Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/serial167.c | |
3 | * | |
4 | * Driver for MVME166/7 board serial ports, which are via a CD2401. | |
5 | * Based very much on cyclades.c. | |
6 | * | |
7 | * MVME166/7 work by Richard Hirst [richard@sleepie.demon.co.uk] | |
8 | * | |
9 | * ============================================================== | |
10 | * | |
11 | * static char rcsid[] = | |
12 | * "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $"; | |
13 | * | |
14 | * linux/kernel/cyclades.c | |
15 | * | |
16 | * Maintained by Marcio Saito (cyclades@netcom.com) and | |
17 | * Randolph Bentson (bentson@grieg.seaslug.org) | |
18 | * | |
19 | * Much of the design and some of the code came from serial.c | |
20 | * which was copyright (C) 1991, 1992 Linus Torvalds. It was | |
21 | * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, | |
22 | * and then fixed as suggested by Michael K. Johnson 12/12/92. | |
23 | * | |
24 | * This version does not support shared irq's. | |
25 | * | |
26 | * $Log: cyclades.c,v $ | |
27 | * Revision 1.36.1.4 1995/03/29 06:14:14 bentson | |
28 | * disambiguate between Cyclom-16Y and Cyclom-32Ye; | |
29 | * | |
30 | * Changes: | |
31 | * | |
32 | * 200 lines of changes record removed - RGH 11-10-95, starting work on | |
33 | * converting this to drive serial ports on mvme166 (cd2401). | |
34 | * | |
35 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/25 | |
36 | * - get rid of verify_area | |
37 | * - use get_user to access memory from userspace in set_threshold, | |
38 | * set_default_threshold and set_timeout | |
39 | * - don't use the panic function in serial167_init | |
40 | * - do resource release on failure on serial167_init | |
41 | * - include missing restore_flags in mvme167_serial_console_setup | |
42 | * | |
43 | * Kars de Jong <jongk@linux-m68k.org> - 2004/09/06 | |
44 | * - replace bottom half handler with task queue handler | |
45 | */ | |
46 | ||
1da177e4 LT |
47 | #include <linux/errno.h> |
48 | #include <linux/signal.h> | |
49 | #include <linux/sched.h> | |
50 | #include <linux/timer.h> | |
51 | #include <linux/tty.h> | |
52 | #include <linux/interrupt.h> | |
53 | #include <linux/serial.h> | |
54 | #include <linux/serialP.h> | |
55 | #include <linux/string.h> | |
56 | #include <linux/fcntl.h> | |
57 | #include <linux/ptrace.h> | |
58 | #include <linux/serial167.h> | |
59 | #include <linux/delay.h> | |
60 | #include <linux/major.h> | |
61 | #include <linux/mm.h> | |
62 | #include <linux/console.h> | |
63 | #include <linux/module.h> | |
64 | #include <linux/bitops.h> | |
81e859ac | 65 | #include <linux/tty_flip.h> |
1da177e4 LT |
66 | |
67 | #include <asm/system.h> | |
68 | #include <asm/io.h> | |
69 | #include <asm/mvme16xhw.h> | |
70 | #include <asm/bootinfo.h> | |
71 | #include <asm/setup.h> | |
72 | ||
73 | #include <linux/types.h> | |
74 | #include <linux/kernel.h> | |
75 | ||
76 | #include <asm/uaccess.h> | |
77 | #include <linux/init.h> | |
78 | ||
79 | #define SERIAL_PARANOIA_CHECK | |
80 | #undef SERIAL_DEBUG_OPEN | |
81 | #undef SERIAL_DEBUG_THROTTLE | |
82 | #undef SERIAL_DEBUG_OTHER | |
83 | #undef SERIAL_DEBUG_IO | |
84 | #undef SERIAL_DEBUG_COUNT | |
85 | #undef SERIAL_DEBUG_DTR | |
86 | #undef CYCLOM_16Y_HACK | |
87 | #define CYCLOM_ENABLE_MONITORING | |
88 | ||
89 | #define WAKEUP_CHARS 256 | |
90 | ||
91 | #define STD_COM_FLAGS (0) | |
92 | ||
93 | #define SERIAL_TYPE_NORMAL 1 | |
94 | ||
95 | static struct tty_driver *cy_serial_driver; | |
96 | extern int serial_console; | |
97 | static struct cyclades_port *serial_console_info = NULL; | |
98 | static unsigned int serial_console_cflag = 0; | |
99 | u_char initial_console_speed; | |
100 | ||
101 | /* Base address of cd2401 chip on mvme166/7 */ | |
102 | ||
103 | #define BASE_ADDR (0xfff45000) | |
104 | #define pcc2chip ((volatile u_char *)0xfff42000) | |
105 | #define PccSCCMICR 0x1d | |
106 | #define PccSCCTICR 0x1e | |
107 | #define PccSCCRICR 0x1f | |
108 | #define PccTPIACKR 0x25 | |
109 | #define PccRPIACKR 0x27 | |
110 | #define PccIMLR 0x3f | |
111 | ||
112 | /* This is the per-port data structure */ | |
113 | struct cyclades_port cy_port[] = { | |
114 | /* CARD# */ | |
115 | {-1 }, /* ttyS0 */ | |
116 | {-1 }, /* ttyS1 */ | |
117 | {-1 }, /* ttyS2 */ | |
118 | {-1 }, /* ttyS3 */ | |
119 | }; | |
fe971071 | 120 | #define NR_PORTS ARRAY_SIZE(cy_port) |
1da177e4 | 121 | |
1da177e4 LT |
122 | /* |
123 | * This is used to look up the divisor speeds and the timeouts | |
124 | * We're normally limited to 15 distinct baud rates. The extra | |
125 | * are accessed via settings in info->flags. | |
126 | * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, | |
127 | * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, | |
128 | * HI VHI | |
129 | */ | |
130 | static int baud_table[] = { | |
131 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, | |
132 | 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000, | |
133 | 0}; | |
134 | ||
135 | #if 0 | |
136 | static char baud_co[] = { /* 25 MHz clock option table */ | |
137 | /* value => 00 01 02 03 04 */ | |
138 | /* divide by 8 32 128 512 2048 */ | |
139 | 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, | |
140 | 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
141 | ||
142 | static char baud_bpr[] = { /* 25 MHz baud rate period table */ | |
143 | 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, | |
144 | 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15}; | |
145 | #endif | |
146 | ||
147 | /* I think 166 brd clocks 2401 at 20MHz.... */ | |
148 | ||
149 | /* These values are written directly to tcor, and >> 5 for writing to rcor */ | |
150 | static u_char baud_co[] = { /* 20 MHz clock option table */ | |
151 | 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40, | |
152 | 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
153 | ||
154 | /* These values written directly to tbpr/rbpr */ | |
155 | static u_char baud_bpr[] = { /* 20 MHz baud rate period table */ | |
156 | 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81, | |
157 | 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10}; | |
158 | ||
159 | static u_char baud_cor4[] = { /* receive threshold */ | |
160 | 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, | |
161 | 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07}; | |
162 | ||
163 | ||
164 | ||
165 | static void shutdown(struct cyclades_port *); | |
166 | static int startup (struct cyclades_port *); | |
167 | static void cy_throttle(struct tty_struct *); | |
168 | static void cy_unthrottle(struct tty_struct *); | |
169 | static void config_setup(struct cyclades_port *); | |
170 | extern void console_print(const char *); | |
171 | #ifdef CYCLOM_SHOW_STATUS | |
172 | static void show_status(int); | |
173 | #endif | |
174 | ||
175 | #ifdef CONFIG_REMOTE_DEBUG | |
176 | static void debug_setup(void); | |
177 | void queueDebugChar (int c); | |
178 | int getDebugChar(void); | |
179 | ||
180 | #define DEBUG_PORT 1 | |
181 | #define DEBUG_LEN 256 | |
182 | ||
183 | typedef struct { | |
184 | int in; | |
185 | int out; | |
186 | unsigned char buf[DEBUG_LEN]; | |
187 | } debugq; | |
188 | ||
189 | debugq debugiq; | |
190 | #endif | |
191 | ||
192 | /* | |
193 | * I have my own version of udelay(), as it is needed when initialising | |
194 | * the chip, before the delay loop has been calibrated. Should probably | |
195 | * reference one of the vmechip2 or pccchip2 counter for an accurate | |
196 | * delay, but this wild guess will do for now. | |
197 | */ | |
198 | ||
199 | void my_udelay (long us) | |
200 | { | |
201 | u_char x; | |
202 | volatile u_char *p = &x; | |
203 | int i; | |
204 | ||
205 | while (us--) | |
206 | for (i = 100; i; i--) | |
207 | x |= *p; | |
208 | } | |
209 | ||
210 | static inline int | |
211 | serial_paranoia_check(struct cyclades_port *info, char *name, | |
212 | const char *routine) | |
213 | { | |
214 | #ifdef SERIAL_PARANOIA_CHECK | |
215 | static const char *badmagic = | |
216 | "Warning: bad magic number for serial struct (%s) in %s\n"; | |
217 | static const char *badinfo = | |
218 | "Warning: null cyclades_port for (%s) in %s\n"; | |
219 | static const char *badrange = | |
220 | "Warning: cyclades_port out of range for (%s) in %s\n"; | |
221 | ||
222 | if (!info) { | |
223 | printk(badinfo, name, routine); | |
224 | return 1; | |
225 | } | |
226 | ||
227 | if( (long)info < (long)(&cy_port[0]) | |
228 | || (long)(&cy_port[NR_PORTS]) < (long)info ){ | |
229 | printk(badrange, name, routine); | |
230 | return 1; | |
231 | } | |
232 | ||
233 | if (info->magic != CYCLADES_MAGIC) { | |
234 | printk(badmagic, name, routine); | |
235 | return 1; | |
236 | } | |
237 | #endif | |
238 | return 0; | |
239 | } /* serial_paranoia_check */ | |
240 | ||
241 | #if 0 | |
242 | /* The following diagnostic routines allow the driver to spew | |
243 | information on the screen, even (especially!) during interrupts. | |
244 | */ | |
245 | void | |
246 | SP(char *data){ | |
247 | unsigned long flags; | |
248 | local_irq_save(flags); | |
249 | console_print(data); | |
250 | local_irq_restore(flags); | |
251 | } | |
252 | char scrn[2]; | |
253 | void | |
254 | CP(char data){ | |
255 | unsigned long flags; | |
256 | local_irq_save(flags); | |
257 | scrn[0] = data; | |
258 | console_print(scrn); | |
259 | local_irq_restore(flags); | |
260 | }/* CP */ | |
261 | ||
262 | void CP1(int data) { (data<10)? CP(data+'0'): CP(data+'A'-10); }/* CP1 */ | |
263 | void CP2(int data) { CP1((data>>4) & 0x0f); CP1( data & 0x0f); }/* CP2 */ | |
264 | void CP4(int data) { CP2((data>>8) & 0xff); CP2(data & 0xff); }/* CP4 */ | |
265 | void CP8(long data) { CP4((data>>16) & 0xffff); CP4(data & 0xffff); }/* CP8 */ | |
266 | #endif | |
267 | ||
268 | /* This routine waits up to 1000 micro-seconds for the previous | |
269 | command to the Cirrus chip to complete and then issues the | |
270 | new command. An error is returned if the previous command | |
271 | didn't finish within the time limit. | |
272 | */ | |
273 | u_short | |
274 | write_cy_cmd(volatile u_char *base_addr, u_char cmd) | |
275 | { | |
276 | unsigned long flags; | |
277 | volatile int i; | |
278 | ||
279 | local_irq_save(flags); | |
280 | /* Check to see that the previous command has completed */ | |
281 | for(i = 0 ; i < 100 ; i++){ | |
282 | if (base_addr[CyCCR] == 0){ | |
283 | break; | |
284 | } | |
285 | my_udelay(10L); | |
286 | } | |
287 | /* if the CCR never cleared, the previous command | |
288 | didn't finish within the "reasonable time" */ | |
289 | if ( i == 10 ) { | |
290 | local_irq_restore(flags); | |
291 | return (-1); | |
292 | } | |
293 | ||
294 | /* Issue the new command */ | |
295 | base_addr[CyCCR] = cmd; | |
296 | local_irq_restore(flags); | |
297 | return(0); | |
298 | } /* write_cy_cmd */ | |
299 | ||
300 | ||
301 | /* cy_start and cy_stop provide software output flow control as a | |
302 | function of XON/XOFF, software CTS, and other such stuff. */ | |
303 | ||
304 | static void | |
305 | cy_stop(struct tty_struct *tty) | |
306 | { | |
307 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
308 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
309 | int channel; | |
310 | unsigned long flags; | |
311 | ||
312 | #ifdef SERIAL_DEBUG_OTHER | |
313 | printk("cy_stop %s\n", tty->name); /* */ | |
314 | #endif | |
315 | ||
316 | if (serial_paranoia_check(info, tty->name, "cy_stop")) | |
317 | return; | |
318 | ||
319 | channel = info->line; | |
320 | ||
321 | local_irq_save(flags); | |
322 | base_addr[CyCAR] = (u_char)(channel); /* index channel */ | |
323 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
324 | local_irq_restore(flags); | |
325 | ||
326 | return; | |
327 | } /* cy_stop */ | |
328 | ||
329 | static void | |
330 | cy_start(struct tty_struct *tty) | |
331 | { | |
332 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
333 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
334 | int channel; | |
335 | unsigned long flags; | |
336 | ||
337 | #ifdef SERIAL_DEBUG_OTHER | |
338 | printk("cy_start %s\n", tty->name); /* */ | |
339 | #endif | |
340 | ||
341 | if (serial_paranoia_check(info, tty->name, "cy_start")) | |
342 | return; | |
343 | ||
344 | channel = info->line; | |
345 | ||
346 | local_irq_save(flags); | |
347 | base_addr[CyCAR] = (u_char)(channel); | |
348 | base_addr[CyIER] |= CyTxMpty; | |
349 | local_irq_restore(flags); | |
350 | ||
351 | return; | |
352 | } /* cy_start */ | |
353 | ||
354 | ||
355 | /* | |
356 | * This routine is used by the interrupt handler to schedule | |
357 | * processing in the software interrupt portion of the driver | |
358 | * (also known as the "bottom half"). This can be called any | |
359 | * number of times for any channel without harm. | |
360 | */ | |
361 | static inline void | |
362 | cy_sched_event(struct cyclades_port *info, int event) | |
363 | { | |
364 | info->event |= 1 << event; /* remember what kind of event and who */ | |
365 | schedule_work(&info->tqueue); | |
366 | } /* cy_sched_event */ | |
367 | ||
368 | ||
369 | /* The real interrupt service routines are called | |
370 | whenever the card wants its hand held--chars | |
371 | received, out buffer empty, modem change, etc. | |
372 | */ | |
373 | static irqreturn_t | |
7d12e780 | 374 | cd2401_rxerr_interrupt(int irq, void *dev_id) |
1da177e4 LT |
375 | { |
376 | struct tty_struct *tty; | |
377 | struct cyclades_port *info; | |
378 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
379 | unsigned char err, rfoc; | |
380 | int channel; | |
381 | char data; | |
382 | ||
383 | /* determine the channel and change to that context */ | |
384 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
385 | info = &cy_port[channel]; | |
386 | info->last_active = jiffies; | |
387 | ||
388 | if ((err = base_addr[CyRISR]) & CyTIMEOUT) { | |
389 | /* This is a receive timeout interrupt, ignore it */ | |
390 | base_addr[CyREOIR] = CyNOTRANS; | |
391 | return IRQ_HANDLED; | |
392 | } | |
393 | ||
394 | /* Read a byte of data if there is any - assume the error | |
395 | * is associated with this character */ | |
396 | ||
397 | if ((rfoc = base_addr[CyRFOC]) != 0) | |
398 | data = base_addr[CyRDR]; | |
399 | else | |
400 | data = 0; | |
401 | ||
402 | /* if there is nowhere to put the data, discard it */ | |
403 | if(info->tty == 0) { | |
404 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
405 | return IRQ_HANDLED; | |
406 | } | |
407 | else { /* there is an open port for this data */ | |
408 | tty = info->tty; | |
409 | if(err & info->ignore_status_mask){ | |
410 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
411 | return IRQ_HANDLED; | |
412 | } | |
33f0f88f | 413 | if (tty_buffer_request_room(tty, 1) != 0){ |
1da177e4 LT |
414 | if (err & info->read_status_mask){ |
415 | if(err & CyBREAK){ | |
33f0f88f | 416 | tty_insert_flip_char(tty, data, TTY_BREAK); |
1da177e4 LT |
417 | if (info->flags & ASYNC_SAK){ |
418 | do_SAK(tty); | |
419 | } | |
420 | }else if(err & CyFRAME){ | |
33f0f88f | 421 | tty_insert_flip_char(tty, data, TTY_FRAME); |
1da177e4 | 422 | }else if(err & CyPARITY){ |
33f0f88f | 423 | tty_insert_flip_char(tty, data, TTY_PARITY); |
1da177e4 | 424 | }else if(err & CyOVERRUN){ |
33f0f88f | 425 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
1da177e4 LT |
426 | /* |
427 | If the flip buffer itself is | |
428 | overflowing, we still loose | |
429 | the next incoming character. | |
430 | */ | |
81e859ac GU |
431 | if (tty_buffer_request_room(tty, 1) != 0){ |
432 | tty_insert_flip_char(tty, data, TTY_FRAME); | |
433 | } | |
1da177e4 LT |
434 | /* These two conditions may imply */ |
435 | /* a normal read should be done. */ | |
436 | /* else if(data & CyTIMEOUT) */ | |
437 | /* else if(data & CySPECHAR) */ | |
438 | }else{ | |
33f0f88f | 439 | tty_insert_flip_char(tty, 0, TTY_NORMAL); |
1da177e4 LT |
440 | } |
441 | }else{ | |
81e859ac | 442 | tty_insert_flip_char(tty, data, TTY_NORMAL); |
1da177e4 LT |
443 | } |
444 | }else{ | |
445 | /* there was a software buffer overrun | |
446 | and nothing could be done about it!!! */ | |
447 | } | |
448 | } | |
81e859ac | 449 | tty_schedule_flip(tty); |
1da177e4 LT |
450 | /* end of service */ |
451 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
452 | return IRQ_HANDLED; | |
453 | } /* cy_rxerr_interrupt */ | |
454 | ||
455 | static irqreturn_t | |
7d12e780 | 456 | cd2401_modem_interrupt(int irq, void *dev_id) |
1da177e4 LT |
457 | { |
458 | struct cyclades_port *info; | |
459 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
460 | int channel; | |
461 | int mdm_change; | |
462 | int mdm_status; | |
463 | ||
464 | ||
465 | /* determine the channel and change to that context */ | |
466 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
467 | info = &cy_port[channel]; | |
468 | info->last_active = jiffies; | |
469 | ||
470 | mdm_change = base_addr[CyMISR]; | |
471 | mdm_status = base_addr[CyMSVR1]; | |
472 | ||
473 | if(info->tty == 0){ /* nowhere to put the data, ignore it */ | |
474 | ; | |
475 | }else{ | |
476 | if((mdm_change & CyDCD) | |
477 | && (info->flags & ASYNC_CHECK_CD)){ | |
478 | if(mdm_status & CyDCD){ | |
479 | /* CP('!'); */ | |
480 | cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP); | |
481 | } else { | |
482 | /* CP('@'); */ | |
483 | cy_sched_event(info, Cy_EVENT_HANGUP); | |
484 | } | |
485 | } | |
486 | if((mdm_change & CyCTS) | |
487 | && (info->flags & ASYNC_CTS_FLOW)){ | |
488 | if(info->tty->stopped){ | |
489 | if(mdm_status & CyCTS){ | |
490 | /* !!! cy_start isn't used because... */ | |
491 | info->tty->stopped = 0; | |
492 | base_addr[CyIER] |= CyTxMpty; | |
493 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
494 | } | |
495 | }else{ | |
496 | if(!(mdm_status & CyCTS)){ | |
497 | /* !!! cy_stop isn't used because... */ | |
498 | info->tty->stopped = 1; | |
499 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
500 | } | |
501 | } | |
502 | } | |
503 | if(mdm_status & CyDSR){ | |
504 | } | |
505 | } | |
506 | base_addr[CyMEOIR] = 0; | |
507 | return IRQ_HANDLED; | |
508 | } /* cy_modem_interrupt */ | |
509 | ||
510 | static irqreturn_t | |
7d12e780 | 511 | cd2401_tx_interrupt(int irq, void *dev_id) |
1da177e4 LT |
512 | { |
513 | struct cyclades_port *info; | |
514 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
515 | int channel; | |
516 | int char_count, saved_cnt; | |
517 | int outch; | |
518 | ||
519 | /* determine the channel and change to that context */ | |
520 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
521 | ||
522 | #ifdef CONFIG_REMOTE_DEBUG | |
523 | if (channel == DEBUG_PORT) { | |
524 | panic ("TxInt on debug port!!!"); | |
525 | } | |
526 | #endif | |
527 | ||
528 | info = &cy_port[channel]; | |
529 | ||
530 | /* validate the port number (as configured and open) */ | |
531 | if( (channel < 0) || (NR_PORTS <= channel) ){ | |
532 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
533 | base_addr[CyTEOIR] = CyNOTRANS; | |
534 | return IRQ_HANDLED; | |
535 | } | |
536 | info->last_active = jiffies; | |
537 | if(info->tty == 0){ | |
538 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
539 | if (info->xmit_cnt < WAKEUP_CHARS) { | |
540 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
541 | } | |
542 | base_addr[CyTEOIR] = CyNOTRANS; | |
543 | return IRQ_HANDLED; | |
544 | } | |
545 | ||
546 | /* load the on-chip space available for outbound data */ | |
547 | saved_cnt = char_count = base_addr[CyTFTC]; | |
548 | ||
549 | if(info->x_char) { /* send special char */ | |
550 | outch = info->x_char; | |
551 | base_addr[CyTDR] = outch; | |
552 | char_count--; | |
553 | info->x_char = 0; | |
554 | } | |
555 | ||
556 | if (info->x_break){ | |
557 | /* The Cirrus chip requires the "Embedded Transmit | |
558 | Commands" of start break, delay, and end break | |
559 | sequences to be sent. The duration of the | |
560 | break is given in TICs, which runs at HZ | |
561 | (typically 100) and the PPR runs at 200 Hz, | |
562 | so the delay is duration * 200/HZ, and thus a | |
563 | break can run from 1/100 sec to about 5/4 sec. | |
564 | Need to check these values - RGH 141095. | |
565 | */ | |
566 | base_addr[CyTDR] = 0; /* start break */ | |
567 | base_addr[CyTDR] = 0x81; | |
568 | base_addr[CyTDR] = 0; /* delay a bit */ | |
569 | base_addr[CyTDR] = 0x82; | |
570 | base_addr[CyTDR] = info->x_break*200/HZ; | |
571 | base_addr[CyTDR] = 0; /* terminate break */ | |
572 | base_addr[CyTDR] = 0x83; | |
573 | char_count -= 7; | |
574 | info->x_break = 0; | |
575 | } | |
576 | ||
577 | while (char_count > 0){ | |
578 | if (!info->xmit_cnt){ | |
579 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
580 | break; | |
581 | } | |
582 | if (info->xmit_buf == 0){ | |
583 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
584 | break; | |
585 | } | |
586 | if (info->tty->stopped || info->tty->hw_stopped){ | |
587 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
588 | break; | |
589 | } | |
590 | /* Because the Embedded Transmit Commands have been | |
591 | enabled, we must check to see if the escape | |
592 | character, NULL, is being sent. If it is, we | |
593 | must ensure that there is room for it to be | |
594 | doubled in the output stream. Therefore we | |
595 | no longer advance the pointer when the character | |
596 | is fetched, but rather wait until after the check | |
597 | for a NULL output character. (This is necessary | |
598 | because there may not be room for the two chars | |
599 | needed to send a NULL. | |
600 | */ | |
601 | outch = info->xmit_buf[info->xmit_tail]; | |
602 | if( outch ){ | |
603 | info->xmit_cnt--; | |
604 | info->xmit_tail = (info->xmit_tail + 1) | |
605 | & (PAGE_SIZE - 1); | |
606 | base_addr[CyTDR] = outch; | |
607 | char_count--; | |
608 | }else{ | |
609 | if(char_count > 1){ | |
610 | info->xmit_cnt--; | |
611 | info->xmit_tail = (info->xmit_tail + 1) | |
612 | & (PAGE_SIZE - 1); | |
613 | base_addr[CyTDR] = outch; | |
614 | base_addr[CyTDR] = 0; | |
615 | char_count--; | |
616 | char_count--; | |
617 | }else{ | |
618 | break; | |
619 | } | |
620 | } | |
621 | } | |
622 | ||
623 | if (info->xmit_cnt < WAKEUP_CHARS) { | |
624 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
625 | } | |
626 | base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS; | |
627 | return IRQ_HANDLED; | |
628 | } /* cy_tx_interrupt */ | |
629 | ||
630 | static irqreturn_t | |
7d12e780 | 631 | cd2401_rx_interrupt(int irq, void *dev_id) |
1da177e4 LT |
632 | { |
633 | struct tty_struct *tty; | |
634 | struct cyclades_port *info; | |
635 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
636 | int channel; | |
637 | char data; | |
638 | int char_count; | |
639 | int save_cnt; | |
81e859ac | 640 | int len; |
1da177e4 LT |
641 | |
642 | /* determine the channel and change to that context */ | |
643 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
644 | info = &cy_port[channel]; | |
645 | info->last_active = jiffies; | |
646 | save_cnt = char_count = base_addr[CyRFOC]; | |
647 | ||
648 | #ifdef CONFIG_REMOTE_DEBUG | |
649 | if (channel == DEBUG_PORT) { | |
650 | while (char_count--) { | |
651 | data = base_addr[CyRDR]; | |
652 | queueDebugChar(data); | |
653 | } | |
654 | } | |
655 | else | |
656 | #endif | |
657 | /* if there is nowhere to put the data, discard it */ | |
658 | if(info->tty == 0){ | |
659 | while(char_count--){ | |
660 | data = base_addr[CyRDR]; | |
661 | } | |
662 | }else{ /* there is an open port for this data */ | |
663 | tty = info->tty; | |
664 | /* load # characters available from the chip */ | |
665 | ||
666 | #ifdef CYCLOM_ENABLE_MONITORING | |
667 | ++info->mon.int_count; | |
668 | info->mon.char_count += char_count; | |
669 | if (char_count > info->mon.char_max) | |
670 | info->mon.char_max = char_count; | |
671 | info->mon.char_last = char_count; | |
672 | #endif | |
81e859ac GU |
673 | len = tty_buffer_request_room(tty, char_count); |
674 | while(len--){ | |
1da177e4 | 675 | data = base_addr[CyRDR]; |
33f0f88f | 676 | tty_insert_flip_char(tty, data, TTY_NORMAL); |
1da177e4 LT |
677 | #ifdef CYCLOM_16Y_HACK |
678 | udelay(10L); | |
679 | #endif | |
680 | } | |
81e859ac | 681 | tty_schedule_flip(tty); |
1da177e4 LT |
682 | } |
683 | /* end of service */ | |
684 | base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS; | |
685 | return IRQ_HANDLED; | |
686 | } /* cy_rx_interrupt */ | |
687 | ||
688 | /* | |
689 | * This routine is used to handle the "bottom half" processing for the | |
690 | * serial driver, known also the "software interrupt" processing. | |
691 | * This processing is done at the kernel interrupt level, after the | |
692 | * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This | |
693 | * is where time-consuming activities which can not be done in the | |
694 | * interrupt driver proper are done; the interrupt driver schedules | |
695 | * them using cy_sched_event(), and they get done here. | |
696 | * | |
697 | * This is done through one level of indirection--the task queue. | |
698 | * When a hardware interrupt service routine wants service by the | |
699 | * driver's bottom half, it enqueues the appropriate tq_struct (one | |
700 | * per port) to the keventd work queue and sets a request flag | |
701 | * that the work queue be processed. | |
702 | * | |
703 | * Although this may seem unwieldy, it gives the system a way to | |
704 | * pass an argument (in this case the pointer to the cyclades_port | |
705 | * structure) to the bottom half of the driver. Previous kernels | |
706 | * had to poll every port to see if that port needed servicing. | |
707 | */ | |
708 | static void | |
3e577a80 | 709 | do_softint(struct work_struct *ugly_api) |
1da177e4 | 710 | { |
3e577a80 | 711 | struct cyclades_port *info = container_of(ugly_api, struct cyclades_port, tqueue); |
1da177e4 LT |
712 | struct tty_struct *tty; |
713 | ||
714 | tty = info->tty; | |
715 | if (!tty) | |
716 | return; | |
717 | ||
718 | if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) { | |
719 | tty_hangup(info->tty); | |
720 | wake_up_interruptible(&info->open_wait); | |
721 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
722 | } | |
723 | if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) { | |
724 | wake_up_interruptible(&info->open_wait); | |
725 | } | |
726 | if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) { | |
727 | tty_wakeup(tty); | |
728 | } | |
729 | } /* do_softint */ | |
730 | ||
731 | ||
732 | /* This is called whenever a port becomes active; | |
733 | interrupts are enabled and DTR & RTS are turned on. | |
734 | */ | |
735 | static int | |
736 | startup(struct cyclades_port * info) | |
737 | { | |
738 | unsigned long flags; | |
739 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
740 | int channel; | |
741 | ||
742 | if (info->flags & ASYNC_INITIALIZED){ | |
743 | return 0; | |
744 | } | |
745 | ||
746 | if (!info->type){ | |
747 | if (info->tty){ | |
748 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
749 | } | |
750 | return 0; | |
751 | } | |
752 | if (!info->xmit_buf){ | |
753 | info->xmit_buf = (unsigned char *) get_zeroed_page (GFP_KERNEL); | |
754 | if (!info->xmit_buf){ | |
755 | return -ENOMEM; | |
756 | } | |
757 | } | |
758 | ||
759 | config_setup(info); | |
760 | ||
761 | channel = info->line; | |
762 | ||
763 | #ifdef SERIAL_DEBUG_OPEN | |
764 | printk("startup channel %d\n", channel); | |
765 | #endif | |
766 | ||
767 | local_irq_save(flags); | |
768 | base_addr[CyCAR] = (u_char)channel; | |
769 | write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR); | |
770 | ||
771 | base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ | |
772 | base_addr[CyMSVR1] = CyRTS; | |
773 | /* CP('S');CP('1'); */ | |
774 | base_addr[CyMSVR2] = CyDTR; | |
775 | ||
776 | #ifdef SERIAL_DEBUG_DTR | |
777 | printk("cyc: %d: raising DTR\n", __LINE__); | |
778 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
779 | #endif | |
780 | ||
781 | base_addr[CyIER] |= CyRxData; | |
782 | info->flags |= ASYNC_INITIALIZED; | |
783 | ||
784 | if (info->tty){ | |
785 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
786 | } | |
787 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
788 | ||
789 | local_irq_restore(flags); | |
790 | ||
791 | #ifdef SERIAL_DEBUG_OPEN | |
792 | printk(" done\n"); | |
793 | #endif | |
794 | return 0; | |
795 | } /* startup */ | |
796 | ||
797 | void | |
798 | start_xmit( struct cyclades_port *info ) | |
799 | { | |
800 | unsigned long flags; | |
801 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
802 | int channel; | |
803 | ||
804 | channel = info->line; | |
805 | local_irq_save(flags); | |
806 | base_addr[CyCAR] = channel; | |
807 | base_addr[CyIER] |= CyTxMpty; | |
808 | local_irq_restore(flags); | |
809 | } /* start_xmit */ | |
810 | ||
811 | /* | |
812 | * This routine shuts down a serial port; interrupts are disabled, | |
813 | * and DTR is dropped if the hangup on close termio flag is on. | |
814 | */ | |
815 | static void | |
816 | shutdown(struct cyclades_port * info) | |
817 | { | |
818 | unsigned long flags; | |
819 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
820 | int channel; | |
821 | ||
822 | if (!(info->flags & ASYNC_INITIALIZED)){ | |
823 | /* CP('$'); */ | |
824 | return; | |
825 | } | |
826 | ||
827 | channel = info->line; | |
828 | ||
829 | #ifdef SERIAL_DEBUG_OPEN | |
830 | printk("shutdown channel %d\n", channel); | |
831 | #endif | |
832 | ||
833 | /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE | |
834 | SENT BEFORE DROPPING THE LINE !!! (Perhaps | |
835 | set some flag that is read when XMTY happens.) | |
836 | Other choices are to delay some fixed interval | |
837 | or schedule some later processing. | |
838 | */ | |
839 | local_irq_save(flags); | |
840 | if (info->xmit_buf){ | |
841 | free_page((unsigned long) info->xmit_buf); | |
e5a301ee | 842 | info->xmit_buf = NULL; |
1da177e4 LT |
843 | } |
844 | ||
845 | base_addr[CyCAR] = (u_char)channel; | |
846 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { | |
847 | base_addr[CyMSVR1] = 0; | |
848 | /* CP('C');CP('1'); */ | |
849 | base_addr[CyMSVR2] = 0; | |
850 | #ifdef SERIAL_DEBUG_DTR | |
851 | printk("cyc: %d: dropping DTR\n", __LINE__); | |
852 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
853 | #endif | |
854 | } | |
855 | write_cy_cmd(base_addr,CyDIS_RCVR); | |
856 | /* it may be appropriate to clear _XMIT at | |
857 | some later date (after testing)!!! */ | |
858 | ||
859 | if (info->tty){ | |
860 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
861 | } | |
862 | info->flags &= ~ASYNC_INITIALIZED; | |
863 | local_irq_restore(flags); | |
864 | ||
865 | #ifdef SERIAL_DEBUG_OPEN | |
866 | printk(" done\n"); | |
867 | #endif | |
868 | return; | |
869 | } /* shutdown */ | |
870 | ||
871 | /* | |
872 | * This routine finds or computes the various line characteristics. | |
873 | */ | |
874 | static void | |
875 | config_setup(struct cyclades_port * info) | |
876 | { | |
877 | unsigned long flags; | |
878 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
879 | int channel; | |
880 | unsigned cflag; | |
881 | int i; | |
882 | unsigned char ti, need_init_chan = 0; | |
883 | ||
884 | if (!info->tty || !info->tty->termios){ | |
885 | return; | |
886 | } | |
887 | if (info->line == -1){ | |
888 | return; | |
889 | } | |
890 | cflag = info->tty->termios->c_cflag; | |
891 | ||
892 | /* baud rate */ | |
893 | i = cflag & CBAUD; | |
894 | #ifdef CBAUDEX | |
895 | /* Starting with kernel 1.1.65, there is direct support for | |
896 | higher baud rates. The following code supports those | |
897 | changes. The conditional aspect allows this driver to be | |
898 | used for earlier as well as later kernel versions. (The | |
899 | mapping is slightly different from serial.c because there | |
900 | is still the possibility of supporting 75 kbit/sec with | |
901 | the Cyclades board.) | |
902 | */ | |
903 | if (i & CBAUDEX) { | |
904 | if (i == B57600) | |
905 | i = 16; | |
906 | else if(i == B115200) | |
907 | i = 18; | |
908 | #ifdef B78600 | |
909 | else if(i == B78600) | |
910 | i = 17; | |
911 | #endif | |
912 | else | |
913 | info->tty->termios->c_cflag &= ~CBAUDEX; | |
914 | } | |
915 | #endif | |
916 | if (i == 15) { | |
917 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
918 | i += 1; | |
919 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
920 | i += 3; | |
921 | } | |
922 | /* Don't ever change the speed of the console port. It will | |
923 | * run at the speed specified in bootinfo, or at 19.2K */ | |
924 | /* Actually, it should run at whatever speed 166Bug was using */ | |
925 | /* Note info->timeout isn't used at present */ | |
926 | if (info != serial_console_info) { | |
927 | info->tbpr = baud_bpr[i]; /* Tx BPR */ | |
928 | info->tco = baud_co[i]; /* Tx CO */ | |
929 | info->rbpr = baud_bpr[i]; /* Rx BPR */ | |
930 | info->rco = baud_co[i] >> 5; /* Rx CO */ | |
931 | if (baud_table[i] == 134) { | |
932 | info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2; | |
933 | /* get it right for 134.5 baud */ | |
934 | } else if (baud_table[i]) { | |
935 | info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2; | |
936 | /* this needs to be propagated into the card info */ | |
937 | } else { | |
938 | info->timeout = 0; | |
939 | } | |
940 | } | |
941 | /* By tradition (is it a standard?) a baud rate of zero | |
942 | implies the line should be/has been closed. A bit | |
943 | later in this routine such a test is performed. */ | |
944 | ||
945 | /* byte size and parity */ | |
946 | info->cor7 = 0; | |
947 | info->cor6 = 0; | |
948 | info->cor5 = 0; | |
949 | info->cor4 = (info->default_threshold | |
950 | ? info->default_threshold | |
951 | : baud_cor4[i]); /* receive threshold */ | |
952 | /* Following two lines added 101295, RGH. */ | |
953 | /* It is obviously wrong to access CyCORx, and not info->corx here, | |
954 | * try and remember to fix it later! */ | |
955 | channel = info->line; | |
956 | base_addr[CyCAR] = (u_char)channel; | |
957 | if (C_CLOCAL(info->tty)) { | |
958 | if (base_addr[CyIER] & CyMdmCh) | |
959 | base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */ | |
960 | /* ignore 1->0 modem transitions */ | |
961 | if (base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) | |
962 | base_addr[CyCOR4] &= ~(CyDSR|CyCTS|CyDCD); | |
963 | /* ignore 0->1 modem transitions */ | |
964 | if (base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) | |
965 | base_addr[CyCOR5] &= ~(CyDSR|CyCTS|CyDCD); | |
966 | } else { | |
967 | if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh) | |
968 | base_addr[CyIER] |= CyMdmCh; /* with modem intr */ | |
969 | /* act on 1->0 modem transitions */ | |
970 | if ((base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD)) | |
971 | base_addr[CyCOR4] |= CyDSR|CyCTS|CyDCD; | |
972 | /* act on 0->1 modem transitions */ | |
973 | if ((base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD)) | |
974 | base_addr[CyCOR5] |= CyDSR|CyCTS|CyDCD; | |
975 | } | |
976 | info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP; | |
977 | info->cor2 = CyETC; | |
978 | switch(cflag & CSIZE){ | |
979 | case CS5: | |
980 | info->cor1 = Cy_5_BITS; | |
981 | break; | |
982 | case CS6: | |
983 | info->cor1 = Cy_6_BITS; | |
984 | break; | |
985 | case CS7: | |
986 | info->cor1 = Cy_7_BITS; | |
987 | break; | |
988 | case CS8: | |
989 | info->cor1 = Cy_8_BITS; | |
990 | break; | |
991 | } | |
992 | if (cflag & PARENB){ | |
993 | if (cflag & PARODD){ | |
994 | info->cor1 |= CyPARITY_O; | |
995 | }else{ | |
996 | info->cor1 |= CyPARITY_E; | |
997 | } | |
998 | }else{ | |
999 | info->cor1 |= CyPARITY_NONE; | |
1000 | } | |
1001 | ||
1002 | /* CTS flow control flag */ | |
1003 | #if 0 | |
1004 | /* Don't complcate matters for now! RGH 141095 */ | |
1005 | if (cflag & CRTSCTS){ | |
1006 | info->flags |= ASYNC_CTS_FLOW; | |
1007 | info->cor2 |= CyCtsAE; | |
1008 | }else{ | |
1009 | info->flags &= ~ASYNC_CTS_FLOW; | |
1010 | info->cor2 &= ~CyCtsAE; | |
1011 | } | |
1012 | #endif | |
1013 | if (cflag & CLOCAL) | |
1014 | info->flags &= ~ASYNC_CHECK_CD; | |
1015 | else | |
1016 | info->flags |= ASYNC_CHECK_CD; | |
1017 | ||
1018 | /*********************************************** | |
1019 | The hardware option, CyRtsAO, presents RTS when | |
1020 | the chip has characters to send. Since most modems | |
1021 | use RTS as reverse (inbound) flow control, this | |
1022 | option is not used. If inbound flow control is | |
1023 | necessary, DTR can be programmed to provide the | |
1024 | appropriate signals for use with a non-standard | |
1025 | cable. Contact Marcio Saito for details. | |
1026 | ***********************************************/ | |
1027 | ||
1028 | channel = info->line; | |
1029 | ||
1030 | local_irq_save(flags); | |
1031 | base_addr[CyCAR] = (u_char)channel; | |
1032 | ||
1033 | /* CyCMR set once only in mvme167_init_serial() */ | |
1034 | if (base_addr[CyLICR] != channel << 2) | |
1035 | base_addr[CyLICR] = channel << 2; | |
1036 | if (base_addr[CyLIVR] != 0x5c) | |
1037 | base_addr[CyLIVR] = 0x5c; | |
1038 | ||
1039 | /* tx and rx baud rate */ | |
1040 | ||
1041 | if (base_addr[CyCOR1] != info->cor1) | |
1042 | need_init_chan = 1; | |
1043 | if (base_addr[CyTCOR] != info->tco) | |
1044 | base_addr[CyTCOR] = info->tco; | |
1045 | if (base_addr[CyTBPR] != info->tbpr) | |
1046 | base_addr[CyTBPR] = info->tbpr; | |
1047 | if (base_addr[CyRCOR] != info->rco) | |
1048 | base_addr[CyRCOR] = info->rco; | |
1049 | if (base_addr[CyRBPR] != info->rbpr) | |
1050 | base_addr[CyRBPR] = info->rbpr; | |
1051 | ||
1052 | /* set line characteristics according configuration */ | |
1053 | ||
1054 | if (base_addr[CySCHR1] != START_CHAR(info->tty)) | |
1055 | base_addr[CySCHR1] = START_CHAR(info->tty); | |
1056 | if (base_addr[CySCHR2] != STOP_CHAR(info->tty)) | |
1057 | base_addr[CySCHR2] = STOP_CHAR(info->tty); | |
1058 | if (base_addr[CySCRL] != START_CHAR(info->tty)) | |
1059 | base_addr[CySCRL] = START_CHAR(info->tty); | |
1060 | if (base_addr[CySCRH] != START_CHAR(info->tty)) | |
1061 | base_addr[CySCRH] = START_CHAR(info->tty); | |
1062 | if (base_addr[CyCOR1] != info->cor1) | |
1063 | base_addr[CyCOR1] = info->cor1; | |
1064 | if (base_addr[CyCOR2] != info->cor2) | |
1065 | base_addr[CyCOR2] = info->cor2; | |
1066 | if (base_addr[CyCOR3] != info->cor3) | |
1067 | base_addr[CyCOR3] = info->cor3; | |
1068 | if (base_addr[CyCOR4] != info->cor4) | |
1069 | base_addr[CyCOR4] = info->cor4; | |
1070 | if (base_addr[CyCOR5] != info->cor5) | |
1071 | base_addr[CyCOR5] = info->cor5; | |
1072 | if (base_addr[CyCOR6] != info->cor6) | |
1073 | base_addr[CyCOR6] = info->cor6; | |
1074 | if (base_addr[CyCOR7] != info->cor7) | |
1075 | base_addr[CyCOR7] = info->cor7; | |
1076 | ||
1077 | if (need_init_chan) | |
1078 | write_cy_cmd(base_addr,CyINIT_CHAN); | |
1079 | ||
1080 | base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ | |
1081 | ||
1082 | /* 2ms default rx timeout */ | |
1083 | ti = info->default_timeout ? info->default_timeout : 0x02; | |
1084 | if (base_addr[CyRTPRL] != ti) | |
1085 | base_addr[CyRTPRL] = ti; | |
1086 | if (base_addr[CyRTPRH] != 0) | |
1087 | base_addr[CyRTPRH] = 0; | |
1088 | ||
1089 | /* Set up RTS here also ????? RGH 141095 */ | |
1090 | if(i == 0){ /* baud rate is zero, turn off line */ | |
1091 | if ((base_addr[CyMSVR2] & CyDTR) == CyDTR) | |
1092 | base_addr[CyMSVR2] = 0; | |
1093 | #ifdef SERIAL_DEBUG_DTR | |
1094 | printk("cyc: %d: dropping DTR\n", __LINE__); | |
1095 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1096 | #endif | |
1097 | }else{ | |
1098 | if ((base_addr[CyMSVR2] & CyDTR) != CyDTR) | |
1099 | base_addr[CyMSVR2] = CyDTR; | |
1100 | #ifdef SERIAL_DEBUG_DTR | |
1101 | printk("cyc: %d: raising DTR\n", __LINE__); | |
1102 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1103 | #endif | |
1104 | } | |
1105 | ||
1106 | if (info->tty){ | |
1107 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
1108 | } | |
1109 | ||
1110 | local_irq_restore(flags); | |
1111 | ||
1112 | } /* config_setup */ | |
1113 | ||
1114 | ||
1115 | static void | |
1116 | cy_put_char(struct tty_struct *tty, unsigned char ch) | |
1117 | { | |
1118 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1119 | unsigned long flags; | |
1120 | ||
1121 | #ifdef SERIAL_DEBUG_IO | |
1122 | printk("cy_put_char %s(0x%02x)\n", tty->name, ch); | |
1123 | #endif | |
1124 | ||
1125 | if (serial_paranoia_check(info, tty->name, "cy_put_char")) | |
1126 | return; | |
1127 | ||
d321765f | 1128 | if (!info->xmit_buf) |
1da177e4 LT |
1129 | return; |
1130 | ||
1131 | local_irq_save(flags); | |
1132 | if (info->xmit_cnt >= PAGE_SIZE - 1) { | |
1133 | local_irq_restore(flags); | |
1134 | return; | |
1135 | } | |
1136 | ||
1137 | info->xmit_buf[info->xmit_head++] = ch; | |
1138 | info->xmit_head &= PAGE_SIZE - 1; | |
1139 | info->xmit_cnt++; | |
1140 | local_irq_restore(flags); | |
1141 | } /* cy_put_char */ | |
1142 | ||
1143 | ||
1144 | static void | |
1145 | cy_flush_chars(struct tty_struct *tty) | |
1146 | { | |
1147 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1148 | unsigned long flags; | |
1149 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1150 | int channel; | |
1151 | ||
1152 | #ifdef SERIAL_DEBUG_IO | |
1153 | printk("cy_flush_chars %s\n", tty->name); /* */ | |
1154 | #endif | |
1155 | ||
1156 | if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) | |
1157 | return; | |
1158 | ||
1159 | if (info->xmit_cnt <= 0 || tty->stopped | |
1160 | || tty->hw_stopped || !info->xmit_buf) | |
1161 | return; | |
1162 | ||
1163 | channel = info->line; | |
1164 | ||
1165 | local_irq_save(flags); | |
1166 | base_addr[CyCAR] = channel; | |
1167 | base_addr[CyIER] |= CyTxMpty; | |
1168 | local_irq_restore(flags); | |
1169 | } /* cy_flush_chars */ | |
1170 | ||
1171 | ||
1172 | /* This routine gets called when tty_write has put something into | |
1173 | the write_queue. If the port is not already transmitting stuff, | |
1174 | start it off by enabling interrupts. The interrupt service | |
1175 | routine will then ensure that the characters are sent. If the | |
1176 | port is already active, there is no need to kick it. | |
1177 | */ | |
1178 | static int | |
1179 | cy_write(struct tty_struct * tty, | |
1180 | const unsigned char *buf, int count) | |
1181 | { | |
1182 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1183 | unsigned long flags; | |
1184 | int c, total = 0; | |
1185 | ||
1186 | #ifdef SERIAL_DEBUG_IO | |
1187 | printk("cy_write %s\n", tty->name); /* */ | |
1188 | #endif | |
1189 | ||
1190 | if (serial_paranoia_check(info, tty->name, "cy_write")){ | |
1191 | return 0; | |
1192 | } | |
1193 | ||
d321765f | 1194 | if (!info->xmit_buf){ |
1da177e4 LT |
1195 | return 0; |
1196 | } | |
1197 | ||
1198 | while (1) { | |
1199 | local_irq_save(flags); | |
1200 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, | |
1201 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
1202 | if (c <= 0) { | |
1203 | local_irq_restore(flags); | |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
1208 | info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1209 | info->xmit_cnt += c; | |
1210 | local_irq_restore(flags); | |
1211 | ||
1212 | buf += c; | |
1213 | count -= c; | |
1214 | total += c; | |
1215 | } | |
1216 | ||
1217 | if (info->xmit_cnt | |
1218 | && !tty->stopped | |
1219 | && !tty->hw_stopped ) { | |
1220 | start_xmit(info); | |
1221 | } | |
1222 | return total; | |
1223 | } /* cy_write */ | |
1224 | ||
1225 | ||
1226 | static int | |
1227 | cy_write_room(struct tty_struct *tty) | |
1228 | { | |
1229 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1230 | int ret; | |
1231 | ||
1232 | #ifdef SERIAL_DEBUG_IO | |
1233 | printk("cy_write_room %s\n", tty->name); /* */ | |
1234 | #endif | |
1235 | ||
1236 | if (serial_paranoia_check(info, tty->name, "cy_write_room")) | |
1237 | return 0; | |
1238 | ret = PAGE_SIZE - info->xmit_cnt - 1; | |
1239 | if (ret < 0) | |
1240 | ret = 0; | |
1241 | return ret; | |
1242 | } /* cy_write_room */ | |
1243 | ||
1244 | ||
1245 | static int | |
1246 | cy_chars_in_buffer(struct tty_struct *tty) | |
1247 | { | |
1248 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1249 | ||
1250 | #ifdef SERIAL_DEBUG_IO | |
1251 | printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */ | |
1252 | #endif | |
1253 | ||
1254 | if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) | |
1255 | return 0; | |
1256 | ||
1257 | return info->xmit_cnt; | |
1258 | } /* cy_chars_in_buffer */ | |
1259 | ||
1260 | ||
1261 | static void | |
1262 | cy_flush_buffer(struct tty_struct *tty) | |
1263 | { | |
1264 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1265 | unsigned long flags; | |
1266 | ||
1267 | #ifdef SERIAL_DEBUG_IO | |
1268 | printk("cy_flush_buffer %s\n", tty->name); /* */ | |
1269 | #endif | |
1270 | ||
1271 | if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) | |
1272 | return; | |
1273 | local_irq_save(flags); | |
1274 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1275 | local_irq_restore(flags); | |
1276 | tty_wakeup(tty); | |
1277 | } /* cy_flush_buffer */ | |
1278 | ||
1279 | ||
1280 | /* This routine is called by the upper-layer tty layer to signal | |
1281 | that incoming characters should be throttled or that the | |
1282 | throttle should be released. | |
1283 | */ | |
1284 | static void | |
1285 | cy_throttle(struct tty_struct * tty) | |
1286 | { | |
1287 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1288 | unsigned long flags; | |
1289 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1290 | int channel; | |
1291 | ||
1292 | #ifdef SERIAL_DEBUG_THROTTLE | |
1293 | char buf[64]; | |
1294 | ||
1295 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
1296 | tty->ldisc.chars_in_buffer(tty)); | |
1297 | printk("cy_throttle %s\n", tty->name); | |
1298 | #endif | |
1299 | ||
1300 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){ | |
1301 | return; | |
1302 | } | |
1303 | ||
1304 | if (I_IXOFF(tty)) { | |
1305 | info->x_char = STOP_CHAR(tty); | |
1306 | /* Should use the "Send Special Character" feature!!! */ | |
1307 | } | |
1308 | ||
1309 | channel = info->line; | |
1310 | ||
1311 | local_irq_save(flags); | |
1312 | base_addr[CyCAR] = (u_char)channel; | |
1313 | base_addr[CyMSVR1] = 0; | |
1314 | local_irq_restore(flags); | |
1315 | ||
1316 | return; | |
1317 | } /* cy_throttle */ | |
1318 | ||
1319 | ||
1320 | static void | |
1321 | cy_unthrottle(struct tty_struct * tty) | |
1322 | { | |
1323 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1324 | unsigned long flags; | |
1325 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1326 | int channel; | |
1327 | ||
1328 | #ifdef SERIAL_DEBUG_THROTTLE | |
1329 | char buf[64]; | |
1330 | ||
1331 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
1332 | tty->ldisc.chars_in_buffer(tty)); | |
1333 | printk("cy_unthrottle %s\n", tty->name); | |
1334 | #endif | |
1335 | ||
1336 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){ | |
1337 | return; | |
1338 | } | |
1339 | ||
1340 | if (I_IXOFF(tty)) { | |
1341 | info->x_char = START_CHAR(tty); | |
1342 | /* Should use the "Send Special Character" feature!!! */ | |
1343 | } | |
1344 | ||
1345 | channel = info->line; | |
1346 | ||
1347 | local_irq_save(flags); | |
1348 | base_addr[CyCAR] = (u_char)channel; | |
1349 | base_addr[CyMSVR1] = CyRTS; | |
1350 | local_irq_restore(flags); | |
1351 | ||
1352 | return; | |
1353 | } /* cy_unthrottle */ | |
1354 | ||
1355 | static int | |
1356 | get_serial_info(struct cyclades_port * info, | |
e5a301ee | 1357 | struct serial_struct __user * retinfo) |
1da177e4 LT |
1358 | { |
1359 | struct serial_struct tmp; | |
1360 | ||
1361 | /* CP('g'); */ | |
1362 | if (!retinfo) | |
1363 | return -EFAULT; | |
1364 | memset(&tmp, 0, sizeof(tmp)); | |
1365 | tmp.type = info->type; | |
1366 | tmp.line = info->line; | |
1367 | tmp.port = info->line; | |
1368 | tmp.irq = 0; | |
1369 | tmp.flags = info->flags; | |
1370 | tmp.baud_base = 0; /*!!!*/ | |
1371 | tmp.close_delay = info->close_delay; | |
1372 | tmp.custom_divisor = 0; /*!!!*/ | |
1373 | tmp.hub6 = 0; /*!!!*/ | |
1374 | return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0; | |
1375 | } /* get_serial_info */ | |
1376 | ||
1377 | static int | |
1378 | set_serial_info(struct cyclades_port * info, | |
e5a301ee | 1379 | struct serial_struct __user * new_info) |
1da177e4 LT |
1380 | { |
1381 | struct serial_struct new_serial; | |
1382 | struct cyclades_port old_info; | |
1383 | ||
1384 | /* CP('s'); */ | |
1385 | if (!new_info) | |
1386 | return -EFAULT; | |
1387 | if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) | |
1388 | return -EFAULT; | |
1389 | old_info = *info; | |
1390 | ||
1391 | if (!capable(CAP_SYS_ADMIN)) { | |
1392 | if ((new_serial.close_delay != info->close_delay) || | |
1393 | ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != | |
1394 | (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))) | |
1395 | return -EPERM; | |
1396 | info->flags = ((info->flags & ~ASYNC_USR_MASK) | | |
1397 | (new_serial.flags & ASYNC_USR_MASK)); | |
1398 | goto check_and_exit; | |
1399 | } | |
1400 | ||
1401 | ||
1402 | /* | |
1403 | * OK, past this point, all the error checking has been done. | |
1404 | * At this point, we start making changes..... | |
1405 | */ | |
1406 | ||
1407 | info->flags = ((info->flags & ~ASYNC_FLAGS) | | |
1408 | (new_serial.flags & ASYNC_FLAGS)); | |
1409 | info->close_delay = new_serial.close_delay; | |
1410 | ||
1411 | ||
1412 | check_and_exit: | |
1413 | if (info->flags & ASYNC_INITIALIZED){ | |
1414 | config_setup(info); | |
1415 | return 0; | |
1416 | }else{ | |
1417 | return startup(info); | |
1418 | } | |
1419 | } /* set_serial_info */ | |
1420 | ||
1421 | static int | |
1422 | cy_tiocmget(struct tty_struct *tty, struct file *file) | |
1423 | { | |
1424 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1425 | int channel; | |
1426 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1427 | unsigned long flags; | |
1428 | unsigned char status; | |
1da177e4 LT |
1429 | |
1430 | channel = info->line; | |
1431 | ||
1432 | local_irq_save(flags); | |
1433 | base_addr[CyCAR] = (u_char)channel; | |
1434 | status = base_addr[CyMSVR1] | base_addr[CyMSVR2]; | |
1435 | local_irq_restore(flags); | |
1436 | ||
1437 | return ((status & CyRTS) ? TIOCM_RTS : 0) | |
1438 | | ((status & CyDTR) ? TIOCM_DTR : 0) | |
1439 | | ((status & CyDCD) ? TIOCM_CAR : 0) | |
1440 | | ((status & CyDSR) ? TIOCM_DSR : 0) | |
1441 | | ((status & CyCTS) ? TIOCM_CTS : 0); | |
1442 | } /* cy_tiocmget */ | |
1443 | ||
1444 | static int | |
1445 | cy_tiocmset(struct tty_struct *tty, struct file *file, | |
1446 | unsigned int set, unsigned int clear) | |
1447 | { | |
1448 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1449 | int channel; | |
1450 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1451 | unsigned long flags; | |
1da177e4 LT |
1452 | |
1453 | channel = info->line; | |
1454 | ||
1455 | if (set & TIOCM_RTS){ | |
1456 | local_irq_save(flags); | |
1457 | base_addr[CyCAR] = (u_char)channel; | |
1458 | base_addr[CyMSVR1] = CyRTS; | |
1459 | local_irq_restore(flags); | |
1460 | } | |
1461 | if (set & TIOCM_DTR){ | |
1462 | local_irq_save(flags); | |
1463 | base_addr[CyCAR] = (u_char)channel; | |
1464 | /* CP('S');CP('2'); */ | |
1465 | base_addr[CyMSVR2] = CyDTR; | |
1466 | #ifdef SERIAL_DEBUG_DTR | |
1467 | printk("cyc: %d: raising DTR\n", __LINE__); | |
1468 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1469 | #endif | |
1470 | local_irq_restore(flags); | |
1471 | } | |
1472 | ||
1473 | if (clear & TIOCM_RTS){ | |
1474 | local_irq_save(flags); | |
1475 | base_addr[CyCAR] = (u_char)channel; | |
1476 | base_addr[CyMSVR1] = 0; | |
1477 | local_irq_restore(flags); | |
1478 | } | |
1479 | if (clear & TIOCM_DTR){ | |
1480 | local_irq_save(flags); | |
1481 | base_addr[CyCAR] = (u_char)channel; | |
1482 | /* CP('C');CP('2'); */ | |
1483 | base_addr[CyMSVR2] = 0; | |
1484 | #ifdef SERIAL_DEBUG_DTR | |
1485 | printk("cyc: %d: dropping DTR\n", __LINE__); | |
1486 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1487 | #endif | |
1488 | local_irq_restore(flags); | |
1489 | } | |
1490 | ||
1491 | return 0; | |
1492 | } /* set_modem_info */ | |
1493 | ||
1494 | static void | |
1495 | send_break( struct cyclades_port * info, int duration) | |
1496 | { /* Let the transmit ISR take care of this (since it | |
1497 | requires stuffing characters into the output stream). | |
1498 | */ | |
1499 | info->x_break = duration; | |
1500 | if (!info->xmit_cnt ) { | |
1501 | start_xmit(info); | |
1502 | } | |
1503 | } /* send_break */ | |
1504 | ||
1505 | static int | |
e5a301ee | 1506 | get_mon_info(struct cyclades_port * info, struct cyclades_monitor __user * mon) |
1da177e4 LT |
1507 | { |
1508 | ||
1509 | if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) | |
1510 | return -EFAULT; | |
1511 | info->mon.int_count = 0; | |
1512 | info->mon.char_count = 0; | |
1513 | info->mon.char_max = 0; | |
1514 | info->mon.char_last = 0; | |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static int | |
e5a301ee | 1519 | set_threshold(struct cyclades_port * info, unsigned long __user *arg) |
1da177e4 LT |
1520 | { |
1521 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1522 | unsigned long value; | |
1523 | int channel; | |
1524 | ||
1525 | if (get_user(value, arg)) | |
1526 | return -EFAULT; | |
1527 | ||
1528 | channel = info->line; | |
1529 | info->cor4 &= ~CyREC_FIFO; | |
1530 | info->cor4 |= value & CyREC_FIFO; | |
1531 | base_addr[CyCOR4] = info->cor4; | |
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | static int | |
e5a301ee | 1536 | get_threshold(struct cyclades_port * info, unsigned long __user *value) |
1da177e4 LT |
1537 | { |
1538 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1539 | int channel; | |
1540 | unsigned long tmp; | |
1541 | ||
1542 | channel = info->line; | |
1543 | ||
1544 | tmp = base_addr[CyCOR4] & CyREC_FIFO; | |
1545 | return put_user(tmp,value); | |
1546 | } | |
1547 | ||
1548 | static int | |
e5a301ee | 1549 | set_default_threshold(struct cyclades_port * info, unsigned long __user *arg) |
1da177e4 LT |
1550 | { |
1551 | unsigned long value; | |
1552 | ||
1553 | if (get_user(value, arg)) | |
1554 | return -EFAULT; | |
1555 | ||
1556 | info->default_threshold = value & 0x0f; | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | static int | |
e5a301ee | 1561 | get_default_threshold(struct cyclades_port * info, unsigned long __user *value) |
1da177e4 LT |
1562 | { |
1563 | return put_user(info->default_threshold,value); | |
1564 | } | |
1565 | ||
1566 | static int | |
e5a301ee | 1567 | set_timeout(struct cyclades_port * info, unsigned long __user *arg) |
1da177e4 LT |
1568 | { |
1569 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1570 | int channel; | |
1571 | unsigned long value; | |
1572 | ||
1573 | if (get_user(value, arg)) | |
1574 | return -EFAULT; | |
1575 | ||
1576 | channel = info->line; | |
1577 | ||
1578 | base_addr[CyRTPRL] = value & 0xff; | |
1579 | base_addr[CyRTPRH] = (value >> 8) & 0xff; | |
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | static int | |
e5a301ee | 1584 | get_timeout(struct cyclades_port * info, unsigned long __user *value) |
1da177e4 LT |
1585 | { |
1586 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1587 | int channel; | |
1588 | unsigned long tmp; | |
1589 | ||
1590 | channel = info->line; | |
1591 | ||
1592 | tmp = base_addr[CyRTPRL]; | |
1593 | return put_user(tmp,value); | |
1594 | } | |
1595 | ||
1596 | static int | |
1597 | set_default_timeout(struct cyclades_port * info, unsigned long value) | |
1598 | { | |
1599 | info->default_timeout = value & 0xff; | |
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | static int | |
e5a301ee | 1604 | get_default_timeout(struct cyclades_port * info, unsigned long __user *value) |
1da177e4 LT |
1605 | { |
1606 | return put_user(info->default_timeout,value); | |
1607 | } | |
1608 | ||
1609 | static int | |
1610 | cy_ioctl(struct tty_struct *tty, struct file * file, | |
1611 | unsigned int cmd, unsigned long arg) | |
1612 | { | |
1613 | unsigned long val; | |
1614 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1615 | int ret_val = 0; | |
e5a301ee | 1616 | void __user *argp = (void __user *)arg; |
1da177e4 LT |
1617 | |
1618 | #ifdef SERIAL_DEBUG_OTHER | |
1619 | printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */ | |
1620 | #endif | |
1621 | ||
1622 | switch (cmd) { | |
1623 | case CYGETMON: | |
e5a301ee | 1624 | ret_val = get_mon_info(info, argp); |
1da177e4 LT |
1625 | break; |
1626 | case CYGETTHRESH: | |
e5a301ee | 1627 | ret_val = get_threshold(info, argp); |
1da177e4 LT |
1628 | break; |
1629 | case CYSETTHRESH: | |
e5a301ee | 1630 | ret_val = set_threshold(info, argp); |
1da177e4 LT |
1631 | break; |
1632 | case CYGETDEFTHRESH: | |
e5a301ee | 1633 | ret_val = get_default_threshold(info, argp); |
1da177e4 LT |
1634 | break; |
1635 | case CYSETDEFTHRESH: | |
e5a301ee | 1636 | ret_val = set_default_threshold(info, argp); |
1da177e4 LT |
1637 | break; |
1638 | case CYGETTIMEOUT: | |
e5a301ee | 1639 | ret_val = get_timeout(info, argp); |
1da177e4 LT |
1640 | break; |
1641 | case CYSETTIMEOUT: | |
e5a301ee | 1642 | ret_val = set_timeout(info, argp); |
1da177e4 LT |
1643 | break; |
1644 | case CYGETDEFTIMEOUT: | |
e5a301ee | 1645 | ret_val = get_default_timeout(info, argp); |
1da177e4 LT |
1646 | break; |
1647 | case CYSETDEFTIMEOUT: | |
1648 | ret_val = set_default_timeout(info, (unsigned long)arg); | |
1649 | break; | |
1650 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1651 | ret_val = tty_check_change(tty); | |
1652 | if (ret_val) | |
1653 | break; | |
1654 | tty_wait_until_sent(tty,0); | |
1655 | if (!arg) | |
1656 | send_break(info, HZ/4); /* 1/4 second */ | |
1657 | break; | |
1658 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1659 | ret_val = tty_check_change(tty); | |
1660 | if (ret_val) | |
1661 | break; | |
1662 | tty_wait_until_sent(tty,0); | |
1663 | send_break(info, arg ? arg*(HZ/10) : HZ/4); | |
1664 | break; | |
1665 | ||
1666 | /* The following commands are incompletely implemented!!! */ | |
1667 | case TIOCGSOFTCAR: | |
e5a301ee | 1668 | ret_val = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp); |
1da177e4 LT |
1669 | break; |
1670 | case TIOCSSOFTCAR: | |
e5a301ee | 1671 | ret_val = get_user(val, (unsigned long __user *) argp); |
1da177e4 LT |
1672 | if (ret_val) |
1673 | break; | |
1674 | tty->termios->c_cflag = | |
1675 | ((tty->termios->c_cflag & ~CLOCAL) | (val ? CLOCAL : 0)); | |
1676 | break; | |
1677 | case TIOCGSERIAL: | |
e5a301ee | 1678 | ret_val = get_serial_info(info, argp); |
1da177e4 LT |
1679 | break; |
1680 | case TIOCSSERIAL: | |
e5a301ee | 1681 | ret_val = set_serial_info(info, argp); |
1da177e4 LT |
1682 | break; |
1683 | default: | |
1684 | ret_val = -ENOIOCTLCMD; | |
1685 | } | |
1686 | ||
1687 | #ifdef SERIAL_DEBUG_OTHER | |
1688 | printk("cy_ioctl done\n"); | |
1689 | #endif | |
1690 | ||
1691 | return ret_val; | |
1692 | } /* cy_ioctl */ | |
1693 | ||
1694 | ||
1695 | ||
1696 | ||
1697 | static void | |
606d099c | 1698 | cy_set_termios(struct tty_struct *tty, struct ktermios * old_termios) |
1da177e4 LT |
1699 | { |
1700 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1701 | ||
1702 | #ifdef SERIAL_DEBUG_OTHER | |
1703 | printk("cy_set_termios %s\n", tty->name); | |
1704 | #endif | |
1705 | ||
1706 | if (tty->termios->c_cflag == old_termios->c_cflag) | |
1707 | return; | |
1708 | config_setup(info); | |
1709 | ||
1710 | if ((old_termios->c_cflag & CRTSCTS) && | |
1711 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1712 | tty->stopped = 0; | |
1713 | cy_start(tty); | |
1714 | } | |
1715 | #ifdef tytso_patch_94Nov25_1726 | |
1716 | if (!(old_termios->c_cflag & CLOCAL) && | |
1717 | (tty->termios->c_cflag & CLOCAL)) | |
1718 | wake_up_interruptible(&info->open_wait); | |
1719 | #endif | |
1720 | ||
1721 | return; | |
1722 | } /* cy_set_termios */ | |
1723 | ||
1724 | ||
1725 | static void | |
1726 | cy_close(struct tty_struct * tty, struct file * filp) | |
1727 | { | |
1728 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1729 | ||
1730 | /* CP('C'); */ | |
1731 | #ifdef SERIAL_DEBUG_OTHER | |
1732 | printk("cy_close %s\n", tty->name); | |
1733 | #endif | |
1734 | ||
1735 | if (!info | |
1736 | || serial_paranoia_check(info, tty->name, "cy_close")){ | |
1737 | return; | |
1738 | } | |
1739 | #ifdef SERIAL_DEBUG_OPEN | |
1740 | printk("cy_close %s, count = %d\n", tty->name, info->count); | |
1741 | #endif | |
1742 | ||
1743 | if ((tty->count == 1) && (info->count != 1)) { | |
1744 | /* | |
1745 | * Uh, oh. tty->count is 1, which means that the tty | |
1746 | * structure will be freed. Info->count should always | |
1747 | * be one in these conditions. If it's greater than | |
1748 | * one, we've got real problems, since it means the | |
1749 | * serial port won't be shutdown. | |
1750 | */ | |
1751 | printk("cy_close: bad serial port count; tty->count is 1, " | |
1752 | "info->count is %d\n", info->count); | |
1753 | info->count = 1; | |
1754 | } | |
1755 | #ifdef SERIAL_DEBUG_COUNT | |
1756 | printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count - 1); | |
1757 | #endif | |
1758 | if (--info->count < 0) { | |
1759 | printk("cy_close: bad serial port count for ttys%d: %d\n", | |
1760 | info->line, info->count); | |
1761 | #ifdef SERIAL_DEBUG_COUNT | |
1762 | printk("cyc: %d: setting count to 0\n", __LINE__); | |
1763 | #endif | |
1764 | info->count = 0; | |
1765 | } | |
1766 | if (info->count) | |
1767 | return; | |
1768 | info->flags |= ASYNC_CLOSING; | |
1769 | if (info->flags & ASYNC_INITIALIZED) | |
1770 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ | |
1771 | shutdown(info); | |
1772 | if (tty->driver->flush_buffer) | |
1773 | tty->driver->flush_buffer(tty); | |
1774 | tty_ldisc_flush(tty); | |
1775 | info->event = 0; | |
e5a301ee | 1776 | info->tty = NULL; |
1da177e4 LT |
1777 | if (info->blocked_open) { |
1778 | if (info->close_delay) { | |
1779 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); | |
1780 | } | |
1781 | wake_up_interruptible(&info->open_wait); | |
1782 | } | |
1783 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1784 | wake_up_interruptible(&info->close_wait); | |
1785 | ||
1786 | #ifdef SERIAL_DEBUG_OTHER | |
1787 | printk("cy_close done\n"); | |
1788 | #endif | |
1789 | ||
1790 | return; | |
1791 | } /* cy_close */ | |
1792 | ||
1793 | /* | |
1794 | * cy_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1795 | */ | |
1796 | void | |
1797 | cy_hangup(struct tty_struct *tty) | |
1798 | { | |
1799 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1800 | ||
1801 | #ifdef SERIAL_DEBUG_OTHER | |
1802 | printk("cy_hangup %s\n", tty->name); /* */ | |
1803 | #endif | |
1804 | ||
1805 | if (serial_paranoia_check(info, tty->name, "cy_hangup")) | |
1806 | return; | |
1807 | ||
1808 | shutdown(info); | |
1809 | #if 0 | |
1810 | info->event = 0; | |
1811 | info->count = 0; | |
1812 | #ifdef SERIAL_DEBUG_COUNT | |
1813 | printk("cyc: %d: setting count to 0\n", __LINE__); | |
1814 | #endif | |
1815 | info->tty = 0; | |
1816 | #endif | |
1817 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1818 | wake_up_interruptible(&info->open_wait); | |
1819 | } /* cy_hangup */ | |
1820 | ||
1821 | ||
1822 | ||
1823 | /* | |
1824 | * ------------------------------------------------------------ | |
1825 | * cy_open() and friends | |
1826 | * ------------------------------------------------------------ | |
1827 | */ | |
1828 | ||
1829 | static int | |
1830 | block_til_ready(struct tty_struct *tty, struct file * filp, | |
1831 | struct cyclades_port *info) | |
1832 | { | |
1833 | DECLARE_WAITQUEUE(wait, current); | |
1834 | unsigned long flags; | |
1835 | int channel; | |
1836 | int retval; | |
1837 | volatile u_char *base_addr = (u_char *)BASE_ADDR; | |
1838 | ||
1839 | /* | |
1840 | * If the device is in the middle of being closed, then block | |
1841 | * until it's done, and then try again. | |
1842 | */ | |
1843 | if (info->flags & ASYNC_CLOSING) { | |
1844 | interruptible_sleep_on(&info->close_wait); | |
1845 | if (info->flags & ASYNC_HUP_NOTIFY){ | |
1846 | return -EAGAIN; | |
1847 | }else{ | |
1848 | return -ERESTARTSYS; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * If non-blocking mode is set, then make the check up front | |
1854 | * and then exit. | |
1855 | */ | |
1856 | if (filp->f_flags & O_NONBLOCK) { | |
1857 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1858 | return 0; | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * Block waiting for the carrier detect and the line to become | |
1863 | * free (i.e., not in use by the callout). While we are in | |
1864 | * this loop, info->count is dropped by one, so that | |
1865 | * cy_close() knows when to free things. We restore it upon | |
1866 | * exit, either normal or abnormal. | |
1867 | */ | |
1868 | retval = 0; | |
1869 | add_wait_queue(&info->open_wait, &wait); | |
1870 | #ifdef SERIAL_DEBUG_OPEN | |
1871 | printk("block_til_ready before block: %s, count = %d\n", | |
1872 | tty->name, info->count);/**/ | |
1873 | #endif | |
1874 | info->count--; | |
1875 | #ifdef SERIAL_DEBUG_COUNT | |
1876 | printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count); | |
1877 | #endif | |
1878 | info->blocked_open++; | |
1879 | ||
1880 | channel = info->line; | |
1881 | ||
1882 | while (1) { | |
1883 | local_irq_save(flags); | |
1884 | base_addr[CyCAR] = (u_char)channel; | |
1885 | base_addr[CyMSVR1] = CyRTS; | |
1886 | /* CP('S');CP('4'); */ | |
1887 | base_addr[CyMSVR2] = CyDTR; | |
1888 | #ifdef SERIAL_DEBUG_DTR | |
1889 | printk("cyc: %d: raising DTR\n", __LINE__); | |
1890 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1891 | #endif | |
1892 | local_irq_restore(flags); | |
1893 | set_current_state(TASK_INTERRUPTIBLE); | |
1894 | if (tty_hung_up_p(filp) | |
1895 | || !(info->flags & ASYNC_INITIALIZED) ){ | |
1896 | if (info->flags & ASYNC_HUP_NOTIFY) { | |
1897 | retval = -EAGAIN; | |
1898 | }else{ | |
1899 | retval = -ERESTARTSYS; | |
1900 | } | |
1901 | break; | |
1902 | } | |
1903 | local_irq_save(flags); | |
1904 | base_addr[CyCAR] = (u_char)channel; | |
1905 | /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */ | |
1906 | if (!(info->flags & ASYNC_CLOSING) | |
1907 | && (C_CLOCAL(tty) | |
1908 | || (base_addr[CyMSVR1] & CyDCD))) { | |
1909 | local_irq_restore(flags); | |
1910 | break; | |
1911 | } | |
1912 | local_irq_restore(flags); | |
1913 | if (signal_pending(current)) { | |
1914 | retval = -ERESTARTSYS; | |
1915 | break; | |
1916 | } | |
1917 | #ifdef SERIAL_DEBUG_OPEN | |
1918 | printk("block_til_ready blocking: %s, count = %d\n", | |
1919 | tty->name, info->count);/**/ | |
1920 | #endif | |
1921 | schedule(); | |
1922 | } | |
1923 | current->state = TASK_RUNNING; | |
1924 | remove_wait_queue(&info->open_wait, &wait); | |
1925 | if (!tty_hung_up_p(filp)){ | |
1926 | info->count++; | |
1927 | #ifdef SERIAL_DEBUG_COUNT | |
1928 | printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); | |
1929 | #endif | |
1930 | } | |
1931 | info->blocked_open--; | |
1932 | #ifdef SERIAL_DEBUG_OPEN | |
1933 | printk("block_til_ready after blocking: %s, count = %d\n", | |
1934 | tty->name, info->count);/**/ | |
1935 | #endif | |
1936 | if (retval) | |
1937 | return retval; | |
1938 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1939 | return 0; | |
1940 | } /* block_til_ready */ | |
1941 | ||
1942 | /* | |
1943 | * This routine is called whenever a serial port is opened. It | |
1944 | * performs the serial-specific initialization for the tty structure. | |
1945 | */ | |
1946 | int | |
1947 | cy_open(struct tty_struct *tty, struct file * filp) | |
1948 | { | |
1949 | struct cyclades_port *info; | |
1950 | int retval, line; | |
1951 | ||
1952 | /* CP('O'); */ | |
1953 | line = tty->index; | |
1954 | if ((line < 0) || (NR_PORTS <= line)){ | |
1955 | return -ENODEV; | |
1956 | } | |
1957 | info = &cy_port[line]; | |
1958 | if (info->line < 0){ | |
1959 | return -ENODEV; | |
1960 | } | |
1961 | #ifdef SERIAL_DEBUG_OTHER | |
1962 | printk("cy_open %s\n", tty->name); /* */ | |
1963 | #endif | |
1964 | if (serial_paranoia_check(info, tty->name, "cy_open")){ | |
1965 | return -ENODEV; | |
1966 | } | |
1967 | #ifdef SERIAL_DEBUG_OPEN | |
1968 | printk("cy_open %s, count = %d\n", tty->name, info->count);/**/ | |
1969 | #endif | |
1970 | info->count++; | |
1971 | #ifdef SERIAL_DEBUG_COUNT | |
1972 | printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); | |
1973 | #endif | |
1974 | tty->driver_data = info; | |
1975 | info->tty = tty; | |
1976 | ||
1da177e4 LT |
1977 | /* |
1978 | * Start up serial port | |
1979 | */ | |
1980 | retval = startup(info); | |
1981 | if (retval){ | |
1982 | return retval; | |
1983 | } | |
1984 | ||
1985 | retval = block_til_ready(tty, filp, info); | |
1986 | if (retval) { | |
1987 | #ifdef SERIAL_DEBUG_OPEN | |
1988 | printk("cy_open returning after block_til_ready with %d\n", | |
1989 | retval); | |
1990 | #endif | |
1991 | return retval; | |
1992 | } | |
1993 | ||
1994 | #ifdef SERIAL_DEBUG_OPEN | |
1995 | printk("cy_open done\n");/**/ | |
1996 | #endif | |
1997 | return 0; | |
1998 | } /* cy_open */ | |
1999 | ||
2000 | ||
2001 | ||
2002 | /* | |
2003 | * --------------------------------------------------------------------- | |
2004 | * serial167_init() and friends | |
2005 | * | |
2006 | * serial167_init() is called at boot-time to initialize the serial driver. | |
2007 | * --------------------------------------------------------------------- | |
2008 | */ | |
2009 | ||
2010 | /* | |
2011 | * This routine prints out the appropriate serial driver version | |
2012 | * number, and identifies which options were configured into this | |
2013 | * driver. | |
2014 | */ | |
2015 | static void | |
2016 | show_version(void) | |
2017 | { | |
2018 | printk("MVME166/167 cd2401 driver\n"); | |
2019 | } /* show_version */ | |
2020 | ||
2021 | /* initialize chips on card -- return number of valid | |
2022 | chips (which is number of ports/4) */ | |
2023 | ||
2024 | /* | |
2025 | * This initialises the hardware to a reasonable state. It should | |
2026 | * probe the chip first so as to copy 166-Bug setup as a default for | |
2027 | * port 0. It initialises CMR to CyASYNC; that is never done again, so | |
2028 | * as to limit the number of CyINIT_CHAN commands in normal running. | |
2029 | * | |
2030 | * ... I wonder what I should do if this fails ... | |
2031 | */ | |
2032 | ||
2033 | void | |
2034 | mvme167_serial_console_setup(int cflag) | |
2035 | { | |
2036 | volatile unsigned char* base_addr = (u_char *)BASE_ADDR; | |
2037 | int ch; | |
2038 | u_char spd; | |
2039 | u_char rcor, rbpr, badspeed = 0; | |
2040 | unsigned long flags; | |
2041 | ||
2042 | local_irq_save(flags); | |
2043 | ||
2044 | /* | |
2045 | * First probe channel zero of the chip, to see what speed has | |
2046 | * been selected. | |
2047 | */ | |
2048 | ||
2049 | base_addr[CyCAR] = 0; | |
2050 | ||
2051 | rcor = base_addr[CyRCOR] << 5; | |
2052 | rbpr = base_addr[CyRBPR]; | |
2053 | ||
2054 | for (spd = 0; spd < sizeof(baud_bpr); spd++) | |
2055 | if (rbpr == baud_bpr[spd] && rcor == baud_co[spd]) | |
2056 | break; | |
2057 | if (spd >= sizeof(baud_bpr)) { | |
2058 | spd = 14; /* 19200 */ | |
2059 | badspeed = 1; /* Failed to identify speed */ | |
2060 | } | |
2061 | initial_console_speed = spd; | |
2062 | ||
2063 | /* OK, we have chosen a speed, now reset and reinitialise */ | |
2064 | ||
2065 | my_udelay(20000L); /* Allow time for any active o/p to complete */ | |
2066 | if(base_addr[CyCCR] != 0x00){ | |
2067 | local_irq_restore(flags); | |
2068 | /* printk(" chip is never idle (CCR != 0)\n"); */ | |
2069 | return; | |
2070 | } | |
2071 | ||
2072 | base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */ | |
2073 | my_udelay(1000L); | |
2074 | ||
2075 | if(base_addr[CyGFRCR] == 0x00){ | |
2076 | local_irq_restore(flags); | |
2077 | /* printk(" chip is not responding (GFRCR stayed 0)\n"); */ | |
2078 | return; | |
2079 | } | |
2080 | ||
2081 | /* | |
2082 | * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms | |
2083 | * tick | |
2084 | */ | |
2085 | ||
2086 | base_addr[CyTPR] = 10; | |
2087 | ||
2088 | base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */ | |
2089 | base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */ | |
2090 | base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */ | |
2091 | ||
2092 | /* | |
2093 | * Attempt to set up all channels to something reasonable, and | |
2094 | * bang out a INIT_CHAN command. We should then be able to limit | |
2095 | * the ammount of fiddling we have to do in normal running. | |
2096 | */ | |
2097 | ||
2098 | for (ch = 3; ch >= 0 ; ch--) { | |
2099 | base_addr[CyCAR] = (u_char)ch; | |
2100 | base_addr[CyIER] = 0; | |
2101 | base_addr[CyCMR] = CyASYNC; | |
2102 | base_addr[CyLICR] = (u_char)ch << 2; | |
2103 | base_addr[CyLIVR] = 0x5c; | |
2104 | base_addr[CyTCOR] = baud_co[spd]; | |
2105 | base_addr[CyTBPR] = baud_bpr[spd]; | |
2106 | base_addr[CyRCOR] = baud_co[spd] >> 5; | |
2107 | base_addr[CyRBPR] = baud_bpr[spd]; | |
2108 | base_addr[CySCHR1] = 'Q' & 0x1f; | |
2109 | base_addr[CySCHR2] = 'X' & 0x1f; | |
2110 | base_addr[CySCRL] = 0; | |
2111 | base_addr[CySCRH] = 0; | |
2112 | base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE; | |
2113 | base_addr[CyCOR2] = 0; | |
2114 | base_addr[CyCOR3] = Cy_1_STOP; | |
2115 | base_addr[CyCOR4] = baud_cor4[spd]; | |
2116 | base_addr[CyCOR5] = 0; | |
2117 | base_addr[CyCOR6] = 0; | |
2118 | base_addr[CyCOR7] = 0; | |
2119 | base_addr[CyRTPRL] = 2; | |
2120 | base_addr[CyRTPRH] = 0; | |
2121 | base_addr[CyMSVR1] = 0; | |
2122 | base_addr[CyMSVR2] = 0; | |
2123 | write_cy_cmd(base_addr,CyINIT_CHAN|CyDIS_RCVR|CyDIS_XMTR); | |
2124 | } | |
2125 | ||
2126 | /* | |
2127 | * Now do specials for channel zero.... | |
2128 | */ | |
2129 | ||
2130 | base_addr[CyMSVR1] = CyRTS; | |
2131 | base_addr[CyMSVR2] = CyDTR; | |
2132 | base_addr[CyIER] = CyRxData; | |
2133 | write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR); | |
2134 | ||
2135 | local_irq_restore(flags); | |
2136 | ||
2137 | my_udelay(20000L); /* Let it all settle down */ | |
2138 | ||
2139 | printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]); | |
2140 | if (badspeed) | |
2141 | printk(" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n", | |
2142 | rcor >> 5, rbpr); | |
2143 | } /* serial_console_init */ | |
2144 | ||
b68e31d0 | 2145 | static const struct tty_operations cy_ops = { |
1da177e4 LT |
2146 | .open = cy_open, |
2147 | .close = cy_close, | |
2148 | .write = cy_write, | |
2149 | .put_char = cy_put_char, | |
2150 | .flush_chars = cy_flush_chars, | |
2151 | .write_room = cy_write_room, | |
2152 | .chars_in_buffer = cy_chars_in_buffer, | |
2153 | .flush_buffer = cy_flush_buffer, | |
2154 | .ioctl = cy_ioctl, | |
2155 | .throttle = cy_throttle, | |
2156 | .unthrottle = cy_unthrottle, | |
2157 | .set_termios = cy_set_termios, | |
2158 | .stop = cy_stop, | |
2159 | .start = cy_start, | |
2160 | .hangup = cy_hangup, | |
2161 | .tiocmget = cy_tiocmget, | |
2162 | .tiocmset = cy_tiocmset, | |
2163 | }; | |
2164 | /* The serial driver boot-time initialization code! | |
2165 | Hardware I/O ports are mapped to character special devices on a | |
2166 | first found, first allocated manner. That is, this code searches | |
2167 | for Cyclom cards in the system. As each is found, it is probed | |
2168 | to discover how many chips (and thus how many ports) are present. | |
2169 | These ports are mapped to the tty ports 64 and upward in monotonic | |
2170 | fashion. If an 8-port card is replaced with a 16-port card, the | |
2171 | port mapping on a following card will shift. | |
2172 | ||
2173 | This approach is different from what is used in the other serial | |
2174 | device driver because the Cyclom is more properly a multiplexer, | |
2175 | not just an aggregation of serial ports on one card. | |
2176 | ||
2177 | If there are more cards with more ports than have been statically | |
2178 | allocated above, a warning is printed and the extra ports are ignored. | |
2179 | */ | |
2180 | static int __init | |
2181 | serial167_init(void) | |
2182 | { | |
2183 | struct cyclades_port *info; | |
2184 | int ret = 0; | |
2185 | int good_ports = 0; | |
2186 | int port_num = 0; | |
2187 | int index; | |
2188 | int DefSpeed; | |
2189 | #ifdef notyet | |
2190 | struct sigaction sa; | |
2191 | #endif | |
2192 | ||
2193 | if (!(mvme16x_config &MVME16x_CONFIG_GOT_CD2401)) | |
2194 | return 0; | |
2195 | ||
2196 | cy_serial_driver = alloc_tty_driver(NR_PORTS); | |
2197 | if (!cy_serial_driver) | |
2198 | return -ENOMEM; | |
2199 | ||
2200 | #if 0 | |
2201 | scrn[1] = '\0'; | |
2202 | #endif | |
2203 | ||
2204 | show_version(); | |
2205 | ||
2206 | /* Has "console=0,9600n8" been used in bootinfo to change speed? */ | |
2207 | if (serial_console_cflag) | |
2208 | DefSpeed = serial_console_cflag & 0017; | |
2209 | else { | |
2210 | DefSpeed = initial_console_speed; | |
2211 | serial_console_info = &cy_port[0]; | |
2212 | serial_console_cflag = DefSpeed | CS8; | |
2213 | #if 0 | |
2214 | serial_console = 64; /*callout_driver.minor_start*/ | |
2215 | #endif | |
2216 | } | |
2217 | ||
2218 | /* Initialize the tty_driver structure */ | |
2219 | ||
2220 | cy_serial_driver->owner = THIS_MODULE; | |
1da177e4 LT |
2221 | cy_serial_driver->name = "ttyS"; |
2222 | cy_serial_driver->major = TTY_MAJOR; | |
2223 | cy_serial_driver->minor_start = 64; | |
2224 | cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2225 | cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
2226 | cy_serial_driver->init_termios = tty_std_termios; | |
2227 | cy_serial_driver->init_termios.c_cflag = | |
2228 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2229 | cy_serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
2230 | tty_set_operations(cy_serial_driver, &cy_ops); | |
2231 | ||
2232 | ret = tty_register_driver(cy_serial_driver); | |
2233 | if (ret) { | |
2234 | printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n"); | |
2235 | put_tty_driver(cy_serial_driver); | |
2236 | return ret; | |
2237 | } | |
2238 | ||
2239 | port_num = 0; | |
2240 | info = cy_port; | |
2241 | for (index = 0; index < 1; index++) { | |
2242 | ||
2243 | good_ports = 4; | |
2244 | ||
2245 | if(port_num < NR_PORTS){ | |
2246 | while( good_ports-- && port_num < NR_PORTS){ | |
2247 | /*** initialize port ***/ | |
2248 | info->magic = CYCLADES_MAGIC; | |
2249 | info->type = PORT_CIRRUS; | |
2250 | info->card = index; | |
2251 | info->line = port_num; | |
2252 | info->flags = STD_COM_FLAGS; | |
e5a301ee | 2253 | info->tty = NULL; |
1da177e4 LT |
2254 | info->xmit_fifo_size = 12; |
2255 | info->cor1 = CyPARITY_NONE|Cy_8_BITS; | |
2256 | info->cor2 = CyETC; | |
2257 | info->cor3 = Cy_1_STOP; | |
2258 | info->cor4 = 0x08; /* _very_ small receive threshold */ | |
2259 | info->cor5 = 0; | |
2260 | info->cor6 = 0; | |
2261 | info->cor7 = 0; | |
2262 | info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */ | |
2263 | info->tco = baud_co[DefSpeed]; /* Tx CO */ | |
2264 | info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */ | |
2265 | info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */ | |
2266 | info->close_delay = 0; | |
2267 | info->x_char = 0; | |
2268 | info->event = 0; | |
2269 | info->count = 0; | |
2270 | #ifdef SERIAL_DEBUG_COUNT | |
2271 | printk("cyc: %d: setting count to 0\n", __LINE__); | |
2272 | #endif | |
2273 | info->blocked_open = 0; | |
2274 | info->default_threshold = 0; | |
2275 | info->default_timeout = 0; | |
3e577a80 | 2276 | INIT_WORK(&info->tqueue, do_softint); |
1da177e4 LT |
2277 | init_waitqueue_head(&info->open_wait); |
2278 | init_waitqueue_head(&info->close_wait); | |
2279 | /* info->session */ | |
2280 | /* info->pgrp */ | |
2281 | /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/ | |
2282 | info->read_status_mask = CyTIMEOUT| CySPECHAR| CyBREAK | |
2283 | | CyPARITY| CyFRAME| CyOVERRUN; | |
2284 | /* info->timeout */ | |
2285 | ||
2286 | printk("ttyS%d ", info->line); | |
2287 | port_num++;info++; | |
2288 | if(!(port_num & 7)){ | |
2289 | printk("\n "); | |
2290 | } | |
2291 | } | |
2292 | } | |
2293 | printk("\n"); | |
2294 | } | |
2295 | while( port_num < NR_PORTS){ | |
2296 | info->line = -1; | |
2297 | port_num++;info++; | |
2298 | } | |
2299 | #ifdef CONFIG_REMOTE_DEBUG | |
2300 | debug_setup(); | |
2301 | #endif | |
2302 | ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0, | |
2303 | "cd2401_errors", cd2401_rxerr_interrupt); | |
2304 | if (ret) { | |
2305 | printk(KERN_ERR "Could't get cd2401_errors IRQ"); | |
2306 | goto cleanup_serial_driver; | |
2307 | } | |
2308 | ||
2309 | ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0, | |
2310 | "cd2401_modem", cd2401_modem_interrupt); | |
2311 | if (ret) { | |
2312 | printk(KERN_ERR "Could't get cd2401_modem IRQ"); | |
2313 | goto cleanup_irq_cd2401_errors; | |
2314 | } | |
2315 | ||
2316 | ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0, | |
2317 | "cd2401_txints", cd2401_tx_interrupt); | |
2318 | if (ret) { | |
2319 | printk(KERN_ERR "Could't get cd2401_txints IRQ"); | |
2320 | goto cleanup_irq_cd2401_modem; | |
2321 | } | |
2322 | ||
2323 | ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0, | |
2324 | "cd2401_rxints", cd2401_rx_interrupt); | |
2325 | if (ret) { | |
2326 | printk(KERN_ERR "Could't get cd2401_rxints IRQ"); | |
2327 | goto cleanup_irq_cd2401_txints; | |
2328 | } | |
2329 | ||
2330 | /* Now we have registered the interrupt handlers, allow the interrupts */ | |
2331 | ||
2332 | pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */ | |
2333 | pcc2chip[PccSCCTICR] = 0x15; | |
2334 | pcc2chip[PccSCCRICR] = 0x15; | |
2335 | ||
2336 | pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */ | |
2337 | ||
2338 | return 0; | |
2339 | cleanup_irq_cd2401_txints: | |
2340 | free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt); | |
2341 | cleanup_irq_cd2401_modem: | |
2342 | free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt); | |
2343 | cleanup_irq_cd2401_errors: | |
2344 | free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt); | |
2345 | cleanup_serial_driver: | |
2346 | if (tty_unregister_driver(cy_serial_driver)) | |
2347 | printk(KERN_ERR "Couldn't unregister MVME166/7 serial driver\n"); | |
2348 | put_tty_driver(cy_serial_driver); | |
2349 | return ret; | |
2350 | } /* serial167_init */ | |
2351 | ||
2352 | module_init(serial167_init); | |
2353 | ||
2354 | ||
2355 | #ifdef CYCLOM_SHOW_STATUS | |
2356 | static void | |
2357 | show_status(int line_num) | |
2358 | { | |
2359 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2360 | int channel; | |
2361 | struct cyclades_port * info; | |
2362 | unsigned long flags; | |
2363 | ||
2364 | info = &cy_port[line_num]; | |
2365 | channel = info->line; | |
2366 | printk(" channel %d\n", channel);/**/ | |
2367 | ||
2368 | printk(" cy_port\n"); | |
2369 | printk(" card line flags = %d %d %x\n", | |
2370 | info->card, info->line, info->flags); | |
2371 | printk(" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n", | |
2372 | (long)info->tty, info->read_status_mask, | |
2373 | info->timeout, info->xmit_fifo_size); | |
2374 | printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n", | |
2375 | info->cor1, info->cor2, info->cor3, info->cor4, info->cor5, | |
2376 | info->cor6, info->cor7); | |
2377 | printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", | |
2378 | info->tbpr, info->tco, info->rbpr, info->rco); | |
2379 | printk(" close_delay event count = %d %d %d\n", | |
2380 | info->close_delay, info->event, info->count); | |
2381 | printk(" x_char blocked_open = %x %x\n", | |
2382 | info->x_char, info->blocked_open); | |
2383 | printk(" open_wait = %lx %lx %lx\n", | |
2384 | (long)info->open_wait); | |
2385 | ||
2386 | ||
2387 | local_irq_save(flags); | |
2388 | ||
2389 | /* Global Registers */ | |
2390 | ||
2391 | printk(" CyGFRCR %x\n", base_addr[CyGFRCR]); | |
2392 | printk(" CyCAR %x\n", base_addr[CyCAR]); | |
2393 | printk(" CyRISR %x\n", base_addr[CyRISR]); | |
2394 | printk(" CyTISR %x\n", base_addr[CyTISR]); | |
2395 | printk(" CyMISR %x\n", base_addr[CyMISR]); | |
2396 | printk(" CyRIR %x\n", base_addr[CyRIR]); | |
2397 | printk(" CyTIR %x\n", base_addr[CyTIR]); | |
2398 | printk(" CyMIR %x\n", base_addr[CyMIR]); | |
2399 | printk(" CyTPR %x\n", base_addr[CyTPR]); | |
2400 | ||
2401 | base_addr[CyCAR] = (u_char)channel; | |
2402 | ||
2403 | /* Virtual Registers */ | |
2404 | ||
2405 | #if 0 | |
2406 | printk(" CyRIVR %x\n", base_addr[CyRIVR]); | |
2407 | printk(" CyTIVR %x\n", base_addr[CyTIVR]); | |
2408 | printk(" CyMIVR %x\n", base_addr[CyMIVR]); | |
2409 | printk(" CyMISR %x\n", base_addr[CyMISR]); | |
2410 | #endif | |
2411 | ||
2412 | /* Channel Registers */ | |
2413 | ||
2414 | printk(" CyCCR %x\n", base_addr[CyCCR]); | |
2415 | printk(" CyIER %x\n", base_addr[CyIER]); | |
2416 | printk(" CyCOR1 %x\n", base_addr[CyCOR1]); | |
2417 | printk(" CyCOR2 %x\n", base_addr[CyCOR2]); | |
2418 | printk(" CyCOR3 %x\n", base_addr[CyCOR3]); | |
2419 | printk(" CyCOR4 %x\n", base_addr[CyCOR4]); | |
2420 | printk(" CyCOR5 %x\n", base_addr[CyCOR5]); | |
2421 | #if 0 | |
2422 | printk(" CyCCSR %x\n", base_addr[CyCCSR]); | |
2423 | printk(" CyRDCR %x\n", base_addr[CyRDCR]); | |
2424 | #endif | |
2425 | printk(" CySCHR1 %x\n", base_addr[CySCHR1]); | |
2426 | printk(" CySCHR2 %x\n", base_addr[CySCHR2]); | |
2427 | #if 0 | |
2428 | printk(" CySCHR3 %x\n", base_addr[CySCHR3]); | |
2429 | printk(" CySCHR4 %x\n", base_addr[CySCHR4]); | |
2430 | printk(" CySCRL %x\n", base_addr[CySCRL]); | |
2431 | printk(" CySCRH %x\n", base_addr[CySCRH]); | |
2432 | printk(" CyLNC %x\n", base_addr[CyLNC]); | |
2433 | printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]); | |
2434 | printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]); | |
2435 | #endif | |
2436 | printk(" CyRTPRL %x\n", base_addr[CyRTPRL]); | |
2437 | printk(" CyRTPRH %x\n", base_addr[CyRTPRH]); | |
2438 | printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]); | |
2439 | printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]); | |
2440 | printk(" CyRBPR %x\n", base_addr[CyRBPR]); | |
2441 | printk(" CyRCOR %x\n", base_addr[CyRCOR]); | |
2442 | printk(" CyTBPR %x\n", base_addr[CyTBPR]); | |
2443 | printk(" CyTCOR %x\n", base_addr[CyTCOR]); | |
2444 | ||
2445 | local_irq_restore(flags); | |
2446 | } /* show_status */ | |
2447 | #endif | |
2448 | ||
2449 | ||
2450 | #if 0 | |
2451 | /* Dummy routine in mvme16x/config.c for now */ | |
2452 | ||
2453 | /* Serial console setup. Called from linux/init/main.c */ | |
2454 | ||
2455 | void console_setup(char *str, int *ints) | |
2456 | { | |
2457 | char *s; | |
2458 | int baud, bits, parity; | |
2459 | int cflag = 0; | |
2460 | ||
2461 | /* Sanity check. */ | |
2462 | if (ints[0] > 3 || ints[1] > 3) return; | |
2463 | ||
2464 | /* Get baud, bits and parity */ | |
2465 | baud = 2400; | |
2466 | bits = 8; | |
2467 | parity = 'n'; | |
2468 | if (ints[2]) baud = ints[2]; | |
2469 | if ((s = strchr(str, ','))) { | |
2470 | do { | |
2471 | s++; | |
2472 | } while(*s >= '0' && *s <= '9'); | |
2473 | if (*s) parity = *s++; | |
2474 | if (*s) bits = *s - '0'; | |
2475 | } | |
2476 | ||
2477 | /* Now construct a cflag setting. */ | |
2478 | switch(baud) { | |
2479 | case 1200: | |
2480 | cflag |= B1200; | |
2481 | break; | |
2482 | case 9600: | |
2483 | cflag |= B9600; | |
2484 | break; | |
2485 | case 19200: | |
2486 | cflag |= B19200; | |
2487 | break; | |
2488 | case 38400: | |
2489 | cflag |= B38400; | |
2490 | break; | |
2491 | case 2400: | |
2492 | default: | |
2493 | cflag |= B2400; | |
2494 | break; | |
2495 | } | |
2496 | switch(bits) { | |
2497 | case 7: | |
2498 | cflag |= CS7; | |
2499 | break; | |
2500 | default: | |
2501 | case 8: | |
2502 | cflag |= CS8; | |
2503 | break; | |
2504 | } | |
2505 | switch(parity) { | |
2506 | case 'o': case 'O': | |
2507 | cflag |= PARODD; | |
2508 | break; | |
2509 | case 'e': case 'E': | |
2510 | cflag |= PARENB; | |
2511 | break; | |
2512 | } | |
2513 | ||
2514 | serial_console_info = &cy_port[ints[1]]; | |
2515 | serial_console_cflag = cflag; | |
2516 | serial_console = ints[1] + 64; /*callout_driver.minor_start*/ | |
2517 | } | |
2518 | #endif | |
2519 | ||
2520 | /* | |
2521 | * The following is probably out of date for 2.1.x serial console stuff. | |
2522 | * | |
2523 | * The console is registered early on from arch/m68k/kernel/setup.c, and | |
2524 | * it therefore relies on the chip being setup correctly by 166-Bug. This | |
2525 | * seems reasonable, as the serial port has been used to invoke the system | |
2526 | * boot. It also means that this function must not rely on any data | |
2527 | * initialisation performed by serial167_init() etc. | |
2528 | * | |
2529 | * Of course, once the console has been registered, we had better ensure | |
2530 | * that serial167_init() doesn't leave the chip non-functional. | |
2531 | * | |
2532 | * The console must be locked when we get here. | |
2533 | */ | |
2534 | ||
2535 | void serial167_console_write(struct console *co, const char *str, unsigned count) | |
2536 | { | |
2537 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2538 | unsigned long flags; | |
2539 | volatile u_char sink; | |
2540 | u_char ier; | |
2541 | int port; | |
2542 | u_char do_lf = 0; | |
2543 | int i = 0; | |
2544 | ||
2545 | local_irq_save(flags); | |
2546 | ||
2547 | /* Ensure transmitter is enabled! */ | |
2548 | ||
2549 | port = 0; | |
2550 | base_addr[CyCAR] = (u_char)port; | |
2551 | while (base_addr[CyCCR]) | |
2552 | ; | |
2553 | base_addr[CyCCR] = CyENB_XMTR; | |
2554 | ||
2555 | ier = base_addr[CyIER]; | |
2556 | base_addr[CyIER] = CyTxMpty; | |
2557 | ||
2558 | while (1) { | |
2559 | if (pcc2chip[PccSCCTICR] & 0x20) | |
2560 | { | |
2561 | /* We have a Tx int. Acknowledge it */ | |
2562 | sink = pcc2chip[PccTPIACKR]; | |
2563 | if ((base_addr[CyLICR] >> 2) == port) { | |
2564 | if (i == count) { | |
2565 | /* Last char of string is now output */ | |
2566 | base_addr[CyTEOIR] = CyNOTRANS; | |
2567 | break; | |
2568 | } | |
2569 | if (do_lf) { | |
2570 | base_addr[CyTDR] = '\n'; | |
2571 | str++; | |
2572 | i++; | |
2573 | do_lf = 0; | |
2574 | } | |
2575 | else if (*str == '\n') { | |
2576 | base_addr[CyTDR] = '\r'; | |
2577 | do_lf = 1; | |
2578 | } | |
2579 | else { | |
2580 | base_addr[CyTDR] = *str++; | |
2581 | i++; | |
2582 | } | |
2583 | base_addr[CyTEOIR] = 0; | |
2584 | } | |
2585 | else | |
2586 | base_addr[CyTEOIR] = CyNOTRANS; | |
2587 | } | |
2588 | } | |
2589 | ||
2590 | base_addr[CyIER] = ier; | |
2591 | ||
2592 | local_irq_restore(flags); | |
2593 | } | |
2594 | ||
2595 | static struct tty_driver *serial167_console_device(struct console *c, int *index) | |
2596 | { | |
2597 | *index = c->index; | |
2598 | return cy_serial_driver; | |
2599 | } | |
2600 | ||
2601 | ||
2602 | static int __init serial167_console_setup(struct console *co, char *options) | |
2603 | { | |
2604 | return 0; | |
2605 | } | |
2606 | ||
2607 | ||
2608 | static struct console sercons = { | |
2609 | .name = "ttyS", | |
2610 | .write = serial167_console_write, | |
2611 | .device = serial167_console_device, | |
2612 | .setup = serial167_console_setup, | |
2613 | .flags = CON_PRINTBUFFER, | |
2614 | .index = -1, | |
2615 | }; | |
2616 | ||
2617 | ||
2618 | static int __init serial167_console_init(void) | |
2619 | { | |
2620 | if (vme_brdtype == VME_TYPE_MVME166 || | |
2621 | vme_brdtype == VME_TYPE_MVME167 || | |
2622 | vme_brdtype == VME_TYPE_MVME177) { | |
2623 | mvme167_serial_console_setup(0); | |
2624 | register_console(&sercons); | |
2625 | } | |
2626 | return 0; | |
2627 | } | |
2628 | console_initcall(serial167_console_init); | |
2629 | ||
2630 | #ifdef CONFIG_REMOTE_DEBUG | |
2631 | void putDebugChar (int c) | |
2632 | { | |
2633 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2634 | unsigned long flags; | |
2635 | volatile u_char sink; | |
2636 | u_char ier; | |
2637 | int port; | |
2638 | ||
2639 | local_irq_save(flags); | |
2640 | ||
2641 | /* Ensure transmitter is enabled! */ | |
2642 | ||
2643 | port = DEBUG_PORT; | |
2644 | base_addr[CyCAR] = (u_char)port; | |
2645 | while (base_addr[CyCCR]) | |
2646 | ; | |
2647 | base_addr[CyCCR] = CyENB_XMTR; | |
2648 | ||
2649 | ier = base_addr[CyIER]; | |
2650 | base_addr[CyIER] = CyTxMpty; | |
2651 | ||
2652 | while (1) { | |
2653 | if (pcc2chip[PccSCCTICR] & 0x20) | |
2654 | { | |
2655 | /* We have a Tx int. Acknowledge it */ | |
2656 | sink = pcc2chip[PccTPIACKR]; | |
2657 | if ((base_addr[CyLICR] >> 2) == port) { | |
2658 | base_addr[CyTDR] = c; | |
2659 | base_addr[CyTEOIR] = 0; | |
2660 | break; | |
2661 | } | |
2662 | else | |
2663 | base_addr[CyTEOIR] = CyNOTRANS; | |
2664 | } | |
2665 | } | |
2666 | ||
2667 | base_addr[CyIER] = ier; | |
2668 | ||
2669 | local_irq_restore(flags); | |
2670 | } | |
2671 | ||
2672 | int getDebugChar() | |
2673 | { | |
2674 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2675 | unsigned long flags; | |
2676 | volatile u_char sink; | |
2677 | u_char ier; | |
2678 | int port; | |
2679 | int i, c; | |
2680 | ||
2681 | i = debugiq.out; | |
2682 | if (i != debugiq.in) { | |
2683 | c = debugiq.buf[i]; | |
2684 | if (++i == DEBUG_LEN) | |
2685 | i = 0; | |
2686 | debugiq.out = i; | |
2687 | return c; | |
2688 | } | |
2689 | /* OK, nothing in queue, wait in poll loop */ | |
2690 | ||
2691 | local_irq_save(flags); | |
2692 | ||
2693 | /* Ensure receiver is enabled! */ | |
2694 | ||
2695 | port = DEBUG_PORT; | |
2696 | base_addr[CyCAR] = (u_char)port; | |
2697 | #if 0 | |
2698 | while (base_addr[CyCCR]) | |
2699 | ; | |
2700 | base_addr[CyCCR] = CyENB_RCVR; | |
2701 | #endif | |
2702 | ier = base_addr[CyIER]; | |
2703 | base_addr[CyIER] = CyRxData; | |
2704 | ||
2705 | while (1) { | |
2706 | if (pcc2chip[PccSCCRICR] & 0x20) | |
2707 | { | |
2708 | /* We have a Rx int. Acknowledge it */ | |
2709 | sink = pcc2chip[PccRPIACKR]; | |
2710 | if ((base_addr[CyLICR] >> 2) == port) { | |
2711 | int cnt = base_addr[CyRFOC]; | |
2712 | while (cnt-- > 0) | |
2713 | { | |
2714 | c = base_addr[CyRDR]; | |
2715 | if (c == 0) | |
2716 | printk ("!! debug char is null (cnt=%d) !!", cnt); | |
2717 | else | |
2718 | queueDebugChar (c); | |
2719 | } | |
2720 | base_addr[CyREOIR] = 0; | |
2721 | i = debugiq.out; | |
2722 | if (i == debugiq.in) | |
2723 | panic ("Debug input queue empty!"); | |
2724 | c = debugiq.buf[i]; | |
2725 | if (++i == DEBUG_LEN) | |
2726 | i = 0; | |
2727 | debugiq.out = i; | |
2728 | break; | |
2729 | } | |
2730 | else | |
2731 | base_addr[CyREOIR] = CyNOTRANS; | |
2732 | } | |
2733 | } | |
2734 | ||
2735 | base_addr[CyIER] = ier; | |
2736 | ||
2737 | local_irq_restore(flags); | |
2738 | ||
2739 | return (c); | |
2740 | } | |
2741 | ||
2742 | void queueDebugChar (int c) | |
2743 | { | |
2744 | int i; | |
2745 | ||
2746 | i = debugiq.in; | |
2747 | debugiq.buf[i] = c; | |
2748 | if (++i == DEBUG_LEN) | |
2749 | i = 0; | |
2750 | if (i != debugiq.out) | |
2751 | debugiq.in = i; | |
2752 | } | |
2753 | ||
2754 | static void | |
2755 | debug_setup() | |
2756 | { | |
2757 | unsigned long flags; | |
2758 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2759 | int i, cflag; | |
2760 | ||
2761 | cflag = B19200; | |
2762 | ||
2763 | local_irq_save(flags); | |
2764 | ||
2765 | for (i = 0; i < 4; i++) | |
2766 | { | |
2767 | base_addr[CyCAR] = i; | |
2768 | base_addr[CyLICR] = i << 2; | |
2769 | } | |
2770 | ||
2771 | debugiq.in = debugiq.out = 0; | |
2772 | ||
2773 | base_addr[CyCAR] = DEBUG_PORT; | |
2774 | ||
2775 | /* baud rate */ | |
2776 | i = cflag & CBAUD; | |
2777 | ||
2778 | base_addr[CyIER] = 0; | |
2779 | ||
2780 | base_addr[CyCMR] = CyASYNC; | |
2781 | base_addr[CyLICR] = DEBUG_PORT << 2; | |
2782 | base_addr[CyLIVR] = 0x5c; | |
2783 | ||
2784 | /* tx and rx baud rate */ | |
2785 | ||
2786 | base_addr[CyTCOR] = baud_co[i]; | |
2787 | base_addr[CyTBPR] = baud_bpr[i]; | |
2788 | base_addr[CyRCOR] = baud_co[i] >> 5; | |
2789 | base_addr[CyRBPR] = baud_bpr[i]; | |
2790 | ||
2791 | /* set line characteristics according configuration */ | |
2792 | ||
2793 | base_addr[CySCHR1] = 0; | |
2794 | base_addr[CySCHR2] = 0; | |
2795 | base_addr[CySCRL] = 0; | |
2796 | base_addr[CySCRH] = 0; | |
2797 | base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE; | |
2798 | base_addr[CyCOR2] = 0; | |
2799 | base_addr[CyCOR3] = Cy_1_STOP; | |
2800 | base_addr[CyCOR4] = baud_cor4[i]; | |
2801 | base_addr[CyCOR5] = 0; | |
2802 | base_addr[CyCOR6] = 0; | |
2803 | base_addr[CyCOR7] = 0; | |
2804 | ||
2805 | write_cy_cmd(base_addr,CyINIT_CHAN); | |
2806 | write_cy_cmd(base_addr,CyENB_RCVR); | |
2807 | ||
2808 | base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */ | |
2809 | ||
2810 | base_addr[CyRTPRL] = 2; | |
2811 | base_addr[CyRTPRH] = 0; | |
2812 | ||
2813 | base_addr[CyMSVR1] = CyRTS; | |
2814 | base_addr[CyMSVR2] = CyDTR; | |
2815 | ||
2816 | base_addr[CyIER] = CyRxData; | |
2817 | ||
2818 | local_irq_restore(flags); | |
2819 | ||
2820 | } /* debug_setup */ | |
2821 | ||
2822 | #endif | |
2823 | ||
2824 | MODULE_LICENSE("GPL"); |