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[PATCH] i2c: Drop i2c_driver.flags, 3 of 3
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / stallion.c
blob95af2a941595517ca0ea30daa4a380a739724475
1 /*****************************************************************************/
2
3 /*
4 * stallion.c -- stallion multiport serial driver.
5 *
6 * Copyright (C) 1996-1999 Stallion Technologies
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/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/tty.h>
34 #include <linux/tty_flip.h>
35 #include <linux/serial.h>
36 #include <linux/cd1400.h>
37 #include <linux/sc26198.h>
38 #include <linux/comstats.h>
39 #include <linux/stallion.h>
40 #include <linux/ioport.h>
41 #include <linux/init.h>
42 #include <linux/smp_lock.h>
43 #include <linux/devfs_fs_kernel.h>
44 #include <linux/device.h>
45 #include <linux/delay.h>
46
47 #include <asm/io.h>
48 #include <asm/uaccess.h>
49
50 #ifdef CONFIG_PCI
51 #include <linux/pci.h>
52 #endif
53
54 /*****************************************************************************/
55
56 /*
57 * Define different board types. Use the standard Stallion "assigned"
58 * board numbers. Boards supported in this driver are abbreviated as
59 * EIO = EasyIO and ECH = EasyConnection 8/32.
60 */
61 #define BRD_EASYIO 20
62 #define BRD_ECH 21
63 #define BRD_ECHMC 22
64 #define BRD_ECHPCI 26
65 #define BRD_ECH64PCI 27
66 #define BRD_EASYIOPCI 28
67
68 /*
69 * Define a configuration structure to hold the board configuration.
70 * Need to set this up in the code (for now) with the boards that are
71 * to be configured into the system. This is what needs to be modified
72 * when adding/removing/modifying boards. Each line entry in the
73 * stl_brdconf[] array is a board. Each line contains io/irq/memory
74 * ranges for that board (as well as what type of board it is).
75 * Some examples:
76 * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },
77 * This line would configure an EasyIO board (4 or 8, no difference),
78 * at io address 2a0 and irq 10.
79 * Another example:
80 * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 },
81 * This line will configure an EasyConnection 8/32 board at primary io
82 * address 2a8, secondary io address 280 and irq 12.
83 * Enter as many lines into this array as you want (only the first 4
84 * will actually be used!). Any combination of EasyIO and EasyConnection
85 * boards can be specified. EasyConnection 8/32 boards can share their
86 * secondary io addresses between each other.
87 *
88 * NOTE: there is no need to put any entries in this table for PCI
89 * boards. They will be found automatically by the driver - provided
90 * PCI BIOS32 support is compiled into the kernel.
91 */
92
93 typedef struct {
94 int brdtype;
95 int ioaddr1;
96 int ioaddr2;
97 unsigned long memaddr;
98 int irq;
99 int irqtype;
100 } stlconf_t;
101
102 static stlconf_t stl_brdconf[] = {
103 /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/
104 };
105
106 static int stl_nrbrds = sizeof(stl_brdconf) / sizeof(stlconf_t);
107
108 /*****************************************************************************/
109
110 /*
111 * Define some important driver characteristics. Device major numbers
112 * allocated as per Linux Device Registry.
113 */
114 #ifndef STL_SIOMEMMAJOR
115 #define STL_SIOMEMMAJOR 28
116 #endif
117 #ifndef STL_SERIALMAJOR
118 #define STL_SERIALMAJOR 24
119 #endif
120 #ifndef STL_CALLOUTMAJOR
121 #define STL_CALLOUTMAJOR 25
122 #endif
123
124 /*
125 * Set the TX buffer size. Bigger is better, but we don't want
126 * to chew too much memory with buffers!
127 */
128 #define STL_TXBUFLOW 512
129 #define STL_TXBUFSIZE 4096
130
131 /*****************************************************************************/
132
133 /*
134 * Define our local driver identity first. Set up stuff to deal with
135 * all the local structures required by a serial tty driver.
136 */
137 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
138 static char *stl_drvname = "stallion";
139 static char *stl_drvversion = "5.6.0";
140
141 static struct tty_driver *stl_serial;
142
143 /*
144 * We will need to allocate a temporary write buffer for chars that
145 * come direct from user space. The problem is that a copy from user
146 * space might cause a page fault (typically on a system that is
147 * swapping!). All ports will share one buffer - since if the system
148 * is already swapping a shared buffer won't make things any worse.
149 */
150 static char *stl_tmpwritebuf;
151 static DECLARE_MUTEX(stl_tmpwritesem);
152
153 /*
154 * Define a local default termios struct. All ports will be created
155 * with this termios initially. Basically all it defines is a raw port
156 * at 9600, 8 data bits, 1 stop bit.
157 */
158 static struct termios stl_deftermios = {
159 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
160 .c_cc = INIT_C_CC,
161 };
162
163 /*
164 * Define global stats structures. Not used often, and can be
165 * re-used for each stats call.
166 */
167 static comstats_t stl_comstats;
168 static combrd_t stl_brdstats;
169 static stlbrd_t stl_dummybrd;
170 static stlport_t stl_dummyport;
171
172 /*
173 * Define global place to put buffer overflow characters.
174 */
175 static char stl_unwanted[SC26198_RXFIFOSIZE];
176
177 /*****************************************************************************/
178
179 static stlbrd_t *stl_brds[STL_MAXBRDS];
180
181 /*
182 * Per board state flags. Used with the state field of the board struct.
183 * Not really much here!
184 */
185 #define BRD_FOUND 0x1
186
187 /*
188 * Define the port structure istate flags. These set of flags are
189 * modified at interrupt time - so setting and reseting them needs
190 * to be atomic. Use the bit clear/setting routines for this.
191 */
192 #define ASYI_TXBUSY 1
193 #define ASYI_TXLOW 2
194 #define ASYI_DCDCHANGE 3
195 #define ASYI_TXFLOWED 4
196
197 /*
198 * Define an array of board names as printable strings. Handy for
199 * referencing boards when printing trace and stuff.
200 */
201 static char *stl_brdnames[] = {
202 (char *) NULL,
203 (char *) NULL,
204 (char *) NULL,
205 (char *) NULL,
206 (char *) NULL,
207 (char *) NULL,
208 (char *) NULL,
209 (char *) NULL,
210 (char *) NULL,
211 (char *) NULL,
212 (char *) NULL,
213 (char *) NULL,
214 (char *) NULL,
215 (char *) NULL,
216 (char *) NULL,
217 (char *) NULL,
218 (char *) NULL,
219 (char *) NULL,
220 (char *) NULL,
221 (char *) NULL,
222 "EasyIO",
223 "EC8/32-AT",
224 "EC8/32-MC",
225 (char *) NULL,
226 (char *) NULL,
227 (char *) NULL,
228 "EC8/32-PCI",
229 "EC8/64-PCI",
230 "EasyIO-PCI",
231 };
232
233 /*****************************************************************************/
234
235 /*
236 * Define some string labels for arguments passed from the module
237 * load line. These allow for easy board definitions, and easy
238 * modification of the io, memory and irq resoucres.
239 */
240 static int stl_nargs = 0;
241 static char *board0[4];
242 static char *board1[4];
243 static char *board2[4];
244 static char *board3[4];
245
246 static char **stl_brdsp[] = {
247 (char **) &board0,
248 (char **) &board1,
249 (char **) &board2,
250 (char **) &board3
251 };
252
253 /*
254 * Define a set of common board names, and types. This is used to
255 * parse any module arguments.
256 */
257
258 typedef struct stlbrdtype {
259 char *name;
260 int type;
261 } stlbrdtype_t;
262
263 static stlbrdtype_t stl_brdstr[] = {
264 { "easyio", BRD_EASYIO },
265 { "eio", BRD_EASYIO },
266 { "20", BRD_EASYIO },
267 { "ec8/32", BRD_ECH },
268 { "ec8/32-at", BRD_ECH },
269 { "ec8/32-isa", BRD_ECH },
270 { "ech", BRD_ECH },
271 { "echat", BRD_ECH },
272 { "21", BRD_ECH },
273 { "ec8/32-mc", BRD_ECHMC },
274 { "ec8/32-mca", BRD_ECHMC },
275 { "echmc", BRD_ECHMC },
276 { "echmca", BRD_ECHMC },
277 { "22", BRD_ECHMC },
278 { "ec8/32-pc", BRD_ECHPCI },
279 { "ec8/32-pci", BRD_ECHPCI },
280 { "26", BRD_ECHPCI },
281 { "ec8/64-pc", BRD_ECH64PCI },
282 { "ec8/64-pci", BRD_ECH64PCI },
283 { "ech-pci", BRD_ECH64PCI },
284 { "echpci", BRD_ECH64PCI },
285 { "echpc", BRD_ECH64PCI },
286 { "27", BRD_ECH64PCI },
287 { "easyio-pc", BRD_EASYIOPCI },
288 { "easyio-pci", BRD_EASYIOPCI },
289 { "eio-pci", BRD_EASYIOPCI },
290 { "eiopci", BRD_EASYIOPCI },
291 { "28", BRD_EASYIOPCI },
292 };
293
294 /*
295 * Define the module agruments.
296 */
297 MODULE_AUTHOR("Greg Ungerer");
298 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
299 MODULE_LICENSE("GPL");
300
301 module_param_array(board0, charp, &stl_nargs, 0);
302 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
303 module_param_array(board1, charp, &stl_nargs, 0);
304 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
305 module_param_array(board2, charp, &stl_nargs, 0);
306 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
307 module_param_array(board3, charp, &stl_nargs, 0);
308 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
309
310 /*****************************************************************************/
311
312 /*
313 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
314 * to the directly accessible io ports of these boards (not the uarts -
315 * they are in cd1400.h and sc26198.h).
316 */
317 #define EIO_8PORTRS 0x04
318 #define EIO_4PORTRS 0x05
319 #define EIO_8PORTDI 0x00
320 #define EIO_8PORTM 0x06
321 #define EIO_MK3 0x03
322 #define EIO_IDBITMASK 0x07
323
324 #define EIO_BRDMASK 0xf0
325 #define ID_BRD4 0x10
326 #define ID_BRD8 0x20
327 #define ID_BRD16 0x30
328
329 #define EIO_INTRPEND 0x08
330 #define EIO_INTEDGE 0x00
331 #define EIO_INTLEVEL 0x08
332 #define EIO_0WS 0x10
333
334 #define ECH_ID 0xa0
335 #define ECH_IDBITMASK 0xe0
336 #define ECH_BRDENABLE 0x08
337 #define ECH_BRDDISABLE 0x00
338 #define ECH_INTENABLE 0x01
339 #define ECH_INTDISABLE 0x00
340 #define ECH_INTLEVEL 0x02
341 #define ECH_INTEDGE 0x00
342 #define ECH_INTRPEND 0x01
343 #define ECH_BRDRESET 0x01
344
345 #define ECHMC_INTENABLE 0x01
346 #define ECHMC_BRDRESET 0x02
347
348 #define ECH_PNLSTATUS 2
349 #define ECH_PNL16PORT 0x20
350 #define ECH_PNLIDMASK 0x07
351 #define ECH_PNLXPID 0x40
352 #define ECH_PNLINTRPEND 0x80
353
354 #define ECH_ADDR2MASK 0x1e0
355
356 /*
357 * Define the vector mapping bits for the programmable interrupt board
358 * hardware. These bits encode the interrupt for the board to use - it
359 * is software selectable (except the EIO-8M).
360 */
361 static unsigned char stl_vecmap[] = {
362 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
363 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
364 };
365
366 /*
367 * Set up enable and disable macros for the ECH boards. They require
368 * the secondary io address space to be activated and deactivated.
369 * This way all ECH boards can share their secondary io region.
370 * If this is an ECH-PCI board then also need to set the page pointer
371 * to point to the correct page.
372 */
373 #define BRDENABLE(brdnr,pagenr) \
374 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
375 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
376 stl_brds[(brdnr)]->ioctrl); \
377 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
378 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
379
380 #define BRDDISABLE(brdnr) \
381 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
382 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
383 stl_brds[(brdnr)]->ioctrl);
384
385 #define STL_CD1400MAXBAUD 230400
386 #define STL_SC26198MAXBAUD 460800
387
388 #define STL_BAUDBASE 115200
389 #define STL_CLOSEDELAY (5 * HZ / 10)
390
391 /*****************************************************************************/
392
393 #ifdef CONFIG_PCI
394
395 /*
396 * Define the Stallion PCI vendor and device IDs.
397 */
398 #ifndef PCI_VENDOR_ID_STALLION
399 #define PCI_VENDOR_ID_STALLION 0x124d
400 #endif
401 #ifndef PCI_DEVICE_ID_ECHPCI832
402 #define PCI_DEVICE_ID_ECHPCI832 0x0000
403 #endif
404 #ifndef PCI_DEVICE_ID_ECHPCI864
405 #define PCI_DEVICE_ID_ECHPCI864 0x0002
406 #endif
407 #ifndef PCI_DEVICE_ID_EIOPCI
408 #define PCI_DEVICE_ID_EIOPCI 0x0003
409 #endif
410
411 /*
412 * Define structure to hold all Stallion PCI boards.
413 */
414 typedef struct stlpcibrd {
415 unsigned short vendid;
416 unsigned short devid;
417 int brdtype;
418 } stlpcibrd_t;
419
420 static stlpcibrd_t stl_pcibrds[] = {
421 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI },
422 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI },
423 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI },
424 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI },
425 };
426
427 static int stl_nrpcibrds = sizeof(stl_pcibrds) / sizeof(stlpcibrd_t);
428
429 #endif
430
431 /*****************************************************************************/
432
433 /*
434 * Define macros to extract a brd/port number from a minor number.
435 */
436 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
437 #define MINOR2PORT(min) ((min) & 0x3f)
438
439 /*
440 * Define a baud rate table that converts termios baud rate selector
441 * into the actual baud rate value. All baud rate calculations are
442 * based on the actual baud rate required.
443 */
444 static unsigned int stl_baudrates[] = {
445 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
446 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
447 };
448
449 /*
450 * Define some handy local macros...
451 */
452 #undef MIN
453 #define MIN(a,b) (((a) <= (b)) ? (a) : (b))
454
455 #undef TOLOWER
456 #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
457
458 /*****************************************************************************/
459
460 /*
461 * Declare all those functions in this driver!
462 */
463
464 static void stl_argbrds(void);
465 static int stl_parsebrd(stlconf_t *confp, char **argp);
466
467 static unsigned long stl_atol(char *str);
468
469 static int stl_init(void);
470 static int stl_open(struct tty_struct *tty, struct file *filp);
471 static void stl_close(struct tty_struct *tty, struct file *filp);
472 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count);
473 static void stl_putchar(struct tty_struct *tty, unsigned char ch);
474 static void stl_flushchars(struct tty_struct *tty);
475 static int stl_writeroom(struct tty_struct *tty);
476 static int stl_charsinbuffer(struct tty_struct *tty);
477 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
478 static void stl_settermios(struct tty_struct *tty, struct termios *old);
479 static void stl_throttle(struct tty_struct *tty);
480 static void stl_unthrottle(struct tty_struct *tty);
481 static void stl_stop(struct tty_struct *tty);
482 static void stl_start(struct tty_struct *tty);
483 static void stl_flushbuffer(struct tty_struct *tty);
484 static void stl_breakctl(struct tty_struct *tty, int state);
485 static void stl_waituntilsent(struct tty_struct *tty, int timeout);
486 static void stl_sendxchar(struct tty_struct *tty, char ch);
487 static void stl_hangup(struct tty_struct *tty);
488 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
489 static int stl_portinfo(stlport_t *portp, int portnr, char *pos);
490 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data);
491
492 static int stl_brdinit(stlbrd_t *brdp);
493 static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp);
494 static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp);
495 static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp);
496 static int stl_getbrdstats(combrd_t __user *bp);
497 static int stl_getportstats(stlport_t *portp, comstats_t __user *cp);
498 static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp);
499 static int stl_getportstruct(stlport_t __user *arg);
500 static int stl_getbrdstruct(stlbrd_t __user *arg);
501 static int stl_waitcarrier(stlport_t *portp, struct file *filp);
502 static int stl_eiointr(stlbrd_t *brdp);
503 static int stl_echatintr(stlbrd_t *brdp);
504 static int stl_echmcaintr(stlbrd_t *brdp);
505 static int stl_echpciintr(stlbrd_t *brdp);
506 static int stl_echpci64intr(stlbrd_t *brdp);
507 static void stl_offintr(void *private);
508 static void *stl_memalloc(int len);
509 static stlbrd_t *stl_allocbrd(void);
510 static stlport_t *stl_getport(int brdnr, int panelnr, int portnr);
511
512 static inline int stl_initbrds(void);
513 static inline int stl_initeio(stlbrd_t *brdp);
514 static inline int stl_initech(stlbrd_t *brdp);
515 static inline int stl_getbrdnr(void);
516
517 #ifdef CONFIG_PCI
518 static inline int stl_findpcibrds(void);
519 static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp);
520 #endif
521
522 /*
523 * CD1400 uart specific handling functions.
524 */
525 static void stl_cd1400setreg(stlport_t *portp, int regnr, int value);
526 static int stl_cd1400getreg(stlport_t *portp, int regnr);
527 static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value);
528 static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
529 static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
530 static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp);
531 static int stl_cd1400getsignals(stlport_t *portp);
532 static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts);
533 static void stl_cd1400ccrwait(stlport_t *portp);
534 static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx);
535 static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx);
536 static void stl_cd1400disableintrs(stlport_t *portp);
537 static void stl_cd1400sendbreak(stlport_t *portp, int len);
538 static void stl_cd1400flowctrl(stlport_t *portp, int state);
539 static void stl_cd1400sendflow(stlport_t *portp, int state);
540 static void stl_cd1400flush(stlport_t *portp);
541 static int stl_cd1400datastate(stlport_t *portp);
542 static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase);
543 static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase);
544 static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr);
545 static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr);
546 static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr);
547
548 static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr);
549
550 /*
551 * SC26198 uart specific handling functions.
552 */
553 static void stl_sc26198setreg(stlport_t *portp, int regnr, int value);
554 static int stl_sc26198getreg(stlport_t *portp, int regnr);
555 static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value);
556 static int stl_sc26198getglobreg(stlport_t *portp, int regnr);
557 static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
558 static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
559 static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp);
560 static int stl_sc26198getsignals(stlport_t *portp);
561 static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts);
562 static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx);
563 static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx);
564 static void stl_sc26198disableintrs(stlport_t *portp);
565 static void stl_sc26198sendbreak(stlport_t *portp, int len);
566 static void stl_sc26198flowctrl(stlport_t *portp, int state);
567 static void stl_sc26198sendflow(stlport_t *portp, int state);
568 static void stl_sc26198flush(stlport_t *portp);
569 static int stl_sc26198datastate(stlport_t *portp);
570 static void stl_sc26198wait(stlport_t *portp);
571 static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty);
572 static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase);
573 static void stl_sc26198txisr(stlport_t *port);
574 static void stl_sc26198rxisr(stlport_t *port, unsigned int iack);
575 static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch);
576 static void stl_sc26198rxbadchars(stlport_t *portp);
577 static void stl_sc26198otherisr(stlport_t *port, unsigned int iack);
578
579 /*****************************************************************************/
580
581 /*
582 * Generic UART support structure.
583 */
584 typedef struct uart {
585 int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp);
586 void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
587 void (*setport)(stlport_t *portp, struct termios *tiosp);
588 int (*getsignals)(stlport_t *portp);
589 void (*setsignals)(stlport_t *portp, int dtr, int rts);
590 void (*enablerxtx)(stlport_t *portp, int rx, int tx);
591 void (*startrxtx)(stlport_t *portp, int rx, int tx);
592 void (*disableintrs)(stlport_t *portp);
593 void (*sendbreak)(stlport_t *portp, int len);
594 void (*flowctrl)(stlport_t *portp, int state);
595 void (*sendflow)(stlport_t *portp, int state);
596 void (*flush)(stlport_t *portp);
597 int (*datastate)(stlport_t *portp);
598 void (*intr)(stlpanel_t *panelp, unsigned int iobase);
599 } uart_t;
600
601 /*
602 * Define some macros to make calling these functions nice and clean.
603 */
604 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
605 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
606 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
607 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
608 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
609 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
610 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
611 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
612 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
613 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
614 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
615 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
616 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
617
618 /*****************************************************************************/
619
620 /*
621 * CD1400 UART specific data initialization.
622 */
623 static uart_t stl_cd1400uart = {
624 stl_cd1400panelinit,
625 stl_cd1400portinit,
626 stl_cd1400setport,
627 stl_cd1400getsignals,
628 stl_cd1400setsignals,
629 stl_cd1400enablerxtx,
630 stl_cd1400startrxtx,
631 stl_cd1400disableintrs,
632 stl_cd1400sendbreak,
633 stl_cd1400flowctrl,
634 stl_cd1400sendflow,
635 stl_cd1400flush,
636 stl_cd1400datastate,
637 stl_cd1400eiointr
638 };
639
640 /*
641 * Define the offsets within the register bank of a cd1400 based panel.
642 * These io address offsets are common to the EasyIO board as well.
643 */
644 #define EREG_ADDR 0
645 #define EREG_DATA 4
646 #define EREG_RXACK 5
647 #define EREG_TXACK 6
648 #define EREG_MDACK 7
649
650 #define EREG_BANKSIZE 8
651
652 #define CD1400_CLK 25000000
653 #define CD1400_CLK8M 20000000
654
655 /*
656 * Define the cd1400 baud rate clocks. These are used when calculating
657 * what clock and divisor to use for the required baud rate. Also
658 * define the maximum baud rate allowed, and the default base baud.
659 */
660 static int stl_cd1400clkdivs[] = {
661 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
662 };
663
664 /*****************************************************************************/
665
666 /*
667 * SC26198 UART specific data initization.
668 */
669 static uart_t stl_sc26198uart = {
670 stl_sc26198panelinit,
671 stl_sc26198portinit,
672 stl_sc26198setport,
673 stl_sc26198getsignals,
674 stl_sc26198setsignals,
675 stl_sc26198enablerxtx,
676 stl_sc26198startrxtx,
677 stl_sc26198disableintrs,
678 stl_sc26198sendbreak,
679 stl_sc26198flowctrl,
680 stl_sc26198sendflow,
681 stl_sc26198flush,
682 stl_sc26198datastate,
683 stl_sc26198intr
684 };
685
686 /*
687 * Define the offsets within the register bank of a sc26198 based panel.
688 */
689 #define XP_DATA 0
690 #define XP_ADDR 1
691 #define XP_MODID 2
692 #define XP_STATUS 2
693 #define XP_IACK 3
694
695 #define XP_BANKSIZE 4
696
697 /*
698 * Define the sc26198 baud rate table. Offsets within the table
699 * represent the actual baud rate selector of sc26198 registers.
700 */
701 static unsigned int sc26198_baudtable[] = {
702 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
703 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
704 230400, 460800, 921600
705 };
706
707 #define SC26198_NRBAUDS (sizeof(sc26198_baudtable) / sizeof(unsigned int))
708
709 /*****************************************************************************/
710
711 /*
712 * Define the driver info for a user level control device. Used mainly
713 * to get at port stats - only not using the port device itself.
714 */
715 static struct file_operations stl_fsiomem = {
716 .owner = THIS_MODULE,
717 .ioctl = stl_memioctl,
718 };
719
720 /*****************************************************************************/
721
722 static struct class *stallion_class;
723
724 /*
725 * Loadable module initialization stuff.
726 */
727
728 static int __init stallion_module_init(void)
729 {
730 unsigned long flags;
731
732 #ifdef DEBUG
733 printk("init_module()\n");
734 #endif
735
736 save_flags(flags);
737 cli();
738 stl_init();
739 restore_flags(flags);
740
741 return(0);
742 }
743
744 /*****************************************************************************/
745
746 static void __exit stallion_module_exit(void)
747 {
748 stlbrd_t *brdp;
749 stlpanel_t *panelp;
750 stlport_t *portp;
751 unsigned long flags;
752 int i, j, k;
753
754 #ifdef DEBUG
755 printk("cleanup_module()\n");
756 #endif
757
758 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
759 stl_drvversion);
760
761 save_flags(flags);
762 cli();
763
764 /*
765 * Free up all allocated resources used by the ports. This includes
766 * memory and interrupts. As part of this process we will also do
767 * a hangup on every open port - to try to flush out any processes
768 * hanging onto ports.
769 */
770 i = tty_unregister_driver(stl_serial);
771 put_tty_driver(stl_serial);
772 if (i) {
773 printk("STALLION: failed to un-register tty driver, "
774 "errno=%d\n", -i);
775 restore_flags(flags);
776 return;
777 }
778 for (i = 0; i < 4; i++) {
779 devfs_remove("staliomem/%d", i);
780 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
781 }
782 devfs_remove("staliomem");
783 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
784 printk("STALLION: failed to un-register serial memory device, "
785 "errno=%d\n", -i);
786 class_destroy(stallion_class);
787
788 kfree(stl_tmpwritebuf);
789
790 for (i = 0; (i < stl_nrbrds); i++) {
791 if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL)
792 continue;
793
794 free_irq(brdp->irq, brdp);
795
796 for (j = 0; (j < STL_MAXPANELS); j++) {
797 panelp = brdp->panels[j];
798 if (panelp == (stlpanel_t *) NULL)
799 continue;
800 for (k = 0; (k < STL_PORTSPERPANEL); k++) {
801 portp = panelp->ports[k];
802 if (portp == (stlport_t *) NULL)
803 continue;
804 if (portp->tty != (struct tty_struct *) NULL)
805 stl_hangup(portp->tty);
806 kfree(portp->tx.buf);
807 kfree(portp);
808 }
809 kfree(panelp);
810 }
811
812 release_region(brdp->ioaddr1, brdp->iosize1);
813 if (brdp->iosize2 > 0)
814 release_region(brdp->ioaddr2, brdp->iosize2);
815
816 kfree(brdp);
817 stl_brds[i] = (stlbrd_t *) NULL;
818 }
819
820 restore_flags(flags);
821 }
822
823 module_init(stallion_module_init);
824 module_exit(stallion_module_exit);
825
826 /*****************************************************************************/
827
828 /*
829 * Check for any arguments passed in on the module load command line.
830 */
831
832 static void stl_argbrds(void)
833 {
834 stlconf_t conf;
835 stlbrd_t *brdp;
836 int i;
837
838 #ifdef DEBUG
839 printk("stl_argbrds()\n");
840 #endif
841
842 for (i = stl_nrbrds; (i < stl_nargs); i++) {
843 memset(&conf, 0, sizeof(conf));
844 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
845 continue;
846 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
847 continue;
848 stl_nrbrds = i + 1;
849 brdp->brdnr = i;
850 brdp->brdtype = conf.brdtype;
851 brdp->ioaddr1 = conf.ioaddr1;
852 brdp->ioaddr2 = conf.ioaddr2;
853 brdp->irq = conf.irq;
854 brdp->irqtype = conf.irqtype;
855 stl_brdinit(brdp);
856 }
857 }
858
859 /*****************************************************************************/
860
861 /*
862 * Convert an ascii string number into an unsigned long.
863 */
864
865 static unsigned long stl_atol(char *str)
866 {
867 unsigned long val;
868 int base, c;
869 char *sp;
870
871 val = 0;
872 sp = str;
873 if ((*sp == '0') && (*(sp+1) == 'x')) {
874 base = 16;
875 sp += 2;
876 } else if (*sp == '0') {
877 base = 8;
878 sp++;
879 } else {
880 base = 10;
881 }
882
883 for (; (*sp != 0); sp++) {
884 c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
885 if ((c < 0) || (c >= base)) {
886 printk("STALLION: invalid argument %s\n", str);
887 val = 0;
888 break;
889 }
890 val = (val * base) + c;
891 }
892 return(val);
893 }
894
895 /*****************************************************************************/
896
897 /*
898 * Parse the supplied argument string, into the board conf struct.
899 */
900
901 static int stl_parsebrd(stlconf_t *confp, char **argp)
902 {
903 char *sp;
904 int nrbrdnames, i;
905
906 #ifdef DEBUG
907 printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp);
908 #endif
909
910 if ((argp[0] == (char *) NULL) || (*argp[0] == 0))
911 return(0);
912
913 for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
914 *sp = TOLOWER(*sp);
915
916 nrbrdnames = sizeof(stl_brdstr) / sizeof(stlbrdtype_t);
917 for (i = 0; (i < nrbrdnames); i++) {
918 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
919 break;
920 }
921 if (i >= nrbrdnames) {
922 printk("STALLION: unknown board name, %s?\n", argp[0]);
923 return(0);
924 }
925
926 confp->brdtype = stl_brdstr[i].type;
927
928 i = 1;
929 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
930 confp->ioaddr1 = stl_atol(argp[i]);
931 i++;
932 if (confp->brdtype == BRD_ECH) {
933 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
934 confp->ioaddr2 = stl_atol(argp[i]);
935 i++;
936 }
937 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
938 confp->irq = stl_atol(argp[i]);
939 return(1);
940 }
941
942 /*****************************************************************************/
943
944 /*
945 * Local driver kernel memory allocation routine.
946 */
947
948 static void *stl_memalloc(int len)
949 {
950 return((void *) kmalloc(len, GFP_KERNEL));
951 }
952
953 /*****************************************************************************/
954
955 /*
956 * Allocate a new board structure. Fill out the basic info in it.
957 */
958
959 static stlbrd_t *stl_allocbrd(void)
960 {
961 stlbrd_t *brdp;
962
963 brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t));
964 if (brdp == (stlbrd_t *) NULL) {
965 printk("STALLION: failed to allocate memory (size=%d)\n",
966 sizeof(stlbrd_t));
967 return((stlbrd_t *) NULL);
968 }
969
970 memset(brdp, 0, sizeof(stlbrd_t));
971 brdp->magic = STL_BOARDMAGIC;
972 return(brdp);
973 }
974
975 /*****************************************************************************/
976
977 static int stl_open(struct tty_struct *tty, struct file *filp)
978 {
979 stlport_t *portp;
980 stlbrd_t *brdp;
981 unsigned int minordev;
982 int brdnr, panelnr, portnr, rc;
983
984 #ifdef DEBUG
985 printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty,
986 (int) filp, tty->name);
987 #endif
988
989 minordev = tty->index;
990 brdnr = MINOR2BRD(minordev);
991 if (brdnr >= stl_nrbrds)
992 return(-ENODEV);
993 brdp = stl_brds[brdnr];
994 if (brdp == (stlbrd_t *) NULL)
995 return(-ENODEV);
996 minordev = MINOR2PORT(minordev);
997 for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
998 if (brdp->panels[panelnr] == (stlpanel_t *) NULL)
999 break;
1000 if (minordev < brdp->panels[panelnr]->nrports) {
1001 portnr = minordev;
1002 break;
1003 }
1004 minordev -= brdp->panels[panelnr]->nrports;
1005 }
1006 if (portnr < 0)
1007 return(-ENODEV);
1008
1009 portp = brdp->panels[panelnr]->ports[portnr];
1010 if (portp == (stlport_t *) NULL)
1011 return(-ENODEV);
1012
1013 /*
1014 * On the first open of the device setup the port hardware, and
1015 * initialize the per port data structure.
1016 */
1017 portp->tty = tty;
1018 tty->driver_data = portp;
1019 portp->refcount++;
1020
1021 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
1022 if (portp->tx.buf == (char *) NULL) {
1023 portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE);
1024 if (portp->tx.buf == (char *) NULL)
1025 return(-ENOMEM);
1026 portp->tx.head = portp->tx.buf;
1027 portp->tx.tail = portp->tx.buf;
1028 }
1029 stl_setport(portp, tty->termios);
1030 portp->sigs = stl_getsignals(portp);
1031 stl_setsignals(portp, 1, 1);
1032 stl_enablerxtx(portp, 1, 1);
1033 stl_startrxtx(portp, 1, 0);
1034 clear_bit(TTY_IO_ERROR, &tty->flags);
1035 portp->flags |= ASYNC_INITIALIZED;
1036 }
1037
1038 /*
1039 * Check if this port is in the middle of closing. If so then wait
1040 * until it is closed then return error status, based on flag settings.
1041 * The sleep here does not need interrupt protection since the wakeup
1042 * for it is done with the same context.
1043 */
1044 if (portp->flags & ASYNC_CLOSING) {
1045 interruptible_sleep_on(&portp->close_wait);
1046 if (portp->flags & ASYNC_HUP_NOTIFY)
1047 return(-EAGAIN);
1048 return(-ERESTARTSYS);
1049 }
1050
1051 /*
1052 * Based on type of open being done check if it can overlap with any
1053 * previous opens still in effect. If we are a normal serial device
1054 * then also we might have to wait for carrier.
1055 */
1056 if (!(filp->f_flags & O_NONBLOCK)) {
1057 if ((rc = stl_waitcarrier(portp, filp)) != 0)
1058 return(rc);
1059 }
1060 portp->flags |= ASYNC_NORMAL_ACTIVE;
1061
1062 return(0);
1063 }
1064
1065 /*****************************************************************************/
1066
1067 /*
1068 * Possibly need to wait for carrier (DCD signal) to come high. Say
1069 * maybe because if we are clocal then we don't need to wait...
1070 */
1071
1072 static int stl_waitcarrier(stlport_t *portp, struct file *filp)
1073 {
1074 unsigned long flags;
1075 int rc, doclocal;
1076
1077 #ifdef DEBUG
1078 printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp);
1079 #endif
1080
1081 rc = 0;
1082 doclocal = 0;
1083
1084 if (portp->tty->termios->c_cflag & CLOCAL)
1085 doclocal++;
1086
1087 save_flags(flags);
1088 cli();
1089 portp->openwaitcnt++;
1090 if (! tty_hung_up_p(filp))
1091 portp->refcount--;
1092
1093 for (;;) {
1094 stl_setsignals(portp, 1, 1);
1095 if (tty_hung_up_p(filp) ||
1096 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
1097 if (portp->flags & ASYNC_HUP_NOTIFY)
1098 rc = -EBUSY;
1099 else
1100 rc = -ERESTARTSYS;
1101 break;
1102 }
1103 if (((portp->flags & ASYNC_CLOSING) == 0) &&
1104 (doclocal || (portp->sigs & TIOCM_CD))) {
1105 break;
1106 }
1107 if (signal_pending(current)) {
1108 rc = -ERESTARTSYS;
1109 break;
1110 }
1111 interruptible_sleep_on(&portp->open_wait);
1112 }
1113
1114 if (! tty_hung_up_p(filp))
1115 portp->refcount++;
1116 portp->openwaitcnt--;
1117 restore_flags(flags);
1118
1119 return(rc);
1120 }
1121
1122 /*****************************************************************************/
1123
1124 static void stl_close(struct tty_struct *tty, struct file *filp)
1125 {
1126 stlport_t *portp;
1127 unsigned long flags;
1128
1129 #ifdef DEBUG
1130 printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
1131 #endif
1132
1133 portp = tty->driver_data;
1134 if (portp == (stlport_t *) NULL)
1135 return;
1136
1137 save_flags(flags);
1138 cli();
1139 if (tty_hung_up_p(filp)) {
1140 restore_flags(flags);
1141 return;
1142 }
1143 if ((tty->count == 1) && (portp->refcount != 1))
1144 portp->refcount = 1;
1145 if (portp->refcount-- > 1) {
1146 restore_flags(flags);
1147 return;
1148 }
1149
1150 portp->refcount = 0;
1151 portp->flags |= ASYNC_CLOSING;
1152
1153 /*
1154 * May want to wait for any data to drain before closing. The BUSY
1155 * flag keeps track of whether we are still sending or not - it is
1156 * very accurate for the cd1400, not quite so for the sc26198.
1157 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
1158 */
1159 tty->closing = 1;
1160 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1161 tty_wait_until_sent(tty, portp->closing_wait);
1162 stl_waituntilsent(tty, (HZ / 2));
1163
1164 portp->flags &= ~ASYNC_INITIALIZED;
1165 stl_disableintrs(portp);
1166 if (tty->termios->c_cflag & HUPCL)
1167 stl_setsignals(portp, 0, 0);
1168 stl_enablerxtx(portp, 0, 0);
1169 stl_flushbuffer(tty);
1170 portp->istate = 0;
1171 if (portp->tx.buf != (char *) NULL) {
1172 kfree(portp->tx.buf);
1173 portp->tx.buf = (char *) NULL;
1174 portp->tx.head = (char *) NULL;
1175 portp->tx.tail = (char *) NULL;
1176 }
1177 set_bit(TTY_IO_ERROR, &tty->flags);
1178 tty_ldisc_flush(tty);
1179
1180 tty->closing = 0;
1181 portp->tty = (struct tty_struct *) NULL;
1182
1183 if (portp->openwaitcnt) {
1184 if (portp->close_delay)
1185 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
1186 wake_up_interruptible(&portp->open_wait);
1187 }
1188
1189 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1190 wake_up_interruptible(&portp->close_wait);
1191 restore_flags(flags);
1192 }
1193
1194 /*****************************************************************************/
1195
1196 /*
1197 * Write routine. Take data and stuff it in to the TX ring queue.
1198 * If transmit interrupts are not running then start them.
1199 */
1200
1201 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
1202 {
1203 stlport_t *portp;
1204 unsigned int len, stlen;
1205 unsigned char *chbuf;
1206 char *head, *tail;
1207
1208 #ifdef DEBUG
1209 printk("stl_write(tty=%x,buf=%x,count=%d)\n",
1210 (int) tty, (int) buf, count);
1211 #endif
1212
1213 if ((tty == (struct tty_struct *) NULL) ||
1214 (stl_tmpwritebuf == (char *) NULL))
1215 return(0);
1216 portp = tty->driver_data;
1217 if (portp == (stlport_t *) NULL)
1218 return(0);
1219 if (portp->tx.buf == (char *) NULL)
1220 return(0);
1221
1222 /*
1223 * If copying direct from user space we must cater for page faults,
1224 * causing us to "sleep" here for a while. To handle this copy in all
1225 * the data we need now, into a local buffer. Then when we got it all
1226 * copy it into the TX buffer.
1227 */
1228 chbuf = (unsigned char *) buf;
1229
1230 head = portp->tx.head;
1231 tail = portp->tx.tail;
1232 if (head >= tail) {
1233 len = STL_TXBUFSIZE - (head - tail) - 1;
1234 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
1235 } else {
1236 len = tail - head - 1;
1237 stlen = len;
1238 }
1239
1240 len = MIN(len, count);
1241 count = 0;
1242 while (len > 0) {
1243 stlen = MIN(len, stlen);
1244 memcpy(head, chbuf, stlen);
1245 len -= stlen;
1246 chbuf += stlen;
1247 count += stlen;
1248 head += stlen;
1249 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1250 head = portp->tx.buf;
1251 stlen = tail - head;
1252 }
1253 }
1254 portp->tx.head = head;
1255
1256 clear_bit(ASYI_TXLOW, &portp->istate);
1257 stl_startrxtx(portp, -1, 1);
1258
1259 return(count);
1260 }
1261
1262 /*****************************************************************************/
1263
1264 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1265 {
1266 stlport_t *portp;
1267 unsigned int len;
1268 char *head, *tail;
1269
1270 #ifdef DEBUG
1271 printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
1272 #endif
1273
1274 if (tty == (struct tty_struct *) NULL)
1275 return;
1276 portp = tty->driver_data;
1277 if (portp == (stlport_t *) NULL)
1278 return;
1279 if (portp->tx.buf == (char *) NULL)
1280 return;
1281
1282 head = portp->tx.head;
1283 tail = portp->tx.tail;
1284
1285 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1286 len--;
1287
1288 if (len > 0) {
1289 *head++ = ch;
1290 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1291 head = portp->tx.buf;
1292 }
1293 portp->tx.head = head;
1294 }
1295
1296 /*****************************************************************************/
1297
1298 /*
1299 * If there are any characters in the buffer then make sure that TX
1300 * interrupts are on and get'em out. Normally used after the putchar
1301 * routine has been called.
1302 */
1303
1304 static void stl_flushchars(struct tty_struct *tty)
1305 {
1306 stlport_t *portp;
1307
1308 #ifdef DEBUG
1309 printk("stl_flushchars(tty=%x)\n", (int) tty);
1310 #endif
1311
1312 if (tty == (struct tty_struct *) NULL)
1313 return;
1314 portp = tty->driver_data;
1315 if (portp == (stlport_t *) NULL)
1316 return;
1317 if (portp->tx.buf == (char *) NULL)
1318 return;
1319
1320 #if 0
1321 if (tty->stopped || tty->hw_stopped ||
1322 (portp->tx.head == portp->tx.tail))
1323 return;
1324 #endif
1325 stl_startrxtx(portp, -1, 1);
1326 }
1327
1328 /*****************************************************************************/
1329
1330 static int stl_writeroom(struct tty_struct *tty)
1331 {
1332 stlport_t *portp;
1333 char *head, *tail;
1334
1335 #ifdef DEBUG
1336 printk("stl_writeroom(tty=%x)\n", (int) tty);
1337 #endif
1338
1339 if (tty == (struct tty_struct *) NULL)
1340 return(0);
1341 portp = tty->driver_data;
1342 if (portp == (stlport_t *) NULL)
1343 return(0);
1344 if (portp->tx.buf == (char *) NULL)
1345 return(0);
1346
1347 head = portp->tx.head;
1348 tail = portp->tx.tail;
1349 return((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
1350 }
1351
1352 /*****************************************************************************/
1353
1354 /*
1355 * Return number of chars in the TX buffer. Normally we would just
1356 * calculate the number of chars in the buffer and return that, but if
1357 * the buffer is empty and TX interrupts are still on then we return
1358 * that the buffer still has 1 char in it. This way whoever called us
1359 * will not think that ALL chars have drained - since the UART still
1360 * must have some chars in it (we are busy after all).
1361 */
1362
1363 static int stl_charsinbuffer(struct tty_struct *tty)
1364 {
1365 stlport_t *portp;
1366 unsigned int size;
1367 char *head, *tail;
1368
1369 #ifdef DEBUG
1370 printk("stl_charsinbuffer(tty=%x)\n", (int) tty);
1371 #endif
1372
1373 if (tty == (struct tty_struct *) NULL)
1374 return(0);
1375 portp = tty->driver_data;
1376 if (portp == (stlport_t *) NULL)
1377 return(0);
1378 if (portp->tx.buf == (char *) NULL)
1379 return(0);
1380
1381 head = portp->tx.head;
1382 tail = portp->tx.tail;
1383 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1384 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1385 size = 1;
1386 return(size);
1387 }
1388
1389 /*****************************************************************************/
1390
1391 /*
1392 * Generate the serial struct info.
1393 */
1394
1395 static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp)
1396 {
1397 struct serial_struct sio;
1398 stlbrd_t *brdp;
1399
1400 #ifdef DEBUG
1401 printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1402 #endif
1403
1404 memset(&sio, 0, sizeof(struct serial_struct));
1405 sio.line = portp->portnr;
1406 sio.port = portp->ioaddr;
1407 sio.flags = portp->flags;
1408 sio.baud_base = portp->baud_base;
1409 sio.close_delay = portp->close_delay;
1410 sio.closing_wait = portp->closing_wait;
1411 sio.custom_divisor = portp->custom_divisor;
1412 sio.hub6 = 0;
1413 if (portp->uartp == &stl_cd1400uart) {
1414 sio.type = PORT_CIRRUS;
1415 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1416 } else {
1417 sio.type = PORT_UNKNOWN;
1418 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1419 }
1420
1421 brdp = stl_brds[portp->brdnr];
1422 if (brdp != (stlbrd_t *) NULL)
1423 sio.irq = brdp->irq;
1424
1425 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1426 }
1427
1428 /*****************************************************************************/
1429
1430 /*
1431 * Set port according to the serial struct info.
1432 * At this point we do not do any auto-configure stuff, so we will
1433 * just quietly ignore any requests to change irq, etc.
1434 */
1435
1436 static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp)
1437 {
1438 struct serial_struct sio;
1439
1440 #ifdef DEBUG
1441 printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1442 #endif
1443
1444 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1445 return -EFAULT;
1446 if (!capable(CAP_SYS_ADMIN)) {
1447 if ((sio.baud_base != portp->baud_base) ||
1448 (sio.close_delay != portp->close_delay) ||
1449 ((sio.flags & ~ASYNC_USR_MASK) !=
1450 (portp->flags & ~ASYNC_USR_MASK)))
1451 return(-EPERM);
1452 }
1453
1454 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1455 (sio.flags & ASYNC_USR_MASK);
1456 portp->baud_base = sio.baud_base;
1457 portp->close_delay = sio.close_delay;
1458 portp->closing_wait = sio.closing_wait;
1459 portp->custom_divisor = sio.custom_divisor;
1460 stl_setport(portp, portp->tty->termios);
1461 return(0);
1462 }
1463
1464 /*****************************************************************************/
1465
1466 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1467 {
1468 stlport_t *portp;
1469
1470 if (tty == (struct tty_struct *) NULL)
1471 return(-ENODEV);
1472 portp = tty->driver_data;
1473 if (portp == (stlport_t *) NULL)
1474 return(-ENODEV);
1475 if (tty->flags & (1 << TTY_IO_ERROR))
1476 return(-EIO);
1477
1478 return stl_getsignals(portp);
1479 }
1480
1481 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1482 unsigned int set, unsigned int clear)
1483 {
1484 stlport_t *portp;
1485 int rts = -1, dtr = -1;
1486
1487 if (tty == (struct tty_struct *) NULL)
1488 return(-ENODEV);
1489 portp = tty->driver_data;
1490 if (portp == (stlport_t *) NULL)
1491 return(-ENODEV);
1492 if (tty->flags & (1 << TTY_IO_ERROR))
1493 return(-EIO);
1494
1495 if (set & TIOCM_RTS)
1496 rts = 1;
1497 if (set & TIOCM_DTR)
1498 dtr = 1;
1499 if (clear & TIOCM_RTS)
1500 rts = 0;
1501 if (clear & TIOCM_DTR)
1502 dtr = 0;
1503
1504 stl_setsignals(portp, dtr, rts);
1505 return 0;
1506 }
1507
1508 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1509 {
1510 stlport_t *portp;
1511 unsigned int ival;
1512 int rc;
1513 void __user *argp = (void __user *)arg;
1514
1515 #ifdef DEBUG
1516 printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n",
1517 (int) tty, (int) file, cmd, (int) arg);
1518 #endif
1519
1520 if (tty == (struct tty_struct *) NULL)
1521 return(-ENODEV);
1522 portp = tty->driver_data;
1523 if (portp == (stlport_t *) NULL)
1524 return(-ENODEV);
1525
1526 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1527 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1528 if (tty->flags & (1 << TTY_IO_ERROR))
1529 return(-EIO);
1530 }
1531
1532 rc = 0;
1533
1534 switch (cmd) {
1535 case TIOCGSOFTCAR:
1536 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1537 (unsigned __user *) argp);
1538 break;
1539 case TIOCSSOFTCAR:
1540 if (get_user(ival, (unsigned int __user *) arg))
1541 return -EFAULT;
1542 tty->termios->c_cflag =
1543 (tty->termios->c_cflag & ~CLOCAL) |
1544 (ival ? CLOCAL : 0);
1545 break;
1546 case TIOCGSERIAL:
1547 rc = stl_getserial(portp, argp);
1548 break;
1549 case TIOCSSERIAL:
1550 rc = stl_setserial(portp, argp);
1551 break;
1552 case COM_GETPORTSTATS:
1553 rc = stl_getportstats(portp, argp);
1554 break;
1555 case COM_CLRPORTSTATS:
1556 rc = stl_clrportstats(portp, argp);
1557 break;
1558 case TIOCSERCONFIG:
1559 case TIOCSERGWILD:
1560 case TIOCSERSWILD:
1561 case TIOCSERGETLSR:
1562 case TIOCSERGSTRUCT:
1563 case TIOCSERGETMULTI:
1564 case TIOCSERSETMULTI:
1565 default:
1566 rc = -ENOIOCTLCMD;
1567 break;
1568 }
1569
1570 return(rc);
1571 }
1572
1573 /*****************************************************************************/
1574
1575 static void stl_settermios(struct tty_struct *tty, struct termios *old)
1576 {
1577 stlport_t *portp;
1578 struct termios *tiosp;
1579
1580 #ifdef DEBUG
1581 printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
1582 #endif
1583
1584 if (tty == (struct tty_struct *) NULL)
1585 return;
1586 portp = tty->driver_data;
1587 if (portp == (stlport_t *) NULL)
1588 return;
1589
1590 tiosp = tty->termios;
1591 if ((tiosp->c_cflag == old->c_cflag) &&
1592 (tiosp->c_iflag == old->c_iflag))
1593 return;
1594
1595 stl_setport(portp, tiosp);
1596 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1597 -1);
1598 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1599 tty->hw_stopped = 0;
1600 stl_start(tty);
1601 }
1602 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1603 wake_up_interruptible(&portp->open_wait);
1604 }
1605
1606 /*****************************************************************************/
1607
1608 /*
1609 * Attempt to flow control who ever is sending us data. Based on termios
1610 * settings use software or/and hardware flow control.
1611 */
1612
1613 static void stl_throttle(struct tty_struct *tty)
1614 {
1615 stlport_t *portp;
1616
1617 #ifdef DEBUG
1618 printk("stl_throttle(tty=%x)\n", (int) tty);
1619 #endif
1620
1621 if (tty == (struct tty_struct *) NULL)
1622 return;
1623 portp = tty->driver_data;
1624 if (portp == (stlport_t *) NULL)
1625 return;
1626 stl_flowctrl(portp, 0);
1627 }
1628
1629 /*****************************************************************************/
1630
1631 /*
1632 * Unflow control the device sending us data...
1633 */
1634
1635 static void stl_unthrottle(struct tty_struct *tty)
1636 {
1637 stlport_t *portp;
1638
1639 #ifdef DEBUG
1640 printk("stl_unthrottle(tty=%x)\n", (int) tty);
1641 #endif
1642
1643 if (tty == (struct tty_struct *) NULL)
1644 return;
1645 portp = tty->driver_data;
1646 if (portp == (stlport_t *) NULL)
1647 return;
1648 stl_flowctrl(portp, 1);
1649 }
1650
1651 /*****************************************************************************/
1652
1653 /*
1654 * Stop the transmitter. Basically to do this we will just turn TX
1655 * interrupts off.
1656 */
1657
1658 static void stl_stop(struct tty_struct *tty)
1659 {
1660 stlport_t *portp;
1661
1662 #ifdef DEBUG
1663 printk("stl_stop(tty=%x)\n", (int) tty);
1664 #endif
1665
1666 if (tty == (struct tty_struct *) NULL)
1667 return;
1668 portp = tty->driver_data;
1669 if (portp == (stlport_t *) NULL)
1670 return;
1671 stl_startrxtx(portp, -1, 0);
1672 }
1673
1674 /*****************************************************************************/
1675
1676 /*
1677 * Start the transmitter again. Just turn TX interrupts back on.
1678 */
1679
1680 static void stl_start(struct tty_struct *tty)
1681 {
1682 stlport_t *portp;
1683
1684 #ifdef DEBUG
1685 printk("stl_start(tty=%x)\n", (int) tty);
1686 #endif
1687
1688 if (tty == (struct tty_struct *) NULL)
1689 return;
1690 portp = tty->driver_data;
1691 if (portp == (stlport_t *) NULL)
1692 return;
1693 stl_startrxtx(portp, -1, 1);
1694 }
1695
1696 /*****************************************************************************/
1697
1698 /*
1699 * Hangup this port. This is pretty much like closing the port, only
1700 * a little more brutal. No waiting for data to drain. Shutdown the
1701 * port and maybe drop signals.
1702 */
1703
1704 static void stl_hangup(struct tty_struct *tty)
1705 {
1706 stlport_t *portp;
1707
1708 #ifdef DEBUG
1709 printk("stl_hangup(tty=%x)\n", (int) tty);
1710 #endif
1711
1712 if (tty == (struct tty_struct *) NULL)
1713 return;
1714 portp = tty->driver_data;
1715 if (portp == (stlport_t *) NULL)
1716 return;
1717
1718 portp->flags &= ~ASYNC_INITIALIZED;
1719 stl_disableintrs(portp);
1720 if (tty->termios->c_cflag & HUPCL)
1721 stl_setsignals(portp, 0, 0);
1722 stl_enablerxtx(portp, 0, 0);
1723 stl_flushbuffer(tty);
1724 portp->istate = 0;
1725 set_bit(TTY_IO_ERROR, &tty->flags);
1726 if (portp->tx.buf != (char *) NULL) {
1727 kfree(portp->tx.buf);
1728 portp->tx.buf = (char *) NULL;
1729 portp->tx.head = (char *) NULL;
1730 portp->tx.tail = (char *) NULL;
1731 }
1732 portp->tty = (struct tty_struct *) NULL;
1733 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1734 portp->refcount = 0;
1735 wake_up_interruptible(&portp->open_wait);
1736 }
1737
1738 /*****************************************************************************/
1739
1740 static void stl_flushbuffer(struct tty_struct *tty)
1741 {
1742 stlport_t *portp;
1743
1744 #ifdef DEBUG
1745 printk("stl_flushbuffer(tty=%x)\n", (int) tty);
1746 #endif
1747
1748 if (tty == (struct tty_struct *) NULL)
1749 return;
1750 portp = tty->driver_data;
1751 if (portp == (stlport_t *) NULL)
1752 return;
1753
1754 stl_flush(portp);
1755 tty_wakeup(tty);
1756 }
1757
1758 /*****************************************************************************/
1759
1760 static void stl_breakctl(struct tty_struct *tty, int state)
1761 {
1762 stlport_t *portp;
1763
1764 #ifdef DEBUG
1765 printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state);
1766 #endif
1767
1768 if (tty == (struct tty_struct *) NULL)
1769 return;
1770 portp = tty->driver_data;
1771 if (portp == (stlport_t *) NULL)
1772 return;
1773
1774 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1775 }
1776
1777 /*****************************************************************************/
1778
1779 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
1780 {
1781 stlport_t *portp;
1782 unsigned long tend;
1783
1784 #ifdef DEBUG
1785 printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout);
1786 #endif
1787
1788 if (tty == (struct tty_struct *) NULL)
1789 return;
1790 portp = tty->driver_data;
1791 if (portp == (stlport_t *) NULL)
1792 return;
1793
1794 if (timeout == 0)
1795 timeout = HZ;
1796 tend = jiffies + timeout;
1797
1798 while (stl_datastate(portp)) {
1799 if (signal_pending(current))
1800 break;
1801 msleep_interruptible(20);
1802 if (time_after_eq(jiffies, tend))
1803 break;
1804 }
1805 }
1806
1807 /*****************************************************************************/
1808
1809 static void stl_sendxchar(struct tty_struct *tty, char ch)
1810 {
1811 stlport_t *portp;
1812
1813 #ifdef DEBUG
1814 printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch);
1815 #endif
1816
1817 if (tty == (struct tty_struct *) NULL)
1818 return;
1819 portp = tty->driver_data;
1820 if (portp == (stlport_t *) NULL)
1821 return;
1822
1823 if (ch == STOP_CHAR(tty))
1824 stl_sendflow(portp, 0);
1825 else if (ch == START_CHAR(tty))
1826 stl_sendflow(portp, 1);
1827 else
1828 stl_putchar(tty, ch);
1829 }
1830
1831 /*****************************************************************************/
1832
1833 #define MAXLINE 80
1834
1835 /*
1836 * Format info for a specified port. The line is deliberately limited
1837 * to 80 characters. (If it is too long it will be truncated, if too
1838 * short then padded with spaces).
1839 */
1840
1841 static int stl_portinfo(stlport_t *portp, int portnr, char *pos)
1842 {
1843 char *sp;
1844 int sigs, cnt;
1845
1846 sp = pos;
1847 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1848 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1849 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1850
1851 if (portp->stats.rxframing)
1852 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1853 if (portp->stats.rxparity)
1854 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1855 if (portp->stats.rxbreaks)
1856 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1857 if (portp->stats.rxoverrun)
1858 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1859
1860 sigs = stl_getsignals(portp);
1861 cnt = sprintf(sp, "%s%s%s%s%s ",
1862 (sigs & TIOCM_RTS) ? "|RTS" : "",
1863 (sigs & TIOCM_CTS) ? "|CTS" : "",
1864 (sigs & TIOCM_DTR) ? "|DTR" : "",
1865 (sigs & TIOCM_CD) ? "|DCD" : "",
1866 (sigs & TIOCM_DSR) ? "|DSR" : "");
1867 *sp = ' ';
1868 sp += cnt;
1869
1870 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
1871 *sp++ = ' ';
1872 if (cnt >= MAXLINE)
1873 pos[(MAXLINE - 2)] = '+';
1874 pos[(MAXLINE - 1)] = '\n';
1875
1876 return(MAXLINE);
1877 }
1878
1879 /*****************************************************************************/
1880
1881 /*
1882 * Port info, read from the /proc file system.
1883 */
1884
1885 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1886 {
1887 stlbrd_t *brdp;
1888 stlpanel_t *panelp;
1889 stlport_t *portp;
1890 int brdnr, panelnr, portnr, totalport;
1891 int curoff, maxoff;
1892 char *pos;
1893
1894 #ifdef DEBUG
1895 printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
1896 "data=%x\n", (int) page, (int) start, (int) off, count,
1897 (int) eof, (int) data);
1898 #endif
1899
1900 pos = page;
1901 totalport = 0;
1902 curoff = 0;
1903
1904 if (off == 0) {
1905 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1906 stl_drvversion);
1907 while (pos < (page + MAXLINE - 1))
1908 *pos++ = ' ';
1909 *pos++ = '\n';
1910 }
1911 curoff = MAXLINE;
1912
1913 /*
1914 * We scan through for each board, panel and port. The offset is
1915 * calculated on the fly, and irrelevant ports are skipped.
1916 */
1917 for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
1918 brdp = stl_brds[brdnr];
1919 if (brdp == (stlbrd_t *) NULL)
1920 continue;
1921 if (brdp->state == 0)
1922 continue;
1923
1924 maxoff = curoff + (brdp->nrports * MAXLINE);
1925 if (off >= maxoff) {
1926 curoff = maxoff;
1927 continue;
1928 }
1929
1930 totalport = brdnr * STL_MAXPORTS;
1931 for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
1932 panelp = brdp->panels[panelnr];
1933 if (panelp == (stlpanel_t *) NULL)
1934 continue;
1935
1936 maxoff = curoff + (panelp->nrports * MAXLINE);
1937 if (off >= maxoff) {
1938 curoff = maxoff;
1939 totalport += panelp->nrports;
1940 continue;
1941 }
1942
1943 for (portnr = 0; (portnr < panelp->nrports); portnr++,
1944 totalport++) {
1945 portp = panelp->ports[portnr];
1946 if (portp == (stlport_t *) NULL)
1947 continue;
1948 if (off >= (curoff += MAXLINE))
1949 continue;
1950 if ((pos - page + MAXLINE) > count)
1951 goto stl_readdone;
1952 pos += stl_portinfo(portp, totalport, pos);
1953 }
1954 }
1955 }
1956
1957 *eof = 1;
1958
1959 stl_readdone:
1960 *start = page;
1961 return(pos - page);
1962 }
1963
1964 /*****************************************************************************/
1965
1966 /*
1967 * All board interrupts are vectored through here first. This code then
1968 * calls off to the approrpriate board interrupt handlers.
1969 */
1970
1971 static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs)
1972 {
1973 stlbrd_t *brdp = (stlbrd_t *) dev_id;
1974
1975 #ifdef DEBUG
1976 printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq,
1977 (int) regs);
1978 #endif
1979
1980 return IRQ_RETVAL((* brdp->isr)(brdp));
1981 }
1982
1983 /*****************************************************************************/
1984
1985 /*
1986 * Interrupt service routine for EasyIO board types.
1987 */
1988
1989 static int stl_eiointr(stlbrd_t *brdp)
1990 {
1991 stlpanel_t *panelp;
1992 unsigned int iobase;
1993 int handled = 0;
1994
1995 panelp = brdp->panels[0];
1996 iobase = panelp->iobase;
1997 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1998 handled = 1;
1999 (* panelp->isr)(panelp, iobase);
2000 }
2001 return handled;
2002 }
2003
2004 /*****************************************************************************/
2005
2006 /*
2007 * Interrupt service routine for ECH-AT board types.
2008 */
2009
2010 static int stl_echatintr(stlbrd_t *brdp)
2011 {
2012 stlpanel_t *panelp;
2013 unsigned int ioaddr;
2014 int bnknr;
2015 int handled = 0;
2016
2017 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2018
2019 while (inb(brdp->iostatus) & ECH_INTRPEND) {
2020 handled = 1;
2021 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2022 ioaddr = brdp->bnkstataddr[bnknr];
2023 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2024 panelp = brdp->bnk2panel[bnknr];
2025 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2026 }
2027 }
2028 }
2029
2030 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2031
2032 return handled;
2033 }
2034
2035 /*****************************************************************************/
2036
2037 /*
2038 * Interrupt service routine for ECH-MCA board types.
2039 */
2040
2041 static int stl_echmcaintr(stlbrd_t *brdp)
2042 {
2043 stlpanel_t *panelp;
2044 unsigned int ioaddr;
2045 int bnknr;
2046 int handled = 0;
2047
2048 while (inb(brdp->iostatus) & ECH_INTRPEND) {
2049 handled = 1;
2050 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2051 ioaddr = brdp->bnkstataddr[bnknr];
2052 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2053 panelp = brdp->bnk2panel[bnknr];
2054 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2055 }
2056 }
2057 }
2058 return handled;
2059 }
2060
2061 /*****************************************************************************/
2062
2063 /*
2064 * Interrupt service routine for ECH-PCI board types.
2065 */
2066
2067 static int stl_echpciintr(stlbrd_t *brdp)
2068 {
2069 stlpanel_t *panelp;
2070 unsigned int ioaddr;
2071 int bnknr, recheck;
2072 int handled = 0;
2073
2074 while (1) {
2075 recheck = 0;
2076 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2077 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
2078 ioaddr = brdp->bnkstataddr[bnknr];
2079 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2080 panelp = brdp->bnk2panel[bnknr];
2081 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2082 recheck++;
2083 handled = 1;
2084 }
2085 }
2086 if (! recheck)
2087 break;
2088 }
2089 return handled;
2090 }
2091
2092 /*****************************************************************************/
2093
2094 /*
2095 * Interrupt service routine for ECH-8/64-PCI board types.
2096 */
2097
2098 static int stl_echpci64intr(stlbrd_t *brdp)
2099 {
2100 stlpanel_t *panelp;
2101 unsigned int ioaddr;
2102 int bnknr;
2103 int handled = 0;
2104
2105 while (inb(brdp->ioctrl) & 0x1) {
2106 handled = 1;
2107 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2108 ioaddr = brdp->bnkstataddr[bnknr];
2109 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2110 panelp = brdp->bnk2panel[bnknr];
2111 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2112 }
2113 }
2114 }
2115
2116 return handled;
2117 }
2118
2119 /*****************************************************************************/
2120
2121 /*
2122 * Service an off-level request for some channel.
2123 */
2124 static void stl_offintr(void *private)
2125 {
2126 stlport_t *portp;
2127 struct tty_struct *tty;
2128 unsigned int oldsigs;
2129
2130 portp = private;
2131
2132 #ifdef DEBUG
2133 printk("stl_offintr(portp=%x)\n", (int) portp);
2134 #endif
2135
2136 if (portp == (stlport_t *) NULL)
2137 return;
2138
2139 tty = portp->tty;
2140 if (tty == (struct tty_struct *) NULL)
2141 return;
2142
2143 lock_kernel();
2144 if (test_bit(ASYI_TXLOW, &portp->istate)) {
2145 tty_wakeup(tty);
2146 }
2147 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
2148 clear_bit(ASYI_DCDCHANGE, &portp->istate);
2149 oldsigs = portp->sigs;
2150 portp->sigs = stl_getsignals(portp);
2151 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
2152 wake_up_interruptible(&portp->open_wait);
2153 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
2154 if (portp->flags & ASYNC_CHECK_CD)
2155 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
2156 }
2157 }
2158 unlock_kernel();
2159 }
2160
2161 /*****************************************************************************/
2162
2163 /*
2164 * Initialize all the ports on a panel.
2165 */
2166
2167 static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp)
2168 {
2169 stlport_t *portp;
2170 int chipmask, i;
2171
2172 #ifdef DEBUG
2173 printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
2174 #endif
2175
2176 chipmask = stl_panelinit(brdp, panelp);
2177
2178 /*
2179 * All UART's are initialized (if found!). Now go through and setup
2180 * each ports data structures.
2181 */
2182 for (i = 0; (i < panelp->nrports); i++) {
2183 portp = (stlport_t *) stl_memalloc(sizeof(stlport_t));
2184 if (portp == (stlport_t *) NULL) {
2185 printk("STALLION: failed to allocate memory "
2186 "(size=%d)\n", sizeof(stlport_t));
2187 break;
2188 }
2189 memset(portp, 0, sizeof(stlport_t));
2190
2191 portp->magic = STL_PORTMAGIC;
2192 portp->portnr = i;
2193 portp->brdnr = panelp->brdnr;
2194 portp->panelnr = panelp->panelnr;
2195 portp->uartp = panelp->uartp;
2196 portp->clk = brdp->clk;
2197 portp->baud_base = STL_BAUDBASE;
2198 portp->close_delay = STL_CLOSEDELAY;
2199 portp->closing_wait = 30 * HZ;
2200 INIT_WORK(&portp->tqueue, stl_offintr, portp);
2201 init_waitqueue_head(&portp->open_wait);
2202 init_waitqueue_head(&portp->close_wait);
2203 portp->stats.brd = portp->brdnr;
2204 portp->stats.panel = portp->panelnr;
2205 portp->stats.port = portp->portnr;
2206 panelp->ports[i] = portp;
2207 stl_portinit(brdp, panelp, portp);
2208 }
2209
2210 return(0);
2211 }
2212
2213 /*****************************************************************************/
2214
2215 /*
2216 * Try to find and initialize an EasyIO board.
2217 */
2218
2219 static inline int stl_initeio(stlbrd_t *brdp)
2220 {
2221 stlpanel_t *panelp;
2222 unsigned int status;
2223 char *name;
2224 int rc;
2225
2226 #ifdef DEBUG
2227 printk("stl_initeio(brdp=%x)\n", (int) brdp);
2228 #endif
2229
2230 brdp->ioctrl = brdp->ioaddr1 + 1;
2231 brdp->iostatus = brdp->ioaddr1 + 2;
2232
2233 status = inb(brdp->iostatus);
2234 if ((status & EIO_IDBITMASK) == EIO_MK3)
2235 brdp->ioctrl++;
2236
2237 /*
2238 * Handle board specific stuff now. The real difference is PCI
2239 * or not PCI.
2240 */
2241 if (brdp->brdtype == BRD_EASYIOPCI) {
2242 brdp->iosize1 = 0x80;
2243 brdp->iosize2 = 0x80;
2244 name = "serial(EIO-PCI)";
2245 outb(0x41, (brdp->ioaddr2 + 0x4c));
2246 } else {
2247 brdp->iosize1 = 8;
2248 name = "serial(EIO)";
2249 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2250 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2251 printk("STALLION: invalid irq=%d for brd=%d\n",
2252 brdp->irq, brdp->brdnr);
2253 return(-EINVAL);
2254 }
2255 outb((stl_vecmap[brdp->irq] | EIO_0WS |
2256 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
2257 brdp->ioctrl);
2258 }
2259
2260 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2261 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2262 "%x conflicts with another device\n", brdp->brdnr,
2263 brdp->ioaddr1);
2264 return(-EBUSY);
2265 }
2266
2267 if (brdp->iosize2 > 0)
2268 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2269 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2270 "address %x conflicts with another device\n",
2271 brdp->brdnr, brdp->ioaddr2);
2272 printk(KERN_WARNING "STALLION: Warning, also "
2273 "releasing board %d I/O address %x \n",
2274 brdp->brdnr, brdp->ioaddr1);
2275 release_region(brdp->ioaddr1, brdp->iosize1);
2276 return(-EBUSY);
2277 }
2278
2279 /*
2280 * Everything looks OK, so let's go ahead and probe for the hardware.
2281 */
2282 brdp->clk = CD1400_CLK;
2283 brdp->isr = stl_eiointr;
2284
2285 switch (status & EIO_IDBITMASK) {
2286 case EIO_8PORTM:
2287 brdp->clk = CD1400_CLK8M;
2288 /* fall thru */
2289 case EIO_8PORTRS:
2290 case EIO_8PORTDI:
2291 brdp->nrports = 8;
2292 break;
2293 case EIO_4PORTRS:
2294 brdp->nrports = 4;
2295 break;
2296 case EIO_MK3:
2297 switch (status & EIO_BRDMASK) {
2298 case ID_BRD4:
2299 brdp->nrports = 4;
2300 break;
2301 case ID_BRD8:
2302 brdp->nrports = 8;
2303 break;
2304 case ID_BRD16:
2305 brdp->nrports = 16;
2306 break;
2307 default:
2308 return(-ENODEV);
2309 }
2310 break;
2311 default:
2312 return(-ENODEV);
2313 }
2314
2315 /*
2316 * We have verified that the board is actually present, so now we
2317 * can complete the setup.
2318 */
2319
2320 panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
2321 if (panelp == (stlpanel_t *) NULL) {
2322 printk(KERN_WARNING "STALLION: failed to allocate memory "
2323 "(size=%d)\n", sizeof(stlpanel_t));
2324 return(-ENOMEM);
2325 }
2326 memset(panelp, 0, sizeof(stlpanel_t));
2327
2328 panelp->magic = STL_PANELMAGIC;
2329 panelp->brdnr = brdp->brdnr;
2330 panelp->panelnr = 0;
2331 panelp->nrports = brdp->nrports;
2332 panelp->iobase = brdp->ioaddr1;
2333 panelp->hwid = status;
2334 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2335 panelp->uartp = (void *) &stl_sc26198uart;
2336 panelp->isr = stl_sc26198intr;
2337 } else {
2338 panelp->uartp = (void *) &stl_cd1400uart;
2339 panelp->isr = stl_cd1400eiointr;
2340 }
2341
2342 brdp->panels[0] = panelp;
2343 brdp->nrpanels = 1;
2344 brdp->state |= BRD_FOUND;
2345 brdp->hwid = status;
2346 if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
2347 printk("STALLION: failed to register interrupt "
2348 "routine for %s irq=%d\n", name, brdp->irq);
2349 rc = -ENODEV;
2350 } else {
2351 rc = 0;
2352 }
2353 return(rc);
2354 }
2355
2356 /*****************************************************************************/
2357
2358 /*
2359 * Try to find an ECH board and initialize it. This code is capable of
2360 * dealing with all types of ECH board.
2361 */
2362
2363 static inline int stl_initech(stlbrd_t *brdp)
2364 {
2365 stlpanel_t *panelp;
2366 unsigned int status, nxtid, ioaddr, conflict;
2367 int panelnr, banknr, i;
2368 char *name;
2369
2370 #ifdef DEBUG
2371 printk("stl_initech(brdp=%x)\n", (int) brdp);
2372 #endif
2373
2374 status = 0;
2375 conflict = 0;
2376
2377 /*
2378 * Set up the initial board register contents for boards. This varies a
2379 * bit between the different board types. So we need to handle each
2380 * separately. Also do a check that the supplied IRQ is good.
2381 */
2382 switch (brdp->brdtype) {
2383
2384 case BRD_ECH:
2385 brdp->isr = stl_echatintr;
2386 brdp->ioctrl = brdp->ioaddr1 + 1;
2387 brdp->iostatus = brdp->ioaddr1 + 1;
2388 status = inb(brdp->iostatus);
2389 if ((status & ECH_IDBITMASK) != ECH_ID)
2390 return(-ENODEV);
2391 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2392 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2393 printk("STALLION: invalid irq=%d for brd=%d\n",
2394 brdp->irq, brdp->brdnr);
2395 return(-EINVAL);
2396 }
2397 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2398 status |= (stl_vecmap[brdp->irq] << 1);
2399 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2400 brdp->ioctrlval = ECH_INTENABLE |
2401 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2402 for (i = 0; (i < 10); i++)
2403 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2404 brdp->iosize1 = 2;
2405 brdp->iosize2 = 32;
2406 name = "serial(EC8/32)";
2407 outb(status, brdp->ioaddr1);
2408 break;
2409
2410 case BRD_ECHMC:
2411 brdp->isr = stl_echmcaintr;
2412 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2413 brdp->iostatus = brdp->ioctrl;
2414 status = inb(brdp->iostatus);
2415 if ((status & ECH_IDBITMASK) != ECH_ID)
2416 return(-ENODEV);
2417 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2418 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2419 printk("STALLION: invalid irq=%d for brd=%d\n",
2420 brdp->irq, brdp->brdnr);
2421 return(-EINVAL);
2422 }
2423 outb(ECHMC_BRDRESET, brdp->ioctrl);
2424 outb(ECHMC_INTENABLE, brdp->ioctrl);
2425 brdp->iosize1 = 64;
2426 name = "serial(EC8/32-MC)";
2427 break;
2428
2429 case BRD_ECHPCI:
2430 brdp->isr = stl_echpciintr;
2431 brdp->ioctrl = brdp->ioaddr1 + 2;
2432 brdp->iosize1 = 4;
2433 brdp->iosize2 = 8;
2434 name = "serial(EC8/32-PCI)";
2435 break;
2436
2437 case BRD_ECH64PCI:
2438 brdp->isr = stl_echpci64intr;
2439 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2440 outb(0x43, (brdp->ioaddr1 + 0x4c));
2441 brdp->iosize1 = 0x80;
2442 brdp->iosize2 = 0x80;
2443 name = "serial(EC8/64-PCI)";
2444 break;
2445
2446 default:
2447 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2448 return(-EINVAL);
2449 break;
2450 }
2451
2452 /*
2453 * Check boards for possible IO address conflicts and return fail status
2454 * if an IO conflict found.
2455 */
2456 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2457 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2458 "%x conflicts with another device\n", brdp->brdnr,
2459 brdp->ioaddr1);
2460 return(-EBUSY);
2461 }
2462
2463 if (brdp->iosize2 > 0)
2464 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2465 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2466 "address %x conflicts with another device\n",
2467 brdp->brdnr, brdp->ioaddr2);
2468 printk(KERN_WARNING "STALLION: Warning, also "
2469 "releasing board %d I/O address %x \n",
2470 brdp->brdnr, brdp->ioaddr1);
2471 release_region(brdp->ioaddr1, brdp->iosize1);
2472 return(-EBUSY);
2473 }
2474
2475 /*
2476 * Scan through the secondary io address space looking for panels.
2477 * As we find'em allocate and initialize panel structures for each.
2478 */
2479 brdp->clk = CD1400_CLK;
2480 brdp->hwid = status;
2481
2482 ioaddr = brdp->ioaddr2;
2483 banknr = 0;
2484 panelnr = 0;
2485 nxtid = 0;
2486
2487 for (i = 0; (i < STL_MAXPANELS); i++) {
2488 if (brdp->brdtype == BRD_ECHPCI) {
2489 outb(nxtid, brdp->ioctrl);
2490 ioaddr = brdp->ioaddr2;
2491 }
2492 status = inb(ioaddr + ECH_PNLSTATUS);
2493 if ((status & ECH_PNLIDMASK) != nxtid)
2494 break;
2495 panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
2496 if (panelp == (stlpanel_t *) NULL) {
2497 printk("STALLION: failed to allocate memory "
2498 "(size=%d)\n", sizeof(stlpanel_t));
2499 break;
2500 }
2501 memset(panelp, 0, sizeof(stlpanel_t));
2502 panelp->magic = STL_PANELMAGIC;
2503 panelp->brdnr = brdp->brdnr;
2504 panelp->panelnr = panelnr;
2505 panelp->iobase = ioaddr;
2506 panelp->pagenr = nxtid;
2507 panelp->hwid = status;
2508 brdp->bnk2panel[banknr] = panelp;
2509 brdp->bnkpageaddr[banknr] = nxtid;
2510 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2511
2512 if (status & ECH_PNLXPID) {
2513 panelp->uartp = (void *) &stl_sc26198uart;
2514 panelp->isr = stl_sc26198intr;
2515 if (status & ECH_PNL16PORT) {
2516 panelp->nrports = 16;
2517 brdp->bnk2panel[banknr] = panelp;
2518 brdp->bnkpageaddr[banknr] = nxtid;
2519 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2520 ECH_PNLSTATUS;
2521 } else {
2522 panelp->nrports = 8;
2523 }
2524 } else {
2525 panelp->uartp = (void *) &stl_cd1400uart;
2526 panelp->isr = stl_cd1400echintr;
2527 if (status & ECH_PNL16PORT) {
2528 panelp->nrports = 16;
2529 panelp->ackmask = 0x80;
2530 if (brdp->brdtype != BRD_ECHPCI)
2531 ioaddr += EREG_BANKSIZE;
2532 brdp->bnk2panel[banknr] = panelp;
2533 brdp->bnkpageaddr[banknr] = ++nxtid;
2534 brdp->bnkstataddr[banknr++] = ioaddr +
2535 ECH_PNLSTATUS;
2536 } else {
2537 panelp->nrports = 8;
2538 panelp->ackmask = 0xc0;
2539 }
2540 }
2541
2542 nxtid++;
2543 ioaddr += EREG_BANKSIZE;
2544 brdp->nrports += panelp->nrports;
2545 brdp->panels[panelnr++] = panelp;
2546 if ((brdp->brdtype != BRD_ECHPCI) &&
2547 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2548 break;
2549 }
2550
2551 brdp->nrpanels = panelnr;
2552 brdp->nrbnks = banknr;
2553 if (brdp->brdtype == BRD_ECH)
2554 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2555
2556 brdp->state |= BRD_FOUND;
2557 if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
2558 printk("STALLION: failed to register interrupt "
2559 "routine for %s irq=%d\n", name, brdp->irq);
2560 i = -ENODEV;
2561 } else {
2562 i = 0;
2563 }
2564
2565 return(i);
2566 }
2567
2568 /*****************************************************************************/
2569
2570 /*
2571 * Initialize and configure the specified board.
2572 * Scan through all the boards in the configuration and see what we
2573 * can find. Handle EIO and the ECH boards a little differently here
2574 * since the initial search and setup is very different.
2575 */
2576
2577 static int __init stl_brdinit(stlbrd_t *brdp)
2578 {
2579 int i;
2580
2581 #ifdef DEBUG
2582 printk("stl_brdinit(brdp=%x)\n", (int) brdp);
2583 #endif
2584
2585 switch (brdp->brdtype) {
2586 case BRD_EASYIO:
2587 case BRD_EASYIOPCI:
2588 stl_initeio(brdp);
2589 break;
2590 case BRD_ECH:
2591 case BRD_ECHMC:
2592 case BRD_ECHPCI:
2593 case BRD_ECH64PCI:
2594 stl_initech(brdp);
2595 break;
2596 default:
2597 printk("STALLION: board=%d is unknown board type=%d\n",
2598 brdp->brdnr, brdp->brdtype);
2599 return(ENODEV);
2600 }
2601
2602 stl_brds[brdp->brdnr] = brdp;
2603 if ((brdp->state & BRD_FOUND) == 0) {
2604 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2605 stl_brdnames[brdp->brdtype], brdp->brdnr,
2606 brdp->ioaddr1, brdp->irq);
2607 return(ENODEV);
2608 }
2609
2610 for (i = 0; (i < STL_MAXPANELS); i++)
2611 if (brdp->panels[i] != (stlpanel_t *) NULL)
2612 stl_initports(brdp, brdp->panels[i]);
2613
2614 printk("STALLION: %s found, board=%d io=%x irq=%d "
2615 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2616 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2617 brdp->nrports);
2618 return(0);
2619 }
2620
2621 /*****************************************************************************/
2622
2623 /*
2624 * Find the next available board number that is free.
2625 */
2626
2627 static inline int stl_getbrdnr(void)
2628 {
2629 int i;
2630
2631 for (i = 0; (i < STL_MAXBRDS); i++) {
2632 if (stl_brds[i] == (stlbrd_t *) NULL) {
2633 if (i >= stl_nrbrds)
2634 stl_nrbrds = i + 1;
2635 return(i);
2636 }
2637 }
2638 return(-1);
2639 }
2640
2641 /*****************************************************************************/
2642
2643 #ifdef CONFIG_PCI
2644
2645 /*
2646 * We have a Stallion board. Allocate a board structure and
2647 * initialize it. Read its IO and IRQ resources from PCI
2648 * configuration space.
2649 */
2650
2651 static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp)
2652 {
2653 stlbrd_t *brdp;
2654
2655 #ifdef DEBUG
2656 printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype,
2657 devp->bus->number, devp->devfn);
2658 #endif
2659
2660 if (pci_enable_device(devp))
2661 return(-EIO);
2662 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
2663 return(-ENOMEM);
2664 if ((brdp->brdnr = stl_getbrdnr()) < 0) {
2665 printk("STALLION: too many boards found, "
2666 "maximum supported %d\n", STL_MAXBRDS);
2667 return(0);
2668 }
2669 brdp->brdtype = brdtype;
2670
2671 /*
2672 * Different Stallion boards use the BAR registers in different ways,
2673 * so set up io addresses based on board type.
2674 */
2675 #ifdef DEBUG
2676 printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__,
2677 pci_resource_start(devp, 0), pci_resource_start(devp, 1),
2678 pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq);
2679 #endif
2680
2681 /*
2682 * We have all resources from the board, so let's setup the actual
2683 * board structure now.
2684 */
2685 switch (brdtype) {
2686 case BRD_ECHPCI:
2687 brdp->ioaddr2 = pci_resource_start(devp, 0);
2688 brdp->ioaddr1 = pci_resource_start(devp, 1);
2689 break;
2690 case BRD_ECH64PCI:
2691 brdp->ioaddr2 = pci_resource_start(devp, 2);
2692 brdp->ioaddr1 = pci_resource_start(devp, 1);
2693 break;
2694 case BRD_EASYIOPCI:
2695 brdp->ioaddr1 = pci_resource_start(devp, 2);
2696 brdp->ioaddr2 = pci_resource_start(devp, 1);
2697 break;
2698 default:
2699 printk("STALLION: unknown PCI board type=%d\n", brdtype);
2700 break;
2701 }
2702
2703 brdp->irq = devp->irq;
2704 stl_brdinit(brdp);
2705
2706 return(0);
2707 }
2708
2709 /*****************************************************************************/
2710
2711 /*
2712 * Find all Stallion PCI boards that might be installed. Initialize each
2713 * one as it is found.
2714 */
2715
2716
2717 static inline int stl_findpcibrds(void)
2718 {
2719 struct pci_dev *dev = NULL;
2720 int i, rc;
2721
2722 #ifdef DEBUG
2723 printk("stl_findpcibrds()\n");
2724 #endif
2725
2726 for (i = 0; (i < stl_nrpcibrds); i++)
2727 while ((dev = pci_find_device(stl_pcibrds[i].vendid,
2728 stl_pcibrds[i].devid, dev))) {
2729
2730 /*
2731 * Found a device on the PCI bus that has our vendor and
2732 * device ID. Need to check now that it is really us.
2733 */
2734 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2735 continue;
2736
2737 rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev);
2738 if (rc)
2739 return(rc);
2740 }
2741
2742 return(0);
2743 }
2744
2745 #endif
2746
2747 /*****************************************************************************/
2748
2749 /*
2750 * Scan through all the boards in the configuration and see what we
2751 * can find. Handle EIO and the ECH boards a little differently here
2752 * since the initial search and setup is too different.
2753 */
2754
2755 static inline int stl_initbrds(void)
2756 {
2757 stlbrd_t *brdp;
2758 stlconf_t *confp;
2759 int i;
2760
2761 #ifdef DEBUG
2762 printk("stl_initbrds()\n");
2763 #endif
2764
2765 if (stl_nrbrds > STL_MAXBRDS) {
2766 printk("STALLION: too many boards in configuration table, "
2767 "truncating to %d\n", STL_MAXBRDS);
2768 stl_nrbrds = STL_MAXBRDS;
2769 }
2770
2771 /*
2772 * Firstly scan the list of static boards configured. Allocate
2773 * resources and initialize the boards as found.
2774 */
2775 for (i = 0; (i < stl_nrbrds); i++) {
2776 confp = &stl_brdconf[i];
2777 stl_parsebrd(confp, stl_brdsp[i]);
2778 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
2779 return(-ENOMEM);
2780 brdp->brdnr = i;
2781 brdp->brdtype = confp->brdtype;
2782 brdp->ioaddr1 = confp->ioaddr1;
2783 brdp->ioaddr2 = confp->ioaddr2;
2784 brdp->irq = confp->irq;
2785 brdp->irqtype = confp->irqtype;
2786 stl_brdinit(brdp);
2787 }
2788
2789 /*
2790 * Find any dynamically supported boards. That is via module load
2791 * line options or auto-detected on the PCI bus.
2792 */
2793 stl_argbrds();
2794 #ifdef CONFIG_PCI
2795 stl_findpcibrds();
2796 #endif
2797
2798 return(0);
2799 }
2800
2801 /*****************************************************************************/
2802
2803 /*
2804 * Return the board stats structure to user app.
2805 */
2806
2807 static int stl_getbrdstats(combrd_t __user *bp)
2808 {
2809 stlbrd_t *brdp;
2810 stlpanel_t *panelp;
2811 int i;
2812
2813 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2814 return -EFAULT;
2815 if (stl_brdstats.brd >= STL_MAXBRDS)
2816 return(-ENODEV);
2817 brdp = stl_brds[stl_brdstats.brd];
2818 if (brdp == (stlbrd_t *) NULL)
2819 return(-ENODEV);
2820
2821 memset(&stl_brdstats, 0, sizeof(combrd_t));
2822 stl_brdstats.brd = brdp->brdnr;
2823 stl_brdstats.type = brdp->brdtype;
2824 stl_brdstats.hwid = brdp->hwid;
2825 stl_brdstats.state = brdp->state;
2826 stl_brdstats.ioaddr = brdp->ioaddr1;
2827 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2828 stl_brdstats.irq = brdp->irq;
2829 stl_brdstats.nrpanels = brdp->nrpanels;
2830 stl_brdstats.nrports = brdp->nrports;
2831 for (i = 0; (i < brdp->nrpanels); i++) {
2832 panelp = brdp->panels[i];
2833 stl_brdstats.panels[i].panel = i;
2834 stl_brdstats.panels[i].hwid = panelp->hwid;
2835 stl_brdstats.panels[i].nrports = panelp->nrports;
2836 }
2837
2838 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2839 }
2840
2841 /*****************************************************************************/
2842
2843 /*
2844 * Resolve the referenced port number into a port struct pointer.
2845 */
2846
2847 static stlport_t *stl_getport(int brdnr, int panelnr, int portnr)
2848 {
2849 stlbrd_t *brdp;
2850 stlpanel_t *panelp;
2851
2852 if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
2853 return((stlport_t *) NULL);
2854 brdp = stl_brds[brdnr];
2855 if (brdp == (stlbrd_t *) NULL)
2856 return((stlport_t *) NULL);
2857 if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
2858 return((stlport_t *) NULL);
2859 panelp = brdp->panels[panelnr];
2860 if (panelp == (stlpanel_t *) NULL)
2861 return((stlport_t *) NULL);
2862 if ((portnr < 0) || (portnr >= panelp->nrports))
2863 return((stlport_t *) NULL);
2864 return(panelp->ports[portnr]);
2865 }
2866
2867 /*****************************************************************************/
2868
2869 /*
2870 * Return the port stats structure to user app. A NULL port struct
2871 * pointer passed in means that we need to find out from the app
2872 * what port to get stats for (used through board control device).
2873 */
2874
2875 static int stl_getportstats(stlport_t *portp, comstats_t __user *cp)
2876 {
2877 unsigned char *head, *tail;
2878 unsigned long flags;
2879
2880 if (!portp) {
2881 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2882 return -EFAULT;
2883 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2884 stl_comstats.port);
2885 if (portp == (stlport_t *) NULL)
2886 return(-ENODEV);
2887 }
2888
2889 portp->stats.state = portp->istate;
2890 portp->stats.flags = portp->flags;
2891 portp->stats.hwid = portp->hwid;
2892
2893 portp->stats.ttystate = 0;
2894 portp->stats.cflags = 0;
2895 portp->stats.iflags = 0;
2896 portp->stats.oflags = 0;
2897 portp->stats.lflags = 0;
2898 portp->stats.rxbuffered = 0;
2899
2900 save_flags(flags);
2901 cli();
2902 if (portp->tty != (struct tty_struct *) NULL) {
2903 if (portp->tty->driver_data == portp) {
2904 portp->stats.ttystate = portp->tty->flags;
2905 portp->stats.rxbuffered = portp->tty->flip.count;
2906 if (portp->tty->termios != (struct termios *) NULL) {
2907 portp->stats.cflags = portp->tty->termios->c_cflag;
2908 portp->stats.iflags = portp->tty->termios->c_iflag;
2909 portp->stats.oflags = portp->tty->termios->c_oflag;
2910 portp->stats.lflags = portp->tty->termios->c_lflag;
2911 }
2912 }
2913 }
2914 restore_flags(flags);
2915
2916 head = portp->tx.head;
2917 tail = portp->tx.tail;
2918 portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
2919 (STL_TXBUFSIZE - (tail - head)));
2920
2921 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2922
2923 return copy_to_user(cp, &portp->stats,
2924 sizeof(comstats_t)) ? -EFAULT : 0;
2925 }
2926
2927 /*****************************************************************************/
2928
2929 /*
2930 * Clear the port stats structure. We also return it zeroed out...
2931 */
2932
2933 static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp)
2934 {
2935 if (!portp) {
2936 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2937 return -EFAULT;
2938 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2939 stl_comstats.port);
2940 if (portp == (stlport_t *) NULL)
2941 return(-ENODEV);
2942 }
2943
2944 memset(&portp->stats, 0, sizeof(comstats_t));
2945 portp->stats.brd = portp->brdnr;
2946 portp->stats.panel = portp->panelnr;
2947 portp->stats.port = portp->portnr;
2948 return copy_to_user(cp, &portp->stats,
2949 sizeof(comstats_t)) ? -EFAULT : 0;
2950 }
2951
2952 /*****************************************************************************/
2953
2954 /*
2955 * Return the entire driver ports structure to a user app.
2956 */
2957
2958 static int stl_getportstruct(stlport_t __user *arg)
2959 {
2960 stlport_t *portp;
2961
2962 if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t)))
2963 return -EFAULT;
2964 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2965 stl_dummyport.portnr);
2966 if (!portp)
2967 return -ENODEV;
2968 return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0;
2969 }
2970
2971 /*****************************************************************************/
2972
2973 /*
2974 * Return the entire driver board structure to a user app.
2975 */
2976
2977 static int stl_getbrdstruct(stlbrd_t __user *arg)
2978 {
2979 stlbrd_t *brdp;
2980
2981 if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t)))
2982 return -EFAULT;
2983 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2984 return -ENODEV;
2985 brdp = stl_brds[stl_dummybrd.brdnr];
2986 if (!brdp)
2987 return(-ENODEV);
2988 return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0;
2989 }
2990
2991 /*****************************************************************************/
2992
2993 /*
2994 * The "staliomem" device is also required to do some special operations
2995 * on the board and/or ports. In this driver it is mostly used for stats
2996 * collection.
2997 */
2998
2999 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
3000 {
3001 int brdnr, rc;
3002 void __user *argp = (void __user *)arg;
3003
3004 #ifdef DEBUG
3005 printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip,
3006 (int) fp, cmd, (int) arg);
3007 #endif
3008
3009 brdnr = iminor(ip);
3010 if (brdnr >= STL_MAXBRDS)
3011 return(-ENODEV);
3012 rc = 0;
3013
3014 switch (cmd) {
3015 case COM_GETPORTSTATS:
3016 rc = stl_getportstats(NULL, argp);
3017 break;
3018 case COM_CLRPORTSTATS:
3019 rc = stl_clrportstats(NULL, argp);
3020 break;
3021 case COM_GETBRDSTATS:
3022 rc = stl_getbrdstats(argp);
3023 break;
3024 case COM_READPORT:
3025 rc = stl_getportstruct(argp);
3026 break;
3027 case COM_READBOARD:
3028 rc = stl_getbrdstruct(argp);
3029 break;
3030 default:
3031 rc = -ENOIOCTLCMD;
3032 break;
3033 }
3034
3035 return(rc);
3036 }
3037
3038 static struct tty_operations stl_ops = {
3039 .open = stl_open,
3040 .close = stl_close,
3041 .write = stl_write,
3042 .put_char = stl_putchar,
3043 .flush_chars = stl_flushchars,
3044 .write_room = stl_writeroom,
3045 .chars_in_buffer = stl_charsinbuffer,
3046 .ioctl = stl_ioctl,
3047 .set_termios = stl_settermios,
3048 .throttle = stl_throttle,
3049 .unthrottle = stl_unthrottle,
3050 .stop = stl_stop,
3051 .start = stl_start,
3052 .hangup = stl_hangup,
3053 .flush_buffer = stl_flushbuffer,
3054 .break_ctl = stl_breakctl,
3055 .wait_until_sent = stl_waituntilsent,
3056 .send_xchar = stl_sendxchar,
3057 .read_proc = stl_readproc,
3058 .tiocmget = stl_tiocmget,
3059 .tiocmset = stl_tiocmset,
3060 };
3061
3062 /*****************************************************************************/
3063
3064 static int __init stl_init(void)
3065 {
3066 int i;
3067 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
3068
3069 stl_initbrds();
3070
3071 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
3072 if (!stl_serial)
3073 return -1;
3074
3075 /*
3076 * Allocate a temporary write buffer.
3077 */
3078 stl_tmpwritebuf = (char *) stl_memalloc(STL_TXBUFSIZE);
3079 if (stl_tmpwritebuf == (char *) NULL)
3080 printk("STALLION: failed to allocate memory (size=%d)\n",
3081 STL_TXBUFSIZE);
3082
3083 /*
3084 * Set up a character driver for per board stuff. This is mainly used
3085 * to do stats ioctls on the ports.
3086 */
3087 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
3088 printk("STALLION: failed to register serial board device\n");
3089 devfs_mk_dir("staliomem");
3090
3091 stallion_class = class_create(THIS_MODULE, "staliomem");
3092 for (i = 0; i < 4; i++) {
3093 devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i),
3094 S_IFCHR|S_IRUSR|S_IWUSR,
3095 "staliomem/%d", i);
3096 class_device_create(stallion_class, NULL,
3097 MKDEV(STL_SIOMEMMAJOR, i), NULL,
3098 "staliomem%d", i);
3099 }
3100
3101 stl_serial->owner = THIS_MODULE;
3102 stl_serial->driver_name = stl_drvname;
3103 stl_serial->name = "ttyE";
3104 stl_serial->devfs_name = "tts/E";
3105 stl_serial->major = STL_SERIALMAJOR;
3106 stl_serial->minor_start = 0;
3107 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
3108 stl_serial->subtype = SERIAL_TYPE_NORMAL;
3109 stl_serial->init_termios = stl_deftermios;
3110 stl_serial->flags = TTY_DRIVER_REAL_RAW;
3111 tty_set_operations(stl_serial, &stl_ops);
3112
3113 if (tty_register_driver(stl_serial)) {
3114 put_tty_driver(stl_serial);
3115 printk("STALLION: failed to register serial driver\n");
3116 return -1;
3117 }
3118
3119 return(0);
3120 }
3121
3122 /*****************************************************************************/
3123 /* CD1400 HARDWARE FUNCTIONS */
3124 /*****************************************************************************/
3125
3126 /*
3127 * These functions get/set/update the registers of the cd1400 UARTs.
3128 * Access to the cd1400 registers is via an address/data io port pair.
3129 * (Maybe should make this inline...)
3130 */
3131
3132 static int stl_cd1400getreg(stlport_t *portp, int regnr)
3133 {
3134 outb((regnr + portp->uartaddr), portp->ioaddr);
3135 return(inb(portp->ioaddr + EREG_DATA));
3136 }
3137
3138 static void stl_cd1400setreg(stlport_t *portp, int regnr, int value)
3139 {
3140 outb((regnr + portp->uartaddr), portp->ioaddr);
3141 outb(value, portp->ioaddr + EREG_DATA);
3142 }
3143
3144 static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value)
3145 {
3146 outb((regnr + portp->uartaddr), portp->ioaddr);
3147 if (inb(portp->ioaddr + EREG_DATA) != value) {
3148 outb(value, portp->ioaddr + EREG_DATA);
3149 return(1);
3150 }
3151 return(0);
3152 }
3153
3154 /*****************************************************************************/
3155
3156 /*
3157 * Inbitialize the UARTs in a panel. We don't care what sort of board
3158 * these ports are on - since the port io registers are almost
3159 * identical when dealing with ports.
3160 */
3161
3162 static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
3163 {
3164 unsigned int gfrcr;
3165 int chipmask, i, j;
3166 int nrchips, uartaddr, ioaddr;
3167
3168 #ifdef DEBUG
3169 printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
3170 #endif
3171
3172 BRDENABLE(panelp->brdnr, panelp->pagenr);
3173
3174 /*
3175 * Check that each chip is present and started up OK.
3176 */
3177 chipmask = 0;
3178 nrchips = panelp->nrports / CD1400_PORTS;
3179 for (i = 0; (i < nrchips); i++) {
3180 if (brdp->brdtype == BRD_ECHPCI) {
3181 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
3182 ioaddr = panelp->iobase;
3183 } else {
3184 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
3185 }
3186 uartaddr = (i & 0x01) ? 0x080 : 0;
3187 outb((GFRCR + uartaddr), ioaddr);
3188 outb(0, (ioaddr + EREG_DATA));
3189 outb((CCR + uartaddr), ioaddr);
3190 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
3191 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
3192 outb((GFRCR + uartaddr), ioaddr);
3193 for (j = 0; (j < CCR_MAXWAIT); j++) {
3194 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
3195 break;
3196 }
3197 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
3198 printk("STALLION: cd1400 not responding, "
3199 "brd=%d panel=%d chip=%d\n",
3200 panelp->brdnr, panelp->panelnr, i);
3201 continue;
3202 }
3203 chipmask |= (0x1 << i);
3204 outb((PPR + uartaddr), ioaddr);
3205 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
3206 }
3207
3208 BRDDISABLE(panelp->brdnr);
3209 return(chipmask);
3210 }
3211
3212 /*****************************************************************************/
3213
3214 /*
3215 * Initialize hardware specific port registers.
3216 */
3217
3218 static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
3219 {
3220 #ifdef DEBUG
3221 printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n",
3222 (int) brdp, (int) panelp, (int) portp);
3223 #endif
3224
3225 if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
3226 (portp == (stlport_t *) NULL))
3227 return;
3228
3229 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
3230 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
3231 portp->uartaddr = (portp->portnr & 0x04) << 5;
3232 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
3233
3234 BRDENABLE(portp->brdnr, portp->pagenr);
3235 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3236 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
3237 portp->hwid = stl_cd1400getreg(portp, GFRCR);
3238 BRDDISABLE(portp->brdnr);
3239 }
3240
3241 /*****************************************************************************/
3242
3243 /*
3244 * Wait for the command register to be ready. We will poll this,
3245 * since it won't usually take too long to be ready.
3246 */
3247
3248 static void stl_cd1400ccrwait(stlport_t *portp)
3249 {
3250 int i;
3251
3252 for (i = 0; (i < CCR_MAXWAIT); i++) {
3253 if (stl_cd1400getreg(portp, CCR) == 0) {
3254 return;
3255 }
3256 }
3257
3258 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
3259 portp->portnr, portp->panelnr, portp->brdnr);
3260 }
3261
3262 /*****************************************************************************/
3263
3264 /*
3265 * Set up the cd1400 registers for a port based on the termios port
3266 * settings.
3267 */
3268
3269 static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp)
3270 {
3271 stlbrd_t *brdp;
3272 unsigned long flags;
3273 unsigned int clkdiv, baudrate;
3274 unsigned char cor1, cor2, cor3;
3275 unsigned char cor4, cor5, ccr;
3276 unsigned char srer, sreron, sreroff;
3277 unsigned char mcor1, mcor2, rtpr;
3278 unsigned char clk, div;
3279
3280 cor1 = 0;
3281 cor2 = 0;
3282 cor3 = 0;
3283 cor4 = 0;
3284 cor5 = 0;
3285 ccr = 0;
3286 rtpr = 0;
3287 clk = 0;
3288 div = 0;
3289 mcor1 = 0;
3290 mcor2 = 0;
3291 sreron = 0;
3292 sreroff = 0;
3293
3294 brdp = stl_brds[portp->brdnr];
3295 if (brdp == (stlbrd_t *) NULL)
3296 return;
3297
3298 /*
3299 * Set up the RX char ignore mask with those RX error types we
3300 * can ignore. We can get the cd1400 to help us out a little here,
3301 * it will ignore parity errors and breaks for us.
3302 */
3303 portp->rxignoremsk = 0;
3304 if (tiosp->c_iflag & IGNPAR) {
3305 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
3306 cor1 |= COR1_PARIGNORE;
3307 }
3308 if (tiosp->c_iflag & IGNBRK) {
3309 portp->rxignoremsk |= ST_BREAK;
3310 cor4 |= COR4_IGNBRK;
3311 }
3312
3313 portp->rxmarkmsk = ST_OVERRUN;
3314 if (tiosp->c_iflag & (INPCK | PARMRK))
3315 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
3316 if (tiosp->c_iflag & BRKINT)
3317 portp->rxmarkmsk |= ST_BREAK;
3318
3319 /*
3320 * Go through the char size, parity and stop bits and set all the
3321 * option register appropriately.
3322 */
3323 switch (tiosp->c_cflag & CSIZE) {
3324 case CS5:
3325 cor1 |= COR1_CHL5;
3326 break;
3327 case CS6:
3328 cor1 |= COR1_CHL6;
3329 break;
3330 case CS7:
3331 cor1 |= COR1_CHL7;
3332 break;
3333 default:
3334 cor1 |= COR1_CHL8;
3335 break;
3336 }
3337
3338 if (tiosp->c_cflag & CSTOPB)
3339 cor1 |= COR1_STOP2;
3340 else
3341 cor1 |= COR1_STOP1;
3342
3343 if (tiosp->c_cflag & PARENB) {
3344 if (tiosp->c_cflag & PARODD)
3345 cor1 |= (COR1_PARENB | COR1_PARODD);
3346 else
3347 cor1 |= (COR1_PARENB | COR1_PAREVEN);
3348 } else {
3349 cor1 |= COR1_PARNONE;
3350 }
3351
3352 /*
3353 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
3354 * space for hardware flow control and the like. This should be set to
3355 * VMIN. Also here we will set the RX data timeout to 10ms - this should
3356 * really be based on VTIME.
3357 */
3358 cor3 |= FIFO_RXTHRESHOLD;
3359 rtpr = 2;
3360
3361 /*
3362 * Calculate the baud rate timers. For now we will just assume that
3363 * the input and output baud are the same. Could have used a baud
3364 * table here, but this way we can generate virtually any baud rate
3365 * we like!
3366 */
3367 baudrate = tiosp->c_cflag & CBAUD;
3368 if (baudrate & CBAUDEX) {
3369 baudrate &= ~CBAUDEX;
3370 if ((baudrate < 1) || (baudrate > 4))
3371 tiosp->c_cflag &= ~CBAUDEX;
3372 else
3373 baudrate += 15;
3374 }
3375 baudrate = stl_baudrates[baudrate];
3376 if ((tiosp->c_cflag & CBAUD) == B38400) {
3377 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3378 baudrate = 57600;
3379 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3380 baudrate = 115200;
3381 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3382 baudrate = 230400;
3383 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3384 baudrate = 460800;
3385 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3386 baudrate = (portp->baud_base / portp->custom_divisor);
3387 }
3388 if (baudrate > STL_CD1400MAXBAUD)
3389 baudrate = STL_CD1400MAXBAUD;
3390
3391 if (baudrate > 0) {
3392 for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
3393 clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
3394 if (clkdiv < 0x100)
3395 break;
3396 }
3397 div = (unsigned char) clkdiv;
3398 }
3399
3400 /*
3401 * Check what form of modem signaling is required and set it up.
3402 */
3403 if ((tiosp->c_cflag & CLOCAL) == 0) {
3404 mcor1 |= MCOR1_DCD;
3405 mcor2 |= MCOR2_DCD;
3406 sreron |= SRER_MODEM;
3407 portp->flags |= ASYNC_CHECK_CD;
3408 } else {
3409 portp->flags &= ~ASYNC_CHECK_CD;
3410 }
3411
3412 /*
3413 * Setup cd1400 enhanced modes if we can. In particular we want to
3414 * handle as much of the flow control as possible automatically. As
3415 * well as saving a few CPU cycles it will also greatly improve flow
3416 * control reliability.
3417 */
3418 if (tiosp->c_iflag & IXON) {
3419 cor2 |= COR2_TXIBE;
3420 cor3 |= COR3_SCD12;
3421 if (tiosp->c_iflag & IXANY)
3422 cor2 |= COR2_IXM;
3423 }
3424
3425 if (tiosp->c_cflag & CRTSCTS) {
3426 cor2 |= COR2_CTSAE;
3427 mcor1 |= FIFO_RTSTHRESHOLD;
3428 }
3429
3430 /*
3431 * All cd1400 register values calculated so go through and set
3432 * them all up.
3433 */
3434
3435 #ifdef DEBUG
3436 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3437 portp->portnr, portp->panelnr, portp->brdnr);
3438 printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3439 cor1, cor2, cor3, cor4, cor5);
3440 printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3441 mcor1, mcor2, rtpr, sreron, sreroff);
3442 printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3443 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3444 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3445 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3446 #endif
3447
3448 save_flags(flags);
3449 cli();
3450 BRDENABLE(portp->brdnr, portp->pagenr);
3451 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3452 srer = stl_cd1400getreg(portp, SRER);
3453 stl_cd1400setreg(portp, SRER, 0);
3454 if (stl_cd1400updatereg(portp, COR1, cor1))
3455 ccr = 1;
3456 if (stl_cd1400updatereg(portp, COR2, cor2))
3457 ccr = 1;
3458 if (stl_cd1400updatereg(portp, COR3, cor3))
3459 ccr = 1;
3460 if (ccr) {
3461 stl_cd1400ccrwait(portp);
3462 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3463 }
3464 stl_cd1400setreg(portp, COR4, cor4);
3465 stl_cd1400setreg(portp, COR5, cor5);
3466 stl_cd1400setreg(portp, MCOR1, mcor1);
3467 stl_cd1400setreg(portp, MCOR2, mcor2);
3468 if (baudrate > 0) {
3469 stl_cd1400setreg(portp, TCOR, clk);
3470 stl_cd1400setreg(portp, TBPR, div);
3471 stl_cd1400setreg(portp, RCOR, clk);
3472 stl_cd1400setreg(portp, RBPR, div);
3473 }
3474 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3475 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3476 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3477 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3478 stl_cd1400setreg(portp, RTPR, rtpr);
3479 mcor1 = stl_cd1400getreg(portp, MSVR1);
3480 if (mcor1 & MSVR1_DCD)
3481 portp->sigs |= TIOCM_CD;
3482 else
3483 portp->sigs &= ~TIOCM_CD;
3484 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3485 BRDDISABLE(portp->brdnr);
3486 restore_flags(flags);
3487 }
3488
3489 /*****************************************************************************/
3490
3491 /*
3492 * Set the state of the DTR and RTS signals.
3493 */
3494
3495 static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts)
3496 {
3497 unsigned char msvr1, msvr2;
3498 unsigned long flags;
3499
3500 #ifdef DEBUG
3501 printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n",
3502 (int) portp, dtr, rts);
3503 #endif
3504
3505 msvr1 = 0;
3506 msvr2 = 0;
3507 if (dtr > 0)
3508 msvr1 = MSVR1_DTR;
3509 if (rts > 0)
3510 msvr2 = MSVR2_RTS;
3511
3512 save_flags(flags);
3513 cli();
3514 BRDENABLE(portp->brdnr, portp->pagenr);
3515 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3516 if (rts >= 0)
3517 stl_cd1400setreg(portp, MSVR2, msvr2);
3518 if (dtr >= 0)
3519 stl_cd1400setreg(portp, MSVR1, msvr1);
3520 BRDDISABLE(portp->brdnr);
3521 restore_flags(flags);
3522 }
3523
3524 /*****************************************************************************/
3525
3526 /*
3527 * Return the state of the signals.
3528 */
3529
3530 static int stl_cd1400getsignals(stlport_t *portp)
3531 {
3532 unsigned char msvr1, msvr2;
3533 unsigned long flags;
3534 int sigs;
3535
3536 #ifdef DEBUG
3537 printk("stl_cd1400getsignals(portp=%x)\n", (int) portp);
3538 #endif
3539
3540 save_flags(flags);
3541 cli();
3542 BRDENABLE(portp->brdnr, portp->pagenr);
3543 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3544 msvr1 = stl_cd1400getreg(portp, MSVR1);
3545 msvr2 = stl_cd1400getreg(portp, MSVR2);
3546 BRDDISABLE(portp->brdnr);
3547 restore_flags(flags);
3548
3549 sigs = 0;
3550 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3551 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3552 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3553 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3554 #if 0
3555 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3556 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3557 #else
3558 sigs |= TIOCM_DSR;
3559 #endif
3560 return(sigs);
3561 }
3562
3563 /*****************************************************************************/
3564
3565 /*
3566 * Enable/Disable the Transmitter and/or Receiver.
3567 */
3568
3569 static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx)
3570 {
3571 unsigned char ccr;
3572 unsigned long flags;
3573
3574 #ifdef DEBUG
3575 printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n",
3576 (int) portp, rx, tx);
3577 #endif
3578 ccr = 0;
3579
3580 if (tx == 0)
3581 ccr |= CCR_TXDISABLE;
3582 else if (tx > 0)
3583 ccr |= CCR_TXENABLE;
3584 if (rx == 0)
3585 ccr |= CCR_RXDISABLE;
3586 else if (rx > 0)
3587 ccr |= CCR_RXENABLE;
3588
3589 save_flags(flags);
3590 cli();
3591 BRDENABLE(portp->brdnr, portp->pagenr);
3592 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3593 stl_cd1400ccrwait(portp);
3594 stl_cd1400setreg(portp, CCR, ccr);
3595 stl_cd1400ccrwait(portp);
3596 BRDDISABLE(portp->brdnr);
3597 restore_flags(flags);
3598 }
3599
3600 /*****************************************************************************/
3601
3602 /*
3603 * Start/stop the Transmitter and/or Receiver.
3604 */
3605
3606 static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx)
3607 {
3608 unsigned char sreron, sreroff;
3609 unsigned long flags;
3610
3611 #ifdef DEBUG
3612 printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n",
3613 (int) portp, rx, tx);
3614 #endif
3615
3616 sreron = 0;
3617 sreroff = 0;
3618 if (tx == 0)
3619 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3620 else if (tx == 1)
3621 sreron |= SRER_TXDATA;
3622 else if (tx >= 2)
3623 sreron |= SRER_TXEMPTY;
3624 if (rx == 0)
3625 sreroff |= SRER_RXDATA;
3626 else if (rx > 0)
3627 sreron |= SRER_RXDATA;
3628
3629 save_flags(flags);
3630 cli();
3631 BRDENABLE(portp->brdnr, portp->pagenr);
3632 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3633 stl_cd1400setreg(portp, SRER,
3634 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3635 BRDDISABLE(portp->brdnr);
3636 if (tx > 0)
3637 set_bit(ASYI_TXBUSY, &portp->istate);
3638 restore_flags(flags);
3639 }
3640
3641 /*****************************************************************************/
3642
3643 /*
3644 * Disable all interrupts from this port.
3645 */
3646
3647 static void stl_cd1400disableintrs(stlport_t *portp)
3648 {
3649 unsigned long flags;
3650
3651 #ifdef DEBUG
3652 printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp);
3653 #endif
3654 save_flags(flags);
3655 cli();
3656 BRDENABLE(portp->brdnr, portp->pagenr);
3657 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3658 stl_cd1400setreg(portp, SRER, 0);
3659 BRDDISABLE(portp->brdnr);
3660 restore_flags(flags);
3661 }
3662
3663 /*****************************************************************************/
3664
3665 static void stl_cd1400sendbreak(stlport_t *portp, int len)
3666 {
3667 unsigned long flags;
3668
3669 #ifdef DEBUG
3670 printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len);
3671 #endif
3672
3673 save_flags(flags);
3674 cli();
3675 BRDENABLE(portp->brdnr, portp->pagenr);
3676 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3677 stl_cd1400setreg(portp, SRER,
3678 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3679 SRER_TXEMPTY));
3680 BRDDISABLE(portp->brdnr);
3681 portp->brklen = len;
3682 if (len == 1)
3683 portp->stats.txbreaks++;
3684 restore_flags(flags);
3685 }
3686
3687 /*****************************************************************************/
3688
3689 /*
3690 * Take flow control actions...
3691 */
3692
3693 static void stl_cd1400flowctrl(stlport_t *portp, int state)
3694 {
3695 struct tty_struct *tty;
3696 unsigned long flags;
3697
3698 #ifdef DEBUG
3699 printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state);
3700 #endif
3701
3702 if (portp == (stlport_t *) NULL)
3703 return;
3704 tty = portp->tty;
3705 if (tty == (struct tty_struct *) NULL)
3706 return;
3707
3708 save_flags(flags);
3709 cli();
3710 BRDENABLE(portp->brdnr, portp->pagenr);
3711 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3712
3713 if (state) {
3714 if (tty->termios->c_iflag & IXOFF) {
3715 stl_cd1400ccrwait(portp);
3716 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3717 portp->stats.rxxon++;
3718 stl_cd1400ccrwait(portp);
3719 }
3720 /*
3721 * Question: should we return RTS to what it was before? It may
3722 * have been set by an ioctl... Suppose not, since if you have
3723 * hardware flow control set then it is pretty silly to go and
3724 * set the RTS line by hand.
3725 */
3726 if (tty->termios->c_cflag & CRTSCTS) {
3727 stl_cd1400setreg(portp, MCOR1,
3728 (stl_cd1400getreg(portp, MCOR1) |
3729 FIFO_RTSTHRESHOLD));
3730 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3731 portp->stats.rxrtson++;
3732 }
3733 } else {
3734 if (tty->termios->c_iflag & IXOFF) {
3735 stl_cd1400ccrwait(portp);
3736 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3737 portp->stats.rxxoff++;
3738 stl_cd1400ccrwait(portp);
3739 }
3740 if (tty->termios->c_cflag & CRTSCTS) {
3741 stl_cd1400setreg(portp, MCOR1,
3742 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3743 stl_cd1400setreg(portp, MSVR2, 0);
3744 portp->stats.rxrtsoff++;
3745 }
3746 }
3747
3748 BRDDISABLE(portp->brdnr);
3749 restore_flags(flags);
3750 }
3751
3752 /*****************************************************************************/
3753
3754 /*
3755 * Send a flow control character...
3756 */
3757
3758 static void stl_cd1400sendflow(stlport_t *portp, int state)
3759 {
3760 struct tty_struct *tty;
3761 unsigned long flags;
3762
3763 #ifdef DEBUG
3764 printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state);
3765 #endif
3766
3767 if (portp == (stlport_t *) NULL)
3768 return;
3769 tty = portp->tty;
3770 if (tty == (struct tty_struct *) NULL)
3771 return;
3772
3773 save_flags(flags);
3774 cli();
3775 BRDENABLE(portp->brdnr, portp->pagenr);
3776 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3777 if (state) {
3778 stl_cd1400ccrwait(portp);
3779 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3780 portp->stats.rxxon++;
3781 stl_cd1400ccrwait(portp);
3782 } else {
3783 stl_cd1400ccrwait(portp);
3784 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3785 portp->stats.rxxoff++;
3786 stl_cd1400ccrwait(portp);
3787 }
3788 BRDDISABLE(portp->brdnr);
3789 restore_flags(flags);
3790 }
3791
3792 /*****************************************************************************/
3793
3794 static void stl_cd1400flush(stlport_t *portp)
3795 {
3796 unsigned long flags;
3797
3798 #ifdef DEBUG
3799 printk("stl_cd1400flush(portp=%x)\n", (int) portp);
3800 #endif
3801
3802 if (portp == (stlport_t *) NULL)
3803 return;
3804
3805 save_flags(flags);
3806 cli();
3807 BRDENABLE(portp->brdnr, portp->pagenr);
3808 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3809 stl_cd1400ccrwait(portp);
3810 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3811 stl_cd1400ccrwait(portp);
3812 portp->tx.tail = portp->tx.head;
3813 BRDDISABLE(portp->brdnr);
3814 restore_flags(flags);
3815 }
3816
3817 /*****************************************************************************/
3818
3819 /*
3820 * Return the current state of data flow on this port. This is only
3821 * really interresting when determining if data has fully completed
3822 * transmission or not... This is easy for the cd1400, it accurately
3823 * maintains the busy port flag.
3824 */
3825
3826 static int stl_cd1400datastate(stlport_t *portp)
3827 {
3828 #ifdef DEBUG
3829 printk("stl_cd1400datastate(portp=%x)\n", (int) portp);
3830 #endif
3831
3832 if (portp == (stlport_t *) NULL)
3833 return(0);
3834
3835 return(test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0);
3836 }
3837
3838 /*****************************************************************************/
3839
3840 /*
3841 * Interrupt service routine for cd1400 EasyIO boards.
3842 */
3843
3844 static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase)
3845 {
3846 unsigned char svrtype;
3847
3848 #ifdef DEBUG
3849 printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n",
3850 (int) panelp, iobase);
3851 #endif
3852
3853 outb(SVRR, iobase);
3854 svrtype = inb(iobase + EREG_DATA);
3855 if (panelp->nrports > 4) {
3856 outb((SVRR + 0x80), iobase);
3857 svrtype |= inb(iobase + EREG_DATA);
3858 }
3859
3860 if (svrtype & SVRR_RX)
3861 stl_cd1400rxisr(panelp, iobase);
3862 else if (svrtype & SVRR_TX)
3863 stl_cd1400txisr(panelp, iobase);
3864 else if (svrtype & SVRR_MDM)
3865 stl_cd1400mdmisr(panelp, iobase);
3866 }
3867
3868 /*****************************************************************************/
3869
3870 /*
3871 * Interrupt service routine for cd1400 panels.
3872 */
3873
3874 static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase)
3875 {
3876 unsigned char svrtype;
3877
3878 #ifdef DEBUG
3879 printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp,
3880 iobase);
3881 #endif
3882
3883 outb(SVRR, iobase);
3884 svrtype = inb(iobase + EREG_DATA);
3885 outb((SVRR + 0x80), iobase);
3886 svrtype |= inb(iobase + EREG_DATA);
3887 if (svrtype & SVRR_RX)
3888 stl_cd1400rxisr(panelp, iobase);
3889 else if (svrtype & SVRR_TX)
3890 stl_cd1400txisr(panelp, iobase);
3891 else if (svrtype & SVRR_MDM)
3892 stl_cd1400mdmisr(panelp, iobase);
3893 }
3894
3895
3896 /*****************************************************************************/
3897
3898 /*
3899 * Unfortunately we need to handle breaks in the TX data stream, since
3900 * this is the only way to generate them on the cd1400.
3901 */
3902
3903 static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr)
3904 {
3905 if (portp->brklen == 1) {
3906 outb((COR2 + portp->uartaddr), ioaddr);
3907 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3908 (ioaddr + EREG_DATA));
3909 outb((TDR + portp->uartaddr), ioaddr);
3910 outb(ETC_CMD, (ioaddr + EREG_DATA));
3911 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3912 outb((SRER + portp->uartaddr), ioaddr);
3913 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3914 (ioaddr + EREG_DATA));
3915 return(1);
3916 } else if (portp->brklen > 1) {
3917 outb((TDR + portp->uartaddr), ioaddr);
3918 outb(ETC_CMD, (ioaddr + EREG_DATA));
3919 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3920 portp->brklen = -1;
3921 return(1);
3922 } else {
3923 outb((COR2 + portp->uartaddr), ioaddr);
3924 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3925 (ioaddr + EREG_DATA));
3926 portp->brklen = 0;
3927 }
3928 return(0);
3929 }
3930
3931 /*****************************************************************************/
3932
3933 /*
3934 * Transmit interrupt handler. This has gotta be fast! Handling TX
3935 * chars is pretty simple, stuff as many as possible from the TX buffer
3936 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3937 * are embedded as commands in the data stream. Oh no, had to use a goto!
3938 * This could be optimized more, will do when I get time...
3939 * In practice it is possible that interrupts are enabled but that the
3940 * port has been hung up. Need to handle not having any TX buffer here,
3941 * this is done by using the side effect that head and tail will also
3942 * be NULL if the buffer has been freed.
3943 */
3944
3945 static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr)
3946 {
3947 stlport_t *portp;
3948 int len, stlen;
3949 char *head, *tail;
3950 unsigned char ioack, srer;
3951
3952 #ifdef DEBUG
3953 printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
3954 #endif
3955
3956 ioack = inb(ioaddr + EREG_TXACK);
3957 if (((ioack & panelp->ackmask) != 0) ||
3958 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3959 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3960 return;
3961 }
3962 portp = panelp->ports[(ioack >> 3)];
3963
3964 /*
3965 * Unfortunately we need to handle breaks in the data stream, since
3966 * this is the only way to generate them on the cd1400. Do it now if
3967 * a break is to be sent.
3968 */
3969 if (portp->brklen != 0)
3970 if (stl_cd1400breakisr(portp, ioaddr))
3971 goto stl_txalldone;
3972
3973 head = portp->tx.head;
3974 tail = portp->tx.tail;
3975 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3976 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3977 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3978 set_bit(ASYI_TXLOW, &portp->istate);
3979 schedule_work(&portp->tqueue);
3980 }
3981
3982 if (len == 0) {
3983 outb((SRER + portp->uartaddr), ioaddr);
3984 srer = inb(ioaddr + EREG_DATA);
3985 if (srer & SRER_TXDATA) {
3986 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3987 } else {
3988 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3989 clear_bit(ASYI_TXBUSY, &portp->istate);
3990 }
3991 outb(srer, (ioaddr + EREG_DATA));
3992 } else {
3993 len = MIN(len, CD1400_TXFIFOSIZE);
3994 portp->stats.txtotal += len;
3995 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3996 outb((TDR + portp->uartaddr), ioaddr);
3997 outsb((ioaddr + EREG_DATA), tail, stlen);
3998 len -= stlen;
3999 tail += stlen;
4000 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4001 tail = portp->tx.buf;
4002 if (len > 0) {
4003 outsb((ioaddr + EREG_DATA), tail, len);
4004 tail += len;
4005 }
4006 portp->tx.tail = tail;
4007 }
4008
4009 stl_txalldone:
4010 outb((EOSRR + portp->uartaddr), ioaddr);
4011 outb(0, (ioaddr + EREG_DATA));
4012 }
4013
4014 /*****************************************************************************/
4015
4016 /*
4017 * Receive character interrupt handler. Determine if we have good chars
4018 * or bad chars and then process appropriately. Good chars are easy
4019 * just shove the lot into the RX buffer and set all status byte to 0.
4020 * If a bad RX char then process as required. This routine needs to be
4021 * fast! In practice it is possible that we get an interrupt on a port
4022 * that is closed. This can happen on hangups - since they completely
4023 * shutdown a port not in user context. Need to handle this case.
4024 */
4025
4026 static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr)
4027 {
4028 stlport_t *portp;
4029 struct tty_struct *tty;
4030 unsigned int ioack, len, buflen;
4031 unsigned char status;
4032 char ch;
4033
4034 #ifdef DEBUG
4035 printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
4036 #endif
4037
4038 ioack = inb(ioaddr + EREG_RXACK);
4039 if ((ioack & panelp->ackmask) != 0) {
4040 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
4041 return;
4042 }
4043 portp = panelp->ports[(ioack >> 3)];
4044 tty = portp->tty;
4045
4046 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
4047 outb((RDCR + portp->uartaddr), ioaddr);
4048 len = inb(ioaddr + EREG_DATA);
4049 if ((tty == (struct tty_struct *) NULL) ||
4050 (tty->flip.char_buf_ptr == (char *) NULL) ||
4051 ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) {
4052 len = MIN(len, sizeof(stl_unwanted));
4053 outb((RDSR + portp->uartaddr), ioaddr);
4054 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
4055 portp->stats.rxlost += len;
4056 portp->stats.rxtotal += len;
4057 } else {
4058 len = MIN(len, buflen);
4059 if (len > 0) {
4060 outb((RDSR + portp->uartaddr), ioaddr);
4061 insb((ioaddr + EREG_DATA), tty->flip.char_buf_ptr, len);
4062 memset(tty->flip.flag_buf_ptr, 0, len);
4063 tty->flip.flag_buf_ptr += len;
4064 tty->flip.char_buf_ptr += len;
4065 tty->flip.count += len;
4066 tty_schedule_flip(tty);
4067 portp->stats.rxtotal += len;
4068 }
4069 }
4070 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
4071 outb((RDSR + portp->uartaddr), ioaddr);
4072 status = inb(ioaddr + EREG_DATA);
4073 ch = inb(ioaddr + EREG_DATA);
4074 if (status & ST_PARITY)
4075 portp->stats.rxparity++;
4076 if (status & ST_FRAMING)
4077 portp->stats.rxframing++;
4078 if (status & ST_OVERRUN)
4079 portp->stats.rxoverrun++;
4080 if (status & ST_BREAK)
4081 portp->stats.rxbreaks++;
4082 if (status & ST_SCHARMASK) {
4083 if ((status & ST_SCHARMASK) == ST_SCHAR1)
4084 portp->stats.txxon++;
4085 if ((status & ST_SCHARMASK) == ST_SCHAR2)
4086 portp->stats.txxoff++;
4087 goto stl_rxalldone;
4088 }
4089 if ((tty != (struct tty_struct *) NULL) &&
4090 ((portp->rxignoremsk & status) == 0)) {
4091 if (portp->rxmarkmsk & status) {
4092 if (status & ST_BREAK) {
4093 status = TTY_BREAK;
4094 if (portp->flags & ASYNC_SAK) {
4095 do_SAK(tty);
4096 BRDENABLE(portp->brdnr, portp->pagenr);
4097 }
4098 } else if (status & ST_PARITY) {
4099 status = TTY_PARITY;
4100 } else if (status & ST_FRAMING) {
4101 status = TTY_FRAME;
4102 } else if(status & ST_OVERRUN) {
4103 status = TTY_OVERRUN;
4104 } else {
4105 status = 0;
4106 }
4107 } else {
4108 status = 0;
4109 }
4110 if (tty->flip.char_buf_ptr != (char *) NULL) {
4111 if (tty->flip.count < TTY_FLIPBUF_SIZE) {
4112 *tty->flip.flag_buf_ptr++ = status;
4113 *tty->flip.char_buf_ptr++ = ch;
4114 tty->flip.count++;
4115 }
4116 tty_schedule_flip(tty);
4117 }
4118 }
4119 } else {
4120 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
4121 return;
4122 }
4123
4124 stl_rxalldone:
4125 outb((EOSRR + portp->uartaddr), ioaddr);
4126 outb(0, (ioaddr + EREG_DATA));
4127 }
4128
4129 /*****************************************************************************/
4130
4131 /*
4132 * Modem interrupt handler. The is called when the modem signal line
4133 * (DCD) has changed state. Leave most of the work to the off-level
4134 * processing routine.
4135 */
4136
4137 static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr)
4138 {
4139 stlport_t *portp;
4140 unsigned int ioack;
4141 unsigned char misr;
4142
4143 #ifdef DEBUG
4144 printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp);
4145 #endif
4146
4147 ioack = inb(ioaddr + EREG_MDACK);
4148 if (((ioack & panelp->ackmask) != 0) ||
4149 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
4150 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
4151 return;
4152 }
4153 portp = panelp->ports[(ioack >> 3)];
4154
4155 outb((MISR + portp->uartaddr), ioaddr);
4156 misr = inb(ioaddr + EREG_DATA);
4157 if (misr & MISR_DCD) {
4158 set_bit(ASYI_DCDCHANGE, &portp->istate);
4159 schedule_work(&portp->tqueue);
4160 portp->stats.modem++;
4161 }
4162
4163 outb((EOSRR + portp->uartaddr), ioaddr);
4164 outb(0, (ioaddr + EREG_DATA));
4165 }
4166
4167 /*****************************************************************************/
4168 /* SC26198 HARDWARE FUNCTIONS */
4169 /*****************************************************************************/
4170
4171 /*
4172 * These functions get/set/update the registers of the sc26198 UARTs.
4173 * Access to the sc26198 registers is via an address/data io port pair.
4174 * (Maybe should make this inline...)
4175 */
4176
4177 static int stl_sc26198getreg(stlport_t *portp, int regnr)
4178 {
4179 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4180 return(inb(portp->ioaddr + XP_DATA));
4181 }
4182
4183 static void stl_sc26198setreg(stlport_t *portp, int regnr, int value)
4184 {
4185 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4186 outb(value, (portp->ioaddr + XP_DATA));
4187 }
4188
4189 static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value)
4190 {
4191 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4192 if (inb(portp->ioaddr + XP_DATA) != value) {
4193 outb(value, (portp->ioaddr + XP_DATA));
4194 return(1);
4195 }
4196 return(0);
4197 }
4198
4199 /*****************************************************************************/
4200
4201 /*
4202 * Functions to get and set the sc26198 global registers.
4203 */
4204
4205 static int stl_sc26198getglobreg(stlport_t *portp, int regnr)
4206 {
4207 outb(regnr, (portp->ioaddr + XP_ADDR));
4208 return(inb(portp->ioaddr + XP_DATA));
4209 }
4210
4211 #if 0
4212 static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value)
4213 {
4214 outb(regnr, (portp->ioaddr + XP_ADDR));
4215 outb(value, (portp->ioaddr + XP_DATA));
4216 }
4217 #endif
4218
4219 /*****************************************************************************/
4220
4221 /*
4222 * Inbitialize the UARTs in a panel. We don't care what sort of board
4223 * these ports are on - since the port io registers are almost
4224 * identical when dealing with ports.
4225 */
4226
4227 static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
4228 {
4229 int chipmask, i;
4230 int nrchips, ioaddr;
4231
4232 #ifdef DEBUG
4233 printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n",
4234 (int) brdp, (int) panelp);
4235 #endif
4236
4237 BRDENABLE(panelp->brdnr, panelp->pagenr);
4238
4239 /*
4240 * Check that each chip is present and started up OK.
4241 */
4242 chipmask = 0;
4243 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
4244 if (brdp->brdtype == BRD_ECHPCI)
4245 outb(panelp->pagenr, brdp->ioctrl);
4246
4247 for (i = 0; (i < nrchips); i++) {
4248 ioaddr = panelp->iobase + (i * 4);
4249 outb(SCCR, (ioaddr + XP_ADDR));
4250 outb(CR_RESETALL, (ioaddr + XP_DATA));
4251 outb(TSTR, (ioaddr + XP_ADDR));
4252 if (inb(ioaddr + XP_DATA) != 0) {
4253 printk("STALLION: sc26198 not responding, "
4254 "brd=%d panel=%d chip=%d\n",
4255 panelp->brdnr, panelp->panelnr, i);
4256 continue;
4257 }
4258 chipmask |= (0x1 << i);
4259 outb(GCCR, (ioaddr + XP_ADDR));
4260 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
4261 outb(WDTRCR, (ioaddr + XP_ADDR));
4262 outb(0xff, (ioaddr + XP_DATA));
4263 }
4264
4265 BRDDISABLE(panelp->brdnr);
4266 return(chipmask);
4267 }
4268
4269 /*****************************************************************************/
4270
4271 /*
4272 * Initialize hardware specific port registers.
4273 */
4274
4275 static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
4276 {
4277 #ifdef DEBUG
4278 printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n",
4279 (int) brdp, (int) panelp, (int) portp);
4280 #endif
4281
4282 if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
4283 (portp == (stlport_t *) NULL))
4284 return;
4285
4286 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
4287 portp->uartaddr = (portp->portnr & 0x07) << 4;
4288 portp->pagenr = panelp->pagenr;
4289 portp->hwid = 0x1;
4290
4291 BRDENABLE(portp->brdnr, portp->pagenr);
4292 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
4293 BRDDISABLE(portp->brdnr);
4294 }
4295
4296 /*****************************************************************************/
4297
4298 /*
4299 * Set up the sc26198 registers for a port based on the termios port
4300 * settings.
4301 */
4302
4303 static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp)
4304 {
4305 stlbrd_t *brdp;
4306 unsigned long flags;
4307 unsigned int baudrate;
4308 unsigned char mr0, mr1, mr2, clk;
4309 unsigned char imron, imroff, iopr, ipr;
4310
4311 mr0 = 0;
4312 mr1 = 0;
4313 mr2 = 0;
4314 clk = 0;
4315 iopr = 0;
4316 imron = 0;
4317 imroff = 0;
4318
4319 brdp = stl_brds[portp->brdnr];
4320 if (brdp == (stlbrd_t *) NULL)
4321 return;
4322
4323 /*
4324 * Set up the RX char ignore mask with those RX error types we
4325 * can ignore.
4326 */
4327 portp->rxignoremsk = 0;
4328 if (tiosp->c_iflag & IGNPAR)
4329 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
4330 SR_RXOVERRUN);
4331 if (tiosp->c_iflag & IGNBRK)
4332 portp->rxignoremsk |= SR_RXBREAK;
4333
4334 portp->rxmarkmsk = SR_RXOVERRUN;
4335 if (tiosp->c_iflag & (INPCK | PARMRK))
4336 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
4337 if (tiosp->c_iflag & BRKINT)
4338 portp->rxmarkmsk |= SR_RXBREAK;
4339
4340 /*
4341 * Go through the char size, parity and stop bits and set all the
4342 * option register appropriately.
4343 */
4344 switch (tiosp->c_cflag & CSIZE) {
4345 case CS5:
4346 mr1 |= MR1_CS5;
4347 break;
4348 case CS6:
4349 mr1 |= MR1_CS6;
4350 break;
4351 case CS7:
4352 mr1 |= MR1_CS7;
4353 break;
4354 default:
4355 mr1 |= MR1_CS8;
4356 break;
4357 }
4358
4359 if (tiosp->c_cflag & CSTOPB)
4360 mr2 |= MR2_STOP2;
4361 else
4362 mr2 |= MR2_STOP1;
4363
4364 if (tiosp->c_cflag & PARENB) {
4365 if (tiosp->c_cflag & PARODD)
4366 mr1 |= (MR1_PARENB | MR1_PARODD);
4367 else
4368 mr1 |= (MR1_PARENB | MR1_PAREVEN);
4369 } else {
4370 mr1 |= MR1_PARNONE;
4371 }
4372
4373 mr1 |= MR1_ERRBLOCK;
4374
4375 /*
4376 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
4377 * space for hardware flow control and the like. This should be set to
4378 * VMIN.
4379 */
4380 mr2 |= MR2_RXFIFOHALF;
4381
4382 /*
4383 * Calculate the baud rate timers. For now we will just assume that
4384 * the input and output baud are the same. The sc26198 has a fixed
4385 * baud rate table, so only discrete baud rates possible.
4386 */
4387 baudrate = tiosp->c_cflag & CBAUD;
4388 if (baudrate & CBAUDEX) {
4389 baudrate &= ~CBAUDEX;
4390 if ((baudrate < 1) || (baudrate > 4))
4391 tiosp->c_cflag &= ~CBAUDEX;
4392 else
4393 baudrate += 15;
4394 }
4395 baudrate = stl_baudrates[baudrate];
4396 if ((tiosp->c_cflag & CBAUD) == B38400) {
4397 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
4398 baudrate = 57600;
4399 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
4400 baudrate = 115200;
4401 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
4402 baudrate = 230400;
4403 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
4404 baudrate = 460800;
4405 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
4406 baudrate = (portp->baud_base / portp->custom_divisor);
4407 }
4408 if (baudrate > STL_SC26198MAXBAUD)
4409 baudrate = STL_SC26198MAXBAUD;
4410
4411 if (baudrate > 0) {
4412 for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
4413 if (baudrate <= sc26198_baudtable[clk])
4414 break;
4415 }
4416 }
4417
4418 /*
4419 * Check what form of modem signaling is required and set it up.
4420 */
4421 if (tiosp->c_cflag & CLOCAL) {
4422 portp->flags &= ~ASYNC_CHECK_CD;
4423 } else {
4424 iopr |= IOPR_DCDCOS;
4425 imron |= IR_IOPORT;
4426 portp->flags |= ASYNC_CHECK_CD;
4427 }
4428
4429 /*
4430 * Setup sc26198 enhanced modes if we can. In particular we want to
4431 * handle as much of the flow control as possible automatically. As
4432 * well as saving a few CPU cycles it will also greatly improve flow
4433 * control reliability.
4434 */
4435 if (tiosp->c_iflag & IXON) {
4436 mr0 |= MR0_SWFTX | MR0_SWFT;
4437 imron |= IR_XONXOFF;
4438 } else {
4439 imroff |= IR_XONXOFF;
4440 }
4441 if (tiosp->c_iflag & IXOFF)
4442 mr0 |= MR0_SWFRX;
4443
4444 if (tiosp->c_cflag & CRTSCTS) {
4445 mr2 |= MR2_AUTOCTS;
4446 mr1 |= MR1_AUTORTS;
4447 }
4448
4449 /*
4450 * All sc26198 register values calculated so go through and set
4451 * them all up.
4452 */
4453
4454 #ifdef DEBUG
4455 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
4456 portp->portnr, portp->panelnr, portp->brdnr);
4457 printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
4458 printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
4459 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
4460 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
4461 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
4462 #endif
4463
4464 save_flags(flags);
4465 cli();
4466 BRDENABLE(portp->brdnr, portp->pagenr);
4467 stl_sc26198setreg(portp, IMR, 0);
4468 stl_sc26198updatereg(portp, MR0, mr0);
4469 stl_sc26198updatereg(portp, MR1, mr1);
4470 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
4471 stl_sc26198updatereg(portp, MR2, mr2);
4472 stl_sc26198updatereg(portp, IOPIOR,
4473 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4474
4475 if (baudrate > 0) {
4476 stl_sc26198setreg(portp, TXCSR, clk);
4477 stl_sc26198setreg(portp, RXCSR, clk);
4478 }
4479
4480 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4481 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4482
4483 ipr = stl_sc26198getreg(portp, IPR);
4484 if (ipr & IPR_DCD)
4485 portp->sigs &= ~TIOCM_CD;
4486 else
4487 portp->sigs |= TIOCM_CD;
4488
4489 portp->imr = (portp->imr & ~imroff) | imron;
4490 stl_sc26198setreg(portp, IMR, portp->imr);
4491 BRDDISABLE(portp->brdnr);
4492 restore_flags(flags);
4493 }
4494
4495 /*****************************************************************************/
4496
4497 /*
4498 * Set the state of the DTR and RTS signals.
4499 */
4500
4501 static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts)
4502 {
4503 unsigned char iopioron, iopioroff;
4504 unsigned long flags;
4505
4506 #ifdef DEBUG
4507 printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n",
4508 (int) portp, dtr, rts);
4509 #endif
4510
4511 iopioron = 0;
4512 iopioroff = 0;
4513 if (dtr == 0)
4514 iopioroff |= IPR_DTR;
4515 else if (dtr > 0)
4516 iopioron |= IPR_DTR;
4517 if (rts == 0)
4518 iopioroff |= IPR_RTS;
4519 else if (rts > 0)
4520 iopioron |= IPR_RTS;
4521
4522 save_flags(flags);
4523 cli();
4524 BRDENABLE(portp->brdnr, portp->pagenr);
4525 stl_sc26198setreg(portp, IOPIOR,
4526 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4527 BRDDISABLE(portp->brdnr);
4528 restore_flags(flags);
4529 }
4530
4531 /*****************************************************************************/
4532
4533 /*
4534 * Return the state of the signals.
4535 */
4536
4537 static int stl_sc26198getsignals(stlport_t *portp)
4538 {
4539 unsigned char ipr;
4540 unsigned long flags;
4541 int sigs;
4542
4543 #ifdef DEBUG
4544 printk("stl_sc26198getsignals(portp=%x)\n", (int) portp);
4545 #endif
4546
4547 save_flags(flags);
4548 cli();
4549 BRDENABLE(portp->brdnr, portp->pagenr);
4550 ipr = stl_sc26198getreg(portp, IPR);
4551 BRDDISABLE(portp->brdnr);
4552 restore_flags(flags);
4553
4554 sigs = 0;
4555 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4556 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4557 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4558 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4559 sigs |= TIOCM_DSR;
4560 return(sigs);
4561 }
4562
4563 /*****************************************************************************/
4564
4565 /*
4566 * Enable/Disable the Transmitter and/or Receiver.
4567 */
4568
4569 static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx)
4570 {
4571 unsigned char ccr;
4572 unsigned long flags;
4573
4574 #ifdef DEBUG
4575 printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n",
4576 (int) portp, rx, tx);
4577 #endif
4578
4579 ccr = portp->crenable;
4580 if (tx == 0)
4581 ccr &= ~CR_TXENABLE;
4582 else if (tx > 0)
4583 ccr |= CR_TXENABLE;
4584 if (rx == 0)
4585 ccr &= ~CR_RXENABLE;
4586 else if (rx > 0)
4587 ccr |= CR_RXENABLE;
4588
4589 save_flags(flags);
4590 cli();
4591 BRDENABLE(portp->brdnr, portp->pagenr);
4592 stl_sc26198setreg(portp, SCCR, ccr);
4593 BRDDISABLE(portp->brdnr);
4594 portp->crenable = ccr;
4595 restore_flags(flags);
4596 }
4597
4598 /*****************************************************************************/
4599
4600 /*
4601 * Start/stop the Transmitter and/or Receiver.
4602 */
4603
4604 static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx)
4605 {
4606 unsigned char imr;
4607 unsigned long flags;
4608
4609 #ifdef DEBUG
4610 printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n",
4611 (int) portp, rx, tx);
4612 #endif
4613
4614 imr = portp->imr;
4615 if (tx == 0)
4616 imr &= ~IR_TXRDY;
4617 else if (tx == 1)
4618 imr |= IR_TXRDY;
4619 if (rx == 0)
4620 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4621 else if (rx > 0)
4622 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4623
4624 save_flags(flags);
4625 cli();
4626 BRDENABLE(portp->brdnr, portp->pagenr);
4627 stl_sc26198setreg(portp, IMR, imr);
4628 BRDDISABLE(portp->brdnr);
4629 portp->imr = imr;
4630 if (tx > 0)
4631 set_bit(ASYI_TXBUSY, &portp->istate);
4632 restore_flags(flags);
4633 }
4634
4635 /*****************************************************************************/
4636
4637 /*
4638 * Disable all interrupts from this port.
4639 */
4640
4641 static void stl_sc26198disableintrs(stlport_t *portp)
4642 {
4643 unsigned long flags;
4644
4645 #ifdef DEBUG
4646 printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp);
4647 #endif
4648
4649 save_flags(flags);
4650 cli();
4651 BRDENABLE(portp->brdnr, portp->pagenr);
4652 portp->imr = 0;
4653 stl_sc26198setreg(portp, IMR, 0);
4654 BRDDISABLE(portp->brdnr);
4655 restore_flags(flags);
4656 }
4657
4658 /*****************************************************************************/
4659
4660 static void stl_sc26198sendbreak(stlport_t *portp, int len)
4661 {
4662 unsigned long flags;
4663
4664 #ifdef DEBUG
4665 printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len);
4666 #endif
4667
4668 save_flags(flags);
4669 cli();
4670 BRDENABLE(portp->brdnr, portp->pagenr);
4671 if (len == 1) {
4672 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4673 portp->stats.txbreaks++;
4674 } else {
4675 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4676 }
4677 BRDDISABLE(portp->brdnr);
4678 restore_flags(flags);
4679 }
4680
4681 /*****************************************************************************/
4682
4683 /*
4684 * Take flow control actions...
4685 */
4686
4687 static void stl_sc26198flowctrl(stlport_t *portp, int state)
4688 {
4689 struct tty_struct *tty;
4690 unsigned long flags;
4691 unsigned char mr0;
4692
4693 #ifdef DEBUG
4694 printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state);
4695 #endif
4696
4697 if (portp == (stlport_t *) NULL)
4698 return;
4699 tty = portp->tty;
4700 if (tty == (struct tty_struct *) NULL)
4701 return;
4702
4703 save_flags(flags);
4704 cli();
4705 BRDENABLE(portp->brdnr, portp->pagenr);
4706
4707 if (state) {
4708 if (tty->termios->c_iflag & IXOFF) {
4709 mr0 = stl_sc26198getreg(portp, MR0);
4710 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4711 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4712 mr0 |= MR0_SWFRX;
4713 portp->stats.rxxon++;
4714 stl_sc26198wait(portp);
4715 stl_sc26198setreg(portp, MR0, mr0);
4716 }
4717 /*
4718 * Question: should we return RTS to what it was before? It may
4719 * have been set by an ioctl... Suppose not, since if you have
4720 * hardware flow control set then it is pretty silly to go and
4721 * set the RTS line by hand.
4722 */
4723 if (tty->termios->c_cflag & CRTSCTS) {
4724 stl_sc26198setreg(portp, MR1,
4725 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4726 stl_sc26198setreg(portp, IOPIOR,
4727 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4728 portp->stats.rxrtson++;
4729 }
4730 } else {
4731 if (tty->termios->c_iflag & IXOFF) {
4732 mr0 = stl_sc26198getreg(portp, MR0);
4733 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4734 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4735 mr0 &= ~MR0_SWFRX;
4736 portp->stats.rxxoff++;
4737 stl_sc26198wait(portp);
4738 stl_sc26198setreg(portp, MR0, mr0);
4739 }
4740 if (tty->termios->c_cflag & CRTSCTS) {
4741 stl_sc26198setreg(portp, MR1,
4742 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4743 stl_sc26198setreg(portp, IOPIOR,
4744 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4745 portp->stats.rxrtsoff++;
4746 }
4747 }
4748
4749 BRDDISABLE(portp->brdnr);
4750 restore_flags(flags);
4751 }
4752
4753 /*****************************************************************************/
4754
4755 /*
4756 * Send a flow control character.
4757 */
4758
4759 static void stl_sc26198sendflow(stlport_t *portp, int state)
4760 {
4761 struct tty_struct *tty;
4762 unsigned long flags;
4763 unsigned char mr0;
4764
4765 #ifdef DEBUG
4766 printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state);
4767 #endif
4768
4769 if (portp == (stlport_t *) NULL)
4770 return;
4771 tty = portp->tty;
4772 if (tty == (struct tty_struct *) NULL)
4773 return;
4774
4775 save_flags(flags);
4776 cli();
4777 BRDENABLE(portp->brdnr, portp->pagenr);
4778 if (state) {
4779 mr0 = stl_sc26198getreg(portp, MR0);
4780 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4781 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4782 mr0 |= MR0_SWFRX;
4783 portp->stats.rxxon++;
4784 stl_sc26198wait(portp);
4785 stl_sc26198setreg(portp, MR0, mr0);
4786 } else {
4787 mr0 = stl_sc26198getreg(portp, MR0);
4788 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4789 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4790 mr0 &= ~MR0_SWFRX;
4791 portp->stats.rxxoff++;
4792 stl_sc26198wait(portp);
4793 stl_sc26198setreg(portp, MR0, mr0);
4794 }
4795 BRDDISABLE(portp->brdnr);
4796 restore_flags(flags);
4797 }
4798
4799 /*****************************************************************************/
4800
4801 static void stl_sc26198flush(stlport_t *portp)
4802 {
4803 unsigned long flags;
4804
4805 #ifdef DEBUG
4806 printk("stl_sc26198flush(portp=%x)\n", (int) portp);
4807 #endif
4808
4809 if (portp == (stlport_t *) NULL)
4810 return;
4811
4812 save_flags(flags);
4813 cli();
4814 BRDENABLE(portp->brdnr, portp->pagenr);
4815 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4816 stl_sc26198setreg(portp, SCCR, portp->crenable);
4817 BRDDISABLE(portp->brdnr);
4818 portp->tx.tail = portp->tx.head;
4819 restore_flags(flags);
4820 }
4821
4822 /*****************************************************************************/
4823
4824 /*
4825 * Return the current state of data flow on this port. This is only
4826 * really interresting when determining if data has fully completed
4827 * transmission or not... The sc26198 interrupt scheme cannot
4828 * determine when all data has actually drained, so we need to
4829 * check the port statusy register to be sure.
4830 */
4831
4832 static int stl_sc26198datastate(stlport_t *portp)
4833 {
4834 unsigned long flags;
4835 unsigned char sr;
4836
4837 #ifdef DEBUG
4838 printk("stl_sc26198datastate(portp=%x)\n", (int) portp);
4839 #endif
4840
4841 if (portp == (stlport_t *) NULL)
4842 return(0);
4843 if (test_bit(ASYI_TXBUSY, &portp->istate))
4844 return(1);
4845
4846 save_flags(flags);
4847 cli();
4848 BRDENABLE(portp->brdnr, portp->pagenr);
4849 sr = stl_sc26198getreg(portp, SR);
4850 BRDDISABLE(portp->brdnr);
4851 restore_flags(flags);
4852
4853 return((sr & SR_TXEMPTY) ? 0 : 1);
4854 }
4855
4856 /*****************************************************************************/
4857
4858 /*
4859 * Delay for a small amount of time, to give the sc26198 a chance
4860 * to process a command...
4861 */
4862
4863 static void stl_sc26198wait(stlport_t *portp)
4864 {
4865 int i;
4866
4867 #ifdef DEBUG
4868 printk("stl_sc26198wait(portp=%x)\n", (int) portp);
4869 #endif
4870
4871 if (portp == (stlport_t *) NULL)
4872 return;
4873
4874 for (i = 0; (i < 20); i++)
4875 stl_sc26198getglobreg(portp, TSTR);
4876 }
4877
4878 /*****************************************************************************/
4879
4880 /*
4881 * If we are TX flow controlled and in IXANY mode then we may
4882 * need to unflow control here. We gotta do this because of the
4883 * automatic flow control modes of the sc26198.
4884 */
4885
4886 static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty)
4887 {
4888 unsigned char mr0;
4889
4890 mr0 = stl_sc26198getreg(portp, MR0);
4891 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4892 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4893 stl_sc26198wait(portp);
4894 stl_sc26198setreg(portp, MR0, mr0);
4895 clear_bit(ASYI_TXFLOWED, &portp->istate);
4896 }
4897
4898 /*****************************************************************************/
4899
4900 /*
4901 * Interrupt service routine for sc26198 panels.
4902 */
4903
4904 static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase)
4905 {
4906 stlport_t *portp;
4907 unsigned int iack;
4908
4909 /*
4910 * Work around bug in sc26198 chip... Cannot have A6 address
4911 * line of UART high, else iack will be returned as 0.
4912 */
4913 outb(0, (iobase + 1));
4914
4915 iack = inb(iobase + XP_IACK);
4916 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4917
4918 if (iack & IVR_RXDATA)
4919 stl_sc26198rxisr(portp, iack);
4920 else if (iack & IVR_TXDATA)
4921 stl_sc26198txisr(portp);
4922 else
4923 stl_sc26198otherisr(portp, iack);
4924 }
4925
4926 /*****************************************************************************/
4927
4928 /*
4929 * Transmit interrupt handler. This has gotta be fast! Handling TX
4930 * chars is pretty simple, stuff as many as possible from the TX buffer
4931 * into the sc26198 FIFO.
4932 * In practice it is possible that interrupts are enabled but that the
4933 * port has been hung up. Need to handle not having any TX buffer here,
4934 * this is done by using the side effect that head and tail will also
4935 * be NULL if the buffer has been freed.
4936 */
4937
4938 static void stl_sc26198txisr(stlport_t *portp)
4939 {
4940 unsigned int ioaddr;
4941 unsigned char mr0;
4942 int len, stlen;
4943 char *head, *tail;
4944
4945 #ifdef DEBUG
4946 printk("stl_sc26198txisr(portp=%x)\n", (int) portp);
4947 #endif
4948
4949 ioaddr = portp->ioaddr;
4950 head = portp->tx.head;
4951 tail = portp->tx.tail;
4952 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4953 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4954 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4955 set_bit(ASYI_TXLOW, &portp->istate);
4956 schedule_work(&portp->tqueue);
4957 }
4958
4959 if (len == 0) {
4960 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4961 mr0 = inb(ioaddr + XP_DATA);
4962 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4963 portp->imr &= ~IR_TXRDY;
4964 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4965 outb(portp->imr, (ioaddr + XP_DATA));
4966 clear_bit(ASYI_TXBUSY, &portp->istate);
4967 } else {
4968 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4969 outb(mr0, (ioaddr + XP_DATA));
4970 }
4971 } else {
4972 len = MIN(len, SC26198_TXFIFOSIZE);
4973 portp->stats.txtotal += len;
4974 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4975 outb(GTXFIFO, (ioaddr + XP_ADDR));
4976 outsb((ioaddr + XP_DATA), tail, stlen);
4977 len -= stlen;
4978 tail += stlen;
4979 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4980 tail = portp->tx.buf;
4981 if (len > 0) {
4982 outsb((ioaddr + XP_DATA), tail, len);
4983 tail += len;
4984 }
4985 portp->tx.tail = tail;
4986 }
4987 }
4988
4989 /*****************************************************************************/
4990
4991 /*
4992 * Receive character interrupt handler. Determine if we have good chars
4993 * or bad chars and then process appropriately. Good chars are easy
4994 * just shove the lot into the RX buffer and set all status byte to 0.
4995 * If a bad RX char then process as required. This routine needs to be
4996 * fast! In practice it is possible that we get an interrupt on a port
4997 * that is closed. This can happen on hangups - since they completely
4998 * shutdown a port not in user context. Need to handle this case.
4999 */
5000
5001 static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack)
5002 {
5003 struct tty_struct *tty;
5004 unsigned int len, buflen, ioaddr;
5005
5006 #ifdef DEBUG
5007 printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack);
5008 #endif
5009
5010 tty = portp->tty;
5011 ioaddr = portp->ioaddr;
5012 outb(GIBCR, (ioaddr + XP_ADDR));
5013 len = inb(ioaddr + XP_DATA) + 1;
5014
5015 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
5016 if ((tty == (struct tty_struct *) NULL) ||
5017 (tty->flip.char_buf_ptr == (char *) NULL) ||
5018 ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) {
5019 len = MIN(len, sizeof(stl_unwanted));
5020 outb(GRXFIFO, (ioaddr + XP_ADDR));
5021 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
5022 portp->stats.rxlost += len;
5023 portp->stats.rxtotal += len;
5024 } else {
5025 len = MIN(len, buflen);
5026 if (len > 0) {
5027 outb(GRXFIFO, (ioaddr + XP_ADDR));
5028 insb((ioaddr + XP_DATA), tty->flip.char_buf_ptr, len);
5029 memset(tty->flip.flag_buf_ptr, 0, len);
5030 tty->flip.flag_buf_ptr += len;
5031 tty->flip.char_buf_ptr += len;
5032 tty->flip.count += len;
5033 tty_schedule_flip(tty);
5034 portp->stats.rxtotal += len;
5035 }
5036 }
5037 } else {
5038 stl_sc26198rxbadchars(portp);
5039 }
5040
5041 /*
5042 * If we are TX flow controlled and in IXANY mode then we may need
5043 * to unflow control here. We gotta do this because of the automatic
5044 * flow control modes of the sc26198.
5045 */
5046 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
5047 if ((tty != (struct tty_struct *) NULL) &&
5048 (tty->termios != (struct termios *) NULL) &&
5049 (tty->termios->c_iflag & IXANY)) {
5050 stl_sc26198txunflow(portp, tty);
5051 }
5052 }
5053 }
5054
5055 /*****************************************************************************/
5056
5057 /*
5058 * Process an RX bad character.
5059 */
5060
5061 static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch)
5062 {
5063 struct tty_struct *tty;
5064 unsigned int ioaddr;
5065
5066 tty = portp->tty;
5067 ioaddr = portp->ioaddr;
5068
5069 if (status & SR_RXPARITY)
5070 portp->stats.rxparity++;
5071 if (status & SR_RXFRAMING)
5072 portp->stats.rxframing++;
5073 if (status & SR_RXOVERRUN)
5074 portp->stats.rxoverrun++;
5075 if (status & SR_RXBREAK)
5076 portp->stats.rxbreaks++;
5077
5078 if ((tty != (struct tty_struct *) NULL) &&
5079 ((portp->rxignoremsk & status) == 0)) {
5080 if (portp->rxmarkmsk & status) {
5081 if (status & SR_RXBREAK) {
5082 status = TTY_BREAK;
5083 if (portp->flags & ASYNC_SAK) {
5084 do_SAK(tty);
5085 BRDENABLE(portp->brdnr, portp->pagenr);
5086 }
5087 } else if (status & SR_RXPARITY) {
5088 status = TTY_PARITY;
5089 } else if (status & SR_RXFRAMING) {
5090 status = TTY_FRAME;
5091 } else if(status & SR_RXOVERRUN) {
5092 status = TTY_OVERRUN;
5093 } else {
5094 status = 0;
5095 }
5096 } else {
5097 status = 0;
5098 }
5099
5100 if (tty->flip.char_buf_ptr != (char *) NULL) {
5101 if (tty->flip.count < TTY_FLIPBUF_SIZE) {
5102 *tty->flip.flag_buf_ptr++ = status;
5103 *tty->flip.char_buf_ptr++ = ch;
5104 tty->flip.count++;
5105 }
5106 tty_schedule_flip(tty);
5107 }
5108
5109 if (status == 0)
5110 portp->stats.rxtotal++;
5111 }
5112 }
5113
5114 /*****************************************************************************/
5115
5116 /*
5117 * Process all characters in the RX FIFO of the UART. Check all char
5118 * status bytes as well, and process as required. We need to check
5119 * all bytes in the FIFO, in case some more enter the FIFO while we
5120 * are here. To get the exact character error type we need to switch
5121 * into CHAR error mode (that is why we need to make sure we empty
5122 * the FIFO).
5123 */
5124
5125 static void stl_sc26198rxbadchars(stlport_t *portp)
5126 {
5127 unsigned char status, mr1;
5128 char ch;
5129
5130 /*
5131 * To get the precise error type for each character we must switch
5132 * back into CHAR error mode.
5133 */
5134 mr1 = stl_sc26198getreg(portp, MR1);
5135 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
5136
5137 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
5138 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
5139 ch = stl_sc26198getreg(portp, RXFIFO);
5140 stl_sc26198rxbadch(portp, status, ch);
5141 }
5142
5143 /*
5144 * To get correct interrupt class we must switch back into BLOCK
5145 * error mode.
5146 */
5147 stl_sc26198setreg(portp, MR1, mr1);
5148 }
5149
5150 /*****************************************************************************/
5151
5152 /*
5153 * Other interrupt handler. This includes modem signals, flow
5154 * control actions, etc. Most stuff is left to off-level interrupt
5155 * processing time.
5156 */
5157
5158 static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack)
5159 {
5160 unsigned char cir, ipr, xisr;
5161
5162 #ifdef DEBUG
5163 printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack);
5164 #endif
5165
5166 cir = stl_sc26198getglobreg(portp, CIR);
5167
5168 switch (cir & CIR_SUBTYPEMASK) {
5169 case CIR_SUBCOS:
5170 ipr = stl_sc26198getreg(portp, IPR);
5171 if (ipr & IPR_DCDCHANGE) {
5172 set_bit(ASYI_DCDCHANGE, &portp->istate);
5173 schedule_work(&portp->tqueue);
5174 portp->stats.modem++;
5175 }
5176 break;
5177 case CIR_SUBXONXOFF:
5178 xisr = stl_sc26198getreg(portp, XISR);
5179 if (xisr & XISR_RXXONGOT) {
5180 set_bit(ASYI_TXFLOWED, &portp->istate);
5181 portp->stats.txxoff++;
5182 }
5183 if (xisr & XISR_RXXOFFGOT) {
5184 clear_bit(ASYI_TXFLOWED, &portp->istate);
5185 portp->stats.txxon++;
5186 }
5187 break;
5188 case CIR_SUBBREAK:
5189 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
5190 stl_sc26198rxbadchars(portp);
5191 break;
5192 default:
5193 break;
5194 }
5195 }
5196
5197 /*****************************************************************************/
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree