Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/drivers/char/stallion.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 135393 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /*****************************************************************************/ |
2 | |
3 | /* |
4 | * stallion.c -- stallion multiport serial driver. |
5 | * |
6 | * Copyright (C) 1996-1999 Stallion Technologies |
7 | * Copyright (C) 1994-1996 Greg Ungerer. |
8 | * |
9 | * This code is loosely based on the Linux serial driver, written by |
10 | * Linus Torvalds, Theodore T'so and others. |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU General Public License as published by |
14 | * the Free Software Foundation; either version 2 of the License, or |
15 | * (at your option) any later version. |
16 | * |
17 | * This program is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU General Public License for more details. |
21 | * |
22 | * You should have received a copy of the GNU General Public License |
23 | * along with this program; if not, write to the Free Software |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
25 | */ |
26 | |
27 | /*****************************************************************************/ |
28 | |
29 | #include <linux/config.h> |
30 | #include <linux/module.h> |
31 | #include <linux/slab.h> |
32 | #include <linux/interrupt.h> |
33 | #include <linux/tty.h> |
34 | #include <linux/tty_flip.h> |
35 | #include <linux/serial.h> |
36 | #include <linux/cd1400.h> |
37 | #include <linux/sc26198.h> |
38 | #include <linux/comstats.h> |
39 | #include <linux/stallion.h> |
40 | #include <linux/ioport.h> |
41 | #include <linux/init.h> |
42 | #include <linux/smp_lock.h> |
43 | #include <linux/devfs_fs_kernel.h> |
44 | #include <linux/device.h> |
45 | #include <linux/delay.h> |
46 | |
47 | #include <asm/io.h> |
48 | #include <asm/uaccess.h> |
49 | |
50 | #ifdef CONFIG_PCI |
51 | #include <linux/pci.h> |
52 | #endif |
53 | |
54 | /*****************************************************************************/ |
55 | |
56 | /* |
57 | * Define different board types. Use the standard Stallion "assigned" |
58 | * board numbers. Boards supported in this driver are abbreviated as |
59 | * EIO = EasyIO and ECH = EasyConnection 8/32. |
60 | */ |
61 | #define BRD_EASYIO 20 |
62 | #define BRD_ECH 21 |
63 | #define BRD_ECHMC 22 |
64 | #define BRD_ECHPCI 26 |
65 | #define BRD_ECH64PCI 27 |
66 | #define BRD_EASYIOPCI 28 |
67 | |
68 | /* |
69 | * Define a configuration structure to hold the board configuration. |
70 | * Need to set this up in the code (for now) with the boards that are |
71 | * to be configured into the system. This is what needs to be modified |
72 | * when adding/removing/modifying boards. Each line entry in the |
73 | * stl_brdconf[] array is a board. Each line contains io/irq/memory |
74 | * ranges for that board (as well as what type of board it is). |
75 | * Some examples: |
76 | * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, |
77 | * This line would configure an EasyIO board (4 or 8, no difference), |
78 | * at io address 2a0 and irq 10. |
79 | * Another example: |
80 | * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, |
81 | * This line will configure an EasyConnection 8/32 board at primary io |
82 | * address 2a8, secondary io address 280 and irq 12. |
83 | * Enter as many lines into this array as you want (only the first 4 |
84 | * will actually be used!). Any combination of EasyIO and EasyConnection |
85 | * boards can be specified. EasyConnection 8/32 boards can share their |
86 | * secondary io addresses between each other. |
87 | * |
88 | * NOTE: there is no need to put any entries in this table for PCI |
89 | * boards. They will be found automatically by the driver - provided |
90 | * PCI BIOS32 support is compiled into the kernel. |
91 | */ |
92 | |
93 | typedef struct { |
94 | int brdtype; |
95 | int ioaddr1; |
96 | int ioaddr2; |
97 | unsigned long memaddr; |
98 | int irq; |
99 | int irqtype; |
100 | } stlconf_t; |
101 | |
102 | static stlconf_t stl_brdconf[] = { |
103 | /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/ |
104 | }; |
105 | |
106 | static int stl_nrbrds = sizeof(stl_brdconf) / sizeof(stlconf_t); |
107 | |
108 | /*****************************************************************************/ |
109 | |
110 | /* |
111 | * Define some important driver characteristics. Device major numbers |
112 | * allocated as per Linux Device Registry. |
113 | */ |
114 | #ifndef STL_SIOMEMMAJOR |
115 | #define STL_SIOMEMMAJOR 28 |
116 | #endif |
117 | #ifndef STL_SERIALMAJOR |
118 | #define STL_SERIALMAJOR 24 |
119 | #endif |
120 | #ifndef STL_CALLOUTMAJOR |
121 | #define STL_CALLOUTMAJOR 25 |
122 | #endif |
123 | |
124 | /* |
125 | * Set the TX buffer size. Bigger is better, but we don't want |
126 | * to chew too much memory with buffers! |
127 | */ |
128 | #define STL_TXBUFLOW 512 |
129 | #define STL_TXBUFSIZE 4096 |
130 | |
131 | /*****************************************************************************/ |
132 | |
133 | /* |
134 | * Define our local driver identity first. Set up stuff to deal with |
135 | * all the local structures required by a serial tty driver. |
136 | */ |
137 | static char *stl_drvtitle = "Stallion Multiport Serial Driver"; |
138 | static char *stl_drvname = "stallion"; |
139 | static char *stl_drvversion = "5.6.0"; |
140 | |
141 | static struct tty_driver *stl_serial; |
142 | |
143 | /* |
144 | * We will need to allocate a temporary write buffer for chars that |
145 | * come direct from user space. The problem is that a copy from user |
146 | * space might cause a page fault (typically on a system that is |
147 | * swapping!). All ports will share one buffer - since if the system |
148 | * is already swapping a shared buffer won't make things any worse. |
149 | */ |
150 | static char *stl_tmpwritebuf; |
151 | static DECLARE_MUTEX(stl_tmpwritesem); |
152 | |
153 | /* |
154 | * Define a local default termios struct. All ports will be created |
155 | * with this termios initially. Basically all it defines is a raw port |
156 | * at 9600, 8 data bits, 1 stop bit. |
157 | */ |
158 | static struct termios stl_deftermios = { |
159 | .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), |
160 | .c_cc = INIT_C_CC, |
161 | }; |
162 | |
163 | /* |
164 | * Define global stats structures. Not used often, and can be |
165 | * re-used for each stats call. |
166 | */ |
167 | static comstats_t stl_comstats; |
168 | static combrd_t stl_brdstats; |
169 | static stlbrd_t stl_dummybrd; |
170 | static stlport_t stl_dummyport; |
171 | |
172 | /* |
173 | * Define global place to put buffer overflow characters. |
174 | */ |
175 | static char stl_unwanted[SC26198_RXFIFOSIZE]; |
176 | |
177 | /*****************************************************************************/ |
178 | |
179 | static stlbrd_t *stl_brds[STL_MAXBRDS]; |
180 | |
181 | /* |
182 | * Per board state flags. Used with the state field of the board struct. |
183 | * Not really much here! |
184 | */ |
185 | #define BRD_FOUND 0x1 |
186 | |
187 | /* |
188 | * Define the port structure istate flags. These set of flags are |
189 | * modified at interrupt time - so setting and reseting them needs |
190 | * to be atomic. Use the bit clear/setting routines for this. |
191 | */ |
192 | #define ASYI_TXBUSY 1 |
193 | #define ASYI_TXLOW 2 |
194 | #define ASYI_DCDCHANGE 3 |
195 | #define ASYI_TXFLOWED 4 |
196 | |
197 | /* |
198 | * Define an array of board names as printable strings. Handy for |
199 | * referencing boards when printing trace and stuff. |
200 | */ |
201 | static char *stl_brdnames[] = { |
202 | (char *) NULL, |
203 | (char *) NULL, |
204 | (char *) NULL, |
205 | (char *) NULL, |
206 | (char *) NULL, |
207 | (char *) NULL, |
208 | (char *) NULL, |
209 | (char *) NULL, |
210 | (char *) NULL, |
211 | (char *) NULL, |
212 | (char *) NULL, |
213 | (char *) NULL, |
214 | (char *) NULL, |
215 | (char *) NULL, |
216 | (char *) NULL, |
217 | (char *) NULL, |
218 | (char *) NULL, |
219 | (char *) NULL, |
220 | (char *) NULL, |
221 | (char *) NULL, |
222 | "EasyIO", |
223 | "EC8/32-AT", |
224 | "EC8/32-MC", |
225 | (char *) NULL, |
226 | (char *) NULL, |
227 | (char *) NULL, |
228 | "EC8/32-PCI", |
229 | "EC8/64-PCI", |
230 | "EasyIO-PCI", |
231 | }; |
232 | |
233 | /*****************************************************************************/ |
234 | |
235 | /* |
236 | * Define some string labels for arguments passed from the module |
237 | * load line. These allow for easy board definitions, and easy |
238 | * modification of the io, memory and irq resoucres. |
239 | */ |
240 | static int stl_nargs = 0; |
241 | static char *board0[4]; |
242 | static char *board1[4]; |
243 | static char *board2[4]; |
244 | static char *board3[4]; |
245 | |
246 | static char **stl_brdsp[] = { |
247 | (char **) &board0, |
248 | (char **) &board1, |
249 | (char **) &board2, |
250 | (char **) &board3 |
251 | }; |
252 | |
253 | /* |
254 | * Define a set of common board names, and types. This is used to |
255 | * parse any module arguments. |
256 | */ |
257 | |
258 | typedef struct stlbrdtype { |
259 | char *name; |
260 | int type; |
261 | } stlbrdtype_t; |
262 | |
263 | static stlbrdtype_t stl_brdstr[] = { |
264 | { "easyio", BRD_EASYIO }, |
265 | { "eio", BRD_EASYIO }, |
266 | { "20", BRD_EASYIO }, |
267 | { "ec8/32", BRD_ECH }, |
268 | { "ec8/32-at", BRD_ECH }, |
269 | { "ec8/32-isa", BRD_ECH }, |
270 | { "ech", BRD_ECH }, |
271 | { "echat", BRD_ECH }, |
272 | { "21", BRD_ECH }, |
273 | { "ec8/32-mc", BRD_ECHMC }, |
274 | { "ec8/32-mca", BRD_ECHMC }, |
275 | { "echmc", BRD_ECHMC }, |
276 | { "echmca", BRD_ECHMC }, |
277 | { "22", BRD_ECHMC }, |
278 | { "ec8/32-pc", BRD_ECHPCI }, |
279 | { "ec8/32-pci", BRD_ECHPCI }, |
280 | { "26", BRD_ECHPCI }, |
281 | { "ec8/64-pc", BRD_ECH64PCI }, |
282 | { "ec8/64-pci", BRD_ECH64PCI }, |
283 | { "ech-pci", BRD_ECH64PCI }, |
284 | { "echpci", BRD_ECH64PCI }, |
285 | { "echpc", BRD_ECH64PCI }, |
286 | { "27", BRD_ECH64PCI }, |
287 | { "easyio-pc", BRD_EASYIOPCI }, |
288 | { "easyio-pci", BRD_EASYIOPCI }, |
289 | { "eio-pci", BRD_EASYIOPCI }, |
290 | { "eiopci", BRD_EASYIOPCI }, |
291 | { "28", BRD_EASYIOPCI }, |
292 | }; |
293 | |
294 | /* |
295 | * Define the module agruments. |
296 | */ |
297 | MODULE_AUTHOR("Greg Ungerer"); |
298 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); |
299 | MODULE_LICENSE("GPL"); |
300 | |
301 | module_param_array(board0, charp, &stl_nargs, 0); |
302 | MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
303 | module_param_array(board1, charp, &stl_nargs, 0); |
304 | MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
305 | module_param_array(board2, charp, &stl_nargs, 0); |
306 | MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
307 | module_param_array(board3, charp, &stl_nargs, 0); |
308 | MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
309 | |
310 | /*****************************************************************************/ |
311 | |
312 | /* |
313 | * Hardware ID bits for the EasyIO and ECH boards. These defines apply |
314 | * to the directly accessible io ports of these boards (not the uarts - |
315 | * they are in cd1400.h and sc26198.h). |
316 | */ |
317 | #define EIO_8PORTRS 0x04 |
318 | #define EIO_4PORTRS 0x05 |
319 | #define EIO_8PORTDI 0x00 |
320 | #define EIO_8PORTM 0x06 |
321 | #define EIO_MK3 0x03 |
322 | #define EIO_IDBITMASK 0x07 |
323 | |
324 | #define EIO_BRDMASK 0xf0 |
325 | #define ID_BRD4 0x10 |
326 | #define ID_BRD8 0x20 |
327 | #define ID_BRD16 0x30 |
328 | |
329 | #define EIO_INTRPEND 0x08 |
330 | #define EIO_INTEDGE 0x00 |
331 | #define EIO_INTLEVEL 0x08 |
332 | #define EIO_0WS 0x10 |
333 | |
334 | #define ECH_ID 0xa0 |
335 | #define ECH_IDBITMASK 0xe0 |
336 | #define ECH_BRDENABLE 0x08 |
337 | #define ECH_BRDDISABLE 0x00 |
338 | #define ECH_INTENABLE 0x01 |
339 | #define ECH_INTDISABLE 0x00 |
340 | #define ECH_INTLEVEL 0x02 |
341 | #define ECH_INTEDGE 0x00 |
342 | #define ECH_INTRPEND 0x01 |
343 | #define ECH_BRDRESET 0x01 |
344 | |
345 | #define ECHMC_INTENABLE 0x01 |
346 | #define ECHMC_BRDRESET 0x02 |
347 | |
348 | #define ECH_PNLSTATUS 2 |
349 | #define ECH_PNL16PORT 0x20 |
350 | #define ECH_PNLIDMASK 0x07 |
351 | #define ECH_PNLXPID 0x40 |
352 | #define ECH_PNLINTRPEND 0x80 |
353 | |
354 | #define ECH_ADDR2MASK 0x1e0 |
355 | |
356 | /* |
357 | * Define the vector mapping bits for the programmable interrupt board |
358 | * hardware. These bits encode the interrupt for the board to use - it |
359 | * is software selectable (except the EIO-8M). |
360 | */ |
361 | static unsigned char stl_vecmap[] = { |
362 | 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, |
363 | 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 |
364 | }; |
365 | |
366 | /* |
367 | * Set up enable and disable macros for the ECH boards. They require |
368 | * the secondary io address space to be activated and deactivated. |
369 | * This way all ECH boards can share their secondary io region. |
370 | * If this is an ECH-PCI board then also need to set the page pointer |
371 | * to point to the correct page. |
372 | */ |
373 | #define BRDENABLE(brdnr,pagenr) \ |
374 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
375 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ |
376 | stl_brds[(brdnr)]->ioctrl); \ |
377 | else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ |
378 | outb((pagenr), stl_brds[(brdnr)]->ioctrl); |
379 | |
380 | #define BRDDISABLE(brdnr) \ |
381 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
382 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ |
383 | stl_brds[(brdnr)]->ioctrl); |
384 | |
385 | #define STL_CD1400MAXBAUD 230400 |
386 | #define STL_SC26198MAXBAUD 460800 |
387 | |
388 | #define STL_BAUDBASE 115200 |
389 | #define STL_CLOSEDELAY (5 * HZ / 10) |
390 | |
391 | /*****************************************************************************/ |
392 | |
393 | #ifdef CONFIG_PCI |
394 | |
395 | /* |
396 | * Define the Stallion PCI vendor and device IDs. |
397 | */ |
398 | #ifndef PCI_VENDOR_ID_STALLION |
399 | #define PCI_VENDOR_ID_STALLION 0x124d |
400 | #endif |
401 | #ifndef PCI_DEVICE_ID_ECHPCI832 |
402 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 |
403 | #endif |
404 | #ifndef PCI_DEVICE_ID_ECHPCI864 |
405 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 |
406 | #endif |
407 | #ifndef PCI_DEVICE_ID_EIOPCI |
408 | #define PCI_DEVICE_ID_EIOPCI 0x0003 |
409 | #endif |
410 | |
411 | /* |
412 | * Define structure to hold all Stallion PCI boards. |
413 | */ |
414 | typedef struct stlpcibrd { |
415 | unsigned short vendid; |
416 | unsigned short devid; |
417 | int brdtype; |
418 | } stlpcibrd_t; |
419 | |
420 | static stlpcibrd_t stl_pcibrds[] = { |
421 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI }, |
422 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI }, |
423 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI }, |
424 | { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI }, |
425 | }; |
426 | |
427 | static int stl_nrpcibrds = sizeof(stl_pcibrds) / sizeof(stlpcibrd_t); |
428 | |
429 | #endif |
430 | |
431 | /*****************************************************************************/ |
432 | |
433 | /* |
434 | * Define macros to extract a brd/port number from a minor number. |
435 | */ |
436 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) |
437 | #define MINOR2PORT(min) ((min) & 0x3f) |
438 | |
439 | /* |
440 | * Define a baud rate table that converts termios baud rate selector |
441 | * into the actual baud rate value. All baud rate calculations are |
442 | * based on the actual baud rate required. |
443 | */ |
444 | static unsigned int stl_baudrates[] = { |
445 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, |
446 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 |
447 | }; |
448 | |
449 | /* |
450 | * Define some handy local macros... |
451 | */ |
452 | #undef MIN |
453 | #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) |
454 | |
455 | #undef TOLOWER |
456 | #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) |
457 | |
458 | /*****************************************************************************/ |
459 | |
460 | /* |
461 | * Declare all those functions in this driver! |
462 | */ |
463 | |
464 | static void stl_argbrds(void); |
465 | static int stl_parsebrd(stlconf_t *confp, char **argp); |
466 | |
467 | static unsigned long stl_atol(char *str); |
468 | |
469 | static int stl_init(void); |
470 | static int stl_open(struct tty_struct *tty, struct file *filp); |
471 | static void stl_close(struct tty_struct *tty, struct file *filp); |
472 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count); |
473 | static void stl_putchar(struct tty_struct *tty, unsigned char ch); |
474 | static void stl_flushchars(struct tty_struct *tty); |
475 | static int stl_writeroom(struct tty_struct *tty); |
476 | static int stl_charsinbuffer(struct tty_struct *tty); |
477 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); |
478 | static void stl_settermios(struct tty_struct *tty, struct termios *old); |
479 | static void stl_throttle(struct tty_struct *tty); |
480 | static void stl_unthrottle(struct tty_struct *tty); |
481 | static void stl_stop(struct tty_struct *tty); |
482 | static void stl_start(struct tty_struct *tty); |
483 | static void stl_flushbuffer(struct tty_struct *tty); |
484 | static void stl_breakctl(struct tty_struct *tty, int state); |
485 | static void stl_waituntilsent(struct tty_struct *tty, int timeout); |
486 | static void stl_sendxchar(struct tty_struct *tty, char ch); |
487 | static void stl_hangup(struct tty_struct *tty); |
488 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); |
489 | static int stl_portinfo(stlport_t *portp, int portnr, char *pos); |
490 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data); |
491 | |
492 | static int stl_brdinit(stlbrd_t *brdp); |
493 | static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp); |
494 | static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp); |
495 | static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp); |
496 | static int stl_getbrdstats(combrd_t __user *bp); |
497 | static int stl_getportstats(stlport_t *portp, comstats_t __user *cp); |
498 | static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp); |
499 | static int stl_getportstruct(stlport_t __user *arg); |
500 | static int stl_getbrdstruct(stlbrd_t __user *arg); |
501 | static int stl_waitcarrier(stlport_t *portp, struct file *filp); |
502 | static int stl_eiointr(stlbrd_t *brdp); |
503 | static int stl_echatintr(stlbrd_t *brdp); |
504 | static int stl_echmcaintr(stlbrd_t *brdp); |
505 | static int stl_echpciintr(stlbrd_t *brdp); |
506 | static int stl_echpci64intr(stlbrd_t *brdp); |
507 | static void stl_offintr(void *private); |
508 | static void *stl_memalloc(int len); |
509 | static stlbrd_t *stl_allocbrd(void); |
510 | static stlport_t *stl_getport(int brdnr, int panelnr, int portnr); |
511 | |
512 | static inline int stl_initbrds(void); |
513 | static inline int stl_initeio(stlbrd_t *brdp); |
514 | static inline int stl_initech(stlbrd_t *brdp); |
515 | static inline int stl_getbrdnr(void); |
516 | |
517 | #ifdef CONFIG_PCI |
518 | static inline int stl_findpcibrds(void); |
519 | static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp); |
520 | #endif |
521 | |
522 | /* |
523 | * CD1400 uart specific handling functions. |
524 | */ |
525 | static void stl_cd1400setreg(stlport_t *portp, int regnr, int value); |
526 | static int stl_cd1400getreg(stlport_t *portp, int regnr); |
527 | static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value); |
528 | static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp); |
529 | static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); |
530 | static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp); |
531 | static int stl_cd1400getsignals(stlport_t *portp); |
532 | static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts); |
533 | static void stl_cd1400ccrwait(stlport_t *portp); |
534 | static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx); |
535 | static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx); |
536 | static void stl_cd1400disableintrs(stlport_t *portp); |
537 | static void stl_cd1400sendbreak(stlport_t *portp, int len); |
538 | static void stl_cd1400flowctrl(stlport_t *portp, int state); |
539 | static void stl_cd1400sendflow(stlport_t *portp, int state); |
540 | static void stl_cd1400flush(stlport_t *portp); |
541 | static int stl_cd1400datastate(stlport_t *portp); |
542 | static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase); |
543 | static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase); |
544 | static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr); |
545 | static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr); |
546 | static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr); |
547 | |
548 | static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr); |
549 | |
550 | /* |
551 | * SC26198 uart specific handling functions. |
552 | */ |
553 | static void stl_sc26198setreg(stlport_t *portp, int regnr, int value); |
554 | static int stl_sc26198getreg(stlport_t *portp, int regnr); |
555 | static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value); |
556 | static int stl_sc26198getglobreg(stlport_t *portp, int regnr); |
557 | static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp); |
558 | static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); |
559 | static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp); |
560 | static int stl_sc26198getsignals(stlport_t *portp); |
561 | static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts); |
562 | static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx); |
563 | static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx); |
564 | static void stl_sc26198disableintrs(stlport_t *portp); |
565 | static void stl_sc26198sendbreak(stlport_t *portp, int len); |
566 | static void stl_sc26198flowctrl(stlport_t *portp, int state); |
567 | static void stl_sc26198sendflow(stlport_t *portp, int state); |
568 | static void stl_sc26198flush(stlport_t *portp); |
569 | static int stl_sc26198datastate(stlport_t *portp); |
570 | static void stl_sc26198wait(stlport_t *portp); |
571 | static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty); |
572 | static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase); |
573 | static void stl_sc26198txisr(stlport_t *port); |
574 | static void stl_sc26198rxisr(stlport_t *port, unsigned int iack); |
575 | static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch); |
576 | static void stl_sc26198rxbadchars(stlport_t *portp); |
577 | static void stl_sc26198otherisr(stlport_t *port, unsigned int iack); |
578 | |
579 | /*****************************************************************************/ |
580 | |
581 | /* |
582 | * Generic UART support structure. |
583 | */ |
584 | typedef struct uart { |
585 | int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp); |
586 | void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); |
587 | void (*setport)(stlport_t *portp, struct termios *tiosp); |
588 | int (*getsignals)(stlport_t *portp); |
589 | void (*setsignals)(stlport_t *portp, int dtr, int rts); |
590 | void (*enablerxtx)(stlport_t *portp, int rx, int tx); |
591 | void (*startrxtx)(stlport_t *portp, int rx, int tx); |
592 | void (*disableintrs)(stlport_t *portp); |
593 | void (*sendbreak)(stlport_t *portp, int len); |
594 | void (*flowctrl)(stlport_t *portp, int state); |
595 | void (*sendflow)(stlport_t *portp, int state); |
596 | void (*flush)(stlport_t *portp); |
597 | int (*datastate)(stlport_t *portp); |
598 | void (*intr)(stlpanel_t *panelp, unsigned int iobase); |
599 | } uart_t; |
600 | |
601 | /* |
602 | * Define some macros to make calling these functions nice and clean. |
603 | */ |
604 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) |
605 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) |
606 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) |
607 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) |
608 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) |
609 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) |
610 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) |
611 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) |
612 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) |
613 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) |
614 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) |
615 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) |
616 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) |
617 | |
618 | /*****************************************************************************/ |
619 | |
620 | /* |
621 | * CD1400 UART specific data initialization. |
622 | */ |
623 | static uart_t stl_cd1400uart = { |
624 | stl_cd1400panelinit, |
625 | stl_cd1400portinit, |
626 | stl_cd1400setport, |
627 | stl_cd1400getsignals, |
628 | stl_cd1400setsignals, |
629 | stl_cd1400enablerxtx, |
630 | stl_cd1400startrxtx, |
631 | stl_cd1400disableintrs, |
632 | stl_cd1400sendbreak, |
633 | stl_cd1400flowctrl, |
634 | stl_cd1400sendflow, |
635 | stl_cd1400flush, |
636 | stl_cd1400datastate, |
637 | stl_cd1400eiointr |
638 | }; |
639 | |
640 | /* |
641 | * Define the offsets within the register bank of a cd1400 based panel. |
642 | * These io address offsets are common to the EasyIO board as well. |
643 | */ |
644 | #define EREG_ADDR 0 |
645 | #define EREG_DATA 4 |
646 | #define EREG_RXACK 5 |
647 | #define EREG_TXACK 6 |
648 | #define EREG_MDACK 7 |
649 | |
650 | #define EREG_BANKSIZE 8 |
651 | |
652 | #define CD1400_CLK 25000000 |
653 | #define CD1400_CLK8M 20000000 |
654 | |
655 | /* |
656 | * Define the cd1400 baud rate clocks. These are used when calculating |
657 | * what clock and divisor to use for the required baud rate. Also |
658 | * define the maximum baud rate allowed, and the default base baud. |
659 | */ |
660 | static int stl_cd1400clkdivs[] = { |
661 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 |
662 | }; |
663 | |
664 | /*****************************************************************************/ |
665 | |
666 | /* |
667 | * SC26198 UART specific data initization. |
668 | */ |
669 | static uart_t stl_sc26198uart = { |
670 | stl_sc26198panelinit, |
671 | stl_sc26198portinit, |
672 | stl_sc26198setport, |
673 | stl_sc26198getsignals, |
674 | stl_sc26198setsignals, |
675 | stl_sc26198enablerxtx, |
676 | stl_sc26198startrxtx, |
677 | stl_sc26198disableintrs, |
678 | stl_sc26198sendbreak, |
679 | stl_sc26198flowctrl, |
680 | stl_sc26198sendflow, |
681 | stl_sc26198flush, |
682 | stl_sc26198datastate, |
683 | stl_sc26198intr |
684 | }; |
685 | |
686 | /* |
687 | * Define the offsets within the register bank of a sc26198 based panel. |
688 | */ |
689 | #define XP_DATA 0 |
690 | #define XP_ADDR 1 |
691 | #define XP_MODID 2 |
692 | #define XP_STATUS 2 |
693 | #define XP_IACK 3 |
694 | |
695 | #define XP_BANKSIZE 4 |
696 | |
697 | /* |
698 | * Define the sc26198 baud rate table. Offsets within the table |
699 | * represent the actual baud rate selector of sc26198 registers. |
700 | */ |
701 | static unsigned int sc26198_baudtable[] = { |
702 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, |
703 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, |
704 | 230400, 460800, 921600 |
705 | }; |
706 | |
707 | #define SC26198_NRBAUDS (sizeof(sc26198_baudtable) / sizeof(unsigned int)) |
708 | |
709 | /*****************************************************************************/ |
710 | |
711 | /* |
712 | * Define the driver info for a user level control device. Used mainly |
713 | * to get at port stats - only not using the port device itself. |
714 | */ |
715 | static struct file_operations stl_fsiomem = { |
716 | .owner = THIS_MODULE, |
717 | .ioctl = stl_memioctl, |
718 | }; |
719 | |
720 | /*****************************************************************************/ |
721 | |
722 | static struct class_simple *stallion_class; |
723 | |
724 | /* |
725 | * Loadable module initialization stuff. |
726 | */ |
727 | |
728 | static int __init stallion_module_init(void) |
729 | { |
730 | unsigned long flags; |
731 | |
732 | #ifdef DEBUG |
733 | printk("init_module()\n"); |
734 | #endif |
735 | |
736 | save_flags(flags); |
737 | cli(); |
738 | stl_init(); |
739 | restore_flags(flags); |
740 | |
741 | return(0); |
742 | } |
743 | |
744 | /*****************************************************************************/ |
745 | |
746 | static void __exit stallion_module_exit(void) |
747 | { |
748 | stlbrd_t *brdp; |
749 | stlpanel_t *panelp; |
750 | stlport_t *portp; |
751 | unsigned long flags; |
752 | int i, j, k; |
753 | |
754 | #ifdef DEBUG |
755 | printk("cleanup_module()\n"); |
756 | #endif |
757 | |
758 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, |
759 | stl_drvversion); |
760 | |
761 | save_flags(flags); |
762 | cli(); |
763 | |
764 | /* |
765 | * Free up all allocated resources used by the ports. This includes |
766 | * memory and interrupts. As part of this process we will also do |
767 | * a hangup on every open port - to try to flush out any processes |
768 | * hanging onto ports. |
769 | */ |
770 | i = tty_unregister_driver(stl_serial); |
771 | put_tty_driver(stl_serial); |
772 | if (i) { |
773 | printk("STALLION: failed to un-register tty driver, " |
774 | "errno=%d\n", -i); |
775 | restore_flags(flags); |
776 | return; |
777 | } |
778 | for (i = 0; i < 4; i++) { |
779 | devfs_remove("staliomem/%d", i); |
780 | class_simple_device_remove(MKDEV(STL_SIOMEMMAJOR, i)); |
781 | } |
782 | devfs_remove("staliomem"); |
783 | if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) |
784 | printk("STALLION: failed to un-register serial memory device, " |
785 | "errno=%d\n", -i); |
786 | class_simple_destroy(stallion_class); |
787 | |
788 | if (stl_tmpwritebuf != (char *) NULL) |
789 | kfree(stl_tmpwritebuf); |
790 | |
791 | for (i = 0; (i < stl_nrbrds); i++) { |
792 | if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) |
793 | continue; |
794 | |
795 | free_irq(brdp->irq, brdp); |
796 | |
797 | for (j = 0; (j < STL_MAXPANELS); j++) { |
798 | panelp = brdp->panels[j]; |
799 | if (panelp == (stlpanel_t *) NULL) |
800 | continue; |
801 | for (k = 0; (k < STL_PORTSPERPANEL); k++) { |
802 | portp = panelp->ports[k]; |
803 | if (portp == (stlport_t *) NULL) |
804 | continue; |
805 | if (portp->tty != (struct tty_struct *) NULL) |
806 | stl_hangup(portp->tty); |
807 | if (portp->tx.buf != (char *) NULL) |
808 | kfree(portp->tx.buf); |
809 | kfree(portp); |
810 | } |
811 | kfree(panelp); |
812 | } |
813 | |
814 | release_region(brdp->ioaddr1, brdp->iosize1); |
815 | if (brdp->iosize2 > 0) |
816 | release_region(brdp->ioaddr2, brdp->iosize2); |
817 | |
818 | kfree(brdp); |
819 | stl_brds[i] = (stlbrd_t *) NULL; |
820 | } |
821 | |
822 | restore_flags(flags); |
823 | } |
824 | |
825 | module_init(stallion_module_init); |
826 | module_exit(stallion_module_exit); |
827 | |
828 | /*****************************************************************************/ |
829 | |
830 | /* |
831 | * Check for any arguments passed in on the module load command line. |
832 | */ |
833 | |
834 | static void stl_argbrds(void) |
835 | { |
836 | stlconf_t conf; |
837 | stlbrd_t *brdp; |
838 | int i; |
839 | |
840 | #ifdef DEBUG |
841 | printk("stl_argbrds()\n"); |
842 | #endif |
843 | |
844 | for (i = stl_nrbrds; (i < stl_nargs); i++) { |
845 | memset(&conf, 0, sizeof(conf)); |
846 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) |
847 | continue; |
848 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) |
849 | continue; |
850 | stl_nrbrds = i + 1; |
851 | brdp->brdnr = i; |
852 | brdp->brdtype = conf.brdtype; |
853 | brdp->ioaddr1 = conf.ioaddr1; |
854 | brdp->ioaddr2 = conf.ioaddr2; |
855 | brdp->irq = conf.irq; |
856 | brdp->irqtype = conf.irqtype; |
857 | stl_brdinit(brdp); |
858 | } |
859 | } |
860 | |
861 | /*****************************************************************************/ |
862 | |
863 | /* |
864 | * Convert an ascii string number into an unsigned long. |
865 | */ |
866 | |
867 | static unsigned long stl_atol(char *str) |
868 | { |
869 | unsigned long val; |
870 | int base, c; |
871 | char *sp; |
872 | |
873 | val = 0; |
874 | sp = str; |
875 | if ((*sp == '0') && (*(sp+1) == 'x')) { |
876 | base = 16; |
877 | sp += 2; |
878 | } else if (*sp == '0') { |
879 | base = 8; |
880 | sp++; |
881 | } else { |
882 | base = 10; |
883 | } |
884 | |
885 | for (; (*sp != 0); sp++) { |
886 | c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); |
887 | if ((c < 0) || (c >= base)) { |
888 | printk("STALLION: invalid argument %s\n", str); |
889 | val = 0; |
890 | break; |
891 | } |
892 | val = (val * base) + c; |
893 | } |
894 | return(val); |
895 | } |
896 | |
897 | /*****************************************************************************/ |
898 | |
899 | /* |
900 | * Parse the supplied argument string, into the board conf struct. |
901 | */ |
902 | |
903 | static int stl_parsebrd(stlconf_t *confp, char **argp) |
904 | { |
905 | char *sp; |
906 | int nrbrdnames, i; |
907 | |
908 | #ifdef DEBUG |
909 | printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp); |
910 | #endif |
911 | |
912 | if ((argp[0] == (char *) NULL) || (*argp[0] == 0)) |
913 | return(0); |
914 | |
915 | for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) |
916 | *sp = TOLOWER(*sp); |
917 | |
918 | nrbrdnames = sizeof(stl_brdstr) / sizeof(stlbrdtype_t); |
919 | for (i = 0; (i < nrbrdnames); i++) { |
920 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
921 | break; |
922 | } |
923 | if (i >= nrbrdnames) { |
924 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
925 | return(0); |
926 | } |
927 | |
928 | confp->brdtype = stl_brdstr[i].type; |
929 | |
930 | i = 1; |
931 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) |
932 | confp->ioaddr1 = stl_atol(argp[i]); |
933 | i++; |
934 | if (confp->brdtype == BRD_ECH) { |
935 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) |
936 | confp->ioaddr2 = stl_atol(argp[i]); |
937 | i++; |
938 | } |
939 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) |
940 | confp->irq = stl_atol(argp[i]); |
941 | return(1); |
942 | } |
943 | |
944 | /*****************************************************************************/ |
945 | |
946 | /* |
947 | * Local driver kernel memory allocation routine. |
948 | */ |
949 | |
950 | static void *stl_memalloc(int len) |
951 | { |
952 | return((void *) kmalloc(len, GFP_KERNEL)); |
953 | } |
954 | |
955 | /*****************************************************************************/ |
956 | |
957 | /* |
958 | * Allocate a new board structure. Fill out the basic info in it. |
959 | */ |
960 | |
961 | static stlbrd_t *stl_allocbrd(void) |
962 | { |
963 | stlbrd_t *brdp; |
964 | |
965 | brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t)); |
966 | if (brdp == (stlbrd_t *) NULL) { |
967 | printk("STALLION: failed to allocate memory (size=%d)\n", |
968 | sizeof(stlbrd_t)); |
969 | return((stlbrd_t *) NULL); |
970 | } |
971 | |
972 | memset(brdp, 0, sizeof(stlbrd_t)); |
973 | brdp->magic = STL_BOARDMAGIC; |
974 | return(brdp); |
975 | } |
976 | |
977 | /*****************************************************************************/ |
978 | |
979 | static int stl_open(struct tty_struct *tty, struct file *filp) |
980 | { |
981 | stlport_t *portp; |
982 | stlbrd_t *brdp; |
983 | unsigned int minordev; |
984 | int brdnr, panelnr, portnr, rc; |
985 | |
986 | #ifdef DEBUG |
987 | printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty, |
988 | (int) filp, tty->name); |
989 | #endif |
990 | |
991 | minordev = tty->index; |
992 | brdnr = MINOR2BRD(minordev); |
993 | if (brdnr >= stl_nrbrds) |
994 | return(-ENODEV); |
995 | brdp = stl_brds[brdnr]; |
996 | if (brdp == (stlbrd_t *) NULL) |
997 | return(-ENODEV); |
998 | minordev = MINOR2PORT(minordev); |
999 | for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { |
1000 | if (brdp->panels[panelnr] == (stlpanel_t *) NULL) |
1001 | break; |
1002 | if (minordev < brdp->panels[panelnr]->nrports) { |
1003 | portnr = minordev; |
1004 | break; |
1005 | } |
1006 | minordev -= brdp->panels[panelnr]->nrports; |
1007 | } |
1008 | if (portnr < 0) |
1009 | return(-ENODEV); |
1010 | |
1011 | portp = brdp->panels[panelnr]->ports[portnr]; |
1012 | if (portp == (stlport_t *) NULL) |
1013 | return(-ENODEV); |
1014 | |
1015 | /* |
1016 | * On the first open of the device setup the port hardware, and |
1017 | * initialize the per port data structure. |
1018 | */ |
1019 | portp->tty = tty; |
1020 | tty->driver_data = portp; |
1021 | portp->refcount++; |
1022 | |
1023 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { |
1024 | if (portp->tx.buf == (char *) NULL) { |
1025 | portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE); |
1026 | if (portp->tx.buf == (char *) NULL) |
1027 | return(-ENOMEM); |
1028 | portp->tx.head = portp->tx.buf; |
1029 | portp->tx.tail = portp->tx.buf; |
1030 | } |
1031 | stl_setport(portp, tty->termios); |
1032 | portp->sigs = stl_getsignals(portp); |
1033 | stl_setsignals(portp, 1, 1); |
1034 | stl_enablerxtx(portp, 1, 1); |
1035 | stl_startrxtx(portp, 1, 0); |
1036 | clear_bit(TTY_IO_ERROR, &tty->flags); |
1037 | portp->flags |= ASYNC_INITIALIZED; |
1038 | } |
1039 | |
1040 | /* |
1041 | * Check if this port is in the middle of closing. If so then wait |
1042 | * until it is closed then return error status, based on flag settings. |
1043 | * The sleep here does not need interrupt protection since the wakeup |
1044 | * for it is done with the same context. |
1045 | */ |
1046 | if (portp->flags & ASYNC_CLOSING) { |
1047 | interruptible_sleep_on(&portp->close_wait); |
1048 | if (portp->flags & ASYNC_HUP_NOTIFY) |
1049 | return(-EAGAIN); |
1050 | return(-ERESTARTSYS); |
1051 | } |
1052 | |
1053 | /* |
1054 | * Based on type of open being done check if it can overlap with any |
1055 | * previous opens still in effect. If we are a normal serial device |
1056 | * then also we might have to wait for carrier. |
1057 | */ |
1058 | if (!(filp->f_flags & O_NONBLOCK)) { |
1059 | if ((rc = stl_waitcarrier(portp, filp)) != 0) |
1060 | return(rc); |
1061 | } |
1062 | portp->flags |= ASYNC_NORMAL_ACTIVE; |
1063 | |
1064 | return(0); |
1065 | } |
1066 | |
1067 | /*****************************************************************************/ |
1068 | |
1069 | /* |
1070 | * Possibly need to wait for carrier (DCD signal) to come high. Say |
1071 | * maybe because if we are clocal then we don't need to wait... |
1072 | */ |
1073 | |
1074 | static int stl_waitcarrier(stlport_t *portp, struct file *filp) |
1075 | { |
1076 | unsigned long flags; |
1077 | int rc, doclocal; |
1078 | |
1079 | #ifdef DEBUG |
1080 | printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp); |
1081 | #endif |
1082 | |
1083 | rc = 0; |
1084 | doclocal = 0; |
1085 | |
1086 | if (portp->tty->termios->c_cflag & CLOCAL) |
1087 | doclocal++; |
1088 | |
1089 | save_flags(flags); |
1090 | cli(); |
1091 | portp->openwaitcnt++; |
1092 | if (! tty_hung_up_p(filp)) |
1093 | portp->refcount--; |
1094 | |
1095 | for (;;) { |
1096 | stl_setsignals(portp, 1, 1); |
1097 | if (tty_hung_up_p(filp) || |
1098 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { |
1099 | if (portp->flags & ASYNC_HUP_NOTIFY) |
1100 | rc = -EBUSY; |
1101 | else |
1102 | rc = -ERESTARTSYS; |
1103 | break; |
1104 | } |
1105 | if (((portp->flags & ASYNC_CLOSING) == 0) && |
1106 | (doclocal || (portp->sigs & TIOCM_CD))) { |
1107 | break; |
1108 | } |
1109 | if (signal_pending(current)) { |
1110 | rc = -ERESTARTSYS; |
1111 | break; |
1112 | } |
1113 | interruptible_sleep_on(&portp->open_wait); |
1114 | } |
1115 | |
1116 | if (! tty_hung_up_p(filp)) |
1117 | portp->refcount++; |
1118 | portp->openwaitcnt--; |
1119 | restore_flags(flags); |
1120 | |
1121 | return(rc); |
1122 | } |
1123 | |
1124 | /*****************************************************************************/ |
1125 | |
1126 | static void stl_close(struct tty_struct *tty, struct file *filp) |
1127 | { |
1128 | stlport_t *portp; |
1129 | unsigned long flags; |
1130 | |
1131 | #ifdef DEBUG |
1132 | printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp); |
1133 | #endif |
1134 | |
1135 | portp = tty->driver_data; |
1136 | if (portp == (stlport_t *) NULL) |
1137 | return; |
1138 | |
1139 | save_flags(flags); |
1140 | cli(); |
1141 | if (tty_hung_up_p(filp)) { |
1142 | restore_flags(flags); |
1143 | return; |
1144 | } |
1145 | if ((tty->count == 1) && (portp->refcount != 1)) |
1146 | portp->refcount = 1; |
1147 | if (portp->refcount-- > 1) { |
1148 | restore_flags(flags); |
1149 | return; |
1150 | } |
1151 | |
1152 | portp->refcount = 0; |
1153 | portp->flags |= ASYNC_CLOSING; |
1154 | |
1155 | /* |
1156 | * May want to wait for any data to drain before closing. The BUSY |
1157 | * flag keeps track of whether we are still sending or not - it is |
1158 | * very accurate for the cd1400, not quite so for the sc26198. |
1159 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) |
1160 | */ |
1161 | tty->closing = 1; |
1162 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1163 | tty_wait_until_sent(tty, portp->closing_wait); |
1164 | stl_waituntilsent(tty, (HZ / 2)); |
1165 | |
1166 | portp->flags &= ~ASYNC_INITIALIZED; |
1167 | stl_disableintrs(portp); |
1168 | if (tty->termios->c_cflag & HUPCL) |
1169 | stl_setsignals(portp, 0, 0); |
1170 | stl_enablerxtx(portp, 0, 0); |
1171 | stl_flushbuffer(tty); |
1172 | portp->istate = 0; |
1173 | if (portp->tx.buf != (char *) NULL) { |
1174 | kfree(portp->tx.buf); |
1175 | portp->tx.buf = (char *) NULL; |
1176 | portp->tx.head = (char *) NULL; |
1177 | portp->tx.tail = (char *) NULL; |
1178 | } |
1179 | set_bit(TTY_IO_ERROR, &tty->flags); |
1180 | tty_ldisc_flush(tty); |
1181 | |
1182 | tty->closing = 0; |
1183 | portp->tty = (struct tty_struct *) NULL; |
1184 | |
1185 | if (portp->openwaitcnt) { |
1186 | if (portp->close_delay) |
1187 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); |
1188 | wake_up_interruptible(&portp->open_wait); |
1189 | } |
1190 | |
1191 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
1192 | wake_up_interruptible(&portp->close_wait); |
1193 | restore_flags(flags); |
1194 | } |
1195 | |
1196 | /*****************************************************************************/ |
1197 | |
1198 | /* |
1199 | * Write routine. Take data and stuff it in to the TX ring queue. |
1200 | * If transmit interrupts are not running then start them. |
1201 | */ |
1202 | |
1203 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) |
1204 | { |
1205 | stlport_t *portp; |
1206 | unsigned int len, stlen; |
1207 | unsigned char *chbuf; |
1208 | char *head, *tail; |
1209 | |
1210 | #ifdef DEBUG |
1211 | printk("stl_write(tty=%x,buf=%x,count=%d)\n", |
1212 | (int) tty, (int) buf, count); |
1213 | #endif |
1214 | |
1215 | if ((tty == (struct tty_struct *) NULL) || |
1216 | (stl_tmpwritebuf == (char *) NULL)) |
1217 | return(0); |
1218 | portp = tty->driver_data; |
1219 | if (portp == (stlport_t *) NULL) |
1220 | return(0); |
1221 | if (portp->tx.buf == (char *) NULL) |
1222 | return(0); |
1223 | |
1224 | /* |
1225 | * If copying direct from user space we must cater for page faults, |
1226 | * causing us to "sleep" here for a while. To handle this copy in all |
1227 | * the data we need now, into a local buffer. Then when we got it all |
1228 | * copy it into the TX buffer. |
1229 | */ |
1230 | chbuf = (unsigned char *) buf; |
1231 | |
1232 | head = portp->tx.head; |
1233 | tail = portp->tx.tail; |
1234 | if (head >= tail) { |
1235 | len = STL_TXBUFSIZE - (head - tail) - 1; |
1236 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); |
1237 | } else { |
1238 | len = tail - head - 1; |
1239 | stlen = len; |
1240 | } |
1241 | |
1242 | len = MIN(len, count); |
1243 | count = 0; |
1244 | while (len > 0) { |
1245 | stlen = MIN(len, stlen); |
1246 | memcpy(head, chbuf, stlen); |
1247 | len -= stlen; |
1248 | chbuf += stlen; |
1249 | count += stlen; |
1250 | head += stlen; |
1251 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { |
1252 | head = portp->tx.buf; |
1253 | stlen = tail - head; |
1254 | } |
1255 | } |
1256 | portp->tx.head = head; |
1257 | |
1258 | clear_bit(ASYI_TXLOW, &portp->istate); |
1259 | stl_startrxtx(portp, -1, 1); |
1260 | |
1261 | return(count); |
1262 | } |
1263 | |
1264 | /*****************************************************************************/ |
1265 | |
1266 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) |
1267 | { |
1268 | stlport_t *portp; |
1269 | unsigned int len; |
1270 | char *head, *tail; |
1271 | |
1272 | #ifdef DEBUG |
1273 | printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch); |
1274 | #endif |
1275 | |
1276 | if (tty == (struct tty_struct *) NULL) |
1277 | return; |
1278 | portp = tty->driver_data; |
1279 | if (portp == (stlport_t *) NULL) |
1280 | return; |
1281 | if (portp->tx.buf == (char *) NULL) |
1282 | return; |
1283 | |
1284 | head = portp->tx.head; |
1285 | tail = portp->tx.tail; |
1286 | |
1287 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); |
1288 | len--; |
1289 | |
1290 | if (len > 0) { |
1291 | *head++ = ch; |
1292 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) |
1293 | head = portp->tx.buf; |
1294 | } |
1295 | portp->tx.head = head; |
1296 | } |
1297 | |
1298 | /*****************************************************************************/ |
1299 | |
1300 | /* |
1301 | * If there are any characters in the buffer then make sure that TX |
1302 | * interrupts are on and get'em out. Normally used after the putchar |
1303 | * routine has been called. |
1304 | */ |
1305 | |
1306 | static void stl_flushchars(struct tty_struct *tty) |
1307 | { |
1308 | stlport_t *portp; |
1309 | |
1310 | #ifdef DEBUG |
1311 | printk("stl_flushchars(tty=%x)\n", (int) tty); |
1312 | #endif |
1313 | |
1314 | if (tty == (struct tty_struct *) NULL) |
1315 | return; |
1316 | portp = tty->driver_data; |
1317 | if (portp == (stlport_t *) NULL) |
1318 | return; |
1319 | if (portp->tx.buf == (char *) NULL) |
1320 | return; |
1321 | |
1322 | #if 0 |
1323 | if (tty->stopped || tty->hw_stopped || |
1324 | (portp->tx.head == portp->tx.tail)) |
1325 | return; |
1326 | #endif |
1327 | stl_startrxtx(portp, -1, 1); |
1328 | } |
1329 | |
1330 | /*****************************************************************************/ |
1331 | |
1332 | static int stl_writeroom(struct tty_struct *tty) |
1333 | { |
1334 | stlport_t *portp; |
1335 | char *head, *tail; |
1336 | |
1337 | #ifdef DEBUG |
1338 | printk("stl_writeroom(tty=%x)\n", (int) tty); |
1339 | #endif |
1340 | |
1341 | if (tty == (struct tty_struct *) NULL) |
1342 | return(0); |
1343 | portp = tty->driver_data; |
1344 | if (portp == (stlport_t *) NULL) |
1345 | return(0); |
1346 | if (portp->tx.buf == (char *) NULL) |
1347 | return(0); |
1348 | |
1349 | head = portp->tx.head; |
1350 | tail = portp->tx.tail; |
1351 | return((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); |
1352 | } |
1353 | |
1354 | /*****************************************************************************/ |
1355 | |
1356 | /* |
1357 | * Return number of chars in the TX buffer. Normally we would just |
1358 | * calculate the number of chars in the buffer and return that, but if |
1359 | * the buffer is empty and TX interrupts are still on then we return |
1360 | * that the buffer still has 1 char in it. This way whoever called us |
1361 | * will not think that ALL chars have drained - since the UART still |
1362 | * must have some chars in it (we are busy after all). |
1363 | */ |
1364 | |
1365 | static int stl_charsinbuffer(struct tty_struct *tty) |
1366 | { |
1367 | stlport_t *portp; |
1368 | unsigned int size; |
1369 | char *head, *tail; |
1370 | |
1371 | #ifdef DEBUG |
1372 | printk("stl_charsinbuffer(tty=%x)\n", (int) tty); |
1373 | #endif |
1374 | |
1375 | if (tty == (struct tty_struct *) NULL) |
1376 | return(0); |
1377 | portp = tty->driver_data; |
1378 | if (portp == (stlport_t *) NULL) |
1379 | return(0); |
1380 | if (portp->tx.buf == (char *) NULL) |
1381 | return(0); |
1382 | |
1383 | head = portp->tx.head; |
1384 | tail = portp->tx.tail; |
1385 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
1386 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) |
1387 | size = 1; |
1388 | return(size); |
1389 | } |
1390 | |
1391 | /*****************************************************************************/ |
1392 | |
1393 | /* |
1394 | * Generate the serial struct info. |
1395 | */ |
1396 | |
1397 | static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp) |
1398 | { |
1399 | struct serial_struct sio; |
1400 | stlbrd_t *brdp; |
1401 | |
1402 | #ifdef DEBUG |
1403 | printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); |
1404 | #endif |
1405 | |
1406 | memset(&sio, 0, sizeof(struct serial_struct)); |
1407 | sio.line = portp->portnr; |
1408 | sio.port = portp->ioaddr; |
1409 | sio.flags = portp->flags; |
1410 | sio.baud_base = portp->baud_base; |
1411 | sio.close_delay = portp->close_delay; |
1412 | sio.closing_wait = portp->closing_wait; |
1413 | sio.custom_divisor = portp->custom_divisor; |
1414 | sio.hub6 = 0; |
1415 | if (portp->uartp == &stl_cd1400uart) { |
1416 | sio.type = PORT_CIRRUS; |
1417 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; |
1418 | } else { |
1419 | sio.type = PORT_UNKNOWN; |
1420 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; |
1421 | } |
1422 | |
1423 | brdp = stl_brds[portp->brdnr]; |
1424 | if (brdp != (stlbrd_t *) NULL) |
1425 | sio.irq = brdp->irq; |
1426 | |
1427 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; |
1428 | } |
1429 | |
1430 | /*****************************************************************************/ |
1431 | |
1432 | /* |
1433 | * Set port according to the serial struct info. |
1434 | * At this point we do not do any auto-configure stuff, so we will |
1435 | * just quietly ignore any requests to change irq, etc. |
1436 | */ |
1437 | |
1438 | static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp) |
1439 | { |
1440 | struct serial_struct sio; |
1441 | |
1442 | #ifdef DEBUG |
1443 | printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); |
1444 | #endif |
1445 | |
1446 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) |
1447 | return -EFAULT; |
1448 | if (!capable(CAP_SYS_ADMIN)) { |
1449 | if ((sio.baud_base != portp->baud_base) || |
1450 | (sio.close_delay != portp->close_delay) || |
1451 | ((sio.flags & ~ASYNC_USR_MASK) != |
1452 | (portp->flags & ~ASYNC_USR_MASK))) |
1453 | return(-EPERM); |
1454 | } |
1455 | |
1456 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | |
1457 | (sio.flags & ASYNC_USR_MASK); |
1458 | portp->baud_base = sio.baud_base; |
1459 | portp->close_delay = sio.close_delay; |
1460 | portp->closing_wait = sio.closing_wait; |
1461 | portp->custom_divisor = sio.custom_divisor; |
1462 | stl_setport(portp, portp->tty->termios); |
1463 | return(0); |
1464 | } |
1465 | |
1466 | /*****************************************************************************/ |
1467 | |
1468 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) |
1469 | { |
1470 | stlport_t *portp; |
1471 | |
1472 | if (tty == (struct tty_struct *) NULL) |
1473 | return(-ENODEV); |
1474 | portp = tty->driver_data; |
1475 | if (portp == (stlport_t *) NULL) |
1476 | return(-ENODEV); |
1477 | if (tty->flags & (1 << TTY_IO_ERROR)) |
1478 | return(-EIO); |
1479 | |
1480 | return stl_getsignals(portp); |
1481 | } |
1482 | |
1483 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, |
1484 | unsigned int set, unsigned int clear) |
1485 | { |
1486 | stlport_t *portp; |
1487 | int rts = -1, dtr = -1; |
1488 | |
1489 | if (tty == (struct tty_struct *) NULL) |
1490 | return(-ENODEV); |
1491 | portp = tty->driver_data; |
1492 | if (portp == (stlport_t *) NULL) |
1493 | return(-ENODEV); |
1494 | if (tty->flags & (1 << TTY_IO_ERROR)) |
1495 | return(-EIO); |
1496 | |
1497 | if (set & TIOCM_RTS) |
1498 | rts = 1; |
1499 | if (set & TIOCM_DTR) |
1500 | dtr = 1; |
1501 | if (clear & TIOCM_RTS) |
1502 | rts = 0; |
1503 | if (clear & TIOCM_DTR) |
1504 | dtr = 0; |
1505 | |
1506 | stl_setsignals(portp, dtr, rts); |
1507 | return 0; |
1508 | } |
1509 | |
1510 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) |
1511 | { |
1512 | stlport_t *portp; |
1513 | unsigned int ival; |
1514 | int rc; |
1515 | void __user *argp = (void __user *)arg; |
1516 | |
1517 | #ifdef DEBUG |
1518 | printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", |
1519 | (int) tty, (int) file, cmd, (int) arg); |
1520 | #endif |
1521 | |
1522 | if (tty == (struct tty_struct *) NULL) |
1523 | return(-ENODEV); |
1524 | portp = tty->driver_data; |
1525 | if (portp == (stlport_t *) NULL) |
1526 | return(-ENODEV); |
1527 | |
1528 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
1529 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { |
1530 | if (tty->flags & (1 << TTY_IO_ERROR)) |
1531 | return(-EIO); |
1532 | } |
1533 | |
1534 | rc = 0; |
1535 | |
1536 | switch (cmd) { |
1537 | case TIOCGSOFTCAR: |
1538 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), |
1539 | (unsigned __user *) argp); |
1540 | break; |
1541 | case TIOCSSOFTCAR: |
1542 | if (get_user(ival, (unsigned int __user *) arg)) |
1543 | return -EFAULT; |
1544 | tty->termios->c_cflag = |
1545 | (tty->termios->c_cflag & ~CLOCAL) | |
1546 | (ival ? CLOCAL : 0); |
1547 | break; |
1548 | case TIOCGSERIAL: |
1549 | rc = stl_getserial(portp, argp); |
1550 | break; |
1551 | case TIOCSSERIAL: |
1552 | rc = stl_setserial(portp, argp); |
1553 | break; |
1554 | case COM_GETPORTSTATS: |
1555 | rc = stl_getportstats(portp, argp); |
1556 | break; |
1557 | case COM_CLRPORTSTATS: |
1558 | rc = stl_clrportstats(portp, argp); |
1559 | break; |
1560 | case TIOCSERCONFIG: |
1561 | case TIOCSERGWILD: |
1562 | case TIOCSERSWILD: |
1563 | case TIOCSERGETLSR: |
1564 | case TIOCSERGSTRUCT: |
1565 | case TIOCSERGETMULTI: |
1566 | case TIOCSERSETMULTI: |
1567 | default: |
1568 | rc = -ENOIOCTLCMD; |
1569 | break; |
1570 | } |
1571 | |
1572 | return(rc); |
1573 | } |
1574 | |
1575 | /*****************************************************************************/ |
1576 | |
1577 | static void stl_settermios(struct tty_struct *tty, struct termios *old) |
1578 | { |
1579 | stlport_t *portp; |
1580 | struct termios *tiosp; |
1581 | |
1582 | #ifdef DEBUG |
1583 | printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old); |
1584 | #endif |
1585 | |
1586 | if (tty == (struct tty_struct *) NULL) |
1587 | return; |
1588 | portp = tty->driver_data; |
1589 | if (portp == (stlport_t *) NULL) |
1590 | return; |
1591 | |
1592 | tiosp = tty->termios; |
1593 | if ((tiosp->c_cflag == old->c_cflag) && |
1594 | (tiosp->c_iflag == old->c_iflag)) |
1595 | return; |
1596 | |
1597 | stl_setport(portp, tiosp); |
1598 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), |
1599 | -1); |
1600 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { |
1601 | tty->hw_stopped = 0; |
1602 | stl_start(tty); |
1603 | } |
1604 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) |
1605 | wake_up_interruptible(&portp->open_wait); |
1606 | } |
1607 | |
1608 | /*****************************************************************************/ |
1609 | |
1610 | /* |
1611 | * Attempt to flow control who ever is sending us data. Based on termios |
1612 | * settings use software or/and hardware flow control. |
1613 | */ |
1614 | |
1615 | static void stl_throttle(struct tty_struct *tty) |
1616 | { |
1617 | stlport_t *portp; |
1618 | |
1619 | #ifdef DEBUG |
1620 | printk("stl_throttle(tty=%x)\n", (int) tty); |
1621 | #endif |
1622 | |
1623 | if (tty == (struct tty_struct *) NULL) |
1624 | return; |
1625 | portp = tty->driver_data; |
1626 | if (portp == (stlport_t *) NULL) |
1627 | return; |
1628 | stl_flowctrl(portp, 0); |
1629 | } |
1630 | |
1631 | /*****************************************************************************/ |
1632 | |
1633 | /* |
1634 | * Unflow control the device sending us data... |
1635 | */ |
1636 | |
1637 | static void stl_unthrottle(struct tty_struct *tty) |
1638 | { |
1639 | stlport_t *portp; |
1640 | |
1641 | #ifdef DEBUG |
1642 | printk("stl_unthrottle(tty=%x)\n", (int) tty); |
1643 | #endif |
1644 | |
1645 | if (tty == (struct tty_struct *) NULL) |
1646 | return; |
1647 | portp = tty->driver_data; |
1648 | if (portp == (stlport_t *) NULL) |
1649 | return; |
1650 | stl_flowctrl(portp, 1); |
1651 | } |
1652 | |
1653 | /*****************************************************************************/ |
1654 | |
1655 | /* |
1656 | * Stop the transmitter. Basically to do this we will just turn TX |
1657 | * interrupts off. |
1658 | */ |
1659 | |
1660 | static void stl_stop(struct tty_struct *tty) |
1661 | { |
1662 | stlport_t *portp; |
1663 | |
1664 | #ifdef DEBUG |
1665 | printk("stl_stop(tty=%x)\n", (int) tty); |
1666 | #endif |
1667 | |
1668 | if (tty == (struct tty_struct *) NULL) |
1669 | return; |
1670 | portp = tty->driver_data; |
1671 | if (portp == (stlport_t *) NULL) |
1672 | return; |
1673 | stl_startrxtx(portp, -1, 0); |
1674 | } |
1675 | |
1676 | /*****************************************************************************/ |
1677 | |
1678 | /* |
1679 | * Start the transmitter again. Just turn TX interrupts back on. |
1680 | */ |
1681 | |
1682 | static void stl_start(struct tty_struct *tty) |
1683 | { |
1684 | stlport_t *portp; |
1685 | |
1686 | #ifdef DEBUG |
1687 | printk("stl_start(tty=%x)\n", (int) tty); |
1688 | #endif |
1689 | |
1690 | if (tty == (struct tty_struct *) NULL) |
1691 | return; |
1692 | portp = tty->driver_data; |
1693 | if (portp == (stlport_t *) NULL) |
1694 | return; |
1695 | stl_startrxtx(portp, -1, 1); |
1696 | } |
1697 | |
1698 | /*****************************************************************************/ |
1699 | |
1700 | /* |
1701 | * Hangup this port. This is pretty much like closing the port, only |
1702 | * a little more brutal. No waiting for data to drain. Shutdown the |
1703 | * port and maybe drop signals. |
1704 | */ |
1705 | |
1706 | static void stl_hangup(struct tty_struct *tty) |
1707 | { |
1708 | stlport_t *portp; |
1709 | |
1710 | #ifdef DEBUG |
1711 | printk("stl_hangup(tty=%x)\n", (int) tty); |
1712 | #endif |
1713 | |
1714 | if (tty == (struct tty_struct *) NULL) |
1715 | return; |
1716 | portp = tty->driver_data; |
1717 | if (portp == (stlport_t *) NULL) |
1718 | return; |
1719 | |
1720 | portp->flags &= ~ASYNC_INITIALIZED; |
1721 | stl_disableintrs(portp); |
1722 | if (tty->termios->c_cflag & HUPCL) |
1723 | stl_setsignals(portp, 0, 0); |
1724 | stl_enablerxtx(portp, 0, 0); |
1725 | stl_flushbuffer(tty); |
1726 | portp->istate = 0; |
1727 | set_bit(TTY_IO_ERROR, &tty->flags); |
1728 | if (portp->tx.buf != (char *) NULL) { |
1729 | kfree(portp->tx.buf); |
1730 | portp->tx.buf = (char *) NULL; |
1731 | portp->tx.head = (char *) NULL; |
1732 | portp->tx.tail = (char *) NULL; |
1733 | } |
1734 | portp->tty = (struct tty_struct *) NULL; |
1735 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
1736 | portp->refcount = 0; |
1737 | wake_up_interruptible(&portp->open_wait); |
1738 | } |
1739 | |
1740 | /*****************************************************************************/ |
1741 | |
1742 | static void stl_flushbuffer(struct tty_struct *tty) |
1743 | { |
1744 | stlport_t *portp; |
1745 | |
1746 | #ifdef DEBUG |
1747 | printk("stl_flushbuffer(tty=%x)\n", (int) tty); |
1748 | #endif |
1749 | |
1750 | if (tty == (struct tty_struct *) NULL) |
1751 | return; |
1752 | portp = tty->driver_data; |
1753 | if (portp == (stlport_t *) NULL) |
1754 | return; |
1755 | |
1756 | stl_flush(portp); |
1757 | tty_wakeup(tty); |
1758 | } |
1759 | |
1760 | /*****************************************************************************/ |
1761 | |
1762 | static void stl_breakctl(struct tty_struct *tty, int state) |
1763 | { |
1764 | stlport_t *portp; |
1765 | |
1766 | #ifdef DEBUG |
1767 | printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state); |
1768 | #endif |
1769 | |
1770 | if (tty == (struct tty_struct *) NULL) |
1771 | return; |
1772 | portp = tty->driver_data; |
1773 | if (portp == (stlport_t *) NULL) |
1774 | return; |
1775 | |
1776 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); |
1777 | } |
1778 | |
1779 | /*****************************************************************************/ |
1780 | |
1781 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) |
1782 | { |
1783 | stlport_t *portp; |
1784 | unsigned long tend; |
1785 | |
1786 | #ifdef DEBUG |
1787 | printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout); |
1788 | #endif |
1789 | |
1790 | if (tty == (struct tty_struct *) NULL) |
1791 | return; |
1792 | portp = tty->driver_data; |
1793 | if (portp == (stlport_t *) NULL) |
1794 | return; |
1795 | |
1796 | if (timeout == 0) |
1797 | timeout = HZ; |
1798 | tend = jiffies + timeout; |
1799 | |
1800 | while (stl_datastate(portp)) { |
1801 | if (signal_pending(current)) |
1802 | break; |
1803 | msleep_interruptible(20); |
1804 | if (time_after_eq(jiffies, tend)) |
1805 | break; |
1806 | } |
1807 | } |
1808 | |
1809 | /*****************************************************************************/ |
1810 | |
1811 | static void stl_sendxchar(struct tty_struct *tty, char ch) |
1812 | { |
1813 | stlport_t *portp; |
1814 | |
1815 | #ifdef DEBUG |
1816 | printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch); |
1817 | #endif |
1818 | |
1819 | if (tty == (struct tty_struct *) NULL) |
1820 | return; |
1821 | portp = tty->driver_data; |
1822 | if (portp == (stlport_t *) NULL) |
1823 | return; |
1824 | |
1825 | if (ch == STOP_CHAR(tty)) |
1826 | stl_sendflow(portp, 0); |
1827 | else if (ch == START_CHAR(tty)) |
1828 | stl_sendflow(portp, 1); |
1829 | else |
1830 | stl_putchar(tty, ch); |
1831 | } |
1832 | |
1833 | /*****************************************************************************/ |
1834 | |
1835 | #define MAXLINE 80 |
1836 | |
1837 | /* |
1838 | * Format info for a specified port. The line is deliberately limited |
1839 | * to 80 characters. (If it is too long it will be truncated, if too |
1840 | * short then padded with spaces). |
1841 | */ |
1842 | |
1843 | static int stl_portinfo(stlport_t *portp, int portnr, char *pos) |
1844 | { |
1845 | char *sp; |
1846 | int sigs, cnt; |
1847 | |
1848 | sp = pos; |
1849 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", |
1850 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", |
1851 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); |
1852 | |
1853 | if (portp->stats.rxframing) |
1854 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); |
1855 | if (portp->stats.rxparity) |
1856 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); |
1857 | if (portp->stats.rxbreaks) |
1858 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); |
1859 | if (portp->stats.rxoverrun) |
1860 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); |
1861 | |
1862 | sigs = stl_getsignals(portp); |
1863 | cnt = sprintf(sp, "%s%s%s%s%s ", |
1864 | (sigs & TIOCM_RTS) ? "|RTS" : "", |
1865 | (sigs & TIOCM_CTS) ? "|CTS" : "", |
1866 | (sigs & TIOCM_DTR) ? "|DTR" : "", |
1867 | (sigs & TIOCM_CD) ? "|DCD" : "", |
1868 | (sigs & TIOCM_DSR) ? "|DSR" : ""); |
1869 | *sp = ' '; |
1870 | sp += cnt; |
1871 | |
1872 | for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) |
1873 | *sp++ = ' '; |
1874 | if (cnt >= MAXLINE) |
1875 | pos[(MAXLINE - 2)] = '+'; |
1876 | pos[(MAXLINE - 1)] = '\n'; |
1877 | |
1878 | return(MAXLINE); |
1879 | } |
1880 | |
1881 | /*****************************************************************************/ |
1882 | |
1883 | /* |
1884 | * Port info, read from the /proc file system. |
1885 | */ |
1886 | |
1887 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) |
1888 | { |
1889 | stlbrd_t *brdp; |
1890 | stlpanel_t *panelp; |
1891 | stlport_t *portp; |
1892 | int brdnr, panelnr, portnr, totalport; |
1893 | int curoff, maxoff; |
1894 | char *pos; |
1895 | |
1896 | #ifdef DEBUG |
1897 | printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x," |
1898 | "data=%x\n", (int) page, (int) start, (int) off, count, |
1899 | (int) eof, (int) data); |
1900 | #endif |
1901 | |
1902 | pos = page; |
1903 | totalport = 0; |
1904 | curoff = 0; |
1905 | |
1906 | if (off == 0) { |
1907 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, |
1908 | stl_drvversion); |
1909 | while (pos < (page + MAXLINE - 1)) |
1910 | *pos++ = ' '; |
1911 | *pos++ = '\n'; |
1912 | } |
1913 | curoff = MAXLINE; |
1914 | |
1915 | /* |
1916 | * We scan through for each board, panel and port. The offset is |
1917 | * calculated on the fly, and irrelevant ports are skipped. |
1918 | */ |
1919 | for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { |
1920 | brdp = stl_brds[brdnr]; |
1921 | if (brdp == (stlbrd_t *) NULL) |
1922 | continue; |
1923 | if (brdp->state == 0) |
1924 | continue; |
1925 | |
1926 | maxoff = curoff + (brdp->nrports * MAXLINE); |
1927 | if (off >= maxoff) { |
1928 | curoff = maxoff; |
1929 | continue; |
1930 | } |
1931 | |
1932 | totalport = brdnr * STL_MAXPORTS; |
1933 | for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { |
1934 | panelp = brdp->panels[panelnr]; |
1935 | if (panelp == (stlpanel_t *) NULL) |
1936 | continue; |
1937 | |
1938 | maxoff = curoff + (panelp->nrports * MAXLINE); |
1939 | if (off >= maxoff) { |
1940 | curoff = maxoff; |
1941 | totalport += panelp->nrports; |
1942 | continue; |
1943 | } |
1944 | |
1945 | for (portnr = 0; (portnr < panelp->nrports); portnr++, |
1946 | totalport++) { |
1947 | portp = panelp->ports[portnr]; |
1948 | if (portp == (stlport_t *) NULL) |
1949 | continue; |
1950 | if (off >= (curoff += MAXLINE)) |
1951 | continue; |
1952 | if ((pos - page + MAXLINE) > count) |
1953 | goto stl_readdone; |
1954 | pos += stl_portinfo(portp, totalport, pos); |
1955 | } |
1956 | } |
1957 | } |
1958 | |
1959 | *eof = 1; |
1960 | |
1961 | stl_readdone: |
1962 | *start = page; |
1963 | return(pos - page); |
1964 | } |
1965 | |
1966 | /*****************************************************************************/ |
1967 | |
1968 | /* |
1969 | * All board interrupts are vectored through here first. This code then |
1970 | * calls off to the approrpriate board interrupt handlers. |
1971 | */ |
1972 | |
1973 | static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs) |
1974 | { |
1975 | stlbrd_t *brdp = (stlbrd_t *) dev_id; |
1976 | |
1977 | #ifdef DEBUG |
1978 | printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq, |
1979 | (int) regs); |
1980 | #endif |
1981 | |
1982 | return IRQ_RETVAL((* brdp->isr)(brdp)); |
1983 | } |
1984 | |
1985 | /*****************************************************************************/ |
1986 | |
1987 | /* |
1988 | * Interrupt service routine for EasyIO board types. |
1989 | */ |
1990 | |
1991 | static int stl_eiointr(stlbrd_t *brdp) |
1992 | { |
1993 | stlpanel_t *panelp; |
1994 | unsigned int iobase; |
1995 | int handled = 0; |
1996 | |
1997 | panelp = brdp->panels[0]; |
1998 | iobase = panelp->iobase; |
1999 | while (inb(brdp->iostatus) & EIO_INTRPEND) { |
2000 | handled = 1; |
2001 | (* panelp->isr)(panelp, iobase); |
2002 | } |
2003 | return handled; |
2004 | } |
2005 | |
2006 | /*****************************************************************************/ |
2007 | |
2008 | /* |
2009 | * Interrupt service routine for ECH-AT board types. |
2010 | */ |
2011 | |
2012 | static int stl_echatintr(stlbrd_t *brdp) |
2013 | { |
2014 | stlpanel_t *panelp; |
2015 | unsigned int ioaddr; |
2016 | int bnknr; |
2017 | int handled = 0; |
2018 | |
2019 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
2020 | |
2021 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
2022 | handled = 1; |
2023 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
2024 | ioaddr = brdp->bnkstataddr[bnknr]; |
2025 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
2026 | panelp = brdp->bnk2panel[bnknr]; |
2027 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
2028 | } |
2029 | } |
2030 | } |
2031 | |
2032 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
2033 | |
2034 | return handled; |
2035 | } |
2036 | |
2037 | /*****************************************************************************/ |
2038 | |
2039 | /* |
2040 | * Interrupt service routine for ECH-MCA board types. |
2041 | */ |
2042 | |
2043 | static int stl_echmcaintr(stlbrd_t *brdp) |
2044 | { |
2045 | stlpanel_t *panelp; |
2046 | unsigned int ioaddr; |
2047 | int bnknr; |
2048 | int handled = 0; |
2049 | |
2050 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
2051 | handled = 1; |
2052 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
2053 | ioaddr = brdp->bnkstataddr[bnknr]; |
2054 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
2055 | panelp = brdp->bnk2panel[bnknr]; |
2056 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
2057 | } |
2058 | } |
2059 | } |
2060 | return handled; |
2061 | } |
2062 | |
2063 | /*****************************************************************************/ |
2064 | |
2065 | /* |
2066 | * Interrupt service routine for ECH-PCI board types. |
2067 | */ |
2068 | |
2069 | static int stl_echpciintr(stlbrd_t *brdp) |
2070 | { |
2071 | stlpanel_t *panelp; |
2072 | unsigned int ioaddr; |
2073 | int bnknr, recheck; |
2074 | int handled = 0; |
2075 | |
2076 | while (1) { |
2077 | recheck = 0; |
2078 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
2079 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); |
2080 | ioaddr = brdp->bnkstataddr[bnknr]; |
2081 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
2082 | panelp = brdp->bnk2panel[bnknr]; |
2083 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
2084 | recheck++; |
2085 | handled = 1; |
2086 | } |
2087 | } |
2088 | if (! recheck) |
2089 | break; |
2090 | } |
2091 | return handled; |
2092 | } |
2093 | |
2094 | /*****************************************************************************/ |
2095 | |
2096 | /* |
2097 | * Interrupt service routine for ECH-8/64-PCI board types. |
2098 | */ |
2099 | |
2100 | static int stl_echpci64intr(stlbrd_t *brdp) |
2101 | { |
2102 | stlpanel_t *panelp; |
2103 | unsigned int ioaddr; |
2104 | int bnknr; |
2105 | int handled = 0; |
2106 | |
2107 | while (inb(brdp->ioctrl) & 0x1) { |
2108 | handled = 1; |
2109 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
2110 | ioaddr = brdp->bnkstataddr[bnknr]; |
2111 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
2112 | panelp = brdp->bnk2panel[bnknr]; |
2113 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
2114 | } |
2115 | } |
2116 | } |
2117 | |
2118 | return handled; |
2119 | } |
2120 | |
2121 | /*****************************************************************************/ |
2122 | |
2123 | /* |
2124 | * Service an off-level request for some channel. |
2125 | */ |
2126 | static void stl_offintr(void *private) |
2127 | { |
2128 | stlport_t *portp; |
2129 | struct tty_struct *tty; |
2130 | unsigned int oldsigs; |
2131 | |
2132 | portp = private; |
2133 | |
2134 | #ifdef DEBUG |
2135 | printk("stl_offintr(portp=%x)\n", (int) portp); |
2136 | #endif |
2137 | |
2138 | if (portp == (stlport_t *) NULL) |
2139 | return; |
2140 | |
2141 | tty = portp->tty; |
2142 | if (tty == (struct tty_struct *) NULL) |
2143 | return; |
2144 | |
2145 | lock_kernel(); |
2146 | if (test_bit(ASYI_TXLOW, &portp->istate)) { |
2147 | tty_wakeup(tty); |
2148 | } |
2149 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { |
2150 | clear_bit(ASYI_DCDCHANGE, &portp->istate); |
2151 | oldsigs = portp->sigs; |
2152 | portp->sigs = stl_getsignals(portp); |
2153 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) |
2154 | wake_up_interruptible(&portp->open_wait); |
2155 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { |
2156 | if (portp->flags & ASYNC_CHECK_CD) |
2157 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
2158 | } |
2159 | } |
2160 | unlock_kernel(); |
2161 | } |
2162 | |
2163 | /*****************************************************************************/ |
2164 | |
2165 | /* |
2166 | * Initialize all the ports on a panel. |
2167 | */ |
2168 | |
2169 | static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp) |
2170 | { |
2171 | stlport_t *portp; |
2172 | int chipmask, i; |
2173 | |
2174 | #ifdef DEBUG |
2175 | printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); |
2176 | #endif |
2177 | |
2178 | chipmask = stl_panelinit(brdp, panelp); |
2179 | |
2180 | /* |
2181 | * All UART's are initialized (if found!). Now go through and setup |
2182 | * each ports data structures. |
2183 | */ |
2184 | for (i = 0; (i < panelp->nrports); i++) { |
2185 | portp = (stlport_t *) stl_memalloc(sizeof(stlport_t)); |
2186 | if (portp == (stlport_t *) NULL) { |
2187 | printk("STALLION: failed to allocate memory " |
2188 | "(size=%d)\n", sizeof(stlport_t)); |
2189 | break; |
2190 | } |
2191 | memset(portp, 0, sizeof(stlport_t)); |
2192 | |
2193 | portp->magic = STL_PORTMAGIC; |
2194 | portp->portnr = i; |
2195 | portp->brdnr = panelp->brdnr; |
2196 | portp->panelnr = panelp->panelnr; |
2197 | portp->uartp = panelp->uartp; |
2198 | portp->clk = brdp->clk; |
2199 | portp->baud_base = STL_BAUDBASE; |
2200 | portp->close_delay = STL_CLOSEDELAY; |
2201 | portp->closing_wait = 30 * HZ; |
2202 | INIT_WORK(&portp->tqueue, stl_offintr, portp); |
2203 | init_waitqueue_head(&portp->open_wait); |
2204 | init_waitqueue_head(&portp->close_wait); |
2205 | portp->stats.brd = portp->brdnr; |
2206 | portp->stats.panel = portp->panelnr; |
2207 | portp->stats.port = portp->portnr; |
2208 | panelp->ports[i] = portp; |
2209 | stl_portinit(brdp, panelp, portp); |
2210 | } |
2211 | |
2212 | return(0); |
2213 | } |
2214 | |
2215 | /*****************************************************************************/ |
2216 | |
2217 | /* |
2218 | * Try to find and initialize an EasyIO board. |
2219 | */ |
2220 | |
2221 | static inline int stl_initeio(stlbrd_t *brdp) |
2222 | { |
2223 | stlpanel_t *panelp; |
2224 | unsigned int status; |
2225 | char *name; |
2226 | int rc; |
2227 | |
2228 | #ifdef DEBUG |
2229 | printk("stl_initeio(brdp=%x)\n", (int) brdp); |
2230 | #endif |
2231 | |
2232 | brdp->ioctrl = brdp->ioaddr1 + 1; |
2233 | brdp->iostatus = brdp->ioaddr1 + 2; |
2234 | |
2235 | status = inb(brdp->iostatus); |
2236 | if ((status & EIO_IDBITMASK) == EIO_MK3) |
2237 | brdp->ioctrl++; |
2238 | |
2239 | /* |
2240 | * Handle board specific stuff now. The real difference is PCI |
2241 | * or not PCI. |
2242 | */ |
2243 | if (brdp->brdtype == BRD_EASYIOPCI) { |
2244 | brdp->iosize1 = 0x80; |
2245 | brdp->iosize2 = 0x80; |
2246 | name = "serial(EIO-PCI)"; |
2247 | outb(0x41, (brdp->ioaddr2 + 0x4c)); |
2248 | } else { |
2249 | brdp->iosize1 = 8; |
2250 | name = "serial(EIO)"; |
2251 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
2252 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
2253 | printk("STALLION: invalid irq=%d for brd=%d\n", |
2254 | brdp->irq, brdp->brdnr); |
2255 | return(-EINVAL); |
2256 | } |
2257 | outb((stl_vecmap[brdp->irq] | EIO_0WS | |
2258 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), |
2259 | brdp->ioctrl); |
2260 | } |
2261 | |
2262 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
2263 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
2264 | "%x conflicts with another device\n", brdp->brdnr, |
2265 | brdp->ioaddr1); |
2266 | return(-EBUSY); |
2267 | } |
2268 | |
2269 | if (brdp->iosize2 > 0) |
2270 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
2271 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
2272 | "address %x conflicts with another device\n", |
2273 | brdp->brdnr, brdp->ioaddr2); |
2274 | printk(KERN_WARNING "STALLION: Warning, also " |
2275 | "releasing board %d I/O address %x \n", |
2276 | brdp->brdnr, brdp->ioaddr1); |
2277 | release_region(brdp->ioaddr1, brdp->iosize1); |
2278 | return(-EBUSY); |
2279 | } |
2280 | |
2281 | /* |
2282 | * Everything looks OK, so let's go ahead and probe for the hardware. |
2283 | */ |
2284 | brdp->clk = CD1400_CLK; |
2285 | brdp->isr = stl_eiointr; |
2286 | |
2287 | switch (status & EIO_IDBITMASK) { |
2288 | case EIO_8PORTM: |
2289 | brdp->clk = CD1400_CLK8M; |
2290 | /* fall thru */ |
2291 | case EIO_8PORTRS: |
2292 | case EIO_8PORTDI: |
2293 | brdp->nrports = 8; |
2294 | break; |
2295 | case EIO_4PORTRS: |
2296 | brdp->nrports = 4; |
2297 | break; |
2298 | case EIO_MK3: |
2299 | switch (status & EIO_BRDMASK) { |
2300 | case ID_BRD4: |
2301 | brdp->nrports = 4; |
2302 | break; |
2303 | case ID_BRD8: |
2304 | brdp->nrports = 8; |
2305 | break; |
2306 | case ID_BRD16: |
2307 | brdp->nrports = 16; |
2308 | break; |
2309 | default: |
2310 | return(-ENODEV); |
2311 | } |
2312 | break; |
2313 | default: |
2314 | return(-ENODEV); |
2315 | } |
2316 | |
2317 | /* |
2318 | * We have verified that the board is actually present, so now we |
2319 | * can complete the setup. |
2320 | */ |
2321 | |
2322 | panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t)); |
2323 | if (panelp == (stlpanel_t *) NULL) { |
2324 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
2325 | "(size=%d)\n", sizeof(stlpanel_t)); |
2326 | return(-ENOMEM); |
2327 | } |
2328 | memset(panelp, 0, sizeof(stlpanel_t)); |
2329 | |
2330 | panelp->magic = STL_PANELMAGIC; |
2331 | panelp->brdnr = brdp->brdnr; |
2332 | panelp->panelnr = 0; |
2333 | panelp->nrports = brdp->nrports; |
2334 | panelp->iobase = brdp->ioaddr1; |
2335 | panelp->hwid = status; |
2336 | if ((status & EIO_IDBITMASK) == EIO_MK3) { |
2337 | panelp->uartp = (void *) &stl_sc26198uart; |
2338 | panelp->isr = stl_sc26198intr; |
2339 | } else { |
2340 | panelp->uartp = (void *) &stl_cd1400uart; |
2341 | panelp->isr = stl_cd1400eiointr; |
2342 | } |
2343 | |
2344 | brdp->panels[0] = panelp; |
2345 | brdp->nrpanels = 1; |
2346 | brdp->state |= BRD_FOUND; |
2347 | brdp->hwid = status; |
2348 | if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) { |
2349 | printk("STALLION: failed to register interrupt " |
2350 | "routine for %s irq=%d\n", name, brdp->irq); |
2351 | rc = -ENODEV; |
2352 | } else { |
2353 | rc = 0; |
2354 | } |
2355 | return(rc); |
2356 | } |
2357 | |
2358 | /*****************************************************************************/ |
2359 | |
2360 | /* |
2361 | * Try to find an ECH board and initialize it. This code is capable of |
2362 | * dealing with all types of ECH board. |
2363 | */ |
2364 | |
2365 | static inline int stl_initech(stlbrd_t *brdp) |
2366 | { |
2367 | stlpanel_t *panelp; |
2368 | unsigned int status, nxtid, ioaddr, conflict; |
2369 | int panelnr, banknr, i; |
2370 | char *name; |
2371 | |
2372 | #ifdef DEBUG |
2373 | printk("stl_initech(brdp=%x)\n", (int) brdp); |
2374 | #endif |
2375 | |
2376 | status = 0; |
2377 | conflict = 0; |
2378 | |
2379 | /* |
2380 | * Set up the initial board register contents for boards. This varies a |
2381 | * bit between the different board types. So we need to handle each |
2382 | * separately. Also do a check that the supplied IRQ is good. |
2383 | */ |
2384 | switch (brdp->brdtype) { |
2385 | |
2386 | case BRD_ECH: |
2387 | brdp->isr = stl_echatintr; |
2388 | brdp->ioctrl = brdp->ioaddr1 + 1; |
2389 | brdp->iostatus = brdp->ioaddr1 + 1; |
2390 | status = inb(brdp->iostatus); |
2391 | if ((status & ECH_IDBITMASK) != ECH_ID) |
2392 | return(-ENODEV); |
2393 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
2394 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
2395 | printk("STALLION: invalid irq=%d for brd=%d\n", |
2396 | brdp->irq, brdp->brdnr); |
2397 | return(-EINVAL); |
2398 | } |
2399 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); |
2400 | status |= (stl_vecmap[brdp->irq] << 1); |
2401 | outb((status | ECH_BRDRESET), brdp->ioaddr1); |
2402 | brdp->ioctrlval = ECH_INTENABLE | |
2403 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); |
2404 | for (i = 0; (i < 10); i++) |
2405 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
2406 | brdp->iosize1 = 2; |
2407 | brdp->iosize2 = 32; |
2408 | name = "serial(EC8/32)"; |
2409 | outb(status, brdp->ioaddr1); |
2410 | break; |
2411 | |
2412 | case BRD_ECHMC: |
2413 | brdp->isr = stl_echmcaintr; |
2414 | brdp->ioctrl = brdp->ioaddr1 + 0x20; |
2415 | brdp->iostatus = brdp->ioctrl; |
2416 | status = inb(brdp->iostatus); |
2417 | if ((status & ECH_IDBITMASK) != ECH_ID) |
2418 | return(-ENODEV); |
2419 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
2420 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
2421 | printk("STALLION: invalid irq=%d for brd=%d\n", |
2422 | brdp->irq, brdp->brdnr); |
2423 | return(-EINVAL); |
2424 | } |
2425 | outb(ECHMC_BRDRESET, brdp->ioctrl); |
2426 | outb(ECHMC_INTENABLE, brdp->ioctrl); |
2427 | brdp->iosize1 = 64; |
2428 | name = "serial(EC8/32-MC)"; |
2429 | break; |
2430 | |
2431 | case BRD_ECHPCI: |
2432 | brdp->isr = stl_echpciintr; |
2433 | brdp->ioctrl = brdp->ioaddr1 + 2; |
2434 | brdp->iosize1 = 4; |
2435 | brdp->iosize2 = 8; |
2436 | name = "serial(EC8/32-PCI)"; |
2437 | break; |
2438 | |
2439 | case BRD_ECH64PCI: |
2440 | brdp->isr = stl_echpci64intr; |
2441 | brdp->ioctrl = brdp->ioaddr2 + 0x40; |
2442 | outb(0x43, (brdp->ioaddr1 + 0x4c)); |
2443 | brdp->iosize1 = 0x80; |
2444 | brdp->iosize2 = 0x80; |
2445 | name = "serial(EC8/64-PCI)"; |
2446 | break; |
2447 | |
2448 | default: |
2449 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); |
2450 | return(-EINVAL); |
2451 | break; |
2452 | } |
2453 | |
2454 | /* |
2455 | * Check boards for possible IO address conflicts and return fail status |
2456 | * if an IO conflict found. |
2457 | */ |
2458 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
2459 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
2460 | "%x conflicts with another device\n", brdp->brdnr, |
2461 | brdp->ioaddr1); |
2462 | return(-EBUSY); |
2463 | } |
2464 | |
2465 | if (brdp->iosize2 > 0) |
2466 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
2467 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
2468 | "address %x conflicts with another device\n", |
2469 | brdp->brdnr, brdp->ioaddr2); |
2470 | printk(KERN_WARNING "STALLION: Warning, also " |
2471 | "releasing board %d I/O address %x \n", |
2472 | brdp->brdnr, brdp->ioaddr1); |
2473 | release_region(brdp->ioaddr1, brdp->iosize1); |
2474 | return(-EBUSY); |
2475 | } |
2476 | |
2477 | /* |
2478 | * Scan through the secondary io address space looking for panels. |
2479 | * As we find'em allocate and initialize panel structures for each. |
2480 | */ |
2481 | brdp->clk = CD1400_CLK; |
2482 | brdp->hwid = status; |
2483 | |
2484 | ioaddr = brdp->ioaddr2; |
2485 | banknr = 0; |
2486 | panelnr = 0; |
2487 | nxtid = 0; |
2488 | |
2489 | for (i = 0; (i < STL_MAXPANELS); i++) { |
2490 | if (brdp->brdtype == BRD_ECHPCI) { |
2491 | outb(nxtid, brdp->ioctrl); |
2492 | ioaddr = brdp->ioaddr2; |
2493 | } |
2494 | status = inb(ioaddr + ECH_PNLSTATUS); |
2495 | if ((status & ECH_PNLIDMASK) != nxtid) |
2496 | break; |
2497 | panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t)); |
2498 | if (panelp == (stlpanel_t *) NULL) { |
2499 | printk("STALLION: failed to allocate memory " |
2500 | "(size=%d)\n", sizeof(stlpanel_t)); |
2501 | break; |
2502 | } |
2503 | memset(panelp, 0, sizeof(stlpanel_t)); |
2504 | panelp->magic = STL_PANELMAGIC; |
2505 | panelp->brdnr = brdp->brdnr; |
2506 | panelp->panelnr = panelnr; |
2507 | panelp->iobase = ioaddr; |
2508 | panelp->pagenr = nxtid; |
2509 | panelp->hwid = status; |
2510 | brdp->bnk2panel[banknr] = panelp; |
2511 | brdp->bnkpageaddr[banknr] = nxtid; |
2512 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; |
2513 | |
2514 | if (status & ECH_PNLXPID) { |
2515 | panelp->uartp = (void *) &stl_sc26198uart; |
2516 | panelp->isr = stl_sc26198intr; |
2517 | if (status & ECH_PNL16PORT) { |
2518 | panelp->nrports = 16; |
2519 | brdp->bnk2panel[banknr] = panelp; |
2520 | brdp->bnkpageaddr[banknr] = nxtid; |
2521 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + |
2522 | ECH_PNLSTATUS; |
2523 | } else { |
2524 | panelp->nrports = 8; |
2525 | } |
2526 | } else { |
2527 | panelp->uartp = (void *) &stl_cd1400uart; |
2528 | panelp->isr = stl_cd1400echintr; |
2529 | if (status & ECH_PNL16PORT) { |
2530 | panelp->nrports = 16; |
2531 | panelp->ackmask = 0x80; |
2532 | if (brdp->brdtype != BRD_ECHPCI) |
2533 | ioaddr += EREG_BANKSIZE; |
2534 | brdp->bnk2panel[banknr] = panelp; |
2535 | brdp->bnkpageaddr[banknr] = ++nxtid; |
2536 | brdp->bnkstataddr[banknr++] = ioaddr + |
2537 | ECH_PNLSTATUS; |
2538 | } else { |
2539 | panelp->nrports = 8; |
2540 | panelp->ackmask = 0xc0; |
2541 | } |
2542 | } |
2543 | |
2544 | nxtid++; |
2545 | ioaddr += EREG_BANKSIZE; |
2546 | brdp->nrports += panelp->nrports; |
2547 | brdp->panels[panelnr++] = panelp; |
2548 | if ((brdp->brdtype != BRD_ECHPCI) && |
2549 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) |
2550 | break; |
2551 | } |
2552 | |
2553 | brdp->nrpanels = panelnr; |
2554 | brdp->nrbnks = banknr; |
2555 | if (brdp->brdtype == BRD_ECH) |
2556 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
2557 | |
2558 | brdp->state |= BRD_FOUND; |
2559 | if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) { |
2560 | printk("STALLION: failed to register interrupt " |
2561 | "routine for %s irq=%d\n", name, brdp->irq); |
2562 | i = -ENODEV; |
2563 | } else { |
2564 | i = 0; |
2565 | } |
2566 | |
2567 | return(i); |
2568 | } |
2569 | |
2570 | /*****************************************************************************/ |
2571 | |
2572 | /* |
2573 | * Initialize and configure the specified board. |
2574 | * Scan through all the boards in the configuration and see what we |
2575 | * can find. Handle EIO and the ECH boards a little differently here |
2576 | * since the initial search and setup is very different. |
2577 | */ |
2578 | |
2579 | static int __init stl_brdinit(stlbrd_t *brdp) |
2580 | { |
2581 | int i; |
2582 | |
2583 | #ifdef DEBUG |
2584 | printk("stl_brdinit(brdp=%x)\n", (int) brdp); |
2585 | #endif |
2586 | |
2587 | switch (brdp->brdtype) { |
2588 | case BRD_EASYIO: |
2589 | case BRD_EASYIOPCI: |
2590 | stl_initeio(brdp); |
2591 | break; |
2592 | case BRD_ECH: |
2593 | case BRD_ECHMC: |
2594 | case BRD_ECHPCI: |
2595 | case BRD_ECH64PCI: |
2596 | stl_initech(brdp); |
2597 | break; |
2598 | default: |
2599 | printk("STALLION: board=%d is unknown board type=%d\n", |
2600 | brdp->brdnr, brdp->brdtype); |
2601 | return(ENODEV); |
2602 | } |
2603 | |
2604 | stl_brds[brdp->brdnr] = brdp; |
2605 | if ((brdp->state & BRD_FOUND) == 0) { |
2606 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", |
2607 | stl_brdnames[brdp->brdtype], brdp->brdnr, |
2608 | brdp->ioaddr1, brdp->irq); |
2609 | return(ENODEV); |
2610 | } |
2611 | |
2612 | for (i = 0; (i < STL_MAXPANELS); i++) |
2613 | if (brdp->panels[i] != (stlpanel_t *) NULL) |
2614 | stl_initports(brdp, brdp->panels[i]); |
2615 | |
2616 | printk("STALLION: %s found, board=%d io=%x irq=%d " |
2617 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], |
2618 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, |
2619 | brdp->nrports); |
2620 | return(0); |
2621 | } |
2622 | |
2623 | /*****************************************************************************/ |
2624 | |
2625 | /* |
2626 | * Find the next available board number that is free. |
2627 | */ |
2628 | |
2629 | static inline int stl_getbrdnr(void) |
2630 | { |
2631 | int i; |
2632 | |
2633 | for (i = 0; (i < STL_MAXBRDS); i++) { |
2634 | if (stl_brds[i] == (stlbrd_t *) NULL) { |
2635 | if (i >= stl_nrbrds) |
2636 | stl_nrbrds = i + 1; |
2637 | return(i); |
2638 | } |
2639 | } |
2640 | return(-1); |
2641 | } |
2642 | |
2643 | /*****************************************************************************/ |
2644 | |
2645 | #ifdef CONFIG_PCI |
2646 | |
2647 | /* |
2648 | * We have a Stallion board. Allocate a board structure and |
2649 | * initialize it. Read its IO and IRQ resources from PCI |
2650 | * configuration space. |
2651 | */ |
2652 | |
2653 | static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp) |
2654 | { |
2655 | stlbrd_t *brdp; |
2656 | |
2657 | #ifdef DEBUG |
2658 | printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, |
2659 | devp->bus->number, devp->devfn); |
2660 | #endif |
2661 | |
2662 | if (pci_enable_device(devp)) |
2663 | return(-EIO); |
2664 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) |
2665 | return(-ENOMEM); |
2666 | if ((brdp->brdnr = stl_getbrdnr()) < 0) { |
2667 | printk("STALLION: too many boards found, " |
2668 | "maximum supported %d\n", STL_MAXBRDS); |
2669 | return(0); |
2670 | } |
2671 | brdp->brdtype = brdtype; |
2672 | |
2673 | /* |
2674 | * Different Stallion boards use the BAR registers in different ways, |
2675 | * so set up io addresses based on board type. |
2676 | */ |
2677 | #ifdef DEBUG |
2678 | printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__, |
2679 | pci_resource_start(devp, 0), pci_resource_start(devp, 1), |
2680 | pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq); |
2681 | #endif |
2682 | |
2683 | /* |
2684 | * We have all resources from the board, so let's setup the actual |
2685 | * board structure now. |
2686 | */ |
2687 | switch (brdtype) { |
2688 | case BRD_ECHPCI: |
2689 | brdp->ioaddr2 = pci_resource_start(devp, 0); |
2690 | brdp->ioaddr1 = pci_resource_start(devp, 1); |
2691 | break; |
2692 | case BRD_ECH64PCI: |
2693 | brdp->ioaddr2 = pci_resource_start(devp, 2); |
2694 | brdp->ioaddr1 = pci_resource_start(devp, 1); |
2695 | break; |
2696 | case BRD_EASYIOPCI: |
2697 | brdp->ioaddr1 = pci_resource_start(devp, 2); |
2698 | brdp->ioaddr2 = pci_resource_start(devp, 1); |
2699 | break; |
2700 | default: |
2701 | printk("STALLION: unknown PCI board type=%d\n", brdtype); |
2702 | break; |
2703 | } |
2704 | |
2705 | brdp->irq = devp->irq; |
2706 | stl_brdinit(brdp); |
2707 | |
2708 | return(0); |
2709 | } |
2710 | |
2711 | /*****************************************************************************/ |
2712 | |
2713 | /* |
2714 | * Find all Stallion PCI boards that might be installed. Initialize each |
2715 | * one as it is found. |
2716 | */ |
2717 | |
2718 | |
2719 | static inline int stl_findpcibrds(void) |
2720 | { |
2721 | struct pci_dev *dev = NULL; |
2722 | int i, rc; |
2723 | |
2724 | #ifdef DEBUG |
2725 | printk("stl_findpcibrds()\n"); |
2726 | #endif |
2727 | |
2728 | for (i = 0; (i < stl_nrpcibrds); i++) |
2729 | while ((dev = pci_find_device(stl_pcibrds[i].vendid, |
2730 | stl_pcibrds[i].devid, dev))) { |
2731 | |
2732 | /* |
2733 | * Found a device on the PCI bus that has our vendor and |
2734 | * device ID. Need to check now that it is really us. |
2735 | */ |
2736 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
2737 | continue; |
2738 | |
2739 | rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev); |
2740 | if (rc) |
2741 | return(rc); |
2742 | } |
2743 | |
2744 | return(0); |
2745 | } |
2746 | |
2747 | #endif |
2748 | |
2749 | /*****************************************************************************/ |
2750 | |
2751 | /* |
2752 | * Scan through all the boards in the configuration and see what we |
2753 | * can find. Handle EIO and the ECH boards a little differently here |
2754 | * since the initial search and setup is too different. |
2755 | */ |
2756 | |
2757 | static inline int stl_initbrds(void) |
2758 | { |
2759 | stlbrd_t *brdp; |
2760 | stlconf_t *confp; |
2761 | int i; |
2762 | |
2763 | #ifdef DEBUG |
2764 | printk("stl_initbrds()\n"); |
2765 | #endif |
2766 | |
2767 | if (stl_nrbrds > STL_MAXBRDS) { |
2768 | printk("STALLION: too many boards in configuration table, " |
2769 | "truncating to %d\n", STL_MAXBRDS); |
2770 | stl_nrbrds = STL_MAXBRDS; |
2771 | } |
2772 | |
2773 | /* |
2774 | * Firstly scan the list of static boards configured. Allocate |
2775 | * resources and initialize the boards as found. |
2776 | */ |
2777 | for (i = 0; (i < stl_nrbrds); i++) { |
2778 | confp = &stl_brdconf[i]; |
2779 | stl_parsebrd(confp, stl_brdsp[i]); |
2780 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) |
2781 | return(-ENOMEM); |
2782 | brdp->brdnr = i; |
2783 | brdp->brdtype = confp->brdtype; |
2784 | brdp->ioaddr1 = confp->ioaddr1; |
2785 | brdp->ioaddr2 = confp->ioaddr2; |
2786 | brdp->irq = confp->irq; |
2787 | brdp->irqtype = confp->irqtype; |
2788 | stl_brdinit(brdp); |
2789 | } |
2790 | |
2791 | /* |
2792 | * Find any dynamically supported boards. That is via module load |
2793 | * line options or auto-detected on the PCI bus. |
2794 | */ |
2795 | stl_argbrds(); |
2796 | #ifdef CONFIG_PCI |
2797 | stl_findpcibrds(); |
2798 | #endif |
2799 | |
2800 | return(0); |
2801 | } |
2802 | |
2803 | /*****************************************************************************/ |
2804 | |
2805 | /* |
2806 | * Return the board stats structure to user app. |
2807 | */ |
2808 | |
2809 | static int stl_getbrdstats(combrd_t __user *bp) |
2810 | { |
2811 | stlbrd_t *brdp; |
2812 | stlpanel_t *panelp; |
2813 | int i; |
2814 | |
2815 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) |
2816 | return -EFAULT; |
2817 | if (stl_brdstats.brd >= STL_MAXBRDS) |
2818 | return(-ENODEV); |
2819 | brdp = stl_brds[stl_brdstats.brd]; |
2820 | if (brdp == (stlbrd_t *) NULL) |
2821 | return(-ENODEV); |
2822 | |
2823 | memset(&stl_brdstats, 0, sizeof(combrd_t)); |
2824 | stl_brdstats.brd = brdp->brdnr; |
2825 | stl_brdstats.type = brdp->brdtype; |
2826 | stl_brdstats.hwid = brdp->hwid; |
2827 | stl_brdstats.state = brdp->state; |
2828 | stl_brdstats.ioaddr = brdp->ioaddr1; |
2829 | stl_brdstats.ioaddr2 = brdp->ioaddr2; |
2830 | stl_brdstats.irq = brdp->irq; |
2831 | stl_brdstats.nrpanels = brdp->nrpanels; |
2832 | stl_brdstats.nrports = brdp->nrports; |
2833 | for (i = 0; (i < brdp->nrpanels); i++) { |
2834 | panelp = brdp->panels[i]; |
2835 | stl_brdstats.panels[i].panel = i; |
2836 | stl_brdstats.panels[i].hwid = panelp->hwid; |
2837 | stl_brdstats.panels[i].nrports = panelp->nrports; |
2838 | } |
2839 | |
2840 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; |
2841 | } |
2842 | |
2843 | /*****************************************************************************/ |
2844 | |
2845 | /* |
2846 | * Resolve the referenced port number into a port struct pointer. |
2847 | */ |
2848 | |
2849 | static stlport_t *stl_getport(int brdnr, int panelnr, int portnr) |
2850 | { |
2851 | stlbrd_t *brdp; |
2852 | stlpanel_t *panelp; |
2853 | |
2854 | if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) |
2855 | return((stlport_t *) NULL); |
2856 | brdp = stl_brds[brdnr]; |
2857 | if (brdp == (stlbrd_t *) NULL) |
2858 | return((stlport_t *) NULL); |
2859 | if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) |
2860 | return((stlport_t *) NULL); |
2861 | panelp = brdp->panels[panelnr]; |
2862 | if (panelp == (stlpanel_t *) NULL) |
2863 | return((stlport_t *) NULL); |
2864 | if ((portnr < 0) || (portnr >= panelp->nrports)) |
2865 | return((stlport_t *) NULL); |
2866 | return(panelp->ports[portnr]); |
2867 | } |
2868 | |
2869 | /*****************************************************************************/ |
2870 | |
2871 | /* |
2872 | * Return the port stats structure to user app. A NULL port struct |
2873 | * pointer passed in means that we need to find out from the app |
2874 | * what port to get stats for (used through board control device). |
2875 | */ |
2876 | |
2877 | static int stl_getportstats(stlport_t *portp, comstats_t __user *cp) |
2878 | { |
2879 | unsigned char *head, *tail; |
2880 | unsigned long flags; |
2881 | |
2882 | if (!portp) { |
2883 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
2884 | return -EFAULT; |
2885 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
2886 | stl_comstats.port); |
2887 | if (portp == (stlport_t *) NULL) |
2888 | return(-ENODEV); |
2889 | } |
2890 | |
2891 | portp->stats.state = portp->istate; |
2892 | portp->stats.flags = portp->flags; |
2893 | portp->stats.hwid = portp->hwid; |
2894 | |
2895 | portp->stats.ttystate = 0; |
2896 | portp->stats.cflags = 0; |
2897 | portp->stats.iflags = 0; |
2898 | portp->stats.oflags = 0; |
2899 | portp->stats.lflags = 0; |
2900 | portp->stats.rxbuffered = 0; |
2901 | |
2902 | save_flags(flags); |
2903 | cli(); |
2904 | if (portp->tty != (struct tty_struct *) NULL) { |
2905 | if (portp->tty->driver_data == portp) { |
2906 | portp->stats.ttystate = portp->tty->flags; |
2907 | portp->stats.rxbuffered = portp->tty->flip.count; |
2908 | if (portp->tty->termios != (struct termios *) NULL) { |
2909 | portp->stats.cflags = portp->tty->termios->c_cflag; |
2910 | portp->stats.iflags = portp->tty->termios->c_iflag; |
2911 | portp->stats.oflags = portp->tty->termios->c_oflag; |
2912 | portp->stats.lflags = portp->tty->termios->c_lflag; |
2913 | } |
2914 | } |
2915 | } |
2916 | restore_flags(flags); |
2917 | |
2918 | head = portp->tx.head; |
2919 | tail = portp->tx.tail; |
2920 | portp->stats.txbuffered = ((head >= tail) ? (head - tail) : |
2921 | (STL_TXBUFSIZE - (tail - head))); |
2922 | |
2923 | portp->stats.signals = (unsigned long) stl_getsignals(portp); |
2924 | |
2925 | return copy_to_user(cp, &portp->stats, |
2926 | sizeof(comstats_t)) ? -EFAULT : 0; |
2927 | } |
2928 | |
2929 | /*****************************************************************************/ |
2930 | |
2931 | /* |
2932 | * Clear the port stats structure. We also return it zeroed out... |
2933 | */ |
2934 | |
2935 | static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp) |
2936 | { |
2937 | if (!portp) { |
2938 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
2939 | return -EFAULT; |
2940 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
2941 | stl_comstats.port); |
2942 | if (portp == (stlport_t *) NULL) |
2943 | return(-ENODEV); |
2944 | } |
2945 | |
2946 | memset(&portp->stats, 0, sizeof(comstats_t)); |
2947 | portp->stats.brd = portp->brdnr; |
2948 | portp->stats.panel = portp->panelnr; |
2949 | portp->stats.port = portp->portnr; |
2950 | return copy_to_user(cp, &portp->stats, |
2951 | sizeof(comstats_t)) ? -EFAULT : 0; |
2952 | } |
2953 | |
2954 | /*****************************************************************************/ |
2955 | |
2956 | /* |
2957 | * Return the entire driver ports structure to a user app. |
2958 | */ |
2959 | |
2960 | static int stl_getportstruct(stlport_t __user *arg) |
2961 | { |
2962 | stlport_t *portp; |
2963 | |
2964 | if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t))) |
2965 | return -EFAULT; |
2966 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, |
2967 | stl_dummyport.portnr); |
2968 | if (!portp) |
2969 | return -ENODEV; |
2970 | return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0; |
2971 | } |
2972 | |
2973 | /*****************************************************************************/ |
2974 | |
2975 | /* |
2976 | * Return the entire driver board structure to a user app. |
2977 | */ |
2978 | |
2979 | static int stl_getbrdstruct(stlbrd_t __user *arg) |
2980 | { |
2981 | stlbrd_t *brdp; |
2982 | |
2983 | if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t))) |
2984 | return -EFAULT; |
2985 | if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) |
2986 | return -ENODEV; |
2987 | brdp = stl_brds[stl_dummybrd.brdnr]; |
2988 | if (!brdp) |
2989 | return(-ENODEV); |
2990 | return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0; |
2991 | } |
2992 | |
2993 | /*****************************************************************************/ |
2994 | |
2995 | /* |
2996 | * The "staliomem" device is also required to do some special operations |
2997 | * on the board and/or ports. In this driver it is mostly used for stats |
2998 | * collection. |
2999 | */ |
3000 | |
3001 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) |
3002 | { |
3003 | int brdnr, rc; |
3004 | void __user *argp = (void __user *)arg; |
3005 | |
3006 | #ifdef DEBUG |
3007 | printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, |
3008 | (int) fp, cmd, (int) arg); |
3009 | #endif |
3010 | |
3011 | brdnr = iminor(ip); |
3012 | if (brdnr >= STL_MAXBRDS) |
3013 | return(-ENODEV); |
3014 | rc = 0; |
3015 | |
3016 | switch (cmd) { |
3017 | case COM_GETPORTSTATS: |
3018 | rc = stl_getportstats(NULL, argp); |
3019 | break; |
3020 | case COM_CLRPORTSTATS: |
3021 | rc = stl_clrportstats(NULL, argp); |
3022 | break; |
3023 | case COM_GETBRDSTATS: |
3024 | rc = stl_getbrdstats(argp); |
3025 | break; |
3026 | case COM_READPORT: |
3027 | rc = stl_getportstruct(argp); |
3028 | break; |
3029 | case COM_READBOARD: |
3030 | rc = stl_getbrdstruct(argp); |
3031 | break; |
3032 | default: |
3033 | rc = -ENOIOCTLCMD; |
3034 | break; |
3035 | } |
3036 | |
3037 | return(rc); |
3038 | } |
3039 | |
3040 | static struct tty_operations stl_ops = { |
3041 | .open = stl_open, |
3042 | .close = stl_close, |
3043 | .write = stl_write, |
3044 | .put_char = stl_putchar, |
3045 | .flush_chars = stl_flushchars, |
3046 | .write_room = stl_writeroom, |
3047 | .chars_in_buffer = stl_charsinbuffer, |
3048 | .ioctl = stl_ioctl, |
3049 | .set_termios = stl_settermios, |
3050 | .throttle = stl_throttle, |
3051 | .unthrottle = stl_unthrottle, |
3052 | .stop = stl_stop, |
3053 | .start = stl_start, |
3054 | .hangup = stl_hangup, |
3055 | .flush_buffer = stl_flushbuffer, |
3056 | .break_ctl = stl_breakctl, |
3057 | .wait_until_sent = stl_waituntilsent, |
3058 | .send_xchar = stl_sendxchar, |
3059 | .read_proc = stl_readproc, |
3060 | .tiocmget = stl_tiocmget, |
3061 | .tiocmset = stl_tiocmset, |
3062 | }; |
3063 | |
3064 | /*****************************************************************************/ |
3065 | |
3066 | static int __init stl_init(void) |
3067 | { |
3068 | int i; |
3069 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); |
3070 | |
3071 | stl_initbrds(); |
3072 | |
3073 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
3074 | if (!stl_serial) |
3075 | return -1; |
3076 | |
3077 | /* |
3078 | * Allocate a temporary write buffer. |
3079 | */ |
3080 | stl_tmpwritebuf = (char *) stl_memalloc(STL_TXBUFSIZE); |
3081 | if (stl_tmpwritebuf == (char *) NULL) |
3082 | printk("STALLION: failed to allocate memory (size=%d)\n", |
3083 | STL_TXBUFSIZE); |
3084 | |
3085 | /* |
3086 | * Set up a character driver for per board stuff. This is mainly used |
3087 | * to do stats ioctls on the ports. |
3088 | */ |
3089 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) |
3090 | printk("STALLION: failed to register serial board device\n"); |
3091 | devfs_mk_dir("staliomem"); |
3092 | |
3093 | stallion_class = class_simple_create(THIS_MODULE, "staliomem"); |
3094 | for (i = 0; i < 4; i++) { |
3095 | devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i), |
3096 | S_IFCHR|S_IRUSR|S_IWUSR, |
3097 | "staliomem/%d", i); |
3098 | class_simple_device_add(stallion_class, MKDEV(STL_SIOMEMMAJOR, i), NULL, "staliomem%d", i); |
3099 | } |
3100 | |
3101 | stl_serial->owner = THIS_MODULE; |
3102 | stl_serial->driver_name = stl_drvname; |
3103 | stl_serial->name = "ttyE"; |
3104 | stl_serial->devfs_name = "tts/E"; |
3105 | stl_serial->major = STL_SERIALMAJOR; |
3106 | stl_serial->minor_start = 0; |
3107 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; |
3108 | stl_serial->subtype = SERIAL_TYPE_NORMAL; |
3109 | stl_serial->init_termios = stl_deftermios; |
3110 | stl_serial->flags = TTY_DRIVER_REAL_RAW; |
3111 | tty_set_operations(stl_serial, &stl_ops); |
3112 | |
3113 | if (tty_register_driver(stl_serial)) { |
3114 | put_tty_driver(stl_serial); |
3115 | printk("STALLION: failed to register serial driver\n"); |
3116 | return -1; |
3117 | } |
3118 | |
3119 | return(0); |
3120 | } |
3121 | |
3122 | /*****************************************************************************/ |
3123 | /* CD1400 HARDWARE FUNCTIONS */ |
3124 | /*****************************************************************************/ |
3125 | |
3126 | /* |
3127 | * These functions get/set/update the registers of the cd1400 UARTs. |
3128 | * Access to the cd1400 registers is via an address/data io port pair. |
3129 | * (Maybe should make this inline...) |
3130 | */ |
3131 | |
3132 | static int stl_cd1400getreg(stlport_t *portp, int regnr) |
3133 | { |
3134 | outb((regnr + portp->uartaddr), portp->ioaddr); |
3135 | return(inb(portp->ioaddr + EREG_DATA)); |
3136 | } |
3137 | |
3138 | static void stl_cd1400setreg(stlport_t *portp, int regnr, int value) |
3139 | { |
3140 | outb((regnr + portp->uartaddr), portp->ioaddr); |
3141 | outb(value, portp->ioaddr + EREG_DATA); |
3142 | } |
3143 | |
3144 | static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value) |
3145 | { |
3146 | outb((regnr + portp->uartaddr), portp->ioaddr); |
3147 | if (inb(portp->ioaddr + EREG_DATA) != value) { |
3148 | outb(value, portp->ioaddr + EREG_DATA); |
3149 | return(1); |
3150 | } |
3151 | return(0); |
3152 | } |
3153 | |
3154 | /*****************************************************************************/ |
3155 | |
3156 | /* |
3157 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
3158 | * these ports are on - since the port io registers are almost |
3159 | * identical when dealing with ports. |
3160 | */ |
3161 | |
3162 | static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp) |
3163 | { |
3164 | unsigned int gfrcr; |
3165 | int chipmask, i, j; |
3166 | int nrchips, uartaddr, ioaddr; |
3167 | |
3168 | #ifdef DEBUG |
3169 | printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); |
3170 | #endif |
3171 | |
3172 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
3173 | |
3174 | /* |
3175 | * Check that each chip is present and started up OK. |
3176 | */ |
3177 | chipmask = 0; |
3178 | nrchips = panelp->nrports / CD1400_PORTS; |
3179 | for (i = 0; (i < nrchips); i++) { |
3180 | if (brdp->brdtype == BRD_ECHPCI) { |
3181 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); |
3182 | ioaddr = panelp->iobase; |
3183 | } else { |
3184 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); |
3185 | } |
3186 | uartaddr = (i & 0x01) ? 0x080 : 0; |
3187 | outb((GFRCR + uartaddr), ioaddr); |
3188 | outb(0, (ioaddr + EREG_DATA)); |
3189 | outb((CCR + uartaddr), ioaddr); |
3190 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
3191 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
3192 | outb((GFRCR + uartaddr), ioaddr); |
3193 | for (j = 0; (j < CCR_MAXWAIT); j++) { |
3194 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) |
3195 | break; |
3196 | } |
3197 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { |
3198 | printk("STALLION: cd1400 not responding, " |
3199 | "brd=%d panel=%d chip=%d\n", |
3200 | panelp->brdnr, panelp->panelnr, i); |
3201 | continue; |
3202 | } |
3203 | chipmask |= (0x1 << i); |
3204 | outb((PPR + uartaddr), ioaddr); |
3205 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); |
3206 | } |
3207 | |
3208 | BRDDISABLE(panelp->brdnr); |
3209 | return(chipmask); |
3210 | } |
3211 | |
3212 | /*****************************************************************************/ |
3213 | |
3214 | /* |
3215 | * Initialize hardware specific port registers. |
3216 | */ |
3217 | |
3218 | static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) |
3219 | { |
3220 | #ifdef DEBUG |
3221 | printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n", |
3222 | (int) brdp, (int) panelp, (int) portp); |
3223 | #endif |
3224 | |
3225 | if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || |
3226 | (portp == (stlport_t *) NULL)) |
3227 | return; |
3228 | |
3229 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
3230 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); |
3231 | portp->uartaddr = (portp->portnr & 0x04) << 5; |
3232 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); |
3233 | |
3234 | BRDENABLE(portp->brdnr, portp->pagenr); |
3235 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3236 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); |
3237 | portp->hwid = stl_cd1400getreg(portp, GFRCR); |
3238 | BRDDISABLE(portp->brdnr); |
3239 | } |
3240 | |
3241 | /*****************************************************************************/ |
3242 | |
3243 | /* |
3244 | * Wait for the command register to be ready. We will poll this, |
3245 | * since it won't usually take too long to be ready. |
3246 | */ |
3247 | |
3248 | static void stl_cd1400ccrwait(stlport_t *portp) |
3249 | { |
3250 | int i; |
3251 | |
3252 | for (i = 0; (i < CCR_MAXWAIT); i++) { |
3253 | if (stl_cd1400getreg(portp, CCR) == 0) { |
3254 | return; |
3255 | } |
3256 | } |
3257 | |
3258 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", |
3259 | portp->portnr, portp->panelnr, portp->brdnr); |
3260 | } |
3261 | |
3262 | /*****************************************************************************/ |
3263 | |
3264 | /* |
3265 | * Set up the cd1400 registers for a port based on the termios port |
3266 | * settings. |
3267 | */ |
3268 | |
3269 | static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp) |
3270 | { |
3271 | stlbrd_t *brdp; |
3272 | unsigned long flags; |
3273 | unsigned int clkdiv, baudrate; |
3274 | unsigned char cor1, cor2, cor3; |
3275 | unsigned char cor4, cor5, ccr; |
3276 | unsigned char srer, sreron, sreroff; |
3277 | unsigned char mcor1, mcor2, rtpr; |
3278 | unsigned char clk, div; |
3279 | |
3280 | cor1 = 0; |
3281 | cor2 = 0; |
3282 | cor3 = 0; |
3283 | cor4 = 0; |
3284 | cor5 = 0; |
3285 | ccr = 0; |
3286 | rtpr = 0; |
3287 | clk = 0; |
3288 | div = 0; |
3289 | mcor1 = 0; |
3290 | mcor2 = 0; |
3291 | sreron = 0; |
3292 | sreroff = 0; |
3293 | |
3294 | brdp = stl_brds[portp->brdnr]; |
3295 | if (brdp == (stlbrd_t *) NULL) |
3296 | return; |
3297 | |
3298 | /* |
3299 | * Set up the RX char ignore mask with those RX error types we |
3300 | * can ignore. We can get the cd1400 to help us out a little here, |
3301 | * it will ignore parity errors and breaks for us. |
3302 | */ |
3303 | portp->rxignoremsk = 0; |
3304 | if (tiosp->c_iflag & IGNPAR) { |
3305 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); |
3306 | cor1 |= COR1_PARIGNORE; |
3307 | } |
3308 | if (tiosp->c_iflag & IGNBRK) { |
3309 | portp->rxignoremsk |= ST_BREAK; |
3310 | cor4 |= COR4_IGNBRK; |
3311 | } |
3312 | |
3313 | portp->rxmarkmsk = ST_OVERRUN; |
3314 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
3315 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); |
3316 | if (tiosp->c_iflag & BRKINT) |
3317 | portp->rxmarkmsk |= ST_BREAK; |
3318 | |
3319 | /* |
3320 | * Go through the char size, parity and stop bits and set all the |
3321 | * option register appropriately. |
3322 | */ |
3323 | switch (tiosp->c_cflag & CSIZE) { |
3324 | case CS5: |
3325 | cor1 |= COR1_CHL5; |
3326 | break; |
3327 | case CS6: |
3328 | cor1 |= COR1_CHL6; |
3329 | break; |
3330 | case CS7: |
3331 | cor1 |= COR1_CHL7; |
3332 | break; |
3333 | default: |
3334 | cor1 |= COR1_CHL8; |
3335 | break; |
3336 | } |
3337 | |
3338 | if (tiosp->c_cflag & CSTOPB) |
3339 | cor1 |= COR1_STOP2; |
3340 | else |
3341 | cor1 |= COR1_STOP1; |
3342 | |
3343 | if (tiosp->c_cflag & PARENB) { |
3344 | if (tiosp->c_cflag & PARODD) |
3345 | cor1 |= (COR1_PARENB | COR1_PARODD); |
3346 | else |
3347 | cor1 |= (COR1_PARENB | COR1_PAREVEN); |
3348 | } else { |
3349 | cor1 |= COR1_PARNONE; |
3350 | } |
3351 | |
3352 | /* |
3353 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing |
3354 | * space for hardware flow control and the like. This should be set to |
3355 | * VMIN. Also here we will set the RX data timeout to 10ms - this should |
3356 | * really be based on VTIME. |
3357 | */ |
3358 | cor3 |= FIFO_RXTHRESHOLD; |
3359 | rtpr = 2; |
3360 | |
3361 | /* |
3362 | * Calculate the baud rate timers. For now we will just assume that |
3363 | * the input and output baud are the same. Could have used a baud |
3364 | * table here, but this way we can generate virtually any baud rate |
3365 | * we like! |
3366 | */ |
3367 | baudrate = tiosp->c_cflag & CBAUD; |
3368 | if (baudrate & CBAUDEX) { |
3369 | baudrate &= ~CBAUDEX; |
3370 | if ((baudrate < 1) || (baudrate > 4)) |
3371 | tiosp->c_cflag &= ~CBAUDEX; |
3372 | else |
3373 | baudrate += 15; |
3374 | } |
3375 | baudrate = stl_baudrates[baudrate]; |
3376 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
3377 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
3378 | baudrate = 57600; |
3379 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
3380 | baudrate = 115200; |
3381 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
3382 | baudrate = 230400; |
3383 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
3384 | baudrate = 460800; |
3385 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
3386 | baudrate = (portp->baud_base / portp->custom_divisor); |
3387 | } |
3388 | if (baudrate > STL_CD1400MAXBAUD) |
3389 | baudrate = STL_CD1400MAXBAUD; |
3390 | |
3391 | if (baudrate > 0) { |
3392 | for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { |
3393 | clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); |
3394 | if (clkdiv < 0x100) |
3395 | break; |
3396 | } |
3397 | div = (unsigned char) clkdiv; |
3398 | } |
3399 | |
3400 | /* |
3401 | * Check what form of modem signaling is required and set it up. |
3402 | */ |
3403 | if ((tiosp->c_cflag & CLOCAL) == 0) { |
3404 | mcor1 |= MCOR1_DCD; |
3405 | mcor2 |= MCOR2_DCD; |
3406 | sreron |= SRER_MODEM; |
3407 | portp->flags |= ASYNC_CHECK_CD; |
3408 | } else { |
3409 | portp->flags &= ~ASYNC_CHECK_CD; |
3410 | } |
3411 | |
3412 | /* |
3413 | * Setup cd1400 enhanced modes if we can. In particular we want to |
3414 | * handle as much of the flow control as possible automatically. As |
3415 | * well as saving a few CPU cycles it will also greatly improve flow |
3416 | * control reliability. |
3417 | */ |
3418 | if (tiosp->c_iflag & IXON) { |
3419 | cor2 |= COR2_TXIBE; |
3420 | cor3 |= COR3_SCD12; |
3421 | if (tiosp->c_iflag & IXANY) |
3422 | cor2 |= COR2_IXM; |
3423 | } |
3424 | |
3425 | if (tiosp->c_cflag & CRTSCTS) { |
3426 | cor2 |= COR2_CTSAE; |
3427 | mcor1 |= FIFO_RTSTHRESHOLD; |
3428 | } |
3429 | |
3430 | /* |
3431 | * All cd1400 register values calculated so go through and set |
3432 | * them all up. |
3433 | */ |
3434 | |
3435 | #ifdef DEBUG |
3436 | printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
3437 | portp->portnr, portp->panelnr, portp->brdnr); |
3438 | printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", |
3439 | cor1, cor2, cor3, cor4, cor5); |
3440 | printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", |
3441 | mcor1, mcor2, rtpr, sreron, sreroff); |
3442 | printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
3443 | printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
3444 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
3445 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
3446 | #endif |
3447 | |
3448 | save_flags(flags); |
3449 | cli(); |
3450 | BRDENABLE(portp->brdnr, portp->pagenr); |
3451 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); |
3452 | srer = stl_cd1400getreg(portp, SRER); |
3453 | stl_cd1400setreg(portp, SRER, 0); |
3454 | if (stl_cd1400updatereg(portp, COR1, cor1)) |
3455 | ccr = 1; |
3456 | if (stl_cd1400updatereg(portp, COR2, cor2)) |
3457 | ccr = 1; |
3458 | if (stl_cd1400updatereg(portp, COR3, cor3)) |
3459 | ccr = 1; |
3460 | if (ccr) { |
3461 | stl_cd1400ccrwait(portp); |
3462 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); |
3463 | } |
3464 | stl_cd1400setreg(portp, COR4, cor4); |
3465 | stl_cd1400setreg(portp, COR5, cor5); |
3466 | stl_cd1400setreg(portp, MCOR1, mcor1); |
3467 | stl_cd1400setreg(portp, MCOR2, mcor2); |
3468 | if (baudrate > 0) { |
3469 | stl_cd1400setreg(portp, TCOR, clk); |
3470 | stl_cd1400setreg(portp, TBPR, div); |
3471 | stl_cd1400setreg(portp, RCOR, clk); |
3472 | stl_cd1400setreg(portp, RBPR, div); |
3473 | } |
3474 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); |
3475 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); |
3476 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); |
3477 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); |
3478 | stl_cd1400setreg(portp, RTPR, rtpr); |
3479 | mcor1 = stl_cd1400getreg(portp, MSVR1); |
3480 | if (mcor1 & MSVR1_DCD) |
3481 | portp->sigs |= TIOCM_CD; |
3482 | else |
3483 | portp->sigs &= ~TIOCM_CD; |
3484 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); |
3485 | BRDDISABLE(portp->brdnr); |
3486 | restore_flags(flags); |
3487 | } |
3488 | |
3489 | /*****************************************************************************/ |
3490 | |
3491 | /* |
3492 | * Set the state of the DTR and RTS signals. |
3493 | */ |
3494 | |
3495 | static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts) |
3496 | { |
3497 | unsigned char msvr1, msvr2; |
3498 | unsigned long flags; |
3499 | |
3500 | #ifdef DEBUG |
3501 | printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n", |
3502 | (int) portp, dtr, rts); |
3503 | #endif |
3504 | |
3505 | msvr1 = 0; |
3506 | msvr2 = 0; |
3507 | if (dtr > 0) |
3508 | msvr1 = MSVR1_DTR; |
3509 | if (rts > 0) |
3510 | msvr2 = MSVR2_RTS; |
3511 | |
3512 | save_flags(flags); |
3513 | cli(); |
3514 | BRDENABLE(portp->brdnr, portp->pagenr); |
3515 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3516 | if (rts >= 0) |
3517 | stl_cd1400setreg(portp, MSVR2, msvr2); |
3518 | if (dtr >= 0) |
3519 | stl_cd1400setreg(portp, MSVR1, msvr1); |
3520 | BRDDISABLE(portp->brdnr); |
3521 | restore_flags(flags); |
3522 | } |
3523 | |
3524 | /*****************************************************************************/ |
3525 | |
3526 | /* |
3527 | * Return the state of the signals. |
3528 | */ |
3529 | |
3530 | static int stl_cd1400getsignals(stlport_t *portp) |
3531 | { |
3532 | unsigned char msvr1, msvr2; |
3533 | unsigned long flags; |
3534 | int sigs; |
3535 | |
3536 | #ifdef DEBUG |
3537 | printk("stl_cd1400getsignals(portp=%x)\n", (int) portp); |
3538 | #endif |
3539 | |
3540 | save_flags(flags); |
3541 | cli(); |
3542 | BRDENABLE(portp->brdnr, portp->pagenr); |
3543 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3544 | msvr1 = stl_cd1400getreg(portp, MSVR1); |
3545 | msvr2 = stl_cd1400getreg(portp, MSVR2); |
3546 | BRDDISABLE(portp->brdnr); |
3547 | restore_flags(flags); |
3548 | |
3549 | sigs = 0; |
3550 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; |
3551 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; |
3552 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; |
3553 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; |
3554 | #if 0 |
3555 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; |
3556 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; |
3557 | #else |
3558 | sigs |= TIOCM_DSR; |
3559 | #endif |
3560 | return(sigs); |
3561 | } |
3562 | |
3563 | /*****************************************************************************/ |
3564 | |
3565 | /* |
3566 | * Enable/Disable the Transmitter and/or Receiver. |
3567 | */ |
3568 | |
3569 | static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx) |
3570 | { |
3571 | unsigned char ccr; |
3572 | unsigned long flags; |
3573 | |
3574 | #ifdef DEBUG |
3575 | printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n", |
3576 | (int) portp, rx, tx); |
3577 | #endif |
3578 | ccr = 0; |
3579 | |
3580 | if (tx == 0) |
3581 | ccr |= CCR_TXDISABLE; |
3582 | else if (tx > 0) |
3583 | ccr |= CCR_TXENABLE; |
3584 | if (rx == 0) |
3585 | ccr |= CCR_RXDISABLE; |
3586 | else if (rx > 0) |
3587 | ccr |= CCR_RXENABLE; |
3588 | |
3589 | save_flags(flags); |
3590 | cli(); |
3591 | BRDENABLE(portp->brdnr, portp->pagenr); |
3592 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3593 | stl_cd1400ccrwait(portp); |
3594 | stl_cd1400setreg(portp, CCR, ccr); |
3595 | stl_cd1400ccrwait(portp); |
3596 | BRDDISABLE(portp->brdnr); |
3597 | restore_flags(flags); |
3598 | } |
3599 | |
3600 | /*****************************************************************************/ |
3601 | |
3602 | /* |
3603 | * Start/stop the Transmitter and/or Receiver. |
3604 | */ |
3605 | |
3606 | static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx) |
3607 | { |
3608 | unsigned char sreron, sreroff; |
3609 | unsigned long flags; |
3610 | |
3611 | #ifdef DEBUG |
3612 | printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n", |
3613 | (int) portp, rx, tx); |
3614 | #endif |
3615 | |
3616 | sreron = 0; |
3617 | sreroff = 0; |
3618 | if (tx == 0) |
3619 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); |
3620 | else if (tx == 1) |
3621 | sreron |= SRER_TXDATA; |
3622 | else if (tx >= 2) |
3623 | sreron |= SRER_TXEMPTY; |
3624 | if (rx == 0) |
3625 | sreroff |= SRER_RXDATA; |
3626 | else if (rx > 0) |
3627 | sreron |= SRER_RXDATA; |
3628 | |
3629 | save_flags(flags); |
3630 | cli(); |
3631 | BRDENABLE(portp->brdnr, portp->pagenr); |
3632 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3633 | stl_cd1400setreg(portp, SRER, |
3634 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); |
3635 | BRDDISABLE(portp->brdnr); |
3636 | if (tx > 0) |
3637 | set_bit(ASYI_TXBUSY, &portp->istate); |
3638 | restore_flags(flags); |
3639 | } |
3640 | |
3641 | /*****************************************************************************/ |
3642 | |
3643 | /* |
3644 | * Disable all interrupts from this port. |
3645 | */ |
3646 | |
3647 | static void stl_cd1400disableintrs(stlport_t *portp) |
3648 | { |
3649 | unsigned long flags; |
3650 | |
3651 | #ifdef DEBUG |
3652 | printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp); |
3653 | #endif |
3654 | save_flags(flags); |
3655 | cli(); |
3656 | BRDENABLE(portp->brdnr, portp->pagenr); |
3657 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3658 | stl_cd1400setreg(portp, SRER, 0); |
3659 | BRDDISABLE(portp->brdnr); |
3660 | restore_flags(flags); |
3661 | } |
3662 | |
3663 | /*****************************************************************************/ |
3664 | |
3665 | static void stl_cd1400sendbreak(stlport_t *portp, int len) |
3666 | { |
3667 | unsigned long flags; |
3668 | |
3669 | #ifdef DEBUG |
3670 | printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len); |
3671 | #endif |
3672 | |
3673 | save_flags(flags); |
3674 | cli(); |
3675 | BRDENABLE(portp->brdnr, portp->pagenr); |
3676 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3677 | stl_cd1400setreg(portp, SRER, |
3678 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | |
3679 | SRER_TXEMPTY)); |
3680 | BRDDISABLE(portp->brdnr); |
3681 | portp->brklen = len; |
3682 | if (len == 1) |
3683 | portp->stats.txbreaks++; |
3684 | restore_flags(flags); |
3685 | } |
3686 | |
3687 | /*****************************************************************************/ |
3688 | |
3689 | /* |
3690 | * Take flow control actions... |
3691 | */ |
3692 | |
3693 | static void stl_cd1400flowctrl(stlport_t *portp, int state) |
3694 | { |
3695 | struct tty_struct *tty; |
3696 | unsigned long flags; |
3697 | |
3698 | #ifdef DEBUG |
3699 | printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state); |
3700 | #endif |
3701 | |
3702 | if (portp == (stlport_t *) NULL) |
3703 | return; |
3704 | tty = portp->tty; |
3705 | if (tty == (struct tty_struct *) NULL) |
3706 | return; |
3707 | |
3708 | save_flags(flags); |
3709 | cli(); |
3710 | BRDENABLE(portp->brdnr, portp->pagenr); |
3711 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3712 | |
3713 | if (state) { |
3714 | if (tty->termios->c_iflag & IXOFF) { |
3715 | stl_cd1400ccrwait(portp); |
3716 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
3717 | portp->stats.rxxon++; |
3718 | stl_cd1400ccrwait(portp); |
3719 | } |
3720 | /* |
3721 | * Question: should we return RTS to what it was before? It may |
3722 | * have been set by an ioctl... Suppose not, since if you have |
3723 | * hardware flow control set then it is pretty silly to go and |
3724 | * set the RTS line by hand. |
3725 | */ |
3726 | if (tty->termios->c_cflag & CRTSCTS) { |
3727 | stl_cd1400setreg(portp, MCOR1, |
3728 | (stl_cd1400getreg(portp, MCOR1) | |
3729 | FIFO_RTSTHRESHOLD)); |
3730 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); |
3731 | portp->stats.rxrtson++; |
3732 | } |
3733 | } else { |
3734 | if (tty->termios->c_iflag & IXOFF) { |
3735 | stl_cd1400ccrwait(portp); |
3736 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
3737 | portp->stats.rxxoff++; |
3738 | stl_cd1400ccrwait(portp); |
3739 | } |
3740 | if (tty->termios->c_cflag & CRTSCTS) { |
3741 | stl_cd1400setreg(portp, MCOR1, |
3742 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); |
3743 | stl_cd1400setreg(portp, MSVR2, 0); |
3744 | portp->stats.rxrtsoff++; |
3745 | } |
3746 | } |
3747 | |
3748 | BRDDISABLE(portp->brdnr); |
3749 | restore_flags(flags); |
3750 | } |
3751 | |
3752 | /*****************************************************************************/ |
3753 | |
3754 | /* |
3755 | * Send a flow control character... |
3756 | */ |
3757 | |
3758 | static void stl_cd1400sendflow(stlport_t *portp, int state) |
3759 | { |
3760 | struct tty_struct *tty; |
3761 | unsigned long flags; |
3762 | |
3763 | #ifdef DEBUG |
3764 | printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state); |
3765 | #endif |
3766 | |
3767 | if (portp == (stlport_t *) NULL) |
3768 | return; |
3769 | tty = portp->tty; |
3770 | if (tty == (struct tty_struct *) NULL) |
3771 | return; |
3772 | |
3773 | save_flags(flags); |
3774 | cli(); |
3775 | BRDENABLE(portp->brdnr, portp->pagenr); |
3776 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3777 | if (state) { |
3778 | stl_cd1400ccrwait(portp); |
3779 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
3780 | portp->stats.rxxon++; |
3781 | stl_cd1400ccrwait(portp); |
3782 | } else { |
3783 | stl_cd1400ccrwait(portp); |
3784 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
3785 | portp->stats.rxxoff++; |
3786 | stl_cd1400ccrwait(portp); |
3787 | } |
3788 | BRDDISABLE(portp->brdnr); |
3789 | restore_flags(flags); |
3790 | } |
3791 | |
3792 | /*****************************************************************************/ |
3793 | |
3794 | static void stl_cd1400flush(stlport_t *portp) |
3795 | { |
3796 | unsigned long flags; |
3797 | |
3798 | #ifdef DEBUG |
3799 | printk("stl_cd1400flush(portp=%x)\n", (int) portp); |
3800 | #endif |
3801 | |
3802 | if (portp == (stlport_t *) NULL) |
3803 | return; |
3804 | |
3805 | save_flags(flags); |
3806 | cli(); |
3807 | BRDENABLE(portp->brdnr, portp->pagenr); |
3808 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
3809 | stl_cd1400ccrwait(portp); |
3810 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); |
3811 | stl_cd1400ccrwait(portp); |
3812 | portp->tx.tail = portp->tx.head; |
3813 | BRDDISABLE(portp->brdnr); |
3814 | restore_flags(flags); |
3815 | } |
3816 | |
3817 | /*****************************************************************************/ |
3818 | |
3819 | /* |
3820 | * Return the current state of data flow on this port. This is only |
3821 | * really interresting when determining if data has fully completed |
3822 | * transmission or not... This is easy for the cd1400, it accurately |
3823 | * maintains the busy port flag. |
3824 | */ |
3825 | |
3826 | static int stl_cd1400datastate(stlport_t *portp) |
3827 | { |
3828 | #ifdef DEBUG |
3829 | printk("stl_cd1400datastate(portp=%x)\n", (int) portp); |
3830 | #endif |
3831 | |
3832 | if (portp == (stlport_t *) NULL) |
3833 | return(0); |
3834 | |
3835 | return(test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0); |
3836 | } |
3837 | |
3838 | /*****************************************************************************/ |
3839 | |
3840 | /* |
3841 | * Interrupt service routine for cd1400 EasyIO boards. |
3842 | */ |
3843 | |
3844 | static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase) |
3845 | { |
3846 | unsigned char svrtype; |
3847 | |
3848 | #ifdef DEBUG |
3849 | printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n", |
3850 | (int) panelp, iobase); |
3851 | #endif |
3852 | |
3853 | outb(SVRR, iobase); |
3854 | svrtype = inb(iobase + EREG_DATA); |
3855 | if (panelp->nrports > 4) { |
3856 | outb((SVRR + 0x80), iobase); |
3857 | svrtype |= inb(iobase + EREG_DATA); |
3858 | } |
3859 | |
3860 | if (svrtype & SVRR_RX) |
3861 | stl_cd1400rxisr(panelp, iobase); |
3862 | else if (svrtype & SVRR_TX) |
3863 | stl_cd1400txisr(panelp, iobase); |
3864 | else if (svrtype & SVRR_MDM) |
3865 | stl_cd1400mdmisr(panelp, iobase); |
3866 | } |
3867 | |
3868 | /*****************************************************************************/ |
3869 | |
3870 | /* |
3871 | * Interrupt service routine for cd1400 panels. |
3872 | */ |
3873 | |
3874 | static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase) |
3875 | { |
3876 | unsigned char svrtype; |
3877 | |
3878 | #ifdef DEBUG |
3879 | printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp, |
3880 | iobase); |
3881 | #endif |
3882 | |
3883 | outb(SVRR, iobase); |
3884 | svrtype = inb(iobase + EREG_DATA); |
3885 | outb((SVRR + 0x80), iobase); |
3886 | svrtype |= inb(iobase + EREG_DATA); |
3887 | if (svrtype & SVRR_RX) |
3888 | stl_cd1400rxisr(panelp, iobase); |
3889 | else if (svrtype & SVRR_TX) |
3890 | stl_cd1400txisr(panelp, iobase); |
3891 | else if (svrtype & SVRR_MDM) |
3892 | stl_cd1400mdmisr(panelp, iobase); |
3893 | } |
3894 | |
3895 | |
3896 | /*****************************************************************************/ |
3897 | |
3898 | /* |
3899 | * Unfortunately we need to handle breaks in the TX data stream, since |
3900 | * this is the only way to generate them on the cd1400. |
3901 | */ |
3902 | |
3903 | static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr) |
3904 | { |
3905 | if (portp->brklen == 1) { |
3906 | outb((COR2 + portp->uartaddr), ioaddr); |
3907 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), |
3908 | (ioaddr + EREG_DATA)); |
3909 | outb((TDR + portp->uartaddr), ioaddr); |
3910 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
3911 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); |
3912 | outb((SRER + portp->uartaddr), ioaddr); |
3913 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), |
3914 | (ioaddr + EREG_DATA)); |
3915 | return(1); |
3916 | } else if (portp->brklen > 1) { |
3917 | outb((TDR + portp->uartaddr), ioaddr); |
3918 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
3919 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); |
3920 | portp->brklen = -1; |
3921 | return(1); |
3922 | } else { |
3923 | outb((COR2 + portp->uartaddr), ioaddr); |
3924 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), |
3925 | (ioaddr + EREG_DATA)); |
3926 | portp->brklen = 0; |
3927 | } |
3928 | return(0); |
3929 | } |
3930 | |
3931 | /*****************************************************************************/ |
3932 | |
3933 | /* |
3934 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
3935 | * chars is pretty simple, stuff as many as possible from the TX buffer |
3936 | * into the cd1400 FIFO. Must also handle TX breaks here, since they |
3937 | * are embedded as commands in the data stream. Oh no, had to use a goto! |
3938 | * This could be optimized more, will do when I get time... |
3939 | * In practice it is possible that interrupts are enabled but that the |
3940 | * port has been hung up. Need to handle not having any TX buffer here, |
3941 | * this is done by using the side effect that head and tail will also |
3942 | * be NULL if the buffer has been freed. |
3943 | */ |
3944 | |
3945 | static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr) |
3946 | { |
3947 | stlport_t *portp; |
3948 | int len, stlen; |
3949 | char *head, *tail; |
3950 | unsigned char ioack, srer; |
3951 | |
3952 | #ifdef DEBUG |
3953 | printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); |
3954 | #endif |
3955 | |
3956 | ioack = inb(ioaddr + EREG_TXACK); |
3957 | if (((ioack & panelp->ackmask) != 0) || |
3958 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { |
3959 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); |
3960 | return; |
3961 | } |
3962 | portp = panelp->ports[(ioack >> 3)]; |
3963 | |
3964 | /* |
3965 | * Unfortunately we need to handle breaks in the data stream, since |
3966 | * this is the only way to generate them on the cd1400. Do it now if |
3967 | * a break is to be sent. |
3968 | */ |
3969 | if (portp->brklen != 0) |
3970 | if (stl_cd1400breakisr(portp, ioaddr)) |
3971 | goto stl_txalldone; |
3972 | |
3973 | head = portp->tx.head; |
3974 | tail = portp->tx.tail; |
3975 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
3976 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
3977 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
3978 | set_bit(ASYI_TXLOW, &portp->istate); |
3979 | schedule_work(&portp->tqueue); |
3980 | } |
3981 | |
3982 | if (len == 0) { |
3983 | outb((SRER + portp->uartaddr), ioaddr); |
3984 | srer = inb(ioaddr + EREG_DATA); |
3985 | if (srer & SRER_TXDATA) { |
3986 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; |
3987 | } else { |
3988 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); |
3989 | clear_bit(ASYI_TXBUSY, &portp->istate); |
3990 | } |
3991 | outb(srer, (ioaddr + EREG_DATA)); |
3992 | } else { |
3993 | len = MIN(len, CD1400_TXFIFOSIZE); |
3994 | portp->stats.txtotal += len; |
3995 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
3996 | outb((TDR + portp->uartaddr), ioaddr); |
3997 | outsb((ioaddr + EREG_DATA), tail, stlen); |
3998 | len -= stlen; |
3999 | tail += stlen; |
4000 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
4001 | tail = portp->tx.buf; |
4002 | if (len > 0) { |
4003 | outsb((ioaddr + EREG_DATA), tail, len); |
4004 | tail += len; |
4005 | } |
4006 | portp->tx.tail = tail; |
4007 | } |
4008 | |
4009 | stl_txalldone: |
4010 | outb((EOSRR + portp->uartaddr), ioaddr); |
4011 | outb(0, (ioaddr + EREG_DATA)); |
4012 | } |
4013 | |
4014 | /*****************************************************************************/ |
4015 | |
4016 | /* |
4017 | * Receive character interrupt handler. Determine if we have good chars |
4018 | * or bad chars and then process appropriately. Good chars are easy |
4019 | * just shove the lot into the RX buffer and set all status byte to 0. |
4020 | * If a bad RX char then process as required. This routine needs to be |
4021 | * fast! In practice it is possible that we get an interrupt on a port |
4022 | * that is closed. This can happen on hangups - since they completely |
4023 | * shutdown a port not in user context. Need to handle this case. |
4024 | */ |
4025 | |
4026 | static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr) |
4027 | { |
4028 | stlport_t *portp; |
4029 | struct tty_struct *tty; |
4030 | unsigned int ioack, len, buflen; |
4031 | unsigned char status; |
4032 | char ch; |
4033 | |
4034 | #ifdef DEBUG |
4035 | printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); |
4036 | #endif |
4037 | |
4038 | ioack = inb(ioaddr + EREG_RXACK); |
4039 | if ((ioack & panelp->ackmask) != 0) { |
4040 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
4041 | return; |
4042 | } |
4043 | portp = panelp->ports[(ioack >> 3)]; |
4044 | tty = portp->tty; |
4045 | |
4046 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { |
4047 | outb((RDCR + portp->uartaddr), ioaddr); |
4048 | len = inb(ioaddr + EREG_DATA); |
4049 | if ((tty == (struct tty_struct *) NULL) || |
4050 | (tty->flip.char_buf_ptr == (char *) NULL) || |
4051 | ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) { |
4052 | len = MIN(len, sizeof(stl_unwanted)); |
4053 | outb((RDSR + portp->uartaddr), ioaddr); |
4054 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); |
4055 | portp->stats.rxlost += len; |
4056 | portp->stats.rxtotal += len; |
4057 | } else { |
4058 | len = MIN(len, buflen); |
4059 | if (len > 0) { |
4060 | outb((RDSR + portp->uartaddr), ioaddr); |
4061 | insb((ioaddr + EREG_DATA), tty->flip.char_buf_ptr, len); |
4062 | memset(tty->flip.flag_buf_ptr, 0, len); |
4063 | tty->flip.flag_buf_ptr += len; |
4064 | tty->flip.char_buf_ptr += len; |
4065 | tty->flip.count += len; |
4066 | tty_schedule_flip(tty); |
4067 | portp->stats.rxtotal += len; |
4068 | } |
4069 | } |
4070 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { |
4071 | outb((RDSR + portp->uartaddr), ioaddr); |
4072 | status = inb(ioaddr + EREG_DATA); |
4073 | ch = inb(ioaddr + EREG_DATA); |
4074 | if (status & ST_PARITY) |
4075 | portp->stats.rxparity++; |
4076 | if (status & ST_FRAMING) |
4077 | portp->stats.rxframing++; |
4078 | if (status & ST_OVERRUN) |
4079 | portp->stats.rxoverrun++; |
4080 | if (status & ST_BREAK) |
4081 | portp->stats.rxbreaks++; |
4082 | if (status & ST_SCHARMASK) { |
4083 | if ((status & ST_SCHARMASK) == ST_SCHAR1) |
4084 | portp->stats.txxon++; |
4085 | if ((status & ST_SCHARMASK) == ST_SCHAR2) |
4086 | portp->stats.txxoff++; |
4087 | goto stl_rxalldone; |
4088 | } |
4089 | if ((tty != (struct tty_struct *) NULL) && |
4090 | ((portp->rxignoremsk & status) == 0)) { |
4091 | if (portp->rxmarkmsk & status) { |
4092 | if (status & ST_BREAK) { |
4093 | status = TTY_BREAK; |
4094 | if (portp->flags & ASYNC_SAK) { |
4095 | do_SAK(tty); |
4096 | BRDENABLE(portp->brdnr, portp->pagenr); |
4097 | } |
4098 | } else if (status & ST_PARITY) { |
4099 | status = TTY_PARITY; |
4100 | } else if (status & ST_FRAMING) { |
4101 | status = TTY_FRAME; |
4102 | } else if(status & ST_OVERRUN) { |
4103 | status = TTY_OVERRUN; |
4104 | } else { |
4105 | status = 0; |
4106 | } |
4107 | } else { |
4108 | status = 0; |
4109 | } |
4110 | if (tty->flip.char_buf_ptr != (char *) NULL) { |
4111 | if (tty->flip.count < TTY_FLIPBUF_SIZE) { |
4112 | *tty->flip.flag_buf_ptr++ = status; |
4113 | *tty->flip.char_buf_ptr++ = ch; |
4114 | tty->flip.count++; |
4115 | } |
4116 | tty_schedule_flip(tty); |
4117 | } |
4118 | } |
4119 | } else { |
4120 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
4121 | return; |
4122 | } |
4123 | |
4124 | stl_rxalldone: |
4125 | outb((EOSRR + portp->uartaddr), ioaddr); |
4126 | outb(0, (ioaddr + EREG_DATA)); |
4127 | } |
4128 | |
4129 | /*****************************************************************************/ |
4130 | |
4131 | /* |
4132 | * Modem interrupt handler. The is called when the modem signal line |
4133 | * (DCD) has changed state. Leave most of the work to the off-level |
4134 | * processing routine. |
4135 | */ |
4136 | |
4137 | static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr) |
4138 | { |
4139 | stlport_t *portp; |
4140 | unsigned int ioack; |
4141 | unsigned char misr; |
4142 | |
4143 | #ifdef DEBUG |
4144 | printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp); |
4145 | #endif |
4146 | |
4147 | ioack = inb(ioaddr + EREG_MDACK); |
4148 | if (((ioack & panelp->ackmask) != 0) || |
4149 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { |
4150 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); |
4151 | return; |
4152 | } |
4153 | portp = panelp->ports[(ioack >> 3)]; |
4154 | |
4155 | outb((MISR + portp->uartaddr), ioaddr); |
4156 | misr = inb(ioaddr + EREG_DATA); |
4157 | if (misr & MISR_DCD) { |
4158 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
4159 | schedule_work(&portp->tqueue); |
4160 | portp->stats.modem++; |
4161 | } |
4162 | |
4163 | outb((EOSRR + portp->uartaddr), ioaddr); |
4164 | outb(0, (ioaddr + EREG_DATA)); |
4165 | } |
4166 | |
4167 | /*****************************************************************************/ |
4168 | /* SC26198 HARDWARE FUNCTIONS */ |
4169 | /*****************************************************************************/ |
4170 | |
4171 | /* |
4172 | * These functions get/set/update the registers of the sc26198 UARTs. |
4173 | * Access to the sc26198 registers is via an address/data io port pair. |
4174 | * (Maybe should make this inline...) |
4175 | */ |
4176 | |
4177 | static int stl_sc26198getreg(stlport_t *portp, int regnr) |
4178 | { |
4179 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
4180 | return(inb(portp->ioaddr + XP_DATA)); |
4181 | } |
4182 | |
4183 | static void stl_sc26198setreg(stlport_t *portp, int regnr, int value) |
4184 | { |
4185 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
4186 | outb(value, (portp->ioaddr + XP_DATA)); |
4187 | } |
4188 | |
4189 | static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value) |
4190 | { |
4191 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
4192 | if (inb(portp->ioaddr + XP_DATA) != value) { |
4193 | outb(value, (portp->ioaddr + XP_DATA)); |
4194 | return(1); |
4195 | } |
4196 | return(0); |
4197 | } |
4198 | |
4199 | /*****************************************************************************/ |
4200 | |
4201 | /* |
4202 | * Functions to get and set the sc26198 global registers. |
4203 | */ |
4204 | |
4205 | static int stl_sc26198getglobreg(stlport_t *portp, int regnr) |
4206 | { |
4207 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
4208 | return(inb(portp->ioaddr + XP_DATA)); |
4209 | } |
4210 | |
4211 | #if 0 |
4212 | static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value) |
4213 | { |
4214 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
4215 | outb(value, (portp->ioaddr + XP_DATA)); |
4216 | } |
4217 | #endif |
4218 | |
4219 | /*****************************************************************************/ |
4220 | |
4221 | /* |
4222 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
4223 | * these ports are on - since the port io registers are almost |
4224 | * identical when dealing with ports. |
4225 | */ |
4226 | |
4227 | static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp) |
4228 | { |
4229 | int chipmask, i; |
4230 | int nrchips, ioaddr; |
4231 | |
4232 | #ifdef DEBUG |
4233 | printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n", |
4234 | (int) brdp, (int) panelp); |
4235 | #endif |
4236 | |
4237 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
4238 | |
4239 | /* |
4240 | * Check that each chip is present and started up OK. |
4241 | */ |
4242 | chipmask = 0; |
4243 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; |
4244 | if (brdp->brdtype == BRD_ECHPCI) |
4245 | outb(panelp->pagenr, brdp->ioctrl); |
4246 | |
4247 | for (i = 0; (i < nrchips); i++) { |
4248 | ioaddr = panelp->iobase + (i * 4); |
4249 | outb(SCCR, (ioaddr + XP_ADDR)); |
4250 | outb(CR_RESETALL, (ioaddr + XP_DATA)); |
4251 | outb(TSTR, (ioaddr + XP_ADDR)); |
4252 | if (inb(ioaddr + XP_DATA) != 0) { |
4253 | printk("STALLION: sc26198 not responding, " |
4254 | "brd=%d panel=%d chip=%d\n", |
4255 | panelp->brdnr, panelp->panelnr, i); |
4256 | continue; |
4257 | } |
4258 | chipmask |= (0x1 << i); |
4259 | outb(GCCR, (ioaddr + XP_ADDR)); |
4260 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); |
4261 | outb(WDTRCR, (ioaddr + XP_ADDR)); |
4262 | outb(0xff, (ioaddr + XP_DATA)); |
4263 | } |
4264 | |
4265 | BRDDISABLE(panelp->brdnr); |
4266 | return(chipmask); |
4267 | } |
4268 | |
4269 | /*****************************************************************************/ |
4270 | |
4271 | /* |
4272 | * Initialize hardware specific port registers. |
4273 | */ |
4274 | |
4275 | static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) |
4276 | { |
4277 | #ifdef DEBUG |
4278 | printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n", |
4279 | (int) brdp, (int) panelp, (int) portp); |
4280 | #endif |
4281 | |
4282 | if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || |
4283 | (portp == (stlport_t *) NULL)) |
4284 | return; |
4285 | |
4286 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); |
4287 | portp->uartaddr = (portp->portnr & 0x07) << 4; |
4288 | portp->pagenr = panelp->pagenr; |
4289 | portp->hwid = 0x1; |
4290 | |
4291 | BRDENABLE(portp->brdnr, portp->pagenr); |
4292 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); |
4293 | BRDDISABLE(portp->brdnr); |
4294 | } |
4295 | |
4296 | /*****************************************************************************/ |
4297 | |
4298 | /* |
4299 | * Set up the sc26198 registers for a port based on the termios port |
4300 | * settings. |
4301 | */ |
4302 | |
4303 | static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp) |
4304 | { |
4305 | stlbrd_t *brdp; |
4306 | unsigned long flags; |
4307 | unsigned int baudrate; |
4308 | unsigned char mr0, mr1, mr2, clk; |
4309 | unsigned char imron, imroff, iopr, ipr; |
4310 | |
4311 | mr0 = 0; |
4312 | mr1 = 0; |
4313 | mr2 = 0; |
4314 | clk = 0; |
4315 | iopr = 0; |
4316 | imron = 0; |
4317 | imroff = 0; |
4318 | |
4319 | brdp = stl_brds[portp->brdnr]; |
4320 | if (brdp == (stlbrd_t *) NULL) |
4321 | return; |
4322 | |
4323 | /* |
4324 | * Set up the RX char ignore mask with those RX error types we |
4325 | * can ignore. |
4326 | */ |
4327 | portp->rxignoremsk = 0; |
4328 | if (tiosp->c_iflag & IGNPAR) |
4329 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | |
4330 | SR_RXOVERRUN); |
4331 | if (tiosp->c_iflag & IGNBRK) |
4332 | portp->rxignoremsk |= SR_RXBREAK; |
4333 | |
4334 | portp->rxmarkmsk = SR_RXOVERRUN; |
4335 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
4336 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); |
4337 | if (tiosp->c_iflag & BRKINT) |
4338 | portp->rxmarkmsk |= SR_RXBREAK; |
4339 | |
4340 | /* |
4341 | * Go through the char size, parity and stop bits and set all the |
4342 | * option register appropriately. |
4343 | */ |
4344 | switch (tiosp->c_cflag & CSIZE) { |
4345 | case CS5: |
4346 | mr1 |= MR1_CS5; |
4347 | break; |
4348 | case CS6: |
4349 | mr1 |= MR1_CS6; |
4350 | break; |
4351 | case CS7: |
4352 | mr1 |= MR1_CS7; |
4353 | break; |
4354 | default: |
4355 | mr1 |= MR1_CS8; |
4356 | break; |
4357 | } |
4358 | |
4359 | if (tiosp->c_cflag & CSTOPB) |
4360 | mr2 |= MR2_STOP2; |
4361 | else |
4362 | mr2 |= MR2_STOP1; |
4363 | |
4364 | if (tiosp->c_cflag & PARENB) { |
4365 | if (tiosp->c_cflag & PARODD) |
4366 | mr1 |= (MR1_PARENB | MR1_PARODD); |
4367 | else |
4368 | mr1 |= (MR1_PARENB | MR1_PAREVEN); |
4369 | } else { |
4370 | mr1 |= MR1_PARNONE; |
4371 | } |
4372 | |
4373 | mr1 |= MR1_ERRBLOCK; |
4374 | |
4375 | /* |
4376 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing |
4377 | * space for hardware flow control and the like. This should be set to |
4378 | * VMIN. |
4379 | */ |
4380 | mr2 |= MR2_RXFIFOHALF; |
4381 | |
4382 | /* |
4383 | * Calculate the baud rate timers. For now we will just assume that |
4384 | * the input and output baud are the same. The sc26198 has a fixed |
4385 | * baud rate table, so only discrete baud rates possible. |
4386 | */ |
4387 | baudrate = tiosp->c_cflag & CBAUD; |
4388 | if (baudrate & CBAUDEX) { |
4389 | baudrate &= ~CBAUDEX; |
4390 | if ((baudrate < 1) || (baudrate > 4)) |
4391 | tiosp->c_cflag &= ~CBAUDEX; |
4392 | else |
4393 | baudrate += 15; |
4394 | } |
4395 | baudrate = stl_baudrates[baudrate]; |
4396 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
4397 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
4398 | baudrate = 57600; |
4399 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
4400 | baudrate = 115200; |
4401 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
4402 | baudrate = 230400; |
4403 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
4404 | baudrate = 460800; |
4405 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
4406 | baudrate = (portp->baud_base / portp->custom_divisor); |
4407 | } |
4408 | if (baudrate > STL_SC26198MAXBAUD) |
4409 | baudrate = STL_SC26198MAXBAUD; |
4410 | |
4411 | if (baudrate > 0) { |
4412 | for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { |
4413 | if (baudrate <= sc26198_baudtable[clk]) |
4414 | break; |
4415 | } |
4416 | } |
4417 | |
4418 | /* |
4419 | * Check what form of modem signaling is required and set it up. |
4420 | */ |
4421 | if (tiosp->c_cflag & CLOCAL) { |
4422 | portp->flags &= ~ASYNC_CHECK_CD; |
4423 | } else { |
4424 | iopr |= IOPR_DCDCOS; |
4425 | imron |= IR_IOPORT; |
4426 | portp->flags |= ASYNC_CHECK_CD; |
4427 | } |
4428 | |
4429 | /* |
4430 | * Setup sc26198 enhanced modes if we can. In particular we want to |
4431 | * handle as much of the flow control as possible automatically. As |
4432 | * well as saving a few CPU cycles it will also greatly improve flow |
4433 | * control reliability. |
4434 | */ |
4435 | if (tiosp->c_iflag & IXON) { |
4436 | mr0 |= MR0_SWFTX | MR0_SWFT; |
4437 | imron |= IR_XONXOFF; |
4438 | } else { |
4439 | imroff |= IR_XONXOFF; |
4440 | } |
4441 | if (tiosp->c_iflag & IXOFF) |
4442 | mr0 |= MR0_SWFRX; |
4443 | |
4444 | if (tiosp->c_cflag & CRTSCTS) { |
4445 | mr2 |= MR2_AUTOCTS; |
4446 | mr1 |= MR1_AUTORTS; |
4447 | } |
4448 | |
4449 | /* |
4450 | * All sc26198 register values calculated so go through and set |
4451 | * them all up. |
4452 | */ |
4453 | |
4454 | #ifdef DEBUG |
4455 | printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
4456 | portp->portnr, portp->panelnr, portp->brdnr); |
4457 | printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
4458 | printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); |
4459 | printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
4460 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
4461 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
4462 | #endif |
4463 | |
4464 | save_flags(flags); |
4465 | cli(); |
4466 | BRDENABLE(portp->brdnr, portp->pagenr); |
4467 | stl_sc26198setreg(portp, IMR, 0); |
4468 | stl_sc26198updatereg(portp, MR0, mr0); |
4469 | stl_sc26198updatereg(portp, MR1, mr1); |
4470 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); |
4471 | stl_sc26198updatereg(portp, MR2, mr2); |
4472 | stl_sc26198updatereg(portp, IOPIOR, |
4473 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); |
4474 | |
4475 | if (baudrate > 0) { |
4476 | stl_sc26198setreg(portp, TXCSR, clk); |
4477 | stl_sc26198setreg(portp, RXCSR, clk); |
4478 | } |
4479 | |
4480 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); |
4481 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); |
4482 | |
4483 | ipr = stl_sc26198getreg(portp, IPR); |
4484 | if (ipr & IPR_DCD) |
4485 | portp->sigs &= ~TIOCM_CD; |
4486 | else |
4487 | portp->sigs |= TIOCM_CD; |
4488 | |
4489 | portp->imr = (portp->imr & ~imroff) | imron; |
4490 | stl_sc26198setreg(portp, IMR, portp->imr); |
4491 | BRDDISABLE(portp->brdnr); |
4492 | restore_flags(flags); |
4493 | } |
4494 | |
4495 | /*****************************************************************************/ |
4496 | |
4497 | /* |
4498 | * Set the state of the DTR and RTS signals. |
4499 | */ |
4500 | |
4501 | static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts) |
4502 | { |
4503 | unsigned char iopioron, iopioroff; |
4504 | unsigned long flags; |
4505 | |
4506 | #ifdef DEBUG |
4507 | printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n", |
4508 | (int) portp, dtr, rts); |
4509 | #endif |
4510 | |
4511 | iopioron = 0; |
4512 | iopioroff = 0; |
4513 | if (dtr == 0) |
4514 | iopioroff |= IPR_DTR; |
4515 | else if (dtr > 0) |
4516 | iopioron |= IPR_DTR; |
4517 | if (rts == 0) |
4518 | iopioroff |= IPR_RTS; |
4519 | else if (rts > 0) |
4520 | iopioron |= IPR_RTS; |
4521 | |
4522 | save_flags(flags); |
4523 | cli(); |
4524 | BRDENABLE(portp->brdnr, portp->pagenr); |
4525 | stl_sc26198setreg(portp, IOPIOR, |
4526 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); |
4527 | BRDDISABLE(portp->brdnr); |
4528 | restore_flags(flags); |
4529 | } |
4530 | |
4531 | /*****************************************************************************/ |
4532 | |
4533 | /* |
4534 | * Return the state of the signals. |
4535 | */ |
4536 | |
4537 | static int stl_sc26198getsignals(stlport_t *portp) |
4538 | { |
4539 | unsigned char ipr; |
4540 | unsigned long flags; |
4541 | int sigs; |
4542 | |
4543 | #ifdef DEBUG |
4544 | printk("stl_sc26198getsignals(portp=%x)\n", (int) portp); |
4545 | #endif |
4546 | |
4547 | save_flags(flags); |
4548 | cli(); |
4549 | BRDENABLE(portp->brdnr, portp->pagenr); |
4550 | ipr = stl_sc26198getreg(portp, IPR); |
4551 | BRDDISABLE(portp->brdnr); |
4552 | restore_flags(flags); |
4553 | |
4554 | sigs = 0; |
4555 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; |
4556 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; |
4557 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; |
4558 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; |
4559 | sigs |= TIOCM_DSR; |
4560 | return(sigs); |
4561 | } |
4562 | |
4563 | /*****************************************************************************/ |
4564 | |
4565 | /* |
4566 | * Enable/Disable the Transmitter and/or Receiver. |
4567 | */ |
4568 | |
4569 | static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx) |
4570 | { |
4571 | unsigned char ccr; |
4572 | unsigned long flags; |
4573 | |
4574 | #ifdef DEBUG |
4575 | printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n", |
4576 | (int) portp, rx, tx); |
4577 | #endif |
4578 | |
4579 | ccr = portp->crenable; |
4580 | if (tx == 0) |
4581 | ccr &= ~CR_TXENABLE; |
4582 | else if (tx > 0) |
4583 | ccr |= CR_TXENABLE; |
4584 | if (rx == 0) |
4585 | ccr &= ~CR_RXENABLE; |
4586 | else if (rx > 0) |
4587 | ccr |= CR_RXENABLE; |
4588 | |
4589 | save_flags(flags); |
4590 | cli(); |
4591 | BRDENABLE(portp->brdnr, portp->pagenr); |
4592 | stl_sc26198setreg(portp, SCCR, ccr); |
4593 | BRDDISABLE(portp->brdnr); |
4594 | portp->crenable = ccr; |
4595 | restore_flags(flags); |
4596 | } |
4597 | |
4598 | /*****************************************************************************/ |
4599 | |
4600 | /* |
4601 | * Start/stop the Transmitter and/or Receiver. |
4602 | */ |
4603 | |
4604 | static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx) |
4605 | { |
4606 | unsigned char imr; |
4607 | unsigned long flags; |
4608 | |
4609 | #ifdef DEBUG |
4610 | printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n", |
4611 | (int) portp, rx, tx); |
4612 | #endif |
4613 | |
4614 | imr = portp->imr; |
4615 | if (tx == 0) |
4616 | imr &= ~IR_TXRDY; |
4617 | else if (tx == 1) |
4618 | imr |= IR_TXRDY; |
4619 | if (rx == 0) |
4620 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); |
4621 | else if (rx > 0) |
4622 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; |
4623 | |
4624 | save_flags(flags); |
4625 | cli(); |
4626 | BRDENABLE(portp->brdnr, portp->pagenr); |
4627 | stl_sc26198setreg(portp, IMR, imr); |
4628 | BRDDISABLE(portp->brdnr); |
4629 | portp->imr = imr; |
4630 | if (tx > 0) |
4631 | set_bit(ASYI_TXBUSY, &portp->istate); |
4632 | restore_flags(flags); |
4633 | } |
4634 | |
4635 | /*****************************************************************************/ |
4636 | |
4637 | /* |
4638 | * Disable all interrupts from this port. |
4639 | */ |
4640 | |
4641 | static void stl_sc26198disableintrs(stlport_t *portp) |
4642 | { |
4643 | unsigned long flags; |
4644 | |
4645 | #ifdef DEBUG |
4646 | printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp); |
4647 | #endif |
4648 | |
4649 | save_flags(flags); |
4650 | cli(); |
4651 | BRDENABLE(portp->brdnr, portp->pagenr); |
4652 | portp->imr = 0; |
4653 | stl_sc26198setreg(portp, IMR, 0); |
4654 | BRDDISABLE(portp->brdnr); |
4655 | restore_flags(flags); |
4656 | } |
4657 | |
4658 | /*****************************************************************************/ |
4659 | |
4660 | static void stl_sc26198sendbreak(stlport_t *portp, int len) |
4661 | { |
4662 | unsigned long flags; |
4663 | |
4664 | #ifdef DEBUG |
4665 | printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len); |
4666 | #endif |
4667 | |
4668 | save_flags(flags); |
4669 | cli(); |
4670 | BRDENABLE(portp->brdnr, portp->pagenr); |
4671 | if (len == 1) { |
4672 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); |
4673 | portp->stats.txbreaks++; |
4674 | } else { |
4675 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); |
4676 | } |
4677 | BRDDISABLE(portp->brdnr); |
4678 | restore_flags(flags); |
4679 | } |
4680 | |
4681 | /*****************************************************************************/ |
4682 | |
4683 | /* |
4684 | * Take flow control actions... |
4685 | */ |
4686 | |
4687 | static void stl_sc26198flowctrl(stlport_t *portp, int state) |
4688 | { |
4689 | struct tty_struct *tty; |
4690 | unsigned long flags; |
4691 | unsigned char mr0; |
4692 | |
4693 | #ifdef DEBUG |
4694 | printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state); |
4695 | #endif |
4696 | |
4697 | if (portp == (stlport_t *) NULL) |
4698 | return; |
4699 | tty = portp->tty; |
4700 | if (tty == (struct tty_struct *) NULL) |
4701 | return; |
4702 | |
4703 | save_flags(flags); |
4704 | cli(); |
4705 | BRDENABLE(portp->brdnr, portp->pagenr); |
4706 | |
4707 | if (state) { |
4708 | if (tty->termios->c_iflag & IXOFF) { |
4709 | mr0 = stl_sc26198getreg(portp, MR0); |
4710 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
4711 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
4712 | mr0 |= MR0_SWFRX; |
4713 | portp->stats.rxxon++; |
4714 | stl_sc26198wait(portp); |
4715 | stl_sc26198setreg(portp, MR0, mr0); |
4716 | } |
4717 | /* |
4718 | * Question: should we return RTS to what it was before? It may |
4719 | * have been set by an ioctl... Suppose not, since if you have |
4720 | * hardware flow control set then it is pretty silly to go and |
4721 | * set the RTS line by hand. |
4722 | */ |
4723 | if (tty->termios->c_cflag & CRTSCTS) { |
4724 | stl_sc26198setreg(portp, MR1, |
4725 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); |
4726 | stl_sc26198setreg(portp, IOPIOR, |
4727 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); |
4728 | portp->stats.rxrtson++; |
4729 | } |
4730 | } else { |
4731 | if (tty->termios->c_iflag & IXOFF) { |
4732 | mr0 = stl_sc26198getreg(portp, MR0); |
4733 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
4734 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
4735 | mr0 &= ~MR0_SWFRX; |
4736 | portp->stats.rxxoff++; |
4737 | stl_sc26198wait(portp); |
4738 | stl_sc26198setreg(portp, MR0, mr0); |
4739 | } |
4740 | if (tty->termios->c_cflag & CRTSCTS) { |
4741 | stl_sc26198setreg(portp, MR1, |
4742 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); |
4743 | stl_sc26198setreg(portp, IOPIOR, |
4744 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); |
4745 | portp->stats.rxrtsoff++; |
4746 | } |
4747 | } |
4748 | |
4749 | BRDDISABLE(portp->brdnr); |
4750 | restore_flags(flags); |
4751 | } |
4752 | |
4753 | /*****************************************************************************/ |
4754 | |
4755 | /* |
4756 | * Send a flow control character. |
4757 | */ |
4758 | |
4759 | static void stl_sc26198sendflow(stlport_t *portp, int state) |
4760 | { |
4761 | struct tty_struct *tty; |
4762 | unsigned long flags; |
4763 | unsigned char mr0; |
4764 | |
4765 | #ifdef DEBUG |
4766 | printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state); |
4767 | #endif |
4768 | |
4769 | if (portp == (stlport_t *) NULL) |
4770 | return; |
4771 | tty = portp->tty; |
4772 | if (tty == (struct tty_struct *) NULL) |
4773 | return; |
4774 | |
4775 | save_flags(flags); |
4776 | cli(); |
4777 | BRDENABLE(portp->brdnr, portp->pagenr); |
4778 | if (state) { |
4779 | mr0 = stl_sc26198getreg(portp, MR0); |
4780 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
4781 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
4782 | mr0 |= MR0_SWFRX; |
4783 | portp->stats.rxxon++; |
4784 | stl_sc26198wait(portp); |
4785 | stl_sc26198setreg(portp, MR0, mr0); |
4786 | } else { |
4787 | mr0 = stl_sc26198getreg(portp, MR0); |
4788 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
4789 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
4790 | mr0 &= ~MR0_SWFRX; |
4791 | portp->stats.rxxoff++; |
4792 | stl_sc26198wait(portp); |
4793 | stl_sc26198setreg(portp, MR0, mr0); |
4794 | } |
4795 | BRDDISABLE(portp->brdnr); |
4796 | restore_flags(flags); |
4797 | } |
4798 | |
4799 | /*****************************************************************************/ |
4800 | |
4801 | static void stl_sc26198flush(stlport_t *portp) |
4802 | { |
4803 | unsigned long flags; |
4804 | |
4805 | #ifdef DEBUG |
4806 | printk("stl_sc26198flush(portp=%x)\n", (int) portp); |
4807 | #endif |
4808 | |
4809 | if (portp == (stlport_t *) NULL) |
4810 | return; |
4811 | |
4812 | save_flags(flags); |
4813 | cli(); |
4814 | BRDENABLE(portp->brdnr, portp->pagenr); |
4815 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); |
4816 | stl_sc26198setreg(portp, SCCR, portp->crenable); |
4817 | BRDDISABLE(portp->brdnr); |
4818 | portp->tx.tail = portp->tx.head; |
4819 | restore_flags(flags); |
4820 | } |
4821 | |
4822 | /*****************************************************************************/ |
4823 | |
4824 | /* |
4825 | * Return the current state of data flow on this port. This is only |
4826 | * really interresting when determining if data has fully completed |
4827 | * transmission or not... The sc26198 interrupt scheme cannot |
4828 | * determine when all data has actually drained, so we need to |
4829 | * check the port statusy register to be sure. |
4830 | */ |
4831 | |
4832 | static int stl_sc26198datastate(stlport_t *portp) |
4833 | { |
4834 | unsigned long flags; |
4835 | unsigned char sr; |
4836 | |
4837 | #ifdef DEBUG |
4838 | printk("stl_sc26198datastate(portp=%x)\n", (int) portp); |
4839 | #endif |
4840 | |
4841 | if (portp == (stlport_t *) NULL) |
4842 | return(0); |
4843 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
4844 | return(1); |
4845 | |
4846 | save_flags(flags); |
4847 | cli(); |
4848 | BRDENABLE(portp->brdnr, portp->pagenr); |
4849 | sr = stl_sc26198getreg(portp, SR); |
4850 | BRDDISABLE(portp->brdnr); |
4851 | restore_flags(flags); |
4852 | |
4853 | return((sr & SR_TXEMPTY) ? 0 : 1); |
4854 | } |
4855 | |
4856 | /*****************************************************************************/ |
4857 | |
4858 | /* |
4859 | * Delay for a small amount of time, to give the sc26198 a chance |
4860 | * to process a command... |
4861 | */ |
4862 | |
4863 | static void stl_sc26198wait(stlport_t *portp) |
4864 | { |
4865 | int i; |
4866 | |
4867 | #ifdef DEBUG |
4868 | printk("stl_sc26198wait(portp=%x)\n", (int) portp); |
4869 | #endif |
4870 | |
4871 | if (portp == (stlport_t *) NULL) |
4872 | return; |
4873 | |
4874 | for (i = 0; (i < 20); i++) |
4875 | stl_sc26198getglobreg(portp, TSTR); |
4876 | } |
4877 | |
4878 | /*****************************************************************************/ |
4879 | |
4880 | /* |
4881 | * If we are TX flow controlled and in IXANY mode then we may |
4882 | * need to unflow control here. We gotta do this because of the |
4883 | * automatic flow control modes of the sc26198. |
4884 | */ |
4885 | |
4886 | static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty) |
4887 | { |
4888 | unsigned char mr0; |
4889 | |
4890 | mr0 = stl_sc26198getreg(portp, MR0); |
4891 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
4892 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); |
4893 | stl_sc26198wait(portp); |
4894 | stl_sc26198setreg(portp, MR0, mr0); |
4895 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
4896 | } |
4897 | |
4898 | /*****************************************************************************/ |
4899 | |
4900 | /* |
4901 | * Interrupt service routine for sc26198 panels. |
4902 | */ |
4903 | |
4904 | static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase) |
4905 | { |
4906 | stlport_t *portp; |
4907 | unsigned int iack; |
4908 | |
4909 | /* |
4910 | * Work around bug in sc26198 chip... Cannot have A6 address |
4911 | * line of UART high, else iack will be returned as 0. |
4912 | */ |
4913 | outb(0, (iobase + 1)); |
4914 | |
4915 | iack = inb(iobase + XP_IACK); |
4916 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; |
4917 | |
4918 | if (iack & IVR_RXDATA) |
4919 | stl_sc26198rxisr(portp, iack); |
4920 | else if (iack & IVR_TXDATA) |
4921 | stl_sc26198txisr(portp); |
4922 | else |
4923 | stl_sc26198otherisr(portp, iack); |
4924 | } |
4925 | |
4926 | /*****************************************************************************/ |
4927 | |
4928 | /* |
4929 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
4930 | * chars is pretty simple, stuff as many as possible from the TX buffer |
4931 | * into the sc26198 FIFO. |
4932 | * In practice it is possible that interrupts are enabled but that the |
4933 | * port has been hung up. Need to handle not having any TX buffer here, |
4934 | * this is done by using the side effect that head and tail will also |
4935 | * be NULL if the buffer has been freed. |
4936 | */ |
4937 | |
4938 | static void stl_sc26198txisr(stlport_t *portp) |
4939 | { |
4940 | unsigned int ioaddr; |
4941 | unsigned char mr0; |
4942 | int len, stlen; |
4943 | char *head, *tail; |
4944 | |
4945 | #ifdef DEBUG |
4946 | printk("stl_sc26198txisr(portp=%x)\n", (int) portp); |
4947 | #endif |
4948 | |
4949 | ioaddr = portp->ioaddr; |
4950 | head = portp->tx.head; |
4951 | tail = portp->tx.tail; |
4952 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
4953 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
4954 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
4955 | set_bit(ASYI_TXLOW, &portp->istate); |
4956 | schedule_work(&portp->tqueue); |
4957 | } |
4958 | |
4959 | if (len == 0) { |
4960 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); |
4961 | mr0 = inb(ioaddr + XP_DATA); |
4962 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { |
4963 | portp->imr &= ~IR_TXRDY; |
4964 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); |
4965 | outb(portp->imr, (ioaddr + XP_DATA)); |
4966 | clear_bit(ASYI_TXBUSY, &portp->istate); |
4967 | } else { |
4968 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); |
4969 | outb(mr0, (ioaddr + XP_DATA)); |
4970 | } |
4971 | } else { |
4972 | len = MIN(len, SC26198_TXFIFOSIZE); |
4973 | portp->stats.txtotal += len; |
4974 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
4975 | outb(GTXFIFO, (ioaddr + XP_ADDR)); |
4976 | outsb((ioaddr + XP_DATA), tail, stlen); |
4977 | len -= stlen; |
4978 | tail += stlen; |
4979 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
4980 | tail = portp->tx.buf; |
4981 | if (len > 0) { |
4982 | outsb((ioaddr + XP_DATA), tail, len); |
4983 | tail += len; |
4984 | } |
4985 | portp->tx.tail = tail; |
4986 | } |
4987 | } |
4988 | |
4989 | /*****************************************************************************/ |
4990 | |
4991 | /* |
4992 | * Receive character interrupt handler. Determine if we have good chars |
4993 | * or bad chars and then process appropriately. Good chars are easy |
4994 | * just shove the lot into the RX buffer and set all status byte to 0. |
4995 | * If a bad RX char then process as required. This routine needs to be |
4996 | * fast! In practice it is possible that we get an interrupt on a port |
4997 | * that is closed. This can happen on hangups - since they completely |
4998 | * shutdown a port not in user context. Need to handle this case. |
4999 | */ |
5000 | |
5001 | static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack) |
5002 | { |
5003 | struct tty_struct *tty; |
5004 | unsigned int len, buflen, ioaddr; |
5005 | |
5006 | #ifdef DEBUG |
5007 | printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack); |
5008 | #endif |
5009 | |
5010 | tty = portp->tty; |
5011 | ioaddr = portp->ioaddr; |
5012 | outb(GIBCR, (ioaddr + XP_ADDR)); |
5013 | len = inb(ioaddr + XP_DATA) + 1; |
5014 | |
5015 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { |
5016 | if ((tty == (struct tty_struct *) NULL) || |
5017 | (tty->flip.char_buf_ptr == (char *) NULL) || |
5018 | ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) { |
5019 | len = MIN(len, sizeof(stl_unwanted)); |
5020 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
5021 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); |
5022 | portp->stats.rxlost += len; |
5023 | portp->stats.rxtotal += len; |
5024 | } else { |
5025 | len = MIN(len, buflen); |
5026 | if (len > 0) { |
5027 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
5028 | insb((ioaddr + XP_DATA), tty->flip.char_buf_ptr, len); |
5029 | memset(tty->flip.flag_buf_ptr, 0, len); |
5030 | tty->flip.flag_buf_ptr += len; |
5031 | tty->flip.char_buf_ptr += len; |
5032 | tty->flip.count += len; |
5033 | tty_schedule_flip(tty); |
5034 | portp->stats.rxtotal += len; |
5035 | } |
5036 | } |
5037 | } else { |
5038 | stl_sc26198rxbadchars(portp); |
5039 | } |
5040 | |
5041 | /* |
5042 | * If we are TX flow controlled and in IXANY mode then we may need |
5043 | * to unflow control here. We gotta do this because of the automatic |
5044 | * flow control modes of the sc26198. |
5045 | */ |
5046 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { |
5047 | if ((tty != (struct tty_struct *) NULL) && |
5048 | (tty->termios != (struct termios *) NULL) && |
5049 | (tty->termios->c_iflag & IXANY)) { |
5050 | stl_sc26198txunflow(portp, tty); |
5051 | } |
5052 | } |
5053 | } |
5054 | |
5055 | /*****************************************************************************/ |
5056 | |
5057 | /* |
5058 | * Process an RX bad character. |
5059 | */ |
5060 | |
5061 | static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch) |
5062 | { |
5063 | struct tty_struct *tty; |
5064 | unsigned int ioaddr; |
5065 | |
5066 | tty = portp->tty; |
5067 | ioaddr = portp->ioaddr; |
5068 | |
5069 | if (status & SR_RXPARITY) |
5070 | portp->stats.rxparity++; |
5071 | if (status & SR_RXFRAMING) |
5072 | portp->stats.rxframing++; |
5073 | if (status & SR_RXOVERRUN) |
5074 | portp->stats.rxoverrun++; |
5075 | if (status & SR_RXBREAK) |
5076 | portp->stats.rxbreaks++; |
5077 | |
5078 | if ((tty != (struct tty_struct *) NULL) && |
5079 | ((portp->rxignoremsk & status) == 0)) { |
5080 | if (portp->rxmarkmsk & status) { |
5081 | if (status & SR_RXBREAK) { |
5082 | status = TTY_BREAK; |
5083 | if (portp->flags & ASYNC_SAK) { |
5084 | do_SAK(tty); |
5085 | BRDENABLE(portp->brdnr, portp->pagenr); |
5086 | } |
5087 | } else if (status & SR_RXPARITY) { |
5088 | status = TTY_PARITY; |
5089 | } else if (status & SR_RXFRAMING) { |
5090 | status = TTY_FRAME; |
5091 | } else if(status & SR_RXOVERRUN) { |
5092 | status = TTY_OVERRUN; |
5093 | } else { |
5094 | status = 0; |
5095 | } |
5096 | } else { |
5097 | status = 0; |
5098 | } |
5099 | |
5100 | if (tty->flip.char_buf_ptr != (char *) NULL) { |
5101 | if (tty->flip.count < TTY_FLIPBUF_SIZE) { |
5102 | *tty->flip.flag_buf_ptr++ = status; |
5103 | *tty->flip.char_buf_ptr++ = ch; |
5104 | tty->flip.count++; |
5105 | } |
5106 | tty_schedule_flip(tty); |
5107 | } |
5108 | |
5109 | if (status == 0) |
5110 | portp->stats.rxtotal++; |
5111 | } |
5112 | } |
5113 | |
5114 | /*****************************************************************************/ |
5115 | |
5116 | /* |
5117 | * Process all characters in the RX FIFO of the UART. Check all char |
5118 | * status bytes as well, and process as required. We need to check |
5119 | * all bytes in the FIFO, in case some more enter the FIFO while we |
5120 | * are here. To get the exact character error type we need to switch |
5121 | * into CHAR error mode (that is why we need to make sure we empty |
5122 | * the FIFO). |
5123 | */ |
5124 | |
5125 | static void stl_sc26198rxbadchars(stlport_t *portp) |
5126 | { |
5127 | unsigned char status, mr1; |
5128 | char ch; |
5129 | |
5130 | /* |
5131 | * To get the precise error type for each character we must switch |
5132 | * back into CHAR error mode. |
5133 | */ |
5134 | mr1 = stl_sc26198getreg(portp, MR1); |
5135 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); |
5136 | |
5137 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { |
5138 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); |
5139 | ch = stl_sc26198getreg(portp, RXFIFO); |
5140 | stl_sc26198rxbadch(portp, status, ch); |
5141 | } |
5142 | |
5143 | /* |
5144 | * To get correct interrupt class we must switch back into BLOCK |
5145 | * error mode. |
5146 | */ |
5147 | stl_sc26198setreg(portp, MR1, mr1); |
5148 | } |
5149 | |
5150 | /*****************************************************************************/ |
5151 | |
5152 | /* |
5153 | * Other interrupt handler. This includes modem signals, flow |
5154 | * control actions, etc. Most stuff is left to off-level interrupt |
5155 | * processing time. |
5156 | */ |
5157 | |
5158 | static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack) |
5159 | { |
5160 | unsigned char cir, ipr, xisr; |
5161 | |
5162 | #ifdef DEBUG |
5163 | printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack); |
5164 | #endif |
5165 | |
5166 | cir = stl_sc26198getglobreg(portp, CIR); |
5167 | |
5168 | switch (cir & CIR_SUBTYPEMASK) { |
5169 | case CIR_SUBCOS: |
5170 | ipr = stl_sc26198getreg(portp, IPR); |
5171 | if (ipr & IPR_DCDCHANGE) { |
5172 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
5173 | schedule_work(&portp->tqueue); |
5174 | portp->stats.modem++; |
5175 | } |
5176 | break; |
5177 | case CIR_SUBXONXOFF: |
5178 | xisr = stl_sc26198getreg(portp, XISR); |
5179 | if (xisr & XISR_RXXONGOT) { |
5180 | set_bit(ASYI_TXFLOWED, &portp->istate); |
5181 | portp->stats.txxoff++; |
5182 | } |
5183 | if (xisr & XISR_RXXOFFGOT) { |
5184 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
5185 | portp->stats.txxon++; |
5186 | } |
5187 | break; |
5188 | case CIR_SUBBREAK: |
5189 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); |
5190 | stl_sc26198rxbadchars(portp); |
5191 | break; |
5192 | default: |
5193 | break; |
5194 | } |
5195 | } |
5196 | |
5197 | /*****************************************************************************/ |