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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> | |
843b568c | 44 | #include <linux/ctype.h> |
1da177e4 LT |
45 | |
46 | #include <asm/io.h> | |
47 | #include <asm/uaccess.h> | |
48 | ||
1da177e4 | 49 | #include <linux/pci.h> |
1da177e4 LT |
50 | |
51 | /*****************************************************************************/ | |
52 | ||
53 | /* | |
54 | * Define different board types. Use the standard Stallion "assigned" | |
55 | * board numbers. Boards supported in this driver are abbreviated as | |
56 | * EIO = EasyIO and ECH = EasyConnection 8/32. | |
57 | */ | |
58 | #define BRD_EASYIO 20 | |
59 | #define BRD_ECH 21 | |
60 | #define BRD_ECHMC 22 | |
61 | #define BRD_ECHPCI 26 | |
62 | #define BRD_ECH64PCI 27 | |
63 | #define BRD_EASYIOPCI 28 | |
64 | ||
843b568c | 65 | struct stlconf { |
6b2c9457 | 66 | unsigned int brdtype; |
1da177e4 LT |
67 | int ioaddr1; |
68 | int ioaddr2; | |
69 | unsigned long memaddr; | |
70 | int irq; | |
71 | int irqtype; | |
1da177e4 LT |
72 | }; |
73 | ||
843b568c | 74 | static unsigned int stl_nrbrds; |
1da177e4 LT |
75 | |
76 | /*****************************************************************************/ | |
77 | ||
78 | /* | |
79 | * Define some important driver characteristics. Device major numbers | |
80 | * allocated as per Linux Device Registry. | |
81 | */ | |
82 | #ifndef STL_SIOMEMMAJOR | |
83 | #define STL_SIOMEMMAJOR 28 | |
84 | #endif | |
85 | #ifndef STL_SERIALMAJOR | |
86 | #define STL_SERIALMAJOR 24 | |
87 | #endif | |
88 | #ifndef STL_CALLOUTMAJOR | |
89 | #define STL_CALLOUTMAJOR 25 | |
90 | #endif | |
91 | ||
92 | /* | |
93 | * Set the TX buffer size. Bigger is better, but we don't want | |
94 | * to chew too much memory with buffers! | |
95 | */ | |
96 | #define STL_TXBUFLOW 512 | |
97 | #define STL_TXBUFSIZE 4096 | |
98 | ||
99 | /*****************************************************************************/ | |
100 | ||
101 | /* | |
102 | * Define our local driver identity first. Set up stuff to deal with | |
103 | * all the local structures required by a serial tty driver. | |
104 | */ | |
105 | static char *stl_drvtitle = "Stallion Multiport Serial Driver"; | |
106 | static char *stl_drvname = "stallion"; | |
107 | static char *stl_drvversion = "5.6.0"; | |
108 | ||
109 | static struct tty_driver *stl_serial; | |
110 | ||
1da177e4 LT |
111 | /* |
112 | * Define a local default termios struct. All ports will be created | |
113 | * with this termios initially. Basically all it defines is a raw port | |
114 | * at 9600, 8 data bits, 1 stop bit. | |
115 | */ | |
606d099c | 116 | static struct ktermios stl_deftermios = { |
1da177e4 LT |
117 | .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), |
118 | .c_cc = INIT_C_CC, | |
606d099c AC |
119 | .c_ispeed = 9600, |
120 | .c_ospeed = 9600, | |
1da177e4 LT |
121 | }; |
122 | ||
1da177e4 LT |
123 | /* |
124 | * Define global place to put buffer overflow characters. | |
125 | */ | |
126 | static char stl_unwanted[SC26198_RXFIFOSIZE]; | |
127 | ||
128 | /*****************************************************************************/ | |
129 | ||
79cfe7ab | 130 | static DEFINE_MUTEX(stl_brdslock); |
ca7ed0f2 | 131 | static struct stlbrd *stl_brds[STL_MAXBRDS]; |
1da177e4 LT |
132 | |
133 | /* | |
134 | * Per board state flags. Used with the state field of the board struct. | |
135 | * Not really much here! | |
136 | */ | |
137 | #define BRD_FOUND 0x1 | |
fc06b5cf JS |
138 | #define STL_PROBED 0x2 |
139 | ||
1da177e4 LT |
140 | |
141 | /* | |
142 | * Define the port structure istate flags. These set of flags are | |
143 | * modified at interrupt time - so setting and reseting them needs | |
144 | * to be atomic. Use the bit clear/setting routines for this. | |
145 | */ | |
146 | #define ASYI_TXBUSY 1 | |
147 | #define ASYI_TXLOW 2 | |
148 | #define ASYI_DCDCHANGE 3 | |
149 | #define ASYI_TXFLOWED 4 | |
150 | ||
151 | /* | |
152 | * Define an array of board names as printable strings. Handy for | |
153 | * referencing boards when printing trace and stuff. | |
154 | */ | |
155 | static char *stl_brdnames[] = { | |
615e4a71 JS |
156 | NULL, |
157 | NULL, | |
158 | NULL, | |
159 | NULL, | |
160 | NULL, | |
161 | NULL, | |
162 | NULL, | |
163 | NULL, | |
164 | NULL, | |
165 | NULL, | |
166 | NULL, | |
167 | NULL, | |
168 | NULL, | |
169 | NULL, | |
170 | NULL, | |
171 | NULL, | |
172 | NULL, | |
173 | NULL, | |
174 | NULL, | |
175 | NULL, | |
1da177e4 LT |
176 | "EasyIO", |
177 | "EC8/32-AT", | |
178 | "EC8/32-MC", | |
615e4a71 JS |
179 | NULL, |
180 | NULL, | |
181 | NULL, | |
1da177e4 LT |
182 | "EC8/32-PCI", |
183 | "EC8/64-PCI", | |
184 | "EasyIO-PCI", | |
185 | }; | |
186 | ||
187 | /*****************************************************************************/ | |
188 | ||
189 | /* | |
190 | * Define some string labels for arguments passed from the module | |
191 | * load line. These allow for easy board definitions, and easy | |
192 | * modification of the io, memory and irq resoucres. | |
193 | */ | |
6b2c9457 | 194 | static unsigned int stl_nargs; |
1da177e4 LT |
195 | static char *board0[4]; |
196 | static char *board1[4]; | |
197 | static char *board2[4]; | |
198 | static char *board3[4]; | |
199 | ||
200 | static char **stl_brdsp[] = { | |
201 | (char **) &board0, | |
202 | (char **) &board1, | |
203 | (char **) &board2, | |
204 | (char **) &board3 | |
205 | }; | |
206 | ||
207 | /* | |
208 | * Define a set of common board names, and types. This is used to | |
209 | * parse any module arguments. | |
210 | */ | |
211 | ||
ca7ed0f2 | 212 | static struct { |
1da177e4 LT |
213 | char *name; |
214 | int type; | |
ca7ed0f2 | 215 | } stl_brdstr[] = { |
1da177e4 LT |
216 | { "easyio", BRD_EASYIO }, |
217 | { "eio", BRD_EASYIO }, | |
218 | { "20", BRD_EASYIO }, | |
219 | { "ec8/32", BRD_ECH }, | |
220 | { "ec8/32-at", BRD_ECH }, | |
221 | { "ec8/32-isa", BRD_ECH }, | |
222 | { "ech", BRD_ECH }, | |
223 | { "echat", BRD_ECH }, | |
224 | { "21", BRD_ECH }, | |
225 | { "ec8/32-mc", BRD_ECHMC }, | |
226 | { "ec8/32-mca", BRD_ECHMC }, | |
227 | { "echmc", BRD_ECHMC }, | |
228 | { "echmca", BRD_ECHMC }, | |
229 | { "22", BRD_ECHMC }, | |
230 | { "ec8/32-pc", BRD_ECHPCI }, | |
231 | { "ec8/32-pci", BRD_ECHPCI }, | |
232 | { "26", BRD_ECHPCI }, | |
233 | { "ec8/64-pc", BRD_ECH64PCI }, | |
234 | { "ec8/64-pci", BRD_ECH64PCI }, | |
235 | { "ech-pci", BRD_ECH64PCI }, | |
236 | { "echpci", BRD_ECH64PCI }, | |
237 | { "echpc", BRD_ECH64PCI }, | |
238 | { "27", BRD_ECH64PCI }, | |
239 | { "easyio-pc", BRD_EASYIOPCI }, | |
240 | { "easyio-pci", BRD_EASYIOPCI }, | |
241 | { "eio-pci", BRD_EASYIOPCI }, | |
242 | { "eiopci", BRD_EASYIOPCI }, | |
243 | { "28", BRD_EASYIOPCI }, | |
244 | }; | |
245 | ||
246 | /* | |
247 | * Define the module agruments. | |
248 | */ | |
1da177e4 LT |
249 | |
250 | module_param_array(board0, charp, &stl_nargs, 0); | |
251 | MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
252 | module_param_array(board1, charp, &stl_nargs, 0); | |
253 | MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
254 | module_param_array(board2, charp, &stl_nargs, 0); | |
255 | MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
256 | module_param_array(board3, charp, &stl_nargs, 0); | |
257 | MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); | |
258 | ||
259 | /*****************************************************************************/ | |
260 | ||
261 | /* | |
262 | * Hardware ID bits for the EasyIO and ECH boards. These defines apply | |
263 | * to the directly accessible io ports of these boards (not the uarts - | |
264 | * they are in cd1400.h and sc26198.h). | |
265 | */ | |
266 | #define EIO_8PORTRS 0x04 | |
267 | #define EIO_4PORTRS 0x05 | |
268 | #define EIO_8PORTDI 0x00 | |
269 | #define EIO_8PORTM 0x06 | |
270 | #define EIO_MK3 0x03 | |
271 | #define EIO_IDBITMASK 0x07 | |
272 | ||
273 | #define EIO_BRDMASK 0xf0 | |
274 | #define ID_BRD4 0x10 | |
275 | #define ID_BRD8 0x20 | |
276 | #define ID_BRD16 0x30 | |
277 | ||
278 | #define EIO_INTRPEND 0x08 | |
279 | #define EIO_INTEDGE 0x00 | |
280 | #define EIO_INTLEVEL 0x08 | |
281 | #define EIO_0WS 0x10 | |
282 | ||
283 | #define ECH_ID 0xa0 | |
284 | #define ECH_IDBITMASK 0xe0 | |
285 | #define ECH_BRDENABLE 0x08 | |
286 | #define ECH_BRDDISABLE 0x00 | |
287 | #define ECH_INTENABLE 0x01 | |
288 | #define ECH_INTDISABLE 0x00 | |
289 | #define ECH_INTLEVEL 0x02 | |
290 | #define ECH_INTEDGE 0x00 | |
291 | #define ECH_INTRPEND 0x01 | |
292 | #define ECH_BRDRESET 0x01 | |
293 | ||
294 | #define ECHMC_INTENABLE 0x01 | |
295 | #define ECHMC_BRDRESET 0x02 | |
296 | ||
297 | #define ECH_PNLSTATUS 2 | |
298 | #define ECH_PNL16PORT 0x20 | |
299 | #define ECH_PNLIDMASK 0x07 | |
300 | #define ECH_PNLXPID 0x40 | |
301 | #define ECH_PNLINTRPEND 0x80 | |
302 | ||
303 | #define ECH_ADDR2MASK 0x1e0 | |
304 | ||
305 | /* | |
306 | * Define the vector mapping bits for the programmable interrupt board | |
307 | * hardware. These bits encode the interrupt for the board to use - it | |
308 | * is software selectable (except the EIO-8M). | |
309 | */ | |
310 | static unsigned char stl_vecmap[] = { | |
311 | 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, | |
312 | 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 | |
313 | }; | |
314 | ||
b65b5b59 AC |
315 | /* |
316 | * Lock ordering is that you may not take stallion_lock holding | |
317 | * brd_lock. | |
318 | */ | |
319 | ||
320 | static spinlock_t brd_lock; /* Guard the board mapping */ | |
321 | static spinlock_t stallion_lock; /* Guard the tty driver */ | |
322 | ||
1da177e4 LT |
323 | /* |
324 | * Set up enable and disable macros for the ECH boards. They require | |
325 | * the secondary io address space to be activated and deactivated. | |
326 | * This way all ECH boards can share their secondary io region. | |
327 | * If this is an ECH-PCI board then also need to set the page pointer | |
328 | * to point to the correct page. | |
329 | */ | |
330 | #define BRDENABLE(brdnr,pagenr) \ | |
331 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ | |
332 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ | |
333 | stl_brds[(brdnr)]->ioctrl); \ | |
334 | else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ | |
335 | outb((pagenr), stl_brds[(brdnr)]->ioctrl); | |
336 | ||
337 | #define BRDDISABLE(brdnr) \ | |
338 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ | |
339 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ | |
340 | stl_brds[(brdnr)]->ioctrl); | |
341 | ||
342 | #define STL_CD1400MAXBAUD 230400 | |
343 | #define STL_SC26198MAXBAUD 460800 | |
344 | ||
345 | #define STL_BAUDBASE 115200 | |
346 | #define STL_CLOSEDELAY (5 * HZ / 10) | |
347 | ||
348 | /*****************************************************************************/ | |
349 | ||
1da177e4 LT |
350 | /* |
351 | * Define the Stallion PCI vendor and device IDs. | |
352 | */ | |
353 | #ifndef PCI_VENDOR_ID_STALLION | |
354 | #define PCI_VENDOR_ID_STALLION 0x124d | |
355 | #endif | |
356 | #ifndef PCI_DEVICE_ID_ECHPCI832 | |
357 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 | |
358 | #endif | |
359 | #ifndef PCI_DEVICE_ID_ECHPCI864 | |
360 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 | |
361 | #endif | |
362 | #ifndef PCI_DEVICE_ID_EIOPCI | |
363 | #define PCI_DEVICE_ID_EIOPCI 0x0003 | |
364 | #endif | |
365 | ||
366 | /* | |
367 | * Define structure to hold all Stallion PCI boards. | |
368 | */ | |
1da177e4 | 369 | |
b1b84fe0 JS |
370 | static struct pci_device_id stl_pcibrds[] = { |
371 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864), | |
372 | .driver_data = BRD_ECH64PCI }, | |
373 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI), | |
374 | .driver_data = BRD_EASYIOPCI }, | |
375 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832), | |
376 | .driver_data = BRD_ECHPCI }, | |
377 | { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410), | |
378 | .driver_data = BRD_ECHPCI }, | |
379 | { } | |
380 | }; | |
381 | MODULE_DEVICE_TABLE(pci, stl_pcibrds); | |
1da177e4 LT |
382 | |
383 | /*****************************************************************************/ | |
384 | ||
385 | /* | |
386 | * Define macros to extract a brd/port number from a minor number. | |
387 | */ | |
388 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) | |
389 | #define MINOR2PORT(min) ((min) & 0x3f) | |
390 | ||
391 | /* | |
392 | * Define a baud rate table that converts termios baud rate selector | |
393 | * into the actual baud rate value. All baud rate calculations are | |
394 | * based on the actual baud rate required. | |
395 | */ | |
396 | static unsigned int stl_baudrates[] = { | |
397 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
398 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 | |
399 | }; | |
400 | ||
1da177e4 LT |
401 | /*****************************************************************************/ |
402 | ||
403 | /* | |
404 | * Declare all those functions in this driver! | |
405 | */ | |
406 | ||
1da177e4 | 407 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); |
ca7ed0f2 | 408 | static int stl_brdinit(struct stlbrd *brdp); |
ca7ed0f2 JS |
409 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp); |
410 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp); | |
ca7ed0f2 | 411 | static int stl_waitcarrier(struct stlport *portp, struct file *filp); |
1da177e4 | 412 | |
1da177e4 LT |
413 | /* |
414 | * CD1400 uart specific handling functions. | |
415 | */ | |
ca7ed0f2 JS |
416 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value); |
417 | static int stl_cd1400getreg(struct stlport *portp, int regnr); | |
418 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value); | |
419 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp); | |
420 | static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); | |
606d099c | 421 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp); |
ca7ed0f2 JS |
422 | static int stl_cd1400getsignals(struct stlport *portp); |
423 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts); | |
424 | static void stl_cd1400ccrwait(struct stlport *portp); | |
425 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx); | |
426 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx); | |
427 | static void stl_cd1400disableintrs(struct stlport *portp); | |
428 | static void stl_cd1400sendbreak(struct stlport *portp, int len); | |
429 | static void stl_cd1400flowctrl(struct stlport *portp, int state); | |
430 | static void stl_cd1400sendflow(struct stlport *portp, int state); | |
431 | static void stl_cd1400flush(struct stlport *portp); | |
432 | static int stl_cd1400datastate(struct stlport *portp); | |
433 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase); | |
434 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase); | |
435 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr); | |
436 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr); | |
437 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr); | |
438 | ||
439 | static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr); | |
1da177e4 LT |
440 | |
441 | /* | |
442 | * SC26198 uart specific handling functions. | |
443 | */ | |
ca7ed0f2 JS |
444 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value); |
445 | static int stl_sc26198getreg(struct stlport *portp, int regnr); | |
446 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value); | |
447 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr); | |
448 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp); | |
449 | static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); | |
606d099c | 450 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp); |
ca7ed0f2 JS |
451 | static int stl_sc26198getsignals(struct stlport *portp); |
452 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts); | |
453 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx); | |
454 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx); | |
455 | static void stl_sc26198disableintrs(struct stlport *portp); | |
456 | static void stl_sc26198sendbreak(struct stlport *portp, int len); | |
457 | static void stl_sc26198flowctrl(struct stlport *portp, int state); | |
458 | static void stl_sc26198sendflow(struct stlport *portp, int state); | |
459 | static void stl_sc26198flush(struct stlport *portp); | |
460 | static int stl_sc26198datastate(struct stlport *portp); | |
461 | static void stl_sc26198wait(struct stlport *portp); | |
462 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty); | |
463 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase); | |
464 | static void stl_sc26198txisr(struct stlport *port); | |
465 | static void stl_sc26198rxisr(struct stlport *port, unsigned int iack); | |
466 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch); | |
467 | static void stl_sc26198rxbadchars(struct stlport *portp); | |
468 | static void stl_sc26198otherisr(struct stlport *port, unsigned int iack); | |
1da177e4 LT |
469 | |
470 | /*****************************************************************************/ | |
471 | ||
472 | /* | |
473 | * Generic UART support structure. | |
474 | */ | |
475 | typedef struct uart { | |
ca7ed0f2 JS |
476 | int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp); |
477 | void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); | |
606d099c | 478 | void (*setport)(struct stlport *portp, struct ktermios *tiosp); |
ca7ed0f2 JS |
479 | int (*getsignals)(struct stlport *portp); |
480 | void (*setsignals)(struct stlport *portp, int dtr, int rts); | |
481 | void (*enablerxtx)(struct stlport *portp, int rx, int tx); | |
482 | void (*startrxtx)(struct stlport *portp, int rx, int tx); | |
483 | void (*disableintrs)(struct stlport *portp); | |
484 | void (*sendbreak)(struct stlport *portp, int len); | |
485 | void (*flowctrl)(struct stlport *portp, int state); | |
486 | void (*sendflow)(struct stlport *portp, int state); | |
487 | void (*flush)(struct stlport *portp); | |
488 | int (*datastate)(struct stlport *portp); | |
489 | void (*intr)(struct stlpanel *panelp, unsigned int iobase); | |
1da177e4 LT |
490 | } uart_t; |
491 | ||
492 | /* | |
493 | * Define some macros to make calling these functions nice and clean. | |
494 | */ | |
495 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) | |
496 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) | |
497 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) | |
498 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) | |
499 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) | |
500 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) | |
501 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) | |
502 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) | |
503 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) | |
504 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) | |
505 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) | |
506 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) | |
507 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) | |
508 | ||
509 | /*****************************************************************************/ | |
510 | ||
511 | /* | |
512 | * CD1400 UART specific data initialization. | |
513 | */ | |
514 | static uart_t stl_cd1400uart = { | |
515 | stl_cd1400panelinit, | |
516 | stl_cd1400portinit, | |
517 | stl_cd1400setport, | |
518 | stl_cd1400getsignals, | |
519 | stl_cd1400setsignals, | |
520 | stl_cd1400enablerxtx, | |
521 | stl_cd1400startrxtx, | |
522 | stl_cd1400disableintrs, | |
523 | stl_cd1400sendbreak, | |
524 | stl_cd1400flowctrl, | |
525 | stl_cd1400sendflow, | |
526 | stl_cd1400flush, | |
527 | stl_cd1400datastate, | |
528 | stl_cd1400eiointr | |
529 | }; | |
530 | ||
531 | /* | |
532 | * Define the offsets within the register bank of a cd1400 based panel. | |
533 | * These io address offsets are common to the EasyIO board as well. | |
534 | */ | |
535 | #define EREG_ADDR 0 | |
536 | #define EREG_DATA 4 | |
537 | #define EREG_RXACK 5 | |
538 | #define EREG_TXACK 6 | |
539 | #define EREG_MDACK 7 | |
540 | ||
541 | #define EREG_BANKSIZE 8 | |
542 | ||
543 | #define CD1400_CLK 25000000 | |
544 | #define CD1400_CLK8M 20000000 | |
545 | ||
546 | /* | |
547 | * Define the cd1400 baud rate clocks. These are used when calculating | |
548 | * what clock and divisor to use for the required baud rate. Also | |
549 | * define the maximum baud rate allowed, and the default base baud. | |
550 | */ | |
551 | static int stl_cd1400clkdivs[] = { | |
552 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 | |
553 | }; | |
554 | ||
555 | /*****************************************************************************/ | |
556 | ||
557 | /* | |
558 | * SC26198 UART specific data initization. | |
559 | */ | |
560 | static uart_t stl_sc26198uart = { | |
561 | stl_sc26198panelinit, | |
562 | stl_sc26198portinit, | |
563 | stl_sc26198setport, | |
564 | stl_sc26198getsignals, | |
565 | stl_sc26198setsignals, | |
566 | stl_sc26198enablerxtx, | |
567 | stl_sc26198startrxtx, | |
568 | stl_sc26198disableintrs, | |
569 | stl_sc26198sendbreak, | |
570 | stl_sc26198flowctrl, | |
571 | stl_sc26198sendflow, | |
572 | stl_sc26198flush, | |
573 | stl_sc26198datastate, | |
574 | stl_sc26198intr | |
575 | }; | |
576 | ||
577 | /* | |
578 | * Define the offsets within the register bank of a sc26198 based panel. | |
579 | */ | |
580 | #define XP_DATA 0 | |
581 | #define XP_ADDR 1 | |
582 | #define XP_MODID 2 | |
583 | #define XP_STATUS 2 | |
584 | #define XP_IACK 3 | |
585 | ||
586 | #define XP_BANKSIZE 4 | |
587 | ||
588 | /* | |
589 | * Define the sc26198 baud rate table. Offsets within the table | |
590 | * represent the actual baud rate selector of sc26198 registers. | |
591 | */ | |
592 | static unsigned int sc26198_baudtable[] = { | |
593 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, | |
594 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, | |
595 | 230400, 460800, 921600 | |
596 | }; | |
597 | ||
fe971071 | 598 | #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable) |
1da177e4 LT |
599 | |
600 | /*****************************************************************************/ | |
601 | ||
602 | /* | |
603 | * Define the driver info for a user level control device. Used mainly | |
604 | * to get at port stats - only not using the port device itself. | |
605 | */ | |
62322d25 | 606 | static const struct file_operations stl_fsiomem = { |
1da177e4 LT |
607 | .owner = THIS_MODULE, |
608 | .ioctl = stl_memioctl, | |
609 | }; | |
610 | ||
ca8eca68 | 611 | static struct class *stallion_class; |
1da177e4 | 612 | |
1da177e4 LT |
613 | /* |
614 | * Check for any arguments passed in on the module load command line. | |
615 | */ | |
616 | ||
1da177e4 LT |
617 | /*****************************************************************************/ |
618 | ||
1da177e4 LT |
619 | /* |
620 | * Parse the supplied argument string, into the board conf struct. | |
621 | */ | |
622 | ||
40e82652 | 623 | static int __init stl_parsebrd(struct stlconf *confp, char **argp) |
1da177e4 LT |
624 | { |
625 | char *sp; | |
6b2c9457 | 626 | unsigned int i; |
1da177e4 | 627 | |
a0564e14 | 628 | pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp); |
1da177e4 | 629 | |
615e4a71 | 630 | if ((argp[0] == NULL) || (*argp[0] == 0)) |
014c2544 | 631 | return 0; |
1da177e4 | 632 | |
c62429d9 | 633 | for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++) |
843b568c | 634 | *sp = tolower(*sp); |
1da177e4 | 635 | |
c62429d9 | 636 | for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) |
1da177e4 LT |
637 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
638 | break; | |
c62429d9 | 639 | |
fe971071 | 640 | if (i == ARRAY_SIZE(stl_brdstr)) { |
1da177e4 | 641 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
fe971071 | 642 | return 0; |
1da177e4 LT |
643 | } |
644 | ||
645 | confp->brdtype = stl_brdstr[i].type; | |
646 | ||
647 | i = 1; | |
615e4a71 | 648 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
843b568c | 649 | confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0); |
1da177e4 LT |
650 | i++; |
651 | if (confp->brdtype == BRD_ECH) { | |
615e4a71 | 652 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
843b568c | 653 | confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0); |
1da177e4 LT |
654 | i++; |
655 | } | |
615e4a71 | 656 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
843b568c | 657 | confp->irq = simple_strtoul(argp[i], NULL, 0); |
014c2544 | 658 | return 1; |
1da177e4 LT |
659 | } |
660 | ||
661 | /*****************************************************************************/ | |
662 | ||
1da177e4 LT |
663 | /* |
664 | * Allocate a new board structure. Fill out the basic info in it. | |
665 | */ | |
666 | ||
ca7ed0f2 | 667 | static struct stlbrd *stl_allocbrd(void) |
1da177e4 | 668 | { |
ca7ed0f2 | 669 | struct stlbrd *brdp; |
1da177e4 | 670 | |
ca7ed0f2 | 671 | brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL); |
b0b4ed72 | 672 | if (!brdp) { |
b65b5b59 | 673 | printk("STALLION: failed to allocate memory (size=%Zd)\n", |
ca7ed0f2 | 674 | sizeof(struct stlbrd)); |
b0b4ed72 | 675 | return NULL; |
1da177e4 LT |
676 | } |
677 | ||
1da177e4 | 678 | brdp->magic = STL_BOARDMAGIC; |
014c2544 | 679 | return brdp; |
1da177e4 LT |
680 | } |
681 | ||
682 | /*****************************************************************************/ | |
683 | ||
684 | static int stl_open(struct tty_struct *tty, struct file *filp) | |
685 | { | |
ca7ed0f2 JS |
686 | struct stlport *portp; |
687 | struct stlbrd *brdp; | |
6b2c9457 JS |
688 | unsigned int minordev, brdnr, panelnr; |
689 | int portnr, rc; | |
1da177e4 | 690 | |
a0564e14 | 691 | pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name); |
1da177e4 LT |
692 | |
693 | minordev = tty->index; | |
694 | brdnr = MINOR2BRD(minordev); | |
695 | if (brdnr >= stl_nrbrds) | |
014c2544 | 696 | return -ENODEV; |
1da177e4 | 697 | brdp = stl_brds[brdnr]; |
615e4a71 | 698 | if (brdp == NULL) |
014c2544 | 699 | return -ENODEV; |
1da177e4 | 700 | minordev = MINOR2PORT(minordev); |
c62429d9 | 701 | for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) { |
615e4a71 | 702 | if (brdp->panels[panelnr] == NULL) |
1da177e4 LT |
703 | break; |
704 | if (minordev < brdp->panels[panelnr]->nrports) { | |
705 | portnr = minordev; | |
706 | break; | |
707 | } | |
708 | minordev -= brdp->panels[panelnr]->nrports; | |
709 | } | |
710 | if (portnr < 0) | |
014c2544 | 711 | return -ENODEV; |
1da177e4 LT |
712 | |
713 | portp = brdp->panels[panelnr]->ports[portnr]; | |
615e4a71 | 714 | if (portp == NULL) |
014c2544 | 715 | return -ENODEV; |
1da177e4 LT |
716 | |
717 | /* | |
718 | * On the first open of the device setup the port hardware, and | |
719 | * initialize the per port data structure. | |
720 | */ | |
721 | portp->tty = tty; | |
722 | tty->driver_data = portp; | |
723 | portp->refcount++; | |
724 | ||
725 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { | |
b0b4ed72 TK |
726 | if (!portp->tx.buf) { |
727 | portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); | |
728 | if (!portp->tx.buf) | |
014c2544 | 729 | return -ENOMEM; |
1da177e4 LT |
730 | portp->tx.head = portp->tx.buf; |
731 | portp->tx.tail = portp->tx.buf; | |
732 | } | |
733 | stl_setport(portp, tty->termios); | |
734 | portp->sigs = stl_getsignals(portp); | |
735 | stl_setsignals(portp, 1, 1); | |
736 | stl_enablerxtx(portp, 1, 1); | |
737 | stl_startrxtx(portp, 1, 0); | |
738 | clear_bit(TTY_IO_ERROR, &tty->flags); | |
739 | portp->flags |= ASYNC_INITIALIZED; | |
740 | } | |
741 | ||
742 | /* | |
743 | * Check if this port is in the middle of closing. If so then wait | |
744 | * until it is closed then return error status, based on flag settings. | |
745 | * The sleep here does not need interrupt protection since the wakeup | |
746 | * for it is done with the same context. | |
747 | */ | |
748 | if (portp->flags & ASYNC_CLOSING) { | |
749 | interruptible_sleep_on(&portp->close_wait); | |
750 | if (portp->flags & ASYNC_HUP_NOTIFY) | |
014c2544 JJ |
751 | return -EAGAIN; |
752 | return -ERESTARTSYS; | |
1da177e4 LT |
753 | } |
754 | ||
755 | /* | |
756 | * Based on type of open being done check if it can overlap with any | |
757 | * previous opens still in effect. If we are a normal serial device | |
758 | * then also we might have to wait for carrier. | |
759 | */ | |
c62429d9 | 760 | if (!(filp->f_flags & O_NONBLOCK)) |
1da177e4 | 761 | if ((rc = stl_waitcarrier(portp, filp)) != 0) |
014c2544 | 762 | return rc; |
c62429d9 | 763 | |
1da177e4 LT |
764 | portp->flags |= ASYNC_NORMAL_ACTIVE; |
765 | ||
014c2544 | 766 | return 0; |
1da177e4 LT |
767 | } |
768 | ||
769 | /*****************************************************************************/ | |
770 | ||
771 | /* | |
772 | * Possibly need to wait for carrier (DCD signal) to come high. Say | |
773 | * maybe because if we are clocal then we don't need to wait... | |
774 | */ | |
775 | ||
ca7ed0f2 | 776 | static int stl_waitcarrier(struct stlport *portp, struct file *filp) |
1da177e4 LT |
777 | { |
778 | unsigned long flags; | |
779 | int rc, doclocal; | |
780 | ||
a0564e14 | 781 | pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp); |
1da177e4 LT |
782 | |
783 | rc = 0; | |
784 | doclocal = 0; | |
785 | ||
b65b5b59 AC |
786 | spin_lock_irqsave(&stallion_lock, flags); |
787 | ||
1da177e4 LT |
788 | if (portp->tty->termios->c_cflag & CLOCAL) |
789 | doclocal++; | |
790 | ||
1da177e4 LT |
791 | portp->openwaitcnt++; |
792 | if (! tty_hung_up_p(filp)) | |
793 | portp->refcount--; | |
794 | ||
795 | for (;;) { | |
b65b5b59 | 796 | /* Takes brd_lock internally */ |
1da177e4 LT |
797 | stl_setsignals(portp, 1, 1); |
798 | if (tty_hung_up_p(filp) || | |
799 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { | |
800 | if (portp->flags & ASYNC_HUP_NOTIFY) | |
801 | rc = -EBUSY; | |
802 | else | |
803 | rc = -ERESTARTSYS; | |
804 | break; | |
805 | } | |
806 | if (((portp->flags & ASYNC_CLOSING) == 0) && | |
c62429d9 | 807 | (doclocal || (portp->sigs & TIOCM_CD))) |
1da177e4 | 808 | break; |
1da177e4 LT |
809 | if (signal_pending(current)) { |
810 | rc = -ERESTARTSYS; | |
811 | break; | |
812 | } | |
b65b5b59 | 813 | /* FIXME */ |
1da177e4 LT |
814 | interruptible_sleep_on(&portp->open_wait); |
815 | } | |
816 | ||
817 | if (! tty_hung_up_p(filp)) | |
818 | portp->refcount++; | |
819 | portp->openwaitcnt--; | |
b65b5b59 | 820 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 | 821 | |
014c2544 | 822 | return rc; |
1da177e4 LT |
823 | } |
824 | ||
825 | /*****************************************************************************/ | |
826 | ||
96b066b8 JS |
827 | static void stl_flushbuffer(struct tty_struct *tty) |
828 | { | |
829 | struct stlport *portp; | |
830 | ||
831 | pr_debug("stl_flushbuffer(tty=%p)\n", tty); | |
832 | ||
833 | if (tty == NULL) | |
834 | return; | |
835 | portp = tty->driver_data; | |
836 | if (portp == NULL) | |
837 | return; | |
838 | ||
839 | stl_flush(portp); | |
840 | tty_wakeup(tty); | |
841 | } | |
842 | ||
843 | /*****************************************************************************/ | |
844 | ||
845 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) | |
846 | { | |
847 | struct stlport *portp; | |
848 | unsigned long tend; | |
849 | ||
850 | pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout); | |
851 | ||
852 | if (tty == NULL) | |
853 | return; | |
854 | portp = tty->driver_data; | |
855 | if (portp == NULL) | |
856 | return; | |
857 | ||
858 | if (timeout == 0) | |
859 | timeout = HZ; | |
860 | tend = jiffies + timeout; | |
861 | ||
862 | while (stl_datastate(portp)) { | |
863 | if (signal_pending(current)) | |
864 | break; | |
865 | msleep_interruptible(20); | |
866 | if (time_after_eq(jiffies, tend)) | |
867 | break; | |
868 | } | |
869 | } | |
870 | ||
871 | /*****************************************************************************/ | |
872 | ||
1da177e4 LT |
873 | static void stl_close(struct tty_struct *tty, struct file *filp) |
874 | { | |
ca7ed0f2 | 875 | struct stlport *portp; |
1da177e4 LT |
876 | unsigned long flags; |
877 | ||
a0564e14 | 878 | pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp); |
1da177e4 LT |
879 | |
880 | portp = tty->driver_data; | |
615e4a71 | 881 | if (portp == NULL) |
1da177e4 LT |
882 | return; |
883 | ||
b65b5b59 | 884 | spin_lock_irqsave(&stallion_lock, flags); |
1da177e4 | 885 | if (tty_hung_up_p(filp)) { |
b65b5b59 | 886 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
887 | return; |
888 | } | |
889 | if ((tty->count == 1) && (portp->refcount != 1)) | |
890 | portp->refcount = 1; | |
891 | if (portp->refcount-- > 1) { | |
b65b5b59 | 892 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
893 | return; |
894 | } | |
895 | ||
896 | portp->refcount = 0; | |
897 | portp->flags |= ASYNC_CLOSING; | |
898 | ||
899 | /* | |
900 | * May want to wait for any data to drain before closing. The BUSY | |
901 | * flag keeps track of whether we are still sending or not - it is | |
902 | * very accurate for the cd1400, not quite so for the sc26198. | |
903 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) | |
904 | */ | |
905 | tty->closing = 1; | |
b65b5b59 AC |
906 | |
907 | spin_unlock_irqrestore(&stallion_lock, flags); | |
908 | ||
1da177e4 LT |
909 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
910 | tty_wait_until_sent(tty, portp->closing_wait); | |
911 | stl_waituntilsent(tty, (HZ / 2)); | |
912 | ||
b65b5b59 AC |
913 | |
914 | spin_lock_irqsave(&stallion_lock, flags); | |
1da177e4 | 915 | portp->flags &= ~ASYNC_INITIALIZED; |
b65b5b59 AC |
916 | spin_unlock_irqrestore(&stallion_lock, flags); |
917 | ||
1da177e4 LT |
918 | stl_disableintrs(portp); |
919 | if (tty->termios->c_cflag & HUPCL) | |
920 | stl_setsignals(portp, 0, 0); | |
921 | stl_enablerxtx(portp, 0, 0); | |
922 | stl_flushbuffer(tty); | |
923 | portp->istate = 0; | |
615e4a71 | 924 | if (portp->tx.buf != NULL) { |
1da177e4 | 925 | kfree(portp->tx.buf); |
615e4a71 JS |
926 | portp->tx.buf = NULL; |
927 | portp->tx.head = NULL; | |
928 | portp->tx.tail = NULL; | |
1da177e4 LT |
929 | } |
930 | set_bit(TTY_IO_ERROR, &tty->flags); | |
931 | tty_ldisc_flush(tty); | |
932 | ||
933 | tty->closing = 0; | |
615e4a71 | 934 | portp->tty = NULL; |
1da177e4 LT |
935 | |
936 | if (portp->openwaitcnt) { | |
937 | if (portp->close_delay) | |
938 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); | |
939 | wake_up_interruptible(&portp->open_wait); | |
940 | } | |
941 | ||
942 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
943 | wake_up_interruptible(&portp->close_wait); | |
1da177e4 LT |
944 | } |
945 | ||
946 | /*****************************************************************************/ | |
947 | ||
948 | /* | |
949 | * Write routine. Take data and stuff it in to the TX ring queue. | |
950 | * If transmit interrupts are not running then start them. | |
951 | */ | |
952 | ||
953 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
954 | { | |
ca7ed0f2 | 955 | struct stlport *portp; |
1da177e4 LT |
956 | unsigned int len, stlen; |
957 | unsigned char *chbuf; | |
958 | char *head, *tail; | |
959 | ||
a0564e14 | 960 | pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count); |
1da177e4 | 961 | |
1da177e4 | 962 | portp = tty->driver_data; |
615e4a71 | 963 | if (portp == NULL) |
014c2544 | 964 | return 0; |
615e4a71 | 965 | if (portp->tx.buf == NULL) |
014c2544 | 966 | return 0; |
1da177e4 LT |
967 | |
968 | /* | |
969 | * If copying direct from user space we must cater for page faults, | |
970 | * causing us to "sleep" here for a while. To handle this copy in all | |
971 | * the data we need now, into a local buffer. Then when we got it all | |
972 | * copy it into the TX buffer. | |
973 | */ | |
974 | chbuf = (unsigned char *) buf; | |
975 | ||
976 | head = portp->tx.head; | |
977 | tail = portp->tx.tail; | |
978 | if (head >= tail) { | |
979 | len = STL_TXBUFSIZE - (head - tail) - 1; | |
980 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); | |
981 | } else { | |
982 | len = tail - head - 1; | |
983 | stlen = len; | |
984 | } | |
985 | ||
843b568c | 986 | len = min(len, (unsigned int)count); |
1da177e4 LT |
987 | count = 0; |
988 | while (len > 0) { | |
843b568c | 989 | stlen = min(len, stlen); |
1da177e4 LT |
990 | memcpy(head, chbuf, stlen); |
991 | len -= stlen; | |
992 | chbuf += stlen; | |
993 | count += stlen; | |
994 | head += stlen; | |
995 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { | |
996 | head = portp->tx.buf; | |
997 | stlen = tail - head; | |
998 | } | |
999 | } | |
1000 | portp->tx.head = head; | |
1001 | ||
1002 | clear_bit(ASYI_TXLOW, &portp->istate); | |
1003 | stl_startrxtx(portp, -1, 1); | |
1004 | ||
014c2544 | 1005 | return count; |
1da177e4 LT |
1006 | } |
1007 | ||
1008 | /*****************************************************************************/ | |
1009 | ||
1010 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) | |
1011 | { | |
ca7ed0f2 | 1012 | struct stlport *portp; |
1da177e4 LT |
1013 | unsigned int len; |
1014 | char *head, *tail; | |
1015 | ||
a0564e14 | 1016 | pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch); |
1da177e4 | 1017 | |
615e4a71 | 1018 | if (tty == NULL) |
1da177e4 LT |
1019 | return; |
1020 | portp = tty->driver_data; | |
615e4a71 | 1021 | if (portp == NULL) |
1da177e4 | 1022 | return; |
615e4a71 | 1023 | if (portp->tx.buf == NULL) |
1da177e4 LT |
1024 | return; |
1025 | ||
1026 | head = portp->tx.head; | |
1027 | tail = portp->tx.tail; | |
1028 | ||
1029 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); | |
1030 | len--; | |
1031 | ||
1032 | if (len > 0) { | |
1033 | *head++ = ch; | |
1034 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) | |
1035 | head = portp->tx.buf; | |
1036 | } | |
1037 | portp->tx.head = head; | |
1038 | } | |
1039 | ||
1040 | /*****************************************************************************/ | |
1041 | ||
1042 | /* | |
1043 | * If there are any characters in the buffer then make sure that TX | |
1044 | * interrupts are on and get'em out. Normally used after the putchar | |
1045 | * routine has been called. | |
1046 | */ | |
1047 | ||
1048 | static void stl_flushchars(struct tty_struct *tty) | |
1049 | { | |
ca7ed0f2 | 1050 | struct stlport *portp; |
1da177e4 | 1051 | |
a0564e14 | 1052 | pr_debug("stl_flushchars(tty=%p)\n", tty); |
1da177e4 | 1053 | |
615e4a71 | 1054 | if (tty == NULL) |
1da177e4 LT |
1055 | return; |
1056 | portp = tty->driver_data; | |
615e4a71 | 1057 | if (portp == NULL) |
1da177e4 | 1058 | return; |
615e4a71 | 1059 | if (portp->tx.buf == NULL) |
1da177e4 LT |
1060 | return; |
1061 | ||
1da177e4 LT |
1062 | stl_startrxtx(portp, -1, 1); |
1063 | } | |
1064 | ||
1065 | /*****************************************************************************/ | |
1066 | ||
1067 | static int stl_writeroom(struct tty_struct *tty) | |
1068 | { | |
ca7ed0f2 | 1069 | struct stlport *portp; |
1da177e4 LT |
1070 | char *head, *tail; |
1071 | ||
a0564e14 | 1072 | pr_debug("stl_writeroom(tty=%p)\n", tty); |
1da177e4 | 1073 | |
615e4a71 | 1074 | if (tty == NULL) |
014c2544 | 1075 | return 0; |
1da177e4 | 1076 | portp = tty->driver_data; |
615e4a71 | 1077 | if (portp == NULL) |
014c2544 | 1078 | return 0; |
615e4a71 | 1079 | if (portp->tx.buf == NULL) |
014c2544 | 1080 | return 0; |
1da177e4 LT |
1081 | |
1082 | head = portp->tx.head; | |
1083 | tail = portp->tx.tail; | |
c62429d9 | 1084 | return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1); |
1da177e4 LT |
1085 | } |
1086 | ||
1087 | /*****************************************************************************/ | |
1088 | ||
1089 | /* | |
1090 | * Return number of chars in the TX buffer. Normally we would just | |
1091 | * calculate the number of chars in the buffer and return that, but if | |
1092 | * the buffer is empty and TX interrupts are still on then we return | |
1093 | * that the buffer still has 1 char in it. This way whoever called us | |
1094 | * will not think that ALL chars have drained - since the UART still | |
1095 | * must have some chars in it (we are busy after all). | |
1096 | */ | |
1097 | ||
1098 | static int stl_charsinbuffer(struct tty_struct *tty) | |
1099 | { | |
ca7ed0f2 | 1100 | struct stlport *portp; |
1da177e4 LT |
1101 | unsigned int size; |
1102 | char *head, *tail; | |
1103 | ||
a0564e14 | 1104 | pr_debug("stl_charsinbuffer(tty=%p)\n", tty); |
1da177e4 | 1105 | |
615e4a71 | 1106 | if (tty == NULL) |
014c2544 | 1107 | return 0; |
1da177e4 | 1108 | portp = tty->driver_data; |
615e4a71 | 1109 | if (portp == NULL) |
014c2544 | 1110 | return 0; |
615e4a71 | 1111 | if (portp->tx.buf == NULL) |
014c2544 | 1112 | return 0; |
1da177e4 LT |
1113 | |
1114 | head = portp->tx.head; | |
1115 | tail = portp->tx.tail; | |
1116 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
1117 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) | |
1118 | size = 1; | |
014c2544 | 1119 | return size; |
1da177e4 LT |
1120 | } |
1121 | ||
1122 | /*****************************************************************************/ | |
1123 | ||
1124 | /* | |
1125 | * Generate the serial struct info. | |
1126 | */ | |
1127 | ||
ca7ed0f2 | 1128 | static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp) |
1da177e4 LT |
1129 | { |
1130 | struct serial_struct sio; | |
ca7ed0f2 | 1131 | struct stlbrd *brdp; |
1da177e4 | 1132 | |
a0564e14 | 1133 | pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp); |
1da177e4 LT |
1134 | |
1135 | memset(&sio, 0, sizeof(struct serial_struct)); | |
1136 | sio.line = portp->portnr; | |
1137 | sio.port = portp->ioaddr; | |
1138 | sio.flags = portp->flags; | |
1139 | sio.baud_base = portp->baud_base; | |
1140 | sio.close_delay = portp->close_delay; | |
1141 | sio.closing_wait = portp->closing_wait; | |
1142 | sio.custom_divisor = portp->custom_divisor; | |
1143 | sio.hub6 = 0; | |
1144 | if (portp->uartp == &stl_cd1400uart) { | |
1145 | sio.type = PORT_CIRRUS; | |
1146 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; | |
1147 | } else { | |
1148 | sio.type = PORT_UNKNOWN; | |
1149 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; | |
1150 | } | |
1151 | ||
1152 | brdp = stl_brds[portp->brdnr]; | |
615e4a71 | 1153 | if (brdp != NULL) |
1da177e4 LT |
1154 | sio.irq = brdp->irq; |
1155 | ||
1156 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; | |
1157 | } | |
1158 | ||
1159 | /*****************************************************************************/ | |
1160 | ||
1161 | /* | |
1162 | * Set port according to the serial struct info. | |
1163 | * At this point we do not do any auto-configure stuff, so we will | |
1164 | * just quietly ignore any requests to change irq, etc. | |
1165 | */ | |
1166 | ||
ca7ed0f2 | 1167 | static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp) |
1da177e4 LT |
1168 | { |
1169 | struct serial_struct sio; | |
1170 | ||
a0564e14 | 1171 | pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp); |
1da177e4 LT |
1172 | |
1173 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) | |
1174 | return -EFAULT; | |
1175 | if (!capable(CAP_SYS_ADMIN)) { | |
1176 | if ((sio.baud_base != portp->baud_base) || | |
1177 | (sio.close_delay != portp->close_delay) || | |
1178 | ((sio.flags & ~ASYNC_USR_MASK) != | |
1179 | (portp->flags & ~ASYNC_USR_MASK))) | |
014c2544 | 1180 | return -EPERM; |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | | |
1184 | (sio.flags & ASYNC_USR_MASK); | |
1185 | portp->baud_base = sio.baud_base; | |
1186 | portp->close_delay = sio.close_delay; | |
1187 | portp->closing_wait = sio.closing_wait; | |
1188 | portp->custom_divisor = sio.custom_divisor; | |
1189 | stl_setport(portp, portp->tty->termios); | |
014c2544 | 1190 | return 0; |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | /*****************************************************************************/ | |
1194 | ||
1195 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) | |
1196 | { | |
ca7ed0f2 | 1197 | struct stlport *portp; |
1da177e4 | 1198 | |
615e4a71 | 1199 | if (tty == NULL) |
014c2544 | 1200 | return -ENODEV; |
1da177e4 | 1201 | portp = tty->driver_data; |
615e4a71 | 1202 | if (portp == NULL) |
014c2544 | 1203 | return -ENODEV; |
1da177e4 | 1204 | if (tty->flags & (1 << TTY_IO_ERROR)) |
014c2544 | 1205 | return -EIO; |
1da177e4 LT |
1206 | |
1207 | return stl_getsignals(portp); | |
1208 | } | |
1209 | ||
1210 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, | |
1211 | unsigned int set, unsigned int clear) | |
1212 | { | |
ca7ed0f2 | 1213 | struct stlport *portp; |
1da177e4 LT |
1214 | int rts = -1, dtr = -1; |
1215 | ||
615e4a71 | 1216 | if (tty == NULL) |
014c2544 | 1217 | return -ENODEV; |
1da177e4 | 1218 | portp = tty->driver_data; |
615e4a71 | 1219 | if (portp == NULL) |
014c2544 | 1220 | return -ENODEV; |
1da177e4 | 1221 | if (tty->flags & (1 << TTY_IO_ERROR)) |
014c2544 | 1222 | return -EIO; |
1da177e4 LT |
1223 | |
1224 | if (set & TIOCM_RTS) | |
1225 | rts = 1; | |
1226 | if (set & TIOCM_DTR) | |
1227 | dtr = 1; | |
1228 | if (clear & TIOCM_RTS) | |
1229 | rts = 0; | |
1230 | if (clear & TIOCM_DTR) | |
1231 | dtr = 0; | |
1232 | ||
1233 | stl_setsignals(portp, dtr, rts); | |
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) | |
1238 | { | |
ca7ed0f2 | 1239 | struct stlport *portp; |
1da177e4 LT |
1240 | unsigned int ival; |
1241 | int rc; | |
1242 | void __user *argp = (void __user *)arg; | |
1243 | ||
a0564e14 JS |
1244 | pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd, |
1245 | arg); | |
1da177e4 | 1246 | |
615e4a71 | 1247 | if (tty == NULL) |
014c2544 | 1248 | return -ENODEV; |
1da177e4 | 1249 | portp = tty->driver_data; |
615e4a71 | 1250 | if (portp == NULL) |
014c2544 | 1251 | return -ENODEV; |
1da177e4 LT |
1252 | |
1253 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
c62429d9 | 1254 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) |
1da177e4 | 1255 | if (tty->flags & (1 << TTY_IO_ERROR)) |
014c2544 | 1256 | return -EIO; |
1da177e4 LT |
1257 | |
1258 | rc = 0; | |
1259 | ||
1260 | switch (cmd) { | |
1261 | case TIOCGSOFTCAR: | |
1262 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), | |
1263 | (unsigned __user *) argp); | |
1264 | break; | |
1265 | case TIOCSSOFTCAR: | |
1266 | if (get_user(ival, (unsigned int __user *) arg)) | |
1267 | return -EFAULT; | |
1268 | tty->termios->c_cflag = | |
1269 | (tty->termios->c_cflag & ~CLOCAL) | | |
1270 | (ival ? CLOCAL : 0); | |
1271 | break; | |
1272 | case TIOCGSERIAL: | |
1273 | rc = stl_getserial(portp, argp); | |
1274 | break; | |
1275 | case TIOCSSERIAL: | |
1276 | rc = stl_setserial(portp, argp); | |
1277 | break; | |
1278 | case COM_GETPORTSTATS: | |
1279 | rc = stl_getportstats(portp, argp); | |
1280 | break; | |
1281 | case COM_CLRPORTSTATS: | |
1282 | rc = stl_clrportstats(portp, argp); | |
1283 | break; | |
1284 | case TIOCSERCONFIG: | |
1285 | case TIOCSERGWILD: | |
1286 | case TIOCSERSWILD: | |
1287 | case TIOCSERGETLSR: | |
1288 | case TIOCSERGSTRUCT: | |
1289 | case TIOCSERGETMULTI: | |
1290 | case TIOCSERSETMULTI: | |
1291 | default: | |
1292 | rc = -ENOIOCTLCMD; | |
1293 | break; | |
1294 | } | |
1295 | ||
014c2544 | 1296 | return rc; |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | /*****************************************************************************/ | |
1300 | ||
96b066b8 JS |
1301 | /* |
1302 | * Start the transmitter again. Just turn TX interrupts back on. | |
1303 | */ | |
1304 | ||
1305 | static void stl_start(struct tty_struct *tty) | |
1306 | { | |
1307 | struct stlport *portp; | |
1308 | ||
1309 | pr_debug("stl_start(tty=%p)\n", tty); | |
1310 | ||
1311 | if (tty == NULL) | |
1312 | return; | |
1313 | portp = tty->driver_data; | |
1314 | if (portp == NULL) | |
1315 | return; | |
1316 | stl_startrxtx(portp, -1, 1); | |
1317 | } | |
1318 | ||
1319 | /*****************************************************************************/ | |
1320 | ||
606d099c | 1321 | static void stl_settermios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 1322 | { |
ca7ed0f2 | 1323 | struct stlport *portp; |
606d099c | 1324 | struct ktermios *tiosp; |
1da177e4 | 1325 | |
a0564e14 | 1326 | pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old); |
1da177e4 | 1327 | |
615e4a71 | 1328 | if (tty == NULL) |
1da177e4 LT |
1329 | return; |
1330 | portp = tty->driver_data; | |
615e4a71 | 1331 | if (portp == NULL) |
1da177e4 LT |
1332 | return; |
1333 | ||
1334 | tiosp = tty->termios; | |
1335 | if ((tiosp->c_cflag == old->c_cflag) && | |
1336 | (tiosp->c_iflag == old->c_iflag)) | |
1337 | return; | |
1338 | ||
1339 | stl_setport(portp, tiosp); | |
1340 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), | |
1341 | -1); | |
1342 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { | |
1343 | tty->hw_stopped = 0; | |
1344 | stl_start(tty); | |
1345 | } | |
1346 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) | |
1347 | wake_up_interruptible(&portp->open_wait); | |
1348 | } | |
1349 | ||
1350 | /*****************************************************************************/ | |
1351 | ||
1352 | /* | |
1353 | * Attempt to flow control who ever is sending us data. Based on termios | |
1354 | * settings use software or/and hardware flow control. | |
1355 | */ | |
1356 | ||
1357 | static void stl_throttle(struct tty_struct *tty) | |
1358 | { | |
ca7ed0f2 | 1359 | struct stlport *portp; |
1da177e4 | 1360 | |
a0564e14 | 1361 | pr_debug("stl_throttle(tty=%p)\n", tty); |
1da177e4 | 1362 | |
615e4a71 | 1363 | if (tty == NULL) |
1da177e4 LT |
1364 | return; |
1365 | portp = tty->driver_data; | |
615e4a71 | 1366 | if (portp == NULL) |
1da177e4 LT |
1367 | return; |
1368 | stl_flowctrl(portp, 0); | |
1369 | } | |
1370 | ||
1371 | /*****************************************************************************/ | |
1372 | ||
1373 | /* | |
1374 | * Unflow control the device sending us data... | |
1375 | */ | |
1376 | ||
1377 | static void stl_unthrottle(struct tty_struct *tty) | |
1378 | { | |
ca7ed0f2 | 1379 | struct stlport *portp; |
1da177e4 | 1380 | |
a0564e14 | 1381 | pr_debug("stl_unthrottle(tty=%p)\n", tty); |
1da177e4 | 1382 | |
615e4a71 | 1383 | if (tty == NULL) |
1da177e4 LT |
1384 | return; |
1385 | portp = tty->driver_data; | |
615e4a71 | 1386 | if (portp == NULL) |
1da177e4 LT |
1387 | return; |
1388 | stl_flowctrl(portp, 1); | |
1389 | } | |
1390 | ||
1391 | /*****************************************************************************/ | |
1392 | ||
1393 | /* | |
1394 | * Stop the transmitter. Basically to do this we will just turn TX | |
1395 | * interrupts off. | |
1396 | */ | |
1397 | ||
1398 | static void stl_stop(struct tty_struct *tty) | |
1399 | { | |
ca7ed0f2 | 1400 | struct stlport *portp; |
1da177e4 | 1401 | |
a0564e14 | 1402 | pr_debug("stl_stop(tty=%p)\n", tty); |
1da177e4 | 1403 | |
615e4a71 | 1404 | if (tty == NULL) |
1da177e4 LT |
1405 | return; |
1406 | portp = tty->driver_data; | |
615e4a71 | 1407 | if (portp == NULL) |
1da177e4 LT |
1408 | return; |
1409 | stl_startrxtx(portp, -1, 0); | |
1410 | } | |
1411 | ||
1412 | /*****************************************************************************/ | |
1413 | ||
1da177e4 LT |
1414 | /* |
1415 | * Hangup this port. This is pretty much like closing the port, only | |
1416 | * a little more brutal. No waiting for data to drain. Shutdown the | |
1417 | * port and maybe drop signals. | |
1418 | */ | |
1419 | ||
1420 | static void stl_hangup(struct tty_struct *tty) | |
1421 | { | |
ca7ed0f2 | 1422 | struct stlport *portp; |
1da177e4 | 1423 | |
a0564e14 | 1424 | pr_debug("stl_hangup(tty=%p)\n", tty); |
1da177e4 | 1425 | |
615e4a71 | 1426 | if (tty == NULL) |
1da177e4 LT |
1427 | return; |
1428 | portp = tty->driver_data; | |
615e4a71 | 1429 | if (portp == NULL) |
1da177e4 LT |
1430 | return; |
1431 | ||
1432 | portp->flags &= ~ASYNC_INITIALIZED; | |
1433 | stl_disableintrs(portp); | |
1434 | if (tty->termios->c_cflag & HUPCL) | |
1435 | stl_setsignals(portp, 0, 0); | |
1436 | stl_enablerxtx(portp, 0, 0); | |
1437 | stl_flushbuffer(tty); | |
1438 | portp->istate = 0; | |
1439 | set_bit(TTY_IO_ERROR, &tty->flags); | |
615e4a71 | 1440 | if (portp->tx.buf != NULL) { |
1da177e4 | 1441 | kfree(portp->tx.buf); |
615e4a71 JS |
1442 | portp->tx.buf = NULL; |
1443 | portp->tx.head = NULL; | |
1444 | portp->tx.tail = NULL; | |
1da177e4 | 1445 | } |
615e4a71 | 1446 | portp->tty = NULL; |
1da177e4 LT |
1447 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
1448 | portp->refcount = 0; | |
1449 | wake_up_interruptible(&portp->open_wait); | |
1450 | } | |
1451 | ||
1452 | /*****************************************************************************/ | |
1453 | ||
1da177e4 LT |
1454 | static void stl_breakctl(struct tty_struct *tty, int state) |
1455 | { | |
ca7ed0f2 | 1456 | struct stlport *portp; |
1da177e4 | 1457 | |
a0564e14 | 1458 | pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state); |
1da177e4 | 1459 | |
615e4a71 | 1460 | if (tty == NULL) |
1da177e4 LT |
1461 | return; |
1462 | portp = tty->driver_data; | |
615e4a71 | 1463 | if (portp == NULL) |
1da177e4 LT |
1464 | return; |
1465 | ||
1466 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); | |
1467 | } | |
1468 | ||
1469 | /*****************************************************************************/ | |
1470 | ||
1da177e4 LT |
1471 | static void stl_sendxchar(struct tty_struct *tty, char ch) |
1472 | { | |
ca7ed0f2 | 1473 | struct stlport *portp; |
1da177e4 | 1474 | |
a0564e14 | 1475 | pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch); |
1da177e4 | 1476 | |
615e4a71 | 1477 | if (tty == NULL) |
1da177e4 LT |
1478 | return; |
1479 | portp = tty->driver_data; | |
615e4a71 | 1480 | if (portp == NULL) |
1da177e4 LT |
1481 | return; |
1482 | ||
1483 | if (ch == STOP_CHAR(tty)) | |
1484 | stl_sendflow(portp, 0); | |
1485 | else if (ch == START_CHAR(tty)) | |
1486 | stl_sendflow(portp, 1); | |
1487 | else | |
1488 | stl_putchar(tty, ch); | |
1489 | } | |
1490 | ||
1491 | /*****************************************************************************/ | |
1492 | ||
1493 | #define MAXLINE 80 | |
1494 | ||
1495 | /* | |
1496 | * Format info for a specified port. The line is deliberately limited | |
1497 | * to 80 characters. (If it is too long it will be truncated, if too | |
1498 | * short then padded with spaces). | |
1499 | */ | |
1500 | ||
ca7ed0f2 | 1501 | static int stl_portinfo(struct stlport *portp, int portnr, char *pos) |
1da177e4 LT |
1502 | { |
1503 | char *sp; | |
1504 | int sigs, cnt; | |
1505 | ||
1506 | sp = pos; | |
1507 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", | |
1508 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", | |
1509 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); | |
1510 | ||
1511 | if (portp->stats.rxframing) | |
1512 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); | |
1513 | if (portp->stats.rxparity) | |
1514 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); | |
1515 | if (portp->stats.rxbreaks) | |
1516 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); | |
1517 | if (portp->stats.rxoverrun) | |
1518 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); | |
1519 | ||
1520 | sigs = stl_getsignals(portp); | |
1521 | cnt = sprintf(sp, "%s%s%s%s%s ", | |
1522 | (sigs & TIOCM_RTS) ? "|RTS" : "", | |
1523 | (sigs & TIOCM_CTS) ? "|CTS" : "", | |
1524 | (sigs & TIOCM_DTR) ? "|DTR" : "", | |
1525 | (sigs & TIOCM_CD) ? "|DCD" : "", | |
1526 | (sigs & TIOCM_DSR) ? "|DSR" : ""); | |
1527 | *sp = ' '; | |
1528 | sp += cnt; | |
1529 | ||
c62429d9 | 1530 | for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++) |
1da177e4 LT |
1531 | *sp++ = ' '; |
1532 | if (cnt >= MAXLINE) | |
1533 | pos[(MAXLINE - 2)] = '+'; | |
1534 | pos[(MAXLINE - 1)] = '\n'; | |
1535 | ||
014c2544 | 1536 | return MAXLINE; |
1da177e4 LT |
1537 | } |
1538 | ||
1539 | /*****************************************************************************/ | |
1540 | ||
1541 | /* | |
1542 | * Port info, read from the /proc file system. | |
1543 | */ | |
1544 | ||
1545 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) | |
1546 | { | |
ca7ed0f2 JS |
1547 | struct stlbrd *brdp; |
1548 | struct stlpanel *panelp; | |
1549 | struct stlport *portp; | |
6b2c9457 JS |
1550 | unsigned int brdnr, panelnr, portnr; |
1551 | int totalport, curoff, maxoff; | |
1da177e4 LT |
1552 | char *pos; |
1553 | ||
a0564e14 JS |
1554 | pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p," |
1555 | "data=%p\n", page, start, off, count, eof, data); | |
1da177e4 LT |
1556 | |
1557 | pos = page; | |
1558 | totalport = 0; | |
1559 | curoff = 0; | |
1560 | ||
1561 | if (off == 0) { | |
1562 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, | |
1563 | stl_drvversion); | |
1564 | while (pos < (page + MAXLINE - 1)) | |
1565 | *pos++ = ' '; | |
1566 | *pos++ = '\n'; | |
1567 | } | |
1568 | curoff = MAXLINE; | |
1569 | ||
1570 | /* | |
1571 | * We scan through for each board, panel and port. The offset is | |
1572 | * calculated on the fly, and irrelevant ports are skipped. | |
1573 | */ | |
c62429d9 | 1574 | for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) { |
1da177e4 | 1575 | brdp = stl_brds[brdnr]; |
615e4a71 | 1576 | if (brdp == NULL) |
1da177e4 LT |
1577 | continue; |
1578 | if (brdp->state == 0) | |
1579 | continue; | |
1580 | ||
1581 | maxoff = curoff + (brdp->nrports * MAXLINE); | |
1582 | if (off >= maxoff) { | |
1583 | curoff = maxoff; | |
1584 | continue; | |
1585 | } | |
1586 | ||
1587 | totalport = brdnr * STL_MAXPORTS; | |
c62429d9 | 1588 | for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) { |
1da177e4 | 1589 | panelp = brdp->panels[panelnr]; |
615e4a71 | 1590 | if (panelp == NULL) |
1da177e4 LT |
1591 | continue; |
1592 | ||
1593 | maxoff = curoff + (panelp->nrports * MAXLINE); | |
1594 | if (off >= maxoff) { | |
1595 | curoff = maxoff; | |
1596 | totalport += panelp->nrports; | |
1597 | continue; | |
1598 | } | |
1599 | ||
c62429d9 | 1600 | for (portnr = 0; portnr < panelp->nrports; portnr++, |
1da177e4 LT |
1601 | totalport++) { |
1602 | portp = panelp->ports[portnr]; | |
615e4a71 | 1603 | if (portp == NULL) |
1da177e4 LT |
1604 | continue; |
1605 | if (off >= (curoff += MAXLINE)) | |
1606 | continue; | |
1607 | if ((pos - page + MAXLINE) > count) | |
1608 | goto stl_readdone; | |
1609 | pos += stl_portinfo(portp, totalport, pos); | |
1610 | } | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | *eof = 1; | |
1615 | ||
1616 | stl_readdone: | |
1617 | *start = page; | |
c62429d9 | 1618 | return pos - page; |
1da177e4 LT |
1619 | } |
1620 | ||
1621 | /*****************************************************************************/ | |
1622 | ||
1623 | /* | |
1624 | * All board interrupts are vectored through here first. This code then | |
1625 | * calls off to the approrpriate board interrupt handlers. | |
1626 | */ | |
1627 | ||
7d12e780 | 1628 | static irqreturn_t stl_intr(int irq, void *dev_id) |
1da177e4 | 1629 | { |
ca7ed0f2 | 1630 | struct stlbrd *brdp = dev_id; |
1da177e4 | 1631 | |
a0564e14 | 1632 | pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq); |
1da177e4 LT |
1633 | |
1634 | return IRQ_RETVAL((* brdp->isr)(brdp)); | |
1635 | } | |
1636 | ||
1637 | /*****************************************************************************/ | |
1638 | ||
1639 | /* | |
1640 | * Interrupt service routine for EasyIO board types. | |
1641 | */ | |
1642 | ||
ca7ed0f2 | 1643 | static int stl_eiointr(struct stlbrd *brdp) |
1da177e4 | 1644 | { |
ca7ed0f2 | 1645 | struct stlpanel *panelp; |
1da177e4 LT |
1646 | unsigned int iobase; |
1647 | int handled = 0; | |
1648 | ||
b65b5b59 | 1649 | spin_lock(&brd_lock); |
1da177e4 LT |
1650 | panelp = brdp->panels[0]; |
1651 | iobase = panelp->iobase; | |
1652 | while (inb(brdp->iostatus) & EIO_INTRPEND) { | |
1653 | handled = 1; | |
1654 | (* panelp->isr)(panelp, iobase); | |
1655 | } | |
b65b5b59 | 1656 | spin_unlock(&brd_lock); |
1da177e4 LT |
1657 | return handled; |
1658 | } | |
1659 | ||
1660 | /*****************************************************************************/ | |
1661 | ||
1662 | /* | |
1663 | * Interrupt service routine for ECH-AT board types. | |
1664 | */ | |
1665 | ||
ca7ed0f2 | 1666 | static int stl_echatintr(struct stlbrd *brdp) |
1da177e4 | 1667 | { |
ca7ed0f2 | 1668 | struct stlpanel *panelp; |
6b2c9457 | 1669 | unsigned int ioaddr, bnknr; |
1da177e4 LT |
1670 | int handled = 0; |
1671 | ||
1672 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); | |
1673 | ||
1674 | while (inb(brdp->iostatus) & ECH_INTRPEND) { | |
1675 | handled = 1; | |
c62429d9 | 1676 | for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) { |
1da177e4 LT |
1677 | ioaddr = brdp->bnkstataddr[bnknr]; |
1678 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1679 | panelp = brdp->bnk2panel[bnknr]; | |
1680 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1681 | } | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); | |
1686 | ||
1687 | return handled; | |
1688 | } | |
1689 | ||
1690 | /*****************************************************************************/ | |
1691 | ||
1692 | /* | |
1693 | * Interrupt service routine for ECH-MCA board types. | |
1694 | */ | |
1695 | ||
ca7ed0f2 | 1696 | static int stl_echmcaintr(struct stlbrd *brdp) |
1da177e4 | 1697 | { |
ca7ed0f2 | 1698 | struct stlpanel *panelp; |
6b2c9457 | 1699 | unsigned int ioaddr, bnknr; |
1da177e4 LT |
1700 | int handled = 0; |
1701 | ||
1702 | while (inb(brdp->iostatus) & ECH_INTRPEND) { | |
1703 | handled = 1; | |
c62429d9 | 1704 | for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) { |
1da177e4 LT |
1705 | ioaddr = brdp->bnkstataddr[bnknr]; |
1706 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1707 | panelp = brdp->bnk2panel[bnknr]; | |
1708 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1709 | } | |
1710 | } | |
1711 | } | |
1712 | return handled; | |
1713 | } | |
1714 | ||
1715 | /*****************************************************************************/ | |
1716 | ||
1717 | /* | |
1718 | * Interrupt service routine for ECH-PCI board types. | |
1719 | */ | |
1720 | ||
ca7ed0f2 | 1721 | static int stl_echpciintr(struct stlbrd *brdp) |
1da177e4 | 1722 | { |
ca7ed0f2 | 1723 | struct stlpanel *panelp; |
6b2c9457 | 1724 | unsigned int ioaddr, bnknr, recheck; |
1da177e4 LT |
1725 | int handled = 0; |
1726 | ||
1727 | while (1) { | |
1728 | recheck = 0; | |
c62429d9 | 1729 | for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) { |
1da177e4 LT |
1730 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); |
1731 | ioaddr = brdp->bnkstataddr[bnknr]; | |
1732 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1733 | panelp = brdp->bnk2panel[bnknr]; | |
1734 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1735 | recheck++; | |
1736 | handled = 1; | |
1737 | } | |
1738 | } | |
1739 | if (! recheck) | |
1740 | break; | |
1741 | } | |
1742 | return handled; | |
1743 | } | |
1744 | ||
1745 | /*****************************************************************************/ | |
1746 | ||
1747 | /* | |
1748 | * Interrupt service routine for ECH-8/64-PCI board types. | |
1749 | */ | |
1750 | ||
ca7ed0f2 | 1751 | static int stl_echpci64intr(struct stlbrd *brdp) |
1da177e4 | 1752 | { |
ca7ed0f2 | 1753 | struct stlpanel *panelp; |
6b2c9457 | 1754 | unsigned int ioaddr, bnknr; |
1da177e4 LT |
1755 | int handled = 0; |
1756 | ||
1757 | while (inb(brdp->ioctrl) & 0x1) { | |
1758 | handled = 1; | |
c62429d9 | 1759 | for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) { |
1da177e4 LT |
1760 | ioaddr = brdp->bnkstataddr[bnknr]; |
1761 | if (inb(ioaddr) & ECH_PNLINTRPEND) { | |
1762 | panelp = brdp->bnk2panel[bnknr]; | |
1763 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); | |
1764 | } | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | return handled; | |
1769 | } | |
1770 | ||
1771 | /*****************************************************************************/ | |
1772 | ||
1773 | /* | |
1774 | * Service an off-level request for some channel. | |
1775 | */ | |
3e577a80 | 1776 | static void stl_offintr(struct work_struct *work) |
1da177e4 | 1777 | { |
ca7ed0f2 | 1778 | struct stlport *portp = container_of(work, struct stlport, tqueue); |
1da177e4 LT |
1779 | struct tty_struct *tty; |
1780 | unsigned int oldsigs; | |
1781 | ||
a0564e14 | 1782 | pr_debug("stl_offintr(portp=%p)\n", portp); |
1da177e4 | 1783 | |
615e4a71 | 1784 | if (portp == NULL) |
1da177e4 LT |
1785 | return; |
1786 | ||
1787 | tty = portp->tty; | |
615e4a71 | 1788 | if (tty == NULL) |
1da177e4 LT |
1789 | return; |
1790 | ||
c62429d9 | 1791 | if (test_bit(ASYI_TXLOW, &portp->istate)) |
1da177e4 | 1792 | tty_wakeup(tty); |
c62429d9 | 1793 | |
1da177e4 LT |
1794 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { |
1795 | clear_bit(ASYI_DCDCHANGE, &portp->istate); | |
1796 | oldsigs = portp->sigs; | |
1797 | portp->sigs = stl_getsignals(portp); | |
1798 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) | |
1799 | wake_up_interruptible(&portp->open_wait); | |
c62429d9 | 1800 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) |
1da177e4 LT |
1801 | if (portp->flags & ASYNC_CHECK_CD) |
1802 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ | |
1da177e4 | 1803 | } |
1da177e4 LT |
1804 | } |
1805 | ||
1806 | /*****************************************************************************/ | |
1807 | ||
1808 | /* | |
1809 | * Initialize all the ports on a panel. | |
1810 | */ | |
1811 | ||
705c1862 | 1812 | static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp) |
1da177e4 | 1813 | { |
6b2c9457 JS |
1814 | struct stlport *portp; |
1815 | unsigned int i; | |
1816 | int chipmask; | |
1da177e4 | 1817 | |
a0564e14 | 1818 | pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp); |
1da177e4 LT |
1819 | |
1820 | chipmask = stl_panelinit(brdp, panelp); | |
1821 | ||
1822 | /* | |
1823 | * All UART's are initialized (if found!). Now go through and setup | |
1824 | * each ports data structures. | |
1825 | */ | |
c62429d9 | 1826 | for (i = 0; i < panelp->nrports; i++) { |
ca7ed0f2 | 1827 | portp = kzalloc(sizeof(struct stlport), GFP_KERNEL); |
b0b4ed72 | 1828 | if (!portp) { |
1da177e4 | 1829 | printk("STALLION: failed to allocate memory " |
ca7ed0f2 | 1830 | "(size=%Zd)\n", sizeof(struct stlport)); |
1da177e4 LT |
1831 | break; |
1832 | } | |
1da177e4 LT |
1833 | |
1834 | portp->magic = STL_PORTMAGIC; | |
1835 | portp->portnr = i; | |
1836 | portp->brdnr = panelp->brdnr; | |
1837 | portp->panelnr = panelp->panelnr; | |
1838 | portp->uartp = panelp->uartp; | |
1839 | portp->clk = brdp->clk; | |
1840 | portp->baud_base = STL_BAUDBASE; | |
1841 | portp->close_delay = STL_CLOSEDELAY; | |
1842 | portp->closing_wait = 30 * HZ; | |
3e577a80 | 1843 | INIT_WORK(&portp->tqueue, stl_offintr); |
1da177e4 LT |
1844 | init_waitqueue_head(&portp->open_wait); |
1845 | init_waitqueue_head(&portp->close_wait); | |
1846 | portp->stats.brd = portp->brdnr; | |
1847 | portp->stats.panel = portp->panelnr; | |
1848 | portp->stats.port = portp->portnr; | |
1849 | panelp->ports[i] = portp; | |
1850 | stl_portinit(brdp, panelp, portp); | |
1851 | } | |
1852 | ||
c62429d9 | 1853 | return 0; |
1da177e4 LT |
1854 | } |
1855 | ||
3b85b341 JS |
1856 | static void stl_cleanup_panels(struct stlbrd *brdp) |
1857 | { | |
1858 | struct stlpanel *panelp; | |
1859 | struct stlport *portp; | |
1860 | unsigned int j, k; | |
1861 | ||
1862 | for (j = 0; j < STL_MAXPANELS; j++) { | |
1863 | panelp = brdp->panels[j]; | |
1864 | if (panelp == NULL) | |
1865 | continue; | |
1866 | for (k = 0; k < STL_PORTSPERPANEL; k++) { | |
1867 | portp = panelp->ports[k]; | |
1868 | if (portp == NULL) | |
1869 | continue; | |
1870 | if (portp->tty != NULL) | |
1871 | stl_hangup(portp->tty); | |
1872 | kfree(portp->tx.buf); | |
1873 | kfree(portp); | |
1874 | } | |
1875 | kfree(panelp); | |
1876 | } | |
1877 | } | |
1878 | ||
1da177e4 LT |
1879 | /*****************************************************************************/ |
1880 | ||
1881 | /* | |
1882 | * Try to find and initialize an EasyIO board. | |
1883 | */ | |
1884 | ||
705c1862 | 1885 | static int __devinit stl_initeio(struct stlbrd *brdp) |
1da177e4 | 1886 | { |
ca7ed0f2 | 1887 | struct stlpanel *panelp; |
1da177e4 LT |
1888 | unsigned int status; |
1889 | char *name; | |
3b85b341 | 1890 | int retval; |
1da177e4 | 1891 | |
a0564e14 | 1892 | pr_debug("stl_initeio(brdp=%p)\n", brdp); |
1da177e4 LT |
1893 | |
1894 | brdp->ioctrl = brdp->ioaddr1 + 1; | |
1895 | brdp->iostatus = brdp->ioaddr1 + 2; | |
1896 | ||
1897 | status = inb(brdp->iostatus); | |
1898 | if ((status & EIO_IDBITMASK) == EIO_MK3) | |
1899 | brdp->ioctrl++; | |
1900 | ||
1901 | /* | |
1902 | * Handle board specific stuff now. The real difference is PCI | |
1903 | * or not PCI. | |
1904 | */ | |
1905 | if (brdp->brdtype == BRD_EASYIOPCI) { | |
1906 | brdp->iosize1 = 0x80; | |
1907 | brdp->iosize2 = 0x80; | |
1908 | name = "serial(EIO-PCI)"; | |
1909 | outb(0x41, (brdp->ioaddr2 + 0x4c)); | |
1910 | } else { | |
1911 | brdp->iosize1 = 8; | |
1912 | name = "serial(EIO)"; | |
1913 | if ((brdp->irq < 0) || (brdp->irq > 15) || | |
1914 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
1915 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
1916 | brdp->irq, brdp->brdnr); | |
3b85b341 JS |
1917 | retval = -EINVAL; |
1918 | goto err; | |
1da177e4 LT |
1919 | } |
1920 | outb((stl_vecmap[brdp->irq] | EIO_0WS | | |
1921 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), | |
1922 | brdp->ioctrl); | |
1923 | } | |
1924 | ||
3b85b341 | 1925 | retval = -EBUSY; |
1da177e4 LT |
1926 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
1927 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " | |
1928 | "%x conflicts with another device\n", brdp->brdnr, | |
1929 | brdp->ioaddr1); | |
3b85b341 | 1930 | goto err; |
1da177e4 LT |
1931 | } |
1932 | ||
1933 | if (brdp->iosize2 > 0) | |
1934 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { | |
1935 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " | |
1936 | "address %x conflicts with another device\n", | |
1937 | brdp->brdnr, brdp->ioaddr2); | |
1938 | printk(KERN_WARNING "STALLION: Warning, also " | |
1939 | "releasing board %d I/O address %x \n", | |
1940 | brdp->brdnr, brdp->ioaddr1); | |
3b85b341 | 1941 | goto err_rel1; |
1da177e4 LT |
1942 | } |
1943 | ||
1944 | /* | |
1945 | * Everything looks OK, so let's go ahead and probe for the hardware. | |
1946 | */ | |
1947 | brdp->clk = CD1400_CLK; | |
1948 | brdp->isr = stl_eiointr; | |
1949 | ||
3b85b341 | 1950 | retval = -ENODEV; |
1da177e4 LT |
1951 | switch (status & EIO_IDBITMASK) { |
1952 | case EIO_8PORTM: | |
1953 | brdp->clk = CD1400_CLK8M; | |
1954 | /* fall thru */ | |
1955 | case EIO_8PORTRS: | |
1956 | case EIO_8PORTDI: | |
1957 | brdp->nrports = 8; | |
1958 | break; | |
1959 | case EIO_4PORTRS: | |
1960 | brdp->nrports = 4; | |
1961 | break; | |
1962 | case EIO_MK3: | |
1963 | switch (status & EIO_BRDMASK) { | |
1964 | case ID_BRD4: | |
1965 | brdp->nrports = 4; | |
1966 | break; | |
1967 | case ID_BRD8: | |
1968 | brdp->nrports = 8; | |
1969 | break; | |
1970 | case ID_BRD16: | |
1971 | brdp->nrports = 16; | |
1972 | break; | |
1973 | default: | |
3b85b341 | 1974 | goto err_rel2; |
1da177e4 LT |
1975 | } |
1976 | break; | |
1977 | default: | |
3b85b341 | 1978 | goto err_rel2; |
1da177e4 LT |
1979 | } |
1980 | ||
1981 | /* | |
1982 | * We have verified that the board is actually present, so now we | |
1983 | * can complete the setup. | |
1984 | */ | |
1985 | ||
ca7ed0f2 | 1986 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
b0b4ed72 | 1987 | if (!panelp) { |
1da177e4 | 1988 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
ca7ed0f2 | 1989 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
3b85b341 JS |
1990 | retval = -ENOMEM; |
1991 | goto err_rel2; | |
1da177e4 | 1992 | } |
1da177e4 LT |
1993 | |
1994 | panelp->magic = STL_PANELMAGIC; | |
1995 | panelp->brdnr = brdp->brdnr; | |
1996 | panelp->panelnr = 0; | |
1997 | panelp->nrports = brdp->nrports; | |
1998 | panelp->iobase = brdp->ioaddr1; | |
1999 | panelp->hwid = status; | |
2000 | if ((status & EIO_IDBITMASK) == EIO_MK3) { | |
615e4a71 | 2001 | panelp->uartp = &stl_sc26198uart; |
1da177e4 LT |
2002 | panelp->isr = stl_sc26198intr; |
2003 | } else { | |
615e4a71 | 2004 | panelp->uartp = &stl_cd1400uart; |
1da177e4 LT |
2005 | panelp->isr = stl_cd1400eiointr; |
2006 | } | |
2007 | ||
2008 | brdp->panels[0] = panelp; | |
2009 | brdp->nrpanels = 1; | |
2010 | brdp->state |= BRD_FOUND; | |
2011 | brdp->hwid = status; | |
0f2ed4c6 | 2012 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
1da177e4 LT |
2013 | printk("STALLION: failed to register interrupt " |
2014 | "routine for %s irq=%d\n", name, brdp->irq); | |
3b85b341 JS |
2015 | retval = -ENODEV; |
2016 | goto err_fr; | |
1da177e4 | 2017 | } |
3b85b341 JS |
2018 | |
2019 | return 0; | |
2020 | err_fr: | |
2021 | stl_cleanup_panels(brdp); | |
2022 | err_rel2: | |
2023 | if (brdp->iosize2 > 0) | |
2024 | release_region(brdp->ioaddr2, brdp->iosize2); | |
2025 | err_rel1: | |
2026 | release_region(brdp->ioaddr1, brdp->iosize1); | |
2027 | err: | |
2028 | return retval; | |
1da177e4 LT |
2029 | } |
2030 | ||
2031 | /*****************************************************************************/ | |
2032 | ||
2033 | /* | |
2034 | * Try to find an ECH board and initialize it. This code is capable of | |
2035 | * dealing with all types of ECH board. | |
2036 | */ | |
2037 | ||
705c1862 | 2038 | static int __devinit stl_initech(struct stlbrd *brdp) |
1da177e4 | 2039 | { |
ca7ed0f2 | 2040 | struct stlpanel *panelp; |
6b2c9457 JS |
2041 | unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i; |
2042 | int retval; | |
1da177e4 LT |
2043 | char *name; |
2044 | ||
a0564e14 | 2045 | pr_debug("stl_initech(brdp=%p)\n", brdp); |
1da177e4 LT |
2046 | |
2047 | status = 0; | |
2048 | conflict = 0; | |
2049 | ||
2050 | /* | |
2051 | * Set up the initial board register contents for boards. This varies a | |
2052 | * bit between the different board types. So we need to handle each | |
2053 | * separately. Also do a check that the supplied IRQ is good. | |
2054 | */ | |
2055 | switch (brdp->brdtype) { | |
2056 | ||
2057 | case BRD_ECH: | |
2058 | brdp->isr = stl_echatintr; | |
2059 | brdp->ioctrl = brdp->ioaddr1 + 1; | |
2060 | brdp->iostatus = brdp->ioaddr1 + 1; | |
2061 | status = inb(brdp->iostatus); | |
3b85b341 JS |
2062 | if ((status & ECH_IDBITMASK) != ECH_ID) { |
2063 | retval = -ENODEV; | |
2064 | goto err; | |
2065 | } | |
1da177e4 LT |
2066 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
2067 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2068 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2069 | brdp->irq, brdp->brdnr); | |
3b85b341 JS |
2070 | retval = -EINVAL; |
2071 | goto err; | |
1da177e4 LT |
2072 | } |
2073 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); | |
2074 | status |= (stl_vecmap[brdp->irq] << 1); | |
2075 | outb((status | ECH_BRDRESET), brdp->ioaddr1); | |
2076 | brdp->ioctrlval = ECH_INTENABLE | | |
2077 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); | |
c62429d9 | 2078 | for (i = 0; i < 10; i++) |
1da177e4 LT |
2079 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
2080 | brdp->iosize1 = 2; | |
2081 | brdp->iosize2 = 32; | |
2082 | name = "serial(EC8/32)"; | |
2083 | outb(status, brdp->ioaddr1); | |
2084 | break; | |
2085 | ||
2086 | case BRD_ECHMC: | |
2087 | brdp->isr = stl_echmcaintr; | |
2088 | brdp->ioctrl = brdp->ioaddr1 + 0x20; | |
2089 | brdp->iostatus = brdp->ioctrl; | |
2090 | status = inb(brdp->iostatus); | |
3b85b341 JS |
2091 | if ((status & ECH_IDBITMASK) != ECH_ID) { |
2092 | retval = -ENODEV; | |
2093 | goto err; | |
2094 | } | |
1da177e4 LT |
2095 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
2096 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { | |
2097 | printk("STALLION: invalid irq=%d for brd=%d\n", | |
2098 | brdp->irq, brdp->brdnr); | |
3b85b341 JS |
2099 | retval = -EINVAL; |
2100 | goto err; | |
1da177e4 LT |
2101 | } |
2102 | outb(ECHMC_BRDRESET, brdp->ioctrl); | |
2103 | outb(ECHMC_INTENABLE, brdp->ioctrl); | |
2104 | brdp->iosize1 = 64; | |
2105 | name = "serial(EC8/32-MC)"; | |
2106 | break; | |
2107 | ||
2108 | case BRD_ECHPCI: | |
2109 | brdp->isr = stl_echpciintr; | |
2110 | brdp->ioctrl = brdp->ioaddr1 + 2; | |
2111 | brdp->iosize1 = 4; | |
2112 | brdp->iosize2 = 8; | |
2113 | name = "serial(EC8/32-PCI)"; | |
2114 | break; | |
2115 | ||
2116 | case BRD_ECH64PCI: | |
2117 | brdp->isr = stl_echpci64intr; | |
2118 | brdp->ioctrl = brdp->ioaddr2 + 0x40; | |
2119 | outb(0x43, (brdp->ioaddr1 + 0x4c)); | |
2120 | brdp->iosize1 = 0x80; | |
2121 | brdp->iosize2 = 0x80; | |
2122 | name = "serial(EC8/64-PCI)"; | |
2123 | break; | |
2124 | ||
2125 | default: | |
2126 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); | |
3b85b341 JS |
2127 | retval = -EINVAL; |
2128 | goto err; | |
1da177e4 LT |
2129 | } |
2130 | ||
2131 | /* | |
2132 | * Check boards for possible IO address conflicts and return fail status | |
2133 | * if an IO conflict found. | |
2134 | */ | |
3b85b341 | 2135 | retval = -EBUSY; |
1da177e4 LT |
2136 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
2137 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " | |
2138 | "%x conflicts with another device\n", brdp->brdnr, | |
2139 | brdp->ioaddr1); | |
3b85b341 | 2140 | goto err; |
1da177e4 LT |
2141 | } |
2142 | ||
2143 | if (brdp->iosize2 > 0) | |
2144 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { | |
2145 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " | |
2146 | "address %x conflicts with another device\n", | |
2147 | brdp->brdnr, brdp->ioaddr2); | |
2148 | printk(KERN_WARNING "STALLION: Warning, also " | |
2149 | "releasing board %d I/O address %x \n", | |
2150 | brdp->brdnr, brdp->ioaddr1); | |
3b85b341 | 2151 | goto err_rel1; |
1da177e4 LT |
2152 | } |
2153 | ||
2154 | /* | |
2155 | * Scan through the secondary io address space looking for panels. | |
2156 | * As we find'em allocate and initialize panel structures for each. | |
2157 | */ | |
2158 | brdp->clk = CD1400_CLK; | |
2159 | brdp->hwid = status; | |
2160 | ||
2161 | ioaddr = brdp->ioaddr2; | |
2162 | banknr = 0; | |
2163 | panelnr = 0; | |
2164 | nxtid = 0; | |
2165 | ||
c62429d9 | 2166 | for (i = 0; i < STL_MAXPANELS; i++) { |
1da177e4 LT |
2167 | if (brdp->brdtype == BRD_ECHPCI) { |
2168 | outb(nxtid, brdp->ioctrl); | |
2169 | ioaddr = brdp->ioaddr2; | |
2170 | } | |
2171 | status = inb(ioaddr + ECH_PNLSTATUS); | |
2172 | if ((status & ECH_PNLIDMASK) != nxtid) | |
64834b22 | 2173 | break; |
ca7ed0f2 | 2174 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
b0b4ed72 | 2175 | if (!panelp) { |
1da177e4 | 2176 | printk("STALLION: failed to allocate memory " |
ca7ed0f2 | 2177 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
49277b1c | 2178 | retval = -ENOMEM; |
3b85b341 | 2179 | goto err_fr; |
1da177e4 | 2180 | } |
1da177e4 LT |
2181 | panelp->magic = STL_PANELMAGIC; |
2182 | panelp->brdnr = brdp->brdnr; | |
2183 | panelp->panelnr = panelnr; | |
2184 | panelp->iobase = ioaddr; | |
2185 | panelp->pagenr = nxtid; | |
2186 | panelp->hwid = status; | |
2187 | brdp->bnk2panel[banknr] = panelp; | |
2188 | brdp->bnkpageaddr[banknr] = nxtid; | |
2189 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; | |
2190 | ||
2191 | if (status & ECH_PNLXPID) { | |
615e4a71 | 2192 | panelp->uartp = &stl_sc26198uart; |
1da177e4 LT |
2193 | panelp->isr = stl_sc26198intr; |
2194 | if (status & ECH_PNL16PORT) { | |
2195 | panelp->nrports = 16; | |
2196 | brdp->bnk2panel[banknr] = panelp; | |
2197 | brdp->bnkpageaddr[banknr] = nxtid; | |
2198 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + | |
2199 | ECH_PNLSTATUS; | |
c62429d9 | 2200 | } else |
1da177e4 | 2201 | panelp->nrports = 8; |
1da177e4 | 2202 | } else { |
615e4a71 | 2203 | panelp->uartp = &stl_cd1400uart; |
1da177e4 LT |
2204 | panelp->isr = stl_cd1400echintr; |
2205 | if (status & ECH_PNL16PORT) { | |
2206 | panelp->nrports = 16; | |
2207 | panelp->ackmask = 0x80; | |
2208 | if (brdp->brdtype != BRD_ECHPCI) | |
2209 | ioaddr += EREG_BANKSIZE; | |
2210 | brdp->bnk2panel[banknr] = panelp; | |
2211 | brdp->bnkpageaddr[banknr] = ++nxtid; | |
2212 | brdp->bnkstataddr[banknr++] = ioaddr + | |
2213 | ECH_PNLSTATUS; | |
2214 | } else { | |
2215 | panelp->nrports = 8; | |
2216 | panelp->ackmask = 0xc0; | |
2217 | } | |
2218 | } | |
2219 | ||
2220 | nxtid++; | |
2221 | ioaddr += EREG_BANKSIZE; | |
2222 | brdp->nrports += panelp->nrports; | |
2223 | brdp->panels[panelnr++] = panelp; | |
2224 | if ((brdp->brdtype != BRD_ECHPCI) && | |
49277b1c JS |
2225 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) { |
2226 | retval = -EINVAL; | |
3b85b341 | 2227 | goto err_fr; |
49277b1c | 2228 | } |
1da177e4 LT |
2229 | } |
2230 | ||
2231 | brdp->nrpanels = panelnr; | |
2232 | brdp->nrbnks = banknr; | |
2233 | if (brdp->brdtype == BRD_ECH) | |
2234 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); | |
2235 | ||
2236 | brdp->state |= BRD_FOUND; | |
0f2ed4c6 | 2237 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
1da177e4 LT |
2238 | printk("STALLION: failed to register interrupt " |
2239 | "routine for %s irq=%d\n", name, brdp->irq); | |
3b85b341 JS |
2240 | retval = -ENODEV; |
2241 | goto err_fr; | |
1da177e4 LT |
2242 | } |
2243 | ||
3b85b341 JS |
2244 | return 0; |
2245 | err_fr: | |
2246 | stl_cleanup_panels(brdp); | |
2247 | if (brdp->iosize2 > 0) | |
2248 | release_region(brdp->ioaddr2, brdp->iosize2); | |
2249 | err_rel1: | |
2250 | release_region(brdp->ioaddr1, brdp->iosize1); | |
2251 | err: | |
2252 | return retval; | |
1da177e4 LT |
2253 | } |
2254 | ||
2255 | /*****************************************************************************/ | |
2256 | ||
2257 | /* | |
2258 | * Initialize and configure the specified board. | |
2259 | * Scan through all the boards in the configuration and see what we | |
2260 | * can find. Handle EIO and the ECH boards a little differently here | |
2261 | * since the initial search and setup is very different. | |
2262 | */ | |
2263 | ||
705c1862 | 2264 | static int __devinit stl_brdinit(struct stlbrd *brdp) |
1da177e4 | 2265 | { |
3b85b341 | 2266 | int i, retval; |
1da177e4 | 2267 | |
a0564e14 | 2268 | pr_debug("stl_brdinit(brdp=%p)\n", brdp); |
1da177e4 LT |
2269 | |
2270 | switch (brdp->brdtype) { | |
2271 | case BRD_EASYIO: | |
2272 | case BRD_EASYIOPCI: | |
3b85b341 JS |
2273 | retval = stl_initeio(brdp); |
2274 | if (retval) | |
2275 | goto err; | |
1da177e4 LT |
2276 | break; |
2277 | case BRD_ECH: | |
2278 | case BRD_ECHMC: | |
2279 | case BRD_ECHPCI: | |
2280 | case BRD_ECH64PCI: | |
3b85b341 JS |
2281 | retval = stl_initech(brdp); |
2282 | if (retval) | |
2283 | goto err; | |
1da177e4 LT |
2284 | break; |
2285 | default: | |
2286 | printk("STALLION: board=%d is unknown board type=%d\n", | |
2287 | brdp->brdnr, brdp->brdtype); | |
3b85b341 JS |
2288 | retval = -ENODEV; |
2289 | goto err; | |
1da177e4 LT |
2290 | } |
2291 | ||
1da177e4 LT |
2292 | if ((brdp->state & BRD_FOUND) == 0) { |
2293 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", | |
2294 | stl_brdnames[brdp->brdtype], brdp->brdnr, | |
2295 | brdp->ioaddr1, brdp->irq); | |
3b85b341 | 2296 | goto err_free; |
1da177e4 LT |
2297 | } |
2298 | ||
c62429d9 | 2299 | for (i = 0; i < STL_MAXPANELS; i++) |
615e4a71 | 2300 | if (brdp->panels[i] != NULL) |
1da177e4 LT |
2301 | stl_initports(brdp, brdp->panels[i]); |
2302 | ||
2303 | printk("STALLION: %s found, board=%d io=%x irq=%d " | |
2304 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], | |
2305 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, | |
2306 | brdp->nrports); | |
3b85b341 JS |
2307 | |
2308 | return 0; | |
2309 | err_free: | |
2310 | free_irq(brdp->irq, brdp); | |
2311 | ||
2312 | stl_cleanup_panels(brdp); | |
2313 | ||
2314 | release_region(brdp->ioaddr1, brdp->iosize1); | |
2315 | if (brdp->iosize2 > 0) | |
2316 | release_region(brdp->ioaddr2, brdp->iosize2); | |
3b85b341 JS |
2317 | err: |
2318 | return retval; | |
1da177e4 LT |
2319 | } |
2320 | ||
2321 | /*****************************************************************************/ | |
2322 | ||
2323 | /* | |
2324 | * Find the next available board number that is free. | |
2325 | */ | |
2326 | ||
705c1862 | 2327 | static int __devinit stl_getbrdnr(void) |
1da177e4 | 2328 | { |
6b2c9457 | 2329 | unsigned int i; |
1da177e4 | 2330 | |
c62429d9 | 2331 | for (i = 0; i < STL_MAXBRDS; i++) |
615e4a71 | 2332 | if (stl_brds[i] == NULL) { |
1da177e4 LT |
2333 | if (i >= stl_nrbrds) |
2334 | stl_nrbrds = i + 1; | |
c62429d9 | 2335 | return i; |
1da177e4 | 2336 | } |
c62429d9 JS |
2337 | |
2338 | return -1; | |
1da177e4 LT |
2339 | } |
2340 | ||
b1b84fe0 | 2341 | /*****************************************************************************/ |
1da177e4 LT |
2342 | /* |
2343 | * We have a Stallion board. Allocate a board structure and | |
2344 | * initialize it. Read its IO and IRQ resources from PCI | |
2345 | * configuration space. | |
2346 | */ | |
2347 | ||
b1b84fe0 JS |
2348 | static int __devinit stl_pciprobe(struct pci_dev *pdev, |
2349 | const struct pci_device_id *ent) | |
1da177e4 | 2350 | { |
b1b84fe0 | 2351 | struct stlbrd *brdp; |
aeaccfe4 | 2352 | unsigned int i, brdtype = ent->driver_data; |
6b2c9457 | 2353 | int brdnr, retval = -ENODEV; |
1da177e4 | 2354 | |
b1b84fe0 | 2355 | if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
3b85b341 | 2356 | goto err; |
b1b84fe0 | 2357 | |
3b85b341 JS |
2358 | retval = pci_enable_device(pdev); |
2359 | if (retval) | |
2360 | goto err; | |
2361 | brdp = stl_allocbrd(); | |
2362 | if (brdp == NULL) { | |
2363 | retval = -ENOMEM; | |
2364 | goto err; | |
2365 | } | |
79cfe7ab | 2366 | mutex_lock(&stl_brdslock); |
6b2c9457 JS |
2367 | brdnr = stl_getbrdnr(); |
2368 | if (brdnr < 0) { | |
fefaf9a7 | 2369 | dev_err(&pdev->dev, "too many boards found, " |
1da177e4 | 2370 | "maximum supported %d\n", STL_MAXBRDS); |
79cfe7ab | 2371 | mutex_unlock(&stl_brdslock); |
49277b1c | 2372 | retval = -ENODEV; |
3b85b341 | 2373 | goto err_fr; |
1da177e4 | 2374 | } |
6b2c9457 | 2375 | brdp->brdnr = (unsigned int)brdnr; |
79cfe7ab JS |
2376 | stl_brds[brdp->brdnr] = brdp; |
2377 | mutex_unlock(&stl_brdslock); | |
2378 | ||
1da177e4 | 2379 | brdp->brdtype = brdtype; |
fc06b5cf | 2380 | brdp->state |= STL_PROBED; |
1da177e4 | 2381 | |
1da177e4 LT |
2382 | /* |
2383 | * We have all resources from the board, so let's setup the actual | |
2384 | * board structure now. | |
2385 | */ | |
2386 | switch (brdtype) { | |
2387 | case BRD_ECHPCI: | |
b1b84fe0 JS |
2388 | brdp->ioaddr2 = pci_resource_start(pdev, 0); |
2389 | brdp->ioaddr1 = pci_resource_start(pdev, 1); | |
1da177e4 LT |
2390 | break; |
2391 | case BRD_ECH64PCI: | |
b1b84fe0 JS |
2392 | brdp->ioaddr2 = pci_resource_start(pdev, 2); |
2393 | brdp->ioaddr1 = pci_resource_start(pdev, 1); | |
1da177e4 LT |
2394 | break; |
2395 | case BRD_EASYIOPCI: | |
b1b84fe0 JS |
2396 | brdp->ioaddr1 = pci_resource_start(pdev, 2); |
2397 | brdp->ioaddr2 = pci_resource_start(pdev, 1); | |
1da177e4 LT |
2398 | break; |
2399 | default: | |
fefaf9a7 | 2400 | dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype); |
1da177e4 LT |
2401 | break; |
2402 | } | |
2403 | ||
b1b84fe0 | 2404 | brdp->irq = pdev->irq; |
3b85b341 JS |
2405 | retval = stl_brdinit(brdp); |
2406 | if (retval) | |
79cfe7ab | 2407 | goto err_null; |
1da177e4 | 2408 | |
b1b84fe0 JS |
2409 | pci_set_drvdata(pdev, brdp); |
2410 | ||
aeaccfe4 JS |
2411 | for (i = 0; i < brdp->nrports; i++) |
2412 | tty_register_device(stl_serial, | |
2413 | brdp->brdnr * STL_MAXPORTS + i, &pdev->dev); | |
2414 | ||
3b85b341 | 2415 | return 0; |
79cfe7ab JS |
2416 | err_null: |
2417 | stl_brds[brdp->brdnr] = NULL; | |
3b85b341 JS |
2418 | err_fr: |
2419 | kfree(brdp); | |
2420 | err: | |
2421 | return retval; | |
1da177e4 LT |
2422 | } |
2423 | ||
b1b84fe0 | 2424 | static void __devexit stl_pciremove(struct pci_dev *pdev) |
1da177e4 | 2425 | { |
b1b84fe0 | 2426 | struct stlbrd *brdp = pci_get_drvdata(pdev); |
aeaccfe4 | 2427 | unsigned int i; |
1da177e4 | 2428 | |
b1b84fe0 | 2429 | free_irq(brdp->irq, brdp); |
1da177e4 | 2430 | |
b1b84fe0 | 2431 | stl_cleanup_panels(brdp); |
1da177e4 | 2432 | |
b1b84fe0 JS |
2433 | release_region(brdp->ioaddr1, brdp->iosize1); |
2434 | if (brdp->iosize2 > 0) | |
2435 | release_region(brdp->ioaddr2, brdp->iosize2); | |
1da177e4 | 2436 | |
aeaccfe4 JS |
2437 | for (i = 0; i < brdp->nrports; i++) |
2438 | tty_unregister_device(stl_serial, | |
2439 | brdp->brdnr * STL_MAXPORTS + i); | |
2440 | ||
b1b84fe0 JS |
2441 | stl_brds[brdp->brdnr] = NULL; |
2442 | kfree(brdp); | |
1da177e4 LT |
2443 | } |
2444 | ||
b1b84fe0 JS |
2445 | static struct pci_driver stl_pcidriver = { |
2446 | .name = "stallion", | |
2447 | .id_table = stl_pcibrds, | |
2448 | .probe = stl_pciprobe, | |
2449 | .remove = __devexit_p(stl_pciremove) | |
2450 | }; | |
1da177e4 LT |
2451 | |
2452 | /*****************************************************************************/ | |
2453 | ||
1da177e4 LT |
2454 | /* |
2455 | * Return the board stats structure to user app. | |
2456 | */ | |
2457 | ||
2458 | static int stl_getbrdstats(combrd_t __user *bp) | |
2459 | { | |
6b2c9457 | 2460 | combrd_t stl_brdstats; |
ca7ed0f2 JS |
2461 | struct stlbrd *brdp; |
2462 | struct stlpanel *panelp; | |
6b2c9457 | 2463 | unsigned int i; |
1da177e4 LT |
2464 | |
2465 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) | |
2466 | return -EFAULT; | |
2467 | if (stl_brdstats.brd >= STL_MAXBRDS) | |
c62429d9 | 2468 | return -ENODEV; |
1da177e4 | 2469 | brdp = stl_brds[stl_brdstats.brd]; |
615e4a71 | 2470 | if (brdp == NULL) |
c62429d9 | 2471 | return -ENODEV; |
1da177e4 LT |
2472 | |
2473 | memset(&stl_brdstats, 0, sizeof(combrd_t)); | |
2474 | stl_brdstats.brd = brdp->brdnr; | |
2475 | stl_brdstats.type = brdp->brdtype; | |
2476 | stl_brdstats.hwid = brdp->hwid; | |
2477 | stl_brdstats.state = brdp->state; | |
2478 | stl_brdstats.ioaddr = brdp->ioaddr1; | |
2479 | stl_brdstats.ioaddr2 = brdp->ioaddr2; | |
2480 | stl_brdstats.irq = brdp->irq; | |
2481 | stl_brdstats.nrpanels = brdp->nrpanels; | |
2482 | stl_brdstats.nrports = brdp->nrports; | |
c62429d9 | 2483 | for (i = 0; i < brdp->nrpanels; i++) { |
1da177e4 LT |
2484 | panelp = brdp->panels[i]; |
2485 | stl_brdstats.panels[i].panel = i; | |
2486 | stl_brdstats.panels[i].hwid = panelp->hwid; | |
2487 | stl_brdstats.panels[i].nrports = panelp->nrports; | |
2488 | } | |
2489 | ||
2490 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; | |
2491 | } | |
2492 | ||
2493 | /*****************************************************************************/ | |
2494 | ||
2495 | /* | |
2496 | * Resolve the referenced port number into a port struct pointer. | |
2497 | */ | |
2498 | ||
ca7ed0f2 | 2499 | static struct stlport *stl_getport(int brdnr, int panelnr, int portnr) |
1da177e4 | 2500 | { |
ca7ed0f2 JS |
2501 | struct stlbrd *brdp; |
2502 | struct stlpanel *panelp; | |
1da177e4 | 2503 | |
c62429d9 JS |
2504 | if (brdnr < 0 || brdnr >= STL_MAXBRDS) |
2505 | return NULL; | |
1da177e4 | 2506 | brdp = stl_brds[brdnr]; |
615e4a71 | 2507 | if (brdp == NULL) |
c62429d9 | 2508 | return NULL; |
6b2c9457 | 2509 | if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels) |
c62429d9 | 2510 | return NULL; |
1da177e4 | 2511 | panelp = brdp->panels[panelnr]; |
615e4a71 | 2512 | if (panelp == NULL) |
c62429d9 | 2513 | return NULL; |
6b2c9457 | 2514 | if (portnr < 0 || (unsigned int)portnr >= panelp->nrports) |
c62429d9 JS |
2515 | return NULL; |
2516 | return panelp->ports[portnr]; | |
1da177e4 LT |
2517 | } |
2518 | ||
2519 | /*****************************************************************************/ | |
2520 | ||
2521 | /* | |
2522 | * Return the port stats structure to user app. A NULL port struct | |
2523 | * pointer passed in means that we need to find out from the app | |
2524 | * what port to get stats for (used through board control device). | |
2525 | */ | |
2526 | ||
ca7ed0f2 | 2527 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp) |
1da177e4 | 2528 | { |
6b2c9457 | 2529 | comstats_t stl_comstats; |
1da177e4 LT |
2530 | unsigned char *head, *tail; |
2531 | unsigned long flags; | |
2532 | ||
2533 | if (!portp) { | |
2534 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) | |
2535 | return -EFAULT; | |
2536 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, | |
2537 | stl_comstats.port); | |
615e4a71 | 2538 | if (portp == NULL) |
c62429d9 | 2539 | return -ENODEV; |
1da177e4 LT |
2540 | } |
2541 | ||
2542 | portp->stats.state = portp->istate; | |
2543 | portp->stats.flags = portp->flags; | |
2544 | portp->stats.hwid = portp->hwid; | |
2545 | ||
2546 | portp->stats.ttystate = 0; | |
2547 | portp->stats.cflags = 0; | |
2548 | portp->stats.iflags = 0; | |
2549 | portp->stats.oflags = 0; | |
2550 | portp->stats.lflags = 0; | |
2551 | portp->stats.rxbuffered = 0; | |
2552 | ||
b65b5b59 | 2553 | spin_lock_irqsave(&stallion_lock, flags); |
c62429d9 | 2554 | if (portp->tty != NULL) |
1da177e4 LT |
2555 | if (portp->tty->driver_data == portp) { |
2556 | portp->stats.ttystate = portp->tty->flags; | |
33f0f88f AC |
2557 | /* No longer available as a statistic */ |
2558 | portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ | |
615e4a71 | 2559 | if (portp->tty->termios != NULL) { |
1da177e4 LT |
2560 | portp->stats.cflags = portp->tty->termios->c_cflag; |
2561 | portp->stats.iflags = portp->tty->termios->c_iflag; | |
2562 | portp->stats.oflags = portp->tty->termios->c_oflag; | |
2563 | portp->stats.lflags = portp->tty->termios->c_lflag; | |
2564 | } | |
2565 | } | |
b65b5b59 | 2566 | spin_unlock_irqrestore(&stallion_lock, flags); |
1da177e4 LT |
2567 | |
2568 | head = portp->tx.head; | |
2569 | tail = portp->tx.tail; | |
c62429d9 JS |
2570 | portp->stats.txbuffered = (head >= tail) ? (head - tail) : |
2571 | (STL_TXBUFSIZE - (tail - head)); | |
1da177e4 LT |
2572 | |
2573 | portp->stats.signals = (unsigned long) stl_getsignals(portp); | |
2574 | ||
2575 | return copy_to_user(cp, &portp->stats, | |
2576 | sizeof(comstats_t)) ? -EFAULT : 0; | |
2577 | } | |
2578 | ||
2579 | /*****************************************************************************/ | |
2580 | ||
2581 | /* | |
2582 | * Clear the port stats structure. We also return it zeroed out... | |
2583 | */ | |
2584 | ||
ca7ed0f2 | 2585 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp) |
1da177e4 | 2586 | { |
6b2c9457 JS |
2587 | comstats_t stl_comstats; |
2588 | ||
1da177e4 LT |
2589 | if (!portp) { |
2590 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) | |
2591 | return -EFAULT; | |
2592 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, | |
2593 | stl_comstats.port); | |
615e4a71 | 2594 | if (portp == NULL) |
c62429d9 | 2595 | return -ENODEV; |
1da177e4 LT |
2596 | } |
2597 | ||
2598 | memset(&portp->stats, 0, sizeof(comstats_t)); | |
2599 | portp->stats.brd = portp->brdnr; | |
2600 | portp->stats.panel = portp->panelnr; | |
2601 | portp->stats.port = portp->portnr; | |
2602 | return copy_to_user(cp, &portp->stats, | |
2603 | sizeof(comstats_t)) ? -EFAULT : 0; | |
2604 | } | |
2605 | ||
2606 | /*****************************************************************************/ | |
2607 | ||
2608 | /* | |
2609 | * Return the entire driver ports structure to a user app. | |
2610 | */ | |
2611 | ||
ca7ed0f2 | 2612 | static int stl_getportstruct(struct stlport __user *arg) |
1da177e4 | 2613 | { |
6b2c9457 | 2614 | struct stlport stl_dummyport; |
ca7ed0f2 | 2615 | struct stlport *portp; |
1da177e4 | 2616 | |
ca7ed0f2 | 2617 | if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport))) |
1da177e4 LT |
2618 | return -EFAULT; |
2619 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, | |
2620 | stl_dummyport.portnr); | |
2621 | if (!portp) | |
2622 | return -ENODEV; | |
ca7ed0f2 | 2623 | return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0; |
1da177e4 LT |
2624 | } |
2625 | ||
2626 | /*****************************************************************************/ | |
2627 | ||
2628 | /* | |
2629 | * Return the entire driver board structure to a user app. | |
2630 | */ | |
2631 | ||
ca7ed0f2 | 2632 | static int stl_getbrdstruct(struct stlbrd __user *arg) |
1da177e4 | 2633 | { |
6b2c9457 | 2634 | struct stlbrd stl_dummybrd; |
ca7ed0f2 | 2635 | struct stlbrd *brdp; |
1da177e4 | 2636 | |
ca7ed0f2 | 2637 | if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd))) |
1da177e4 | 2638 | return -EFAULT; |
6b2c9457 | 2639 | if (stl_dummybrd.brdnr >= STL_MAXBRDS) |
1da177e4 LT |
2640 | return -ENODEV; |
2641 | brdp = stl_brds[stl_dummybrd.brdnr]; | |
2642 | if (!brdp) | |
c62429d9 | 2643 | return -ENODEV; |
ca7ed0f2 | 2644 | return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0; |
1da177e4 LT |
2645 | } |
2646 | ||
2647 | /*****************************************************************************/ | |
2648 | ||
2649 | /* | |
2650 | * The "staliomem" device is also required to do some special operations | |
2651 | * on the board and/or ports. In this driver it is mostly used for stats | |
2652 | * collection. | |
2653 | */ | |
2654 | ||
2655 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) | |
2656 | { | |
2657 | int brdnr, rc; | |
2658 | void __user *argp = (void __user *)arg; | |
2659 | ||
a0564e14 | 2660 | pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg); |
1da177e4 LT |
2661 | |
2662 | brdnr = iminor(ip); | |
2663 | if (brdnr >= STL_MAXBRDS) | |
c62429d9 | 2664 | return -ENODEV; |
1da177e4 LT |
2665 | rc = 0; |
2666 | ||
2667 | switch (cmd) { | |
2668 | case COM_GETPORTSTATS: | |
2669 | rc = stl_getportstats(NULL, argp); | |
2670 | break; | |
2671 | case COM_CLRPORTSTATS: | |
2672 | rc = stl_clrportstats(NULL, argp); | |
2673 | break; | |
2674 | case COM_GETBRDSTATS: | |
2675 | rc = stl_getbrdstats(argp); | |
2676 | break; | |
2677 | case COM_READPORT: | |
2678 | rc = stl_getportstruct(argp); | |
2679 | break; | |
2680 | case COM_READBOARD: | |
2681 | rc = stl_getbrdstruct(argp); | |
2682 | break; | |
2683 | default: | |
2684 | rc = -ENOIOCTLCMD; | |
2685 | break; | |
2686 | } | |
2687 | ||
c62429d9 | 2688 | return rc; |
1da177e4 LT |
2689 | } |
2690 | ||
b68e31d0 | 2691 | static const struct tty_operations stl_ops = { |
1da177e4 LT |
2692 | .open = stl_open, |
2693 | .close = stl_close, | |
2694 | .write = stl_write, | |
2695 | .put_char = stl_putchar, | |
2696 | .flush_chars = stl_flushchars, | |
2697 | .write_room = stl_writeroom, | |
2698 | .chars_in_buffer = stl_charsinbuffer, | |
2699 | .ioctl = stl_ioctl, | |
2700 | .set_termios = stl_settermios, | |
2701 | .throttle = stl_throttle, | |
2702 | .unthrottle = stl_unthrottle, | |
2703 | .stop = stl_stop, | |
2704 | .start = stl_start, | |
2705 | .hangup = stl_hangup, | |
2706 | .flush_buffer = stl_flushbuffer, | |
2707 | .break_ctl = stl_breakctl, | |
2708 | .wait_until_sent = stl_waituntilsent, | |
2709 | .send_xchar = stl_sendxchar, | |
2710 | .read_proc = stl_readproc, | |
2711 | .tiocmget = stl_tiocmget, | |
2712 | .tiocmset = stl_tiocmset, | |
2713 | }; | |
2714 | ||
1da177e4 LT |
2715 | /*****************************************************************************/ |
2716 | /* CD1400 HARDWARE FUNCTIONS */ | |
2717 | /*****************************************************************************/ | |
2718 | ||
2719 | /* | |
2720 | * These functions get/set/update the registers of the cd1400 UARTs. | |
2721 | * Access to the cd1400 registers is via an address/data io port pair. | |
2722 | * (Maybe should make this inline...) | |
2723 | */ | |
2724 | ||
ca7ed0f2 | 2725 | static int stl_cd1400getreg(struct stlport *portp, int regnr) |
1da177e4 LT |
2726 | { |
2727 | outb((regnr + portp->uartaddr), portp->ioaddr); | |
014c2544 | 2728 | return inb(portp->ioaddr + EREG_DATA); |
1da177e4 LT |
2729 | } |
2730 | ||
ca7ed0f2 | 2731 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value) |
1da177e4 | 2732 | { |
c62429d9 | 2733 | outb(regnr + portp->uartaddr, portp->ioaddr); |
1da177e4 LT |
2734 | outb(value, portp->ioaddr + EREG_DATA); |
2735 | } | |
2736 | ||
ca7ed0f2 | 2737 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value) |
1da177e4 | 2738 | { |
c62429d9 | 2739 | outb(regnr + portp->uartaddr, portp->ioaddr); |
1da177e4 LT |
2740 | if (inb(portp->ioaddr + EREG_DATA) != value) { |
2741 | outb(value, portp->ioaddr + EREG_DATA); | |
014c2544 | 2742 | return 1; |
1da177e4 | 2743 | } |
014c2544 | 2744 | return 0; |
1da177e4 LT |
2745 | } |
2746 | ||
2747 | /*****************************************************************************/ | |
2748 | ||
2749 | /* | |
2750 | * Inbitialize the UARTs in a panel. We don't care what sort of board | |
2751 | * these ports are on - since the port io registers are almost | |
2752 | * identical when dealing with ports. | |
2753 | */ | |
2754 | ||
ca7ed0f2 | 2755 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
1da177e4 LT |
2756 | { |
2757 | unsigned int gfrcr; | |
2758 | int chipmask, i, j; | |
2759 | int nrchips, uartaddr, ioaddr; | |
b65b5b59 | 2760 | unsigned long flags; |
1da177e4 | 2761 | |
a0564e14 | 2762 | pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
1da177e4 | 2763 | |
b65b5b59 | 2764 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
2765 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
2766 | ||
2767 | /* | |
2768 | * Check that each chip is present and started up OK. | |
2769 | */ | |
2770 | chipmask = 0; | |
2771 | nrchips = panelp->nrports / CD1400_PORTS; | |
c62429d9 | 2772 | for (i = 0; i < nrchips; i++) { |
1da177e4 LT |
2773 | if (brdp->brdtype == BRD_ECHPCI) { |
2774 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); | |
2775 | ioaddr = panelp->iobase; | |
c62429d9 | 2776 | } else |
1da177e4 | 2777 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); |
1da177e4 LT |
2778 | uartaddr = (i & 0x01) ? 0x080 : 0; |
2779 | outb((GFRCR + uartaddr), ioaddr); | |
2780 | outb(0, (ioaddr + EREG_DATA)); | |
2781 | outb((CCR + uartaddr), ioaddr); | |
2782 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); | |
2783 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); | |
2784 | outb((GFRCR + uartaddr), ioaddr); | |
c62429d9 | 2785 | for (j = 0; j < CCR_MAXWAIT; j++) |
1da177e4 LT |
2786 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) |
2787 | break; | |
c62429d9 | 2788 | |
1da177e4 LT |
2789 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { |
2790 | printk("STALLION: cd1400 not responding, " | |
2791 | "brd=%d panel=%d chip=%d\n", | |
2792 | panelp->brdnr, panelp->panelnr, i); | |
2793 | continue; | |
2794 | } | |
2795 | chipmask |= (0x1 << i); | |
2796 | outb((PPR + uartaddr), ioaddr); | |
2797 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); | |
2798 | } | |
2799 | ||
2800 | BRDDISABLE(panelp->brdnr); | |
b65b5b59 | 2801 | spin_unlock_irqrestore(&brd_lock, flags); |
014c2544 | 2802 | return chipmask; |
1da177e4 LT |
2803 | } |
2804 | ||
2805 | /*****************************************************************************/ | |
2806 | ||
2807 | /* | |
2808 | * Initialize hardware specific port registers. | |
2809 | */ | |
2810 | ||
ca7ed0f2 | 2811 | static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
1da177e4 | 2812 | { |
b65b5b59 | 2813 | unsigned long flags; |
a0564e14 JS |
2814 | pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
2815 | panelp, portp); | |
1da177e4 | 2816 | |
615e4a71 JS |
2817 | if ((brdp == NULL) || (panelp == NULL) || |
2818 | (portp == NULL)) | |
1da177e4 LT |
2819 | return; |
2820 | ||
b65b5b59 | 2821 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
2822 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
2823 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); | |
2824 | portp->uartaddr = (portp->portnr & 0x04) << 5; | |
2825 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); | |
2826 | ||
2827 | BRDENABLE(portp->brdnr, portp->pagenr); | |
2828 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
2829 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); | |
2830 | portp->hwid = stl_cd1400getreg(portp, GFRCR); | |
2831 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 2832 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
2833 | } |
2834 | ||
2835 | /*****************************************************************************/ | |
2836 | ||
2837 | /* | |
2838 | * Wait for the command register to be ready. We will poll this, | |
2839 | * since it won't usually take too long to be ready. | |
2840 | */ | |
2841 | ||
ca7ed0f2 | 2842 | static void stl_cd1400ccrwait(struct stlport *portp) |
1da177e4 LT |
2843 | { |
2844 | int i; | |
2845 | ||
c62429d9 JS |
2846 | for (i = 0; i < CCR_MAXWAIT; i++) |
2847 | if (stl_cd1400getreg(portp, CCR) == 0) | |
1da177e4 | 2848 | return; |
1da177e4 LT |
2849 | |
2850 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", | |
2851 | portp->portnr, portp->panelnr, portp->brdnr); | |
2852 | } | |
2853 | ||
2854 | /*****************************************************************************/ | |
2855 | ||
2856 | /* | |
2857 | * Set up the cd1400 registers for a port based on the termios port | |
2858 | * settings. | |
2859 | */ | |
2860 | ||
606d099c | 2861 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp) |
1da177e4 | 2862 | { |
ca7ed0f2 | 2863 | struct stlbrd *brdp; |
1da177e4 LT |
2864 | unsigned long flags; |
2865 | unsigned int clkdiv, baudrate; | |
2866 | unsigned char cor1, cor2, cor3; | |
2867 | unsigned char cor4, cor5, ccr; | |
2868 | unsigned char srer, sreron, sreroff; | |
2869 | unsigned char mcor1, mcor2, rtpr; | |
2870 | unsigned char clk, div; | |
2871 | ||
2872 | cor1 = 0; | |
2873 | cor2 = 0; | |
2874 | cor3 = 0; | |
2875 | cor4 = 0; | |
2876 | cor5 = 0; | |
2877 | ccr = 0; | |
2878 | rtpr = 0; | |
2879 | clk = 0; | |
2880 | div = 0; | |
2881 | mcor1 = 0; | |
2882 | mcor2 = 0; | |
2883 | sreron = 0; | |
2884 | sreroff = 0; | |
2885 | ||
2886 | brdp = stl_brds[portp->brdnr]; | |
615e4a71 | 2887 | if (brdp == NULL) |
1da177e4 LT |
2888 | return; |
2889 | ||
2890 | /* | |
2891 | * Set up the RX char ignore mask with those RX error types we | |
2892 | * can ignore. We can get the cd1400 to help us out a little here, | |
2893 | * it will ignore parity errors and breaks for us. | |
2894 | */ | |
2895 | portp->rxignoremsk = 0; | |
2896 | if (tiosp->c_iflag & IGNPAR) { | |
2897 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); | |
2898 | cor1 |= COR1_PARIGNORE; | |
2899 | } | |
2900 | if (tiosp->c_iflag & IGNBRK) { | |
2901 | portp->rxignoremsk |= ST_BREAK; | |
2902 | cor4 |= COR4_IGNBRK; | |
2903 | } | |
2904 | ||
2905 | portp->rxmarkmsk = ST_OVERRUN; | |
2906 | if (tiosp->c_iflag & (INPCK | PARMRK)) | |
2907 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); | |
2908 | if (tiosp->c_iflag & BRKINT) | |
2909 | portp->rxmarkmsk |= ST_BREAK; | |
2910 | ||
2911 | /* | |
2912 | * Go through the char size, parity and stop bits and set all the | |
2913 | * option register appropriately. | |
2914 | */ | |
2915 | switch (tiosp->c_cflag & CSIZE) { | |
2916 | case CS5: | |
2917 | cor1 |= COR1_CHL5; | |
2918 | break; | |
2919 | case CS6: | |
2920 | cor1 |= COR1_CHL6; | |
2921 | break; | |
2922 | case CS7: | |
2923 | cor1 |= COR1_CHL7; | |
2924 | break; | |
2925 | default: | |
2926 | cor1 |= COR1_CHL8; | |
2927 | break; | |
2928 | } | |
2929 | ||
2930 | if (tiosp->c_cflag & CSTOPB) | |
2931 | cor1 |= COR1_STOP2; | |
2932 | else | |
2933 | cor1 |= COR1_STOP1; | |
2934 | ||
2935 | if (tiosp->c_cflag & PARENB) { | |
2936 | if (tiosp->c_cflag & PARODD) | |
2937 | cor1 |= (COR1_PARENB | COR1_PARODD); | |
2938 | else | |
2939 | cor1 |= (COR1_PARENB | COR1_PAREVEN); | |
2940 | } else { | |
2941 | cor1 |= COR1_PARNONE; | |
2942 | } | |
2943 | ||
2944 | /* | |
2945 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing | |
2946 | * space for hardware flow control and the like. This should be set to | |
2947 | * VMIN. Also here we will set the RX data timeout to 10ms - this should | |
2948 | * really be based on VTIME. | |
2949 | */ | |
2950 | cor3 |= FIFO_RXTHRESHOLD; | |
2951 | rtpr = 2; | |
2952 | ||
2953 | /* | |
2954 | * Calculate the baud rate timers. For now we will just assume that | |
2955 | * the input and output baud are the same. Could have used a baud | |
2956 | * table here, but this way we can generate virtually any baud rate | |
2957 | * we like! | |
2958 | */ | |
2959 | baudrate = tiosp->c_cflag & CBAUD; | |
2960 | if (baudrate & CBAUDEX) { | |
2961 | baudrate &= ~CBAUDEX; | |
2962 | if ((baudrate < 1) || (baudrate > 4)) | |
2963 | tiosp->c_cflag &= ~CBAUDEX; | |
2964 | else | |
2965 | baudrate += 15; | |
2966 | } | |
2967 | baudrate = stl_baudrates[baudrate]; | |
2968 | if ((tiosp->c_cflag & CBAUD) == B38400) { | |
2969 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
2970 | baudrate = 57600; | |
2971 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
2972 | baudrate = 115200; | |
2973 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) | |
2974 | baudrate = 230400; | |
2975 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
2976 | baudrate = 460800; | |
2977 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) | |
2978 | baudrate = (portp->baud_base / portp->custom_divisor); | |
2979 | } | |
2980 | if (baudrate > STL_CD1400MAXBAUD) | |
2981 | baudrate = STL_CD1400MAXBAUD; | |
2982 | ||
2983 | if (baudrate > 0) { | |
c62429d9 JS |
2984 | for (clk = 0; clk < CD1400_NUMCLKS; clk++) { |
2985 | clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate; | |
1da177e4 LT |
2986 | if (clkdiv < 0x100) |
2987 | break; | |
2988 | } | |
2989 | div = (unsigned char) clkdiv; | |
2990 | } | |
2991 | ||
2992 | /* | |
2993 | * Check what form of modem signaling is required and set it up. | |
2994 | */ | |
2995 | if ((tiosp->c_cflag & CLOCAL) == 0) { | |
2996 | mcor1 |= MCOR1_DCD; | |
2997 | mcor2 |= MCOR2_DCD; | |
2998 | sreron |= SRER_MODEM; | |
2999 | portp->flags |= ASYNC_CHECK_CD; | |
c62429d9 | 3000 | } else |
1da177e4 | 3001 | portp->flags &= ~ASYNC_CHECK_CD; |
1da177e4 LT |
3002 | |
3003 | /* | |
3004 | * Setup cd1400 enhanced modes if we can. In particular we want to | |
3005 | * handle as much of the flow control as possible automatically. As | |
3006 | * well as saving a few CPU cycles it will also greatly improve flow | |
3007 | * control reliability. | |
3008 | */ | |
3009 | if (tiosp->c_iflag & IXON) { | |
3010 | cor2 |= COR2_TXIBE; | |
3011 | cor3 |= COR3_SCD12; | |
3012 | if (tiosp->c_iflag & IXANY) | |
3013 | cor2 |= COR2_IXM; | |
3014 | } | |
3015 | ||
3016 | if (tiosp->c_cflag & CRTSCTS) { | |
3017 | cor2 |= COR2_CTSAE; | |
3018 | mcor1 |= FIFO_RTSTHRESHOLD; | |
3019 | } | |
3020 | ||
3021 | /* | |
3022 | * All cd1400 register values calculated so go through and set | |
3023 | * them all up. | |
3024 | */ | |
3025 | ||
a0564e14 | 3026 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
1da177e4 | 3027 | portp->portnr, portp->panelnr, portp->brdnr); |
a0564e14 | 3028 | pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", |
1da177e4 | 3029 | cor1, cor2, cor3, cor4, cor5); |
a0564e14 | 3030 | pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", |
1da177e4 | 3031 | mcor1, mcor2, rtpr, sreron, sreroff); |
a0564e14 JS |
3032 | pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
3033 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", | |
1da177e4 LT |
3034 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
3035 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); | |
1da177e4 | 3036 | |
b65b5b59 | 3037 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3038 | BRDENABLE(portp->brdnr, portp->pagenr); |
3039 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); | |
3040 | srer = stl_cd1400getreg(portp, SRER); | |
3041 | stl_cd1400setreg(portp, SRER, 0); | |
3042 | if (stl_cd1400updatereg(portp, COR1, cor1)) | |
3043 | ccr = 1; | |
3044 | if (stl_cd1400updatereg(portp, COR2, cor2)) | |
3045 | ccr = 1; | |
3046 | if (stl_cd1400updatereg(portp, COR3, cor3)) | |
3047 | ccr = 1; | |
3048 | if (ccr) { | |
3049 | stl_cd1400ccrwait(portp); | |
3050 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); | |
3051 | } | |
3052 | stl_cd1400setreg(portp, COR4, cor4); | |
3053 | stl_cd1400setreg(portp, COR5, cor5); | |
3054 | stl_cd1400setreg(portp, MCOR1, mcor1); | |
3055 | stl_cd1400setreg(portp, MCOR2, mcor2); | |
3056 | if (baudrate > 0) { | |
3057 | stl_cd1400setreg(portp, TCOR, clk); | |
3058 | stl_cd1400setreg(portp, TBPR, div); | |
3059 | stl_cd1400setreg(portp, RCOR, clk); | |
3060 | stl_cd1400setreg(portp, RBPR, div); | |
3061 | } | |
3062 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); | |
3063 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); | |
3064 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); | |
3065 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); | |
3066 | stl_cd1400setreg(portp, RTPR, rtpr); | |
3067 | mcor1 = stl_cd1400getreg(portp, MSVR1); | |
3068 | if (mcor1 & MSVR1_DCD) | |
3069 | portp->sigs |= TIOCM_CD; | |
3070 | else | |
3071 | portp->sigs &= ~TIOCM_CD; | |
3072 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); | |
3073 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3074 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3075 | } |
3076 | ||
3077 | /*****************************************************************************/ | |
3078 | ||
3079 | /* | |
3080 | * Set the state of the DTR and RTS signals. | |
3081 | */ | |
3082 | ||
ca7ed0f2 | 3083 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts) |
1da177e4 LT |
3084 | { |
3085 | unsigned char msvr1, msvr2; | |
3086 | unsigned long flags; | |
3087 | ||
a0564e14 JS |
3088 | pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n", |
3089 | portp, dtr, rts); | |
1da177e4 LT |
3090 | |
3091 | msvr1 = 0; | |
3092 | msvr2 = 0; | |
3093 | if (dtr > 0) | |
3094 | msvr1 = MSVR1_DTR; | |
3095 | if (rts > 0) | |
3096 | msvr2 = MSVR2_RTS; | |
3097 | ||
b65b5b59 | 3098 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3099 | BRDENABLE(portp->brdnr, portp->pagenr); |
3100 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3101 | if (rts >= 0) | |
3102 | stl_cd1400setreg(portp, MSVR2, msvr2); | |
3103 | if (dtr >= 0) | |
3104 | stl_cd1400setreg(portp, MSVR1, msvr1); | |
3105 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3106 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3107 | } |
3108 | ||
3109 | /*****************************************************************************/ | |
3110 | ||
3111 | /* | |
3112 | * Return the state of the signals. | |
3113 | */ | |
3114 | ||
ca7ed0f2 | 3115 | static int stl_cd1400getsignals(struct stlport *portp) |
1da177e4 LT |
3116 | { |
3117 | unsigned char msvr1, msvr2; | |
3118 | unsigned long flags; | |
3119 | int sigs; | |
3120 | ||
a0564e14 | 3121 | pr_debug("stl_cd1400getsignals(portp=%p)\n", portp); |
1da177e4 | 3122 | |
b65b5b59 | 3123 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3124 | BRDENABLE(portp->brdnr, portp->pagenr); |
3125 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3126 | msvr1 = stl_cd1400getreg(portp, MSVR1); | |
3127 | msvr2 = stl_cd1400getreg(portp, MSVR2); | |
3128 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3129 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3130 | |
3131 | sigs = 0; | |
3132 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; | |
3133 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; | |
3134 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; | |
3135 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; | |
3136 | #if 0 | |
3137 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; | |
3138 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; | |
3139 | #else | |
3140 | sigs |= TIOCM_DSR; | |
3141 | #endif | |
014c2544 | 3142 | return sigs; |
1da177e4 LT |
3143 | } |
3144 | ||
3145 | /*****************************************************************************/ | |
3146 | ||
3147 | /* | |
3148 | * Enable/Disable the Transmitter and/or Receiver. | |
3149 | */ | |
3150 | ||
ca7ed0f2 | 3151 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
3152 | { |
3153 | unsigned char ccr; | |
3154 | unsigned long flags; | |
3155 | ||
a0564e14 JS |
3156 | pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
3157 | ||
1da177e4 LT |
3158 | ccr = 0; |
3159 | ||
3160 | if (tx == 0) | |
3161 | ccr |= CCR_TXDISABLE; | |
3162 | else if (tx > 0) | |
3163 | ccr |= CCR_TXENABLE; | |
3164 | if (rx == 0) | |
3165 | ccr |= CCR_RXDISABLE; | |
3166 | else if (rx > 0) | |
3167 | ccr |= CCR_RXENABLE; | |
3168 | ||
b65b5b59 | 3169 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3170 | BRDENABLE(portp->brdnr, portp->pagenr); |
3171 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3172 | stl_cd1400ccrwait(portp); | |
3173 | stl_cd1400setreg(portp, CCR, ccr); | |
3174 | stl_cd1400ccrwait(portp); | |
3175 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3176 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3177 | } |
3178 | ||
3179 | /*****************************************************************************/ | |
3180 | ||
3181 | /* | |
3182 | * Start/stop the Transmitter and/or Receiver. | |
3183 | */ | |
3184 | ||
ca7ed0f2 | 3185 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
3186 | { |
3187 | unsigned char sreron, sreroff; | |
3188 | unsigned long flags; | |
3189 | ||
a0564e14 | 3190 | pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
1da177e4 LT |
3191 | |
3192 | sreron = 0; | |
3193 | sreroff = 0; | |
3194 | if (tx == 0) | |
3195 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); | |
3196 | else if (tx == 1) | |
3197 | sreron |= SRER_TXDATA; | |
3198 | else if (tx >= 2) | |
3199 | sreron |= SRER_TXEMPTY; | |
3200 | if (rx == 0) | |
3201 | sreroff |= SRER_RXDATA; | |
3202 | else if (rx > 0) | |
3203 | sreron |= SRER_RXDATA; | |
3204 | ||
b65b5b59 | 3205 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3206 | BRDENABLE(portp->brdnr, portp->pagenr); |
3207 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3208 | stl_cd1400setreg(portp, SRER, | |
3209 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); | |
3210 | BRDDISABLE(portp->brdnr); | |
3211 | if (tx > 0) | |
3212 | set_bit(ASYI_TXBUSY, &portp->istate); | |
b65b5b59 | 3213 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3214 | } |
3215 | ||
3216 | /*****************************************************************************/ | |
3217 | ||
3218 | /* | |
3219 | * Disable all interrupts from this port. | |
3220 | */ | |
3221 | ||
ca7ed0f2 | 3222 | static void stl_cd1400disableintrs(struct stlport *portp) |
1da177e4 LT |
3223 | { |
3224 | unsigned long flags; | |
3225 | ||
a0564e14 JS |
3226 | pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp); |
3227 | ||
b65b5b59 | 3228 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3229 | BRDENABLE(portp->brdnr, portp->pagenr); |
3230 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3231 | stl_cd1400setreg(portp, SRER, 0); | |
3232 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3233 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3234 | } |
3235 | ||
3236 | /*****************************************************************************/ | |
3237 | ||
ca7ed0f2 | 3238 | static void stl_cd1400sendbreak(struct stlport *portp, int len) |
1da177e4 LT |
3239 | { |
3240 | unsigned long flags; | |
3241 | ||
a0564e14 | 3242 | pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len); |
1da177e4 | 3243 | |
b65b5b59 | 3244 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3245 | BRDENABLE(portp->brdnr, portp->pagenr); |
3246 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3247 | stl_cd1400setreg(portp, SRER, | |
3248 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | | |
3249 | SRER_TXEMPTY)); | |
3250 | BRDDISABLE(portp->brdnr); | |
3251 | portp->brklen = len; | |
3252 | if (len == 1) | |
3253 | portp->stats.txbreaks++; | |
b65b5b59 | 3254 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3255 | } |
3256 | ||
3257 | /*****************************************************************************/ | |
3258 | ||
3259 | /* | |
3260 | * Take flow control actions... | |
3261 | */ | |
3262 | ||
ca7ed0f2 | 3263 | static void stl_cd1400flowctrl(struct stlport *portp, int state) |
1da177e4 LT |
3264 | { |
3265 | struct tty_struct *tty; | |
3266 | unsigned long flags; | |
3267 | ||
a0564e14 | 3268 | pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 3269 | |
615e4a71 | 3270 | if (portp == NULL) |
1da177e4 LT |
3271 | return; |
3272 | tty = portp->tty; | |
615e4a71 | 3273 | if (tty == NULL) |
1da177e4 LT |
3274 | return; |
3275 | ||
b65b5b59 | 3276 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3277 | BRDENABLE(portp->brdnr, portp->pagenr); |
3278 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3279 | ||
3280 | if (state) { | |
3281 | if (tty->termios->c_iflag & IXOFF) { | |
3282 | stl_cd1400ccrwait(portp); | |
3283 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); | |
3284 | portp->stats.rxxon++; | |
3285 | stl_cd1400ccrwait(portp); | |
3286 | } | |
3287 | /* | |
3288 | * Question: should we return RTS to what it was before? It may | |
3289 | * have been set by an ioctl... Suppose not, since if you have | |
3290 | * hardware flow control set then it is pretty silly to go and | |
3291 | * set the RTS line by hand. | |
3292 | */ | |
3293 | if (tty->termios->c_cflag & CRTSCTS) { | |
3294 | stl_cd1400setreg(portp, MCOR1, | |
3295 | (stl_cd1400getreg(portp, MCOR1) | | |
3296 | FIFO_RTSTHRESHOLD)); | |
3297 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); | |
3298 | portp->stats.rxrtson++; | |
3299 | } | |
3300 | } else { | |
3301 | if (tty->termios->c_iflag & IXOFF) { | |
3302 | stl_cd1400ccrwait(portp); | |
3303 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); | |
3304 | portp->stats.rxxoff++; | |
3305 | stl_cd1400ccrwait(portp); | |
3306 | } | |
3307 | if (tty->termios->c_cflag & CRTSCTS) { | |
3308 | stl_cd1400setreg(portp, MCOR1, | |
3309 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); | |
3310 | stl_cd1400setreg(portp, MSVR2, 0); | |
3311 | portp->stats.rxrtsoff++; | |
3312 | } | |
3313 | } | |
3314 | ||
3315 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3316 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3317 | } |
3318 | ||
3319 | /*****************************************************************************/ | |
3320 | ||
3321 | /* | |
3322 | * Send a flow control character... | |
3323 | */ | |
3324 | ||
ca7ed0f2 | 3325 | static void stl_cd1400sendflow(struct stlport *portp, int state) |
1da177e4 LT |
3326 | { |
3327 | struct tty_struct *tty; | |
3328 | unsigned long flags; | |
3329 | ||
a0564e14 | 3330 | pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 3331 | |
615e4a71 | 3332 | if (portp == NULL) |
1da177e4 LT |
3333 | return; |
3334 | tty = portp->tty; | |
615e4a71 | 3335 | if (tty == NULL) |
1da177e4 LT |
3336 | return; |
3337 | ||
b65b5b59 | 3338 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3339 | BRDENABLE(portp->brdnr, portp->pagenr); |
3340 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3341 | if (state) { | |
3342 | stl_cd1400ccrwait(portp); | |
3343 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); | |
3344 | portp->stats.rxxon++; | |
3345 | stl_cd1400ccrwait(portp); | |
3346 | } else { | |
3347 | stl_cd1400ccrwait(portp); | |
3348 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); | |
3349 | portp->stats.rxxoff++; | |
3350 | stl_cd1400ccrwait(portp); | |
3351 | } | |
3352 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3353 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3354 | } |
3355 | ||
3356 | /*****************************************************************************/ | |
3357 | ||
ca7ed0f2 | 3358 | static void stl_cd1400flush(struct stlport *portp) |
1da177e4 LT |
3359 | { |
3360 | unsigned long flags; | |
3361 | ||
a0564e14 | 3362 | pr_debug("stl_cd1400flush(portp=%p)\n", portp); |
1da177e4 | 3363 | |
615e4a71 | 3364 | if (portp == NULL) |
1da177e4 LT |
3365 | return; |
3366 | ||
b65b5b59 | 3367 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3368 | BRDENABLE(portp->brdnr, portp->pagenr); |
3369 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); | |
3370 | stl_cd1400ccrwait(portp); | |
3371 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); | |
3372 | stl_cd1400ccrwait(portp); | |
3373 | portp->tx.tail = portp->tx.head; | |
3374 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 3375 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
3376 | } |
3377 | ||
3378 | /*****************************************************************************/ | |
3379 | ||
3380 | /* | |
3381 | * Return the current state of data flow on this port. This is only | |
3382 | * really interresting when determining if data has fully completed | |
3383 | * transmission or not... This is easy for the cd1400, it accurately | |
3384 | * maintains the busy port flag. | |
3385 | */ | |
3386 | ||
ca7ed0f2 | 3387 | static int stl_cd1400datastate(struct stlport *portp) |
1da177e4 | 3388 | { |
a0564e14 | 3389 | pr_debug("stl_cd1400datastate(portp=%p)\n", portp); |
1da177e4 | 3390 | |
615e4a71 | 3391 | if (portp == NULL) |
014c2544 | 3392 | return 0; |
1da177e4 | 3393 | |
014c2544 | 3394 | return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
1da177e4 LT |
3395 | } |
3396 | ||
3397 | /*****************************************************************************/ | |
3398 | ||
3399 | /* | |
3400 | * Interrupt service routine for cd1400 EasyIO boards. | |
3401 | */ | |
3402 | ||
ca7ed0f2 | 3403 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase) |
1da177e4 LT |
3404 | { |
3405 | unsigned char svrtype; | |
3406 | ||
a0564e14 | 3407 | pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase); |
1da177e4 | 3408 | |
b65b5b59 | 3409 | spin_lock(&brd_lock); |
1da177e4 LT |
3410 | outb(SVRR, iobase); |
3411 | svrtype = inb(iobase + EREG_DATA); | |
3412 | if (panelp->nrports > 4) { | |
3413 | outb((SVRR + 0x80), iobase); | |
3414 | svrtype |= inb(iobase + EREG_DATA); | |
3415 | } | |
3416 | ||
3417 | if (svrtype & SVRR_RX) | |
3418 | stl_cd1400rxisr(panelp, iobase); | |
3419 | else if (svrtype & SVRR_TX) | |
3420 | stl_cd1400txisr(panelp, iobase); | |
3421 | else if (svrtype & SVRR_MDM) | |
3422 | stl_cd1400mdmisr(panelp, iobase); | |
b65b5b59 AC |
3423 | |
3424 | spin_unlock(&brd_lock); | |
1da177e4 LT |
3425 | } |
3426 | ||
3427 | /*****************************************************************************/ | |
3428 | ||
3429 | /* | |
3430 | * Interrupt service routine for cd1400 panels. | |
3431 | */ | |
3432 | ||
ca7ed0f2 | 3433 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase) |
1da177e4 LT |
3434 | { |
3435 | unsigned char svrtype; | |
3436 | ||
a0564e14 | 3437 | pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase); |
1da177e4 LT |
3438 | |
3439 | outb(SVRR, iobase); | |
3440 | svrtype = inb(iobase + EREG_DATA); | |
3441 | outb((SVRR + 0x80), iobase); | |
3442 | svrtype |= inb(iobase + EREG_DATA); | |
3443 | if (svrtype & SVRR_RX) | |
3444 | stl_cd1400rxisr(panelp, iobase); | |
3445 | else if (svrtype & SVRR_TX) | |
3446 | stl_cd1400txisr(panelp, iobase); | |
3447 | else if (svrtype & SVRR_MDM) | |
3448 | stl_cd1400mdmisr(panelp, iobase); | |
3449 | } | |
3450 | ||
3451 | ||
3452 | /*****************************************************************************/ | |
3453 | ||
3454 | /* | |
3455 | * Unfortunately we need to handle breaks in the TX data stream, since | |
3456 | * this is the only way to generate them on the cd1400. | |
3457 | */ | |
3458 | ||
60be4810 | 3459 | static int stl_cd1400breakisr(struct stlport *portp, int ioaddr) |
1da177e4 LT |
3460 | { |
3461 | if (portp->brklen == 1) { | |
3462 | outb((COR2 + portp->uartaddr), ioaddr); | |
3463 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), | |
3464 | (ioaddr + EREG_DATA)); | |
3465 | outb((TDR + portp->uartaddr), ioaddr); | |
3466 | outb(ETC_CMD, (ioaddr + EREG_DATA)); | |
3467 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); | |
3468 | outb((SRER + portp->uartaddr), ioaddr); | |
3469 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), | |
3470 | (ioaddr + EREG_DATA)); | |
014c2544 | 3471 | return 1; |
1da177e4 LT |
3472 | } else if (portp->brklen > 1) { |
3473 | outb((TDR + portp->uartaddr), ioaddr); | |
3474 | outb(ETC_CMD, (ioaddr + EREG_DATA)); | |
3475 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); | |
3476 | portp->brklen = -1; | |
014c2544 | 3477 | return 1; |
1da177e4 LT |
3478 | } else { |
3479 | outb((COR2 + portp->uartaddr), ioaddr); | |
3480 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), | |
3481 | (ioaddr + EREG_DATA)); | |
3482 | portp->brklen = 0; | |
3483 | } | |
014c2544 | 3484 | return 0; |
1da177e4 LT |
3485 | } |
3486 | ||
3487 | /*****************************************************************************/ | |
3488 | ||
3489 | /* | |
3490 | * Transmit interrupt handler. This has gotta be fast! Handling TX | |
3491 | * chars is pretty simple, stuff as many as possible from the TX buffer | |
3492 | * into the cd1400 FIFO. Must also handle TX breaks here, since they | |
3493 | * are embedded as commands in the data stream. Oh no, had to use a goto! | |
3494 | * This could be optimized more, will do when I get time... | |
3495 | * In practice it is possible that interrupts are enabled but that the | |
3496 | * port has been hung up. Need to handle not having any TX buffer here, | |
3497 | * this is done by using the side effect that head and tail will also | |
3498 | * be NULL if the buffer has been freed. | |
3499 | */ | |
3500 | ||
ca7ed0f2 | 3501 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr) |
1da177e4 | 3502 | { |
ca7ed0f2 | 3503 | struct stlport *portp; |
1da177e4 LT |
3504 | int len, stlen; |
3505 | char *head, *tail; | |
3506 | unsigned char ioack, srer; | |
3507 | ||
a0564e14 | 3508 | pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
1da177e4 LT |
3509 | |
3510 | ioack = inb(ioaddr + EREG_TXACK); | |
3511 | if (((ioack & panelp->ackmask) != 0) || | |
3512 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { | |
3513 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); | |
3514 | return; | |
3515 | } | |
3516 | portp = panelp->ports[(ioack >> 3)]; | |
3517 | ||
3518 | /* | |
3519 | * Unfortunately we need to handle breaks in the data stream, since | |
3520 | * this is the only way to generate them on the cd1400. Do it now if | |
3521 | * a break is to be sent. | |
3522 | */ | |
3523 | if (portp->brklen != 0) | |
3524 | if (stl_cd1400breakisr(portp, ioaddr)) | |
3525 | goto stl_txalldone; | |
3526 | ||
3527 | head = portp->tx.head; | |
3528 | tail = portp->tx.tail; | |
3529 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
3530 | if ((len == 0) || ((len < STL_TXBUFLOW) && | |
3531 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { | |
3532 | set_bit(ASYI_TXLOW, &portp->istate); | |
3533 | schedule_work(&portp->tqueue); | |
3534 | } | |
3535 | ||
3536 | if (len == 0) { | |
3537 | outb((SRER + portp->uartaddr), ioaddr); | |
3538 | srer = inb(ioaddr + EREG_DATA); | |
3539 | if (srer & SRER_TXDATA) { | |
3540 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; | |
3541 | } else { | |
3542 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); | |
3543 | clear_bit(ASYI_TXBUSY, &portp->istate); | |
3544 | } | |
3545 | outb(srer, (ioaddr + EREG_DATA)); | |
3546 | } else { | |
843b568c | 3547 | len = min(len, CD1400_TXFIFOSIZE); |
1da177e4 | 3548 | portp->stats.txtotal += len; |
843b568c | 3549 | stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
1da177e4 LT |
3550 | outb((TDR + portp->uartaddr), ioaddr); |
3551 | outsb((ioaddr + EREG_DATA), tail, stlen); | |
3552 | len -= stlen; | |
3553 | tail += stlen; | |
3554 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) | |
3555 | tail = portp->tx.buf; | |
3556 | if (len > 0) { | |
3557 | outsb((ioaddr + EREG_DATA), tail, len); | |
3558 | tail += len; | |
3559 | } | |
3560 | portp->tx.tail = tail; | |
3561 | } | |
3562 | ||
3563 | stl_txalldone: | |
3564 | outb((EOSRR + portp->uartaddr), ioaddr); | |
3565 | outb(0, (ioaddr + EREG_DATA)); | |
3566 | } | |
3567 | ||
3568 | /*****************************************************************************/ | |
3569 | ||
3570 | /* | |
3571 | * Receive character interrupt handler. Determine if we have good chars | |
3572 | * or bad chars and then process appropriately. Good chars are easy | |
3573 | * just shove the lot into the RX buffer and set all status byte to 0. | |
3574 | * If a bad RX char then process as required. This routine needs to be | |
3575 | * fast! In practice it is possible that we get an interrupt on a port | |
3576 | * that is closed. This can happen on hangups - since they completely | |
3577 | * shutdown a port not in user context. Need to handle this case. | |
3578 | */ | |
3579 | ||
ca7ed0f2 | 3580 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr) |
1da177e4 | 3581 | { |
ca7ed0f2 | 3582 | struct stlport *portp; |
1da177e4 LT |
3583 | struct tty_struct *tty; |
3584 | unsigned int ioack, len, buflen; | |
3585 | unsigned char status; | |
3586 | char ch; | |
3587 | ||
a0564e14 | 3588 | pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
1da177e4 LT |
3589 | |
3590 | ioack = inb(ioaddr + EREG_RXACK); | |
3591 | if ((ioack & panelp->ackmask) != 0) { | |
3592 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); | |
3593 | return; | |
3594 | } | |
3595 | portp = panelp->ports[(ioack >> 3)]; | |
3596 | tty = portp->tty; | |
3597 | ||
3598 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { | |
3599 | outb((RDCR + portp->uartaddr), ioaddr); | |
3600 | len = inb(ioaddr + EREG_DATA); | |
33f0f88f | 3601 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
843b568c | 3602 | len = min(len, sizeof(stl_unwanted)); |
1da177e4 LT |
3603 | outb((RDSR + portp->uartaddr), ioaddr); |
3604 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); | |
3605 | portp->stats.rxlost += len; | |
3606 | portp->stats.rxtotal += len; | |
3607 | } else { | |
843b568c | 3608 | len = min(len, buflen); |
1da177e4 | 3609 | if (len > 0) { |
33f0f88f | 3610 | unsigned char *ptr; |
1da177e4 | 3611 | outb((RDSR + portp->uartaddr), ioaddr); |
33f0f88f AC |
3612 | tty_prepare_flip_string(tty, &ptr, len); |
3613 | insb((ioaddr + EREG_DATA), ptr, len); | |
1da177e4 LT |
3614 | tty_schedule_flip(tty); |
3615 | portp->stats.rxtotal += len; | |
3616 | } | |
3617 | } | |
3618 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { | |
3619 | outb((RDSR + portp->uartaddr), ioaddr); | |
3620 | status = inb(ioaddr + EREG_DATA); | |
3621 | ch = inb(ioaddr + EREG_DATA); | |
3622 | if (status & ST_PARITY) | |
3623 | portp->stats.rxparity++; | |
3624 | if (status & ST_FRAMING) | |
3625 | portp->stats.rxframing++; | |
3626 | if (status & ST_OVERRUN) | |
3627 | portp->stats.rxoverrun++; | |
3628 | if (status & ST_BREAK) | |
3629 | portp->stats.rxbreaks++; | |
3630 | if (status & ST_SCHARMASK) { | |
3631 | if ((status & ST_SCHARMASK) == ST_SCHAR1) | |
3632 | portp->stats.txxon++; | |
3633 | if ((status & ST_SCHARMASK) == ST_SCHAR2) | |
3634 | portp->stats.txxoff++; | |
3635 | goto stl_rxalldone; | |
3636 | } | |
33f0f88f | 3637 | if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
1da177e4 LT |
3638 | if (portp->rxmarkmsk & status) { |
3639 | if (status & ST_BREAK) { | |
3640 | status = TTY_BREAK; | |
3641 | if (portp->flags & ASYNC_SAK) { | |
3642 | do_SAK(tty); | |
3643 | BRDENABLE(portp->brdnr, portp->pagenr); | |
3644 | } | |
c62429d9 | 3645 | } else if (status & ST_PARITY) |
1da177e4 | 3646 | status = TTY_PARITY; |
c62429d9 | 3647 | else if (status & ST_FRAMING) |
1da177e4 | 3648 | status = TTY_FRAME; |
c62429d9 | 3649 | else if(status & ST_OVERRUN) |
1da177e4 | 3650 | status = TTY_OVERRUN; |
c62429d9 | 3651 | else |
1da177e4 | 3652 | status = 0; |
c62429d9 | 3653 | } else |
1da177e4 | 3654 | status = 0; |
33f0f88f AC |
3655 | tty_insert_flip_char(tty, ch, status); |
3656 | tty_schedule_flip(tty); | |
1da177e4 LT |
3657 | } |
3658 | } else { | |
3659 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); | |
3660 | return; | |
3661 | } | |
3662 | ||
3663 | stl_rxalldone: | |
3664 | outb((EOSRR + portp->uartaddr), ioaddr); | |
3665 | outb(0, (ioaddr + EREG_DATA)); | |
3666 | } | |
3667 | ||
3668 | /*****************************************************************************/ | |
3669 | ||
3670 | /* | |
3671 | * Modem interrupt handler. The is called when the modem signal line | |
3672 | * (DCD) has changed state. Leave most of the work to the off-level | |
3673 | * processing routine. | |
3674 | */ | |
3675 | ||
ca7ed0f2 | 3676 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr) |
1da177e4 | 3677 | { |
ca7ed0f2 | 3678 | struct stlport *portp; |
1da177e4 LT |
3679 | unsigned int ioack; |
3680 | unsigned char misr; | |
3681 | ||
a0564e14 | 3682 | pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp); |
1da177e4 LT |
3683 | |
3684 | ioack = inb(ioaddr + EREG_MDACK); | |
3685 | if (((ioack & panelp->ackmask) != 0) || | |
3686 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { | |
3687 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); | |
3688 | return; | |
3689 | } | |
3690 | portp = panelp->ports[(ioack >> 3)]; | |
3691 | ||
3692 | outb((MISR + portp->uartaddr), ioaddr); | |
3693 | misr = inb(ioaddr + EREG_DATA); | |
3694 | if (misr & MISR_DCD) { | |
3695 | set_bit(ASYI_DCDCHANGE, &portp->istate); | |
3696 | schedule_work(&portp->tqueue); | |
3697 | portp->stats.modem++; | |
3698 | } | |
3699 | ||
3700 | outb((EOSRR + portp->uartaddr), ioaddr); | |
3701 | outb(0, (ioaddr + EREG_DATA)); | |
3702 | } | |
3703 | ||
3704 | /*****************************************************************************/ | |
3705 | /* SC26198 HARDWARE FUNCTIONS */ | |
3706 | /*****************************************************************************/ | |
3707 | ||
3708 | /* | |
3709 | * These functions get/set/update the registers of the sc26198 UARTs. | |
3710 | * Access to the sc26198 registers is via an address/data io port pair. | |
3711 | * (Maybe should make this inline...) | |
3712 | */ | |
3713 | ||
ca7ed0f2 | 3714 | static int stl_sc26198getreg(struct stlport *portp, int regnr) |
1da177e4 LT |
3715 | { |
3716 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
014c2544 | 3717 | return inb(portp->ioaddr + XP_DATA); |
1da177e4 LT |
3718 | } |
3719 | ||
ca7ed0f2 | 3720 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
3721 | { |
3722 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
3723 | outb(value, (portp->ioaddr + XP_DATA)); | |
3724 | } | |
3725 | ||
ca7ed0f2 | 3726 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
3727 | { |
3728 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); | |
3729 | if (inb(portp->ioaddr + XP_DATA) != value) { | |
3730 | outb(value, (portp->ioaddr + XP_DATA)); | |
014c2544 | 3731 | return 1; |
1da177e4 | 3732 | } |
014c2544 | 3733 | return 0; |
1da177e4 LT |
3734 | } |
3735 | ||
3736 | /*****************************************************************************/ | |
3737 | ||
3738 | /* | |
3739 | * Functions to get and set the sc26198 global registers. | |
3740 | */ | |
3741 | ||
ca7ed0f2 | 3742 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr) |
1da177e4 LT |
3743 | { |
3744 | outb(regnr, (portp->ioaddr + XP_ADDR)); | |
014c2544 | 3745 | return inb(portp->ioaddr + XP_DATA); |
1da177e4 LT |
3746 | } |
3747 | ||
3748 | #if 0 | |
ca7ed0f2 | 3749 | static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value) |
1da177e4 LT |
3750 | { |
3751 | outb(regnr, (portp->ioaddr + XP_ADDR)); | |
3752 | outb(value, (portp->ioaddr + XP_DATA)); | |
3753 | } | |
3754 | #endif | |
3755 | ||
3756 | /*****************************************************************************/ | |
3757 | ||
3758 | /* | |
3759 | * Inbitialize the UARTs in a panel. We don't care what sort of board | |
3760 | * these ports are on - since the port io registers are almost | |
3761 | * identical when dealing with ports. | |
3762 | */ | |
3763 | ||
ca7ed0f2 | 3764 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
1da177e4 LT |
3765 | { |
3766 | int chipmask, i; | |
3767 | int nrchips, ioaddr; | |
3768 | ||
a0564e14 | 3769 | pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
1da177e4 LT |
3770 | |
3771 | BRDENABLE(panelp->brdnr, panelp->pagenr); | |
3772 | ||
3773 | /* | |
3774 | * Check that each chip is present and started up OK. | |
3775 | */ | |
3776 | chipmask = 0; | |
3777 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; | |
3778 | if (brdp->brdtype == BRD_ECHPCI) | |
3779 | outb(panelp->pagenr, brdp->ioctrl); | |
3780 | ||
c62429d9 | 3781 | for (i = 0; i < nrchips; i++) { |
1da177e4 LT |
3782 | ioaddr = panelp->iobase + (i * 4); |
3783 | outb(SCCR, (ioaddr + XP_ADDR)); | |
3784 | outb(CR_RESETALL, (ioaddr + XP_DATA)); | |
3785 | outb(TSTR, (ioaddr + XP_ADDR)); | |
3786 | if (inb(ioaddr + XP_DATA) != 0) { | |
3787 | printk("STALLION: sc26198 not responding, " | |
3788 | "brd=%d panel=%d chip=%d\n", | |
3789 | panelp->brdnr, panelp->panelnr, i); | |
3790 | continue; | |
3791 | } | |
3792 | chipmask |= (0x1 << i); | |
3793 | outb(GCCR, (ioaddr + XP_ADDR)); | |
3794 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); | |
3795 | outb(WDTRCR, (ioaddr + XP_ADDR)); | |
3796 | outb(0xff, (ioaddr + XP_DATA)); | |
3797 | } | |
3798 | ||
3799 | BRDDISABLE(panelp->brdnr); | |
014c2544 | 3800 | return chipmask; |
1da177e4 LT |
3801 | } |
3802 | ||
3803 | /*****************************************************************************/ | |
3804 | ||
3805 | /* | |
3806 | * Initialize hardware specific port registers. | |
3807 | */ | |
3808 | ||
ca7ed0f2 | 3809 | static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
1da177e4 | 3810 | { |
a0564e14 JS |
3811 | pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
3812 | panelp, portp); | |
1da177e4 | 3813 | |
615e4a71 JS |
3814 | if ((brdp == NULL) || (panelp == NULL) || |
3815 | (portp == NULL)) | |
1da177e4 LT |
3816 | return; |
3817 | ||
3818 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); | |
3819 | portp->uartaddr = (portp->portnr & 0x07) << 4; | |
3820 | portp->pagenr = panelp->pagenr; | |
3821 | portp->hwid = 0x1; | |
3822 | ||
3823 | BRDENABLE(portp->brdnr, portp->pagenr); | |
3824 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); | |
3825 | BRDDISABLE(portp->brdnr); | |
3826 | } | |
3827 | ||
3828 | /*****************************************************************************/ | |
3829 | ||
3830 | /* | |
3831 | * Set up the sc26198 registers for a port based on the termios port | |
3832 | * settings. | |
3833 | */ | |
3834 | ||
606d099c | 3835 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp) |
1da177e4 | 3836 | { |
ca7ed0f2 | 3837 | struct stlbrd *brdp; |
1da177e4 LT |
3838 | unsigned long flags; |
3839 | unsigned int baudrate; | |
3840 | unsigned char mr0, mr1, mr2, clk; | |
3841 | unsigned char imron, imroff, iopr, ipr; | |
3842 | ||
3843 | mr0 = 0; | |
3844 | mr1 = 0; | |
3845 | mr2 = 0; | |
3846 | clk = 0; | |
3847 | iopr = 0; | |
3848 | imron = 0; | |
3849 | imroff = 0; | |
3850 | ||
3851 | brdp = stl_brds[portp->brdnr]; | |
615e4a71 | 3852 | if (brdp == NULL) |
1da177e4 LT |
3853 | return; |
3854 | ||
3855 | /* | |
3856 | * Set up the RX char ignore mask with those RX error types we | |
3857 | * can ignore. | |
3858 | */ | |
3859 | portp->rxignoremsk = 0; | |
3860 | if (tiosp->c_iflag & IGNPAR) | |
3861 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | | |
3862 | SR_RXOVERRUN); | |
3863 | if (tiosp->c_iflag & IGNBRK) | |
3864 | portp->rxignoremsk |= SR_RXBREAK; | |
3865 | ||
3866 | portp->rxmarkmsk = SR_RXOVERRUN; | |
3867 | if (tiosp->c_iflag & (INPCK | PARMRK)) | |
3868 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); | |
3869 | if (tiosp->c_iflag & BRKINT) | |
3870 | portp->rxmarkmsk |= SR_RXBREAK; | |
3871 | ||
3872 | /* | |
3873 | * Go through the char size, parity and stop bits and set all the | |
3874 | * option register appropriately. | |
3875 | */ | |
3876 | switch (tiosp->c_cflag & CSIZE) { | |
3877 | case CS5: | |
3878 | mr1 |= MR1_CS5; | |
3879 | break; | |
3880 | case CS6: | |
3881 | mr1 |= MR1_CS6; | |
3882 | break; | |
3883 | case CS7: | |
3884 | mr1 |= MR1_CS7; | |
3885 | break; | |
3886 | default: | |
3887 | mr1 |= MR1_CS8; | |
3888 | break; | |
3889 | } | |
3890 | ||
3891 | if (tiosp->c_cflag & CSTOPB) | |
3892 | mr2 |= MR2_STOP2; | |
3893 | else | |
3894 | mr2 |= MR2_STOP1; | |
3895 | ||
3896 | if (tiosp->c_cflag & PARENB) { | |
3897 | if (tiosp->c_cflag & PARODD) | |
3898 | mr1 |= (MR1_PARENB | MR1_PARODD); | |
3899 | else | |
3900 | mr1 |= (MR1_PARENB | MR1_PAREVEN); | |
c62429d9 | 3901 | } else |
1da177e4 | 3902 | mr1 |= MR1_PARNONE; |
1da177e4 LT |
3903 | |
3904 | mr1 |= MR1_ERRBLOCK; | |
3905 | ||
3906 | /* | |
3907 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing | |
3908 | * space for hardware flow control and the like. This should be set to | |
3909 | * VMIN. | |
3910 | */ | |
3911 | mr2 |= MR2_RXFIFOHALF; | |
3912 | ||
3913 | /* | |
3914 | * Calculate the baud rate timers. For now we will just assume that | |
3915 | * the input and output baud are the same. The sc26198 has a fixed | |
3916 | * baud rate table, so only discrete baud rates possible. | |
3917 | */ | |
3918 | baudrate = tiosp->c_cflag & CBAUD; | |
3919 | if (baudrate & CBAUDEX) { | |
3920 | baudrate &= ~CBAUDEX; | |
3921 | if ((baudrate < 1) || (baudrate > 4)) | |
3922 | tiosp->c_cflag &= ~CBAUDEX; | |
3923 | else | |
3924 | baudrate += 15; | |
3925 | } | |
3926 | baudrate = stl_baudrates[baudrate]; | |
3927 | if ((tiosp->c_cflag & CBAUD) == B38400) { | |
3928 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
3929 | baudrate = 57600; | |
3930 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
3931 | baudrate = 115200; | |
3932 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) | |
3933 | baudrate = 230400; | |
3934 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
3935 | baudrate = 460800; | |
3936 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) | |
3937 | baudrate = (portp->baud_base / portp->custom_divisor); | |
3938 | } | |
3939 | if (baudrate > STL_SC26198MAXBAUD) | |
3940 | baudrate = STL_SC26198MAXBAUD; | |
3941 | ||
c62429d9 JS |
3942 | if (baudrate > 0) |
3943 | for (clk = 0; clk < SC26198_NRBAUDS; clk++) | |
1da177e4 LT |
3944 | if (baudrate <= sc26198_baudtable[clk]) |
3945 | break; | |
1da177e4 LT |
3946 | |
3947 | /* | |
3948 | * Check what form of modem signaling is required and set it up. | |
3949 | */ | |
3950 | if (tiosp->c_cflag & CLOCAL) { | |
3951 | portp->flags &= ~ASYNC_CHECK_CD; | |
3952 | } else { | |
3953 | iopr |= IOPR_DCDCOS; | |
3954 | imron |= IR_IOPORT; | |
3955 | portp->flags |= ASYNC_CHECK_CD; | |
3956 | } | |
3957 | ||
3958 | /* | |
3959 | * Setup sc26198 enhanced modes if we can. In particular we want to | |
3960 | * handle as much of the flow control as possible automatically. As | |
3961 | * well as saving a few CPU cycles it will also greatly improve flow | |
3962 | * control reliability. | |
3963 | */ | |
3964 | if (tiosp->c_iflag & IXON) { | |
3965 | mr0 |= MR0_SWFTX | MR0_SWFT; | |
3966 | imron |= IR_XONXOFF; | |
c62429d9 | 3967 | } else |
1da177e4 | 3968 | imroff |= IR_XONXOFF; |
c62429d9 | 3969 | |
1da177e4 LT |
3970 | if (tiosp->c_iflag & IXOFF) |
3971 | mr0 |= MR0_SWFRX; | |
3972 | ||
3973 | if (tiosp->c_cflag & CRTSCTS) { | |
3974 | mr2 |= MR2_AUTOCTS; | |
3975 | mr1 |= MR1_AUTORTS; | |
3976 | } | |
3977 | ||
3978 | /* | |
3979 | * All sc26198 register values calculated so go through and set | |
3980 | * them all up. | |
3981 | */ | |
3982 | ||
a0564e14 | 3983 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
1da177e4 | 3984 | portp->portnr, portp->panelnr, portp->brdnr); |
a0564e14 JS |
3985 | pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
3986 | pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); | |
3987 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", | |
1da177e4 LT |
3988 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
3989 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); | |
1da177e4 | 3990 | |
b65b5b59 | 3991 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
3992 | BRDENABLE(portp->brdnr, portp->pagenr); |
3993 | stl_sc26198setreg(portp, IMR, 0); | |
3994 | stl_sc26198updatereg(portp, MR0, mr0); | |
3995 | stl_sc26198updatereg(portp, MR1, mr1); | |
3996 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); | |
3997 | stl_sc26198updatereg(portp, MR2, mr2); | |
3998 | stl_sc26198updatereg(portp, IOPIOR, | |
3999 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); | |
4000 | ||
4001 | if (baudrate > 0) { | |
4002 | stl_sc26198setreg(portp, TXCSR, clk); | |
4003 | stl_sc26198setreg(portp, RXCSR, clk); | |
4004 | } | |
4005 | ||
4006 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); | |
4007 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); | |
4008 | ||
4009 | ipr = stl_sc26198getreg(portp, IPR); | |
4010 | if (ipr & IPR_DCD) | |
4011 | portp->sigs &= ~TIOCM_CD; | |
4012 | else | |
4013 | portp->sigs |= TIOCM_CD; | |
4014 | ||
4015 | portp->imr = (portp->imr & ~imroff) | imron; | |
4016 | stl_sc26198setreg(portp, IMR, portp->imr); | |
4017 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4018 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4019 | } |
4020 | ||
4021 | /*****************************************************************************/ | |
4022 | ||
4023 | /* | |
4024 | * Set the state of the DTR and RTS signals. | |
4025 | */ | |
4026 | ||
ca7ed0f2 | 4027 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts) |
1da177e4 LT |
4028 | { |
4029 | unsigned char iopioron, iopioroff; | |
4030 | unsigned long flags; | |
4031 | ||
a0564e14 JS |
4032 | pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp, |
4033 | dtr, rts); | |
1da177e4 LT |
4034 | |
4035 | iopioron = 0; | |
4036 | iopioroff = 0; | |
4037 | if (dtr == 0) | |
4038 | iopioroff |= IPR_DTR; | |
4039 | else if (dtr > 0) | |
4040 | iopioron |= IPR_DTR; | |
4041 | if (rts == 0) | |
4042 | iopioroff |= IPR_RTS; | |
4043 | else if (rts > 0) | |
4044 | iopioron |= IPR_RTS; | |
4045 | ||
b65b5b59 | 4046 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4047 | BRDENABLE(portp->brdnr, portp->pagenr); |
4048 | stl_sc26198setreg(portp, IOPIOR, | |
4049 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); | |
4050 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4051 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4052 | } |
4053 | ||
4054 | /*****************************************************************************/ | |
4055 | ||
4056 | /* | |
4057 | * Return the state of the signals. | |
4058 | */ | |
4059 | ||
ca7ed0f2 | 4060 | static int stl_sc26198getsignals(struct stlport *portp) |
1da177e4 LT |
4061 | { |
4062 | unsigned char ipr; | |
4063 | unsigned long flags; | |
4064 | int sigs; | |
4065 | ||
a0564e14 | 4066 | pr_debug("stl_sc26198getsignals(portp=%p)\n", portp); |
1da177e4 | 4067 | |
b65b5b59 | 4068 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4069 | BRDENABLE(portp->brdnr, portp->pagenr); |
4070 | ipr = stl_sc26198getreg(portp, IPR); | |
4071 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4072 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4073 | |
4074 | sigs = 0; | |
4075 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; | |
4076 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; | |
4077 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; | |
4078 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; | |
4079 | sigs |= TIOCM_DSR; | |
014c2544 | 4080 | return sigs; |
1da177e4 LT |
4081 | } |
4082 | ||
4083 | /*****************************************************************************/ | |
4084 | ||
4085 | /* | |
4086 | * Enable/Disable the Transmitter and/or Receiver. | |
4087 | */ | |
4088 | ||
ca7ed0f2 | 4089 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
4090 | { |
4091 | unsigned char ccr; | |
4092 | unsigned long flags; | |
4093 | ||
a0564e14 | 4094 | pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx); |
1da177e4 LT |
4095 | |
4096 | ccr = portp->crenable; | |
4097 | if (tx == 0) | |
4098 | ccr &= ~CR_TXENABLE; | |
4099 | else if (tx > 0) | |
4100 | ccr |= CR_TXENABLE; | |
4101 | if (rx == 0) | |
4102 | ccr &= ~CR_RXENABLE; | |
4103 | else if (rx > 0) | |
4104 | ccr |= CR_RXENABLE; | |
4105 | ||
b65b5b59 | 4106 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4107 | BRDENABLE(portp->brdnr, portp->pagenr); |
4108 | stl_sc26198setreg(portp, SCCR, ccr); | |
4109 | BRDDISABLE(portp->brdnr); | |
4110 | portp->crenable = ccr; | |
b65b5b59 | 4111 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4112 | } |
4113 | ||
4114 | /*****************************************************************************/ | |
4115 | ||
4116 | /* | |
4117 | * Start/stop the Transmitter and/or Receiver. | |
4118 | */ | |
4119 | ||
ca7ed0f2 | 4120 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx) |
1da177e4 LT |
4121 | { |
4122 | unsigned char imr; | |
4123 | unsigned long flags; | |
4124 | ||
a0564e14 | 4125 | pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
1da177e4 LT |
4126 | |
4127 | imr = portp->imr; | |
4128 | if (tx == 0) | |
4129 | imr &= ~IR_TXRDY; | |
4130 | else if (tx == 1) | |
4131 | imr |= IR_TXRDY; | |
4132 | if (rx == 0) | |
4133 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); | |
4134 | else if (rx > 0) | |
4135 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; | |
4136 | ||
b65b5b59 | 4137 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4138 | BRDENABLE(portp->brdnr, portp->pagenr); |
4139 | stl_sc26198setreg(portp, IMR, imr); | |
4140 | BRDDISABLE(portp->brdnr); | |
4141 | portp->imr = imr; | |
4142 | if (tx > 0) | |
4143 | set_bit(ASYI_TXBUSY, &portp->istate); | |
b65b5b59 | 4144 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4145 | } |
4146 | ||
4147 | /*****************************************************************************/ | |
4148 | ||
4149 | /* | |
4150 | * Disable all interrupts from this port. | |
4151 | */ | |
4152 | ||
ca7ed0f2 | 4153 | static void stl_sc26198disableintrs(struct stlport *portp) |
1da177e4 LT |
4154 | { |
4155 | unsigned long flags; | |
4156 | ||
a0564e14 | 4157 | pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp); |
1da177e4 | 4158 | |
b65b5b59 | 4159 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4160 | BRDENABLE(portp->brdnr, portp->pagenr); |
4161 | portp->imr = 0; | |
4162 | stl_sc26198setreg(portp, IMR, 0); | |
4163 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4164 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4165 | } |
4166 | ||
4167 | /*****************************************************************************/ | |
4168 | ||
ca7ed0f2 | 4169 | static void stl_sc26198sendbreak(struct stlport *portp, int len) |
1da177e4 LT |
4170 | { |
4171 | unsigned long flags; | |
4172 | ||
a0564e14 | 4173 | pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len); |
1da177e4 | 4174 | |
b65b5b59 | 4175 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4176 | BRDENABLE(portp->brdnr, portp->pagenr); |
4177 | if (len == 1) { | |
4178 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); | |
4179 | portp->stats.txbreaks++; | |
c62429d9 | 4180 | } else |
1da177e4 | 4181 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); |
c62429d9 | 4182 | |
1da177e4 | 4183 | BRDDISABLE(portp->brdnr); |
b65b5b59 | 4184 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4185 | } |
4186 | ||
4187 | /*****************************************************************************/ | |
4188 | ||
4189 | /* | |
4190 | * Take flow control actions... | |
4191 | */ | |
4192 | ||
ca7ed0f2 | 4193 | static void stl_sc26198flowctrl(struct stlport *portp, int state) |
1da177e4 LT |
4194 | { |
4195 | struct tty_struct *tty; | |
4196 | unsigned long flags; | |
4197 | unsigned char mr0; | |
4198 | ||
a0564e14 | 4199 | pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 4200 | |
615e4a71 | 4201 | if (portp == NULL) |
1da177e4 LT |
4202 | return; |
4203 | tty = portp->tty; | |
615e4a71 | 4204 | if (tty == NULL) |
1da177e4 LT |
4205 | return; |
4206 | ||
b65b5b59 | 4207 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4208 | BRDENABLE(portp->brdnr, portp->pagenr); |
4209 | ||
4210 | if (state) { | |
4211 | if (tty->termios->c_iflag & IXOFF) { | |
4212 | mr0 = stl_sc26198getreg(portp, MR0); | |
4213 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4214 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); | |
4215 | mr0 |= MR0_SWFRX; | |
4216 | portp->stats.rxxon++; | |
4217 | stl_sc26198wait(portp); | |
4218 | stl_sc26198setreg(portp, MR0, mr0); | |
4219 | } | |
4220 | /* | |
4221 | * Question: should we return RTS to what it was before? It may | |
4222 | * have been set by an ioctl... Suppose not, since if you have | |
4223 | * hardware flow control set then it is pretty silly to go and | |
4224 | * set the RTS line by hand. | |
4225 | */ | |
4226 | if (tty->termios->c_cflag & CRTSCTS) { | |
4227 | stl_sc26198setreg(portp, MR1, | |
4228 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); | |
4229 | stl_sc26198setreg(portp, IOPIOR, | |
4230 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); | |
4231 | portp->stats.rxrtson++; | |
4232 | } | |
4233 | } else { | |
4234 | if (tty->termios->c_iflag & IXOFF) { | |
4235 | mr0 = stl_sc26198getreg(portp, MR0); | |
4236 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4237 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); | |
4238 | mr0 &= ~MR0_SWFRX; | |
4239 | portp->stats.rxxoff++; | |
4240 | stl_sc26198wait(portp); | |
4241 | stl_sc26198setreg(portp, MR0, mr0); | |
4242 | } | |
4243 | if (tty->termios->c_cflag & CRTSCTS) { | |
4244 | stl_sc26198setreg(portp, MR1, | |
4245 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); | |
4246 | stl_sc26198setreg(portp, IOPIOR, | |
4247 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); | |
4248 | portp->stats.rxrtsoff++; | |
4249 | } | |
4250 | } | |
4251 | ||
4252 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4253 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4254 | } |
4255 | ||
4256 | /*****************************************************************************/ | |
4257 | ||
4258 | /* | |
4259 | * Send a flow control character. | |
4260 | */ | |
4261 | ||
ca7ed0f2 | 4262 | static void stl_sc26198sendflow(struct stlport *portp, int state) |
1da177e4 LT |
4263 | { |
4264 | struct tty_struct *tty; | |
4265 | unsigned long flags; | |
4266 | unsigned char mr0; | |
4267 | ||
a0564e14 | 4268 | pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state); |
1da177e4 | 4269 | |
615e4a71 | 4270 | if (portp == NULL) |
1da177e4 LT |
4271 | return; |
4272 | tty = portp->tty; | |
615e4a71 | 4273 | if (tty == NULL) |
1da177e4 LT |
4274 | return; |
4275 | ||
b65b5b59 | 4276 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4277 | BRDENABLE(portp->brdnr, portp->pagenr); |
4278 | if (state) { | |
4279 | mr0 = stl_sc26198getreg(portp, MR0); | |
4280 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4281 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); | |
4282 | mr0 |= MR0_SWFRX; | |
4283 | portp->stats.rxxon++; | |
4284 | stl_sc26198wait(portp); | |
4285 | stl_sc26198setreg(portp, MR0, mr0); | |
4286 | } else { | |
4287 | mr0 = stl_sc26198getreg(portp, MR0); | |
4288 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4289 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); | |
4290 | mr0 &= ~MR0_SWFRX; | |
4291 | portp->stats.rxxoff++; | |
4292 | stl_sc26198wait(portp); | |
4293 | stl_sc26198setreg(portp, MR0, mr0); | |
4294 | } | |
4295 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4296 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4297 | } |
4298 | ||
4299 | /*****************************************************************************/ | |
4300 | ||
ca7ed0f2 | 4301 | static void stl_sc26198flush(struct stlport *portp) |
1da177e4 LT |
4302 | { |
4303 | unsigned long flags; | |
4304 | ||
a0564e14 | 4305 | pr_debug("stl_sc26198flush(portp=%p)\n", portp); |
1da177e4 | 4306 | |
615e4a71 | 4307 | if (portp == NULL) |
1da177e4 LT |
4308 | return; |
4309 | ||
b65b5b59 | 4310 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4311 | BRDENABLE(portp->brdnr, portp->pagenr); |
4312 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); | |
4313 | stl_sc26198setreg(portp, SCCR, portp->crenable); | |
4314 | BRDDISABLE(portp->brdnr); | |
4315 | portp->tx.tail = portp->tx.head; | |
b65b5b59 | 4316 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 LT |
4317 | } |
4318 | ||
4319 | /*****************************************************************************/ | |
4320 | ||
4321 | /* | |
4322 | * Return the current state of data flow on this port. This is only | |
4323 | * really interresting when determining if data has fully completed | |
4324 | * transmission or not... The sc26198 interrupt scheme cannot | |
4325 | * determine when all data has actually drained, so we need to | |
4326 | * check the port statusy register to be sure. | |
4327 | */ | |
4328 | ||
ca7ed0f2 | 4329 | static int stl_sc26198datastate(struct stlport *portp) |
1da177e4 LT |
4330 | { |
4331 | unsigned long flags; | |
4332 | unsigned char sr; | |
4333 | ||
a0564e14 | 4334 | pr_debug("stl_sc26198datastate(portp=%p)\n", portp); |
1da177e4 | 4335 | |
615e4a71 | 4336 | if (portp == NULL) |
014c2544 | 4337 | return 0; |
1da177e4 | 4338 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
014c2544 | 4339 | return 1; |
1da177e4 | 4340 | |
b65b5b59 | 4341 | spin_lock_irqsave(&brd_lock, flags); |
1da177e4 LT |
4342 | BRDENABLE(portp->brdnr, portp->pagenr); |
4343 | sr = stl_sc26198getreg(portp, SR); | |
4344 | BRDDISABLE(portp->brdnr); | |
b65b5b59 | 4345 | spin_unlock_irqrestore(&brd_lock, flags); |
1da177e4 | 4346 | |
014c2544 | 4347 | return (sr & SR_TXEMPTY) ? 0 : 1; |
1da177e4 LT |
4348 | } |
4349 | ||
4350 | /*****************************************************************************/ | |
4351 | ||
4352 | /* | |
4353 | * Delay for a small amount of time, to give the sc26198 a chance | |
4354 | * to process a command... | |
4355 | */ | |
4356 | ||
ca7ed0f2 | 4357 | static void stl_sc26198wait(struct stlport *portp) |
1da177e4 LT |
4358 | { |
4359 | int i; | |
4360 | ||
a0564e14 | 4361 | pr_debug("stl_sc26198wait(portp=%p)\n", portp); |
1da177e4 | 4362 | |
615e4a71 | 4363 | if (portp == NULL) |
1da177e4 LT |
4364 | return; |
4365 | ||
c62429d9 | 4366 | for (i = 0; i < 20; i++) |
1da177e4 LT |
4367 | stl_sc26198getglobreg(portp, TSTR); |
4368 | } | |
4369 | ||
4370 | /*****************************************************************************/ | |
4371 | ||
4372 | /* | |
4373 | * If we are TX flow controlled and in IXANY mode then we may | |
4374 | * need to unflow control here. We gotta do this because of the | |
4375 | * automatic flow control modes of the sc26198. | |
4376 | */ | |
4377 | ||
60be4810 | 4378 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty) |
1da177e4 LT |
4379 | { |
4380 | unsigned char mr0; | |
4381 | ||
4382 | mr0 = stl_sc26198getreg(portp, MR0); | |
4383 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); | |
4384 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); | |
4385 | stl_sc26198wait(portp); | |
4386 | stl_sc26198setreg(portp, MR0, mr0); | |
4387 | clear_bit(ASYI_TXFLOWED, &portp->istate); | |
4388 | } | |
4389 | ||
4390 | /*****************************************************************************/ | |
4391 | ||
4392 | /* | |
4393 | * Interrupt service routine for sc26198 panels. | |
4394 | */ | |
4395 | ||
ca7ed0f2 | 4396 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase) |
1da177e4 | 4397 | { |
ca7ed0f2 | 4398 | struct stlport *portp; |
1da177e4 LT |
4399 | unsigned int iack; |
4400 | ||
b65b5b59 AC |
4401 | spin_lock(&brd_lock); |
4402 | ||
1da177e4 LT |
4403 | /* |
4404 | * Work around bug in sc26198 chip... Cannot have A6 address | |
4405 | * line of UART high, else iack will be returned as 0. | |
4406 | */ | |
4407 | outb(0, (iobase + 1)); | |
4408 | ||
4409 | iack = inb(iobase + XP_IACK); | |
4410 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; | |
4411 | ||
4412 | if (iack & IVR_RXDATA) | |
4413 | stl_sc26198rxisr(portp, iack); | |
4414 | else if (iack & IVR_TXDATA) | |
4415 | stl_sc26198txisr(portp); | |
4416 | else | |
4417 | stl_sc26198otherisr(portp, iack); | |
b65b5b59 AC |
4418 | |
4419 | spin_unlock(&brd_lock); | |
1da177e4 LT |
4420 | } |
4421 | ||
4422 | /*****************************************************************************/ | |
4423 | ||
4424 | /* | |
4425 | * Transmit interrupt handler. This has gotta be fast! Handling TX | |
4426 | * chars is pretty simple, stuff as many as possible from the TX buffer | |
4427 | * into the sc26198 FIFO. | |
4428 | * In practice it is possible that interrupts are enabled but that the | |
4429 | * port has been hung up. Need to handle not having any TX buffer here, | |
4430 | * this is done by using the side effect that head and tail will also | |
4431 | * be NULL if the buffer has been freed. | |
4432 | */ | |
4433 | ||
ca7ed0f2 | 4434 | static void stl_sc26198txisr(struct stlport *portp) |
1da177e4 LT |
4435 | { |
4436 | unsigned int ioaddr; | |
4437 | unsigned char mr0; | |
4438 | int len, stlen; | |
4439 | char *head, *tail; | |
4440 | ||
a0564e14 | 4441 | pr_debug("stl_sc26198txisr(portp=%p)\n", portp); |
1da177e4 LT |
4442 | |
4443 | ioaddr = portp->ioaddr; | |
4444 | head = portp->tx.head; | |
4445 | tail = portp->tx.tail; | |
4446 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); | |
4447 | if ((len == 0) || ((len < STL_TXBUFLOW) && | |
4448 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { | |
4449 | set_bit(ASYI_TXLOW, &portp->istate); | |
4450 | schedule_work(&portp->tqueue); | |
4451 | } | |
4452 | ||
4453 | if (len == 0) { | |
4454 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); | |
4455 | mr0 = inb(ioaddr + XP_DATA); | |
4456 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { | |
4457 | portp->imr &= ~IR_TXRDY; | |
4458 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); | |
4459 | outb(portp->imr, (ioaddr + XP_DATA)); | |
4460 | clear_bit(ASYI_TXBUSY, &portp->istate); | |
4461 | } else { | |
4462 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); | |
4463 | outb(mr0, (ioaddr + XP_DATA)); | |
4464 | } | |
4465 | } else { | |
843b568c | 4466 | len = min(len, SC26198_TXFIFOSIZE); |
1da177e4 | 4467 | portp->stats.txtotal += len; |
843b568c | 4468 | stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
1da177e4 LT |
4469 | outb(GTXFIFO, (ioaddr + XP_ADDR)); |
4470 | outsb((ioaddr + XP_DATA), tail, stlen); | |
4471 | len -= stlen; | |
4472 | tail += stlen; | |
4473 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) | |
4474 | tail = portp->tx.buf; | |
4475 | if (len > 0) { | |
4476 | outsb((ioaddr + XP_DATA), tail, len); | |
4477 | tail += len; | |
4478 | } | |
4479 | portp->tx.tail = tail; | |
4480 | } | |
4481 | } | |
4482 | ||
4483 | /*****************************************************************************/ | |
4484 | ||
4485 | /* | |
4486 | * Receive character interrupt handler. Determine if we have good chars | |
4487 | * or bad chars and then process appropriately. Good chars are easy | |
4488 | * just shove the lot into the RX buffer and set all status byte to 0. | |
4489 | * If a bad RX char then process as required. This routine needs to be | |
4490 | * fast! In practice it is possible that we get an interrupt on a port | |
4491 | * that is closed. This can happen on hangups - since they completely | |
4492 | * shutdown a port not in user context. Need to handle this case. | |
4493 | */ | |
4494 | ||
ca7ed0f2 | 4495 | static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack) |
1da177e4 LT |
4496 | { |
4497 | struct tty_struct *tty; | |
4498 | unsigned int len, buflen, ioaddr; | |
4499 | ||
a0564e14 | 4500 | pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack); |
1da177e4 LT |
4501 | |
4502 | tty = portp->tty; | |
4503 | ioaddr = portp->ioaddr; | |
4504 | outb(GIBCR, (ioaddr + XP_ADDR)); | |
4505 | len = inb(ioaddr + XP_DATA) + 1; | |
4506 | ||
4507 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { | |
33f0f88f | 4508 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
843b568c | 4509 | len = min(len, sizeof(stl_unwanted)); |
1da177e4 LT |
4510 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
4511 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); | |
4512 | portp->stats.rxlost += len; | |
4513 | portp->stats.rxtotal += len; | |
4514 | } else { | |
843b568c | 4515 | len = min(len, buflen); |
1da177e4 | 4516 | if (len > 0) { |
33f0f88f | 4517 | unsigned char *ptr; |
1da177e4 | 4518 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
33f0f88f AC |
4519 | tty_prepare_flip_string(tty, &ptr, len); |
4520 | insb((ioaddr + XP_DATA), ptr, len); | |
1da177e4 LT |
4521 | tty_schedule_flip(tty); |
4522 | portp->stats.rxtotal += len; | |
4523 | } | |
4524 | } | |
4525 | } else { | |
4526 | stl_sc26198rxbadchars(portp); | |
4527 | } | |
4528 | ||
4529 | /* | |
4530 | * If we are TX flow controlled and in IXANY mode then we may need | |
4531 | * to unflow control here. We gotta do this because of the automatic | |
4532 | * flow control modes of the sc26198. | |
4533 | */ | |
4534 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { | |
615e4a71 JS |
4535 | if ((tty != NULL) && |
4536 | (tty->termios != NULL) && | |
1da177e4 LT |
4537 | (tty->termios->c_iflag & IXANY)) { |
4538 | stl_sc26198txunflow(portp, tty); | |
4539 | } | |
4540 | } | |
4541 | } | |
4542 | ||
4543 | /*****************************************************************************/ | |
4544 | ||
4545 | /* | |
4546 | * Process an RX bad character. | |
4547 | */ | |
4548 | ||
60be4810 | 4549 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch) |
1da177e4 LT |
4550 | { |
4551 | struct tty_struct *tty; | |
4552 | unsigned int ioaddr; | |
4553 | ||
4554 | tty = portp->tty; | |
4555 | ioaddr = portp->ioaddr; | |
4556 | ||
4557 | if (status & SR_RXPARITY) | |
4558 | portp->stats.rxparity++; | |
4559 | if (status & SR_RXFRAMING) | |
4560 | portp->stats.rxframing++; | |
4561 | if (status & SR_RXOVERRUN) | |
4562 | portp->stats.rxoverrun++; | |
4563 | if (status & SR_RXBREAK) | |
4564 | portp->stats.rxbreaks++; | |
4565 | ||
615e4a71 | 4566 | if ((tty != NULL) && |
1da177e4 LT |
4567 | ((portp->rxignoremsk & status) == 0)) { |
4568 | if (portp->rxmarkmsk & status) { | |
4569 | if (status & SR_RXBREAK) { | |
4570 | status = TTY_BREAK; | |
4571 | if (portp->flags & ASYNC_SAK) { | |
4572 | do_SAK(tty); | |
4573 | BRDENABLE(portp->brdnr, portp->pagenr); | |
4574 | } | |
c62429d9 | 4575 | } else if (status & SR_RXPARITY) |
1da177e4 | 4576 | status = TTY_PARITY; |
c62429d9 | 4577 | else if (status & SR_RXFRAMING) |
1da177e4 | 4578 | status = TTY_FRAME; |
c62429d9 | 4579 | else if(status & SR_RXOVERRUN) |
1da177e4 | 4580 | status = TTY_OVERRUN; |
c62429d9 | 4581 | else |
1da177e4 | 4582 | status = 0; |
c62429d9 | 4583 | } else |
1da177e4 | 4584 | status = 0; |
1da177e4 | 4585 | |
33f0f88f AC |
4586 | tty_insert_flip_char(tty, ch, status); |
4587 | tty_schedule_flip(tty); | |
1da177e4 LT |
4588 | |
4589 | if (status == 0) | |
4590 | portp->stats.rxtotal++; | |
4591 | } | |
4592 | } | |
4593 | ||
4594 | /*****************************************************************************/ | |
4595 | ||
4596 | /* | |
4597 | * Process all characters in the RX FIFO of the UART. Check all char | |
4598 | * status bytes as well, and process as required. We need to check | |
4599 | * all bytes in the FIFO, in case some more enter the FIFO while we | |
4600 | * are here. To get the exact character error type we need to switch | |
4601 | * into CHAR error mode (that is why we need to make sure we empty | |
4602 | * the FIFO). | |
4603 | */ | |
4604 | ||
ca7ed0f2 | 4605 | static void stl_sc26198rxbadchars(struct stlport *portp) |
1da177e4 LT |
4606 | { |
4607 | unsigned char status, mr1; | |
4608 | char ch; | |
4609 | ||
4610 | /* | |
4611 | * To get the precise error type for each character we must switch | |
4612 | * back into CHAR error mode. | |
4613 | */ | |
4614 | mr1 = stl_sc26198getreg(portp, MR1); | |
4615 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); | |
4616 | ||
4617 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { | |
4618 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); | |
4619 | ch = stl_sc26198getreg(portp, RXFIFO); | |
4620 | stl_sc26198rxbadch(portp, status, ch); | |
4621 | } | |
4622 | ||
4623 | /* | |
4624 | * To get correct interrupt class we must switch back into BLOCK | |
4625 | * error mode. | |
4626 | */ | |
4627 | stl_sc26198setreg(portp, MR1, mr1); | |
4628 | } | |
4629 | ||
4630 | /*****************************************************************************/ | |
4631 | ||
4632 | /* | |
4633 | * Other interrupt handler. This includes modem signals, flow | |
4634 | * control actions, etc. Most stuff is left to off-level interrupt | |
4635 | * processing time. | |
4636 | */ | |
4637 | ||
ca7ed0f2 | 4638 | static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack) |
1da177e4 LT |
4639 | { |
4640 | unsigned char cir, ipr, xisr; | |
4641 | ||
a0564e14 | 4642 | pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack); |
1da177e4 LT |
4643 | |
4644 | cir = stl_sc26198getglobreg(portp, CIR); | |
4645 | ||
4646 | switch (cir & CIR_SUBTYPEMASK) { | |
4647 | case CIR_SUBCOS: | |
4648 | ipr = stl_sc26198getreg(portp, IPR); | |
4649 | if (ipr & IPR_DCDCHANGE) { | |
4650 | set_bit(ASYI_DCDCHANGE, &portp->istate); | |
4651 | schedule_work(&portp->tqueue); | |
4652 | portp->stats.modem++; | |
4653 | } | |
4654 | break; | |
4655 | case CIR_SUBXONXOFF: | |
4656 | xisr = stl_sc26198getreg(portp, XISR); | |
4657 | if (xisr & XISR_RXXONGOT) { | |
4658 | set_bit(ASYI_TXFLOWED, &portp->istate); | |
4659 | portp->stats.txxoff++; | |
4660 | } | |
4661 | if (xisr & XISR_RXXOFFGOT) { | |
4662 | clear_bit(ASYI_TXFLOWED, &portp->istate); | |
4663 | portp->stats.txxon++; | |
4664 | } | |
4665 | break; | |
4666 | case CIR_SUBBREAK: | |
4667 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); | |
4668 | stl_sc26198rxbadchars(portp); | |
4669 | break; | |
4670 | default: | |
4671 | break; | |
4672 | } | |
4673 | } | |
4674 | ||
fc06b5cf JS |
4675 | static void stl_free_isabrds(void) |
4676 | { | |
4677 | struct stlbrd *brdp; | |
4678 | unsigned int i; | |
4679 | ||
4680 | for (i = 0; i < stl_nrbrds; i++) { | |
4681 | if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED)) | |
4682 | continue; | |
4683 | ||
4684 | free_irq(brdp->irq, brdp); | |
4685 | ||
4686 | stl_cleanup_panels(brdp); | |
4687 | ||
4688 | release_region(brdp->ioaddr1, brdp->iosize1); | |
4689 | if (brdp->iosize2 > 0) | |
4690 | release_region(brdp->ioaddr2, brdp->iosize2); | |
4691 | ||
4692 | kfree(brdp); | |
4693 | stl_brds[i] = NULL; | |
4694 | } | |
4695 | } | |
4696 | ||
23b85a15 JS |
4697 | /* |
4698 | * Loadable module initialization stuff. | |
4699 | */ | |
4700 | static int __init stallion_module_init(void) | |
4701 | { | |
843b568c JS |
4702 | struct stlbrd *brdp; |
4703 | struct stlconf conf; | |
aeaccfe4 | 4704 | unsigned int i, j; |
fc06b5cf | 4705 | int retval; |
23b85a15 JS |
4706 | |
4707 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); | |
4708 | ||
4709 | spin_lock_init(&stallion_lock); | |
4710 | spin_lock_init(&brd_lock); | |
4711 | ||
e415109f JS |
4712 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
4713 | if (!stl_serial) { | |
4714 | retval = -ENOMEM; | |
4715 | goto err; | |
4716 | } | |
4717 | ||
4718 | stl_serial->owner = THIS_MODULE; | |
4719 | stl_serial->driver_name = stl_drvname; | |
4720 | stl_serial->name = "ttyE"; | |
4721 | stl_serial->major = STL_SERIALMAJOR; | |
4722 | stl_serial->minor_start = 0; | |
4723 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; | |
4724 | stl_serial->subtype = SERIAL_TYPE_NORMAL; | |
4725 | stl_serial->init_termios = stl_deftermios; | |
4726 | stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; | |
4727 | tty_set_operations(stl_serial, &stl_ops); | |
4728 | ||
4729 | retval = tty_register_driver(stl_serial); | |
4730 | if (retval) { | |
4731 | printk("STALLION: failed to register serial driver\n"); | |
4732 | goto err_frtty; | |
4733 | } | |
4734 | ||
843b568c JS |
4735 | /* |
4736 | * Find any dynamically supported boards. That is via module load | |
4737 | * line options. | |
4738 | */ | |
4739 | for (i = stl_nrbrds; i < stl_nargs; i++) { | |
4740 | memset(&conf, 0, sizeof(conf)); | |
4741 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) | |
4742 | continue; | |
4743 | if ((brdp = stl_allocbrd()) == NULL) | |
4744 | continue; | |
4745 | brdp->brdnr = i; | |
4746 | brdp->brdtype = conf.brdtype; | |
4747 | brdp->ioaddr1 = conf.ioaddr1; | |
4748 | brdp->ioaddr2 = conf.ioaddr2; | |
4749 | brdp->irq = conf.irq; | |
4750 | brdp->irqtype = conf.irqtype; | |
b08b5ad9 IK |
4751 | stl_brds[brdp->brdnr] = brdp; |
4752 | if (stl_brdinit(brdp)) { | |
4753 | stl_brds[brdp->brdnr] = NULL; | |
843b568c | 4754 | kfree(brdp); |
b08b5ad9 | 4755 | } else { |
aeaccfe4 JS |
4756 | for (j = 0; j < brdp->nrports; j++) |
4757 | tty_register_device(stl_serial, | |
4758 | brdp->brdnr * STL_MAXPORTS + j, NULL); | |
843b568c | 4759 | stl_nrbrds = i + 1; |
79cfe7ab | 4760 | } |
843b568c | 4761 | } |
23b85a15 | 4762 | |
79cfe7ab | 4763 | /* this has to be _after_ isa finding because of locking */ |
b1b84fe0 | 4764 | retval = pci_register_driver(&stl_pcidriver); |
e415109f JS |
4765 | if (retval && stl_nrbrds == 0) { |
4766 | printk(KERN_ERR "STALLION: can't register pci driver\n"); | |
4767 | goto err_unrtty; | |
fc06b5cf | 4768 | } |
23b85a15 JS |
4769 | |
4770 | /* | |
4771 | * Set up a character driver for per board stuff. This is mainly used | |
4772 | * to do stats ioctls on the ports. | |
4773 | */ | |
4774 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) | |
4775 | printk("STALLION: failed to register serial board device\n"); | |
4776 | ||
4777 | stallion_class = class_create(THIS_MODULE, "staliomem"); | |
e415109f JS |
4778 | if (IS_ERR(stallion_class)) |
4779 | printk("STALLION: failed to create class\n"); | |
23b85a15 JS |
4780 | for (i = 0; i < 4; i++) |
4781 | class_device_create(stallion_class, NULL, | |
4782 | MKDEV(STL_SIOMEMMAJOR, i), NULL, | |
4783 | "staliomem%d", i); | |
4784 | ||
23b85a15 | 4785 | return 0; |
e415109f JS |
4786 | err_unrtty: |
4787 | tty_unregister_driver(stl_serial); | |
4788 | err_frtty: | |
fc06b5cf | 4789 | put_tty_driver(stl_serial); |
b1b84fe0 JS |
4790 | err: |
4791 | return retval; | |
23b85a15 JS |
4792 | } |
4793 | ||
4794 | static void __exit stallion_module_exit(void) | |
4795 | { | |
aeaccfe4 JS |
4796 | struct stlbrd *brdp; |
4797 | unsigned int i, j; | |
23b85a15 JS |
4798 | |
4799 | pr_debug("cleanup_module()\n"); | |
4800 | ||
4801 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, | |
4802 | stl_drvversion); | |
4803 | ||
4804 | /* | |
4805 | * Free up all allocated resources used by the ports. This includes | |
4806 | * memory and interrupts. As part of this process we will also do | |
4807 | * a hangup on every open port - to try to flush out any processes | |
4808 | * hanging onto ports. | |
4809 | */ | |
aeaccfe4 JS |
4810 | for (i = 0; i < stl_nrbrds; i++) { |
4811 | if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED)) | |
4812 | continue; | |
4813 | for (j = 0; j < brdp->nrports; j++) | |
4814 | tty_unregister_device(stl_serial, | |
4815 | brdp->brdnr * STL_MAXPORTS + j); | |
4816 | } | |
fc06b5cf | 4817 | |
23b85a15 JS |
4818 | for (i = 0; i < 4; i++) |
4819 | class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); | |
68fc4fab | 4820 | unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"); |
23b85a15 JS |
4821 | class_destroy(stallion_class); |
4822 | ||
b1b84fe0 JS |
4823 | pci_unregister_driver(&stl_pcidriver); |
4824 | ||
fc06b5cf | 4825 | stl_free_isabrds(); |
e415109f JS |
4826 | |
4827 | tty_unregister_driver(stl_serial); | |
4828 | put_tty_driver(stl_serial); | |
23b85a15 JS |
4829 | } |
4830 | ||
4831 | module_init(stallion_module_init); | |
4832 | module_exit(stallion_module_exit); | |
4833 | ||
4834 | MODULE_AUTHOR("Greg Ungerer"); | |
4835 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); | |
4836 | MODULE_LICENSE("GPL"); |