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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * stallion.c -- stallion multiport serial driver. | |
5 | * | |
6 | * Copyright (C) 1996-1999 Stallion Technologies | |
7 | * Copyright (C) 1994-1996 Greg Ungerer. | |
8 | * | |
9 | * This code is loosely based on the Linux serial driver, written by | |
10 | * Linus Torvalds, Theodore T'so and others. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | */ | |
26 | ||
27 | /*****************************************************************************/ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/slab.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/tty.h> | |
33 | #include <linux/tty_flip.h> | |
34 | #include <linux/serial.h> | |
35 | #include <linux/cd1400.h> | |
36 | #include <linux/sc26198.h> | |
37 | #include <linux/comstats.h> | |
38 | #include <linux/stallion.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/smp_lock.h> | |
1da177e4 LT |
42 | #include <linux/device.h> |
43 | #include <linux/delay.h> | |
44 | ||
45 | #include <asm/io.h> | |
46 | #include <asm/uaccess.h> | |
47 | ||
48 | #ifdef CONFIG_PCI | |
49 | #include <linux/pci.h> | |
50 | #endif | |
51 | ||
52 | /*****************************************************************************/ | |
53 | ||
54 | /* | |
55 | * Define different board types. Use the standard Stallion "assigned" | |
56 | * board numbers. Boards supported in this driver are abbreviated as | |
57 | * EIO = EasyIO and ECH = EasyConnection 8/32. | |
58 | */ | |
59 | #define BRD_EASYIO 20 | |
60 | #define BRD_ECH 21 | |
61 | #define BRD_ECHMC 22 | |
62 | #define BRD_ECHPCI 26 | |
63 | #define BRD_ECH64PCI 27 | |
64 | #define BRD_EASYIOPCI 28 | |
65 | ||
66 | /* | |
67 | * Define a configuration structure to hold the board configuration. | |
68 | * Need to set this up in the code (for now) with the boards that are | |
69 | * to be configured into the system. This is what needs to be modified | |
70 | * when adding/removing/modifying boards. Each line entry in the | |
71 | * stl_brdconf[] array is a board. Each line contains io/irq/memory | |
72 | * ranges for that board (as well as what type of board it is). | |
73 | * Some examples: | |
74 | * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, | |
75 | * This line would configure an EasyIO board (4 or 8, no difference), | |
76 | * at io address 2a0 and irq 10. | |
77 | * Another example: | |
78 | * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, | |
79 | * This line will configure an EasyConnection 8/32 board at primary io | |
80 | * address 2a8, secondary io address 280 and irq 12. | |
81 | * Enter as many lines into this array as you want (only the first 4 | |
82 | * will actually be used!). Any combination of EasyIO and EasyConnection | |
83 | * boards can be specified. EasyConnection 8/32 boards can share their | |
84 | * secondary io addresses between each other. | |
85 | * | |
86 | * NOTE: there is no need to put any entries in this table for PCI | |
87 | * boards. They will be found automatically by the driver - provided | |
88 | * PCI BIOS32 support is compiled into the kernel. | |
89 | */ | |
90 | ||
ca7ed0f2 | 91 | static struct stlconf { |
1da177e4 LT |
92 | int brdtype; |
93 | int ioaddr1; | |
94 | int ioaddr2; | |
95 | unsigned long memaddr; | |
96 | int irq; | |
97 | int irqtype; | |
ca7ed0f2 | 98 | } stl_brdconf[] = { |
1da177e4 LT |
99 | /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/ |
100 | }; | |
101 | ||
fe971071 | 102 | static int stl_nrbrds = ARRAY_SIZE(stl_brdconf); |
1da177e4 LT |
103 | |
104 | /*****************************************************************************/ | |
105 | ||
106 | /* | |
107 | * Define some important driver characteristics. Device major numbers | |
108 | * allocated as per Linux Device Registry. | |
109 | */ | |
110 | #ifndef STL_SIOMEMMAJOR | |
111 | #define STL_SIOMEMMAJOR 28 | |
112 | #endif | |
113 | #ifndef STL_SERIALMAJOR | |
114 | #define STL_SERIALMAJOR 24 | |
115 | #endif | |
116 | #ifndef STL_CALLOUTMAJOR | |
117 | #define STL_CALLOUTMAJOR 25 | |
118 | #endif | |
119 | ||
120 | /* | |
121 | * Set the TX buffer size. Bigger is better, but we don't want | |
122 | * to chew too much memory with buffers! | |
123 | */ | |
124 | #define STL_TXBUFLOW 512 | |
125 | #define STL_TXBUFSIZE 4096 | |
126 | ||
127 | /*****************************************************************************/ | |
128 | ||
129 | /* | |
130 | * Define our local driver identity first. Set up stuff to deal with | |
131 | * all the local structures required by a serial tty driver. | |
132 | */ | |
133 | static char *stl_drvtitle = "Stallion Multiport Serial Driver"; | |
134 | static char *stl_drvname = "stallion"; | |
135 | static char *stl_drvversion = "5.6.0"; | |
136 | ||
137 | static struct tty_driver *stl_serial; | |
138 | ||
1da177e4 LT |
139 | /* |
140 | * Define a local default termios struct. All ports will be created | |
141 | * with this termios initially. Basically all it defines is a raw port | |
142 | * at 9600, 8 data bits, 1 stop bit. | |
143 | */ | |
606d099c | 144 | static struct ktermios stl_deftermios = { |
1da177e4 LT |
145 | .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), |
146 | .c_cc = INIT_C_CC, | |
606d099c AC |
147 | .c_ispeed = 9600, |
148 | .c_ospeed = 9600, | |
1da177e4 LT |
149 | }; |
150 | ||
151 | /* | |
152 | * Define global stats structures. Not used often, and can be | |
153 | * re-used for each stats call. | |
154 | */ | |
155 | static comstats_t stl_comstats; | |
156 | static combrd_t stl_brdstats; | |
ca7ed0f2 JS |
157 | static struct stlbrd stl_dummybrd; |
158 | static struct stlport stl_dummyport; | |
1da177e4 LT |
159 | |
160 | /* | |
161 | * Define global place to put buffer overflow characters. | |
162 | */ | |
163 | static char stl_unwanted[SC26198_RXFIFOSIZE]; | |
164 | ||
165 | /*****************************************************************************/ | |
166 | ||
ca7ed0f2 | 167 | static struct stlbrd *stl_brds[STL_MAXBRDS]; |
1da177e4 LT |
168 | |
169 | /* | |
170 | * Per board state flags. Used with the state field of the board struct. | |
171 | * Not really much here! | |
172 | */ | |
173 | #define BRD_FOUND 0x1 | |
174 | ||
175 | /* | |
176 | * Define the port structure istate flags. These set of flags are | |
177 | * modified at interrupt time - so setting and reseting them needs | |
178 | * to be atomic. Use the bit clear/setting routines for this. | |
179 | */ | |
180 | #define ASYI_TXBUSY 1 | |
181 | #define ASYI_TXLOW 2 | |
182 | #define ASYI_DCDCHANGE 3 | |
183 | #define ASYI_TXFLOWED 4 | |
184 | ||
185 | /* | |
186 | * Define an array of board names as printable strings. Handy for | |
187 | * referencing boards when printing trace and stuff. | |
188 | */ | |
189 | static char *stl_brdnames[] = { | |
615e4a71 JS |
190 | NULL, |
191 | NULL, | |
192 | NULL, | |
193 | NULL, | |
194 | NULL, | |
195 | NULL, | |
196 | NULL, | |
197 | NULL, | |
198 | NULL, | |
199 | NULL, | |
200 | NULL, | |
201 | NULL, | |
202 | NULL, | |
203 | NULL, | |
204 | NULL, | |
205 | NULL, | |
206 | NULL, | |
207 | NULL, | |
208 | NULL, | |
209 | NULL, | |
1da177e4 LT |
210 | "EasyIO", |
211 | "EC8/32-AT", | |
212 | "EC8/32-MC", | |
615e4a71 JS |
213 | NULL, |
214 | NULL, | |
215 | NULL, | |
1da177e4 LT |
216 | "EC8/32-PCI", |
217 | "EC8/64-PCI", | |
218 | "EasyIO-PCI", | |
219 | }; | |
220 | ||
221 | /*****************************************************************************/ | |
222 | ||
223 | /* | |
224 | * Define some string labels for arguments passed from the module | |
225 | * load line. These allow for easy board definitions, and easy | |
226 | * modification of the io, memory and irq resoucres. | |
227 | */ | |
228 | static int stl_nargs = 0; | |
229 | static char *board0[4]; | |
230 | static char *board1[4]; | |
231 | static char *board2[4]; | |
232 | static char *board3[4]; | |
233 | ||
234 | static char **stl_brdsp[] = { | |
235 | (char **) &board0, | |
236 | (char **) &board1, | |
237 | (char **) &board2, | |
238 | (char **) &board3 | |
239 | }; | |
240 | ||
241 | /* | |
242 | * Define a set of common board names, and types. This is used to | |
243 | * parse any module arguments. | |
244 | */ | |
245 | ||
ca7ed0f2 | 246 | static struct { |
1da177e4 LT |
247 | char *name; |
248 | int type; | |
ca7ed0f2 | 249 | } stl_brdstr[] = { |
1da177e4 LT |
250 | { "easyio", BRD_EASYIO }, |
251 | { "eio", BRD_EASYIO }, | |
252 | { "20", BRD_EASYIO }, | |
253 | { "ec8/32", BRD_ECH }, | |
254 | { "ec8/32-at", BRD_ECH }, | |
255 | { "ec8/32-isa", BRD_ECH }, | |
256 | { "ech", BRD_ECH }, | |
257 | { "echat", BRD_ECH }, | |
258 | { "21", BRD_ECH }, | |
259 | { "ec8/32-mc", BRD_ECHMC }, | |
260 | { "ec8/32-mca", BRD_ECHMC }, | |
261 | { "echmc", BRD_ECHMC }, | |
262 | { "echmca", BRD_ECHMC }, | |
263 | { "22", BRD_ECHMC }, | |
264 | { "ec8/32-pc", BRD_ECHPCI }, | |
265 | { "ec8/32-pci", BRD_ECHPCI }, | |
266 | { "26", BRD_ECHPCI }, | |
267 | { "ec8/64-pc", BRD_ECH64PCI }, | |
268 | { "ec8/64-pci", BRD_ECH64PCI }, | |
269 | { "ech-pci", BRD_ECH64PCI }, | |
270 | { "echpci", BRD_ECH64PCI }, | |
271 | { "echpc", BRD_ECH64PCI }, | |
272 | { "27", BRD_ECH64PCI }, | |
273 | { "easyio-pc", BRD_EASYIOPCI }, | |
274 | { "easyio-pci", BRD_EASYIOPCI }, | |
275 | { "eio-pci", BRD_EASYIOPCI }, | |
276 | { "eiopci", BRD_EASYIOPCI }, | |
277 | { "28", BRD_EASYIOPCI }, | |
278 | }; | |
279 | ||
280 | /* | |
281 | * Define the module agruments. | |
282 | */ | |
1da177e4 LT |
283 | |
284 | module_param_array(board0, charp, &stl_nargs, 0); | |
285 | MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
286 | module_param_array(board1, charp, &stl_nargs, 0); | |
287 | MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
288 | module_param_array(board2, charp, &stl_nargs, 0); | |
289 | MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
290 | module_param_array(board3, charp, &stl_nargs, 0); | |
291 | MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
292 | ||
293 | /*****************************************************************************/ | |
294 | ||
295 | /* | |
296 | * Hardware ID bits for the EasyIO and ECH boards. These defines apply | |
297 | * to the directly accessible io ports of these boards (not the uarts - | |
298 | * they are in cd1400.h and sc26198.h). | |
299 | */ | |
300 | #define EIO_8PORTRS 0x04 | |
301 | #define EIO_4PORTRS 0x05 | |
302 | #define EIO_8PORTDI 0x00 | |
303 | #define EIO_8PORTM 0x06 | |
304 | #define EIO_MK3 0x03 | |
305 | #define EIO_IDBITMASK 0x07 | |
306 | ||
307 | #define EIO_BRDMASK 0xf0 | |
308 | #define ID_BRD4 0x10 | |
309 | #define ID_BRD8 0x20 | |
310 | #define ID_BRD16 0x30 | |
311 | ||
312 | #define EIO_INTRPEND 0x08 | |
313 | #define EIO_INTEDGE 0x00 | |
314 | #define EIO_INTLEVEL 0x08 | |
315 | #define EIO_0WS 0x10 | |
316 | ||
317 | #define ECH_ID 0xa0 | |
318 | #define ECH_IDBITMASK 0xe0 | |
319 | #define ECH_BRDENABLE 0x08 | |
320 | #define ECH_BRDDISABLE 0x00 | |
321 | #define ECH_INTENABLE 0x01 | |
322 | #define ECH_INTDISABLE 0x00 | |
323 | #define ECH_INTLEVEL 0x02 | |
324 | #define ECH_INTEDGE 0x00 | |
325 | #define ECH_INTRPEND 0x01 | |
326 | #define ECH_BRDRESET 0x01 | |
327 | ||
328 | #define ECHMC_INTENABLE 0x01 | |
329 | #define ECHMC_BRDRESET 0x02 | |
330 | ||
331 | #define ECH_PNLSTATUS 2 | |
332 | #define ECH_PNL16PORT 0x20 | |
333 | #define ECH_PNLIDMASK 0x07 | |
334 | #define ECH_PNLXPID 0x40 | |
335 | #define ECH_PNLINTRPEND 0x80 | |
336 | ||
337 | #define ECH_ADDR2MASK 0x1e0 | |
338 | ||
339 | /* | |
340 | * Define the vector mapping bits for the programmable interrupt board | |
341 | * hardware. These bits encode the interrupt for the board to use - it | |
342 | * is software selectable (except the EIO-8M). | |
343 | */ | |
344 | static unsigned char stl_vecmap[] = { | |
345 | 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, | |
346 | 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 | |
347 | }; | |
348 | ||
b65b5b59 AC |
349 | /* |
350 | * Lock ordering is that you may not take stallion_lock holding | |
351 | * brd_lock. | |
352 | */ | |
353 | ||
354 | static spinlock_t brd_lock; /* Guard the board mapping */ | |
355 | static spinlock_t stallion_lock; /* Guard the tty driver */ | |
356 | ||
1da177e4 LT |
357 | /* |
358 | * Set up enable and disable macros for the ECH boards. They require | |
359 | * the secondary io address space to be activated and deactivated. | |
360 | * This way all ECH boards can share their secondary io region. | |
361 | * If this is an ECH-PCI board then also need to set the page pointer | |
362 | * to point to the correct page. | |
363 | */ | |
364 | #define BRDENABLE(brdnr,pagenr) \ | |
365 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ | |
366 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ | |
367 | stl_brds[(brdnr)]->ioctrl); \ | |
368 | else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ | |
369 | outb((pagenr), stl_brds[(brdnr)]->ioctrl); | |
370 | ||
371 | #define BRDDISABLE(brdnr) \ | |
372 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ | |
373 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ | |
374 | stl_brds[(brdnr)]->ioctrl); | |
375 | ||
376 | #define STL_CD1400MAXBAUD 230400 | |
377 | #define STL_SC26198MAXBAUD 460800 | |
378 | ||
379 | #define STL_BAUDBASE 115200 | |
380 | #define STL_CLOSEDELAY (5 * HZ / 10) | |
381 | ||
382 | /*****************************************************************************/ | |
383 | ||
1da177e4 LT |
384 | /* |
385 | * Define the Stallion PCI vendor and device IDs. | |
386 | */ | |
387 | #ifndef PCI_VENDOR_ID_STALLION | |
388 | #define PCI_VENDOR_ID_STALLION 0x124d | |
389 | #endif | |
390 | #ifndef PCI_DEVICE_ID_ECHPCI832 | |
391 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 | |
392 | #endif | |
393 | #ifndef PCI_DEVICE_ID_ECHPCI864 | |
394 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 | |
395 | #endif | |
396 | #ifndef PCI_DEVICE_ID_EIOPCI | |
397 | #define PCI_DEVICE_ID_EIOPCI 0x0003 | |
398 | #endif | |
399 | ||
400 | /* | |
401 | * Define structure to hold all Stallion PCI boards. | |
402 | */ | |
1da177e4 | 403 | |
b1b84fe0 JS |
404 | static struct pci_device_id stl_pcibrds[] = { |
405 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864), | |
406 | .driver_data = BRD_ECH64PCI }, | |
407 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI), | |
408 | .driver_data = BRD_EASYIOPCI }, | |
409 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832), | |
410 | .driver_data = BRD_ECHPCI }, | |
411 | { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410), | |
412 | .driver_data = BRD_ECHPCI }, | |
413 | { } | |
414 | }; | |
415 | MODULE_DEVICE_TABLE(pci, stl_pcibrds); | |
1da177e4 LT |
416 | |
417 | /*****************************************************************************/ | |
418 | ||
419 | /* | |
420 | * Define macros to extract a brd/port number from a minor number. | |
421 | */ | |
422 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) | |
423 | #define MINOR2PORT(min) ((min) & 0x3f) | |
424 | ||
425 | /* | |
426 | * Define a baud rate table that converts termios baud rate selector | |
427 | * into the actual baud rate value. All baud rate calculations are | |
428 | * based on the actual baud rate required. | |
429 | */ | |
430 | static unsigned int stl_baudrates[] = { | |
431 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
432 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 | |
433 | }; | |
434 | ||
435 | /* | |
436 | * Define some handy local macros... | |
437 | */ | |
438 | #undef MIN | |
439 | #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) | |
440 | ||
441 | #undef TOLOWER | |
442 | #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) | |
443 | ||
444 | /*****************************************************************************/ | |
445 | ||
446 | /* | |
447 | * Declare all those functions in this driver! | |
448 | */ | |
449 | ||
1da177e4 | 450 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); |
ca7ed0f2 | 451 | static int stl_brdinit(struct stlbrd *brdp); |
ca7ed0f2 JS |
452 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp); |
453 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp); | |
ca7ed0f2 | 454 | static int stl_waitcarrier(struct stlport *portp, struct file *filp); |
1da177e4 | 455 | |
1da177e4 LT |
456 | /* |
457 | * CD1400 uart specific handling functions. | |
458 | */ | |
ca7ed0f2 JS |
459 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value); |
460 | static int stl_cd1400getreg(struct stlport *portp, int regnr); | |
461 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value); | |
462 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp); | |
463 | static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); | |
606d099c | 464 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp); |
ca7ed0f2 JS |
465 | static int stl_cd1400getsignals(struct stlport *portp); |
466 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts); | |
467 | static void stl_cd1400ccrwait(struct stlport *portp); | |
468 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx); | |
469 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx); | |
470 | static void stl_cd1400disableintrs(struct stlport *portp); | |
471 | static void stl_cd1400sendbreak(struct stlport *portp, int len); | |
472 | static void stl_cd1400flowctrl(struct stlport *portp, int state); | |
473 | static void stl_cd1400sendflow(struct stlport *portp, int state); | |
474 | static void stl_cd1400flush(struct stlport *portp); | |
475 | static int stl_cd1400datastate(struct stlport *portp); | |
476 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase); | |
477 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase); | |
478 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr); | |
479 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr); | |
480 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr); | |
481 | ||
482 | static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr); | |
1da177e4 LT |
483 | |
484 | /* | |
485 | * SC26198 uart specific handling functions. | |
486 | */ | |
ca7ed0f2 JS |
487 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value); |
488 | static int stl_sc26198getreg(struct stlport *portp, int regnr); | |
489 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value); | |
490 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr); | |
491 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp); | |
492 | static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); | |
606d099c | 493 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp); |
ca7ed0f2 JS |
494 | static int stl_sc26198getsignals(struct stlport *portp); |
495 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts); | |
496 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx); | |
497 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx); | |
498 | static void stl_sc26198disableintrs(struct stlport *portp); | |
499 | static void stl_sc26198sendbreak(struct stlport *portp, int len); | |
500 | static void stl_sc26198flowctrl(struct stlport *portp, int state); | |
501 | static void stl_sc26198sendflow(struct stlport *portp, int state); | |
502 | static void stl_sc26198flush(struct stlport *portp); | |
503 | static int stl_sc26198datastate(struct stlport *portp); | |
504 | static void stl_sc26198wait(struct stlport *portp); | |
505 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty); | |
506 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase); | |
507 | static void stl_sc26198txisr(struct stlport *port); | |
508 | static void stl_sc26198rxisr(struct stlport *port, unsigned int iack); | |
509 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch); | |
510 | static void stl_sc26198rxbadchars(struct stlport *portp); | |
511 | static void stl_sc26198otherisr(struct stlport *port, unsigned int iack); | |
1da177e4 LT |
512 | |
513 | /*****************************************************************************/ | |
514 | ||
515 | /* | |
516 | * Generic UART support structure. | |
517 | */ | |
518 | typedef struct uart { | |
ca7ed0f2 JS |
519 | int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp); |
520 | void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); | |
606d099c | 521 | void (*setport)(struct stlport *portp, struct ktermios *tiosp); |
ca7ed0f2 JS |
522 | int (*getsignals)(struct stlport *portp); |
523 | void (*setsignals)(struct stlport *portp, int dtr, int rts); | |
524 | void (*enablerxtx)(struct stlport *portp, int rx, int tx); | |
525 | void (*startrxtx)(struct stlport *portp, int rx, int tx); | |
526 | void (*disableintrs)(struct stlport *portp); | |
527 | void (*sendbreak)(struct stlport *portp, int len); | |
528 | void (*flowctrl)(struct stlport *portp, int state); | |
529 | void (*sendflow)(struct stlport *portp, int state); | |
530 | void (*flush)(struct stlport *portp); | |
531 | int (*datastate)(struct stlport *portp); | |
532 | void (*intr)(struct stlpanel *panelp, unsigned int iobase); | |
1da177e4 LT |
533 | } uart_t; |
534 | ||
535 | /* | |
536 | * Define some macros to make calling these functions nice and clean. | |
537 | */ | |
538 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) | |
539 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) | |
540 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) | |
541 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) | |
542 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) | |
543 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) | |
544 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) | |
545 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) | |
546 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) | |
547 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) | |
548 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) | |
549 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) | |
550 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) | |
551 | ||
552 | /*****************************************************************************/ | |
553 | ||
554 | /* | |
555 | * CD1400 UART specific data initialization. | |
556 | */ | |
557 | static uart_t stl_cd1400uart = { | |
558 | stl_cd1400panelinit, | |
559 | stl_cd1400portinit, | |
560 | stl_cd1400setport, | |
561 | stl_cd1400getsignals, | |
562 | stl_cd1400setsignals, | |
563 | stl_cd1400enablerxtx, | |
564 | stl_cd1400startrxtx, | |
565 | stl_cd1400disableintrs, | |
566 | stl_cd1400sendbreak, | |
567 | stl_cd1400flowctrl, | |
568 | stl_cd1400sendflow, | |
569 | stl_cd1400flush, | |
570 | stl_cd1400datastate, | |
571 | stl_cd1400eiointr | |
572 | }; | |
573 | ||
574 | /* | |
575 | * Define the offsets within the register bank of a cd1400 based panel. | |
576 | * These io address offsets are common to the EasyIO board as well. | |
577 | */ | |
578 | #define EREG_ADDR 0 | |
579 | #define EREG_DATA 4 | |
580 | #define EREG_RXACK 5 | |
581 | #define EREG_TXACK 6 | |
582 | #define EREG_MDACK 7 | |
583 | ||
584 | #define EREG_BANKSIZE 8 | |
585 | ||
586 | #define CD1400_CLK 25000000 | |
587 | #define CD1400_CLK8M 20000000 | |
588 | ||
589 | /* | |
590 | * Define the cd1400 baud rate clocks. These are used when calculating | |
591 | * what clock and divisor to use for the required baud rate. Also | |
592 | * define the maximum baud rate allowed, and the default base baud. | |
593 | */ | |
594 | static int stl_cd1400clkdivs[] = { | |
595 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 | |
596 | }; | |
597 | ||
598 | /*****************************************************************************/ | |
599 | ||
600 | /* | |
601 | * SC26198 UART specific data initization. | |
602 | */ | |
603 | static uart_t stl_sc26198uart = { | |
604 | stl_sc26198panelinit, | |
605 | stl_sc26198portinit, | |
606 | stl_sc26198setport, | |
607 | stl_sc26198getsignals, | |
608 | stl_sc26198setsignals, | |
609 | stl_sc26198enablerxtx, | |
610 | stl_sc26198startrxtx, | |
611 | stl_sc26198disableintrs, | |
612 | stl_sc26198sendbreak, | |
613 | stl_sc26198flowctrl, | |
614 | stl_sc26198sendflow, | |
615 | stl_sc26198flush, | |
616 | stl_sc26198datastate, | |
617 | stl_sc26198intr | |
618 | }; | |
619 | ||
620 | /* | |
621 | * Define the offsets within the register bank of a sc26198 based panel. | |
622 | */ | |
623 | #define XP_DATA 0 | |
624 | #define XP_ADDR 1 | |
625 | #define XP_MODID 2 | |
626 | #define XP_STATUS 2 | |
627 | #define XP_IACK 3 | |
628 | ||
629 | #define XP_BANKSIZE 4 | |
630 | ||
631 | /* | |
632 | * Define the sc26198 baud rate table. Offsets within the table | |
633 | * represent the actual baud rate selector of sc26198 registers. | |
634 | */ | |
635 | static unsigned int sc26198_baudtable[] = { | |
636 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, | |
637 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, | |
638 | 230400, 460800, 921600 | |
639 | }; | |
640 | ||
fe971071 | 641 | #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable) |
1da177e4 LT |
642 | |
643 | /*****************************************************************************/ | |
644 | ||
645 | /* | |
646 | * Define the driver info for a user level control device. Used mainly | |
647 | * to get at port stats - only not using the port device itself. | |
648 | */ | |
62322d25 | 649 | static const struct file_operations stl_fsiomem = { |
1da177e4 LT |
650 | .owner = THIS_MODULE, |
651 | .ioctl = stl_memioctl, | |
652 | }; | |
653 | ||
ca8eca68 | 654 | static struct class *stallion_class; |
1da177e4 | 655 | |
1da177e4 LT |
656 | /* |
657 | * Check for any arguments passed in on the module load command line. | |
658 | */ | |
659 | ||
1da177e4 LT |
660 | /*****************************************************************************/ |
661 | ||
662 | /* | |
663 | * Convert an ascii string number into an unsigned long. | |
664 | */ | |
665 | ||
666 | static unsigned long stl_atol(char *str) | |
667 | { | |
668 | unsigned long val; | |
669 | int base, c; | |
670 | char *sp; | |
671 | ||
672 | val = 0; | |
673 | sp = str; | |
674 | if ((*sp == '0') && (*(sp+1) == 'x')) { | |
675 | base = 16; | |
676 | sp += 2; | |
677 | } else if (*sp == '0') { | |
678 | base = 8; | |
679 | sp++; | |
680 | } else { | |
681 | base = 10; | |
682 | } | |
683 | ||
684 | for (; (*sp != 0); sp++) { | |
685 | c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); | |
686 | if ((c < 0) || (c >= base)) { | |
687 | printk("STALLION: invalid argument %s\n", str); | |
688 | val = 0; | |
689 | break; | |
690 | } | |
691 | val = (val * base) + c; | |
692 | } | |
014c2544 | 693 | return val; |
1da177e4 LT |
694 | } |
695 | ||
696 | /*****************************************************************************/ | |
697 | ||
698 | /* | |
699 | * Parse the supplied argument string, into the board conf struct. | |
700 | */ | |
701 | ||
40e82652 | 702 | static int __init stl_parsebrd(struct stlconf *confp, char **argp) |
1da177e4 LT |
703 | { |
704 | char *sp; | |
fe971071 | 705 | int i; |
1da177e4 | 706 | |
a0564e14 | 707 | pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp); |
1da177e4 | 708 | |
615e4a71 | 709 | if ((argp[0] == NULL) || (*argp[0] == 0)) |
014c2544 | 710 | return 0; |
1da177e4 LT |
711 | |
712 | for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) | |
713 | *sp = TOLOWER(*sp); | |
714 | ||
fe971071 | 715 | for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) { |
1da177e4 LT |
716 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
717 | break; | |
718 | } | |
fe971071 | 719 | if (i == ARRAY_SIZE(stl_brdstr)) { |
1da177e4 | 720 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
fe971071 | 721 | return 0; |
1da177e4 LT |
722 | } |
723 | ||
724 | confp->brdtype = stl_brdstr[i].type; | |
725 | ||
726 | i = 1; | |
615e4a71 | 727 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
1da177e4 LT |
728 | confp->ioaddr1 = stl_atol(argp[i]); |
729 | i++; | |
730 | if (confp->brdtype == BRD_ECH) { | |
615e4a71 | 731 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
1da177e4 LT |
732 | confp->ioaddr2 = stl_atol(argp[i]); |
733 | i++; | |
734 | } | |
615e4a71 | 735 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
1da177e4 | 736 | confp->irq = stl_atol(argp[i]); |
014c2544 | 737 | return 1; |
1da177e4 LT |
738 | } |
739 | ||
740 | /*****************************************************************************/ | |
741 | ||
1da177e4 LT |
742 | /* |
743 | * Allocate a new board structure. Fill out the basic info in it. | |
744 | */ | |
745 | ||
ca7ed0f2 | 746 | static struct stlbrd *stl_allocbrd(void) |
1da177e4 | 747 | { |
ca7ed0f2 | 748 | struct stlbrd *brdp; |
1da177e4 | 749 | |
ca7ed0f2 | 750 | brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL); |
b0b4ed72 | 751 | if (!brdp) { |
b65b5b59 | 752 | printk("STALLION: failed to allocate memory (size=%Zd)\n", |
ca7ed0f2 | 753 | sizeof(struct stlbrd)); |
b0b4ed72 | 754 | return NULL; |
1da177e4 LT |
755 | } |
756 | ||
1da177e4 | 757 | brdp->magic = STL_BOARDMAGIC; |
014c2544 | 758 | return brdp; |
1da177e4 LT |
759 | } |
760 | ||
96b066b8 JS |
761 | static void __init stl_argbrds(void) |
762 | { | |
763 | struct stlconf conf; | |
764 | struct stlbrd *brdp; | |
765 | int i; | |
766 | ||
767 | pr_debug("stl_argbrds()\n"); | |
768 | ||
769 | for (i = stl_nrbrds; (i < stl_nargs); i++) { | |
770 | memset(&conf, 0, sizeof(conf)); | |
771 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) | |
772 | continue; | |
773 | if ((brdp = stl_allocbrd()) == NULL) | |
774 | continue; | |
775 | stl_nrbrds = i + 1; | |
776 | brdp->brdnr = i; | |
777 | brdp->brdtype = conf.brdtype; | |
778 | brdp->ioaddr1 = conf.ioaddr1; | |
779 | brdp->ioaddr2 = conf.ioaddr2; | |
780 | brdp->irq = conf.irq; | |
781 | brdp->irqtype = conf.irqtype; | |
782 | stl_brdinit(brdp); | |
783 | } | |
784 | } | |
785 | ||
1da177e4 LT |
786 | /*****************************************************************************/ |
787 | ||
788 | static int stl_open(struct tty_struct *tty, struct file *filp) | |
789 | { | |
ca7ed0f2 JS |
790 | struct stlport *portp; |
791 | struct stlbrd *brdp; | |
1da177e4 LT |
792 | unsigned int minordev; |
793 | int brdnr, panelnr, portnr, rc; | |
794 | ||
a0564e14 | 795 | pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name); |
1da177e4 LT |
796 | |
797 | minordev = tty->index; | |
798 | brdnr = MINOR2BRD(minordev); | |
799 | if (brdnr >= stl_nrbrds) | |
014c2544 | 800 | return -ENODEV; |
1da177e4 | 801 | brdp = stl_brds[brdnr]; |
615e4a71 | 802 | if (brdp == NULL) |
014c2544 | 803 | return -ENODEV; |
1da177e4 LT |
804 | minordev = MINOR2PORT(minordev); |
805 | for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { | |
615e4a71 | 806 | if (brdp->panels[panelnr] == NULL) |
1da177e4 LT |
807 | break; |
808 | if (minordev < brdp->panels[panelnr]->nrports) { | |
809 | portnr = minordev; | |
810 | break; | |
811 | } | |
812 | minordev -= brdp->panels[panelnr]->nrports; | |
813 | } | |
814 | if (portnr < 0) | |
014c2544 | 815 | return -ENODEV; |
1da177e4 LT |
816 | |
817 | portp = brdp->panels[panelnr]->ports[portnr]; | |
615e4a71 | 818 | if (portp == NULL) |
014c2544 | 819 | return -ENODEV; |
1da177e4 LT |
820 | |
821 | /* | |
822 | * On the first open of the device setup the port hardware, and | |
823 | * initialize the per port data structure. | |
824 | */ | |
825 | portp->tty = tty; | |
826 | tty->driver_data = portp; | |
827 | portp->refcount++; | |
828 | ||
829 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { | |
b0b4ed72 TK |
830 | if (!portp->tx.buf) { |
831 | portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); | |
832 | if (!portp->tx.buf) | |
014c2544 | 833 | return -ENOMEM; |
1da177e4 LT |
834 | portp->tx.head = portp->tx.buf; |
835 | portp->tx.tail = portp->tx.buf; | |
836 | } | |
837 | stl_setport(portp, tty->termios); | |
838 | portp->sigs = stl_getsignals(portp); | |
839 | stl_setsignals(portp, 1, 1); | |
840 | stl_enablerxtx(portp, 1, 1); | |
841 | stl_startrxtx(portp, 1, 0); | |
842 | clear_bit(TTY_IO_ERROR, &tty->flags); | |
843 | portp->flags |= ASYNC_INITIALIZED; | |
844 | } | |
845 | ||
846 | /* | |
847 | * Check if this port is in the middle of closing. If so then wait | |
848 | * until it is closed then return error status, based on flag settings. | |
849 | * The sleep here does not need interrupt protection since the wakeup | |
850 | * for it is done with the same context. | |
851 | */ | |
852 | if (portp->flags & ASYNC_CLOSING) { | |
853 | interruptible_sleep_on(&portp->close_wait); | |
854 | if (portp->flags & ASYNC_HUP_NOTIFY) | |
014c2544 JJ |
855 | return -EAGAIN; |
856 | return -ERESTARTSYS; | |
1da177e4 LT |
857 | } |
858 | ||
859 | /* | |
860 | * Based on type of open being done check if it can overlap with any | |
861 | * previous opens still in effect. If we are a normal serial device | |
862 | * then also we might have to wait for carrier. | |
863 | */ | |
864 | if (!(filp->f_flags & O_NONBLOCK)) { | |
865 | if ((rc = stl_waitcarrier(portp, filp)) != 0) | |
014c2544 | 866 | return rc; |
1da177e4 LT |
867 | } |
868 | portp->flags |= ASYNC_NORMAL_ACTIVE; | |
869 | ||
014c2544 | 870 | return 0; |
1da177e4 LT |
871 | } |
872 | ||
873 | /*****************************************************************************/ | |
874 | ||
875 | /* | |
876 | * Possibly need to wait for carrier (DCD signal) to come high. Say | |
877 | * maybe because if we are clocal then we don't need to wait... | |
878 | */ | |
879 | ||
ca7ed0f2 | 880 | static int stl_waitcarrier(struct stlport *portp, struct file *filp) |
1da177e4 LT |
881 | { |
882 | unsigned long flags; | |
883 | int rc, doclocal; | |
884 | ||
a0564e14 | 885 | pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp); |
1da177e4 LT |
886 | |
887 | rc = 0; | |
888 | doclocal = 0; | |
889 | ||
b65b5b59 AC |
890 | spin_lock_irqsave(&stallion_lock, flags); |
891 | ||
1da177e4 LT |
892 | if (portp->tty->termios->c_cflag & CLOCAL) |
893 | doclocal++; | |
894 | ||
1da177e4 LT |
895 | portp->openwaitcnt++; |
896 | if (! tty_hung_up_p(filp)) | |
897 | portp->refcount--; | |
898 | ||
899 | for (;;) { | |
b65b5b59 | 900 | /* Takes brd_lock internally */ |
1da177e4 LT |
901 | stl_setsignals(portp, 1, 1); |
902 | if (tty_hung_up_p(filp) || | |
903 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { | |
904 | if (portp->flags & ASYNC_HUP_NOTIFY) | |
905 | rc = -EBUSY; | |
906 | else | |
907 | rc = -ERESTARTSYS; | |
908 | break; | |
909 | } | |
910 | if (((portp->flags & ASYNC_CLOSING) == 0) && | |
911 | (doclocal || (portp->sigs & TIOCM_CD))) { | |
912 | break; | |
913 | } | |
914 | if (signal_pending(current)) { | |
915 | rc = -ERESTARTSYS; | |
916 | break; | |
917 | } | |
b65b5b59 | 918 | /* FIXME */ |
1da177e4 LT |
919 | interruptible_sleep_on(&portp->open_wait); |
920 | } | |
921 | ||
922 | if (! tty_hung_up_p(filp)) | |
923 | portp->refcount++; | |
924 | portp->openwaitcnt--; | |
b65b5b59 | 925 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 | 926 | |
014c2544 | 927 | return rc; |
1da177e4 LT |
928 | } |
929 | ||
930 | /*****************************************************************************/ | |
931 | ||
96b066b8 JS |
932 | static void stl_flushbuffer(struct tty_struct *tty) |
933 | { | |
934 | struct stlport *portp; | |
935 | ||
936 | pr_debug("stl_flushbuffer(tty=%p)\n", tty); | |
937 | ||
938 | if (tty == NULL) | |
939 | return; | |
940 | portp = tty->driver_data; | |
941 | if (portp == NULL) | |
942 | return; | |
943 | ||
944 | stl_flush(portp); | |
945 | tty_wakeup(tty); | |
946 | } | |
947 | ||
948 | /*****************************************************************************/ | |
949 | ||
950 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) | |
951 | { | |
952 | struct stlport *portp; | |
953 | unsigned long tend; | |
954 | ||
955 | pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout); | |
956 | ||
957 | if (tty == NULL) | |
958 | return; | |
959 | portp = tty->driver_data; | |
960 | if (portp == NULL) | |
961 | return; | |
962 | ||
963 | if (timeout == 0) | |
964 | timeout = HZ; | |
965 | tend = jiffies + timeout; | |
966 | ||
967 | while (stl_datastate(portp)) { | |
968 | if (signal_pending(current)) | |
969 | break; | |
970 | msleep_interruptible(20); | |
971 | if (time_after_eq(jiffies, tend)) | |
972 | break; | |
973 | } | |
974 | } | |
975 | ||
976 | /*****************************************************************************/ | |
977 | ||
1da177e4 LT |
978 | static void stl_close(struct tty_struct *tty, struct file *filp) |
979 | { | |
ca7ed0f2 | 980 | struct stlport *portp; |
1da177e4 LT |
981 | unsigned long flags; |
982 | ||
a0564e14 | 983 | pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp); |
1da177e4 LT |
984 | |
985 | portp = tty->driver_data; | |
615e4a71 | 986 | if (portp == NULL) |
1da177e4 LT |
987 | return; |
988 | ||
b65b5b59 | 989 | spin_lock_irqsave(&stallion_lock, flags); |
1da177e4 | 990 | if (tty_hung_up_p(filp)) { |
b65b5b59 | 991 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
992 | return; |
993 | } | |
994 | if ((tty->count == 1) && (portp->refcount != 1)) | |
995 | portp->refcount = 1; | |
996 | if (portp->refcount-- > 1) { | |
b65b5b59 | 997 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
998 | return; |
999 | } | |
1000 | ||
1001 | portp->refcount = 0; | |
1002 | portp->flags |= ASYNC_CLOSING; | |
1003 | ||
1004 | /* | |
1005 | * May want to wait for any data to drain before closing. The BUSY | |
1006 | * flag keeps track of whether we are still sending or not - it is | |
1007 | * very accurate for the cd1400, not quite so for the sc26198. | |
1008 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) | |
1009 | */ | |
1010 | tty->closing = 1; | |
b65b5b59 AC |
1011 | |
1012 | spin_unlock_irqrestore(&stallion_lock, flags); | |
1013 | ||
1da177e4 LT |
1014 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1015 | tty_wait_until_sent(tty, portp->closing_wait); | |
1016 | stl_waituntilsent(tty, (HZ / 2)); | |
1017 | ||
b65b5b59 AC |
1018 | |
1019 | spin_lock_irqsave(&stallion_lock, flags); | |
1da177e4 | 1020 | portp->flags &= ~ASYNC_INITIALIZED; |
b65b5b59 AC |
1021 | spin_unlock_irqrestore(&stallion_lock, flags); |
1022 | ||
1da177e4 LT |
1023 | stl_disableintrs(portp); |
1024 | if (tty->termios->c_cflag & HUPCL) | |
1025 | stl_setsignals(portp, 0, 0); | |
1026 | stl_enablerxtx(portp, 0, 0); | |
1027 | stl_flushbuffer(tty); | |
1028 | portp->istate = 0; | |
615e4a71 | 1029 | if (portp->tx.buf != NULL) { |
1da177e4 | 1030 | kfree(portp->tx.buf); |
615e4a71 JS |
1031 | portp->tx.buf = NULL; |
1032 | portp->tx.head = NULL; | |
1033 | portp->tx.tail = NULL; | |
1da177e4 LT |
1034 | } |
1035 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1036 | tty_ldisc_flush(tty); | |
1037 | ||
1038 | tty->closing = 0; | |
615e4a71 | 1039 | portp->tty = NULL; |
1da177e4 LT |
1040 | |
1041 | if (portp->openwaitcnt) { | |
1042 | if (portp->close_delay) | |
1043 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); | |
1044 | wake_up_interruptible(&portp->open_wait); | |
1045 | } | |
1046 | ||
1047 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1048 | wake_up_interruptible(&portp->close_wait); | |
1da177e4 LT |
1049 | } |
1050 | ||
1051 | /*****************************************************************************/ | |
1052 | ||
1053 | /* | |
1054 | * Write routine. Take data and stuff it in to the TX ring queue. | |
1055 | * If transmit interrupts are not running then start them. | |
1056 | */ | |
1057 | ||
1058 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
1059 | { | |
ca7ed0f2 | 1060 | struct stlport *portp; |
1da177e4 LT |
1061 | unsigned int len, stlen; |
1062 | unsigned char *chbuf; | |
1063 | char *head, *tail; | |
1064 | ||
a0564e14 | 1065 | pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count); |
1da177e4 | 1066 | |
1da177e4 | 1067 | portp = tty->driver_data; |
615e4a71 | 1068 | if (portp == NULL) |
014c2544 | 1069 | return 0; |
615e4a71 | 1070 | if (portp->tx.buf == NULL) |
014c2544 | 1071 | return 0; |
1da177e4 LT |
1072 | |
1073 | /* | |
1074 | * If copying direct from user space we must cater for page faults, | |
1075 | * causing us to "sleep" here for a while. To handle this copy in all | |
1076 | * the data we need now, into a local buffer. Then when we got it all | |
1077 | * copy it into the TX buffer. | |
1078 | */ | |
1079 | chbuf = (unsigned char *) buf; | |
1080 | ||
1081 | head = portp->tx.head; | |
1082 | tail = portp->tx.tail; | |
1083 | if (head >= tail) { | |
1084 | len = STL_TXBUFSIZE - (head - tail) - 1; | |
1085 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); | |
1086 | } else { | |
1087 | len = tail - head - 1; | |
1088 | stlen = len; | |
1089 | } | |
1090 | ||
1091 | len = MIN(len, count); | |
1092 | count = 0; | |
1093 | while (len > 0) { | |
1094 | stlen = MIN(len, stlen); | |
1095 | memcpy(head, chbuf, stlen); | |
1096 | len -= stlen; | |
1097 | chbuf += stlen; | |
1098 | count += stlen; | |
1099 | head += stlen; | |
1100 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { | |
1101 | head = portp->tx.buf; | |
1102 | stlen = tail - head; | |
1103 | } | |
1104 | } | |
1105 | portp->tx.head = head; | |
1106 | ||
1107 | clear_bit(ASYI_TXLOW, &portp->istate); | |
1108 | stl_startrxtx(portp, -1, 1); | |
1109 | ||
014c2544 | 1110 | return count; |
1da177e4 LT |
1111 | } |
1112 | ||
1113 | /*****************************************************************************/ | |
1114 | ||
1115 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) | |
1116 | { | |
ca7ed0f2 | 1117 | struct stlport *portp; |
1da177e4 LT |
1118 | unsigned int len; |
1119 | char *head, *tail; | |
1120 | ||
a0564e14 | 1121 | pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch); |
1da177e4 | 1122 | |
615e4a71 | 1123 | if (tty == NULL) |
1da177e4 LT |
1124 | return; |
1125 | portp = tty->driver_data; | |
615e4a71 | 1126 | if (portp == NULL) |
1da177e4 | 1127 | return; |
615e4a71 | 1128 | if (portp->tx.buf == NULL) |
1da177e4 LT |
1129 | return; |
1130 | ||
1131 | head = portp->tx.head; | |
1132 | tail = portp->tx.tail; | |
1133 | ||
1134 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); | |
1135 | len--; | |
1136 | ||
1137 | if (len > 0) { | |
1138 | *head++ = ch; | |
1139 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) | |
1140 | head = portp->tx.buf; | |
1141 | } | |
1142 | portp->tx.head = head; | |
1143 | } | |
1144 | ||
1145 | /*****************************************************************************/ | |
1146 | ||
1147 | /* | |
1148 | * If there are any characters in the buffer then make sure that TX | |
1149 | * interrupts are on and get'em out. Normally used after the putchar | |
1150 | * routine has been called. | |
1151 | */ | |
1152 | ||
1153 | static void stl_flushchars(struct tty_struct *tty) | |
1154 | { | |
ca7ed0f2 | 1155 | struct stlport *portp; |
1da177e4 | 1156 | |
a0564e14 | 1157 | pr_debug("stl_flushchars(tty=%p)\n", tty); |
1da177e4 | 1158 | |
615e4a71 | 1159 | if (tty == NULL) |
1da177e4 LT |
1160 | return; |
1161 | portp = tty->driver_data; | |
615e4a71 | 1162 | if (portp == NULL) |
1da177e4 | 1163 | return; |
615e4a71 | 1164 | if (portp->tx.buf == NULL) |
1da177e4 LT |
1165 | return; |
1166 | ||
1da177e4 LT |
1167 | stl_startrxtx(portp, -1, 1); |
1168 | } | |
1169 | ||
1170 | /*****************************************************************************/ | |
1171 | ||
1172 | static int stl_writeroom(struct tty_struct *tty) | |
1173 | { | |
ca7ed0f2 | 1174 | struct stlport *portp; |
1da177e4 LT |
1175 | char *head, *tail; |
1176 | ||
a0564e14 | 1177 | pr_debug("stl_writeroom(tty=%p)\n", tty); |
1da177e4 | 1178 | |
615e4a71 | 1179 | if (tty == NULL) |
014c2544 | 1180 | return 0; |
1da177e4 | 1181 | portp = tty->driver_data; |
615e4a71 | 1182 | if (portp == NULL) |
014c2544 | 1183 | return 0; |
615e4a71 | 1184 | if (portp->tx.buf == NULL) |
014c2544 | 1185 | return 0; |
1da177e4 LT |
1186 | |
1187 | head = portp->tx.head; | |
1188 | tail = portp->tx.tail; | |
014c2544 | 1189 | return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | /*****************************************************************************/ | |
1193 | ||
1194 | /* | |
1195 | * Return number of chars in the TX buffer. Normally we would just | |
1196 | * calculate the number of chars in the buffer and return that, but if | |
1197 | * the buffer is empty and TX interrupts are still on then we return | |
1198 | * that the buffer still has 1 char in it. This way whoever called us | |
1199 | * will not think that ALL chars have drained - since the UART still | |
1200 | * must have some chars in it (we are busy after all). | |
1201 | */ | |
1202 | ||
1203 | static int stl_charsinbuffer(struct tty_struct *tty) | |
1204 | { | |
ca7ed0f2 | 1205 | struct stlport *portp; |
1da177e4 LT |
1206 | unsigned int size; |
1207 | char *head, *tail; | |
1208 | ||
a0564e14 | 1209 | pr_debug("stl_charsinbuffer(tty=%p)\n", tty); |
1da177e4 | 1210 | |
615e4a71 | 1211 | if (tty == NULL) |
014c2544 | 1212 | return 0; |
1da177e4 | 1213 | portp = tty->driver_data; |
615e4a71 | 1214 | if (portp == NULL) |
014c2544 | 1215 | return 0; |
615e4a71 | 1216 | if (portp->tx.buf == NULL) |
014c2544 | 1217 | return 0; |
1da177e4 LT |
1218 | |
1219 | head = portp->tx.head; | |
1220 | tail = portp->tx.tail; | |
1221 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
1222 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) | |
1223 | size = 1; | |
014c2544 | 1224 | return size; |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | /*****************************************************************************/ | |
1228 | ||
1229 | /* | |
1230 | * Generate the serial struct info. | |
1231 | */ | |
1232 | ||
ca7ed0f2 | 1233 | static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp) |
1da177e4 LT |
1234 | { |
1235 | struct serial_struct sio; | |
ca7ed0f2 | 1236 | struct stlbrd *brdp; |
1da177e4 | 1237 | |
a0564e14 | 1238 | pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp); |
1da177e4 LT |
1239 | |
1240 | memset(&sio, 0, sizeof(struct serial_struct)); | |
1241 | sio.line = portp->portnr; | |
1242 | sio.port = portp->ioaddr; | |
1243 | sio.flags = portp->flags; | |
1244 | sio.baud_base = portp->baud_base; | |
1245 | sio.close_delay = portp->close_delay; | |
1246 | sio.closing_wait = portp->closing_wait; | |
1247 | sio.custom_divisor = portp->custom_divisor; | |
1248 | sio.hub6 = 0; | |
1249 | if (portp->uartp == &stl_cd1400uart) { | |
1250 | sio.type = PORT_CIRRUS; | |
1251 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; | |
1252 | } else { | |
1253 | sio.type = PORT_UNKNOWN; | |
1254 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; | |
1255 | } | |
1256 | ||
1257 | brdp = stl_brds[portp->brdnr]; | |
615e4a71 | 1258 | if (brdp != NULL) |
1da177e4 LT |
1259 | sio.irq = brdp->irq; |
1260 | ||
1261 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; | |
1262 | } | |
1263 | ||
1264 | /*****************************************************************************/ | |
1265 | ||
1266 | /* | |
1267 | * Set port according to the serial struct info. | |
1268 | * At this point we do not do any auto-configure stuff, so we will | |
1269 | * just quietly ignore any requests to change irq, etc. | |
1270 | */ | |
1271 | ||
ca7ed0f2 | 1272 | static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp) |
1da177e4 LT |
1273 | { |
1274 | struct serial_struct sio; | |
1275 | ||
a0564e14 | 1276 | pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp); |
1da177e4 LT |
1277 | |
1278 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) | |
1279 | return -EFAULT; | |
1280 | if (!capable(CAP_SYS_ADMIN)) { | |
1281 | if ((sio.baud_base != portp->baud_base) || | |
1282 | (sio.close_delay != portp->close_delay) || | |
1283 | ((sio.flags & ~ASYNC_USR_MASK) != | |
1284 | (portp->flags & ~ASYNC_USR_MASK))) | |
014c2544 | 1285 | return -EPERM; |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | | |
1289 | (sio.flags & ASYNC_USR_MASK); | |
1290 | portp->baud_base = sio.baud_base; | |
1291 | portp->close_delay = sio.close_delay; | |
1292 | portp->closing_wait = sio.closing_wait; | |
1293 | portp->custom_divisor = sio.custom_divisor; | |
1294 | stl_setport(portp, portp->tty->termios); | |
014c2544 | 1295 | return 0; |
1da177e4 LT |
1296 | } |
1297 | ||
1298 | /*****************************************************************************/ | |
1299 | ||
1300 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) | |
1301 | { | |
ca7ed0f2 | 1302 | struct stlport *portp; |
1da177e4 | 1303 | |
615e4a71 | 1304 | if (tty == NULL) |
014c2544 | 1305 | return -ENODEV; |
1da177e4 | 1306 | portp = tty->driver_data; |
615e4a71 | 1307 | if (portp == NULL) |
014c2544 | 1308 | return -ENODEV; |
1da177e4 | 1309 | if (tty->flags & (1 << TTY_IO_ERROR)) |
014c2544 | 1310 | return -EIO; |
1da177e4 LT |
1311 | |
1312 | return stl_getsignals(portp); | |
1313 | } | |
1314 | ||
1315 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, | |
1316 | unsigned int set, unsigned int clear) | |
1317 | { | |
ca7ed0f2 | 1318 | struct stlport *portp; |
1da177e4 LT |
1319 | int rts = -1, dtr = -1; |
1320 | ||
615e4a71 | 1321 | if (tty == NULL) |
014c2544 | 1322 | return -ENODEV; |
1da177e4 | 1323 | portp = tty->driver_data; |
615e4a71 | 1324 | if (portp == NULL) |
014c2544 | 1325 | return -ENODEV; |
1da177e4 | 1326 | if (tty->flags & (1 << TTY_IO_ERROR)) |
014c2544 | 1327 | return -EIO; |
1da177e4 LT |
1328 | |
1329 | if (set & TIOCM_RTS) | |
1330 | rts = 1; | |
1331 | if (set & TIOCM_DTR) | |
1332 | dtr = 1; | |
1333 | if (clear & TIOCM_RTS) | |
1334 | rts = 0; | |
1335 | if (clear & TIOCM_DTR) | |
1336 | dtr = 0; | |
1337 | ||
1338 | stl_setsignals(portp, dtr, rts); | |
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) | |
1343 | { | |
ca7ed0f2 | 1344 | struct stlport *portp; |
1da177e4 LT |
1345 | unsigned int ival; |
1346 | int rc; | |
1347 | void __user *argp = (void __user *)arg; | |
1348 | ||
a0564e14 JS |
1349 | pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd, |
1350 | arg); | |
1da177e4 | 1351 | |
615e4a71 | 1352 | if (tty == NULL) |
014c2544 | 1353 | return -ENODEV; |
1da177e4 | 1354 | portp = tty->driver_data; |
615e4a71 | 1355 | if (portp == NULL) |
014c2544 | 1356 | return -ENODEV; |
1da177e4 LT |
1357 | |
1358 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
1359 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { | |
1360 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
014c2544 | 1361 | return -EIO; |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | rc = 0; | |
1365 | ||
1366 | switch (cmd) { | |
1367 | case TIOCGSOFTCAR: | |
1368 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), | |
1369 | (unsigned __user *) argp); | |
1370 | break; | |
1371 | case TIOCSSOFTCAR: | |
1372 | if (get_user(ival, (unsigned int __user *) arg)) | |
1373 | return -EFAULT; | |
1374 | tty->termios->c_cflag = | |
1375 | (tty->termios->c_cflag & ~CLOCAL) | | |
1376 | (ival ? CLOCAL : 0); | |
1377 | break; | |
1378 | case TIOCGSERIAL: | |
1379 | rc = stl_getserial(portp, argp); | |
1380 | break; | |
1381 | case TIOCSSERIAL: | |
1382 | rc = stl_setserial(portp, argp); | |
1383 | break; | |
1384 | case COM_GETPORTSTATS: | |
1385 | rc = stl_getportstats(portp, argp); | |
1386 | break; | |
1387 | case COM_CLRPORTSTATS: | |
1388 | rc = stl_clrportstats(portp, argp); | |
1389 | break; | |
1390 | case TIOCSERCONFIG: | |
1391 | case TIOCSERGWILD: | |
1392 | case TIOCSERSWILD: | |
1393 | case TIOCSERGETLSR: | |
1394 | case TIOCSERGSTRUCT: | |
1395 | case TIOCSERGETMULTI: | |
1396 | case TIOCSERSETMULTI: | |
1397 | default: | |
1398 | rc = -ENOIOCTLCMD; | |
1399 | break; | |
1400 | } | |
1401 | ||
014c2544 | 1402 | return rc; |
1da177e4 LT |
1403 | } |
1404 | ||
1405 | /*****************************************************************************/ | |
1406 | ||
96b066b8 JS |
1407 | /* |
1408 | * Start the transmitter again. Just turn TX interrupts back on. | |
1409 | */ | |
1410 | ||
1411 | static void stl_start(struct tty_struct *tty) | |
1412 | { | |
1413 | struct stlport *portp; | |
1414 | ||
1415 | pr_debug("stl_start(tty=%p)\n", tty); | |
1416 | ||
1417 | if (tty == NULL) | |
1418 | return; | |
1419 | portp = tty->driver_data; | |
1420 | if (portp == NULL) | |
1421 | return; | |
1422 | stl_startrxtx(portp, -1, 1); | |
1423 | } | |
1424 | ||
1425 | /*****************************************************************************/ | |
1426 | ||
606d099c | 1427 | static void stl_settermios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 1428 | { |
ca7ed0f2 | 1429 | struct stlport *portp; |
606d099c | 1430 | struct ktermios *tiosp; |
1da177e4 | 1431 | |
a0564e14 | 1432 | pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old); |
1da177e4 | 1433 | |
615e4a71 | 1434 | if (tty == NULL) |
1da177e4 LT |
1435 | return; |
1436 | portp = tty->driver_data; | |
615e4a71 | 1437 | if (portp == NULL) |
1da177e4 LT |
1438 | return; |
1439 | ||
1440 | tiosp = tty->termios; | |
1441 | if ((tiosp->c_cflag == old->c_cflag) && | |
1442 | (tiosp->c_iflag == old->c_iflag)) | |
1443 | return; | |
1444 | ||
1445 | stl_setport(portp, tiosp); | |
1446 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), | |
1447 | -1); | |
1448 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { | |
1449 | tty->hw_stopped = 0; | |
1450 | stl_start(tty); | |
1451 | } | |
1452 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) | |
1453 | wake_up_interruptible(&portp->open_wait); | |
1454 | } | |
1455 | ||
1456 | /*****************************************************************************/ | |
1457 | ||
1458 | /* | |
1459 | * Attempt to flow control who ever is sending us data. Based on termios | |
1460 | * settings use software or/and hardware flow control. | |
1461 | */ | |
1462 | ||
1463 | static void stl_throttle(struct tty_struct *tty) | |
1464 | { | |
ca7ed0f2 | 1465 | struct stlport *portp; |
1da177e4 | 1466 | |
a0564e14 | 1467 | pr_debug("stl_throttle(tty=%p)\n", tty); |
1da177e4 | 1468 | |
615e4a71 | 1469 | if (tty == NULL) |
1da177e4 LT |
1470 | return; |
1471 | portp = tty->driver_data; | |
615e4a71 | 1472 | if (portp == NULL) |
1da177e4 LT |
1473 | return; |
1474 | stl_flowctrl(portp, 0); | |
1475 | } | |
1476 | ||
1477 | /*****************************************************************************/ | |
1478 | ||
1479 | /* | |
1480 | * Unflow control the device sending us data... | |
1481 | */ | |
1482 | ||
1483 | static void stl_unthrottle(struct tty_struct *tty) | |
1484 | { | |
ca7ed0f2 | 1485 | struct stlport *portp; |
1da177e4 | 1486 | |
a0564e14 | 1487 | pr_debug("stl_unthrottle(tty=%p)\n", tty); |
1da177e4 | 1488 | |
615e4a71 | 1489 | if (tty == NULL) |
1da177e4 LT |
1490 | return; |
1491 | portp = tty->driver_data; | |
615e4a71 | 1492 | if (portp == NULL) |
1da177e4 LT |
1493 | return; |
1494 | stl_flowctrl(portp, 1); | |
1495 | } | |
1496 | ||
1497 | /*****************************************************************************/ | |
1498 | ||
1499 | /* | |
1500 | * Stop the transmitter. Basically to do this we will just turn TX | |
1501 | * interrupts off. | |
1502 | */ | |
1503 | ||
1504 | static void stl_stop(struct tty_struct *tty) | |
1505 | { | |
ca7ed0f2 | 1506 | struct stlport *portp; |
1da177e4 | 1507 | |
a0564e14 | 1508 | pr_debug("stl_stop(tty=%p)\n", tty); |
1da177e4 | 1509 | |
615e4a71 | 1510 | if (tty == NULL) |
1da177e4 LT |
1511 | return; |
1512 | portp = tty->driver_data; | |
615e4a71 | 1513 | if (portp == NULL) |
1da177e4 LT |
1514 | return; |
1515 | stl_startrxtx(portp, -1, 0); | |
1516 | } | |
1517 | ||
1518 | /*****************************************************************************/ | |
1519 | ||
1da177e4 LT |
1520 | /* |
1521 | * Hangup this port. This is pretty much like closing the port, only | |
1522 | * a little more brutal. No waiting for data to drain. Shutdown the | |
1523 | * port and maybe drop signals. | |
1524 | */ | |
1525 | ||
1526 | static void stl_hangup(struct tty_struct *tty) | |
1527 | { | |
ca7ed0f2 | 1528 | struct stlport *portp; |
1da177e4 | 1529 | |
a0564e14 | 1530 | pr_debug("stl_hangup(tty=%p)\n", tty); |
1da177e4 | 1531 | |
615e4a71 | 1532 | if (tty == NULL) |
1da177e4 LT |
1533 | return; |
1534 | portp = tty->driver_data; | |
615e4a71 | 1535 | if (portp == NULL) |
1da177e4 LT |
1536 | return; |
1537 | ||
1538 | portp->flags &= ~ASYNC_INITIALIZED; | |
1539 | stl_disableintrs(portp); | |
1540 | if (tty->termios->c_cflag & HUPCL) | |
1541 | stl_setsignals(portp, 0, 0); | |
1542 | stl_enablerxtx(portp, 0, 0); | |
1543 | stl_flushbuffer(tty); | |
1544 | portp->istate = 0; | |
1545 | set_bit(TTY_IO_ERROR, &tty->flags); | |
615e4a71 | 1546 | if (portp->tx.buf != NULL) { |
1da177e4 | 1547 | kfree(portp->tx.buf); |
615e4a71 JS |
1548 | portp->tx.buf = NULL; |
1549 | portp->tx.head = NULL; | |
1550 | portp->tx.tail = NULL; | |
1da177e4 | 1551 | } |
615e4a71 | 1552 | portp->tty = NULL; |
1da177e4 LT |
1553 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
1554 | portp->refcount = 0; | |
1555 | wake_up_interruptible(&portp->open_wait); | |
1556 | } | |
1557 | ||
1558 | /*****************************************************************************/ | |
1559 | ||
1da177e4 LT |
1560 | static void stl_breakctl(struct tty_struct *tty, int state) |
1561 | { | |
ca7ed0f2 | 1562 | struct stlport *portp; |
1da177e4 | 1563 | |
a0564e14 | 1564 | pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state); |
1da177e4 | 1565 | |
615e4a71 | 1566 | if (tty == NULL) |
1da177e4 LT |
1567 | return; |
1568 | portp = tty->driver_data; | |
615e4a71 | 1569 | if (portp == NULL) |
1da177e4 LT |
1570 | return; |
1571 | ||
1572 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); | |
1573 | } | |
1574 | ||
1575 | /*****************************************************************************/ | |
1576 | ||
1da177e4 LT |
1577 | static void stl_sendxchar(struct tty_struct *tty, char ch) |
1578 | { | |
ca7ed0f2 | 1579 | struct stlport *portp; |
1da177e4 | 1580 | |
a0564e14 | 1581 | pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch); |
1da177e4 | 1582 | |
615e4a71 | 1583 | if (tty == NULL) |
1da177e4 LT |
1584 | return; |
1585 | portp = tty->driver_data; | |
615e4a71 | 1586 | if (portp == NULL) |
1da177e4 LT |
1587 | return; |
1588 | ||
1589 | if (ch == STOP_CHAR(tty)) | |
1590 | stl_sendflow(portp, 0); | |
1591 | else if (ch == START_CHAR(tty)) | |
1592 | stl_sendflow(portp, 1); | |
1593 | else | |
1594 | stl_putchar(tty, ch); | |
1595 | } | |
1596 | ||
1597 | /*****************************************************************************/ | |
1598 | ||
1599 | #define MAXLINE 80 | |
1600 | ||
1601 | /* | |
1602 | * Format info for a specified port. The line is deliberately limited | |
1603 | * to 80 characters. (If it is too long it will be truncated, if too | |
1604 | * short then padded with spaces). | |
1605 | */ | |
1606 | ||
ca7ed0f2 | 1607 | static int stl_portinfo(struct stlport *portp, int portnr, char *pos) |
1da177e4 LT |
1608 | { |
1609 | char *sp; | |
1610 | int sigs, cnt; | |
1611 | ||
1612 | sp = pos; | |
1613 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", | |
1614 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", | |
1615 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); | |
1616 | ||
1617 | if (portp->stats.rxframing) | |
1618 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); | |
1619 | if (portp->stats.rxparity) | |
1620 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); | |
1621 | if (portp->stats.rxbreaks) | |
1622 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); | |
1623 | if (portp->stats.rxoverrun) | |
1624 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); | |
1625 | ||
1626 | sigs = stl_getsignals(portp); | |
1627 | cnt = sprintf(sp, "%s%s%s%s%s ", | |
1628 | (sigs & TIOCM_RTS) ? "|RTS" : "", | |
1629 | (sigs & TIOCM_CTS) ? "|CTS" : "", | |
1630 | (sigs & TIOCM_DTR) ? "|DTR" : "", | |
1631 | (sigs & TIOCM_CD) ? "|DCD" : "", | |
1632 | (sigs & TIOCM_DSR) ? "|DSR" : ""); | |
1633 | *sp = ' '; | |
1634 | sp += cnt; | |
1635 | ||
1636 | for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) | |
1637 | *sp++ = ' '; | |
1638 | if (cnt >= MAXLINE) | |
1639 | pos[(MAXLINE - 2)] = '+'; | |
1640 | pos[(MAXLINE - 1)] = '\n'; | |
1641 | ||
014c2544 | 1642 | return MAXLINE; |
1da177e4 LT |
1643 | } |
1644 | ||
1645 | /*****************************************************************************/ | |
1646 | ||
1647 | /* | |
1648 | * Port info, read from the /proc file system. | |
1649 | */ | |
1650 | ||
1651 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) | |
1652 | { | |
ca7ed0f2 JS |
1653 | struct stlbrd *brdp; |
1654 | struct stlpanel *panelp; | |
1655 | struct stlport *portp; | |
1da177e4 LT |
1656 | int brdnr, panelnr, portnr, totalport; |
1657 | int curoff, maxoff; | |
1658 | char *pos; | |
1659 | ||
a0564e14 JS |
1660 | pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p," |
1661 | "data=%p\n", page, start, off, count, eof, data); | |
1da177e4 LT |
1662 | |
1663 | pos = page; | |
1664 | totalport = 0; | |
1665 | curoff = 0; | |
1666 | ||
1667 | if (off == 0) { | |
1668 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, | |
1669 | stl_drvversion); | |
1670 | while (pos < (page + MAXLINE - 1)) | |
1671 | *pos++ = ' '; | |
1672 | *pos++ = '\n'; | |
1673 | } | |
1674 | curoff = MAXLINE; | |
1675 | ||
1676 | /* | |
1677 | * We scan through for each board, panel and port. The offset is | |
1678 | * calculated on the fly, and irrelevant ports are skipped. | |
1679 | */ | |
1680 | for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { | |
1681 | brdp = stl_brds[brdnr]; | |
615e4a71 | 1682 | if (brdp == NULL) |
1da177e4 LT |
1683 | continue; |
1684 | if (brdp->state == 0) | |
1685 | continue; | |
1686 | ||
1687 | maxoff = curoff + (brdp->nrports * MAXLINE); | |
1688 | if (off >= maxoff) { | |
1689 | curoff = maxoff; | |
1690 | continue; | |
1691 | } | |
1692 | ||
1693 | totalport = brdnr * STL_MAXPORTS; | |
1694 | for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { | |
1695 | panelp = brdp->panels[panelnr]; | |
615e4a71 | 1696 | if (panelp == NULL) |
1da177e4 LT |
1697 | continue; |
1698 | ||
1699 | maxoff = curoff + (panelp->nrports * MAXLINE); | |
1700 | if (off >= maxoff) { | |
1701 | curoff = maxoff; | |
1702 | totalport += panelp->nrports; | |
1703 | continue; | |
1704 | } | |
1705 | ||
1706 | for (portnr = 0; (portnr < panelp->nrports); portnr++, | |
1707 | totalport++) { | |
1708 | portp = panelp->ports[portnr]; | |
615e4a71 | 1709 | if (portp == NULL) |
1da177e4 LT |
1710 | continue; |
1711 | if (off >= (curoff += MAXLINE)) | |
1712 | continue; | |
1713 | if ((pos - page + MAXLINE) > count) | |
1714 | goto stl_readdone; | |
1715 | pos += stl_portinfo(portp, totalport, pos); | |
1716 | } | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | *eof = 1; | |
1721 | ||
1722 | stl_readdone: | |
1723 | *start = page; | |
014c2544 | 1724 | return (pos - page); |
1da177e4 LT |
1725 | } |
1726 | ||
1727 | /*****************************************************************************/ | |
1728 | ||
1729 | /* | |
1730 | * All board interrupts are vectored through here first. This code then | |
1731 | * calls off to the approrpriate board interrupt handlers. | |
1732 | */ | |
1733 | ||
7d12e780 | 1734 | static irqreturn_t stl_intr(int irq, void *dev_id) |
1da177e4 | 1735 | { |
ca7ed0f2 | 1736 | struct stlbrd *brdp = dev_id; |
1da177e4 | 1737 | |
a0564e14 | 1738 | pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq); |
1da177e4 LT |
1739 | |
1740 | return IRQ_RETVAL((* brdp->isr)(brdp)); | |
1741 | } | |
1742 | ||
1743 | /*****************************************************************************/ | |
1744 | ||
1745 | /* | |
1746 | * Interrupt service routine for EasyIO board types. | |
1747 | */ | |
1748 | ||
ca7ed0f2 | 1749 | static int stl_eiointr(struct stlbrd *brdp) |
1da177e4 | 1750 | { |
ca7ed0f2 | 1751 | struct stlpanel *panelp; |
1da177e4 LT |
1752 | unsigned int iobase; |
1753 | int handled = 0; | |
1754 | ||
b65b5b59 | 1755 | spin_lock(&brd_lock); |
1da177e4 LT |
1756 | panelp = brdp->panels[0]; |
1757 | iobase = panelp->iobase; | |
1758 | while (inb(brdp->iostatus) & EIO_INTRPEND) { | |
1759 | handled = 1; | |
1760 | (* panelp->isr)(panelp, iobase); | |
1761 | } | |
b65b5b59 | 1762 | spin_unlock(&brd_lock); |
1da177e4 LT |
1763 | return handled; |
1764 | } | |
1765 | ||
1766 | /*****************************************************************************/ | |
1767 | ||
1768 | /* | |
1769 | * Interrupt service routine for ECH-AT board types. | |
1770 | */ | |
1771 | ||
ca7ed0f2 | 1772 | static int stl_echatintr(struct stlbrd *brdp) |
1da177e4 | 1773 | { |
ca7ed0f2 | 1774 | struct stlpanel *panelp; |
1da177e4 LT |
1775 | unsigned int ioaddr; |
1776 | int bnknr; | |
1777 | int handled = 0; | |
1778 | ||
1779 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); | |
1780 | ||
1781 | while (inb(brdp->iostatus) & ECH_INTRPEND) { | |
1782 | handled = 1; | |
1783 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
1784 | ioaddr = brdp->bnkstataddr[bnknr]; | |
1785 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1786 | panelp = brdp->bnk2panel[bnknr]; | |
1787 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1788 | } | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); | |
1793 | ||
1794 | return handled; | |
1795 | } | |
1796 | ||
1797 | /*****************************************************************************/ | |
1798 | ||
1799 | /* | |
1800 | * Interrupt service routine for ECH-MCA board types. | |
1801 | */ | |
1802 | ||
ca7ed0f2 | 1803 | static int stl_echmcaintr(struct stlbrd *brdp) |
1da177e4 | 1804 | { |
ca7ed0f2 | 1805 | struct stlpanel *panelp; |
1da177e4 LT |
1806 | unsigned int ioaddr; |
1807 | int bnknr; | |
1808 | int handled = 0; | |
1809 | ||
1810 | while (inb(brdp->iostatus) & ECH_INTRPEND) { | |
1811 | handled = 1; | |
1812 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
1813 | ioaddr = brdp->bnkstataddr[bnknr]; | |
1814 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1815 | panelp = brdp->bnk2panel[bnknr]; | |
1816 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1817 | } | |
1818 | } | |
1819 | } | |
1820 | return handled; | |
1821 | } | |
1822 | ||
1823 | /*****************************************************************************/ | |
1824 | ||
1825 | /* | |
1826 | * Interrupt service routine for ECH-PCI board types. | |
1827 | */ | |
1828 | ||
ca7ed0f2 | 1829 | static int stl_echpciintr(struct stlbrd *brdp) |
1da177e4 | 1830 | { |
ca7ed0f2 | 1831 | struct stlpanel *panelp; |
1da177e4 LT |
1832 | unsigned int ioaddr; |
1833 | int bnknr, recheck; | |
1834 | int handled = 0; | |
1835 | ||
1836 | while (1) { | |
1837 | recheck = 0; | |
1838 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
1839 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); | |
1840 | ioaddr = brdp->bnkstataddr[bnknr]; | |
1841 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1842 | panelp = brdp->bnk2panel[bnknr]; | |
1843 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1844 | recheck++; | |
1845 | handled = 1; | |
1846 | } | |
1847 | } | |
1848 | if (! recheck) | |
1849 | break; | |
1850 | } | |
1851 | return handled; | |
1852 | } | |
1853 | ||
1854 | /*****************************************************************************/ | |
1855 | ||
1856 | /* | |
1857 | * Interrupt service routine for ECH-8/64-PCI board types. | |
1858 | */ | |
1859 | ||
ca7ed0f2 | 1860 | static int stl_echpci64intr(struct stlbrd *brdp) |
1da177e4 | 1861 | { |
ca7ed0f2 | 1862 | struct stlpanel *panelp; |
1da177e4 LT |
1863 | unsigned int ioaddr; |
1864 | int bnknr; | |
1865 | int handled = 0; | |
1866 | ||
1867 | while (inb(brdp->ioctrl) & 0x1) { | |
1868 | handled = 1; | |
1869 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { | |
1870 | ioaddr = brdp->bnkstataddr[bnknr]; | |
1871 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1872 | panelp = brdp->bnk2panel[bnknr]; | |
1873 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1874 | } | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | return handled; | |
1879 | } | |
1880 | ||
1881 | /*****************************************************************************/ | |
1882 | ||
1883 | /* | |
1884 | * Service an off-level request for some channel. | |
1885 | */ | |
3e577a80 | 1886 | static void stl_offintr(struct work_struct *work) |
1da177e4 | 1887 | { |
ca7ed0f2 | 1888 | struct stlport *portp = container_of(work, struct stlport, tqueue); |
1da177e4 LT |
1889 | struct tty_struct *tty; |
1890 | unsigned int oldsigs; | |
1891 | ||
a0564e14 | 1892 | pr_debug("stl_offintr(portp=%p)\n", portp); |
1da177e4 | 1893 | |
615e4a71 | 1894 | if (portp == NULL) |
1da177e4 LT |
1895 | return; |
1896 | ||
1897 | tty = portp->tty; | |
615e4a71 | 1898 | if (tty == NULL) |
1da177e4 LT |
1899 | return; |
1900 | ||
1901 | lock_kernel(); | |
1902 | if (test_bit(ASYI_TXLOW, &portp->istate)) { | |
1903 | tty_wakeup(tty); | |
1904 | } | |
1905 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { | |
1906 | clear_bit(ASYI_DCDCHANGE, &portp->istate); | |
1907 | oldsigs = portp->sigs; | |
1908 | portp->sigs = stl_getsignals(portp); | |
1909 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) | |
1910 | wake_up_interruptible(&portp->open_wait); | |
1911 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { | |
1912 | if (portp->flags & ASYNC_CHECK_CD) | |
1913 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ | |
1914 | } | |
1915 | } | |
1916 | unlock_kernel(); | |
1917 | } | |
1918 | ||
1919 | /*****************************************************************************/ | |
1920 | ||
1921 | /* | |
1922 | * Initialize all the ports on a panel. | |
1923 | */ | |
1924 | ||
ca7ed0f2 | 1925 | static int __init stl_initports(struct stlbrd *brdp, struct stlpanel *panelp) |
1da177e4 | 1926 | { |
ca7ed0f2 | 1927 | struct stlport *portp; |
1da177e4 LT |
1928 | int chipmask, i; |
1929 | ||
a0564e14 | 1930 | pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp); |
1da177e4 LT |
1931 | |
1932 | chipmask = stl_panelinit(brdp, panelp); | |
1933 | ||
1934 | /* | |
1935 | * All UART's are initialized (if found!). Now go through and setup | |
1936 | * each ports data structures. | |
1937 | */ | |
1938 | for (i = 0; (i < panelp->nrports); i++) { | |
ca7ed0f2 | 1939 | portp = kzalloc(sizeof(struct stlport), GFP_KERNEL); |
b0b4ed72 | 1940 | if (!portp) { |
1da177e4 | 1941 | printk("STALLION: failed to allocate memory " |
ca7ed0f2 | 1942 | "(size=%Zd)\n", sizeof(struct stlport)); |
1da177e4 LT |
1943 | break; |
1944 | } | |
1da177e4 LT |
1945 | |
1946 | portp->magic = STL_PORTMAGIC; | |
1947 | portp->portnr = i; | |
1948 | portp->brdnr = panelp->brdnr; | |
1949 | portp->panelnr = panelp->panelnr; | |
1950 | portp->uartp = panelp->uartp; | |
1951 | portp->clk = brdp->clk; | |
1952 | portp->baud_base = STL_BAUDBASE; | |
1953 | portp->close_delay = STL_CLOSEDELAY; | |
1954 | portp->closing_wait = 30 * HZ; | |
3e577a80 | 1955 | INIT_WORK(&portp->tqueue, stl_offintr); |
1da177e4 LT |
1956 | init_waitqueue_head(&portp->open_wait); |
1957 | init_waitqueue_head(&portp->close_wait); | |
1958 | portp->stats.brd = portp->brdnr; | |
1959 | portp->stats.panel = portp->panelnr; | |
1960 | portp->stats.port = portp->portnr; | |
1961 | panelp->ports[i] = portp; | |
1962 | stl_portinit(brdp, panelp, portp); | |
1963 | } | |
1964 | ||
1965 | return(0); | |
1966 | } | |
1967 | ||
1968 | /*****************************************************************************/ | |
1969 | ||
1970 | /* | |
1971 | * Try to find and initialize an EasyIO board. | |
1972 | */ | |
1973 | ||
40e82652 | 1974 | static int __init stl_initeio(struct stlbrd *brdp) |
1da177e4 | 1975 | { |
ca7ed0f2 | 1976 | struct stlpanel *panelp; |
1da177e4 LT |
1977 | unsigned int status; |
1978 | char *name; | |
1979 | int rc; | |
1980 | ||
a0564e14 | 1981 | pr_debug("stl_initeio(brdp=%p)\n", brdp); |
1da177e4 LT |
1982 | |
1983 | brdp->ioctrl = brdp->ioaddr1 + 1; | |
1984 | brdp->iostatus = brdp->ioaddr1 + 2; | |
1985 | ||
1986 | status = inb(brdp->iostatus); | |
1987 | if ((status & EIO_IDBITMASK) == EIO_MK3) | |
1988 | brdp->ioctrl++; | |
1989 | ||
1990 | /* | |
1991 | * Handle board specific stuff now. The real difference is PCI | |
1992 | * or not PCI. | |
1993 | */ | |
1994 | if (brdp->brdtype == BRD_EASYIOPCI) { | |
1995 | brdp->iosize1 = 0x80; | |
1996 | brdp->iosize2 = 0x80; | |
1997 | name = "serial(EIO-PCI)"; | |
1998 | outb(0x41, (brdp->ioaddr2 + 0x4c)); | |
1999 | } else { | |
2000 | brdp->iosize1 = 8; | |
2001 | name = "serial(EIO)"; | |
2002 | if ((brdp->irq < 0) || (brdp->irq > 15) || | |
2003 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2004 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2005 | brdp->irq, brdp->brdnr); | |
2006 | return(-EINVAL); | |
2007 | } | |
2008 | outb((stl_vecmap[brdp->irq] | EIO_0WS | | |
2009 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), | |
2010 | brdp->ioctrl); | |
2011 | } | |
2012 | ||
2013 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { | |
2014 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " | |
2015 | "%x conflicts with another device\n", brdp->brdnr, | |
2016 | brdp->ioaddr1); | |
2017 | return(-EBUSY); | |
2018 | } | |
2019 | ||
2020 | if (brdp->iosize2 > 0) | |
2021 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { | |
2022 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " | |
2023 | "address %x conflicts with another device\n", | |
2024 | brdp->brdnr, brdp->ioaddr2); | |
2025 | printk(KERN_WARNING "STALLION: Warning, also " | |
2026 | "releasing board %d I/O address %x \n", | |
2027 | brdp->brdnr, brdp->ioaddr1); | |
2028 | release_region(brdp->ioaddr1, brdp->iosize1); | |
2029 | return(-EBUSY); | |
2030 | } | |
2031 | ||
2032 | /* | |
2033 | * Everything looks OK, so let's go ahead and probe for the hardware. | |
2034 | */ | |
2035 | brdp->clk = CD1400_CLK; | |
2036 | brdp->isr = stl_eiointr; | |
2037 | ||
2038 | switch (status & EIO_IDBITMASK) { | |
2039 | case EIO_8PORTM: | |
2040 | brdp->clk = CD1400_CLK8M; | |
2041 | /* fall thru */ | |
2042 | case EIO_8PORTRS: | |
2043 | case EIO_8PORTDI: | |
2044 | brdp->nrports = 8; | |
2045 | break; | |
2046 | case EIO_4PORTRS: | |
2047 | brdp->nrports = 4; | |
2048 | break; | |
2049 | case EIO_MK3: | |
2050 | switch (status & EIO_BRDMASK) { | |
2051 | case ID_BRD4: | |
2052 | brdp->nrports = 4; | |
2053 | break; | |
2054 | case ID_BRD8: | |
2055 | brdp->nrports = 8; | |
2056 | break; | |
2057 | case ID_BRD16: | |
2058 | brdp->nrports = 16; | |
2059 | break; | |
2060 | default: | |
2061 | return(-ENODEV); | |
2062 | } | |
2063 | break; | |
2064 | default: | |
2065 | return(-ENODEV); | |
2066 | } | |
2067 | ||
2068 | /* | |
2069 | * We have verified that the board is actually present, so now we | |
2070 | * can complete the setup. | |
2071 | */ | |
2072 | ||
ca7ed0f2 | 2073 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
b0b4ed72 | 2074 | if (!panelp) { |
1da177e4 | 2075 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
ca7ed0f2 | 2076 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
b0b4ed72 | 2077 | return -ENOMEM; |
1da177e4 | 2078 | } |
1da177e4 LT |
2079 | |
2080 | panelp->magic = STL_PANELMAGIC; | |
2081 | panelp->brdnr = brdp->brdnr; | |
2082 | panelp->panelnr = 0; | |
2083 | panelp->nrports = brdp->nrports; | |
2084 | panelp->iobase = brdp->ioaddr1; | |
2085 | panelp->hwid = status; | |
2086 | if ((status & EIO_IDBITMASK) == EIO_MK3) { | |
615e4a71 | 2087 | panelp->uartp = &stl_sc26198uart; |
1da177e4 LT |
2088 | panelp->isr = stl_sc26198intr; |
2089 | } else { | |
615e4a71 | 2090 | panelp->uartp = &stl_cd1400uart; |
1da177e4 LT |
2091 | panelp->isr = stl_cd1400eiointr; |
2092 | } | |
2093 | ||
2094 | brdp->panels[0] = panelp; | |
2095 | brdp->nrpanels = 1; | |
2096 | brdp->state |= BRD_FOUND; | |
2097 | brdp->hwid = status; | |
0f2ed4c6 | 2098 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
1da177e4 LT |
2099 | printk("STALLION: failed to register interrupt " |
2100 | "routine for %s irq=%d\n", name, brdp->irq); | |
2101 | rc = -ENODEV; | |
2102 | } else { | |
2103 | rc = 0; | |
2104 | } | |
014c2544 | 2105 | return rc; |
1da177e4 LT |
2106 | } |
2107 | ||
2108 | /*****************************************************************************/ | |
2109 | ||
2110 | /* | |
2111 | * Try to find an ECH board and initialize it. This code is capable of | |
2112 | * dealing with all types of ECH board. | |
2113 | */ | |
2114 | ||
40e82652 | 2115 | static int __init stl_initech(struct stlbrd *brdp) |
1da177e4 | 2116 | { |
ca7ed0f2 | 2117 | struct stlpanel *panelp; |
1da177e4 LT |
2118 | unsigned int status, nxtid, ioaddr, conflict; |
2119 | int panelnr, banknr, i; | |
2120 | char *name; | |
2121 | ||
a0564e14 | 2122 | pr_debug("stl_initech(brdp=%p)\n", brdp); |
1da177e4 LT |
2123 | |
2124 | status = 0; | |
2125 | conflict = 0; | |
2126 | ||
2127 | /* | |
2128 | * Set up the initial board register contents for boards. This varies a | |
2129 | * bit between the different board types. So we need to handle each | |
2130 | * separately. Also do a check that the supplied IRQ is good. | |
2131 | */ | |
2132 | switch (brdp->brdtype) { | |
2133 | ||
2134 | case BRD_ECH: | |
2135 | brdp->isr = stl_echatintr; | |
2136 | brdp->ioctrl = brdp->ioaddr1 + 1; | |
2137 | brdp->iostatus = brdp->ioaddr1 + 1; | |
2138 | status = inb(brdp->iostatus); | |
2139 | if ((status & ECH_IDBITMASK) != ECH_ID) | |
2140 | return(-ENODEV); | |
2141 | if ((brdp->irq < 0) || (brdp->irq > 15) || | |
2142 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2143 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2144 | brdp->irq, brdp->brdnr); | |
2145 | return(-EINVAL); | |
2146 | } | |
2147 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); | |
2148 | status |= (stl_vecmap[brdp->irq] << 1); | |
2149 | outb((status | ECH_BRDRESET), brdp->ioaddr1); | |
2150 | brdp->ioctrlval = ECH_INTENABLE | | |
2151 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); | |
2152 | for (i = 0; (i < 10); i++) | |
2153 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); | |
2154 | brdp->iosize1 = 2; | |
2155 | brdp->iosize2 = 32; | |
2156 | name = "serial(EC8/32)"; | |
2157 | outb(status, brdp->ioaddr1); | |
2158 | break; | |
2159 | ||
2160 | case BRD_ECHMC: | |
2161 | brdp->isr = stl_echmcaintr; | |
2162 | brdp->ioctrl = brdp->ioaddr1 + 0x20; | |
2163 | brdp->iostatus = brdp->ioctrl; | |
2164 | status = inb(brdp->iostatus); | |
2165 | if ((status & ECH_IDBITMASK) != ECH_ID) | |
2166 | return(-ENODEV); | |
2167 | if ((brdp->irq < 0) || (brdp->irq > 15) || | |
2168 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2169 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2170 | brdp->irq, brdp->brdnr); | |
2171 | return(-EINVAL); | |
2172 | } | |
2173 | outb(ECHMC_BRDRESET, brdp->ioctrl); | |
2174 | outb(ECHMC_INTENABLE, brdp->ioctrl); | |
2175 | brdp->iosize1 = 64; | |
2176 | name = "serial(EC8/32-MC)"; | |
2177 | break; | |
2178 | ||
2179 | case BRD_ECHPCI: | |
2180 | brdp->isr = stl_echpciintr; | |
2181 | brdp->ioctrl = brdp->ioaddr1 + 2; | |
2182 | brdp->iosize1 = 4; | |
2183 | brdp->iosize2 = 8; | |
2184 | name = "serial(EC8/32-PCI)"; | |
2185 | break; | |
2186 | ||
2187 | case BRD_ECH64PCI: | |
2188 | brdp->isr = stl_echpci64intr; | |
2189 | brdp->ioctrl = brdp->ioaddr2 + 0x40; | |
2190 | outb(0x43, (brdp->ioaddr1 + 0x4c)); | |
2191 | brdp->iosize1 = 0x80; | |
2192 | brdp->iosize2 = 0x80; | |
2193 | name = "serial(EC8/64-PCI)"; | |
2194 | break; | |
2195 | ||
2196 | default: | |
2197 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); | |
2198 | return(-EINVAL); | |
2199 | break; | |
2200 | } | |
2201 | ||
2202 | /* | |
2203 | * Check boards for possible IO address conflicts and return fail status | |
2204 | * if an IO conflict found. | |
2205 | */ | |
2206 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { | |
2207 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " | |
2208 | "%x conflicts with another device\n", brdp->brdnr, | |
2209 | brdp->ioaddr1); | |
2210 | return(-EBUSY); | |
2211 | } | |
2212 | ||
2213 | if (brdp->iosize2 > 0) | |
2214 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { | |
2215 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " | |
2216 | "address %x conflicts with another device\n", | |
2217 | brdp->brdnr, brdp->ioaddr2); | |
2218 | printk(KERN_WARNING "STALLION: Warning, also " | |
2219 | "releasing board %d I/O address %x \n", | |
2220 | brdp->brdnr, brdp->ioaddr1); | |
2221 | release_region(brdp->ioaddr1, brdp->iosize1); | |
2222 | return(-EBUSY); | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * Scan through the secondary io address space looking for panels. | |
2227 | * As we find'em allocate and initialize panel structures for each. | |
2228 | */ | |
2229 | brdp->clk = CD1400_CLK; | |
2230 | brdp->hwid = status; | |
2231 | ||
2232 | ioaddr = brdp->ioaddr2; | |
2233 | banknr = 0; | |
2234 | panelnr = 0; | |
2235 | nxtid = 0; | |
2236 | ||
2237 | for (i = 0; (i < STL_MAXPANELS); i++) { | |
2238 | if (brdp->brdtype == BRD_ECHPCI) { | |
2239 | outb(nxtid, brdp->ioctrl); | |
2240 | ioaddr = brdp->ioaddr2; | |
2241 | } | |
2242 | status = inb(ioaddr + ECH_PNLSTATUS); | |
2243 | if ((status & ECH_PNLIDMASK) != nxtid) | |
2244 | break; | |
ca7ed0f2 | 2245 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
b0b4ed72 | 2246 | if (!panelp) { |
1da177e4 | 2247 | printk("STALLION: failed to allocate memory " |
ca7ed0f2 | 2248 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
1da177e4 LT |
2249 | break; |
2250 | } | |
1da177e4 LT |
2251 | panelp->magic = STL_PANELMAGIC; |
2252 | panelp->brdnr = brdp->brdnr; | |
2253 | panelp->panelnr = panelnr; | |
2254 | panelp->iobase = ioaddr; | |
2255 | panelp->pagenr = nxtid; | |
2256 | panelp->hwid = status; | |
2257 | brdp->bnk2panel[banknr] = panelp; | |
2258 | brdp->bnkpageaddr[banknr] = nxtid; | |
2259 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; | |
2260 | ||
2261 | if (status & ECH_PNLXPID) { | |
615e4a71 | 2262 | panelp->uartp = &stl_sc26198uart; |
1da177e4 LT |
2263 | panelp->isr = stl_sc26198intr; |
2264 | if (status & ECH_PNL16PORT) { | |
2265 | panelp->nrports = 16; | |
2266 | brdp->bnk2panel[banknr] = panelp; | |
2267 | brdp->bnkpageaddr[banknr] = nxtid; | |
2268 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + | |
2269 | ECH_PNLSTATUS; | |
2270 | } else { | |
2271 | panelp->nrports = 8; | |
2272 | } | |
2273 | } else { | |
615e4a71 | 2274 | panelp->uartp = &stl_cd1400uart; |
1da177e4 LT |
2275 | panelp->isr = stl_cd1400echintr; |
2276 | if (status & ECH_PNL16PORT) { | |
2277 | panelp->nrports = 16; | |
2278 | panelp->ackmask = 0x80; | |
2279 | if (brdp->brdtype != BRD_ECHPCI) | |
2280 | ioaddr += EREG_BANKSIZE; | |
2281 | brdp->bnk2panel[banknr] = panelp; | |
2282 | brdp->bnkpageaddr[banknr] = ++nxtid; | |
2283 | brdp->bnkstataddr[banknr++] = ioaddr + | |
2284 | ECH_PNLSTATUS; | |
2285 | } else { | |
2286 | panelp->nrports = 8; | |
2287 | panelp->ackmask = 0xc0; | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | nxtid++; | |
2292 | ioaddr += EREG_BANKSIZE; | |
2293 | brdp->nrports += panelp->nrports; | |
2294 | brdp->panels[panelnr++] = panelp; | |
2295 | if ((brdp->brdtype != BRD_ECHPCI) && | |
2296 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) | |
2297 | break; | |
2298 | } | |
2299 | ||
2300 | brdp->nrpanels = panelnr; | |
2301 | brdp->nrbnks = banknr; | |
2302 | if (brdp->brdtype == BRD_ECH) | |
2303 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); | |
2304 | ||
2305 | brdp->state |= BRD_FOUND; | |
0f2ed4c6 | 2306 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
1da177e4 LT |
2307 | printk("STALLION: failed to register interrupt " |
2308 | "routine for %s irq=%d\n", name, brdp->irq); | |
2309 | i = -ENODEV; | |
2310 | } else { | |
2311 | i = 0; | |
2312 | } | |
2313 | ||
2314 | return(i); | |
2315 | } | |
2316 | ||
2317 | /*****************************************************************************/ | |
2318 | ||
2319 | /* | |
2320 | * Initialize and configure the specified board. | |
2321 | * Scan through all the boards in the configuration and see what we | |
2322 | * can find. Handle EIO and the ECH boards a little differently here | |
2323 | * since the initial search and setup is very different. | |
2324 | */ | |
2325 | ||
ca7ed0f2 | 2326 | static int __init stl_brdinit(struct stlbrd *brdp) |
1da177e4 LT |
2327 | { |
2328 | int i; | |
2329 | ||
a0564e14 | 2330 | pr_debug("stl_brdinit(brdp=%p)\n", brdp); |
1da177e4 LT |
2331 | |
2332 | switch (brdp->brdtype) { | |
2333 | case BRD_EASYIO: | |
2334 | case BRD_EASYIOPCI: | |
2335 | stl_initeio(brdp); | |
2336 | break; | |
2337 | case BRD_ECH: | |
2338 | case BRD_ECHMC: | |
2339 | case BRD_ECHPCI: | |
2340 | case BRD_ECH64PCI: | |
2341 | stl_initech(brdp); | |
2342 | break; | |
2343 | default: | |
2344 | printk("STALLION: board=%d is unknown board type=%d\n", | |
2345 | brdp->brdnr, brdp->brdtype); | |
2346 | return(ENODEV); | |
2347 | } | |
2348 | ||
2349 | stl_brds[brdp->brdnr] = brdp; | |
2350 | if ((brdp->state & BRD_FOUND) == 0) { | |
2351 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", | |
2352 | stl_brdnames[brdp->brdtype], brdp->brdnr, | |
2353 | brdp->ioaddr1, brdp->irq); | |
2354 | return(ENODEV); | |
2355 | } | |
2356 | ||
2357 | for (i = 0; (i < STL_MAXPANELS); i++) | |
615e4a71 | 2358 | if (brdp->panels[i] != NULL) |
1da177e4 LT |
2359 | stl_initports(brdp, brdp->panels[i]); |
2360 | ||
2361 | printk("STALLION: %s found, board=%d io=%x irq=%d " | |
2362 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], | |
2363 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, | |
2364 | brdp->nrports); | |
2365 | return(0); | |
2366 | } | |
2367 | ||
2368 | /*****************************************************************************/ | |
2369 | ||
2370 | /* | |
2371 | * Find the next available board number that is free. | |
2372 | */ | |
2373 | ||
40e82652 | 2374 | static int __init stl_getbrdnr(void) |
1da177e4 LT |
2375 | { |
2376 | int i; | |
2377 | ||
2378 | for (i = 0; (i < STL_MAXBRDS); i++) { | |
615e4a71 | 2379 | if (stl_brds[i] == NULL) { |
1da177e4 LT |
2380 | if (i >= stl_nrbrds) |
2381 | stl_nrbrds = i + 1; | |
2382 | return(i); | |
2383 | } | |
2384 | } | |
2385 | return(-1); | |
2386 | } | |
2387 | ||
b1b84fe0 JS |
2388 | static void stl_cleanup_panels(struct stlbrd *brdp) |
2389 | { | |
2390 | struct stlpanel *panelp; | |
2391 | struct stlport *portp; | |
2392 | unsigned int j, k; | |
1da177e4 | 2393 | |
b1b84fe0 JS |
2394 | for (j = 0; j < STL_MAXPANELS; j++) { |
2395 | panelp = brdp->panels[j]; | |
2396 | if (panelp == NULL) | |
2397 | continue; | |
2398 | for (k = 0; k < STL_PORTSPERPANEL; k++) { | |
2399 | portp = panelp->ports[k]; | |
2400 | if (portp == NULL) | |
2401 | continue; | |
2402 | if (portp->tty != NULL) | |
2403 | stl_hangup(portp->tty); | |
2404 | kfree(portp->tx.buf); | |
2405 | kfree(portp); | |
2406 | } | |
2407 | kfree(panelp); | |
2408 | } | |
2409 | } | |
1da177e4 | 2410 | |
b1b84fe0 | 2411 | /*****************************************************************************/ |
1da177e4 LT |
2412 | /* |
2413 | * We have a Stallion board. Allocate a board structure and | |
2414 | * initialize it. Read its IO and IRQ resources from PCI | |
2415 | * configuration space. | |
2416 | */ | |
2417 | ||
b1b84fe0 JS |
2418 | static int __devinit stl_pciprobe(struct pci_dev *pdev, |
2419 | const struct pci_device_id *ent) | |
1da177e4 | 2420 | { |
b1b84fe0 JS |
2421 | struct stlbrd *brdp; |
2422 | unsigned int brdtype = ent->driver_data; | |
1da177e4 | 2423 | |
a0564e14 | 2424 | pr_debug("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, |
b1b84fe0 JS |
2425 | pdev->bus->number, pdev->devfn); |
2426 | ||
2427 | if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) | |
2428 | return -ENODEV; | |
2429 | ||
2430 | dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n", | |
2431 | pdev->vendor, pdev->device, pdev->class); | |
1da177e4 | 2432 | |
b1b84fe0 | 2433 | if (pci_enable_device(pdev)) |
1da177e4 | 2434 | return(-EIO); |
615e4a71 | 2435 | if ((brdp = stl_allocbrd()) == NULL) |
1da177e4 LT |
2436 | return(-ENOMEM); |
2437 | if ((brdp->brdnr = stl_getbrdnr()) < 0) { | |
2438 | printk("STALLION: too many boards found, " | |
2439 | "maximum supported %d\n", STL_MAXBRDS); | |
2440 | return(0); | |
2441 | } | |
2442 | brdp->brdtype = brdtype; | |
2443 | ||
2444 | /* | |
2445 | * Different Stallion boards use the BAR registers in different ways, | |
2446 | * so set up io addresses based on board type. | |
2447 | */ | |
a0564e14 | 2448 | pr_debug("%s(%d): BAR[]=%Lx,%Lx,%Lx,%Lx IRQ=%x\n", __FILE__, __LINE__, |
b1b84fe0 JS |
2449 | pci_resource_start(pdev, 0), pci_resource_start(pdev, 1), |
2450 | pci_resource_start(pdev, 2), pci_resource_start(pdev, 3), pdev->irq); | |
1da177e4 LT |
2451 | |
2452 | /* | |
2453 | * We have all resources from the board, so let's setup the actual | |
2454 | * board structure now. | |
2455 | */ | |
2456 | switch (brdtype) { | |
2457 | case BRD_ECHPCI: | |
b1b84fe0 JS |
2458 | brdp->ioaddr2 = pci_resource_start(pdev, 0); |
2459 | brdp->ioaddr1 = pci_resource_start(pdev, 1); | |
1da177e4 LT |
2460 | break; |
2461 | case BRD_ECH64PCI: | |
b1b84fe0 JS |
2462 | brdp->ioaddr2 = pci_resource_start(pdev, 2); |
2463 | brdp->ioaddr1 = pci_resource_start(pdev, 1); | |
1da177e4 LT |
2464 | break; |
2465 | case BRD_EASYIOPCI: | |
b1b84fe0 JS |
2466 | brdp->ioaddr1 = pci_resource_start(pdev, 2); |
2467 | brdp->ioaddr2 = pci_resource_start(pdev, 1); | |
1da177e4 LT |
2468 | break; |
2469 | default: | |
2470 | printk("STALLION: unknown PCI board type=%d\n", brdtype); | |
2471 | break; | |
2472 | } | |
2473 | ||
b1b84fe0 | 2474 | brdp->irq = pdev->irq; |
1da177e4 LT |
2475 | stl_brdinit(brdp); |
2476 | ||
b1b84fe0 JS |
2477 | pci_set_drvdata(pdev, brdp); |
2478 | ||
1da177e4 LT |
2479 | return(0); |
2480 | } | |
2481 | ||
b1b84fe0 | 2482 | static void __devexit stl_pciremove(struct pci_dev *pdev) |
1da177e4 | 2483 | { |
b1b84fe0 | 2484 | struct stlbrd *brdp = pci_get_drvdata(pdev); |
1da177e4 | 2485 | |
b1b84fe0 | 2486 | free_irq(brdp->irq, brdp); |
1da177e4 | 2487 | |
b1b84fe0 | 2488 | stl_cleanup_panels(brdp); |
1da177e4 | 2489 | |
b1b84fe0 JS |
2490 | release_region(brdp->ioaddr1, brdp->iosize1); |
2491 | if (brdp->iosize2 > 0) | |
2492 | release_region(brdp->ioaddr2, brdp->iosize2); | |
1da177e4 | 2493 | |
b1b84fe0 JS |
2494 | stl_brds[brdp->brdnr] = NULL; |
2495 | kfree(brdp); | |
1da177e4 LT |
2496 | } |
2497 | ||
b1b84fe0 JS |
2498 | static struct pci_driver stl_pcidriver = { |
2499 | .name = "stallion", | |
2500 | .id_table = stl_pcibrds, | |
2501 | .probe = stl_pciprobe, | |
2502 | .remove = __devexit_p(stl_pciremove) | |
2503 | }; | |
1da177e4 LT |
2504 | |
2505 | /*****************************************************************************/ | |
2506 | ||
2507 | /* | |
2508 | * Scan through all the boards in the configuration and see what we | |
2509 | * can find. Handle EIO and the ECH boards a little differently here | |
2510 | * since the initial search and setup is too different. | |
2511 | */ | |
2512 | ||
40e82652 | 2513 | static int __init stl_initbrds(void) |
1da177e4 | 2514 | { |
ca7ed0f2 JS |
2515 | struct stlbrd *brdp; |
2516 | struct stlconf *confp; | |
1da177e4 LT |
2517 | int i; |
2518 | ||
a0564e14 | 2519 | pr_debug("stl_initbrds()\n"); |
1da177e4 LT |
2520 | |
2521 | if (stl_nrbrds > STL_MAXBRDS) { | |
2522 | printk("STALLION: too many boards in configuration table, " | |
2523 | "truncating to %d\n", STL_MAXBRDS); | |
2524 | stl_nrbrds = STL_MAXBRDS; | |
2525 | } | |
2526 | ||
2527 | /* | |
2528 | * Firstly scan the list of static boards configured. Allocate | |
2529 | * resources and initialize the boards as found. | |
2530 | */ | |
2531 | for (i = 0; (i < stl_nrbrds); i++) { | |
2532 | confp = &stl_brdconf[i]; | |
2533 | stl_parsebrd(confp, stl_brdsp[i]); | |
615e4a71 | 2534 | if ((brdp = stl_allocbrd()) == NULL) |
1da177e4 LT |
2535 | return(-ENOMEM); |
2536 | brdp->brdnr = i; | |
2537 | brdp->brdtype = confp->brdtype; | |
2538 | brdp->ioaddr1 = confp->ioaddr1; | |
2539 | brdp->ioaddr2 = confp->ioaddr2; | |
2540 | brdp->irq = confp->irq; | |
2541 | brdp->irqtype = confp->irqtype; | |
2542 | stl_brdinit(brdp); | |
2543 | } | |
2544 | ||
2545 | /* | |
2546 | * Find any dynamically supported boards. That is via module load | |
2547 | * line options or auto-detected on the PCI bus. | |
2548 | */ | |
2549 | stl_argbrds(); | |
1da177e4 LT |
2550 | |
2551 | return(0); | |
2552 | } | |
2553 | ||
2554 | /*****************************************************************************/ | |
2555 | ||
2556 | /* | |
2557 | * Return the board stats structure to user app. | |
2558 | */ | |
2559 | ||
2560 | static int stl_getbrdstats(combrd_t __user *bp) | |
2561 | { | |
ca7ed0f2 JS |
2562 | struct stlbrd *brdp; |
2563 | struct stlpanel *panelp; | |
1da177e4 LT |
2564 | int i; |
2565 | ||
2566 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) | |
2567 | return -EFAULT; | |
2568 | if (stl_brdstats.brd >= STL_MAXBRDS) | |
2569 | return(-ENODEV); | |
2570 | brdp = stl_brds[stl_brdstats.brd]; | |
615e4a71 | 2571 | if (brdp == NULL) |
1da177e4 LT |
2572 | return(-ENODEV); |
2573 | ||
2574 | memset(&stl_brdstats, 0, sizeof(combrd_t)); | |
2575 | stl_brdstats.brd = brdp->brdnr; | |
2576 | stl_brdstats.type = brdp->brdtype; | |
2577 | stl_brdstats.hwid = brdp->hwid; | |
2578 | stl_brdstats.state = brdp->state; | |
2579 | stl_brdstats.ioaddr = brdp->ioaddr1; | |
2580 | stl_brdstats.ioaddr2 = brdp->ioaddr2; | |
2581 | stl_brdstats.irq = brdp->irq; | |
2582 | stl_brdstats.nrpanels = brdp->nrpanels; | |
2583 | stl_brdstats.nrports = brdp->nrports; | |
2584 | for (i = 0; (i < brdp->nrpanels); i++) { | |
2585 | panelp = brdp->panels[i]; | |
2586 | stl_brdstats.panels[i].panel = i; | |
2587 | stl_brdstats.panels[i].hwid = panelp->hwid; | |
2588 | stl_brdstats.panels[i].nrports = panelp->nrports; | |
2589 | } | |
2590 | ||
2591 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; | |
2592 | } | |
2593 | ||
2594 | /*****************************************************************************/ | |
2595 | ||
2596 | /* | |
2597 | * Resolve the referenced port number into a port struct pointer. | |
2598 | */ | |
2599 | ||
ca7ed0f2 | 2600 | static struct stlport *stl_getport(int brdnr, int panelnr, int portnr) |
1da177e4 | 2601 | { |
ca7ed0f2 JS |
2602 | struct stlbrd *brdp; |
2603 | struct stlpanel *panelp; | |
1da177e4 LT |
2604 | |
2605 | if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) | |
615e4a71 | 2606 | return(NULL); |
1da177e4 | 2607 | brdp = stl_brds[brdnr]; |
615e4a71 JS |
2608 | if (brdp == NULL) |
2609 | return(NULL); | |
1da177e4 | 2610 | if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) |
615e4a71 | 2611 | return(NULL); |
1da177e4 | 2612 | panelp = brdp->panels[panelnr]; |
615e4a71 JS |
2613 | if (panelp == NULL) |
2614 | return(NULL); | |
1da177e4 | 2615 | if ((portnr < 0) || (portnr >= panelp->nrports)) |
615e4a71 | 2616 | return(NULL); |
1da177e4 LT |
2617 | return(panelp->ports[portnr]); |
2618 | } | |
2619 | ||
2620 | /*****************************************************************************/ | |
2621 | ||
2622 | /* | |
2623 | * Return the port stats structure to user app. A NULL port struct | |
2624 | * pointer passed in means that we need to find out from the app | |
2625 | * what port to get stats for (used through board control device). | |
2626 | */ | |
2627 | ||
ca7ed0f2 | 2628 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp) |
1da177e4 LT |
2629 | { |
2630 | unsigned char *head, *tail; | |
2631 | unsigned long flags; | |
2632 | ||
2633 | if (!portp) { | |
2634 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) | |
2635 | return -EFAULT; | |
2636 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, | |
2637 | stl_comstats.port); | |
615e4a71 | 2638 | if (portp == NULL) |
1da177e4 LT |
2639 | return(-ENODEV); |
2640 | } | |
2641 | ||
2642 | portp->stats.state = portp->istate; | |
2643 | portp->stats.flags = portp->flags; | |
2644 | portp->stats.hwid = portp->hwid; | |
2645 | ||
2646 | portp->stats.ttystate = 0; | |
2647 | portp->stats.cflags = 0; | |
2648 | portp->stats.iflags = 0; | |
2649 | portp->stats.oflags = 0; | |
2650 | portp->stats.lflags = 0; | |
2651 | portp->stats.rxbuffered = 0; | |
2652 | ||
b65b5b59 | 2653 | spin_lock_irqsave(&stallion_lock, flags); |
615e4a71 | 2654 | if (portp->tty != NULL) { |
1da177e4 LT |
2655 | if (portp->tty->driver_data == portp) { |
2656 | portp->stats.ttystate = portp->tty->flags; | |
33f0f88f AC |
2657 | /* No longer available as a statistic */ |
2658 | portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ | |
615e4a71 | 2659 | if (portp->tty->termios != NULL) { |
1da177e4 LT |
2660 | portp->stats.cflags = portp->tty->termios->c_cflag; |
2661 | portp->stats.iflags = portp->tty->termios->c_iflag; | |
2662 | portp->stats.oflags = portp->tty->termios->c_oflag; | |
2663 | portp->stats.lflags = portp->tty->termios->c_lflag; | |
2664 | } | |
2665 | } | |
2666 | } | |
b65b5b59 | 2667 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
2668 | |
2669 | head = portp->tx.head; | |
2670 | tail = portp->tx.tail; | |
2671 | portp->stats.txbuffered = ((head >= tail) ? (head - tail) : | |
2672 | (STL_TXBUFSIZE - (tail - head))); | |
2673 | ||
2674 | portp->stats.signals = (unsigned long) stl_getsignals(portp); | |
2675 | ||
2676 | return copy_to_user(cp, &portp->stats, | |
2677 | sizeof(comstats_t)) ? -EFAULT : 0; | |
2678 | } | |
2679 | ||
2680 | /*****************************************************************************/ | |
2681 | ||
2682 | /* | |
2683 | * Clear the port stats structure. We also return it zeroed out... | |
2684 | */ | |
2685 | ||
ca7ed0f2 | 2686 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp) |
1da177e4 LT |
2687 | { |
2688 | if (!portp) { | |
2689 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) | |
2690 | return -EFAULT; | |
2691 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, | |
2692 | stl_comstats.port); | |
615e4a71 | 2693 | if (portp == NULL) |
1da177e4 LT |
2694 | return(-ENODEV); |
2695 | } | |
2696 | ||
2697 | memset(&portp->stats, 0, sizeof(comstats_t)); | |
2698 | portp->stats.brd = portp->brdnr; | |
2699 | portp->stats.panel = portp->panelnr; | |
2700 | portp->stats.port = portp->portnr; | |
2701 | return copy_to_user(cp, &portp->stats, | |
2702 | sizeof(comstats_t)) ? -EFAULT : 0; | |
2703 | } | |
2704 | ||
2705 | /*****************************************************************************/ | |
2706 | ||
2707 | /* | |
2708 | * Return the entire driver ports structure to a user app. | |
2709 | */ | |
2710 | ||
ca7ed0f2 | 2711 | static int stl_getportstruct(struct stlport __user *arg) |
1da177e4 | 2712 | { |
ca7ed0f2 | 2713 | struct stlport *portp; |
1da177e4 | 2714 | |
ca7ed0f2 | 2715 | if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport))) |
1da177e4 LT |
2716 | return -EFAULT; |
2717 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, | |
2718 | stl_dummyport.portnr); | |
2719 | if (!portp) | |
2720 | return -ENODEV; | |
ca7ed0f2 | 2721 | return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0; |
1da177e4 LT |
2722 | } |
2723 | ||
2724 | /*****************************************************************************/ | |
2725 | ||
2726 | /* | |
2727 | * Return the entire driver board structure to a user app. | |
2728 | */ | |
2729 | ||
ca7ed0f2 | 2730 | static int stl_getbrdstruct(struct stlbrd __user *arg) |
1da177e4 | 2731 | { |
ca7ed0f2 | 2732 | struct stlbrd *brdp; |
1da177e4 | 2733 | |
ca7ed0f2 | 2734 | if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd))) |
1da177e4 LT |
2735 | return -EFAULT; |
2736 | if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) | |
2737 | return -ENODEV; | |
2738 | brdp = stl_brds[stl_dummybrd.brdnr]; | |
2739 | if (!brdp) | |
2740 | return(-ENODEV); | |
ca7ed0f2 | 2741 | return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0; |
1da177e4 LT |
2742 | } |
2743 | ||
2744 | /*****************************************************************************/ | |
2745 | ||
2746 | /* | |
2747 | * The "staliomem" device is also required to do some special operations | |
2748 | * on the board and/or ports. In this driver it is mostly used for stats | |
2749 | * collection. | |
2750 | */ | |
2751 | ||
2752 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) | |
2753 | { | |
2754 | int brdnr, rc; | |
2755 | void __user *argp = (void __user *)arg; | |
2756 | ||
a0564e14 | 2757 | pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg); |
1da177e4 LT |
2758 | |
2759 | brdnr = iminor(ip); | |
2760 | if (brdnr >= STL_MAXBRDS) | |
2761 | return(-ENODEV); | |
2762 | rc = 0; | |
2763 | ||
2764 | switch (cmd) { | |
2765 | case COM_GETPORTSTATS: | |
2766 | rc = stl_getportstats(NULL, argp); | |
2767 | break; | |
2768 | case COM_CLRPORTSTATS: | |
2769 | rc = stl_clrportstats(NULL, argp); | |
2770 | break; | |
2771 | case COM_GETBRDSTATS: | |
2772 | rc = stl_getbrdstats(argp); | |
2773 | break; | |
2774 | case COM_READPORT: | |
2775 | rc = stl_getportstruct(argp); | |
2776 | break; | |
2777 | case COM_READBOARD: | |
2778 | rc = stl_getbrdstruct(argp); | |
2779 | break; | |
2780 | default: | |
2781 | rc = -ENOIOCTLCMD; | |
2782 | break; | |
2783 | } | |
2784 | ||
2785 | return(rc); | |
2786 | } | |
2787 | ||
b68e31d0 | 2788 | static const struct tty_operations stl_ops = { |
1da177e4 LT |
2789 | .open = stl_open, |
2790 | .close = stl_close, | |
2791 | .write = stl_write, | |
2792 | .put_char = stl_putchar, | |
2793 | .flush_chars = stl_flushchars, | |
2794 | .write_room = stl_writeroom, | |
2795 | .chars_in_buffer = stl_charsinbuffer, | |
2796 | .ioctl = stl_ioctl, | |
2797 | .set_termios = stl_settermios, | |
2798 | .throttle = stl_throttle, | |
2799 | .unthrottle = stl_unthrottle, | |
2800 | .stop = stl_stop, | |
2801 | .start = stl_start, | |
2802 | .hangup = stl_hangup, | |
2803 | .flush_buffer = stl_flushbuffer, | |
2804 | .break_ctl = stl_breakctl, | |
2805 | .wait_until_sent = stl_waituntilsent, | |
2806 | .send_xchar = stl_sendxchar, | |
2807 | .read_proc = stl_readproc, | |
2808 | .tiocmget = stl_tiocmget, | |
2809 | .tiocmset = stl_tiocmset, | |
2810 | }; | |
2811 | ||
1da177e4 LT |
2812 | /*****************************************************************************/ |
2813 | /* CD1400 HARDWARE FUNCTIONS */ | |
2814 | /*****************************************************************************/ | |
2815 | ||
2816 | /* | |
2817 | * These functions get/set/update the registers of the cd1400 UARTs. | |
2818 | * Access to the cd1400 registers is via an address/data io port pair. | |
2819 | * (Maybe should make this inline...) | |
2820 | */ | |
2821 | ||
ca7ed0f2 | 2822 | static int stl_cd1400getreg(struct stlport *portp, int regnr) |
1da177e4 LT |
2823 | { |
2824 | outb((regnr + portp->uartaddr), portp->ioaddr); | |
014c2544 | 2825 | return inb(portp->ioaddr + EREG_DATA); |
1da177e4 LT |
2826 | } |
2827 | ||
ca7ed0f2 | 2828 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
2829 | { |
2830 | outb((regnr + portp->uartaddr), portp->ioaddr); | |
2831 | outb(value, portp->ioaddr + EREG_DATA); | |
2832 | } | |
2833 | ||
ca7ed0f2 | 2834 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
2835 | { |
2836 | outb((regnr + portp->uartaddr), portp->ioaddr); | |
2837 | if (inb(portp->ioaddr + EREG_DATA) != value) { | |
2838 | outb(value, portp->ioaddr + EREG_DATA); | |
014c2544 | 2839 | return 1; |
1da177e4 | 2840 | } |
014c2544 | 2841 | return 0; |
1da177e4 LT |
2842 | } |
2843 | ||
2844 | /*****************************************************************************/ | |
2845 | ||
2846 | /* | |
2847 | * Inbitialize the UARTs in a panel. We don't care what sort of board | |
2848 | * these ports are on - since the port io registers are almost | |
2849 | * identical when dealing with ports. | |
2850 | */ | |
2851 | ||
ca7ed0f2 | 2852 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
1da177e4 LT |
2853 | { |
2854 | unsigned int gfrcr; | |
2855 | int chipmask, i, j; | |
2856 | int nrchips, uartaddr, ioaddr; | |
b65b5b59 | 2857 | unsigned long flags; |
1da177e4 | 2858 | |
a0564e14 | 2859 | pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
1da177e4 | 2860 | |
b65b5b59 | 2861 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
2862 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
2863 | ||
2864 | /* | |
2865 | * Check that each chip is present and started up OK. | |
2866 | */ | |
2867 | chipmask = 0; | |
2868 | nrchips = panelp->nrports / CD1400_PORTS; | |
2869 | for (i = 0; (i < nrchips); i++) { | |
2870 | if (brdp->brdtype == BRD_ECHPCI) { | |
2871 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); | |
2872 | ioaddr = panelp->iobase; | |
2873 | } else { | |
2874 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); | |
2875 | } | |
2876 | uartaddr = (i & 0x01) ? 0x080 : 0; | |
2877 | outb((GFRCR + uartaddr), ioaddr); | |
2878 | outb(0, (ioaddr + EREG_DATA)); | |
2879 | outb((CCR + uartaddr), ioaddr); | |
2880 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); | |
2881 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); | |
2882 | outb((GFRCR + uartaddr), ioaddr); | |
2883 | for (j = 0; (j < CCR_MAXWAIT); j++) { | |
2884 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) | |
2885 | break; | |
2886 | } | |
2887 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { | |
2888 | printk("STALLION: cd1400 not responding, " | |
2889 | "brd=%d panel=%d chip=%d\n", | |
2890 | panelp->brdnr, panelp->panelnr, i); | |
2891 | continue; | |
2892 | } | |
2893 | chipmask |= (0x1 << i); | |
2894 | outb((PPR + uartaddr), ioaddr); | |
2895 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); | |
2896 | } | |
2897 | ||
2898 | BRDDISABLE(panelp->brdnr); | |
b65b5b59 | 2899 | spin_unlock_irqrestore(&brd_lock, flags); |
014c2544 | 2900 | return chipmask; |
1da177e4 LT |
2901 | } |
2902 | ||
2903 | /*****************************************************************************/ | |
2904 | ||
2905 | /* | |
2906 | * Initialize hardware specific port registers. | |
2907 | */ | |
2908 | ||
ca7ed0f2 | 2909 | static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
1da177e4 | 2910 | { |
b65b5b59 | 2911 | unsigned long flags; |
a0564e14 JS |
2912 | pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
2913 | panelp, portp); | |
1da177e4 | 2914 | |
615e4a71 JS |
2915 | if ((brdp == NULL) || (panelp == NULL) || |
2916 | (portp == NULL)) | |
1da177e4 LT |
2917 | return; |
2918 | ||
b65b5b59 | 2919 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
2920 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
2921 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); | |
2922 | portp->uartaddr = (portp->portnr & 0x04) << 5; | |
2923 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); | |
2924 | ||
2925 | BRDENABLE(portp->brdnr, portp->pagenr); | |
2926 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
2927 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); | |
2928 | portp->hwid = stl_cd1400getreg(portp, GFRCR); | |
2929 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 2930 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
2931 | } |
2932 | ||
2933 | /*****************************************************************************/ | |
2934 | ||
2935 | /* | |
2936 | * Wait for the command register to be ready. We will poll this, | |
2937 | * since it won't usually take too long to be ready. | |
2938 | */ | |
2939 | ||
ca7ed0f2 | 2940 | static void stl_cd1400ccrwait(struct stlport *portp) |
1da177e4 LT |
2941 | { |
2942 | int i; | |
2943 | ||
2944 | for (i = 0; (i < CCR_MAXWAIT); i++) { | |
2945 | if (stl_cd1400getreg(portp, CCR) == 0) { | |
2946 | return; | |
2947 | } | |
2948 | } | |
2949 | ||
2950 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", | |
2951 | portp->portnr, portp->panelnr, portp->brdnr); | |
2952 | } | |
2953 | ||
2954 | /*****************************************************************************/ | |
2955 | ||
2956 | /* | |
2957 | * Set up the cd1400 registers for a port based on the termios port | |
2958 | * settings. | |
2959 | */ | |
2960 | ||
606d099c | 2961 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp) |
1da177e4 | 2962 | { |
ca7ed0f2 | 2963 | struct stlbrd *brdp; |
1da177e4 LT |
2964 | unsigned long flags; |
2965 | unsigned int clkdiv, baudrate; | |
2966 | unsigned char cor1, cor2, cor3; | |
2967 | unsigned char cor4, cor5, ccr; | |
2968 | unsigned char srer, sreron, sreroff; | |
2969 | unsigned char mcor1, mcor2, rtpr; | |
2970 | unsigned char clk, div; | |
2971 | ||
2972 | cor1 = 0; | |
2973 | cor2 = 0; | |
2974 | cor3 = 0; | |
2975 | cor4 = 0; | |
2976 | cor5 = 0; | |
2977 | ccr = 0; | |
2978 | rtpr = 0; | |
2979 | clk = 0; | |
2980 | div = 0; | |
2981 | mcor1 = 0; | |
2982 | mcor2 = 0; | |
2983 | sreron = 0; | |
2984 | sreroff = 0; | |
2985 | ||
2986 | brdp = stl_brds[portp->brdnr]; | |
615e4a71 | 2987 | if (brdp == NULL) |
1da177e4 LT |
2988 | return; |
2989 | ||
2990 | /* | |
2991 | * Set up the RX char ignore mask with those RX error types we | |
2992 | * can ignore. We can get the cd1400 to help us out a little here, | |
2993 | * it will ignore parity errors and breaks for us. | |
2994 | */ | |
2995 | portp->rxignoremsk = 0; | |
2996 | if (tiosp->c_iflag & IGNPAR) { | |
2997 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); | |
2998 | cor1 |= COR1_PARIGNORE; | |
2999 | } | |
3000 | if (tiosp->c_iflag & IGNBRK) { | |
3001 | portp->rxignoremsk |= ST_BREAK; | |
3002 | cor4 |= COR4_IGNBRK; | |
3003 | } | |
3004 | ||
3005 | portp->rxmarkmsk = ST_OVERRUN; | |
3006 | if (tiosp->c_iflag & (INPCK | PARMRK)) | |
3007 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); | |
3008 | if (tiosp->c_iflag & BRKINT) | |
3009 | portp->rxmarkmsk |= ST_BREAK; | |
3010 | ||
3011 | /* | |
3012 | * Go through the char size, parity and stop bits and set all the | |
3013 | * option register appropriately. | |
3014 | */ | |
3015 | switch (tiosp->c_cflag & CSIZE) { | |
3016 | case CS5: | |
3017 | cor1 |= COR1_CHL5; | |
3018 | break; | |
3019 | case CS6: | |
3020 | cor1 |= COR1_CHL6; | |
3021 | break; | |
3022 | case CS7: | |
3023 | cor1 |= COR1_CHL7; | |
3024 | break; | |
3025 | default: | |
3026 | cor1 |= COR1_CHL8; | |
3027 | break; | |
3028 | } | |
3029 | ||
3030 | if (tiosp->c_cflag & CSTOPB) | |
3031 | cor1 |= COR1_STOP2; | |
3032 | else | |
3033 | cor1 |= COR1_STOP1; | |
3034 | ||
3035 | if (tiosp->c_cflag & PARENB) { | |
3036 | if (tiosp->c_cflag & PARODD) | |
3037 | cor1 |= (COR1_PARENB | COR1_PARODD); | |
3038 | else | |
3039 | cor1 |= (COR1_PARENB | COR1_PAREVEN); | |
3040 | } else { | |
3041 | cor1 |= COR1_PARNONE; | |
3042 | } | |
3043 | ||
3044 | /* | |
3045 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing | |
3046 | * space for hardware flow control and the like. This should be set to | |
3047 | * VMIN. Also here we will set the RX data timeout to 10ms - this should | |
3048 | * really be based on VTIME. | |
3049 | */ | |
3050 | cor3 |= FIFO_RXTHRESHOLD; | |
3051 | rtpr = 2; | |
3052 | ||
3053 | /* | |
3054 | * Calculate the baud rate timers. For now we will just assume that | |
3055 | * the input and output baud are the same. Could have used a baud | |
3056 | * table here, but this way we can generate virtually any baud rate | |
3057 | * we like! | |
3058 | */ | |
3059 | baudrate = tiosp->c_cflag & CBAUD; | |
3060 | if (baudrate & CBAUDEX) { | |
3061 | baudrate &= ~CBAUDEX; | |
3062 | if ((baudrate < 1) || (baudrate > 4)) | |
3063 | tiosp->c_cflag &= ~CBAUDEX; | |
3064 | else | |
3065 | baudrate += 15; | |
3066 | } | |
3067 | baudrate = stl_baudrates[baudrate]; | |
3068 | if ((tiosp->c_cflag & CBAUD) == B38400) { | |
3069 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
3070 | baudrate = 57600; | |
3071 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
3072 | baudrate = 115200; | |
3073 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) | |
3074 | baudrate = 230400; | |
3075 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
3076 | baudrate = 460800; | |
3077 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) | |
3078 | baudrate = (portp->baud_base / portp->custom_divisor); | |
3079 | } | |
3080 | if (baudrate > STL_CD1400MAXBAUD) | |
3081 | baudrate = STL_CD1400MAXBAUD; | |
3082 | ||
3083 | if (baudrate > 0) { | |
3084 | for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { | |
3085 | clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); | |
3086 | if (clkdiv < 0x100) | |
3087 | break; | |
3088 | } | |
3089 | div = (unsigned char) clkdiv; | |
3090 | } | |
3091 | ||
3092 | /* | |
3093 | * Check what form of modem signaling is required and set it up. | |
3094 | */ | |
3095 | if ((tiosp->c_cflag & CLOCAL) == 0) { | |
3096 | mcor1 |= MCOR1_DCD; | |
3097 | mcor2 |= MCOR2_DCD; | |
3098 | sreron |= SRER_MODEM; | |
3099 | portp->flags |= ASYNC_CHECK_CD; | |
3100 | } else { | |
3101 | portp->flags &= ~ASYNC_CHECK_CD; | |
3102 | } | |
3103 | ||
3104 | /* | |
3105 | * Setup cd1400 enhanced modes if we can. In particular we want to | |
3106 | * handle as much of the flow control as possible automatically. As | |
3107 | * well as saving a few CPU cycles it will also greatly improve flow | |
3108 | * control reliability. | |
3109 | */ | |
3110 | if (tiosp->c_iflag & IXON) { | |
3111 | cor2 |= COR2_TXIBE; | |
3112 | cor3 |= COR3_SCD12; | |
3113 | if (tiosp->c_iflag & IXANY) | |
3114 | cor2 |= COR2_IXM; | |
3115 | } | |
3116 | ||
3117 | if (tiosp->c_cflag & CRTSCTS) { | |
3118 | cor2 |= COR2_CTSAE; | |
3119 | mcor1 |= FIFO_RTSTHRESHOLD; | |
3120 | } | |
3121 | ||
3122 | /* | |
3123 | * All cd1400 register values calculated so go through and set | |
3124 | * them all up. | |
3125 | */ | |
3126 | ||
a0564e14 | 3127 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
1da177e4 | 3128 | portp->portnr, portp->panelnr, portp->brdnr); |
a0564e14 | 3129 | pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", |
1da177e4 | 3130 | cor1, cor2, cor3, cor4, cor5); |
a0564e14 | 3131 | pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", |
1da177e4 | 3132 | mcor1, mcor2, rtpr, sreron, sreroff); |
a0564e14 JS |
3133 | pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
3134 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", | |
1da177e4 LT |
3135 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
3136 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); | |
1da177e4 | 3137 | |
b65b5b59 | 3138 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3139 | BRDENABLE(portp->brdnr, portp->pagenr); |
3140 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); | |
3141 | srer = stl_cd1400getreg(portp, SRER); | |
3142 | stl_cd1400setreg(portp, SRER, 0); | |
3143 | if (stl_cd1400updatereg(portp, COR1, cor1)) | |
3144 | ccr = 1; | |
3145 | if (stl_cd1400updatereg(portp, COR2, cor2)) | |
3146 | ccr = 1; | |
3147 | if (stl_cd1400updatereg(portp, COR3, cor3)) | |
3148 | ccr = 1; | |
3149 | if (ccr) { | |
3150 | stl_cd1400ccrwait(portp); | |
3151 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); | |
3152 | } | |
3153 | stl_cd1400setreg(portp, COR4, cor4); | |
3154 | stl_cd1400setreg(portp, COR5, cor5); | |
3155 | stl_cd1400setreg(portp, MCOR1, mcor1); | |
3156 | stl_cd1400setreg(portp, MCOR2, mcor2); | |
3157 | if (baudrate > 0) { | |
3158 | stl_cd1400setreg(portp, TCOR, clk); | |
3159 | stl_cd1400setreg(portp, TBPR, div); | |
3160 | stl_cd1400setreg(portp, RCOR, clk); | |
3161 | stl_cd1400setreg(portp, RBPR, div); | |
3162 | } | |
3163 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); | |
3164 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); | |
3165 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); | |
3166 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); | |
3167 | stl_cd1400setreg(portp, RTPR, rtpr); | |
3168 | mcor1 = stl_cd1400getreg(portp, MSVR1); | |
3169 | if (mcor1 & MSVR1_DCD) | |
3170 | portp->sigs |= TIOCM_CD; | |
3171 | else | |
3172 | portp->sigs &= ~TIOCM_CD; | |
3173 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); | |
3174 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3175 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3176 | } |
3177 | ||
3178 | /*****************************************************************************/ | |
3179 | ||
3180 | /* | |
3181 | * Set the state of the DTR and RTS signals. | |
3182 | */ | |
3183 | ||
ca7ed0f2 | 3184 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts) |
1da177e4 LT |
3185 | { |
3186 | unsigned char msvr1, msvr2; | |
3187 | unsigned long flags; | |
3188 | ||
a0564e14 JS |
3189 | pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n", |
3190 | portp, dtr, rts); | |
1da177e4 LT |
3191 | |
3192 | msvr1 = 0; | |
3193 | msvr2 = 0; | |
3194 | if (dtr > 0) | |
3195 | msvr1 = MSVR1_DTR; | |
3196 | if (rts > 0) | |
3197 | msvr2 = MSVR2_RTS; | |
3198 | ||
b65b5b59 | 3199 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3200 | BRDENABLE(portp->brdnr, portp->pagenr); |
3201 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3202 | if (rts >= 0) | |
3203 | stl_cd1400setreg(portp, MSVR2, msvr2); | |
3204 | if (dtr >= 0) | |
3205 | stl_cd1400setreg(portp, MSVR1, msvr1); | |
3206 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3207 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3208 | } |
3209 | ||
3210 | /*****************************************************************************/ | |
3211 | ||
3212 | /* | |
3213 | * Return the state of the signals. | |
3214 | */ | |
3215 | ||
ca7ed0f2 | 3216 | static int stl_cd1400getsignals(struct stlport *portp) |
1da177e4 LT |
3217 | { |
3218 | unsigned char msvr1, msvr2; | |
3219 | unsigned long flags; | |
3220 | int sigs; | |
3221 | ||
a0564e14 | 3222 | pr_debug("stl_cd1400getsignals(portp=%p)\n", portp); |
1da177e4 | 3223 | |
b65b5b59 | 3224 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3225 | BRDENABLE(portp->brdnr, portp->pagenr); |
3226 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3227 | msvr1 = stl_cd1400getreg(portp, MSVR1); | |
3228 | msvr2 = stl_cd1400getreg(portp, MSVR2); | |
3229 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3230 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3231 | |
3232 | sigs = 0; | |
3233 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; | |
3234 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; | |
3235 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; | |
3236 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; | |
3237 | #if 0 | |
3238 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; | |
3239 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; | |
3240 | #else | |
3241 | sigs |= TIOCM_DSR; | |
3242 | #endif | |
014c2544 | 3243 | return sigs; |
1da177e4 LT |
3244 | } |
3245 | ||
3246 | /*****************************************************************************/ | |
3247 | ||
3248 | /* | |
3249 | * Enable/Disable the Transmitter and/or Receiver. | |
3250 | */ | |
3251 | ||
ca7ed0f2 | 3252 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
3253 | { |
3254 | unsigned char ccr; | |
3255 | unsigned long flags; | |
3256 | ||
a0564e14 JS |
3257 | pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
3258 | ||
1da177e4 LT |
3259 | ccr = 0; |
3260 | ||
3261 | if (tx == 0) | |
3262 | ccr |= CCR_TXDISABLE; | |
3263 | else if (tx > 0) | |
3264 | ccr |= CCR_TXENABLE; | |
3265 | if (rx == 0) | |
3266 | ccr |= CCR_RXDISABLE; | |
3267 | else if (rx > 0) | |
3268 | ccr |= CCR_RXENABLE; | |
3269 | ||
b65b5b59 | 3270 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3271 | BRDENABLE(portp->brdnr, portp->pagenr); |
3272 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3273 | stl_cd1400ccrwait(portp); | |
3274 | stl_cd1400setreg(portp, CCR, ccr); | |
3275 | stl_cd1400ccrwait(portp); | |
3276 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3277 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3278 | } |
3279 | ||
3280 | /*****************************************************************************/ | |
3281 | ||
3282 | /* | |
3283 | * Start/stop the Transmitter and/or Receiver. | |
3284 | */ | |
3285 | ||
ca7ed0f2 | 3286 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
3287 | { |
3288 | unsigned char sreron, sreroff; | |
3289 | unsigned long flags; | |
3290 | ||
a0564e14 | 3291 | pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
1da177e4 LT |
3292 | |
3293 | sreron = 0; | |
3294 | sreroff = 0; | |
3295 | if (tx == 0) | |
3296 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); | |
3297 | else if (tx == 1) | |
3298 | sreron |= SRER_TXDATA; | |
3299 | else if (tx >= 2) | |
3300 | sreron |= SRER_TXEMPTY; | |
3301 | if (rx == 0) | |
3302 | sreroff |= SRER_RXDATA; | |
3303 | else if (rx > 0) | |
3304 | sreron |= SRER_RXDATA; | |
3305 | ||
b65b5b59 | 3306 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3307 | BRDENABLE(portp->brdnr, portp->pagenr); |
3308 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3309 | stl_cd1400setreg(portp, SRER, | |
3310 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); | |
3311 | BRDDISABLE(portp->brdnr); | |
3312 | if (tx > 0) | |
3313 | set_bit(ASYI_TXBUSY, &portp->istate); | |
b65b5b59 | 3314 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3315 | } |
3316 | ||
3317 | /*****************************************************************************/ | |
3318 | ||
3319 | /* | |
3320 | * Disable all interrupts from this port. | |
3321 | */ | |
3322 | ||
ca7ed0f2 | 3323 | static void stl_cd1400disableintrs(struct stlport *portp) |
1da177e4 LT |
3324 | { |
3325 | unsigned long flags; | |
3326 | ||
a0564e14 JS |
3327 | pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp); |
3328 | ||
b65b5b59 | 3329 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3330 | BRDENABLE(portp->brdnr, portp->pagenr); |
3331 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3332 | stl_cd1400setreg(portp, SRER, 0); | |
3333 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3334 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3335 | } |
3336 | ||
3337 | /*****************************************************************************/ | |
3338 | ||
ca7ed0f2 | 3339 | static void stl_cd1400sendbreak(struct stlport *portp, int len) |
1da177e4 LT |
3340 | { |
3341 | unsigned long flags; | |
3342 | ||
a0564e14 | 3343 | pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len); |
1da177e4 | 3344 | |
b65b5b59 | 3345 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3346 | BRDENABLE(portp->brdnr, portp->pagenr); |
3347 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3348 | stl_cd1400setreg(portp, SRER, | |
3349 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | | |
3350 | SRER_TXEMPTY)); | |
3351 | BRDDISABLE(portp->brdnr); | |
3352 | portp->brklen = len; | |
3353 | if (len == 1) | |
3354 | portp->stats.txbreaks++; | |
b65b5b59 | 3355 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3356 | } |
3357 | ||
3358 | /*****************************************************************************/ | |
3359 | ||
3360 | /* | |
3361 | * Take flow control actions... | |
3362 | */ | |
3363 | ||
ca7ed0f2 | 3364 | static void stl_cd1400flowctrl(struct stlport *portp, int state) |
1da177e4 LT |
3365 | { |
3366 | struct tty_struct *tty; | |
3367 | unsigned long flags; | |
3368 | ||
a0564e14 | 3369 | pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 3370 | |
615e4a71 | 3371 | if (portp == NULL) |
1da177e4 LT |
3372 | return; |
3373 | tty = portp->tty; | |
615e4a71 | 3374 | if (tty == NULL) |
1da177e4 LT |
3375 | return; |
3376 | ||
b65b5b59 | 3377 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3378 | BRDENABLE(portp->brdnr, portp->pagenr); |
3379 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3380 | ||
3381 | if (state) { | |
3382 | if (tty->termios->c_iflag & IXOFF) { | |
3383 | stl_cd1400ccrwait(portp); | |
3384 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); | |
3385 | portp->stats.rxxon++; | |
3386 | stl_cd1400ccrwait(portp); | |
3387 | } | |
3388 | /* | |
3389 | * Question: should we return RTS to what it was before? It may | |
3390 | * have been set by an ioctl... Suppose not, since if you have | |
3391 | * hardware flow control set then it is pretty silly to go and | |
3392 | * set the RTS line by hand. | |
3393 | */ | |
3394 | if (tty->termios->c_cflag & CRTSCTS) { | |
3395 | stl_cd1400setreg(portp, MCOR1, | |
3396 | (stl_cd1400getreg(portp, MCOR1) | | |
3397 | FIFO_RTSTHRESHOLD)); | |
3398 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); | |
3399 | portp->stats.rxrtson++; | |
3400 | } | |
3401 | } else { | |
3402 | if (tty->termios->c_iflag & IXOFF) { | |
3403 | stl_cd1400ccrwait(portp); | |
3404 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); | |
3405 | portp->stats.rxxoff++; | |
3406 | stl_cd1400ccrwait(portp); | |
3407 | } | |
3408 | if (tty->termios->c_cflag & CRTSCTS) { | |
3409 | stl_cd1400setreg(portp, MCOR1, | |
3410 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); | |
3411 | stl_cd1400setreg(portp, MSVR2, 0); | |
3412 | portp->stats.rxrtsoff++; | |
3413 | } | |
3414 | } | |
3415 | ||
3416 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3417 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3418 | } |
3419 | ||
3420 | /*****************************************************************************/ | |
3421 | ||
3422 | /* | |
3423 | * Send a flow control character... | |
3424 | */ | |
3425 | ||
ca7ed0f2 | 3426 | static void stl_cd1400sendflow(struct stlport *portp, int state) |
1da177e4 LT |
3427 | { |
3428 | struct tty_struct *tty; | |
3429 | unsigned long flags; | |
3430 | ||
a0564e14 | 3431 | pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 3432 | |
615e4a71 | 3433 | if (portp == NULL) |
1da177e4 LT |
3434 | return; |
3435 | tty = portp->tty; | |
615e4a71 | 3436 | if (tty == NULL) |
1da177e4 LT |
3437 | return; |
3438 | ||
b65b5b59 | 3439 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3440 | BRDENABLE(portp->brdnr, portp->pagenr); |
3441 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3442 | if (state) { | |
3443 | stl_cd1400ccrwait(portp); | |
3444 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); | |
3445 | portp->stats.rxxon++; | |
3446 | stl_cd1400ccrwait(portp); | |
3447 | } else { | |
3448 | stl_cd1400ccrwait(portp); | |
3449 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); | |
3450 | portp->stats.rxxoff++; | |
3451 | stl_cd1400ccrwait(portp); | |
3452 | } | |
3453 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3454 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3455 | } |
3456 | ||
3457 | /*****************************************************************************/ | |
3458 | ||
ca7ed0f2 | 3459 | static void stl_cd1400flush(struct stlport *portp) |
1da177e4 LT |
3460 | { |
3461 | unsigned long flags; | |
3462 | ||
a0564e14 | 3463 | pr_debug("stl_cd1400flush(portp=%p)\n", portp); |
1da177e4 | 3464 | |
615e4a71 | 3465 | if (portp == NULL) |
1da177e4 LT |
3466 | return; |
3467 | ||
b65b5b59 | 3468 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3469 | BRDENABLE(portp->brdnr, portp->pagenr); |
3470 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3471 | stl_cd1400ccrwait(portp); | |
3472 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); | |
3473 | stl_cd1400ccrwait(portp); | |
3474 | portp->tx.tail = portp->tx.head; | |
3475 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3476 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3477 | } |
3478 | ||
3479 | /*****************************************************************************/ | |
3480 | ||
3481 | /* | |
3482 | * Return the current state of data flow on this port. This is only | |
3483 | * really interresting when determining if data has fully completed | |
3484 | * transmission or not... This is easy for the cd1400, it accurately | |
3485 | * maintains the busy port flag. | |
3486 | */ | |
3487 | ||
ca7ed0f2 | 3488 | static int stl_cd1400datastate(struct stlport *portp) |
1da177e4 | 3489 | { |
a0564e14 | 3490 | pr_debug("stl_cd1400datastate(portp=%p)\n", portp); |
1da177e4 | 3491 | |
615e4a71 | 3492 | if (portp == NULL) |
014c2544 | 3493 | return 0; |
1da177e4 | 3494 | |
014c2544 | 3495 | return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
1da177e4 LT |
3496 | } |
3497 | ||
3498 | /*****************************************************************************/ | |
3499 | ||
3500 | /* | |
3501 | * Interrupt service routine for cd1400 EasyIO boards. | |
3502 | */ | |
3503 | ||
ca7ed0f2 | 3504 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase) |
1da177e4 LT |
3505 | { |
3506 | unsigned char svrtype; | |
3507 | ||
a0564e14 | 3508 | pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase); |
1da177e4 | 3509 | |
b65b5b59 | 3510 | spin_lock(&brd_lock); |
1da177e4 LT |
3511 | outb(SVRR, iobase); |
3512 | svrtype = inb(iobase + EREG_DATA); | |
3513 | if (panelp->nrports > 4) { | |
3514 | outb((SVRR + 0x80), iobase); | |
3515 | svrtype |= inb(iobase + EREG_DATA); | |
3516 | } | |
3517 | ||
3518 | if (svrtype & SVRR_RX) | |
3519 | stl_cd1400rxisr(panelp, iobase); | |
3520 | else if (svrtype & SVRR_TX) | |
3521 | stl_cd1400txisr(panelp, iobase); | |
3522 | else if (svrtype & SVRR_MDM) | |
3523 | stl_cd1400mdmisr(panelp, iobase); | |
b65b5b59 AC |
3524 | |
3525 | spin_unlock(&brd_lock); | |
1da177e4 LT |
3526 | } |
3527 | ||
3528 | /*****************************************************************************/ | |
3529 | ||
3530 | /* | |
3531 | * Interrupt service routine for cd1400 panels. | |
3532 | */ | |
3533 | ||
ca7ed0f2 | 3534 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase) |
1da177e4 LT |
3535 | { |
3536 | unsigned char svrtype; | |
3537 | ||
a0564e14 | 3538 | pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase); |
1da177e4 LT |
3539 | |
3540 | outb(SVRR, iobase); | |
3541 | svrtype = inb(iobase + EREG_DATA); | |
3542 | outb((SVRR + 0x80), iobase); | |
3543 | svrtype |= inb(iobase + EREG_DATA); | |
3544 | if (svrtype & SVRR_RX) | |
3545 | stl_cd1400rxisr(panelp, iobase); | |
3546 | else if (svrtype & SVRR_TX) | |
3547 | stl_cd1400txisr(panelp, iobase); | |
3548 | else if (svrtype & SVRR_MDM) | |
3549 | stl_cd1400mdmisr(panelp, iobase); | |
3550 | } | |
3551 | ||
3552 | ||
3553 | /*****************************************************************************/ | |
3554 | ||
3555 | /* | |
3556 | * Unfortunately we need to handle breaks in the TX data stream, since | |
3557 | * this is the only way to generate them on the cd1400. | |
3558 | */ | |
3559 | ||
60be4810 | 3560 | static int stl_cd1400breakisr(struct stlport *portp, int ioaddr) |
1da177e4 LT |
3561 | { |
3562 | if (portp->brklen == 1) { | |
3563 | outb((COR2 + portp->uartaddr), ioaddr); | |
3564 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), | |
3565 | (ioaddr + EREG_DATA)); | |
3566 | outb((TDR + portp->uartaddr), ioaddr); | |
3567 | outb(ETC_CMD, (ioaddr + EREG_DATA)); | |
3568 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); | |
3569 | outb((SRER + portp->uartaddr), ioaddr); | |
3570 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), | |
3571 | (ioaddr + EREG_DATA)); | |
014c2544 | 3572 | return 1; |
1da177e4 LT |
3573 | } else if (portp->brklen > 1) { |
3574 | outb((TDR + portp->uartaddr), ioaddr); | |
3575 | outb(ETC_CMD, (ioaddr + EREG_DATA)); | |
3576 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); | |
3577 | portp->brklen = -1; | |
014c2544 | 3578 | return 1; |
1da177e4 LT |
3579 | } else { |
3580 | outb((COR2 + portp->uartaddr), ioaddr); | |
3581 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), | |
3582 | (ioaddr + EREG_DATA)); | |
3583 | portp->brklen = 0; | |
3584 | } | |
014c2544 | 3585 | return 0; |
1da177e4 LT |
3586 | } |
3587 | ||
3588 | /*****************************************************************************/ | |
3589 | ||
3590 | /* | |
3591 | * Transmit interrupt handler. This has gotta be fast! Handling TX | |
3592 | * chars is pretty simple, stuff as many as possible from the TX buffer | |
3593 | * into the cd1400 FIFO. Must also handle TX breaks here, since they | |
3594 | * are embedded as commands in the data stream. Oh no, had to use a goto! | |
3595 | * This could be optimized more, will do when I get time... | |
3596 | * In practice it is possible that interrupts are enabled but that the | |
3597 | * port has been hung up. Need to handle not having any TX buffer here, | |
3598 | * this is done by using the side effect that head and tail will also | |
3599 | * be NULL if the buffer has been freed. | |
3600 | */ | |
3601 | ||
ca7ed0f2 | 3602 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr) |
1da177e4 | 3603 | { |
ca7ed0f2 | 3604 | struct stlport *portp; |
1da177e4 LT |
3605 | int len, stlen; |
3606 | char *head, *tail; | |
3607 | unsigned char ioack, srer; | |
3608 | ||
a0564e14 | 3609 | pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
1da177e4 LT |
3610 | |
3611 | ioack = inb(ioaddr + EREG_TXACK); | |
3612 | if (((ioack & panelp->ackmask) != 0) || | |
3613 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { | |
3614 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); | |
3615 | return; | |
3616 | } | |
3617 | portp = panelp->ports[(ioack >> 3)]; | |
3618 | ||
3619 | /* | |
3620 | * Unfortunately we need to handle breaks in the data stream, since | |
3621 | * this is the only way to generate them on the cd1400. Do it now if | |
3622 | * a break is to be sent. | |
3623 | */ | |
3624 | if (portp->brklen != 0) | |
3625 | if (stl_cd1400breakisr(portp, ioaddr)) | |
3626 | goto stl_txalldone; | |
3627 | ||
3628 | head = portp->tx.head; | |
3629 | tail = portp->tx.tail; | |
3630 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
3631 | if ((len == 0) || ((len < STL_TXBUFLOW) && | |
3632 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { | |
3633 | set_bit(ASYI_TXLOW, &portp->istate); | |
3634 | schedule_work(&portp->tqueue); | |
3635 | } | |
3636 | ||
3637 | if (len == 0) { | |
3638 | outb((SRER + portp->uartaddr), ioaddr); | |
3639 | srer = inb(ioaddr + EREG_DATA); | |
3640 | if (srer & SRER_TXDATA) { | |
3641 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; | |
3642 | } else { | |
3643 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); | |
3644 | clear_bit(ASYI_TXBUSY, &portp->istate); | |
3645 | } | |
3646 | outb(srer, (ioaddr + EREG_DATA)); | |
3647 | } else { | |
3648 | len = MIN(len, CD1400_TXFIFOSIZE); | |
3649 | portp->stats.txtotal += len; | |
3650 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); | |
3651 | outb((TDR + portp->uartaddr), ioaddr); | |
3652 | outsb((ioaddr + EREG_DATA), tail, stlen); | |
3653 | len -= stlen; | |
3654 | tail += stlen; | |
3655 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) | |
3656 | tail = portp->tx.buf; | |
3657 | if (len > 0) { | |
3658 | outsb((ioaddr + EREG_DATA), tail, len); | |
3659 | tail += len; | |
3660 | } | |
3661 | portp->tx.tail = tail; | |
3662 | } | |
3663 | ||
3664 | stl_txalldone: | |
3665 | outb((EOSRR + portp->uartaddr), ioaddr); | |
3666 | outb(0, (ioaddr + EREG_DATA)); | |
3667 | } | |
3668 | ||
3669 | /*****************************************************************************/ | |
3670 | ||
3671 | /* | |
3672 | * Receive character interrupt handler. Determine if we have good chars | |
3673 | * or bad chars and then process appropriately. Good chars are easy | |
3674 | * just shove the lot into the RX buffer and set all status byte to 0. | |
3675 | * If a bad RX char then process as required. This routine needs to be | |
3676 | * fast! In practice it is possible that we get an interrupt on a port | |
3677 | * that is closed. This can happen on hangups - since they completely | |
3678 | * shutdown a port not in user context. Need to handle this case. | |
3679 | */ | |
3680 | ||
ca7ed0f2 | 3681 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr) |
1da177e4 | 3682 | { |
ca7ed0f2 | 3683 | struct stlport *portp; |
1da177e4 LT |
3684 | struct tty_struct *tty; |
3685 | unsigned int ioack, len, buflen; | |
3686 | unsigned char status; | |
3687 | char ch; | |
3688 | ||
a0564e14 | 3689 | pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
1da177e4 LT |
3690 | |
3691 | ioack = inb(ioaddr + EREG_RXACK); | |
3692 | if ((ioack & panelp->ackmask) != 0) { | |
3693 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); | |
3694 | return; | |
3695 | } | |
3696 | portp = panelp->ports[(ioack >> 3)]; | |
3697 | tty = portp->tty; | |
3698 | ||
3699 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { | |
3700 | outb((RDCR + portp->uartaddr), ioaddr); | |
3701 | len = inb(ioaddr + EREG_DATA); | |
33f0f88f | 3702 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
1da177e4 LT |
3703 | len = MIN(len, sizeof(stl_unwanted)); |
3704 | outb((RDSR + portp->uartaddr), ioaddr); | |
3705 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); | |
3706 | portp->stats.rxlost += len; | |
3707 | portp->stats.rxtotal += len; | |
3708 | } else { | |
3709 | len = MIN(len, buflen); | |
3710 | if (len > 0) { | |
33f0f88f | 3711 | unsigned char *ptr; |
1da177e4 | 3712 | outb((RDSR + portp->uartaddr), ioaddr); |
33f0f88f AC |
3713 | tty_prepare_flip_string(tty, &ptr, len); |
3714 | insb((ioaddr + EREG_DATA), ptr, len); | |
1da177e4 LT |
3715 | tty_schedule_flip(tty); |
3716 | portp->stats.rxtotal += len; | |
3717 | } | |
3718 | } | |
3719 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { | |
3720 | outb((RDSR + portp->uartaddr), ioaddr); | |
3721 | status = inb(ioaddr + EREG_DATA); | |
3722 | ch = inb(ioaddr + EREG_DATA); | |
3723 | if (status & ST_PARITY) | |
3724 | portp->stats.rxparity++; | |
3725 | if (status & ST_FRAMING) | |
3726 | portp->stats.rxframing++; | |
3727 | if (status & ST_OVERRUN) | |
3728 | portp->stats.rxoverrun++; | |
3729 | if (status & ST_BREAK) | |
3730 | portp->stats.rxbreaks++; | |
3731 | if (status & ST_SCHARMASK) { | |
3732 | if ((status & ST_SCHARMASK) == ST_SCHAR1) | |
3733 | portp->stats.txxon++; | |
3734 | if ((status & ST_SCHARMASK) == ST_SCHAR2) | |
3735 | portp->stats.txxoff++; | |
3736 | goto stl_rxalldone; | |
3737 | } | |
33f0f88f | 3738 | if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
1da177e4 LT |
3739 | if (portp->rxmarkmsk & status) { |
3740 | if (status & ST_BREAK) { | |
3741 | status = TTY_BREAK; | |
3742 | if (portp->flags & ASYNC_SAK) { | |
3743 | do_SAK(tty); | |
3744 | BRDENABLE(portp->brdnr, portp->pagenr); | |
3745 | } | |
3746 | } else if (status & ST_PARITY) { | |
3747 | status = TTY_PARITY; | |
3748 | } else if (status & ST_FRAMING) { | |
3749 | status = TTY_FRAME; | |
3750 | } else if(status & ST_OVERRUN) { | |
3751 | status = TTY_OVERRUN; | |
3752 | } else { | |
3753 | status = 0; | |
3754 | } | |
3755 | } else { | |
3756 | status = 0; | |
3757 | } | |
33f0f88f AC |
3758 | tty_insert_flip_char(tty, ch, status); |
3759 | tty_schedule_flip(tty); | |
1da177e4 LT |
3760 | } |
3761 | } else { | |
3762 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); | |
3763 | return; | |
3764 | } | |
3765 | ||
3766 | stl_rxalldone: | |
3767 | outb((EOSRR + portp->uartaddr), ioaddr); | |
3768 | outb(0, (ioaddr + EREG_DATA)); | |
3769 | } | |
3770 | ||
3771 | /*****************************************************************************/ | |
3772 | ||
3773 | /* | |
3774 | * Modem interrupt handler. The is called when the modem signal line | |
3775 | * (DCD) has changed state. Leave most of the work to the off-level | |
3776 | * processing routine. | |
3777 | */ | |
3778 | ||
ca7ed0f2 | 3779 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr) |
1da177e4 | 3780 | { |
ca7ed0f2 | 3781 | struct stlport *portp; |
1da177e4 LT |
3782 | unsigned int ioack; |
3783 | unsigned char misr; | |
3784 | ||
a0564e14 | 3785 | pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp); |
1da177e4 LT |
3786 | |
3787 | ioack = inb(ioaddr + EREG_MDACK); | |
3788 | if (((ioack & panelp->ackmask) != 0) || | |
3789 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { | |
3790 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); | |
3791 | return; | |
3792 | } | |
3793 | portp = panelp->ports[(ioack >> 3)]; | |
3794 | ||
3795 | outb((MISR + portp->uartaddr), ioaddr); | |
3796 | misr = inb(ioaddr + EREG_DATA); | |
3797 | if (misr & MISR_DCD) { | |
3798 | set_bit(ASYI_DCDCHANGE, &portp->istate); | |
3799 | schedule_work(&portp->tqueue); | |
3800 | portp->stats.modem++; | |
3801 | } | |
3802 | ||
3803 | outb((EOSRR + portp->uartaddr), ioaddr); | |
3804 | outb(0, (ioaddr + EREG_DATA)); | |
3805 | } | |
3806 | ||
3807 | /*****************************************************************************/ | |
3808 | /* SC26198 HARDWARE FUNCTIONS */ | |
3809 | /*****************************************************************************/ | |
3810 | ||
3811 | /* | |
3812 | * These functions get/set/update the registers of the sc26198 UARTs. | |
3813 | * Access to the sc26198 registers is via an address/data io port pair. | |
3814 | * (Maybe should make this inline...) | |
3815 | */ | |
3816 | ||
ca7ed0f2 | 3817 | static int stl_sc26198getreg(struct stlport *portp, int regnr) |
1da177e4 LT |
3818 | { |
3819 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
014c2544 | 3820 | return inb(portp->ioaddr + XP_DATA); |
1da177e4 LT |
3821 | } |
3822 | ||
ca7ed0f2 | 3823 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
3824 | { |
3825 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
3826 | outb(value, (portp->ioaddr + XP_DATA)); | |
3827 | } | |
3828 | ||
ca7ed0f2 | 3829 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
3830 | { |
3831 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
3832 | if (inb(portp->ioaddr + XP_DATA) != value) { | |
3833 | outb(value, (portp->ioaddr + XP_DATA)); | |
014c2544 | 3834 | return 1; |
1da177e4 | 3835 | } |
014c2544 | 3836 | return 0; |
1da177e4 LT |
3837 | } |
3838 | ||
3839 | /*****************************************************************************/ | |
3840 | ||
3841 | /* | |
3842 | * Functions to get and set the sc26198 global registers. | |
3843 | */ | |
3844 | ||
ca7ed0f2 | 3845 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr) |
1da177e4 LT |
3846 | { |
3847 | outb(regnr, (portp->ioaddr + XP_ADDR)); | |
014c2544 | 3848 | return inb(portp->ioaddr + XP_DATA); |
1da177e4 LT |
3849 | } |
3850 | ||
3851 | #if 0 | |
ca7ed0f2 | 3852 | static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
3853 | { |
3854 | outb(regnr, (portp->ioaddr + XP_ADDR)); | |
3855 | outb(value, (portp->ioaddr + XP_DATA)); | |
3856 | } | |
3857 | #endif | |
3858 | ||
3859 | /*****************************************************************************/ | |
3860 | ||
3861 | /* | |
3862 | * Inbitialize the UARTs in a panel. We don't care what sort of board | |
3863 | * these ports are on - since the port io registers are almost | |
3864 | * identical when dealing with ports. | |
3865 | */ | |
3866 | ||
ca7ed0f2 | 3867 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
1da177e4 LT |
3868 | { |
3869 | int chipmask, i; | |
3870 | int nrchips, ioaddr; | |
3871 | ||
a0564e14 | 3872 | pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
1da177e4 LT |
3873 | |
3874 | BRDENABLE(panelp->brdnr, panelp->pagenr); | |
3875 | ||
3876 | /* | |
3877 | * Check that each chip is present and started up OK. | |
3878 | */ | |
3879 | chipmask = 0; | |
3880 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; | |
3881 | if (brdp->brdtype == BRD_ECHPCI) | |
3882 | outb(panelp->pagenr, brdp->ioctrl); | |
3883 | ||
3884 | for (i = 0; (i < nrchips); i++) { | |
3885 | ioaddr = panelp->iobase + (i * 4); | |
3886 | outb(SCCR, (ioaddr + XP_ADDR)); | |
3887 | outb(CR_RESETALL, (ioaddr + XP_DATA)); | |
3888 | outb(TSTR, (ioaddr + XP_ADDR)); | |
3889 | if (inb(ioaddr + XP_DATA) != 0) { | |
3890 | printk("STALLION: sc26198 not responding, " | |
3891 | "brd=%d panel=%d chip=%d\n", | |
3892 | panelp->brdnr, panelp->panelnr, i); | |
3893 | continue; | |
3894 | } | |
3895 | chipmask |= (0x1 << i); | |
3896 | outb(GCCR, (ioaddr + XP_ADDR)); | |
3897 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); | |
3898 | outb(WDTRCR, (ioaddr + XP_ADDR)); | |
3899 | outb(0xff, (ioaddr + XP_DATA)); | |
3900 | } | |
3901 | ||
3902 | BRDDISABLE(panelp->brdnr); | |
014c2544 | 3903 | return chipmask; |
1da177e4 LT |
3904 | } |
3905 | ||
3906 | /*****************************************************************************/ | |
3907 | ||
3908 | /* | |
3909 | * Initialize hardware specific port registers. | |
3910 | */ | |
3911 | ||
ca7ed0f2 | 3912 | static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
1da177e4 | 3913 | { |
a0564e14 JS |
3914 | pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
3915 | panelp, portp); | |
1da177e4 | 3916 | |
615e4a71 JS |
3917 | if ((brdp == NULL) || (panelp == NULL) || |
3918 | (portp == NULL)) | |
1da177e4 LT |
3919 | return; |
3920 | ||
3921 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); | |
3922 | portp->uartaddr = (portp->portnr & 0x07) << 4; | |
3923 | portp->pagenr = panelp->pagenr; | |
3924 | portp->hwid = 0x1; | |
3925 | ||
3926 | BRDENABLE(portp->brdnr, portp->pagenr); | |
3927 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); | |
3928 | BRDDISABLE(portp->brdnr); | |
3929 | } | |
3930 | ||
3931 | /*****************************************************************************/ | |
3932 | ||
3933 | /* | |
3934 | * Set up the sc26198 registers for a port based on the termios port | |
3935 | * settings. | |
3936 | */ | |
3937 | ||
606d099c | 3938 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp) |
1da177e4 | 3939 | { |
ca7ed0f2 | 3940 | struct stlbrd *brdp; |
1da177e4 LT |
3941 | unsigned long flags; |
3942 | unsigned int baudrate; | |
3943 | unsigned char mr0, mr1, mr2, clk; | |
3944 | unsigned char imron, imroff, iopr, ipr; | |
3945 | ||
3946 | mr0 = 0; | |
3947 | mr1 = 0; | |
3948 | mr2 = 0; | |
3949 | clk = 0; | |
3950 | iopr = 0; | |
3951 | imron = 0; | |
3952 | imroff = 0; | |
3953 | ||
3954 | brdp = stl_brds[portp->brdnr]; | |
615e4a71 | 3955 | if (brdp == NULL) |
1da177e4 LT |
3956 | return; |
3957 | ||
3958 | /* | |
3959 | * Set up the RX char ignore mask with those RX error types we | |
3960 | * can ignore. | |
3961 | */ | |
3962 | portp->rxignoremsk = 0; | |
3963 | if (tiosp->c_iflag & IGNPAR) | |
3964 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | | |
3965 | SR_RXOVERRUN); | |
3966 | if (tiosp->c_iflag & IGNBRK) | |
3967 | portp->rxignoremsk |= SR_RXBREAK; | |
3968 | ||
3969 | portp->rxmarkmsk = SR_RXOVERRUN; | |
3970 | if (tiosp->c_iflag & (INPCK | PARMRK)) | |
3971 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); | |
3972 | if (tiosp->c_iflag & BRKINT) | |
3973 | portp->rxmarkmsk |= SR_RXBREAK; | |
3974 | ||
3975 | /* | |
3976 | * Go through the char size, parity and stop bits and set all the | |
3977 | * option register appropriately. | |
3978 | */ | |
3979 | switch (tiosp->c_cflag & CSIZE) { | |
3980 | case CS5: | |
3981 | mr1 |= MR1_CS5; | |
3982 | break; | |
3983 | case CS6: | |
3984 | mr1 |= MR1_CS6; | |
3985 | break; | |
3986 | case CS7: | |
3987 | mr1 |= MR1_CS7; | |
3988 | break; | |
3989 | default: | |
3990 | mr1 |= MR1_CS8; | |
3991 | break; | |
3992 | } | |
3993 | ||
3994 | if (tiosp->c_cflag & CSTOPB) | |
3995 | mr2 |= MR2_STOP2; | |
3996 | else | |
3997 | mr2 |= MR2_STOP1; | |
3998 | ||
3999 | if (tiosp->c_cflag & PARENB) { | |
4000 | if (tiosp->c_cflag & PARODD) | |
4001 | mr1 |= (MR1_PARENB | MR1_PARODD); | |
4002 | else | |
4003 | mr1 |= (MR1_PARENB | MR1_PAREVEN); | |
4004 | } else { | |
4005 | mr1 |= MR1_PARNONE; | |
4006 | } | |
4007 | ||
4008 | mr1 |= MR1_ERRBLOCK; | |
4009 | ||
4010 | /* | |
4011 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing | |
4012 | * space for hardware flow control and the like. This should be set to | |
4013 | * VMIN. | |
4014 | */ | |
4015 | mr2 |= MR2_RXFIFOHALF; | |
4016 | ||
4017 | /* | |
4018 | * Calculate the baud rate timers. For now we will just assume that | |
4019 | * the input and output baud are the same. The sc26198 has a fixed | |
4020 | * baud rate table, so only discrete baud rates possible. | |
4021 | */ | |
4022 | baudrate = tiosp->c_cflag & CBAUD; | |
4023 | if (baudrate & CBAUDEX) { | |
4024 | baudrate &= ~CBAUDEX; | |
4025 | if ((baudrate < 1) || (baudrate > 4)) | |
4026 | tiosp->c_cflag &= ~CBAUDEX; | |
4027 | else | |
4028 | baudrate += 15; | |
4029 | } | |
4030 | baudrate = stl_baudrates[baudrate]; | |
4031 | if ((tiosp->c_cflag & CBAUD) == B38400) { | |
4032 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
4033 | baudrate = 57600; | |
4034 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
4035 | baudrate = 115200; | |
4036 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) | |
4037 | baudrate = 230400; | |
4038 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
4039 | baudrate = 460800; | |
4040 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) | |
4041 | baudrate = (portp->baud_base / portp->custom_divisor); | |
4042 | } | |
4043 | if (baudrate > STL_SC26198MAXBAUD) | |
4044 | baudrate = STL_SC26198MAXBAUD; | |
4045 | ||
4046 | if (baudrate > 0) { | |
4047 | for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { | |
4048 | if (baudrate <= sc26198_baudtable[clk]) | |
4049 | break; | |
4050 | } | |
4051 | } | |
4052 | ||
4053 | /* | |
4054 | * Check what form of modem signaling is required and set it up. | |
4055 | */ | |
4056 | if (tiosp->c_cflag & CLOCAL) { | |
4057 | portp->flags &= ~ASYNC_CHECK_CD; | |
4058 | } else { | |
4059 | iopr |= IOPR_DCDCOS; | |
4060 | imron |= IR_IOPORT; | |
4061 | portp->flags |= ASYNC_CHECK_CD; | |
4062 | } | |
4063 | ||
4064 | /* | |
4065 | * Setup sc26198 enhanced modes if we can. In particular we want to | |
4066 | * handle as much of the flow control as possible automatically. As | |
4067 | * well as saving a few CPU cycles it will also greatly improve flow | |
4068 | * control reliability. | |
4069 | */ | |
4070 | if (tiosp->c_iflag & IXON) { | |
4071 | mr0 |= MR0_SWFTX | MR0_SWFT; | |
4072 | imron |= IR_XONXOFF; | |
4073 | } else { | |
4074 | imroff |= IR_XONXOFF; | |
4075 | } | |
4076 | if (tiosp->c_iflag & IXOFF) | |
4077 | mr0 |= MR0_SWFRX; | |
4078 | ||
4079 | if (tiosp->c_cflag & CRTSCTS) { | |
4080 | mr2 |= MR2_AUTOCTS; | |
4081 | mr1 |= MR1_AUTORTS; | |
4082 | } | |
4083 | ||
4084 | /* | |
4085 | * All sc26198 register values calculated so go through and set | |
4086 | * them all up. | |
4087 | */ | |
4088 | ||
a0564e14 | 4089 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
1da177e4 | 4090 | portp->portnr, portp->panelnr, portp->brdnr); |
a0564e14 JS |
4091 | pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
4092 | pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); | |
4093 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", | |
1da177e4 LT |
4094 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
4095 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); | |
1da177e4 | 4096 | |
b65b5b59 | 4097 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4098 | BRDENABLE(portp->brdnr, portp->pagenr); |
4099 | stl_sc26198setreg(portp, IMR, 0); | |
4100 | stl_sc26198updatereg(portp, MR0, mr0); | |
4101 | stl_sc26198updatereg(portp, MR1, mr1); | |
4102 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); | |
4103 | stl_sc26198updatereg(portp, MR2, mr2); | |
4104 | stl_sc26198updatereg(portp, IOPIOR, | |
4105 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); | |
4106 | ||
4107 | if (baudrate > 0) { | |
4108 | stl_sc26198setreg(portp, TXCSR, clk); | |
4109 | stl_sc26198setreg(portp, RXCSR, clk); | |
4110 | } | |
4111 | ||
4112 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); | |
4113 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); | |
4114 | ||
4115 | ipr = stl_sc26198getreg(portp, IPR); | |
4116 | if (ipr & IPR_DCD) | |
4117 | portp->sigs &= ~TIOCM_CD; | |
4118 | else | |
4119 | portp->sigs |= TIOCM_CD; | |
4120 | ||
4121 | portp->imr = (portp->imr & ~imroff) | imron; | |
4122 | stl_sc26198setreg(portp, IMR, portp->imr); | |
4123 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4124 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4125 | } |
4126 | ||
4127 | /*****************************************************************************/ | |
4128 | ||
4129 | /* | |
4130 | * Set the state of the DTR and RTS signals. | |
4131 | */ | |
4132 | ||
ca7ed0f2 | 4133 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts) |
1da177e4 LT |
4134 | { |
4135 | unsigned char iopioron, iopioroff; | |
4136 | unsigned long flags; | |
4137 | ||
a0564e14 JS |
4138 | pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp, |
4139 | dtr, rts); | |
1da177e4 LT |
4140 | |
4141 | iopioron = 0; | |
4142 | iopioroff = 0; | |
4143 | if (dtr == 0) | |
4144 | iopioroff |= IPR_DTR; | |
4145 | else if (dtr > 0) | |
4146 | iopioron |= IPR_DTR; | |
4147 | if (rts == 0) | |
4148 | iopioroff |= IPR_RTS; | |
4149 | else if (rts > 0) | |
4150 | iopioron |= IPR_RTS; | |
4151 | ||
b65b5b59 | 4152 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4153 | BRDENABLE(portp->brdnr, portp->pagenr); |
4154 | stl_sc26198setreg(portp, IOPIOR, | |
4155 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); | |
4156 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4157 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4158 | } |
4159 | ||
4160 | /*****************************************************************************/ | |
4161 | ||
4162 | /* | |
4163 | * Return the state of the signals. | |
4164 | */ | |
4165 | ||
ca7ed0f2 | 4166 | static int stl_sc26198getsignals(struct stlport *portp) |
1da177e4 LT |
4167 | { |
4168 | unsigned char ipr; | |
4169 | unsigned long flags; | |
4170 | int sigs; | |
4171 | ||
a0564e14 | 4172 | pr_debug("stl_sc26198getsignals(portp=%p)\n", portp); |
1da177e4 | 4173 | |
b65b5b59 | 4174 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4175 | BRDENABLE(portp->brdnr, portp->pagenr); |
4176 | ipr = stl_sc26198getreg(portp, IPR); | |
4177 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4178 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4179 | |
4180 | sigs = 0; | |
4181 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; | |
4182 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; | |
4183 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; | |
4184 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; | |
4185 | sigs |= TIOCM_DSR; | |
014c2544 | 4186 | return sigs; |
1da177e4 LT |
4187 | } |
4188 | ||
4189 | /*****************************************************************************/ | |
4190 | ||
4191 | /* | |
4192 | * Enable/Disable the Transmitter and/or Receiver. | |
4193 | */ | |
4194 | ||
ca7ed0f2 | 4195 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
4196 | { |
4197 | unsigned char ccr; | |
4198 | unsigned long flags; | |
4199 | ||
a0564e14 | 4200 | pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx); |
1da177e4 LT |
4201 | |
4202 | ccr = portp->crenable; | |
4203 | if (tx == 0) | |
4204 | ccr &= ~CR_TXENABLE; | |
4205 | else if (tx > 0) | |
4206 | ccr |= CR_TXENABLE; | |
4207 | if (rx == 0) | |
4208 | ccr &= ~CR_RXENABLE; | |
4209 | else if (rx > 0) | |
4210 | ccr |= CR_RXENABLE; | |
4211 | ||
b65b5b59 | 4212 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4213 | BRDENABLE(portp->brdnr, portp->pagenr); |
4214 | stl_sc26198setreg(portp, SCCR, ccr); | |
4215 | BRDDISABLE(portp->brdnr); | |
4216 | portp->crenable = ccr; | |
b65b5b59 | 4217 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4218 | } |
4219 | ||
4220 | /*****************************************************************************/ | |
4221 | ||
4222 | /* | |
4223 | * Start/stop the Transmitter and/or Receiver. | |
4224 | */ | |
4225 | ||
ca7ed0f2 | 4226 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
4227 | { |
4228 | unsigned char imr; | |
4229 | unsigned long flags; | |
4230 | ||
a0564e14 | 4231 | pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
1da177e4 LT |
4232 | |
4233 | imr = portp->imr; | |
4234 | if (tx == 0) | |
4235 | imr &= ~IR_TXRDY; | |
4236 | else if (tx == 1) | |
4237 | imr |= IR_TXRDY; | |
4238 | if (rx == 0) | |
4239 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); | |
4240 | else if (rx > 0) | |
4241 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; | |
4242 | ||
b65b5b59 | 4243 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4244 | BRDENABLE(portp->brdnr, portp->pagenr); |
4245 | stl_sc26198setreg(portp, IMR, imr); | |
4246 | BRDDISABLE(portp->brdnr); | |
4247 | portp->imr = imr; | |
4248 | if (tx > 0) | |
4249 | set_bit(ASYI_TXBUSY, &portp->istate); | |
b65b5b59 | 4250 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4251 | } |
4252 | ||
4253 | /*****************************************************************************/ | |
4254 | ||
4255 | /* | |
4256 | * Disable all interrupts from this port. | |
4257 | */ | |
4258 | ||
ca7ed0f2 | 4259 | static void stl_sc26198disableintrs(struct stlport *portp) |
1da177e4 LT |
4260 | { |
4261 | unsigned long flags; | |
4262 | ||
a0564e14 | 4263 | pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp); |
1da177e4 | 4264 | |
b65b5b59 | 4265 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4266 | BRDENABLE(portp->brdnr, portp->pagenr); |
4267 | portp->imr = 0; | |
4268 | stl_sc26198setreg(portp, IMR, 0); | |
4269 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4270 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4271 | } |
4272 | ||
4273 | /*****************************************************************************/ | |
4274 | ||
ca7ed0f2 | 4275 | static void stl_sc26198sendbreak(struct stlport *portp, int len) |
1da177e4 LT |
4276 | { |
4277 | unsigned long flags; | |
4278 | ||
a0564e14 | 4279 | pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len); |
1da177e4 | 4280 | |
b65b5b59 | 4281 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4282 | BRDENABLE(portp->brdnr, portp->pagenr); |
4283 | if (len == 1) { | |
4284 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); | |
4285 | portp->stats.txbreaks++; | |
4286 | } else { | |
4287 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); | |
4288 | } | |
4289 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4290 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4291 | } |
4292 | ||
4293 | /*****************************************************************************/ | |
4294 | ||
4295 | /* | |
4296 | * Take flow control actions... | |
4297 | */ | |
4298 | ||
ca7ed0f2 | 4299 | static void stl_sc26198flowctrl(struct stlport *portp, int state) |
1da177e4 LT |
4300 | { |
4301 | struct tty_struct *tty; | |
4302 | unsigned long flags; | |
4303 | unsigned char mr0; | |
4304 | ||
a0564e14 | 4305 | pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 4306 | |
615e4a71 | 4307 | if (portp == NULL) |
1da177e4 LT |
4308 | return; |
4309 | tty = portp->tty; | |
615e4a71 | 4310 | if (tty == NULL) |
1da177e4 LT |
4311 | return; |
4312 | ||
b65b5b59 | 4313 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4314 | BRDENABLE(portp->brdnr, portp->pagenr); |
4315 | ||
4316 | if (state) { | |
4317 | if (tty->termios->c_iflag & IXOFF) { | |
4318 | mr0 = stl_sc26198getreg(portp, MR0); | |
4319 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4320 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); | |
4321 | mr0 |= MR0_SWFRX; | |
4322 | portp->stats.rxxon++; | |
4323 | stl_sc26198wait(portp); | |
4324 | stl_sc26198setreg(portp, MR0, mr0); | |
4325 | } | |
4326 | /* | |
4327 | * Question: should we return RTS to what it was before? It may | |
4328 | * have been set by an ioctl... Suppose not, since if you have | |
4329 | * hardware flow control set then it is pretty silly to go and | |
4330 | * set the RTS line by hand. | |
4331 | */ | |
4332 | if (tty->termios->c_cflag & CRTSCTS) { | |
4333 | stl_sc26198setreg(portp, MR1, | |
4334 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); | |
4335 | stl_sc26198setreg(portp, IOPIOR, | |
4336 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); | |
4337 | portp->stats.rxrtson++; | |
4338 | } | |
4339 | } else { | |
4340 | if (tty->termios->c_iflag & IXOFF) { | |
4341 | mr0 = stl_sc26198getreg(portp, MR0); | |
4342 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4343 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); | |
4344 | mr0 &= ~MR0_SWFRX; | |
4345 | portp->stats.rxxoff++; | |
4346 | stl_sc26198wait(portp); | |
4347 | stl_sc26198setreg(portp, MR0, mr0); | |
4348 | } | |
4349 | if (tty->termios->c_cflag & CRTSCTS) { | |
4350 | stl_sc26198setreg(portp, MR1, | |
4351 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); | |
4352 | stl_sc26198setreg(portp, IOPIOR, | |
4353 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); | |
4354 | portp->stats.rxrtsoff++; | |
4355 | } | |
4356 | } | |
4357 | ||
4358 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4359 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4360 | } |
4361 | ||
4362 | /*****************************************************************************/ | |
4363 | ||
4364 | /* | |
4365 | * Send a flow control character. | |
4366 | */ | |
4367 | ||
ca7ed0f2 | 4368 | static void stl_sc26198sendflow(struct stlport *portp, int state) |
1da177e4 LT |
4369 | { |
4370 | struct tty_struct *tty; | |
4371 | unsigned long flags; | |
4372 | unsigned char mr0; | |
4373 | ||
a0564e14 | 4374 | pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 4375 | |
615e4a71 | 4376 | if (portp == NULL) |
1da177e4 LT |
4377 | return; |
4378 | tty = portp->tty; | |
615e4a71 | 4379 | if (tty == NULL) |
1da177e4 LT |
4380 | return; |
4381 | ||
b65b5b59 | 4382 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4383 | BRDENABLE(portp->brdnr, portp->pagenr); |
4384 | if (state) { | |
4385 | mr0 = stl_sc26198getreg(portp, MR0); | |
4386 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4387 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); | |
4388 | mr0 |= MR0_SWFRX; | |
4389 | portp->stats.rxxon++; | |
4390 | stl_sc26198wait(portp); | |
4391 | stl_sc26198setreg(portp, MR0, mr0); | |
4392 | } else { | |
4393 | mr0 = stl_sc26198getreg(portp, MR0); | |
4394 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4395 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); | |
4396 | mr0 &= ~MR0_SWFRX; | |
4397 | portp->stats.rxxoff++; | |
4398 | stl_sc26198wait(portp); | |
4399 | stl_sc26198setreg(portp, MR0, mr0); | |
4400 | } | |
4401 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4402 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4403 | } |
4404 | ||
4405 | /*****************************************************************************/ | |
4406 | ||
ca7ed0f2 | 4407 | static void stl_sc26198flush(struct stlport *portp) |
1da177e4 LT |
4408 | { |
4409 | unsigned long flags; | |
4410 | ||
a0564e14 | 4411 | pr_debug("stl_sc26198flush(portp=%p)\n", portp); |
1da177e4 | 4412 | |
615e4a71 | 4413 | if (portp == NULL) |
1da177e4 LT |
4414 | return; |
4415 | ||
b65b5b59 | 4416 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4417 | BRDENABLE(portp->brdnr, portp->pagenr); |
4418 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); | |
4419 | stl_sc26198setreg(portp, SCCR, portp->crenable); | |
4420 | BRDDISABLE(portp->brdnr); | |
4421 | portp->tx.tail = portp->tx.head; | |
b65b5b59 | 4422 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4423 | } |
4424 | ||
4425 | /*****************************************************************************/ | |
4426 | ||
4427 | /* | |
4428 | * Return the current state of data flow on this port. This is only | |
4429 | * really interresting when determining if data has fully completed | |
4430 | * transmission or not... The sc26198 interrupt scheme cannot | |
4431 | * determine when all data has actually drained, so we need to | |
4432 | * check the port statusy register to be sure. | |
4433 | */ | |
4434 | ||
ca7ed0f2 | 4435 | static int stl_sc26198datastate(struct stlport *portp) |
1da177e4 LT |
4436 | { |
4437 | unsigned long flags; | |
4438 | unsigned char sr; | |
4439 | ||
a0564e14 | 4440 | pr_debug("stl_sc26198datastate(portp=%p)\n", portp); |
1da177e4 | 4441 | |
615e4a71 | 4442 | if (portp == NULL) |
014c2544 | 4443 | return 0; |
1da177e4 | 4444 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
014c2544 | 4445 | return 1; |
1da177e4 | 4446 | |
b65b5b59 | 4447 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4448 | BRDENABLE(portp->brdnr, portp->pagenr); |
4449 | sr = stl_sc26198getreg(portp, SR); | |
4450 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4451 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 | 4452 | |
014c2544 | 4453 | return (sr & SR_TXEMPTY) ? 0 : 1; |
1da177e4 LT |
4454 | } |
4455 | ||
4456 | /*****************************************************************************/ | |
4457 | ||
4458 | /* | |
4459 | * Delay for a small amount of time, to give the sc26198 a chance | |
4460 | * to process a command... | |
4461 | */ | |
4462 | ||
ca7ed0f2 | 4463 | static void stl_sc26198wait(struct stlport *portp) |
1da177e4 LT |
4464 | { |
4465 | int i; | |
4466 | ||
a0564e14 | 4467 | pr_debug("stl_sc26198wait(portp=%p)\n", portp); |
1da177e4 | 4468 | |
615e4a71 | 4469 | if (portp == NULL) |
1da177e4 LT |
4470 | return; |
4471 | ||
4472 | for (i = 0; (i < 20); i++) | |
4473 | stl_sc26198getglobreg(portp, TSTR); | |
4474 | } | |
4475 | ||
4476 | /*****************************************************************************/ | |
4477 | ||
4478 | /* | |
4479 | * If we are TX flow controlled and in IXANY mode then we may | |
4480 | * need to unflow control here. We gotta do this because of the | |
4481 | * automatic flow control modes of the sc26198. | |
4482 | */ | |
4483 | ||
60be4810 | 4484 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty) |
1da177e4 LT |
4485 | { |
4486 | unsigned char mr0; | |
4487 | ||
4488 | mr0 = stl_sc26198getreg(portp, MR0); | |
4489 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4490 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); | |
4491 | stl_sc26198wait(portp); | |
4492 | stl_sc26198setreg(portp, MR0, mr0); | |
4493 | clear_bit(ASYI_TXFLOWED, &portp->istate); | |
4494 | } | |
4495 | ||
4496 | /*****************************************************************************/ | |
4497 | ||
4498 | /* | |
4499 | * Interrupt service routine for sc26198 panels. | |
4500 | */ | |
4501 | ||
ca7ed0f2 | 4502 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase) |
1da177e4 | 4503 | { |
ca7ed0f2 | 4504 | struct stlport *portp; |
1da177e4 LT |
4505 | unsigned int iack; |
4506 | ||
b65b5b59 AC |
4507 | spin_lock(&brd_lock); |
4508 | ||
1da177e4 LT |
4509 | /* |
4510 | * Work around bug in sc26198 chip... Cannot have A6 address | |
4511 | * line of UART high, else iack will be returned as 0. | |
4512 | */ | |
4513 | outb(0, (iobase + 1)); | |
4514 | ||
4515 | iack = inb(iobase + XP_IACK); | |
4516 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; | |
4517 | ||
4518 | if (iack & IVR_RXDATA) | |
4519 | stl_sc26198rxisr(portp, iack); | |
4520 | else if (iack & IVR_TXDATA) | |
4521 | stl_sc26198txisr(portp); | |
4522 | else | |
4523 | stl_sc26198otherisr(portp, iack); | |
b65b5b59 AC |
4524 | |
4525 | spin_unlock(&brd_lock); | |
1da177e4 LT |
4526 | } |
4527 | ||
4528 | /*****************************************************************************/ | |
4529 | ||
4530 | /* | |
4531 | * Transmit interrupt handler. This has gotta be fast! Handling TX | |
4532 | * chars is pretty simple, stuff as many as possible from the TX buffer | |
4533 | * into the sc26198 FIFO. | |
4534 | * In practice it is possible that interrupts are enabled but that the | |
4535 | * port has been hung up. Need to handle not having any TX buffer here, | |
4536 | * this is done by using the side effect that head and tail will also | |
4537 | * be NULL if the buffer has been freed. | |
4538 | */ | |
4539 | ||
ca7ed0f2 | 4540 | static void stl_sc26198txisr(struct stlport *portp) |
1da177e4 LT |
4541 | { |
4542 | unsigned int ioaddr; | |
4543 | unsigned char mr0; | |
4544 | int len, stlen; | |
4545 | char *head, *tail; | |
4546 | ||
a0564e14 | 4547 | pr_debug("stl_sc26198txisr(portp=%p)\n", portp); |
1da177e4 LT |
4548 | |
4549 | ioaddr = portp->ioaddr; | |
4550 | head = portp->tx.head; | |
4551 | tail = portp->tx.tail; | |
4552 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
4553 | if ((len == 0) || ((len < STL_TXBUFLOW) && | |
4554 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { | |
4555 | set_bit(ASYI_TXLOW, &portp->istate); | |
4556 | schedule_work(&portp->tqueue); | |
4557 | } | |
4558 | ||
4559 | if (len == 0) { | |
4560 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); | |
4561 | mr0 = inb(ioaddr + XP_DATA); | |
4562 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { | |
4563 | portp->imr &= ~IR_TXRDY; | |
4564 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); | |
4565 | outb(portp->imr, (ioaddr + XP_DATA)); | |
4566 | clear_bit(ASYI_TXBUSY, &portp->istate); | |
4567 | } else { | |
4568 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); | |
4569 | outb(mr0, (ioaddr + XP_DATA)); | |
4570 | } | |
4571 | } else { | |
4572 | len = MIN(len, SC26198_TXFIFOSIZE); | |
4573 | portp->stats.txtotal += len; | |
4574 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); | |
4575 | outb(GTXFIFO, (ioaddr + XP_ADDR)); | |
4576 | outsb((ioaddr + XP_DATA), tail, stlen); | |
4577 | len -= stlen; | |
4578 | tail += stlen; | |
4579 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) | |
4580 | tail = portp->tx.buf; | |
4581 | if (len > 0) { | |
4582 | outsb((ioaddr + XP_DATA), tail, len); | |
4583 | tail += len; | |
4584 | } | |
4585 | portp->tx.tail = tail; | |
4586 | } | |
4587 | } | |
4588 | ||
4589 | /*****************************************************************************/ | |
4590 | ||
4591 | /* | |
4592 | * Receive character interrupt handler. Determine if we have good chars | |
4593 | * or bad chars and then process appropriately. Good chars are easy | |
4594 | * just shove the lot into the RX buffer and set all status byte to 0. | |
4595 | * If a bad RX char then process as required. This routine needs to be | |
4596 | * fast! In practice it is possible that we get an interrupt on a port | |
4597 | * that is closed. This can happen on hangups - since they completely | |
4598 | * shutdown a port not in user context. Need to handle this case. | |
4599 | */ | |
4600 | ||
ca7ed0f2 | 4601 | static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack) |
1da177e4 LT |
4602 | { |
4603 | struct tty_struct *tty; | |
4604 | unsigned int len, buflen, ioaddr; | |
4605 | ||
a0564e14 | 4606 | pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack); |
1da177e4 LT |
4607 | |
4608 | tty = portp->tty; | |
4609 | ioaddr = portp->ioaddr; | |
4610 | outb(GIBCR, (ioaddr + XP_ADDR)); | |
4611 | len = inb(ioaddr + XP_DATA) + 1; | |
4612 | ||
4613 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { | |
33f0f88f | 4614 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
1da177e4 LT |
4615 | len = MIN(len, sizeof(stl_unwanted)); |
4616 | outb(GRXFIFO, (ioaddr + XP_ADDR)); | |
4617 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); | |
4618 | portp->stats.rxlost += len; | |
4619 | portp->stats.rxtotal += len; | |
4620 | } else { | |
4621 | len = MIN(len, buflen); | |
4622 | if (len > 0) { | |
33f0f88f | 4623 | unsigned char *ptr; |
1da177e4 | 4624 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
33f0f88f AC |
4625 | tty_prepare_flip_string(tty, &ptr, len); |
4626 | insb((ioaddr + XP_DATA), ptr, len); | |
1da177e4 LT |
4627 | tty_schedule_flip(tty); |
4628 | portp->stats.rxtotal += len; | |
4629 | } | |
4630 | } | |
4631 | } else { | |
4632 | stl_sc26198rxbadchars(portp); | |
4633 | } | |
4634 | ||
4635 | /* | |
4636 | * If we are TX flow controlled and in IXANY mode then we may need | |
4637 | * to unflow control here. We gotta do this because of the automatic | |
4638 | * flow control modes of the sc26198. | |
4639 | */ | |
4640 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { | |
615e4a71 JS |
4641 | if ((tty != NULL) && |
4642 | (tty->termios != NULL) && | |
1da177e4 LT |
4643 | (tty->termios->c_iflag & IXANY)) { |
4644 | stl_sc26198txunflow(portp, tty); | |
4645 | } | |
4646 | } | |
4647 | } | |
4648 | ||
4649 | /*****************************************************************************/ | |
4650 | ||
4651 | /* | |
4652 | * Process an RX bad character. | |
4653 | */ | |
4654 | ||
60be4810 | 4655 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch) |
1da177e4 LT |
4656 | { |
4657 | struct tty_struct *tty; | |
4658 | unsigned int ioaddr; | |
4659 | ||
4660 | tty = portp->tty; | |
4661 | ioaddr = portp->ioaddr; | |
4662 | ||
4663 | if (status & SR_RXPARITY) | |
4664 | portp->stats.rxparity++; | |
4665 | if (status & SR_RXFRAMING) | |
4666 | portp->stats.rxframing++; | |
4667 | if (status & SR_RXOVERRUN) | |
4668 | portp->stats.rxoverrun++; | |
4669 | if (status & SR_RXBREAK) | |
4670 | portp->stats.rxbreaks++; | |
4671 | ||
615e4a71 | 4672 | if ((tty != NULL) && |
1da177e4 LT |
4673 | ((portp->rxignoremsk & status) == 0)) { |
4674 | if (portp->rxmarkmsk & status) { | |
4675 | if (status & SR_RXBREAK) { | |
4676 | status = TTY_BREAK; | |
4677 | if (portp->flags & ASYNC_SAK) { | |
4678 | do_SAK(tty); | |
4679 | BRDENABLE(portp->brdnr, portp->pagenr); | |
4680 | } | |
4681 | } else if (status & SR_RXPARITY) { | |
4682 | status = TTY_PARITY; | |
4683 | } else if (status & SR_RXFRAMING) { | |
4684 | status = TTY_FRAME; | |
4685 | } else if(status & SR_RXOVERRUN) { | |
4686 | status = TTY_OVERRUN; | |
4687 | } else { | |
4688 | status = 0; | |
4689 | } | |
4690 | } else { | |
4691 | status = 0; | |
4692 | } | |
4693 | ||
33f0f88f AC |
4694 | tty_insert_flip_char(tty, ch, status); |
4695 | tty_schedule_flip(tty); | |
1da177e4 LT |
4696 | |
4697 | if (status == 0) | |
4698 | portp->stats.rxtotal++; | |
4699 | } | |
4700 | } | |
4701 | ||
4702 | /*****************************************************************************/ | |
4703 | ||
4704 | /* | |
4705 | * Process all characters in the RX FIFO of the UART. Check all char | |
4706 | * status bytes as well, and process as required. We need to check | |
4707 | * all bytes in the FIFO, in case some more enter the FIFO while we | |
4708 | * are here. To get the exact character error type we need to switch | |
4709 | * into CHAR error mode (that is why we need to make sure we empty | |
4710 | * the FIFO). | |
4711 | */ | |
4712 | ||
ca7ed0f2 | 4713 | static void stl_sc26198rxbadchars(struct stlport *portp) |
1da177e4 LT |
4714 | { |
4715 | unsigned char status, mr1; | |
4716 | char ch; | |
4717 | ||
4718 | /* | |
4719 | * To get the precise error type for each character we must switch | |
4720 | * back into CHAR error mode. | |
4721 | */ | |
4722 | mr1 = stl_sc26198getreg(portp, MR1); | |
4723 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); | |
4724 | ||
4725 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { | |
4726 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); | |
4727 | ch = stl_sc26198getreg(portp, RXFIFO); | |
4728 | stl_sc26198rxbadch(portp, status, ch); | |
4729 | } | |
4730 | ||
4731 | /* | |
4732 | * To get correct interrupt class we must switch back into BLOCK | |
4733 | * error mode. | |
4734 | */ | |
4735 | stl_sc26198setreg(portp, MR1, mr1); | |
4736 | } | |
4737 | ||
4738 | /*****************************************************************************/ | |
4739 | ||
4740 | /* | |
4741 | * Other interrupt handler. This includes modem signals, flow | |
4742 | * control actions, etc. Most stuff is left to off-level interrupt | |
4743 | * processing time. | |
4744 | */ | |
4745 | ||
ca7ed0f2 | 4746 | static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack) |
1da177e4 LT |
4747 | { |
4748 | unsigned char cir, ipr, xisr; | |
4749 | ||
a0564e14 | 4750 | pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack); |
1da177e4 LT |
4751 | |
4752 | cir = stl_sc26198getglobreg(portp, CIR); | |
4753 | ||
4754 | switch (cir & CIR_SUBTYPEMASK) { | |
4755 | case CIR_SUBCOS: | |
4756 | ipr = stl_sc26198getreg(portp, IPR); | |
4757 | if (ipr & IPR_DCDCHANGE) { | |
4758 | set_bit(ASYI_DCDCHANGE, &portp->istate); | |
4759 | schedule_work(&portp->tqueue); | |
4760 | portp->stats.modem++; | |
4761 | } | |
4762 | break; | |
4763 | case CIR_SUBXONXOFF: | |
4764 | xisr = stl_sc26198getreg(portp, XISR); | |
4765 | if (xisr & XISR_RXXONGOT) { | |
4766 | set_bit(ASYI_TXFLOWED, &portp->istate); | |
4767 | portp->stats.txxoff++; | |
4768 | } | |
4769 | if (xisr & XISR_RXXOFFGOT) { | |
4770 | clear_bit(ASYI_TXFLOWED, &portp->istate); | |
4771 | portp->stats.txxon++; | |
4772 | } | |
4773 | break; | |
4774 | case CIR_SUBBREAK: | |
4775 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); | |
4776 | stl_sc26198rxbadchars(portp); | |
4777 | break; | |
4778 | default: | |
4779 | break; | |
4780 | } | |
4781 | } | |
4782 | ||
23b85a15 JS |
4783 | /* |
4784 | * Loadable module initialization stuff. | |
4785 | */ | |
4786 | static int __init stallion_module_init(void) | |
4787 | { | |
b1b84fe0 | 4788 | unsigned int i, retval; |
23b85a15 JS |
4789 | |
4790 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); | |
4791 | ||
4792 | spin_lock_init(&stallion_lock); | |
4793 | spin_lock_init(&brd_lock); | |
4794 | ||
4795 | stl_initbrds(); | |
4796 | ||
b1b84fe0 JS |
4797 | retval = pci_register_driver(&stl_pcidriver); |
4798 | if (retval) | |
4799 | goto err; | |
4800 | ||
23b85a15 JS |
4801 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
4802 | if (!stl_serial) | |
4803 | return -1; | |
4804 | ||
4805 | /* | |
4806 | * Set up a character driver for per board stuff. This is mainly used | |
4807 | * to do stats ioctls on the ports. | |
4808 | */ | |
4809 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) | |
4810 | printk("STALLION: failed to register serial board device\n"); | |
4811 | ||
4812 | stallion_class = class_create(THIS_MODULE, "staliomem"); | |
4813 | for (i = 0; i < 4; i++) | |
4814 | class_device_create(stallion_class, NULL, | |
4815 | MKDEV(STL_SIOMEMMAJOR, i), NULL, | |
4816 | "staliomem%d", i); | |
4817 | ||
4818 | stl_serial->owner = THIS_MODULE; | |
4819 | stl_serial->driver_name = stl_drvname; | |
4820 | stl_serial->name = "ttyE"; | |
4821 | stl_serial->major = STL_SERIALMAJOR; | |
4822 | stl_serial->minor_start = 0; | |
4823 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; | |
4824 | stl_serial->subtype = SERIAL_TYPE_NORMAL; | |
4825 | stl_serial->init_termios = stl_deftermios; | |
4826 | stl_serial->flags = TTY_DRIVER_REAL_RAW; | |
4827 | tty_set_operations(stl_serial, &stl_ops); | |
4828 | ||
4829 | if (tty_register_driver(stl_serial)) { | |
4830 | put_tty_driver(stl_serial); | |
4831 | printk("STALLION: failed to register serial driver\n"); | |
4832 | return -1; | |
4833 | } | |
4834 | ||
4835 | return 0; | |
b1b84fe0 JS |
4836 | err: |
4837 | return retval; | |
23b85a15 JS |
4838 | } |
4839 | ||
4840 | static void __exit stallion_module_exit(void) | |
4841 | { | |
4842 | struct stlbrd *brdp; | |
b1b84fe0 | 4843 | int i; |
23b85a15 JS |
4844 | |
4845 | pr_debug("cleanup_module()\n"); | |
4846 | ||
4847 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, | |
4848 | stl_drvversion); | |
4849 | ||
4850 | /* | |
4851 | * Free up all allocated resources used by the ports. This includes | |
4852 | * memory and interrupts. As part of this process we will also do | |
4853 | * a hangup on every open port - to try to flush out any processes | |
4854 | * hanging onto ports. | |
4855 | */ | |
4856 | i = tty_unregister_driver(stl_serial); | |
4857 | put_tty_driver(stl_serial); | |
4858 | if (i) { | |
4859 | printk("STALLION: failed to un-register tty driver, " | |
4860 | "errno=%d\n", -i); | |
4861 | return; | |
4862 | } | |
4863 | for (i = 0; i < 4; i++) | |
4864 | class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); | |
4865 | if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) | |
4866 | printk("STALLION: failed to un-register serial memory device, " | |
4867 | "errno=%d\n", -i); | |
4868 | class_destroy(stallion_class); | |
4869 | ||
b1b84fe0 JS |
4870 | pci_unregister_driver(&stl_pcidriver); |
4871 | ||
23b85a15 JS |
4872 | for (i = 0; (i < stl_nrbrds); i++) { |
4873 | if ((brdp = stl_brds[i]) == NULL) | |
4874 | continue; | |
4875 | ||
4876 | free_irq(brdp->irq, brdp); | |
4877 | ||
b1b84fe0 | 4878 | stl_cleanup_panels(brdp); |
23b85a15 JS |
4879 | |
4880 | release_region(brdp->ioaddr1, brdp->iosize1); | |
4881 | if (brdp->iosize2 > 0) | |
4882 | release_region(brdp->ioaddr2, brdp->iosize2); | |
4883 | ||
4884 | kfree(brdp); | |
4885 | stl_brds[i] = NULL; | |
4886 | } | |
4887 | } | |
4888 | ||
4889 | module_init(stallion_module_init); | |
4890 | module_exit(stallion_module_exit); | |
4891 | ||
4892 | MODULE_AUTHOR("Greg Ungerer"); | |
4893 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); | |
4894 | MODULE_LICENSE("GPL"); |