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