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1da177e4 LT |
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 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/slab.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/tty.h> | |
33 | #include <linux/tty_flip.h> | |
34 | #include <linux/serial.h> | |
35 | #include <linux/cd1400.h> | |
36 | #include <linux/sc26198.h> | |
37 | #include <linux/comstats.h> | |
38 | #include <linux/stallion.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/smp_lock.h> | |
1da177e4 LT |
42 | #include <linux/device.h> |
43 | #include <linux/delay.h> | |
44 | ||
45 | #include <asm/io.h> | |
46 | #include <asm/uaccess.h> | |
47 | ||
48 | #ifdef CONFIG_PCI | |
49 | #include <linux/pci.h> | |
50 | #endif | |
51 | ||
52 | /*****************************************************************************/ | |
53 | ||
54 | /* | |
55 | * Define different board types. Use the standard Stallion "assigned" | |
56 | * board numbers. Boards supported in this driver are abbreviated as | |
57 | * EIO = EasyIO and ECH = EasyConnection 8/32. | |
58 | */ | |
59 | #define BRD_EASYIO 20 | |
60 | #define BRD_ECH 21 | |
61 | #define BRD_ECHMC 22 | |
62 | #define BRD_ECHPCI 26 | |
63 | #define BRD_ECH64PCI 27 | |
64 | #define BRD_EASYIOPCI 28 | |
65 | ||
66 | /* | |
67 | * Define a configuration structure to hold the board configuration. | |
68 | * Need to set this up in the code (for now) with the boards that are | |
69 | * to be configured into the system. This is what needs to be modified | |
70 | * when adding/removing/modifying boards. Each line entry in the | |
71 | * stl_brdconf[] array is a board. Each line contains io/irq/memory | |
72 | * ranges for that board (as well as what type of board it is). | |
73 | * Some examples: | |
74 | * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, | |
75 | * This line would configure an EasyIO board (4 or 8, no difference), | |
76 | * at io address 2a0 and irq 10. | |
77 | * Another example: | |
78 | * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, | |
79 | * This line will configure an EasyConnection 8/32 board at primary io | |
80 | * address 2a8, secondary io address 280 and irq 12. | |
81 | * Enter as many lines into this array as you want (only the first 4 | |
82 | * will actually be used!). Any combination of EasyIO and EasyConnection | |
83 | * boards can be specified. EasyConnection 8/32 boards can share their | |
84 | * secondary io addresses between each other. | |
85 | * | |
86 | * NOTE: there is no need to put any entries in this table for PCI | |
87 | * boards. They will be found automatically by the driver - provided | |
88 | * PCI BIOS32 support is compiled into the kernel. | |
89 | */ | |
90 | ||
91 | typedef struct { | |
92 | int brdtype; | |
93 | int ioaddr1; | |
94 | int ioaddr2; | |
95 | unsigned long memaddr; | |
96 | int irq; | |
97 | int irqtype; | |
98 | } stlconf_t; | |
99 | ||
100 | static stlconf_t stl_brdconf[] = { | |
101 | /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/ | |
102 | }; | |
103 | ||
fe971071 | 104 | static int stl_nrbrds = ARRAY_SIZE(stl_brdconf); |
1da177e4 LT |
105 | |
106 | /*****************************************************************************/ | |
107 | ||
108 | /* | |
109 | * Define some important driver characteristics. Device major numbers | |
110 | * allocated as per Linux Device Registry. | |
111 | */ | |
112 | #ifndef STL_SIOMEMMAJOR | |
113 | #define STL_SIOMEMMAJOR 28 | |
114 | #endif | |
115 | #ifndef STL_SERIALMAJOR | |
116 | #define STL_SERIALMAJOR 24 | |
117 | #endif | |
118 | #ifndef STL_CALLOUTMAJOR | |
119 | #define STL_CALLOUTMAJOR 25 | |
120 | #endif | |
121 | ||
122 | /* | |
123 | * Set the TX buffer size. Bigger is better, but we don't want | |
124 | * to chew too much memory with buffers! | |
125 | */ | |
126 | #define STL_TXBUFLOW 512 | |
127 | #define STL_TXBUFSIZE 4096 | |
128 | ||
129 | /*****************************************************************************/ | |
130 | ||
131 | /* | |
132 | * Define our local driver identity first. Set up stuff to deal with | |
133 | * all the local structures required by a serial tty driver. | |
134 | */ | |
135 | static char *stl_drvtitle = "Stallion Multiport Serial Driver"; | |
136 | static char *stl_drvname = "stallion"; | |
137 | static char *stl_drvversion = "5.6.0"; | |
138 | ||
139 | static struct tty_driver *stl_serial; | |
140 | ||
1da177e4 LT |
141 | /* |
142 | * Define a local default termios struct. All ports will be created | |
143 | * with this termios initially. Basically all it defines is a raw port | |
144 | * at 9600, 8 data bits, 1 stop bit. | |
145 | */ | |
146 | static struct termios stl_deftermios = { | |
147 | .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), | |
148 | .c_cc = INIT_C_CC, | |
149 | }; | |
150 | ||
151 | /* | |
152 | * Define global stats structures. Not used often, and can be | |
153 | * re-used for each stats call. | |
154 | */ | |
155 | static comstats_t stl_comstats; | |
156 | static combrd_t stl_brdstats; | |
157 | static stlbrd_t stl_dummybrd; | |
158 | static stlport_t stl_dummyport; | |
159 | ||
160 | /* | |
161 | * Define global place to put buffer overflow characters. | |
162 | */ | |
163 | static char stl_unwanted[SC26198_RXFIFOSIZE]; | |
164 | ||
165 | /*****************************************************************************/ | |
166 | ||
167 | static stlbrd_t *stl_brds[STL_MAXBRDS]; | |
168 | ||
169 | /* | |
170 | * Per board state flags. Used with the state field of the board struct. | |
171 | * Not really much here! | |
172 | */ | |
173 | #define BRD_FOUND 0x1 | |
174 | ||
175 | /* | |
176 | * Define the port structure istate flags. These set of flags are | |
177 | * modified at interrupt time - so setting and reseting them needs | |
178 | * to be atomic. Use the bit clear/setting routines for this. | |
179 | */ | |
180 | #define ASYI_TXBUSY 1 | |
181 | #define ASYI_TXLOW 2 | |
182 | #define ASYI_DCDCHANGE 3 | |
183 | #define ASYI_TXFLOWED 4 | |
184 | ||
185 | /* | |
186 | * Define an array of board names as printable strings. Handy for | |
187 | * referencing boards when printing trace and stuff. | |
188 | */ | |
189 | static char *stl_brdnames[] = { | |
190 | (char *) NULL, | |
191 | (char *) NULL, | |
192 | (char *) NULL, | |
193 | (char *) NULL, | |
194 | (char *) NULL, | |
195 | (char *) NULL, | |
196 | (char *) NULL, | |
197 | (char *) NULL, | |
198 | (char *) NULL, | |
199 | (char *) NULL, | |
200 | (char *) NULL, | |
201 | (char *) NULL, | |
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 | "EasyIO", | |
211 | "EC8/32-AT", | |
212 | "EC8/32-MC", | |
213 | (char *) NULL, | |
214 | (char *) NULL, | |
215 | (char *) NULL, | |
216 | "EC8/32-PCI", | |
217 | "EC8/64-PCI", | |
218 | "EasyIO-PCI", | |
219 | }; | |
220 | ||
221 | /*****************************************************************************/ | |
222 | ||
223 | /* | |
224 | * Define some string labels for arguments passed from the module | |
225 | * load line. These allow for easy board definitions, and easy | |
226 | * modification of the io, memory and irq resoucres. | |
227 | */ | |
228 | static int stl_nargs = 0; | |
229 | static char *board0[4]; | |
230 | static char *board1[4]; | |
231 | static char *board2[4]; | |
232 | static char *board3[4]; | |
233 | ||
234 | static char **stl_brdsp[] = { | |
235 | (char **) &board0, | |
236 | (char **) &board1, | |
237 | (char **) &board2, | |
238 | (char **) &board3 | |
239 | }; | |
240 | ||
241 | /* | |
242 | * Define a set of common board names, and types. This is used to | |
243 | * parse any module arguments. | |
244 | */ | |
245 | ||
246 | typedef struct stlbrdtype { | |
247 | char *name; | |
248 | int type; | |
249 | } stlbrdtype_t; | |
250 | ||
251 | static stlbrdtype_t stl_brdstr[] = { | |
252 | { "easyio", BRD_EASYIO }, | |
253 | { "eio", BRD_EASYIO }, | |
254 | { "20", BRD_EASYIO }, | |
255 | { "ec8/32", BRD_ECH }, | |
256 | { "ec8/32-at", BRD_ECH }, | |
257 | { "ec8/32-isa", BRD_ECH }, | |
258 | { "ech", BRD_ECH }, | |
259 | { "echat", BRD_ECH }, | |
260 | { "21", BRD_ECH }, | |
261 | { "ec8/32-mc", BRD_ECHMC }, | |
262 | { "ec8/32-mca", BRD_ECHMC }, | |
263 | { "echmc", BRD_ECHMC }, | |
264 | { "echmca", BRD_ECHMC }, | |
265 | { "22", BRD_ECHMC }, | |
266 | { "ec8/32-pc", BRD_ECHPCI }, | |
267 | { "ec8/32-pci", BRD_ECHPCI }, | |
268 | { "26", BRD_ECHPCI }, | |
269 | { "ec8/64-pc", BRD_ECH64PCI }, | |
270 | { "ec8/64-pci", BRD_ECH64PCI }, | |
271 | { "ech-pci", BRD_ECH64PCI }, | |
272 | { "echpci", BRD_ECH64PCI }, | |
273 | { "echpc", BRD_ECH64PCI }, | |
274 | { "27", BRD_ECH64PCI }, | |
275 | { "easyio-pc", BRD_EASYIOPCI }, | |
276 | { "easyio-pci", BRD_EASYIOPCI }, | |
277 | { "eio-pci", BRD_EASYIOPCI }, | |
278 | { "eiopci", BRD_EASYIOPCI }, | |
279 | { "28", BRD_EASYIOPCI }, | |
280 | }; | |
281 | ||
282 | /* | |
283 | * Define the module agruments. | |
284 | */ | |
285 | MODULE_AUTHOR("Greg Ungerer"); | |
286 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); | |
287 | MODULE_LICENSE("GPL"); | |
288 | ||
289 | module_param_array(board0, charp, &stl_nargs, 0); | |
290 | MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
291 | module_param_array(board1, charp, &stl_nargs, 0); | |
292 | MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
293 | module_param_array(board2, charp, &stl_nargs, 0); | |
294 | MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
295 | module_param_array(board3, charp, &stl_nargs, 0); | |
296 | MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
297 | ||
298 | /*****************************************************************************/ | |
299 | ||
300 | /* | |
301 | * Hardware ID bits for the EasyIO and ECH boards. These defines apply | |
302 | * to the directly accessible io ports of these boards (not the uarts - | |
303 | * they are in cd1400.h and sc26198.h). | |
304 | */ | |
305 | #define EIO_8PORTRS 0x04 | |
306 | #define EIO_4PORTRS 0x05 | |
307 | #define EIO_8PORTDI 0x00 | |
308 | #define EIO_8PORTM 0x06 | |
309 | #define EIO_MK3 0x03 | |
310 | #define EIO_IDBITMASK 0x07 | |
311 | ||
312 | #define EIO_BRDMASK 0xf0 | |
313 | #define ID_BRD4 0x10 | |
314 | #define ID_BRD8 0x20 | |
315 | #define ID_BRD16 0x30 | |
316 | ||
317 | #define EIO_INTRPEND 0x08 | |
318 | #define EIO_INTEDGE 0x00 | |
319 | #define EIO_INTLEVEL 0x08 | |
320 | #define EIO_0WS 0x10 | |
321 | ||
322 | #define ECH_ID 0xa0 | |
323 | #define ECH_IDBITMASK 0xe0 | |
324 | #define ECH_BRDENABLE 0x08 | |
325 | #define ECH_BRDDISABLE 0x00 | |
326 | #define ECH_INTENABLE 0x01 | |
327 | #define ECH_INTDISABLE 0x00 | |
328 | #define ECH_INTLEVEL 0x02 | |
329 | #define ECH_INTEDGE 0x00 | |
330 | #define ECH_INTRPEND 0x01 | |
331 | #define ECH_BRDRESET 0x01 | |
332 | ||
333 | #define ECHMC_INTENABLE 0x01 | |
334 | #define ECHMC_BRDRESET 0x02 | |
335 | ||
336 | #define ECH_PNLSTATUS 2 | |
337 | #define ECH_PNL16PORT 0x20 | |
338 | #define ECH_PNLIDMASK 0x07 | |
339 | #define ECH_PNLXPID 0x40 | |
340 | #define ECH_PNLINTRPEND 0x80 | |
341 | ||
342 | #define ECH_ADDR2MASK 0x1e0 | |
343 | ||
344 | /* | |
345 | * Define the vector mapping bits for the programmable interrupt board | |
346 | * hardware. These bits encode the interrupt for the board to use - it | |
347 | * is software selectable (except the EIO-8M). | |
348 | */ | |
349 | static unsigned char stl_vecmap[] = { | |
350 | 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, | |
351 | 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 | |
352 | }; | |
353 | ||
b65b5b59 AC |
354 | /* |
355 | * Lock ordering is that you may not take stallion_lock holding | |
356 | * brd_lock. | |
357 | */ | |
358 | ||
359 | static spinlock_t brd_lock; /* Guard the board mapping */ | |
360 | static spinlock_t stallion_lock; /* Guard the tty driver */ | |
361 | ||
1da177e4 LT |
362 | /* |
363 | * Set up enable and disable macros for the ECH boards. They require | |
364 | * the secondary io address space to be activated and deactivated. | |
365 | * This way all ECH boards can share their secondary io region. | |
366 | * If this is an ECH-PCI board then also need to set the page pointer | |
367 | * to point to the correct page. | |
368 | */ | |
369 | #define BRDENABLE(brdnr,pagenr) \ | |
370 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ | |
371 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ | |
372 | stl_brds[(brdnr)]->ioctrl); \ | |
373 | else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ | |
374 | outb((pagenr), stl_brds[(brdnr)]->ioctrl); | |
375 | ||
376 | #define BRDDISABLE(brdnr) \ | |
377 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ | |
378 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ | |
379 | stl_brds[(brdnr)]->ioctrl); | |
380 | ||
381 | #define STL_CD1400MAXBAUD 230400 | |
382 | #define STL_SC26198MAXBAUD 460800 | |
383 | ||
384 | #define STL_BAUDBASE 115200 | |
385 | #define STL_CLOSEDELAY (5 * HZ / 10) | |
386 | ||
387 | /*****************************************************************************/ | |
388 | ||
389 | #ifdef CONFIG_PCI | |
390 | ||
391 | /* | |
392 | * Define the Stallion PCI vendor and device IDs. | |
393 | */ | |
394 | #ifndef PCI_VENDOR_ID_STALLION | |
395 | #define PCI_VENDOR_ID_STALLION 0x124d | |
396 | #endif | |
397 | #ifndef PCI_DEVICE_ID_ECHPCI832 | |
398 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 | |
399 | #endif | |
400 | #ifndef PCI_DEVICE_ID_ECHPCI864 | |
401 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 | |
402 | #endif | |
403 | #ifndef PCI_DEVICE_ID_EIOPCI | |
404 | #define PCI_DEVICE_ID_EIOPCI 0x0003 | |
405 | #endif | |
406 | ||
407 | /* | |
408 | * Define structure to hold all Stallion PCI boards. | |
409 | */ | |
410 | typedef struct stlpcibrd { | |
411 | unsigned short vendid; | |
412 | unsigned short devid; | |
413 | int brdtype; | |
414 | } stlpcibrd_t; | |
415 | ||
416 | static stlpcibrd_t stl_pcibrds[] = { | |
417 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI }, | |
418 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI }, | |
419 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI }, | |
420 | { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI }, | |
421 | }; | |
422 | ||
fe971071 | 423 | static int stl_nrpcibrds = ARRAY_SIZE(stl_pcibrds); |
1da177e4 LT |
424 | |
425 | #endif | |
426 | ||
427 | /*****************************************************************************/ | |
428 | ||
429 | /* | |
430 | * Define macros to extract a brd/port number from a minor number. | |
431 | */ | |
432 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) | |
433 | #define MINOR2PORT(min) ((min) & 0x3f) | |
434 | ||
435 | /* | |
436 | * Define a baud rate table that converts termios baud rate selector | |
437 | * into the actual baud rate value. All baud rate calculations are | |
438 | * based on the actual baud rate required. | |
439 | */ | |
440 | static unsigned int stl_baudrates[] = { | |
441 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
442 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 | |
443 | }; | |
444 | ||
445 | /* | |
446 | * Define some handy local macros... | |
447 | */ | |
448 | #undef MIN | |
449 | #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) | |
450 | ||
451 | #undef TOLOWER | |
452 | #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) | |
453 | ||
454 | /*****************************************************************************/ | |
455 | ||
456 | /* | |
457 | * Declare all those functions in this driver! | |
458 | */ | |
459 | ||
460 | static void stl_argbrds(void); | |
461 | static int stl_parsebrd(stlconf_t *confp, char **argp); | |
462 | ||
463 | static unsigned long stl_atol(char *str); | |
464 | ||
408b664a | 465 | static int stl_init(void); |
1da177e4 LT |
466 | static int stl_open(struct tty_struct *tty, struct file *filp); |
467 | static void stl_close(struct tty_struct *tty, struct file *filp); | |
468 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count); | |
469 | static void stl_putchar(struct tty_struct *tty, unsigned char ch); | |
470 | static void stl_flushchars(struct tty_struct *tty); | |
471 | static int stl_writeroom(struct tty_struct *tty); | |
472 | static int stl_charsinbuffer(struct tty_struct *tty); | |
473 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); | |
474 | static void stl_settermios(struct tty_struct *tty, struct termios *old); | |
475 | static void stl_throttle(struct tty_struct *tty); | |
476 | static void stl_unthrottle(struct tty_struct *tty); | |
477 | static void stl_stop(struct tty_struct *tty); | |
478 | static void stl_start(struct tty_struct *tty); | |
479 | static void stl_flushbuffer(struct tty_struct *tty); | |
480 | static void stl_breakctl(struct tty_struct *tty, int state); | |
481 | static void stl_waituntilsent(struct tty_struct *tty, int timeout); | |
482 | static void stl_sendxchar(struct tty_struct *tty, char ch); | |
483 | static void stl_hangup(struct tty_struct *tty); | |
484 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); | |
485 | static int stl_portinfo(stlport_t *portp, int portnr, char *pos); | |
486 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data); | |
487 | ||
488 | static int stl_brdinit(stlbrd_t *brdp); | |
489 | static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp); | |
490 | static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp); | |
491 | static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp); | |
492 | static int stl_getbrdstats(combrd_t __user *bp); | |
493 | static int stl_getportstats(stlport_t *portp, comstats_t __user *cp); | |
494 | static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp); | |
495 | static int stl_getportstruct(stlport_t __user *arg); | |
496 | static int stl_getbrdstruct(stlbrd_t __user *arg); | |
497 | static int stl_waitcarrier(stlport_t *portp, struct file *filp); | |
498 | static int stl_eiointr(stlbrd_t *brdp); | |
499 | static int stl_echatintr(stlbrd_t *brdp); | |
500 | static int stl_echmcaintr(stlbrd_t *brdp); | |
501 | static int stl_echpciintr(stlbrd_t *brdp); | |
502 | static int stl_echpci64intr(stlbrd_t *brdp); | |
3e577a80 | 503 | static void stl_offintr(struct work_struct *); |
1da177e4 LT |
504 | static stlbrd_t *stl_allocbrd(void); |
505 | static stlport_t *stl_getport(int brdnr, int panelnr, int portnr); | |
506 | ||
507 | static inline int stl_initbrds(void); | |
508 | static inline int stl_initeio(stlbrd_t *brdp); | |
509 | static inline int stl_initech(stlbrd_t *brdp); | |
510 | static inline int stl_getbrdnr(void); | |
511 | ||
512 | #ifdef CONFIG_PCI | |
513 | static inline int stl_findpcibrds(void); | |
514 | static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp); | |
515 | #endif | |
516 | ||
517 | /* | |
518 | * CD1400 uart specific handling functions. | |
519 | */ | |
520 | static void stl_cd1400setreg(stlport_t *portp, int regnr, int value); | |
521 | static int stl_cd1400getreg(stlport_t *portp, int regnr); | |
522 | static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value); | |
523 | static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp); | |
524 | static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); | |
525 | static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp); | |
526 | static int stl_cd1400getsignals(stlport_t *portp); | |
527 | static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts); | |
528 | static void stl_cd1400ccrwait(stlport_t *portp); | |
529 | static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx); | |
530 | static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx); | |
531 | static void stl_cd1400disableintrs(stlport_t *portp); | |
532 | static void stl_cd1400sendbreak(stlport_t *portp, int len); | |
533 | static void stl_cd1400flowctrl(stlport_t *portp, int state); | |
534 | static void stl_cd1400sendflow(stlport_t *portp, int state); | |
535 | static void stl_cd1400flush(stlport_t *portp); | |
536 | static int stl_cd1400datastate(stlport_t *portp); | |
537 | static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase); | |
538 | static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase); | |
539 | static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr); | |
540 | static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr); | |
541 | static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr); | |
542 | ||
543 | static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr); | |
544 | ||
545 | /* | |
546 | * SC26198 uart specific handling functions. | |
547 | */ | |
548 | static void stl_sc26198setreg(stlport_t *portp, int regnr, int value); | |
549 | static int stl_sc26198getreg(stlport_t *portp, int regnr); | |
550 | static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value); | |
551 | static int stl_sc26198getglobreg(stlport_t *portp, int regnr); | |
552 | static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp); | |
553 | static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); | |
554 | static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp); | |
555 | static int stl_sc26198getsignals(stlport_t *portp); | |
556 | static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts); | |
557 | static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx); | |
558 | static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx); | |
559 | static void stl_sc26198disableintrs(stlport_t *portp); | |
560 | static void stl_sc26198sendbreak(stlport_t *portp, int len); | |
561 | static void stl_sc26198flowctrl(stlport_t *portp, int state); | |
562 | static void stl_sc26198sendflow(stlport_t *portp, int state); | |
563 | static void stl_sc26198flush(stlport_t *portp); | |
564 | static int stl_sc26198datastate(stlport_t *portp); | |
565 | static void stl_sc26198wait(stlport_t *portp); | |
566 | static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty); | |
567 | static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase); | |
568 | static void stl_sc26198txisr(stlport_t *port); | |
569 | static void stl_sc26198rxisr(stlport_t *port, unsigned int iack); | |
570 | static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch); | |
571 | static void stl_sc26198rxbadchars(stlport_t *portp); | |
572 | static void stl_sc26198otherisr(stlport_t *port, unsigned int iack); | |
573 | ||
574 | /*****************************************************************************/ | |
575 | ||
576 | /* | |
577 | * Generic UART support structure. | |
578 | */ | |
579 | typedef struct uart { | |
580 | int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp); | |
581 | void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); | |
582 | void (*setport)(stlport_t *portp, struct termios *tiosp); | |
583 | int (*getsignals)(stlport_t *portp); | |
584 | void (*setsignals)(stlport_t *portp, int dtr, int rts); | |
585 | void (*enablerxtx)(stlport_t *portp, int rx, int tx); | |
586 | void (*startrxtx)(stlport_t *portp, int rx, int tx); | |
587 | void (*disableintrs)(stlport_t *portp); | |
588 | void (*sendbreak)(stlport_t *portp, int len); | |
589 | void (*flowctrl)(stlport_t *portp, int state); | |
590 | void (*sendflow)(stlport_t *portp, int state); | |
591 | void (*flush)(stlport_t *portp); | |
592 | int (*datastate)(stlport_t *portp); | |
593 | void (*intr)(stlpanel_t *panelp, unsigned int iobase); | |
594 | } uart_t; | |
595 | ||
596 | /* | |
597 | * Define some macros to make calling these functions nice and clean. | |
598 | */ | |
599 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) | |
600 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) | |
601 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) | |
602 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) | |
603 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) | |
604 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) | |
605 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) | |
606 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) | |
607 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) | |
608 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) | |
609 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) | |
610 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) | |
611 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) | |
612 | ||
613 | /*****************************************************************************/ | |
614 | ||
615 | /* | |
616 | * CD1400 UART specific data initialization. | |
617 | */ | |
618 | static uart_t stl_cd1400uart = { | |
619 | stl_cd1400panelinit, | |
620 | stl_cd1400portinit, | |
621 | stl_cd1400setport, | |
622 | stl_cd1400getsignals, | |
623 | stl_cd1400setsignals, | |
624 | stl_cd1400enablerxtx, | |
625 | stl_cd1400startrxtx, | |
626 | stl_cd1400disableintrs, | |
627 | stl_cd1400sendbreak, | |
628 | stl_cd1400flowctrl, | |
629 | stl_cd1400sendflow, | |
630 | stl_cd1400flush, | |
631 | stl_cd1400datastate, | |
632 | stl_cd1400eiointr | |
633 | }; | |
634 | ||
635 | /* | |
636 | * Define the offsets within the register bank of a cd1400 based panel. | |
637 | * These io address offsets are common to the EasyIO board as well. | |
638 | */ | |
639 | #define EREG_ADDR 0 | |
640 | #define EREG_DATA 4 | |
641 | #define EREG_RXACK 5 | |
642 | #define EREG_TXACK 6 | |
643 | #define EREG_MDACK 7 | |
644 | ||
645 | #define EREG_BANKSIZE 8 | |
646 | ||
647 | #define CD1400_CLK 25000000 | |
648 | #define CD1400_CLK8M 20000000 | |
649 | ||
650 | /* | |
651 | * Define the cd1400 baud rate clocks. These are used when calculating | |
652 | * what clock and divisor to use for the required baud rate. Also | |
653 | * define the maximum baud rate allowed, and the default base baud. | |
654 | */ | |
655 | static int stl_cd1400clkdivs[] = { | |
656 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 | |
657 | }; | |
658 | ||
659 | /*****************************************************************************/ | |
660 | ||
661 | /* | |
662 | * SC26198 UART specific data initization. | |
663 | */ | |
664 | static uart_t stl_sc26198uart = { | |
665 | stl_sc26198panelinit, | |
666 | stl_sc26198portinit, | |
667 | stl_sc26198setport, | |
668 | stl_sc26198getsignals, | |
669 | stl_sc26198setsignals, | |
670 | stl_sc26198enablerxtx, | |
671 | stl_sc26198startrxtx, | |
672 | stl_sc26198disableintrs, | |
673 | stl_sc26198sendbreak, | |
674 | stl_sc26198flowctrl, | |
675 | stl_sc26198sendflow, | |
676 | stl_sc26198flush, | |
677 | stl_sc26198datastate, | |
678 | stl_sc26198intr | |
679 | }; | |
680 | ||
681 | /* | |
682 | * Define the offsets within the register bank of a sc26198 based panel. | |
683 | */ | |
684 | #define XP_DATA 0 | |
685 | #define XP_ADDR 1 | |
686 | #define XP_MODID 2 | |
687 | #define XP_STATUS 2 | |
688 | #define XP_IACK 3 | |
689 | ||
690 | #define XP_BANKSIZE 4 | |
691 | ||
692 | /* | |
693 | * Define the sc26198 baud rate table. Offsets within the table | |
694 | * represent the actual baud rate selector of sc26198 registers. | |
695 | */ | |
696 | static unsigned int sc26198_baudtable[] = { | |
697 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, | |
698 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, | |
699 | 230400, 460800, 921600 | |
700 | }; | |
701 | ||
fe971071 | 702 | #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable) |
1da177e4 LT |
703 | |
704 | /*****************************************************************************/ | |
705 | ||
706 | /* | |
707 | * Define the driver info for a user level control device. Used mainly | |
708 | * to get at port stats - only not using the port device itself. | |
709 | */ | |
62322d25 | 710 | static const struct file_operations stl_fsiomem = { |
1da177e4 LT |
711 | .owner = THIS_MODULE, |
712 | .ioctl = stl_memioctl, | |
713 | }; | |
714 | ||
715 | /*****************************************************************************/ | |
716 | ||
ca8eca68 | 717 | static struct class *stallion_class; |
1da177e4 LT |
718 | |
719 | /* | |
720 | * Loadable module initialization stuff. | |
721 | */ | |
722 | ||
723 | static int __init stallion_module_init(void) | |
724 | { | |
1da177e4 | 725 | stl_init(); |
014c2544 | 726 | return 0; |
1da177e4 LT |
727 | } |
728 | ||
729 | /*****************************************************************************/ | |
730 | ||
731 | static void __exit stallion_module_exit(void) | |
732 | { | |
733 | stlbrd_t *brdp; | |
734 | stlpanel_t *panelp; | |
735 | stlport_t *portp; | |
1da177e4 LT |
736 | int i, j, k; |
737 | ||
738 | #ifdef DEBUG | |
739 | printk("cleanup_module()\n"); | |
740 | #endif | |
741 | ||
742 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, | |
743 | stl_drvversion); | |
744 | ||
1da177e4 LT |
745 | /* |
746 | * Free up all allocated resources used by the ports. This includes | |
747 | * memory and interrupts. As part of this process we will also do | |
748 | * a hangup on every open port - to try to flush out any processes | |
749 | * hanging onto ports. | |
750 | */ | |
751 | i = tty_unregister_driver(stl_serial); | |
752 | put_tty_driver(stl_serial); | |
753 | if (i) { | |
754 | printk("STALLION: failed to un-register tty driver, " | |
755 | "errno=%d\n", -i); | |
1da177e4 LT |
756 | return; |
757 | } | |
8ab5e4c1 | 758 | for (i = 0; i < 4; i++) |
ca8eca68 | 759 | class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); |
1da177e4 LT |
760 | if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) |
761 | printk("STALLION: failed to un-register serial memory device, " | |
762 | "errno=%d\n", -i); | |
ca8eca68 | 763 | class_destroy(stallion_class); |
1da177e4 | 764 | |
1da177e4 LT |
765 | for (i = 0; (i < stl_nrbrds); i++) { |
766 | if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) | |
767 | continue; | |
768 | ||
769 | free_irq(brdp->irq, brdp); | |
770 | ||
771 | for (j = 0; (j < STL_MAXPANELS); j++) { | |
772 | panelp = brdp->panels[j]; | |
773 | if (panelp == (stlpanel_t *) NULL) | |
774 | continue; | |
775 | for (k = 0; (k < STL_PORTSPERPANEL); k++) { | |
776 | portp = panelp->ports[k]; | |
777 | if (portp == (stlport_t *) NULL) | |
778 | continue; | |
779 | if (portp->tty != (struct tty_struct *) NULL) | |
780 | stl_hangup(portp->tty); | |
735d5661 | 781 | kfree(portp->tx.buf); |
1da177e4 LT |
782 | kfree(portp); |
783 | } | |
784 | kfree(panelp); | |
785 | } | |
786 | ||
787 | release_region(brdp->ioaddr1, brdp->iosize1); | |
788 | if (brdp->iosize2 > 0) | |
789 | release_region(brdp->ioaddr2, brdp->iosize2); | |
790 | ||
791 | kfree(brdp); | |
792 | stl_brds[i] = (stlbrd_t *) NULL; | |
793 | } | |
1da177e4 LT |
794 | } |
795 | ||
796 | module_init(stallion_module_init); | |
797 | module_exit(stallion_module_exit); | |
798 | ||
799 | /*****************************************************************************/ | |
800 | ||
801 | /* | |
802 | * Check for any arguments passed in on the module load command line. | |
803 | */ | |
804 | ||
805 | static void stl_argbrds(void) | |
806 | { | |
807 | stlconf_t conf; | |
808 | stlbrd_t *brdp; | |
809 | int i; | |
810 | ||
811 | #ifdef DEBUG | |
812 | printk("stl_argbrds()\n"); | |
813 | #endif | |
814 | ||
815 | for (i = stl_nrbrds; (i < stl_nargs); i++) { | |
816 | memset(&conf, 0, sizeof(conf)); | |
817 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) | |
818 | continue; | |
819 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) | |
820 | continue; | |
821 | stl_nrbrds = i + 1; | |
822 | brdp->brdnr = i; | |
823 | brdp->brdtype = conf.brdtype; | |
824 | brdp->ioaddr1 = conf.ioaddr1; | |
825 | brdp->ioaddr2 = conf.ioaddr2; | |
826 | brdp->irq = conf.irq; | |
827 | brdp->irqtype = conf.irqtype; | |
828 | stl_brdinit(brdp); | |
829 | } | |
830 | } | |
831 | ||
832 | /*****************************************************************************/ | |
833 | ||
834 | /* | |
835 | * Convert an ascii string number into an unsigned long. | |
836 | */ | |
837 | ||
838 | static unsigned long stl_atol(char *str) | |
839 | { | |
840 | unsigned long val; | |
841 | int base, c; | |
842 | char *sp; | |
843 | ||
844 | val = 0; | |
845 | sp = str; | |
846 | if ((*sp == '0') && (*(sp+1) == 'x')) { | |
847 | base = 16; | |
848 | sp += 2; | |
849 | } else if (*sp == '0') { | |
850 | base = 8; | |
851 | sp++; | |
852 | } else { | |
853 | base = 10; | |
854 | } | |
855 | ||
856 | for (; (*sp != 0); sp++) { | |
857 | c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); | |
858 | if ((c < 0) || (c >= base)) { | |
859 | printk("STALLION: invalid argument %s\n", str); | |
860 | val = 0; | |
861 | break; | |
862 | } | |
863 | val = (val * base) + c; | |
864 | } | |
014c2544 | 865 | return val; |
1da177e4 LT |
866 | } |
867 | ||
868 | /*****************************************************************************/ | |
869 | ||
870 | /* | |
871 | * Parse the supplied argument string, into the board conf struct. | |
872 | */ | |
873 | ||
874 | static int stl_parsebrd(stlconf_t *confp, char **argp) | |
875 | { | |
876 | char *sp; | |
fe971071 | 877 | int i; |
1da177e4 LT |
878 | |
879 | #ifdef DEBUG | |
880 | printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp); | |
881 | #endif | |
882 | ||
883 | if ((argp[0] == (char *) NULL) || (*argp[0] == 0)) | |
014c2544 | 884 | return 0; |
1da177e4 LT |
885 | |
886 | for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) | |
887 | *sp = TOLOWER(*sp); | |
888 | ||
fe971071 | 889 | for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) { |
1da177e4 LT |
890 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
891 | break; | |
892 | } | |
fe971071 | 893 | if (i == ARRAY_SIZE(stl_brdstr)) { |
1da177e4 | 894 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
fe971071 | 895 | return 0; |
1da177e4 LT |
896 | } |
897 | ||
898 | confp->brdtype = stl_brdstr[i].type; | |
899 | ||
900 | i = 1; | |
901 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) | |
902 | confp->ioaddr1 = stl_atol(argp[i]); | |
903 | i++; | |
904 | if (confp->brdtype == BRD_ECH) { | |
905 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) | |
906 | confp->ioaddr2 = stl_atol(argp[i]); | |
907 | i++; | |
908 | } | |
909 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) | |
910 | confp->irq = stl_atol(argp[i]); | |
014c2544 | 911 | return 1; |
1da177e4 LT |
912 | } |
913 | ||
914 | /*****************************************************************************/ | |
915 | ||
1da177e4 LT |
916 | /* |
917 | * Allocate a new board structure. Fill out the basic info in it. | |
918 | */ | |
919 | ||
920 | static stlbrd_t *stl_allocbrd(void) | |
921 | { | |
922 | stlbrd_t *brdp; | |
923 | ||
b0b4ed72 TK |
924 | brdp = kzalloc(sizeof(stlbrd_t), GFP_KERNEL); |
925 | if (!brdp) { | |
b65b5b59 | 926 | printk("STALLION: failed to allocate memory (size=%Zd)\n", |
1da177e4 | 927 | sizeof(stlbrd_t)); |
b0b4ed72 | 928 | return NULL; |
1da177e4 LT |
929 | } |
930 | ||
1da177e4 | 931 | brdp->magic = STL_BOARDMAGIC; |
014c2544 | 932 | return brdp; |
1da177e4 LT |
933 | } |
934 | ||
935 | /*****************************************************************************/ | |
936 | ||
937 | static int stl_open(struct tty_struct *tty, struct file *filp) | |
938 | { | |
939 | stlport_t *portp; | |
940 | stlbrd_t *brdp; | |
941 | unsigned int minordev; | |
942 | int brdnr, panelnr, portnr, rc; | |
943 | ||
944 | #ifdef DEBUG | |
945 | printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty, | |
946 | (int) filp, tty->name); | |
947 | #endif | |
948 | ||
949 | minordev = tty->index; | |
950 | brdnr = MINOR2BRD(minordev); | |
951 | if (brdnr >= stl_nrbrds) | |
014c2544 | 952 | return -ENODEV; |
1da177e4 LT |
953 | brdp = stl_brds[brdnr]; |
954 | if (brdp == (stlbrd_t *) NULL) | |
014c2544 | 955 | return -ENODEV; |
1da177e4 LT |
956 | minordev = MINOR2PORT(minordev); |
957 | for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { | |
958 | if (brdp->panels[panelnr] == (stlpanel_t *) NULL) | |
959 | break; | |
960 | if (minordev < brdp->panels[panelnr]->nrports) { | |
961 | portnr = minordev; | |
962 | break; | |
963 | } | |
964 | minordev -= brdp->panels[panelnr]->nrports; | |
965 | } | |
966 | if (portnr < 0) | |
014c2544 | 967 | return -ENODEV; |
1da177e4 LT |
968 | |
969 | portp = brdp->panels[panelnr]->ports[portnr]; | |
970 | if (portp == (stlport_t *) NULL) | |
014c2544 | 971 | return -ENODEV; |
1da177e4 LT |
972 | |
973 | /* | |
974 | * On the first open of the device setup the port hardware, and | |
975 | * initialize the per port data structure. | |
976 | */ | |
977 | portp->tty = tty; | |
978 | tty->driver_data = portp; | |
979 | portp->refcount++; | |
980 | ||
981 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { | |
b0b4ed72 TK |
982 | if (!portp->tx.buf) { |
983 | portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); | |
984 | if (!portp->tx.buf) | |
014c2544 | 985 | return -ENOMEM; |
1da177e4 LT |
986 | portp->tx.head = portp->tx.buf; |
987 | portp->tx.tail = portp->tx.buf; | |
988 | } | |
989 | stl_setport(portp, tty->termios); | |
990 | portp->sigs = stl_getsignals(portp); | |
991 | stl_setsignals(portp, 1, 1); | |
992 | stl_enablerxtx(portp, 1, 1); | |
993 | stl_startrxtx(portp, 1, 0); | |
994 | clear_bit(TTY_IO_ERROR, &tty->flags); | |
995 | portp->flags |= ASYNC_INITIALIZED; | |
996 | } | |
997 | ||
998 | /* | |
999 | * Check if this port is in the middle of closing. If so then wait | |
1000 | * until it is closed then return error status, based on flag settings. | |
1001 | * The sleep here does not need interrupt protection since the wakeup | |
1002 | * for it is done with the same context. | |
1003 | */ | |
1004 | if (portp->flags & ASYNC_CLOSING) { | |
1005 | interruptible_sleep_on(&portp->close_wait); | |
1006 | if (portp->flags & ASYNC_HUP_NOTIFY) | |
014c2544 JJ |
1007 | return -EAGAIN; |
1008 | return -ERESTARTSYS; | |
1da177e4 LT |
1009 | } |
1010 | ||
1011 | /* | |
1012 | * Based on type of open being done check if it can overlap with any | |
1013 | * previous opens still in effect. If we are a normal serial device | |
1014 | * then also we might have to wait for carrier. | |
1015 | */ | |
1016 | if (!(filp->f_flags & O_NONBLOCK)) { | |
1017 | if ((rc = stl_waitcarrier(portp, filp)) != 0) | |
014c2544 | 1018 | return rc; |
1da177e4 LT |
1019 | } |
1020 | portp->flags |= ASYNC_NORMAL_ACTIVE; | |
1021 | ||
014c2544 | 1022 | return 0; |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | /*****************************************************************************/ | |
1026 | ||
1027 | /* | |
1028 | * Possibly need to wait for carrier (DCD signal) to come high. Say | |
1029 | * maybe because if we are clocal then we don't need to wait... | |
1030 | */ | |
1031 | ||
1032 | static int stl_waitcarrier(stlport_t *portp, struct file *filp) | |
1033 | { | |
1034 | unsigned long flags; | |
1035 | int rc, doclocal; | |
1036 | ||
1037 | #ifdef DEBUG | |
1038 | printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp); | |
1039 | #endif | |
1040 | ||
1041 | rc = 0; | |
1042 | doclocal = 0; | |
1043 | ||
b65b5b59 AC |
1044 | spin_lock_irqsave(&stallion_lock, flags); |
1045 | ||
1da177e4 LT |
1046 | if (portp->tty->termios->c_cflag & CLOCAL) |
1047 | doclocal++; | |
1048 | ||
1da177e4 LT |
1049 | portp->openwaitcnt++; |
1050 | if (! tty_hung_up_p(filp)) | |
1051 | portp->refcount--; | |
1052 | ||
1053 | for (;;) { | |
b65b5b59 | 1054 | /* Takes brd_lock internally */ |
1da177e4 LT |
1055 | stl_setsignals(portp, 1, 1); |
1056 | if (tty_hung_up_p(filp) || | |
1057 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { | |
1058 | if (portp->flags & ASYNC_HUP_NOTIFY) | |
1059 | rc = -EBUSY; | |
1060 | else | |
1061 | rc = -ERESTARTSYS; | |
1062 | break; | |
1063 | } | |
1064 | if (((portp->flags & ASYNC_CLOSING) == 0) && | |
1065 | (doclocal || (portp->sigs & TIOCM_CD))) { | |
1066 | break; | |
1067 | } | |
1068 | if (signal_pending(current)) { | |
1069 | rc = -ERESTARTSYS; | |
1070 | break; | |
1071 | } | |
b65b5b59 | 1072 | /* FIXME */ |
1da177e4 LT |
1073 | interruptible_sleep_on(&portp->open_wait); |
1074 | } | |
1075 | ||
1076 | if (! tty_hung_up_p(filp)) | |
1077 | portp->refcount++; | |
1078 | portp->openwaitcnt--; | |
b65b5b59 | 1079 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 | 1080 | |
014c2544 | 1081 | return rc; |
1da177e4 LT |
1082 | } |
1083 | ||
1084 | /*****************************************************************************/ | |
1085 | ||
1086 | static void stl_close(struct tty_struct *tty, struct file *filp) | |
1087 | { | |
1088 | stlport_t *portp; | |
1089 | unsigned long flags; | |
1090 | ||
1091 | #ifdef DEBUG | |
1092 | printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp); | |
1093 | #endif | |
1094 | ||
1095 | portp = tty->driver_data; | |
1096 | if (portp == (stlport_t *) NULL) | |
1097 | return; | |
1098 | ||
b65b5b59 | 1099 | spin_lock_irqsave(&stallion_lock, flags); |
1da177e4 | 1100 | if (tty_hung_up_p(filp)) { |
b65b5b59 | 1101 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
1102 | return; |
1103 | } | |
1104 | if ((tty->count == 1) && (portp->refcount != 1)) | |
1105 | portp->refcount = 1; | |
1106 | if (portp->refcount-- > 1) { | |
b65b5b59 | 1107 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
1108 | return; |
1109 | } | |
1110 | ||
1111 | portp->refcount = 0; | |
1112 | portp->flags |= ASYNC_CLOSING; | |
1113 | ||
1114 | /* | |
1115 | * May want to wait for any data to drain before closing. The BUSY | |
1116 | * flag keeps track of whether we are still sending or not - it is | |
1117 | * very accurate for the cd1400, not quite so for the sc26198. | |
1118 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) | |
1119 | */ | |
1120 | tty->closing = 1; | |
b65b5b59 AC |
1121 | |
1122 | spin_unlock_irqrestore(&stallion_lock, flags); | |
1123 | ||
1da177e4 LT |
1124 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1125 | tty_wait_until_sent(tty, portp->closing_wait); | |
1126 | stl_waituntilsent(tty, (HZ / 2)); | |
1127 | ||
b65b5b59 AC |
1128 | |
1129 | spin_lock_irqsave(&stallion_lock, flags); | |
1da177e4 | 1130 | portp->flags &= ~ASYNC_INITIALIZED; |
b65b5b59 AC |
1131 | spin_unlock_irqrestore(&stallion_lock, flags); |
1132 | ||
1da177e4 LT |
1133 | stl_disableintrs(portp); |
1134 | if (tty->termios->c_cflag & HUPCL) | |
1135 | stl_setsignals(portp, 0, 0); | |
1136 | stl_enablerxtx(portp, 0, 0); | |
1137 | stl_flushbuffer(tty); | |
1138 | portp->istate = 0; | |
1139 | if (portp->tx.buf != (char *) NULL) { | |
1140 | kfree(portp->tx.buf); | |
1141 | portp->tx.buf = (char *) NULL; | |
1142 | portp->tx.head = (char *) NULL; | |
1143 | portp->tx.tail = (char *) NULL; | |
1144 | } | |
1145 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1146 | tty_ldisc_flush(tty); | |
1147 | ||
1148 | tty->closing = 0; | |
1149 | portp->tty = (struct tty_struct *) NULL; | |
1150 | ||
1151 | if (portp->openwaitcnt) { | |
1152 | if (portp->close_delay) | |
1153 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); | |
1154 | wake_up_interruptible(&portp->open_wait); | |
1155 | } | |
1156 | ||
1157 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1158 | wake_up_interruptible(&portp->close_wait); | |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | /*****************************************************************************/ | |
1162 | ||
1163 | /* | |
1164 | * Write routine. Take data and stuff it in to the TX ring queue. | |
1165 | * If transmit interrupts are not running then start them. | |
1166 | */ | |
1167 | ||
1168 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
1169 | { | |
1170 | stlport_t *portp; | |
1171 | unsigned int len, stlen; | |
1172 | unsigned char *chbuf; | |
1173 | char *head, *tail; | |
1174 | ||
1175 | #ifdef DEBUG | |
1176 | printk("stl_write(tty=%x,buf=%x,count=%d)\n", | |
1177 | (int) tty, (int) buf, count); | |
1178 | #endif | |
1179 | ||
1da177e4 LT |
1180 | portp = tty->driver_data; |
1181 | if (portp == (stlport_t *) NULL) | |
014c2544 | 1182 | return 0; |
1da177e4 | 1183 | if (portp->tx.buf == (char *) NULL) |
014c2544 | 1184 | return 0; |
1da177e4 LT |
1185 | |
1186 | /* | |
1187 | * If copying direct from user space we must cater for page faults, | |
1188 | * causing us to "sleep" here for a while. To handle this copy in all | |
1189 | * the data we need now, into a local buffer. Then when we got it all | |
1190 | * copy it into the TX buffer. | |
1191 | */ | |
1192 | chbuf = (unsigned char *) buf; | |
1193 | ||
1194 | head = portp->tx.head; | |
1195 | tail = portp->tx.tail; | |
1196 | if (head >= tail) { | |
1197 | len = STL_TXBUFSIZE - (head - tail) - 1; | |
1198 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); | |
1199 | } else { | |
1200 | len = tail - head - 1; | |
1201 | stlen = len; | |
1202 | } | |
1203 | ||
1204 | len = MIN(len, count); | |
1205 | count = 0; | |
1206 | while (len > 0) { | |
1207 | stlen = MIN(len, stlen); | |
1208 | memcpy(head, chbuf, stlen); | |
1209 | len -= stlen; | |
1210 | chbuf += stlen; | |
1211 | count += stlen; | |
1212 | head += stlen; | |
1213 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { | |
1214 | head = portp->tx.buf; | |
1215 | stlen = tail - head; | |
1216 | } | |
1217 | } | |
1218 | portp->tx.head = head; | |
1219 | ||
1220 | clear_bit(ASYI_TXLOW, &portp->istate); | |
1221 | stl_startrxtx(portp, -1, 1); | |
1222 | ||
014c2544 | 1223 | return count; |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | /*****************************************************************************/ | |
1227 | ||
1228 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) | |
1229 | { | |
1230 | stlport_t *portp; | |
1231 | unsigned int len; | |
1232 | char *head, *tail; | |
1233 | ||
1234 | #ifdef DEBUG | |
1235 | printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch); | |
1236 | #endif | |
1237 | ||
1238 | if (tty == (struct tty_struct *) NULL) | |
1239 | return; | |
1240 | portp = tty->driver_data; | |
1241 | if (portp == (stlport_t *) NULL) | |
1242 | return; | |
1243 | if (portp->tx.buf == (char *) NULL) | |
1244 | return; | |
1245 | ||
1246 | head = portp->tx.head; | |
1247 | tail = portp->tx.tail; | |
1248 | ||
1249 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); | |
1250 | len--; | |
1251 | ||
1252 | if (len > 0) { | |
1253 | *head++ = ch; | |
1254 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) | |
1255 | head = portp->tx.buf; | |
1256 | } | |
1257 | portp->tx.head = head; | |
1258 | } | |
1259 | ||
1260 | /*****************************************************************************/ | |
1261 | ||
1262 | /* | |
1263 | * If there are any characters in the buffer then make sure that TX | |
1264 | * interrupts are on and get'em out. Normally used after the putchar | |
1265 | * routine has been called. | |
1266 | */ | |
1267 | ||
1268 | static void stl_flushchars(struct tty_struct *tty) | |
1269 | { | |
1270 | stlport_t *portp; | |
1271 | ||
1272 | #ifdef DEBUG | |
1273 | printk("stl_flushchars(tty=%x)\n", (int) tty); | |
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 | ||
1da177e4 LT |
1284 | stl_startrxtx(portp, -1, 1); |
1285 | } | |
1286 | ||
1287 | /*****************************************************************************/ | |
1288 | ||
1289 | static int stl_writeroom(struct tty_struct *tty) | |
1290 | { | |
1291 | stlport_t *portp; | |
1292 | char *head, *tail; | |
1293 | ||
1294 | #ifdef DEBUG | |
1295 | printk("stl_writeroom(tty=%x)\n", (int) tty); | |
1296 | #endif | |
1297 | ||
1298 | if (tty == (struct tty_struct *) NULL) | |
014c2544 | 1299 | return 0; |
1da177e4 LT |
1300 | portp = tty->driver_data; |
1301 | if (portp == (stlport_t *) NULL) | |
014c2544 | 1302 | return 0; |
1da177e4 | 1303 | if (portp->tx.buf == (char *) NULL) |
014c2544 | 1304 | return 0; |
1da177e4 LT |
1305 | |
1306 | head = portp->tx.head; | |
1307 | tail = portp->tx.tail; | |
014c2544 | 1308 | return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); |
1da177e4 LT |
1309 | } |
1310 | ||
1311 | /*****************************************************************************/ | |
1312 | ||
1313 | /* | |
1314 | * Return number of chars in the TX buffer. Normally we would just | |
1315 | * calculate the number of chars in the buffer and return that, but if | |
1316 | * the buffer is empty and TX interrupts are still on then we return | |
1317 | * that the buffer still has 1 char in it. This way whoever called us | |
1318 | * will not think that ALL chars have drained - since the UART still | |
1319 | * must have some chars in it (we are busy after all). | |
1320 | */ | |
1321 | ||
1322 | static int stl_charsinbuffer(struct tty_struct *tty) | |
1323 | { | |
1324 | stlport_t *portp; | |
1325 | unsigned int size; | |
1326 | char *head, *tail; | |
1327 | ||
1328 | #ifdef DEBUG | |
1329 | printk("stl_charsinbuffer(tty=%x)\n", (int) tty); | |
1330 | #endif | |
1331 | ||
1332 | if (tty == (struct tty_struct *) NULL) | |
014c2544 | 1333 | return 0; |
1da177e4 LT |
1334 | portp = tty->driver_data; |
1335 | if (portp == (stlport_t *) NULL) | |
014c2544 | 1336 | return 0; |
1da177e4 | 1337 | if (portp->tx.buf == (char *) NULL) |
014c2544 | 1338 | return 0; |
1da177e4 LT |
1339 | |
1340 | head = portp->tx.head; | |
1341 | tail = portp->tx.tail; | |
1342 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
1343 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) | |
1344 | size = 1; | |
014c2544 | 1345 | return size; |
1da177e4 LT |
1346 | } |
1347 | ||
1348 | /*****************************************************************************/ | |
1349 | ||
1350 | /* | |
1351 | * Generate the serial struct info. | |
1352 | */ | |
1353 | ||
1354 | static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp) | |
1355 | { | |
1356 | struct serial_struct sio; | |
1357 | stlbrd_t *brdp; | |
1358 | ||
1359 | #ifdef DEBUG | |
1360 | printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); | |
1361 | #endif | |
1362 | ||
1363 | memset(&sio, 0, sizeof(struct serial_struct)); | |
1364 | sio.line = portp->portnr; | |
1365 | sio.port = portp->ioaddr; | |
1366 | sio.flags = portp->flags; | |
1367 | sio.baud_base = portp->baud_base; | |
1368 | sio.close_delay = portp->close_delay; | |
1369 | sio.closing_wait = portp->closing_wait; | |
1370 | sio.custom_divisor = portp->custom_divisor; | |
1371 | sio.hub6 = 0; | |
1372 | if (portp->uartp == &stl_cd1400uart) { | |
1373 | sio.type = PORT_CIRRUS; | |
1374 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; | |
1375 | } else { | |
1376 | sio.type = PORT_UNKNOWN; | |
1377 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; | |
1378 | } | |
1379 | ||
1380 | brdp = stl_brds[portp->brdnr]; | |
1381 | if (brdp != (stlbrd_t *) NULL) | |
1382 | sio.irq = brdp->irq; | |
1383 | ||
1384 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; | |
1385 | } | |
1386 | ||
1387 | /*****************************************************************************/ | |
1388 | ||
1389 | /* | |
1390 | * Set port according to the serial struct info. | |
1391 | * At this point we do not do any auto-configure stuff, so we will | |
1392 | * just quietly ignore any requests to change irq, etc. | |
1393 | */ | |
1394 | ||
1395 | static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp) | |
1396 | { | |
1397 | struct serial_struct sio; | |
1398 | ||
1399 | #ifdef DEBUG | |
1400 | printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); | |
1401 | #endif | |
1402 | ||
1403 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) | |
1404 | return -EFAULT; | |
1405 | if (!capable(CAP_SYS_ADMIN)) { | |
1406 | if ((sio.baud_base != portp->baud_base) || | |
1407 | (sio.close_delay != portp->close_delay) || | |
1408 | ((sio.flags & ~ASYNC_USR_MASK) != | |
1409 | (portp->flags & ~ASYNC_USR_MASK))) | |
014c2544 | 1410 | return -EPERM; |
1da177e4 LT |
1411 | } |
1412 | ||
1413 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | | |
1414 | (sio.flags & ASYNC_USR_MASK); | |
1415 | portp->baud_base = sio.baud_base; | |
1416 | portp->close_delay = sio.close_delay; | |
1417 | portp->closing_wait = sio.closing_wait; | |
1418 | portp->custom_divisor = sio.custom_divisor; | |
1419 | stl_setport(portp, portp->tty->termios); | |
014c2544 | 1420 | return 0; |
1da177e4 LT |
1421 | } |
1422 | ||
1423 | /*****************************************************************************/ | |
1424 | ||
1425 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) | |
1426 | { | |
1427 | stlport_t *portp; | |
1428 | ||
1429 | if (tty == (struct tty_struct *) NULL) | |
014c2544 | 1430 | return -ENODEV; |
1da177e4 LT |
1431 | portp = tty->driver_data; |
1432 | if (portp == (stlport_t *) NULL) | |
014c2544 | 1433 | return -ENODEV; |
1da177e4 | 1434 | if (tty->flags & (1 << TTY_IO_ERROR)) |
014c2544 | 1435 | return -EIO; |
1da177e4 LT |
1436 | |
1437 | return stl_getsignals(portp); | |
1438 | } | |
1439 | ||
1440 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, | |
1441 | unsigned int set, unsigned int clear) | |
1442 | { | |
1443 | stlport_t *portp; | |
1444 | int rts = -1, dtr = -1; | |
1445 | ||
1446 | if (tty == (struct tty_struct *) NULL) | |
014c2544 | 1447 | return -ENODEV; |
1da177e4 LT |
1448 | portp = tty->driver_data; |
1449 | if (portp == (stlport_t *) NULL) | |
014c2544 | 1450 | return -ENODEV; |
1da177e4 | 1451 | if (tty->flags & (1 << TTY_IO_ERROR)) |
014c2544 | 1452 | return -EIO; |
1da177e4 LT |
1453 | |
1454 | if (set & TIOCM_RTS) | |
1455 | rts = 1; | |
1456 | if (set & TIOCM_DTR) | |
1457 | dtr = 1; | |
1458 | if (clear & TIOCM_RTS) | |
1459 | rts = 0; | |
1460 | if (clear & TIOCM_DTR) | |
1461 | dtr = 0; | |
1462 | ||
1463 | stl_setsignals(portp, dtr, rts); | |
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) | |
1468 | { | |
1469 | stlport_t *portp; | |
1470 | unsigned int ival; | |
1471 | int rc; | |
1472 | void __user *argp = (void __user *)arg; | |
1473 | ||
1474 | #ifdef DEBUG | |
1475 | printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", | |
1476 | (int) tty, (int) file, cmd, (int) arg); | |
1477 | #endif | |
1478 | ||
1479 | if (tty == (struct tty_struct *) NULL) | |
014c2544 | 1480 | return -ENODEV; |
1da177e4 LT |
1481 | portp = tty->driver_data; |
1482 | if (portp == (stlport_t *) NULL) | |
014c2544 | 1483 | return -ENODEV; |
1da177e4 LT |
1484 | |
1485 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
1486 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { | |
1487 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
014c2544 | 1488 | return -EIO; |
1da177e4 LT |
1489 | } |
1490 | ||
1491 | rc = 0; | |
1492 | ||
1493 | switch (cmd) { | |
1494 | case TIOCGSOFTCAR: | |
1495 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), | |
1496 | (unsigned __user *) argp); | |
1497 | break; | |
1498 | case TIOCSSOFTCAR: | |
1499 | if (get_user(ival, (unsigned int __user *) arg)) | |
1500 | return -EFAULT; | |
1501 | tty->termios->c_cflag = | |
1502 | (tty->termios->c_cflag & ~CLOCAL) | | |
1503 | (ival ? CLOCAL : 0); | |
1504 | break; | |
1505 | case TIOCGSERIAL: | |
1506 | rc = stl_getserial(portp, argp); | |
1507 | break; | |
1508 | case TIOCSSERIAL: | |
1509 | rc = stl_setserial(portp, argp); | |
1510 | break; | |
1511 | case COM_GETPORTSTATS: | |
1512 | rc = stl_getportstats(portp, argp); | |
1513 | break; | |
1514 | case COM_CLRPORTSTATS: | |
1515 | rc = stl_clrportstats(portp, argp); | |
1516 | break; | |
1517 | case TIOCSERCONFIG: | |
1518 | case TIOCSERGWILD: | |
1519 | case TIOCSERSWILD: | |
1520 | case TIOCSERGETLSR: | |
1521 | case TIOCSERGSTRUCT: | |
1522 | case TIOCSERGETMULTI: | |
1523 | case TIOCSERSETMULTI: | |
1524 | default: | |
1525 | rc = -ENOIOCTLCMD; | |
1526 | break; | |
1527 | } | |
1528 | ||
014c2544 | 1529 | return rc; |
1da177e4 LT |
1530 | } |
1531 | ||
1532 | /*****************************************************************************/ | |
1533 | ||
1534 | static void stl_settermios(struct tty_struct *tty, struct termios *old) | |
1535 | { | |
1536 | stlport_t *portp; | |
1537 | struct termios *tiosp; | |
1538 | ||
1539 | #ifdef DEBUG | |
1540 | printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old); | |
1541 | #endif | |
1542 | ||
1543 | if (tty == (struct tty_struct *) NULL) | |
1544 | return; | |
1545 | portp = tty->driver_data; | |
1546 | if (portp == (stlport_t *) NULL) | |
1547 | return; | |
1548 | ||
1549 | tiosp = tty->termios; | |
1550 | if ((tiosp->c_cflag == old->c_cflag) && | |
1551 | (tiosp->c_iflag == old->c_iflag)) | |
1552 | return; | |
1553 | ||
1554 | stl_setport(portp, tiosp); | |
1555 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), | |
1556 | -1); | |
1557 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { | |
1558 | tty->hw_stopped = 0; | |
1559 | stl_start(tty); | |
1560 | } | |
1561 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) | |
1562 | wake_up_interruptible(&portp->open_wait); | |
1563 | } | |
1564 | ||
1565 | /*****************************************************************************/ | |
1566 | ||
1567 | /* | |
1568 | * Attempt to flow control who ever is sending us data. Based on termios | |
1569 | * settings use software or/and hardware flow control. | |
1570 | */ | |
1571 | ||
1572 | static void stl_throttle(struct tty_struct *tty) | |
1573 | { | |
1574 | stlport_t *portp; | |
1575 | ||
1576 | #ifdef DEBUG | |
1577 | printk("stl_throttle(tty=%x)\n", (int) tty); | |
1578 | #endif | |
1579 | ||
1580 | if (tty == (struct tty_struct *) NULL) | |
1581 | return; | |
1582 | portp = tty->driver_data; | |
1583 | if (portp == (stlport_t *) NULL) | |
1584 | return; | |
1585 | stl_flowctrl(portp, 0); | |
1586 | } | |
1587 | ||
1588 | /*****************************************************************************/ | |
1589 | ||
1590 | /* | |
1591 | * Unflow control the device sending us data... | |
1592 | */ | |
1593 | ||
1594 | static void stl_unthrottle(struct tty_struct *tty) | |
1595 | { | |
1596 | stlport_t *portp; | |
1597 | ||
1598 | #ifdef DEBUG | |
1599 | printk("stl_unthrottle(tty=%x)\n", (int) tty); | |
1600 | #endif | |
1601 | ||
1602 | if (tty == (struct tty_struct *) NULL) | |
1603 | return; | |
1604 | portp = tty->driver_data; | |
1605 | if (portp == (stlport_t *) NULL) | |
1606 | return; | |
1607 | stl_flowctrl(portp, 1); | |
1608 | } | |
1609 | ||
1610 | /*****************************************************************************/ | |
1611 | ||
1612 | /* | |
1613 | * Stop the transmitter. Basically to do this we will just turn TX | |
1614 | * interrupts off. | |
1615 | */ | |
1616 | ||
1617 | static void stl_stop(struct tty_struct *tty) | |
1618 | { | |
1619 | stlport_t *portp; | |
1620 | ||
1621 | #ifdef DEBUG | |
1622 | printk("stl_stop(tty=%x)\n", (int) tty); | |
1623 | #endif | |
1624 | ||
1625 | if (tty == (struct tty_struct *) NULL) | |
1626 | return; | |
1627 | portp = tty->driver_data; | |
1628 | if (portp == (stlport_t *) NULL) | |
1629 | return; | |
1630 | stl_startrxtx(portp, -1, 0); | |
1631 | } | |
1632 | ||
1633 | /*****************************************************************************/ | |
1634 | ||
1635 | /* | |
1636 | * Start the transmitter again. Just turn TX interrupts back on. | |
1637 | */ | |
1638 | ||
1639 | static void stl_start(struct tty_struct *tty) | |
1640 | { | |
1641 | stlport_t *portp; | |
1642 | ||
1643 | #ifdef DEBUG | |
1644 | printk("stl_start(tty=%x)\n", (int) tty); | |
1645 | #endif | |
1646 | ||
1647 | if (tty == (struct tty_struct *) NULL) | |
1648 | return; | |
1649 | portp = tty->driver_data; | |
1650 | if (portp == (stlport_t *) NULL) | |
1651 | return; | |
1652 | stl_startrxtx(portp, -1, 1); | |
1653 | } | |
1654 | ||
1655 | /*****************************************************************************/ | |
1656 | ||
1657 | /* | |
1658 | * Hangup this port. This is pretty much like closing the port, only | |
1659 | * a little more brutal. No waiting for data to drain. Shutdown the | |
1660 | * port and maybe drop signals. | |
1661 | */ | |
1662 | ||
1663 | static void stl_hangup(struct tty_struct *tty) | |
1664 | { | |
1665 | stlport_t *portp; | |
1666 | ||
1667 | #ifdef DEBUG | |
1668 | printk("stl_hangup(tty=%x)\n", (int) tty); | |
1669 | #endif | |
1670 | ||
1671 | if (tty == (struct tty_struct *) NULL) | |
1672 | return; | |
1673 | portp = tty->driver_data; | |
1674 | if (portp == (stlport_t *) NULL) | |
1675 | return; | |
1676 | ||
1677 | portp->flags &= ~ASYNC_INITIALIZED; | |
1678 | stl_disableintrs(portp); | |
1679 | if (tty->termios->c_cflag & HUPCL) | |
1680 | stl_setsignals(portp, 0, 0); | |
1681 | stl_enablerxtx(portp, 0, 0); | |
1682 | stl_flushbuffer(tty); | |
1683 | portp->istate = 0; | |
1684 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1685 | if (portp->tx.buf != (char *) NULL) { | |
1686 | kfree(portp->tx.buf); | |
1687 | portp->tx.buf = (char *) NULL; | |
1688 | portp->tx.head = (char *) NULL; | |
1689 | portp->tx.tail = (char *) NULL; | |
1690 | } | |
1691 | portp->tty = (struct tty_struct *) NULL; | |
1692 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1693 | portp->refcount = 0; | |
1694 | wake_up_interruptible(&portp->open_wait); | |
1695 | } | |
1696 | ||
1697 | /*****************************************************************************/ | |
1698 | ||
1699 | static void stl_flushbuffer(struct tty_struct *tty) | |
1700 | { | |
1701 | stlport_t *portp; | |
1702 | ||
1703 | #ifdef DEBUG | |
1704 | printk("stl_flushbuffer(tty=%x)\n", (int) tty); | |
1705 | #endif | |
1706 | ||
1707 | if (tty == (struct tty_struct *) NULL) | |
1708 | return; | |
1709 | portp = tty->driver_data; | |
1710 | if (portp == (stlport_t *) NULL) | |
1711 | return; | |
1712 | ||
1713 | stl_flush(portp); | |
1714 | tty_wakeup(tty); | |
1715 | } | |
1716 | ||
1717 | /*****************************************************************************/ | |
1718 | ||
1719 | static void stl_breakctl(struct tty_struct *tty, int state) | |
1720 | { | |
1721 | stlport_t *portp; | |
1722 | ||
1723 | #ifdef DEBUG | |
1724 | printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state); | |
1725 | #endif | |
1726 | ||
1727 | if (tty == (struct tty_struct *) NULL) | |
1728 | return; | |
1729 | portp = tty->driver_data; | |
1730 | if (portp == (stlport_t *) NULL) | |
1731 | return; | |
1732 | ||
1733 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); | |
1734 | } | |
1735 | ||
1736 | /*****************************************************************************/ | |
1737 | ||
1738 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) | |
1739 | { | |
1740 | stlport_t *portp; | |
1741 | unsigned long tend; | |
1742 | ||
1743 | #ifdef DEBUG | |
1744 | printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout); | |
1745 | #endif | |
1746 | ||
1747 | if (tty == (struct tty_struct *) NULL) | |
1748 | return; | |
1749 | portp = tty->driver_data; | |
1750 | if (portp == (stlport_t *) NULL) | |
1751 | return; | |
1752 | ||
1753 | if (timeout == 0) | |
1754 | timeout = HZ; | |
1755 | tend = jiffies + timeout; | |
1756 | ||
1757 | while (stl_datastate(portp)) { | |
1758 | if (signal_pending(current)) | |
1759 | break; | |
1760 | msleep_interruptible(20); | |
1761 | if (time_after_eq(jiffies, tend)) | |
1762 | break; | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | /*****************************************************************************/ | |
1767 | ||
1768 | static void stl_sendxchar(struct tty_struct *tty, char ch) | |
1769 | { | |
1770 | stlport_t *portp; | |
1771 | ||
1772 | #ifdef DEBUG | |
1773 | printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch); | |
1774 | #endif | |
1775 | ||
1776 | if (tty == (struct tty_struct *) NULL) | |
1777 | return; | |
1778 | portp = tty->driver_data; | |
1779 | if (portp == (stlport_t *) NULL) | |
1780 | return; | |
1781 | ||
1782 | if (ch == STOP_CHAR(tty)) | |
1783 | stl_sendflow(portp, 0); | |
1784 | else if (ch == START_CHAR(tty)) | |
1785 | stl_sendflow(portp, 1); | |
1786 | else | |
1787 | stl_putchar(tty, ch); | |
1788 | } | |
1789 | ||
1790 | /*****************************************************************************/ | |
1791 | ||
1792 | #define MAXLINE 80 | |
1793 | ||
1794 | /* | |
1795 | * Format info for a specified port. The line is deliberately limited | |
1796 | * to 80 characters. (If it is too long it will be truncated, if too | |
1797 | * short then padded with spaces). | |
1798 | */ | |
1799 | ||
1800 | static int stl_portinfo(stlport_t *portp, int portnr, char *pos) | |
1801 | { | |
1802 | char *sp; | |
1803 | int sigs, cnt; | |
1804 | ||
1805 | sp = pos; | |
1806 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", | |
1807 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", | |
1808 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); | |
1809 | ||
1810 | if (portp->stats.rxframing) | |
1811 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); | |
1812 | if (portp->stats.rxparity) | |
1813 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); | |
1814 | if (portp->stats.rxbreaks) | |
1815 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); | |
1816 | if (portp->stats.rxoverrun) | |
1817 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); | |
1818 | ||
1819 | sigs = stl_getsignals(portp); | |
1820 | cnt = sprintf(sp, "%s%s%s%s%s ", | |
1821 | (sigs & TIOCM_RTS) ? "|RTS" : "", | |
1822 | (sigs & TIOCM_CTS) ? "|CTS" : "", | |
1823 | (sigs & TIOCM_DTR) ? "|DTR" : "", | |
1824 | (sigs & TIOCM_CD) ? "|DCD" : "", | |
1825 | (sigs & TIOCM_DSR) ? "|DSR" : ""); | |
1826 | *sp = ' '; | |
1827 | sp += cnt; | |
1828 | ||
1829 | for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) | |
1830 | *sp++ = ' '; | |
1831 | if (cnt >= MAXLINE) | |
1832 | pos[(MAXLINE - 2)] = '+'; | |
1833 | pos[(MAXLINE - 1)] = '\n'; | |
1834 | ||
014c2544 | 1835 | return MAXLINE; |
1da177e4 LT |
1836 | } |
1837 | ||
1838 | /*****************************************************************************/ | |
1839 | ||
1840 | /* | |
1841 | * Port info, read from the /proc file system. | |
1842 | */ | |
1843 | ||
1844 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) | |
1845 | { | |
1846 | stlbrd_t *brdp; | |
1847 | stlpanel_t *panelp; | |
1848 | stlport_t *portp; | |
1849 | int brdnr, panelnr, portnr, totalport; | |
1850 | int curoff, maxoff; | |
1851 | char *pos; | |
1852 | ||
1853 | #ifdef DEBUG | |
1854 | printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x," | |
1855 | "data=%x\n", (int) page, (int) start, (int) off, count, | |
1856 | (int) eof, (int) data); | |
1857 | #endif | |
1858 | ||
1859 | pos = page; | |
1860 | totalport = 0; | |
1861 | curoff = 0; | |
1862 | ||
1863 | if (off == 0) { | |
1864 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, | |
1865 | stl_drvversion); | |
1866 | while (pos < (page + MAXLINE - 1)) | |
1867 | *pos++ = ' '; | |
1868 | *pos++ = '\n'; | |
1869 | } | |
1870 | curoff = MAXLINE; | |
1871 | ||
1872 | /* | |
1873 | * We scan through for each board, panel and port. The offset is | |
1874 | * calculated on the fly, and irrelevant ports are skipped. | |
1875 | */ | |
1876 | for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { | |
1877 | brdp = stl_brds[brdnr]; | |
1878 | if (brdp == (stlbrd_t *) NULL) | |
1879 | continue; | |
1880 | if (brdp->state == 0) | |
1881 | continue; | |
1882 | ||
1883 | maxoff = curoff + (brdp->nrports * MAXLINE); | |
1884 | if (off >= maxoff) { | |
1885 | curoff = maxoff; | |
1886 | continue; | |
1887 | } | |
1888 | ||
1889 | totalport = brdnr * STL_MAXPORTS; | |
1890 | for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { | |
1891 | panelp = brdp->panels[panelnr]; | |
1892 | if (panelp == (stlpanel_t *) NULL) | |
1893 | continue; | |
1894 | ||
1895 | maxoff = curoff + (panelp->nrports * MAXLINE); | |
1896 | if (off >= maxoff) { | |
1897 | curoff = maxoff; | |
1898 | totalport += panelp->nrports; | |
1899 | continue; | |
1900 | } | |
1901 | ||
1902 | for (portnr = 0; (portnr < panelp->nrports); portnr++, | |
1903 | totalport++) { | |
1904 | portp = panelp->ports[portnr]; | |
1905 | if (portp == (stlport_t *) NULL) | |
1906 | continue; | |
1907 | if (off >= (curoff += MAXLINE)) | |
1908 | continue; | |
1909 | if ((pos - page + MAXLINE) > count) | |
1910 | goto stl_readdone; | |
1911 | pos += stl_portinfo(portp, totalport, pos); | |
1912 | } | |
1913 | } | |
1914 | } | |
1915 | ||
1916 | *eof = 1; | |
1917 | ||
1918 | stl_readdone: | |
1919 | *start = page; | |
014c2544 | 1920 | return (pos - page); |
1da177e4 LT |
1921 | } |
1922 | ||
1923 | /*****************************************************************************/ | |
1924 | ||
1925 | /* | |
1926 | * All board interrupts are vectored through here first. This code then | |
1927 | * calls off to the approrpriate board interrupt handlers. | |
1928 | */ | |
1929 | ||
7d12e780 | 1930 | static irqreturn_t stl_intr(int irq, void *dev_id) |
1da177e4 LT |
1931 | { |
1932 | stlbrd_t *brdp = (stlbrd_t *) dev_id; | |
1933 | ||
1934 | #ifdef DEBUG | |
7d12e780 | 1935 | printk("stl_intr(brdp=%x,irq=%d)\n", (int) brdp, irq); |
1da177e4 LT |
1936 | #endif |
1937 | ||
1938 | return IRQ_RETVAL((* brdp->isr)(brdp)); | |
1939 | } | |
1940 | ||
1941 | /*****************************************************************************/ | |
1942 | ||
1943 | /* | |
1944 | * Interrupt service routine for EasyIO board types. | |
1945 | */ | |
1946 | ||
1947 | static int stl_eiointr(stlbrd_t *brdp) | |
1948 | { | |
1949 | stlpanel_t *panelp; | |
1950 | unsigned int iobase; | |
1951 | int handled = 0; | |
1952 | ||
b65b5b59 | 1953 | spin_lock(&brd_lock); |
1da177e4 LT |
1954 | panelp = brdp->panels[0]; |
1955 | iobase = panelp->iobase; | |
1956 | while (inb(brdp->iostatus) & EIO_INTRPEND) { | |
1957 | handled = 1; | |
1958 | (* panelp->isr)(panelp, iobase); | |
1959 | } | |
b65b5b59 | 1960 | spin_unlock(&brd_lock); |
1da177e4 LT |
1961 | return handled; |
1962 | } | |
1963 | ||
1964 | /*****************************************************************************/ | |
1965 | ||
1966 | /* | |
1967 | * Interrupt service routine for ECH-AT board types. | |
1968 | */ | |
1969 | ||
1970 | static int stl_echatintr(stlbrd_t *brdp) | |
1971 | { | |
1972 | stlpanel_t *panelp; | |
1973 | unsigned int ioaddr; | |
1974 | int bnknr; | |
1975 | int handled = 0; | |
1976 | ||
1977 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); | |
1978 | ||
1979 | while (inb(brdp->iostatus) & ECH_INTRPEND) { | |
1980 | handled = 1; | |
1981 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
1982 | ioaddr = brdp->bnkstataddr[bnknr]; | |
1983 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1984 | panelp = brdp->bnk2panel[bnknr]; | |
1985 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1986 | } | |
1987 | } | |
1988 | } | |
1989 | ||
1990 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); | |
1991 | ||
1992 | return handled; | |
1993 | } | |
1994 | ||
1995 | /*****************************************************************************/ | |
1996 | ||
1997 | /* | |
1998 | * Interrupt service routine for ECH-MCA board types. | |
1999 | */ | |
2000 | ||
2001 | static int stl_echmcaintr(stlbrd_t *brdp) | |
2002 | { | |
2003 | stlpanel_t *panelp; | |
2004 | unsigned int ioaddr; | |
2005 | int bnknr; | |
2006 | int handled = 0; | |
2007 | ||
2008 | while (inb(brdp->iostatus) & ECH_INTRPEND) { | |
2009 | handled = 1; | |
2010 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
2011 | ioaddr = brdp->bnkstataddr[bnknr]; | |
2012 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
2013 | panelp = brdp->bnk2panel[bnknr]; | |
2014 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
2015 | } | |
2016 | } | |
2017 | } | |
2018 | return handled; | |
2019 | } | |
2020 | ||
2021 | /*****************************************************************************/ | |
2022 | ||
2023 | /* | |
2024 | * Interrupt service routine for ECH-PCI board types. | |
2025 | */ | |
2026 | ||
2027 | static int stl_echpciintr(stlbrd_t *brdp) | |
2028 | { | |
2029 | stlpanel_t *panelp; | |
2030 | unsigned int ioaddr; | |
2031 | int bnknr, recheck; | |
2032 | int handled = 0; | |
2033 | ||
2034 | while (1) { | |
2035 | recheck = 0; | |
2036 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
2037 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); | |
2038 | ioaddr = brdp->bnkstataddr[bnknr]; | |
2039 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
2040 | panelp = brdp->bnk2panel[bnknr]; | |
2041 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
2042 | recheck++; | |
2043 | handled = 1; | |
2044 | } | |
2045 | } | |
2046 | if (! recheck) | |
2047 | break; | |
2048 | } | |
2049 | return handled; | |
2050 | } | |
2051 | ||
2052 | /*****************************************************************************/ | |
2053 | ||
2054 | /* | |
2055 | * Interrupt service routine for ECH-8/64-PCI board types. | |
2056 | */ | |
2057 | ||
2058 | static int stl_echpci64intr(stlbrd_t *brdp) | |
2059 | { | |
2060 | stlpanel_t *panelp; | |
2061 | unsigned int ioaddr; | |
2062 | int bnknr; | |
2063 | int handled = 0; | |
2064 | ||
2065 | while (inb(brdp->ioctrl) & 0x1) { | |
2066 | handled = 1; | |
2067 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
2068 | ioaddr = brdp->bnkstataddr[bnknr]; | |
2069 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
2070 | panelp = brdp->bnk2panel[bnknr]; | |
2071 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
2072 | } | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | return handled; | |
2077 | } | |
2078 | ||
2079 | /*****************************************************************************/ | |
2080 | ||
2081 | /* | |
2082 | * Service an off-level request for some channel. | |
2083 | */ | |
3e577a80 | 2084 | static void stl_offintr(struct work_struct *work) |
1da177e4 | 2085 | { |
3e577a80 | 2086 | stlport_t *portp = container_of(work, stlport_t, tqueue); |
1da177e4 LT |
2087 | struct tty_struct *tty; |
2088 | unsigned int oldsigs; | |
2089 | ||
1da177e4 LT |
2090 | #ifdef DEBUG |
2091 | printk("stl_offintr(portp=%x)\n", (int) portp); | |
2092 | #endif | |
2093 | ||
2094 | if (portp == (stlport_t *) NULL) | |
2095 | return; | |
2096 | ||
2097 | tty = portp->tty; | |
2098 | if (tty == (struct tty_struct *) NULL) | |
2099 | return; | |
2100 | ||
2101 | lock_kernel(); | |
2102 | if (test_bit(ASYI_TXLOW, &portp->istate)) { | |
2103 | tty_wakeup(tty); | |
2104 | } | |
2105 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { | |
2106 | clear_bit(ASYI_DCDCHANGE, &portp->istate); | |
2107 | oldsigs = portp->sigs; | |
2108 | portp->sigs = stl_getsignals(portp); | |
2109 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) | |
2110 | wake_up_interruptible(&portp->open_wait); | |
2111 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { | |
2112 | if (portp->flags & ASYNC_CHECK_CD) | |
2113 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ | |
2114 | } | |
2115 | } | |
2116 | unlock_kernel(); | |
2117 | } | |
2118 | ||
2119 | /*****************************************************************************/ | |
2120 | ||
2121 | /* | |
2122 | * Initialize all the ports on a panel. | |
2123 | */ | |
2124 | ||
2125 | static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp) | |
2126 | { | |
2127 | stlport_t *portp; | |
2128 | int chipmask, i; | |
2129 | ||
2130 | #ifdef DEBUG | |
2131 | printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); | |
2132 | #endif | |
2133 | ||
2134 | chipmask = stl_panelinit(brdp, panelp); | |
2135 | ||
2136 | /* | |
2137 | * All UART's are initialized (if found!). Now go through and setup | |
2138 | * each ports data structures. | |
2139 | */ | |
2140 | for (i = 0; (i < panelp->nrports); i++) { | |
b0b4ed72 TK |
2141 | portp = kzalloc(sizeof(stlport_t), GFP_KERNEL); |
2142 | if (!portp) { | |
1da177e4 | 2143 | printk("STALLION: failed to allocate memory " |
b65b5b59 | 2144 | "(size=%Zd)\n", sizeof(stlport_t)); |
1da177e4 LT |
2145 | break; |
2146 | } | |
1da177e4 LT |
2147 | |
2148 | portp->magic = STL_PORTMAGIC; | |
2149 | portp->portnr = i; | |
2150 | portp->brdnr = panelp->brdnr; | |
2151 | portp->panelnr = panelp->panelnr; | |
2152 | portp->uartp = panelp->uartp; | |
2153 | portp->clk = brdp->clk; | |
2154 | portp->baud_base = STL_BAUDBASE; | |
2155 | portp->close_delay = STL_CLOSEDELAY; | |
2156 | portp->closing_wait = 30 * HZ; | |
3e577a80 | 2157 | INIT_WORK(&portp->tqueue, stl_offintr); |
1da177e4 LT |
2158 | init_waitqueue_head(&portp->open_wait); |
2159 | init_waitqueue_head(&portp->close_wait); | |
2160 | portp->stats.brd = portp->brdnr; | |
2161 | portp->stats.panel = portp->panelnr; | |
2162 | portp->stats.port = portp->portnr; | |
2163 | panelp->ports[i] = portp; | |
2164 | stl_portinit(brdp, panelp, portp); | |
2165 | } | |
2166 | ||
2167 | return(0); | |
2168 | } | |
2169 | ||
2170 | /*****************************************************************************/ | |
2171 | ||
2172 | /* | |
2173 | * Try to find and initialize an EasyIO board. | |
2174 | */ | |
2175 | ||
2176 | static inline int stl_initeio(stlbrd_t *brdp) | |
2177 | { | |
2178 | stlpanel_t *panelp; | |
2179 | unsigned int status; | |
2180 | char *name; | |
2181 | int rc; | |
2182 | ||
2183 | #ifdef DEBUG | |
2184 | printk("stl_initeio(brdp=%x)\n", (int) brdp); | |
2185 | #endif | |
2186 | ||
2187 | brdp->ioctrl = brdp->ioaddr1 + 1; | |
2188 | brdp->iostatus = brdp->ioaddr1 + 2; | |
2189 | ||
2190 | status = inb(brdp->iostatus); | |
2191 | if ((status & EIO_IDBITMASK) == EIO_MK3) | |
2192 | brdp->ioctrl++; | |
2193 | ||
2194 | /* | |
2195 | * Handle board specific stuff now. The real difference is PCI | |
2196 | * or not PCI. | |
2197 | */ | |
2198 | if (brdp->brdtype == BRD_EASYIOPCI) { | |
2199 | brdp->iosize1 = 0x80; | |
2200 | brdp->iosize2 = 0x80; | |
2201 | name = "serial(EIO-PCI)"; | |
2202 | outb(0x41, (brdp->ioaddr2 + 0x4c)); | |
2203 | } else { | |
2204 | brdp->iosize1 = 8; | |
2205 | name = "serial(EIO)"; | |
2206 | if ((brdp->irq < 0) || (brdp->irq > 15) || | |
2207 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2208 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2209 | brdp->irq, brdp->brdnr); | |
2210 | return(-EINVAL); | |
2211 | } | |
2212 | outb((stl_vecmap[brdp->irq] | EIO_0WS | | |
2213 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), | |
2214 | brdp->ioctrl); | |
2215 | } | |
2216 | ||
2217 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { | |
2218 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " | |
2219 | "%x conflicts with another device\n", brdp->brdnr, | |
2220 | brdp->ioaddr1); | |
2221 | return(-EBUSY); | |
2222 | } | |
2223 | ||
2224 | if (brdp->iosize2 > 0) | |
2225 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { | |
2226 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " | |
2227 | "address %x conflicts with another device\n", | |
2228 | brdp->brdnr, brdp->ioaddr2); | |
2229 | printk(KERN_WARNING "STALLION: Warning, also " | |
2230 | "releasing board %d I/O address %x \n", | |
2231 | brdp->brdnr, brdp->ioaddr1); | |
2232 | release_region(brdp->ioaddr1, brdp->iosize1); | |
2233 | return(-EBUSY); | |
2234 | } | |
2235 | ||
2236 | /* | |
2237 | * Everything looks OK, so let's go ahead and probe for the hardware. | |
2238 | */ | |
2239 | brdp->clk = CD1400_CLK; | |
2240 | brdp->isr = stl_eiointr; | |
2241 | ||
2242 | switch (status & EIO_IDBITMASK) { | |
2243 | case EIO_8PORTM: | |
2244 | brdp->clk = CD1400_CLK8M; | |
2245 | /* fall thru */ | |
2246 | case EIO_8PORTRS: | |
2247 | case EIO_8PORTDI: | |
2248 | brdp->nrports = 8; | |
2249 | break; | |
2250 | case EIO_4PORTRS: | |
2251 | brdp->nrports = 4; | |
2252 | break; | |
2253 | case EIO_MK3: | |
2254 | switch (status & EIO_BRDMASK) { | |
2255 | case ID_BRD4: | |
2256 | brdp->nrports = 4; | |
2257 | break; | |
2258 | case ID_BRD8: | |
2259 | brdp->nrports = 8; | |
2260 | break; | |
2261 | case ID_BRD16: | |
2262 | brdp->nrports = 16; | |
2263 | break; | |
2264 | default: | |
2265 | return(-ENODEV); | |
2266 | } | |
2267 | break; | |
2268 | default: | |
2269 | return(-ENODEV); | |
2270 | } | |
2271 | ||
2272 | /* | |
2273 | * We have verified that the board is actually present, so now we | |
2274 | * can complete the setup. | |
2275 | */ | |
2276 | ||
b0b4ed72 TK |
2277 | panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL); |
2278 | if (!panelp) { | |
1da177e4 | 2279 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
b65b5b59 | 2280 | "(size=%Zd)\n", sizeof(stlpanel_t)); |
b0b4ed72 | 2281 | return -ENOMEM; |
1da177e4 | 2282 | } |
1da177e4 LT |
2283 | |
2284 | panelp->magic = STL_PANELMAGIC; | |
2285 | panelp->brdnr = brdp->brdnr; | |
2286 | panelp->panelnr = 0; | |
2287 | panelp->nrports = brdp->nrports; | |
2288 | panelp->iobase = brdp->ioaddr1; | |
2289 | panelp->hwid = status; | |
2290 | if ((status & EIO_IDBITMASK) == EIO_MK3) { | |
2291 | panelp->uartp = (void *) &stl_sc26198uart; | |
2292 | panelp->isr = stl_sc26198intr; | |
2293 | } else { | |
2294 | panelp->uartp = (void *) &stl_cd1400uart; | |
2295 | panelp->isr = stl_cd1400eiointr; | |
2296 | } | |
2297 | ||
2298 | brdp->panels[0] = panelp; | |
2299 | brdp->nrpanels = 1; | |
2300 | brdp->state |= BRD_FOUND; | |
2301 | brdp->hwid = status; | |
0f2ed4c6 | 2302 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
1da177e4 LT |
2303 | printk("STALLION: failed to register interrupt " |
2304 | "routine for %s irq=%d\n", name, brdp->irq); | |
2305 | rc = -ENODEV; | |
2306 | } else { | |
2307 | rc = 0; | |
2308 | } | |
014c2544 | 2309 | return rc; |
1da177e4 LT |
2310 | } |
2311 | ||
2312 | /*****************************************************************************/ | |
2313 | ||
2314 | /* | |
2315 | * Try to find an ECH board and initialize it. This code is capable of | |
2316 | * dealing with all types of ECH board. | |
2317 | */ | |
2318 | ||
2319 | static inline int stl_initech(stlbrd_t *brdp) | |
2320 | { | |
2321 | stlpanel_t *panelp; | |
2322 | unsigned int status, nxtid, ioaddr, conflict; | |
2323 | int panelnr, banknr, i; | |
2324 | char *name; | |
2325 | ||
2326 | #ifdef DEBUG | |
2327 | printk("stl_initech(brdp=%x)\n", (int) brdp); | |
2328 | #endif | |
2329 | ||
2330 | status = 0; | |
2331 | conflict = 0; | |
2332 | ||
2333 | /* | |
2334 | * Set up the initial board register contents for boards. This varies a | |
2335 | * bit between the different board types. So we need to handle each | |
2336 | * separately. Also do a check that the supplied IRQ is good. | |
2337 | */ | |
2338 | switch (brdp->brdtype) { | |
2339 | ||
2340 | case BRD_ECH: | |
2341 | brdp->isr = stl_echatintr; | |
2342 | brdp->ioctrl = brdp->ioaddr1 + 1; | |
2343 | brdp->iostatus = brdp->ioaddr1 + 1; | |
2344 | status = inb(brdp->iostatus); | |
2345 | if ((status & ECH_IDBITMASK) != ECH_ID) | |
2346 | return(-ENODEV); | |
2347 | if ((brdp->irq < 0) || (brdp->irq > 15) || | |
2348 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2349 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2350 | brdp->irq, brdp->brdnr); | |
2351 | return(-EINVAL); | |
2352 | } | |
2353 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); | |
2354 | status |= (stl_vecmap[brdp->irq] << 1); | |
2355 | outb((status | ECH_BRDRESET), brdp->ioaddr1); | |
2356 | brdp->ioctrlval = ECH_INTENABLE | | |
2357 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); | |
2358 | for (i = 0; (i < 10); i++) | |
2359 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); | |
2360 | brdp->iosize1 = 2; | |
2361 | brdp->iosize2 = 32; | |
2362 | name = "serial(EC8/32)"; | |
2363 | outb(status, brdp->ioaddr1); | |
2364 | break; | |
2365 | ||
2366 | case BRD_ECHMC: | |
2367 | brdp->isr = stl_echmcaintr; | |
2368 | brdp->ioctrl = brdp->ioaddr1 + 0x20; | |
2369 | brdp->iostatus = brdp->ioctrl; | |
2370 | status = inb(brdp->iostatus); | |
2371 | if ((status & ECH_IDBITMASK) != ECH_ID) | |
2372 | return(-ENODEV); | |
2373 | if ((brdp->irq < 0) || (brdp->irq > 15) || | |
2374 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2375 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2376 | brdp->irq, brdp->brdnr); | |
2377 | return(-EINVAL); | |
2378 | } | |
2379 | outb(ECHMC_BRDRESET, brdp->ioctrl); | |
2380 | outb(ECHMC_INTENABLE, brdp->ioctrl); | |
2381 | brdp->iosize1 = 64; | |
2382 | name = "serial(EC8/32-MC)"; | |
2383 | break; | |
2384 | ||
2385 | case BRD_ECHPCI: | |
2386 | brdp->isr = stl_echpciintr; | |
2387 | brdp->ioctrl = brdp->ioaddr1 + 2; | |
2388 | brdp->iosize1 = 4; | |
2389 | brdp->iosize2 = 8; | |
2390 | name = "serial(EC8/32-PCI)"; | |
2391 | break; | |
2392 | ||
2393 | case BRD_ECH64PCI: | |
2394 | brdp->isr = stl_echpci64intr; | |
2395 | brdp->ioctrl = brdp->ioaddr2 + 0x40; | |
2396 | outb(0x43, (brdp->ioaddr1 + 0x4c)); | |
2397 | brdp->iosize1 = 0x80; | |
2398 | brdp->iosize2 = 0x80; | |
2399 | name = "serial(EC8/64-PCI)"; | |
2400 | break; | |
2401 | ||
2402 | default: | |
2403 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); | |
2404 | return(-EINVAL); | |
2405 | break; | |
2406 | } | |
2407 | ||
2408 | /* | |
2409 | * Check boards for possible IO address conflicts and return fail status | |
2410 | * if an IO conflict found. | |
2411 | */ | |
2412 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { | |
2413 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " | |
2414 | "%x conflicts with another device\n", brdp->brdnr, | |
2415 | brdp->ioaddr1); | |
2416 | return(-EBUSY); | |
2417 | } | |
2418 | ||
2419 | if (brdp->iosize2 > 0) | |
2420 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { | |
2421 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " | |
2422 | "address %x conflicts with another device\n", | |
2423 | brdp->brdnr, brdp->ioaddr2); | |
2424 | printk(KERN_WARNING "STALLION: Warning, also " | |
2425 | "releasing board %d I/O address %x \n", | |
2426 | brdp->brdnr, brdp->ioaddr1); | |
2427 | release_region(brdp->ioaddr1, brdp->iosize1); | |
2428 | return(-EBUSY); | |
2429 | } | |
2430 | ||
2431 | /* | |
2432 | * Scan through the secondary io address space looking for panels. | |
2433 | * As we find'em allocate and initialize panel structures for each. | |
2434 | */ | |
2435 | brdp->clk = CD1400_CLK; | |
2436 | brdp->hwid = status; | |
2437 | ||
2438 | ioaddr = brdp->ioaddr2; | |
2439 | banknr = 0; | |
2440 | panelnr = 0; | |
2441 | nxtid = 0; | |
2442 | ||
2443 | for (i = 0; (i < STL_MAXPANELS); i++) { | |
2444 | if (brdp->brdtype == BRD_ECHPCI) { | |
2445 | outb(nxtid, brdp->ioctrl); | |
2446 | ioaddr = brdp->ioaddr2; | |
2447 | } | |
2448 | status = inb(ioaddr + ECH_PNLSTATUS); | |
2449 | if ((status & ECH_PNLIDMASK) != nxtid) | |
2450 | break; | |
b0b4ed72 TK |
2451 | panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL); |
2452 | if (!panelp) { | |
1da177e4 | 2453 | printk("STALLION: failed to allocate memory " |
b65b5b59 | 2454 | "(size=%Zd)\n", sizeof(stlpanel_t)); |
1da177e4 LT |
2455 | break; |
2456 | } | |
1da177e4 LT |
2457 | panelp->magic = STL_PANELMAGIC; |
2458 | panelp->brdnr = brdp->brdnr; | |
2459 | panelp->panelnr = panelnr; | |
2460 | panelp->iobase = ioaddr; | |
2461 | panelp->pagenr = nxtid; | |
2462 | panelp->hwid = status; | |
2463 | brdp->bnk2panel[banknr] = panelp; | |
2464 | brdp->bnkpageaddr[banknr] = nxtid; | |
2465 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; | |
2466 | ||
2467 | if (status & ECH_PNLXPID) { | |
2468 | panelp->uartp = (void *) &stl_sc26198uart; | |
2469 | panelp->isr = stl_sc26198intr; | |
2470 | if (status & ECH_PNL16PORT) { | |
2471 | panelp->nrports = 16; | |
2472 | brdp->bnk2panel[banknr] = panelp; | |
2473 | brdp->bnkpageaddr[banknr] = nxtid; | |
2474 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + | |
2475 | ECH_PNLSTATUS; | |
2476 | } else { | |
2477 | panelp->nrports = 8; | |
2478 | } | |
2479 | } else { | |
2480 | panelp->uartp = (void *) &stl_cd1400uart; | |
2481 | panelp->isr = stl_cd1400echintr; | |
2482 | if (status & ECH_PNL16PORT) { | |
2483 | panelp->nrports = 16; | |
2484 | panelp->ackmask = 0x80; | |
2485 | if (brdp->brdtype != BRD_ECHPCI) | |
2486 | ioaddr += EREG_BANKSIZE; | |
2487 | brdp->bnk2panel[banknr] = panelp; | |
2488 | brdp->bnkpageaddr[banknr] = ++nxtid; | |
2489 | brdp->bnkstataddr[banknr++] = ioaddr + | |
2490 | ECH_PNLSTATUS; | |
2491 | } else { | |
2492 | panelp->nrports = 8; | |
2493 | panelp->ackmask = 0xc0; | |
2494 | } | |
2495 | } | |
2496 | ||
2497 | nxtid++; | |
2498 | ioaddr += EREG_BANKSIZE; | |
2499 | brdp->nrports += panelp->nrports; | |
2500 | brdp->panels[panelnr++] = panelp; | |
2501 | if ((brdp->brdtype != BRD_ECHPCI) && | |
2502 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) | |
2503 | break; | |
2504 | } | |
2505 | ||
2506 | brdp->nrpanels = panelnr; | |
2507 | brdp->nrbnks = banknr; | |
2508 | if (brdp->brdtype == BRD_ECH) | |
2509 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); | |
2510 | ||
2511 | brdp->state |= BRD_FOUND; | |
0f2ed4c6 | 2512 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
1da177e4 LT |
2513 | printk("STALLION: failed to register interrupt " |
2514 | "routine for %s irq=%d\n", name, brdp->irq); | |
2515 | i = -ENODEV; | |
2516 | } else { | |
2517 | i = 0; | |
2518 | } | |
2519 | ||
2520 | return(i); | |
2521 | } | |
2522 | ||
2523 | /*****************************************************************************/ | |
2524 | ||
2525 | /* | |
2526 | * Initialize and configure the specified board. | |
2527 | * Scan through all the boards in the configuration and see what we | |
2528 | * can find. Handle EIO and the ECH boards a little differently here | |
2529 | * since the initial search and setup is very different. | |
2530 | */ | |
2531 | ||
2532 | static int __init stl_brdinit(stlbrd_t *brdp) | |
2533 | { | |
2534 | int i; | |
2535 | ||
2536 | #ifdef DEBUG | |
2537 | printk("stl_brdinit(brdp=%x)\n", (int) brdp); | |
2538 | #endif | |
2539 | ||
2540 | switch (brdp->brdtype) { | |
2541 | case BRD_EASYIO: | |
2542 | case BRD_EASYIOPCI: | |
2543 | stl_initeio(brdp); | |
2544 | break; | |
2545 | case BRD_ECH: | |
2546 | case BRD_ECHMC: | |
2547 | case BRD_ECHPCI: | |
2548 | case BRD_ECH64PCI: | |
2549 | stl_initech(brdp); | |
2550 | break; | |
2551 | default: | |
2552 | printk("STALLION: board=%d is unknown board type=%d\n", | |
2553 | brdp->brdnr, brdp->brdtype); | |
2554 | return(ENODEV); | |
2555 | } | |
2556 | ||
2557 | stl_brds[brdp->brdnr] = brdp; | |
2558 | if ((brdp->state & BRD_FOUND) == 0) { | |
2559 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", | |
2560 | stl_brdnames[brdp->brdtype], brdp->brdnr, | |
2561 | brdp->ioaddr1, brdp->irq); | |
2562 | return(ENODEV); | |
2563 | } | |
2564 | ||
2565 | for (i = 0; (i < STL_MAXPANELS); i++) | |
2566 | if (brdp->panels[i] != (stlpanel_t *) NULL) | |
2567 | stl_initports(brdp, brdp->panels[i]); | |
2568 | ||
2569 | printk("STALLION: %s found, board=%d io=%x irq=%d " | |
2570 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], | |
2571 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, | |
2572 | brdp->nrports); | |
2573 | return(0); | |
2574 | } | |
2575 | ||
2576 | /*****************************************************************************/ | |
2577 | ||
2578 | /* | |
2579 | * Find the next available board number that is free. | |
2580 | */ | |
2581 | ||
2582 | static inline int stl_getbrdnr(void) | |
2583 | { | |
2584 | int i; | |
2585 | ||
2586 | for (i = 0; (i < STL_MAXBRDS); i++) { | |
2587 | if (stl_brds[i] == (stlbrd_t *) NULL) { | |
2588 | if (i >= stl_nrbrds) | |
2589 | stl_nrbrds = i + 1; | |
2590 | return(i); | |
2591 | } | |
2592 | } | |
2593 | return(-1); | |
2594 | } | |
2595 | ||
2596 | /*****************************************************************************/ | |
2597 | ||
2598 | #ifdef CONFIG_PCI | |
2599 | ||
2600 | /* | |
2601 | * We have a Stallion board. Allocate a board structure and | |
2602 | * initialize it. Read its IO and IRQ resources from PCI | |
2603 | * configuration space. | |
2604 | */ | |
2605 | ||
2606 | static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp) | |
2607 | { | |
2608 | stlbrd_t *brdp; | |
2609 | ||
2610 | #ifdef DEBUG | |
2611 | printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, | |
2612 | devp->bus->number, devp->devfn); | |
2613 | #endif | |
2614 | ||
2615 | if (pci_enable_device(devp)) | |
2616 | return(-EIO); | |
2617 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) | |
2618 | return(-ENOMEM); | |
2619 | if ((brdp->brdnr = stl_getbrdnr()) < 0) { | |
2620 | printk("STALLION: too many boards found, " | |
2621 | "maximum supported %d\n", STL_MAXBRDS); | |
2622 | return(0); | |
2623 | } | |
2624 | brdp->brdtype = brdtype; | |
2625 | ||
2626 | /* | |
2627 | * Different Stallion boards use the BAR registers in different ways, | |
2628 | * so set up io addresses based on board type. | |
2629 | */ | |
2630 | #ifdef DEBUG | |
2631 | printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__, | |
2632 | pci_resource_start(devp, 0), pci_resource_start(devp, 1), | |
2633 | pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq); | |
2634 | #endif | |
2635 | ||
2636 | /* | |
2637 | * We have all resources from the board, so let's setup the actual | |
2638 | * board structure now. | |
2639 | */ | |
2640 | switch (brdtype) { | |
2641 | case BRD_ECHPCI: | |
2642 | brdp->ioaddr2 = pci_resource_start(devp, 0); | |
2643 | brdp->ioaddr1 = pci_resource_start(devp, 1); | |
2644 | break; | |
2645 | case BRD_ECH64PCI: | |
2646 | brdp->ioaddr2 = pci_resource_start(devp, 2); | |
2647 | brdp->ioaddr1 = pci_resource_start(devp, 1); | |
2648 | break; | |
2649 | case BRD_EASYIOPCI: | |
2650 | brdp->ioaddr1 = pci_resource_start(devp, 2); | |
2651 | brdp->ioaddr2 = pci_resource_start(devp, 1); | |
2652 | break; | |
2653 | default: | |
2654 | printk("STALLION: unknown PCI board type=%d\n", brdtype); | |
2655 | break; | |
2656 | } | |
2657 | ||
2658 | brdp->irq = devp->irq; | |
2659 | stl_brdinit(brdp); | |
2660 | ||
2661 | return(0); | |
2662 | } | |
2663 | ||
2664 | /*****************************************************************************/ | |
2665 | ||
2666 | /* | |
2667 | * Find all Stallion PCI boards that might be installed. Initialize each | |
2668 | * one as it is found. | |
2669 | */ | |
2670 | ||
2671 | ||
2672 | static inline int stl_findpcibrds(void) | |
2673 | { | |
2674 | struct pci_dev *dev = NULL; | |
2675 | int i, rc; | |
2676 | ||
2677 | #ifdef DEBUG | |
2678 | printk("stl_findpcibrds()\n"); | |
2679 | #endif | |
2680 | ||
2681 | for (i = 0; (i < stl_nrpcibrds); i++) | |
2682 | while ((dev = pci_find_device(stl_pcibrds[i].vendid, | |
2683 | stl_pcibrds[i].devid, dev))) { | |
2684 | ||
2685 | /* | |
2686 | * Found a device on the PCI bus that has our vendor and | |
2687 | * device ID. Need to check now that it is really us. | |
2688 | */ | |
2689 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) | |
2690 | continue; | |
2691 | ||
2692 | rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev); | |
2693 | if (rc) | |
2694 | return(rc); | |
2695 | } | |
2696 | ||
2697 | return(0); | |
2698 | } | |
2699 | ||
2700 | #endif | |
2701 | ||
2702 | /*****************************************************************************/ | |
2703 | ||
2704 | /* | |
2705 | * Scan through all the boards in the configuration and see what we | |
2706 | * can find. Handle EIO and the ECH boards a little differently here | |
2707 | * since the initial search and setup is too different. | |
2708 | */ | |
2709 | ||
2710 | static inline int stl_initbrds(void) | |
2711 | { | |
2712 | stlbrd_t *brdp; | |
2713 | stlconf_t *confp; | |
2714 | int i; | |
2715 | ||
2716 | #ifdef DEBUG | |
2717 | printk("stl_initbrds()\n"); | |
2718 | #endif | |
2719 | ||
2720 | if (stl_nrbrds > STL_MAXBRDS) { | |
2721 | printk("STALLION: too many boards in configuration table, " | |
2722 | "truncating to %d\n", STL_MAXBRDS); | |
2723 | stl_nrbrds = STL_MAXBRDS; | |
2724 | } | |
2725 | ||
2726 | /* | |
2727 | * Firstly scan the list of static boards configured. Allocate | |
2728 | * resources and initialize the boards as found. | |
2729 | */ | |
2730 | for (i = 0; (i < stl_nrbrds); i++) { | |
2731 | confp = &stl_brdconf[i]; | |
2732 | stl_parsebrd(confp, stl_brdsp[i]); | |
2733 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) | |
2734 | return(-ENOMEM); | |
2735 | brdp->brdnr = i; | |
2736 | brdp->brdtype = confp->brdtype; | |
2737 | brdp->ioaddr1 = confp->ioaddr1; | |
2738 | brdp->ioaddr2 = confp->ioaddr2; | |
2739 | brdp->irq = confp->irq; | |
2740 | brdp->irqtype = confp->irqtype; | |
2741 | stl_brdinit(brdp); | |
2742 | } | |
2743 | ||
2744 | /* | |
2745 | * Find any dynamically supported boards. That is via module load | |
2746 | * line options or auto-detected on the PCI bus. | |
2747 | */ | |
2748 | stl_argbrds(); | |
2749 | #ifdef CONFIG_PCI | |
2750 | stl_findpcibrds(); | |
2751 | #endif | |
2752 | ||
2753 | return(0); | |
2754 | } | |
2755 | ||
2756 | /*****************************************************************************/ | |
2757 | ||
2758 | /* | |
2759 | * Return the board stats structure to user app. | |
2760 | */ | |
2761 | ||
2762 | static int stl_getbrdstats(combrd_t __user *bp) | |
2763 | { | |
2764 | stlbrd_t *brdp; | |
2765 | stlpanel_t *panelp; | |
2766 | int i; | |
2767 | ||
2768 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) | |
2769 | return -EFAULT; | |
2770 | if (stl_brdstats.brd >= STL_MAXBRDS) | |
2771 | return(-ENODEV); | |
2772 | brdp = stl_brds[stl_brdstats.brd]; | |
2773 | if (brdp == (stlbrd_t *) NULL) | |
2774 | return(-ENODEV); | |
2775 | ||
2776 | memset(&stl_brdstats, 0, sizeof(combrd_t)); | |
2777 | stl_brdstats.brd = brdp->brdnr; | |
2778 | stl_brdstats.type = brdp->brdtype; | |
2779 | stl_brdstats.hwid = brdp->hwid; | |
2780 | stl_brdstats.state = brdp->state; | |
2781 | stl_brdstats.ioaddr = brdp->ioaddr1; | |
2782 | stl_brdstats.ioaddr2 = brdp->ioaddr2; | |
2783 | stl_brdstats.irq = brdp->irq; | |
2784 | stl_brdstats.nrpanels = brdp->nrpanels; | |
2785 | stl_brdstats.nrports = brdp->nrports; | |
2786 | for (i = 0; (i < brdp->nrpanels); i++) { | |
2787 | panelp = brdp->panels[i]; | |
2788 | stl_brdstats.panels[i].panel = i; | |
2789 | stl_brdstats.panels[i].hwid = panelp->hwid; | |
2790 | stl_brdstats.panels[i].nrports = panelp->nrports; | |
2791 | } | |
2792 | ||
2793 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; | |
2794 | } | |
2795 | ||
2796 | /*****************************************************************************/ | |
2797 | ||
2798 | /* | |
2799 | * Resolve the referenced port number into a port struct pointer. | |
2800 | */ | |
2801 | ||
2802 | static stlport_t *stl_getport(int brdnr, int panelnr, int portnr) | |
2803 | { | |
2804 | stlbrd_t *brdp; | |
2805 | stlpanel_t *panelp; | |
2806 | ||
2807 | if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) | |
2808 | return((stlport_t *) NULL); | |
2809 | brdp = stl_brds[brdnr]; | |
2810 | if (brdp == (stlbrd_t *) NULL) | |
2811 | return((stlport_t *) NULL); | |
2812 | if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) | |
2813 | return((stlport_t *) NULL); | |
2814 | panelp = brdp->panels[panelnr]; | |
2815 | if (panelp == (stlpanel_t *) NULL) | |
2816 | return((stlport_t *) NULL); | |
2817 | if ((portnr < 0) || (portnr >= panelp->nrports)) | |
2818 | return((stlport_t *) NULL); | |
2819 | return(panelp->ports[portnr]); | |
2820 | } | |
2821 | ||
2822 | /*****************************************************************************/ | |
2823 | ||
2824 | /* | |
2825 | * Return the port stats structure to user app. A NULL port struct | |
2826 | * pointer passed in means that we need to find out from the app | |
2827 | * what port to get stats for (used through board control device). | |
2828 | */ | |
2829 | ||
2830 | static int stl_getportstats(stlport_t *portp, comstats_t __user *cp) | |
2831 | { | |
2832 | unsigned char *head, *tail; | |
2833 | unsigned long flags; | |
2834 | ||
2835 | if (!portp) { | |
2836 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) | |
2837 | return -EFAULT; | |
2838 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, | |
2839 | stl_comstats.port); | |
2840 | if (portp == (stlport_t *) NULL) | |
2841 | return(-ENODEV); | |
2842 | } | |
2843 | ||
2844 | portp->stats.state = portp->istate; | |
2845 | portp->stats.flags = portp->flags; | |
2846 | portp->stats.hwid = portp->hwid; | |
2847 | ||
2848 | portp->stats.ttystate = 0; | |
2849 | portp->stats.cflags = 0; | |
2850 | portp->stats.iflags = 0; | |
2851 | portp->stats.oflags = 0; | |
2852 | portp->stats.lflags = 0; | |
2853 | portp->stats.rxbuffered = 0; | |
2854 | ||
b65b5b59 | 2855 | spin_lock_irqsave(&stallion_lock, flags); |
1da177e4 LT |
2856 | if (portp->tty != (struct tty_struct *) NULL) { |
2857 | if (portp->tty->driver_data == portp) { | |
2858 | portp->stats.ttystate = portp->tty->flags; | |
33f0f88f AC |
2859 | /* No longer available as a statistic */ |
2860 | portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ | |
1da177e4 LT |
2861 | if (portp->tty->termios != (struct termios *) NULL) { |
2862 | portp->stats.cflags = portp->tty->termios->c_cflag; | |
2863 | portp->stats.iflags = portp->tty->termios->c_iflag; | |
2864 | portp->stats.oflags = portp->tty->termios->c_oflag; | |
2865 | portp->stats.lflags = portp->tty->termios->c_lflag; | |
2866 | } | |
2867 | } | |
2868 | } | |
b65b5b59 | 2869 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
2870 | |
2871 | head = portp->tx.head; | |
2872 | tail = portp->tx.tail; | |
2873 | portp->stats.txbuffered = ((head >= tail) ? (head - tail) : | |
2874 | (STL_TXBUFSIZE - (tail - head))); | |
2875 | ||
2876 | portp->stats.signals = (unsigned long) stl_getsignals(portp); | |
2877 | ||
2878 | return copy_to_user(cp, &portp->stats, | |
2879 | sizeof(comstats_t)) ? -EFAULT : 0; | |
2880 | } | |
2881 | ||
2882 | /*****************************************************************************/ | |
2883 | ||
2884 | /* | |
2885 | * Clear the port stats structure. We also return it zeroed out... | |
2886 | */ | |
2887 | ||
2888 | static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp) | |
2889 | { | |
2890 | if (!portp) { | |
2891 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) | |
2892 | return -EFAULT; | |
2893 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, | |
2894 | stl_comstats.port); | |
2895 | if (portp == (stlport_t *) NULL) | |
2896 | return(-ENODEV); | |
2897 | } | |
2898 | ||
2899 | memset(&portp->stats, 0, sizeof(comstats_t)); | |
2900 | portp->stats.brd = portp->brdnr; | |
2901 | portp->stats.panel = portp->panelnr; | |
2902 | portp->stats.port = portp->portnr; | |
2903 | return copy_to_user(cp, &portp->stats, | |
2904 | sizeof(comstats_t)) ? -EFAULT : 0; | |
2905 | } | |
2906 | ||
2907 | /*****************************************************************************/ | |
2908 | ||
2909 | /* | |
2910 | * Return the entire driver ports structure to a user app. | |
2911 | */ | |
2912 | ||
2913 | static int stl_getportstruct(stlport_t __user *arg) | |
2914 | { | |
2915 | stlport_t *portp; | |
2916 | ||
2917 | if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t))) | |
2918 | return -EFAULT; | |
2919 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, | |
2920 | stl_dummyport.portnr); | |
2921 | if (!portp) | |
2922 | return -ENODEV; | |
2923 | return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0; | |
2924 | } | |
2925 | ||
2926 | /*****************************************************************************/ | |
2927 | ||
2928 | /* | |
2929 | * Return the entire driver board structure to a user app. | |
2930 | */ | |
2931 | ||
2932 | static int stl_getbrdstruct(stlbrd_t __user *arg) | |
2933 | { | |
2934 | stlbrd_t *brdp; | |
2935 | ||
2936 | if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t))) | |
2937 | return -EFAULT; | |
2938 | if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) | |
2939 | return -ENODEV; | |
2940 | brdp = stl_brds[stl_dummybrd.brdnr]; | |
2941 | if (!brdp) | |
2942 | return(-ENODEV); | |
2943 | return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0; | |
2944 | } | |
2945 | ||
2946 | /*****************************************************************************/ | |
2947 | ||
2948 | /* | |
2949 | * The "staliomem" device is also required to do some special operations | |
2950 | * on the board and/or ports. In this driver it is mostly used for stats | |
2951 | * collection. | |
2952 | */ | |
2953 | ||
2954 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) | |
2955 | { | |
2956 | int brdnr, rc; | |
2957 | void __user *argp = (void __user *)arg; | |
2958 | ||
2959 | #ifdef DEBUG | |
2960 | printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, | |
2961 | (int) fp, cmd, (int) arg); | |
2962 | #endif | |
2963 | ||
2964 | brdnr = iminor(ip); | |
2965 | if (brdnr >= STL_MAXBRDS) | |
2966 | return(-ENODEV); | |
2967 | rc = 0; | |
2968 | ||
2969 | switch (cmd) { | |
2970 | case COM_GETPORTSTATS: | |
2971 | rc = stl_getportstats(NULL, argp); | |
2972 | break; | |
2973 | case COM_CLRPORTSTATS: | |
2974 | rc = stl_clrportstats(NULL, argp); | |
2975 | break; | |
2976 | case COM_GETBRDSTATS: | |
2977 | rc = stl_getbrdstats(argp); | |
2978 | break; | |
2979 | case COM_READPORT: | |
2980 | rc = stl_getportstruct(argp); | |
2981 | break; | |
2982 | case COM_READBOARD: | |
2983 | rc = stl_getbrdstruct(argp); | |
2984 | break; | |
2985 | default: | |
2986 | rc = -ENOIOCTLCMD; | |
2987 | break; | |
2988 | } | |
2989 | ||
2990 | return(rc); | |
2991 | } | |
2992 | ||
b68e31d0 | 2993 | static const struct tty_operations stl_ops = { |
1da177e4 LT |
2994 | .open = stl_open, |
2995 | .close = stl_close, | |
2996 | .write = stl_write, | |
2997 | .put_char = stl_putchar, | |
2998 | .flush_chars = stl_flushchars, | |
2999 | .write_room = stl_writeroom, | |
3000 | .chars_in_buffer = stl_charsinbuffer, | |
3001 | .ioctl = stl_ioctl, | |
3002 | .set_termios = stl_settermios, | |
3003 | .throttle = stl_throttle, | |
3004 | .unthrottle = stl_unthrottle, | |
3005 | .stop = stl_stop, | |
3006 | .start = stl_start, | |
3007 | .hangup = stl_hangup, | |
3008 | .flush_buffer = stl_flushbuffer, | |
3009 | .break_ctl = stl_breakctl, | |
3010 | .wait_until_sent = stl_waituntilsent, | |
3011 | .send_xchar = stl_sendxchar, | |
3012 | .read_proc = stl_readproc, | |
3013 | .tiocmget = stl_tiocmget, | |
3014 | .tiocmset = stl_tiocmset, | |
3015 | }; | |
3016 | ||
3017 | /*****************************************************************************/ | |
3018 | ||
408b664a | 3019 | static int __init stl_init(void) |
1da177e4 LT |
3020 | { |
3021 | int i; | |
3022 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); | |
3023 | ||
effc8b70 AC |
3024 | spin_lock_init(&stallion_lock); |
3025 | spin_lock_init(&brd_lock); | |
3026 | ||
1da177e4 LT |
3027 | stl_initbrds(); |
3028 | ||
3029 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); | |
3030 | if (!stl_serial) | |
3031 | return -1; | |
3032 | ||
1da177e4 LT |
3033 | /* |
3034 | * Set up a character driver for per board stuff. This is mainly used | |
3035 | * to do stats ioctls on the ports. | |
3036 | */ | |
3037 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) | |
3038 | printk("STALLION: failed to register serial board device\n"); | |
1da177e4 | 3039 | |
ca8eca68 | 3040 | stallion_class = class_create(THIS_MODULE, "staliomem"); |
7c69ef79 | 3041 | for (i = 0; i < 4; i++) |
53f46542 GKH |
3042 | class_device_create(stallion_class, NULL, |
3043 | MKDEV(STL_SIOMEMMAJOR, i), NULL, | |
3044 | "staliomem%d", i); | |
1da177e4 LT |
3045 | |
3046 | stl_serial->owner = THIS_MODULE; | |
3047 | stl_serial->driver_name = stl_drvname; | |
3048 | stl_serial->name = "ttyE"; | |
1da177e4 LT |
3049 | stl_serial->major = STL_SERIALMAJOR; |
3050 | stl_serial->minor_start = 0; | |
3051 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; | |
3052 | stl_serial->subtype = SERIAL_TYPE_NORMAL; | |
3053 | stl_serial->init_termios = stl_deftermios; | |
3054 | stl_serial->flags = TTY_DRIVER_REAL_RAW; | |
3055 | tty_set_operations(stl_serial, &stl_ops); | |
3056 | ||
3057 | if (tty_register_driver(stl_serial)) { | |
3058 | put_tty_driver(stl_serial); | |
3059 | printk("STALLION: failed to register serial driver\n"); | |
3060 | return -1; | |
3061 | } | |
3062 | ||
014c2544 | 3063 | return 0; |
1da177e4 LT |
3064 | } |
3065 | ||
3066 | /*****************************************************************************/ | |
3067 | /* CD1400 HARDWARE FUNCTIONS */ | |
3068 | /*****************************************************************************/ | |
3069 | ||
3070 | /* | |
3071 | * These functions get/set/update the registers of the cd1400 UARTs. | |
3072 | * Access to the cd1400 registers is via an address/data io port pair. | |
3073 | * (Maybe should make this inline...) | |
3074 | */ | |
3075 | ||
3076 | static int stl_cd1400getreg(stlport_t *portp, int regnr) | |
3077 | { | |
3078 | outb((regnr + portp->uartaddr), portp->ioaddr); | |
014c2544 | 3079 | return inb(portp->ioaddr + EREG_DATA); |
1da177e4 LT |
3080 | } |
3081 | ||
3082 | static void stl_cd1400setreg(stlport_t *portp, int regnr, int value) | |
3083 | { | |
3084 | outb((regnr + portp->uartaddr), portp->ioaddr); | |
3085 | outb(value, portp->ioaddr + EREG_DATA); | |
3086 | } | |
3087 | ||
3088 | static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value) | |
3089 | { | |
3090 | outb((regnr + portp->uartaddr), portp->ioaddr); | |
3091 | if (inb(portp->ioaddr + EREG_DATA) != value) { | |
3092 | outb(value, portp->ioaddr + EREG_DATA); | |
014c2544 | 3093 | return 1; |
1da177e4 | 3094 | } |
014c2544 | 3095 | return 0; |
1da177e4 LT |
3096 | } |
3097 | ||
3098 | /*****************************************************************************/ | |
3099 | ||
3100 | /* | |
3101 | * Inbitialize the UARTs in a panel. We don't care what sort of board | |
3102 | * these ports are on - since the port io registers are almost | |
3103 | * identical when dealing with ports. | |
3104 | */ | |
3105 | ||
3106 | static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp) | |
3107 | { | |
3108 | unsigned int gfrcr; | |
3109 | int chipmask, i, j; | |
3110 | int nrchips, uartaddr, ioaddr; | |
b65b5b59 | 3111 | unsigned long flags; |
1da177e4 LT |
3112 | |
3113 | #ifdef DEBUG | |
3114 | printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); | |
3115 | #endif | |
3116 | ||
b65b5b59 | 3117 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3118 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
3119 | ||
3120 | /* | |
3121 | * Check that each chip is present and started up OK. | |
3122 | */ | |
3123 | chipmask = 0; | |
3124 | nrchips = panelp->nrports / CD1400_PORTS; | |
3125 | for (i = 0; (i < nrchips); i++) { | |
3126 | if (brdp->brdtype == BRD_ECHPCI) { | |
3127 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); | |
3128 | ioaddr = panelp->iobase; | |
3129 | } else { | |
3130 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); | |
3131 | } | |
3132 | uartaddr = (i & 0x01) ? 0x080 : 0; | |
3133 | outb((GFRCR + uartaddr), ioaddr); | |
3134 | outb(0, (ioaddr + EREG_DATA)); | |
3135 | outb((CCR + uartaddr), ioaddr); | |
3136 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); | |
3137 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); | |
3138 | outb((GFRCR + uartaddr), ioaddr); | |
3139 | for (j = 0; (j < CCR_MAXWAIT); j++) { | |
3140 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) | |
3141 | break; | |
3142 | } | |
3143 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { | |
3144 | printk("STALLION: cd1400 not responding, " | |
3145 | "brd=%d panel=%d chip=%d\n", | |
3146 | panelp->brdnr, panelp->panelnr, i); | |
3147 | continue; | |
3148 | } | |
3149 | chipmask |= (0x1 << i); | |
3150 | outb((PPR + uartaddr), ioaddr); | |
3151 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); | |
3152 | } | |
3153 | ||
3154 | BRDDISABLE(panelp->brdnr); | |
b65b5b59 | 3155 | spin_unlock_irqrestore(&brd_lock, flags); |
014c2544 | 3156 | return chipmask; |
1da177e4 LT |
3157 | } |
3158 | ||
3159 | /*****************************************************************************/ | |
3160 | ||
3161 | /* | |
3162 | * Initialize hardware specific port registers. | |
3163 | */ | |
3164 | ||
3165 | static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) | |
3166 | { | |
b65b5b59 | 3167 | unsigned long flags; |
1da177e4 LT |
3168 | #ifdef DEBUG |
3169 | printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n", | |
3170 | (int) brdp, (int) panelp, (int) portp); | |
3171 | #endif | |
3172 | ||
3173 | if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || | |
3174 | (portp == (stlport_t *) NULL)) | |
3175 | return; | |
3176 | ||
b65b5b59 | 3177 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3178 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
3179 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); | |
3180 | portp->uartaddr = (portp->portnr & 0x04) << 5; | |
3181 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); | |
3182 | ||
3183 | BRDENABLE(portp->brdnr, portp->pagenr); | |
3184 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3185 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); | |
3186 | portp->hwid = stl_cd1400getreg(portp, GFRCR); | |
3187 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3188 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3189 | } |
3190 | ||
3191 | /*****************************************************************************/ | |
3192 | ||
3193 | /* | |
3194 | * Wait for the command register to be ready. We will poll this, | |
3195 | * since it won't usually take too long to be ready. | |
3196 | */ | |
3197 | ||
3198 | static void stl_cd1400ccrwait(stlport_t *portp) | |
3199 | { | |
3200 | int i; | |
3201 | ||
3202 | for (i = 0; (i < CCR_MAXWAIT); i++) { | |
3203 | if (stl_cd1400getreg(portp, CCR) == 0) { | |
3204 | return; | |
3205 | } | |
3206 | } | |
3207 | ||
3208 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", | |
3209 | portp->portnr, portp->panelnr, portp->brdnr); | |
3210 | } | |
3211 | ||
3212 | /*****************************************************************************/ | |
3213 | ||
3214 | /* | |
3215 | * Set up the cd1400 registers for a port based on the termios port | |
3216 | * settings. | |
3217 | */ | |
3218 | ||
3219 | static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp) | |
3220 | { | |
3221 | stlbrd_t *brdp; | |
3222 | unsigned long flags; | |
3223 | unsigned int clkdiv, baudrate; | |
3224 | unsigned char cor1, cor2, cor3; | |
3225 | unsigned char cor4, cor5, ccr; | |
3226 | unsigned char srer, sreron, sreroff; | |
3227 | unsigned char mcor1, mcor2, rtpr; | |
3228 | unsigned char clk, div; | |
3229 | ||
3230 | cor1 = 0; | |
3231 | cor2 = 0; | |
3232 | cor3 = 0; | |
3233 | cor4 = 0; | |
3234 | cor5 = 0; | |
3235 | ccr = 0; | |
3236 | rtpr = 0; | |
3237 | clk = 0; | |
3238 | div = 0; | |
3239 | mcor1 = 0; | |
3240 | mcor2 = 0; | |
3241 | sreron = 0; | |
3242 | sreroff = 0; | |
3243 | ||
3244 | brdp = stl_brds[portp->brdnr]; | |
3245 | if (brdp == (stlbrd_t *) NULL) | |
3246 | return; | |
3247 | ||
3248 | /* | |
3249 | * Set up the RX char ignore mask with those RX error types we | |
3250 | * can ignore. We can get the cd1400 to help us out a little here, | |
3251 | * it will ignore parity errors and breaks for us. | |
3252 | */ | |
3253 | portp->rxignoremsk = 0; | |
3254 | if (tiosp->c_iflag & IGNPAR) { | |
3255 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); | |
3256 | cor1 |= COR1_PARIGNORE; | |
3257 | } | |
3258 | if (tiosp->c_iflag & IGNBRK) { | |
3259 | portp->rxignoremsk |= ST_BREAK; | |
3260 | cor4 |= COR4_IGNBRK; | |
3261 | } | |
3262 | ||
3263 | portp->rxmarkmsk = ST_OVERRUN; | |
3264 | if (tiosp->c_iflag & (INPCK | PARMRK)) | |
3265 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); | |
3266 | if (tiosp->c_iflag & BRKINT) | |
3267 | portp->rxmarkmsk |= ST_BREAK; | |
3268 | ||
3269 | /* | |
3270 | * Go through the char size, parity and stop bits and set all the | |
3271 | * option register appropriately. | |
3272 | */ | |
3273 | switch (tiosp->c_cflag & CSIZE) { | |
3274 | case CS5: | |
3275 | cor1 |= COR1_CHL5; | |
3276 | break; | |
3277 | case CS6: | |
3278 | cor1 |= COR1_CHL6; | |
3279 | break; | |
3280 | case CS7: | |
3281 | cor1 |= COR1_CHL7; | |
3282 | break; | |
3283 | default: | |
3284 | cor1 |= COR1_CHL8; | |
3285 | break; | |
3286 | } | |
3287 | ||
3288 | if (tiosp->c_cflag & CSTOPB) | |
3289 | cor1 |= COR1_STOP2; | |
3290 | else | |
3291 | cor1 |= COR1_STOP1; | |
3292 | ||
3293 | if (tiosp->c_cflag & PARENB) { | |
3294 | if (tiosp->c_cflag & PARODD) | |
3295 | cor1 |= (COR1_PARENB | COR1_PARODD); | |
3296 | else | |
3297 | cor1 |= (COR1_PARENB | COR1_PAREVEN); | |
3298 | } else { | |
3299 | cor1 |= COR1_PARNONE; | |
3300 | } | |
3301 | ||
3302 | /* | |
3303 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing | |
3304 | * space for hardware flow control and the like. This should be set to | |
3305 | * VMIN. Also here we will set the RX data timeout to 10ms - this should | |
3306 | * really be based on VTIME. | |
3307 | */ | |
3308 | cor3 |= FIFO_RXTHRESHOLD; | |
3309 | rtpr = 2; | |
3310 | ||
3311 | /* | |
3312 | * Calculate the baud rate timers. For now we will just assume that | |
3313 | * the input and output baud are the same. Could have used a baud | |
3314 | * table here, but this way we can generate virtually any baud rate | |
3315 | * we like! | |
3316 | */ | |
3317 | baudrate = tiosp->c_cflag & CBAUD; | |
3318 | if (baudrate & CBAUDEX) { | |
3319 | baudrate &= ~CBAUDEX; | |
3320 | if ((baudrate < 1) || (baudrate > 4)) | |
3321 | tiosp->c_cflag &= ~CBAUDEX; | |
3322 | else | |
3323 | baudrate += 15; | |
3324 | } | |
3325 | baudrate = stl_baudrates[baudrate]; | |
3326 | if ((tiosp->c_cflag & CBAUD) == B38400) { | |
3327 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
3328 | baudrate = 57600; | |
3329 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
3330 | baudrate = 115200; | |
3331 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) | |
3332 | baudrate = 230400; | |
3333 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
3334 | baudrate = 460800; | |
3335 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) | |
3336 | baudrate = (portp->baud_base / portp->custom_divisor); | |
3337 | } | |
3338 | if (baudrate > STL_CD1400MAXBAUD) | |
3339 | baudrate = STL_CD1400MAXBAUD; | |
3340 | ||
3341 | if (baudrate > 0) { | |
3342 | for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { | |
3343 | clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); | |
3344 | if (clkdiv < 0x100) | |
3345 | break; | |
3346 | } | |
3347 | div = (unsigned char) clkdiv; | |
3348 | } | |
3349 | ||
3350 | /* | |
3351 | * Check what form of modem signaling is required and set it up. | |
3352 | */ | |
3353 | if ((tiosp->c_cflag & CLOCAL) == 0) { | |
3354 | mcor1 |= MCOR1_DCD; | |
3355 | mcor2 |= MCOR2_DCD; | |
3356 | sreron |= SRER_MODEM; | |
3357 | portp->flags |= ASYNC_CHECK_CD; | |
3358 | } else { | |
3359 | portp->flags &= ~ASYNC_CHECK_CD; | |
3360 | } | |
3361 | ||
3362 | /* | |
3363 | * Setup cd1400 enhanced modes if we can. In particular we want to | |
3364 | * handle as much of the flow control as possible automatically. As | |
3365 | * well as saving a few CPU cycles it will also greatly improve flow | |
3366 | * control reliability. | |
3367 | */ | |
3368 | if (tiosp->c_iflag & IXON) { | |
3369 | cor2 |= COR2_TXIBE; | |
3370 | cor3 |= COR3_SCD12; | |
3371 | if (tiosp->c_iflag & IXANY) | |
3372 | cor2 |= COR2_IXM; | |
3373 | } | |
3374 | ||
3375 | if (tiosp->c_cflag & CRTSCTS) { | |
3376 | cor2 |= COR2_CTSAE; | |
3377 | mcor1 |= FIFO_RTSTHRESHOLD; | |
3378 | } | |
3379 | ||
3380 | /* | |
3381 | * All cd1400 register values calculated so go through and set | |
3382 | * them all up. | |
3383 | */ | |
3384 | ||
3385 | #ifdef DEBUG | |
3386 | printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", | |
3387 | portp->portnr, portp->panelnr, portp->brdnr); | |
3388 | printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", | |
3389 | cor1, cor2, cor3, cor4, cor5); | |
3390 | printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", | |
3391 | mcor1, mcor2, rtpr, sreron, sreroff); | |
3392 | printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); | |
3393 | printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", | |
3394 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], | |
3395 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); | |
3396 | #endif | |
3397 | ||
b65b5b59 | 3398 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3399 | BRDENABLE(portp->brdnr, portp->pagenr); |
3400 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); | |
3401 | srer = stl_cd1400getreg(portp, SRER); | |
3402 | stl_cd1400setreg(portp, SRER, 0); | |
3403 | if (stl_cd1400updatereg(portp, COR1, cor1)) | |
3404 | ccr = 1; | |
3405 | if (stl_cd1400updatereg(portp, COR2, cor2)) | |
3406 | ccr = 1; | |
3407 | if (stl_cd1400updatereg(portp, COR3, cor3)) | |
3408 | ccr = 1; | |
3409 | if (ccr) { | |
3410 | stl_cd1400ccrwait(portp); | |
3411 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); | |
3412 | } | |
3413 | stl_cd1400setreg(portp, COR4, cor4); | |
3414 | stl_cd1400setreg(portp, COR5, cor5); | |
3415 | stl_cd1400setreg(portp, MCOR1, mcor1); | |
3416 | stl_cd1400setreg(portp, MCOR2, mcor2); | |
3417 | if (baudrate > 0) { | |
3418 | stl_cd1400setreg(portp, TCOR, clk); | |
3419 | stl_cd1400setreg(portp, TBPR, div); | |
3420 | stl_cd1400setreg(portp, RCOR, clk); | |
3421 | stl_cd1400setreg(portp, RBPR, div); | |
3422 | } | |
3423 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); | |
3424 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); | |
3425 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); | |
3426 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); | |
3427 | stl_cd1400setreg(portp, RTPR, rtpr); | |
3428 | mcor1 = stl_cd1400getreg(portp, MSVR1); | |
3429 | if (mcor1 & MSVR1_DCD) | |
3430 | portp->sigs |= TIOCM_CD; | |
3431 | else | |
3432 | portp->sigs &= ~TIOCM_CD; | |
3433 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); | |
3434 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3435 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3436 | } |
3437 | ||
3438 | /*****************************************************************************/ | |
3439 | ||
3440 | /* | |
3441 | * Set the state of the DTR and RTS signals. | |
3442 | */ | |
3443 | ||
3444 | static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts) | |
3445 | { | |
3446 | unsigned char msvr1, msvr2; | |
3447 | unsigned long flags; | |
3448 | ||
3449 | #ifdef DEBUG | |
3450 | printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n", | |
3451 | (int) portp, dtr, rts); | |
3452 | #endif | |
3453 | ||
3454 | msvr1 = 0; | |
3455 | msvr2 = 0; | |
3456 | if (dtr > 0) | |
3457 | msvr1 = MSVR1_DTR; | |
3458 | if (rts > 0) | |
3459 | msvr2 = MSVR2_RTS; | |
3460 | ||
b65b5b59 | 3461 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3462 | BRDENABLE(portp->brdnr, portp->pagenr); |
3463 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3464 | if (rts >= 0) | |
3465 | stl_cd1400setreg(portp, MSVR2, msvr2); | |
3466 | if (dtr >= 0) | |
3467 | stl_cd1400setreg(portp, MSVR1, msvr1); | |
3468 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3469 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3470 | } |
3471 | ||
3472 | /*****************************************************************************/ | |
3473 | ||
3474 | /* | |
3475 | * Return the state of the signals. | |
3476 | */ | |
3477 | ||
3478 | static int stl_cd1400getsignals(stlport_t *portp) | |
3479 | { | |
3480 | unsigned char msvr1, msvr2; | |
3481 | unsigned long flags; | |
3482 | int sigs; | |
3483 | ||
3484 | #ifdef DEBUG | |
3485 | printk("stl_cd1400getsignals(portp=%x)\n", (int) portp); | |
3486 | #endif | |
3487 | ||
b65b5b59 | 3488 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3489 | BRDENABLE(portp->brdnr, portp->pagenr); |
3490 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3491 | msvr1 = stl_cd1400getreg(portp, MSVR1); | |
3492 | msvr2 = stl_cd1400getreg(portp, MSVR2); | |
3493 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3494 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3495 | |
3496 | sigs = 0; | |
3497 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; | |
3498 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; | |
3499 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; | |
3500 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; | |
3501 | #if 0 | |
3502 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; | |
3503 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; | |
3504 | #else | |
3505 | sigs |= TIOCM_DSR; | |
3506 | #endif | |
014c2544 | 3507 | return sigs; |
1da177e4 LT |
3508 | } |
3509 | ||
3510 | /*****************************************************************************/ | |
3511 | ||
3512 | /* | |
3513 | * Enable/Disable the Transmitter and/or Receiver. | |
3514 | */ | |
3515 | ||
3516 | static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx) | |
3517 | { | |
3518 | unsigned char ccr; | |
3519 | unsigned long flags; | |
3520 | ||
3521 | #ifdef DEBUG | |
3522 | printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n", | |
3523 | (int) portp, rx, tx); | |
3524 | #endif | |
3525 | ccr = 0; | |
3526 | ||
3527 | if (tx == 0) | |
3528 | ccr |= CCR_TXDISABLE; | |
3529 | else if (tx > 0) | |
3530 | ccr |= CCR_TXENABLE; | |
3531 | if (rx == 0) | |
3532 | ccr |= CCR_RXDISABLE; | |
3533 | else if (rx > 0) | |
3534 | ccr |= CCR_RXENABLE; | |
3535 | ||
b65b5b59 | 3536 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3537 | BRDENABLE(portp->brdnr, portp->pagenr); |
3538 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3539 | stl_cd1400ccrwait(portp); | |
3540 | stl_cd1400setreg(portp, CCR, ccr); | |
3541 | stl_cd1400ccrwait(portp); | |
3542 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3543 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3544 | } |
3545 | ||
3546 | /*****************************************************************************/ | |
3547 | ||
3548 | /* | |
3549 | * Start/stop the Transmitter and/or Receiver. | |
3550 | */ | |
3551 | ||
3552 | static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx) | |
3553 | { | |
3554 | unsigned char sreron, sreroff; | |
3555 | unsigned long flags; | |
3556 | ||
3557 | #ifdef DEBUG | |
3558 | printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n", | |
3559 | (int) portp, rx, tx); | |
3560 | #endif | |
3561 | ||
3562 | sreron = 0; | |
3563 | sreroff = 0; | |
3564 | if (tx == 0) | |
3565 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); | |
3566 | else if (tx == 1) | |
3567 | sreron |= SRER_TXDATA; | |
3568 | else if (tx >= 2) | |
3569 | sreron |= SRER_TXEMPTY; | |
3570 | if (rx == 0) | |
3571 | sreroff |= SRER_RXDATA; | |
3572 | else if (rx > 0) | |
3573 | sreron |= SRER_RXDATA; | |
3574 | ||
b65b5b59 | 3575 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3576 | BRDENABLE(portp->brdnr, portp->pagenr); |
3577 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3578 | stl_cd1400setreg(portp, SRER, | |
3579 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); | |
3580 | BRDDISABLE(portp->brdnr); | |
3581 | if (tx > 0) | |
3582 | set_bit(ASYI_TXBUSY, &portp->istate); | |
b65b5b59 | 3583 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3584 | } |
3585 | ||
3586 | /*****************************************************************************/ | |
3587 | ||
3588 | /* | |
3589 | * Disable all interrupts from this port. | |
3590 | */ | |
3591 | ||
3592 | static void stl_cd1400disableintrs(stlport_t *portp) | |
3593 | { | |
3594 | unsigned long flags; | |
3595 | ||
3596 | #ifdef DEBUG | |
3597 | printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp); | |
3598 | #endif | |
b65b5b59 | 3599 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3600 | BRDENABLE(portp->brdnr, portp->pagenr); |
3601 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3602 | stl_cd1400setreg(portp, SRER, 0); | |
3603 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3604 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3605 | } |
3606 | ||
3607 | /*****************************************************************************/ | |
3608 | ||
3609 | static void stl_cd1400sendbreak(stlport_t *portp, int len) | |
3610 | { | |
3611 | unsigned long flags; | |
3612 | ||
3613 | #ifdef DEBUG | |
3614 | printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len); | |
3615 | #endif | |
3616 | ||
b65b5b59 | 3617 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3618 | BRDENABLE(portp->brdnr, portp->pagenr); |
3619 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3620 | stl_cd1400setreg(portp, SRER, | |
3621 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | | |
3622 | SRER_TXEMPTY)); | |
3623 | BRDDISABLE(portp->brdnr); | |
3624 | portp->brklen = len; | |
3625 | if (len == 1) | |
3626 | portp->stats.txbreaks++; | |
b65b5b59 | 3627 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3628 | } |
3629 | ||
3630 | /*****************************************************************************/ | |
3631 | ||
3632 | /* | |
3633 | * Take flow control actions... | |
3634 | */ | |
3635 | ||
3636 | static void stl_cd1400flowctrl(stlport_t *portp, int state) | |
3637 | { | |
3638 | struct tty_struct *tty; | |
3639 | unsigned long flags; | |
3640 | ||
3641 | #ifdef DEBUG | |
3642 | printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state); | |
3643 | #endif | |
3644 | ||
3645 | if (portp == (stlport_t *) NULL) | |
3646 | return; | |
3647 | tty = portp->tty; | |
3648 | if (tty == (struct tty_struct *) NULL) | |
3649 | return; | |
3650 | ||
b65b5b59 | 3651 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3652 | BRDENABLE(portp->brdnr, portp->pagenr); |
3653 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3654 | ||
3655 | if (state) { | |
3656 | if (tty->termios->c_iflag & IXOFF) { | |
3657 | stl_cd1400ccrwait(portp); | |
3658 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); | |
3659 | portp->stats.rxxon++; | |
3660 | stl_cd1400ccrwait(portp); | |
3661 | } | |
3662 | /* | |
3663 | * Question: should we return RTS to what it was before? It may | |
3664 | * have been set by an ioctl... Suppose not, since if you have | |
3665 | * hardware flow control set then it is pretty silly to go and | |
3666 | * set the RTS line by hand. | |
3667 | */ | |
3668 | if (tty->termios->c_cflag & CRTSCTS) { | |
3669 | stl_cd1400setreg(portp, MCOR1, | |
3670 | (stl_cd1400getreg(portp, MCOR1) | | |
3671 | FIFO_RTSTHRESHOLD)); | |
3672 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); | |
3673 | portp->stats.rxrtson++; | |
3674 | } | |
3675 | } else { | |
3676 | if (tty->termios->c_iflag & IXOFF) { | |
3677 | stl_cd1400ccrwait(portp); | |
3678 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); | |
3679 | portp->stats.rxxoff++; | |
3680 | stl_cd1400ccrwait(portp); | |
3681 | } | |
3682 | if (tty->termios->c_cflag & CRTSCTS) { | |
3683 | stl_cd1400setreg(portp, MCOR1, | |
3684 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); | |
3685 | stl_cd1400setreg(portp, MSVR2, 0); | |
3686 | portp->stats.rxrtsoff++; | |
3687 | } | |
3688 | } | |
3689 | ||
3690 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3691 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3692 | } |
3693 | ||
3694 | /*****************************************************************************/ | |
3695 | ||
3696 | /* | |
3697 | * Send a flow control character... | |
3698 | */ | |
3699 | ||
3700 | static void stl_cd1400sendflow(stlport_t *portp, int state) | |
3701 | { | |
3702 | struct tty_struct *tty; | |
3703 | unsigned long flags; | |
3704 | ||
3705 | #ifdef DEBUG | |
3706 | printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state); | |
3707 | #endif | |
3708 | ||
3709 | if (portp == (stlport_t *) NULL) | |
3710 | return; | |
3711 | tty = portp->tty; | |
3712 | if (tty == (struct tty_struct *) NULL) | |
3713 | return; | |
3714 | ||
b65b5b59 | 3715 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3716 | BRDENABLE(portp->brdnr, portp->pagenr); |
3717 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3718 | if (state) { | |
3719 | stl_cd1400ccrwait(portp); | |
3720 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); | |
3721 | portp->stats.rxxon++; | |
3722 | stl_cd1400ccrwait(portp); | |
3723 | } else { | |
3724 | stl_cd1400ccrwait(portp); | |
3725 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); | |
3726 | portp->stats.rxxoff++; | |
3727 | stl_cd1400ccrwait(portp); | |
3728 | } | |
3729 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3730 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3731 | } |
3732 | ||
3733 | /*****************************************************************************/ | |
3734 | ||
3735 | static void stl_cd1400flush(stlport_t *portp) | |
3736 | { | |
3737 | unsigned long flags; | |
3738 | ||
3739 | #ifdef DEBUG | |
3740 | printk("stl_cd1400flush(portp=%x)\n", (int) portp); | |
3741 | #endif | |
3742 | ||
3743 | if (portp == (stlport_t *) NULL) | |
3744 | return; | |
3745 | ||
b65b5b59 | 3746 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3747 | BRDENABLE(portp->brdnr, portp->pagenr); |
3748 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3749 | stl_cd1400ccrwait(portp); | |
3750 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); | |
3751 | stl_cd1400ccrwait(portp); | |
3752 | portp->tx.tail = portp->tx.head; | |
3753 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3754 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3755 | } |
3756 | ||
3757 | /*****************************************************************************/ | |
3758 | ||
3759 | /* | |
3760 | * Return the current state of data flow on this port. This is only | |
3761 | * really interresting when determining if data has fully completed | |
3762 | * transmission or not... This is easy for the cd1400, it accurately | |
3763 | * maintains the busy port flag. | |
3764 | */ | |
3765 | ||
3766 | static int stl_cd1400datastate(stlport_t *portp) | |
3767 | { | |
3768 | #ifdef DEBUG | |
3769 | printk("stl_cd1400datastate(portp=%x)\n", (int) portp); | |
3770 | #endif | |
3771 | ||
3772 | if (portp == (stlport_t *) NULL) | |
014c2544 | 3773 | return 0; |
1da177e4 | 3774 | |
014c2544 | 3775 | return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
1da177e4 LT |
3776 | } |
3777 | ||
3778 | /*****************************************************************************/ | |
3779 | ||
3780 | /* | |
3781 | * Interrupt service routine for cd1400 EasyIO boards. | |
3782 | */ | |
3783 | ||
3784 | static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase) | |
3785 | { | |
3786 | unsigned char svrtype; | |
3787 | ||
3788 | #ifdef DEBUG | |
3789 | printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n", | |
3790 | (int) panelp, iobase); | |
3791 | #endif | |
3792 | ||
b65b5b59 | 3793 | spin_lock(&brd_lock); |
1da177e4 LT |
3794 | outb(SVRR, iobase); |
3795 | svrtype = inb(iobase + EREG_DATA); | |
3796 | if (panelp->nrports > 4) { | |
3797 | outb((SVRR + 0x80), iobase); | |
3798 | svrtype |= inb(iobase + EREG_DATA); | |
3799 | } | |
3800 | ||
3801 | if (svrtype & SVRR_RX) | |
3802 | stl_cd1400rxisr(panelp, iobase); | |
3803 | else if (svrtype & SVRR_TX) | |
3804 | stl_cd1400txisr(panelp, iobase); | |
3805 | else if (svrtype & SVRR_MDM) | |
3806 | stl_cd1400mdmisr(panelp, iobase); | |
b65b5b59 AC |
3807 | |
3808 | spin_unlock(&brd_lock); | |
1da177e4 LT |
3809 | } |
3810 | ||
3811 | /*****************************************************************************/ | |
3812 | ||
3813 | /* | |
3814 | * Interrupt service routine for cd1400 panels. | |
3815 | */ | |
3816 | ||
3817 | static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase) | |
3818 | { | |
3819 | unsigned char svrtype; | |
3820 | ||
3821 | #ifdef DEBUG | |
3822 | printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp, | |
3823 | iobase); | |
3824 | #endif | |
3825 | ||
3826 | outb(SVRR, iobase); | |
3827 | svrtype = inb(iobase + EREG_DATA); | |
3828 | outb((SVRR + 0x80), iobase); | |
3829 | svrtype |= inb(iobase + EREG_DATA); | |
3830 | if (svrtype & SVRR_RX) | |
3831 | stl_cd1400rxisr(panelp, iobase); | |
3832 | else if (svrtype & SVRR_TX) | |
3833 | stl_cd1400txisr(panelp, iobase); | |
3834 | else if (svrtype & SVRR_MDM) | |
3835 | stl_cd1400mdmisr(panelp, iobase); | |
3836 | } | |
3837 | ||
3838 | ||
3839 | /*****************************************************************************/ | |
3840 | ||
3841 | /* | |
3842 | * Unfortunately we need to handle breaks in the TX data stream, since | |
3843 | * this is the only way to generate them on the cd1400. | |
3844 | */ | |
3845 | ||
3846 | static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr) | |
3847 | { | |
3848 | if (portp->brklen == 1) { | |
3849 | outb((COR2 + portp->uartaddr), ioaddr); | |
3850 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), | |
3851 | (ioaddr + EREG_DATA)); | |
3852 | outb((TDR + portp->uartaddr), ioaddr); | |
3853 | outb(ETC_CMD, (ioaddr + EREG_DATA)); | |
3854 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); | |
3855 | outb((SRER + portp->uartaddr), ioaddr); | |
3856 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), | |
3857 | (ioaddr + EREG_DATA)); | |
014c2544 | 3858 | return 1; |
1da177e4 LT |
3859 | } else if (portp->brklen > 1) { |
3860 | outb((TDR + portp->uartaddr), ioaddr); | |
3861 | outb(ETC_CMD, (ioaddr + EREG_DATA)); | |
3862 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); | |
3863 | portp->brklen = -1; | |
014c2544 | 3864 | return 1; |
1da177e4 LT |
3865 | } else { |
3866 | outb((COR2 + portp->uartaddr), ioaddr); | |
3867 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), | |
3868 | (ioaddr + EREG_DATA)); | |
3869 | portp->brklen = 0; | |
3870 | } | |
014c2544 | 3871 | return 0; |
1da177e4 LT |
3872 | } |
3873 | ||
3874 | /*****************************************************************************/ | |
3875 | ||
3876 | /* | |
3877 | * Transmit interrupt handler. This has gotta be fast! Handling TX | |
3878 | * chars is pretty simple, stuff as many as possible from the TX buffer | |
3879 | * into the cd1400 FIFO. Must also handle TX breaks here, since they | |
3880 | * are embedded as commands in the data stream. Oh no, had to use a goto! | |
3881 | * This could be optimized more, will do when I get time... | |
3882 | * In practice it is possible that interrupts are enabled but that the | |
3883 | * port has been hung up. Need to handle not having any TX buffer here, | |
3884 | * this is done by using the side effect that head and tail will also | |
3885 | * be NULL if the buffer has been freed. | |
3886 | */ | |
3887 | ||
3888 | static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr) | |
3889 | { | |
3890 | stlport_t *portp; | |
3891 | int len, stlen; | |
3892 | char *head, *tail; | |
3893 | unsigned char ioack, srer; | |
3894 | ||
3895 | #ifdef DEBUG | |
3896 | printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); | |
3897 | #endif | |
3898 | ||
3899 | ioack = inb(ioaddr + EREG_TXACK); | |
3900 | if (((ioack & panelp->ackmask) != 0) || | |
3901 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { | |
3902 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); | |
3903 | return; | |
3904 | } | |
3905 | portp = panelp->ports[(ioack >> 3)]; | |
3906 | ||
3907 | /* | |
3908 | * Unfortunately we need to handle breaks in the data stream, since | |
3909 | * this is the only way to generate them on the cd1400. Do it now if | |
3910 | * a break is to be sent. | |
3911 | */ | |
3912 | if (portp->brklen != 0) | |
3913 | if (stl_cd1400breakisr(portp, ioaddr)) | |
3914 | goto stl_txalldone; | |
3915 | ||
3916 | head = portp->tx.head; | |
3917 | tail = portp->tx.tail; | |
3918 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
3919 | if ((len == 0) || ((len < STL_TXBUFLOW) && | |
3920 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { | |
3921 | set_bit(ASYI_TXLOW, &portp->istate); | |
3922 | schedule_work(&portp->tqueue); | |
3923 | } | |
3924 | ||
3925 | if (len == 0) { | |
3926 | outb((SRER + portp->uartaddr), ioaddr); | |
3927 | srer = inb(ioaddr + EREG_DATA); | |
3928 | if (srer & SRER_TXDATA) { | |
3929 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; | |
3930 | } else { | |
3931 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); | |
3932 | clear_bit(ASYI_TXBUSY, &portp->istate); | |
3933 | } | |
3934 | outb(srer, (ioaddr + EREG_DATA)); | |
3935 | } else { | |
3936 | len = MIN(len, CD1400_TXFIFOSIZE); | |
3937 | portp->stats.txtotal += len; | |
3938 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); | |
3939 | outb((TDR + portp->uartaddr), ioaddr); | |
3940 | outsb((ioaddr + EREG_DATA), tail, stlen); | |
3941 | len -= stlen; | |
3942 | tail += stlen; | |
3943 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) | |
3944 | tail = portp->tx.buf; | |
3945 | if (len > 0) { | |
3946 | outsb((ioaddr + EREG_DATA), tail, len); | |
3947 | tail += len; | |
3948 | } | |
3949 | portp->tx.tail = tail; | |
3950 | } | |
3951 | ||
3952 | stl_txalldone: | |
3953 | outb((EOSRR + portp->uartaddr), ioaddr); | |
3954 | outb(0, (ioaddr + EREG_DATA)); | |
3955 | } | |
3956 | ||
3957 | /*****************************************************************************/ | |
3958 | ||
3959 | /* | |
3960 | * Receive character interrupt handler. Determine if we have good chars | |
3961 | * or bad chars and then process appropriately. Good chars are easy | |
3962 | * just shove the lot into the RX buffer and set all status byte to 0. | |
3963 | * If a bad RX char then process as required. This routine needs to be | |
3964 | * fast! In practice it is possible that we get an interrupt on a port | |
3965 | * that is closed. This can happen on hangups - since they completely | |
3966 | * shutdown a port not in user context. Need to handle this case. | |
3967 | */ | |
3968 | ||
3969 | static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr) | |
3970 | { | |
3971 | stlport_t *portp; | |
3972 | struct tty_struct *tty; | |
3973 | unsigned int ioack, len, buflen; | |
3974 | unsigned char status; | |
3975 | char ch; | |
3976 | ||
3977 | #ifdef DEBUG | |
3978 | printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); | |
3979 | #endif | |
3980 | ||
3981 | ioack = inb(ioaddr + EREG_RXACK); | |
3982 | if ((ioack & panelp->ackmask) != 0) { | |
3983 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); | |
3984 | return; | |
3985 | } | |
3986 | portp = panelp->ports[(ioack >> 3)]; | |
3987 | tty = portp->tty; | |
3988 | ||
3989 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { | |
3990 | outb((RDCR + portp->uartaddr), ioaddr); | |
3991 | len = inb(ioaddr + EREG_DATA); | |
33f0f88f | 3992 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
1da177e4 LT |
3993 | len = MIN(len, sizeof(stl_unwanted)); |
3994 | outb((RDSR + portp->uartaddr), ioaddr); | |
3995 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); | |
3996 | portp->stats.rxlost += len; | |
3997 | portp->stats.rxtotal += len; | |
3998 | } else { | |
3999 | len = MIN(len, buflen); | |
4000 | if (len > 0) { | |
33f0f88f | 4001 | unsigned char *ptr; |
1da177e4 | 4002 | outb((RDSR + portp->uartaddr), ioaddr); |
33f0f88f AC |
4003 | tty_prepare_flip_string(tty, &ptr, len); |
4004 | insb((ioaddr + EREG_DATA), ptr, len); | |
1da177e4 LT |
4005 | tty_schedule_flip(tty); |
4006 | portp->stats.rxtotal += len; | |
4007 | } | |
4008 | } | |
4009 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { | |
4010 | outb((RDSR + portp->uartaddr), ioaddr); | |
4011 | status = inb(ioaddr + EREG_DATA); | |
4012 | ch = inb(ioaddr + EREG_DATA); | |
4013 | if (status & ST_PARITY) | |
4014 | portp->stats.rxparity++; | |
4015 | if (status & ST_FRAMING) | |
4016 | portp->stats.rxframing++; | |
4017 | if (status & ST_OVERRUN) | |
4018 | portp->stats.rxoverrun++; | |
4019 | if (status & ST_BREAK) | |
4020 | portp->stats.rxbreaks++; | |
4021 | if (status & ST_SCHARMASK) { | |
4022 | if ((status & ST_SCHARMASK) == ST_SCHAR1) | |
4023 | portp->stats.txxon++; | |
4024 | if ((status & ST_SCHARMASK) == ST_SCHAR2) | |
4025 | portp->stats.txxoff++; | |
4026 | goto stl_rxalldone; | |
4027 | } | |
33f0f88f | 4028 | if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
1da177e4 LT |
4029 | if (portp->rxmarkmsk & status) { |
4030 | if (status & ST_BREAK) { | |
4031 | status = TTY_BREAK; | |
4032 | if (portp->flags & ASYNC_SAK) { | |
4033 | do_SAK(tty); | |
4034 | BRDENABLE(portp->brdnr, portp->pagenr); | |
4035 | } | |
4036 | } else if (status & ST_PARITY) { | |
4037 | status = TTY_PARITY; | |
4038 | } else if (status & ST_FRAMING) { | |
4039 | status = TTY_FRAME; | |
4040 | } else if(status & ST_OVERRUN) { | |
4041 | status = TTY_OVERRUN; | |
4042 | } else { | |
4043 | status = 0; | |
4044 | } | |
4045 | } else { | |
4046 | status = 0; | |
4047 | } | |
33f0f88f AC |
4048 | tty_insert_flip_char(tty, ch, status); |
4049 | tty_schedule_flip(tty); | |
1da177e4 LT |
4050 | } |
4051 | } else { | |
4052 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); | |
4053 | return; | |
4054 | } | |
4055 | ||
4056 | stl_rxalldone: | |
4057 | outb((EOSRR + portp->uartaddr), ioaddr); | |
4058 | outb(0, (ioaddr + EREG_DATA)); | |
4059 | } | |
4060 | ||
4061 | /*****************************************************************************/ | |
4062 | ||
4063 | /* | |
4064 | * Modem interrupt handler. The is called when the modem signal line | |
4065 | * (DCD) has changed state. Leave most of the work to the off-level | |
4066 | * processing routine. | |
4067 | */ | |
4068 | ||
4069 | static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr) | |
4070 | { | |
4071 | stlport_t *portp; | |
4072 | unsigned int ioack; | |
4073 | unsigned char misr; | |
4074 | ||
4075 | #ifdef DEBUG | |
4076 | printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp); | |
4077 | #endif | |
4078 | ||
4079 | ioack = inb(ioaddr + EREG_MDACK); | |
4080 | if (((ioack & panelp->ackmask) != 0) || | |
4081 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { | |
4082 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); | |
4083 | return; | |
4084 | } | |
4085 | portp = panelp->ports[(ioack >> 3)]; | |
4086 | ||
4087 | outb((MISR + portp->uartaddr), ioaddr); | |
4088 | misr = inb(ioaddr + EREG_DATA); | |
4089 | if (misr & MISR_DCD) { | |
4090 | set_bit(ASYI_DCDCHANGE, &portp->istate); | |
4091 | schedule_work(&portp->tqueue); | |
4092 | portp->stats.modem++; | |
4093 | } | |
4094 | ||
4095 | outb((EOSRR + portp->uartaddr), ioaddr); | |
4096 | outb(0, (ioaddr + EREG_DATA)); | |
4097 | } | |
4098 | ||
4099 | /*****************************************************************************/ | |
4100 | /* SC26198 HARDWARE FUNCTIONS */ | |
4101 | /*****************************************************************************/ | |
4102 | ||
4103 | /* | |
4104 | * These functions get/set/update the registers of the sc26198 UARTs. | |
4105 | * Access to the sc26198 registers is via an address/data io port pair. | |
4106 | * (Maybe should make this inline...) | |
4107 | */ | |
4108 | ||
4109 | static int stl_sc26198getreg(stlport_t *portp, int regnr) | |
4110 | { | |
4111 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
014c2544 | 4112 | return inb(portp->ioaddr + XP_DATA); |
1da177e4 LT |
4113 | } |
4114 | ||
4115 | static void stl_sc26198setreg(stlport_t *portp, int regnr, int value) | |
4116 | { | |
4117 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
4118 | outb(value, (portp->ioaddr + XP_DATA)); | |
4119 | } | |
4120 | ||
4121 | static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value) | |
4122 | { | |
4123 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
4124 | if (inb(portp->ioaddr + XP_DATA) != value) { | |
4125 | outb(value, (portp->ioaddr + XP_DATA)); | |
014c2544 | 4126 | return 1; |
1da177e4 | 4127 | } |
014c2544 | 4128 | return 0; |
1da177e4 LT |
4129 | } |
4130 | ||
4131 | /*****************************************************************************/ | |
4132 | ||
4133 | /* | |
4134 | * Functions to get and set the sc26198 global registers. | |
4135 | */ | |
4136 | ||
4137 | static int stl_sc26198getglobreg(stlport_t *portp, int regnr) | |
4138 | { | |
4139 | outb(regnr, (portp->ioaddr + XP_ADDR)); | |
014c2544 | 4140 | return inb(portp->ioaddr + XP_DATA); |
1da177e4 LT |
4141 | } |
4142 | ||
4143 | #if 0 | |
4144 | static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value) | |
4145 | { | |
4146 | outb(regnr, (portp->ioaddr + XP_ADDR)); | |
4147 | outb(value, (portp->ioaddr + XP_DATA)); | |
4148 | } | |
4149 | #endif | |
4150 | ||
4151 | /*****************************************************************************/ | |
4152 | ||
4153 | /* | |
4154 | * Inbitialize the UARTs in a panel. We don't care what sort of board | |
4155 | * these ports are on - since the port io registers are almost | |
4156 | * identical when dealing with ports. | |
4157 | */ | |
4158 | ||
4159 | static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp) | |
4160 | { | |
4161 | int chipmask, i; | |
4162 | int nrchips, ioaddr; | |
4163 | ||
4164 | #ifdef DEBUG | |
4165 | printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n", | |
4166 | (int) brdp, (int) panelp); | |
4167 | #endif | |
4168 | ||
4169 | BRDENABLE(panelp->brdnr, panelp->pagenr); | |
4170 | ||
4171 | /* | |
4172 | * Check that each chip is present and started up OK. | |
4173 | */ | |
4174 | chipmask = 0; | |
4175 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; | |
4176 | if (brdp->brdtype == BRD_ECHPCI) | |
4177 | outb(panelp->pagenr, brdp->ioctrl); | |
4178 | ||
4179 | for (i = 0; (i < nrchips); i++) { | |
4180 | ioaddr = panelp->iobase + (i * 4); | |
4181 | outb(SCCR, (ioaddr + XP_ADDR)); | |
4182 | outb(CR_RESETALL, (ioaddr + XP_DATA)); | |
4183 | outb(TSTR, (ioaddr + XP_ADDR)); | |
4184 | if (inb(ioaddr + XP_DATA) != 0) { | |
4185 | printk("STALLION: sc26198 not responding, " | |
4186 | "brd=%d panel=%d chip=%d\n", | |
4187 | panelp->brdnr, panelp->panelnr, i); | |
4188 | continue; | |
4189 | } | |
4190 | chipmask |= (0x1 << i); | |
4191 | outb(GCCR, (ioaddr + XP_ADDR)); | |
4192 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); | |
4193 | outb(WDTRCR, (ioaddr + XP_ADDR)); | |
4194 | outb(0xff, (ioaddr + XP_DATA)); | |
4195 | } | |
4196 | ||
4197 | BRDDISABLE(panelp->brdnr); | |
014c2544 | 4198 | return chipmask; |
1da177e4 LT |
4199 | } |
4200 | ||
4201 | /*****************************************************************************/ | |
4202 | ||
4203 | /* | |
4204 | * Initialize hardware specific port registers. | |
4205 | */ | |
4206 | ||
4207 | static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) | |
4208 | { | |
4209 | #ifdef DEBUG | |
4210 | printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n", | |
4211 | (int) brdp, (int) panelp, (int) portp); | |
4212 | #endif | |
4213 | ||
4214 | if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || | |
4215 | (portp == (stlport_t *) NULL)) | |
4216 | return; | |
4217 | ||
4218 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); | |
4219 | portp->uartaddr = (portp->portnr & 0x07) << 4; | |
4220 | portp->pagenr = panelp->pagenr; | |
4221 | portp->hwid = 0x1; | |
4222 | ||
4223 | BRDENABLE(portp->brdnr, portp->pagenr); | |
4224 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); | |
4225 | BRDDISABLE(portp->brdnr); | |
4226 | } | |
4227 | ||
4228 | /*****************************************************************************/ | |
4229 | ||
4230 | /* | |
4231 | * Set up the sc26198 registers for a port based on the termios port | |
4232 | * settings. | |
4233 | */ | |
4234 | ||
4235 | static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp) | |
4236 | { | |
4237 | stlbrd_t *brdp; | |
4238 | unsigned long flags; | |
4239 | unsigned int baudrate; | |
4240 | unsigned char mr0, mr1, mr2, clk; | |
4241 | unsigned char imron, imroff, iopr, ipr; | |
4242 | ||
4243 | mr0 = 0; | |
4244 | mr1 = 0; | |
4245 | mr2 = 0; | |
4246 | clk = 0; | |
4247 | iopr = 0; | |
4248 | imron = 0; | |
4249 | imroff = 0; | |
4250 | ||
4251 | brdp = stl_brds[portp->brdnr]; | |
4252 | if (brdp == (stlbrd_t *) NULL) | |
4253 | return; | |
4254 | ||
4255 | /* | |
4256 | * Set up the RX char ignore mask with those RX error types we | |
4257 | * can ignore. | |
4258 | */ | |
4259 | portp->rxignoremsk = 0; | |
4260 | if (tiosp->c_iflag & IGNPAR) | |
4261 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | | |
4262 | SR_RXOVERRUN); | |
4263 | if (tiosp->c_iflag & IGNBRK) | |
4264 | portp->rxignoremsk |= SR_RXBREAK; | |
4265 | ||
4266 | portp->rxmarkmsk = SR_RXOVERRUN; | |
4267 | if (tiosp->c_iflag & (INPCK | PARMRK)) | |
4268 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); | |
4269 | if (tiosp->c_iflag & BRKINT) | |
4270 | portp->rxmarkmsk |= SR_RXBREAK; | |
4271 | ||
4272 | /* | |
4273 | * Go through the char size, parity and stop bits and set all the | |
4274 | * option register appropriately. | |
4275 | */ | |
4276 | switch (tiosp->c_cflag & CSIZE) { | |
4277 | case CS5: | |
4278 | mr1 |= MR1_CS5; | |
4279 | break; | |
4280 | case CS6: | |
4281 | mr1 |= MR1_CS6; | |
4282 | break; | |
4283 | case CS7: | |
4284 | mr1 |= MR1_CS7; | |
4285 | break; | |
4286 | default: | |
4287 | mr1 |= MR1_CS8; | |
4288 | break; | |
4289 | } | |
4290 | ||
4291 | if (tiosp->c_cflag & CSTOPB) | |
4292 | mr2 |= MR2_STOP2; | |
4293 | else | |
4294 | mr2 |= MR2_STOP1; | |
4295 | ||
4296 | if (tiosp->c_cflag & PARENB) { | |
4297 | if (tiosp->c_cflag & PARODD) | |
4298 | mr1 |= (MR1_PARENB | MR1_PARODD); | |
4299 | else | |
4300 | mr1 |= (MR1_PARENB | MR1_PAREVEN); | |
4301 | } else { | |
4302 | mr1 |= MR1_PARNONE; | |
4303 | } | |
4304 | ||
4305 | mr1 |= MR1_ERRBLOCK; | |
4306 | ||
4307 | /* | |
4308 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing | |
4309 | * space for hardware flow control and the like. This should be set to | |
4310 | * VMIN. | |
4311 | */ | |
4312 | mr2 |= MR2_RXFIFOHALF; | |
4313 | ||
4314 | /* | |
4315 | * Calculate the baud rate timers. For now we will just assume that | |
4316 | * the input and output baud are the same. The sc26198 has a fixed | |
4317 | * baud rate table, so only discrete baud rates possible. | |
4318 | */ | |
4319 | baudrate = tiosp->c_cflag & CBAUD; | |
4320 | if (baudrate & CBAUDEX) { | |
4321 | baudrate &= ~CBAUDEX; | |
4322 | if ((baudrate < 1) || (baudrate > 4)) | |
4323 | tiosp->c_cflag &= ~CBAUDEX; | |
4324 | else | |
4325 | baudrate += 15; | |
4326 | } | |
4327 | baudrate = stl_baudrates[baudrate]; | |
4328 | if ((tiosp->c_cflag & CBAUD) == B38400) { | |
4329 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
4330 | baudrate = 57600; | |
4331 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
4332 | baudrate = 115200; | |
4333 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) | |
4334 | baudrate = 230400; | |
4335 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
4336 | baudrate = 460800; | |
4337 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) | |
4338 | baudrate = (portp->baud_base / portp->custom_divisor); | |
4339 | } | |
4340 | if (baudrate > STL_SC26198MAXBAUD) | |
4341 | baudrate = STL_SC26198MAXBAUD; | |
4342 | ||
4343 | if (baudrate > 0) { | |
4344 | for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { | |
4345 | if (baudrate <= sc26198_baudtable[clk]) | |
4346 | break; | |
4347 | } | |
4348 | } | |
4349 | ||
4350 | /* | |
4351 | * Check what form of modem signaling is required and set it up. | |
4352 | */ | |
4353 | if (tiosp->c_cflag & CLOCAL) { | |
4354 | portp->flags &= ~ASYNC_CHECK_CD; | |
4355 | } else { | |
4356 | iopr |= IOPR_DCDCOS; | |
4357 | imron |= IR_IOPORT; | |
4358 | portp->flags |= ASYNC_CHECK_CD; | |
4359 | } | |
4360 | ||
4361 | /* | |
4362 | * Setup sc26198 enhanced modes if we can. In particular we want to | |
4363 | * handle as much of the flow control as possible automatically. As | |
4364 | * well as saving a few CPU cycles it will also greatly improve flow | |
4365 | * control reliability. | |
4366 | */ | |
4367 | if (tiosp->c_iflag & IXON) { | |
4368 | mr0 |= MR0_SWFTX | MR0_SWFT; | |
4369 | imron |= IR_XONXOFF; | |
4370 | } else { | |
4371 | imroff |= IR_XONXOFF; | |
4372 | } | |
4373 | if (tiosp->c_iflag & IXOFF) | |
4374 | mr0 |= MR0_SWFRX; | |
4375 | ||
4376 | if (tiosp->c_cflag & CRTSCTS) { | |
4377 | mr2 |= MR2_AUTOCTS; | |
4378 | mr1 |= MR1_AUTORTS; | |
4379 | } | |
4380 | ||
4381 | /* | |
4382 | * All sc26198 register values calculated so go through and set | |
4383 | * them all up. | |
4384 | */ | |
4385 | ||
4386 | #ifdef DEBUG | |
4387 | printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", | |
4388 | portp->portnr, portp->panelnr, portp->brdnr); | |
4389 | printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); | |
4390 | printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); | |
4391 | printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", | |
4392 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], | |
4393 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); | |
4394 | #endif | |
4395 | ||
b65b5b59 | 4396 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4397 | BRDENABLE(portp->brdnr, portp->pagenr); |
4398 | stl_sc26198setreg(portp, IMR, 0); | |
4399 | stl_sc26198updatereg(portp, MR0, mr0); | |
4400 | stl_sc26198updatereg(portp, MR1, mr1); | |
4401 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); | |
4402 | stl_sc26198updatereg(portp, MR2, mr2); | |
4403 | stl_sc26198updatereg(portp, IOPIOR, | |
4404 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); | |
4405 | ||
4406 | if (baudrate > 0) { | |
4407 | stl_sc26198setreg(portp, TXCSR, clk); | |
4408 | stl_sc26198setreg(portp, RXCSR, clk); | |
4409 | } | |
4410 | ||
4411 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); | |
4412 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); | |
4413 | ||
4414 | ipr = stl_sc26198getreg(portp, IPR); | |
4415 | if (ipr & IPR_DCD) | |
4416 | portp->sigs &= ~TIOCM_CD; | |
4417 | else | |
4418 | portp->sigs |= TIOCM_CD; | |
4419 | ||
4420 | portp->imr = (portp->imr & ~imroff) | imron; | |
4421 | stl_sc26198setreg(portp, IMR, portp->imr); | |
4422 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4423 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4424 | } |
4425 | ||
4426 | /*****************************************************************************/ | |
4427 | ||
4428 | /* | |
4429 | * Set the state of the DTR and RTS signals. | |
4430 | */ | |
4431 | ||
4432 | static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts) | |
4433 | { | |
4434 | unsigned char iopioron, iopioroff; | |
4435 | unsigned long flags; | |
4436 | ||
4437 | #ifdef DEBUG | |
4438 | printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n", | |
4439 | (int) portp, dtr, rts); | |
4440 | #endif | |
4441 | ||
4442 | iopioron = 0; | |
4443 | iopioroff = 0; | |
4444 | if (dtr == 0) | |
4445 | iopioroff |= IPR_DTR; | |
4446 | else if (dtr > 0) | |
4447 | iopioron |= IPR_DTR; | |
4448 | if (rts == 0) | |
4449 | iopioroff |= IPR_RTS; | |
4450 | else if (rts > 0) | |
4451 | iopioron |= IPR_RTS; | |
4452 | ||
b65b5b59 | 4453 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4454 | BRDENABLE(portp->brdnr, portp->pagenr); |
4455 | stl_sc26198setreg(portp, IOPIOR, | |
4456 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); | |
4457 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4458 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4459 | } |
4460 | ||
4461 | /*****************************************************************************/ | |
4462 | ||
4463 | /* | |
4464 | * Return the state of the signals. | |
4465 | */ | |
4466 | ||
4467 | static int stl_sc26198getsignals(stlport_t *portp) | |
4468 | { | |
4469 | unsigned char ipr; | |
4470 | unsigned long flags; | |
4471 | int sigs; | |
4472 | ||
4473 | #ifdef DEBUG | |
4474 | printk("stl_sc26198getsignals(portp=%x)\n", (int) portp); | |
4475 | #endif | |
4476 | ||
b65b5b59 | 4477 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4478 | BRDENABLE(portp->brdnr, portp->pagenr); |
4479 | ipr = stl_sc26198getreg(portp, IPR); | |
4480 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4481 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4482 | |
4483 | sigs = 0; | |
4484 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; | |
4485 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; | |
4486 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; | |
4487 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; | |
4488 | sigs |= TIOCM_DSR; | |
014c2544 | 4489 | return sigs; |
1da177e4 LT |
4490 | } |
4491 | ||
4492 | /*****************************************************************************/ | |
4493 | ||
4494 | /* | |
4495 | * Enable/Disable the Transmitter and/or Receiver. | |
4496 | */ | |
4497 | ||
4498 | static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx) | |
4499 | { | |
4500 | unsigned char ccr; | |
4501 | unsigned long flags; | |
4502 | ||
4503 | #ifdef DEBUG | |
4504 | printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n", | |
4505 | (int) portp, rx, tx); | |
4506 | #endif | |
4507 | ||
4508 | ccr = portp->crenable; | |
4509 | if (tx == 0) | |
4510 | ccr &= ~CR_TXENABLE; | |
4511 | else if (tx > 0) | |
4512 | ccr |= CR_TXENABLE; | |
4513 | if (rx == 0) | |
4514 | ccr &= ~CR_RXENABLE; | |
4515 | else if (rx > 0) | |
4516 | ccr |= CR_RXENABLE; | |
4517 | ||
b65b5b59 | 4518 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4519 | BRDENABLE(portp->brdnr, portp->pagenr); |
4520 | stl_sc26198setreg(portp, SCCR, ccr); | |
4521 | BRDDISABLE(portp->brdnr); | |
4522 | portp->crenable = ccr; | |
b65b5b59 | 4523 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4524 | } |
4525 | ||
4526 | /*****************************************************************************/ | |
4527 | ||
4528 | /* | |
4529 | * Start/stop the Transmitter and/or Receiver. | |
4530 | */ | |
4531 | ||
4532 | static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx) | |
4533 | { | |
4534 | unsigned char imr; | |
4535 | unsigned long flags; | |
4536 | ||
4537 | #ifdef DEBUG | |
4538 | printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n", | |
4539 | (int) portp, rx, tx); | |
4540 | #endif | |
4541 | ||
4542 | imr = portp->imr; | |
4543 | if (tx == 0) | |
4544 | imr &= ~IR_TXRDY; | |
4545 | else if (tx == 1) | |
4546 | imr |= IR_TXRDY; | |
4547 | if (rx == 0) | |
4548 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); | |
4549 | else if (rx > 0) | |
4550 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; | |
4551 | ||
b65b5b59 | 4552 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4553 | BRDENABLE(portp->brdnr, portp->pagenr); |
4554 | stl_sc26198setreg(portp, IMR, imr); | |
4555 | BRDDISABLE(portp->brdnr); | |
4556 | portp->imr = imr; | |
4557 | if (tx > 0) | |
4558 | set_bit(ASYI_TXBUSY, &portp->istate); | |
b65b5b59 | 4559 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4560 | } |
4561 | ||
4562 | /*****************************************************************************/ | |
4563 | ||
4564 | /* | |
4565 | * Disable all interrupts from this port. | |
4566 | */ | |
4567 | ||
4568 | static void stl_sc26198disableintrs(stlport_t *portp) | |
4569 | { | |
4570 | unsigned long flags; | |
4571 | ||
4572 | #ifdef DEBUG | |
4573 | printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp); | |
4574 | #endif | |
4575 | ||
b65b5b59 | 4576 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4577 | BRDENABLE(portp->brdnr, portp->pagenr); |
4578 | portp->imr = 0; | |
4579 | stl_sc26198setreg(portp, IMR, 0); | |
4580 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4581 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4582 | } |
4583 | ||
4584 | /*****************************************************************************/ | |
4585 | ||
4586 | static void stl_sc26198sendbreak(stlport_t *portp, int len) | |
4587 | { | |
4588 | unsigned long flags; | |
4589 | ||
4590 | #ifdef DEBUG | |
4591 | printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len); | |
4592 | #endif | |
4593 | ||
b65b5b59 | 4594 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4595 | BRDENABLE(portp->brdnr, portp->pagenr); |
4596 | if (len == 1) { | |
4597 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); | |
4598 | portp->stats.txbreaks++; | |
4599 | } else { | |
4600 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); | |
4601 | } | |
4602 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4603 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4604 | } |
4605 | ||
4606 | /*****************************************************************************/ | |
4607 | ||
4608 | /* | |
4609 | * Take flow control actions... | |
4610 | */ | |
4611 | ||
4612 | static void stl_sc26198flowctrl(stlport_t *portp, int state) | |
4613 | { | |
4614 | struct tty_struct *tty; | |
4615 | unsigned long flags; | |
4616 | unsigned char mr0; | |
4617 | ||
4618 | #ifdef DEBUG | |
4619 | printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state); | |
4620 | #endif | |
4621 | ||
4622 | if (portp == (stlport_t *) NULL) | |
4623 | return; | |
4624 | tty = portp->tty; | |
4625 | if (tty == (struct tty_struct *) NULL) | |
4626 | return; | |
4627 | ||
b65b5b59 | 4628 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4629 | BRDENABLE(portp->brdnr, portp->pagenr); |
4630 | ||
4631 | if (state) { | |
4632 | if (tty->termios->c_iflag & IXOFF) { | |
4633 | mr0 = stl_sc26198getreg(portp, MR0); | |
4634 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4635 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); | |
4636 | mr0 |= MR0_SWFRX; | |
4637 | portp->stats.rxxon++; | |
4638 | stl_sc26198wait(portp); | |
4639 | stl_sc26198setreg(portp, MR0, mr0); | |
4640 | } | |
4641 | /* | |
4642 | * Question: should we return RTS to what it was before? It may | |
4643 | * have been set by an ioctl... Suppose not, since if you have | |
4644 | * hardware flow control set then it is pretty silly to go and | |
4645 | * set the RTS line by hand. | |
4646 | */ | |
4647 | if (tty->termios->c_cflag & CRTSCTS) { | |
4648 | stl_sc26198setreg(portp, MR1, | |
4649 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); | |
4650 | stl_sc26198setreg(portp, IOPIOR, | |
4651 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); | |
4652 | portp->stats.rxrtson++; | |
4653 | } | |
4654 | } else { | |
4655 | if (tty->termios->c_iflag & IXOFF) { | |
4656 | mr0 = stl_sc26198getreg(portp, MR0); | |
4657 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4658 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); | |
4659 | mr0 &= ~MR0_SWFRX; | |
4660 | portp->stats.rxxoff++; | |
4661 | stl_sc26198wait(portp); | |
4662 | stl_sc26198setreg(portp, MR0, mr0); | |
4663 | } | |
4664 | if (tty->termios->c_cflag & CRTSCTS) { | |
4665 | stl_sc26198setreg(portp, MR1, | |
4666 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); | |
4667 | stl_sc26198setreg(portp, IOPIOR, | |
4668 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); | |
4669 | portp->stats.rxrtsoff++; | |
4670 | } | |
4671 | } | |
4672 | ||
4673 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4674 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4675 | } |
4676 | ||
4677 | /*****************************************************************************/ | |
4678 | ||
4679 | /* | |
4680 | * Send a flow control character. | |
4681 | */ | |
4682 | ||
4683 | static void stl_sc26198sendflow(stlport_t *portp, int state) | |
4684 | { | |
4685 | struct tty_struct *tty; | |
4686 | unsigned long flags; | |
4687 | unsigned char mr0; | |
4688 | ||
4689 | #ifdef DEBUG | |
4690 | printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state); | |
4691 | #endif | |
4692 | ||
4693 | if (portp == (stlport_t *) NULL) | |
4694 | return; | |
4695 | tty = portp->tty; | |
4696 | if (tty == (struct tty_struct *) NULL) | |
4697 | return; | |
4698 | ||
b65b5b59 | 4699 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4700 | BRDENABLE(portp->brdnr, portp->pagenr); |
4701 | if (state) { | |
4702 | mr0 = stl_sc26198getreg(portp, MR0); | |
4703 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4704 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); | |
4705 | mr0 |= MR0_SWFRX; | |
4706 | portp->stats.rxxon++; | |
4707 | stl_sc26198wait(portp); | |
4708 | stl_sc26198setreg(portp, MR0, mr0); | |
4709 | } else { | |
4710 | mr0 = stl_sc26198getreg(portp, MR0); | |
4711 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4712 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); | |
4713 | mr0 &= ~MR0_SWFRX; | |
4714 | portp->stats.rxxoff++; | |
4715 | stl_sc26198wait(portp); | |
4716 | stl_sc26198setreg(portp, MR0, mr0); | |
4717 | } | |
4718 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4719 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4720 | } |
4721 | ||
4722 | /*****************************************************************************/ | |
4723 | ||
4724 | static void stl_sc26198flush(stlport_t *portp) | |
4725 | { | |
4726 | unsigned long flags; | |
4727 | ||
4728 | #ifdef DEBUG | |
4729 | printk("stl_sc26198flush(portp=%x)\n", (int) portp); | |
4730 | #endif | |
4731 | ||
4732 | if (portp == (stlport_t *) NULL) | |
4733 | return; | |
4734 | ||
b65b5b59 | 4735 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4736 | BRDENABLE(portp->brdnr, portp->pagenr); |
4737 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); | |
4738 | stl_sc26198setreg(portp, SCCR, portp->crenable); | |
4739 | BRDDISABLE(portp->brdnr); | |
4740 | portp->tx.tail = portp->tx.head; | |
b65b5b59 | 4741 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4742 | } |
4743 | ||
4744 | /*****************************************************************************/ | |
4745 | ||
4746 | /* | |
4747 | * Return the current state of data flow on this port. This is only | |
4748 | * really interresting when determining if data has fully completed | |
4749 | * transmission or not... The sc26198 interrupt scheme cannot | |
4750 | * determine when all data has actually drained, so we need to | |
4751 | * check the port statusy register to be sure. | |
4752 | */ | |
4753 | ||
4754 | static int stl_sc26198datastate(stlport_t *portp) | |
4755 | { | |
4756 | unsigned long flags; | |
4757 | unsigned char sr; | |
4758 | ||
4759 | #ifdef DEBUG | |
4760 | printk("stl_sc26198datastate(portp=%x)\n", (int) portp); | |
4761 | #endif | |
4762 | ||
4763 | if (portp == (stlport_t *) NULL) | |
014c2544 | 4764 | return 0; |
1da177e4 | 4765 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
014c2544 | 4766 | return 1; |
1da177e4 | 4767 | |
b65b5b59 | 4768 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4769 | BRDENABLE(portp->brdnr, portp->pagenr); |
4770 | sr = stl_sc26198getreg(portp, SR); | |
4771 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4772 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 | 4773 | |
014c2544 | 4774 | return (sr & SR_TXEMPTY) ? 0 : 1; |
1da177e4 LT |
4775 | } |
4776 | ||
4777 | /*****************************************************************************/ | |
4778 | ||
4779 | /* | |
4780 | * Delay for a small amount of time, to give the sc26198 a chance | |
4781 | * to process a command... | |
4782 | */ | |
4783 | ||
4784 | static void stl_sc26198wait(stlport_t *portp) | |
4785 | { | |
4786 | int i; | |
4787 | ||
4788 | #ifdef DEBUG | |
4789 | printk("stl_sc26198wait(portp=%x)\n", (int) portp); | |
4790 | #endif | |
4791 | ||
4792 | if (portp == (stlport_t *) NULL) | |
4793 | return; | |
4794 | ||
4795 | for (i = 0; (i < 20); i++) | |
4796 | stl_sc26198getglobreg(portp, TSTR); | |
4797 | } | |
4798 | ||
4799 | /*****************************************************************************/ | |
4800 | ||
4801 | /* | |
4802 | * If we are TX flow controlled and in IXANY mode then we may | |
4803 | * need to unflow control here. We gotta do this because of the | |
4804 | * automatic flow control modes of the sc26198. | |
4805 | */ | |
4806 | ||
4807 | static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty) | |
4808 | { | |
4809 | unsigned char mr0; | |
4810 | ||
4811 | mr0 = stl_sc26198getreg(portp, MR0); | |
4812 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4813 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); | |
4814 | stl_sc26198wait(portp); | |
4815 | stl_sc26198setreg(portp, MR0, mr0); | |
4816 | clear_bit(ASYI_TXFLOWED, &portp->istate); | |
4817 | } | |
4818 | ||
4819 | /*****************************************************************************/ | |
4820 | ||
4821 | /* | |
4822 | * Interrupt service routine for sc26198 panels. | |
4823 | */ | |
4824 | ||
4825 | static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase) | |
4826 | { | |
4827 | stlport_t *portp; | |
4828 | unsigned int iack; | |
4829 | ||
b65b5b59 AC |
4830 | spin_lock(&brd_lock); |
4831 | ||
1da177e4 LT |
4832 | /* |
4833 | * Work around bug in sc26198 chip... Cannot have A6 address | |
4834 | * line of UART high, else iack will be returned as 0. | |
4835 | */ | |
4836 | outb(0, (iobase + 1)); | |
4837 | ||
4838 | iack = inb(iobase + XP_IACK); | |
4839 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; | |
4840 | ||
4841 | if (iack & IVR_RXDATA) | |
4842 | stl_sc26198rxisr(portp, iack); | |
4843 | else if (iack & IVR_TXDATA) | |
4844 | stl_sc26198txisr(portp); | |
4845 | else | |
4846 | stl_sc26198otherisr(portp, iack); | |
b65b5b59 AC |
4847 | |
4848 | spin_unlock(&brd_lock); | |
1da177e4 LT |
4849 | } |
4850 | ||
4851 | /*****************************************************************************/ | |
4852 | ||
4853 | /* | |
4854 | * Transmit interrupt handler. This has gotta be fast! Handling TX | |
4855 | * chars is pretty simple, stuff as many as possible from the TX buffer | |
4856 | * into the sc26198 FIFO. | |
4857 | * In practice it is possible that interrupts are enabled but that the | |
4858 | * port has been hung up. Need to handle not having any TX buffer here, | |
4859 | * this is done by using the side effect that head and tail will also | |
4860 | * be NULL if the buffer has been freed. | |
4861 | */ | |
4862 | ||
4863 | static void stl_sc26198txisr(stlport_t *portp) | |
4864 | { | |
4865 | unsigned int ioaddr; | |
4866 | unsigned char mr0; | |
4867 | int len, stlen; | |
4868 | char *head, *tail; | |
4869 | ||
4870 | #ifdef DEBUG | |
4871 | printk("stl_sc26198txisr(portp=%x)\n", (int) portp); | |
4872 | #endif | |
4873 | ||
4874 | ioaddr = portp->ioaddr; | |
4875 | head = portp->tx.head; | |
4876 | tail = portp->tx.tail; | |
4877 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
4878 | if ((len == 0) || ((len < STL_TXBUFLOW) && | |
4879 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { | |
4880 | set_bit(ASYI_TXLOW, &portp->istate); | |
4881 | schedule_work(&portp->tqueue); | |
4882 | } | |
4883 | ||
4884 | if (len == 0) { | |
4885 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); | |
4886 | mr0 = inb(ioaddr + XP_DATA); | |
4887 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { | |
4888 | portp->imr &= ~IR_TXRDY; | |
4889 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); | |
4890 | outb(portp->imr, (ioaddr + XP_DATA)); | |
4891 | clear_bit(ASYI_TXBUSY, &portp->istate); | |
4892 | } else { | |
4893 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); | |
4894 | outb(mr0, (ioaddr + XP_DATA)); | |
4895 | } | |
4896 | } else { | |
4897 | len = MIN(len, SC26198_TXFIFOSIZE); | |
4898 | portp->stats.txtotal += len; | |
4899 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); | |
4900 | outb(GTXFIFO, (ioaddr + XP_ADDR)); | |
4901 | outsb((ioaddr + XP_DATA), tail, stlen); | |
4902 | len -= stlen; | |
4903 | tail += stlen; | |
4904 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) | |
4905 | tail = portp->tx.buf; | |
4906 | if (len > 0) { | |
4907 | outsb((ioaddr + XP_DATA), tail, len); | |
4908 | tail += len; | |
4909 | } | |
4910 | portp->tx.tail = tail; | |
4911 | } | |
4912 | } | |
4913 | ||
4914 | /*****************************************************************************/ | |
4915 | ||
4916 | /* | |
4917 | * Receive character interrupt handler. Determine if we have good chars | |
4918 | * or bad chars and then process appropriately. Good chars are easy | |
4919 | * just shove the lot into the RX buffer and set all status byte to 0. | |
4920 | * If a bad RX char then process as required. This routine needs to be | |
4921 | * fast! In practice it is possible that we get an interrupt on a port | |
4922 | * that is closed. This can happen on hangups - since they completely | |
4923 | * shutdown a port not in user context. Need to handle this case. | |
4924 | */ | |
4925 | ||
4926 | static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack) | |
4927 | { | |
4928 | struct tty_struct *tty; | |
4929 | unsigned int len, buflen, ioaddr; | |
4930 | ||
4931 | #ifdef DEBUG | |
4932 | printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack); | |
4933 | #endif | |
4934 | ||
4935 | tty = portp->tty; | |
4936 | ioaddr = portp->ioaddr; | |
4937 | outb(GIBCR, (ioaddr + XP_ADDR)); | |
4938 | len = inb(ioaddr + XP_DATA) + 1; | |
4939 | ||
4940 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { | |
33f0f88f | 4941 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
1da177e4 LT |
4942 | len = MIN(len, sizeof(stl_unwanted)); |
4943 | outb(GRXFIFO, (ioaddr + XP_ADDR)); | |
4944 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); | |
4945 | portp->stats.rxlost += len; | |
4946 | portp->stats.rxtotal += len; | |
4947 | } else { | |
4948 | len = MIN(len, buflen); | |
4949 | if (len > 0) { | |
33f0f88f | 4950 | unsigned char *ptr; |
1da177e4 | 4951 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
33f0f88f AC |
4952 | tty_prepare_flip_string(tty, &ptr, len); |
4953 | insb((ioaddr + XP_DATA), ptr, len); | |
1da177e4 LT |
4954 | tty_schedule_flip(tty); |
4955 | portp->stats.rxtotal += len; | |
4956 | } | |
4957 | } | |
4958 | } else { | |
4959 | stl_sc26198rxbadchars(portp); | |
4960 | } | |
4961 | ||
4962 | /* | |
4963 | * If we are TX flow controlled and in IXANY mode then we may need | |
4964 | * to unflow control here. We gotta do this because of the automatic | |
4965 | * flow control modes of the sc26198. | |
4966 | */ | |
4967 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { | |
4968 | if ((tty != (struct tty_struct *) NULL) && | |
4969 | (tty->termios != (struct termios *) NULL) && | |
4970 | (tty->termios->c_iflag & IXANY)) { | |
4971 | stl_sc26198txunflow(portp, tty); | |
4972 | } | |
4973 | } | |
4974 | } | |
4975 | ||
4976 | /*****************************************************************************/ | |
4977 | ||
4978 | /* | |
4979 | * Process an RX bad character. | |
4980 | */ | |
4981 | ||
4982 | static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch) | |
4983 | { | |
4984 | struct tty_struct *tty; | |
4985 | unsigned int ioaddr; | |
4986 | ||
4987 | tty = portp->tty; | |
4988 | ioaddr = portp->ioaddr; | |
4989 | ||
4990 | if (status & SR_RXPARITY) | |
4991 | portp->stats.rxparity++; | |
4992 | if (status & SR_RXFRAMING) | |
4993 | portp->stats.rxframing++; | |
4994 | if (status & SR_RXOVERRUN) | |
4995 | portp->stats.rxoverrun++; | |
4996 | if (status & SR_RXBREAK) | |
4997 | portp->stats.rxbreaks++; | |
4998 | ||
4999 | if ((tty != (struct tty_struct *) NULL) && | |
5000 | ((portp->rxignoremsk & status) == 0)) { | |
5001 | if (portp->rxmarkmsk & status) { | |
5002 | if (status & SR_RXBREAK) { | |
5003 | status = TTY_BREAK; | |
5004 | if (portp->flags & ASYNC_SAK) { | |
5005 | do_SAK(tty); | |
5006 | BRDENABLE(portp->brdnr, portp->pagenr); | |
5007 | } | |
5008 | } else if (status & SR_RXPARITY) { | |
5009 | status = TTY_PARITY; | |
5010 | } else if (status & SR_RXFRAMING) { | |
5011 | status = TTY_FRAME; | |
5012 | } else if(status & SR_RXOVERRUN) { | |
5013 | status = TTY_OVERRUN; | |
5014 | } else { | |
5015 | status = 0; | |
5016 | } | |
5017 | } else { | |
5018 | status = 0; | |
5019 | } | |
5020 | ||
33f0f88f AC |
5021 | tty_insert_flip_char(tty, ch, status); |
5022 | tty_schedule_flip(tty); | |
1da177e4 LT |
5023 | |
5024 | if (status == 0) | |
5025 | portp->stats.rxtotal++; | |
5026 | } | |
5027 | } | |
5028 | ||
5029 | /*****************************************************************************/ | |
5030 | ||
5031 | /* | |
5032 | * Process all characters in the RX FIFO of the UART. Check all char | |
5033 | * status bytes as well, and process as required. We need to check | |
5034 | * all bytes in the FIFO, in case some more enter the FIFO while we | |
5035 | * are here. To get the exact character error type we need to switch | |
5036 | * into CHAR error mode (that is why we need to make sure we empty | |
5037 | * the FIFO). | |
5038 | */ | |
5039 | ||
5040 | static void stl_sc26198rxbadchars(stlport_t *portp) | |
5041 | { | |
5042 | unsigned char status, mr1; | |
5043 | char ch; | |
5044 | ||
5045 | /* | |
5046 | * To get the precise error type for each character we must switch | |
5047 | * back into CHAR error mode. | |
5048 | */ | |
5049 | mr1 = stl_sc26198getreg(portp, MR1); | |
5050 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); | |
5051 | ||
5052 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { | |
5053 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); | |
5054 | ch = stl_sc26198getreg(portp, RXFIFO); | |
5055 | stl_sc26198rxbadch(portp, status, ch); | |
5056 | } | |
5057 | ||
5058 | /* | |
5059 | * To get correct interrupt class we must switch back into BLOCK | |
5060 | * error mode. | |
5061 | */ | |
5062 | stl_sc26198setreg(portp, MR1, mr1); | |
5063 | } | |
5064 | ||
5065 | /*****************************************************************************/ | |
5066 | ||
5067 | /* | |
5068 | * Other interrupt handler. This includes modem signals, flow | |
5069 | * control actions, etc. Most stuff is left to off-level interrupt | |
5070 | * processing time. | |
5071 | */ | |
5072 | ||
5073 | static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack) | |
5074 | { | |
5075 | unsigned char cir, ipr, xisr; | |
5076 | ||
5077 | #ifdef DEBUG | |
5078 | printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack); | |
5079 | #endif | |
5080 | ||
5081 | cir = stl_sc26198getglobreg(portp, CIR); | |
5082 | ||
5083 | switch (cir & CIR_SUBTYPEMASK) { | |
5084 | case CIR_SUBCOS: | |
5085 | ipr = stl_sc26198getreg(portp, IPR); | |
5086 | if (ipr & IPR_DCDCHANGE) { | |
5087 | set_bit(ASYI_DCDCHANGE, &portp->istate); | |
5088 | schedule_work(&portp->tqueue); | |
5089 | portp->stats.modem++; | |
5090 | } | |
5091 | break; | |
5092 | case CIR_SUBXONXOFF: | |
5093 | xisr = stl_sc26198getreg(portp, XISR); | |
5094 | if (xisr & XISR_RXXONGOT) { | |
5095 | set_bit(ASYI_TXFLOWED, &portp->istate); | |
5096 | portp->stats.txxoff++; | |
5097 | } | |
5098 | if (xisr & XISR_RXXOFFGOT) { | |
5099 | clear_bit(ASYI_TXFLOWED, &portp->istate); | |
5100 | portp->stats.txxon++; | |
5101 | } | |
5102 | break; | |
5103 | case CIR_SUBBREAK: | |
5104 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); | |
5105 | stl_sc26198rxbadchars(portp); | |
5106 | break; | |
5107 | default: | |
5108 | break; | |
5109 | } | |
5110 | } | |
5111 | ||
5112 | /*****************************************************************************/ |