermios(struct tty_struct *tty, struct termios *old)
2187 {
2188         stliport_t      *portp;
2189         stlibrd_t       *brdp;
2190         struct termios  *tiosp;
2191         asyport_t       aport;
2192
2193 #if DEBUG
2194         printk("stli_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
2195 #endif
2196
2197         if (tty == (struct tty_struct *) NULL)
2198                 return;
2199         portp = tty->driver_data;
2200         if (portp == (stliport_t *) NULL)
2201                 return;
2202         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2203                 return;
2204         brdp = stli_brds[portp->brdnr];
2205         if (brdp == (stlibrd_t *) NULL)
2206                 return;
2207
2208         tiosp = tty->termios;
2209         if ((tiosp->c_cflag == old->c_cflag) &&
2210             (tiosp->c_iflag == old->c_iflag))
2211                 return;
2212
2213         stli_mkasyport(portp, &aport, tiosp);
2214         stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
2215         stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
2216         stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
2217                 sizeof(asysigs_t), 0);
2218         if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0))
2219                 tty->hw_stopped = 0;
2220         if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
2221                 wake_up_interruptible(&portp->open_wait);
2222 }
2223
2224 /*****************************************************************************/
2225
2226 /*
2227  *      Attempt to flow control who ever is sending us data. We won't really
2228  *      do any flow control action here. We can't directly, and even if we
2229  *      wanted to we would have to send a command to the slave. The slave
2230  *      knows how to flow control, and will do so when its buffers reach its
2231  *      internal high water marks. So what we will do is set a local state
2232  *      bit that will stop us sending any RX data up from the poll routine
2233  *      (which is the place where RX data from the slave is handled).
2234  */
2235
2236 static void stli_throttle(struct tty_struct *tty)
2237 {
2238         stliport_t      *portp;
2239
2240 #if DEBUG
2241         printk("stli_throttle(tty=%x)\n", (int) tty);
2242 #endif
2243
2244         if (tty == (struct tty_struct *) NULL)
2245                 return;
2246         portp = tty->driver_data;
2247         if (portp == (stliport_t *) NULL)
2248                 return;
2249
2250         set_bit(ST_RXSTOP, &portp->state);
2251 }
2252
2253 /*****************************************************************************/
2254
2255 /*
2256  *      Unflow control the device sending us data... That means that all
2257  *      we have to do is clear the RXSTOP state bit. The next poll call
2258  *      will then be able to pass the RX data back up.
2259  */
2260
2261 static void stli_unthrottle(struct tty_struct *tty)
2262 {
2263         stliport_t      *portp;
2264
2265 #if DEBUG
2266         printk("stli_unthrottle(tty=%x)\n", (int) tty);
2267 #endif
2268
2269         if (tty == (struct tty_struct *) NULL)
2270                 return;
2271         portp = tty->driver_data;
2272         if (portp == (stliport_t *) NULL)
2273                 return;
2274
2275         clear_bit(ST_RXSTOP, &portp->state);
2276 }
2277
2278 /*****************************************************************************/
2279
2280 /*
2281  *      Stop the transmitter. Basically to do this we will just turn TX
2282  *      interrupts off.
2283  */
2284
2285 static void stli_stop(struct tty_struct *tty)
2286 {
2287         stlibrd_t       *brdp;
2288         stliport_t      *portp;
2289         asyctrl_t       actrl;
2290
2291 #if DEBUG
2292         printk("stli_stop(tty=%x)\n", (int) tty);
2293 #endif
2294
2295         if (tty == (struct tty_struct *) NULL)
2296                 return;
2297         portp = tty->driver_data;
2298         if (portp == (stliport_t *) NULL)
2299                 return;
2300         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2301                 return;
2302         brdp = stli_brds[portp->brdnr];
2303         if (brdp == (stlibrd_t *) NULL)
2304                 return;
2305
2306         memset(&actrl, 0, sizeof(asyctrl_t));
2307         actrl.txctrl = CT_STOPFLOW;
2308 #if 0
2309         stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
2310 #endif
2311 }
2312
2313 /*****************************************************************************/
2314
2315 /*
2316  *      Start the transmitter again. Just turn TX interrupts back on.
2317  */
2318
2319 static void stli_start(struct tty_struct *tty)
2320 {
2321         stliport_t      *portp;
2322         stlibrd_t       *brdp;
2323         asyctrl_t       actrl;
2324
2325 #if DEBUG
2326         printk("stli_start(tty=%x)\n", (int) tty);
2327 #endif
2328
2329         if (tty == (struct tty_struct *) NULL)
2330                 return;
2331         portp = tty->driver_data;
2332         if (portp == (stliport_t *) NULL)
2333                 return;
2334         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2335                 return;
2336         brdp = stli_brds[portp->brdnr];
2337         if (brdp == (stlibrd_t *) NULL)
2338                 return;
2339
2340         memset(&actrl, 0, sizeof(asyctrl_t));
2341         actrl.txctrl = CT_STARTFLOW;
2342 #if 0
2343         stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
2344 #endif
2345 }
2346
2347 /*****************************************************************************/
2348
2349 /*
2350  *      Scheduler called hang up routine. This is called from the scheduler,
2351  *      not direct from the driver "poll" routine. We can't call it there
2352  *      since the real local hangup code will enable/disable the board and
2353  *      other things that we can't do while handling the poll. Much easier
2354  *      to deal with it some time later (don't really care when, hangups
2355  *      aren't that time critical).
2356  */
2357
2358 static void stli_dohangup(void *arg)
2359 {
2360         stliport_t      *portp;
2361
2362 #if DEBUG
2363         printk("stli_dohangup(portp=%x)\n", (int) arg);
2364 #endif
2365
2366         portp = (stliport_t *) arg;
2367         if (portp == (stliport_t *) NULL)
2368                 return;
2369         if (portp->tty == (struct tty_struct *) NULL)
2370                 return;
2371         tty_hangup(portp->tty);
2372 }
2373
2374 /*****************************************************************************/
2375
2376 /*
2377  *      Hangup this port. This is pretty much like closing the port, only
2378  *      a little more brutal. No waiting for data to drain. Shutdown the
2379  *      port and maybe drop signals. This is rather tricky really. We want
2380  *      to close the port as well.
2381  */
2382
2383 static void stli_hangup(struct tty_struct *tty)
2384 {
2385         stliport_t      *portp;
2386         stlibrd_t       *brdp;
2387         unsigned long   flags;
2388
2389 #if DEBUG
2390         printk("stli_hangup(tty=%x)\n", (int) tty);
2391 #endif
2392
2393         if (tty == (struct tty_struct *) NULL)
2394                 return;
2395         portp = tty->driver_data;
2396         if (portp == (stliport_t *) NULL)
2397                 return;
2398         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2399                 return;
2400         brdp = stli_brds[portp->brdnr];
2401         if (brdp == (stlibrd_t *) NULL)
2402                 return;
2403
2404         portp->flags &= ~ASYNC_INITIALIZED;
2405
2406         save_flags(flags);
2407         cli();
2408         if (! test_bit(ST_CLOSING, &portp->state))
2409                 stli_rawclose(brdp, portp, 0, 0);
2410         if (tty->termios->c_cflag & HUPCL) {
2411                 stli_mkasysigs(&portp->asig, 0, 0);
2412                 if (test_bit(ST_CMDING, &portp->state)) {
2413                         set_bit(ST_DOSIGS, &portp->state);
2414                         set_bit(ST_DOFLUSHTX, &portp->state);
2415                         set_bit(ST_DOFLUSHRX, &portp->state);
2416                 } else {
2417                         stli_sendcmd(brdp, portp, A_SETSIGNALSF,
2418                                 &portp->asig, sizeof(asysigs_t), 0);
2419                 }
2420         }
2421         restore_flags(flags);
2422
2423         clear_bit(ST_TXBUSY, &portp->state);
2424         clear_bit(ST_RXSTOP, &portp->state);
2425         set_bit(TTY_IO_ERROR, &tty->flags);
2426         portp->tty = (struct tty_struct *) NULL;
2427         portp->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
2428         portp->refcount = 0;
2429         wake_up_interruptible(&portp->open_wait);
2430 }
2431
2432 /*****************************************************************************/
2433
2434 /*
2435  *      Flush characters from the lower buffer. We may not have user context
2436  *      so we cannot sleep waiting for it to complete. Also we need to check
2437  *      if there is chars for this port in the TX cook buffer, and flush them
2438  *      as well.
2439  */
2440
2441 static void stli_flushbuffer(struct tty_struct *tty)
2442 {
2443         stliport_t      *portp;
2444         stlibrd_t       *brdp;
2445         unsigned long   ftype, flags;
2446
2447 #if DEBUG
2448         printk("stli_flushbuffer(tty=%x)\n", (int) tty);
2449 #endif
2450
2451         if (tty == (struct tty_struct *) NULL)
2452                 return;
2453         portp = tty->driver_data;
2454         if (portp == (stliport_t *) NULL)
2455                 return;
2456         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2457                 return;
2458         brdp = stli_brds[portp->brdnr];
2459         if (brdp == (stlibrd_t *) NULL)
2460                 return;
2461
2462         save_flags(flags);
2463         cli();
2464         if (tty == stli_txcooktty) {
2465                 stli_txcooktty = (struct tty_struct *) NULL;
2466                 stli_txcooksize = 0;
2467                 stli_txcookrealsize = 0;
2468         }
2469         if (test_bit(ST_CMDING, &portp->state)) {
2470                 set_bit(ST_DOFLUSHTX, &portp->state);
2471         } else {
2472                 ftype = FLUSHTX;
2473                 if (test_bit(ST_DOFLUSHRX, &portp->state)) {
2474                         ftype |= FLUSHRX;
2475                         clear_bit(ST_DOFLUSHRX, &portp->state);
2476                 }
2477                 stli_sendcmd(brdp, portp, A_FLUSH, &ftype,
2478                         sizeof(unsigned long), 0);
2479         }
2480         restore_flags(flags);
2481
2482         wake_up_interruptible(&tty->write_wait);
2483         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
2484             tty->ldisc.write_wakeup)
2485                 (tty->ldisc.write_wakeup)(tty);
2486 }
2487
2488 /*****************************************************************************/
2489
2490 static void stli_breakctl(struct tty_struct *tty, int state)
2491 {
2492         stlibrd_t       *brdp;
2493         stliport_t      *portp;
2494         long            arg;
2495         /* long savestate, savetime; */
2496
2497 #if DEBUG
2498         printk("stli_breakctl(tty=%x,state=%d)\n", (int) tty, state);
2499 #endif
2500
2501         if (tty == (struct tty_struct *) NULL)
2502                 return;
2503         portp = tty->driver_data;
2504         if (portp == (stliport_t *) NULL)
2505                 return;
2506         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2507                 return;
2508         brdp = stli_brds[portp->brdnr];
2509         if (brdp == (stlibrd_t *) NULL)
2510                 return;
2511
2512 /*
2513  *      Due to a bug in the tty send_break() code we need to preserve
2514  *      the current process state and timeout...
2515         savetime = current->timeout;
2516         savestate = current->state;
2517  */
2518
2519         arg = (state == -1) ? BREAKON : BREAKOFF;
2520         stli_cmdwait(brdp, portp, A_BREAK, &arg, sizeof(long), 0);
2521
2522 /*
2523  *
2524         current->timeout = savetime;
2525         current->state = savestate;
2526  */
2527 }
2528
2529 /*****************************************************************************/
2530
2531 static void stli_waituntilsent(struct tty_struct *tty, int timeout)
2532 {
2533         stliport_t      *portp;
2534         unsigned long   tend;
2535
2536 #if DEBUG
2537         printk("stli_waituntilsent(tty=%x,timeout=%x)\n", (int) tty, timeout);
2538 #endif
2539
2540         if (tty == (struct tty_struct *) NULL)
2541                 return;
2542         portp = tty->driver_data;
2543         if (portp == (stliport_t *) NULL)
2544                 return;
2545
2546         if (timeout == 0)
2547                 timeout = HZ;
2548         tend = jiffies + timeout;
2549
2550         while (test_bit(ST_TXBUSY, &portp->state)) {
2551                 if (signal_pending(current))
2552                         break;
2553                 stli_delay(2);
2554                 if (time_after_eq(jiffies, tend))
2555                         break;
2556         }
2557 }
2558
2559 /*****************************************************************************/
2560
2561 static void stli_sendxchar(struct tty_struct *tty, char ch)
2562 {
2563         stlibrd_t       *brdp;
2564         stliport_t      *portp;
2565         asyctrl_t       actrl;
2566
2567 #if DEBUG
2568         printk("stli_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch);
2569 #endif
2570
2571         if (tty == (struct tty_struct *) NULL)
2572                 return;
2573         portp = tty->driver_data;
2574         if (portp == (stliport_t *) NULL)
2575                 return;
2576         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2577                 return;
2578         brdp = stli_brds[portp->brdnr];
2579         if (brdp == (stlibrd_t *) NULL)
2580                 return;
2581
2582         memset(&actrl, 0, sizeof(asyctrl_t));
2583         if (ch == STOP_CHAR(tty)) {
2584                 actrl.rxctrl = CT_STOPFLOW;
2585         } else if (ch == START_CHAR(tty)) {
2586                 actrl.rxctrl = CT_STARTFLOW;
2587         } else {
2588                 actrl.txctrl = CT_SENDCHR;
2589                 actrl.tximdch = ch;
2590         }
2591
2592         stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
2593 }
2594
2595 /*****************************************************************************/
2596
2597 #define MAXLINE         80
2598
2599 /*
2600  *      Format info for a specified port. The line is deliberately limited
2601  *      to 80 characters. (If it is too long it will be truncated, if too
2602  *      short then padded with spaces).
2603  */
2604
2605 static int stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos)
2606 {
2607         char    *sp, *uart;
2608         int     rc, cnt;
2609
2610         rc = stli_portcmdstats(portp);
2611
2612         uart = "UNKNOWN";
2613         if (brdp->state & BST_STARTED) {
2614                 switch (stli_comstats.hwid) {
2615                 case 0:         uart = "2681"; break;
2616                 case 1:         uart = "SC26198"; break;
2617                 default:        uart = "CD1400"; break;
2618                 }
2619         }
2620
2621         sp = pos;
2622         sp += sprintf(sp, "%d: uart:%s ", portnr, uart);
2623
2624         if ((brdp->state & BST_STARTED) && (rc >= 0)) {
2625                 sp += sprintf(sp, "tx:%d rx:%d", (int) stli_comstats.txtotal,
2626                         (int) stli_comstats.rxtotal);
2627
2628                 if (stli_comstats.rxframing)
2629                         sp += sprintf(sp, " fe:%d",
2630                                 (int) stli_comstats.rxframing);
2631                 if (stli_comstats.rxparity)
2632                         sp += sprintf(sp, " pe:%d",
2633                                 (int) stli_comstats.rxparity);
2634                 if (stli_comstats.rxbreaks)
2635                         sp += sprintf(sp, " brk:%d",
2636                                 (int) stli_comstats.rxbreaks);
2637                 if (stli_comstats.rxoverrun)
2638                         sp += sprintf(sp, " oe:%d",
2639                                 (int) stli_comstats.rxoverrun);
2640
2641                 cnt = sprintf(sp, "%s%s%s%s%s ",
2642                         (stli_comstats.signals & TIOCM_RTS) ? "|RTS" : "",
2643                         (stli_comstats.signals & TIOCM_CTS) ? "|CTS" : "",
2644                         (stli_comstats.signals & TIOCM_DTR) ? "|DTR" : "",
2645                         (stli_comstats.signals & TIOCM_CD) ? "|DCD" : "",
2646                         (stli_comstats.signals & TIOCM_DSR) ? "|DSR" : "");
2647                 *sp = ' ';
2648                 sp += cnt;
2649         }
2650
2651         for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
2652                 *sp++ = ' ';
2653         if (cnt >= MAXLINE)
2654                 pos[(MAXLINE - 2)] = '+';
2655         pos[(MAXLINE - 1)] = '\n';
2656
2657         return(MAXLINE);
2658 }
2659
2660 /*****************************************************************************/
2661
2662 /*
2663  *      Port info, read from the /proc file system.
2664  */
2665
2666 static int stli_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
2667 {
2668         stlibrd_t       *brdp;
2669         stliport_t      *portp;
2670         int             brdnr, portnr, totalport;
2671         int             curoff, maxoff;
2672         char            *pos;
2673
2674 #if DEBUG
2675         printk("stli_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
2676                 "data=%x\n", (int) page, (int) start, (int) off, count,
2677                 (int) eof, (int) data);
2678 #endif
2679
2680         pos = page;
2681         totalport = 0;
2682         curoff = 0;
2683
2684         if (off == 0) {
2685                 pos += sprintf(pos, "%s: version %s", stli_drvtitle,
2686                         stli_drvversion);
2687                 while (pos < (page + MAXLINE - 1))
2688                         *pos++ = ' ';
2689                 *pos++ = '\n';
2690         }
2691         curoff =  MAXLINE;
2692
2693 /*
2694  *      We scan through for each board, panel and port. The offset is
2695  *      calculated on the fly, and irrelevant ports are skipped.
2696  */
2697         for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
2698                 brdp = stli_brds[brdnr];
2699                 if (brdp == (stlibrd_t *) NULL)
2700                         continue;
2701                 if (brdp->state == 0)
2702                         continue;
2703
2704                 maxoff = curoff + (brdp->nrports * MAXLINE);
2705                 if (off >= maxoff) {
2706                         curoff = maxoff;
2707                         continue;
2708                 }
2709
2710                 totalport = brdnr * STL_MAXPORTS;
2711                 for (portnr = 0; (portnr < brdp->nrports); portnr++,
2712                     totalport++) {
2713                         portp = brdp->ports[portnr];
2714                         if (portp == (stliport_t *) NULL)
2715                                 continue;
2716                         if (off >= (curoff += MAXLINE))
2717                                 continue;
2718                         if ((pos - page + MAXLINE) > count)
2719                                 goto stli_readdone;
2720                         pos += stli_portinfo(brdp, portp, totalport, pos);
2721                 }
2722         }
2723
2724         *eof = 1;
2725
2726 stli_readdone:
2727         *start = page;
2728         return(pos - page);
2729 }
2730
2731 /*****************************************************************************/
2732
2733 /*
2734  *      Generic send command routine. This will send a message to the slave,
2735  *      of the specified type with the specified argument. Must be very
2736  *      careful of data that will be copied out from shared memory -
2737  *      containing command results. The command completion is all done from
2738  *      a poll routine that does not have user context. Therefore you cannot
2739  *      copy back directly into user space, or to the kernel stack of a
2740  *      process. This routine does not sleep, so can be called from anywhere.
2741  */
2742
2743 static void stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
2744 {
2745         volatile cdkhdr_t       *hdrp;
2746         volatile cdkctrl_t      *cp;
2747         volatile unsigned char  *bits;
2748         unsigned long           flags;
2749
2750 #if DEBUG
2751         printk("stli_sendcmd(brdp=%x,portp=%x,cmd=%x,arg=%x,size=%d,"
2752                 "copyback=%d)\n", (int) brdp, (int) portp, (int) cmd,
2753                 (int) arg, size, copyback);
2754 #endif
2755
2756         save_flags(flags);
2757         cli();
2758
2759         if (test_bit(ST_CMDING, &portp->state)) {
2760                 printk("STALLION: command already busy, cmd=%x!\n", (int) cmd);
2761                 restore_flags(flags);
2762                 return;
2763         }
2764
2765         EBRDENABLE(brdp);
2766         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
2767         if (size > 0) {
2768                 memcpy((void *) &(cp->args[0]), arg, size);
2769                 if (copyback) {
2770                         portp->argp = arg;
2771                         portp->argsize = size;
2772                 }
2773         }
2774         cp->status = 0;
2775         cp->cmd = cmd;
2776         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2777         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
2778                 portp->portidx;
2779         *bits |= portp->portbit;
2780         set_bit(ST_CMDING, &portp->state);
2781         EBRDDISABLE(brdp);
2782         restore_flags(flags);
2783 }
2784
2785 /*****************************************************************************/
2786
2787 /*
2788  *      Read data from shared memory. This assumes that the shared memory
2789  *      is enabled and that interrupts are off. Basically we just empty out
2790  *      the shared memory buffer into the tty buffer. Must be careful to
2791  *      handle the case where we fill up the tty buffer, but still have
2792  *      more chars to unload.
2793  */
2794
2795 static inline void stli_read(stlibrd_t *brdp, stliport_t *portp)
2796 {
2797         volatile cdkasyrq_t     *rp;
2798         volatile char           *shbuf;
2799         struct tty_struct       *tty;
2800         unsigned int            head, tail, size;
2801         unsigned int            len, stlen;
2802
2803 #if DEBUG
2804         printk("stli_read(brdp=%x,portp=%d)\n", (int) brdp, (int) portp);
2805 #endif
2806
2807         if (test_bit(ST_RXSTOP, &portp->state))
2808                 return;
2809         tty = portp->tty;
2810         if (tty == (struct tty_struct *) NULL)
2811                 return;
2812
2813         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2814         head = (unsigned int) rp->head;
2815         if (head != ((unsigned int) rp->head))
2816                 head = (unsigned int) rp->head;
2817         tail = (unsigned int) rp->tail;
2818         size = portp->rxsize;
2819         if (head >= tail) {
2820                 len = head - tail;
2821                 stlen = len;
2822         } else {
2823                 len = size - (tail - head);
2824                 stlen = size - tail;
2825         }
2826
2827         len = MIN(len, (TTY_FLIPBUF_SIZE - tty->flip.count));
2828         shbuf = (volatile char *) EBRDGETMEMPTR(brdp, portp->rxoffset);
2829
2830         while (len > 0) {
2831                 stlen = MIN(len, stlen);
2832                 memcpy(tty->flip.char_buf_ptr, (char *) (shbuf + tail), stlen);
2833                 memset(tty->flip.flag_buf_ptr, 0, stlen);
2834                 tty->flip.char_buf_ptr += stlen;
2835                 tty->flip.flag_buf_ptr += stlen;
2836                 tty->flip.count += stlen;
2837
2838                 len -= stlen;
2839                 tail += stlen;
2840                 if (tail >= size) {
2841                         tail = 0;
2842                         stlen = head;
2843                 }
2844         }
2845         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2846         rp->tail = tail;
2847
2848         if (head != tail)
2849                 set_bit(ST_RXING, &portp->state);
2850
2851         tty_schedule_flip(tty);
2852 }
2853
2854 /*****************************************************************************/
2855
2856 /*
2857  *      Set up and carry out any delayed commands. There is only a small set
2858  *      of slave commands that can be done "off-level". So it is not too
2859  *      difficult to deal with them here.
2860  */
2861
2862 static inline void stli_dodelaycmd(stliport_t *portp, volatile cdkctrl_t *cp)
2863 {
2864         int     cmd;
2865
2866         if (test_bit(ST_DOSIGS, &portp->state)) {
2867                 if (test_bit(ST_DOFLUSHTX, &portp->state) &&
2868                     test_bit(ST_DOFLUSHRX, &portp->state))
2869                         cmd = A_SETSIGNALSF;
2870                 else if (test_bit(ST_DOFLUSHTX, &portp->state))
2871                         cmd = A_SETSIGNALSFTX;
2872                 else if (test_bit(ST_DOFLUSHRX, &portp->state))
2873                         cmd = A_SETSIGNALSFRX;
2874                 else
2875                         cmd = A_SETSIGNALS;
2876                 clear_bit(ST_DOFLUSHTX, &portp->state);
2877                 clear_bit(ST_DOFLUSHRX, &portp->state);
2878                 clear_bit(ST_DOSIGS, &portp->state);
2879                 memcpy((void *) &(cp->args[0]), (void *) &portp->asig,
2880                         sizeof(asysigs_t));
2881                 cp->status = 0;
2882                 cp->cmd = cmd;
2883                 set_bit(ST_CMDING, &portp->state);
2884         } else if (test_bit(ST_DOFLUSHTX, &portp->state) ||
2885             test_bit(ST_DOFLUSHRX, &portp->state)) {
2886                 cmd = ((test_bit(ST_DOFLUSHTX, &portp->state)) ? FLUSHTX : 0);
2887                 cmd |= ((test_bit(ST_DOFLUSHRX, &portp->state)) ? FLUSHRX : 0);
2888                 clear_bit(ST_DOFLUSHTX, &portp->state);
2889                 clear_bit(ST_DOFLUSHRX, &portp->state);
2890                 memcpy((void *) &(cp->args[0]), (void *) &cmd, sizeof(int));
2891                 cp->status = 0;
2892                 cp->cmd = A_FLUSH;
2893                 set_bit(ST_CMDING, &portp->state);
2894         }
2895 }
2896
2897 /*****************************************************************************/
2898
2899 /*
2900  *      Host command service checking. This handles commands or messages
2901  *      coming from the slave to the host. Must have board shared memory
2902  *      enabled and interrupts off when called. Notice that by servicing the
2903  *      read data last we don't need to change the shared memory pointer
2904  *      during processing (which is a slow IO operation).
2905  *      Return value indicates if this port is still awaiting actions from
2906  *      the slave (like open, command, or even TX data being sent). If 0
2907  *      then port is still busy, otherwise no longer busy.
2908  */
2909
2910 static inline int stli_hostcmd(stlibrd_t *brdp, stliport_t *portp)
2911 {
2912         volatile cdkasy_t       *ap;
2913         volatile cdkctrl_t      *cp;
2914         struct tty_struct       *tty;
2915         asynotify_t             nt;
2916         unsigned long           oldsigs;
2917         int                     rc, donerx;
2918
2919 #if DEBUG
2920         printk("stli_hostcmd(brdp=%x,channr=%d)\n", (int) brdp, channr);
2921 #endif
2922
2923         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
2924         cp = &ap->ctrl;
2925
2926 /*
2927  *      Check if we are waiting for an open completion message.
2928  */
2929         if (test_bit(ST_OPENING, &portp->state)) {
2930                 rc = (int) cp->openarg;
2931                 if ((cp->open == 0) && (rc != 0)) {
2932                         if (rc > 0)
2933                                 rc--;
2934                         cp->openarg = 0;
2935                         portp->rc = rc;
2936                         clear_bit(ST_OPENING, &portp->state);
2937                         wake_up_interruptible(&portp->raw_wait);
2938                 }
2939         }
2940
2941 /*
2942  *      Check if we are waiting for a close completion message.
2943  */
2944         if (test_bit(ST_CLOSING, &portp->state)) {
2945                 rc = (int) cp->closearg;
2946                 if ((cp->close == 0) && (rc != 0)) {
2947                         if (rc > 0)
2948                                 rc--;
2949                         cp->closearg = 0;
2950                         portp->rc = rc;
2951                         clear_bit(ST_CLOSING, &portp->state);
2952                         wake_up_interruptible(&portp->raw_wait);
2953                 }
2954         }
2955
2956 /*
2957  *      Check if we are waiting for a command completion message. We may
2958  *      need to copy out the command results associated with this command.
2959  */
2960         if (test_bit(ST_CMDING, &portp->state)) {
2961                 rc = cp->status;
2962                 if ((cp->cmd == 0) && (rc != 0)) {
2963                         if (rc > 0)
2964                                 rc--;
2965                         if (portp->argp != (void *) NULL) {
2966                                 memcpy(portp->argp, (void *) &(cp->args[0]),
2967                                         portp->argsize);
2968                                 portp->argp = (void *) NULL;
2969                         }
2970                         cp->status = 0;
2971                         portp->rc = rc;
2972                         clear_bit(ST_CMDING, &portp->state);
2973                         stli_dodelaycmd(portp, cp);
2974                         wake_up_interruptible(&portp->raw_wait);
2975                 }
2976         }
2977
2978 /*
2979  *      Check for any notification messages ready. This includes lots of
2980  *      different types of events - RX chars ready, RX break received,
2981  *      TX data low or empty in the slave, modem signals changed state.
2982  */
2983         donerx = 0;
2984
2985         if (ap->notify) {
2986                 nt = ap->changed;
2987                 ap->notify = 0;
2988                 tty = portp->tty;
2989
2990                 if (nt.signal & SG_DCD) {
2991                         oldsigs = portp->sigs;
2992                         portp->sigs = stli_mktiocm(nt.sigvalue);
2993                         clear_bit(ST_GETSIGS, &portp->state);
2994                         if ((portp->sigs & TIOCM_CD) &&
2995                             ((oldsigs & TIOCM_CD) == 0))
2996                                 wake_up_interruptible(&portp->open_wait);
2997                         if ((oldsigs & TIOCM_CD) &&
2998                             ((portp->sigs & TIOCM_CD) == 0)) {
2999                                 if (portp->flags & ASYNC_CHECK_CD) {
3000                                         if (! ((portp->flags & ASYNC_CALLOUT_ACTIVE) &&
3001                                             (portp->flags & ASYNC_CALLOUT_NOHUP))) {
3002                                                 if (tty != (struct tty_struct *) NULL)
3003                                                         queue_task(&portp->tqhangup, &tq_scheduler);
3004                                         }
3005                                 }
3006                         }
3007                 }
3008
3009                 if (nt.data & DT_TXEMPTY)
3010                         clear_bit(ST_TXBUSY, &portp->state);
3011                 if (nt.data & (DT_TXEMPTY | DT_TXLOW)) {
3012                         if (tty != (struct tty_struct *) NULL) {
3013                                 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
3014                                     tty->ldisc.write_wakeup) {
3015                                         (tty->ldisc.write_wakeup)(tty);
3016                                         EBRDENABLE(brdp);
3017                                 }
3018                                 wake_up_interruptible(&tty->write_wait);
3019                         }
3020                 }
3021
3022                 if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
3023                         if (tty != (struct tty_struct *) NULL) {
3024                                 if (tty->flip.count < TTY_FLIPBUF_SIZE) {
3025                                         tty->flip.count++;
3026                                         *tty->flip.flag_buf_ptr++ = TTY_BREAK;
3027                                         *tty->flip.char_buf_ptr++ = 0;
3028                                         if (portp->flags & ASYNC_SAK) {
3029                                                 do_SAK(tty);
3030                                                 EBRDENABLE(brdp);
3031                                         }
3032                                         tty_schedule_flip(tty);
3033                                 }
3034                         }
3035                 }
3036
3037                 if (nt.data & DT_RXBUSY) {
3038                         donerx++;
3039                         stli_read(brdp, portp);
3040                 }
3041         }
3042
3043 /*
3044  *      It might seem odd that we are checking for more RX chars here.
3045  *      But, we need to handle the case where the tty buffer was previously
3046  *      filled, but we had more characters to pass up. The slave will not
3047  *      send any more RX notify messages until the RX buffer has been emptied.
3048  *      But it will leave the service bits on (since the buffer is not empty).
3049  *      So from here we can try to process more RX chars.
3050  */
3051         if ((!donerx) && test_bit(ST_RXING, &portp->state)) {
3052                 clear_bit(ST_RXING, &portp->state);
3053                 stli_read(brdp, portp);
3054         }
3055
3056         return((test_bit(ST_OPENING, &portp->state) ||
3057                 test_bit(ST_CLOSING, &portp->state) ||
3058                 test_bit(ST_CMDING, &portp->state) ||
3059                 test_bit(ST_TXBUSY, &portp->state) ||
3060                 test_bit(ST_RXING, &portp->state)) ? 0 : 1);
3061 }
3062
3063 /*****************************************************************************/
3064
3065 /*
3066  *      Service all ports on a particular board. Assumes that the boards
3067  *      shared memory is enabled, and that the page pointer is pointed
3068  *      at the cdk header structure.
3069  */
3070
3071 static inline void stli_brdpoll(stlibrd_t *brdp, volatile cdkhdr_t *hdrp)
3072 {
3073         stliport_t      *portp;
3074         unsigned char   hostbits[(STL_MAXCHANS / 8) + 1];
3075         unsigned char   slavebits[(STL_MAXCHANS / 8) + 1];
3076         unsigned char   *slavep;
3077         int             bitpos, bitat, bitsize;
3078         int             channr, nrdevs, slavebitchange;
3079
3080         bitsize = brdp->bitsize;
3081         nrdevs = brdp->nrdevs;
3082
3083 /*
3084  *      Check if slave wants any service. Basically we try to do as
3085  *      little work as possible here. There are 2 levels of service
3086  *      bits. So if there is nothing to do we bail early. We check
3087  *      8 service bits at a time in the inner loop, so we can bypass
3088  *      the lot if none of them want service.
3089  */
3090         memcpy(&hostbits[0], (((unsigned char *) hdrp) + brdp->hostoffset),
3091                 bitsize);
3092
3093         memset(&slavebits[0], 0, bitsize);
3094         slavebitchange = 0;
3095
3096         for (bitpos = 0; (bitpos < bitsize); bitpos++) {
3097                 if (hostbits[bitpos] == 0)
3098                         continue;
3099                 channr = bitpos * 8;
3100                 for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
3101                         if (hostbits[bitpos] & bitat) {
3102                                 portp = brdp->ports[(channr - 1)];
3103                                 if (stli_hostcmd(brdp, portp)) {
3104                                         slavebitchange++;
3105                                         slavebits[bitpos] |= bitat;
3106                                 }
3107                         }
3108                 }
3109         }
3110
3111 /*
3112  *      If any of the ports are no longer busy then update them in the
3113  *      slave request bits. We need to do this after, since a host port
3114  *      service may initiate more slave requests.
3115  */
3116         if (slavebitchange) {
3117                 hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
3118                 slavep = ((unsigned char *) hdrp) + brdp->slaveoffset;
3119                 for (bitpos = 0; (bitpos < bitsize); bitpos++) {
3120                         if (slavebits[bitpos])
3121                                 slavep[bitpos] &= ~slavebits[bitpos];
3122                 }
3123         }
3124 }
3125
3126 /*****************************************************************************/
3127
3128 /*
3129  *      Driver poll routine. This routine polls the boards in use and passes
3130  *      messages back up to host when necessary. This is actually very
3131  *      CPU efficient, since we will always have the kernel poll clock, it
3132  *      adds only a few cycles when idle (since board service can be
3133  *      determined very easily), but when loaded generates no interrupts
3134  *      (with their expensive associated context change).
3135  */
3136
3137 static void stli_poll(unsigned long arg)
3138 {
3139         volatile cdkhdr_t       *hdrp;
3140         stlibrd_t               *brdp;
3141         int                     brdnr;
3142
3143         stli_timerlist.expires = STLI_TIMEOUT;
3144         add_timer(&stli_timerlist);
3145
3146 /*
3147  *      Check each board and do any servicing required.
3148  */
3149         for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
3150                 brdp = stli_brds[brdnr];
3151                 if (brdp == (stlibrd_t *) NULL)
3152                         continue;
3153                 if ((brdp->state & BST_STARTED) == 0)
3154                         continue;
3155
3156                 EBRDENABLE(brdp);
3157                 hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
3158                 if (hdrp->hostreq)
3159                         stli_brdpoll(brdp, hdrp);
3160                 EBRDDISABLE(brdp);
3161         }
3162 }
3163
3164 /*****************************************************************************/
3165
3166 /*
3167  *      Translate the termios settings into the port setting structure of
3168  *      the slave.
3169  */
3170
3171 static void stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp)
3172 {
3173 #if DEBUG
3174         printk("stli_mkasyport(portp=%x,pp=%x,tiosp=%d)\n",
3175                 (int) portp, (int) pp, (int) tiosp);
3176 #endif
3177
3178         memset(pp, 0, sizeof(asyport_t));
3179
3180 /*
3181  *      Start of by setting the baud, char size, parity and stop bit info.
3182  */
3183         pp->baudout = tiosp->c_cflag & CBAUD;
3184         if (pp->baudout & CBAUDEX) {
3185                 pp->baudout &= ~CBAUDEX;
3186                 if ((pp->baudout < 1) || (pp->baudout > 4))
3187                         tiosp->c_cflag &= ~CBAUDEX;
3188                 else
3189                         pp->baudout += 15;
3190         }
3191         pp->baudout = stli_baudrates[pp->baudout];
3192         if ((tiosp->c_cflag & CBAUD) == B38400) {
3193                 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3194                         pp->baudout = 57600;
3195                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3196                         pp->baudout = 115200;
3197                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3198                         pp->baudout = 230400;
3199                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3200                         pp->baudout = 460800;
3201                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3202                         pp->baudout = (portp->baud_base / portp->custom_divisor);
3203         }
3204         if (pp->baudout > STL_MAXBAUD)
3205                 pp->baudout = STL_MAXBAUD;
3206         pp->baudin = pp->baudout;
3207
3208         switch (tiosp->c_cflag & CSIZE) {
3209         case CS5:
3210                 pp->csize = 5;
3211                 break;
3212         case CS6:
3213                 pp->csize = 6;
3214                 break;
3215         case CS7:
3216                 pp->csize = 7;
3217                 break;
3218         default:
3219                 pp->csize = 8;
3220                 break;
3221         }
3222
3223         if (tiosp->c_cflag & CSTOPB)
3224                 pp->stopbs = PT_STOP2;
3225         else
3226                 pp->stopbs = PT_STOP1;
3227
3228         if (tiosp->c_cflag & PARENB) {
3229                 if (tiosp->c_cflag & PARODD)
3230                         pp->parity = PT_ODDPARITY;
3231                 else
3232                         pp->parity = PT_EVENPARITY;
3233         } else {
3234                 pp->parity = PT_NOPARITY;
3235         }
3236
3237 /*
3238  *      Set up any flow control options enabled.
3239  */
3240         if (tiosp->c_iflag & IXON) {
3241                 pp->flow |= F_IXON;
3242                 if (tiosp->c_iflag & IXANY)
3243                         pp->flow |= F_IXANY;
3244         }
3245         if (tiosp->c_cflag & CRTSCTS)
3246                 pp->flow |= (F_RTSFLOW | F_CTSFLOW);
3247
3248         pp->startin = tiosp->c_cc[VSTART];
3249         pp->stopin = tiosp->c_cc[VSTOP];
3250         pp->startout = tiosp->c_cc[VSTART];
3251         pp->stopout = tiosp->c_cc[VSTOP];
3252
3253 /*
3254  *      Set up the RX char marking mask with those RX error types we must
3255  *      catch. We can get the slave to help us out a little here, it will
3256  *      ignore parity errors and breaks for us, and mark parity errors in
3257  *      the data stream.
3258  */
3259         if (tiosp->c_iflag & IGNPAR)
3260                 pp->iflag |= FI_IGNRXERRS;
3261         if (tiosp->c_iflag & IGNBRK)
3262                 pp->iflag |= FI_IGNBREAK;
3263
3264         portp->rxmarkmsk = 0;
3265         if (tiosp->c_iflag & (INPCK | PARMRK))
3266                 pp->iflag |= FI_1MARKRXERRS;
3267         if (tiosp->c_iflag & BRKINT)
3268                 portp->rxmarkmsk |= BRKINT;
3269
3270 /*
3271  *      Set up clocal processing as required.
3272  */
3273         if (tiosp->c_cflag & CLOCAL)
3274                 portp->flags &= ~ASYNC_CHECK_CD;
3275         else
3276                 portp->flags |= ASYNC_CHECK_CD;
3277
3278 /*
3279  *      Transfer any persistent flags into the asyport structure.
3280  */
3281         pp->pflag = (portp->pflag & 0xffff);
3282         pp->vmin = (portp->pflag & P_RXIMIN) ? 1 : 0;
3283         pp->vtime = (portp->pflag & P_RXITIME) ? 1 : 0;
3284         pp->cc[1] = (portp->pflag & P_RXTHOLD) ? 1 : 0;
3285 }
3286
3287 /*****************************************************************************/
3288
3289 /*
3290  *      Construct a slave signals structure for setting the DTR and RTS
3291  *      signals as specified.
3292  */
3293
3294 static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts)
3295 {
3296 #if DEBUG
3297         printk("stli_mkasysigs(sp=%x,dtr=%d,rts=%d)\n", (int) sp, dtr, rts);
3298 #endif
3299
3300         memset(sp, 0, sizeof(asysigs_t));
3301         if (dtr >= 0) {
3302                 sp->signal |= SG_DTR;
3303                 sp->sigvalue |= ((dtr > 0) ? SG_DTR : 0);
3304         }
3305         if (rts >= 0) {
3306                 sp->signal |= SG_RTS;
3307                 sp->sigvalue |= ((rts > 0) ? SG_RTS : 0);
3308         }
3309 }
3310
3311 /*****************************************************************************/
3312
3313 /*
3314  *      Convert the signals returned from the slave into a local TIOCM type
3315  *      signals value. We keep them locally in TIOCM format.
3316  */
3317
3318 static long stli_mktiocm(unsigned long sigvalue)
3319 {
3320         long    tiocm;
3321
3322 #if DEBUG
3323         printk("stli_mktiocm(sigvalue=%x)\n", (int) sigvalue);
3324 #endif
3325
3326         tiocm = 0;
3327         tiocm |= ((sigvalue & SG_DCD) ? TIOCM_CD : 0);
3328         tiocm |= ((sigvalue & SG_CTS) ? TIOCM_CTS : 0);
3329         tiocm |= ((sigvalue & SG_RI) ? TIOCM_RI : 0);
3330         tiocm |= ((sigvalue & SG_DSR) ? TIOCM_DSR : 0);
3331         tiocm |= ((sigvalue & SG_DTR) ? TIOCM_DTR : 0);
3332         tiocm |= ((sigvalue & SG_RTS) ? TIOCM_RTS : 0);
3333         return(tiocm);
3334 }
3335
3336 /*****************************************************************************/
3337
3338 /*
3339  *      All panels and ports actually attached have been worked out. All
3340  *      we need to do here is set up the appropriate per port data structures.
3341  */
3342
3343 static inline int stli_initports(stlibrd_t *brdp)
3344 {
3345         stliport_t      *portp;
3346         int             i, panelnr, panelport;
3347
3348 #if DEBUG
3349         printk("stli_initports(brdp=%x)\n", (int) brdp);
3350 #endif
3351
3352         for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
3353                 portp = (stliport_t *) stli_memalloc(sizeof(stliport_t));
3354                 if (portp == (stliport_t *) NULL) {
3355                         printk("STALLION: failed to allocate port structure\n");
3356                         continue;
3357                 }
3358
3359                 memset(portp, 0, sizeof(stliport_t));
3360                 portp->magic = STLI_PORTMAGIC;
3361                 portp->portnr = i;
3362                 portp->brdnr = brdp->brdnr;
3363                 portp->panelnr = panelnr;
3364                 portp->baud_base = STL_BAUDBASE;
3365                 portp->close_delay = STL_CLOSEDELAY;
3366                 portp->closing_wait = 30 * HZ;
3367                 portp->tqhangup.routine = stli_dohangup;
3368                 portp->tqhangup.data = portp;
3369                 init_waitqueue_head(&portp->open_wait);
3370                 init_waitqueue_head(&portp->close_wait);
3371                 init_waitqueue_head(&portp->raw_wait);
3372                 portp->normaltermios = stli_deftermios;
3373                 portp->callouttermios = stli_deftermios;
3374                 panelport++;
3375                 if (panelport >= brdp->panels[panelnr]) {
3376                         panelport = 0;
3377                         panelnr++;
3378                 }
3379                 brdp->ports[i] = portp;
3380         }
3381
3382         return(0);
3383 }
3384
3385 /*****************************************************************************/
3386
3387 /*
3388  *      All the following routines are board specific hardware operations.
3389  */
3390
3391 static void stli_ecpinit(stlibrd_t *brdp)
3392 {
3393         unsigned long   memconf;
3394
3395 #if DEBUG
3396         printk("stli_ecpinit(brdp=%d)\n", (int) brdp);
3397 #endif
3398
3399         outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
3400         udelay(10);
3401         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
3402         udelay(100);
3403
3404         memconf = (brdp->memaddr & ECP_ATADDRMASK) >> ECP_ATADDRSHFT;
3405         outb(memconf, (brdp->iobase + ECP_ATMEMAR));
3406 }
3407
3408 /*****************************************************************************/
3409
3410 static void stli_ecpenable(stlibrd_t *brdp)
3411 {
3412 #if DEBUG
3413         printk("stli_ecpenable(brdp=%x)\n", (int) brdp);
3414 #endif
3415         outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
3416 }
3417
3418 /*****************************************************************************/
3419
3420 static void stli_ecpdisable(stlibrd_t *brdp)
3421 {
3422 #if DEBUG
3423         printk("stli_ecpdisable(brdp=%x)\n", (int) brdp);
3424 #endif
3425         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
3426 }
3427
3428 /*****************************************************************************/
3429
3430 static char *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3431 {
3432         void            *ptr;
3433         unsigned char   val;
3434
3435 #if DEBUG
3436         printk("stli_ecpgetmemptr(brdp=%x,offset=%x)\n", (int) brdp,
3437                 (int) offset);
3438 #endif
3439
3440         if (offset > brdp->memsize) {
3441                 printk("STALLION: shared memory pointer=%x out of range at "
3442                         "line=%d(%d), brd=%d\n", (int) offset, line,
3443                         __LINE__, brdp->brdnr);
3444                 ptr = 0;
3445                 val = 0;
3446         } else {
3447                 ptr = brdp->membase + (offset % ECP_ATPAGESIZE);
3448                 val = (unsigned char) (offset / ECP_ATPAGESIZE);
3449         }
3450         outb(val, (brdp->iobase + ECP_ATMEMPR));
3451         return(ptr);
3452 }
3453
3454 /*****************************************************************************/
3455
3456 static void stli_ecpreset(stlibrd_t *brdp)
3457 {
3458 #if DEBUG
3459         printk("stli_ecpreset(brdp=%x)\n", (int) brdp);
3460 #endif
3461
3462         outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
3463         udelay(10);
3464         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
3465         udelay(500);
3466 }
3467
3468 /*****************************************************************************/
3469
3470 static void stli_ecpintr(stlibrd_t *brdp)
3471 {
3472 #if DEBUG
3473         printk("stli_ecpintr(brdp=%x)\n", (int) brdp);
3474 #endif
3475         outb(0x1, brdp->iobase);
3476 }
3477
3478 /*****************************************************************************/
3479
3480 /*
3481  *      The following set of functions act on ECP EISA boards.
3482  */
3483
3484 static void stli_ecpeiinit(stlibrd_t *brdp)
3485 {
3486         unsigned long   memconf;
3487
3488 #if DEBUG
3489         printk("stli_ecpeiinit(brdp=%x)\n", (int) brdp);
3490 #endif
3491
3492         outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
3493         outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
3494         udelay(10);
3495         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3496         udelay(500);
3497
3498         memconf = (brdp->memaddr & ECP_EIADDRMASKL) >> ECP_EIADDRSHFTL;
3499         outb(memconf, (brdp->iobase + ECP_EIMEMARL));
3500         memconf = (brdp->memaddr & ECP_EIADDRMASKH) >> ECP_EIADDRSHFTH;
3501         outb(memconf, (brdp->iobase + ECP_EIMEMARH));
3502 }
3503
3504 /*****************************************************************************/
3505
3506 static void stli_ecpeienable(stlibrd_t *brdp)
3507 {
3508         outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
3509 }
3510
3511 /*****************************************************************************/
3512
3513 static void stli_ecpeidisable(stlibrd_t *brdp)
3514 {
3515         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3516 }
3517
3518 /*****************************************************************************/
3519
3520 static char *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3521 {
3522         void            *ptr;
3523         unsigned char   val;
3524
3525 #if DEBUG
3526         printk("stli_ecpeigetmemptr(brdp=%x,offset=%x,line=%d)\n",
3527                 (int) brdp, (int) offset, line);
3528 #endif
3529
3530         if (offset > brdp->memsize) {
3531                 printk("STALLION: shared memory pointer=%x out of range at "
3532                         "line=%d(%d), brd=%d\n", (int) offset, line,
3533                         __LINE__, brdp->brdnr);
3534                 ptr = 0;
3535                 val = 0;
3536         } else {
3537                 ptr = brdp->membase + (offset % ECP_EIPAGESIZE);
3538                 if (offset < ECP_EIPAGESIZE)
3539                         val = ECP_EIENABLE;
3540                 else
3541                         val = ECP_EIENABLE | 0x40;
3542         }
3543         outb(val, (brdp->iobase + ECP_EICONFR));
3544         return(ptr);
3545 }
3546
3547 /*****************************************************************************/
3548
3549 static void stli_ecpeireset(stlibrd_t *brdp)
3550 {
3551         outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
3552         udelay(10);
3553         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3554         udelay(500);
3555 }
3556
3557 /*****************************************************************************/
3558
3559 /*
3560  *      The following set of functions act on ECP MCA boards.
3561  */
3562
3563 static void stli_ecpmcenable(stlibrd_t *brdp)
3564 {
3565         outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
3566 }
3567
3568 /*****************************************************************************/
3569
3570 static void stli_ecpmcdisable(stlibrd_t *brdp)
3571 {
3572         outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
3573 }
3574
3575 /*****************************************************************************/
3576
3577 static char *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3578 {
3579         void            *ptr;
3580         unsigned char   val;
3581
3582         if (offset > brdp->memsize) {
3583                 printk("STALLION: shared memory pointer=%x out of range at "
3584                         "line=%d(%d), brd=%d\n", (int) offset, line,
3585                         __LINE__, brdp->brdnr);
3586                 ptr = 0;
3587                 val = 0;
3588         } else {
3589                 ptr = brdp->membase + (offset % ECP_MCPAGESIZE);
3590                 val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE;
3591         }
3592         outb(val, (brdp->iobase + ECP_MCCONFR));
3593         return(ptr);
3594 }
3595
3596 /*****************************************************************************/
3597
3598 static void stli_ecpmcreset(stlibrd_t *brdp)
3599 {
3600         outb(ECP_MCSTOP, (brdp->iobase + ECP_MCCONFR));
3601         udelay(10);
3602         outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
3603         udelay(500);
3604 }
3605
3606 /*****************************************************************************/
3607
3608 /*
3609  *      The following set of functions act on ECP PCI boards.
3610  */
3611
3612 static void stli_ecppciinit(stlibrd_t *brdp)
3613 {
3614 #if DEBUG
3615         printk("stli_ecppciinit(brdp=%x)\n", (int) brdp);
3616 #endif
3617
3618         outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
3619         udelay(10);
3620         outb(0, (brdp->iobase + ECP_PCICONFR));
3621         udelay(500);
3622 }
3623
3624 /*****************************************************************************/
3625
3626 static char *stli_ecppcigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3627 {
3628         void            *ptr;
3629         unsigned char   val;
3630
3631 #if DEBUG
3632         printk("stli_ecppcigetmemptr(brdp=%x,offset=%x,line=%d)\n",
3633                 (int) brdp, (int) offset, line);
3634 #endif
3635
3636         if (offset > brdp->memsize) {
3637                 printk("STALLION: shared memory pointer=%x out of range at "
3638                         "line=%d(%d), board=%d\n", (int) offset, line,
3639                         __LINE__, brdp->brdnr);
3640                 ptr = 0;
3641                 val = 0;
3642         } else {
3643                 ptr = brdp->membase + (offset % ECP_PCIPAGESIZE);
3644                 val = (offset / ECP_PCIPAGESIZE) << 1;
3645         }
3646         outb(val, (brdp->iobase + ECP_PCICONFR));
3647         return(ptr);
3648 }
3649
3650 /*****************************************************************************/
3651
3652 static void stli_ecppcireset(stlibrd_t *brdp)
3653 {
3654         outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
3655         udelay(10);
3656         outb(0, (brdp->iobase + ECP_PCICONFR));
3657         udelay(500);
3658 }
3659
3660 /*****************************************************************************/
3661
3662 /*
3663  *      The following routines act on ONboards.
3664  */
3665
3666 static void stli_onbinit(stlibrd_t *brdp)
3667 {
3668         unsigned long   memconf;
3669
3670 #if DEBUG
3671         printk("stli_onbinit(brdp=%d)\n", (int) brdp);
3672 #endif
3673
3674         outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3675         udelay(10);
3676         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3677         mdelay(1000);
3678
3679         memconf = (brdp->memaddr & ONB_ATADDRMASK) >> ONB_ATADDRSHFT;
3680         outb(memconf, (brdp->iobase + ONB_ATMEMAR));
3681         outb(0x1, brdp->iobase);
3682         mdelay(1);
3683 }
3684
3685 /*****************************************************************************/
3686
3687 static void stli_onbenable(stlibrd_t *brdp)
3688 {
3689 #if DEBUG
3690         printk("stli_onbenable(brdp=%x)\n", (int) brdp);
3691 #endif
3692         outb((brdp->enabval | ONB_ATENABLE), (brdp->iobase + ONB_ATCONFR));
3693 }
3694
3695 /*****************************************************************************/
3696
3697 static void stli_onbdisable(stlibrd_t *brdp)
3698 {
3699 #if DEBUG
3700         printk("stli_onbdisable(brdp=%x)\n", (int) brdp);
3701 #endif
3702         outb((brdp->enabval | ONB_ATDISABLE), (brdp->iobase + ONB_ATCONFR));
3703 }
3704
3705 /*****************************************************************************/
3706
3707 static char *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3708 {
3709         void    *ptr;
3710
3711 #if DEBUG
3712         printk("stli_onbgetmemptr(brdp=%x,offset=%x)\n", (int) brdp,
3713                 (int) offset);
3714 #endif
3715
3716         if (offset > brdp->memsize) {
3717                 printk("STALLION: shared memory pointer=%x out of range at "
3718                         "line=%d(%d), brd=%d\n", (int) offset, line,
3719                         __LINE__, brdp->brdnr);
3720                 ptr = 0;
3721         } else {
3722                 ptr = brdp->membase + (offset % ONB_ATPAGESIZE);
3723         }
3724         return(ptr);
3725 }
3726
3727 /*****************************************************************************/
3728
3729 static void stli_onbreset(stlibrd_t *brdp)
3730 {
3731
3732 #if DEBUG
3733         printk("stli_onbreset(brdp=%x)\n", (int) brdp);
3734 #endif
3735
3736         outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3737         udelay(10);
3738         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3739         mdelay(1000);
3740 }
3741
3742 /*****************************************************************************/
3743
3744 /*
3745  *      The following routines act on ONboard EISA.
3746  */
3747
3748 static void stli_onbeinit(stlibrd_t *brdp)
3749 {
3750         unsigned long   memconf;
3751
3752 #if DEBUG
3753         printk("stli_onbeinit(brdp=%d)\n", (int) brdp);
3754 #endif
3755
3756         outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
3757         outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3758         udelay(10);
3759         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3760         mdelay(1000);
3761
3762         memconf = (brdp->memaddr & ONB_EIADDRMASKL) >> ONB_EIADDRSHFTL;
3763         outb(memconf, (brdp->iobase + ONB_EIMEMARL));
3764         memconf = (brdp->memaddr & ONB_EIADDRMASKH) >> ONB_EIADDRSHFTH;
3765         outb(memconf, (brdp->iobase + ONB_EIMEMARH));
3766         outb(0x1, brdp->iobase);
3767         mdelay(1);
3768 }
3769
3770 /*****************************************************************************/
3771
3772 static void stli_onbeenable(stlibrd_t *brdp)
3773 {
3774 #if DEBUG
3775         printk("stli_onbeenable(brdp=%x)\n", (int) brdp);
3776 #endif
3777         outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
3778 }
3779
3780 /*****************************************************************************/
3781
3782 static void stli_onbedisable(stlibrd_t *brdp)
3783 {
3784 #if DEBUG
3785         printk("stli_onbedisable(brdp=%x)\n", (int) brdp);
3786 #endif
3787         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3788 }
3789
3790 /*****************************************************************************/
3791
3792 static char *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3793 {
3794         void            *ptr;
3795         unsigned char   val;
3796
3797 #if DEBUG
3798         printk("stli_onbegetmemptr(brdp=%x,offset=%x,line=%d)\n",
3799                 (int) brdp, (int) offset, line);
3800 #endif
3801
3802         if (offset > brdp->memsize) {
3803                 printk("STALLION: shared memory pointer=%x out of range at "
3804                         "line=%d(%d), brd=%d\n", (int) offset, line,
3805                         __LINE__, brdp->brdnr);
3806                 ptr = 0;
3807                 val = 0;
3808         } else {
3809                 ptr = brdp->membase + (offset % ONB_EIPAGESIZE);
3810                 if (offset < ONB_EIPAGESIZE)
3811                         val = ONB_EIENABLE;
3812                 else
3813                         val = ONB_EIENABLE | 0x40;
3814         }
3815         outb(val, (brdp->iobase + ONB_EICONFR));
3816         return(ptr);
3817 }
3818
3819 /*****************************************************************************/
3820
3821 static void stli_onbereset(stlibrd_t *brdp)
3822 {
3823
3824 #if DEBUG
3825         printk("stli_onbereset(brdp=%x)\n", (int) brdp);
3826 #endif
3827
3828         outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3829         udelay(10);
3830         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3831         mdelay(1000);
3832 }
3833
3834 /*****************************************************************************/
3835
3836 /*
3837  *      The following routines act on Brumby boards.
3838  */
3839
3840 static void stli_bbyinit(stlibrd_t *brdp)
3841 {
3842
3843 #if DEBUG
3844         printk("stli_bbyinit(brdp=%d)\n", (int) brdp);
3845 #endif
3846
3847         outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3848         udelay(10);
3849         outb(0, (brdp->iobase + BBY_ATCONFR));
3850         mdelay(1000);
3851         outb(0x1, brdp->iobase);
3852         mdelay(1);
3853 }
3854
3855 /*****************************************************************************/
3856
3857 static char *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3858 {
3859         void            *ptr;
3860         unsigned char   val;
3861
3862 #if DEBUG
3863         printk("stli_bbygetmemptr(brdp=%x,offset=%x)\n", (int) brdp,
3864                 (int) offset);
3865 #endif
3866
3867         if (offset > brdp->memsize) {
3868                 printk("STALLION: shared memory pointer=%x out of range at "
3869                         "line=%d(%d), brd=%d\n", (int) offset, line,
3870                         __LINE__, brdp->brdnr);
3871                 ptr = 0;
3872                 val = 0;
3873         } else {
3874                 ptr = brdp->membase + (offset % BBY_PAGESIZE);
3875                 val = (unsigned char) (offset / BBY_PAGESIZE);
3876         }
3877         outb(val, (brdp->iobase + BBY_ATCONFR));
3878         return(ptr);
3879 }
3880
3881 /*****************************************************************************/
3882
3883 static void stli_bbyreset(stlibrd_t *brdp)
3884 {
3885
3886 #if DEBUG
3887         printk("stli_bbyreset(brdp=%x)\n", (int) brdp);
3888 #endif
3889
3890         outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3891         udelay(10);
3892         outb(0, (brdp->iobase + BBY_ATCONFR));
3893         mdelay(1000);
3894 }
3895
3896 /*****************************************************************************/
3897
3898 /*
3899  *      The following routines act on original old Stallion boards.
3900  */
3901
3902 static void stli_stalinit(stlibrd_t *brdp)
3903 {
3904
3905 #if DEBUG
3906         printk("stli_stalinit(brdp=%d)\n", (int) brdp);
3907 #endif
3908
3909         outb(0x1, brdp->iobase);
3910         mdelay(1000);
3911 }
3912
3913 /*****************************************************************************/
3914
3915 static char *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
3916 {
3917         void    *ptr;
3918
3919 #if DEBUG
3920         printk("stli_stalgetmemptr(brdp=%x,offset=%x)\n", (int) brdp,
3921                 (int) offset);
3922 #endif
3923
3924         if (offset > brdp->memsize) {
3925                 printk("STALLION: shared memory pointer=%x out of range at "
3926                         "line=%d(%d), brd=%d\n", (int) offset, line,
3927                         __LINE__, brdp->brdnr);
3928                 ptr = 0;
3929         } else {
3930                 ptr = brdp->membase + (offset % STAL_PAGESIZE);
3931         }
3932         return(ptr);
3933 }
3934
3935 /*****************************************************************************/
3936
3937 static void stli_stalreset(stlibrd_t *brdp)
3938 {
3939         volatile unsigned long  *vecp;
3940
3941 #if DEBUG
3942         printk("stli_stalreset(brdp=%x)\n", (int) brdp);
3943 #endif
3944
3945         vecp = (volatile unsigned long *) (brdp->membase + 0x30);
3946         *vecp = 0xffff0000;
3947         outb(0, brdp->iobase);
3948         mdelay(1000);
3949 }
3950
3951 /*****************************************************************************/
3952
3953 /*
3954  *      Try to find an ECP board and initialize it. This handles only ECP
3955  *      board types.
3956  */
3957
3958 static inline int stli_initecp(stlibrd_t *brdp)
3959 {
3960         cdkecpsig_t     sig;
3961         cdkecpsig_t     *sigsp;
3962         unsigned int    status, nxtid;
3963         char            *name;
3964         int             panelnr, nrports;
3965
3966 #if DEBUG
3967         printk("stli_initecp(brdp=%x)\n", (int) brdp);
3968 #endif
3969
3970 /*
3971  *      Do a basic sanity check on the IO and memory addresses.
3972  */
3973         if ((brdp->iobase == 0) || (brdp->memaddr == 0))
3974                 return(-ENODEV);
3975
3976         brdp->iosize = ECP_IOSIZE;
3977         if (check_region(brdp->iobase, brdp->iosize))
3978                 printk("STALLION: Warning, board %d I/O address %x conflicts "
3979                         "with another device\n", brdp->brdnr, brdp->iobase);
3980
3981 /*
3982  *      Based on the specific board type setup the common vars to access
3983  *      and enable shared memory. Set all board specific information now
3984  *      as well.
3985  */
3986         switch (brdp->brdtype) {
3987         case BRD_ECP:
3988                 brdp->membase = (void *) brdp->memaddr;
3989                 brdp->memsize = ECP_MEMSIZE;
3990                 brdp->pagesize = ECP_ATPAGESIZE;
3991                 brdp->init = stli_ecpinit;
3992                 brdp->enable = stli_ecpenable;
3993                 brdp->reenable = stli_ecpenable;
3994                 brdp->disable = stli_ecpdisable;
3995                 brdp->getmemptr = stli_ecpgetmemptr;
3996                 brdp->intr = stli_ecpintr;
3997                 brdp->reset = stli_ecpreset;
3998                 name = "serial(EC8/64)";
3999                 break;
4000
4001         case BRD_ECPE:
4002                 brdp->membase = (void *) brdp->memaddr;
4003                 brdp->memsize = ECP_MEMSIZE;
4004                 brdp->pagesize = ECP_EIPAGESIZE;
4005                 brdp->init = stli_ecpeiinit;
4006                 brdp->enable = stli_ecpeienable;
4007                 brdp->reenable = stli_ecpeienable;
4008                 brdp->disable = stli_ecpeidisable;
4009                 brdp->getmemptr = stli_ecpeigetmemptr;
4010                 brdp->intr = stli_ecpintr;
4011                 brdp->reset = stli_ecpeireset;
4012                 name = "serial(EC8/64-EI)";
4013                 break;
4014
4015         case BRD_ECPMC:
4016                 brdp->membase = (void *) brdp->memaddr;
4017                 brdp->memsize = ECP_MEMSIZE;
4018                 brdp->pagesize = ECP_MCPAGESIZE;
4019                 brdp->init = NULL;
4020                 brdp->enable = stli_ecpmcenable;
4021                 brdp->reenable = stli_ecpmcenable;
4022                 brdp->disable = stli_ecpmcdisable;
4023                 brdp->getmemptr = stli_ecpmcgetmemptr;
4024                 brdp->intr = stli_ecpintr;
4025                 brdp->reset = stli_ecpmcreset;
4026                 name = "serial(EC8/64-MCA)";
4027                 break;
4028
4029         case BRD_ECPPCI:
4030                 brdp->membase = (void *) brdp->memaddr;
4031                 brdp->memsize = ECP_PCIMEMSIZE;
4032                 brdp->pagesize = ECP_PCIPAGESIZE;
4033                 brdp->init = stli_ecppciinit;
4034                 brdp->enable = NULL;
4035                 brdp->reenable = NULL;
4036                 brdp->disable = NULL;
4037                 brdp->getmemptr = stli_ecppcigetmemptr;
4038                 brdp->intr = stli_ecpintr;
4039                 brdp->reset = stli_ecppcireset;
4040                 name = "serial(EC/RA-PCI)";
4041                 break;
4042
4043         default:
4044                 return(-EINVAL);
4045         }
4046
4047 /*
4048  *      The per-board operations structure is all set up, so now let's go
4049  *      and get the board operational. Firstly initialize board configuration
4050  *      registers. Set the memory mapping info so we can get at the boards
4051  *      shared memory.
4052  */
4053         EBRDINIT(brdp);
4054
4055         brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
4056         if (brdp->membase == (void *) NULL)
4057                 return(-ENOMEM);
4058
4059 /*
4060  *      Now that all specific code is set up, enable the shared memory and
4061  *      look for the a signature area that will tell us exactly what board
4062  *      this is, and what it is connected to it.
4063  */
4064         EBRDENABLE(brdp);
4065         sigsp = (cdkecpsig_t *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
4066         memcpy(&sig, sigsp, sizeof(cdkecpsig_t));
4067         EBRDDISABLE(brdp);
4068
4069 #if 0
4070         printk("%s(%d): sig-> magic=%x rom=%x panel=%x,%x,%x,%x,%x,%x,%x,%x\n",
4071                 __FILE__, __LINE__, (int) sig.magic, sig.romver, sig.panelid[0],
4072                 (int) sig.panelid[1], (int) sig.panelid[2],
4073                 (int) sig.panelid[3], (int) sig.panelid[4],
4074                 (int) sig.panelid[5], (int) sig.panelid[6],
4075                 (int) sig.panelid[7]);
4076 #endif
4077
4078         if (sig.magic != ECP_MAGIC)
4079                 return(-ENODEV);
4080
4081 /*
4082  *      Scan through the signature looking at the panels connected to the
4083  *      board. Calculate the total number of ports as we go.
4084  */
4085         for (panelnr = 0, nxtid = 0; (panelnr < STL_MAXPANELS); panelnr++) {
4086                 status = sig.panelid[nxtid];
4087                 if ((status & ECH_PNLIDMASK) != nxtid)
4088                         break;
4089
4090                 brdp->panelids[panelnr] = status;
4091                 nrports = (status & ECH_PNL16PORT) ? 16 : 8;
4092                 if ((nrports == 16) && ((status & ECH_PNLXPID) == 0))
4093                         nxtid++;
4094                 brdp->panels[panelnr] = nrports;
4095                 brdp->nrports += nrports;
4096                 nxtid++;
4097                 brdp->nrpanels++;
4098         }
4099
4100         request_region(brdp->iobase, brdp->iosize, name);
4101         brdp->state |= BST_FOUND;
4102         return(0);
4103 }
4104
4105 /*****************************************************************************/
4106
4107 /*
4108  *      Try to find an ONboard, Brumby or Stallion board and initialize it.
4109  *      This handles only these board types.
4110  */
4111
4112 static inline int stli_initonb(stlibrd_t *brdp)
4113 {
4114         cdkonbsig_t     sig;
4115         cdkonbsig_t     *sigsp;
4116         char            *name;
4117         int             i;
4118
4119 #if DEBUG
4120         printk("stli_initonb(brdp=%x)\n", (int) brdp);
4121 #endif
4122
4123 /*
4124  *      Do a basic sanity check on the IO and memory addresses.
4125  */
4126         if ((brdp->iobase == 0) || (brdp->memaddr == 0))
4127                 return(-ENODEV);
4128
4129         brdp->iosize = ONB_IOSIZE;
4130         if (check_region(brdp->iobase, brdp->iosize))
4131                 printk("STALLION: Warning, board %d I/O address %x conflicts "
4132                         "with another device\n", brdp->brdnr, brdp->iobase);
4133
4134 /*
4135  *      Based on the specific board type setup the common vars to access
4136  *      and enable shared memory. Set all board specific information now
4137  *      as well.
4138  */
4139         switch (brdp->brdtype) {
4140         case BRD_ONBOARD:
4141         case BRD_ONBOARD32:
4142         case BRD_ONBOARD2:
4143         case BRD_ONBOARD2_32:
4144         case BRD_ONBOARDRS:
4145                 brdp->membase = (void *) brdp->memaddr;
4146                 brdp->memsize = ONB_MEMSIZE;
4147                 brdp->pagesize = ONB_ATPAGESIZE;
4148                 brdp->init = stli_onbinit;
4149                 brdp->enable = stli_onbenable;
4150                 brdp->reenable = stli_onbenable;
4151                 brdp->disable = stli_onbdisable;
4152                 brdp->getmemptr = stli_onbgetmemptr;
4153                 brdp->intr = stli_ecpintr;
4154                 brdp->reset = stli_onbreset;
4155                 if (brdp->memaddr > 0x100000)
4156                         brdp->enabval = ONB_MEMENABHI;
4157                 else
4158                         brdp->enabval = ONB_MEMENABLO;
4159                 name = "serial(ONBoard)";
4160                 break;
4161
4162         case BRD_ONBOARDE:
4163                 brdp->membase = (void *) brdp->memaddr;
4164                 brdp->memsize = ONB_EIMEMSIZE;
4165                 brdp->pagesize = ONB_EIPAGESIZE;
4166                 brdp->init = stli_onbeinit;
4167                 brdp->enable = stli_onbeenable;
4168                 brdp->reenable = stli_onbeenable;
4169                 brdp->disable = stli_onbedisable;
4170                 brdp->getmemptr = stli_onbegetmemptr;
4171                 brdp->intr = stli_ecpintr;
4172                 brdp->reset = stli_onbereset;
4173                 name = "serial(ONBoard/E)";
4174                 break;
4175
4176         case BRD_BRUMBY4:
4177         case BRD_BRUMBY8:
4178         case BRD_BRUMBY16:
4179                 brdp->membase = (void *) brdp->memaddr;
4180                 brdp->memsize = BBY_MEMSIZE;
4181                 brdp->pagesize = BBY_PAGESIZE;
4182                 brdp->init = stli_bbyinit;
4183                 brdp->enable = NULL;
4184                 brdp->reenable = NULL;
4185                 brdp->disable = NULL;
4186                 brdp->getmemptr = stli_bbygetmemptr;
4187                 brdp->intr = stli_ecpintr;
4188                 brdp->reset = stli_bbyreset;
4189                 name = "serial(Brumby)";
4190                 break;
4191
4192         case BRD_STALLION:
4193                 brdp->membase = (void *) brdp->memaddr;
4194                 brdp->memsize = STAL_MEMSIZE;
4195                 brdp->pagesize = STAL_PAGESIZE;
4196                 brdp->init = stli_stalinit;
4197                 brdp->enable = NULL;
4198                 brdp->reenable = NULL;
4199                 brdp->disable = NULL;
4200                 brdp->getmemptr = stli_stalgetmemptr;
4201                 brdp->intr = stli_ecpintr;
4202                 brdp->reset = stli_stalreset;
4203                 name = "serial(Stallion)";
4204                 break;
4205
4206         default:
4207                 return(-EINVAL);
4208         }
4209
4210 /*
4211  *      The per-board operations structure is all set up, so now let's go
4212  *      and get the board operational. Firstly initialize board configuration
4213  *      registers. Set the memory mapping info so we can get at the boards
4214  *      shared memory.
4215  */
4216         EBRDINIT(brdp);
4217
4218         brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
4219         if (brdp->membase == (void *) NULL)
4220                 return(-ENOMEM);
4221
4222 /*
4223  *      Now that all specific code is set up, enable the shared memory and
4224  *      look for the a signature area that will tell us exactly what board
4225  *      this is, and how many ports.
4226  */
4227         EBRDENABLE(brdp);
4228         sigsp = (cdkonbsig_t *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
4229         memcpy(&sig, sigsp, sizeof(cdkonbsig_t));
4230         EBRDDISABLE(brdp);
4231
4232 #if 0
4233         printk("%s(%d): sig-> magic=%x:%x:%x:%x romver=%x amask=%x:%x:%x\n",
4234                 __FILE__, __LINE__, sig.magic0, sig.magic1, sig.magic2,
4235                 sig.magic3, sig.romver, sig.amask0, sig.amask1, sig.amask2);
4236 #endif
4237
4238         if ((sig.magic0 != ONB_MAGIC0) || (sig.magic1 != ONB_MAGIC1) ||
4239             (sig.magic2 != ONB_MAGIC2) || (sig.magic3 != ONB_MAGIC3))
4240                 return(-ENODEV);
4241
4242 /*
4243  *      Scan through the signature alive mask and calculate how many ports
4244  *      there are on this board.
4245  */
4246         brdp->nrpanels = 1;
4247         if (sig.amask1) {
4248                 brdp->nrports = 32;
4249         } else {
4250                 for (i = 0; (i < 16); i++) {
4251                         if (((sig.amask0 << i) & 0x8000) == 0)
4252                                 break;
4253                 }
4254                 brdp->nrports = i;
4255         }
4256         brdp->panels[0] = brdp->nrports;
4257
4258         request_region(brdp->iobase, brdp->iosize, name);
4259         brdp->state |= BST_FOUND;
4260         return(0);
4261 }
4262
4263 /*****************************************************************************/
4264
4265 /*
4266  *      Start up a running board. This routine is only called after the
4267  *      code has been down loaded to the board and is operational. It will
4268  *      read in the memory map, and get the show on the road...
4269  */
4270
4271 static int stli_startbrd(stlibrd_t *brdp)
4272 {
4273         volatile cdkhdr_t       *hdrp;
4274         volatile cdkmem_t       *memp;
4275         volatile cdkasy_t       *ap;
4276         unsigned long           flags;
4277         stliport_t              *portp;
4278         int                     portnr, nrdevs, i, rc;
4279
4280 #if DEBUG
4281         printk("stli_startbrd(brdp=%x)\n", (int) brdp);
4282 #endif
4283
4284         rc = 0;
4285
4286         save_flags(flags);
4287         cli();
4288         EBRDENABLE(brdp);
4289         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
4290         nrdevs = hdrp->nrdevs;
4291
4292 #if 0
4293         printk("%s(%d): CDK version %d.%d.%d --> "
4294                 "nrdevs=%d memp=%x hostp=%x slavep=%x\n",
4295                  __FILE__, __LINE__, hdrp->ver_release, hdrp->ver_modification,
4296                  hdrp->ver_fix, nrdevs, (int) hdrp->memp, (int) hdrp->hostp,
4297                  (int) hdrp->slavep);
4298 #endif
4299
4300         if (nrdevs < (brdp->nrports + 1)) {
4301                 printk("STALLION: slave failed to allocate memory for all "
4302                         "devices, devices=%d\n", nrdevs);
4303                 brdp->nrports = nrdevs - 1;
4304         }
4305         brdp->nrdevs = nrdevs;
4306         brdp->hostoffset = hdrp->hostp - CDK_CDKADDR;
4307         brdp->slaveoffset = hdrp->slavep - CDK_CDKADDR;
4308         brdp->bitsize = (nrdevs + 7) / 8;
4309         memp = (volatile cdkmem_t *) hdrp->memp;
4310         if (((unsigned long) memp) > brdp->memsize) {
4311                 printk("STALLION: corrupted shared memory region?\n");
4312                 rc = -EIO;
4313                 goto stli_donestartup;
4314         }
4315         memp = (volatile cdkmem_t *) EBRDGETMEMPTR(brdp, (unsigned long) memp);
4316         if (memp->dtype != TYP_ASYNCTRL) {
4317                 printk("STALLION: no slave control device found\n");
4318                 goto stli_donestartup;
4319         }
4320         memp++;
4321
4322 /*
4323  *      Cycle through memory allocation of each port. We are guaranteed to
4324  *      have all ports inside the first page of slave window, so no need to
4325  *      change pages while reading memory map.
4326  */
4327         for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++, memp++) {
4328                 if (memp->dtype != TYP_ASYNC)
4329                         break;
4330                 portp = brdp->ports[portnr];
4331                 if (portp == (stliport_t *) NULL)
4332                         break;
4333                 portp->devnr = i;
4334                 portp->addr = memp->offset;
4335                 portp->reqbit = (unsigned char) (0x1 << (i * 8 / nrdevs));
4336                 portp->portidx = (unsigned char) (i / 8);
4337                 portp->portbit = (unsigned char) (0x1 << (i % 8));
4338         }
4339
4340         hdrp->slavereq = 0xff;
4341
4342 /*
4343  *      For each port setup a local copy of the RX and TX buffer offsets
4344  *      and sizes. We do this separate from the above, because we need to
4345  *      move the shared memory page...
4346  */
4347         for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++) {
4348                 portp = brdp->ports[portnr];
4349                 if (portp == (stliport_t *) NULL)
4350                         break;
4351                 if (portp->addr == 0)
4352                         break;
4353                 ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
4354                 if (ap != (volatile cdkasy_t *) NULL) {
4355                         portp->rxsize = ap->rxq.size;
4356                         portp->txsize = ap->txq.size;
4357                         portp->rxoffset = ap->rxq.offset;
4358                         portp->txoffset = ap->txq.offset;
4359                 }
4360         }
4361
4362 stli_donestartup:
4363         EBRDDISABLE(brdp);
4364         restore_flags(flags);
4365
4366         if (rc == 0)
4367                 brdp->state |= BST_STARTED;
4368
4369         if (! stli_timeron) {
4370                 stli_timeron++;
4371                 stli_timerlist.expires = STLI_TIMEOUT;
4372                 add_timer(&stli_timerlist);
4373         }
4374
4375         return(rc);
4376 }
4377
4378 /*****************************************************************************/
4379
4380 /*
4381  *      Probe and initialize the specified board.
4382  */
4383
4384 static int __init stli_brdinit(stlibrd_t *brdp)
4385 {
4386 #if DEBUG
4387         printk("stli_brdinit(brdp=%x)\n", (int) brdp);
4388 #endif
4389
4390         stli_brds[brdp->brdnr] = brdp;
4391
4392         switch (brdp->brdtype) {
4393         case BRD_ECP:
4394         case BRD_ECPE:
4395         case BRD_ECPMC:
4396         case BRD_ECPPCI:
4397                 stli_initecp(brdp);
4398                 break;
4399         case BRD_ONBOARD:
4400         case BRD_ONBOARDE:
4401         case BRD_ONBOARD2:
4402         case BRD_ONBOARD32:
4403         case BRD_ONBOARD2_32:
4404         case BRD_ONBOARDRS:
4405         case BRD_BRUMBY4:
4406         case BRD_BRUMBY8:
4407         case BRD_BRUMBY16:
4408         case BRD_STALLION:
4409                 stli_initonb(brdp);
4410                 break;
4411         case BRD_EASYIO:
4412         case BRD_ECH:
4413         case BRD_ECHMC:
4414         case BRD_ECHPCI:
4415                 printk("STALLION: %s board type not supported in this driver\n",
4416                         stli_brdnames[brdp->brdtype]);
4417                 return(ENODEV);
4418         default:
4419                 printk("STALLION: board=%d is unknown board type=%d\n",
4420                         brdp->brdnr, brdp->brdtype);
4421                 return(ENODEV);
4422         }
4423
4424         if ((brdp->state & BST_FOUND) == 0) {
4425                 printk("STALLION: %s board not found, board=%d io=%x mem=%x\n",
4426                         stli_brdnames[brdp->brdtype], brdp->brdnr,
4427                         brdp->iobase, (int) brdp->memaddr);
4428                 return(ENODEV);
4429         }
4430
4431         stli_initports(brdp);
4432         printk("STALLION: %s found, board=%d io=%x mem=%x "
4433                 "nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype],
4434                 brdp->brdnr, brdp->iobase, (int) brdp->memaddr,
4435                 brdp->nrpanels, brdp->nrports);
4436         return(0);
4437 }
4438
4439 /*****************************************************************************/
4440
4441 /*
4442  *      Probe around trying to find where the EISA boards shared memory
4443  *      might be. This is a bit if hack, but it is the best we can do.
4444  */
4445
4446 static inline int stli_eisamemprobe(stlibrd_t *brdp)
4447 {
4448         cdkecpsig_t     ecpsig, *ecpsigp;
4449         cdkonbsig_t     onbsig, *onbsigp;
4450         int             i, foundit;
4451
4452 #if DEBUG
4453         printk("stli_eisamemprobe(brdp=%x)\n", (int) brdp);
4454 #endif
4455
4456 /*
4457  *      First up we reset the board, to get it into a known state. There
4458  *      is only 2 board types here we need to worry about. Don;t use the
4459  *      standard board init routine here, it programs up the shared
4460  *      memory address, and we don't know it yet...
4461  */
4462         if (brdp->brdtype == BRD_ECPE) {
4463                 outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
4464                 outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
4465                 udelay(10);
4466                 outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
4467                 udelay(500);
4468                 stli_ecpeienable(brdp);
4469         } else if (brdp->brdtype == BRD_ONBOARDE) {
4470                 outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
4471                 outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
4472                 udelay(10);
4473                 outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
4474                 mdelay(100);
4475                 outb(0x1, brdp->iobase);
4476                 mdelay(1);
4477                 stli_onbeenable(brdp);
4478         } else {
4479                 return(-ENODEV);
4480         }
4481
4482         foundit = 0;
4483         brdp->memsize = ECP_MEMSIZE;
4484
4485 /*
4486  *      Board shared memory is enabled, so now we have a poke around and
4487  *      see if we can find it.
4488  */
4489         for (i = 0; (i < stli_eisamempsize); i++) {
4490                 brdp->memaddr = stli_eisamemprobeaddrs[i];
4491                 brdp->membase = (void *) brdp->memaddr;
4492                 brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
4493                 if (brdp->membase == (void *) NULL)
4494                         continue;
4495
4496                 if (brdp->brdtype == BRD_ECPE) {
4497                         ecpsigp = (cdkecpsig_t *) stli_ecpeigetmemptr(brdp,
4498                                 CDK_SIGADDR, __LINE__);
4499                         memcpy(&ecpsig, ecpsigp, sizeof(cdkecpsig_t));
4500                         if (ecpsig.magic == ECP_MAGIC)
4501                                 foundit = 1;
4502                 } else {
4503                         onbsigp = (cdkonbsig_t *) stli_onbegetmemptr(brdp,
4504                                 CDK_SIGADDR, __LINE__);
4505                         memcpy(&onbsig, onbsigp, sizeof(cdkonbsig_t));
4506                         if ((onbsig.magic0 == ONB_MAGIC0) &&
4507                             (onbsig.magic1 == ONB_MAGIC1) &&
4508                             (onbsig.magic2 == ONB_MAGIC2) &&
4509                             (onbsig.magic3 == ONB_MAGIC3))
4510                                 foundit = 1;
4511                 }
4512
4513                 iounmap(brdp->membase);
4514                 if (foundit)
4515                         break;
4516         }
4517
4518 /*
4519  *      Regardless of whether we found the shared memory or not we must
4520  *      disable the region. After that return success or failure.
4521  */
4522         if (brdp->brdtype == BRD_ECPE)
4523                 stli_ecpeidisable(brdp);
4524         else
4525                 stli_onbedisable(brdp);
4526
4527         if (! foundit) {
4528                 brdp->memaddr = 0;
4529                 brdp->membase = 0;
4530                 printk("STALLION: failed to probe shared memory region for "
4531                         "%s in EISA slot=%d\n", stli_brdnames[brdp->brdtype],
4532                         (brdp->iobase >> 12));
4533                 return(-ENODEV);
4534         }
4535         return(0);
4536 }
4537
4538 /*****************************************************************************/
4539
4540 /*
4541  *      Probe around and try to find any EISA boards in system. The biggest
4542  *      problem here is finding out what memory address is associated with
4543  *      an EISA board after it is found. The registers of the ECPE and
4544  *      ONboardE are not readable - so we can't read them from there. We
4545  *      don't have access to the EISA CMOS (or EISA BIOS) so we don't
4546  *      actually have any way to find out the real value. The best we can
4547  *      do is go probing around in the usual places hoping we can find it.
4548  */
4549
4550 static inline int stli_findeisabrds()
4551 {
4552         stlibrd_t       *brdp;
4553         unsigned int    iobase, eid;
4554         int             i;
4555
4556 #if DEBUG
4557         printk("stli_findeisabrds()\n");
4558 #endif
4559
4560 /*
4561  *      Firstly check if this is an EISA system. Do this by probing for
4562  *      the system board EISA ID. If this is not an EISA system then
4563  *      don't bother going any further!
4564  */
4565         outb(0xff, 0xc80);
4566         if (inb(0xc80) == 0xff)
4567                 return(0);
4568
4569 /*
4570  *      Looks like an EISA system, so go searching for EISA boards.
4571  */
4572         for (iobase = 0x1000; (iobase <= 0xc000); iobase += 0x1000) {
4573                 outb(0xff, (iobase + 0xc80));
4574                 eid = inb(iobase + 0xc80);
4575                 eid |= inb(iobase + 0xc81) << 8;
4576                 if (eid != STL_EISAID)
4577                         continue;
4578
4579 /*
4580  *              We have found a board. Need to check if this board was
4581  *              statically configured already (just in case!).
4582  */
4583                 for (i = 0; (i < STL_MAXBRDS); i++) {
4584                         brdp = stli_brds[i];
4585                         if (brdp == (stlibrd_t *) NULL)
4586                                 continue;
4587                         if (brdp->iobase == iobase)
4588                                 break;
4589                 }
4590                 if (i < STL_MAXBRDS)
4591                         continue;
4592
4593 /*
4594  *              We have found a Stallion board and it is not configured already.
4595  *              Allocate a board structure and initialize it.
4596  */
4597                 if ((brdp = stli_allocbrd()) == (stlibrd_t *) NULL)
4598                         return(-ENOMEM);
4599                 if ((brdp->brdnr = stli_getbrdnr()) < 0)
4600                         return(-ENOMEM);
4601                 eid = inb(iobase + 0xc82);
4602                 if (eid == ECP_EISAID)
4603                         brdp->brdtype = BRD_ECPE;
4604                 else if (eid == ONB_EISAID)
4605                         brdp->brdtype = BRD_ONBOARDE;
4606                 else
4607                         brdp->brdtype = BRD_UNKNOWN;
4608                 brdp->iobase = iobase;
4609                 outb(0x1, (iobase + 0xc84));
4610                 if (stli_eisamemprobe(brdp))
4611                         outb(0, (iobase + 0xc84));
4612                 stli_brdinit(brdp);
4613         }
4614
4615         return(0);
4616 }
4617
4618 /*****************************************************************************/
4619
4620 /*
4621  *      Find the next available board number that is free.
4622  */
4623
4624 static inline int stli_getbrdnr()
4625 {
4626         int     i;
4627
4628         for (i = 0; (i < STL_MAXBRDS); i++) {
4629                 if (stli_brds[i] == (stlibrd_t *) NULL) {
4630                         if (i >= stli_nrbrds)
4631                                 stli_nrbrds = i + 1;
4632                         return(i);
4633                 }
4634         }
4635         return(-1);
4636 }
4637
4638 /*****************************************************************************/
4639
4640 #ifdef  CONFIG_PCI
4641
4642 /*
4643  *      We have a Stallion board. Allocate a board structure and
4644  *      initialize it. Read its IO and MEMORY resources from PCI
4645  *      configuration space.
4646  */
4647
4648 static inline int stli_initpcibrd(int brdtype, struct pci_dev *devp)
4649 {
4650         stlibrd_t       *brdp;
4651
4652 #if DEBUG
4653         printk("stli_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype,
4654                 dev->bus->number, dev->devfn);
4655 #endif
4656
4657         if (pci_enable_device(devp))
4658                 return(-EIO);
4659         if ((brdp = stli_allocbrd()) == (stlibrd_t *) NULL)
4660                 return(-ENOMEM);
4661         if ((brdp->brdnr = stli_getbrdnr()) < 0) {
4662                 printk("STALLION: too many boards found, "
4663                         "maximum supported %d\n", STL_MAXBRDS);
4664                 return(0);
4665         }
4666         brdp->brdtype = brdtype;
4667
4668 #if DEBUG
4669         printk("%s(%d): BAR[]=%lx,%lx,%lx,%lx\n", __FILE__, __LINE__,
4670                 pci_resource_start(devp, 0),
4671                 pci_resource_start(devp, 1),
4672                 pci_resource_start(devp, 2),
4673                 pci_resource_start(devp, 3));
4674 #endif
4675
4676 /*
4677  *      We have all resources from the board, so lets setup the actual
4678  *      board structure now.
4679  */
4680         brdp->iobase = pci_resource_start(devp, 3);
4681         brdp->memaddr = pci_resource_start(devp, 2);
4682         stli_brdinit(brdp);
4683
4684         return(0);
4685 }
4686
4687 /*****************************************************************************/
4688
4689 /*
4690  *      Find all Stallion PCI boards that might be installed. Initialize each
4691  *      one as it is found.
4692  */
4693
4694 static inline int stli_findpcibrds()
4695 {
4696         struct pci_dev  *dev = NULL;
4697         int             rc;
4698
4699 #if DEBUG
4700         printk("stli_findpcibrds()\n");
4701 #endif
4702
4703         if (! pci_present())
4704                 return(0);
4705
4706         while ((dev = pci_find_device(PCI_VENDOR_ID_STALLION,
4707             PCI_DEVICE_ID_ECRA, dev))) {
4708                 if ((rc = stli_initpcibrd(BRD_ECPPCI, dev)))
4709                         return(rc);
4710         }
4711
4712         return(0);
4713 }
4714
4715 #endif
4716
4717 /*****************************************************************************/
4718
4719 /*
4720  *      Allocate a new board structure. Fill out the basic info in it.
4721  */
4722
4723 static stlibrd_t *stli_allocbrd()
4724 {
4725         stlibrd_t       *brdp;
4726
4727         brdp = (stlibrd_t *) stli_memalloc(sizeof(stlibrd_t));
4728         if (brdp == (stlibrd_t *) NULL) {
4729                 printk("STALLION: failed to allocate memory (size=%d)\n",
4730                         sizeof(stlibrd_t));
4731                 return((stlibrd_t *) NULL);
4732         }
4733
4734         memset(brdp, 0, sizeof(stlibrd_t));
4735         brdp->magic = STLI_BOARDMAGIC;
4736         return(brdp);
4737 }
4738
4739 /*****************************************************************************/
4740
4741 /*
4742  *      Scan through all the boards in the configuration and see what we
4743  *      can find.
4744  */
4745
4746 static inline int stli_initbrds()
4747 {
4748         stlibrd_t       *brdp, *nxtbrdp;
4749         stlconf_t       *confp;
4750         int             i, j;
4751
4752 #if DEBUG
4753         printk("stli_initbrds()\n");
4754 #endif
4755
4756         if (stli_nrbrds > STL_MAXBRDS) {
4757                 printk("STALLION: too many boards in configuration table, "
4758                         "truncating to %d\n", STL_MAXBRDS);
4759                 stli_nrbrds = STL_MAXBRDS;
4760         }
4761
4762 /*
4763  *      Firstly scan the list of static boards configured. Allocate
4764  *      resources and initialize the boards as found. If this is a
4765  *      module then let the module args override static configuration.
4766  */
4767         for (i = 0; (i < stli_nrbrds); i++) {
4768                 confp = &stli_brdconf[i];
4769 #ifdef MODULE
4770                 stli_parsebrd(confp, stli_brdsp[i]);
4771 #endif
4772                 if ((brdp = stli_allocbrd()) == (stlibrd_t *) NULL)
4773                         return(-ENOMEM);
4774                 brdp->brdnr = i;
4775                 brdp->brdtype = confp->brdtype;
4776                 brdp->iobase = confp->ioaddr1;
4777                 brdp->memaddr = confp->memaddr;
4778                 stli_brdinit(brdp);
4779         }
4780
4781 /*
4782  *      Static configuration table done, so now use dynamic methods to
4783  *      see if any more boards should be configured.
4784  */
4785 #ifdef MODULE
4786         stli_argbrds();
4787 #endif
4788         if (stli_eisaprobe)
4789                 stli_findeisabrds();
4790 #ifdef CONFIG_PCI
4791         stli_findpcibrds();
4792 #endif
4793
4794 /*
4795  *      All found boards are initialized. Now for a little optimization, if
4796  *      no boards are sharing the "shared memory" regions then we can just
4797  *      leave them all enabled. This is in fact the usual case.
4798  */
4799         stli_shared = 0;
4800         if (stli_nrbrds > 1) {
4801                 for (i = 0; (i < stli_nrbrds); i++) {
4802                         brdp = stli_brds[i];
4803                         if (brdp == (stlibrd_t *) NULL)
4804                                 continue;
4805                         for (j = i + 1; (j < stli_nrbrds); j++) {
4806                                 nxtbrdp = stli_brds[j];
4807                                 if (nxtbrdp == (stlibrd_t *) NULL)
4808                                         continue;
4809                                 if ((brdp->membase >= nxtbrdp->membase) &&
4810                                     (brdp->membase <= (nxtbrdp->membase +
4811                                     nxtbrdp->memsize - 1))) {
4812                                         stli_shared++;
4813                                         break;
4814                                 }
4815                         }
4816                 }
4817         }
4818
4819         if (stli_shared == 0) {
4820                 for (i = 0; (i < stli_nrbrds); i++) {
4821                         brdp = stli_brds[i];
4822                         if (brdp == (stlibrd_t *) NULL)
4823                                 continue;
4824                         if (brdp->state & BST_FOUND) {
4825                                 EBRDENABLE(brdp);
4826                                 brdp->enable = NULL;
4827                                 brdp->disable = NULL;
4828                         }
4829                 }
4830         }
4831
4832         return(0);
4833 }
4834
4835 /*****************************************************************************/
4836
4837 /*
4838  *      Code to handle an "staliomem" read operation. This device is the
4839  *      contents of the board shared memory. It is used for down loading
4840  *      the slave image (and debugging :-)
4841  */
4842
4843 static ssize_t stli_memread(struct file *fp, char *buf, size_t count, loff_t *offp)
4844 {
4845         unsigned long   flags;
4846         void            *memptr;
4847         stlibrd_t       *brdp;
4848         int             brdnr, size, n;
4849
4850 #if DEBUG
4851         printk("stli_memread(fp=%x,buf=%x,count=%x,offp=%x)\n", (int) fp,
4852                 (int) buf, count, (int) offp);
4853 #endif
4854
4855         brdnr = MINOR(fp->f_dentry->d_inode->i_rdev);
4856         if (brdnr >= stli_nrbrds)
4857                 return(-ENODEV);
4858         brdp = stli_brds[brdnr];
4859         if (brdp == (stlibrd_t *) NULL)
4860                 return(-ENODEV);
4861         if (brdp->state == 0)
4862                 return(-ENODEV);
4863         if (fp->f_pos >= brdp->memsize)
4864                 return(0);
4865
4866         size = MIN(count, (brdp->memsize - fp->f_pos));
4867
4868         save_flags(flags);
4869         cli();
4870         EBRDENABLE(brdp);
4871         while (size > 0) {
4872                 memptr = (void *) EBRDGETMEMPTR(brdp, fp->f_pos);
4873                 n = MIN(size, (brdp->pagesize - (((unsigned long) fp->f_pos) % brdp->pagesize)));
4874                 copy_to_user(buf, memptr, n);
4875                 fp->f_pos += n;
4876                 buf += n;
4877                 size -= n;
4878         }
4879         EBRDDISABLE(brdp);
4880         restore_flags(flags);
4881
4882         return(count);
4883 }
4884
4885 /*****************************************************************************/
4886
4887 /*
4888  *      Code to handle an "staliomem" write operation. This device is the
4889  *      contents of the board shared memory. It is used for down loading
4890  *      the slave image (and debugging :-)
4891  */
4892
4893 static ssize_t stli_memwrite(struct file *fp, const char *buf, size_t count, loff_t *offp)
4894 {
4895         unsigned long   flags;
4896         void            *memptr;
4897         stlibrd_t       *brdp;
4898         char            *chbuf;
4899         int             brdnr, size, n;
4900
4901 #if DEBUG
4902         printk("stli_memwrite(fp=%x,buf=%x,count=%x,offp=%x)\n", (int) fp,
4903                 (int) buf, count, (int) offp);
4904 #endif
4905
4906         brdnr = MINOR(fp->f_dentry->d_inode->i_rdev);
4907         if (brdnr >= stli_nrbrds)
4908                 return(-ENODEV);
4909         brdp = stli_brds[brdnr];
4910         if (brdp == (stlibrd_t *) NULL)
4911                 return(-ENODEV);
4912         if (brdp->state == 0)
4913                 return(-ENODEV);
4914         if (fp->f_pos >= brdp->memsize)
4915                 return(0);
4916
4917         chbuf = (char *) buf;
4918         size = MIN(count, (brdp->memsize - fp->f_pos));
4919
4920         save_flags(flags);
4921         cli();
4922         EBRDENABLE(brdp);
4923         while (size > 0) {
4924                 memptr = (void *) EBRDGETMEMPTR(brdp, fp->f_pos);
4925                 n = MIN(size, (brdp->pagesize - (((unsigned long) fp->f_pos) % brdp->pagesize)));
4926                 copy_from_user(memptr, chbuf, n);
4927                 fp->f_pos += n;
4928                 chbuf += n;
4929                 size -= n;
4930         }
4931         EBRDDISABLE(brdp);
4932         restore_flags(flags);
4933
4934         return(count);
4935 }
4936
4937 /*****************************************************************************/
4938
4939 /*
4940  *      Return the board stats structure to user app.
4941  */
4942
4943 static int stli_getbrdstats(combrd_t *bp)
4944 {
4945         stlibrd_t       *brdp;
4946         int             i;
4947
4948         copy_from_user(&stli_brdstats, bp, sizeof(combrd_t));
4949         if (stli_brdstats.brd >= STL_MAXBRDS)
4950                 return(-ENODEV);
4951         brdp = stli_brds[stli_brdstats.brd];
4952         if (brdp == (stlibrd_t *) NULL)
4953                 return(-ENODEV);
4954
4955         memset(&stli_brdstats, 0, sizeof(combrd_t));
4956         stli_brdstats.brd = brdp->brdnr;
4957         stli_brdstats.type = brdp->brdtype;
4958         stli_brdstats.hwid = 0;
4959         stli_brdstats.state = brdp->state;
4960         stli_brdstats.ioaddr = brdp->iobase;
4961         stli_brdstats.memaddr = brdp->memaddr;
4962         stli_brdstats.nrpanels = brdp->nrpanels;
4963         stli_brdstats.nrports = brdp->nrports;
4964         for (i = 0; (i < brdp->nrpanels); i++) {
4965                 stli_brdstats.panels[i].panel = i;
4966                 stli_brdstats.panels[i].hwid = brdp->panelids[i];
4967                 stli_brdstats.panels[i].nrports = brdp->panels[i];
4968         }
4969
4970         copy_to_user(bp, &stli_brdstats, sizeof(combrd_t));
4971         return(0);
4972 }
4973
4974 /*****************************************************************************/
4975
4976 /*
4977  *      Resolve the referenced port number into a port struct pointer.
4978  */
4979
4980 static stliport_t *stli_getport(int brdnr, int panelnr, int portnr)
4981 {
4982         stlibrd_t       *brdp;
4983         int             i;
4984
4985         if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
4986                 return((stliport_t *) NULL);
4987         brdp = stli_brds[brdnr];
4988         if (brdp == (stlibrd_t *) NULL)
4989                 return((stliport_t *) NULL);
4990         for (i = 0; (i < panelnr); i++)
4991                 portnr += brdp->panels[i];
4992         if ((portnr < 0) || (portnr >= brdp->nrports))
4993                 return((stliport_t *) NULL);
4994         return(brdp->ports[portnr]);
4995 }
4996
4997 /*****************************************************************************/
4998
4999 /*
5000  *      Return the port stats structure to user app. A NULL port struct
5001  *      pointer passed in means that we need to find out from the app
5002  *      what port to get stats for (used through board control device).
5003  */
5004
5005 static int stli_portcmdstats(stliport_t *portp)
5006 {
5007         unsigned long   flags;
5008         stlibrd_t       *brdp;
5009         int             rc;
5010
5011         memset(&stli_comstats, 0, sizeof(comstats_t));
5012
5013         if (portp == (stliport_t *) NULL)
5014                 return(-ENODEV);
5015         brdp = stli_brds[portp->brdnr];
5016         if (brdp == (stlibrd_t *) NULL)
5017                 return(-ENODEV);
5018
5019         if (brdp->state & BST_STARTED) {
5020                 if ((rc = stli_cmdwait(brdp, portp, A_GETSTATS,
5021                     &stli_cdkstats, sizeof(asystats_t), 1)) < 0)
5022                         return(rc);
5023         } else {
5024                 memset(&stli_cdkstats, 0, sizeof(asystats_t));
5025         }
5026
5027         stli_comstats.brd = portp->brdnr;
5028         stli_comstats.panel = portp->panelnr;
5029         stli_comstats.port = portp->portnr;
5030         stli_comstats.state = portp->state;
5031         stli_comstats.flags = portp->flags;
5032
5033         save_flags(flags);
5034         cli();
5035         if (portp->tty != (struct tty_struct *) NULL) {
5036                 if (portp->tty->driver_data == portp) {
5037                         stli_comstats.ttystate = portp->tty->flags;
5038                         stli_comstats.rxbuffered = portp->tty->flip.count;
5039                         if (portp->tty->termios != (struct termios *) NULL) {
5040                                 stli_comstats.cflags = portp->tty->termios->c_cflag;
5041                                 stli_comstats.iflags = portp->tty->termios->c_iflag;
5042                                 stli_comstats.oflags = portp->tty->termios->c_oflag;
5043                                 stli_comstats.lflags = portp->tty->termios->c_lflag;
5044                         }
5045                 }
5046         }
5047         restore_flags(flags);
5048
5049         stli_comstats.txtotal = stli_cdkstats.txchars;
5050         stli_comstats.rxtotal = stli_cdkstats.rxchars + stli_cdkstats.ringover;
5051         stli_comstats.txbuffered = stli_cdkstats.txringq;
5052         stli_comstats.rxbuffered += stli_cdkstats.rxringq;
5053         stli_comstats.rxoverrun = stli_cdkstats.overruns;
5054         stli_comstats.rxparity = stli_cdkstats.parity;
5055         stli_comstats.rxframing = stli_cdkstats.framing;
5056         stli_comstats.rxlost = stli_cdkstats.ringover;
5057         stli_comstats.rxbreaks = stli_cdkstats.rxbreaks;
5058         stli_comstats.txbreaks = stli_cdkstats.txbreaks;
5059         stli_comstats.txxon = stli_cdkstats.txstart;
5060         stli_comstats.txxoff = stli_cdkstats.txstop;
5061         stli_comstats.rxxon = stli_cdkstats.rxstart;
5062         stli_comstats.rxxoff = stli_cdkstats.rxstop;
5063         stli_comstats.rxrtsoff = stli_cdkstats.rtscnt / 2;
5064         stli_comstats.rxrtson = stli_cdkstats.rtscnt - stli_comstats.rxrtsoff;
5065         stli_comstats.modem = stli_cdkstats.dcdcnt;
5066         stli_comstats.hwid = stli_cdkstats.hwid;
5067         stli_comstats.signals = stli_mktiocm(stli_cdkstats.signals);
5068
5069         return(0);
5070 }
5071
5072 /*****************************************************************************/
5073
5074 /*
5075  *      Return the port stats structure to user app. A NULL port struct
5076  *      pointer passed in means that we need to find out from the app
5077  *      what port to get stats for (used through board control device).
5078  */
5079
5080 static int stli_getportstats(stliport_t *portp, comstats_t *cp)
5081 {
5082         stlibrd_t       *brdp;
5083         int             rc;
5084
5085         if (portp == (stliport_t *) NULL) {
5086                 copy_from_user(&stli_comstats, cp, sizeof(comstats_t));
5087                 portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
5088                         stli_comstats.port);
5089                 if (portp == (stliport_t *) NULL)
5090                         return(-ENODEV);
5091         }
5092
5093         brdp = stli_brds[portp->brdnr];
5094         if (brdp == (stlibrd_t *) NULL)
5095                 return(-ENODEV);
5096
5097         if ((rc = stli_portcmdstats(portp)) < 0)
5098                 return(rc);
5099
5100         copy_to_user(cp, &stli_comstats, sizeof(comstats_t));
5101         return(0);
5102 }
5103
5104 /*****************************************************************************/
5105
5106 /*
5107  *      Clear the port stats structure. We also return it zeroed out...
5108  */
5109
5110 static int stli_clrportstats(stliport_t *portp, comstats_t *cp)
5111 {
5112         stlibrd_t       *brdp;
5113         int             rc;
5114
5115         if (portp == (stliport_t *) NULL) {
5116                 copy_from_user(&stli_comstats, cp, sizeof(comstats_t));
5117                 portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
5118                         stli_comstats.port);
5119                 if (portp == (stliport_t *) NULL)
5120                         return(-ENODEV);
5121         }
5122
5123         brdp = stli_brds[portp->brdnr];
5124         if (brdp == (stlibrd_t *) NULL)
5125                 return(-ENODEV);
5126
5127         if (brdp->state & BST_STARTED) {
5128                 if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, 0, 0, 0)) < 0)
5129                         return(rc);
5130         }
5131
5132         memset(&stli_comstats, 0, sizeof(comstats_t));
5133         stli_comstats.brd = portp->brdnr;
5134         stli_comstats.panel = portp->panelnr;
5135         stli_comstats.port = portp->portnr;
5136
5137         copy_to_user(cp, &stli_comstats, sizeof(comstats_t));
5138         return(0);
5139 }
5140
5141 /*****************************************************************************/
5142
5143 /*
5144  *      Return the entire driver ports structure to a user app.
5145  */
5146
5147 static int stli_getportstruct(unsigned long arg)
5148 {
5149         stliport_t      *portp;
5150
5151         copy_from_user(&stli_dummyport, (void *) arg, sizeof(stliport_t));
5152         portp = stli_getport(stli_dummyport.brdnr, stli_dummyport.panelnr,
5153                  stli_dummyport.portnr);
5154         if (portp == (stliport_t *) NULL)
5155                 return(-ENODEV);
5156         copy_to_user((void *) arg, portp, sizeof(stliport_t));
5157         return(0);
5158 }
5159
5160 /*****************************************************************************/
5161
5162 /*
5163  *      Return the entire driver board structure to a user app.
5164  */
5165
5166 static int stli_getbrdstruct(unsigned long arg)
5167 {
5168         stlibrd_t       *brdp;
5169
5170         copy_from_user(&stli_dummybrd, (void *) arg, sizeof(stlibrd_t));
5171         if ((stli_dummybrd.brdnr < 0) || (stli_dummybrd.brdnr >= STL_MAXBRDS))
5172                 return(-ENODEV);
5173         brdp = stli_brds[stli_dummybrd.brdnr];
5174         if (brdp == (stlibrd_t *) NULL)
5175                 return(-ENODEV);
5176         copy_to_user((void *) arg, brdp, sizeof(stlibrd_t));
5177         return(0);
5178 }
5179
5180 /*****************************************************************************/
5181
5182 /*
5183  *      The "staliomem" device is also required to do some special operations on
5184  *      the board. We need to be able to send an interrupt to the board,
5185  *      reset it, and start/stop it.
5186  */
5187
5188 static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
5189 {
5190         stlibrd_t       *brdp;
5191         int             brdnr, rc, done;
5192
5193 #if DEBUG
5194         printk("stli_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip,
5195                 (int) fp, cmd, (int) arg);
5196 #endif
5197
5198 /*
5199  *      First up handle the board independent ioctls.
5200  */
5201         done = 0;
5202         rc = 0;
5203
5204         switch (cmd) {
5205         case COM_GETPORTSTATS:
5206                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
5207                     sizeof(comstats_t))) == 0)
5208                         rc = stli_getportstats((stliport_t *) NULL,
5209                                 (comstats_t *) arg);
5210                 done++;
5211                 break;
5212         case COM_CLRPORTSTATS:
5213                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
5214                     sizeof(comstats_t))) == 0)
5215                         rc = stli_clrportstats((stliport_t *) NULL,
5216                                 (comstats_t *) arg);
5217                 done++;
5218                 break;
5219         case COM_GETBRDSTATS:
5220                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
5221                     sizeof(combrd_t))) == 0)
5222                         rc = stli_getbrdstats((combrd_t *) arg);
5223                 done++;
5224                 break;
5225         case COM_READPORT:
5226                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
5227                     sizeof(stliport_t))) == 0)
5228                         rc = stli_getportstruct(arg);
5229                 done++;
5230                 break;
5231         case COM_READBOARD:
5232                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
5233                     sizeof(stlibrd_t))) == 0)
5234                         rc = stli_getbrdstruct(arg);
5235                 done++;
5236                 break;
5237         default:
5238                 break;
5239         }
5240
5241         if (done)
5242                 return(rc);
5243
5244 /*
5245  *      Now handle the board specific ioctls. These all depend on the
5246  *      minor number of the device they were called from.
5247  */
5248         brdnr = MINOR(ip->i_rdev);
5249         if (brdnr >= STL_MAXBRDS)
5250                 return(-ENODEV);
5251         brdp = stli_brds[brdnr];
5252         if (brdp == (stlibrd_t *) NULL)
5253                 return(-ENODEV);
5254         if (brdp->state == 0)
5255                 return(-ENODEV);
5256
5257         switch (cmd) {
5258         case STL_BINTR:
5259                 EBRDINTR(brdp);
5260                 break;
5261         case STL_BSTART:
5262                 rc = stli_startbrd(brdp);
5263                 break;
5264         case STL_BSTOP:
5265                 brdp->state &= ~BST_STARTED;
5266                 break;
5267         case STL_BRESET:
5268                 brdp->state &= ~BST_STARTED;
5269                 EBRDRESET(brdp);
5270                 if (stli_shared == 0) {
5271                         if (brdp->reenable != NULL)
5272                                 (* brdp->reenable)(brdp);
5273                 }
5274                 break;
5275         default:
5276                 rc = -ENOIOCTLCMD;
5277                 break;
5278         }
5279
5280         return(rc);
5281 }
5282
5283 /*****************************************************************************/
5284
5285 int __init stli_init(void)
5286 {
5287         printk(KERN_INFO "%s: version %s\n", stli_drvtitle, stli_drvversion);
5288
5289         stli_initbrds();
5290
5291 /*
5292  *      Allocate a temporary write buffer.
5293  */
5294         stli_tmpwritebuf = (char *) stli_memalloc(STLI_TXBUFSIZE);
5295         if (stli_tmpwritebuf == (char *) NULL)
5296                 printk("STALLION: failed to allocate memory (size=%d)\n",
5297                         STLI_TXBUFSIZE);
5298         stli_txcookbuf = (char *) stli_memalloc(STLI_TXBUFSIZE);
5299         if (stli_txcookbuf == (char *) NULL)
5300                 printk("STALLION: failed to allocate memory (size=%d)\n",
5301                         STLI_TXBUFSIZE);
5302
5303 /*
5304  *      Set up a character driver for the shared memory region. We need this
5305  *      to down load the slave code image. Also it is a useful debugging tool.
5306  */
5307         if (devfs_register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem))
5308                 printk("STALLION: failed to register serial memory device\n");
5309
5310         devfs_handle = devfs_mk_dir (NULL, "staliomem", NULL);
5311         devfs_register_series (devfs_handle, "%u", 4, DEVFS_FL_DEFAULT,
5312                                STL_SIOMEMMAJOR, 0,
5313                                S_IFCHR | S_IRUSR | S_IWUSR,
5314                                &stli_fsiomem, NULL);
5315
5316 /*
5317  *      Set up the tty driver structure and register us as a driver.
5318  *      Also setup the callout tty device.
5319  */
5320         memset(&stli_serial, 0, sizeof(struct tty_driver));
5321         stli_serial.magic = TTY_DRIVER_MAGIC;
5322         stli_serial.driver_name = stli_drvname;
5323         stli_serial.name = stli_serialname;
5324         stli_serial.major = STL_SERIALMAJOR;
5325         stli_serial.minor_start = 0;
5326         stli_serial.num = STL_MAXBRDS * STL_MAXPORTS;
5327         stli_serial.type = TTY_DRIVER_TYPE_SERIAL;
5328         stli_serial.subtype = STL_DRVTYPSERIAL;
5329         stli_serial.init_termios = stli_deftermios;
5330         stli_serial.flags = TTY_DRIVER_REAL_RAW;
5331         stli_serial.refcount = &stli_refcount;
5332         stli_serial.table = stli_ttys;
5333         stli_serial.termios = stli_termios;
5334         stli_serial.termios_locked = stli_termioslocked;
5335
5336         stli_serial.open = stli_open;
5337         stli_serial.close = stli_close;
5338         stli_serial.write = stli_write;
5339         stli_serial.put_char = stli_putchar;
5340         stli_serial.flush_chars = stli_flushchars;
5341         stli_serial.write_room = stli_writeroom;
5342         stli_serial.chars_in_buffer = stli_charsinbuffer;
5343         stli_serial.ioctl = stli_ioctl;
5344         stli_serial.set_termios = stli_settermios;
5345         stli_serial.throttle = stli_throttle;
5346         stli_serial.unthrottle = stli_unthrottle;
5347         stli_serial.stop = stli_stop;
5348         stli_serial.start = stli_start;
5349         stli_serial.hangup = stli_hangup;
5350         stli_serial.flush_buffer = stli_flushbuffer;
5351         stli_serial.break_ctl = stli_breakctl;
5352         stli_serial.wait_until_sent = stli_waituntilsent;
5353         stli_serial.send_xchar = stli_sendxchar;
5354         stli_serial.read_proc = stli_readproc;
5355
5356         stli_callout = stli_serial;
5357         stli_callout.name = stli_calloutname;
5358         stli_callout.major = STL_CALLOUTMAJOR;
5359         stli_callout.subtype = STL_DRVTYPCALLOUT;
5360         stli_callout.read_proc = 0;
5361
5362         if (tty_register_driver(&stli_serial))
5363                 printk("STALLION: failed to register serial driver\n");
5364         if (tty_register_driver(&stli_callout))
5365                 printk("STALLION: failed to register callout driver\n");
5366
5367         return(0);
5368 }
5369
5370 /*****************************************************************************/