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x86: PAT avoid aliasing in /dev/mem read/write
[linux-2.6/mini2440.git] / drivers / char / stallion.c
blob874aaa08e956d8ae8143308b9582317076dfd371
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/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
44 #include <linux/ctype.h>
45
46 #include <asm/io.h>
47 #include <asm/uaccess.h>
48
49 #include <linux/pci.h>
50
51 /*****************************************************************************/
52
53 /*
54 * Define different board types. Use the standard Stallion "assigned"
55 * board numbers. Boards supported in this driver are abbreviated as
56 * EIO = EasyIO and ECH = EasyConnection 8/32.
57 */
58 #define BRD_EASYIO 20
59 #define BRD_ECH 21
60 #define BRD_ECHMC 22
61 #define BRD_ECHPCI 26
62 #define BRD_ECH64PCI 27
63 #define BRD_EASYIOPCI 28
64
65 struct stlconf {
66 unsigned int brdtype;
67 int ioaddr1;
68 int ioaddr2;
69 unsigned long memaddr;
70 int irq;
71 int irqtype;
72 };
73
74 static unsigned int stl_nrbrds;
75
76 /*****************************************************************************/
77
78 /*
79 * Define some important driver characteristics. Device major numbers
80 * allocated as per Linux Device Registry.
81 */
82 #ifndef STL_SIOMEMMAJOR
83 #define STL_SIOMEMMAJOR 28
84 #endif
85 #ifndef STL_SERIALMAJOR
86 #define STL_SERIALMAJOR 24
87 #endif
88 #ifndef STL_CALLOUTMAJOR
89 #define STL_CALLOUTMAJOR 25
90 #endif
91
92 /*
93 * Set the TX buffer size. Bigger is better, but we don't want
94 * to chew too much memory with buffers!
95 */
96 #define STL_TXBUFLOW 512
97 #define STL_TXBUFSIZE 4096
98
99 /*****************************************************************************/
100
101 /*
102 * Define our local driver identity first. Set up stuff to deal with
103 * all the local structures required by a serial tty driver.
104 */
105 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
106 static char *stl_drvname = "stallion";
107 static char *stl_drvversion = "5.6.0";
108
109 static struct tty_driver *stl_serial;
110
111 /*
112 * Define a local default termios struct. All ports will be created
113 * with this termios initially. Basically all it defines is a raw port
114 * at 9600, 8 data bits, 1 stop bit.
115 */
116 static struct ktermios stl_deftermios = {
117 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
118 .c_cc = INIT_C_CC,
119 .c_ispeed = 9600,
120 .c_ospeed = 9600,
121 };
122
123 /*
124 * Define global place to put buffer overflow characters.
125 */
126 static char stl_unwanted[SC26198_RXFIFOSIZE];
127
128 /*****************************************************************************/
129
130 static DEFINE_MUTEX(stl_brdslock);
131 static struct stlbrd *stl_brds[STL_MAXBRDS];
132
133 /*
134 * Per board state flags. Used with the state field of the board struct.
135 * Not really much here!
136 */
137 #define BRD_FOUND 0x1
138 #define STL_PROBED 0x2
139
140
141 /*
142 * Define the port structure istate flags. These set of flags are
143 * modified at interrupt time - so setting and reseting them needs
144 * to be atomic. Use the bit clear/setting routines for this.
145 */
146 #define ASYI_TXBUSY 1
147 #define ASYI_TXLOW 2
148 #define ASYI_TXFLOWED 3
149
150 /*
151 * Define an array of board names as printable strings. Handy for
152 * referencing boards when printing trace and stuff.
153 */
154 static char *stl_brdnames[] = {
155 NULL,
156 NULL,
157 NULL,
158 NULL,
159 NULL,
160 NULL,
161 NULL,
162 NULL,
163 NULL,
164 NULL,
165 NULL,
166 NULL,
167 NULL,
168 NULL,
169 NULL,
170 NULL,
171 NULL,
172 NULL,
173 NULL,
174 NULL,
175 "EasyIO",
176 "EC8/32-AT",
177 "EC8/32-MC",
178 NULL,
179 NULL,
180 NULL,
181 "EC8/32-PCI",
182 "EC8/64-PCI",
183 "EasyIO-PCI",
184 };
185
186 /*****************************************************************************/
187
188 /*
189 * Define some string labels for arguments passed from the module
190 * load line. These allow for easy board definitions, and easy
191 * modification of the io, memory and irq resoucres.
192 */
193 static unsigned int stl_nargs;
194 static char *board0[4];
195 static char *board1[4];
196 static char *board2[4];
197 static char *board3[4];
198
199 static char **stl_brdsp[] = {
200 (char **) &board0,
201 (char **) &board1,
202 (char **) &board2,
203 (char **) &board3
204 };
205
206 /*
207 * Define a set of common board names, and types. This is used to
208 * parse any module arguments.
209 */
210
211 static struct {
212 char *name;
213 int type;
214 } stl_brdstr[] = {
215 { "easyio", BRD_EASYIO },
216 { "eio", BRD_EASYIO },
217 { "20", BRD_EASYIO },
218 { "ec8/32", BRD_ECH },
219 { "ec8/32-at", BRD_ECH },
220 { "ec8/32-isa", BRD_ECH },
221 { "ech", BRD_ECH },
222 { "echat", BRD_ECH },
223 { "21", BRD_ECH },
224 { "ec8/32-mc", BRD_ECHMC },
225 { "ec8/32-mca", BRD_ECHMC },
226 { "echmc", BRD_ECHMC },
227 { "echmca", BRD_ECHMC },
228 { "22", BRD_ECHMC },
229 { "ec8/32-pc", BRD_ECHPCI },
230 { "ec8/32-pci", BRD_ECHPCI },
231 { "26", BRD_ECHPCI },
232 { "ec8/64-pc", BRD_ECH64PCI },
233 { "ec8/64-pci", BRD_ECH64PCI },
234 { "ech-pci", BRD_ECH64PCI },
235 { "echpci", BRD_ECH64PCI },
236 { "echpc", BRD_ECH64PCI },
237 { "27", BRD_ECH64PCI },
238 { "easyio-pc", BRD_EASYIOPCI },
239 { "easyio-pci", BRD_EASYIOPCI },
240 { "eio-pci", BRD_EASYIOPCI },
241 { "eiopci", BRD_EASYIOPCI },
242 { "28", BRD_EASYIOPCI },
243 };
244
245 /*
246 * Define the module agruments.
247 */
248
249 module_param_array(board0, charp, &stl_nargs, 0);
250 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
251 module_param_array(board1, charp, &stl_nargs, 0);
252 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
253 module_param_array(board2, charp, &stl_nargs, 0);
254 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
255 module_param_array(board3, charp, &stl_nargs, 0);
256 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
257
258 /*****************************************************************************/
259
260 /*
261 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
262 * to the directly accessible io ports of these boards (not the uarts -
263 * they are in cd1400.h and sc26198.h).
264 */
265 #define EIO_8PORTRS 0x04
266 #define EIO_4PORTRS 0x05
267 #define EIO_8PORTDI 0x00
268 #define EIO_8PORTM 0x06
269 #define EIO_MK3 0x03
270 #define EIO_IDBITMASK 0x07
271
272 #define EIO_BRDMASK 0xf0
273 #define ID_BRD4 0x10
274 #define ID_BRD8 0x20
275 #define ID_BRD16 0x30
276
277 #define EIO_INTRPEND 0x08
278 #define EIO_INTEDGE 0x00
279 #define EIO_INTLEVEL 0x08
280 #define EIO_0WS 0x10
281
282 #define ECH_ID 0xa0
283 #define ECH_IDBITMASK 0xe0
284 #define ECH_BRDENABLE 0x08
285 #define ECH_BRDDISABLE 0x00
286 #define ECH_INTENABLE 0x01
287 #define ECH_INTDISABLE 0x00
288 #define ECH_INTLEVEL 0x02
289 #define ECH_INTEDGE 0x00
290 #define ECH_INTRPEND 0x01
291 #define ECH_BRDRESET 0x01
292
293 #define ECHMC_INTENABLE 0x01
294 #define ECHMC_BRDRESET 0x02
295
296 #define ECH_PNLSTATUS 2
297 #define ECH_PNL16PORT 0x20
298 #define ECH_PNLIDMASK 0x07
299 #define ECH_PNLXPID 0x40
300 #define ECH_PNLINTRPEND 0x80
301
302 #define ECH_ADDR2MASK 0x1e0
303
304 /*
305 * Define the vector mapping bits for the programmable interrupt board
306 * hardware. These bits encode the interrupt for the board to use - it
307 * is software selectable (except the EIO-8M).
308 */
309 static unsigned char stl_vecmap[] = {
310 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
311 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
312 };
313
314 /*
315 * Lock ordering is that you may not take stallion_lock holding
316 * brd_lock.
317 */
318
319 static spinlock_t brd_lock; /* Guard the board mapping */
320 static spinlock_t stallion_lock; /* Guard the tty driver */
321
322 /*
323 * Set up enable and disable macros for the ECH boards. They require
324 * the secondary io address space to be activated and deactivated.
325 * This way all ECH boards can share their secondary io region.
326 * If this is an ECH-PCI board then also need to set the page pointer
327 * to point to the correct page.
328 */
329 #define BRDENABLE(brdnr,pagenr) \
330 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
331 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
332 stl_brds[(brdnr)]->ioctrl); \
333 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
334 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
335
336 #define BRDDISABLE(brdnr) \
337 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
338 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
339 stl_brds[(brdnr)]->ioctrl);
340
341 #define STL_CD1400MAXBAUD 230400
342 #define STL_SC26198MAXBAUD 460800
343
344 #define STL_BAUDBASE 115200
345 #define STL_CLOSEDELAY (5 * HZ / 10)
346
347 /*****************************************************************************/
348
349 /*
350 * Define the Stallion PCI vendor and device IDs.
351 */
352 #ifndef PCI_VENDOR_ID_STALLION
353 #define PCI_VENDOR_ID_STALLION 0x124d
354 #endif
355 #ifndef PCI_DEVICE_ID_ECHPCI832
356 #define PCI_DEVICE_ID_ECHPCI832 0x0000
357 #endif
358 #ifndef PCI_DEVICE_ID_ECHPCI864
359 #define PCI_DEVICE_ID_ECHPCI864 0x0002
360 #endif
361 #ifndef PCI_DEVICE_ID_EIOPCI
362 #define PCI_DEVICE_ID_EIOPCI 0x0003
363 #endif
364
365 /*
366 * Define structure to hold all Stallion PCI boards.
367 */
368
369 static struct pci_device_id stl_pcibrds[] = {
370 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
371 .driver_data = BRD_ECH64PCI },
372 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
373 .driver_data = BRD_EASYIOPCI },
374 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
375 .driver_data = BRD_ECHPCI },
376 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
377 .driver_data = BRD_ECHPCI },
378 { }
379 };
380 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
381
382 /*****************************************************************************/
383
384 /*
385 * Define macros to extract a brd/port number from a minor number.
386 */
387 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
388 #define MINOR2PORT(min) ((min) & 0x3f)
389
390 /*
391 * Define a baud rate table that converts termios baud rate selector
392 * into the actual baud rate value. All baud rate calculations are
393 * based on the actual baud rate required.
394 */
395 static unsigned int stl_baudrates[] = {
396 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
397 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
398 };
399
400 /*****************************************************************************/
401
402 /*
403 * Declare all those functions in this driver!
404 */
405
406 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
407 static int stl_brdinit(struct stlbrd *brdp);
408 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
409 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
410 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
411
412 /*
413 * CD1400 uart specific handling functions.
414 */
415 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
416 static int stl_cd1400getreg(struct stlport *portp, int regnr);
417 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
418 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
419 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
420 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
421 static int stl_cd1400getsignals(struct stlport *portp);
422 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
423 static void stl_cd1400ccrwait(struct stlport *portp);
424 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
425 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
426 static void stl_cd1400disableintrs(struct stlport *portp);
427 static void stl_cd1400sendbreak(struct stlport *portp, int len);
428 static void stl_cd1400flowctrl(struct stlport *portp, int state);
429 static void stl_cd1400sendflow(struct stlport *portp, int state);
430 static void stl_cd1400flush(struct stlport *portp);
431 static int stl_cd1400datastate(struct stlport *portp);
432 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
433 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
434 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
435 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
436 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
437
438 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
439
440 /*
441 * SC26198 uart specific handling functions.
442 */
443 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
444 static int stl_sc26198getreg(struct stlport *portp, int regnr);
445 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
446 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
447 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
448 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
449 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
450 static int stl_sc26198getsignals(struct stlport *portp);
451 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
452 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
453 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
454 static void stl_sc26198disableintrs(struct stlport *portp);
455 static void stl_sc26198sendbreak(struct stlport *portp, int len);
456 static void stl_sc26198flowctrl(struct stlport *portp, int state);
457 static void stl_sc26198sendflow(struct stlport *portp, int state);
458 static void stl_sc26198flush(struct stlport *portp);
459 static int stl_sc26198datastate(struct stlport *portp);
460 static void stl_sc26198wait(struct stlport *portp);
461 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
462 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
463 static void stl_sc26198txisr(struct stlport *port);
464 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
465 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
466 static void stl_sc26198rxbadchars(struct stlport *portp);
467 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
468
469 /*****************************************************************************/
470
471 /*
472 * Generic UART support structure.
473 */
474 typedef struct uart {
475 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
476 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
477 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
478 int (*getsignals)(struct stlport *portp);
479 void (*setsignals)(struct stlport *portp, int dtr, int rts);
480 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
481 void (*startrxtx)(struct stlport *portp, int rx, int tx);
482 void (*disableintrs)(struct stlport *portp);
483 void (*sendbreak)(struct stlport *portp, int len);
484 void (*flowctrl)(struct stlport *portp, int state);
485 void (*sendflow)(struct stlport *portp, int state);
486 void (*flush)(struct stlport *portp);
487 int (*datastate)(struct stlport *portp);
488 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
489 } uart_t;
490
491 /*
492 * Define some macros to make calling these functions nice and clean.
493 */
494 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
495 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
496 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
497 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
498 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
499 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
500 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
501 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
502 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
503 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
504 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
505 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
506 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
507
508 /*****************************************************************************/
509
510 /*
511 * CD1400 UART specific data initialization.
512 */
513 static uart_t stl_cd1400uart = {
514 stl_cd1400panelinit,
515 stl_cd1400portinit,
516 stl_cd1400setport,
517 stl_cd1400getsignals,
518 stl_cd1400setsignals,
519 stl_cd1400enablerxtx,
520 stl_cd1400startrxtx,
521 stl_cd1400disableintrs,
522 stl_cd1400sendbreak,
523 stl_cd1400flowctrl,
524 stl_cd1400sendflow,
525 stl_cd1400flush,
526 stl_cd1400datastate,
527 stl_cd1400eiointr
528 };
529
530 /*
531 * Define the offsets within the register bank of a cd1400 based panel.
532 * These io address offsets are common to the EasyIO board as well.
533 */
534 #define EREG_ADDR 0
535 #define EREG_DATA 4
536 #define EREG_RXACK 5
537 #define EREG_TXACK 6
538 #define EREG_MDACK 7
539
540 #define EREG_BANKSIZE 8
541
542 #define CD1400_CLK 25000000
543 #define CD1400_CLK8M 20000000
544
545 /*
546 * Define the cd1400 baud rate clocks. These are used when calculating
547 * what clock and divisor to use for the required baud rate. Also
548 * define the maximum baud rate allowed, and the default base baud.
549 */
550 static int stl_cd1400clkdivs[] = {
551 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
552 };
553
554 /*****************************************************************************/
555
556 /*
557 * SC26198 UART specific data initization.
558 */
559 static uart_t stl_sc26198uart = {
560 stl_sc26198panelinit,
561 stl_sc26198portinit,
562 stl_sc26198setport,
563 stl_sc26198getsignals,
564 stl_sc26198setsignals,
565 stl_sc26198enablerxtx,
566 stl_sc26198startrxtx,
567 stl_sc26198disableintrs,
568 stl_sc26198sendbreak,
569 stl_sc26198flowctrl,
570 stl_sc26198sendflow,
571 stl_sc26198flush,
572 stl_sc26198datastate,
573 stl_sc26198intr
574 };
575
576 /*
577 * Define the offsets within the register bank of a sc26198 based panel.
578 */
579 #define XP_DATA 0
580 #define XP_ADDR 1
581 #define XP_MODID 2
582 #define XP_STATUS 2
583 #define XP_IACK 3
584
585 #define XP_BANKSIZE 4
586
587 /*
588 * Define the sc26198 baud rate table. Offsets within the table
589 * represent the actual baud rate selector of sc26198 registers.
590 */
591 static unsigned int sc26198_baudtable[] = {
592 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
593 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
594 230400, 460800, 921600
595 };
596
597 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
598
599 /*****************************************************************************/
600
601 /*
602 * Define the driver info for a user level control device. Used mainly
603 * to get at port stats - only not using the port device itself.
604 */
605 static const struct file_operations stl_fsiomem = {
606 .owner = THIS_MODULE,
607 .ioctl = stl_memioctl,
608 };
609
610 static struct class *stallion_class;
611
612 static void stl_cd_change(struct stlport *portp)
613 {
614 unsigned int oldsigs = portp->sigs;
615
616 if (!portp->tty)
617 return;
618
619 portp->sigs = stl_getsignals(portp);
620
621 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
622 wake_up_interruptible(&portp->open_wait);
623
624 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
625 if (portp->flags & ASYNC_CHECK_CD)
626 tty_hangup(portp->tty);
627 }
628
629 /*
630 * Check for any arguments passed in on the module load command line.
631 */
632
633 /*****************************************************************************/
634
635 /*
636 * Parse the supplied argument string, into the board conf struct.
637 */
638
639 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
640 {
641 char *sp;
642 unsigned int i;
643
644 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
645
646 if ((argp[0] == NULL) || (*argp[0] == 0))
647 return 0;
648
649 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
650 *sp = tolower(*sp);
651
652 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
653 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
654 break;
655
656 if (i == ARRAY_SIZE(stl_brdstr)) {
657 printk("STALLION: unknown board name, %s?\n", argp[0]);
658 return 0;
659 }
660
661 confp->brdtype = stl_brdstr[i].type;
662
663 i = 1;
664 if ((argp[i] != NULL) && (*argp[i] != 0))
665 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
666 i++;
667 if (confp->brdtype == BRD_ECH) {
668 if ((argp[i] != NULL) && (*argp[i] != 0))
669 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
670 i++;
671 }
672 if ((argp[i] != NULL) && (*argp[i] != 0))
673 confp->irq = simple_strtoul(argp[i], NULL, 0);
674 return 1;
675 }
676
677 /*****************************************************************************/
678
679 /*
680 * Allocate a new board structure. Fill out the basic info in it.
681 */
682
683 static struct stlbrd *stl_allocbrd(void)
684 {
685 struct stlbrd *brdp;
686
687 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
688 if (!brdp) {
689 printk("STALLION: failed to allocate memory (size=%Zd)\n",
690 sizeof(struct stlbrd));
691 return NULL;
692 }
693
694 brdp->magic = STL_BOARDMAGIC;
695 return brdp;
696 }
697
698 /*****************************************************************************/
699
700 static int stl_open(struct tty_struct *tty, struct file *filp)
701 {
702 struct stlport *portp;
703 struct stlbrd *brdp;
704 unsigned int minordev, brdnr, panelnr;
705 int portnr, rc;
706
707 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
708
709 minordev = tty->index;
710 brdnr = MINOR2BRD(minordev);
711 if (brdnr >= stl_nrbrds)
712 return -ENODEV;
713 brdp = stl_brds[brdnr];
714 if (brdp == NULL)
715 return -ENODEV;
716 minordev = MINOR2PORT(minordev);
717 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
718 if (brdp->panels[panelnr] == NULL)
719 break;
720 if (minordev < brdp->panels[panelnr]->nrports) {
721 portnr = minordev;
722 break;
723 }
724 minordev -= brdp->panels[panelnr]->nrports;
725 }
726 if (portnr < 0)
727 return -ENODEV;
728
729 portp = brdp->panels[panelnr]->ports[portnr];
730 if (portp == NULL)
731 return -ENODEV;
732
733 /*
734 * On the first open of the device setup the port hardware, and
735 * initialize the per port data structure.
736 */
737 portp->tty = tty;
738 tty->driver_data = portp;
739 portp->refcount++;
740
741 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
742 if (!portp->tx.buf) {
743 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
744 if (!portp->tx.buf)
745 return -ENOMEM;
746 portp->tx.head = portp->tx.buf;
747 portp->tx.tail = portp->tx.buf;
748 }
749 stl_setport(portp, tty->termios);
750 portp->sigs = stl_getsignals(portp);
751 stl_setsignals(portp, 1, 1);
752 stl_enablerxtx(portp, 1, 1);
753 stl_startrxtx(portp, 1, 0);
754 clear_bit(TTY_IO_ERROR, &tty->flags);
755 portp->flags |= ASYNC_INITIALIZED;
756 }
757
758 /*
759 * Check if this port is in the middle of closing. If so then wait
760 * until it is closed then return error status, based on flag settings.
761 * The sleep here does not need interrupt protection since the wakeup
762 * for it is done with the same context.
763 */
764 if (portp->flags & ASYNC_CLOSING) {
765 interruptible_sleep_on(&portp->close_wait);
766 if (portp->flags & ASYNC_HUP_NOTIFY)
767 return -EAGAIN;
768 return -ERESTARTSYS;
769 }
770
771 /*
772 * Based on type of open being done check if it can overlap with any
773 * previous opens still in effect. If we are a normal serial device
774 * then also we might have to wait for carrier.
775 */
776 if (!(filp->f_flags & O_NONBLOCK))
777 if ((rc = stl_waitcarrier(portp, filp)) != 0)
778 return rc;
779
780 portp->flags |= ASYNC_NORMAL_ACTIVE;
781
782 return 0;
783 }
784
785 /*****************************************************************************/
786
787 /*
788 * Possibly need to wait for carrier (DCD signal) to come high. Say
789 * maybe because if we are clocal then we don't need to wait...
790 */
791
792 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
793 {
794 unsigned long flags;
795 int rc, doclocal;
796
797 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
798
799 rc = 0;
800 doclocal = 0;
801
802 spin_lock_irqsave(&stallion_lock, flags);
803
804 if (portp->tty->termios->c_cflag & CLOCAL)
805 doclocal++;
806
807 portp->openwaitcnt++;
808 if (! tty_hung_up_p(filp))
809 portp->refcount--;
810
811 for (;;) {
812 /* Takes brd_lock internally */
813 stl_setsignals(portp, 1, 1);
814 if (tty_hung_up_p(filp) ||
815 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
816 if (portp->flags & ASYNC_HUP_NOTIFY)
817 rc = -EBUSY;
818 else
819 rc = -ERESTARTSYS;
820 break;
821 }
822 if (((portp->flags & ASYNC_CLOSING) == 0) &&
823 (doclocal || (portp->sigs & TIOCM_CD)))
824 break;
825 if (signal_pending(current)) {
826 rc = -ERESTARTSYS;
827 break;
828 }
829 /* FIXME */
830 interruptible_sleep_on(&portp->open_wait);
831 }
832
833 if (! tty_hung_up_p(filp))
834 portp->refcount++;
835 portp->openwaitcnt--;
836 spin_unlock_irqrestore(&stallion_lock, flags);
837
838 return rc;
839 }
840
841 /*****************************************************************************/
842
843 static void stl_flushbuffer(struct tty_struct *tty)
844 {
845 struct stlport *portp;
846
847 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
848
849 if (tty == NULL)
850 return;
851 portp = tty->driver_data;
852 if (portp == NULL)
853 return;
854
855 stl_flush(portp);
856 tty_wakeup(tty);
857 }
858
859 /*****************************************************************************/
860
861 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
862 {
863 struct stlport *portp;
864 unsigned long tend;
865
866 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
867
868 if (tty == NULL)
869 return;
870 portp = tty->driver_data;
871 if (portp == NULL)
872 return;
873
874 if (timeout == 0)
875 timeout = HZ;
876 tend = jiffies + timeout;
877
878 while (stl_datastate(portp)) {
879 if (signal_pending(current))
880 break;
881 msleep_interruptible(20);
882 if (time_after_eq(jiffies, tend))
883 break;
884 }
885 }
886
887 /*****************************************************************************/
888
889 static void stl_close(struct tty_struct *tty, struct file *filp)
890 {
891 struct stlport *portp;
892 unsigned long flags;
893
894 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
895
896 portp = tty->driver_data;
897 if (portp == NULL)
898 return;
899
900 spin_lock_irqsave(&stallion_lock, flags);
901 if (tty_hung_up_p(filp)) {
902 spin_unlock_irqrestore(&stallion_lock, flags);
903 return;
904 }
905 if ((tty->count == 1) && (portp->refcount != 1))
906 portp->refcount = 1;
907 if (portp->refcount-- > 1) {
908 spin_unlock_irqrestore(&stallion_lock, flags);
909 return;
910 }
911
912 portp->refcount = 0;
913 portp->flags |= ASYNC_CLOSING;
914
915 /*
916 * May want to wait for any data to drain before closing. The BUSY
917 * flag keeps track of whether we are still sending or not - it is
918 * very accurate for the cd1400, not quite so for the sc26198.
919 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
920 */
921 tty->closing = 1;
922
923 spin_unlock_irqrestore(&stallion_lock, flags);
924
925 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
926 tty_wait_until_sent(tty, portp->closing_wait);
927 stl_waituntilsent(tty, (HZ / 2));
928
929
930 spin_lock_irqsave(&stallion_lock, flags);
931 portp->flags &= ~ASYNC_INITIALIZED;
932 spin_unlock_irqrestore(&stallion_lock, flags);
933
934 stl_disableintrs(portp);
935 if (tty->termios->c_cflag & HUPCL)
936 stl_setsignals(portp, 0, 0);
937 stl_enablerxtx(portp, 0, 0);
938 stl_flushbuffer(tty);
939 portp->istate = 0;
940 if (portp->tx.buf != NULL) {
941 kfree(portp->tx.buf);
942 portp->tx.buf = NULL;
943 portp->tx.head = NULL;
944 portp->tx.tail = NULL;
945 }
946 set_bit(TTY_IO_ERROR, &tty->flags);
947 tty_ldisc_flush(tty);
948
949 tty->closing = 0;
950 portp->tty = NULL;
951
952 if (portp->openwaitcnt) {
953 if (portp->close_delay)
954 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
955 wake_up_interruptible(&portp->open_wait);
956 }
957
958 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
959 wake_up_interruptible(&portp->close_wait);
960 }
961
962 /*****************************************************************************/
963
964 /*
965 * Write routine. Take data and stuff it in to the TX ring queue.
966 * If transmit interrupts are not running then start them.
967 */
968
969 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
970 {
971 struct stlport *portp;
972 unsigned int len, stlen;
973 unsigned char *chbuf;
974 char *head, *tail;
975
976 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
977
978 portp = tty->driver_data;
979 if (portp == NULL)
980 return 0;
981 if (portp->tx.buf == NULL)
982 return 0;
983
984 /*
985 * If copying direct from user space we must cater for page faults,
986 * causing us to "sleep" here for a while. To handle this copy in all
987 * the data we need now, into a local buffer. Then when we got it all
988 * copy it into the TX buffer.
989 */
990 chbuf = (unsigned char *) buf;
991
992 head = portp->tx.head;
993 tail = portp->tx.tail;
994 if (head >= tail) {
995 len = STL_TXBUFSIZE - (head - tail) - 1;
996 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
997 } else {
998 len = tail - head - 1;
999 stlen = len;
1000 }
1001
1002 len = min(len, (unsigned int)count);
1003 count = 0;
1004 while (len > 0) {
1005 stlen = min(len, stlen);
1006 memcpy(head, chbuf, stlen);
1007 len -= stlen;
1008 chbuf += stlen;
1009 count += stlen;
1010 head += stlen;
1011 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1012 head = portp->tx.buf;
1013 stlen = tail - head;
1014 }
1015 }
1016 portp->tx.head = head;
1017
1018 clear_bit(ASYI_TXLOW, &portp->istate);
1019 stl_startrxtx(portp, -1, 1);
1020
1021 return count;
1022 }
1023
1024 /*****************************************************************************/
1025
1026 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1027 {
1028 struct stlport *portp;
1029 unsigned int len;
1030 char *head, *tail;
1031
1032 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1033
1034 if (tty == NULL)
1035 return;
1036 portp = tty->driver_data;
1037 if (portp == NULL)
1038 return;
1039 if (portp->tx.buf == NULL)
1040 return;
1041
1042 head = portp->tx.head;
1043 tail = portp->tx.tail;
1044
1045 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1046 len--;
1047
1048 if (len > 0) {
1049 *head++ = ch;
1050 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1051 head = portp->tx.buf;
1052 }
1053 portp->tx.head = head;
1054 }
1055
1056 /*****************************************************************************/
1057
1058 /*
1059 * If there are any characters in the buffer then make sure that TX
1060 * interrupts are on and get'em out. Normally used after the putchar
1061 * routine has been called.
1062 */
1063
1064 static void stl_flushchars(struct tty_struct *tty)
1065 {
1066 struct stlport *portp;
1067
1068 pr_debug("stl_flushchars(tty=%p)\n", tty);
1069
1070 if (tty == NULL)
1071 return;
1072 portp = tty->driver_data;
1073 if (portp == NULL)
1074 return;
1075 if (portp->tx.buf == NULL)
1076 return;
1077
1078 stl_startrxtx(portp, -1, 1);
1079 }
1080
1081 /*****************************************************************************/
1082
1083 static int stl_writeroom(struct tty_struct *tty)
1084 {
1085 struct stlport *portp;
1086 char *head, *tail;
1087
1088 pr_debug("stl_writeroom(tty=%p)\n", tty);
1089
1090 if (tty == NULL)
1091 return 0;
1092 portp = tty->driver_data;
1093 if (portp == NULL)
1094 return 0;
1095 if (portp->tx.buf == NULL)
1096 return 0;
1097
1098 head = portp->tx.head;
1099 tail = portp->tx.tail;
1100 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1101 }
1102
1103 /*****************************************************************************/
1104
1105 /*
1106 * Return number of chars in the TX buffer. Normally we would just
1107 * calculate the number of chars in the buffer and return that, but if
1108 * the buffer is empty and TX interrupts are still on then we return
1109 * that the buffer still has 1 char in it. This way whoever called us
1110 * will not think that ALL chars have drained - since the UART still
1111 * must have some chars in it (we are busy after all).
1112 */
1113
1114 static int stl_charsinbuffer(struct tty_struct *tty)
1115 {
1116 struct stlport *portp;
1117 unsigned int size;
1118 char *head, *tail;
1119
1120 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1121
1122 if (tty == NULL)
1123 return 0;
1124 portp = tty->driver_data;
1125 if (portp == NULL)
1126 return 0;
1127 if (portp->tx.buf == NULL)
1128 return 0;
1129
1130 head = portp->tx.head;
1131 tail = portp->tx.tail;
1132 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1133 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1134 size = 1;
1135 return size;
1136 }
1137
1138 /*****************************************************************************/
1139
1140 /*
1141 * Generate the serial struct info.
1142 */
1143
1144 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1145 {
1146 struct serial_struct sio;
1147 struct stlbrd *brdp;
1148
1149 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1150
1151 memset(&sio, 0, sizeof(struct serial_struct));
1152 sio.line = portp->portnr;
1153 sio.port = portp->ioaddr;
1154 sio.flags = portp->flags;
1155 sio.baud_base = portp->baud_base;
1156 sio.close_delay = portp->close_delay;
1157 sio.closing_wait = portp->closing_wait;
1158 sio.custom_divisor = portp->custom_divisor;
1159 sio.hub6 = 0;
1160 if (portp->uartp == &stl_cd1400uart) {
1161 sio.type = PORT_CIRRUS;
1162 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1163 } else {
1164 sio.type = PORT_UNKNOWN;
1165 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1166 }
1167
1168 brdp = stl_brds[portp->brdnr];
1169 if (brdp != NULL)
1170 sio.irq = brdp->irq;
1171
1172 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1173 }
1174
1175 /*****************************************************************************/
1176
1177 /*
1178 * Set port according to the serial struct info.
1179 * At this point we do not do any auto-configure stuff, so we will
1180 * just quietly ignore any requests to change irq, etc.
1181 */
1182
1183 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1184 {
1185 struct serial_struct sio;
1186
1187 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1188
1189 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1190 return -EFAULT;
1191 if (!capable(CAP_SYS_ADMIN)) {
1192 if ((sio.baud_base != portp->baud_base) ||
1193 (sio.close_delay != portp->close_delay) ||
1194 ((sio.flags & ~ASYNC_USR_MASK) !=
1195 (portp->flags & ~ASYNC_USR_MASK)))
1196 return -EPERM;
1197 }
1198
1199 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1200 (sio.flags & ASYNC_USR_MASK);
1201 portp->baud_base = sio.baud_base;
1202 portp->close_delay = sio.close_delay;
1203 portp->closing_wait = sio.closing_wait;
1204 portp->custom_divisor = sio.custom_divisor;
1205 stl_setport(portp, portp->tty->termios);
1206 return 0;
1207 }
1208
1209 /*****************************************************************************/
1210
1211 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1212 {
1213 struct stlport *portp;
1214
1215 if (tty == NULL)
1216 return -ENODEV;
1217 portp = tty->driver_data;
1218 if (portp == NULL)
1219 return -ENODEV;
1220 if (tty->flags & (1 << TTY_IO_ERROR))
1221 return -EIO;
1222
1223 return stl_getsignals(portp);
1224 }
1225
1226 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1227 unsigned int set, unsigned int clear)
1228 {
1229 struct stlport *portp;
1230 int rts = -1, dtr = -1;
1231
1232 if (tty == NULL)
1233 return -ENODEV;
1234 portp = tty->driver_data;
1235 if (portp == NULL)
1236 return -ENODEV;
1237 if (tty->flags & (1 << TTY_IO_ERROR))
1238 return -EIO;
1239
1240 if (set & TIOCM_RTS)
1241 rts = 1;
1242 if (set & TIOCM_DTR)
1243 dtr = 1;
1244 if (clear & TIOCM_RTS)
1245 rts = 0;
1246 if (clear & TIOCM_DTR)
1247 dtr = 0;
1248
1249 stl_setsignals(portp, dtr, rts);
1250 return 0;
1251 }
1252
1253 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1254 {
1255 struct stlport *portp;
1256 unsigned int ival;
1257 int rc;
1258 void __user *argp = (void __user *)arg;
1259
1260 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1261 arg);
1262
1263 if (tty == NULL)
1264 return -ENODEV;
1265 portp = tty->driver_data;
1266 if (portp == NULL)
1267 return -ENODEV;
1268
1269 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1270 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1271 if (tty->flags & (1 << TTY_IO_ERROR))
1272 return -EIO;
1273
1274 rc = 0;
1275
1276 switch (cmd) {
1277 case TIOCGSOFTCAR:
1278 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1279 (unsigned __user *) argp);
1280 break;
1281 case TIOCSSOFTCAR:
1282 if (get_user(ival, (unsigned int __user *) arg))
1283 return -EFAULT;
1284 tty->termios->c_cflag =
1285 (tty->termios->c_cflag & ~CLOCAL) |
1286 (ival ? CLOCAL : 0);
1287 break;
1288 case TIOCGSERIAL:
1289 rc = stl_getserial(portp, argp);
1290 break;
1291 case TIOCSSERIAL:
1292 rc = stl_setserial(portp, argp);
1293 break;
1294 case COM_GETPORTSTATS:
1295 rc = stl_getportstats(portp, argp);
1296 break;
1297 case COM_CLRPORTSTATS:
1298 rc = stl_clrportstats(portp, argp);
1299 break;
1300 case TIOCSERCONFIG:
1301 case TIOCSERGWILD:
1302 case TIOCSERSWILD:
1303 case TIOCSERGETLSR:
1304 case TIOCSERGSTRUCT:
1305 case TIOCSERGETMULTI:
1306 case TIOCSERSETMULTI:
1307 default:
1308 rc = -ENOIOCTLCMD;
1309 break;
1310 }
1311
1312 return rc;
1313 }
1314
1315 /*****************************************************************************/
1316
1317 /*
1318 * Start the transmitter again. Just turn TX interrupts back on.
1319 */
1320
1321 static void stl_start(struct tty_struct *tty)
1322 {
1323 struct stlport *portp;
1324
1325 pr_debug("stl_start(tty=%p)\n", tty);
1326
1327 if (tty == NULL)
1328 return;
1329 portp = tty->driver_data;
1330 if (portp == NULL)
1331 return;
1332 stl_startrxtx(portp, -1, 1);
1333 }
1334
1335 /*****************************************************************************/
1336
1337 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1338 {
1339 struct stlport *portp;
1340 struct ktermios *tiosp;
1341
1342 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1343
1344 if (tty == NULL)
1345 return;
1346 portp = tty->driver_data;
1347 if (portp == NULL)
1348 return;
1349
1350 tiosp = tty->termios;
1351 if ((tiosp->c_cflag == old->c_cflag) &&
1352 (tiosp->c_iflag == old->c_iflag))
1353 return;
1354
1355 stl_setport(portp, tiosp);
1356 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1357 -1);
1358 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1359 tty->hw_stopped = 0;
1360 stl_start(tty);
1361 }
1362 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1363 wake_up_interruptible(&portp->open_wait);
1364 }
1365
1366 /*****************************************************************************/
1367
1368 /*
1369 * Attempt to flow control who ever is sending us data. Based on termios
1370 * settings use software or/and hardware flow control.
1371 */
1372
1373 static void stl_throttle(struct tty_struct *tty)
1374 {
1375 struct stlport *portp;
1376
1377 pr_debug("stl_throttle(tty=%p)\n", tty);
1378
1379 if (tty == NULL)
1380 return;
1381 portp = tty->driver_data;
1382 if (portp == NULL)
1383 return;
1384 stl_flowctrl(portp, 0);
1385 }
1386
1387 /*****************************************************************************/
1388
1389 /*
1390 * Unflow control the device sending us data...
1391 */
1392
1393 static void stl_unthrottle(struct tty_struct *tty)
1394 {
1395 struct stlport *portp;
1396
1397 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1398
1399 if (tty == NULL)
1400 return;
1401 portp = tty->driver_data;
1402 if (portp == NULL)
1403 return;
1404 stl_flowctrl(portp, 1);
1405 }
1406
1407 /*****************************************************************************/
1408
1409 /*
1410 * Stop the transmitter. Basically to do this we will just turn TX
1411 * interrupts off.
1412 */
1413
1414 static void stl_stop(struct tty_struct *tty)
1415 {
1416 struct stlport *portp;
1417
1418 pr_debug("stl_stop(tty=%p)\n", tty);
1419
1420 if (tty == NULL)
1421 return;
1422 portp = tty->driver_data;
1423 if (portp == NULL)
1424 return;
1425 stl_startrxtx(portp, -1, 0);
1426 }
1427
1428 /*****************************************************************************/
1429
1430 /*
1431 * Hangup this port. This is pretty much like closing the port, only
1432 * a little more brutal. No waiting for data to drain. Shutdown the
1433 * port and maybe drop signals.
1434 */
1435
1436 static void stl_hangup(struct tty_struct *tty)
1437 {
1438 struct stlport *portp;
1439
1440 pr_debug("stl_hangup(tty=%p)\n", tty);
1441
1442 if (tty == NULL)
1443 return;
1444 portp = tty->driver_data;
1445 if (portp == NULL)
1446 return;
1447
1448 portp->flags &= ~ASYNC_INITIALIZED;
1449 stl_disableintrs(portp);
1450 if (tty->termios->c_cflag & HUPCL)
1451 stl_setsignals(portp, 0, 0);
1452 stl_enablerxtx(portp, 0, 0);
1453 stl_flushbuffer(tty);
1454 portp->istate = 0;
1455 set_bit(TTY_IO_ERROR, &tty->flags);
1456 if (portp->tx.buf != NULL) {
1457 kfree(portp->tx.buf);
1458 portp->tx.buf = NULL;
1459 portp->tx.head = NULL;
1460 portp->tx.tail = NULL;
1461 }
1462 portp->tty = NULL;
1463 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1464 portp->refcount = 0;
1465 wake_up_interruptible(&portp->open_wait);
1466 }
1467
1468 /*****************************************************************************/
1469
1470 static void stl_breakctl(struct tty_struct *tty, int state)
1471 {
1472 struct stlport *portp;
1473
1474 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1475
1476 if (tty == NULL)
1477 return;
1478 portp = tty->driver_data;
1479 if (portp == NULL)
1480 return;
1481
1482 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1483 }
1484
1485 /*****************************************************************************/
1486
1487 static void stl_sendxchar(struct tty_struct *tty, char ch)
1488 {
1489 struct stlport *portp;
1490
1491 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1492
1493 if (tty == NULL)
1494 return;
1495 portp = tty->driver_data;
1496 if (portp == NULL)
1497 return;
1498
1499 if (ch == STOP_CHAR(tty))
1500 stl_sendflow(portp, 0);
1501 else if (ch == START_CHAR(tty))
1502 stl_sendflow(portp, 1);
1503 else
1504 stl_putchar(tty, ch);
1505 }
1506
1507 /*****************************************************************************/
1508
1509 #define MAXLINE 80
1510
1511 /*
1512 * Format info for a specified port. The line is deliberately limited
1513 * to 80 characters. (If it is too long it will be truncated, if too
1514 * short then padded with spaces).
1515 */
1516
1517 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1518 {
1519 char *sp;
1520 int sigs, cnt;
1521
1522 sp = pos;
1523 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1524 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1525 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1526
1527 if (portp->stats.rxframing)
1528 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1529 if (portp->stats.rxparity)
1530 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1531 if (portp->stats.rxbreaks)
1532 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1533 if (portp->stats.rxoverrun)
1534 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1535
1536 sigs = stl_getsignals(portp);
1537 cnt = sprintf(sp, "%s%s%s%s%s ",
1538 (sigs & TIOCM_RTS) ? "|RTS" : "",
1539 (sigs & TIOCM_CTS) ? "|CTS" : "",
1540 (sigs & TIOCM_DTR) ? "|DTR" : "",
1541 (sigs & TIOCM_CD) ? "|DCD" : "",
1542 (sigs & TIOCM_DSR) ? "|DSR" : "");
1543 *sp = ' ';
1544 sp += cnt;
1545
1546 for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
1547 *sp++ = ' ';
1548 if (cnt >= MAXLINE)
1549 pos[(MAXLINE - 2)] = '+';
1550 pos[(MAXLINE - 1)] = '\n';
1551
1552 return MAXLINE;
1553 }
1554
1555 /*****************************************************************************/
1556
1557 /*
1558 * Port info, read from the /proc file system.
1559 */
1560
1561 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1562 {
1563 struct stlbrd *brdp;
1564 struct stlpanel *panelp;
1565 struct stlport *portp;
1566 unsigned int brdnr, panelnr, portnr;
1567 int totalport, curoff, maxoff;
1568 char *pos;
1569
1570 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1571 "data=%p\n", page, start, off, count, eof, data);
1572
1573 pos = page;
1574 totalport = 0;
1575 curoff = 0;
1576
1577 if (off == 0) {
1578 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1579 stl_drvversion);
1580 while (pos < (page + MAXLINE - 1))
1581 *pos++ = ' ';
1582 *pos++ = '\n';
1583 }
1584 curoff = MAXLINE;
1585
1586 /*
1587 * We scan through for each board, panel and port. The offset is
1588 * calculated on the fly, and irrelevant ports are skipped.
1589 */
1590 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1591 brdp = stl_brds[brdnr];
1592 if (brdp == NULL)
1593 continue;
1594 if (brdp->state == 0)
1595 continue;
1596
1597 maxoff = curoff + (brdp->nrports * MAXLINE);
1598 if (off >= maxoff) {
1599 curoff = maxoff;
1600 continue;
1601 }
1602
1603 totalport = brdnr * STL_MAXPORTS;
1604 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1605 panelp = brdp->panels[panelnr];
1606 if (panelp == NULL)
1607 continue;
1608
1609 maxoff = curoff + (panelp->nrports * MAXLINE);
1610 if (off >= maxoff) {
1611 curoff = maxoff;
1612 totalport += panelp->nrports;
1613 continue;
1614 }
1615
1616 for (portnr = 0; portnr < panelp->nrports; portnr++,
1617 totalport++) {
1618 portp = panelp->ports[portnr];
1619 if (portp == NULL)
1620 continue;
1621 if (off >= (curoff += MAXLINE))
1622 continue;
1623 if ((pos - page + MAXLINE) > count)
1624 goto stl_readdone;
1625 pos += stl_portinfo(portp, totalport, pos);
1626 }
1627 }
1628 }
1629
1630 *eof = 1;
1631
1632 stl_readdone:
1633 *start = page;
1634 return pos - page;
1635 }
1636
1637 /*****************************************************************************/
1638
1639 /*
1640 * All board interrupts are vectored through here first. This code then
1641 * calls off to the approrpriate board interrupt handlers.
1642 */
1643
1644 static irqreturn_t stl_intr(int irq, void *dev_id)
1645 {
1646 struct stlbrd *brdp = dev_id;
1647
1648 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1649
1650 return IRQ_RETVAL((* brdp->isr)(brdp));
1651 }
1652
1653 /*****************************************************************************/
1654
1655 /*
1656 * Interrupt service routine for EasyIO board types.
1657 */
1658
1659 static int stl_eiointr(struct stlbrd *brdp)
1660 {
1661 struct stlpanel *panelp;
1662 unsigned int iobase;
1663 int handled = 0;
1664
1665 spin_lock(&brd_lock);
1666 panelp = brdp->panels[0];
1667 iobase = panelp->iobase;
1668 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1669 handled = 1;
1670 (* panelp->isr)(panelp, iobase);
1671 }
1672 spin_unlock(&brd_lock);
1673 return handled;
1674 }
1675
1676 /*****************************************************************************/
1677
1678 /*
1679 * Interrupt service routine for ECH-AT board types.
1680 */
1681
1682 static int stl_echatintr(struct stlbrd *brdp)
1683 {
1684 struct stlpanel *panelp;
1685 unsigned int ioaddr, bnknr;
1686 int handled = 0;
1687
1688 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1689
1690 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1691 handled = 1;
1692 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1693 ioaddr = brdp->bnkstataddr[bnknr];
1694 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1695 panelp = brdp->bnk2panel[bnknr];
1696 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1697 }
1698 }
1699 }
1700
1701 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1702
1703 return handled;
1704 }
1705
1706 /*****************************************************************************/
1707
1708 /*
1709 * Interrupt service routine for ECH-MCA board types.
1710 */
1711
1712 static int stl_echmcaintr(struct stlbrd *brdp)
1713 {
1714 struct stlpanel *panelp;
1715 unsigned int ioaddr, bnknr;
1716 int handled = 0;
1717
1718 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1719 handled = 1;
1720 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1721 ioaddr = brdp->bnkstataddr[bnknr];
1722 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1723 panelp = brdp->bnk2panel[bnknr];
1724 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1725 }
1726 }
1727 }
1728 return handled;
1729 }
1730
1731 /*****************************************************************************/
1732
1733 /*
1734 * Interrupt service routine for ECH-PCI board types.
1735 */
1736
1737 static int stl_echpciintr(struct stlbrd *brdp)
1738 {
1739 struct stlpanel *panelp;
1740 unsigned int ioaddr, bnknr, recheck;
1741 int handled = 0;
1742
1743 while (1) {
1744 recheck = 0;
1745 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1746 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1747 ioaddr = brdp->bnkstataddr[bnknr];
1748 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1749 panelp = brdp->bnk2panel[bnknr];
1750 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1751 recheck++;
1752 handled = 1;
1753 }
1754 }
1755 if (! recheck)
1756 break;
1757 }
1758 return handled;
1759 }
1760
1761 /*****************************************************************************/
1762
1763 /*
1764 * Interrupt service routine for ECH-8/64-PCI board types.
1765 */
1766
1767 static int stl_echpci64intr(struct stlbrd *brdp)
1768 {
1769 struct stlpanel *panelp;
1770 unsigned int ioaddr, bnknr;
1771 int handled = 0;
1772
1773 while (inb(brdp->ioctrl) & 0x1) {
1774 handled = 1;
1775 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1776 ioaddr = brdp->bnkstataddr[bnknr];
1777 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1778 panelp = brdp->bnk2panel[bnknr];
1779 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1780 }
1781 }
1782 }
1783
1784 return handled;
1785 }
1786
1787 /*****************************************************************************/
1788
1789 /*
1790 * Initialize all the ports on a panel.
1791 */
1792
1793 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1794 {
1795 struct stlport *portp;
1796 unsigned int i;
1797 int chipmask;
1798
1799 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1800
1801 chipmask = stl_panelinit(brdp, panelp);
1802
1803 /*
1804 * All UART's are initialized (if found!). Now go through and setup
1805 * each ports data structures.
1806 */
1807 for (i = 0; i < panelp->nrports; i++) {
1808 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1809 if (!portp) {
1810 printk("STALLION: failed to allocate memory "
1811 "(size=%Zd)\n", sizeof(struct stlport));
1812 break;
1813 }
1814
1815 portp->magic = STL_PORTMAGIC;
1816 portp->portnr = i;
1817 portp->brdnr = panelp->brdnr;
1818 portp->panelnr = panelp->panelnr;
1819 portp->uartp = panelp->uartp;
1820 portp->clk = brdp->clk;
1821 portp->baud_base = STL_BAUDBASE;
1822 portp->close_delay = STL_CLOSEDELAY;
1823 portp->closing_wait = 30 * HZ;
1824 init_waitqueue_head(&portp->open_wait);
1825 init_waitqueue_head(&portp->close_wait);
1826 portp->stats.brd = portp->brdnr;
1827 portp->stats.panel = portp->panelnr;
1828 portp->stats.port = portp->portnr;
1829 panelp->ports[i] = portp;
1830 stl_portinit(brdp, panelp, portp);
1831 }
1832
1833 return 0;
1834 }
1835
1836 static void stl_cleanup_panels(struct stlbrd *brdp)
1837 {
1838 struct stlpanel *panelp;
1839 struct stlport *portp;
1840 unsigned int j, k;
1841
1842 for (j = 0; j < STL_MAXPANELS; j++) {
1843 panelp = brdp->panels[j];
1844 if (panelp == NULL)
1845 continue;
1846 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1847 portp = panelp->ports[k];
1848 if (portp == NULL)
1849 continue;
1850 if (portp->tty != NULL)
1851 stl_hangup(portp->tty);
1852 kfree(portp->tx.buf);
1853 kfree(portp);
1854 }
1855 kfree(panelp);
1856 }
1857 }
1858
1859 /*****************************************************************************/
1860
1861 /*
1862 * Try to find and initialize an EasyIO board.
1863 */
1864
1865 static int __devinit stl_initeio(struct stlbrd *brdp)
1866 {
1867 struct stlpanel *panelp;
1868 unsigned int status;
1869 char *name;
1870 int retval;
1871
1872 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1873
1874 brdp->ioctrl = brdp->ioaddr1 + 1;
1875 brdp->iostatus = brdp->ioaddr1 + 2;
1876
1877 status = inb(brdp->iostatus);
1878 if ((status & EIO_IDBITMASK) == EIO_MK3)
1879 brdp->ioctrl++;
1880
1881 /*
1882 * Handle board specific stuff now. The real difference is PCI
1883 * or not PCI.
1884 */
1885 if (brdp->brdtype == BRD_EASYIOPCI) {
1886 brdp->iosize1 = 0x80;
1887 brdp->iosize2 = 0x80;
1888 name = "serial(EIO-PCI)";
1889 outb(0x41, (brdp->ioaddr2 + 0x4c));
1890 } else {
1891 brdp->iosize1 = 8;
1892 name = "serial(EIO)";
1893 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1894 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1895 printk("STALLION: invalid irq=%d for brd=%d\n",
1896 brdp->irq, brdp->brdnr);
1897 retval = -EINVAL;
1898 goto err;
1899 }
1900 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1901 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1902 brdp->ioctrl);
1903 }
1904
1905 retval = -EBUSY;
1906 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1907 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1908 "%x conflicts with another device\n", brdp->brdnr,
1909 brdp->ioaddr1);
1910 goto err;
1911 }
1912
1913 if (brdp->iosize2 > 0)
1914 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1915 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1916 "address %x conflicts with another device\n",
1917 brdp->brdnr, brdp->ioaddr2);
1918 printk(KERN_WARNING "STALLION: Warning, also "
1919 "releasing board %d I/O address %x \n",
1920 brdp->brdnr, brdp->ioaddr1);
1921 goto err_rel1;
1922 }
1923
1924 /*
1925 * Everything looks OK, so let's go ahead and probe for the hardware.
1926 */
1927 brdp->clk = CD1400_CLK;
1928 brdp->isr = stl_eiointr;
1929
1930 retval = -ENODEV;
1931 switch (status & EIO_IDBITMASK) {
1932 case EIO_8PORTM:
1933 brdp->clk = CD1400_CLK8M;
1934 /* fall thru */
1935 case EIO_8PORTRS:
1936 case EIO_8PORTDI:
1937 brdp->nrports = 8;
1938 break;
1939 case EIO_4PORTRS:
1940 brdp->nrports = 4;
1941 break;
1942 case EIO_MK3:
1943 switch (status & EIO_BRDMASK) {
1944 case ID_BRD4:
1945 brdp->nrports = 4;
1946 break;
1947 case ID_BRD8:
1948 brdp->nrports = 8;
1949 break;
1950 case ID_BRD16:
1951 brdp->nrports = 16;
1952 break;
1953 default:
1954 goto err_rel2;
1955 }
1956 break;
1957 default:
1958 goto err_rel2;
1959 }
1960
1961 /*
1962 * We have verified that the board is actually present, so now we
1963 * can complete the setup.
1964 */
1965
1966 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1967 if (!panelp) {
1968 printk(KERN_WARNING "STALLION: failed to allocate memory "
1969 "(size=%Zd)\n", sizeof(struct stlpanel));
1970 retval = -ENOMEM;
1971 goto err_rel2;
1972 }
1973
1974 panelp->magic = STL_PANELMAGIC;
1975 panelp->brdnr = brdp->brdnr;
1976 panelp->panelnr = 0;
1977 panelp->nrports = brdp->nrports;
1978 panelp->iobase = brdp->ioaddr1;
1979 panelp->hwid = status;
1980 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1981 panelp->uartp = &stl_sc26198uart;
1982 panelp->isr = stl_sc26198intr;
1983 } else {
1984 panelp->uartp = &stl_cd1400uart;
1985 panelp->isr = stl_cd1400eiointr;
1986 }
1987
1988 brdp->panels[0] = panelp;
1989 brdp->nrpanels = 1;
1990 brdp->state |= BRD_FOUND;
1991 brdp->hwid = status;
1992 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1993 printk("STALLION: failed to register interrupt "
1994 "routine for %s irq=%d\n", name, brdp->irq);
1995 retval = -ENODEV;
1996 goto err_fr;
1997 }
1998
1999 return 0;
2000 err_fr:
2001 stl_cleanup_panels(brdp);
2002 err_rel2:
2003 if (brdp->iosize2 > 0)
2004 release_region(brdp->ioaddr2, brdp->iosize2);
2005 err_rel1:
2006 release_region(brdp->ioaddr1, brdp->iosize1);
2007 err:
2008 return retval;
2009 }
2010
2011 /*****************************************************************************/
2012
2013 /*
2014 * Try to find an ECH board and initialize it. This code is capable of
2015 * dealing with all types of ECH board.
2016 */
2017
2018 static int __devinit stl_initech(struct stlbrd *brdp)
2019 {
2020 struct stlpanel *panelp;
2021 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
2022 int retval;
2023 char *name;
2024
2025 pr_debug("stl_initech(brdp=%p)\n", brdp);
2026
2027 status = 0;
2028 conflict = 0;
2029
2030 /*
2031 * Set up the initial board register contents for boards. This varies a
2032 * bit between the different board types. So we need to handle each
2033 * separately. Also do a check that the supplied IRQ is good.
2034 */
2035 switch (brdp->brdtype) {
2036
2037 case BRD_ECH:
2038 brdp->isr = stl_echatintr;
2039 brdp->ioctrl = brdp->ioaddr1 + 1;
2040 brdp->iostatus = brdp->ioaddr1 + 1;
2041 status = inb(brdp->iostatus);
2042 if ((status & ECH_IDBITMASK) != ECH_ID) {
2043 retval = -ENODEV;
2044 goto err;
2045 }
2046 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2047 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2048 printk("STALLION: invalid irq=%d for brd=%d\n",
2049 brdp->irq, brdp->brdnr);
2050 retval = -EINVAL;
2051 goto err;
2052 }
2053 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2054 status |= (stl_vecmap[brdp->irq] << 1);
2055 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2056 brdp->ioctrlval = ECH_INTENABLE |
2057 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2058 for (i = 0; i < 10; i++)
2059 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2060 brdp->iosize1 = 2;
2061 brdp->iosize2 = 32;
2062 name = "serial(EC8/32)";
2063 outb(status, brdp->ioaddr1);
2064 break;
2065
2066 case BRD_ECHMC:
2067 brdp->isr = stl_echmcaintr;
2068 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2069 brdp->iostatus = brdp->ioctrl;
2070 status = inb(brdp->iostatus);
2071 if ((status & ECH_IDBITMASK) != ECH_ID) {
2072 retval = -ENODEV;
2073 goto err;
2074 }
2075 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2076 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2077 printk("STALLION: invalid irq=%d for brd=%d\n",
2078 brdp->irq, brdp->brdnr);
2079 retval = -EINVAL;
2080 goto err;
2081 }
2082 outb(ECHMC_BRDRESET, brdp->ioctrl);
2083 outb(ECHMC_INTENABLE, brdp->ioctrl);
2084 brdp->iosize1 = 64;
2085 name = "serial(EC8/32-MC)";
2086 break;
2087
2088 case BRD_ECHPCI:
2089 brdp->isr = stl_echpciintr;
2090 brdp->ioctrl = brdp->ioaddr1 + 2;
2091 brdp->iosize1 = 4;
2092 brdp->iosize2 = 8;
2093 name = "serial(EC8/32-PCI)";
2094 break;
2095
2096 case BRD_ECH64PCI:
2097 brdp->isr = stl_echpci64intr;
2098 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2099 outb(0x43, (brdp->ioaddr1 + 0x4c));
2100 brdp->iosize1 = 0x80;
2101 brdp->iosize2 = 0x80;
2102 name = "serial(EC8/64-PCI)";
2103 break;
2104
2105 default:
2106 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2107 retval = -EINVAL;
2108 goto err;
2109 }
2110
2111 /*
2112 * Check boards for possible IO address conflicts and return fail status
2113 * if an IO conflict found.
2114 */
2115 retval = -EBUSY;
2116 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2117 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2118 "%x conflicts with another device\n", brdp->brdnr,
2119 brdp->ioaddr1);
2120 goto err;
2121 }
2122
2123 if (brdp->iosize2 > 0)
2124 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2125 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2126 "address %x conflicts with another device\n",
2127 brdp->brdnr, brdp->ioaddr2);
2128 printk(KERN_WARNING "STALLION: Warning, also "
2129 "releasing board %d I/O address %x \n",
2130 brdp->brdnr, brdp->ioaddr1);
2131 goto err_rel1;
2132 }
2133
2134 /*
2135 * Scan through the secondary io address space looking for panels.
2136 * As we find'em allocate and initialize panel structures for each.
2137 */
2138 brdp->clk = CD1400_CLK;
2139 brdp->hwid = status;
2140
2141 ioaddr = brdp->ioaddr2;
2142 banknr = 0;
2143 panelnr = 0;
2144 nxtid = 0;
2145
2146 for (i = 0; i < STL_MAXPANELS; i++) {
2147 if (brdp->brdtype == BRD_ECHPCI) {
2148 outb(nxtid, brdp->ioctrl);
2149 ioaddr = brdp->ioaddr2;
2150 }
2151 status = inb(ioaddr + ECH_PNLSTATUS);
2152 if ((status & ECH_PNLIDMASK) != nxtid)
2153 break;
2154 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2155 if (!panelp) {
2156 printk("STALLION: failed to allocate memory "
2157 "(size=%Zd)\n", sizeof(struct stlpanel));
2158 retval = -ENOMEM;
2159 goto err_fr;
2160 }
2161 panelp->magic = STL_PANELMAGIC;
2162 panelp->brdnr = brdp->brdnr;
2163 panelp->panelnr = panelnr;
2164 panelp->iobase = ioaddr;
2165 panelp->pagenr = nxtid;
2166 panelp->hwid = status;
2167 brdp->bnk2panel[banknr] = panelp;
2168 brdp->bnkpageaddr[banknr] = nxtid;
2169 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2170
2171 if (status & ECH_PNLXPID) {
2172 panelp->uartp = &stl_sc26198uart;
2173 panelp->isr = stl_sc26198intr;
2174 if (status & ECH_PNL16PORT) {
2175 panelp->nrports = 16;
2176 brdp->bnk2panel[banknr] = panelp;
2177 brdp->bnkpageaddr[banknr] = nxtid;
2178 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2179 ECH_PNLSTATUS;
2180 } else
2181 panelp->nrports = 8;
2182 } else {
2183 panelp->uartp = &stl_cd1400uart;
2184 panelp->isr = stl_cd1400echintr;
2185 if (status & ECH_PNL16PORT) {
2186 panelp->nrports = 16;
2187 panelp->ackmask = 0x80;
2188 if (brdp->brdtype != BRD_ECHPCI)
2189 ioaddr += EREG_BANKSIZE;
2190 brdp->bnk2panel[banknr] = panelp;
2191 brdp->bnkpageaddr[banknr] = ++nxtid;
2192 brdp->bnkstataddr[banknr++] = ioaddr +
2193 ECH_PNLSTATUS;
2194 } else {
2195 panelp->nrports = 8;
2196 panelp->ackmask = 0xc0;
2197 }
2198 }
2199
2200 nxtid++;
2201 ioaddr += EREG_BANKSIZE;
2202 brdp->nrports += panelp->nrports;
2203 brdp->panels[panelnr++] = panelp;
2204 if ((brdp->brdtype != BRD_ECHPCI) &&
2205 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2206 retval = -EINVAL;
2207 goto err_fr;
2208 }
2209 }
2210
2211 brdp->nrpanels = panelnr;
2212 brdp->nrbnks = banknr;
2213 if (brdp->brdtype == BRD_ECH)
2214 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2215
2216 brdp->state |= BRD_FOUND;
2217 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2218 printk("STALLION: failed to register interrupt "
2219 "routine for %s irq=%d\n", name, brdp->irq);
2220 retval = -ENODEV;
2221 goto err_fr;
2222 }
2223
2224 return 0;
2225 err_fr:
2226 stl_cleanup_panels(brdp);
2227 if (brdp->iosize2 > 0)
2228 release_region(brdp->ioaddr2, brdp->iosize2);
2229 err_rel1:
2230 release_region(brdp->ioaddr1, brdp->iosize1);
2231 err:
2232 return retval;
2233 }
2234
2235 /*****************************************************************************/
2236
2237 /*
2238 * Initialize and configure the specified board.
2239 * Scan through all the boards in the configuration and see what we
2240 * can find. Handle EIO and the ECH boards a little differently here
2241 * since the initial search and setup is very different.
2242 */
2243
2244 static int __devinit stl_brdinit(struct stlbrd *brdp)
2245 {
2246 int i, retval;
2247
2248 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2249
2250 switch (brdp->brdtype) {
2251 case BRD_EASYIO:
2252 case BRD_EASYIOPCI:
2253 retval = stl_initeio(brdp);
2254 if (retval)
2255 goto err;
2256 break;
2257 case BRD_ECH:
2258 case BRD_ECHMC:
2259 case BRD_ECHPCI:
2260 case BRD_ECH64PCI:
2261 retval = stl_initech(brdp);
2262 if (retval)
2263 goto err;
2264 break;
2265 default:
2266 printk("STALLION: board=%d is unknown board type=%d\n",
2267 brdp->brdnr, brdp->brdtype);
2268 retval = -ENODEV;
2269 goto err;
2270 }
2271
2272 if ((brdp->state & BRD_FOUND) == 0) {
2273 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2274 stl_brdnames[brdp->brdtype], brdp->brdnr,
2275 brdp->ioaddr1, brdp->irq);
2276 goto err_free;
2277 }
2278
2279 for (i = 0; i < STL_MAXPANELS; i++)
2280 if (brdp->panels[i] != NULL)
2281 stl_initports(brdp, brdp->panels[i]);
2282
2283 printk("STALLION: %s found, board=%d io=%x irq=%d "
2284 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2285 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2286 brdp->nrports);
2287
2288 return 0;
2289 err_free:
2290 free_irq(brdp->irq, brdp);
2291
2292 stl_cleanup_panels(brdp);
2293
2294 release_region(brdp->ioaddr1, brdp->iosize1);
2295 if (brdp->iosize2 > 0)
2296 release_region(brdp->ioaddr2, brdp->iosize2);
2297 err:
2298 return retval;
2299 }
2300
2301 /*****************************************************************************/
2302
2303 /*
2304 * Find the next available board number that is free.
2305 */
2306
2307 static int __devinit stl_getbrdnr(void)
2308 {
2309 unsigned int i;
2310
2311 for (i = 0; i < STL_MAXBRDS; i++)
2312 if (stl_brds[i] == NULL) {
2313 if (i >= stl_nrbrds)
2314 stl_nrbrds = i + 1;
2315 return i;
2316 }
2317
2318 return -1;
2319 }
2320
2321 /*****************************************************************************/
2322 /*
2323 * We have a Stallion board. Allocate a board structure and
2324 * initialize it. Read its IO and IRQ resources from PCI
2325 * configuration space.
2326 */
2327
2328 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2329 const struct pci_device_id *ent)
2330 {
2331 struct stlbrd *brdp;
2332 unsigned int i, brdtype = ent->driver_data;
2333 int brdnr, retval = -ENODEV;
2334
2335 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2336 goto err;
2337
2338 retval = pci_enable_device(pdev);
2339 if (retval)
2340 goto err;
2341 brdp = stl_allocbrd();
2342 if (brdp == NULL) {
2343 retval = -ENOMEM;
2344 goto err;
2345 }
2346 mutex_lock(&stl_brdslock);
2347 brdnr = stl_getbrdnr();
2348 if (brdnr < 0) {
2349 dev_err(&pdev->dev, "too many boards found, "
2350 "maximum supported %d\n", STL_MAXBRDS);
2351 mutex_unlock(&stl_brdslock);
2352 retval = -ENODEV;
2353 goto err_fr;
2354 }
2355 brdp->brdnr = (unsigned int)brdnr;
2356 stl_brds[brdp->brdnr] = brdp;
2357 mutex_unlock(&stl_brdslock);
2358
2359 brdp->brdtype = brdtype;
2360 brdp->state |= STL_PROBED;
2361
2362 /*
2363 * We have all resources from the board, so let's setup the actual
2364 * board structure now.
2365 */
2366 switch (brdtype) {
2367 case BRD_ECHPCI:
2368 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2369 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2370 break;
2371 case BRD_ECH64PCI:
2372 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2373 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2374 break;
2375 case BRD_EASYIOPCI:
2376 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2377 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2378 break;
2379 default:
2380 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2381 break;
2382 }
2383
2384 brdp->irq = pdev->irq;
2385 retval = stl_brdinit(brdp);
2386 if (retval)
2387 goto err_null;
2388
2389 pci_set_drvdata(pdev, brdp);
2390
2391 for (i = 0; i < brdp->nrports; i++)
2392 tty_register_device(stl_serial,
2393 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2394
2395 return 0;
2396 err_null:
2397 stl_brds[brdp->brdnr] = NULL;
2398 err_fr:
2399 kfree(brdp);
2400 err:
2401 return retval;
2402 }
2403
2404 static void __devexit stl_pciremove(struct pci_dev *pdev)
2405 {
2406 struct stlbrd *brdp = pci_get_drvdata(pdev);
2407 unsigned int i;
2408
2409 free_irq(brdp->irq, brdp);
2410
2411 stl_cleanup_panels(brdp);
2412
2413 release_region(brdp->ioaddr1, brdp->iosize1);
2414 if (brdp->iosize2 > 0)
2415 release_region(brdp->ioaddr2, brdp->iosize2);
2416
2417 for (i = 0; i < brdp->nrports; i++)
2418 tty_unregister_device(stl_serial,
2419 brdp->brdnr * STL_MAXPORTS + i);
2420
2421 stl_brds[brdp->brdnr] = NULL;
2422 kfree(brdp);
2423 }
2424
2425 static struct pci_driver stl_pcidriver = {
2426 .name = "stallion",
2427 .id_table = stl_pcibrds,
2428 .probe = stl_pciprobe,
2429 .remove = __devexit_p(stl_pciremove)
2430 };
2431
2432 /*****************************************************************************/
2433
2434 /*
2435 * Return the board stats structure to user app.
2436 */
2437
2438 static int stl_getbrdstats(combrd_t __user *bp)
2439 {
2440 combrd_t stl_brdstats;
2441 struct stlbrd *brdp;
2442 struct stlpanel *panelp;
2443 unsigned int i;
2444
2445 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2446 return -EFAULT;
2447 if (stl_brdstats.brd >= STL_MAXBRDS)
2448 return -ENODEV;
2449 brdp = stl_brds[stl_brdstats.brd];
2450 if (brdp == NULL)
2451 return -ENODEV;
2452
2453 memset(&stl_brdstats, 0, sizeof(combrd_t));
2454 stl_brdstats.brd = brdp->brdnr;
2455 stl_brdstats.type = brdp->brdtype;
2456 stl_brdstats.hwid = brdp->hwid;
2457 stl_brdstats.state = brdp->state;
2458 stl_brdstats.ioaddr = brdp->ioaddr1;
2459 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2460 stl_brdstats.irq = brdp->irq;
2461 stl_brdstats.nrpanels = brdp->nrpanels;
2462 stl_brdstats.nrports = brdp->nrports;
2463 for (i = 0; i < brdp->nrpanels; i++) {
2464 panelp = brdp->panels[i];
2465 stl_brdstats.panels[i].panel = i;
2466 stl_brdstats.panels[i].hwid = panelp->hwid;
2467 stl_brdstats.panels[i].nrports = panelp->nrports;
2468 }
2469
2470 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2471 }
2472
2473 /*****************************************************************************/
2474
2475 /*
2476 * Resolve the referenced port number into a port struct pointer.
2477 */
2478
2479 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2480 {
2481 struct stlbrd *brdp;
2482 struct stlpanel *panelp;
2483
2484 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2485 return NULL;
2486 brdp = stl_brds[brdnr];
2487 if (brdp == NULL)
2488 return NULL;
2489 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2490 return NULL;
2491 panelp = brdp->panels[panelnr];
2492 if (panelp == NULL)
2493 return NULL;
2494 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2495 return NULL;
2496 return panelp->ports[portnr];
2497 }
2498
2499 /*****************************************************************************/
2500
2501 /*
2502 * Return the port stats structure to user app. A NULL port struct
2503 * pointer passed in means that we need to find out from the app
2504 * what port to get stats for (used through board control device).
2505 */
2506
2507 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2508 {
2509 comstats_t stl_comstats;
2510 unsigned char *head, *tail;
2511 unsigned long flags;
2512
2513 if (!portp) {
2514 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2515 return -EFAULT;
2516 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2517 stl_comstats.port);
2518 if (portp == NULL)
2519 return -ENODEV;
2520 }
2521
2522 portp->stats.state = portp->istate;
2523 portp->stats.flags = portp->flags;
2524 portp->stats.hwid = portp->hwid;
2525
2526 portp->stats.ttystate = 0;
2527 portp->stats.cflags = 0;
2528 portp->stats.iflags = 0;
2529 portp->stats.oflags = 0;
2530 portp->stats.lflags = 0;
2531 portp->stats.rxbuffered = 0;
2532
2533 spin_lock_irqsave(&stallion_lock, flags);
2534 if (portp->tty != NULL)
2535 if (portp->tty->driver_data == portp) {
2536 portp->stats.ttystate = portp->tty->flags;
2537 /* No longer available as a statistic */
2538 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2539 if (portp->tty->termios != NULL) {
2540 portp->stats.cflags = portp->tty->termios->c_cflag;
2541 portp->stats.iflags = portp->tty->termios->c_iflag;
2542 portp->stats.oflags = portp->tty->termios->c_oflag;
2543 portp->stats.lflags = portp->tty->termios->c_lflag;
2544 }
2545 }
2546 spin_unlock_irqrestore(&stallion_lock, flags);
2547
2548 head = portp->tx.head;
2549 tail = portp->tx.tail;
2550 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2551 (STL_TXBUFSIZE - (tail - head));
2552
2553 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2554
2555 return copy_to_user(cp, &portp->stats,
2556 sizeof(comstats_t)) ? -EFAULT : 0;
2557 }
2558
2559 /*****************************************************************************/
2560
2561 /*
2562 * Clear the port stats structure. We also return it zeroed out...
2563 */
2564
2565 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2566 {
2567 comstats_t stl_comstats;
2568
2569 if (!portp) {
2570 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2571 return -EFAULT;
2572 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2573 stl_comstats.port);
2574 if (portp == NULL)
2575 return -ENODEV;
2576 }
2577
2578 memset(&portp->stats, 0, sizeof(comstats_t));
2579 portp->stats.brd = portp->brdnr;
2580 portp->stats.panel = portp->panelnr;
2581 portp->stats.port = portp->portnr;
2582 return copy_to_user(cp, &portp->stats,
2583 sizeof(comstats_t)) ? -EFAULT : 0;
2584 }
2585
2586 /*****************************************************************************/
2587
2588 /*
2589 * Return the entire driver ports structure to a user app.
2590 */
2591
2592 static int stl_getportstruct(struct stlport __user *arg)
2593 {
2594 struct stlport stl_dummyport;
2595 struct stlport *portp;
2596
2597 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2598 return -EFAULT;
2599 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2600 stl_dummyport.portnr);
2601 if (!portp)
2602 return -ENODEV;
2603 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2604 }
2605
2606 /*****************************************************************************/
2607
2608 /*
2609 * Return the entire driver board structure to a user app.
2610 */
2611
2612 static int stl_getbrdstruct(struct stlbrd __user *arg)
2613 {
2614 struct stlbrd stl_dummybrd;
2615 struct stlbrd *brdp;
2616
2617 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2618 return -EFAULT;
2619 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2620 return -ENODEV;
2621 brdp = stl_brds[stl_dummybrd.brdnr];
2622 if (!brdp)
2623 return -ENODEV;
2624 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2625 }
2626
2627 /*****************************************************************************/
2628
2629 /*
2630 * The "staliomem" device is also required to do some special operations
2631 * on the board and/or ports. In this driver it is mostly used for stats
2632 * collection.
2633 */
2634
2635 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2636 {
2637 int brdnr, rc;
2638 void __user *argp = (void __user *)arg;
2639
2640 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2641
2642 brdnr = iminor(ip);
2643 if (brdnr >= STL_MAXBRDS)
2644 return -ENODEV;
2645 rc = 0;
2646
2647 switch (cmd) {
2648 case COM_GETPORTSTATS:
2649 rc = stl_getportstats(NULL, argp);
2650 break;
2651 case COM_CLRPORTSTATS:
2652 rc = stl_clrportstats(NULL, argp);
2653 break;
2654 case COM_GETBRDSTATS:
2655 rc = stl_getbrdstats(argp);
2656 break;
2657 case COM_READPORT:
2658 rc = stl_getportstruct(argp);
2659 break;
2660 case COM_READBOARD:
2661 rc = stl_getbrdstruct(argp);
2662 break;
2663 default:
2664 rc = -ENOIOCTLCMD;
2665 break;
2666 }
2667
2668 return rc;
2669 }
2670
2671 static const struct tty_operations stl_ops = {
2672 .open = stl_open,
2673 .close = stl_close,
2674 .write = stl_write,
2675 .put_char = stl_putchar,
2676 .flush_chars = stl_flushchars,
2677 .write_room = stl_writeroom,
2678 .chars_in_buffer = stl_charsinbuffer,
2679 .ioctl = stl_ioctl,
2680 .set_termios = stl_settermios,
2681 .throttle = stl_throttle,
2682 .unthrottle = stl_unthrottle,
2683 .stop = stl_stop,
2684 .start = stl_start,
2685 .hangup = stl_hangup,
2686 .flush_buffer = stl_flushbuffer,
2687 .break_ctl = stl_breakctl,
2688 .wait_until_sent = stl_waituntilsent,
2689 .send_xchar = stl_sendxchar,
2690 .read_proc = stl_readproc,
2691 .tiocmget = stl_tiocmget,
2692 .tiocmset = stl_tiocmset,
2693 };
2694
2695 /*****************************************************************************/
2696 /* CD1400 HARDWARE FUNCTIONS */
2697 /*****************************************************************************/
2698
2699 /*
2700 * These functions get/set/update the registers of the cd1400 UARTs.
2701 * Access to the cd1400 registers is via an address/data io port pair.
2702 * (Maybe should make this inline...)
2703 */
2704
2705 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2706 {
2707 outb((regnr + portp->uartaddr), portp->ioaddr);
2708 return inb(portp->ioaddr + EREG_DATA);
2709 }
2710
2711 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2712 {
2713 outb(regnr + portp->uartaddr, portp->ioaddr);
2714 outb(value, portp->ioaddr + EREG_DATA);
2715 }
2716
2717 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2718 {
2719 outb(regnr + portp->uartaddr, portp->ioaddr);
2720 if (inb(portp->ioaddr + EREG_DATA) != value) {
2721 outb(value, portp->ioaddr + EREG_DATA);
2722 return 1;
2723 }
2724 return 0;
2725 }
2726
2727 /*****************************************************************************/
2728
2729 /*
2730 * Inbitialize the UARTs in a panel. We don't care what sort of board
2731 * these ports are on - since the port io registers are almost
2732 * identical when dealing with ports.
2733 */
2734
2735 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2736 {
2737 unsigned int gfrcr;
2738 int chipmask, i, j;
2739 int nrchips, uartaddr, ioaddr;
2740 unsigned long flags;
2741
2742 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2743
2744 spin_lock_irqsave(&brd_lock, flags);
2745 BRDENABLE(panelp->brdnr, panelp->pagenr);
2746
2747 /*
2748 * Check that each chip is present and started up OK.
2749 */
2750 chipmask = 0;
2751 nrchips = panelp->nrports / CD1400_PORTS;
2752 for (i = 0; i < nrchips; i++) {
2753 if (brdp->brdtype == BRD_ECHPCI) {
2754 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2755 ioaddr = panelp->iobase;
2756 } else
2757 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2758 uartaddr = (i & 0x01) ? 0x080 : 0;
2759 outb((GFRCR + uartaddr), ioaddr);
2760 outb(0, (ioaddr + EREG_DATA));
2761 outb((CCR + uartaddr), ioaddr);
2762 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2763 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2764 outb((GFRCR + uartaddr), ioaddr);
2765 for (j = 0; j < CCR_MAXWAIT; j++)
2766 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2767 break;
2768
2769 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2770 printk("STALLION: cd1400 not responding, "
2771 "brd=%d panel=%d chip=%d\n",
2772 panelp->brdnr, panelp->panelnr, i);
2773 continue;
2774 }
2775 chipmask |= (0x1 << i);
2776 outb((PPR + uartaddr), ioaddr);
2777 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2778 }
2779
2780 BRDDISABLE(panelp->brdnr);
2781 spin_unlock_irqrestore(&brd_lock, flags);
2782 return chipmask;
2783 }
2784
2785 /*****************************************************************************/
2786
2787 /*
2788 * Initialize hardware specific port registers.
2789 */
2790
2791 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2792 {
2793 unsigned long flags;
2794 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2795 panelp, portp);
2796
2797 if ((brdp == NULL) || (panelp == NULL) ||
2798 (portp == NULL))
2799 return;
2800
2801 spin_lock_irqsave(&brd_lock, flags);
2802 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2803 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2804 portp->uartaddr = (portp->portnr & 0x04) << 5;
2805 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2806
2807 BRDENABLE(portp->brdnr, portp->pagenr);
2808 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2809 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2810 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2811 BRDDISABLE(portp->brdnr);
2812 spin_unlock_irqrestore(&brd_lock, flags);
2813 }
2814
2815 /*****************************************************************************/
2816
2817 /*
2818 * Wait for the command register to be ready. We will poll this,
2819 * since it won't usually take too long to be ready.
2820 */
2821
2822 static void stl_cd1400ccrwait(struct stlport *portp)
2823 {
2824 int i;
2825
2826 for (i = 0; i < CCR_MAXWAIT; i++)
2827 if (stl_cd1400getreg(portp, CCR) == 0)
2828 return;
2829
2830 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2831 portp->portnr, portp->panelnr, portp->brdnr);
2832 }
2833
2834 /*****************************************************************************/
2835
2836 /*
2837 * Set up the cd1400 registers for a port based on the termios port
2838 * settings.
2839 */
2840
2841 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2842 {
2843 struct stlbrd *brdp;
2844 unsigned long flags;
2845 unsigned int clkdiv, baudrate;
2846 unsigned char cor1, cor2, cor3;
2847 unsigned char cor4, cor5, ccr;
2848 unsigned char srer, sreron, sreroff;
2849 unsigned char mcor1, mcor2, rtpr;
2850 unsigned char clk, div;
2851
2852 cor1 = 0;
2853 cor2 = 0;
2854 cor3 = 0;
2855 cor4 = 0;
2856 cor5 = 0;
2857 ccr = 0;
2858 rtpr = 0;
2859 clk = 0;
2860 div = 0;
2861 mcor1 = 0;
2862 mcor2 = 0;
2863 sreron = 0;
2864 sreroff = 0;
2865
2866 brdp = stl_brds[portp->brdnr];
2867 if (brdp == NULL)
2868 return;
2869
2870 /*
2871 * Set up the RX char ignore mask with those RX error types we
2872 * can ignore. We can get the cd1400 to help us out a little here,
2873 * it will ignore parity errors and breaks for us.
2874 */
2875 portp->rxignoremsk = 0;
2876 if (tiosp->c_iflag & IGNPAR) {
2877 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2878 cor1 |= COR1_PARIGNORE;
2879 }
2880 if (tiosp->c_iflag & IGNBRK) {
2881 portp->rxignoremsk |= ST_BREAK;
2882 cor4 |= COR4_IGNBRK;
2883 }
2884
2885 portp->rxmarkmsk = ST_OVERRUN;
2886 if (tiosp->c_iflag & (INPCK | PARMRK))
2887 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2888 if (tiosp->c_iflag & BRKINT)
2889 portp->rxmarkmsk |= ST_BREAK;
2890
2891 /*
2892 * Go through the char size, parity and stop bits and set all the
2893 * option register appropriately.
2894 */
2895 switch (tiosp->c_cflag & CSIZE) {
2896 case CS5:
2897 cor1 |= COR1_CHL5;
2898 break;
2899 case CS6:
2900 cor1 |= COR1_CHL6;
2901 break;
2902 case CS7:
2903 cor1 |= COR1_CHL7;
2904 break;
2905 default:
2906 cor1 |= COR1_CHL8;
2907 break;
2908 }
2909
2910 if (tiosp->c_cflag & CSTOPB)
2911 cor1 |= COR1_STOP2;
2912 else
2913 cor1 |= COR1_STOP1;
2914
2915 if (tiosp->c_cflag & PARENB) {
2916 if (tiosp->c_cflag & PARODD)
2917 cor1 |= (COR1_PARENB | COR1_PARODD);
2918 else
2919 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2920 } else {
2921 cor1 |= COR1_PARNONE;
2922 }
2923
2924 /*
2925 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2926 * space for hardware flow control and the like. This should be set to
2927 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2928 * really be based on VTIME.
2929 */
2930 cor3 |= FIFO_RXTHRESHOLD;
2931 rtpr = 2;
2932
2933 /*
2934 * Calculate the baud rate timers. For now we will just assume that
2935 * the input and output baud are the same. Could have used a baud
2936 * table here, but this way we can generate virtually any baud rate
2937 * we like!
2938 */
2939 baudrate = tiosp->c_cflag & CBAUD;
2940 if (baudrate & CBAUDEX) {
2941 baudrate &= ~CBAUDEX;
2942 if ((baudrate < 1) || (baudrate > 4))
2943 tiosp->c_cflag &= ~CBAUDEX;
2944 else
2945 baudrate += 15;
2946 }
2947 baudrate = stl_baudrates[baudrate];
2948 if ((tiosp->c_cflag & CBAUD) == B38400) {
2949 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2950 baudrate = 57600;
2951 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2952 baudrate = 115200;
2953 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2954 baudrate = 230400;
2955 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2956 baudrate = 460800;
2957 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2958 baudrate = (portp->baud_base / portp->custom_divisor);
2959 }
2960 if (baudrate > STL_CD1400MAXBAUD)
2961 baudrate = STL_CD1400MAXBAUD;
2962
2963 if (baudrate > 0) {
2964 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2965 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2966 if (clkdiv < 0x100)
2967 break;
2968 }
2969 div = (unsigned char) clkdiv;
2970 }
2971
2972 /*
2973 * Check what form of modem signaling is required and set it up.
2974 */
2975 if ((tiosp->c_cflag & CLOCAL) == 0) {
2976 mcor1 |= MCOR1_DCD;
2977 mcor2 |= MCOR2_DCD;
2978 sreron |= SRER_MODEM;
2979 portp->flags |= ASYNC_CHECK_CD;
2980 } else
2981 portp->flags &= ~ASYNC_CHECK_CD;
2982
2983 /*
2984 * Setup cd1400 enhanced modes if we can. In particular we want to
2985 * handle as much of the flow control as possible automatically. As
2986 * well as saving a few CPU cycles it will also greatly improve flow
2987 * control reliability.
2988 */
2989 if (tiosp->c_iflag & IXON) {
2990 cor2 |= COR2_TXIBE;
2991 cor3 |= COR3_SCD12;
2992 if (tiosp->c_iflag & IXANY)
2993 cor2 |= COR2_IXM;
2994 }
2995
2996 if (tiosp->c_cflag & CRTSCTS) {
2997 cor2 |= COR2_CTSAE;
2998 mcor1 |= FIFO_RTSTHRESHOLD;
2999 }
3000
3001 /*
3002 * All cd1400 register values calculated so go through and set
3003 * them all up.
3004 */
3005
3006 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3007 portp->portnr, portp->panelnr, portp->brdnr);
3008 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3009 cor1, cor2, cor3, cor4, cor5);
3010 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3011 mcor1, mcor2, rtpr, sreron, sreroff);
3012 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3013 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3014 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3015 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3016
3017 spin_lock_irqsave(&brd_lock, flags);
3018 BRDENABLE(portp->brdnr, portp->pagenr);
3019 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3020 srer = stl_cd1400getreg(portp, SRER);
3021 stl_cd1400setreg(portp, SRER, 0);
3022 if (stl_cd1400updatereg(portp, COR1, cor1))
3023 ccr = 1;
3024 if (stl_cd1400updatereg(portp, COR2, cor2))
3025 ccr = 1;
3026 if (stl_cd1400updatereg(portp, COR3, cor3))
3027 ccr = 1;
3028 if (ccr) {
3029 stl_cd1400ccrwait(portp);
3030 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3031 }
3032 stl_cd1400setreg(portp, COR4, cor4);
3033 stl_cd1400setreg(portp, COR5, cor5);
3034 stl_cd1400setreg(portp, MCOR1, mcor1);
3035 stl_cd1400setreg(portp, MCOR2, mcor2);
3036 if (baudrate > 0) {
3037 stl_cd1400setreg(portp, TCOR, clk);
3038 stl_cd1400setreg(portp, TBPR, div);
3039 stl_cd1400setreg(portp, RCOR, clk);
3040 stl_cd1400setreg(portp, RBPR, div);
3041 }
3042 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3043 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3044 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3045 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3046 stl_cd1400setreg(portp, RTPR, rtpr);
3047 mcor1 = stl_cd1400getreg(portp, MSVR1);
3048 if (mcor1 & MSVR1_DCD)
3049 portp->sigs |= TIOCM_CD;
3050 else
3051 portp->sigs &= ~TIOCM_CD;
3052 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3053 BRDDISABLE(portp->brdnr);
3054 spin_unlock_irqrestore(&brd_lock, flags);
3055 }
3056
3057 /*****************************************************************************/
3058
3059 /*
3060 * Set the state of the DTR and RTS signals.
3061 */
3062
3063 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3064 {
3065 unsigned char msvr1, msvr2;
3066 unsigned long flags;
3067
3068 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3069 portp, dtr, rts);
3070
3071 msvr1 = 0;
3072 msvr2 = 0;
3073 if (dtr > 0)
3074 msvr1 = MSVR1_DTR;
3075 if (rts > 0)
3076 msvr2 = MSVR2_RTS;
3077
3078 spin_lock_irqsave(&brd_lock, flags);
3079 BRDENABLE(portp->brdnr, portp->pagenr);
3080 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3081 if (rts >= 0)
3082 stl_cd1400setreg(portp, MSVR2, msvr2);
3083 if (dtr >= 0)
3084 stl_cd1400setreg(portp, MSVR1, msvr1);
3085 BRDDISABLE(portp->brdnr);
3086 spin_unlock_irqrestore(&brd_lock, flags);
3087 }
3088
3089 /*****************************************************************************/
3090
3091 /*
3092 * Return the state of the signals.
3093 */
3094
3095 static int stl_cd1400getsignals(struct stlport *portp)
3096 {
3097 unsigned char msvr1, msvr2;
3098 unsigned long flags;
3099 int sigs;
3100
3101 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3102
3103 spin_lock_irqsave(&brd_lock, flags);
3104 BRDENABLE(portp->brdnr, portp->pagenr);
3105 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3106 msvr1 = stl_cd1400getreg(portp, MSVR1);
3107 msvr2 = stl_cd1400getreg(portp, MSVR2);
3108 BRDDISABLE(portp->brdnr);
3109 spin_unlock_irqrestore(&brd_lock, flags);
3110
3111 sigs = 0;
3112 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3113 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3114 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3115 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3116 #if 0
3117 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3118 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3119 #else
3120 sigs |= TIOCM_DSR;
3121 #endif
3122 return sigs;
3123 }
3124
3125 /*****************************************************************************/
3126
3127 /*
3128 * Enable/Disable the Transmitter and/or Receiver.
3129 */
3130
3131 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3132 {
3133 unsigned char ccr;
3134 unsigned long flags;
3135
3136 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3137
3138 ccr = 0;
3139
3140 if (tx == 0)
3141 ccr |= CCR_TXDISABLE;
3142 else if (tx > 0)
3143 ccr |= CCR_TXENABLE;
3144 if (rx == 0)
3145 ccr |= CCR_RXDISABLE;
3146 else if (rx > 0)
3147 ccr |= CCR_RXENABLE;
3148
3149 spin_lock_irqsave(&brd_lock, flags);
3150 BRDENABLE(portp->brdnr, portp->pagenr);
3151 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3152 stl_cd1400ccrwait(portp);
3153 stl_cd1400setreg(portp, CCR, ccr);
3154 stl_cd1400ccrwait(portp);
3155 BRDDISABLE(portp->brdnr);
3156 spin_unlock_irqrestore(&brd_lock, flags);
3157 }
3158
3159 /*****************************************************************************/
3160
3161 /*
3162 * Start/stop the Transmitter and/or Receiver.
3163 */
3164
3165 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3166 {
3167 unsigned char sreron, sreroff;
3168 unsigned long flags;
3169
3170 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3171
3172 sreron = 0;
3173 sreroff = 0;
3174 if (tx == 0)
3175 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3176 else if (tx == 1)
3177 sreron |= SRER_TXDATA;
3178 else if (tx >= 2)
3179 sreron |= SRER_TXEMPTY;
3180 if (rx == 0)
3181 sreroff |= SRER_RXDATA;
3182 else if (rx > 0)
3183 sreron |= SRER_RXDATA;
3184
3185 spin_lock_irqsave(&brd_lock, flags);
3186 BRDENABLE(portp->brdnr, portp->pagenr);
3187 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3188 stl_cd1400setreg(portp, SRER,
3189 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3190 BRDDISABLE(portp->brdnr);
3191 if (tx > 0)
3192 set_bit(ASYI_TXBUSY, &portp->istate);
3193 spin_unlock_irqrestore(&brd_lock, flags);
3194 }
3195
3196 /*****************************************************************************/
3197
3198 /*
3199 * Disable all interrupts from this port.
3200 */
3201
3202 static void stl_cd1400disableintrs(struct stlport *portp)
3203 {
3204 unsigned long flags;
3205
3206 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3207
3208 spin_lock_irqsave(&brd_lock, flags);
3209 BRDENABLE(portp->brdnr, portp->pagenr);
3210 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3211 stl_cd1400setreg(portp, SRER, 0);
3212 BRDDISABLE(portp->brdnr);
3213 spin_unlock_irqrestore(&brd_lock, flags);
3214 }
3215
3216 /*****************************************************************************/
3217
3218 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3219 {
3220 unsigned long flags;
3221
3222 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3223
3224 spin_lock_irqsave(&brd_lock, flags);
3225 BRDENABLE(portp->brdnr, portp->pagenr);
3226 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3227 stl_cd1400setreg(portp, SRER,
3228 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3229 SRER_TXEMPTY));
3230 BRDDISABLE(portp->brdnr);
3231 portp->brklen = len;
3232 if (len == 1)
3233 portp->stats.txbreaks++;
3234 spin_unlock_irqrestore(&brd_lock, flags);
3235 }
3236
3237 /*****************************************************************************/
3238
3239 /*
3240 * Take flow control actions...
3241 */
3242
3243 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3244 {
3245 struct tty_struct *tty;
3246 unsigned long flags;
3247
3248 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3249
3250 if (portp == NULL)
3251 return;
3252 tty = portp->tty;
3253 if (tty == NULL)
3254 return;
3255
3256 spin_lock_irqsave(&brd_lock, flags);
3257 BRDENABLE(portp->brdnr, portp->pagenr);
3258 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3259
3260 if (state) {
3261 if (tty->termios->c_iflag & IXOFF) {
3262 stl_cd1400ccrwait(portp);
3263 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3264 portp->stats.rxxon++;
3265 stl_cd1400ccrwait(portp);
3266 }
3267 /*
3268 * Question: should we return RTS to what it was before? It may
3269 * have been set by an ioctl... Suppose not, since if you have
3270 * hardware flow control set then it is pretty silly to go and
3271 * set the RTS line by hand.
3272 */
3273 if (tty->termios->c_cflag & CRTSCTS) {
3274 stl_cd1400setreg(portp, MCOR1,
3275 (stl_cd1400getreg(portp, MCOR1) |
3276 FIFO_RTSTHRESHOLD));
3277 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3278 portp->stats.rxrtson++;
3279 }
3280 } else {
3281 if (tty->termios->c_iflag & IXOFF) {
3282 stl_cd1400ccrwait(portp);
3283 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3284 portp->stats.rxxoff++;
3285 stl_cd1400ccrwait(portp);
3286 }
3287 if (tty->termios->c_cflag & CRTSCTS) {
3288 stl_cd1400setreg(portp, MCOR1,
3289 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3290 stl_cd1400setreg(portp, MSVR2, 0);
3291 portp->stats.rxrtsoff++;
3292 }
3293 }
3294
3295 BRDDISABLE(portp->brdnr);
3296 spin_unlock_irqrestore(&brd_lock, flags);
3297 }
3298
3299 /*****************************************************************************/
3300
3301 /*
3302 * Send a flow control character...
3303 */
3304
3305 static void stl_cd1400sendflow(struct stlport *portp, int state)
3306 {
3307 struct tty_struct *tty;
3308 unsigned long flags;
3309
3310 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3311
3312 if (portp == NULL)
3313 return;
3314 tty = portp->tty;
3315 if (tty == NULL)
3316 return;
3317
3318 spin_lock_irqsave(&brd_lock, flags);
3319 BRDENABLE(portp->brdnr, portp->pagenr);
3320 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3321 if (state) {
3322 stl_cd1400ccrwait(portp);
3323 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3324 portp->stats.rxxon++;
3325 stl_cd1400ccrwait(portp);
3326 } else {
3327 stl_cd1400ccrwait(portp);
3328 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3329 portp->stats.rxxoff++;
3330 stl_cd1400ccrwait(portp);
3331 }
3332 BRDDISABLE(portp->brdnr);
3333 spin_unlock_irqrestore(&brd_lock, flags);
3334 }
3335
3336 /*****************************************************************************/
3337
3338 static void stl_cd1400flush(struct stlport *portp)
3339 {
3340 unsigned long flags;
3341
3342 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3343
3344 if (portp == NULL)
3345 return;
3346
3347 spin_lock_irqsave(&brd_lock, flags);
3348 BRDENABLE(portp->brdnr, portp->pagenr);
3349 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3350 stl_cd1400ccrwait(portp);
3351 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3352 stl_cd1400ccrwait(portp);
3353 portp->tx.tail = portp->tx.head;
3354 BRDDISABLE(portp->brdnr);
3355 spin_unlock_irqrestore(&brd_lock, flags);
3356 }
3357
3358 /*****************************************************************************/
3359
3360 /*
3361 * Return the current state of data flow on this port. This is only
3362 * really interresting when determining if data has fully completed
3363 * transmission or not... This is easy for the cd1400, it accurately
3364 * maintains the busy port flag.
3365 */
3366
3367 static int stl_cd1400datastate(struct stlport *portp)
3368 {
3369 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3370
3371 if (portp == NULL)
3372 return 0;
3373
3374 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3375 }
3376
3377 /*****************************************************************************/
3378
3379 /*
3380 * Interrupt service routine for cd1400 EasyIO boards.
3381 */
3382
3383 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3384 {
3385 unsigned char svrtype;
3386
3387 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3388
3389 spin_lock(&brd_lock);
3390 outb(SVRR, iobase);
3391 svrtype = inb(iobase + EREG_DATA);
3392 if (panelp->nrports > 4) {
3393 outb((SVRR + 0x80), iobase);
3394 svrtype |= inb(iobase + EREG_DATA);
3395 }
3396
3397 if (svrtype & SVRR_RX)
3398 stl_cd1400rxisr(panelp, iobase);
3399 else if (svrtype & SVRR_TX)
3400 stl_cd1400txisr(panelp, iobase);
3401 else if (svrtype & SVRR_MDM)
3402 stl_cd1400mdmisr(panelp, iobase);
3403
3404 spin_unlock(&brd_lock);
3405 }
3406
3407 /*****************************************************************************/
3408
3409 /*
3410 * Interrupt service routine for cd1400 panels.
3411 */
3412
3413 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3414 {
3415 unsigned char svrtype;
3416
3417 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3418
3419 outb(SVRR, iobase);
3420 svrtype = inb(iobase + EREG_DATA);
3421 outb((SVRR + 0x80), iobase);
3422 svrtype |= inb(iobase + EREG_DATA);
3423 if (svrtype & SVRR_RX)
3424 stl_cd1400rxisr(panelp, iobase);
3425 else if (svrtype & SVRR_TX)
3426 stl_cd1400txisr(panelp, iobase);
3427 else if (svrtype & SVRR_MDM)
3428 stl_cd1400mdmisr(panelp, iobase);
3429 }
3430
3431
3432 /*****************************************************************************/
3433
3434 /*
3435 * Unfortunately we need to handle breaks in the TX data stream, since
3436 * this is the only way to generate them on the cd1400.
3437 */
3438
3439 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3440 {
3441 if (portp->brklen == 1) {
3442 outb((COR2 + portp->uartaddr), ioaddr);
3443 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3444 (ioaddr + EREG_DATA));
3445 outb((TDR + portp->uartaddr), ioaddr);
3446 outb(ETC_CMD, (ioaddr + EREG_DATA));
3447 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3448 outb((SRER + portp->uartaddr), ioaddr);
3449 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3450 (ioaddr + EREG_DATA));
3451 return 1;
3452 } else if (portp->brklen > 1) {
3453 outb((TDR + portp->uartaddr), ioaddr);
3454 outb(ETC_CMD, (ioaddr + EREG_DATA));
3455 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3456 portp->brklen = -1;
3457 return 1;
3458 } else {
3459 outb((COR2 + portp->uartaddr), ioaddr);
3460 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3461 (ioaddr + EREG_DATA));
3462 portp->brklen = 0;
3463 }
3464 return 0;
3465 }
3466
3467 /*****************************************************************************/
3468
3469 /*
3470 * Transmit interrupt handler. This has gotta be fast! Handling TX
3471 * chars is pretty simple, stuff as many as possible from the TX buffer
3472 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3473 * are embedded as commands in the data stream. Oh no, had to use a goto!
3474 * This could be optimized more, will do when I get time...
3475 * In practice it is possible that interrupts are enabled but that the
3476 * port has been hung up. Need to handle not having any TX buffer here,
3477 * this is done by using the side effect that head and tail will also
3478 * be NULL if the buffer has been freed.
3479 */
3480
3481 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3482 {
3483 struct stlport *portp;
3484 int len, stlen;
3485 char *head, *tail;
3486 unsigned char ioack, srer;
3487
3488 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3489
3490 ioack = inb(ioaddr + EREG_TXACK);
3491 if (((ioack & panelp->ackmask) != 0) ||
3492 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3493 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3494 return;
3495 }
3496 portp = panelp->ports[(ioack >> 3)];
3497
3498 /*
3499 * Unfortunately we need to handle breaks in the data stream, since
3500 * this is the only way to generate them on the cd1400. Do it now if
3501 * a break is to be sent.
3502 */
3503 if (portp->brklen != 0)
3504 if (stl_cd1400breakisr(portp, ioaddr))
3505 goto stl_txalldone;
3506
3507 head = portp->tx.head;
3508 tail = portp->tx.tail;
3509 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3510 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3511 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3512 set_bit(ASYI_TXLOW, &portp->istate);
3513 if (portp->tty)
3514 tty_wakeup(portp->tty);
3515 }
3516
3517 if (len == 0) {
3518 outb((SRER + portp->uartaddr), ioaddr);
3519 srer = inb(ioaddr + EREG_DATA);
3520 if (srer & SRER_TXDATA) {
3521 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3522 } else {
3523 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3524 clear_bit(ASYI_TXBUSY, &portp->istate);
3525 }
3526 outb(srer, (ioaddr + EREG_DATA));
3527 } else {
3528 len = min(len, CD1400_TXFIFOSIZE);
3529 portp->stats.txtotal += len;
3530 stlen = min_t(unsigned int, len,
3531 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3532 outb((TDR + portp->uartaddr), ioaddr);
3533 outsb((ioaddr + EREG_DATA), tail, stlen);
3534 len -= stlen;
3535 tail += stlen;
3536 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3537 tail = portp->tx.buf;
3538 if (len > 0) {
3539 outsb((ioaddr + EREG_DATA), tail, len);
3540 tail += len;
3541 }
3542 portp->tx.tail = tail;
3543 }
3544
3545 stl_txalldone:
3546 outb((EOSRR + portp->uartaddr), ioaddr);
3547 outb(0, (ioaddr + EREG_DATA));
3548 }
3549
3550 /*****************************************************************************/
3551
3552 /*
3553 * Receive character interrupt handler. Determine if we have good chars
3554 * or bad chars and then process appropriately. Good chars are easy
3555 * just shove the lot into the RX buffer and set all status byte to 0.
3556 * If a bad RX char then process as required. This routine needs to be
3557 * fast! In practice it is possible that we get an interrupt on a port
3558 * that is closed. This can happen on hangups - since they completely
3559 * shutdown a port not in user context. Need to handle this case.
3560 */
3561
3562 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3563 {
3564 struct stlport *portp;
3565 struct tty_struct *tty;
3566 unsigned int ioack, len, buflen;
3567 unsigned char status;
3568 char ch;
3569
3570 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3571
3572 ioack = inb(ioaddr + EREG_RXACK);
3573 if ((ioack & panelp->ackmask) != 0) {
3574 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3575 return;
3576 }
3577 portp = panelp->ports[(ioack >> 3)];
3578 tty = portp->tty;
3579
3580 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3581 outb((RDCR + portp->uartaddr), ioaddr);
3582 len = inb(ioaddr + EREG_DATA);
3583 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3584 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3585 outb((RDSR + portp->uartaddr), ioaddr);
3586 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3587 portp->stats.rxlost += len;
3588 portp->stats.rxtotal += len;
3589 } else {
3590 len = min(len, buflen);
3591 if (len > 0) {
3592 unsigned char *ptr;
3593 outb((RDSR + portp->uartaddr), ioaddr);
3594 tty_prepare_flip_string(tty, &ptr, len);
3595 insb((ioaddr + EREG_DATA), ptr, len);
3596 tty_schedule_flip(tty);
3597 portp->stats.rxtotal += len;
3598 }
3599 }
3600 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3601 outb((RDSR + portp->uartaddr), ioaddr);
3602 status = inb(ioaddr + EREG_DATA);
3603 ch = inb(ioaddr + EREG_DATA);
3604 if (status & ST_PARITY)
3605 portp->stats.rxparity++;
3606 if (status & ST_FRAMING)
3607 portp->stats.rxframing++;
3608 if (status & ST_OVERRUN)
3609 portp->stats.rxoverrun++;
3610 if (status & ST_BREAK)
3611 portp->stats.rxbreaks++;
3612 if (status & ST_SCHARMASK) {
3613 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3614 portp->stats.txxon++;
3615 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3616 portp->stats.txxoff++;
3617 goto stl_rxalldone;
3618 }
3619 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3620 if (portp->rxmarkmsk & status) {
3621 if (status & ST_BREAK) {
3622 status = TTY_BREAK;
3623 if (portp->flags & ASYNC_SAK) {
3624 do_SAK(tty);
3625 BRDENABLE(portp->brdnr, portp->pagenr);
3626 }
3627 } else if (status & ST_PARITY)
3628 status = TTY_PARITY;
3629 else if (status & ST_FRAMING)
3630 status = TTY_FRAME;
3631 else if(status & ST_OVERRUN)
3632 status = TTY_OVERRUN;
3633 else
3634 status = 0;
3635 } else
3636 status = 0;
3637 tty_insert_flip_char(tty, ch, status);
3638 tty_schedule_flip(tty);
3639 }
3640 } else {
3641 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3642 return;
3643 }
3644
3645 stl_rxalldone:
3646 outb((EOSRR + portp->uartaddr), ioaddr);
3647 outb(0, (ioaddr + EREG_DATA));
3648 }
3649
3650 /*****************************************************************************/
3651
3652 /*
3653 * Modem interrupt handler. The is called when the modem signal line
3654 * (DCD) has changed state. Leave most of the work to the off-level
3655 * processing routine.
3656 */
3657
3658 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3659 {
3660 struct stlport *portp;
3661 unsigned int ioack;
3662 unsigned char misr;
3663
3664 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3665
3666 ioack = inb(ioaddr + EREG_MDACK);
3667 if (((ioack & panelp->ackmask) != 0) ||
3668 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3669 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3670 return;
3671 }
3672 portp = panelp->ports[(ioack >> 3)];
3673
3674 outb((MISR + portp->uartaddr), ioaddr);
3675 misr = inb(ioaddr + EREG_DATA);
3676 if (misr & MISR_DCD) {
3677 stl_cd_change(portp);
3678 portp->stats.modem++;
3679 }
3680
3681 outb((EOSRR + portp->uartaddr), ioaddr);
3682 outb(0, (ioaddr + EREG_DATA));
3683 }
3684
3685 /*****************************************************************************/
3686 /* SC26198 HARDWARE FUNCTIONS */
3687 /*****************************************************************************/
3688
3689 /*
3690 * These functions get/set/update the registers of the sc26198 UARTs.
3691 * Access to the sc26198 registers is via an address/data io port pair.
3692 * (Maybe should make this inline...)
3693 */
3694
3695 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3696 {
3697 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3698 return inb(portp->ioaddr + XP_DATA);
3699 }
3700
3701 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3702 {
3703 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3704 outb(value, (portp->ioaddr + XP_DATA));
3705 }
3706
3707 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3708 {
3709 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3710 if (inb(portp->ioaddr + XP_DATA) != value) {
3711 outb(value, (portp->ioaddr + XP_DATA));
3712 return 1;
3713 }
3714 return 0;
3715 }
3716
3717 /*****************************************************************************/
3718
3719 /*
3720 * Functions to get and set the sc26198 global registers.
3721 */
3722
3723 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3724 {
3725 outb(regnr, (portp->ioaddr + XP_ADDR));
3726 return inb(portp->ioaddr + XP_DATA);
3727 }
3728
3729 #if 0
3730 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3731 {
3732 outb(regnr, (portp->ioaddr + XP_ADDR));
3733 outb(value, (portp->ioaddr + XP_DATA));
3734 }
3735 #endif
3736
3737 /*****************************************************************************/
3738
3739 /*
3740 * Inbitialize the UARTs in a panel. We don't care what sort of board
3741 * these ports are on - since the port io registers are almost
3742 * identical when dealing with ports.
3743 */
3744
3745 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3746 {
3747 int chipmask, i;
3748 int nrchips, ioaddr;
3749
3750 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3751
3752 BRDENABLE(panelp->brdnr, panelp->pagenr);
3753
3754 /*
3755 * Check that each chip is present and started up OK.
3756 */
3757 chipmask = 0;
3758 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3759 if (brdp->brdtype == BRD_ECHPCI)
3760 outb(panelp->pagenr, brdp->ioctrl);
3761
3762 for (i = 0; i < nrchips; i++) {
3763 ioaddr = panelp->iobase + (i * 4);
3764 outb(SCCR, (ioaddr + XP_ADDR));
3765 outb(CR_RESETALL, (ioaddr + XP_DATA));
3766 outb(TSTR, (ioaddr + XP_ADDR));
3767 if (inb(ioaddr + XP_DATA) != 0) {
3768 printk("STALLION: sc26198 not responding, "
3769 "brd=%d panel=%d chip=%d\n",
3770 panelp->brdnr, panelp->panelnr, i);
3771 continue;
3772 }
3773 chipmask |= (0x1 << i);
3774 outb(GCCR, (ioaddr + XP_ADDR));
3775 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3776 outb(WDTRCR, (ioaddr + XP_ADDR));
3777 outb(0xff, (ioaddr + XP_DATA));
3778 }
3779
3780 BRDDISABLE(panelp->brdnr);
3781 return chipmask;
3782 }
3783
3784 /*****************************************************************************/
3785
3786 /*
3787 * Initialize hardware specific port registers.
3788 */
3789
3790 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3791 {
3792 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3793 panelp, portp);
3794
3795 if ((brdp == NULL) || (panelp == NULL) ||
3796 (portp == NULL))
3797 return;
3798
3799 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3800 portp->uartaddr = (portp->portnr & 0x07) << 4;
3801 portp->pagenr = panelp->pagenr;
3802 portp->hwid = 0x1;
3803
3804 BRDENABLE(portp->brdnr, portp->pagenr);
3805 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3806 BRDDISABLE(portp->brdnr);
3807 }
3808
3809 /*****************************************************************************/
3810
3811 /*
3812 * Set up the sc26198 registers for a port based on the termios port
3813 * settings.
3814 */
3815
3816 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3817 {
3818 struct stlbrd *brdp;
3819 unsigned long flags;
3820 unsigned int baudrate;
3821 unsigned char mr0, mr1, mr2, clk;
3822 unsigned char imron, imroff, iopr, ipr;
3823
3824 mr0 = 0;
3825 mr1 = 0;
3826 mr2 = 0;
3827 clk = 0;
3828 iopr = 0;
3829 imron = 0;
3830 imroff = 0;
3831
3832 brdp = stl_brds[portp->brdnr];
3833 if (brdp == NULL)
3834 return;
3835
3836 /*
3837 * Set up the RX char ignore mask with those RX error types we
3838 * can ignore.
3839 */
3840 portp->rxignoremsk = 0;
3841 if (tiosp->c_iflag & IGNPAR)
3842 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3843 SR_RXOVERRUN);
3844 if (tiosp->c_iflag & IGNBRK)
3845 portp->rxignoremsk |= SR_RXBREAK;
3846
3847 portp->rxmarkmsk = SR_RXOVERRUN;
3848 if (tiosp->c_iflag & (INPCK | PARMRK))
3849 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3850 if (tiosp->c_iflag & BRKINT)
3851 portp->rxmarkmsk |= SR_RXBREAK;
3852
3853 /*
3854 * Go through the char size, parity and stop bits and set all the
3855 * option register appropriately.
3856 */
3857 switch (tiosp->c_cflag & CSIZE) {
3858 case CS5:
3859 mr1 |= MR1_CS5;
3860 break;
3861 case CS6:
3862 mr1 |= MR1_CS6;
3863 break;
3864 case CS7:
3865 mr1 |= MR1_CS7;
3866 break;
3867 default:
3868 mr1 |= MR1_CS8;
3869 break;
3870 }
3871
3872 if (tiosp->c_cflag & CSTOPB)
3873 mr2 |= MR2_STOP2;
3874 else
3875 mr2 |= MR2_STOP1;
3876
3877 if (tiosp->c_cflag & PARENB) {
3878 if (tiosp->c_cflag & PARODD)
3879 mr1 |= (MR1_PARENB | MR1_PARODD);
3880 else
3881 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3882 } else
3883 mr1 |= MR1_PARNONE;
3884
3885 mr1 |= MR1_ERRBLOCK;
3886
3887 /*
3888 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3889 * space for hardware flow control and the like. This should be set to
3890 * VMIN.
3891 */
3892 mr2 |= MR2_RXFIFOHALF;
3893
3894 /*
3895 * Calculate the baud rate timers. For now we will just assume that
3896 * the input and output baud are the same. The sc26198 has a fixed
3897 * baud rate table, so only discrete baud rates possible.
3898 */
3899 baudrate = tiosp->c_cflag & CBAUD;
3900 if (baudrate & CBAUDEX) {
3901 baudrate &= ~CBAUDEX;
3902 if ((baudrate < 1) || (baudrate > 4))
3903 tiosp->c_cflag &= ~CBAUDEX;
3904 else
3905 baudrate += 15;
3906 }
3907 baudrate = stl_baudrates[baudrate];
3908 if ((tiosp->c_cflag & CBAUD) == B38400) {
3909 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3910 baudrate = 57600;
3911 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3912 baudrate = 115200;
3913 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3914 baudrate = 230400;
3915 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3916 baudrate = 460800;
3917 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3918 baudrate = (portp->baud_base / portp->custom_divisor);
3919 }
3920 if (baudrate > STL_SC26198MAXBAUD)
3921 baudrate = STL_SC26198MAXBAUD;
3922
3923 if (baudrate > 0)
3924 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3925 if (baudrate <= sc26198_baudtable[clk])
3926 break;
3927
3928 /*
3929 * Check what form of modem signaling is required and set it up.
3930 */
3931 if (tiosp->c_cflag & CLOCAL) {
3932 portp->flags &= ~ASYNC_CHECK_CD;
3933 } else {
3934 iopr |= IOPR_DCDCOS;
3935 imron |= IR_IOPORT;
3936 portp->flags |= ASYNC_CHECK_CD;
3937 }
3938
3939 /*
3940 * Setup sc26198 enhanced modes if we can. In particular we want to
3941 * handle as much of the flow control as possible automatically. As
3942 * well as saving a few CPU cycles it will also greatly improve flow
3943 * control reliability.
3944 */
3945 if (tiosp->c_iflag & IXON) {
3946 mr0 |= MR0_SWFTX | MR0_SWFT;
3947 imron |= IR_XONXOFF;
3948 } else
3949 imroff |= IR_XONXOFF;
3950
3951 if (tiosp->c_iflag & IXOFF)
3952 mr0 |= MR0_SWFRX;
3953
3954 if (tiosp->c_cflag & CRTSCTS) {
3955 mr2 |= MR2_AUTOCTS;
3956 mr1 |= MR1_AUTORTS;
3957 }
3958
3959 /*
3960 * All sc26198 register values calculated so go through and set
3961 * them all up.
3962 */
3963
3964 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3965 portp->portnr, portp->panelnr, portp->brdnr);
3966 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3967 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3968 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3969 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3970 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3971
3972 spin_lock_irqsave(&brd_lock, flags);
3973 BRDENABLE(portp->brdnr, portp->pagenr);
3974 stl_sc26198setreg(portp, IMR, 0);
3975 stl_sc26198updatereg(portp, MR0, mr0);
3976 stl_sc26198updatereg(portp, MR1, mr1);
3977 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3978 stl_sc26198updatereg(portp, MR2, mr2);
3979 stl_sc26198updatereg(portp, IOPIOR,
3980 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3981
3982 if (baudrate > 0) {
3983 stl_sc26198setreg(portp, TXCSR, clk);
3984 stl_sc26198setreg(portp, RXCSR, clk);
3985 }
3986
3987 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3988 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3989
3990 ipr = stl_sc26198getreg(portp, IPR);
3991 if (ipr & IPR_DCD)
3992 portp->sigs &= ~TIOCM_CD;
3993 else
3994 portp->sigs |= TIOCM_CD;
3995
3996 portp->imr = (portp->imr & ~imroff) | imron;
3997 stl_sc26198setreg(portp, IMR, portp->imr);
3998 BRDDISABLE(portp->brdnr);
3999 spin_unlock_irqrestore(&brd_lock, flags);
4000 }
4001
4002 /*****************************************************************************/
4003
4004 /*
4005 * Set the state of the DTR and RTS signals.
4006 */
4007
4008 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4009 {
4010 unsigned char iopioron, iopioroff;
4011 unsigned long flags;
4012
4013 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4014 dtr, rts);
4015
4016 iopioron = 0;
4017 iopioroff = 0;
4018 if (dtr == 0)
4019 iopioroff |= IPR_DTR;
4020 else if (dtr > 0)
4021 iopioron |= IPR_DTR;
4022 if (rts == 0)
4023 iopioroff |= IPR_RTS;
4024 else if (rts > 0)
4025 iopioron |= IPR_RTS;
4026
4027 spin_lock_irqsave(&brd_lock, flags);
4028 BRDENABLE(portp->brdnr, portp->pagenr);
4029 stl_sc26198setreg(portp, IOPIOR,
4030 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4031 BRDDISABLE(portp->brdnr);
4032 spin_unlock_irqrestore(&brd_lock, flags);
4033 }
4034
4035 /*****************************************************************************/
4036
4037 /*
4038 * Return the state of the signals.
4039 */
4040
4041 static int stl_sc26198getsignals(struct stlport *portp)
4042 {
4043 unsigned char ipr;
4044 unsigned long flags;
4045 int sigs;
4046
4047 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4048
4049 spin_lock_irqsave(&brd_lock, flags);
4050 BRDENABLE(portp->brdnr, portp->pagenr);
4051 ipr = stl_sc26198getreg(portp, IPR);
4052 BRDDISABLE(portp->brdnr);
4053 spin_unlock_irqrestore(&brd_lock, flags);
4054
4055 sigs = 0;
4056 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4057 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4058 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4059 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4060 sigs |= TIOCM_DSR;
4061 return sigs;
4062 }
4063
4064 /*****************************************************************************/
4065
4066 /*
4067 * Enable/Disable the Transmitter and/or Receiver.
4068 */
4069
4070 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4071 {
4072 unsigned char ccr;
4073 unsigned long flags;
4074
4075 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4076
4077 ccr = portp->crenable;
4078 if (tx == 0)
4079 ccr &= ~CR_TXENABLE;
4080 else if (tx > 0)
4081 ccr |= CR_TXENABLE;
4082 if (rx == 0)
4083 ccr &= ~CR_RXENABLE;
4084 else if (rx > 0)
4085 ccr |= CR_RXENABLE;
4086
4087 spin_lock_irqsave(&brd_lock, flags);
4088 BRDENABLE(portp->brdnr, portp->pagenr);
4089 stl_sc26198setreg(portp, SCCR, ccr);
4090 BRDDISABLE(portp->brdnr);
4091 portp->crenable = ccr;
4092 spin_unlock_irqrestore(&brd_lock, flags);
4093 }
4094
4095 /*****************************************************************************/
4096
4097 /*
4098 * Start/stop the Transmitter and/or Receiver.
4099 */
4100
4101 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4102 {
4103 unsigned char imr;
4104 unsigned long flags;
4105
4106 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4107
4108 imr = portp->imr;
4109 if (tx == 0)
4110 imr &= ~IR_TXRDY;
4111 else if (tx == 1)
4112 imr |= IR_TXRDY;
4113 if (rx == 0)
4114 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4115 else if (rx > 0)
4116 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4117
4118 spin_lock_irqsave(&brd_lock, flags);
4119 BRDENABLE(portp->brdnr, portp->pagenr);
4120 stl_sc26198setreg(portp, IMR, imr);
4121 BRDDISABLE(portp->brdnr);
4122 portp->imr = imr;
4123 if (tx > 0)
4124 set_bit(ASYI_TXBUSY, &portp->istate);
4125 spin_unlock_irqrestore(&brd_lock, flags);
4126 }
4127
4128 /*****************************************************************************/
4129
4130 /*
4131 * Disable all interrupts from this port.
4132 */
4133
4134 static void stl_sc26198disableintrs(struct stlport *portp)
4135 {
4136 unsigned long flags;
4137
4138 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4139
4140 spin_lock_irqsave(&brd_lock, flags);
4141 BRDENABLE(portp->brdnr, portp->pagenr);
4142 portp->imr = 0;
4143 stl_sc26198setreg(portp, IMR, 0);
4144 BRDDISABLE(portp->brdnr);
4145 spin_unlock_irqrestore(&brd_lock, flags);
4146 }
4147
4148 /*****************************************************************************/
4149
4150 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4151 {
4152 unsigned long flags;
4153
4154 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4155
4156 spin_lock_irqsave(&brd_lock, flags);
4157 BRDENABLE(portp->brdnr, portp->pagenr);
4158 if (len == 1) {
4159 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4160 portp->stats.txbreaks++;
4161 } else
4162 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4163
4164 BRDDISABLE(portp->brdnr);
4165 spin_unlock_irqrestore(&brd_lock, flags);
4166 }
4167
4168 /*****************************************************************************/
4169
4170 /*
4171 * Take flow control actions...
4172 */
4173
4174 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4175 {
4176 struct tty_struct *tty;
4177 unsigned long flags;
4178 unsigned char mr0;
4179
4180 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4181
4182 if (portp == NULL)
4183 return;
4184 tty = portp->tty;
4185 if (tty == NULL)
4186 return;
4187
4188 spin_lock_irqsave(&brd_lock, flags);
4189 BRDENABLE(portp->brdnr, portp->pagenr);
4190
4191 if (state) {
4192 if (tty->termios->c_iflag & IXOFF) {
4193 mr0 = stl_sc26198getreg(portp, MR0);
4194 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4195 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4196 mr0 |= MR0_SWFRX;
4197 portp->stats.rxxon++;
4198 stl_sc26198wait(portp);
4199 stl_sc26198setreg(portp, MR0, mr0);
4200 }
4201 /*
4202 * Question: should we return RTS to what it was before? It may
4203 * have been set by an ioctl... Suppose not, since if you have
4204 * hardware flow control set then it is pretty silly to go and
4205 * set the RTS line by hand.
4206 */
4207 if (tty->termios->c_cflag & CRTSCTS) {
4208 stl_sc26198setreg(portp, MR1,
4209 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4210 stl_sc26198setreg(portp, IOPIOR,
4211 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4212 portp->stats.rxrtson++;
4213 }
4214 } else {
4215 if (tty->termios->c_iflag & IXOFF) {
4216 mr0 = stl_sc26198getreg(portp, MR0);
4217 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4218 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4219 mr0 &= ~MR0_SWFRX;
4220 portp->stats.rxxoff++;
4221 stl_sc26198wait(portp);
4222 stl_sc26198setreg(portp, MR0, mr0);
4223 }
4224 if (tty->termios->c_cflag & CRTSCTS) {
4225 stl_sc26198setreg(portp, MR1,
4226 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4227 stl_sc26198setreg(portp, IOPIOR,
4228 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4229 portp->stats.rxrtsoff++;
4230 }
4231 }
4232
4233 BRDDISABLE(portp->brdnr);
4234 spin_unlock_irqrestore(&brd_lock, flags);
4235 }
4236
4237 /*****************************************************************************/
4238
4239 /*
4240 * Send a flow control character.
4241 */
4242
4243 static void stl_sc26198sendflow(struct stlport *portp, int state)
4244 {
4245 struct tty_struct *tty;
4246 unsigned long flags;
4247 unsigned char mr0;
4248
4249 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4250
4251 if (portp == NULL)
4252 return;
4253 tty = portp->tty;
4254 if (tty == NULL)
4255 return;
4256
4257 spin_lock_irqsave(&brd_lock, flags);
4258 BRDENABLE(portp->brdnr, portp->pagenr);
4259 if (state) {
4260 mr0 = stl_sc26198getreg(portp, MR0);
4261 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4262 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4263 mr0 |= MR0_SWFRX;
4264 portp->stats.rxxon++;
4265 stl_sc26198wait(portp);
4266 stl_sc26198setreg(portp, MR0, mr0);
4267 } else {
4268 mr0 = stl_sc26198getreg(portp, MR0);
4269 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4270 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4271 mr0 &= ~MR0_SWFRX;
4272 portp->stats.rxxoff++;
4273 stl_sc26198wait(portp);
4274 stl_sc26198setreg(portp, MR0, mr0);
4275 }
4276 BRDDISABLE(portp->brdnr);
4277 spin_unlock_irqrestore(&brd_lock, flags);
4278 }
4279
4280 /*****************************************************************************/
4281
4282 static void stl_sc26198flush(struct stlport *portp)
4283 {
4284 unsigned long flags;
4285
4286 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4287
4288 if (portp == NULL)
4289 return;
4290
4291 spin_lock_irqsave(&brd_lock, flags);
4292 BRDENABLE(portp->brdnr, portp->pagenr);
4293 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4294 stl_sc26198setreg(portp, SCCR, portp->crenable);
4295 BRDDISABLE(portp->brdnr);
4296 portp->tx.tail = portp->tx.head;
4297 spin_unlock_irqrestore(&brd_lock, flags);
4298 }
4299
4300 /*****************************************************************************/
4301
4302 /*
4303 * Return the current state of data flow on this port. This is only
4304 * really interresting when determining if data has fully completed
4305 * transmission or not... The sc26198 interrupt scheme cannot
4306 * determine when all data has actually drained, so we need to
4307 * check the port statusy register to be sure.
4308 */
4309
4310 static int stl_sc26198datastate(struct stlport *portp)
4311 {
4312 unsigned long flags;
4313 unsigned char sr;
4314
4315 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4316
4317 if (portp == NULL)
4318 return 0;
4319 if (test_bit(ASYI_TXBUSY, &portp->istate))
4320 return 1;
4321
4322 spin_lock_irqsave(&brd_lock, flags);
4323 BRDENABLE(portp->brdnr, portp->pagenr);
4324 sr = stl_sc26198getreg(portp, SR);
4325 BRDDISABLE(portp->brdnr);
4326 spin_unlock_irqrestore(&brd_lock, flags);
4327
4328 return (sr & SR_TXEMPTY) ? 0 : 1;
4329 }
4330
4331 /*****************************************************************************/
4332
4333 /*
4334 * Delay for a small amount of time, to give the sc26198 a chance
4335 * to process a command...
4336 */
4337
4338 static void stl_sc26198wait(struct stlport *portp)
4339 {
4340 int i;
4341
4342 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4343
4344 if (portp == NULL)
4345 return;
4346
4347 for (i = 0; i < 20; i++)
4348 stl_sc26198getglobreg(portp, TSTR);
4349 }
4350
4351 /*****************************************************************************/
4352
4353 /*
4354 * If we are TX flow controlled and in IXANY mode then we may
4355 * need to unflow control here. We gotta do this because of the
4356 * automatic flow control modes of the sc26198.
4357 */
4358
4359 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4360 {
4361 unsigned char mr0;
4362
4363 mr0 = stl_sc26198getreg(portp, MR0);
4364 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4365 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4366 stl_sc26198wait(portp);
4367 stl_sc26198setreg(portp, MR0, mr0);
4368 clear_bit(ASYI_TXFLOWED, &portp->istate);
4369 }
4370
4371 /*****************************************************************************/
4372
4373 /*
4374 * Interrupt service routine for sc26198 panels.
4375 */
4376
4377 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4378 {
4379 struct stlport *portp;
4380 unsigned int iack;
4381
4382 spin_lock(&brd_lock);
4383
4384 /*
4385 * Work around bug in sc26198 chip... Cannot have A6 address
4386 * line of UART high, else iack will be returned as 0.
4387 */
4388 outb(0, (iobase + 1));
4389
4390 iack = inb(iobase + XP_IACK);
4391 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4392
4393 if (iack & IVR_RXDATA)
4394 stl_sc26198rxisr(portp, iack);
4395 else if (iack & IVR_TXDATA)
4396 stl_sc26198txisr(portp);
4397 else
4398 stl_sc26198otherisr(portp, iack);
4399
4400 spin_unlock(&brd_lock);
4401 }
4402
4403 /*****************************************************************************/
4404
4405 /*
4406 * Transmit interrupt handler. This has gotta be fast! Handling TX
4407 * chars is pretty simple, stuff as many as possible from the TX buffer
4408 * into the sc26198 FIFO.
4409 * In practice it is possible that interrupts are enabled but that the
4410 * port has been hung up. Need to handle not having any TX buffer here,
4411 * this is done by using the side effect that head and tail will also
4412 * be NULL if the buffer has been freed.
4413 */
4414
4415 static void stl_sc26198txisr(struct stlport *portp)
4416 {
4417 unsigned int ioaddr;
4418 unsigned char mr0;
4419 int len, stlen;
4420 char *head, *tail;
4421
4422 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4423
4424 ioaddr = portp->ioaddr;
4425 head = portp->tx.head;
4426 tail = portp->tx.tail;
4427 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4428 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4429 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4430 set_bit(ASYI_TXLOW, &portp->istate);
4431 if (portp->tty)
4432 tty_wakeup(portp->tty);
4433 }
4434
4435 if (len == 0) {
4436 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4437 mr0 = inb(ioaddr + XP_DATA);
4438 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4439 portp->imr &= ~IR_TXRDY;
4440 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4441 outb(portp->imr, (ioaddr + XP_DATA));
4442 clear_bit(ASYI_TXBUSY, &portp->istate);
4443 } else {
4444 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4445 outb(mr0, (ioaddr + XP_DATA));
4446 }
4447 } else {
4448 len = min(len, SC26198_TXFIFOSIZE);
4449 portp->stats.txtotal += len;
4450 stlen = min_t(unsigned int, len,
4451 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4452 outb(GTXFIFO, (ioaddr + XP_ADDR));
4453 outsb((ioaddr + XP_DATA), tail, stlen);
4454 len -= stlen;
4455 tail += stlen;
4456 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4457 tail = portp->tx.buf;
4458 if (len > 0) {
4459 outsb((ioaddr + XP_DATA), tail, len);
4460 tail += len;
4461 }
4462 portp->tx.tail = tail;
4463 }
4464 }
4465
4466 /*****************************************************************************/
4467
4468 /*
4469 * Receive character interrupt handler. Determine if we have good chars
4470 * or bad chars and then process appropriately. Good chars are easy
4471 * just shove the lot into the RX buffer and set all status byte to 0.
4472 * If a bad RX char then process as required. This routine needs to be
4473 * fast! In practice it is possible that we get an interrupt on a port
4474 * that is closed. This can happen on hangups - since they completely
4475 * shutdown a port not in user context. Need to handle this case.
4476 */
4477
4478 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4479 {
4480 struct tty_struct *tty;
4481 unsigned int len, buflen, ioaddr;
4482
4483 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4484
4485 tty = portp->tty;
4486 ioaddr = portp->ioaddr;
4487 outb(GIBCR, (ioaddr + XP_ADDR));
4488 len = inb(ioaddr + XP_DATA) + 1;
4489
4490 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4491 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4492 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4493 outb(GRXFIFO, (ioaddr + XP_ADDR));
4494 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4495 portp->stats.rxlost += len;
4496 portp->stats.rxtotal += len;
4497 } else {
4498 len = min(len, buflen);
4499 if (len > 0) {
4500 unsigned char *ptr;
4501 outb(GRXFIFO, (ioaddr + XP_ADDR));
4502 tty_prepare_flip_string(tty, &ptr, len);
4503 insb((ioaddr + XP_DATA), ptr, len);
4504 tty_schedule_flip(tty);
4505 portp->stats.rxtotal += len;
4506 }
4507 }
4508 } else {
4509 stl_sc26198rxbadchars(portp);
4510 }
4511
4512 /*
4513 * If we are TX flow controlled and in IXANY mode then we may need
4514 * to unflow control here. We gotta do this because of the automatic
4515 * flow control modes of the sc26198.
4516 */
4517 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4518 if ((tty != NULL) &&
4519 (tty->termios != NULL) &&
4520 (tty->termios->c_iflag & IXANY)) {
4521 stl_sc26198txunflow(portp, tty);
4522 }
4523 }
4524 }
4525
4526 /*****************************************************************************/
4527
4528 /*
4529 * Process an RX bad character.
4530 */
4531
4532 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4533 {
4534 struct tty_struct *tty;
4535 unsigned int ioaddr;
4536
4537 tty = portp->tty;
4538 ioaddr = portp->ioaddr;
4539
4540 if (status & SR_RXPARITY)
4541 portp->stats.rxparity++;
4542 if (status & SR_RXFRAMING)
4543 portp->stats.rxframing++;
4544 if (status & SR_RXOVERRUN)
4545 portp->stats.rxoverrun++;
4546 if (status & SR_RXBREAK)
4547 portp->stats.rxbreaks++;
4548
4549 if ((tty != NULL) &&
4550 ((portp->rxignoremsk & status) == 0)) {
4551 if (portp->rxmarkmsk & status) {
4552 if (status & SR_RXBREAK) {
4553 status = TTY_BREAK;
4554 if (portp->flags & ASYNC_SAK) {
4555 do_SAK(tty);
4556 BRDENABLE(portp->brdnr, portp->pagenr);
4557 }
4558 } else if (status & SR_RXPARITY)
4559 status = TTY_PARITY;
4560 else if (status & SR_RXFRAMING)
4561 status = TTY_FRAME;
4562 else if(status & SR_RXOVERRUN)
4563 status = TTY_OVERRUN;
4564 else
4565 status = 0;
4566 } else
4567 status = 0;
4568
4569 tty_insert_flip_char(tty, ch, status);
4570 tty_schedule_flip(tty);
4571
4572 if (status == 0)
4573 portp->stats.rxtotal++;
4574 }
4575 }
4576
4577 /*****************************************************************************/
4578
4579 /*
4580 * Process all characters in the RX FIFO of the UART. Check all char
4581 * status bytes as well, and process as required. We need to check
4582 * all bytes in the FIFO, in case some more enter the FIFO while we
4583 * are here. To get the exact character error type we need to switch
4584 * into CHAR error mode (that is why we need to make sure we empty
4585 * the FIFO).
4586 */
4587
4588 static void stl_sc26198rxbadchars(struct stlport *portp)
4589 {
4590 unsigned char status, mr1;
4591 char ch;
4592
4593 /*
4594 * To get the precise error type for each character we must switch
4595 * back into CHAR error mode.
4596 */
4597 mr1 = stl_sc26198getreg(portp, MR1);
4598 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4599
4600 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4601 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4602 ch = stl_sc26198getreg(portp, RXFIFO);
4603 stl_sc26198rxbadch(portp, status, ch);
4604 }
4605
4606 /*
4607 * To get correct interrupt class we must switch back into BLOCK
4608 * error mode.
4609 */
4610 stl_sc26198setreg(portp, MR1, mr1);
4611 }
4612
4613 /*****************************************************************************/
4614
4615 /*
4616 * Other interrupt handler. This includes modem signals, flow
4617 * control actions, etc. Most stuff is left to off-level interrupt
4618 * processing time.
4619 */
4620
4621 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4622 {
4623 unsigned char cir, ipr, xisr;
4624
4625 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4626
4627 cir = stl_sc26198getglobreg(portp, CIR);
4628
4629 switch (cir & CIR_SUBTYPEMASK) {
4630 case CIR_SUBCOS:
4631 ipr = stl_sc26198getreg(portp, IPR);
4632 if (ipr & IPR_DCDCHANGE) {
4633 stl_cd_change(portp);
4634 portp->stats.modem++;
4635 }
4636 break;
4637 case CIR_SUBXONXOFF:
4638 xisr = stl_sc26198getreg(portp, XISR);
4639 if (xisr & XISR_RXXONGOT) {
4640 set_bit(ASYI_TXFLOWED, &portp->istate);
4641 portp->stats.txxoff++;
4642 }
4643 if (xisr & XISR_RXXOFFGOT) {
4644 clear_bit(ASYI_TXFLOWED, &portp->istate);
4645 portp->stats.txxon++;
4646 }
4647 break;
4648 case CIR_SUBBREAK:
4649 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4650 stl_sc26198rxbadchars(portp);
4651 break;
4652 default:
4653 break;
4654 }
4655 }
4656
4657 static void stl_free_isabrds(void)
4658 {
4659 struct stlbrd *brdp;
4660 unsigned int i;
4661
4662 for (i = 0; i < stl_nrbrds; i++) {
4663 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4664 continue;
4665
4666 free_irq(brdp->irq, brdp);
4667
4668 stl_cleanup_panels(brdp);
4669
4670 release_region(brdp->ioaddr1, brdp->iosize1);
4671 if (brdp->iosize2 > 0)
4672 release_region(brdp->ioaddr2, brdp->iosize2);
4673
4674 kfree(brdp);
4675 stl_brds[i] = NULL;
4676 }
4677 }
4678
4679 /*
4680 * Loadable module initialization stuff.
4681 */
4682 static int __init stallion_module_init(void)
4683 {
4684 struct stlbrd *brdp;
4685 struct stlconf conf;
4686 unsigned int i, j;
4687 int retval;
4688
4689 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4690
4691 spin_lock_init(&stallion_lock);
4692 spin_lock_init(&brd_lock);
4693
4694 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4695 if (!stl_serial) {
4696 retval = -ENOMEM;
4697 goto err;
4698 }
4699
4700 stl_serial->owner = THIS_MODULE;
4701 stl_serial->driver_name = stl_drvname;
4702 stl_serial->name = "ttyE";
4703 stl_serial->major = STL_SERIALMAJOR;
4704 stl_serial->minor_start = 0;
4705 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4706 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4707 stl_serial->init_termios = stl_deftermios;
4708 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4709 tty_set_operations(stl_serial, &stl_ops);
4710
4711 retval = tty_register_driver(stl_serial);
4712 if (retval) {
4713 printk("STALLION: failed to register serial driver\n");
4714 goto err_frtty;
4715 }
4716
4717 /*
4718 * Find any dynamically supported boards. That is via module load
4719 * line options.
4720 */
4721 for (i = stl_nrbrds; i < stl_nargs; i++) {
4722 memset(&conf, 0, sizeof(conf));
4723 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4724 continue;
4725 if ((brdp = stl_allocbrd()) == NULL)
4726 continue;
4727 brdp->brdnr = i;
4728 brdp->brdtype = conf.brdtype;
4729 brdp->ioaddr1 = conf.ioaddr1;
4730 brdp->ioaddr2 = conf.ioaddr2;
4731 brdp->irq = conf.irq;
4732 brdp->irqtype = conf.irqtype;
4733 stl_brds[brdp->brdnr] = brdp;
4734 if (stl_brdinit(brdp)) {
4735 stl_brds[brdp->brdnr] = NULL;
4736 kfree(brdp);
4737 } else {
4738 for (j = 0; j < brdp->nrports; j++)
4739 tty_register_device(stl_serial,
4740 brdp->brdnr * STL_MAXPORTS + j, NULL);
4741 stl_nrbrds = i + 1;
4742 }
4743 }
4744
4745 /* this has to be _after_ isa finding because of locking */
4746 retval = pci_register_driver(&stl_pcidriver);
4747 if (retval && stl_nrbrds == 0) {
4748 printk(KERN_ERR "STALLION: can't register pci driver\n");
4749 goto err_unrtty;
4750 }
4751
4752 /*
4753 * Set up a character driver for per board stuff. This is mainly used
4754 * to do stats ioctls on the ports.
4755 */
4756 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4757 printk("STALLION: failed to register serial board device\n");
4758
4759 stallion_class = class_create(THIS_MODULE, "staliomem");
4760 if (IS_ERR(stallion_class))
4761 printk("STALLION: failed to create class\n");
4762 for (i = 0; i < 4; i++)
4763 device_create(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4764 "staliomem%d", i);
4765
4766 return 0;
4767 err_unrtty:
4768 tty_unregister_driver(stl_serial);
4769 err_frtty:
4770 put_tty_driver(stl_serial);
4771 err:
4772 return retval;
4773 }
4774
4775 static void __exit stallion_module_exit(void)
4776 {
4777 struct stlbrd *brdp;
4778 unsigned int i, j;
4779
4780 pr_debug("cleanup_module()\n");
4781
4782 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4783 stl_drvversion);
4784
4785 /*
4786 * Free up all allocated resources used by the ports. This includes
4787 * memory and interrupts. As part of this process we will also do
4788 * a hangup on every open port - to try to flush out any processes
4789 * hanging onto ports.
4790 */
4791 for (i = 0; i < stl_nrbrds; i++) {
4792 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4793 continue;
4794 for (j = 0; j < brdp->nrports; j++)
4795 tty_unregister_device(stl_serial,
4796 brdp->brdnr * STL_MAXPORTS + j);
4797 }
4798
4799 for (i = 0; i < 4; i++)
4800 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4801 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4802 class_destroy(stallion_class);
4803
4804 pci_unregister_driver(&stl_pcidriver);
4805
4806 stl_free_isabrds();
4807
4808 tty_unregister_driver(stl_serial);
4809 put_tty_driver(stl_serial);
4810 }
4811
4812 module_init(stallion_module_init);
4813 module_exit(stallion_module_exit);
4814
4815 MODULE_AUTHOR("Greg Ungerer");
4816 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4817 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards