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semaphore: __down_common: use signal_pending_state()
[linux-2.6/mini2440.git] / drivers / char / stallion.c
blob19db1eb87c26fa22eb9e4f17d8b6ec384e6c021b
1 /*****************************************************************************/
2
3 /*
4 * stallion.c -- stallion multiport serial driver.
5 *
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
8 *
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 /*****************************************************************************/
28
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
44 #include <linux/ctype.h>
45
46 #include <asm/io.h>
47 #include <asm/uaccess.h>
48
49 #include <linux/pci.h>
50
51 /*****************************************************************************/
52
53 /*
54 * Define different board types. Use the standard Stallion "assigned"
55 * board numbers. Boards supported in this driver are abbreviated as
56 * EIO = EasyIO and ECH = EasyConnection 8/32.
57 */
58 #define BRD_EASYIO 20
59 #define BRD_ECH 21
60 #define BRD_ECHMC 22
61 #define BRD_ECHPCI 26
62 #define BRD_ECH64PCI 27
63 #define BRD_EASYIOPCI 28
64
65 struct stlconf {
66 unsigned int brdtype;
67 int ioaddr1;
68 int ioaddr2;
69 unsigned long memaddr;
70 int irq;
71 int irqtype;
72 };
73
74 static unsigned int stl_nrbrds;
75
76 /*****************************************************************************/
77
78 /*
79 * Define some important driver characteristics. Device major numbers
80 * allocated as per Linux Device Registry.
81 */
82 #ifndef STL_SIOMEMMAJOR
83 #define STL_SIOMEMMAJOR 28
84 #endif
85 #ifndef STL_SERIALMAJOR
86 #define STL_SERIALMAJOR 24
87 #endif
88 #ifndef STL_CALLOUTMAJOR
89 #define STL_CALLOUTMAJOR 25
90 #endif
91
92 /*
93 * Set the TX buffer size. Bigger is better, but we don't want
94 * to chew too much memory with buffers!
95 */
96 #define STL_TXBUFLOW 512
97 #define STL_TXBUFSIZE 4096
98
99 /*****************************************************************************/
100
101 /*
102 * Define our local driver identity first. Set up stuff to deal with
103 * all the local structures required by a serial tty driver.
104 */
105 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
106 static char *stl_drvname = "stallion";
107 static char *stl_drvversion = "5.6.0";
108
109 static struct tty_driver *stl_serial;
110
111 /*
112 * Define a local default termios struct. All ports will be created
113 * with this termios initially. Basically all it defines is a raw port
114 * at 9600, 8 data bits, 1 stop bit.
115 */
116 static struct ktermios stl_deftermios = {
117 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
118 .c_cc = INIT_C_CC,
119 .c_ispeed = 9600,
120 .c_ospeed = 9600,
121 };
122
123 /*
124 * Define global place to put buffer overflow characters.
125 */
126 static char stl_unwanted[SC26198_RXFIFOSIZE];
127
128 /*****************************************************************************/
129
130 static DEFINE_MUTEX(stl_brdslock);
131 static struct stlbrd *stl_brds[STL_MAXBRDS];
132
133 /*
134 * Per board state flags. Used with the state field of the board struct.
135 * Not really much here!
136 */
137 #define BRD_FOUND 0x1
138 #define STL_PROBED 0x2
139
140
141 /*
142 * Define the port structure istate flags. These set of flags are
143 * modified at interrupt time - so setting and reseting them needs
144 * to be atomic. Use the bit clear/setting routines for this.
145 */
146 #define ASYI_TXBUSY 1
147 #define ASYI_TXLOW 2
148 #define ASYI_TXFLOWED 3
149
150 /*
151 * Define an array of board names as printable strings. Handy for
152 * referencing boards when printing trace and stuff.
153 */
154 static char *stl_brdnames[] = {
155 NULL,
156 NULL,
157 NULL,
158 NULL,
159 NULL,
160 NULL,
161 NULL,
162 NULL,
163 NULL,
164 NULL,
165 NULL,
166 NULL,
167 NULL,
168 NULL,
169 NULL,
170 NULL,
171 NULL,
172 NULL,
173 NULL,
174 NULL,
175 "EasyIO",
176 "EC8/32-AT",
177 "EC8/32-MC",
178 NULL,
179 NULL,
180 NULL,
181 "EC8/32-PCI",
182 "EC8/64-PCI",
183 "EasyIO-PCI",
184 };
185
186 /*****************************************************************************/
187
188 /*
189 * Define some string labels for arguments passed from the module
190 * load line. These allow for easy board definitions, and easy
191 * modification of the io, memory and irq resoucres.
192 */
193 static unsigned int stl_nargs;
194 static char *board0[4];
195 static char *board1[4];
196 static char *board2[4];
197 static char *board3[4];
198
199 static char **stl_brdsp[] = {
200 (char **) &board0,
201 (char **) &board1,
202 (char **) &board2,
203 (char **) &board3
204 };
205
206 /*
207 * Define a set of common board names, and types. This is used to
208 * parse any module arguments.
209 */
210
211 static struct {
212 char *name;
213 int type;
214 } stl_brdstr[] = {
215 { "easyio", BRD_EASYIO },
216 { "eio", BRD_EASYIO },
217 { "20", BRD_EASYIO },
218 { "ec8/32", BRD_ECH },
219 { "ec8/32-at", BRD_ECH },
220 { "ec8/32-isa", BRD_ECH },
221 { "ech", BRD_ECH },
222 { "echat", BRD_ECH },
223 { "21", BRD_ECH },
224 { "ec8/32-mc", BRD_ECHMC },
225 { "ec8/32-mca", BRD_ECHMC },
226 { "echmc", BRD_ECHMC },
227 { "echmca", BRD_ECHMC },
228 { "22", BRD_ECHMC },
229 { "ec8/32-pc", BRD_ECHPCI },
230 { "ec8/32-pci", BRD_ECHPCI },
231 { "26", BRD_ECHPCI },
232 { "ec8/64-pc", BRD_ECH64PCI },
233 { "ec8/64-pci", BRD_ECH64PCI },
234 { "ech-pci", BRD_ECH64PCI },
235 { "echpci", BRD_ECH64PCI },
236 { "echpc", BRD_ECH64PCI },
237 { "27", BRD_ECH64PCI },
238 { "easyio-pc", BRD_EASYIOPCI },
239 { "easyio-pci", BRD_EASYIOPCI },
240 { "eio-pci", BRD_EASYIOPCI },
241 { "eiopci", BRD_EASYIOPCI },
242 { "28", BRD_EASYIOPCI },
243 };
244
245 /*
246 * Define the module agruments.
247 */
248
249 module_param_array(board0, charp, &stl_nargs, 0);
250 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
251 module_param_array(board1, charp, &stl_nargs, 0);
252 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
253 module_param_array(board2, charp, &stl_nargs, 0);
254 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
255 module_param_array(board3, charp, &stl_nargs, 0);
256 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
257
258 /*****************************************************************************/
259
260 /*
261 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
262 * to the directly accessible io ports of these boards (not the uarts -
263 * they are in cd1400.h and sc26198.h).
264 */
265 #define EIO_8PORTRS 0x04
266 #define EIO_4PORTRS 0x05
267 #define EIO_8PORTDI 0x00
268 #define EIO_8PORTM 0x06
269 #define EIO_MK3 0x03
270 #define EIO_IDBITMASK 0x07
271
272 #define EIO_BRDMASK 0xf0
273 #define ID_BRD4 0x10
274 #define ID_BRD8 0x20
275 #define ID_BRD16 0x30
276
277 #define EIO_INTRPEND 0x08
278 #define EIO_INTEDGE 0x00
279 #define EIO_INTLEVEL 0x08
280 #define EIO_0WS 0x10
281
282 #define ECH_ID 0xa0
283 #define ECH_IDBITMASK 0xe0
284 #define ECH_BRDENABLE 0x08
285 #define ECH_BRDDISABLE 0x00
286 #define ECH_INTENABLE 0x01
287 #define ECH_INTDISABLE 0x00
288 #define ECH_INTLEVEL 0x02
289 #define ECH_INTEDGE 0x00
290 #define ECH_INTRPEND 0x01
291 #define ECH_BRDRESET 0x01
292
293 #define ECHMC_INTENABLE 0x01
294 #define ECHMC_BRDRESET 0x02
295
296 #define ECH_PNLSTATUS 2
297 #define ECH_PNL16PORT 0x20
298 #define ECH_PNLIDMASK 0x07
299 #define ECH_PNLXPID 0x40
300 #define ECH_PNLINTRPEND 0x80
301
302 #define ECH_ADDR2MASK 0x1e0
303
304 /*
305 * Define the vector mapping bits for the programmable interrupt board
306 * hardware. These bits encode the interrupt for the board to use - it
307 * is software selectable (except the EIO-8M).
308 */
309 static unsigned char stl_vecmap[] = {
310 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
311 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
312 };
313
314 /*
315 * Lock ordering is that you may not take stallion_lock holding
316 * brd_lock.
317 */
318
319 static spinlock_t brd_lock; /* Guard the board mapping */
320 static spinlock_t stallion_lock; /* Guard the tty driver */
321
322 /*
323 * Set up enable and disable macros for the ECH boards. They require
324 * the secondary io address space to be activated and deactivated.
325 * This way all ECH boards can share their secondary io region.
326 * If this is an ECH-PCI board then also need to set the page pointer
327 * to point to the correct page.
328 */
329 #define BRDENABLE(brdnr,pagenr) \
330 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
331 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
332 stl_brds[(brdnr)]->ioctrl); \
333 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
334 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
335
336 #define BRDDISABLE(brdnr) \
337 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
338 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
339 stl_brds[(brdnr)]->ioctrl);
340
341 #define STL_CD1400MAXBAUD 230400
342 #define STL_SC26198MAXBAUD 460800
343
344 #define STL_BAUDBASE 115200
345 #define STL_CLOSEDELAY (5 * HZ / 10)
346
347 /*****************************************************************************/
348
349 /*
350 * Define the Stallion PCI vendor and device IDs.
351 */
352 #ifndef PCI_VENDOR_ID_STALLION
353 #define PCI_VENDOR_ID_STALLION 0x124d
354 #endif
355 #ifndef PCI_DEVICE_ID_ECHPCI832
356 #define PCI_DEVICE_ID_ECHPCI832 0x0000
357 #endif
358 #ifndef PCI_DEVICE_ID_ECHPCI864
359 #define PCI_DEVICE_ID_ECHPCI864 0x0002
360 #endif
361 #ifndef PCI_DEVICE_ID_EIOPCI
362 #define PCI_DEVICE_ID_EIOPCI 0x0003
363 #endif
364
365 /*
366 * Define structure to hold all Stallion PCI boards.
367 */
368
369 static struct pci_device_id stl_pcibrds[] = {
370 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
371 .driver_data = BRD_ECH64PCI },
372 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
373 .driver_data = BRD_EASYIOPCI },
374 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
375 .driver_data = BRD_ECHPCI },
376 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
377 .driver_data = BRD_ECHPCI },
378 { }
379 };
380 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
381
382 /*****************************************************************************/
383
384 /*
385 * Define macros to extract a brd/port number from a minor number.
386 */
387 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
388 #define MINOR2PORT(min) ((min) & 0x3f)
389
390 /*
391 * Define a baud rate table that converts termios baud rate selector
392 * into the actual baud rate value. All baud rate calculations are
393 * based on the actual baud rate required.
394 */
395 static unsigned int stl_baudrates[] = {
396 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
397 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
398 };
399
400 /*****************************************************************************/
401
402 /*
403 * Declare all those functions in this driver!
404 */
405
406 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
407 static int stl_brdinit(struct stlbrd *brdp);
408 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
409 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
410 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
411
412 /*
413 * CD1400 uart specific handling functions.
414 */
415 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
416 static int stl_cd1400getreg(struct stlport *portp, int regnr);
417 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
418 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
419 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
420 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
421 static int stl_cd1400getsignals(struct stlport *portp);
422 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
423 static void stl_cd1400ccrwait(struct stlport *portp);
424 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
425 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
426 static void stl_cd1400disableintrs(struct stlport *portp);
427 static void stl_cd1400sendbreak(struct stlport *portp, int len);
428 static void stl_cd1400flowctrl(struct stlport *portp, int state);
429 static void stl_cd1400sendflow(struct stlport *portp, int state);
430 static void stl_cd1400flush(struct stlport *portp);
431 static int stl_cd1400datastate(struct stlport *portp);
432 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
433 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
434 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
435 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
436 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
437
438 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
439
440 /*
441 * SC26198 uart specific handling functions.
442 */
443 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
444 static int stl_sc26198getreg(struct stlport *portp, int regnr);
445 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
446 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
447 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
448 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
449 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
450 static int stl_sc26198getsignals(struct stlport *portp);
451 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
452 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
453 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
454 static void stl_sc26198disableintrs(struct stlport *portp);
455 static void stl_sc26198sendbreak(struct stlport *portp, int len);
456 static void stl_sc26198flowctrl(struct stlport *portp, int state);
457 static void stl_sc26198sendflow(struct stlport *portp, int state);
458 static void stl_sc26198flush(struct stlport *portp);
459 static int stl_sc26198datastate(struct stlport *portp);
460 static void stl_sc26198wait(struct stlport *portp);
461 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
462 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
463 static void stl_sc26198txisr(struct stlport *port);
464 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
465 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
466 static void stl_sc26198rxbadchars(struct stlport *portp);
467 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
468
469 /*****************************************************************************/
470
471 /*
472 * Generic UART support structure.
473 */
474 typedef struct uart {
475 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
476 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
477 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
478 int (*getsignals)(struct stlport *portp);
479 void (*setsignals)(struct stlport *portp, int dtr, int rts);
480 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
481 void (*startrxtx)(struct stlport *portp, int rx, int tx);
482 void (*disableintrs)(struct stlport *portp);
483 void (*sendbreak)(struct stlport *portp, int len);
484 void (*flowctrl)(struct stlport *portp, int state);
485 void (*sendflow)(struct stlport *portp, int state);
486 void (*flush)(struct stlport *portp);
487 int (*datastate)(struct stlport *portp);
488 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
489 } uart_t;
490
491 /*
492 * Define some macros to make calling these functions nice and clean.
493 */
494 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
495 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
496 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
497 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
498 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
499 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
500 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
501 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
502 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
503 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
504 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
505 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
506 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
507
508 /*****************************************************************************/
509
510 /*
511 * CD1400 UART specific data initialization.
512 */
513 static uart_t stl_cd1400uart = {
514 stl_cd1400panelinit,
515 stl_cd1400portinit,
516 stl_cd1400setport,
517 stl_cd1400getsignals,
518 stl_cd1400setsignals,
519 stl_cd1400enablerxtx,
520 stl_cd1400startrxtx,
521 stl_cd1400disableintrs,
522 stl_cd1400sendbreak,
523 stl_cd1400flowctrl,
524 stl_cd1400sendflow,
525 stl_cd1400flush,
526 stl_cd1400datastate,
527 stl_cd1400eiointr
528 };
529
530 /*
531 * Define the offsets within the register bank of a cd1400 based panel.
532 * These io address offsets are common to the EasyIO board as well.
533 */
534 #define EREG_ADDR 0
535 #define EREG_DATA 4
536 #define EREG_RXACK 5
537 #define EREG_TXACK 6
538 #define EREG_MDACK 7
539
540 #define EREG_BANKSIZE 8
541
542 #define CD1400_CLK 25000000
543 #define CD1400_CLK8M 20000000
544
545 /*
546 * Define the cd1400 baud rate clocks. These are used when calculating
547 * what clock and divisor to use for the required baud rate. Also
548 * define the maximum baud rate allowed, and the default base baud.
549 */
550 static int stl_cd1400clkdivs[] = {
551 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
552 };
553
554 /*****************************************************************************/
555
556 /*
557 * SC26198 UART specific data initization.
558 */
559 static uart_t stl_sc26198uart = {
560 stl_sc26198panelinit,
561 stl_sc26198portinit,
562 stl_sc26198setport,
563 stl_sc26198getsignals,
564 stl_sc26198setsignals,
565 stl_sc26198enablerxtx,
566 stl_sc26198startrxtx,
567 stl_sc26198disableintrs,
568 stl_sc26198sendbreak,
569 stl_sc26198flowctrl,
570 stl_sc26198sendflow,
571 stl_sc26198flush,
572 stl_sc26198datastate,
573 stl_sc26198intr
574 };
575
576 /*
577 * Define the offsets within the register bank of a sc26198 based panel.
578 */
579 #define XP_DATA 0
580 #define XP_ADDR 1
581 #define XP_MODID 2
582 #define XP_STATUS 2
583 #define XP_IACK 3
584
585 #define XP_BANKSIZE 4
586
587 /*
588 * Define the sc26198 baud rate table. Offsets within the table
589 * represent the actual baud rate selector of sc26198 registers.
590 */
591 static unsigned int sc26198_baudtable[] = {
592 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
593 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
594 230400, 460800, 921600
595 };
596
597 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
598
599 /*****************************************************************************/
600
601 /*
602 * Define the driver info for a user level control device. Used mainly
603 * to get at port stats - only not using the port device itself.
604 */
605 static const struct file_operations stl_fsiomem = {
606 .owner = THIS_MODULE,
607 .ioctl = stl_memioctl,
608 };
609
610 static struct class *stallion_class;
611
612 static void stl_cd_change(struct stlport *portp)
613 {
614 unsigned int oldsigs = portp->sigs;
615
616 if (!portp->port.tty)
617 return;
618
619 portp->sigs = stl_getsignals(portp);
620
621 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
622 wake_up_interruptible(&portp->port.open_wait);
623
624 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
625 if (portp->port.flags & ASYNC_CHECK_CD)
626 tty_hangup(portp->port.tty);
627 }
628
629 /*
630 * Check for any arguments passed in on the module load command line.
631 */
632
633 /*****************************************************************************/
634
635 /*
636 * Parse the supplied argument string, into the board conf struct.
637 */
638
639 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
640 {
641 char *sp;
642 unsigned int i;
643
644 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
645
646 if ((argp[0] == NULL) || (*argp[0] == 0))
647 return 0;
648
649 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
650 *sp = tolower(*sp);
651
652 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
653 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
654 break;
655
656 if (i == ARRAY_SIZE(stl_brdstr)) {
657 printk("STALLION: unknown board name, %s?\n", argp[0]);
658 return 0;
659 }
660
661 confp->brdtype = stl_brdstr[i].type;
662
663 i = 1;
664 if ((argp[i] != NULL) && (*argp[i] != 0))
665 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
666 i++;
667 if (confp->brdtype == BRD_ECH) {
668 if ((argp[i] != NULL) && (*argp[i] != 0))
669 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
670 i++;
671 }
672 if ((argp[i] != NULL) && (*argp[i] != 0))
673 confp->irq = simple_strtoul(argp[i], NULL, 0);
674 return 1;
675 }
676
677 /*****************************************************************************/
678
679 /*
680 * Allocate a new board structure. Fill out the basic info in it.
681 */
682
683 static struct stlbrd *stl_allocbrd(void)
684 {
685 struct stlbrd *brdp;
686
687 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
688 if (!brdp) {
689 printk("STALLION: failed to allocate memory (size=%Zd)\n",
690 sizeof(struct stlbrd));
691 return NULL;
692 }
693
694 brdp->magic = STL_BOARDMAGIC;
695 return brdp;
696 }
697
698 /*****************************************************************************/
699
700 static int stl_open(struct tty_struct *tty, struct file *filp)
701 {
702 struct stlport *portp;
703 struct stlbrd *brdp;
704 unsigned int minordev, brdnr, panelnr;
705 int portnr, rc;
706
707 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
708
709 minordev = tty->index;
710 brdnr = MINOR2BRD(minordev);
711 if (brdnr >= stl_nrbrds)
712 return -ENODEV;
713 brdp = stl_brds[brdnr];
714 if (brdp == NULL)
715 return -ENODEV;
716 minordev = MINOR2PORT(minordev);
717 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
718 if (brdp->panels[panelnr] == NULL)
719 break;
720 if (minordev < brdp->panels[panelnr]->nrports) {
721 portnr = minordev;
722 break;
723 }
724 minordev -= brdp->panels[panelnr]->nrports;
725 }
726 if (portnr < 0)
727 return -ENODEV;
728
729 portp = brdp->panels[panelnr]->ports[portnr];
730 if (portp == NULL)
731 return -ENODEV;
732
733 /*
734 * On the first open of the device setup the port hardware, and
735 * initialize the per port data structure.
736 */
737 portp->port.tty = tty;
738 tty->driver_data = portp;
739 portp->port.count++;
740
741 if ((portp->port.flags & ASYNC_INITIALIZED) == 0) {
742 if (!portp->tx.buf) {
743 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
744 if (!portp->tx.buf)
745 return -ENOMEM;
746 portp->tx.head = portp->tx.buf;
747 portp->tx.tail = portp->tx.buf;
748 }
749 stl_setport(portp, tty->termios);
750 portp->sigs = stl_getsignals(portp);
751 stl_setsignals(portp, 1, 1);
752 stl_enablerxtx(portp, 1, 1);
753 stl_startrxtx(portp, 1, 0);
754 clear_bit(TTY_IO_ERROR, &tty->flags);
755 portp->port.flags |= ASYNC_INITIALIZED;
756 }
757
758 /*
759 * Check if this port is in the middle of closing. If so then wait
760 * until it is closed then return error status, based on flag settings.
761 * The sleep here does not need interrupt protection since the wakeup
762 * for it is done with the same context.
763 */
764 if (portp->port.flags & ASYNC_CLOSING) {
765 interruptible_sleep_on(&portp->port.close_wait);
766 if (portp->port.flags & ASYNC_HUP_NOTIFY)
767 return -EAGAIN;
768 return -ERESTARTSYS;
769 }
770
771 /*
772 * Based on type of open being done check if it can overlap with any
773 * previous opens still in effect. If we are a normal serial device
774 * then also we might have to wait for carrier.
775 */
776 if (!(filp->f_flags & O_NONBLOCK))
777 if ((rc = stl_waitcarrier(portp, filp)) != 0)
778 return rc;
779
780 portp->port.flags |= ASYNC_NORMAL_ACTIVE;
781
782 return 0;
783 }
784
785 /*****************************************************************************/
786
787 /*
788 * Possibly need to wait for carrier (DCD signal) to come high. Say
789 * maybe because if we are clocal then we don't need to wait...
790 */
791
792 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
793 {
794 unsigned long flags;
795 int rc, doclocal;
796
797 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
798
799 rc = 0;
800 doclocal = 0;
801
802 spin_lock_irqsave(&stallion_lock, flags);
803
804 if (portp->port.tty->termios->c_cflag & CLOCAL)
805 doclocal++;
806
807 portp->openwaitcnt++;
808 if (! tty_hung_up_p(filp))
809 portp->port.count--;
810
811 for (;;) {
812 /* Takes brd_lock internally */
813 stl_setsignals(portp, 1, 1);
814 if (tty_hung_up_p(filp) ||
815 ((portp->port.flags & ASYNC_INITIALIZED) == 0)) {
816 if (portp->port.flags & ASYNC_HUP_NOTIFY)
817 rc = -EBUSY;
818 else
819 rc = -ERESTARTSYS;
820 break;
821 }
822 if (((portp->port.flags & ASYNC_CLOSING) == 0) &&
823 (doclocal || (portp->sigs & TIOCM_CD)))
824 break;
825 if (signal_pending(current)) {
826 rc = -ERESTARTSYS;
827 break;
828 }
829 /* FIXME */
830 interruptible_sleep_on(&portp->port.open_wait);
831 }
832
833 if (! tty_hung_up_p(filp))
834 portp->port.count++;
835 portp->openwaitcnt--;
836 spin_unlock_irqrestore(&stallion_lock, flags);
837
838 return rc;
839 }
840
841 /*****************************************************************************/
842
843 static void stl_flushbuffer(struct tty_struct *tty)
844 {
845 struct stlport *portp;
846
847 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
848
849 if (tty == NULL)
850 return;
851 portp = tty->driver_data;
852 if (portp == NULL)
853 return;
854
855 stl_flush(portp);
856 tty_wakeup(tty);
857 }
858
859 /*****************************************************************************/
860
861 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
862 {
863 struct stlport *portp;
864 unsigned long tend;
865
866 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
867
868 if (tty == NULL)
869 return;
870 portp = tty->driver_data;
871 if (portp == NULL)
872 return;
873
874 if (timeout == 0)
875 timeout = HZ;
876 tend = jiffies + timeout;
877
878 lock_kernel();
879 while (stl_datastate(portp)) {
880 if (signal_pending(current))
881 break;
882 msleep_interruptible(20);
883 if (time_after_eq(jiffies, tend))
884 break;
885 }
886 unlock_kernel();
887 }
888
889 /*****************************************************************************/
890
891 static void stl_close(struct tty_struct *tty, struct file *filp)
892 {
893 struct stlport *portp;
894 unsigned long flags;
895
896 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
897
898 portp = tty->driver_data;
899 if (portp == NULL)
900 return;
901
902 spin_lock_irqsave(&stallion_lock, flags);
903 if (tty_hung_up_p(filp)) {
904 spin_unlock_irqrestore(&stallion_lock, flags);
905 return;
906 }
907 if ((tty->count == 1) && (portp->port.count != 1))
908 portp->port.count = 1;
909 if (portp->port.count-- > 1) {
910 spin_unlock_irqrestore(&stallion_lock, flags);
911 return;
912 }
913
914 portp->port.count = 0;
915 portp->port.flags |= ASYNC_CLOSING;
916
917 /*
918 * May want to wait for any data to drain before closing. The BUSY
919 * flag keeps track of whether we are still sending or not - it is
920 * very accurate for the cd1400, not quite so for the sc26198.
921 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
922 */
923 tty->closing = 1;
924
925 spin_unlock_irqrestore(&stallion_lock, flags);
926
927 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
928 tty_wait_until_sent(tty, portp->closing_wait);
929 stl_waituntilsent(tty, (HZ / 2));
930
931
932 spin_lock_irqsave(&stallion_lock, flags);
933 portp->port.flags &= ~ASYNC_INITIALIZED;
934 spin_unlock_irqrestore(&stallion_lock, flags);
935
936 stl_disableintrs(portp);
937 if (tty->termios->c_cflag & HUPCL)
938 stl_setsignals(portp, 0, 0);
939 stl_enablerxtx(portp, 0, 0);
940 stl_flushbuffer(tty);
941 portp->istate = 0;
942 if (portp->tx.buf != NULL) {
943 kfree(portp->tx.buf);
944 portp->tx.buf = NULL;
945 portp->tx.head = NULL;
946 portp->tx.tail = NULL;
947 }
948 set_bit(TTY_IO_ERROR, &tty->flags);
949 tty_ldisc_flush(tty);
950
951 tty->closing = 0;
952 portp->port.tty = NULL;
953
954 if (portp->openwaitcnt) {
955 if (portp->close_delay)
956 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
957 wake_up_interruptible(&portp->port.open_wait);
958 }
959
960 portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
961 wake_up_interruptible(&portp->port.close_wait);
962 }
963
964 /*****************************************************************************/
965
966 /*
967 * Write routine. Take data and stuff it in to the TX ring queue.
968 * If transmit interrupts are not running then start them.
969 */
970
971 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
972 {
973 struct stlport *portp;
974 unsigned int len, stlen;
975 unsigned char *chbuf;
976 char *head, *tail;
977
978 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
979
980 portp = tty->driver_data;
981 if (portp == NULL)
982 return 0;
983 if (portp->tx.buf == NULL)
984 return 0;
985
986 /*
987 * If copying direct from user space we must cater for page faults,
988 * causing us to "sleep" here for a while. To handle this copy in all
989 * the data we need now, into a local buffer. Then when we got it all
990 * copy it into the TX buffer.
991 */
992 chbuf = (unsigned char *) buf;
993
994 head = portp->tx.head;
995 tail = portp->tx.tail;
996 if (head >= tail) {
997 len = STL_TXBUFSIZE - (head - tail) - 1;
998 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
999 } else {
1000 len = tail - head - 1;
1001 stlen = len;
1002 }
1003
1004 len = min(len, (unsigned int)count);
1005 count = 0;
1006 while (len > 0) {
1007 stlen = min(len, stlen);
1008 memcpy(head, chbuf, stlen);
1009 len -= stlen;
1010 chbuf += stlen;
1011 count += stlen;
1012 head += stlen;
1013 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1014 head = portp->tx.buf;
1015 stlen = tail - head;
1016 }
1017 }
1018 portp->tx.head = head;
1019
1020 clear_bit(ASYI_TXLOW, &portp->istate);
1021 stl_startrxtx(portp, -1, 1);
1022
1023 return count;
1024 }
1025
1026 /*****************************************************************************/
1027
1028 static int stl_putchar(struct tty_struct *tty, unsigned char ch)
1029 {
1030 struct stlport *portp;
1031 unsigned int len;
1032 char *head, *tail;
1033
1034 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1035
1036 if (tty == NULL)
1037 return -EINVAL;
1038 portp = tty->driver_data;
1039 if (portp == NULL)
1040 return -EINVAL;
1041 if (portp->tx.buf == NULL)
1042 return -EINVAL;
1043
1044 head = portp->tx.head;
1045 tail = portp->tx.tail;
1046
1047 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1048 len--;
1049
1050 if (len > 0) {
1051 *head++ = ch;
1052 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1053 head = portp->tx.buf;
1054 }
1055 portp->tx.head = head;
1056 return 0;
1057 }
1058
1059 /*****************************************************************************/
1060
1061 /*
1062 * If there are any characters in the buffer then make sure that TX
1063 * interrupts are on and get'em out. Normally used after the putchar
1064 * routine has been called.
1065 */
1066
1067 static void stl_flushchars(struct tty_struct *tty)
1068 {
1069 struct stlport *portp;
1070
1071 pr_debug("stl_flushchars(tty=%p)\n", tty);
1072
1073 if (tty == NULL)
1074 return;
1075 portp = tty->driver_data;
1076 if (portp == NULL)
1077 return;
1078 if (portp->tx.buf == NULL)
1079 return;
1080
1081 stl_startrxtx(portp, -1, 1);
1082 }
1083
1084 /*****************************************************************************/
1085
1086 static int stl_writeroom(struct tty_struct *tty)
1087 {
1088 struct stlport *portp;
1089 char *head, *tail;
1090
1091 pr_debug("stl_writeroom(tty=%p)\n", tty);
1092
1093 if (tty == NULL)
1094 return 0;
1095 portp = tty->driver_data;
1096 if (portp == NULL)
1097 return 0;
1098 if (portp->tx.buf == NULL)
1099 return 0;
1100
1101 head = portp->tx.head;
1102 tail = portp->tx.tail;
1103 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1104 }
1105
1106 /*****************************************************************************/
1107
1108 /*
1109 * Return number of chars in the TX buffer. Normally we would just
1110 * calculate the number of chars in the buffer and return that, but if
1111 * the buffer is empty and TX interrupts are still on then we return
1112 * that the buffer still has 1 char in it. This way whoever called us
1113 * will not think that ALL chars have drained - since the UART still
1114 * must have some chars in it (we are busy after all).
1115 */
1116
1117 static int stl_charsinbuffer(struct tty_struct *tty)
1118 {
1119 struct stlport *portp;
1120 unsigned int size;
1121 char *head, *tail;
1122
1123 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1124
1125 if (tty == NULL)
1126 return 0;
1127 portp = tty->driver_data;
1128 if (portp == NULL)
1129 return 0;
1130 if (portp->tx.buf == NULL)
1131 return 0;
1132
1133 head = portp->tx.head;
1134 tail = portp->tx.tail;
1135 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1136 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1137 size = 1;
1138 return size;
1139 }
1140
1141 /*****************************************************************************/
1142
1143 /*
1144 * Generate the serial struct info.
1145 */
1146
1147 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1148 {
1149 struct serial_struct sio;
1150 struct stlbrd *brdp;
1151
1152 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1153
1154 memset(&sio, 0, sizeof(struct serial_struct));
1155 sio.line = portp->portnr;
1156 sio.port = portp->ioaddr;
1157 sio.flags = portp->port.flags;
1158 sio.baud_base = portp->baud_base;
1159 sio.close_delay = portp->close_delay;
1160 sio.closing_wait = portp->closing_wait;
1161 sio.custom_divisor = portp->custom_divisor;
1162 sio.hub6 = 0;
1163 if (portp->uartp == &stl_cd1400uart) {
1164 sio.type = PORT_CIRRUS;
1165 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1166 } else {
1167 sio.type = PORT_UNKNOWN;
1168 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1169 }
1170
1171 brdp = stl_brds[portp->brdnr];
1172 if (brdp != NULL)
1173 sio.irq = brdp->irq;
1174
1175 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1176 }
1177
1178 /*****************************************************************************/
1179
1180 /*
1181 * Set port according to the serial struct info.
1182 * At this point we do not do any auto-configure stuff, so we will
1183 * just quietly ignore any requests to change irq, etc.
1184 */
1185
1186 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1187 {
1188 struct serial_struct sio;
1189
1190 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1191
1192 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1193 return -EFAULT;
1194 if (!capable(CAP_SYS_ADMIN)) {
1195 if ((sio.baud_base != portp->baud_base) ||
1196 (sio.close_delay != portp->close_delay) ||
1197 ((sio.flags & ~ASYNC_USR_MASK) !=
1198 (portp->port.flags & ~ASYNC_USR_MASK)))
1199 return -EPERM;
1200 }
1201
1202 portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
1203 (sio.flags & ASYNC_USR_MASK);
1204 portp->baud_base = sio.baud_base;
1205 portp->close_delay = sio.close_delay;
1206 portp->closing_wait = sio.closing_wait;
1207 portp->custom_divisor = sio.custom_divisor;
1208 stl_setport(portp, portp->port.tty->termios);
1209 return 0;
1210 }
1211
1212 /*****************************************************************************/
1213
1214 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1215 {
1216 struct stlport *portp;
1217
1218 if (tty == NULL)
1219 return -ENODEV;
1220 portp = tty->driver_data;
1221 if (portp == NULL)
1222 return -ENODEV;
1223 if (tty->flags & (1 << TTY_IO_ERROR))
1224 return -EIO;
1225
1226 return stl_getsignals(portp);
1227 }
1228
1229 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1230 unsigned int set, unsigned int clear)
1231 {
1232 struct stlport *portp;
1233 int rts = -1, dtr = -1;
1234
1235 if (tty == NULL)
1236 return -ENODEV;
1237 portp = tty->driver_data;
1238 if (portp == NULL)
1239 return -ENODEV;
1240 if (tty->flags & (1 << TTY_IO_ERROR))
1241 return -EIO;
1242
1243 if (set & TIOCM_RTS)
1244 rts = 1;
1245 if (set & TIOCM_DTR)
1246 dtr = 1;
1247 if (clear & TIOCM_RTS)
1248 rts = 0;
1249 if (clear & TIOCM_DTR)
1250 dtr = 0;
1251
1252 stl_setsignals(portp, dtr, rts);
1253 return 0;
1254 }
1255
1256 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1257 {
1258 struct stlport *portp;
1259 int rc;
1260 void __user *argp = (void __user *)arg;
1261
1262 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1263 arg);
1264
1265 if (tty == NULL)
1266 return -ENODEV;
1267 portp = tty->driver_data;
1268 if (portp == NULL)
1269 return -ENODEV;
1270
1271 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1272 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1273 if (tty->flags & (1 << TTY_IO_ERROR))
1274 return -EIO;
1275
1276 rc = 0;
1277
1278 lock_kernel();
1279
1280 switch (cmd) {
1281 case TIOCGSERIAL:
1282 rc = stl_getserial(portp, argp);
1283 break;
1284 case TIOCSSERIAL:
1285 rc = stl_setserial(portp, argp);
1286 break;
1287 case COM_GETPORTSTATS:
1288 rc = stl_getportstats(portp, argp);
1289 break;
1290 case COM_CLRPORTSTATS:
1291 rc = stl_clrportstats(portp, argp);
1292 break;
1293 case TIOCSERCONFIG:
1294 case TIOCSERGWILD:
1295 case TIOCSERSWILD:
1296 case TIOCSERGETLSR:
1297 case TIOCSERGSTRUCT:
1298 case TIOCSERGETMULTI:
1299 case TIOCSERSETMULTI:
1300 default:
1301 rc = -ENOIOCTLCMD;
1302 break;
1303 }
1304 unlock_kernel();
1305 return rc;
1306 }
1307
1308 /*****************************************************************************/
1309
1310 /*
1311 * Start the transmitter again. Just turn TX interrupts back on.
1312 */
1313
1314 static void stl_start(struct tty_struct *tty)
1315 {
1316 struct stlport *portp;
1317
1318 pr_debug("stl_start(tty=%p)\n", tty);
1319
1320 if (tty == NULL)
1321 return;
1322 portp = tty->driver_data;
1323 if (portp == NULL)
1324 return;
1325 stl_startrxtx(portp, -1, 1);
1326 }
1327
1328 /*****************************************************************************/
1329
1330 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1331 {
1332 struct stlport *portp;
1333 struct ktermios *tiosp;
1334
1335 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1336
1337 if (tty == NULL)
1338 return;
1339 portp = tty->driver_data;
1340 if (portp == NULL)
1341 return;
1342
1343 tiosp = tty->termios;
1344 if ((tiosp->c_cflag == old->c_cflag) &&
1345 (tiosp->c_iflag == old->c_iflag))
1346 return;
1347
1348 stl_setport(portp, tiosp);
1349 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1350 -1);
1351 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1352 tty->hw_stopped = 0;
1353 stl_start(tty);
1354 }
1355 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1356 wake_up_interruptible(&portp->port.open_wait);
1357 }
1358
1359 /*****************************************************************************/
1360
1361 /*
1362 * Attempt to flow control who ever is sending us data. Based on termios
1363 * settings use software or/and hardware flow control.
1364 */
1365
1366 static void stl_throttle(struct tty_struct *tty)
1367 {
1368 struct stlport *portp;
1369
1370 pr_debug("stl_throttle(tty=%p)\n", tty);
1371
1372 if (tty == NULL)
1373 return;
1374 portp = tty->driver_data;
1375 if (portp == NULL)
1376 return;
1377 stl_flowctrl(portp, 0);
1378 }
1379
1380 /*****************************************************************************/
1381
1382 /*
1383 * Unflow control the device sending us data...
1384 */
1385
1386 static void stl_unthrottle(struct tty_struct *tty)
1387 {
1388 struct stlport *portp;
1389
1390 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1391
1392 if (tty == NULL)
1393 return;
1394 portp = tty->driver_data;
1395 if (portp == NULL)
1396 return;
1397 stl_flowctrl(portp, 1);
1398 }
1399
1400 /*****************************************************************************/
1401
1402 /*
1403 * Stop the transmitter. Basically to do this we will just turn TX
1404 * interrupts off.
1405 */
1406
1407 static void stl_stop(struct tty_struct *tty)
1408 {
1409 struct stlport *portp;
1410
1411 pr_debug("stl_stop(tty=%p)\n", tty);
1412
1413 if (tty == NULL)
1414 return;
1415 portp = tty->driver_data;
1416 if (portp == NULL)
1417 return;
1418 stl_startrxtx(portp, -1, 0);
1419 }
1420
1421 /*****************************************************************************/
1422
1423 /*
1424 * Hangup this port. This is pretty much like closing the port, only
1425 * a little more brutal. No waiting for data to drain. Shutdown the
1426 * port and maybe drop signals.
1427 */
1428
1429 static void stl_hangup(struct tty_struct *tty)
1430 {
1431 struct stlport *portp;
1432
1433 pr_debug("stl_hangup(tty=%p)\n", tty);
1434
1435 if (tty == NULL)
1436 return;
1437 portp = tty->driver_data;
1438 if (portp == NULL)
1439 return;
1440
1441 portp->port.flags &= ~ASYNC_INITIALIZED;
1442 stl_disableintrs(portp);
1443 if (tty->termios->c_cflag & HUPCL)
1444 stl_setsignals(portp, 0, 0);
1445 stl_enablerxtx(portp, 0, 0);
1446 stl_flushbuffer(tty);
1447 portp->istate = 0;
1448 set_bit(TTY_IO_ERROR, &tty->flags);
1449 if (portp->tx.buf != NULL) {
1450 kfree(portp->tx.buf);
1451 portp->tx.buf = NULL;
1452 portp->tx.head = NULL;
1453 portp->tx.tail = NULL;
1454 }
1455 portp->port.tty = NULL;
1456 portp->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1457 portp->port.count = 0;
1458 wake_up_interruptible(&portp->port.open_wait);
1459 }
1460
1461 /*****************************************************************************/
1462
1463 static int stl_breakctl(struct tty_struct *tty, int state)
1464 {
1465 struct stlport *portp;
1466
1467 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1468
1469 if (tty == NULL)
1470 return -EINVAL;
1471 portp = tty->driver_data;
1472 if (portp == NULL)
1473 return -EINVAL;
1474
1475 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1476 return 0;
1477 }
1478
1479 /*****************************************************************************/
1480
1481 static void stl_sendxchar(struct tty_struct *tty, char ch)
1482 {
1483 struct stlport *portp;
1484
1485 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1486
1487 if (tty == NULL)
1488 return;
1489 portp = tty->driver_data;
1490 if (portp == NULL)
1491 return;
1492
1493 if (ch == STOP_CHAR(tty))
1494 stl_sendflow(portp, 0);
1495 else if (ch == START_CHAR(tty))
1496 stl_sendflow(portp, 1);
1497 else
1498 stl_putchar(tty, ch);
1499 }
1500
1501 /*****************************************************************************/
1502
1503 #define MAXLINE 80
1504
1505 /*
1506 * Format info for a specified port. The line is deliberately limited
1507 * to 80 characters. (If it is too long it will be truncated, if too
1508 * short then padded with spaces).
1509 */
1510
1511 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1512 {
1513 char *sp;
1514 int sigs, cnt;
1515
1516 sp = pos;
1517 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1518 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1519 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1520
1521 if (portp->stats.rxframing)
1522 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1523 if (portp->stats.rxparity)
1524 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1525 if (portp->stats.rxbreaks)
1526 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1527 if (portp->stats.rxoverrun)
1528 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1529
1530 sigs = stl_getsignals(portp);
1531 cnt = sprintf(sp, "%s%s%s%s%s ",
1532 (sigs & TIOCM_RTS) ? "|RTS" : "",
1533 (sigs & TIOCM_CTS) ? "|CTS" : "",
1534 (sigs & TIOCM_DTR) ? "|DTR" : "",
1535 (sigs & TIOCM_CD) ? "|DCD" : "",
1536 (sigs & TIOCM_DSR) ? "|DSR" : "");
1537 *sp = ' ';
1538 sp += cnt;
1539
1540 for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
1541 *sp++ = ' ';
1542 if (cnt >= MAXLINE)
1543 pos[(MAXLINE - 2)] = '+';
1544 pos[(MAXLINE - 1)] = '\n';
1545
1546 return MAXLINE;
1547 }
1548
1549 /*****************************************************************************/
1550
1551 /*
1552 * Port info, read from the /proc file system.
1553 */
1554
1555 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1556 {
1557 struct stlbrd *brdp;
1558 struct stlpanel *panelp;
1559 struct stlport *portp;
1560 unsigned int brdnr, panelnr, portnr;
1561 int totalport, curoff, maxoff;
1562 char *pos;
1563
1564 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1565 "data=%p\n", page, start, off, count, eof, data);
1566
1567 pos = page;
1568 totalport = 0;
1569 curoff = 0;
1570
1571 if (off == 0) {
1572 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1573 stl_drvversion);
1574 while (pos < (page + MAXLINE - 1))
1575 *pos++ = ' ';
1576 *pos++ = '\n';
1577 }
1578 curoff = MAXLINE;
1579
1580 /*
1581 * We scan through for each board, panel and port. The offset is
1582 * calculated on the fly, and irrelevant ports are skipped.
1583 */
1584 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1585 brdp = stl_brds[brdnr];
1586 if (brdp == NULL)
1587 continue;
1588 if (brdp->state == 0)
1589 continue;
1590
1591 maxoff = curoff + (brdp->nrports * MAXLINE);
1592 if (off >= maxoff) {
1593 curoff = maxoff;
1594 continue;
1595 }
1596
1597 totalport = brdnr * STL_MAXPORTS;
1598 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1599 panelp = brdp->panels[panelnr];
1600 if (panelp == NULL)
1601 continue;
1602
1603 maxoff = curoff + (panelp->nrports * MAXLINE);
1604 if (off >= maxoff) {
1605 curoff = maxoff;
1606 totalport += panelp->nrports;
1607 continue;
1608 }
1609
1610 for (portnr = 0; portnr < panelp->nrports; portnr++,
1611 totalport++) {
1612 portp = panelp->ports[portnr];
1613 if (portp == NULL)
1614 continue;
1615 if (off >= (curoff += MAXLINE))
1616 continue;
1617 if ((pos - page + MAXLINE) > count)
1618 goto stl_readdone;
1619 pos += stl_portinfo(portp, totalport, pos);
1620 }
1621 }
1622 }
1623
1624 *eof = 1;
1625
1626 stl_readdone:
1627 *start = page;
1628 return pos - page;
1629 }
1630
1631 /*****************************************************************************/
1632
1633 /*
1634 * All board interrupts are vectored through here first. This code then
1635 * calls off to the approrpriate board interrupt handlers.
1636 */
1637
1638 static irqreturn_t stl_intr(int irq, void *dev_id)
1639 {
1640 struct stlbrd *brdp = dev_id;
1641
1642 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1643
1644 return IRQ_RETVAL((* brdp->isr)(brdp));
1645 }
1646
1647 /*****************************************************************************/
1648
1649 /*
1650 * Interrupt service routine for EasyIO board types.
1651 */
1652
1653 static int stl_eiointr(struct stlbrd *brdp)
1654 {
1655 struct stlpanel *panelp;
1656 unsigned int iobase;
1657 int handled = 0;
1658
1659 spin_lock(&brd_lock);
1660 panelp = brdp->panels[0];
1661 iobase = panelp->iobase;
1662 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1663 handled = 1;
1664 (* panelp->isr)(panelp, iobase);
1665 }
1666 spin_unlock(&brd_lock);
1667 return handled;
1668 }
1669
1670 /*****************************************************************************/
1671
1672 /*
1673 * Interrupt service routine for ECH-AT board types.
1674 */
1675
1676 static int stl_echatintr(struct stlbrd *brdp)
1677 {
1678 struct stlpanel *panelp;
1679 unsigned int ioaddr, bnknr;
1680 int handled = 0;
1681
1682 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1683
1684 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1685 handled = 1;
1686 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1687 ioaddr = brdp->bnkstataddr[bnknr];
1688 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1689 panelp = brdp->bnk2panel[bnknr];
1690 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1691 }
1692 }
1693 }
1694
1695 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1696
1697 return handled;
1698 }
1699
1700 /*****************************************************************************/
1701
1702 /*
1703 * Interrupt service routine for ECH-MCA board types.
1704 */
1705
1706 static int stl_echmcaintr(struct stlbrd *brdp)
1707 {
1708 struct stlpanel *panelp;
1709 unsigned int ioaddr, bnknr;
1710 int handled = 0;
1711
1712 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1713 handled = 1;
1714 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1715 ioaddr = brdp->bnkstataddr[bnknr];
1716 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1717 panelp = brdp->bnk2panel[bnknr];
1718 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1719 }
1720 }
1721 }
1722 return handled;
1723 }
1724
1725 /*****************************************************************************/
1726
1727 /*
1728 * Interrupt service routine for ECH-PCI board types.
1729 */
1730
1731 static int stl_echpciintr(struct stlbrd *brdp)
1732 {
1733 struct stlpanel *panelp;
1734 unsigned int ioaddr, bnknr, recheck;
1735 int handled = 0;
1736
1737 while (1) {
1738 recheck = 0;
1739 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1740 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1741 ioaddr = brdp->bnkstataddr[bnknr];
1742 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1743 panelp = brdp->bnk2panel[bnknr];
1744 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1745 recheck++;
1746 handled = 1;
1747 }
1748 }
1749 if (! recheck)
1750 break;
1751 }
1752 return handled;
1753 }
1754
1755 /*****************************************************************************/
1756
1757 /*
1758 * Interrupt service routine for ECH-8/64-PCI board types.
1759 */
1760
1761 static int stl_echpci64intr(struct stlbrd *brdp)
1762 {
1763 struct stlpanel *panelp;
1764 unsigned int ioaddr, bnknr;
1765 int handled = 0;
1766
1767 while (inb(brdp->ioctrl) & 0x1) {
1768 handled = 1;
1769 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1770 ioaddr = brdp->bnkstataddr[bnknr];
1771 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1772 panelp = brdp->bnk2panel[bnknr];
1773 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1774 }
1775 }
1776 }
1777
1778 return handled;
1779 }
1780
1781 /*****************************************************************************/
1782
1783 /*
1784 * Initialize all the ports on a panel.
1785 */
1786
1787 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1788 {
1789 struct stlport *portp;
1790 unsigned int i;
1791 int chipmask;
1792
1793 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1794
1795 chipmask = stl_panelinit(brdp, panelp);
1796
1797 /*
1798 * All UART's are initialized (if found!). Now go through and setup
1799 * each ports data structures.
1800 */
1801 for (i = 0; i < panelp->nrports; i++) {
1802 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1803 if (!portp) {
1804 printk("STALLION: failed to allocate memory "
1805 "(size=%Zd)\n", sizeof(struct stlport));
1806 break;
1807 }
1808
1809 portp->magic = STL_PORTMAGIC;
1810 portp->portnr = i;
1811 portp->brdnr = panelp->brdnr;
1812 portp->panelnr = panelp->panelnr;
1813 portp->uartp = panelp->uartp;
1814 portp->clk = brdp->clk;
1815 portp->baud_base = STL_BAUDBASE;
1816 portp->close_delay = STL_CLOSEDELAY;
1817 portp->closing_wait = 30 * HZ;
1818 init_waitqueue_head(&portp->port.open_wait);
1819 init_waitqueue_head(&portp->port.close_wait);
1820 portp->stats.brd = portp->brdnr;
1821 portp->stats.panel = portp->panelnr;
1822 portp->stats.port = portp->portnr;
1823 panelp->ports[i] = portp;
1824 stl_portinit(brdp, panelp, portp);
1825 }
1826
1827 return 0;
1828 }
1829
1830 static void stl_cleanup_panels(struct stlbrd *brdp)
1831 {
1832 struct stlpanel *panelp;
1833 struct stlport *portp;
1834 unsigned int j, k;
1835
1836 for (j = 0; j < STL_MAXPANELS; j++) {
1837 panelp = brdp->panels[j];
1838 if (panelp == NULL)
1839 continue;
1840 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1841 portp = panelp->ports[k];
1842 if (portp == NULL)
1843 continue;
1844 if (portp->port.tty != NULL)
1845 stl_hangup(portp->port.tty);
1846 kfree(portp->tx.buf);
1847 kfree(portp);
1848 }
1849 kfree(panelp);
1850 }
1851 }
1852
1853 /*****************************************************************************/
1854
1855 /*
1856 * Try to find and initialize an EasyIO board.
1857 */
1858
1859 static int __devinit stl_initeio(struct stlbrd *brdp)
1860 {
1861 struct stlpanel *panelp;
1862 unsigned int status;
1863 char *name;
1864 int retval;
1865
1866 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1867
1868 brdp->ioctrl = brdp->ioaddr1 + 1;
1869 brdp->iostatus = brdp->ioaddr1 + 2;
1870
1871 status = inb(brdp->iostatus);
1872 if ((status & EIO_IDBITMASK) == EIO_MK3)
1873 brdp->ioctrl++;
1874
1875 /*
1876 * Handle board specific stuff now. The real difference is PCI
1877 * or not PCI.
1878 */
1879 if (brdp->brdtype == BRD_EASYIOPCI) {
1880 brdp->iosize1 = 0x80;
1881 brdp->iosize2 = 0x80;
1882 name = "serial(EIO-PCI)";
1883 outb(0x41, (brdp->ioaddr2 + 0x4c));
1884 } else {
1885 brdp->iosize1 = 8;
1886 name = "serial(EIO)";
1887 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1888 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1889 printk("STALLION: invalid irq=%d for brd=%d\n",
1890 brdp->irq, brdp->brdnr);
1891 retval = -EINVAL;
1892 goto err;
1893 }
1894 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1895 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1896 brdp->ioctrl);
1897 }
1898
1899 retval = -EBUSY;
1900 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1901 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1902 "%x conflicts with another device\n", brdp->brdnr,
1903 brdp->ioaddr1);
1904 goto err;
1905 }
1906
1907 if (brdp->iosize2 > 0)
1908 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1909 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1910 "address %x conflicts with another device\n",
1911 brdp->brdnr, brdp->ioaddr2);
1912 printk(KERN_WARNING "STALLION: Warning, also "
1913 "releasing board %d I/O address %x \n",
1914 brdp->brdnr, brdp->ioaddr1);
1915 goto err_rel1;
1916 }
1917
1918 /*
1919 * Everything looks OK, so let's go ahead and probe for the hardware.
1920 */
1921 brdp->clk = CD1400_CLK;
1922 brdp->isr = stl_eiointr;
1923
1924 retval = -ENODEV;
1925 switch (status & EIO_IDBITMASK) {
1926 case EIO_8PORTM:
1927 brdp->clk = CD1400_CLK8M;
1928 /* fall thru */
1929 case EIO_8PORTRS:
1930 case EIO_8PORTDI:
1931 brdp->nrports = 8;
1932 break;
1933 case EIO_4PORTRS:
1934 brdp->nrports = 4;
1935 break;
1936 case EIO_MK3:
1937 switch (status & EIO_BRDMASK) {
1938 case ID_BRD4:
1939 brdp->nrports = 4;
1940 break;
1941 case ID_BRD8:
1942 brdp->nrports = 8;
1943 break;
1944 case ID_BRD16:
1945 brdp->nrports = 16;
1946 break;
1947 default:
1948 goto err_rel2;
1949 }
1950 break;
1951 default:
1952 goto err_rel2;
1953 }
1954
1955 /*
1956 * We have verified that the board is actually present, so now we
1957 * can complete the setup.
1958 */
1959
1960 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1961 if (!panelp) {
1962 printk(KERN_WARNING "STALLION: failed to allocate memory "
1963 "(size=%Zd)\n", sizeof(struct stlpanel));
1964 retval = -ENOMEM;
1965 goto err_rel2;
1966 }
1967
1968 panelp->magic = STL_PANELMAGIC;
1969 panelp->brdnr = brdp->brdnr;
1970 panelp->panelnr = 0;
1971 panelp->nrports = brdp->nrports;
1972 panelp->iobase = brdp->ioaddr1;
1973 panelp->hwid = status;
1974 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1975 panelp->uartp = &stl_sc26198uart;
1976 panelp->isr = stl_sc26198intr;
1977 } else {
1978 panelp->uartp = &stl_cd1400uart;
1979 panelp->isr = stl_cd1400eiointr;
1980 }
1981
1982 brdp->panels[0] = panelp;
1983 brdp->nrpanels = 1;
1984 brdp->state |= BRD_FOUND;
1985 brdp->hwid = status;
1986 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1987 printk("STALLION: failed to register interrupt "
1988 "routine for %s irq=%d\n", name, brdp->irq);
1989 retval = -ENODEV;
1990 goto err_fr;
1991 }
1992
1993 return 0;
1994 err_fr:
1995 stl_cleanup_panels(brdp);
1996 err_rel2:
1997 if (brdp->iosize2 > 0)
1998 release_region(brdp->ioaddr2, brdp->iosize2);
1999 err_rel1:
2000 release_region(brdp->ioaddr1, brdp->iosize1);
2001 err:
2002 return retval;
2003 }
2004
2005 /*****************************************************************************/
2006
2007 /*
2008 * Try to find an ECH board and initialize it. This code is capable of
2009 * dealing with all types of ECH board.
2010 */
2011
2012 static int __devinit stl_initech(struct stlbrd *brdp)
2013 {
2014 struct stlpanel *panelp;
2015 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
2016 int retval;
2017 char *name;
2018
2019 pr_debug("stl_initech(brdp=%p)\n", brdp);
2020
2021 status = 0;
2022 conflict = 0;
2023
2024 /*
2025 * Set up the initial board register contents for boards. This varies a
2026 * bit between the different board types. So we need to handle each
2027 * separately. Also do a check that the supplied IRQ is good.
2028 */
2029 switch (brdp->brdtype) {
2030
2031 case BRD_ECH:
2032 brdp->isr = stl_echatintr;
2033 brdp->ioctrl = brdp->ioaddr1 + 1;
2034 brdp->iostatus = brdp->ioaddr1 + 1;
2035 status = inb(brdp->iostatus);
2036 if ((status & ECH_IDBITMASK) != ECH_ID) {
2037 retval = -ENODEV;
2038 goto err;
2039 }
2040 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2041 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2042 printk("STALLION: invalid irq=%d for brd=%d\n",
2043 brdp->irq, brdp->brdnr);
2044 retval = -EINVAL;
2045 goto err;
2046 }
2047 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2048 status |= (stl_vecmap[brdp->irq] << 1);
2049 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2050 brdp->ioctrlval = ECH_INTENABLE |
2051 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2052 for (i = 0; i < 10; i++)
2053 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2054 brdp->iosize1 = 2;
2055 brdp->iosize2 = 32;
2056 name = "serial(EC8/32)";
2057 outb(status, brdp->ioaddr1);
2058 break;
2059
2060 case BRD_ECHMC:
2061 brdp->isr = stl_echmcaintr;
2062 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2063 brdp->iostatus = brdp->ioctrl;
2064 status = inb(brdp->iostatus);
2065 if ((status & ECH_IDBITMASK) != ECH_ID) {
2066 retval = -ENODEV;
2067 goto err;
2068 }
2069 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2070 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2071 printk("STALLION: invalid irq=%d for brd=%d\n",
2072 brdp->irq, brdp->brdnr);
2073 retval = -EINVAL;
2074 goto err;
2075 }
2076 outb(ECHMC_BRDRESET, brdp->ioctrl);
2077 outb(ECHMC_INTENABLE, brdp->ioctrl);
2078 brdp->iosize1 = 64;
2079 name = "serial(EC8/32-MC)";
2080 break;
2081
2082 case BRD_ECHPCI:
2083 brdp->isr = stl_echpciintr;
2084 brdp->ioctrl = brdp->ioaddr1 + 2;
2085 brdp->iosize1 = 4;
2086 brdp->iosize2 = 8;
2087 name = "serial(EC8/32-PCI)";
2088 break;
2089
2090 case BRD_ECH64PCI:
2091 brdp->isr = stl_echpci64intr;
2092 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2093 outb(0x43, (brdp->ioaddr1 + 0x4c));
2094 brdp->iosize1 = 0x80;
2095 brdp->iosize2 = 0x80;
2096 name = "serial(EC8/64-PCI)";
2097 break;
2098
2099 default:
2100 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2101 retval = -EINVAL;
2102 goto err;
2103 }
2104
2105 /*
2106 * Check boards for possible IO address conflicts and return fail status
2107 * if an IO conflict found.
2108 */
2109 retval = -EBUSY;
2110 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2111 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2112 "%x conflicts with another device\n", brdp->brdnr,
2113 brdp->ioaddr1);
2114 goto err;
2115 }
2116
2117 if (brdp->iosize2 > 0)
2118 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2119 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2120 "address %x conflicts with another device\n",
2121 brdp->brdnr, brdp->ioaddr2);
2122 printk(KERN_WARNING "STALLION: Warning, also "
2123 "releasing board %d I/O address %x \n",
2124 brdp->brdnr, brdp->ioaddr1);
2125 goto err_rel1;
2126 }
2127
2128 /*
2129 * Scan through the secondary io address space looking for panels.
2130 * As we find'em allocate and initialize panel structures for each.
2131 */
2132 brdp->clk = CD1400_CLK;
2133 brdp->hwid = status;
2134
2135 ioaddr = brdp->ioaddr2;
2136 banknr = 0;
2137 panelnr = 0;
2138 nxtid = 0;
2139
2140 for (i = 0; i < STL_MAXPANELS; i++) {
2141 if (brdp->brdtype == BRD_ECHPCI) {
2142 outb(nxtid, brdp->ioctrl);
2143 ioaddr = brdp->ioaddr2;
2144 }
2145 status = inb(ioaddr + ECH_PNLSTATUS);
2146 if ((status & ECH_PNLIDMASK) != nxtid)
2147 break;
2148 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2149 if (!panelp) {
2150 printk("STALLION: failed to allocate memory "
2151 "(size=%Zd)\n", sizeof(struct stlpanel));
2152 retval = -ENOMEM;
2153 goto err_fr;
2154 }
2155 panelp->magic = STL_PANELMAGIC;
2156 panelp->brdnr = brdp->brdnr;
2157 panelp->panelnr = panelnr;
2158 panelp->iobase = ioaddr;
2159 panelp->pagenr = nxtid;
2160 panelp->hwid = status;
2161 brdp->bnk2panel[banknr] = panelp;
2162 brdp->bnkpageaddr[banknr] = nxtid;
2163 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2164
2165 if (status & ECH_PNLXPID) {
2166 panelp->uartp = &stl_sc26198uart;
2167 panelp->isr = stl_sc26198intr;
2168 if (status & ECH_PNL16PORT) {
2169 panelp->nrports = 16;
2170 brdp->bnk2panel[banknr] = panelp;
2171 brdp->bnkpageaddr[banknr] = nxtid;
2172 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2173 ECH_PNLSTATUS;
2174 } else
2175 panelp->nrports = 8;
2176 } else {
2177 panelp->uartp = &stl_cd1400uart;
2178 panelp->isr = stl_cd1400echintr;
2179 if (status & ECH_PNL16PORT) {
2180 panelp->nrports = 16;
2181 panelp->ackmask = 0x80;
2182 if (brdp->brdtype != BRD_ECHPCI)
2183 ioaddr += EREG_BANKSIZE;
2184 brdp->bnk2panel[banknr] = panelp;
2185 brdp->bnkpageaddr[banknr] = ++nxtid;
2186 brdp->bnkstataddr[banknr++] = ioaddr +
2187 ECH_PNLSTATUS;
2188 } else {
2189 panelp->nrports = 8;
2190 panelp->ackmask = 0xc0;
2191 }
2192 }
2193
2194 nxtid++;
2195 ioaddr += EREG_BANKSIZE;
2196 brdp->nrports += panelp->nrports;
2197 brdp->panels[panelnr++] = panelp;
2198 if ((brdp->brdtype != BRD_ECHPCI) &&
2199 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2200 retval = -EINVAL;
2201 goto err_fr;
2202 }
2203 }
2204
2205 brdp->nrpanels = panelnr;
2206 brdp->nrbnks = banknr;
2207 if (brdp->brdtype == BRD_ECH)
2208 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2209
2210 brdp->state |= BRD_FOUND;
2211 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2212 printk("STALLION: failed to register interrupt "
2213 "routine for %s irq=%d\n", name, brdp->irq);
2214 retval = -ENODEV;
2215 goto err_fr;
2216 }
2217
2218 return 0;
2219 err_fr:
2220 stl_cleanup_panels(brdp);
2221 if (brdp->iosize2 > 0)
2222 release_region(brdp->ioaddr2, brdp->iosize2);
2223 err_rel1:
2224 release_region(brdp->ioaddr1, brdp->iosize1);
2225 err:
2226 return retval;
2227 }
2228
2229 /*****************************************************************************/
2230
2231 /*
2232 * Initialize and configure the specified board.
2233 * Scan through all the boards in the configuration and see what we
2234 * can find. Handle EIO and the ECH boards a little differently here
2235 * since the initial search and setup is very different.
2236 */
2237
2238 static int __devinit stl_brdinit(struct stlbrd *brdp)
2239 {
2240 int i, retval;
2241
2242 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2243
2244 switch (brdp->brdtype) {
2245 case BRD_EASYIO:
2246 case BRD_EASYIOPCI:
2247 retval = stl_initeio(brdp);
2248 if (retval)
2249 goto err;
2250 break;
2251 case BRD_ECH:
2252 case BRD_ECHMC:
2253 case BRD_ECHPCI:
2254 case BRD_ECH64PCI:
2255 retval = stl_initech(brdp);
2256 if (retval)
2257 goto err;
2258 break;
2259 default:
2260 printk("STALLION: board=%d is unknown board type=%d\n",
2261 brdp->brdnr, brdp->brdtype);
2262 retval = -ENODEV;
2263 goto err;
2264 }
2265
2266 if ((brdp->state & BRD_FOUND) == 0) {
2267 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2268 stl_brdnames[brdp->brdtype], brdp->brdnr,
2269 brdp->ioaddr1, brdp->irq);
2270 goto err_free;
2271 }
2272
2273 for (i = 0; i < STL_MAXPANELS; i++)
2274 if (brdp->panels[i] != NULL)
2275 stl_initports(brdp, brdp->panels[i]);
2276
2277 printk("STALLION: %s found, board=%d io=%x irq=%d "
2278 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2279 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2280 brdp->nrports);
2281
2282 return 0;
2283 err_free:
2284 free_irq(brdp->irq, brdp);
2285
2286 stl_cleanup_panels(brdp);
2287
2288 release_region(brdp->ioaddr1, brdp->iosize1);
2289 if (brdp->iosize2 > 0)
2290 release_region(brdp->ioaddr2, brdp->iosize2);
2291 err:
2292 return retval;
2293 }
2294
2295 /*****************************************************************************/
2296
2297 /*
2298 * Find the next available board number that is free.
2299 */
2300
2301 static int __devinit stl_getbrdnr(void)
2302 {
2303 unsigned int i;
2304
2305 for (i = 0; i < STL_MAXBRDS; i++)
2306 if (stl_brds[i] == NULL) {
2307 if (i >= stl_nrbrds)
2308 stl_nrbrds = i + 1;
2309 return i;
2310 }
2311
2312 return -1;
2313 }
2314
2315 /*****************************************************************************/
2316 /*
2317 * We have a Stallion board. Allocate a board structure and
2318 * initialize it. Read its IO and IRQ resources from PCI
2319 * configuration space.
2320 */
2321
2322 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2323 const struct pci_device_id *ent)
2324 {
2325 struct stlbrd *brdp;
2326 unsigned int i, brdtype = ent->driver_data;
2327 int brdnr, retval = -ENODEV;
2328
2329 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2330 goto err;
2331
2332 retval = pci_enable_device(pdev);
2333 if (retval)
2334 goto err;
2335 brdp = stl_allocbrd();
2336 if (brdp == NULL) {
2337 retval = -ENOMEM;
2338 goto err;
2339 }
2340 mutex_lock(&stl_brdslock);
2341 brdnr = stl_getbrdnr();
2342 if (brdnr < 0) {
2343 dev_err(&pdev->dev, "too many boards found, "
2344 "maximum supported %d\n", STL_MAXBRDS);
2345 mutex_unlock(&stl_brdslock);
2346 retval = -ENODEV;
2347 goto err_fr;
2348 }
2349 brdp->brdnr = (unsigned int)brdnr;
2350 stl_brds[brdp->brdnr] = brdp;
2351 mutex_unlock(&stl_brdslock);
2352
2353 brdp->brdtype = brdtype;
2354 brdp->state |= STL_PROBED;
2355
2356 /*
2357 * We have all resources from the board, so let's setup the actual
2358 * board structure now.
2359 */
2360 switch (brdtype) {
2361 case BRD_ECHPCI:
2362 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2363 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2364 break;
2365 case BRD_ECH64PCI:
2366 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2367 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2368 break;
2369 case BRD_EASYIOPCI:
2370 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2371 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2372 break;
2373 default:
2374 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2375 break;
2376 }
2377
2378 brdp->irq = pdev->irq;
2379 retval = stl_brdinit(brdp);
2380 if (retval)
2381 goto err_null;
2382
2383 pci_set_drvdata(pdev, brdp);
2384
2385 for (i = 0; i < brdp->nrports; i++)
2386 tty_register_device(stl_serial,
2387 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2388
2389 return 0;
2390 err_null:
2391 stl_brds[brdp->brdnr] = NULL;
2392 err_fr:
2393 kfree(brdp);
2394 err:
2395 return retval;
2396 }
2397
2398 static void __devexit stl_pciremove(struct pci_dev *pdev)
2399 {
2400 struct stlbrd *brdp = pci_get_drvdata(pdev);
2401 unsigned int i;
2402
2403 free_irq(brdp->irq, brdp);
2404
2405 stl_cleanup_panels(brdp);
2406
2407 release_region(brdp->ioaddr1, brdp->iosize1);
2408 if (brdp->iosize2 > 0)
2409 release_region(brdp->ioaddr2, brdp->iosize2);
2410
2411 for (i = 0; i < brdp->nrports; i++)
2412 tty_unregister_device(stl_serial,
2413 brdp->brdnr * STL_MAXPORTS + i);
2414
2415 stl_brds[brdp->brdnr] = NULL;
2416 kfree(brdp);
2417 }
2418
2419 static struct pci_driver stl_pcidriver = {
2420 .name = "stallion",
2421 .id_table = stl_pcibrds,
2422 .probe = stl_pciprobe,
2423 .remove = __devexit_p(stl_pciremove)
2424 };
2425
2426 /*****************************************************************************/
2427
2428 /*
2429 * Return the board stats structure to user app.
2430 */
2431
2432 static int stl_getbrdstats(combrd_t __user *bp)
2433 {
2434 combrd_t stl_brdstats;
2435 struct stlbrd *brdp;
2436 struct stlpanel *panelp;
2437 unsigned int i;
2438
2439 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2440 return -EFAULT;
2441 if (stl_brdstats.brd >= STL_MAXBRDS)
2442 return -ENODEV;
2443 brdp = stl_brds[stl_brdstats.brd];
2444 if (brdp == NULL)
2445 return -ENODEV;
2446
2447 memset(&stl_brdstats, 0, sizeof(combrd_t));
2448 stl_brdstats.brd = brdp->brdnr;
2449 stl_brdstats.type = brdp->brdtype;
2450 stl_brdstats.hwid = brdp->hwid;
2451 stl_brdstats.state = brdp->state;
2452 stl_brdstats.ioaddr = brdp->ioaddr1;
2453 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2454 stl_brdstats.irq = brdp->irq;
2455 stl_brdstats.nrpanels = brdp->nrpanels;
2456 stl_brdstats.nrports = brdp->nrports;
2457 for (i = 0; i < brdp->nrpanels; i++) {
2458 panelp = brdp->panels[i];
2459 stl_brdstats.panels[i].panel = i;
2460 stl_brdstats.panels[i].hwid = panelp->hwid;
2461 stl_brdstats.panels[i].nrports = panelp->nrports;
2462 }
2463
2464 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2465 }
2466
2467 /*****************************************************************************/
2468
2469 /*
2470 * Resolve the referenced port number into a port struct pointer.
2471 */
2472
2473 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2474 {
2475 struct stlbrd *brdp;
2476 struct stlpanel *panelp;
2477
2478 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2479 return NULL;
2480 brdp = stl_brds[brdnr];
2481 if (brdp == NULL)
2482 return NULL;
2483 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2484 return NULL;
2485 panelp = brdp->panels[panelnr];
2486 if (panelp == NULL)
2487 return NULL;
2488 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2489 return NULL;
2490 return panelp->ports[portnr];
2491 }
2492
2493 /*****************************************************************************/
2494
2495 /*
2496 * Return the port stats structure to user app. A NULL port struct
2497 * pointer passed in means that we need to find out from the app
2498 * what port to get stats for (used through board control device).
2499 */
2500
2501 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2502 {
2503 comstats_t stl_comstats;
2504 unsigned char *head, *tail;
2505 unsigned long flags;
2506
2507 if (!portp) {
2508 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2509 return -EFAULT;
2510 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2511 stl_comstats.port);
2512 if (portp == NULL)
2513 return -ENODEV;
2514 }
2515
2516 portp->stats.state = portp->istate;
2517 portp->stats.flags = portp->port.flags;
2518 portp->stats.hwid = portp->hwid;
2519
2520 portp->stats.ttystate = 0;
2521 portp->stats.cflags = 0;
2522 portp->stats.iflags = 0;
2523 portp->stats.oflags = 0;
2524 portp->stats.lflags = 0;
2525 portp->stats.rxbuffered = 0;
2526
2527 spin_lock_irqsave(&stallion_lock, flags);
2528 if (portp->port.tty != NULL)
2529 if (portp->port.tty->driver_data == portp) {
2530 portp->stats.ttystate = portp->port.tty->flags;
2531 /* No longer available as a statistic */
2532 portp->stats.rxbuffered = 1; /*portp->port.tty->flip.count; */
2533 if (portp->port.tty->termios != NULL) {
2534 portp->stats.cflags = portp->port.tty->termios->c_cflag;
2535 portp->stats.iflags = portp->port.tty->termios->c_iflag;
2536 portp->stats.oflags = portp->port.tty->termios->c_oflag;
2537 portp->stats.lflags = portp->port.tty->termios->c_lflag;
2538 }
2539 }
2540 spin_unlock_irqrestore(&stallion_lock, flags);
2541
2542 head = portp->tx.head;
2543 tail = portp->tx.tail;
2544 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2545 (STL_TXBUFSIZE - (tail - head));
2546
2547 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2548
2549 return copy_to_user(cp, &portp->stats,
2550 sizeof(comstats_t)) ? -EFAULT : 0;
2551 }
2552
2553 /*****************************************************************************/
2554
2555 /*
2556 * Clear the port stats structure. We also return it zeroed out...
2557 */
2558
2559 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2560 {
2561 comstats_t stl_comstats;
2562
2563 if (!portp) {
2564 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2565 return -EFAULT;
2566 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2567 stl_comstats.port);
2568 if (portp == NULL)
2569 return -ENODEV;
2570 }
2571
2572 memset(&portp->stats, 0, sizeof(comstats_t));
2573 portp->stats.brd = portp->brdnr;
2574 portp->stats.panel = portp->panelnr;
2575 portp->stats.port = portp->portnr;
2576 return copy_to_user(cp, &portp->stats,
2577 sizeof(comstats_t)) ? -EFAULT : 0;
2578 }
2579
2580 /*****************************************************************************/
2581
2582 /*
2583 * Return the entire driver ports structure to a user app.
2584 */
2585
2586 static int stl_getportstruct(struct stlport __user *arg)
2587 {
2588 struct stlport stl_dummyport;
2589 struct stlport *portp;
2590
2591 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2592 return -EFAULT;
2593 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2594 stl_dummyport.portnr);
2595 if (!portp)
2596 return -ENODEV;
2597 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2598 }
2599
2600 /*****************************************************************************/
2601
2602 /*
2603 * Return the entire driver board structure to a user app.
2604 */
2605
2606 static int stl_getbrdstruct(struct stlbrd __user *arg)
2607 {
2608 struct stlbrd stl_dummybrd;
2609 struct stlbrd *brdp;
2610
2611 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2612 return -EFAULT;
2613 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2614 return -ENODEV;
2615 brdp = stl_brds[stl_dummybrd.brdnr];
2616 if (!brdp)
2617 return -ENODEV;
2618 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2619 }
2620
2621 /*****************************************************************************/
2622
2623 /*
2624 * The "staliomem" device is also required to do some special operations
2625 * on the board and/or ports. In this driver it is mostly used for stats
2626 * collection.
2627 */
2628
2629 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2630 {
2631 int brdnr, rc;
2632 void __user *argp = (void __user *)arg;
2633
2634 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2635
2636 brdnr = iminor(ip);
2637 if (brdnr >= STL_MAXBRDS)
2638 return -ENODEV;
2639 rc = 0;
2640
2641 switch (cmd) {
2642 case COM_GETPORTSTATS:
2643 rc = stl_getportstats(NULL, argp);
2644 break;
2645 case COM_CLRPORTSTATS:
2646 rc = stl_clrportstats(NULL, argp);
2647 break;
2648 case COM_GETBRDSTATS:
2649 rc = stl_getbrdstats(argp);
2650 break;
2651 case COM_READPORT:
2652 rc = stl_getportstruct(argp);
2653 break;
2654 case COM_READBOARD:
2655 rc = stl_getbrdstruct(argp);
2656 break;
2657 default:
2658 rc = -ENOIOCTLCMD;
2659 break;
2660 }
2661
2662 return rc;
2663 }
2664
2665 static const struct tty_operations stl_ops = {
2666 .open = stl_open,
2667 .close = stl_close,
2668 .write = stl_write,
2669 .put_char = stl_putchar,
2670 .flush_chars = stl_flushchars,
2671 .write_room = stl_writeroom,
2672 .chars_in_buffer = stl_charsinbuffer,
2673 .ioctl = stl_ioctl,
2674 .set_termios = stl_settermios,
2675 .throttle = stl_throttle,
2676 .unthrottle = stl_unthrottle,
2677 .stop = stl_stop,
2678 .start = stl_start,
2679 .hangup = stl_hangup,
2680 .flush_buffer = stl_flushbuffer,
2681 .break_ctl = stl_breakctl,
2682 .wait_until_sent = stl_waituntilsent,
2683 .send_xchar = stl_sendxchar,
2684 .read_proc = stl_readproc,
2685 .tiocmget = stl_tiocmget,
2686 .tiocmset = stl_tiocmset,
2687 };
2688
2689 /*****************************************************************************/
2690 /* CD1400 HARDWARE FUNCTIONS */
2691 /*****************************************************************************/
2692
2693 /*
2694 * These functions get/set/update the registers of the cd1400 UARTs.
2695 * Access to the cd1400 registers is via an address/data io port pair.
2696 * (Maybe should make this inline...)
2697 */
2698
2699 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2700 {
2701 outb((regnr + portp->uartaddr), portp->ioaddr);
2702 return inb(portp->ioaddr + EREG_DATA);
2703 }
2704
2705 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2706 {
2707 outb(regnr + portp->uartaddr, portp->ioaddr);
2708 outb(value, portp->ioaddr + EREG_DATA);
2709 }
2710
2711 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2712 {
2713 outb(regnr + portp->uartaddr, portp->ioaddr);
2714 if (inb(portp->ioaddr + EREG_DATA) != value) {
2715 outb(value, portp->ioaddr + EREG_DATA);
2716 return 1;
2717 }
2718 return 0;
2719 }
2720
2721 /*****************************************************************************/
2722
2723 /*
2724 * Inbitialize the UARTs in a panel. We don't care what sort of board
2725 * these ports are on - since the port io registers are almost
2726 * identical when dealing with ports.
2727 */
2728
2729 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2730 {
2731 unsigned int gfrcr;
2732 int chipmask, i, j;
2733 int nrchips, uartaddr, ioaddr;
2734 unsigned long flags;
2735
2736 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2737
2738 spin_lock_irqsave(&brd_lock, flags);
2739 BRDENABLE(panelp->brdnr, panelp->pagenr);
2740
2741 /*
2742 * Check that each chip is present and started up OK.
2743 */
2744 chipmask = 0;
2745 nrchips = panelp->nrports / CD1400_PORTS;
2746 for (i = 0; i < nrchips; i++) {
2747 if (brdp->brdtype == BRD_ECHPCI) {
2748 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2749 ioaddr = panelp->iobase;
2750 } else
2751 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2752 uartaddr = (i & 0x01) ? 0x080 : 0;
2753 outb((GFRCR + uartaddr), ioaddr);
2754 outb(0, (ioaddr + EREG_DATA));
2755 outb((CCR + uartaddr), ioaddr);
2756 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2757 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2758 outb((GFRCR + uartaddr), ioaddr);
2759 for (j = 0; j < CCR_MAXWAIT; j++)
2760 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2761 break;
2762
2763 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2764 printk("STALLION: cd1400 not responding, "
2765 "brd=%d panel=%d chip=%d\n",
2766 panelp->brdnr, panelp->panelnr, i);
2767 continue;
2768 }
2769 chipmask |= (0x1 << i);
2770 outb((PPR + uartaddr), ioaddr);
2771 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2772 }
2773
2774 BRDDISABLE(panelp->brdnr);
2775 spin_unlock_irqrestore(&brd_lock, flags);
2776 return chipmask;
2777 }
2778
2779 /*****************************************************************************/
2780
2781 /*
2782 * Initialize hardware specific port registers.
2783 */
2784
2785 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2786 {
2787 unsigned long flags;
2788 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2789 panelp, portp);
2790
2791 if ((brdp == NULL) || (panelp == NULL) ||
2792 (portp == NULL))
2793 return;
2794
2795 spin_lock_irqsave(&brd_lock, flags);
2796 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2797 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2798 portp->uartaddr = (portp->portnr & 0x04) << 5;
2799 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2800
2801 BRDENABLE(portp->brdnr, portp->pagenr);
2802 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2803 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2804 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2805 BRDDISABLE(portp->brdnr);
2806 spin_unlock_irqrestore(&brd_lock, flags);
2807 }
2808
2809 /*****************************************************************************/
2810
2811 /*
2812 * Wait for the command register to be ready. We will poll this,
2813 * since it won't usually take too long to be ready.
2814 */
2815
2816 static void stl_cd1400ccrwait(struct stlport *portp)
2817 {
2818 int i;
2819
2820 for (i = 0; i < CCR_MAXWAIT; i++)
2821 if (stl_cd1400getreg(portp, CCR) == 0)
2822 return;
2823
2824 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2825 portp->portnr, portp->panelnr, portp->brdnr);
2826 }
2827
2828 /*****************************************************************************/
2829
2830 /*
2831 * Set up the cd1400 registers for a port based on the termios port
2832 * settings.
2833 */
2834
2835 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2836 {
2837 struct stlbrd *brdp;
2838 unsigned long flags;
2839 unsigned int clkdiv, baudrate;
2840 unsigned char cor1, cor2, cor3;
2841 unsigned char cor4, cor5, ccr;
2842 unsigned char srer, sreron, sreroff;
2843 unsigned char mcor1, mcor2, rtpr;
2844 unsigned char clk, div;
2845
2846 cor1 = 0;
2847 cor2 = 0;
2848 cor3 = 0;
2849 cor4 = 0;
2850 cor5 = 0;
2851 ccr = 0;
2852 rtpr = 0;
2853 clk = 0;
2854 div = 0;
2855 mcor1 = 0;
2856 mcor2 = 0;
2857 sreron = 0;
2858 sreroff = 0;
2859
2860 brdp = stl_brds[portp->brdnr];
2861 if (brdp == NULL)
2862 return;
2863
2864 /*
2865 * Set up the RX char ignore mask with those RX error types we
2866 * can ignore. We can get the cd1400 to help us out a little here,
2867 * it will ignore parity errors and breaks for us.
2868 */
2869 portp->rxignoremsk = 0;
2870 if (tiosp->c_iflag & IGNPAR) {
2871 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2872 cor1 |= COR1_PARIGNORE;
2873 }
2874 if (tiosp->c_iflag & IGNBRK) {
2875 portp->rxignoremsk |= ST_BREAK;
2876 cor4 |= COR4_IGNBRK;
2877 }
2878
2879 portp->rxmarkmsk = ST_OVERRUN;
2880 if (tiosp->c_iflag & (INPCK | PARMRK))
2881 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2882 if (tiosp->c_iflag & BRKINT)
2883 portp->rxmarkmsk |= ST_BREAK;
2884
2885 /*
2886 * Go through the char size, parity and stop bits and set all the
2887 * option register appropriately.
2888 */
2889 switch (tiosp->c_cflag & CSIZE) {
2890 case CS5:
2891 cor1 |= COR1_CHL5;
2892 break;
2893 case CS6:
2894 cor1 |= COR1_CHL6;
2895 break;
2896 case CS7:
2897 cor1 |= COR1_CHL7;
2898 break;
2899 default:
2900 cor1 |= COR1_CHL8;
2901 break;
2902 }
2903
2904 if (tiosp->c_cflag & CSTOPB)
2905 cor1 |= COR1_STOP2;
2906 else
2907 cor1 |= COR1_STOP1;
2908
2909 if (tiosp->c_cflag & PARENB) {
2910 if (tiosp->c_cflag & PARODD)
2911 cor1 |= (COR1_PARENB | COR1_PARODD);
2912 else
2913 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2914 } else {
2915 cor1 |= COR1_PARNONE;
2916 }
2917
2918 /*
2919 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2920 * space for hardware flow control and the like. This should be set to
2921 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2922 * really be based on VTIME.
2923 */
2924 cor3 |= FIFO_RXTHRESHOLD;
2925 rtpr = 2;
2926
2927 /*
2928 * Calculate the baud rate timers. For now we will just assume that
2929 * the input and output baud are the same. Could have used a baud
2930 * table here, but this way we can generate virtually any baud rate
2931 * we like!
2932 */
2933 baudrate = tiosp->c_cflag & CBAUD;
2934 if (baudrate & CBAUDEX) {
2935 baudrate &= ~CBAUDEX;
2936 if ((baudrate < 1) || (baudrate > 4))
2937 tiosp->c_cflag &= ~CBAUDEX;
2938 else
2939 baudrate += 15;
2940 }
2941 baudrate = stl_baudrates[baudrate];
2942 if ((tiosp->c_cflag & CBAUD) == B38400) {
2943 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2944 baudrate = 57600;
2945 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2946 baudrate = 115200;
2947 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2948 baudrate = 230400;
2949 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2950 baudrate = 460800;
2951 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2952 baudrate = (portp->baud_base / portp->custom_divisor);
2953 }
2954 if (baudrate > STL_CD1400MAXBAUD)
2955 baudrate = STL_CD1400MAXBAUD;
2956
2957 if (baudrate > 0) {
2958 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2959 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2960 if (clkdiv < 0x100)
2961 break;
2962 }
2963 div = (unsigned char) clkdiv;
2964 }
2965
2966 /*
2967 * Check what form of modem signaling is required and set it up.
2968 */
2969 if ((tiosp->c_cflag & CLOCAL) == 0) {
2970 mcor1 |= MCOR1_DCD;
2971 mcor2 |= MCOR2_DCD;
2972 sreron |= SRER_MODEM;
2973 portp->port.flags |= ASYNC_CHECK_CD;
2974 } else
2975 portp->port.flags &= ~ASYNC_CHECK_CD;
2976
2977 /*
2978 * Setup cd1400 enhanced modes if we can. In particular we want to
2979 * handle as much of the flow control as possible automatically. As
2980 * well as saving a few CPU cycles it will also greatly improve flow
2981 * control reliability.
2982 */
2983 if (tiosp->c_iflag & IXON) {
2984 cor2 |= COR2_TXIBE;
2985 cor3 |= COR3_SCD12;
2986 if (tiosp->c_iflag & IXANY)
2987 cor2 |= COR2_IXM;
2988 }
2989
2990 if (tiosp->c_cflag & CRTSCTS) {
2991 cor2 |= COR2_CTSAE;
2992 mcor1 |= FIFO_RTSTHRESHOLD;
2993 }
2994
2995 /*
2996 * All cd1400 register values calculated so go through and set
2997 * them all up.
2998 */
2999
3000 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3001 portp->portnr, portp->panelnr, portp->brdnr);
3002 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3003 cor1, cor2, cor3, cor4, cor5);
3004 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3005 mcor1, mcor2, rtpr, sreron, sreroff);
3006 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3007 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3008 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3009 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3010
3011 spin_lock_irqsave(&brd_lock, flags);
3012 BRDENABLE(portp->brdnr, portp->pagenr);
3013 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3014 srer = stl_cd1400getreg(portp, SRER);
3015 stl_cd1400setreg(portp, SRER, 0);
3016 if (stl_cd1400updatereg(portp, COR1, cor1))
3017 ccr = 1;
3018 if (stl_cd1400updatereg(portp, COR2, cor2))
3019 ccr = 1;
3020 if (stl_cd1400updatereg(portp, COR3, cor3))
3021 ccr = 1;
3022 if (ccr) {
3023 stl_cd1400ccrwait(portp);
3024 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3025 }
3026 stl_cd1400setreg(portp, COR4, cor4);
3027 stl_cd1400setreg(portp, COR5, cor5);
3028 stl_cd1400setreg(portp, MCOR1, mcor1);
3029 stl_cd1400setreg(portp, MCOR2, mcor2);
3030 if (baudrate > 0) {
3031 stl_cd1400setreg(portp, TCOR, clk);
3032 stl_cd1400setreg(portp, TBPR, div);
3033 stl_cd1400setreg(portp, RCOR, clk);
3034 stl_cd1400setreg(portp, RBPR, div);
3035 }
3036 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3037 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3038 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3039 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3040 stl_cd1400setreg(portp, RTPR, rtpr);
3041 mcor1 = stl_cd1400getreg(portp, MSVR1);
3042 if (mcor1 & MSVR1_DCD)
3043 portp->sigs |= TIOCM_CD;
3044 else
3045 portp->sigs &= ~TIOCM_CD;
3046 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3047 BRDDISABLE(portp->brdnr);
3048 spin_unlock_irqrestore(&brd_lock, flags);
3049 }
3050
3051 /*****************************************************************************/
3052
3053 /*
3054 * Set the state of the DTR and RTS signals.
3055 */
3056
3057 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3058 {
3059 unsigned char msvr1, msvr2;
3060 unsigned long flags;
3061
3062 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3063 portp, dtr, rts);
3064
3065 msvr1 = 0;
3066 msvr2 = 0;
3067 if (dtr > 0)
3068 msvr1 = MSVR1_DTR;
3069 if (rts > 0)
3070 msvr2 = MSVR2_RTS;
3071
3072 spin_lock_irqsave(&brd_lock, flags);
3073 BRDENABLE(portp->brdnr, portp->pagenr);
3074 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3075 if (rts >= 0)
3076 stl_cd1400setreg(portp, MSVR2, msvr2);
3077 if (dtr >= 0)
3078 stl_cd1400setreg(portp, MSVR1, msvr1);
3079 BRDDISABLE(portp->brdnr);
3080 spin_unlock_irqrestore(&brd_lock, flags);
3081 }
3082
3083 /*****************************************************************************/
3084
3085 /*
3086 * Return the state of the signals.
3087 */
3088
3089 static int stl_cd1400getsignals(struct stlport *portp)
3090 {
3091 unsigned char msvr1, msvr2;
3092 unsigned long flags;
3093 int sigs;
3094
3095 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3096
3097 spin_lock_irqsave(&brd_lock, flags);
3098 BRDENABLE(portp->brdnr, portp->pagenr);
3099 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3100 msvr1 = stl_cd1400getreg(portp, MSVR1);
3101 msvr2 = stl_cd1400getreg(portp, MSVR2);
3102 BRDDISABLE(portp->brdnr);
3103 spin_unlock_irqrestore(&brd_lock, flags);
3104
3105 sigs = 0;
3106 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3107 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3108 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3109 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3110 #if 0
3111 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3112 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3113 #else
3114 sigs |= TIOCM_DSR;
3115 #endif
3116 return sigs;
3117 }
3118
3119 /*****************************************************************************/
3120
3121 /*
3122 * Enable/Disable the Transmitter and/or Receiver.
3123 */
3124
3125 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3126 {
3127 unsigned char ccr;
3128 unsigned long flags;
3129
3130 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3131
3132 ccr = 0;
3133
3134 if (tx == 0)
3135 ccr |= CCR_TXDISABLE;
3136 else if (tx > 0)
3137 ccr |= CCR_TXENABLE;
3138 if (rx == 0)
3139 ccr |= CCR_RXDISABLE;
3140 else if (rx > 0)
3141 ccr |= CCR_RXENABLE;
3142
3143 spin_lock_irqsave(&brd_lock, flags);
3144 BRDENABLE(portp->brdnr, portp->pagenr);
3145 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3146 stl_cd1400ccrwait(portp);
3147 stl_cd1400setreg(portp, CCR, ccr);
3148 stl_cd1400ccrwait(portp);
3149 BRDDISABLE(portp->brdnr);
3150 spin_unlock_irqrestore(&brd_lock, flags);
3151 }
3152
3153 /*****************************************************************************/
3154
3155 /*
3156 * Start/stop the Transmitter and/or Receiver.
3157 */
3158
3159 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3160 {
3161 unsigned char sreron, sreroff;
3162 unsigned long flags;
3163
3164 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3165
3166 sreron = 0;
3167 sreroff = 0;
3168 if (tx == 0)
3169 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3170 else if (tx == 1)
3171 sreron |= SRER_TXDATA;
3172 else if (tx >= 2)
3173 sreron |= SRER_TXEMPTY;
3174 if (rx == 0)
3175 sreroff |= SRER_RXDATA;
3176 else if (rx > 0)
3177 sreron |= SRER_RXDATA;
3178
3179 spin_lock_irqsave(&brd_lock, flags);
3180 BRDENABLE(portp->brdnr, portp->pagenr);
3181 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3182 stl_cd1400setreg(portp, SRER,
3183 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3184 BRDDISABLE(portp->brdnr);
3185 if (tx > 0)
3186 set_bit(ASYI_TXBUSY, &portp->istate);
3187 spin_unlock_irqrestore(&brd_lock, flags);
3188 }
3189
3190 /*****************************************************************************/
3191
3192 /*
3193 * Disable all interrupts from this port.
3194 */
3195
3196 static void stl_cd1400disableintrs(struct stlport *portp)
3197 {
3198 unsigned long flags;
3199
3200 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3201
3202 spin_lock_irqsave(&brd_lock, flags);
3203 BRDENABLE(portp->brdnr, portp->pagenr);
3204 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3205 stl_cd1400setreg(portp, SRER, 0);
3206 BRDDISABLE(portp->brdnr);
3207 spin_unlock_irqrestore(&brd_lock, flags);
3208 }
3209
3210 /*****************************************************************************/
3211
3212 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3213 {
3214 unsigned long flags;
3215
3216 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3217
3218 spin_lock_irqsave(&brd_lock, flags);
3219 BRDENABLE(portp->brdnr, portp->pagenr);
3220 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3221 stl_cd1400setreg(portp, SRER,
3222 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3223 SRER_TXEMPTY));
3224 BRDDISABLE(portp->brdnr);
3225 portp->brklen = len;
3226 if (len == 1)
3227 portp->stats.txbreaks++;
3228 spin_unlock_irqrestore(&brd_lock, flags);
3229 }
3230
3231 /*****************************************************************************/
3232
3233 /*
3234 * Take flow control actions...
3235 */
3236
3237 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3238 {
3239 struct tty_struct *tty;
3240 unsigned long flags;
3241
3242 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3243
3244 if (portp == NULL)
3245 return;
3246 tty = portp->port.tty;
3247 if (tty == NULL)
3248 return;
3249
3250 spin_lock_irqsave(&brd_lock, flags);
3251 BRDENABLE(portp->brdnr, portp->pagenr);
3252 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3253
3254 if (state) {
3255 if (tty->termios->c_iflag & IXOFF) {
3256 stl_cd1400ccrwait(portp);
3257 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3258 portp->stats.rxxon++;
3259 stl_cd1400ccrwait(portp);
3260 }
3261 /*
3262 * Question: should we return RTS to what it was before? It may
3263 * have been set by an ioctl... Suppose not, since if you have
3264 * hardware flow control set then it is pretty silly to go and
3265 * set the RTS line by hand.
3266 */
3267 if (tty->termios->c_cflag & CRTSCTS) {
3268 stl_cd1400setreg(portp, MCOR1,
3269 (stl_cd1400getreg(portp, MCOR1) |
3270 FIFO_RTSTHRESHOLD));
3271 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3272 portp->stats.rxrtson++;
3273 }
3274 } else {
3275 if (tty->termios->c_iflag & IXOFF) {
3276 stl_cd1400ccrwait(portp);
3277 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3278 portp->stats.rxxoff++;
3279 stl_cd1400ccrwait(portp);
3280 }
3281 if (tty->termios->c_cflag & CRTSCTS) {
3282 stl_cd1400setreg(portp, MCOR1,
3283 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3284 stl_cd1400setreg(portp, MSVR2, 0);
3285 portp->stats.rxrtsoff++;
3286 }
3287 }
3288
3289 BRDDISABLE(portp->brdnr);
3290 spin_unlock_irqrestore(&brd_lock, flags);
3291 }
3292
3293 /*****************************************************************************/
3294
3295 /*
3296 * Send a flow control character...
3297 */
3298
3299 static void stl_cd1400sendflow(struct stlport *portp, int state)
3300 {
3301 struct tty_struct *tty;
3302 unsigned long flags;
3303
3304 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3305
3306 if (portp == NULL)
3307 return;
3308 tty = portp->port.tty;
3309 if (tty == NULL)
3310 return;
3311
3312 spin_lock_irqsave(&brd_lock, flags);
3313 BRDENABLE(portp->brdnr, portp->pagenr);
3314 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3315 if (state) {
3316 stl_cd1400ccrwait(portp);
3317 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3318 portp->stats.rxxon++;
3319 stl_cd1400ccrwait(portp);
3320 } else {
3321 stl_cd1400ccrwait(portp);
3322 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3323 portp->stats.rxxoff++;
3324 stl_cd1400ccrwait(portp);
3325 }
3326 BRDDISABLE(portp->brdnr);
3327 spin_unlock_irqrestore(&brd_lock, flags);
3328 }
3329
3330 /*****************************************************************************/
3331
3332 static void stl_cd1400flush(struct stlport *portp)
3333 {
3334 unsigned long flags;
3335
3336 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3337
3338 if (portp == NULL)
3339 return;
3340
3341 spin_lock_irqsave(&brd_lock, flags);
3342 BRDENABLE(portp->brdnr, portp->pagenr);
3343 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3344 stl_cd1400ccrwait(portp);
3345 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3346 stl_cd1400ccrwait(portp);
3347 portp->tx.tail = portp->tx.head;
3348 BRDDISABLE(portp->brdnr);
3349 spin_unlock_irqrestore(&brd_lock, flags);
3350 }
3351
3352 /*****************************************************************************/
3353
3354 /*
3355 * Return the current state of data flow on this port. This is only
3356 * really interresting when determining if data has fully completed
3357 * transmission or not... This is easy for the cd1400, it accurately
3358 * maintains the busy port flag.
3359 */
3360
3361 static int stl_cd1400datastate(struct stlport *portp)
3362 {
3363 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3364
3365 if (portp == NULL)
3366 return 0;
3367
3368 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3369 }
3370
3371 /*****************************************************************************/
3372
3373 /*
3374 * Interrupt service routine for cd1400 EasyIO boards.
3375 */
3376
3377 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3378 {
3379 unsigned char svrtype;
3380
3381 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3382
3383 spin_lock(&brd_lock);
3384 outb(SVRR, iobase);
3385 svrtype = inb(iobase + EREG_DATA);
3386 if (panelp->nrports > 4) {
3387 outb((SVRR + 0x80), iobase);
3388 svrtype |= inb(iobase + EREG_DATA);
3389 }
3390
3391 if (svrtype & SVRR_RX)
3392 stl_cd1400rxisr(panelp, iobase);
3393 else if (svrtype & SVRR_TX)
3394 stl_cd1400txisr(panelp, iobase);
3395 else if (svrtype & SVRR_MDM)
3396 stl_cd1400mdmisr(panelp, iobase);
3397
3398 spin_unlock(&brd_lock);
3399 }
3400
3401 /*****************************************************************************/
3402
3403 /*
3404 * Interrupt service routine for cd1400 panels.
3405 */
3406
3407 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3408 {
3409 unsigned char svrtype;
3410
3411 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3412
3413 outb(SVRR, iobase);
3414 svrtype = inb(iobase + EREG_DATA);
3415 outb((SVRR + 0x80), iobase);
3416 svrtype |= inb(iobase + EREG_DATA);
3417 if (svrtype & SVRR_RX)
3418 stl_cd1400rxisr(panelp, iobase);
3419 else if (svrtype & SVRR_TX)
3420 stl_cd1400txisr(panelp, iobase);
3421 else if (svrtype & SVRR_MDM)
3422 stl_cd1400mdmisr(panelp, iobase);
3423 }
3424
3425
3426 /*****************************************************************************/
3427
3428 /*
3429 * Unfortunately we need to handle breaks in the TX data stream, since
3430 * this is the only way to generate them on the cd1400.
3431 */
3432
3433 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3434 {
3435 if (portp->brklen == 1) {
3436 outb((COR2 + portp->uartaddr), ioaddr);
3437 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3438 (ioaddr + EREG_DATA));
3439 outb((TDR + portp->uartaddr), ioaddr);
3440 outb(ETC_CMD, (ioaddr + EREG_DATA));
3441 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3442 outb((SRER + portp->uartaddr), ioaddr);
3443 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3444 (ioaddr + EREG_DATA));
3445 return 1;
3446 } else if (portp->brklen > 1) {
3447 outb((TDR + portp->uartaddr), ioaddr);
3448 outb(ETC_CMD, (ioaddr + EREG_DATA));
3449 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3450 portp->brklen = -1;
3451 return 1;
3452 } else {
3453 outb((COR2 + portp->uartaddr), ioaddr);
3454 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3455 (ioaddr + EREG_DATA));
3456 portp->brklen = 0;
3457 }
3458 return 0;
3459 }
3460
3461 /*****************************************************************************/
3462
3463 /*
3464 * Transmit interrupt handler. This has gotta be fast! Handling TX
3465 * chars is pretty simple, stuff as many as possible from the TX buffer
3466 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3467 * are embedded as commands in the data stream. Oh no, had to use a goto!
3468 * This could be optimized more, will do when I get time...
3469 * In practice it is possible that interrupts are enabled but that the
3470 * port has been hung up. Need to handle not having any TX buffer here,
3471 * this is done by using the side effect that head and tail will also
3472 * be NULL if the buffer has been freed.
3473 */
3474
3475 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3476 {
3477 struct stlport *portp;
3478 int len, stlen;
3479 char *head, *tail;
3480 unsigned char ioack, srer;
3481
3482 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3483
3484 ioack = inb(ioaddr + EREG_TXACK);
3485 if (((ioack & panelp->ackmask) != 0) ||
3486 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3487 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3488 return;
3489 }
3490 portp = panelp->ports[(ioack >> 3)];
3491
3492 /*
3493 * Unfortunately we need to handle breaks in the data stream, since
3494 * this is the only way to generate them on the cd1400. Do it now if
3495 * a break is to be sent.
3496 */
3497 if (portp->brklen != 0)
3498 if (stl_cd1400breakisr(portp, ioaddr))
3499 goto stl_txalldone;
3500
3501 head = portp->tx.head;
3502 tail = portp->tx.tail;
3503 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3504 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3505 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3506 set_bit(ASYI_TXLOW, &portp->istate);
3507 if (portp->port.tty)
3508 tty_wakeup(portp->port.tty);
3509 }
3510
3511 if (len == 0) {
3512 outb((SRER + portp->uartaddr), ioaddr);
3513 srer = inb(ioaddr + EREG_DATA);
3514 if (srer & SRER_TXDATA) {
3515 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3516 } else {
3517 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3518 clear_bit(ASYI_TXBUSY, &portp->istate);
3519 }
3520 outb(srer, (ioaddr + EREG_DATA));
3521 } else {
3522 len = min(len, CD1400_TXFIFOSIZE);
3523 portp->stats.txtotal += len;
3524 stlen = min_t(unsigned int, len,
3525 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3526 outb((TDR + portp->uartaddr), ioaddr);
3527 outsb((ioaddr + EREG_DATA), tail, stlen);
3528 len -= stlen;
3529 tail += stlen;
3530 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3531 tail = portp->tx.buf;
3532 if (len > 0) {
3533 outsb((ioaddr + EREG_DATA), tail, len);
3534 tail += len;
3535 }
3536 portp->tx.tail = tail;
3537 }
3538
3539 stl_txalldone:
3540 outb((EOSRR + portp->uartaddr), ioaddr);
3541 outb(0, (ioaddr + EREG_DATA));
3542 }
3543
3544 /*****************************************************************************/
3545
3546 /*
3547 * Receive character interrupt handler. Determine if we have good chars
3548 * or bad chars and then process appropriately. Good chars are easy
3549 * just shove the lot into the RX buffer and set all status byte to 0.
3550 * If a bad RX char then process as required. This routine needs to be
3551 * fast! In practice it is possible that we get an interrupt on a port
3552 * that is closed. This can happen on hangups - since they completely
3553 * shutdown a port not in user context. Need to handle this case.
3554 */
3555
3556 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3557 {
3558 struct stlport *portp;
3559 struct tty_struct *tty;
3560 unsigned int ioack, len, buflen;
3561 unsigned char status;
3562 char ch;
3563
3564 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3565
3566 ioack = inb(ioaddr + EREG_RXACK);
3567 if ((ioack & panelp->ackmask) != 0) {
3568 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3569 return;
3570 }
3571 portp = panelp->ports[(ioack >> 3)];
3572 tty = portp->port.tty;
3573
3574 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3575 outb((RDCR + portp->uartaddr), ioaddr);
3576 len = inb(ioaddr + EREG_DATA);
3577 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3578 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3579 outb((RDSR + portp->uartaddr), ioaddr);
3580 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3581 portp->stats.rxlost += len;
3582 portp->stats.rxtotal += len;
3583 } else {
3584 len = min(len, buflen);
3585 if (len > 0) {
3586 unsigned char *ptr;
3587 outb((RDSR + portp->uartaddr), ioaddr);
3588 tty_prepare_flip_string(tty, &ptr, len);
3589 insb((ioaddr + EREG_DATA), ptr, len);
3590 tty_schedule_flip(tty);
3591 portp->stats.rxtotal += len;
3592 }
3593 }
3594 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3595 outb((RDSR + portp->uartaddr), ioaddr);
3596 status = inb(ioaddr + EREG_DATA);
3597 ch = inb(ioaddr + EREG_DATA);
3598 if (status & ST_PARITY)
3599 portp->stats.rxparity++;
3600 if (status & ST_FRAMING)
3601 portp->stats.rxframing++;
3602 if (status & ST_OVERRUN)
3603 portp->stats.rxoverrun++;
3604 if (status & ST_BREAK)
3605 portp->stats.rxbreaks++;
3606 if (status & ST_SCHARMASK) {
3607 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3608 portp->stats.txxon++;
3609 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3610 portp->stats.txxoff++;
3611 goto stl_rxalldone;
3612 }
3613 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3614 if (portp->rxmarkmsk & status) {
3615 if (status & ST_BREAK) {
3616 status = TTY_BREAK;
3617 if (portp->port.flags & ASYNC_SAK) {
3618 do_SAK(tty);
3619 BRDENABLE(portp->brdnr, portp->pagenr);
3620 }
3621 } else if (status & ST_PARITY)
3622 status = TTY_PARITY;
3623 else if (status & ST_FRAMING)
3624 status = TTY_FRAME;
3625 else if(status & ST_OVERRUN)
3626 status = TTY_OVERRUN;
3627 else
3628 status = 0;
3629 } else
3630 status = 0;
3631 tty_insert_flip_char(tty, ch, status);
3632 tty_schedule_flip(tty);
3633 }
3634 } else {
3635 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3636 return;
3637 }
3638
3639 stl_rxalldone:
3640 outb((EOSRR + portp->uartaddr), ioaddr);
3641 outb(0, (ioaddr + EREG_DATA));
3642 }
3643
3644 /*****************************************************************************/
3645
3646 /*
3647 * Modem interrupt handler. The is called when the modem signal line
3648 * (DCD) has changed state. Leave most of the work to the off-level
3649 * processing routine.
3650 */
3651
3652 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3653 {
3654 struct stlport *portp;
3655 unsigned int ioack;
3656 unsigned char misr;
3657
3658 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3659
3660 ioack = inb(ioaddr + EREG_MDACK);
3661 if (((ioack & panelp->ackmask) != 0) ||
3662 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3663 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3664 return;
3665 }
3666 portp = panelp->ports[(ioack >> 3)];
3667
3668 outb((MISR + portp->uartaddr), ioaddr);
3669 misr = inb(ioaddr + EREG_DATA);
3670 if (misr & MISR_DCD) {
3671 stl_cd_change(portp);
3672 portp->stats.modem++;
3673 }
3674
3675 outb((EOSRR + portp->uartaddr), ioaddr);
3676 outb(0, (ioaddr + EREG_DATA));
3677 }
3678
3679 /*****************************************************************************/
3680 /* SC26198 HARDWARE FUNCTIONS */
3681 /*****************************************************************************/
3682
3683 /*
3684 * These functions get/set/update the registers of the sc26198 UARTs.
3685 * Access to the sc26198 registers is via an address/data io port pair.
3686 * (Maybe should make this inline...)
3687 */
3688
3689 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3690 {
3691 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3692 return inb(portp->ioaddr + XP_DATA);
3693 }
3694
3695 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3696 {
3697 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3698 outb(value, (portp->ioaddr + XP_DATA));
3699 }
3700
3701 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3702 {
3703 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3704 if (inb(portp->ioaddr + XP_DATA) != value) {
3705 outb(value, (portp->ioaddr + XP_DATA));
3706 return 1;
3707 }
3708 return 0;
3709 }
3710
3711 /*****************************************************************************/
3712
3713 /*
3714 * Functions to get and set the sc26198 global registers.
3715 */
3716
3717 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3718 {
3719 outb(regnr, (portp->ioaddr + XP_ADDR));
3720 return inb(portp->ioaddr + XP_DATA);
3721 }
3722
3723 #if 0
3724 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3725 {
3726 outb(regnr, (portp->ioaddr + XP_ADDR));
3727 outb(value, (portp->ioaddr + XP_DATA));
3728 }
3729 #endif
3730
3731 /*****************************************************************************/
3732
3733 /*
3734 * Inbitialize the UARTs in a panel. We don't care what sort of board
3735 * these ports are on - since the port io registers are almost
3736 * identical when dealing with ports.
3737 */
3738
3739 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3740 {
3741 int chipmask, i;
3742 int nrchips, ioaddr;
3743
3744 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3745
3746 BRDENABLE(panelp->brdnr, panelp->pagenr);
3747
3748 /*
3749 * Check that each chip is present and started up OK.
3750 */
3751 chipmask = 0;
3752 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3753 if (brdp->brdtype == BRD_ECHPCI)
3754 outb(panelp->pagenr, brdp->ioctrl);
3755
3756 for (i = 0; i < nrchips; i++) {
3757 ioaddr = panelp->iobase + (i * 4);
3758 outb(SCCR, (ioaddr + XP_ADDR));
3759 outb(CR_RESETALL, (ioaddr + XP_DATA));
3760 outb(TSTR, (ioaddr + XP_ADDR));
3761 if (inb(ioaddr + XP_DATA) != 0) {
3762 printk("STALLION: sc26198 not responding, "
3763 "brd=%d panel=%d chip=%d\n",
3764 panelp->brdnr, panelp->panelnr, i);
3765 continue;
3766 }
3767 chipmask |= (0x1 << i);
3768 outb(GCCR, (ioaddr + XP_ADDR));
3769 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3770 outb(WDTRCR, (ioaddr + XP_ADDR));
3771 outb(0xff, (ioaddr + XP_DATA));
3772 }
3773
3774 BRDDISABLE(panelp->brdnr);
3775 return chipmask;
3776 }
3777
3778 /*****************************************************************************/
3779
3780 /*
3781 * Initialize hardware specific port registers.
3782 */
3783
3784 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3785 {
3786 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3787 panelp, portp);
3788
3789 if ((brdp == NULL) || (panelp == NULL) ||
3790 (portp == NULL))
3791 return;
3792
3793 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3794 portp->uartaddr = (portp->portnr & 0x07) << 4;
3795 portp->pagenr = panelp->pagenr;
3796 portp->hwid = 0x1;
3797
3798 BRDENABLE(portp->brdnr, portp->pagenr);
3799 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3800 BRDDISABLE(portp->brdnr);
3801 }
3802
3803 /*****************************************************************************/
3804
3805 /*
3806 * Set up the sc26198 registers for a port based on the termios port
3807 * settings.
3808 */
3809
3810 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3811 {
3812 struct stlbrd *brdp;
3813 unsigned long flags;
3814 unsigned int baudrate;
3815 unsigned char mr0, mr1, mr2, clk;
3816 unsigned char imron, imroff, iopr, ipr;
3817
3818 mr0 = 0;
3819 mr1 = 0;
3820 mr2 = 0;
3821 clk = 0;
3822 iopr = 0;
3823 imron = 0;
3824 imroff = 0;
3825
3826 brdp = stl_brds[portp->brdnr];
3827 if (brdp == NULL)
3828 return;
3829
3830 /*
3831 * Set up the RX char ignore mask with those RX error types we
3832 * can ignore.
3833 */
3834 portp->rxignoremsk = 0;
3835 if (tiosp->c_iflag & IGNPAR)
3836 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3837 SR_RXOVERRUN);
3838 if (tiosp->c_iflag & IGNBRK)
3839 portp->rxignoremsk |= SR_RXBREAK;
3840
3841 portp->rxmarkmsk = SR_RXOVERRUN;
3842 if (tiosp->c_iflag & (INPCK | PARMRK))
3843 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3844 if (tiosp->c_iflag & BRKINT)
3845 portp->rxmarkmsk |= SR_RXBREAK;
3846
3847 /*
3848 * Go through the char size, parity and stop bits and set all the
3849 * option register appropriately.
3850 */
3851 switch (tiosp->c_cflag & CSIZE) {
3852 case CS5:
3853 mr1 |= MR1_CS5;
3854 break;
3855 case CS6:
3856 mr1 |= MR1_CS6;
3857 break;
3858 case CS7:
3859 mr1 |= MR1_CS7;
3860 break;
3861 default:
3862 mr1 |= MR1_CS8;
3863 break;
3864 }
3865
3866 if (tiosp->c_cflag & CSTOPB)
3867 mr2 |= MR2_STOP2;
3868 else
3869 mr2 |= MR2_STOP1;
3870
3871 if (tiosp->c_cflag & PARENB) {
3872 if (tiosp->c_cflag & PARODD)
3873 mr1 |= (MR1_PARENB | MR1_PARODD);
3874 else
3875 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3876 } else
3877 mr1 |= MR1_PARNONE;
3878
3879 mr1 |= MR1_ERRBLOCK;
3880
3881 /*
3882 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3883 * space for hardware flow control and the like. This should be set to
3884 * VMIN.
3885 */
3886 mr2 |= MR2_RXFIFOHALF;
3887
3888 /*
3889 * Calculate the baud rate timers. For now we will just assume that
3890 * the input and output baud are the same. The sc26198 has a fixed
3891 * baud rate table, so only discrete baud rates possible.
3892 */
3893 baudrate = tiosp->c_cflag & CBAUD;
3894 if (baudrate & CBAUDEX) {
3895 baudrate &= ~CBAUDEX;
3896 if ((baudrate < 1) || (baudrate > 4))
3897 tiosp->c_cflag &= ~CBAUDEX;
3898 else
3899 baudrate += 15;
3900 }
3901 baudrate = stl_baudrates[baudrate];
3902 if ((tiosp->c_cflag & CBAUD) == B38400) {
3903 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3904 baudrate = 57600;
3905 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3906 baudrate = 115200;
3907 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3908 baudrate = 230400;
3909 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3910 baudrate = 460800;
3911 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3912 baudrate = (portp->baud_base / portp->custom_divisor);
3913 }
3914 if (baudrate > STL_SC26198MAXBAUD)
3915 baudrate = STL_SC26198MAXBAUD;
3916
3917 if (baudrate > 0)
3918 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3919 if (baudrate <= sc26198_baudtable[clk])
3920 break;
3921
3922 /*
3923 * Check what form of modem signaling is required and set it up.
3924 */
3925 if (tiosp->c_cflag & CLOCAL) {
3926 portp->port.flags &= ~ASYNC_CHECK_CD;
3927 } else {
3928 iopr |= IOPR_DCDCOS;
3929 imron |= IR_IOPORT;
3930 portp->port.flags |= ASYNC_CHECK_CD;
3931 }
3932
3933 /*
3934 * Setup sc26198 enhanced modes if we can. In particular we want to
3935 * handle as much of the flow control as possible automatically. As
3936 * well as saving a few CPU cycles it will also greatly improve flow
3937 * control reliability.
3938 */
3939 if (tiosp->c_iflag & IXON) {
3940 mr0 |= MR0_SWFTX | MR0_SWFT;
3941 imron |= IR_XONXOFF;
3942 } else
3943 imroff |= IR_XONXOFF;
3944
3945 if (tiosp->c_iflag & IXOFF)
3946 mr0 |= MR0_SWFRX;
3947
3948 if (tiosp->c_cflag & CRTSCTS) {
3949 mr2 |= MR2_AUTOCTS;
3950 mr1 |= MR1_AUTORTS;
3951 }
3952
3953 /*
3954 * All sc26198 register values calculated so go through and set
3955 * them all up.
3956 */
3957
3958 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3959 portp->portnr, portp->panelnr, portp->brdnr);
3960 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3961 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3962 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3963 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3964 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3965
3966 spin_lock_irqsave(&brd_lock, flags);
3967 BRDENABLE(portp->brdnr, portp->pagenr);
3968 stl_sc26198setreg(portp, IMR, 0);
3969 stl_sc26198updatereg(portp, MR0, mr0);
3970 stl_sc26198updatereg(portp, MR1, mr1);
3971 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3972 stl_sc26198updatereg(portp, MR2, mr2);
3973 stl_sc26198updatereg(portp, IOPIOR,
3974 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3975
3976 if (baudrate > 0) {
3977 stl_sc26198setreg(portp, TXCSR, clk);
3978 stl_sc26198setreg(portp, RXCSR, clk);
3979 }
3980
3981 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3982 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3983
3984 ipr = stl_sc26198getreg(portp, IPR);
3985 if (ipr & IPR_DCD)
3986 portp->sigs &= ~TIOCM_CD;
3987 else
3988 portp->sigs |= TIOCM_CD;
3989
3990 portp->imr = (portp->imr & ~imroff) | imron;
3991 stl_sc26198setreg(portp, IMR, portp->imr);
3992 BRDDISABLE(portp->brdnr);
3993 spin_unlock_irqrestore(&brd_lock, flags);
3994 }
3995
3996 /*****************************************************************************/
3997
3998 /*
3999 * Set the state of the DTR and RTS signals.
4000 */
4001
4002 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4003 {
4004 unsigned char iopioron, iopioroff;
4005 unsigned long flags;
4006
4007 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4008 dtr, rts);
4009
4010 iopioron = 0;
4011 iopioroff = 0;
4012 if (dtr == 0)
4013 iopioroff |= IPR_DTR;
4014 else if (dtr > 0)
4015 iopioron |= IPR_DTR;
4016 if (rts == 0)
4017 iopioroff |= IPR_RTS;
4018 else if (rts > 0)
4019 iopioron |= IPR_RTS;
4020
4021 spin_lock_irqsave(&brd_lock, flags);
4022 BRDENABLE(portp->brdnr, portp->pagenr);
4023 stl_sc26198setreg(portp, IOPIOR,
4024 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4025 BRDDISABLE(portp->brdnr);
4026 spin_unlock_irqrestore(&brd_lock, flags);
4027 }
4028
4029 /*****************************************************************************/
4030
4031 /*
4032 * Return the state of the signals.
4033 */
4034
4035 static int stl_sc26198getsignals(struct stlport *portp)
4036 {
4037 unsigned char ipr;
4038 unsigned long flags;
4039 int sigs;
4040
4041 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4042
4043 spin_lock_irqsave(&brd_lock, flags);
4044 BRDENABLE(portp->brdnr, portp->pagenr);
4045 ipr = stl_sc26198getreg(portp, IPR);
4046 BRDDISABLE(portp->brdnr);
4047 spin_unlock_irqrestore(&brd_lock, flags);
4048
4049 sigs = 0;
4050 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4051 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4052 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4053 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4054 sigs |= TIOCM_DSR;
4055 return sigs;
4056 }
4057
4058 /*****************************************************************************/
4059
4060 /*
4061 * Enable/Disable the Transmitter and/or Receiver.
4062 */
4063
4064 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4065 {
4066 unsigned char ccr;
4067 unsigned long flags;
4068
4069 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4070
4071 ccr = portp->crenable;
4072 if (tx == 0)
4073 ccr &= ~CR_TXENABLE;
4074 else if (tx > 0)
4075 ccr |= CR_TXENABLE;
4076 if (rx == 0)
4077 ccr &= ~CR_RXENABLE;
4078 else if (rx > 0)
4079 ccr |= CR_RXENABLE;
4080
4081 spin_lock_irqsave(&brd_lock, flags);
4082 BRDENABLE(portp->brdnr, portp->pagenr);
4083 stl_sc26198setreg(portp, SCCR, ccr);
4084 BRDDISABLE(portp->brdnr);
4085 portp->crenable = ccr;
4086 spin_unlock_irqrestore(&brd_lock, flags);
4087 }
4088
4089 /*****************************************************************************/
4090
4091 /*
4092 * Start/stop the Transmitter and/or Receiver.
4093 */
4094
4095 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4096 {
4097 unsigned char imr;
4098 unsigned long flags;
4099
4100 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4101
4102 imr = portp->imr;
4103 if (tx == 0)
4104 imr &= ~IR_TXRDY;
4105 else if (tx == 1)
4106 imr |= IR_TXRDY;
4107 if (rx == 0)
4108 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4109 else if (rx > 0)
4110 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4111
4112 spin_lock_irqsave(&brd_lock, flags);
4113 BRDENABLE(portp->brdnr, portp->pagenr);
4114 stl_sc26198setreg(portp, IMR, imr);
4115 BRDDISABLE(portp->brdnr);
4116 portp->imr = imr;
4117 if (tx > 0)
4118 set_bit(ASYI_TXBUSY, &portp->istate);
4119 spin_unlock_irqrestore(&brd_lock, flags);
4120 }
4121
4122 /*****************************************************************************/
4123
4124 /*
4125 * Disable all interrupts from this port.
4126 */
4127
4128 static void stl_sc26198disableintrs(struct stlport *portp)
4129 {
4130 unsigned long flags;
4131
4132 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4133
4134 spin_lock_irqsave(&brd_lock, flags);
4135 BRDENABLE(portp->brdnr, portp->pagenr);
4136 portp->imr = 0;
4137 stl_sc26198setreg(portp, IMR, 0);
4138 BRDDISABLE(portp->brdnr);
4139 spin_unlock_irqrestore(&brd_lock, flags);
4140 }
4141
4142 /*****************************************************************************/
4143
4144 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4145 {
4146 unsigned long flags;
4147
4148 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4149
4150 spin_lock_irqsave(&brd_lock, flags);
4151 BRDENABLE(portp->brdnr, portp->pagenr);
4152 if (len == 1) {
4153 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4154 portp->stats.txbreaks++;
4155 } else
4156 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4157
4158 BRDDISABLE(portp->brdnr);
4159 spin_unlock_irqrestore(&brd_lock, flags);
4160 }
4161
4162 /*****************************************************************************/
4163
4164 /*
4165 * Take flow control actions...
4166 */
4167
4168 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4169 {
4170 struct tty_struct *tty;
4171 unsigned long flags;
4172 unsigned char mr0;
4173
4174 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4175
4176 if (portp == NULL)
4177 return;
4178 tty = portp->port.tty;
4179 if (tty == NULL)
4180 return;
4181
4182 spin_lock_irqsave(&brd_lock, flags);
4183 BRDENABLE(portp->brdnr, portp->pagenr);
4184
4185 if (state) {
4186 if (tty->termios->c_iflag & IXOFF) {
4187 mr0 = stl_sc26198getreg(portp, MR0);
4188 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4189 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4190 mr0 |= MR0_SWFRX;
4191 portp->stats.rxxon++;
4192 stl_sc26198wait(portp);
4193 stl_sc26198setreg(portp, MR0, mr0);
4194 }
4195 /*
4196 * Question: should we return RTS to what it was before? It may
4197 * have been set by an ioctl... Suppose not, since if you have
4198 * hardware flow control set then it is pretty silly to go and
4199 * set the RTS line by hand.
4200 */
4201 if (tty->termios->c_cflag & CRTSCTS) {
4202 stl_sc26198setreg(portp, MR1,
4203 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4204 stl_sc26198setreg(portp, IOPIOR,
4205 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4206 portp->stats.rxrtson++;
4207 }
4208 } else {
4209 if (tty->termios->c_iflag & IXOFF) {
4210 mr0 = stl_sc26198getreg(portp, MR0);
4211 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4212 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4213 mr0 &= ~MR0_SWFRX;
4214 portp->stats.rxxoff++;
4215 stl_sc26198wait(portp);
4216 stl_sc26198setreg(portp, MR0, mr0);
4217 }
4218 if (tty->termios->c_cflag & CRTSCTS) {
4219 stl_sc26198setreg(portp, MR1,
4220 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4221 stl_sc26198setreg(portp, IOPIOR,
4222 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4223 portp->stats.rxrtsoff++;
4224 }
4225 }
4226
4227 BRDDISABLE(portp->brdnr);
4228 spin_unlock_irqrestore(&brd_lock, flags);
4229 }
4230
4231 /*****************************************************************************/
4232
4233 /*
4234 * Send a flow control character.
4235 */
4236
4237 static void stl_sc26198sendflow(struct stlport *portp, int state)
4238 {
4239 struct tty_struct *tty;
4240 unsigned long flags;
4241 unsigned char mr0;
4242
4243 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4244
4245 if (portp == NULL)
4246 return;
4247 tty = portp->port.tty;
4248 if (tty == NULL)
4249 return;
4250
4251 spin_lock_irqsave(&brd_lock, flags);
4252 BRDENABLE(portp->brdnr, portp->pagenr);
4253 if (state) {
4254 mr0 = stl_sc26198getreg(portp, MR0);
4255 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4256 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4257 mr0 |= MR0_SWFRX;
4258 portp->stats.rxxon++;
4259 stl_sc26198wait(portp);
4260 stl_sc26198setreg(portp, MR0, mr0);
4261 } else {
4262 mr0 = stl_sc26198getreg(portp, MR0);
4263 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4264 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4265 mr0 &= ~MR0_SWFRX;
4266 portp->stats.rxxoff++;
4267 stl_sc26198wait(portp);
4268 stl_sc26198setreg(portp, MR0, mr0);
4269 }
4270 BRDDISABLE(portp->brdnr);
4271 spin_unlock_irqrestore(&brd_lock, flags);
4272 }
4273
4274 /*****************************************************************************/
4275
4276 static void stl_sc26198flush(struct stlport *portp)
4277 {
4278 unsigned long flags;
4279
4280 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4281
4282 if (portp == NULL)
4283 return;
4284
4285 spin_lock_irqsave(&brd_lock, flags);
4286 BRDENABLE(portp->brdnr, portp->pagenr);
4287 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4288 stl_sc26198setreg(portp, SCCR, portp->crenable);
4289 BRDDISABLE(portp->brdnr);
4290 portp->tx.tail = portp->tx.head;
4291 spin_unlock_irqrestore(&brd_lock, flags);
4292 }
4293
4294 /*****************************************************************************/
4295
4296 /*
4297 * Return the current state of data flow on this port. This is only
4298 * really interresting when determining if data has fully completed
4299 * transmission or not... The sc26198 interrupt scheme cannot
4300 * determine when all data has actually drained, so we need to
4301 * check the port statusy register to be sure.
4302 */
4303
4304 static int stl_sc26198datastate(struct stlport *portp)
4305 {
4306 unsigned long flags;
4307 unsigned char sr;
4308
4309 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4310
4311 if (portp == NULL)
4312 return 0;
4313 if (test_bit(ASYI_TXBUSY, &portp->istate))
4314 return 1;
4315
4316 spin_lock_irqsave(&brd_lock, flags);
4317 BRDENABLE(portp->brdnr, portp->pagenr);
4318 sr = stl_sc26198getreg(portp, SR);
4319 BRDDISABLE(portp->brdnr);
4320 spin_unlock_irqrestore(&brd_lock, flags);
4321
4322 return (sr & SR_TXEMPTY) ? 0 : 1;
4323 }
4324
4325 /*****************************************************************************/
4326
4327 /*
4328 * Delay for a small amount of time, to give the sc26198 a chance
4329 * to process a command...
4330 */
4331
4332 static void stl_sc26198wait(struct stlport *portp)
4333 {
4334 int i;
4335
4336 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4337
4338 if (portp == NULL)
4339 return;
4340
4341 for (i = 0; i < 20; i++)
4342 stl_sc26198getglobreg(portp, TSTR);
4343 }
4344
4345 /*****************************************************************************/
4346
4347 /*
4348 * If we are TX flow controlled and in IXANY mode then we may
4349 * need to unflow control here. We gotta do this because of the
4350 * automatic flow control modes of the sc26198.
4351 */
4352
4353 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4354 {
4355 unsigned char mr0;
4356
4357 mr0 = stl_sc26198getreg(portp, MR0);
4358 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4359 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4360 stl_sc26198wait(portp);
4361 stl_sc26198setreg(portp, MR0, mr0);
4362 clear_bit(ASYI_TXFLOWED, &portp->istate);
4363 }
4364
4365 /*****************************************************************************/
4366
4367 /*
4368 * Interrupt service routine for sc26198 panels.
4369 */
4370
4371 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4372 {
4373 struct stlport *portp;
4374 unsigned int iack;
4375
4376 spin_lock(&brd_lock);
4377
4378 /*
4379 * Work around bug in sc26198 chip... Cannot have A6 address
4380 * line of UART high, else iack will be returned as 0.
4381 */
4382 outb(0, (iobase + 1));
4383
4384 iack = inb(iobase + XP_IACK);
4385 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4386
4387 if (iack & IVR_RXDATA)
4388 stl_sc26198rxisr(portp, iack);
4389 else if (iack & IVR_TXDATA)
4390 stl_sc26198txisr(portp);
4391 else
4392 stl_sc26198otherisr(portp, iack);
4393
4394 spin_unlock(&brd_lock);
4395 }
4396
4397 /*****************************************************************************/
4398
4399 /*
4400 * Transmit interrupt handler. This has gotta be fast! Handling TX
4401 * chars is pretty simple, stuff as many as possible from the TX buffer
4402 * into the sc26198 FIFO.
4403 * In practice it is possible that interrupts are enabled but that the
4404 * port has been hung up. Need to handle not having any TX buffer here,
4405 * this is done by using the side effect that head and tail will also
4406 * be NULL if the buffer has been freed.
4407 */
4408
4409 static void stl_sc26198txisr(struct stlport *portp)
4410 {
4411 unsigned int ioaddr;
4412 unsigned char mr0;
4413 int len, stlen;
4414 char *head, *tail;
4415
4416 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4417
4418 ioaddr = portp->ioaddr;
4419 head = portp->tx.head;
4420 tail = portp->tx.tail;
4421 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4422 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4423 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4424 set_bit(ASYI_TXLOW, &portp->istate);
4425 if (portp->port.tty)
4426 tty_wakeup(portp->port.tty);
4427 }
4428
4429 if (len == 0) {
4430 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4431 mr0 = inb(ioaddr + XP_DATA);
4432 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4433 portp->imr &= ~IR_TXRDY;
4434 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4435 outb(portp->imr, (ioaddr + XP_DATA));
4436 clear_bit(ASYI_TXBUSY, &portp->istate);
4437 } else {
4438 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4439 outb(mr0, (ioaddr + XP_DATA));
4440 }
4441 } else {
4442 len = min(len, SC26198_TXFIFOSIZE);
4443 portp->stats.txtotal += len;
4444 stlen = min_t(unsigned int, len,
4445 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4446 outb(GTXFIFO, (ioaddr + XP_ADDR));
4447 outsb((ioaddr + XP_DATA), tail, stlen);
4448 len -= stlen;
4449 tail += stlen;
4450 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4451 tail = portp->tx.buf;
4452 if (len > 0) {
4453 outsb((ioaddr + XP_DATA), tail, len);
4454 tail += len;
4455 }
4456 portp->tx.tail = tail;
4457 }
4458 }
4459
4460 /*****************************************************************************/
4461
4462 /*
4463 * Receive character interrupt handler. Determine if we have good chars
4464 * or bad chars and then process appropriately. Good chars are easy
4465 * just shove the lot into the RX buffer and set all status byte to 0.
4466 * If a bad RX char then process as required. This routine needs to be
4467 * fast! In practice it is possible that we get an interrupt on a port
4468 * that is closed. This can happen on hangups - since they completely
4469 * shutdown a port not in user context. Need to handle this case.
4470 */
4471
4472 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4473 {
4474 struct tty_struct *tty;
4475 unsigned int len, buflen, ioaddr;
4476
4477 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4478
4479 tty = portp->port.tty;
4480 ioaddr = portp->ioaddr;
4481 outb(GIBCR, (ioaddr + XP_ADDR));
4482 len = inb(ioaddr + XP_DATA) + 1;
4483
4484 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4485 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4486 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4487 outb(GRXFIFO, (ioaddr + XP_ADDR));
4488 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4489 portp->stats.rxlost += len;
4490 portp->stats.rxtotal += len;
4491 } else {
4492 len = min(len, buflen);
4493 if (len > 0) {
4494 unsigned char *ptr;
4495 outb(GRXFIFO, (ioaddr + XP_ADDR));
4496 tty_prepare_flip_string(tty, &ptr, len);
4497 insb((ioaddr + XP_DATA), ptr, len);
4498 tty_schedule_flip(tty);
4499 portp->stats.rxtotal += len;
4500 }
4501 }
4502 } else {
4503 stl_sc26198rxbadchars(portp);
4504 }
4505
4506 /*
4507 * If we are TX flow controlled and in IXANY mode then we may need
4508 * to unflow control here. We gotta do this because of the automatic
4509 * flow control modes of the sc26198.
4510 */
4511 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4512 if ((tty != NULL) &&
4513 (tty->termios != NULL) &&
4514 (tty->termios->c_iflag & IXANY)) {
4515 stl_sc26198txunflow(portp, tty);
4516 }
4517 }
4518 }
4519
4520 /*****************************************************************************/
4521
4522 /*
4523 * Process an RX bad character.
4524 */
4525
4526 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4527 {
4528 struct tty_struct *tty;
4529 unsigned int ioaddr;
4530
4531 tty = portp->port.tty;
4532 ioaddr = portp->ioaddr;
4533
4534 if (status & SR_RXPARITY)
4535 portp->stats.rxparity++;
4536 if (status & SR_RXFRAMING)
4537 portp->stats.rxframing++;
4538 if (status & SR_RXOVERRUN)
4539 portp->stats.rxoverrun++;
4540 if (status & SR_RXBREAK)
4541 portp->stats.rxbreaks++;
4542
4543 if ((tty != NULL) &&
4544 ((portp->rxignoremsk & status) == 0)) {
4545 if (portp->rxmarkmsk & status) {
4546 if (status & SR_RXBREAK) {
4547 status = TTY_BREAK;
4548 if (portp->port.flags & ASYNC_SAK) {
4549 do_SAK(tty);
4550 BRDENABLE(portp->brdnr, portp->pagenr);
4551 }
4552 } else if (status & SR_RXPARITY)
4553 status = TTY_PARITY;
4554 else if (status & SR_RXFRAMING)
4555 status = TTY_FRAME;
4556 else if(status & SR_RXOVERRUN)
4557 status = TTY_OVERRUN;
4558 else
4559 status = 0;
4560 } else
4561 status = 0;
4562
4563 tty_insert_flip_char(tty, ch, status);
4564 tty_schedule_flip(tty);
4565
4566 if (status == 0)
4567 portp->stats.rxtotal++;
4568 }
4569 }
4570
4571 /*****************************************************************************/
4572
4573 /*
4574 * Process all characters in the RX FIFO of the UART. Check all char
4575 * status bytes as well, and process as required. We need to check
4576 * all bytes in the FIFO, in case some more enter the FIFO while we
4577 * are here. To get the exact character error type we need to switch
4578 * into CHAR error mode (that is why we need to make sure we empty
4579 * the FIFO).
4580 */
4581
4582 static void stl_sc26198rxbadchars(struct stlport *portp)
4583 {
4584 unsigned char status, mr1;
4585 char ch;
4586
4587 /*
4588 * To get the precise error type for each character we must switch
4589 * back into CHAR error mode.
4590 */
4591 mr1 = stl_sc26198getreg(portp, MR1);
4592 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4593
4594 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4595 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4596 ch = stl_sc26198getreg(portp, RXFIFO);
4597 stl_sc26198rxbadch(portp, status, ch);
4598 }
4599
4600 /*
4601 * To get correct interrupt class we must switch back into BLOCK
4602 * error mode.
4603 */
4604 stl_sc26198setreg(portp, MR1, mr1);
4605 }
4606
4607 /*****************************************************************************/
4608
4609 /*
4610 * Other interrupt handler. This includes modem signals, flow
4611 * control actions, etc. Most stuff is left to off-level interrupt
4612 * processing time.
4613 */
4614
4615 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4616 {
4617 unsigned char cir, ipr, xisr;
4618
4619 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4620
4621 cir = stl_sc26198getglobreg(portp, CIR);
4622
4623 switch (cir & CIR_SUBTYPEMASK) {
4624 case CIR_SUBCOS:
4625 ipr = stl_sc26198getreg(portp, IPR);
4626 if (ipr & IPR_DCDCHANGE) {
4627 stl_cd_change(portp);
4628 portp->stats.modem++;
4629 }
4630 break;
4631 case CIR_SUBXONXOFF:
4632 xisr = stl_sc26198getreg(portp, XISR);
4633 if (xisr & XISR_RXXONGOT) {
4634 set_bit(ASYI_TXFLOWED, &portp->istate);
4635 portp->stats.txxoff++;
4636 }
4637 if (xisr & XISR_RXXOFFGOT) {
4638 clear_bit(ASYI_TXFLOWED, &portp->istate);
4639 portp->stats.txxon++;
4640 }
4641 break;
4642 case CIR_SUBBREAK:
4643 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4644 stl_sc26198rxbadchars(portp);
4645 break;
4646 default:
4647 break;
4648 }
4649 }
4650
4651 static void stl_free_isabrds(void)
4652 {
4653 struct stlbrd *brdp;
4654 unsigned int i;
4655
4656 for (i = 0; i < stl_nrbrds; i++) {
4657 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4658 continue;
4659
4660 free_irq(brdp->irq, brdp);
4661
4662 stl_cleanup_panels(brdp);
4663
4664 release_region(brdp->ioaddr1, brdp->iosize1);
4665 if (brdp->iosize2 > 0)
4666 release_region(brdp->ioaddr2, brdp->iosize2);
4667
4668 kfree(brdp);
4669 stl_brds[i] = NULL;
4670 }
4671 }
4672
4673 /*
4674 * Loadable module initialization stuff.
4675 */
4676 static int __init stallion_module_init(void)
4677 {
4678 struct stlbrd *brdp;
4679 struct stlconf conf;
4680 unsigned int i, j;
4681 int retval;
4682
4683 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4684
4685 spin_lock_init(&stallion_lock);
4686 spin_lock_init(&brd_lock);
4687
4688 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4689 if (!stl_serial) {
4690 retval = -ENOMEM;
4691 goto err;
4692 }
4693
4694 stl_serial->owner = THIS_MODULE;
4695 stl_serial->driver_name = stl_drvname;
4696 stl_serial->name = "ttyE";
4697 stl_serial->major = STL_SERIALMAJOR;
4698 stl_serial->minor_start = 0;
4699 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4700 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4701 stl_serial->init_termios = stl_deftermios;
4702 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4703 tty_set_operations(stl_serial, &stl_ops);
4704
4705 retval = tty_register_driver(stl_serial);
4706 if (retval) {
4707 printk("STALLION: failed to register serial driver\n");
4708 goto err_frtty;
4709 }
4710
4711 /*
4712 * Find any dynamically supported boards. That is via module load
4713 * line options.
4714 */
4715 for (i = stl_nrbrds; i < stl_nargs; i++) {
4716 memset(&conf, 0, sizeof(conf));
4717 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4718 continue;
4719 if ((brdp = stl_allocbrd()) == NULL)
4720 continue;
4721 brdp->brdnr = i;
4722 brdp->brdtype = conf.brdtype;
4723 brdp->ioaddr1 = conf.ioaddr1;
4724 brdp->ioaddr2 = conf.ioaddr2;
4725 brdp->irq = conf.irq;
4726 brdp->irqtype = conf.irqtype;
4727 stl_brds[brdp->brdnr] = brdp;
4728 if (stl_brdinit(brdp)) {
4729 stl_brds[brdp->brdnr] = NULL;
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_nrbrds = i + 1;
4736 }
4737 }
4738
4739 /* this has to be _after_ isa finding because of locking */
4740 retval = pci_register_driver(&stl_pcidriver);
4741 if (retval && stl_nrbrds == 0) {
4742 printk(KERN_ERR "STALLION: can't register pci driver\n");
4743 goto err_unrtty;
4744 }
4745
4746 /*
4747 * Set up a character driver for per board stuff. This is mainly used
4748 * to do stats ioctls on the ports.
4749 */
4750 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4751 printk("STALLION: failed to register serial board device\n");
4752
4753 stallion_class = class_create(THIS_MODULE, "staliomem");
4754 if (IS_ERR(stallion_class))
4755 printk("STALLION: failed to create class\n");
4756 for (i = 0; i < 4; i++)
4757 device_create_drvdata(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4758 NULL, "staliomem%d", i);
4759
4760 return 0;
4761 err_unrtty:
4762 tty_unregister_driver(stl_serial);
4763 err_frtty:
4764 put_tty_driver(stl_serial);
4765 err:
4766 return retval;
4767 }
4768
4769 static void __exit stallion_module_exit(void)
4770 {
4771 struct stlbrd *brdp;
4772 unsigned int i, j;
4773
4774 pr_debug("cleanup_module()\n");
4775
4776 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4777 stl_drvversion);
4778
4779 /*
4780 * Free up all allocated resources used by the ports. This includes
4781 * memory and interrupts. As part of this process we will also do
4782 * a hangup on every open port - to try to flush out any processes
4783 * hanging onto ports.
4784 */
4785 for (i = 0; i < stl_nrbrds; i++) {
4786 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4787 continue;
4788 for (j = 0; j < brdp->nrports; j++)
4789 tty_unregister_device(stl_serial,
4790 brdp->brdnr * STL_MAXPORTS + j);
4791 }
4792
4793 for (i = 0; i < 4; i++)
4794 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4795 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4796 class_destroy(stallion_class);
4797
4798 pci_unregister_driver(&stl_pcidriver);
4799
4800 stl_free_isabrds();
4801
4802 tty_unregister_driver(stl_serial);
4803 put_tty_driver(stl_serial);
4804 }
4805
4806 module_init(stallion_module_init);
4807 module_exit(stallion_module_exit);
4808
4809 MODULE_AUTHOR("Greg Ungerer");
4810 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4811 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards