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[deliverable/linux.git] / drivers / char / stallion.c
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_DCDCHANGE 3
149 #define ASYI_TXFLOWED 4
150
151 /*
152 * Define an array of board names as printable strings. Handy for
153 * referencing boards when printing trace and stuff.
154 */
155 static char *stl_brdnames[] = {
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 NULL,
176 "EasyIO",
177 "EC8/32-AT",
178 "EC8/32-MC",
179 NULL,
180 NULL,
181 NULL,
182 "EC8/32-PCI",
183 "EC8/64-PCI",
184 "EasyIO-PCI",
185 };
186
187 /*****************************************************************************/
188
189 /*
190 * Define some string labels for arguments passed from the module
191 * load line. These allow for easy board definitions, and easy
192 * modification of the io, memory and irq resoucres.
193 */
194 static unsigned int stl_nargs;
195 static char *board0[4];
196 static char *board1[4];
197 static char *board2[4];
198 static char *board3[4];
199
200 static char **stl_brdsp[] = {
201 (char **) &board0,
202 (char **) &board1,
203 (char **) &board2,
204 (char **) &board3
205 };
206
207 /*
208 * Define a set of common board names, and types. This is used to
209 * parse any module arguments.
210 */
211
212 static struct {
213 char *name;
214 int type;
215 } stl_brdstr[] = {
216 { "easyio", BRD_EASYIO },
217 { "eio", BRD_EASYIO },
218 { "20", BRD_EASYIO },
219 { "ec8/32", BRD_ECH },
220 { "ec8/32-at", BRD_ECH },
221 { "ec8/32-isa", BRD_ECH },
222 { "ech", BRD_ECH },
223 { "echat", BRD_ECH },
224 { "21", BRD_ECH },
225 { "ec8/32-mc", BRD_ECHMC },
226 { "ec8/32-mca", BRD_ECHMC },
227 { "echmc", BRD_ECHMC },
228 { "echmca", BRD_ECHMC },
229 { "22", BRD_ECHMC },
230 { "ec8/32-pc", BRD_ECHPCI },
231 { "ec8/32-pci", BRD_ECHPCI },
232 { "26", BRD_ECHPCI },
233 { "ec8/64-pc", BRD_ECH64PCI },
234 { "ec8/64-pci", BRD_ECH64PCI },
235 { "ech-pci", BRD_ECH64PCI },
236 { "echpci", BRD_ECH64PCI },
237 { "echpc", BRD_ECH64PCI },
238 { "27", BRD_ECH64PCI },
239 { "easyio-pc", BRD_EASYIOPCI },
240 { "easyio-pci", BRD_EASYIOPCI },
241 { "eio-pci", BRD_EASYIOPCI },
242 { "eiopci", BRD_EASYIOPCI },
243 { "28", BRD_EASYIOPCI },
244 };
245
246 /*
247 * Define the module agruments.
248 */
249
250 module_param_array(board0, charp, &stl_nargs, 0);
251 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
252 module_param_array(board1, charp, &stl_nargs, 0);
253 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
254 module_param_array(board2, charp, &stl_nargs, 0);
255 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
256 module_param_array(board3, charp, &stl_nargs, 0);
257 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
258
259 /*****************************************************************************/
260
261 /*
262 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
263 * to the directly accessible io ports of these boards (not the uarts -
264 * they are in cd1400.h and sc26198.h).
265 */
266 #define EIO_8PORTRS 0x04
267 #define EIO_4PORTRS 0x05
268 #define EIO_8PORTDI 0x00
269 #define EIO_8PORTM 0x06
270 #define EIO_MK3 0x03
271 #define EIO_IDBITMASK 0x07
272
273 #define EIO_BRDMASK 0xf0
274 #define ID_BRD4 0x10
275 #define ID_BRD8 0x20
276 #define ID_BRD16 0x30
277
278 #define EIO_INTRPEND 0x08
279 #define EIO_INTEDGE 0x00
280 #define EIO_INTLEVEL 0x08
281 #define EIO_0WS 0x10
282
283 #define ECH_ID 0xa0
284 #define ECH_IDBITMASK 0xe0
285 #define ECH_BRDENABLE 0x08
286 #define ECH_BRDDISABLE 0x00
287 #define ECH_INTENABLE 0x01
288 #define ECH_INTDISABLE 0x00
289 #define ECH_INTLEVEL 0x02
290 #define ECH_INTEDGE 0x00
291 #define ECH_INTRPEND 0x01
292 #define ECH_BRDRESET 0x01
293
294 #define ECHMC_INTENABLE 0x01
295 #define ECHMC_BRDRESET 0x02
296
297 #define ECH_PNLSTATUS 2
298 #define ECH_PNL16PORT 0x20
299 #define ECH_PNLIDMASK 0x07
300 #define ECH_PNLXPID 0x40
301 #define ECH_PNLINTRPEND 0x80
302
303 #define ECH_ADDR2MASK 0x1e0
304
305 /*
306 * Define the vector mapping bits for the programmable interrupt board
307 * hardware. These bits encode the interrupt for the board to use - it
308 * is software selectable (except the EIO-8M).
309 */
310 static unsigned char stl_vecmap[] = {
311 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
312 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
313 };
314
315 /*
316 * Lock ordering is that you may not take stallion_lock holding
317 * brd_lock.
318 */
319
320 static spinlock_t brd_lock; /* Guard the board mapping */
321 static spinlock_t stallion_lock; /* Guard the tty driver */
322
323 /*
324 * Set up enable and disable macros for the ECH boards. They require
325 * the secondary io address space to be activated and deactivated.
326 * This way all ECH boards can share their secondary io region.
327 * If this is an ECH-PCI board then also need to set the page pointer
328 * to point to the correct page.
329 */
330 #define BRDENABLE(brdnr,pagenr) \
331 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
332 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
333 stl_brds[(brdnr)]->ioctrl); \
334 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
335 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
336
337 #define BRDDISABLE(brdnr) \
338 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
339 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
340 stl_brds[(brdnr)]->ioctrl);
341
342 #define STL_CD1400MAXBAUD 230400
343 #define STL_SC26198MAXBAUD 460800
344
345 #define STL_BAUDBASE 115200
346 #define STL_CLOSEDELAY (5 * HZ / 10)
347
348 /*****************************************************************************/
349
350 /*
351 * Define the Stallion PCI vendor and device IDs.
352 */
353 #ifndef PCI_VENDOR_ID_STALLION
354 #define PCI_VENDOR_ID_STALLION 0x124d
355 #endif
356 #ifndef PCI_DEVICE_ID_ECHPCI832
357 #define PCI_DEVICE_ID_ECHPCI832 0x0000
358 #endif
359 #ifndef PCI_DEVICE_ID_ECHPCI864
360 #define PCI_DEVICE_ID_ECHPCI864 0x0002
361 #endif
362 #ifndef PCI_DEVICE_ID_EIOPCI
363 #define PCI_DEVICE_ID_EIOPCI 0x0003
364 #endif
365
366 /*
367 * Define structure to hold all Stallion PCI boards.
368 */
369
370 static struct pci_device_id stl_pcibrds[] = {
371 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
372 .driver_data = BRD_ECH64PCI },
373 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
374 .driver_data = BRD_EASYIOPCI },
375 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
376 .driver_data = BRD_ECHPCI },
377 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
378 .driver_data = BRD_ECHPCI },
379 { }
380 };
381 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
382
383 /*****************************************************************************/
384
385 /*
386 * Define macros to extract a brd/port number from a minor number.
387 */
388 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
389 #define MINOR2PORT(min) ((min) & 0x3f)
390
391 /*
392 * Define a baud rate table that converts termios baud rate selector
393 * into the actual baud rate value. All baud rate calculations are
394 * based on the actual baud rate required.
395 */
396 static unsigned int stl_baudrates[] = {
397 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
398 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
399 };
400
401 /*****************************************************************************/
402
403 /*
404 * Declare all those functions in this driver!
405 */
406
407 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
408 static int stl_brdinit(struct stlbrd *brdp);
409 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
410 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
411 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
412
413 /*
414 * CD1400 uart specific handling functions.
415 */
416 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
417 static int stl_cd1400getreg(struct stlport *portp, int regnr);
418 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
419 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
420 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
421 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
422 static int stl_cd1400getsignals(struct stlport *portp);
423 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
424 static void stl_cd1400ccrwait(struct stlport *portp);
425 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
426 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
427 static void stl_cd1400disableintrs(struct stlport *portp);
428 static void stl_cd1400sendbreak(struct stlport *portp, int len);
429 static void stl_cd1400flowctrl(struct stlport *portp, int state);
430 static void stl_cd1400sendflow(struct stlport *portp, int state);
431 static void stl_cd1400flush(struct stlport *portp);
432 static int stl_cd1400datastate(struct stlport *portp);
433 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
434 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
435 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
436 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
437 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
438
439 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
440
441 /*
442 * SC26198 uart specific handling functions.
443 */
444 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
445 static int stl_sc26198getreg(struct stlport *portp, int regnr);
446 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
447 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
448 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
449 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
450 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
451 static int stl_sc26198getsignals(struct stlport *portp);
452 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
453 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
454 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
455 static void stl_sc26198disableintrs(struct stlport *portp);
456 static void stl_sc26198sendbreak(struct stlport *portp, int len);
457 static void stl_sc26198flowctrl(struct stlport *portp, int state);
458 static void stl_sc26198sendflow(struct stlport *portp, int state);
459 static void stl_sc26198flush(struct stlport *portp);
460 static int stl_sc26198datastate(struct stlport *portp);
461 static void stl_sc26198wait(struct stlport *portp);
462 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
463 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
464 static void stl_sc26198txisr(struct stlport *port);
465 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
466 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
467 static void stl_sc26198rxbadchars(struct stlport *portp);
468 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
469
470 /*****************************************************************************/
471
472 /*
473 * Generic UART support structure.
474 */
475 typedef struct uart {
476 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
477 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
478 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
479 int (*getsignals)(struct stlport *portp);
480 void (*setsignals)(struct stlport *portp, int dtr, int rts);
481 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
482 void (*startrxtx)(struct stlport *portp, int rx, int tx);
483 void (*disableintrs)(struct stlport *portp);
484 void (*sendbreak)(struct stlport *portp, int len);
485 void (*flowctrl)(struct stlport *portp, int state);
486 void (*sendflow)(struct stlport *portp, int state);
487 void (*flush)(struct stlport *portp);
488 int (*datastate)(struct stlport *portp);
489 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
490 } uart_t;
491
492 /*
493 * Define some macros to make calling these functions nice and clean.
494 */
495 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
496 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
497 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
498 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
499 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
500 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
501 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
502 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
503 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
504 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
505 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
506 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
507 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
508
509 /*****************************************************************************/
510
511 /*
512 * CD1400 UART specific data initialization.
513 */
514 static uart_t stl_cd1400uart = {
515 stl_cd1400panelinit,
516 stl_cd1400portinit,
517 stl_cd1400setport,
518 stl_cd1400getsignals,
519 stl_cd1400setsignals,
520 stl_cd1400enablerxtx,
521 stl_cd1400startrxtx,
522 stl_cd1400disableintrs,
523 stl_cd1400sendbreak,
524 stl_cd1400flowctrl,
525 stl_cd1400sendflow,
526 stl_cd1400flush,
527 stl_cd1400datastate,
528 stl_cd1400eiointr
529 };
530
531 /*
532 * Define the offsets within the register bank of a cd1400 based panel.
533 * These io address offsets are common to the EasyIO board as well.
534 */
535 #define EREG_ADDR 0
536 #define EREG_DATA 4
537 #define EREG_RXACK 5
538 #define EREG_TXACK 6
539 #define EREG_MDACK 7
540
541 #define EREG_BANKSIZE 8
542
543 #define CD1400_CLK 25000000
544 #define CD1400_CLK8M 20000000
545
546 /*
547 * Define the cd1400 baud rate clocks. These are used when calculating
548 * what clock and divisor to use for the required baud rate. Also
549 * define the maximum baud rate allowed, and the default base baud.
550 */
551 static int stl_cd1400clkdivs[] = {
552 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
553 };
554
555 /*****************************************************************************/
556
557 /*
558 * SC26198 UART specific data initization.
559 */
560 static uart_t stl_sc26198uart = {
561 stl_sc26198panelinit,
562 stl_sc26198portinit,
563 stl_sc26198setport,
564 stl_sc26198getsignals,
565 stl_sc26198setsignals,
566 stl_sc26198enablerxtx,
567 stl_sc26198startrxtx,
568 stl_sc26198disableintrs,
569 stl_sc26198sendbreak,
570 stl_sc26198flowctrl,
571 stl_sc26198sendflow,
572 stl_sc26198flush,
573 stl_sc26198datastate,
574 stl_sc26198intr
575 };
576
577 /*
578 * Define the offsets within the register bank of a sc26198 based panel.
579 */
580 #define XP_DATA 0
581 #define XP_ADDR 1
582 #define XP_MODID 2
583 #define XP_STATUS 2
584 #define XP_IACK 3
585
586 #define XP_BANKSIZE 4
587
588 /*
589 * Define the sc26198 baud rate table. Offsets within the table
590 * represent the actual baud rate selector of sc26198 registers.
591 */
592 static unsigned int sc26198_baudtable[] = {
593 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
594 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
595 230400, 460800, 921600
596 };
597
598 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
599
600 /*****************************************************************************/
601
602 /*
603 * Define the driver info for a user level control device. Used mainly
604 * to get at port stats - only not using the port device itself.
605 */
606 static const struct file_operations stl_fsiomem = {
607 .owner = THIS_MODULE,
608 .ioctl = stl_memioctl,
609 };
610
611 static struct class *stallion_class;
612
613 /*
614 * Check for any arguments passed in on the module load command line.
615 */
616
617 /*****************************************************************************/
618
619 /*
620 * Parse the supplied argument string, into the board conf struct.
621 */
622
623 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
624 {
625 char *sp;
626 unsigned int i;
627
628 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
629
630 if ((argp[0] == NULL) || (*argp[0] == 0))
631 return 0;
632
633 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
634 *sp = tolower(*sp);
635
636 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
637 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
638 break;
639
640 if (i == ARRAY_SIZE(stl_brdstr)) {
641 printk("STALLION: unknown board name, %s?\n", argp[0]);
642 return 0;
643 }
644
645 confp->brdtype = stl_brdstr[i].type;
646
647 i = 1;
648 if ((argp[i] != NULL) && (*argp[i] != 0))
649 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
650 i++;
651 if (confp->brdtype == BRD_ECH) {
652 if ((argp[i] != NULL) && (*argp[i] != 0))
653 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
654 i++;
655 }
656 if ((argp[i] != NULL) && (*argp[i] != 0))
657 confp->irq = simple_strtoul(argp[i], NULL, 0);
658 return 1;
659 }
660
661 /*****************************************************************************/
662
663 /*
664 * Allocate a new board structure. Fill out the basic info in it.
665 */
666
667 static struct stlbrd *stl_allocbrd(void)
668 {
669 struct stlbrd *brdp;
670
671 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
672 if (!brdp) {
673 printk("STALLION: failed to allocate memory (size=%Zd)\n",
674 sizeof(struct stlbrd));
675 return NULL;
676 }
677
678 brdp->magic = STL_BOARDMAGIC;
679 return brdp;
680 }
681
682 /*****************************************************************************/
683
684 static int stl_open(struct tty_struct *tty, struct file *filp)
685 {
686 struct stlport *portp;
687 struct stlbrd *brdp;
688 unsigned int minordev, brdnr, panelnr;
689 int portnr, rc;
690
691 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
692
693 minordev = tty->index;
694 brdnr = MINOR2BRD(minordev);
695 if (brdnr >= stl_nrbrds)
696 return -ENODEV;
697 brdp = stl_brds[brdnr];
698 if (brdp == NULL)
699 return -ENODEV;
700 minordev = MINOR2PORT(minordev);
701 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
702 if (brdp->panels[panelnr] == NULL)
703 break;
704 if (minordev < brdp->panels[panelnr]->nrports) {
705 portnr = minordev;
706 break;
707 }
708 minordev -= brdp->panels[panelnr]->nrports;
709 }
710 if (portnr < 0)
711 return -ENODEV;
712
713 portp = brdp->panels[panelnr]->ports[portnr];
714 if (portp == NULL)
715 return -ENODEV;
716
717 /*
718 * On the first open of the device setup the port hardware, and
719 * initialize the per port data structure.
720 */
721 portp->tty = tty;
722 tty->driver_data = portp;
723 portp->refcount++;
724
725 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
726 if (!portp->tx.buf) {
727 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
728 if (!portp->tx.buf)
729 return -ENOMEM;
730 portp->tx.head = portp->tx.buf;
731 portp->tx.tail = portp->tx.buf;
732 }
733 stl_setport(portp, tty->termios);
734 portp->sigs = stl_getsignals(portp);
735 stl_setsignals(portp, 1, 1);
736 stl_enablerxtx(portp, 1, 1);
737 stl_startrxtx(portp, 1, 0);
738 clear_bit(TTY_IO_ERROR, &tty->flags);
739 portp->flags |= ASYNC_INITIALIZED;
740 }
741
742 /*
743 * Check if this port is in the middle of closing. If so then wait
744 * until it is closed then return error status, based on flag settings.
745 * The sleep here does not need interrupt protection since the wakeup
746 * for it is done with the same context.
747 */
748 if (portp->flags & ASYNC_CLOSING) {
749 interruptible_sleep_on(&portp->close_wait);
750 if (portp->flags & ASYNC_HUP_NOTIFY)
751 return -EAGAIN;
752 return -ERESTARTSYS;
753 }
754
755 /*
756 * Based on type of open being done check if it can overlap with any
757 * previous opens still in effect. If we are a normal serial device
758 * then also we might have to wait for carrier.
759 */
760 if (!(filp->f_flags & O_NONBLOCK))
761 if ((rc = stl_waitcarrier(portp, filp)) != 0)
762 return rc;
763
764 portp->flags |= ASYNC_NORMAL_ACTIVE;
765
766 return 0;
767 }
768
769 /*****************************************************************************/
770
771 /*
772 * Possibly need to wait for carrier (DCD signal) to come high. Say
773 * maybe because if we are clocal then we don't need to wait...
774 */
775
776 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
777 {
778 unsigned long flags;
779 int rc, doclocal;
780
781 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
782
783 rc = 0;
784 doclocal = 0;
785
786 spin_lock_irqsave(&stallion_lock, flags);
787
788 if (portp->tty->termios->c_cflag & CLOCAL)
789 doclocal++;
790
791 portp->openwaitcnt++;
792 if (! tty_hung_up_p(filp))
793 portp->refcount--;
794
795 for (;;) {
796 /* Takes brd_lock internally */
797 stl_setsignals(portp, 1, 1);
798 if (tty_hung_up_p(filp) ||
799 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
800 if (portp->flags & ASYNC_HUP_NOTIFY)
801 rc = -EBUSY;
802 else
803 rc = -ERESTARTSYS;
804 break;
805 }
806 if (((portp->flags & ASYNC_CLOSING) == 0) &&
807 (doclocal || (portp->sigs & TIOCM_CD)))
808 break;
809 if (signal_pending(current)) {
810 rc = -ERESTARTSYS;
811 break;
812 }
813 /* FIXME */
814 interruptible_sleep_on(&portp->open_wait);
815 }
816
817 if (! tty_hung_up_p(filp))
818 portp->refcount++;
819 portp->openwaitcnt--;
820 spin_unlock_irqrestore(&stallion_lock, flags);
821
822 return rc;
823 }
824
825 /*****************************************************************************/
826
827 static void stl_flushbuffer(struct tty_struct *tty)
828 {
829 struct stlport *portp;
830
831 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
832
833 if (tty == NULL)
834 return;
835 portp = tty->driver_data;
836 if (portp == NULL)
837 return;
838
839 stl_flush(portp);
840 tty_wakeup(tty);
841 }
842
843 /*****************************************************************************/
844
845 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
846 {
847 struct stlport *portp;
848 unsigned long tend;
849
850 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
851
852 if (tty == NULL)
853 return;
854 portp = tty->driver_data;
855 if (portp == NULL)
856 return;
857
858 if (timeout == 0)
859 timeout = HZ;
860 tend = jiffies + timeout;
861
862 while (stl_datastate(portp)) {
863 if (signal_pending(current))
864 break;
865 msleep_interruptible(20);
866 if (time_after_eq(jiffies, tend))
867 break;
868 }
869 }
870
871 /*****************************************************************************/
872
873 static void stl_close(struct tty_struct *tty, struct file *filp)
874 {
875 struct stlport *portp;
876 unsigned long flags;
877
878 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
879
880 portp = tty->driver_data;
881 if (portp == NULL)
882 return;
883
884 spin_lock_irqsave(&stallion_lock, flags);
885 if (tty_hung_up_p(filp)) {
886 spin_unlock_irqrestore(&stallion_lock, flags);
887 return;
888 }
889 if ((tty->count == 1) && (portp->refcount != 1))
890 portp->refcount = 1;
891 if (portp->refcount-- > 1) {
892 spin_unlock_irqrestore(&stallion_lock, flags);
893 return;
894 }
895
896 portp->refcount = 0;
897 portp->flags |= ASYNC_CLOSING;
898
899 /*
900 * May want to wait for any data to drain before closing. The BUSY
901 * flag keeps track of whether we are still sending or not - it is
902 * very accurate for the cd1400, not quite so for the sc26198.
903 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
904 */
905 tty->closing = 1;
906
907 spin_unlock_irqrestore(&stallion_lock, flags);
908
909 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
910 tty_wait_until_sent(tty, portp->closing_wait);
911 stl_waituntilsent(tty, (HZ / 2));
912
913
914 spin_lock_irqsave(&stallion_lock, flags);
915 portp->flags &= ~ASYNC_INITIALIZED;
916 spin_unlock_irqrestore(&stallion_lock, flags);
917
918 stl_disableintrs(portp);
919 if (tty->termios->c_cflag & HUPCL)
920 stl_setsignals(portp, 0, 0);
921 stl_enablerxtx(portp, 0, 0);
922 stl_flushbuffer(tty);
923 portp->istate = 0;
924 if (portp->tx.buf != NULL) {
925 kfree(portp->tx.buf);
926 portp->tx.buf = NULL;
927 portp->tx.head = NULL;
928 portp->tx.tail = NULL;
929 }
930 set_bit(TTY_IO_ERROR, &tty->flags);
931 tty_ldisc_flush(tty);
932
933 tty->closing = 0;
934 portp->tty = NULL;
935
936 if (portp->openwaitcnt) {
937 if (portp->close_delay)
938 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
939 wake_up_interruptible(&portp->open_wait);
940 }
941
942 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
943 wake_up_interruptible(&portp->close_wait);
944 }
945
946 /*****************************************************************************/
947
948 /*
949 * Write routine. Take data and stuff it in to the TX ring queue.
950 * If transmit interrupts are not running then start them.
951 */
952
953 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
954 {
955 struct stlport *portp;
956 unsigned int len, stlen;
957 unsigned char *chbuf;
958 char *head, *tail;
959
960 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
961
962 portp = tty->driver_data;
963 if (portp == NULL)
964 return 0;
965 if (portp->tx.buf == NULL)
966 return 0;
967
968 /*
969 * If copying direct from user space we must cater for page faults,
970 * causing us to "sleep" here for a while. To handle this copy in all
971 * the data we need now, into a local buffer. Then when we got it all
972 * copy it into the TX buffer.
973 */
974 chbuf = (unsigned char *) buf;
975
976 head = portp->tx.head;
977 tail = portp->tx.tail;
978 if (head >= tail) {
979 len = STL_TXBUFSIZE - (head - tail) - 1;
980 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
981 } else {
982 len = tail - head - 1;
983 stlen = len;
984 }
985
986 len = min(len, (unsigned int)count);
987 count = 0;
988 while (len > 0) {
989 stlen = min(len, stlen);
990 memcpy(head, chbuf, stlen);
991 len -= stlen;
992 chbuf += stlen;
993 count += stlen;
994 head += stlen;
995 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
996 head = portp->tx.buf;
997 stlen = tail - head;
998 }
999 }
1000 portp->tx.head = head;
1001
1002 clear_bit(ASYI_TXLOW, &portp->istate);
1003 stl_startrxtx(portp, -1, 1);
1004
1005 return count;
1006 }
1007
1008 /*****************************************************************************/
1009
1010 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1011 {
1012 struct stlport *portp;
1013 unsigned int len;
1014 char *head, *tail;
1015
1016 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1017
1018 if (tty == NULL)
1019 return;
1020 portp = tty->driver_data;
1021 if (portp == NULL)
1022 return;
1023 if (portp->tx.buf == NULL)
1024 return;
1025
1026 head = portp->tx.head;
1027 tail = portp->tx.tail;
1028
1029 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1030 len--;
1031
1032 if (len > 0) {
1033 *head++ = ch;
1034 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1035 head = portp->tx.buf;
1036 }
1037 portp->tx.head = head;
1038 }
1039
1040 /*****************************************************************************/
1041
1042 /*
1043 * If there are any characters in the buffer then make sure that TX
1044 * interrupts are on and get'em out. Normally used after the putchar
1045 * routine has been called.
1046 */
1047
1048 static void stl_flushchars(struct tty_struct *tty)
1049 {
1050 struct stlport *portp;
1051
1052 pr_debug("stl_flushchars(tty=%p)\n", tty);
1053
1054 if (tty == NULL)
1055 return;
1056 portp = tty->driver_data;
1057 if (portp == NULL)
1058 return;
1059 if (portp->tx.buf == NULL)
1060 return;
1061
1062 stl_startrxtx(portp, -1, 1);
1063 }
1064
1065 /*****************************************************************************/
1066
1067 static int stl_writeroom(struct tty_struct *tty)
1068 {
1069 struct stlport *portp;
1070 char *head, *tail;
1071
1072 pr_debug("stl_writeroom(tty=%p)\n", tty);
1073
1074 if (tty == NULL)
1075 return 0;
1076 portp = tty->driver_data;
1077 if (portp == NULL)
1078 return 0;
1079 if (portp->tx.buf == NULL)
1080 return 0;
1081
1082 head = portp->tx.head;
1083 tail = portp->tx.tail;
1084 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1085 }
1086
1087 /*****************************************************************************/
1088
1089 /*
1090 * Return number of chars in the TX buffer. Normally we would just
1091 * calculate the number of chars in the buffer and return that, but if
1092 * the buffer is empty and TX interrupts are still on then we return
1093 * that the buffer still has 1 char in it. This way whoever called us
1094 * will not think that ALL chars have drained - since the UART still
1095 * must have some chars in it (we are busy after all).
1096 */
1097
1098 static int stl_charsinbuffer(struct tty_struct *tty)
1099 {
1100 struct stlport *portp;
1101 unsigned int size;
1102 char *head, *tail;
1103
1104 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1105
1106 if (tty == NULL)
1107 return 0;
1108 portp = tty->driver_data;
1109 if (portp == NULL)
1110 return 0;
1111 if (portp->tx.buf == NULL)
1112 return 0;
1113
1114 head = portp->tx.head;
1115 tail = portp->tx.tail;
1116 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1117 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1118 size = 1;
1119 return size;
1120 }
1121
1122 /*****************************************************************************/
1123
1124 /*
1125 * Generate the serial struct info.
1126 */
1127
1128 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1129 {
1130 struct serial_struct sio;
1131 struct stlbrd *brdp;
1132
1133 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1134
1135 memset(&sio, 0, sizeof(struct serial_struct));
1136 sio.line = portp->portnr;
1137 sio.port = portp->ioaddr;
1138 sio.flags = portp->flags;
1139 sio.baud_base = portp->baud_base;
1140 sio.close_delay = portp->close_delay;
1141 sio.closing_wait = portp->closing_wait;
1142 sio.custom_divisor = portp->custom_divisor;
1143 sio.hub6 = 0;
1144 if (portp->uartp == &stl_cd1400uart) {
1145 sio.type = PORT_CIRRUS;
1146 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1147 } else {
1148 sio.type = PORT_UNKNOWN;
1149 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1150 }
1151
1152 brdp = stl_brds[portp->brdnr];
1153 if (brdp != NULL)
1154 sio.irq = brdp->irq;
1155
1156 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1157 }
1158
1159 /*****************************************************************************/
1160
1161 /*
1162 * Set port according to the serial struct info.
1163 * At this point we do not do any auto-configure stuff, so we will
1164 * just quietly ignore any requests to change irq, etc.
1165 */
1166
1167 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1168 {
1169 struct serial_struct sio;
1170
1171 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1172
1173 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1174 return -EFAULT;
1175 if (!capable(CAP_SYS_ADMIN)) {
1176 if ((sio.baud_base != portp->baud_base) ||
1177 (sio.close_delay != portp->close_delay) ||
1178 ((sio.flags & ~ASYNC_USR_MASK) !=
1179 (portp->flags & ~ASYNC_USR_MASK)))
1180 return -EPERM;
1181 }
1182
1183 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1184 (sio.flags & ASYNC_USR_MASK);
1185 portp->baud_base = sio.baud_base;
1186 portp->close_delay = sio.close_delay;
1187 portp->closing_wait = sio.closing_wait;
1188 portp->custom_divisor = sio.custom_divisor;
1189 stl_setport(portp, portp->tty->termios);
1190 return 0;
1191 }
1192
1193 /*****************************************************************************/
1194
1195 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1196 {
1197 struct stlport *portp;
1198
1199 if (tty == NULL)
1200 return -ENODEV;
1201 portp = tty->driver_data;
1202 if (portp == NULL)
1203 return -ENODEV;
1204 if (tty->flags & (1 << TTY_IO_ERROR))
1205 return -EIO;
1206
1207 return stl_getsignals(portp);
1208 }
1209
1210 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1211 unsigned int set, unsigned int clear)
1212 {
1213 struct stlport *portp;
1214 int rts = -1, dtr = -1;
1215
1216 if (tty == NULL)
1217 return -ENODEV;
1218 portp = tty->driver_data;
1219 if (portp == NULL)
1220 return -ENODEV;
1221 if (tty->flags & (1 << TTY_IO_ERROR))
1222 return -EIO;
1223
1224 if (set & TIOCM_RTS)
1225 rts = 1;
1226 if (set & TIOCM_DTR)
1227 dtr = 1;
1228 if (clear & TIOCM_RTS)
1229 rts = 0;
1230 if (clear & TIOCM_DTR)
1231 dtr = 0;
1232
1233 stl_setsignals(portp, dtr, rts);
1234 return 0;
1235 }
1236
1237 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1238 {
1239 struct stlport *portp;
1240 unsigned int ival;
1241 int rc;
1242 void __user *argp = (void __user *)arg;
1243
1244 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1245 arg);
1246
1247 if (tty == NULL)
1248 return -ENODEV;
1249 portp = tty->driver_data;
1250 if (portp == NULL)
1251 return -ENODEV;
1252
1253 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1254 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1255 if (tty->flags & (1 << TTY_IO_ERROR))
1256 return -EIO;
1257
1258 rc = 0;
1259
1260 switch (cmd) {
1261 case TIOCGSOFTCAR:
1262 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1263 (unsigned __user *) argp);
1264 break;
1265 case TIOCSSOFTCAR:
1266 if (get_user(ival, (unsigned int __user *) arg))
1267 return -EFAULT;
1268 tty->termios->c_cflag =
1269 (tty->termios->c_cflag & ~CLOCAL) |
1270 (ival ? CLOCAL : 0);
1271 break;
1272 case TIOCGSERIAL:
1273 rc = stl_getserial(portp, argp);
1274 break;
1275 case TIOCSSERIAL:
1276 rc = stl_setserial(portp, argp);
1277 break;
1278 case COM_GETPORTSTATS:
1279 rc = stl_getportstats(portp, argp);
1280 break;
1281 case COM_CLRPORTSTATS:
1282 rc = stl_clrportstats(portp, argp);
1283 break;
1284 case TIOCSERCONFIG:
1285 case TIOCSERGWILD:
1286 case TIOCSERSWILD:
1287 case TIOCSERGETLSR:
1288 case TIOCSERGSTRUCT:
1289 case TIOCSERGETMULTI:
1290 case TIOCSERSETMULTI:
1291 default:
1292 rc = -ENOIOCTLCMD;
1293 break;
1294 }
1295
1296 return rc;
1297 }
1298
1299 /*****************************************************************************/
1300
1301 /*
1302 * Start the transmitter again. Just turn TX interrupts back on.
1303 */
1304
1305 static void stl_start(struct tty_struct *tty)
1306 {
1307 struct stlport *portp;
1308
1309 pr_debug("stl_start(tty=%p)\n", tty);
1310
1311 if (tty == NULL)
1312 return;
1313 portp = tty->driver_data;
1314 if (portp == NULL)
1315 return;
1316 stl_startrxtx(portp, -1, 1);
1317 }
1318
1319 /*****************************************************************************/
1320
1321 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1322 {
1323 struct stlport *portp;
1324 struct ktermios *tiosp;
1325
1326 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1327
1328 if (tty == NULL)
1329 return;
1330 portp = tty->driver_data;
1331 if (portp == NULL)
1332 return;
1333
1334 tiosp = tty->termios;
1335 if ((tiosp->c_cflag == old->c_cflag) &&
1336 (tiosp->c_iflag == old->c_iflag))
1337 return;
1338
1339 stl_setport(portp, tiosp);
1340 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1341 -1);
1342 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1343 tty->hw_stopped = 0;
1344 stl_start(tty);
1345 }
1346 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1347 wake_up_interruptible(&portp->open_wait);
1348 }
1349
1350 /*****************************************************************************/
1351
1352 /*
1353 * Attempt to flow control who ever is sending us data. Based on termios
1354 * settings use software or/and hardware flow control.
1355 */
1356
1357 static void stl_throttle(struct tty_struct *tty)
1358 {
1359 struct stlport *portp;
1360
1361 pr_debug("stl_throttle(tty=%p)\n", tty);
1362
1363 if (tty == NULL)
1364 return;
1365 portp = tty->driver_data;
1366 if (portp == NULL)
1367 return;
1368 stl_flowctrl(portp, 0);
1369 }
1370
1371 /*****************************************************************************/
1372
1373 /*
1374 * Unflow control the device sending us data...
1375 */
1376
1377 static void stl_unthrottle(struct tty_struct *tty)
1378 {
1379 struct stlport *portp;
1380
1381 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1382
1383 if (tty == NULL)
1384 return;
1385 portp = tty->driver_data;
1386 if (portp == NULL)
1387 return;
1388 stl_flowctrl(portp, 1);
1389 }
1390
1391 /*****************************************************************************/
1392
1393 /*
1394 * Stop the transmitter. Basically to do this we will just turn TX
1395 * interrupts off.
1396 */
1397
1398 static void stl_stop(struct tty_struct *tty)
1399 {
1400 struct stlport *portp;
1401
1402 pr_debug("stl_stop(tty=%p)\n", tty);
1403
1404 if (tty == NULL)
1405 return;
1406 portp = tty->driver_data;
1407 if (portp == NULL)
1408 return;
1409 stl_startrxtx(portp, -1, 0);
1410 }
1411
1412 /*****************************************************************************/
1413
1414 /*
1415 * Hangup this port. This is pretty much like closing the port, only
1416 * a little more brutal. No waiting for data to drain. Shutdown the
1417 * port and maybe drop signals.
1418 */
1419
1420 static void stl_hangup(struct tty_struct *tty)
1421 {
1422 struct stlport *portp;
1423
1424 pr_debug("stl_hangup(tty=%p)\n", tty);
1425
1426 if (tty == NULL)
1427 return;
1428 portp = tty->driver_data;
1429 if (portp == NULL)
1430 return;
1431
1432 portp->flags &= ~ASYNC_INITIALIZED;
1433 stl_disableintrs(portp);
1434 if (tty->termios->c_cflag & HUPCL)
1435 stl_setsignals(portp, 0, 0);
1436 stl_enablerxtx(portp, 0, 0);
1437 stl_flushbuffer(tty);
1438 portp->istate = 0;
1439 set_bit(TTY_IO_ERROR, &tty->flags);
1440 if (portp->tx.buf != NULL) {
1441 kfree(portp->tx.buf);
1442 portp->tx.buf = NULL;
1443 portp->tx.head = NULL;
1444 portp->tx.tail = NULL;
1445 }
1446 portp->tty = NULL;
1447 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1448 portp->refcount = 0;
1449 wake_up_interruptible(&portp->open_wait);
1450 }
1451
1452 /*****************************************************************************/
1453
1454 static void stl_breakctl(struct tty_struct *tty, int state)
1455 {
1456 struct stlport *portp;
1457
1458 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1459
1460 if (tty == NULL)
1461 return;
1462 portp = tty->driver_data;
1463 if (portp == NULL)
1464 return;
1465
1466 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1467 }
1468
1469 /*****************************************************************************/
1470
1471 static void stl_sendxchar(struct tty_struct *tty, char ch)
1472 {
1473 struct stlport *portp;
1474
1475 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1476
1477 if (tty == NULL)
1478 return;
1479 portp = tty->driver_data;
1480 if (portp == NULL)
1481 return;
1482
1483 if (ch == STOP_CHAR(tty))
1484 stl_sendflow(portp, 0);
1485 else if (ch == START_CHAR(tty))
1486 stl_sendflow(portp, 1);
1487 else
1488 stl_putchar(tty, ch);
1489 }
1490
1491 /*****************************************************************************/
1492
1493 #define MAXLINE 80
1494
1495 /*
1496 * Format info for a specified port. The line is deliberately limited
1497 * to 80 characters. (If it is too long it will be truncated, if too
1498 * short then padded with spaces).
1499 */
1500
1501 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1502 {
1503 char *sp;
1504 int sigs, cnt;
1505
1506 sp = pos;
1507 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1508 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1509 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1510
1511 if (portp->stats.rxframing)
1512 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1513 if (portp->stats.rxparity)
1514 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1515 if (portp->stats.rxbreaks)
1516 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1517 if (portp->stats.rxoverrun)
1518 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1519
1520 sigs = stl_getsignals(portp);
1521 cnt = sprintf(sp, "%s%s%s%s%s ",
1522 (sigs & TIOCM_RTS) ? "|RTS" : "",
1523 (sigs & TIOCM_CTS) ? "|CTS" : "",
1524 (sigs & TIOCM_DTR) ? "|DTR" : "",
1525 (sigs & TIOCM_CD) ? "|DCD" : "",
1526 (sigs & TIOCM_DSR) ? "|DSR" : "");
1527 *sp = ' ';
1528 sp += cnt;
1529
1530 for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
1531 *sp++ = ' ';
1532 if (cnt >= MAXLINE)
1533 pos[(MAXLINE - 2)] = '+';
1534 pos[(MAXLINE - 1)] = '\n';
1535
1536 return MAXLINE;
1537 }
1538
1539 /*****************************************************************************/
1540
1541 /*
1542 * Port info, read from the /proc file system.
1543 */
1544
1545 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1546 {
1547 struct stlbrd *brdp;
1548 struct stlpanel *panelp;
1549 struct stlport *portp;
1550 unsigned int brdnr, panelnr, portnr;
1551 int totalport, curoff, maxoff;
1552 char *pos;
1553
1554 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1555 "data=%p\n", page, start, off, count, eof, data);
1556
1557 pos = page;
1558 totalport = 0;
1559 curoff = 0;
1560
1561 if (off == 0) {
1562 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1563 stl_drvversion);
1564 while (pos < (page + MAXLINE - 1))
1565 *pos++ = ' ';
1566 *pos++ = '\n';
1567 }
1568 curoff = MAXLINE;
1569
1570 /*
1571 * We scan through for each board, panel and port. The offset is
1572 * calculated on the fly, and irrelevant ports are skipped.
1573 */
1574 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1575 brdp = stl_brds[brdnr];
1576 if (brdp == NULL)
1577 continue;
1578 if (brdp->state == 0)
1579 continue;
1580
1581 maxoff = curoff + (brdp->nrports * MAXLINE);
1582 if (off >= maxoff) {
1583 curoff = maxoff;
1584 continue;
1585 }
1586
1587 totalport = brdnr * STL_MAXPORTS;
1588 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1589 panelp = brdp->panels[panelnr];
1590 if (panelp == NULL)
1591 continue;
1592
1593 maxoff = curoff + (panelp->nrports * MAXLINE);
1594 if (off >= maxoff) {
1595 curoff = maxoff;
1596 totalport += panelp->nrports;
1597 continue;
1598 }
1599
1600 for (portnr = 0; portnr < panelp->nrports; portnr++,
1601 totalport++) {
1602 portp = panelp->ports[portnr];
1603 if (portp == NULL)
1604 continue;
1605 if (off >= (curoff += MAXLINE))
1606 continue;
1607 if ((pos - page + MAXLINE) > count)
1608 goto stl_readdone;
1609 pos += stl_portinfo(portp, totalport, pos);
1610 }
1611 }
1612 }
1613
1614 *eof = 1;
1615
1616 stl_readdone:
1617 *start = page;
1618 return pos - page;
1619 }
1620
1621 /*****************************************************************************/
1622
1623 /*
1624 * All board interrupts are vectored through here first. This code then
1625 * calls off to the approrpriate board interrupt handlers.
1626 */
1627
1628 static irqreturn_t stl_intr(int irq, void *dev_id)
1629 {
1630 struct stlbrd *brdp = dev_id;
1631
1632 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
1633
1634 return IRQ_RETVAL((* brdp->isr)(brdp));
1635 }
1636
1637 /*****************************************************************************/
1638
1639 /*
1640 * Interrupt service routine for EasyIO board types.
1641 */
1642
1643 static int stl_eiointr(struct stlbrd *brdp)
1644 {
1645 struct stlpanel *panelp;
1646 unsigned int iobase;
1647 int handled = 0;
1648
1649 spin_lock(&brd_lock);
1650 panelp = brdp->panels[0];
1651 iobase = panelp->iobase;
1652 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1653 handled = 1;
1654 (* panelp->isr)(panelp, iobase);
1655 }
1656 spin_unlock(&brd_lock);
1657 return handled;
1658 }
1659
1660 /*****************************************************************************/
1661
1662 /*
1663 * Interrupt service routine for ECH-AT board types.
1664 */
1665
1666 static int stl_echatintr(struct stlbrd *brdp)
1667 {
1668 struct stlpanel *panelp;
1669 unsigned int ioaddr, bnknr;
1670 int handled = 0;
1671
1672 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1673
1674 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1675 handled = 1;
1676 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1677 ioaddr = brdp->bnkstataddr[bnknr];
1678 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1679 panelp = brdp->bnk2panel[bnknr];
1680 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1681 }
1682 }
1683 }
1684
1685 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1686
1687 return handled;
1688 }
1689
1690 /*****************************************************************************/
1691
1692 /*
1693 * Interrupt service routine for ECH-MCA board types.
1694 */
1695
1696 static int stl_echmcaintr(struct stlbrd *brdp)
1697 {
1698 struct stlpanel *panelp;
1699 unsigned int ioaddr, bnknr;
1700 int handled = 0;
1701
1702 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1703 handled = 1;
1704 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1705 ioaddr = brdp->bnkstataddr[bnknr];
1706 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1707 panelp = brdp->bnk2panel[bnknr];
1708 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1709 }
1710 }
1711 }
1712 return handled;
1713 }
1714
1715 /*****************************************************************************/
1716
1717 /*
1718 * Interrupt service routine for ECH-PCI board types.
1719 */
1720
1721 static int stl_echpciintr(struct stlbrd *brdp)
1722 {
1723 struct stlpanel *panelp;
1724 unsigned int ioaddr, bnknr, recheck;
1725 int handled = 0;
1726
1727 while (1) {
1728 recheck = 0;
1729 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1730 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1731 ioaddr = brdp->bnkstataddr[bnknr];
1732 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1733 panelp = brdp->bnk2panel[bnknr];
1734 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1735 recheck++;
1736 handled = 1;
1737 }
1738 }
1739 if (! recheck)
1740 break;
1741 }
1742 return handled;
1743 }
1744
1745 /*****************************************************************************/
1746
1747 /*
1748 * Interrupt service routine for ECH-8/64-PCI board types.
1749 */
1750
1751 static int stl_echpci64intr(struct stlbrd *brdp)
1752 {
1753 struct stlpanel *panelp;
1754 unsigned int ioaddr, bnknr;
1755 int handled = 0;
1756
1757 while (inb(brdp->ioctrl) & 0x1) {
1758 handled = 1;
1759 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1760 ioaddr = brdp->bnkstataddr[bnknr];
1761 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1762 panelp = brdp->bnk2panel[bnknr];
1763 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1764 }
1765 }
1766 }
1767
1768 return handled;
1769 }
1770
1771 /*****************************************************************************/
1772
1773 /*
1774 * Service an off-level request for some channel.
1775 */
1776 static void stl_offintr(struct work_struct *work)
1777 {
1778 struct stlport *portp = container_of(work, struct stlport, tqueue);
1779 struct tty_struct *tty;
1780 unsigned int oldsigs;
1781
1782 pr_debug("stl_offintr(portp=%p)\n", portp);
1783
1784 if (portp == NULL)
1785 return;
1786
1787 tty = portp->tty;
1788 if (tty == NULL)
1789 return;
1790
1791 lock_kernel();
1792 if (test_bit(ASYI_TXLOW, &portp->istate))
1793 tty_wakeup(tty);
1794
1795 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
1796 clear_bit(ASYI_DCDCHANGE, &portp->istate);
1797 oldsigs = portp->sigs;
1798 portp->sigs = stl_getsignals(portp);
1799 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
1800 wake_up_interruptible(&portp->open_wait);
1801 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
1802 if (portp->flags & ASYNC_CHECK_CD)
1803 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1804 }
1805 unlock_kernel();
1806 }
1807
1808 /*****************************************************************************/
1809
1810 /*
1811 * Initialize all the ports on a panel.
1812 */
1813
1814 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1815 {
1816 struct stlport *portp;
1817 unsigned int i;
1818 int chipmask;
1819
1820 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1821
1822 chipmask = stl_panelinit(brdp, panelp);
1823
1824 /*
1825 * All UART's are initialized (if found!). Now go through and setup
1826 * each ports data structures.
1827 */
1828 for (i = 0; i < panelp->nrports; i++) {
1829 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1830 if (!portp) {
1831 printk("STALLION: failed to allocate memory "
1832 "(size=%Zd)\n", sizeof(struct stlport));
1833 break;
1834 }
1835
1836 portp->magic = STL_PORTMAGIC;
1837 portp->portnr = i;
1838 portp->brdnr = panelp->brdnr;
1839 portp->panelnr = panelp->panelnr;
1840 portp->uartp = panelp->uartp;
1841 portp->clk = brdp->clk;
1842 portp->baud_base = STL_BAUDBASE;
1843 portp->close_delay = STL_CLOSEDELAY;
1844 portp->closing_wait = 30 * HZ;
1845 INIT_WORK(&portp->tqueue, stl_offintr);
1846 init_waitqueue_head(&portp->open_wait);
1847 init_waitqueue_head(&portp->close_wait);
1848 portp->stats.brd = portp->brdnr;
1849 portp->stats.panel = portp->panelnr;
1850 portp->stats.port = portp->portnr;
1851 panelp->ports[i] = portp;
1852 stl_portinit(brdp, panelp, portp);
1853 }
1854
1855 return 0;
1856 }
1857
1858 static void stl_cleanup_panels(struct stlbrd *brdp)
1859 {
1860 struct stlpanel *panelp;
1861 struct stlport *portp;
1862 unsigned int j, k;
1863
1864 for (j = 0; j < STL_MAXPANELS; j++) {
1865 panelp = brdp->panels[j];
1866 if (panelp == NULL)
1867 continue;
1868 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1869 portp = panelp->ports[k];
1870 if (portp == NULL)
1871 continue;
1872 if (portp->tty != NULL)
1873 stl_hangup(portp->tty);
1874 kfree(portp->tx.buf);
1875 kfree(portp);
1876 }
1877 kfree(panelp);
1878 }
1879 }
1880
1881 /*****************************************************************************/
1882
1883 /*
1884 * Try to find and initialize an EasyIO board.
1885 */
1886
1887 static int __devinit stl_initeio(struct stlbrd *brdp)
1888 {
1889 struct stlpanel *panelp;
1890 unsigned int status;
1891 char *name;
1892 int retval;
1893
1894 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1895
1896 brdp->ioctrl = brdp->ioaddr1 + 1;
1897 brdp->iostatus = brdp->ioaddr1 + 2;
1898
1899 status = inb(brdp->iostatus);
1900 if ((status & EIO_IDBITMASK) == EIO_MK3)
1901 brdp->ioctrl++;
1902
1903 /*
1904 * Handle board specific stuff now. The real difference is PCI
1905 * or not PCI.
1906 */
1907 if (brdp->brdtype == BRD_EASYIOPCI) {
1908 brdp->iosize1 = 0x80;
1909 brdp->iosize2 = 0x80;
1910 name = "serial(EIO-PCI)";
1911 outb(0x41, (brdp->ioaddr2 + 0x4c));
1912 } else {
1913 brdp->iosize1 = 8;
1914 name = "serial(EIO)";
1915 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1916 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1917 printk("STALLION: invalid irq=%d for brd=%d\n",
1918 brdp->irq, brdp->brdnr);
1919 retval = -EINVAL;
1920 goto err;
1921 }
1922 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1923 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1924 brdp->ioctrl);
1925 }
1926
1927 retval = -EBUSY;
1928 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1929 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1930 "%x conflicts with another device\n", brdp->brdnr,
1931 brdp->ioaddr1);
1932 goto err;
1933 }
1934
1935 if (brdp->iosize2 > 0)
1936 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1937 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1938 "address %x conflicts with another device\n",
1939 brdp->brdnr, brdp->ioaddr2);
1940 printk(KERN_WARNING "STALLION: Warning, also "
1941 "releasing board %d I/O address %x \n",
1942 brdp->brdnr, brdp->ioaddr1);
1943 goto err_rel1;
1944 }
1945
1946 /*
1947 * Everything looks OK, so let's go ahead and probe for the hardware.
1948 */
1949 brdp->clk = CD1400_CLK;
1950 brdp->isr = stl_eiointr;
1951
1952 retval = -ENODEV;
1953 switch (status & EIO_IDBITMASK) {
1954 case EIO_8PORTM:
1955 brdp->clk = CD1400_CLK8M;
1956 /* fall thru */
1957 case EIO_8PORTRS:
1958 case EIO_8PORTDI:
1959 brdp->nrports = 8;
1960 break;
1961 case EIO_4PORTRS:
1962 brdp->nrports = 4;
1963 break;
1964 case EIO_MK3:
1965 switch (status & EIO_BRDMASK) {
1966 case ID_BRD4:
1967 brdp->nrports = 4;
1968 break;
1969 case ID_BRD8:
1970 brdp->nrports = 8;
1971 break;
1972 case ID_BRD16:
1973 brdp->nrports = 16;
1974 break;
1975 default:
1976 goto err_rel2;
1977 }
1978 break;
1979 default:
1980 goto err_rel2;
1981 }
1982
1983 /*
1984 * We have verified that the board is actually present, so now we
1985 * can complete the setup.
1986 */
1987
1988 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1989 if (!panelp) {
1990 printk(KERN_WARNING "STALLION: failed to allocate memory "
1991 "(size=%Zd)\n", sizeof(struct stlpanel));
1992 retval = -ENOMEM;
1993 goto err_rel2;
1994 }
1995
1996 panelp->magic = STL_PANELMAGIC;
1997 panelp->brdnr = brdp->brdnr;
1998 panelp->panelnr = 0;
1999 panelp->nrports = brdp->nrports;
2000 panelp->iobase = brdp->ioaddr1;
2001 panelp->hwid = status;
2002 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2003 panelp->uartp = &stl_sc26198uart;
2004 panelp->isr = stl_sc26198intr;
2005 } else {
2006 panelp->uartp = &stl_cd1400uart;
2007 panelp->isr = stl_cd1400eiointr;
2008 }
2009
2010 brdp->panels[0] = panelp;
2011 brdp->nrpanels = 1;
2012 brdp->state |= BRD_FOUND;
2013 brdp->hwid = status;
2014 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2015 printk("STALLION: failed to register interrupt "
2016 "routine for %s irq=%d\n", name, brdp->irq);
2017 retval = -ENODEV;
2018 goto err_fr;
2019 }
2020
2021 return 0;
2022 err_fr:
2023 stl_cleanup_panels(brdp);
2024 err_rel2:
2025 if (brdp->iosize2 > 0)
2026 release_region(brdp->ioaddr2, brdp->iosize2);
2027 err_rel1:
2028 release_region(brdp->ioaddr1, brdp->iosize1);
2029 err:
2030 return retval;
2031 }
2032
2033 /*****************************************************************************/
2034
2035 /*
2036 * Try to find an ECH board and initialize it. This code is capable of
2037 * dealing with all types of ECH board.
2038 */
2039
2040 static int __devinit stl_initech(struct stlbrd *brdp)
2041 {
2042 struct stlpanel *panelp;
2043 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
2044 int retval;
2045 char *name;
2046
2047 pr_debug("stl_initech(brdp=%p)\n", brdp);
2048
2049 status = 0;
2050 conflict = 0;
2051
2052 /*
2053 * Set up the initial board register contents for boards. This varies a
2054 * bit between the different board types. So we need to handle each
2055 * separately. Also do a check that the supplied IRQ is good.
2056 */
2057 switch (brdp->brdtype) {
2058
2059 case BRD_ECH:
2060 brdp->isr = stl_echatintr;
2061 brdp->ioctrl = brdp->ioaddr1 + 1;
2062 brdp->iostatus = brdp->ioaddr1 + 1;
2063 status = inb(brdp->iostatus);
2064 if ((status & ECH_IDBITMASK) != ECH_ID) {
2065 retval = -ENODEV;
2066 goto err;
2067 }
2068 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2069 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2070 printk("STALLION: invalid irq=%d for brd=%d\n",
2071 brdp->irq, brdp->brdnr);
2072 retval = -EINVAL;
2073 goto err;
2074 }
2075 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2076 status |= (stl_vecmap[brdp->irq] << 1);
2077 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2078 brdp->ioctrlval = ECH_INTENABLE |
2079 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2080 for (i = 0; i < 10; i++)
2081 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2082 brdp->iosize1 = 2;
2083 brdp->iosize2 = 32;
2084 name = "serial(EC8/32)";
2085 outb(status, brdp->ioaddr1);
2086 break;
2087
2088 case BRD_ECHMC:
2089 brdp->isr = stl_echmcaintr;
2090 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2091 brdp->iostatus = brdp->ioctrl;
2092 status = inb(brdp->iostatus);
2093 if ((status & ECH_IDBITMASK) != ECH_ID) {
2094 retval = -ENODEV;
2095 goto err;
2096 }
2097 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2098 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2099 printk("STALLION: invalid irq=%d for brd=%d\n",
2100 brdp->irq, brdp->brdnr);
2101 retval = -EINVAL;
2102 goto err;
2103 }
2104 outb(ECHMC_BRDRESET, brdp->ioctrl);
2105 outb(ECHMC_INTENABLE, brdp->ioctrl);
2106 brdp->iosize1 = 64;
2107 name = "serial(EC8/32-MC)";
2108 break;
2109
2110 case BRD_ECHPCI:
2111 brdp->isr = stl_echpciintr;
2112 brdp->ioctrl = brdp->ioaddr1 + 2;
2113 brdp->iosize1 = 4;
2114 brdp->iosize2 = 8;
2115 name = "serial(EC8/32-PCI)";
2116 break;
2117
2118 case BRD_ECH64PCI:
2119 brdp->isr = stl_echpci64intr;
2120 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2121 outb(0x43, (brdp->ioaddr1 + 0x4c));
2122 brdp->iosize1 = 0x80;
2123 brdp->iosize2 = 0x80;
2124 name = "serial(EC8/64-PCI)";
2125 break;
2126
2127 default:
2128 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2129 retval = -EINVAL;
2130 goto err;
2131 }
2132
2133 /*
2134 * Check boards for possible IO address conflicts and return fail status
2135 * if an IO conflict found.
2136 */
2137 retval = -EBUSY;
2138 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2139 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2140 "%x conflicts with another device\n", brdp->brdnr,
2141 brdp->ioaddr1);
2142 goto err;
2143 }
2144
2145 if (brdp->iosize2 > 0)
2146 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2147 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2148 "address %x conflicts with another device\n",
2149 brdp->brdnr, brdp->ioaddr2);
2150 printk(KERN_WARNING "STALLION: Warning, also "
2151 "releasing board %d I/O address %x \n",
2152 brdp->brdnr, brdp->ioaddr1);
2153 goto err_rel1;
2154 }
2155
2156 /*
2157 * Scan through the secondary io address space looking for panels.
2158 * As we find'em allocate and initialize panel structures for each.
2159 */
2160 brdp->clk = CD1400_CLK;
2161 brdp->hwid = status;
2162
2163 ioaddr = brdp->ioaddr2;
2164 banknr = 0;
2165 panelnr = 0;
2166 nxtid = 0;
2167
2168 for (i = 0; i < STL_MAXPANELS; i++) {
2169 if (brdp->brdtype == BRD_ECHPCI) {
2170 outb(nxtid, brdp->ioctrl);
2171 ioaddr = brdp->ioaddr2;
2172 }
2173 status = inb(ioaddr + ECH_PNLSTATUS);
2174 if ((status & ECH_PNLIDMASK) != nxtid)
2175 goto err_fr;
2176 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2177 if (!panelp) {
2178 printk("STALLION: failed to allocate memory "
2179 "(size=%Zd)\n", sizeof(struct stlpanel));
2180 goto err_fr;
2181 }
2182 panelp->magic = STL_PANELMAGIC;
2183 panelp->brdnr = brdp->brdnr;
2184 panelp->panelnr = panelnr;
2185 panelp->iobase = ioaddr;
2186 panelp->pagenr = nxtid;
2187 panelp->hwid = status;
2188 brdp->bnk2panel[banknr] = panelp;
2189 brdp->bnkpageaddr[banknr] = nxtid;
2190 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2191
2192 if (status & ECH_PNLXPID) {
2193 panelp->uartp = &stl_sc26198uart;
2194 panelp->isr = stl_sc26198intr;
2195 if (status & ECH_PNL16PORT) {
2196 panelp->nrports = 16;
2197 brdp->bnk2panel[banknr] = panelp;
2198 brdp->bnkpageaddr[banknr] = nxtid;
2199 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2200 ECH_PNLSTATUS;
2201 } else
2202 panelp->nrports = 8;
2203 } else {
2204 panelp->uartp = &stl_cd1400uart;
2205 panelp->isr = stl_cd1400echintr;
2206 if (status & ECH_PNL16PORT) {
2207 panelp->nrports = 16;
2208 panelp->ackmask = 0x80;
2209 if (brdp->brdtype != BRD_ECHPCI)
2210 ioaddr += EREG_BANKSIZE;
2211 brdp->bnk2panel[banknr] = panelp;
2212 brdp->bnkpageaddr[banknr] = ++nxtid;
2213 brdp->bnkstataddr[banknr++] = ioaddr +
2214 ECH_PNLSTATUS;
2215 } else {
2216 panelp->nrports = 8;
2217 panelp->ackmask = 0xc0;
2218 }
2219 }
2220
2221 nxtid++;
2222 ioaddr += EREG_BANKSIZE;
2223 brdp->nrports += panelp->nrports;
2224 brdp->panels[panelnr++] = panelp;
2225 if ((brdp->brdtype != BRD_ECHPCI) &&
2226 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2227 goto err_fr;
2228 }
2229
2230 brdp->nrpanels = panelnr;
2231 brdp->nrbnks = banknr;
2232 if (brdp->brdtype == BRD_ECH)
2233 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2234
2235 brdp->state |= BRD_FOUND;
2236 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2237 printk("STALLION: failed to register interrupt "
2238 "routine for %s irq=%d\n", name, brdp->irq);
2239 retval = -ENODEV;
2240 goto err_fr;
2241 }
2242
2243 return 0;
2244 err_fr:
2245 stl_cleanup_panels(brdp);
2246 if (brdp->iosize2 > 0)
2247 release_region(brdp->ioaddr2, brdp->iosize2);
2248 err_rel1:
2249 release_region(brdp->ioaddr1, brdp->iosize1);
2250 err:
2251 return retval;
2252 }
2253
2254 /*****************************************************************************/
2255
2256 /*
2257 * Initialize and configure the specified board.
2258 * Scan through all the boards in the configuration and see what we
2259 * can find. Handle EIO and the ECH boards a little differently here
2260 * since the initial search and setup is very different.
2261 */
2262
2263 static int __devinit stl_brdinit(struct stlbrd *brdp)
2264 {
2265 int i, retval;
2266
2267 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2268
2269 switch (brdp->brdtype) {
2270 case BRD_EASYIO:
2271 case BRD_EASYIOPCI:
2272 retval = stl_initeio(brdp);
2273 if (retval)
2274 goto err;
2275 break;
2276 case BRD_ECH:
2277 case BRD_ECHMC:
2278 case BRD_ECHPCI:
2279 case BRD_ECH64PCI:
2280 retval = stl_initech(brdp);
2281 if (retval)
2282 goto err;
2283 break;
2284 default:
2285 printk("STALLION: board=%d is unknown board type=%d\n",
2286 brdp->brdnr, brdp->brdtype);
2287 retval = -ENODEV;
2288 goto err;
2289 }
2290
2291 if ((brdp->state & BRD_FOUND) == 0) {
2292 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2293 stl_brdnames[brdp->brdtype], brdp->brdnr,
2294 brdp->ioaddr1, brdp->irq);
2295 goto err_free;
2296 }
2297
2298 for (i = 0; i < STL_MAXPANELS; i++)
2299 if (brdp->panels[i] != NULL)
2300 stl_initports(brdp, brdp->panels[i]);
2301
2302 printk("STALLION: %s found, board=%d io=%x irq=%d "
2303 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2304 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2305 brdp->nrports);
2306
2307 return 0;
2308 err_free:
2309 free_irq(brdp->irq, brdp);
2310
2311 stl_cleanup_panels(brdp);
2312
2313 release_region(brdp->ioaddr1, brdp->iosize1);
2314 if (brdp->iosize2 > 0)
2315 release_region(brdp->ioaddr2, brdp->iosize2);
2316 err:
2317 return retval;
2318 }
2319
2320 /*****************************************************************************/
2321
2322 /*
2323 * Find the next available board number that is free.
2324 */
2325
2326 static int __devinit stl_getbrdnr(void)
2327 {
2328 unsigned int i;
2329
2330 for (i = 0; i < STL_MAXBRDS; i++)
2331 if (stl_brds[i] == NULL) {
2332 if (i >= stl_nrbrds)
2333 stl_nrbrds = i + 1;
2334 return i;
2335 }
2336
2337 return -1;
2338 }
2339
2340 /*****************************************************************************/
2341 /*
2342 * We have a Stallion board. Allocate a board structure and
2343 * initialize it. Read its IO and IRQ resources from PCI
2344 * configuration space.
2345 */
2346
2347 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2348 const struct pci_device_id *ent)
2349 {
2350 struct stlbrd *brdp;
2351 unsigned int i, brdtype = ent->driver_data;
2352 int brdnr, retval = -ENODEV;
2353
2354 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2355 goto err;
2356
2357 dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n",
2358 pdev->vendor, pdev->device, pdev->class);
2359
2360 retval = pci_enable_device(pdev);
2361 if (retval)
2362 goto err;
2363 brdp = stl_allocbrd();
2364 if (brdp == NULL) {
2365 retval = -ENOMEM;
2366 goto err;
2367 }
2368 mutex_lock(&stl_brdslock);
2369 brdnr = stl_getbrdnr();
2370 if (brdnr < 0) {
2371 dev_err(&pdev->dev, "too many boards found, "
2372 "maximum supported %d\n", STL_MAXBRDS);
2373 mutex_unlock(&stl_brdslock);
2374 goto err_fr;
2375 }
2376 brdp->brdnr = (unsigned int)brdnr;
2377 stl_brds[brdp->brdnr] = brdp;
2378 mutex_unlock(&stl_brdslock);
2379
2380 brdp->brdtype = brdtype;
2381 brdp->state |= STL_PROBED;
2382
2383 /*
2384 * We have all resources from the board, so let's setup the actual
2385 * board structure now.
2386 */
2387 switch (brdtype) {
2388 case BRD_ECHPCI:
2389 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2390 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2391 break;
2392 case BRD_ECH64PCI:
2393 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2394 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2395 break;
2396 case BRD_EASYIOPCI:
2397 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2398 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2399 break;
2400 default:
2401 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2402 break;
2403 }
2404
2405 brdp->irq = pdev->irq;
2406 retval = stl_brdinit(brdp);
2407 if (retval)
2408 goto err_null;
2409
2410 pci_set_drvdata(pdev, brdp);
2411
2412 for (i = 0; i < brdp->nrports; i++)
2413 tty_register_device(stl_serial,
2414 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2415
2416 return 0;
2417 err_null:
2418 stl_brds[brdp->brdnr] = NULL;
2419 err_fr:
2420 kfree(brdp);
2421 err:
2422 return retval;
2423 }
2424
2425 static void __devexit stl_pciremove(struct pci_dev *pdev)
2426 {
2427 struct stlbrd *brdp = pci_get_drvdata(pdev);
2428 unsigned int i;
2429
2430 free_irq(brdp->irq, brdp);
2431
2432 stl_cleanup_panels(brdp);
2433
2434 release_region(brdp->ioaddr1, brdp->iosize1);
2435 if (brdp->iosize2 > 0)
2436 release_region(brdp->ioaddr2, brdp->iosize2);
2437
2438 for (i = 0; i < brdp->nrports; i++)
2439 tty_unregister_device(stl_serial,
2440 brdp->brdnr * STL_MAXPORTS + i);
2441
2442 stl_brds[brdp->brdnr] = NULL;
2443 kfree(brdp);
2444 }
2445
2446 static struct pci_driver stl_pcidriver = {
2447 .name = "stallion",
2448 .id_table = stl_pcibrds,
2449 .probe = stl_pciprobe,
2450 .remove = __devexit_p(stl_pciremove)
2451 };
2452
2453 /*****************************************************************************/
2454
2455 /*
2456 * Return the board stats structure to user app.
2457 */
2458
2459 static int stl_getbrdstats(combrd_t __user *bp)
2460 {
2461 combrd_t stl_brdstats;
2462 struct stlbrd *brdp;
2463 struct stlpanel *panelp;
2464 unsigned int i;
2465
2466 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2467 return -EFAULT;
2468 if (stl_brdstats.brd >= STL_MAXBRDS)
2469 return -ENODEV;
2470 brdp = stl_brds[stl_brdstats.brd];
2471 if (brdp == NULL)
2472 return -ENODEV;
2473
2474 memset(&stl_brdstats, 0, sizeof(combrd_t));
2475 stl_brdstats.brd = brdp->brdnr;
2476 stl_brdstats.type = brdp->brdtype;
2477 stl_brdstats.hwid = brdp->hwid;
2478 stl_brdstats.state = brdp->state;
2479 stl_brdstats.ioaddr = brdp->ioaddr1;
2480 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2481 stl_brdstats.irq = brdp->irq;
2482 stl_brdstats.nrpanels = brdp->nrpanels;
2483 stl_brdstats.nrports = brdp->nrports;
2484 for (i = 0; i < brdp->nrpanels; i++) {
2485 panelp = brdp->panels[i];
2486 stl_brdstats.panels[i].panel = i;
2487 stl_brdstats.panels[i].hwid = panelp->hwid;
2488 stl_brdstats.panels[i].nrports = panelp->nrports;
2489 }
2490
2491 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2492 }
2493
2494 /*****************************************************************************/
2495
2496 /*
2497 * Resolve the referenced port number into a port struct pointer.
2498 */
2499
2500 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2501 {
2502 struct stlbrd *brdp;
2503 struct stlpanel *panelp;
2504
2505 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2506 return NULL;
2507 brdp = stl_brds[brdnr];
2508 if (brdp == NULL)
2509 return NULL;
2510 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2511 return NULL;
2512 panelp = brdp->panels[panelnr];
2513 if (panelp == NULL)
2514 return NULL;
2515 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2516 return NULL;
2517 return panelp->ports[portnr];
2518 }
2519
2520 /*****************************************************************************/
2521
2522 /*
2523 * Return the port stats structure to user app. A NULL port struct
2524 * pointer passed in means that we need to find out from the app
2525 * what port to get stats for (used through board control device).
2526 */
2527
2528 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2529 {
2530 comstats_t stl_comstats;
2531 unsigned char *head, *tail;
2532 unsigned long flags;
2533
2534 if (!portp) {
2535 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2536 return -EFAULT;
2537 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2538 stl_comstats.port);
2539 if (portp == NULL)
2540 return -ENODEV;
2541 }
2542
2543 portp->stats.state = portp->istate;
2544 portp->stats.flags = portp->flags;
2545 portp->stats.hwid = portp->hwid;
2546
2547 portp->stats.ttystate = 0;
2548 portp->stats.cflags = 0;
2549 portp->stats.iflags = 0;
2550 portp->stats.oflags = 0;
2551 portp->stats.lflags = 0;
2552 portp->stats.rxbuffered = 0;
2553
2554 spin_lock_irqsave(&stallion_lock, flags);
2555 if (portp->tty != NULL)
2556 if (portp->tty->driver_data == portp) {
2557 portp->stats.ttystate = portp->tty->flags;
2558 /* No longer available as a statistic */
2559 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2560 if (portp->tty->termios != NULL) {
2561 portp->stats.cflags = portp->tty->termios->c_cflag;
2562 portp->stats.iflags = portp->tty->termios->c_iflag;
2563 portp->stats.oflags = portp->tty->termios->c_oflag;
2564 portp->stats.lflags = portp->tty->termios->c_lflag;
2565 }
2566 }
2567 spin_unlock_irqrestore(&stallion_lock, flags);
2568
2569 head = portp->tx.head;
2570 tail = portp->tx.tail;
2571 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2572 (STL_TXBUFSIZE - (tail - head));
2573
2574 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2575
2576 return copy_to_user(cp, &portp->stats,
2577 sizeof(comstats_t)) ? -EFAULT : 0;
2578 }
2579
2580 /*****************************************************************************/
2581
2582 /*
2583 * Clear the port stats structure. We also return it zeroed out...
2584 */
2585
2586 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2587 {
2588 comstats_t stl_comstats;
2589
2590 if (!portp) {
2591 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2592 return -EFAULT;
2593 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2594 stl_comstats.port);
2595 if (portp == NULL)
2596 return -ENODEV;
2597 }
2598
2599 memset(&portp->stats, 0, sizeof(comstats_t));
2600 portp->stats.brd = portp->brdnr;
2601 portp->stats.panel = portp->panelnr;
2602 portp->stats.port = portp->portnr;
2603 return copy_to_user(cp, &portp->stats,
2604 sizeof(comstats_t)) ? -EFAULT : 0;
2605 }
2606
2607 /*****************************************************************************/
2608
2609 /*
2610 * Return the entire driver ports structure to a user app.
2611 */
2612
2613 static int stl_getportstruct(struct stlport __user *arg)
2614 {
2615 struct stlport stl_dummyport;
2616 struct stlport *portp;
2617
2618 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2619 return -EFAULT;
2620 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2621 stl_dummyport.portnr);
2622 if (!portp)
2623 return -ENODEV;
2624 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2625 }
2626
2627 /*****************************************************************************/
2628
2629 /*
2630 * Return the entire driver board structure to a user app.
2631 */
2632
2633 static int stl_getbrdstruct(struct stlbrd __user *arg)
2634 {
2635 struct stlbrd stl_dummybrd;
2636 struct stlbrd *brdp;
2637
2638 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2639 return -EFAULT;
2640 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2641 return -ENODEV;
2642 brdp = stl_brds[stl_dummybrd.brdnr];
2643 if (!brdp)
2644 return -ENODEV;
2645 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2646 }
2647
2648 /*****************************************************************************/
2649
2650 /*
2651 * The "staliomem" device is also required to do some special operations
2652 * on the board and/or ports. In this driver it is mostly used for stats
2653 * collection.
2654 */
2655
2656 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2657 {
2658 int brdnr, rc;
2659 void __user *argp = (void __user *)arg;
2660
2661 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2662
2663 brdnr = iminor(ip);
2664 if (brdnr >= STL_MAXBRDS)
2665 return -ENODEV;
2666 rc = 0;
2667
2668 switch (cmd) {
2669 case COM_GETPORTSTATS:
2670 rc = stl_getportstats(NULL, argp);
2671 break;
2672 case COM_CLRPORTSTATS:
2673 rc = stl_clrportstats(NULL, argp);
2674 break;
2675 case COM_GETBRDSTATS:
2676 rc = stl_getbrdstats(argp);
2677 break;
2678 case COM_READPORT:
2679 rc = stl_getportstruct(argp);
2680 break;
2681 case COM_READBOARD:
2682 rc = stl_getbrdstruct(argp);
2683 break;
2684 default:
2685 rc = -ENOIOCTLCMD;
2686 break;
2687 }
2688
2689 return rc;
2690 }
2691
2692 static const struct tty_operations stl_ops = {
2693 .open = stl_open,
2694 .close = stl_close,
2695 .write = stl_write,
2696 .put_char = stl_putchar,
2697 .flush_chars = stl_flushchars,
2698 .write_room = stl_writeroom,
2699 .chars_in_buffer = stl_charsinbuffer,
2700 .ioctl = stl_ioctl,
2701 .set_termios = stl_settermios,
2702 .throttle = stl_throttle,
2703 .unthrottle = stl_unthrottle,
2704 .stop = stl_stop,
2705 .start = stl_start,
2706 .hangup = stl_hangup,
2707 .flush_buffer = stl_flushbuffer,
2708 .break_ctl = stl_breakctl,
2709 .wait_until_sent = stl_waituntilsent,
2710 .send_xchar = stl_sendxchar,
2711 .read_proc = stl_readproc,
2712 .tiocmget = stl_tiocmget,
2713 .tiocmset = stl_tiocmset,
2714 };
2715
2716 /*****************************************************************************/
2717 /* CD1400 HARDWARE FUNCTIONS */
2718 /*****************************************************************************/
2719
2720 /*
2721 * These functions get/set/update the registers of the cd1400 UARTs.
2722 * Access to the cd1400 registers is via an address/data io port pair.
2723 * (Maybe should make this inline...)
2724 */
2725
2726 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2727 {
2728 outb((regnr + portp->uartaddr), portp->ioaddr);
2729 return inb(portp->ioaddr + EREG_DATA);
2730 }
2731
2732 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2733 {
2734 outb(regnr + portp->uartaddr, portp->ioaddr);
2735 outb(value, portp->ioaddr + EREG_DATA);
2736 }
2737
2738 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2739 {
2740 outb(regnr + portp->uartaddr, portp->ioaddr);
2741 if (inb(portp->ioaddr + EREG_DATA) != value) {
2742 outb(value, portp->ioaddr + EREG_DATA);
2743 return 1;
2744 }
2745 return 0;
2746 }
2747
2748 /*****************************************************************************/
2749
2750 /*
2751 * Inbitialize the UARTs in a panel. We don't care what sort of board
2752 * these ports are on - since the port io registers are almost
2753 * identical when dealing with ports.
2754 */
2755
2756 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2757 {
2758 unsigned int gfrcr;
2759 int chipmask, i, j;
2760 int nrchips, uartaddr, ioaddr;
2761 unsigned long flags;
2762
2763 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2764
2765 spin_lock_irqsave(&brd_lock, flags);
2766 BRDENABLE(panelp->brdnr, panelp->pagenr);
2767
2768 /*
2769 * Check that each chip is present and started up OK.
2770 */
2771 chipmask = 0;
2772 nrchips = panelp->nrports / CD1400_PORTS;
2773 for (i = 0; i < nrchips; i++) {
2774 if (brdp->brdtype == BRD_ECHPCI) {
2775 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2776 ioaddr = panelp->iobase;
2777 } else
2778 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2779 uartaddr = (i & 0x01) ? 0x080 : 0;
2780 outb((GFRCR + uartaddr), ioaddr);
2781 outb(0, (ioaddr + EREG_DATA));
2782 outb((CCR + uartaddr), ioaddr);
2783 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2784 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2785 outb((GFRCR + uartaddr), ioaddr);
2786 for (j = 0; j < CCR_MAXWAIT; j++)
2787 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2788 break;
2789
2790 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2791 printk("STALLION: cd1400 not responding, "
2792 "brd=%d panel=%d chip=%d\n",
2793 panelp->brdnr, panelp->panelnr, i);
2794 continue;
2795 }
2796 chipmask |= (0x1 << i);
2797 outb((PPR + uartaddr), ioaddr);
2798 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2799 }
2800
2801 BRDDISABLE(panelp->brdnr);
2802 spin_unlock_irqrestore(&brd_lock, flags);
2803 return chipmask;
2804 }
2805
2806 /*****************************************************************************/
2807
2808 /*
2809 * Initialize hardware specific port registers.
2810 */
2811
2812 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2813 {
2814 unsigned long flags;
2815 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2816 panelp, portp);
2817
2818 if ((brdp == NULL) || (panelp == NULL) ||
2819 (portp == NULL))
2820 return;
2821
2822 spin_lock_irqsave(&brd_lock, flags);
2823 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2824 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2825 portp->uartaddr = (portp->portnr & 0x04) << 5;
2826 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2827
2828 BRDENABLE(portp->brdnr, portp->pagenr);
2829 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2830 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2831 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2832 BRDDISABLE(portp->brdnr);
2833 spin_unlock_irqrestore(&brd_lock, flags);
2834 }
2835
2836 /*****************************************************************************/
2837
2838 /*
2839 * Wait for the command register to be ready. We will poll this,
2840 * since it won't usually take too long to be ready.
2841 */
2842
2843 static void stl_cd1400ccrwait(struct stlport *portp)
2844 {
2845 int i;
2846
2847 for (i = 0; i < CCR_MAXWAIT; i++)
2848 if (stl_cd1400getreg(portp, CCR) == 0)
2849 return;
2850
2851 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2852 portp->portnr, portp->panelnr, portp->brdnr);
2853 }
2854
2855 /*****************************************************************************/
2856
2857 /*
2858 * Set up the cd1400 registers for a port based on the termios port
2859 * settings.
2860 */
2861
2862 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2863 {
2864 struct stlbrd *brdp;
2865 unsigned long flags;
2866 unsigned int clkdiv, baudrate;
2867 unsigned char cor1, cor2, cor3;
2868 unsigned char cor4, cor5, ccr;
2869 unsigned char srer, sreron, sreroff;
2870 unsigned char mcor1, mcor2, rtpr;
2871 unsigned char clk, div;
2872
2873 cor1 = 0;
2874 cor2 = 0;
2875 cor3 = 0;
2876 cor4 = 0;
2877 cor5 = 0;
2878 ccr = 0;
2879 rtpr = 0;
2880 clk = 0;
2881 div = 0;
2882 mcor1 = 0;
2883 mcor2 = 0;
2884 sreron = 0;
2885 sreroff = 0;
2886
2887 brdp = stl_brds[portp->brdnr];
2888 if (brdp == NULL)
2889 return;
2890
2891 /*
2892 * Set up the RX char ignore mask with those RX error types we
2893 * can ignore. We can get the cd1400 to help us out a little here,
2894 * it will ignore parity errors and breaks for us.
2895 */
2896 portp->rxignoremsk = 0;
2897 if (tiosp->c_iflag & IGNPAR) {
2898 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2899 cor1 |= COR1_PARIGNORE;
2900 }
2901 if (tiosp->c_iflag & IGNBRK) {
2902 portp->rxignoremsk |= ST_BREAK;
2903 cor4 |= COR4_IGNBRK;
2904 }
2905
2906 portp->rxmarkmsk = ST_OVERRUN;
2907 if (tiosp->c_iflag & (INPCK | PARMRK))
2908 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2909 if (tiosp->c_iflag & BRKINT)
2910 portp->rxmarkmsk |= ST_BREAK;
2911
2912 /*
2913 * Go through the char size, parity and stop bits and set all the
2914 * option register appropriately.
2915 */
2916 switch (tiosp->c_cflag & CSIZE) {
2917 case CS5:
2918 cor1 |= COR1_CHL5;
2919 break;
2920 case CS6:
2921 cor1 |= COR1_CHL6;
2922 break;
2923 case CS7:
2924 cor1 |= COR1_CHL7;
2925 break;
2926 default:
2927 cor1 |= COR1_CHL8;
2928 break;
2929 }
2930
2931 if (tiosp->c_cflag & CSTOPB)
2932 cor1 |= COR1_STOP2;
2933 else
2934 cor1 |= COR1_STOP1;
2935
2936 if (tiosp->c_cflag & PARENB) {
2937 if (tiosp->c_cflag & PARODD)
2938 cor1 |= (COR1_PARENB | COR1_PARODD);
2939 else
2940 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2941 } else {
2942 cor1 |= COR1_PARNONE;
2943 }
2944
2945 /*
2946 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2947 * space for hardware flow control and the like. This should be set to
2948 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2949 * really be based on VTIME.
2950 */
2951 cor3 |= FIFO_RXTHRESHOLD;
2952 rtpr = 2;
2953
2954 /*
2955 * Calculate the baud rate timers. For now we will just assume that
2956 * the input and output baud are the same. Could have used a baud
2957 * table here, but this way we can generate virtually any baud rate
2958 * we like!
2959 */
2960 baudrate = tiosp->c_cflag & CBAUD;
2961 if (baudrate & CBAUDEX) {
2962 baudrate &= ~CBAUDEX;
2963 if ((baudrate < 1) || (baudrate > 4))
2964 tiosp->c_cflag &= ~CBAUDEX;
2965 else
2966 baudrate += 15;
2967 }
2968 baudrate = stl_baudrates[baudrate];
2969 if ((tiosp->c_cflag & CBAUD) == B38400) {
2970 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2971 baudrate = 57600;
2972 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2973 baudrate = 115200;
2974 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2975 baudrate = 230400;
2976 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2977 baudrate = 460800;
2978 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2979 baudrate = (portp->baud_base / portp->custom_divisor);
2980 }
2981 if (baudrate > STL_CD1400MAXBAUD)
2982 baudrate = STL_CD1400MAXBAUD;
2983
2984 if (baudrate > 0) {
2985 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2986 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2987 if (clkdiv < 0x100)
2988 break;
2989 }
2990 div = (unsigned char) clkdiv;
2991 }
2992
2993 /*
2994 * Check what form of modem signaling is required and set it up.
2995 */
2996 if ((tiosp->c_cflag & CLOCAL) == 0) {
2997 mcor1 |= MCOR1_DCD;
2998 mcor2 |= MCOR2_DCD;
2999 sreron |= SRER_MODEM;
3000 portp->flags |= ASYNC_CHECK_CD;
3001 } else
3002 portp->flags &= ~ASYNC_CHECK_CD;
3003
3004 /*
3005 * Setup cd1400 enhanced modes if we can. In particular we want to
3006 * handle as much of the flow control as possible automatically. As
3007 * well as saving a few CPU cycles it will also greatly improve flow
3008 * control reliability.
3009 */
3010 if (tiosp->c_iflag & IXON) {
3011 cor2 |= COR2_TXIBE;
3012 cor3 |= COR3_SCD12;
3013 if (tiosp->c_iflag & IXANY)
3014 cor2 |= COR2_IXM;
3015 }
3016
3017 if (tiosp->c_cflag & CRTSCTS) {
3018 cor2 |= COR2_CTSAE;
3019 mcor1 |= FIFO_RTSTHRESHOLD;
3020 }
3021
3022 /*
3023 * All cd1400 register values calculated so go through and set
3024 * them all up.
3025 */
3026
3027 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3028 portp->portnr, portp->panelnr, portp->brdnr);
3029 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3030 cor1, cor2, cor3, cor4, cor5);
3031 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3032 mcor1, mcor2, rtpr, sreron, sreroff);
3033 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3034 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3035 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3036 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3037
3038 spin_lock_irqsave(&brd_lock, flags);
3039 BRDENABLE(portp->brdnr, portp->pagenr);
3040 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3041 srer = stl_cd1400getreg(portp, SRER);
3042 stl_cd1400setreg(portp, SRER, 0);
3043 if (stl_cd1400updatereg(portp, COR1, cor1))
3044 ccr = 1;
3045 if (stl_cd1400updatereg(portp, COR2, cor2))
3046 ccr = 1;
3047 if (stl_cd1400updatereg(portp, COR3, cor3))
3048 ccr = 1;
3049 if (ccr) {
3050 stl_cd1400ccrwait(portp);
3051 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3052 }
3053 stl_cd1400setreg(portp, COR4, cor4);
3054 stl_cd1400setreg(portp, COR5, cor5);
3055 stl_cd1400setreg(portp, MCOR1, mcor1);
3056 stl_cd1400setreg(portp, MCOR2, mcor2);
3057 if (baudrate > 0) {
3058 stl_cd1400setreg(portp, TCOR, clk);
3059 stl_cd1400setreg(portp, TBPR, div);
3060 stl_cd1400setreg(portp, RCOR, clk);
3061 stl_cd1400setreg(portp, RBPR, div);
3062 }
3063 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3064 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3065 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3066 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3067 stl_cd1400setreg(portp, RTPR, rtpr);
3068 mcor1 = stl_cd1400getreg(portp, MSVR1);
3069 if (mcor1 & MSVR1_DCD)
3070 portp->sigs |= TIOCM_CD;
3071 else
3072 portp->sigs &= ~TIOCM_CD;
3073 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3074 BRDDISABLE(portp->brdnr);
3075 spin_unlock_irqrestore(&brd_lock, flags);
3076 }
3077
3078 /*****************************************************************************/
3079
3080 /*
3081 * Set the state of the DTR and RTS signals.
3082 */
3083
3084 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3085 {
3086 unsigned char msvr1, msvr2;
3087 unsigned long flags;
3088
3089 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3090 portp, dtr, rts);
3091
3092 msvr1 = 0;
3093 msvr2 = 0;
3094 if (dtr > 0)
3095 msvr1 = MSVR1_DTR;
3096 if (rts > 0)
3097 msvr2 = MSVR2_RTS;
3098
3099 spin_lock_irqsave(&brd_lock, flags);
3100 BRDENABLE(portp->brdnr, portp->pagenr);
3101 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3102 if (rts >= 0)
3103 stl_cd1400setreg(portp, MSVR2, msvr2);
3104 if (dtr >= 0)
3105 stl_cd1400setreg(portp, MSVR1, msvr1);
3106 BRDDISABLE(portp->brdnr);
3107 spin_unlock_irqrestore(&brd_lock, flags);
3108 }
3109
3110 /*****************************************************************************/
3111
3112 /*
3113 * Return the state of the signals.
3114 */
3115
3116 static int stl_cd1400getsignals(struct stlport *portp)
3117 {
3118 unsigned char msvr1, msvr2;
3119 unsigned long flags;
3120 int sigs;
3121
3122 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3123
3124 spin_lock_irqsave(&brd_lock, flags);
3125 BRDENABLE(portp->brdnr, portp->pagenr);
3126 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3127 msvr1 = stl_cd1400getreg(portp, MSVR1);
3128 msvr2 = stl_cd1400getreg(portp, MSVR2);
3129 BRDDISABLE(portp->brdnr);
3130 spin_unlock_irqrestore(&brd_lock, flags);
3131
3132 sigs = 0;
3133 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3134 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3135 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3136 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3137 #if 0
3138 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3139 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3140 #else
3141 sigs |= TIOCM_DSR;
3142 #endif
3143 return sigs;
3144 }
3145
3146 /*****************************************************************************/
3147
3148 /*
3149 * Enable/Disable the Transmitter and/or Receiver.
3150 */
3151
3152 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3153 {
3154 unsigned char ccr;
3155 unsigned long flags;
3156
3157 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3158
3159 ccr = 0;
3160
3161 if (tx == 0)
3162 ccr |= CCR_TXDISABLE;
3163 else if (tx > 0)
3164 ccr |= CCR_TXENABLE;
3165 if (rx == 0)
3166 ccr |= CCR_RXDISABLE;
3167 else if (rx > 0)
3168 ccr |= CCR_RXENABLE;
3169
3170 spin_lock_irqsave(&brd_lock, flags);
3171 BRDENABLE(portp->brdnr, portp->pagenr);
3172 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3173 stl_cd1400ccrwait(portp);
3174 stl_cd1400setreg(portp, CCR, ccr);
3175 stl_cd1400ccrwait(portp);
3176 BRDDISABLE(portp->brdnr);
3177 spin_unlock_irqrestore(&brd_lock, flags);
3178 }
3179
3180 /*****************************************************************************/
3181
3182 /*
3183 * Start/stop the Transmitter and/or Receiver.
3184 */
3185
3186 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3187 {
3188 unsigned char sreron, sreroff;
3189 unsigned long flags;
3190
3191 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3192
3193 sreron = 0;
3194 sreroff = 0;
3195 if (tx == 0)
3196 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3197 else if (tx == 1)
3198 sreron |= SRER_TXDATA;
3199 else if (tx >= 2)
3200 sreron |= SRER_TXEMPTY;
3201 if (rx == 0)
3202 sreroff |= SRER_RXDATA;
3203 else if (rx > 0)
3204 sreron |= SRER_RXDATA;
3205
3206 spin_lock_irqsave(&brd_lock, flags);
3207 BRDENABLE(portp->brdnr, portp->pagenr);
3208 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3209 stl_cd1400setreg(portp, SRER,
3210 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3211 BRDDISABLE(portp->brdnr);
3212 if (tx > 0)
3213 set_bit(ASYI_TXBUSY, &portp->istate);
3214 spin_unlock_irqrestore(&brd_lock, flags);
3215 }
3216
3217 /*****************************************************************************/
3218
3219 /*
3220 * Disable all interrupts from this port.
3221 */
3222
3223 static void stl_cd1400disableintrs(struct stlport *portp)
3224 {
3225 unsigned long flags;
3226
3227 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3228
3229 spin_lock_irqsave(&brd_lock, flags);
3230 BRDENABLE(portp->brdnr, portp->pagenr);
3231 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3232 stl_cd1400setreg(portp, SRER, 0);
3233 BRDDISABLE(portp->brdnr);
3234 spin_unlock_irqrestore(&brd_lock, flags);
3235 }
3236
3237 /*****************************************************************************/
3238
3239 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3240 {
3241 unsigned long flags;
3242
3243 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3244
3245 spin_lock_irqsave(&brd_lock, flags);
3246 BRDENABLE(portp->brdnr, portp->pagenr);
3247 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3248 stl_cd1400setreg(portp, SRER,
3249 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3250 SRER_TXEMPTY));
3251 BRDDISABLE(portp->brdnr);
3252 portp->brklen = len;
3253 if (len == 1)
3254 portp->stats.txbreaks++;
3255 spin_unlock_irqrestore(&brd_lock, flags);
3256 }
3257
3258 /*****************************************************************************/
3259
3260 /*
3261 * Take flow control actions...
3262 */
3263
3264 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3265 {
3266 struct tty_struct *tty;
3267 unsigned long flags;
3268
3269 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3270
3271 if (portp == NULL)
3272 return;
3273 tty = portp->tty;
3274 if (tty == NULL)
3275 return;
3276
3277 spin_lock_irqsave(&brd_lock, flags);
3278 BRDENABLE(portp->brdnr, portp->pagenr);
3279 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3280
3281 if (state) {
3282 if (tty->termios->c_iflag & IXOFF) {
3283 stl_cd1400ccrwait(portp);
3284 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3285 portp->stats.rxxon++;
3286 stl_cd1400ccrwait(portp);
3287 }
3288 /*
3289 * Question: should we return RTS to what it was before? It may
3290 * have been set by an ioctl... Suppose not, since if you have
3291 * hardware flow control set then it is pretty silly to go and
3292 * set the RTS line by hand.
3293 */
3294 if (tty->termios->c_cflag & CRTSCTS) {
3295 stl_cd1400setreg(portp, MCOR1,
3296 (stl_cd1400getreg(portp, MCOR1) |
3297 FIFO_RTSTHRESHOLD));
3298 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3299 portp->stats.rxrtson++;
3300 }
3301 } else {
3302 if (tty->termios->c_iflag & IXOFF) {
3303 stl_cd1400ccrwait(portp);
3304 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3305 portp->stats.rxxoff++;
3306 stl_cd1400ccrwait(portp);
3307 }
3308 if (tty->termios->c_cflag & CRTSCTS) {
3309 stl_cd1400setreg(portp, MCOR1,
3310 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3311 stl_cd1400setreg(portp, MSVR2, 0);
3312 portp->stats.rxrtsoff++;
3313 }
3314 }
3315
3316 BRDDISABLE(portp->brdnr);
3317 spin_unlock_irqrestore(&brd_lock, flags);
3318 }
3319
3320 /*****************************************************************************/
3321
3322 /*
3323 * Send a flow control character...
3324 */
3325
3326 static void stl_cd1400sendflow(struct stlport *portp, int state)
3327 {
3328 struct tty_struct *tty;
3329 unsigned long flags;
3330
3331 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3332
3333 if (portp == NULL)
3334 return;
3335 tty = portp->tty;
3336 if (tty == NULL)
3337 return;
3338
3339 spin_lock_irqsave(&brd_lock, flags);
3340 BRDENABLE(portp->brdnr, portp->pagenr);
3341 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3342 if (state) {
3343 stl_cd1400ccrwait(portp);
3344 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3345 portp->stats.rxxon++;
3346 stl_cd1400ccrwait(portp);
3347 } else {
3348 stl_cd1400ccrwait(portp);
3349 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3350 portp->stats.rxxoff++;
3351 stl_cd1400ccrwait(portp);
3352 }
3353 BRDDISABLE(portp->brdnr);
3354 spin_unlock_irqrestore(&brd_lock, flags);
3355 }
3356
3357 /*****************************************************************************/
3358
3359 static void stl_cd1400flush(struct stlport *portp)
3360 {
3361 unsigned long flags;
3362
3363 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3364
3365 if (portp == NULL)
3366 return;
3367
3368 spin_lock_irqsave(&brd_lock, flags);
3369 BRDENABLE(portp->brdnr, portp->pagenr);
3370 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3371 stl_cd1400ccrwait(portp);
3372 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3373 stl_cd1400ccrwait(portp);
3374 portp->tx.tail = portp->tx.head;
3375 BRDDISABLE(portp->brdnr);
3376 spin_unlock_irqrestore(&brd_lock, flags);
3377 }
3378
3379 /*****************************************************************************/
3380
3381 /*
3382 * Return the current state of data flow on this port. This is only
3383 * really interresting when determining if data has fully completed
3384 * transmission or not... This is easy for the cd1400, it accurately
3385 * maintains the busy port flag.
3386 */
3387
3388 static int stl_cd1400datastate(struct stlport *portp)
3389 {
3390 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3391
3392 if (portp == NULL)
3393 return 0;
3394
3395 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3396 }
3397
3398 /*****************************************************************************/
3399
3400 /*
3401 * Interrupt service routine for cd1400 EasyIO boards.
3402 */
3403
3404 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3405 {
3406 unsigned char svrtype;
3407
3408 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3409
3410 spin_lock(&brd_lock);
3411 outb(SVRR, iobase);
3412 svrtype = inb(iobase + EREG_DATA);
3413 if (panelp->nrports > 4) {
3414 outb((SVRR + 0x80), iobase);
3415 svrtype |= inb(iobase + EREG_DATA);
3416 }
3417
3418 if (svrtype & SVRR_RX)
3419 stl_cd1400rxisr(panelp, iobase);
3420 else if (svrtype & SVRR_TX)
3421 stl_cd1400txisr(panelp, iobase);
3422 else if (svrtype & SVRR_MDM)
3423 stl_cd1400mdmisr(panelp, iobase);
3424
3425 spin_unlock(&brd_lock);
3426 }
3427
3428 /*****************************************************************************/
3429
3430 /*
3431 * Interrupt service routine for cd1400 panels.
3432 */
3433
3434 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3435 {
3436 unsigned char svrtype;
3437
3438 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3439
3440 outb(SVRR, iobase);
3441 svrtype = inb(iobase + EREG_DATA);
3442 outb((SVRR + 0x80), iobase);
3443 svrtype |= inb(iobase + EREG_DATA);
3444 if (svrtype & SVRR_RX)
3445 stl_cd1400rxisr(panelp, iobase);
3446 else if (svrtype & SVRR_TX)
3447 stl_cd1400txisr(panelp, iobase);
3448 else if (svrtype & SVRR_MDM)
3449 stl_cd1400mdmisr(panelp, iobase);
3450 }
3451
3452
3453 /*****************************************************************************/
3454
3455 /*
3456 * Unfortunately we need to handle breaks in the TX data stream, since
3457 * this is the only way to generate them on the cd1400.
3458 */
3459
3460 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3461 {
3462 if (portp->brklen == 1) {
3463 outb((COR2 + portp->uartaddr), ioaddr);
3464 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3465 (ioaddr + EREG_DATA));
3466 outb((TDR + portp->uartaddr), ioaddr);
3467 outb(ETC_CMD, (ioaddr + EREG_DATA));
3468 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3469 outb((SRER + portp->uartaddr), ioaddr);
3470 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3471 (ioaddr + EREG_DATA));
3472 return 1;
3473 } else if (portp->brklen > 1) {
3474 outb((TDR + portp->uartaddr), ioaddr);
3475 outb(ETC_CMD, (ioaddr + EREG_DATA));
3476 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3477 portp->brklen = -1;
3478 return 1;
3479 } else {
3480 outb((COR2 + portp->uartaddr), ioaddr);
3481 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3482 (ioaddr + EREG_DATA));
3483 portp->brklen = 0;
3484 }
3485 return 0;
3486 }
3487
3488 /*****************************************************************************/
3489
3490 /*
3491 * Transmit interrupt handler. This has gotta be fast! Handling TX
3492 * chars is pretty simple, stuff as many as possible from the TX buffer
3493 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3494 * are embedded as commands in the data stream. Oh no, had to use a goto!
3495 * This could be optimized more, will do when I get time...
3496 * In practice it is possible that interrupts are enabled but that the
3497 * port has been hung up. Need to handle not having any TX buffer here,
3498 * this is done by using the side effect that head and tail will also
3499 * be NULL if the buffer has been freed.
3500 */
3501
3502 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3503 {
3504 struct stlport *portp;
3505 int len, stlen;
3506 char *head, *tail;
3507 unsigned char ioack, srer;
3508
3509 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3510
3511 ioack = inb(ioaddr + EREG_TXACK);
3512 if (((ioack & panelp->ackmask) != 0) ||
3513 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3514 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3515 return;
3516 }
3517 portp = panelp->ports[(ioack >> 3)];
3518
3519 /*
3520 * Unfortunately we need to handle breaks in the data stream, since
3521 * this is the only way to generate them on the cd1400. Do it now if
3522 * a break is to be sent.
3523 */
3524 if (portp->brklen != 0)
3525 if (stl_cd1400breakisr(portp, ioaddr))
3526 goto stl_txalldone;
3527
3528 head = portp->tx.head;
3529 tail = portp->tx.tail;
3530 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3531 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3532 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3533 set_bit(ASYI_TXLOW, &portp->istate);
3534 schedule_work(&portp->tqueue);
3535 }
3536
3537 if (len == 0) {
3538 outb((SRER + portp->uartaddr), ioaddr);
3539 srer = inb(ioaddr + EREG_DATA);
3540 if (srer & SRER_TXDATA) {
3541 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3542 } else {
3543 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3544 clear_bit(ASYI_TXBUSY, &portp->istate);
3545 }
3546 outb(srer, (ioaddr + EREG_DATA));
3547 } else {
3548 len = min(len, CD1400_TXFIFOSIZE);
3549 portp->stats.txtotal += len;
3550 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3551 outb((TDR + portp->uartaddr), ioaddr);
3552 outsb((ioaddr + EREG_DATA), tail, stlen);
3553 len -= stlen;
3554 tail += stlen;
3555 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3556 tail = portp->tx.buf;
3557 if (len > 0) {
3558 outsb((ioaddr + EREG_DATA), tail, len);
3559 tail += len;
3560 }
3561 portp->tx.tail = tail;
3562 }
3563
3564 stl_txalldone:
3565 outb((EOSRR + portp->uartaddr), ioaddr);
3566 outb(0, (ioaddr + EREG_DATA));
3567 }
3568
3569 /*****************************************************************************/
3570
3571 /*
3572 * Receive character interrupt handler. Determine if we have good chars
3573 * or bad chars and then process appropriately. Good chars are easy
3574 * just shove the lot into the RX buffer and set all status byte to 0.
3575 * If a bad RX char then process as required. This routine needs to be
3576 * fast! In practice it is possible that we get an interrupt on a port
3577 * that is closed. This can happen on hangups - since they completely
3578 * shutdown a port not in user context. Need to handle this case.
3579 */
3580
3581 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3582 {
3583 struct stlport *portp;
3584 struct tty_struct *tty;
3585 unsigned int ioack, len, buflen;
3586 unsigned char status;
3587 char ch;
3588
3589 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3590
3591 ioack = inb(ioaddr + EREG_RXACK);
3592 if ((ioack & panelp->ackmask) != 0) {
3593 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3594 return;
3595 }
3596 portp = panelp->ports[(ioack >> 3)];
3597 tty = portp->tty;
3598
3599 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3600 outb((RDCR + portp->uartaddr), ioaddr);
3601 len = inb(ioaddr + EREG_DATA);
3602 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3603 len = min(len, sizeof(stl_unwanted));
3604 outb((RDSR + portp->uartaddr), ioaddr);
3605 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3606 portp->stats.rxlost += len;
3607 portp->stats.rxtotal += len;
3608 } else {
3609 len = min(len, buflen);
3610 if (len > 0) {
3611 unsigned char *ptr;
3612 outb((RDSR + portp->uartaddr), ioaddr);
3613 tty_prepare_flip_string(tty, &ptr, len);
3614 insb((ioaddr + EREG_DATA), ptr, len);
3615 tty_schedule_flip(tty);
3616 portp->stats.rxtotal += len;
3617 }
3618 }
3619 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3620 outb((RDSR + portp->uartaddr), ioaddr);
3621 status = inb(ioaddr + EREG_DATA);
3622 ch = inb(ioaddr + EREG_DATA);
3623 if (status & ST_PARITY)
3624 portp->stats.rxparity++;
3625 if (status & ST_FRAMING)
3626 portp->stats.rxframing++;
3627 if (status & ST_OVERRUN)
3628 portp->stats.rxoverrun++;
3629 if (status & ST_BREAK)
3630 portp->stats.rxbreaks++;
3631 if (status & ST_SCHARMASK) {
3632 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3633 portp->stats.txxon++;
3634 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3635 portp->stats.txxoff++;
3636 goto stl_rxalldone;
3637 }
3638 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3639 if (portp->rxmarkmsk & status) {
3640 if (status & ST_BREAK) {
3641 status = TTY_BREAK;
3642 if (portp->flags & ASYNC_SAK) {
3643 do_SAK(tty);
3644 BRDENABLE(portp->brdnr, portp->pagenr);
3645 }
3646 } else if (status & ST_PARITY)
3647 status = TTY_PARITY;
3648 else if (status & ST_FRAMING)
3649 status = TTY_FRAME;
3650 else if(status & ST_OVERRUN)
3651 status = TTY_OVERRUN;
3652 else
3653 status = 0;
3654 } else
3655 status = 0;
3656 tty_insert_flip_char(tty, ch, status);
3657 tty_schedule_flip(tty);
3658 }
3659 } else {
3660 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3661 return;
3662 }
3663
3664 stl_rxalldone:
3665 outb((EOSRR + portp->uartaddr), ioaddr);
3666 outb(0, (ioaddr + EREG_DATA));
3667 }
3668
3669 /*****************************************************************************/
3670
3671 /*
3672 * Modem interrupt handler. The is called when the modem signal line
3673 * (DCD) has changed state. Leave most of the work to the off-level
3674 * processing routine.
3675 */
3676
3677 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3678 {
3679 struct stlport *portp;
3680 unsigned int ioack;
3681 unsigned char misr;
3682
3683 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3684
3685 ioack = inb(ioaddr + EREG_MDACK);
3686 if (((ioack & panelp->ackmask) != 0) ||
3687 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3688 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3689 return;
3690 }
3691 portp = panelp->ports[(ioack >> 3)];
3692
3693 outb((MISR + portp->uartaddr), ioaddr);
3694 misr = inb(ioaddr + EREG_DATA);
3695 if (misr & MISR_DCD) {
3696 set_bit(ASYI_DCDCHANGE, &portp->istate);
3697 schedule_work(&portp->tqueue);
3698 portp->stats.modem++;
3699 }
3700
3701 outb((EOSRR + portp->uartaddr), ioaddr);
3702 outb(0, (ioaddr + EREG_DATA));
3703 }
3704
3705 /*****************************************************************************/
3706 /* SC26198 HARDWARE FUNCTIONS */
3707 /*****************************************************************************/
3708
3709 /*
3710 * These functions get/set/update the registers of the sc26198 UARTs.
3711 * Access to the sc26198 registers is via an address/data io port pair.
3712 * (Maybe should make this inline...)
3713 */
3714
3715 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3716 {
3717 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3718 return inb(portp->ioaddr + XP_DATA);
3719 }
3720
3721 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3722 {
3723 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3724 outb(value, (portp->ioaddr + XP_DATA));
3725 }
3726
3727 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3728 {
3729 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3730 if (inb(portp->ioaddr + XP_DATA) != value) {
3731 outb(value, (portp->ioaddr + XP_DATA));
3732 return 1;
3733 }
3734 return 0;
3735 }
3736
3737 /*****************************************************************************/
3738
3739 /*
3740 * Functions to get and set the sc26198 global registers.
3741 */
3742
3743 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3744 {
3745 outb(regnr, (portp->ioaddr + XP_ADDR));
3746 return inb(portp->ioaddr + XP_DATA);
3747 }
3748
3749 #if 0
3750 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3751 {
3752 outb(regnr, (portp->ioaddr + XP_ADDR));
3753 outb(value, (portp->ioaddr + XP_DATA));
3754 }
3755 #endif
3756
3757 /*****************************************************************************/
3758
3759 /*
3760 * Inbitialize the UARTs in a panel. We don't care what sort of board
3761 * these ports are on - since the port io registers are almost
3762 * identical when dealing with ports.
3763 */
3764
3765 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3766 {
3767 int chipmask, i;
3768 int nrchips, ioaddr;
3769
3770 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3771
3772 BRDENABLE(panelp->brdnr, panelp->pagenr);
3773
3774 /*
3775 * Check that each chip is present and started up OK.
3776 */
3777 chipmask = 0;
3778 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3779 if (brdp->brdtype == BRD_ECHPCI)
3780 outb(panelp->pagenr, brdp->ioctrl);
3781
3782 for (i = 0; i < nrchips; i++) {
3783 ioaddr = panelp->iobase + (i * 4);
3784 outb(SCCR, (ioaddr + XP_ADDR));
3785 outb(CR_RESETALL, (ioaddr + XP_DATA));
3786 outb(TSTR, (ioaddr + XP_ADDR));
3787 if (inb(ioaddr + XP_DATA) != 0) {
3788 printk("STALLION: sc26198 not responding, "
3789 "brd=%d panel=%d chip=%d\n",
3790 panelp->brdnr, panelp->panelnr, i);
3791 continue;
3792 }
3793 chipmask |= (0x1 << i);
3794 outb(GCCR, (ioaddr + XP_ADDR));
3795 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3796 outb(WDTRCR, (ioaddr + XP_ADDR));
3797 outb(0xff, (ioaddr + XP_DATA));
3798 }
3799
3800 BRDDISABLE(panelp->brdnr);
3801 return chipmask;
3802 }
3803
3804 /*****************************************************************************/
3805
3806 /*
3807 * Initialize hardware specific port registers.
3808 */
3809
3810 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3811 {
3812 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3813 panelp, portp);
3814
3815 if ((brdp == NULL) || (panelp == NULL) ||
3816 (portp == NULL))
3817 return;
3818
3819 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3820 portp->uartaddr = (portp->portnr & 0x07) << 4;
3821 portp->pagenr = panelp->pagenr;
3822 portp->hwid = 0x1;
3823
3824 BRDENABLE(portp->brdnr, portp->pagenr);
3825 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3826 BRDDISABLE(portp->brdnr);
3827 }
3828
3829 /*****************************************************************************/
3830
3831 /*
3832 * Set up the sc26198 registers for a port based on the termios port
3833 * settings.
3834 */
3835
3836 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3837 {
3838 struct stlbrd *brdp;
3839 unsigned long flags;
3840 unsigned int baudrate;
3841 unsigned char mr0, mr1, mr2, clk;
3842 unsigned char imron, imroff, iopr, ipr;
3843
3844 mr0 = 0;
3845 mr1 = 0;
3846 mr2 = 0;
3847 clk = 0;
3848 iopr = 0;
3849 imron = 0;
3850 imroff = 0;
3851
3852 brdp = stl_brds[portp->brdnr];
3853 if (brdp == NULL)
3854 return;
3855
3856 /*
3857 * Set up the RX char ignore mask with those RX error types we
3858 * can ignore.
3859 */
3860 portp->rxignoremsk = 0;
3861 if (tiosp->c_iflag & IGNPAR)
3862 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3863 SR_RXOVERRUN);
3864 if (tiosp->c_iflag & IGNBRK)
3865 portp->rxignoremsk |= SR_RXBREAK;
3866
3867 portp->rxmarkmsk = SR_RXOVERRUN;
3868 if (tiosp->c_iflag & (INPCK | PARMRK))
3869 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3870 if (tiosp->c_iflag & BRKINT)
3871 portp->rxmarkmsk |= SR_RXBREAK;
3872
3873 /*
3874 * Go through the char size, parity and stop bits and set all the
3875 * option register appropriately.
3876 */
3877 switch (tiosp->c_cflag & CSIZE) {
3878 case CS5:
3879 mr1 |= MR1_CS5;
3880 break;
3881 case CS6:
3882 mr1 |= MR1_CS6;
3883 break;
3884 case CS7:
3885 mr1 |= MR1_CS7;
3886 break;
3887 default:
3888 mr1 |= MR1_CS8;
3889 break;
3890 }
3891
3892 if (tiosp->c_cflag & CSTOPB)
3893 mr2 |= MR2_STOP2;
3894 else
3895 mr2 |= MR2_STOP1;
3896
3897 if (tiosp->c_cflag & PARENB) {
3898 if (tiosp->c_cflag & PARODD)
3899 mr1 |= (MR1_PARENB | MR1_PARODD);
3900 else
3901 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3902 } else
3903 mr1 |= MR1_PARNONE;
3904
3905 mr1 |= MR1_ERRBLOCK;
3906
3907 /*
3908 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3909 * space for hardware flow control and the like. This should be set to
3910 * VMIN.
3911 */
3912 mr2 |= MR2_RXFIFOHALF;
3913
3914 /*
3915 * Calculate the baud rate timers. For now we will just assume that
3916 * the input and output baud are the same. The sc26198 has a fixed
3917 * baud rate table, so only discrete baud rates possible.
3918 */
3919 baudrate = tiosp->c_cflag & CBAUD;
3920 if (baudrate & CBAUDEX) {
3921 baudrate &= ~CBAUDEX;
3922 if ((baudrate < 1) || (baudrate > 4))
3923 tiosp->c_cflag &= ~CBAUDEX;
3924 else
3925 baudrate += 15;
3926 }
3927 baudrate = stl_baudrates[baudrate];
3928 if ((tiosp->c_cflag & CBAUD) == B38400) {
3929 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3930 baudrate = 57600;
3931 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3932 baudrate = 115200;
3933 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3934 baudrate = 230400;
3935 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3936 baudrate = 460800;
3937 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3938 baudrate = (portp->baud_base / portp->custom_divisor);
3939 }
3940 if (baudrate > STL_SC26198MAXBAUD)
3941 baudrate = STL_SC26198MAXBAUD;
3942
3943 if (baudrate > 0)
3944 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3945 if (baudrate <= sc26198_baudtable[clk])
3946 break;
3947
3948 /*
3949 * Check what form of modem signaling is required and set it up.
3950 */
3951 if (tiosp->c_cflag & CLOCAL) {
3952 portp->flags &= ~ASYNC_CHECK_CD;
3953 } else {
3954 iopr |= IOPR_DCDCOS;
3955 imron |= IR_IOPORT;
3956 portp->flags |= ASYNC_CHECK_CD;
3957 }
3958
3959 /*
3960 * Setup sc26198 enhanced modes if we can. In particular we want to
3961 * handle as much of the flow control as possible automatically. As
3962 * well as saving a few CPU cycles it will also greatly improve flow
3963 * control reliability.
3964 */
3965 if (tiosp->c_iflag & IXON) {
3966 mr0 |= MR0_SWFTX | MR0_SWFT;
3967 imron |= IR_XONXOFF;
3968 } else
3969 imroff |= IR_XONXOFF;
3970
3971 if (tiosp->c_iflag & IXOFF)
3972 mr0 |= MR0_SWFRX;
3973
3974 if (tiosp->c_cflag & CRTSCTS) {
3975 mr2 |= MR2_AUTOCTS;
3976 mr1 |= MR1_AUTORTS;
3977 }
3978
3979 /*
3980 * All sc26198 register values calculated so go through and set
3981 * them all up.
3982 */
3983
3984 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3985 portp->portnr, portp->panelnr, portp->brdnr);
3986 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3987 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3988 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3989 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3990 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3991
3992 spin_lock_irqsave(&brd_lock, flags);
3993 BRDENABLE(portp->brdnr, portp->pagenr);
3994 stl_sc26198setreg(portp, IMR, 0);
3995 stl_sc26198updatereg(portp, MR0, mr0);
3996 stl_sc26198updatereg(portp, MR1, mr1);
3997 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3998 stl_sc26198updatereg(portp, MR2, mr2);
3999 stl_sc26198updatereg(portp, IOPIOR,
4000 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4001
4002 if (baudrate > 0) {
4003 stl_sc26198setreg(portp, TXCSR, clk);
4004 stl_sc26198setreg(portp, RXCSR, clk);
4005 }
4006
4007 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4008 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4009
4010 ipr = stl_sc26198getreg(portp, IPR);
4011 if (ipr & IPR_DCD)
4012 portp->sigs &= ~TIOCM_CD;
4013 else
4014 portp->sigs |= TIOCM_CD;
4015
4016 portp->imr = (portp->imr & ~imroff) | imron;
4017 stl_sc26198setreg(portp, IMR, portp->imr);
4018 BRDDISABLE(portp->brdnr);
4019 spin_unlock_irqrestore(&brd_lock, flags);
4020 }
4021
4022 /*****************************************************************************/
4023
4024 /*
4025 * Set the state of the DTR and RTS signals.
4026 */
4027
4028 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4029 {
4030 unsigned char iopioron, iopioroff;
4031 unsigned long flags;
4032
4033 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4034 dtr, rts);
4035
4036 iopioron = 0;
4037 iopioroff = 0;
4038 if (dtr == 0)
4039 iopioroff |= IPR_DTR;
4040 else if (dtr > 0)
4041 iopioron |= IPR_DTR;
4042 if (rts == 0)
4043 iopioroff |= IPR_RTS;
4044 else if (rts > 0)
4045 iopioron |= IPR_RTS;
4046
4047 spin_lock_irqsave(&brd_lock, flags);
4048 BRDENABLE(portp->brdnr, portp->pagenr);
4049 stl_sc26198setreg(portp, IOPIOR,
4050 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4051 BRDDISABLE(portp->brdnr);
4052 spin_unlock_irqrestore(&brd_lock, flags);
4053 }
4054
4055 /*****************************************************************************/
4056
4057 /*
4058 * Return the state of the signals.
4059 */
4060
4061 static int stl_sc26198getsignals(struct stlport *portp)
4062 {
4063 unsigned char ipr;
4064 unsigned long flags;
4065 int sigs;
4066
4067 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4068
4069 spin_lock_irqsave(&brd_lock, flags);
4070 BRDENABLE(portp->brdnr, portp->pagenr);
4071 ipr = stl_sc26198getreg(portp, IPR);
4072 BRDDISABLE(portp->brdnr);
4073 spin_unlock_irqrestore(&brd_lock, flags);
4074
4075 sigs = 0;
4076 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4077 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4078 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4079 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4080 sigs |= TIOCM_DSR;
4081 return sigs;
4082 }
4083
4084 /*****************************************************************************/
4085
4086 /*
4087 * Enable/Disable the Transmitter and/or Receiver.
4088 */
4089
4090 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4091 {
4092 unsigned char ccr;
4093 unsigned long flags;
4094
4095 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4096
4097 ccr = portp->crenable;
4098 if (tx == 0)
4099 ccr &= ~CR_TXENABLE;
4100 else if (tx > 0)
4101 ccr |= CR_TXENABLE;
4102 if (rx == 0)
4103 ccr &= ~CR_RXENABLE;
4104 else if (rx > 0)
4105 ccr |= CR_RXENABLE;
4106
4107 spin_lock_irqsave(&brd_lock, flags);
4108 BRDENABLE(portp->brdnr, portp->pagenr);
4109 stl_sc26198setreg(portp, SCCR, ccr);
4110 BRDDISABLE(portp->brdnr);
4111 portp->crenable = ccr;
4112 spin_unlock_irqrestore(&brd_lock, flags);
4113 }
4114
4115 /*****************************************************************************/
4116
4117 /*
4118 * Start/stop the Transmitter and/or Receiver.
4119 */
4120
4121 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4122 {
4123 unsigned char imr;
4124 unsigned long flags;
4125
4126 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4127
4128 imr = portp->imr;
4129 if (tx == 0)
4130 imr &= ~IR_TXRDY;
4131 else if (tx == 1)
4132 imr |= IR_TXRDY;
4133 if (rx == 0)
4134 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4135 else if (rx > 0)
4136 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4137
4138 spin_lock_irqsave(&brd_lock, flags);
4139 BRDENABLE(portp->brdnr, portp->pagenr);
4140 stl_sc26198setreg(portp, IMR, imr);
4141 BRDDISABLE(portp->brdnr);
4142 portp->imr = imr;
4143 if (tx > 0)
4144 set_bit(ASYI_TXBUSY, &portp->istate);
4145 spin_unlock_irqrestore(&brd_lock, flags);
4146 }
4147
4148 /*****************************************************************************/
4149
4150 /*
4151 * Disable all interrupts from this port.
4152 */
4153
4154 static void stl_sc26198disableintrs(struct stlport *portp)
4155 {
4156 unsigned long flags;
4157
4158 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4159
4160 spin_lock_irqsave(&brd_lock, flags);
4161 BRDENABLE(portp->brdnr, portp->pagenr);
4162 portp->imr = 0;
4163 stl_sc26198setreg(portp, IMR, 0);
4164 BRDDISABLE(portp->brdnr);
4165 spin_unlock_irqrestore(&brd_lock, flags);
4166 }
4167
4168 /*****************************************************************************/
4169
4170 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4171 {
4172 unsigned long flags;
4173
4174 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4175
4176 spin_lock_irqsave(&brd_lock, flags);
4177 BRDENABLE(portp->brdnr, portp->pagenr);
4178 if (len == 1) {
4179 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4180 portp->stats.txbreaks++;
4181 } else
4182 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4183
4184 BRDDISABLE(portp->brdnr);
4185 spin_unlock_irqrestore(&brd_lock, flags);
4186 }
4187
4188 /*****************************************************************************/
4189
4190 /*
4191 * Take flow control actions...
4192 */
4193
4194 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4195 {
4196 struct tty_struct *tty;
4197 unsigned long flags;
4198 unsigned char mr0;
4199
4200 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4201
4202 if (portp == NULL)
4203 return;
4204 tty = portp->tty;
4205 if (tty == NULL)
4206 return;
4207
4208 spin_lock_irqsave(&brd_lock, flags);
4209 BRDENABLE(portp->brdnr, portp->pagenr);
4210
4211 if (state) {
4212 if (tty->termios->c_iflag & IXOFF) {
4213 mr0 = stl_sc26198getreg(portp, MR0);
4214 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4215 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4216 mr0 |= MR0_SWFRX;
4217 portp->stats.rxxon++;
4218 stl_sc26198wait(portp);
4219 stl_sc26198setreg(portp, MR0, mr0);
4220 }
4221 /*
4222 * Question: should we return RTS to what it was before? It may
4223 * have been set by an ioctl... Suppose not, since if you have
4224 * hardware flow control set then it is pretty silly to go and
4225 * set the RTS line by hand.
4226 */
4227 if (tty->termios->c_cflag & CRTSCTS) {
4228 stl_sc26198setreg(portp, MR1,
4229 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4230 stl_sc26198setreg(portp, IOPIOR,
4231 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4232 portp->stats.rxrtson++;
4233 }
4234 } else {
4235 if (tty->termios->c_iflag & IXOFF) {
4236 mr0 = stl_sc26198getreg(portp, MR0);
4237 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4238 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4239 mr0 &= ~MR0_SWFRX;
4240 portp->stats.rxxoff++;
4241 stl_sc26198wait(portp);
4242 stl_sc26198setreg(portp, MR0, mr0);
4243 }
4244 if (tty->termios->c_cflag & CRTSCTS) {
4245 stl_sc26198setreg(portp, MR1,
4246 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4247 stl_sc26198setreg(portp, IOPIOR,
4248 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4249 portp->stats.rxrtsoff++;
4250 }
4251 }
4252
4253 BRDDISABLE(portp->brdnr);
4254 spin_unlock_irqrestore(&brd_lock, flags);
4255 }
4256
4257 /*****************************************************************************/
4258
4259 /*
4260 * Send a flow control character.
4261 */
4262
4263 static void stl_sc26198sendflow(struct stlport *portp, int state)
4264 {
4265 struct tty_struct *tty;
4266 unsigned long flags;
4267 unsigned char mr0;
4268
4269 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4270
4271 if (portp == NULL)
4272 return;
4273 tty = portp->tty;
4274 if (tty == NULL)
4275 return;
4276
4277 spin_lock_irqsave(&brd_lock, flags);
4278 BRDENABLE(portp->brdnr, portp->pagenr);
4279 if (state) {
4280 mr0 = stl_sc26198getreg(portp, MR0);
4281 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4282 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4283 mr0 |= MR0_SWFRX;
4284 portp->stats.rxxon++;
4285 stl_sc26198wait(portp);
4286 stl_sc26198setreg(portp, MR0, mr0);
4287 } else {
4288 mr0 = stl_sc26198getreg(portp, MR0);
4289 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4290 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4291 mr0 &= ~MR0_SWFRX;
4292 portp->stats.rxxoff++;
4293 stl_sc26198wait(portp);
4294 stl_sc26198setreg(portp, MR0, mr0);
4295 }
4296 BRDDISABLE(portp->brdnr);
4297 spin_unlock_irqrestore(&brd_lock, flags);
4298 }
4299
4300 /*****************************************************************************/
4301
4302 static void stl_sc26198flush(struct stlport *portp)
4303 {
4304 unsigned long flags;
4305
4306 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4307
4308 if (portp == NULL)
4309 return;
4310
4311 spin_lock_irqsave(&brd_lock, flags);
4312 BRDENABLE(portp->brdnr, portp->pagenr);
4313 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4314 stl_sc26198setreg(portp, SCCR, portp->crenable);
4315 BRDDISABLE(portp->brdnr);
4316 portp->tx.tail = portp->tx.head;
4317 spin_unlock_irqrestore(&brd_lock, flags);
4318 }
4319
4320 /*****************************************************************************/
4321
4322 /*
4323 * Return the current state of data flow on this port. This is only
4324 * really interresting when determining if data has fully completed
4325 * transmission or not... The sc26198 interrupt scheme cannot
4326 * determine when all data has actually drained, so we need to
4327 * check the port statusy register to be sure.
4328 */
4329
4330 static int stl_sc26198datastate(struct stlport *portp)
4331 {
4332 unsigned long flags;
4333 unsigned char sr;
4334
4335 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4336
4337 if (portp == NULL)
4338 return 0;
4339 if (test_bit(ASYI_TXBUSY, &portp->istate))
4340 return 1;
4341
4342 spin_lock_irqsave(&brd_lock, flags);
4343 BRDENABLE(portp->brdnr, portp->pagenr);
4344 sr = stl_sc26198getreg(portp, SR);
4345 BRDDISABLE(portp->brdnr);
4346 spin_unlock_irqrestore(&brd_lock, flags);
4347
4348 return (sr & SR_TXEMPTY) ? 0 : 1;
4349 }
4350
4351 /*****************************************************************************/
4352
4353 /*
4354 * Delay for a small amount of time, to give the sc26198 a chance
4355 * to process a command...
4356 */
4357
4358 static void stl_sc26198wait(struct stlport *portp)
4359 {
4360 int i;
4361
4362 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4363
4364 if (portp == NULL)
4365 return;
4366
4367 for (i = 0; i < 20; i++)
4368 stl_sc26198getglobreg(portp, TSTR);
4369 }
4370
4371 /*****************************************************************************/
4372
4373 /*
4374 * If we are TX flow controlled and in IXANY mode then we may
4375 * need to unflow control here. We gotta do this because of the
4376 * automatic flow control modes of the sc26198.
4377 */
4378
4379 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4380 {
4381 unsigned char mr0;
4382
4383 mr0 = stl_sc26198getreg(portp, MR0);
4384 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4385 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4386 stl_sc26198wait(portp);
4387 stl_sc26198setreg(portp, MR0, mr0);
4388 clear_bit(ASYI_TXFLOWED, &portp->istate);
4389 }
4390
4391 /*****************************************************************************/
4392
4393 /*
4394 * Interrupt service routine for sc26198 panels.
4395 */
4396
4397 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4398 {
4399 struct stlport *portp;
4400 unsigned int iack;
4401
4402 spin_lock(&brd_lock);
4403
4404 /*
4405 * Work around bug in sc26198 chip... Cannot have A6 address
4406 * line of UART high, else iack will be returned as 0.
4407 */
4408 outb(0, (iobase + 1));
4409
4410 iack = inb(iobase + XP_IACK);
4411 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4412
4413 if (iack & IVR_RXDATA)
4414 stl_sc26198rxisr(portp, iack);
4415 else if (iack & IVR_TXDATA)
4416 stl_sc26198txisr(portp);
4417 else
4418 stl_sc26198otherisr(portp, iack);
4419
4420 spin_unlock(&brd_lock);
4421 }
4422
4423 /*****************************************************************************/
4424
4425 /*
4426 * Transmit interrupt handler. This has gotta be fast! Handling TX
4427 * chars is pretty simple, stuff as many as possible from the TX buffer
4428 * into the sc26198 FIFO.
4429 * In practice it is possible that interrupts are enabled but that the
4430 * port has been hung up. Need to handle not having any TX buffer here,
4431 * this is done by using the side effect that head and tail will also
4432 * be NULL if the buffer has been freed.
4433 */
4434
4435 static void stl_sc26198txisr(struct stlport *portp)
4436 {
4437 unsigned int ioaddr;
4438 unsigned char mr0;
4439 int len, stlen;
4440 char *head, *tail;
4441
4442 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4443
4444 ioaddr = portp->ioaddr;
4445 head = portp->tx.head;
4446 tail = portp->tx.tail;
4447 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4448 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4449 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4450 set_bit(ASYI_TXLOW, &portp->istate);
4451 schedule_work(&portp->tqueue);
4452 }
4453
4454 if (len == 0) {
4455 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4456 mr0 = inb(ioaddr + XP_DATA);
4457 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4458 portp->imr &= ~IR_TXRDY;
4459 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4460 outb(portp->imr, (ioaddr + XP_DATA));
4461 clear_bit(ASYI_TXBUSY, &portp->istate);
4462 } else {
4463 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4464 outb(mr0, (ioaddr + XP_DATA));
4465 }
4466 } else {
4467 len = min(len, SC26198_TXFIFOSIZE);
4468 portp->stats.txtotal += len;
4469 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4470 outb(GTXFIFO, (ioaddr + XP_ADDR));
4471 outsb((ioaddr + XP_DATA), tail, stlen);
4472 len -= stlen;
4473 tail += stlen;
4474 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4475 tail = portp->tx.buf;
4476 if (len > 0) {
4477 outsb((ioaddr + XP_DATA), tail, len);
4478 tail += len;
4479 }
4480 portp->tx.tail = tail;
4481 }
4482 }
4483
4484 /*****************************************************************************/
4485
4486 /*
4487 * Receive character interrupt handler. Determine if we have good chars
4488 * or bad chars and then process appropriately. Good chars are easy
4489 * just shove the lot into the RX buffer and set all status byte to 0.
4490 * If a bad RX char then process as required. This routine needs to be
4491 * fast! In practice it is possible that we get an interrupt on a port
4492 * that is closed. This can happen on hangups - since they completely
4493 * shutdown a port not in user context. Need to handle this case.
4494 */
4495
4496 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4497 {
4498 struct tty_struct *tty;
4499 unsigned int len, buflen, ioaddr;
4500
4501 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4502
4503 tty = portp->tty;
4504 ioaddr = portp->ioaddr;
4505 outb(GIBCR, (ioaddr + XP_ADDR));
4506 len = inb(ioaddr + XP_DATA) + 1;
4507
4508 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4509 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4510 len = min(len, sizeof(stl_unwanted));
4511 outb(GRXFIFO, (ioaddr + XP_ADDR));
4512 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4513 portp->stats.rxlost += len;
4514 portp->stats.rxtotal += len;
4515 } else {
4516 len = min(len, buflen);
4517 if (len > 0) {
4518 unsigned char *ptr;
4519 outb(GRXFIFO, (ioaddr + XP_ADDR));
4520 tty_prepare_flip_string(tty, &ptr, len);
4521 insb((ioaddr + XP_DATA), ptr, len);
4522 tty_schedule_flip(tty);
4523 portp->stats.rxtotal += len;
4524 }
4525 }
4526 } else {
4527 stl_sc26198rxbadchars(portp);
4528 }
4529
4530 /*
4531 * If we are TX flow controlled and in IXANY mode then we may need
4532 * to unflow control here. We gotta do this because of the automatic
4533 * flow control modes of the sc26198.
4534 */
4535 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4536 if ((tty != NULL) &&
4537 (tty->termios != NULL) &&
4538 (tty->termios->c_iflag & IXANY)) {
4539 stl_sc26198txunflow(portp, tty);
4540 }
4541 }
4542 }
4543
4544 /*****************************************************************************/
4545
4546 /*
4547 * Process an RX bad character.
4548 */
4549
4550 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4551 {
4552 struct tty_struct *tty;
4553 unsigned int ioaddr;
4554
4555 tty = portp->tty;
4556 ioaddr = portp->ioaddr;
4557
4558 if (status & SR_RXPARITY)
4559 portp->stats.rxparity++;
4560 if (status & SR_RXFRAMING)
4561 portp->stats.rxframing++;
4562 if (status & SR_RXOVERRUN)
4563 portp->stats.rxoverrun++;
4564 if (status & SR_RXBREAK)
4565 portp->stats.rxbreaks++;
4566
4567 if ((tty != NULL) &&
4568 ((portp->rxignoremsk & status) == 0)) {
4569 if (portp->rxmarkmsk & status) {
4570 if (status & SR_RXBREAK) {
4571 status = TTY_BREAK;
4572 if (portp->flags & ASYNC_SAK) {
4573 do_SAK(tty);
4574 BRDENABLE(portp->brdnr, portp->pagenr);
4575 }
4576 } else if (status & SR_RXPARITY)
4577 status = TTY_PARITY;
4578 else if (status & SR_RXFRAMING)
4579 status = TTY_FRAME;
4580 else if(status & SR_RXOVERRUN)
4581 status = TTY_OVERRUN;
4582 else
4583 status = 0;
4584 } else
4585 status = 0;
4586
4587 tty_insert_flip_char(tty, ch, status);
4588 tty_schedule_flip(tty);
4589
4590 if (status == 0)
4591 portp->stats.rxtotal++;
4592 }
4593 }
4594
4595 /*****************************************************************************/
4596
4597 /*
4598 * Process all characters in the RX FIFO of the UART. Check all char
4599 * status bytes as well, and process as required. We need to check
4600 * all bytes in the FIFO, in case some more enter the FIFO while we
4601 * are here. To get the exact character error type we need to switch
4602 * into CHAR error mode (that is why we need to make sure we empty
4603 * the FIFO).
4604 */
4605
4606 static void stl_sc26198rxbadchars(struct stlport *portp)
4607 {
4608 unsigned char status, mr1;
4609 char ch;
4610
4611 /*
4612 * To get the precise error type for each character we must switch
4613 * back into CHAR error mode.
4614 */
4615 mr1 = stl_sc26198getreg(portp, MR1);
4616 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4617
4618 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4619 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4620 ch = stl_sc26198getreg(portp, RXFIFO);
4621 stl_sc26198rxbadch(portp, status, ch);
4622 }
4623
4624 /*
4625 * To get correct interrupt class we must switch back into BLOCK
4626 * error mode.
4627 */
4628 stl_sc26198setreg(portp, MR1, mr1);
4629 }
4630
4631 /*****************************************************************************/
4632
4633 /*
4634 * Other interrupt handler. This includes modem signals, flow
4635 * control actions, etc. Most stuff is left to off-level interrupt
4636 * processing time.
4637 */
4638
4639 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4640 {
4641 unsigned char cir, ipr, xisr;
4642
4643 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4644
4645 cir = stl_sc26198getglobreg(portp, CIR);
4646
4647 switch (cir & CIR_SUBTYPEMASK) {
4648 case CIR_SUBCOS:
4649 ipr = stl_sc26198getreg(portp, IPR);
4650 if (ipr & IPR_DCDCHANGE) {
4651 set_bit(ASYI_DCDCHANGE, &portp->istate);
4652 schedule_work(&portp->tqueue);
4653 portp->stats.modem++;
4654 }
4655 break;
4656 case CIR_SUBXONXOFF:
4657 xisr = stl_sc26198getreg(portp, XISR);
4658 if (xisr & XISR_RXXONGOT) {
4659 set_bit(ASYI_TXFLOWED, &portp->istate);
4660 portp->stats.txxoff++;
4661 }
4662 if (xisr & XISR_RXXOFFGOT) {
4663 clear_bit(ASYI_TXFLOWED, &portp->istate);
4664 portp->stats.txxon++;
4665 }
4666 break;
4667 case CIR_SUBBREAK:
4668 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4669 stl_sc26198rxbadchars(portp);
4670 break;
4671 default:
4672 break;
4673 }
4674 }
4675
4676 static void stl_free_isabrds(void)
4677 {
4678 struct stlbrd *brdp;
4679 unsigned int i;
4680
4681 for (i = 0; i < stl_nrbrds; i++) {
4682 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4683 continue;
4684
4685 free_irq(brdp->irq, brdp);
4686
4687 stl_cleanup_panels(brdp);
4688
4689 release_region(brdp->ioaddr1, brdp->iosize1);
4690 if (brdp->iosize2 > 0)
4691 release_region(brdp->ioaddr2, brdp->iosize2);
4692
4693 kfree(brdp);
4694 stl_brds[i] = NULL;
4695 }
4696 }
4697
4698 /*
4699 * Loadable module initialization stuff.
4700 */
4701 static int __init stallion_module_init(void)
4702 {
4703 struct stlbrd *brdp;
4704 struct stlconf conf;
4705 unsigned int i, j;
4706 int retval;
4707
4708 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4709
4710 spin_lock_init(&stallion_lock);
4711 spin_lock_init(&brd_lock);
4712
4713 /*
4714 * Find any dynamically supported boards. That is via module load
4715 * line options.
4716 */
4717 for (i = stl_nrbrds; i < stl_nargs; i++) {
4718 memset(&conf, 0, sizeof(conf));
4719 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4720 continue;
4721 if ((brdp = stl_allocbrd()) == NULL)
4722 continue;
4723 brdp->brdnr = i;
4724 brdp->brdtype = conf.brdtype;
4725 brdp->ioaddr1 = conf.ioaddr1;
4726 brdp->ioaddr2 = conf.ioaddr2;
4727 brdp->irq = conf.irq;
4728 brdp->irqtype = conf.irqtype;
4729 if (stl_brdinit(brdp))
4730 kfree(brdp);
4731 else {
4732 for (j = 0; j < brdp->nrports; j++)
4733 tty_register_device(stl_serial,
4734 brdp->brdnr * STL_MAXPORTS + j, NULL);
4735 stl_brds[brdp->brdnr] = brdp;
4736 stl_nrbrds = i + 1;
4737 }
4738 }
4739
4740 /* this has to be _after_ isa finding because of locking */
4741 retval = pci_register_driver(&stl_pcidriver);
4742 if (retval && stl_nrbrds == 0)
4743 goto err;
4744
4745 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4746 if (!stl_serial) {
4747 retval = -ENOMEM;
4748 goto err_pcidr;
4749 }
4750
4751 /*
4752 * Set up a character driver for per board stuff. This is mainly used
4753 * to do stats ioctls on the ports.
4754 */
4755 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4756 printk("STALLION: failed to register serial board device\n");
4757
4758 stallion_class = class_create(THIS_MODULE, "staliomem");
4759 if (IS_ERR(stallion_class)) {
4760 retval = PTR_ERR(stallion_class);
4761 goto err_reg;
4762 }
4763 for (i = 0; i < 4; i++)
4764 class_device_create(stallion_class, NULL,
4765 MKDEV(STL_SIOMEMMAJOR, i), NULL,
4766 "staliomem%d", i);
4767
4768 stl_serial->owner = THIS_MODULE;
4769 stl_serial->driver_name = stl_drvname;
4770 stl_serial->name = "ttyE";
4771 stl_serial->major = STL_SERIALMAJOR;
4772 stl_serial->minor_start = 0;
4773 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4774 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4775 stl_serial->init_termios = stl_deftermios;
4776 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4777 tty_set_operations(stl_serial, &stl_ops);
4778
4779 retval = tty_register_driver(stl_serial);
4780 if (retval) {
4781 printk("STALLION: failed to register serial driver\n");
4782 goto err_clsdev;
4783 }
4784
4785 return 0;
4786 err_clsdev:
4787 for (i = 0; i < 4; i++)
4788 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4789 class_destroy(stallion_class);
4790 err_reg:
4791 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4792 put_tty_driver(stl_serial);
4793 err_pcidr:
4794 pci_unregister_driver(&stl_pcidriver);
4795 stl_free_isabrds();
4796 err:
4797 return retval;
4798 }
4799
4800 static void __exit stallion_module_exit(void)
4801 {
4802 struct stlbrd *brdp;
4803 unsigned int i, j;
4804 int retval;
4805
4806 pr_debug("cleanup_module()\n");
4807
4808 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4809 stl_drvversion);
4810
4811 /*
4812 * Free up all allocated resources used by the ports. This includes
4813 * memory and interrupts. As part of this process we will also do
4814 * a hangup on every open port - to try to flush out any processes
4815 * hanging onto ports.
4816 */
4817 for (i = 0; i < stl_nrbrds; i++) {
4818 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4819 continue;
4820 for (j = 0; j < brdp->nrports; j++)
4821 tty_unregister_device(stl_serial,
4822 brdp->brdnr * STL_MAXPORTS + j);
4823 }
4824 tty_unregister_driver(stl_serial);
4825 put_tty_driver(stl_serial);
4826
4827 for (i = 0; i < 4; i++)
4828 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4829 if ((retval = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
4830 printk("STALLION: failed to un-register serial memory device, "
4831 "errno=%d\n", -retval);
4832 class_destroy(stallion_class);
4833
4834 pci_unregister_driver(&stl_pcidriver);
4835
4836 stl_free_isabrds();
4837 }
4838
4839 module_init(stallion_module_init);
4840 module_exit(stallion_module_exit);
4841
4842 MODULE_AUTHOR("Greg Ungerer");
4843 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4844 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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