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 | ||
47 | #include <linux/config.h> | |
48 | #include <linux/errno.h> | |
49 | #include <linux/signal.h> | |
50 | #include <linux/sched.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/tty.h> | |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/serial.h> | |
55 | #include <linux/serialP.h> | |
56 | #include <linux/string.h> | |
57 | #include <linux/fcntl.h> | |
58 | #include <linux/ptrace.h> | |
59 | #include <linux/serial167.h> | |
60 | #include <linux/delay.h> | |
61 | #include <linux/major.h> | |
62 | #include <linux/mm.h> | |
63 | #include <linux/console.h> | |
64 | #include <linux/module.h> | |
65 | #include <linux/bitops.h> | |
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 | }; | |
120 | #define NR_PORTS (sizeof(cy_port)/sizeof(struct cyclades_port)) | |
121 | ||
122 | /* | |
123 | * tmp_buf is used as a temporary buffer by serial_write. We need to | |
124 | * lock it in case the copy_from_user blocks while swapping in a page, | |
125 | * and some other program tries to do a serial write at the same time. | |
126 | * Since the lock will only come under contention when the system is | |
127 | * swapping and available memory is low, it makes sense to share one | |
128 | * buffer across all the serial ports, since it significantly saves | |
129 | * memory if large numbers of serial ports are open. | |
130 | */ | |
131 | static unsigned char *tmp_buf = 0; | |
132 | DECLARE_MUTEX(tmp_buf_sem); | |
133 | ||
134 | /* | |
135 | * This is used to look up the divisor speeds and the timeouts | |
136 | * We're normally limited to 15 distinct baud rates. The extra | |
137 | * are accessed via settings in info->flags. | |
138 | * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, | |
139 | * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, | |
140 | * HI VHI | |
141 | */ | |
142 | static int baud_table[] = { | |
143 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, | |
144 | 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000, | |
145 | 0}; | |
146 | ||
147 | #if 0 | |
148 | static char baud_co[] = { /* 25 MHz clock option table */ | |
149 | /* value => 00 01 02 03 04 */ | |
150 | /* divide by 8 32 128 512 2048 */ | |
151 | 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, | |
152 | 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
153 | ||
154 | static char baud_bpr[] = { /* 25 MHz baud rate period table */ | |
155 | 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, | |
156 | 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15}; | |
157 | #endif | |
158 | ||
159 | /* I think 166 brd clocks 2401 at 20MHz.... */ | |
160 | ||
161 | /* These values are written directly to tcor, and >> 5 for writing to rcor */ | |
162 | static u_char baud_co[] = { /* 20 MHz clock option table */ | |
163 | 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40, | |
164 | 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; | |
165 | ||
166 | /* These values written directly to tbpr/rbpr */ | |
167 | static u_char baud_bpr[] = { /* 20 MHz baud rate period table */ | |
168 | 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81, | |
169 | 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10}; | |
170 | ||
171 | static u_char baud_cor4[] = { /* receive threshold */ | |
172 | 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, | |
173 | 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07}; | |
174 | ||
175 | ||
176 | ||
177 | static void shutdown(struct cyclades_port *); | |
178 | static int startup (struct cyclades_port *); | |
179 | static void cy_throttle(struct tty_struct *); | |
180 | static void cy_unthrottle(struct tty_struct *); | |
181 | static void config_setup(struct cyclades_port *); | |
182 | extern void console_print(const char *); | |
183 | #ifdef CYCLOM_SHOW_STATUS | |
184 | static void show_status(int); | |
185 | #endif | |
186 | ||
187 | #ifdef CONFIG_REMOTE_DEBUG | |
188 | static void debug_setup(void); | |
189 | void queueDebugChar (int c); | |
190 | int getDebugChar(void); | |
191 | ||
192 | #define DEBUG_PORT 1 | |
193 | #define DEBUG_LEN 256 | |
194 | ||
195 | typedef struct { | |
196 | int in; | |
197 | int out; | |
198 | unsigned char buf[DEBUG_LEN]; | |
199 | } debugq; | |
200 | ||
201 | debugq debugiq; | |
202 | #endif | |
203 | ||
204 | /* | |
205 | * I have my own version of udelay(), as it is needed when initialising | |
206 | * the chip, before the delay loop has been calibrated. Should probably | |
207 | * reference one of the vmechip2 or pccchip2 counter for an accurate | |
208 | * delay, but this wild guess will do for now. | |
209 | */ | |
210 | ||
211 | void my_udelay (long us) | |
212 | { | |
213 | u_char x; | |
214 | volatile u_char *p = &x; | |
215 | int i; | |
216 | ||
217 | while (us--) | |
218 | for (i = 100; i; i--) | |
219 | x |= *p; | |
220 | } | |
221 | ||
222 | static inline int | |
223 | serial_paranoia_check(struct cyclades_port *info, char *name, | |
224 | const char *routine) | |
225 | { | |
226 | #ifdef SERIAL_PARANOIA_CHECK | |
227 | static const char *badmagic = | |
228 | "Warning: bad magic number for serial struct (%s) in %s\n"; | |
229 | static const char *badinfo = | |
230 | "Warning: null cyclades_port for (%s) in %s\n"; | |
231 | static const char *badrange = | |
232 | "Warning: cyclades_port out of range for (%s) in %s\n"; | |
233 | ||
234 | if (!info) { | |
235 | printk(badinfo, name, routine); | |
236 | return 1; | |
237 | } | |
238 | ||
239 | if( (long)info < (long)(&cy_port[0]) | |
240 | || (long)(&cy_port[NR_PORTS]) < (long)info ){ | |
241 | printk(badrange, name, routine); | |
242 | return 1; | |
243 | } | |
244 | ||
245 | if (info->magic != CYCLADES_MAGIC) { | |
246 | printk(badmagic, name, routine); | |
247 | return 1; | |
248 | } | |
249 | #endif | |
250 | return 0; | |
251 | } /* serial_paranoia_check */ | |
252 | ||
253 | #if 0 | |
254 | /* The following diagnostic routines allow the driver to spew | |
255 | information on the screen, even (especially!) during interrupts. | |
256 | */ | |
257 | void | |
258 | SP(char *data){ | |
259 | unsigned long flags; | |
260 | local_irq_save(flags); | |
261 | console_print(data); | |
262 | local_irq_restore(flags); | |
263 | } | |
264 | char scrn[2]; | |
265 | void | |
266 | CP(char data){ | |
267 | unsigned long flags; | |
268 | local_irq_save(flags); | |
269 | scrn[0] = data; | |
270 | console_print(scrn); | |
271 | local_irq_restore(flags); | |
272 | }/* CP */ | |
273 | ||
274 | void CP1(int data) { (data<10)? CP(data+'0'): CP(data+'A'-10); }/* CP1 */ | |
275 | void CP2(int data) { CP1((data>>4) & 0x0f); CP1( data & 0x0f); }/* CP2 */ | |
276 | void CP4(int data) { CP2((data>>8) & 0xff); CP2(data & 0xff); }/* CP4 */ | |
277 | void CP8(long data) { CP4((data>>16) & 0xffff); CP4(data & 0xffff); }/* CP8 */ | |
278 | #endif | |
279 | ||
280 | /* This routine waits up to 1000 micro-seconds for the previous | |
281 | command to the Cirrus chip to complete and then issues the | |
282 | new command. An error is returned if the previous command | |
283 | didn't finish within the time limit. | |
284 | */ | |
285 | u_short | |
286 | write_cy_cmd(volatile u_char *base_addr, u_char cmd) | |
287 | { | |
288 | unsigned long flags; | |
289 | volatile int i; | |
290 | ||
291 | local_irq_save(flags); | |
292 | /* Check to see that the previous command has completed */ | |
293 | for(i = 0 ; i < 100 ; i++){ | |
294 | if (base_addr[CyCCR] == 0){ | |
295 | break; | |
296 | } | |
297 | my_udelay(10L); | |
298 | } | |
299 | /* if the CCR never cleared, the previous command | |
300 | didn't finish within the "reasonable time" */ | |
301 | if ( i == 10 ) { | |
302 | local_irq_restore(flags); | |
303 | return (-1); | |
304 | } | |
305 | ||
306 | /* Issue the new command */ | |
307 | base_addr[CyCCR] = cmd; | |
308 | local_irq_restore(flags); | |
309 | return(0); | |
310 | } /* write_cy_cmd */ | |
311 | ||
312 | ||
313 | /* cy_start and cy_stop provide software output flow control as a | |
314 | function of XON/XOFF, software CTS, and other such stuff. */ | |
315 | ||
316 | static void | |
317 | cy_stop(struct tty_struct *tty) | |
318 | { | |
319 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
320 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
321 | int channel; | |
322 | unsigned long flags; | |
323 | ||
324 | #ifdef SERIAL_DEBUG_OTHER | |
325 | printk("cy_stop %s\n", tty->name); /* */ | |
326 | #endif | |
327 | ||
328 | if (serial_paranoia_check(info, tty->name, "cy_stop")) | |
329 | return; | |
330 | ||
331 | channel = info->line; | |
332 | ||
333 | local_irq_save(flags); | |
334 | base_addr[CyCAR] = (u_char)(channel); /* index channel */ | |
335 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
336 | local_irq_restore(flags); | |
337 | ||
338 | return; | |
339 | } /* cy_stop */ | |
340 | ||
341 | static void | |
342 | cy_start(struct tty_struct *tty) | |
343 | { | |
344 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
345 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
346 | int channel; | |
347 | unsigned long flags; | |
348 | ||
349 | #ifdef SERIAL_DEBUG_OTHER | |
350 | printk("cy_start %s\n", tty->name); /* */ | |
351 | #endif | |
352 | ||
353 | if (serial_paranoia_check(info, tty->name, "cy_start")) | |
354 | return; | |
355 | ||
356 | channel = info->line; | |
357 | ||
358 | local_irq_save(flags); | |
359 | base_addr[CyCAR] = (u_char)(channel); | |
360 | base_addr[CyIER] |= CyTxMpty; | |
361 | local_irq_restore(flags); | |
362 | ||
363 | return; | |
364 | } /* cy_start */ | |
365 | ||
366 | ||
367 | /* | |
368 | * This routine is used by the interrupt handler to schedule | |
369 | * processing in the software interrupt portion of the driver | |
370 | * (also known as the "bottom half"). This can be called any | |
371 | * number of times for any channel without harm. | |
372 | */ | |
373 | static inline void | |
374 | cy_sched_event(struct cyclades_port *info, int event) | |
375 | { | |
376 | info->event |= 1 << event; /* remember what kind of event and who */ | |
377 | schedule_work(&info->tqueue); | |
378 | } /* cy_sched_event */ | |
379 | ||
380 | ||
381 | /* The real interrupt service routines are called | |
382 | whenever the card wants its hand held--chars | |
383 | received, out buffer empty, modem change, etc. | |
384 | */ | |
385 | static irqreturn_t | |
386 | cd2401_rxerr_interrupt(int irq, void *dev_id, struct pt_regs *fp) | |
387 | { | |
388 | struct tty_struct *tty; | |
389 | struct cyclades_port *info; | |
390 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
391 | unsigned char err, rfoc; | |
392 | int channel; | |
393 | char data; | |
394 | ||
395 | /* determine the channel and change to that context */ | |
396 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
397 | info = &cy_port[channel]; | |
398 | info->last_active = jiffies; | |
399 | ||
400 | if ((err = base_addr[CyRISR]) & CyTIMEOUT) { | |
401 | /* This is a receive timeout interrupt, ignore it */ | |
402 | base_addr[CyREOIR] = CyNOTRANS; | |
403 | return IRQ_HANDLED; | |
404 | } | |
405 | ||
406 | /* Read a byte of data if there is any - assume the error | |
407 | * is associated with this character */ | |
408 | ||
409 | if ((rfoc = base_addr[CyRFOC]) != 0) | |
410 | data = base_addr[CyRDR]; | |
411 | else | |
412 | data = 0; | |
413 | ||
414 | /* if there is nowhere to put the data, discard it */ | |
415 | if(info->tty == 0) { | |
416 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
417 | return IRQ_HANDLED; | |
418 | } | |
419 | else { /* there is an open port for this data */ | |
420 | tty = info->tty; | |
421 | if(err & info->ignore_status_mask){ | |
422 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
423 | return IRQ_HANDLED; | |
424 | } | |
425 | if (tty->flip.count < TTY_FLIPBUF_SIZE){ | |
426 | tty->flip.count++; | |
427 | if (err & info->read_status_mask){ | |
428 | if(err & CyBREAK){ | |
429 | *tty->flip.flag_buf_ptr++ = TTY_BREAK; | |
430 | *tty->flip.char_buf_ptr++ = data; | |
431 | if (info->flags & ASYNC_SAK){ | |
432 | do_SAK(tty); | |
433 | } | |
434 | }else if(err & CyFRAME){ | |
435 | *tty->flip.flag_buf_ptr++ = TTY_FRAME; | |
436 | *tty->flip.char_buf_ptr++ = data; | |
437 | }else if(err & CyPARITY){ | |
438 | *tty->flip.flag_buf_ptr++ = TTY_PARITY; | |
439 | *tty->flip.char_buf_ptr++ = data; | |
440 | }else if(err & CyOVERRUN){ | |
441 | *tty->flip.flag_buf_ptr++ = TTY_OVERRUN; | |
442 | *tty->flip.char_buf_ptr++ = 0; | |
443 | /* | |
444 | If the flip buffer itself is | |
445 | overflowing, we still loose | |
446 | the next incoming character. | |
447 | */ | |
448 | if(tty->flip.count < TTY_FLIPBUF_SIZE){ | |
449 | tty->flip.count++; | |
450 | *tty->flip.flag_buf_ptr++ = TTY_NORMAL; | |
451 | *tty->flip.char_buf_ptr++ = data; | |
452 | } | |
453 | /* These two conditions may imply */ | |
454 | /* a normal read should be done. */ | |
455 | /* else if(data & CyTIMEOUT) */ | |
456 | /* else if(data & CySPECHAR) */ | |
457 | }else{ | |
458 | *tty->flip.flag_buf_ptr++ = 0; | |
459 | *tty->flip.char_buf_ptr++ = 0; | |
460 | } | |
461 | }else{ | |
462 | *tty->flip.flag_buf_ptr++ = 0; | |
463 | *tty->flip.char_buf_ptr++ = 0; | |
464 | } | |
465 | }else{ | |
466 | /* there was a software buffer overrun | |
467 | and nothing could be done about it!!! */ | |
468 | } | |
469 | } | |
470 | schedule_delayed_work(&tty->flip.work, 1); | |
471 | /* end of service */ | |
472 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
473 | return IRQ_HANDLED; | |
474 | } /* cy_rxerr_interrupt */ | |
475 | ||
476 | static irqreturn_t | |
477 | cd2401_modem_interrupt(int irq, void *dev_id, struct pt_regs *fp) | |
478 | { | |
479 | struct cyclades_port *info; | |
480 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
481 | int channel; | |
482 | int mdm_change; | |
483 | int mdm_status; | |
484 | ||
485 | ||
486 | /* determine the channel and change to that context */ | |
487 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
488 | info = &cy_port[channel]; | |
489 | info->last_active = jiffies; | |
490 | ||
491 | mdm_change = base_addr[CyMISR]; | |
492 | mdm_status = base_addr[CyMSVR1]; | |
493 | ||
494 | if(info->tty == 0){ /* nowhere to put the data, ignore it */ | |
495 | ; | |
496 | }else{ | |
497 | if((mdm_change & CyDCD) | |
498 | && (info->flags & ASYNC_CHECK_CD)){ | |
499 | if(mdm_status & CyDCD){ | |
500 | /* CP('!'); */ | |
501 | cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP); | |
502 | } else { | |
503 | /* CP('@'); */ | |
504 | cy_sched_event(info, Cy_EVENT_HANGUP); | |
505 | } | |
506 | } | |
507 | if((mdm_change & CyCTS) | |
508 | && (info->flags & ASYNC_CTS_FLOW)){ | |
509 | if(info->tty->stopped){ | |
510 | if(mdm_status & CyCTS){ | |
511 | /* !!! cy_start isn't used because... */ | |
512 | info->tty->stopped = 0; | |
513 | base_addr[CyIER] |= CyTxMpty; | |
514 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
515 | } | |
516 | }else{ | |
517 | if(!(mdm_status & CyCTS)){ | |
518 | /* !!! cy_stop isn't used because... */ | |
519 | info->tty->stopped = 1; | |
520 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
521 | } | |
522 | } | |
523 | } | |
524 | if(mdm_status & CyDSR){ | |
525 | } | |
526 | } | |
527 | base_addr[CyMEOIR] = 0; | |
528 | return IRQ_HANDLED; | |
529 | } /* cy_modem_interrupt */ | |
530 | ||
531 | static irqreturn_t | |
532 | cd2401_tx_interrupt(int irq, void *dev_id, struct pt_regs *fp) | |
533 | { | |
534 | struct cyclades_port *info; | |
535 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
536 | int channel; | |
537 | int char_count, saved_cnt; | |
538 | int outch; | |
539 | ||
540 | /* determine the channel and change to that context */ | |
541 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
542 | ||
543 | #ifdef CONFIG_REMOTE_DEBUG | |
544 | if (channel == DEBUG_PORT) { | |
545 | panic ("TxInt on debug port!!!"); | |
546 | } | |
547 | #endif | |
548 | ||
549 | info = &cy_port[channel]; | |
550 | ||
551 | /* validate the port number (as configured and open) */ | |
552 | if( (channel < 0) || (NR_PORTS <= channel) ){ | |
553 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
554 | base_addr[CyTEOIR] = CyNOTRANS; | |
555 | return IRQ_HANDLED; | |
556 | } | |
557 | info->last_active = jiffies; | |
558 | if(info->tty == 0){ | |
559 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
560 | if (info->xmit_cnt < WAKEUP_CHARS) { | |
561 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
562 | } | |
563 | base_addr[CyTEOIR] = CyNOTRANS; | |
564 | return IRQ_HANDLED; | |
565 | } | |
566 | ||
567 | /* load the on-chip space available for outbound data */ | |
568 | saved_cnt = char_count = base_addr[CyTFTC]; | |
569 | ||
570 | if(info->x_char) { /* send special char */ | |
571 | outch = info->x_char; | |
572 | base_addr[CyTDR] = outch; | |
573 | char_count--; | |
574 | info->x_char = 0; | |
575 | } | |
576 | ||
577 | if (info->x_break){ | |
578 | /* The Cirrus chip requires the "Embedded Transmit | |
579 | Commands" of start break, delay, and end break | |
580 | sequences to be sent. The duration of the | |
581 | break is given in TICs, which runs at HZ | |
582 | (typically 100) and the PPR runs at 200 Hz, | |
583 | so the delay is duration * 200/HZ, and thus a | |
584 | break can run from 1/100 sec to about 5/4 sec. | |
585 | Need to check these values - RGH 141095. | |
586 | */ | |
587 | base_addr[CyTDR] = 0; /* start break */ | |
588 | base_addr[CyTDR] = 0x81; | |
589 | base_addr[CyTDR] = 0; /* delay a bit */ | |
590 | base_addr[CyTDR] = 0x82; | |
591 | base_addr[CyTDR] = info->x_break*200/HZ; | |
592 | base_addr[CyTDR] = 0; /* terminate break */ | |
593 | base_addr[CyTDR] = 0x83; | |
594 | char_count -= 7; | |
595 | info->x_break = 0; | |
596 | } | |
597 | ||
598 | while (char_count > 0){ | |
599 | if (!info->xmit_cnt){ | |
600 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
601 | break; | |
602 | } | |
603 | if (info->xmit_buf == 0){ | |
604 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
605 | break; | |
606 | } | |
607 | if (info->tty->stopped || info->tty->hw_stopped){ | |
608 | base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy); | |
609 | break; | |
610 | } | |
611 | /* Because the Embedded Transmit Commands have been | |
612 | enabled, we must check to see if the escape | |
613 | character, NULL, is being sent. If it is, we | |
614 | must ensure that there is room for it to be | |
615 | doubled in the output stream. Therefore we | |
616 | no longer advance the pointer when the character | |
617 | is fetched, but rather wait until after the check | |
618 | for a NULL output character. (This is necessary | |
619 | because there may not be room for the two chars | |
620 | needed to send a NULL. | |
621 | */ | |
622 | outch = info->xmit_buf[info->xmit_tail]; | |
623 | if( outch ){ | |
624 | info->xmit_cnt--; | |
625 | info->xmit_tail = (info->xmit_tail + 1) | |
626 | & (PAGE_SIZE - 1); | |
627 | base_addr[CyTDR] = outch; | |
628 | char_count--; | |
629 | }else{ | |
630 | if(char_count > 1){ | |
631 | info->xmit_cnt--; | |
632 | info->xmit_tail = (info->xmit_tail + 1) | |
633 | & (PAGE_SIZE - 1); | |
634 | base_addr[CyTDR] = outch; | |
635 | base_addr[CyTDR] = 0; | |
636 | char_count--; | |
637 | char_count--; | |
638 | }else{ | |
639 | break; | |
640 | } | |
641 | } | |
642 | } | |
643 | ||
644 | if (info->xmit_cnt < WAKEUP_CHARS) { | |
645 | cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); | |
646 | } | |
647 | base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS; | |
648 | return IRQ_HANDLED; | |
649 | } /* cy_tx_interrupt */ | |
650 | ||
651 | static irqreturn_t | |
652 | cd2401_rx_interrupt(int irq, void *dev_id, struct pt_regs *fp) | |
653 | { | |
654 | struct tty_struct *tty; | |
655 | struct cyclades_port *info; | |
656 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
657 | int channel; | |
658 | char data; | |
659 | int char_count; | |
660 | int save_cnt; | |
661 | ||
662 | /* determine the channel and change to that context */ | |
663 | channel = (u_short ) (base_addr[CyLICR] >> 2); | |
664 | info = &cy_port[channel]; | |
665 | info->last_active = jiffies; | |
666 | save_cnt = char_count = base_addr[CyRFOC]; | |
667 | ||
668 | #ifdef CONFIG_REMOTE_DEBUG | |
669 | if (channel == DEBUG_PORT) { | |
670 | while (char_count--) { | |
671 | data = base_addr[CyRDR]; | |
672 | queueDebugChar(data); | |
673 | } | |
674 | } | |
675 | else | |
676 | #endif | |
677 | /* if there is nowhere to put the data, discard it */ | |
678 | if(info->tty == 0){ | |
679 | while(char_count--){ | |
680 | data = base_addr[CyRDR]; | |
681 | } | |
682 | }else{ /* there is an open port for this data */ | |
683 | tty = info->tty; | |
684 | /* load # characters available from the chip */ | |
685 | ||
686 | #ifdef CYCLOM_ENABLE_MONITORING | |
687 | ++info->mon.int_count; | |
688 | info->mon.char_count += char_count; | |
689 | if (char_count > info->mon.char_max) | |
690 | info->mon.char_max = char_count; | |
691 | info->mon.char_last = char_count; | |
692 | #endif | |
693 | while(char_count--){ | |
694 | data = base_addr[CyRDR]; | |
695 | if (tty->flip.count >= TTY_FLIPBUF_SIZE){ | |
696 | continue; | |
697 | } | |
698 | tty->flip.count++; | |
699 | *tty->flip.flag_buf_ptr++ = TTY_NORMAL; | |
700 | *tty->flip.char_buf_ptr++ = data; | |
701 | #ifdef CYCLOM_16Y_HACK | |
702 | udelay(10L); | |
703 | #endif | |
704 | } | |
705 | schedule_delayed_work(&tty->flip.work, 1); | |
706 | } | |
707 | /* end of service */ | |
708 | base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS; | |
709 | return IRQ_HANDLED; | |
710 | } /* cy_rx_interrupt */ | |
711 | ||
712 | /* | |
713 | * This routine is used to handle the "bottom half" processing for the | |
714 | * serial driver, known also the "software interrupt" processing. | |
715 | * This processing is done at the kernel interrupt level, after the | |
716 | * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This | |
717 | * is where time-consuming activities which can not be done in the | |
718 | * interrupt driver proper are done; the interrupt driver schedules | |
719 | * them using cy_sched_event(), and they get done here. | |
720 | * | |
721 | * This is done through one level of indirection--the task queue. | |
722 | * When a hardware interrupt service routine wants service by the | |
723 | * driver's bottom half, it enqueues the appropriate tq_struct (one | |
724 | * per port) to the keventd work queue and sets a request flag | |
725 | * that the work queue be processed. | |
726 | * | |
727 | * Although this may seem unwieldy, it gives the system a way to | |
728 | * pass an argument (in this case the pointer to the cyclades_port | |
729 | * structure) to the bottom half of the driver. Previous kernels | |
730 | * had to poll every port to see if that port needed servicing. | |
731 | */ | |
732 | static void | |
733 | do_softint(void *private_) | |
734 | { | |
735 | struct cyclades_port *info = (struct cyclades_port *) private_; | |
736 | struct tty_struct *tty; | |
737 | ||
738 | tty = info->tty; | |
739 | if (!tty) | |
740 | return; | |
741 | ||
742 | if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) { | |
743 | tty_hangup(info->tty); | |
744 | wake_up_interruptible(&info->open_wait); | |
745 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
746 | } | |
747 | if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) { | |
748 | wake_up_interruptible(&info->open_wait); | |
749 | } | |
750 | if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) { | |
751 | tty_wakeup(tty); | |
752 | } | |
753 | } /* do_softint */ | |
754 | ||
755 | ||
756 | /* This is called whenever a port becomes active; | |
757 | interrupts are enabled and DTR & RTS are turned on. | |
758 | */ | |
759 | static int | |
760 | startup(struct cyclades_port * info) | |
761 | { | |
762 | unsigned long flags; | |
763 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
764 | int channel; | |
765 | ||
766 | if (info->flags & ASYNC_INITIALIZED){ | |
767 | return 0; | |
768 | } | |
769 | ||
770 | if (!info->type){ | |
771 | if (info->tty){ | |
772 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
773 | } | |
774 | return 0; | |
775 | } | |
776 | if (!info->xmit_buf){ | |
777 | info->xmit_buf = (unsigned char *) get_zeroed_page (GFP_KERNEL); | |
778 | if (!info->xmit_buf){ | |
779 | return -ENOMEM; | |
780 | } | |
781 | } | |
782 | ||
783 | config_setup(info); | |
784 | ||
785 | channel = info->line; | |
786 | ||
787 | #ifdef SERIAL_DEBUG_OPEN | |
788 | printk("startup channel %d\n", channel); | |
789 | #endif | |
790 | ||
791 | local_irq_save(flags); | |
792 | base_addr[CyCAR] = (u_char)channel; | |
793 | write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR); | |
794 | ||
795 | base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ | |
796 | base_addr[CyMSVR1] = CyRTS; | |
797 | /* CP('S');CP('1'); */ | |
798 | base_addr[CyMSVR2] = CyDTR; | |
799 | ||
800 | #ifdef SERIAL_DEBUG_DTR | |
801 | printk("cyc: %d: raising DTR\n", __LINE__); | |
802 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
803 | #endif | |
804 | ||
805 | base_addr[CyIER] |= CyRxData; | |
806 | info->flags |= ASYNC_INITIALIZED; | |
807 | ||
808 | if (info->tty){ | |
809 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
810 | } | |
811 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
812 | ||
813 | local_irq_restore(flags); | |
814 | ||
815 | #ifdef SERIAL_DEBUG_OPEN | |
816 | printk(" done\n"); | |
817 | #endif | |
818 | return 0; | |
819 | } /* startup */ | |
820 | ||
821 | void | |
822 | start_xmit( struct cyclades_port *info ) | |
823 | { | |
824 | unsigned long flags; | |
825 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
826 | int channel; | |
827 | ||
828 | channel = info->line; | |
829 | local_irq_save(flags); | |
830 | base_addr[CyCAR] = channel; | |
831 | base_addr[CyIER] |= CyTxMpty; | |
832 | local_irq_restore(flags); | |
833 | } /* start_xmit */ | |
834 | ||
835 | /* | |
836 | * This routine shuts down a serial port; interrupts are disabled, | |
837 | * and DTR is dropped if the hangup on close termio flag is on. | |
838 | */ | |
839 | static void | |
840 | shutdown(struct cyclades_port * info) | |
841 | { | |
842 | unsigned long flags; | |
843 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
844 | int channel; | |
845 | ||
846 | if (!(info->flags & ASYNC_INITIALIZED)){ | |
847 | /* CP('$'); */ | |
848 | return; | |
849 | } | |
850 | ||
851 | channel = info->line; | |
852 | ||
853 | #ifdef SERIAL_DEBUG_OPEN | |
854 | printk("shutdown channel %d\n", channel); | |
855 | #endif | |
856 | ||
857 | /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE | |
858 | SENT BEFORE DROPPING THE LINE !!! (Perhaps | |
859 | set some flag that is read when XMTY happens.) | |
860 | Other choices are to delay some fixed interval | |
861 | or schedule some later processing. | |
862 | */ | |
863 | local_irq_save(flags); | |
864 | if (info->xmit_buf){ | |
865 | free_page((unsigned long) info->xmit_buf); | |
866 | info->xmit_buf = 0; | |
867 | } | |
868 | ||
869 | base_addr[CyCAR] = (u_char)channel; | |
870 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { | |
871 | base_addr[CyMSVR1] = 0; | |
872 | /* CP('C');CP('1'); */ | |
873 | base_addr[CyMSVR2] = 0; | |
874 | #ifdef SERIAL_DEBUG_DTR | |
875 | printk("cyc: %d: dropping DTR\n", __LINE__); | |
876 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
877 | #endif | |
878 | } | |
879 | write_cy_cmd(base_addr,CyDIS_RCVR); | |
880 | /* it may be appropriate to clear _XMIT at | |
881 | some later date (after testing)!!! */ | |
882 | ||
883 | if (info->tty){ | |
884 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
885 | } | |
886 | info->flags &= ~ASYNC_INITIALIZED; | |
887 | local_irq_restore(flags); | |
888 | ||
889 | #ifdef SERIAL_DEBUG_OPEN | |
890 | printk(" done\n"); | |
891 | #endif | |
892 | return; | |
893 | } /* shutdown */ | |
894 | ||
895 | /* | |
896 | * This routine finds or computes the various line characteristics. | |
897 | */ | |
898 | static void | |
899 | config_setup(struct cyclades_port * info) | |
900 | { | |
901 | unsigned long flags; | |
902 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
903 | int channel; | |
904 | unsigned cflag; | |
905 | int i; | |
906 | unsigned char ti, need_init_chan = 0; | |
907 | ||
908 | if (!info->tty || !info->tty->termios){ | |
909 | return; | |
910 | } | |
911 | if (info->line == -1){ | |
912 | return; | |
913 | } | |
914 | cflag = info->tty->termios->c_cflag; | |
915 | ||
916 | /* baud rate */ | |
917 | i = cflag & CBAUD; | |
918 | #ifdef CBAUDEX | |
919 | /* Starting with kernel 1.1.65, there is direct support for | |
920 | higher baud rates. The following code supports those | |
921 | changes. The conditional aspect allows this driver to be | |
922 | used for earlier as well as later kernel versions. (The | |
923 | mapping is slightly different from serial.c because there | |
924 | is still the possibility of supporting 75 kbit/sec with | |
925 | the Cyclades board.) | |
926 | */ | |
927 | if (i & CBAUDEX) { | |
928 | if (i == B57600) | |
929 | i = 16; | |
930 | else if(i == B115200) | |
931 | i = 18; | |
932 | #ifdef B78600 | |
933 | else if(i == B78600) | |
934 | i = 17; | |
935 | #endif | |
936 | else | |
937 | info->tty->termios->c_cflag &= ~CBAUDEX; | |
938 | } | |
939 | #endif | |
940 | if (i == 15) { | |
941 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
942 | i += 1; | |
943 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
944 | i += 3; | |
945 | } | |
946 | /* Don't ever change the speed of the console port. It will | |
947 | * run at the speed specified in bootinfo, or at 19.2K */ | |
948 | /* Actually, it should run at whatever speed 166Bug was using */ | |
949 | /* Note info->timeout isn't used at present */ | |
950 | if (info != serial_console_info) { | |
951 | info->tbpr = baud_bpr[i]; /* Tx BPR */ | |
952 | info->tco = baud_co[i]; /* Tx CO */ | |
953 | info->rbpr = baud_bpr[i]; /* Rx BPR */ | |
954 | info->rco = baud_co[i] >> 5; /* Rx CO */ | |
955 | if (baud_table[i] == 134) { | |
956 | info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2; | |
957 | /* get it right for 134.5 baud */ | |
958 | } else if (baud_table[i]) { | |
959 | info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2; | |
960 | /* this needs to be propagated into the card info */ | |
961 | } else { | |
962 | info->timeout = 0; | |
963 | } | |
964 | } | |
965 | /* By tradition (is it a standard?) a baud rate of zero | |
966 | implies the line should be/has been closed. A bit | |
967 | later in this routine such a test is performed. */ | |
968 | ||
969 | /* byte size and parity */ | |
970 | info->cor7 = 0; | |
971 | info->cor6 = 0; | |
972 | info->cor5 = 0; | |
973 | info->cor4 = (info->default_threshold | |
974 | ? info->default_threshold | |
975 | : baud_cor4[i]); /* receive threshold */ | |
976 | /* Following two lines added 101295, RGH. */ | |
977 | /* It is obviously wrong to access CyCORx, and not info->corx here, | |
978 | * try and remember to fix it later! */ | |
979 | channel = info->line; | |
980 | base_addr[CyCAR] = (u_char)channel; | |
981 | if (C_CLOCAL(info->tty)) { | |
982 | if (base_addr[CyIER] & CyMdmCh) | |
983 | base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */ | |
984 | /* ignore 1->0 modem transitions */ | |
985 | if (base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) | |
986 | base_addr[CyCOR4] &= ~(CyDSR|CyCTS|CyDCD); | |
987 | /* ignore 0->1 modem transitions */ | |
988 | if (base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) | |
989 | base_addr[CyCOR5] &= ~(CyDSR|CyCTS|CyDCD); | |
990 | } else { | |
991 | if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh) | |
992 | base_addr[CyIER] |= CyMdmCh; /* with modem intr */ | |
993 | /* act on 1->0 modem transitions */ | |
994 | if ((base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD)) | |
995 | base_addr[CyCOR4] |= CyDSR|CyCTS|CyDCD; | |
996 | /* act on 0->1 modem transitions */ | |
997 | if ((base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD)) | |
998 | base_addr[CyCOR5] |= CyDSR|CyCTS|CyDCD; | |
999 | } | |
1000 | info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP; | |
1001 | info->cor2 = CyETC; | |
1002 | switch(cflag & CSIZE){ | |
1003 | case CS5: | |
1004 | info->cor1 = Cy_5_BITS; | |
1005 | break; | |
1006 | case CS6: | |
1007 | info->cor1 = Cy_6_BITS; | |
1008 | break; | |
1009 | case CS7: | |
1010 | info->cor1 = Cy_7_BITS; | |
1011 | break; | |
1012 | case CS8: | |
1013 | info->cor1 = Cy_8_BITS; | |
1014 | break; | |
1015 | } | |
1016 | if (cflag & PARENB){ | |
1017 | if (cflag & PARODD){ | |
1018 | info->cor1 |= CyPARITY_O; | |
1019 | }else{ | |
1020 | info->cor1 |= CyPARITY_E; | |
1021 | } | |
1022 | }else{ | |
1023 | info->cor1 |= CyPARITY_NONE; | |
1024 | } | |
1025 | ||
1026 | /* CTS flow control flag */ | |
1027 | #if 0 | |
1028 | /* Don't complcate matters for now! RGH 141095 */ | |
1029 | if (cflag & CRTSCTS){ | |
1030 | info->flags |= ASYNC_CTS_FLOW; | |
1031 | info->cor2 |= CyCtsAE; | |
1032 | }else{ | |
1033 | info->flags &= ~ASYNC_CTS_FLOW; | |
1034 | info->cor2 &= ~CyCtsAE; | |
1035 | } | |
1036 | #endif | |
1037 | if (cflag & CLOCAL) | |
1038 | info->flags &= ~ASYNC_CHECK_CD; | |
1039 | else | |
1040 | info->flags |= ASYNC_CHECK_CD; | |
1041 | ||
1042 | /*********************************************** | |
1043 | The hardware option, CyRtsAO, presents RTS when | |
1044 | the chip has characters to send. Since most modems | |
1045 | use RTS as reverse (inbound) flow control, this | |
1046 | option is not used. If inbound flow control is | |
1047 | necessary, DTR can be programmed to provide the | |
1048 | appropriate signals for use with a non-standard | |
1049 | cable. Contact Marcio Saito for details. | |
1050 | ***********************************************/ | |
1051 | ||
1052 | channel = info->line; | |
1053 | ||
1054 | local_irq_save(flags); | |
1055 | base_addr[CyCAR] = (u_char)channel; | |
1056 | ||
1057 | /* CyCMR set once only in mvme167_init_serial() */ | |
1058 | if (base_addr[CyLICR] != channel << 2) | |
1059 | base_addr[CyLICR] = channel << 2; | |
1060 | if (base_addr[CyLIVR] != 0x5c) | |
1061 | base_addr[CyLIVR] = 0x5c; | |
1062 | ||
1063 | /* tx and rx baud rate */ | |
1064 | ||
1065 | if (base_addr[CyCOR1] != info->cor1) | |
1066 | need_init_chan = 1; | |
1067 | if (base_addr[CyTCOR] != info->tco) | |
1068 | base_addr[CyTCOR] = info->tco; | |
1069 | if (base_addr[CyTBPR] != info->tbpr) | |
1070 | base_addr[CyTBPR] = info->tbpr; | |
1071 | if (base_addr[CyRCOR] != info->rco) | |
1072 | base_addr[CyRCOR] = info->rco; | |
1073 | if (base_addr[CyRBPR] != info->rbpr) | |
1074 | base_addr[CyRBPR] = info->rbpr; | |
1075 | ||
1076 | /* set line characteristics according configuration */ | |
1077 | ||
1078 | if (base_addr[CySCHR1] != START_CHAR(info->tty)) | |
1079 | base_addr[CySCHR1] = START_CHAR(info->tty); | |
1080 | if (base_addr[CySCHR2] != STOP_CHAR(info->tty)) | |
1081 | base_addr[CySCHR2] = STOP_CHAR(info->tty); | |
1082 | if (base_addr[CySCRL] != START_CHAR(info->tty)) | |
1083 | base_addr[CySCRL] = START_CHAR(info->tty); | |
1084 | if (base_addr[CySCRH] != START_CHAR(info->tty)) | |
1085 | base_addr[CySCRH] = START_CHAR(info->tty); | |
1086 | if (base_addr[CyCOR1] != info->cor1) | |
1087 | base_addr[CyCOR1] = info->cor1; | |
1088 | if (base_addr[CyCOR2] != info->cor2) | |
1089 | base_addr[CyCOR2] = info->cor2; | |
1090 | if (base_addr[CyCOR3] != info->cor3) | |
1091 | base_addr[CyCOR3] = info->cor3; | |
1092 | if (base_addr[CyCOR4] != info->cor4) | |
1093 | base_addr[CyCOR4] = info->cor4; | |
1094 | if (base_addr[CyCOR5] != info->cor5) | |
1095 | base_addr[CyCOR5] = info->cor5; | |
1096 | if (base_addr[CyCOR6] != info->cor6) | |
1097 | base_addr[CyCOR6] = info->cor6; | |
1098 | if (base_addr[CyCOR7] != info->cor7) | |
1099 | base_addr[CyCOR7] = info->cor7; | |
1100 | ||
1101 | if (need_init_chan) | |
1102 | write_cy_cmd(base_addr,CyINIT_CHAN); | |
1103 | ||
1104 | base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ | |
1105 | ||
1106 | /* 2ms default rx timeout */ | |
1107 | ti = info->default_timeout ? info->default_timeout : 0x02; | |
1108 | if (base_addr[CyRTPRL] != ti) | |
1109 | base_addr[CyRTPRL] = ti; | |
1110 | if (base_addr[CyRTPRH] != 0) | |
1111 | base_addr[CyRTPRH] = 0; | |
1112 | ||
1113 | /* Set up RTS here also ????? RGH 141095 */ | |
1114 | if(i == 0){ /* baud rate is zero, turn off line */ | |
1115 | if ((base_addr[CyMSVR2] & CyDTR) == CyDTR) | |
1116 | base_addr[CyMSVR2] = 0; | |
1117 | #ifdef SERIAL_DEBUG_DTR | |
1118 | printk("cyc: %d: dropping DTR\n", __LINE__); | |
1119 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1120 | #endif | |
1121 | }else{ | |
1122 | if ((base_addr[CyMSVR2] & CyDTR) != CyDTR) | |
1123 | base_addr[CyMSVR2] = CyDTR; | |
1124 | #ifdef SERIAL_DEBUG_DTR | |
1125 | printk("cyc: %d: raising DTR\n", __LINE__); | |
1126 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1127 | #endif | |
1128 | } | |
1129 | ||
1130 | if (info->tty){ | |
1131 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
1132 | } | |
1133 | ||
1134 | local_irq_restore(flags); | |
1135 | ||
1136 | } /* config_setup */ | |
1137 | ||
1138 | ||
1139 | static void | |
1140 | cy_put_char(struct tty_struct *tty, unsigned char ch) | |
1141 | { | |
1142 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1143 | unsigned long flags; | |
1144 | ||
1145 | #ifdef SERIAL_DEBUG_IO | |
1146 | printk("cy_put_char %s(0x%02x)\n", tty->name, ch); | |
1147 | #endif | |
1148 | ||
1149 | if (serial_paranoia_check(info, tty->name, "cy_put_char")) | |
1150 | return; | |
1151 | ||
1152 | if (!tty || !info->xmit_buf) | |
1153 | return; | |
1154 | ||
1155 | local_irq_save(flags); | |
1156 | if (info->xmit_cnt >= PAGE_SIZE - 1) { | |
1157 | local_irq_restore(flags); | |
1158 | return; | |
1159 | } | |
1160 | ||
1161 | info->xmit_buf[info->xmit_head++] = ch; | |
1162 | info->xmit_head &= PAGE_SIZE - 1; | |
1163 | info->xmit_cnt++; | |
1164 | local_irq_restore(flags); | |
1165 | } /* cy_put_char */ | |
1166 | ||
1167 | ||
1168 | static void | |
1169 | cy_flush_chars(struct tty_struct *tty) | |
1170 | { | |
1171 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1172 | unsigned long flags; | |
1173 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1174 | int channel; | |
1175 | ||
1176 | #ifdef SERIAL_DEBUG_IO | |
1177 | printk("cy_flush_chars %s\n", tty->name); /* */ | |
1178 | #endif | |
1179 | ||
1180 | if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) | |
1181 | return; | |
1182 | ||
1183 | if (info->xmit_cnt <= 0 || tty->stopped | |
1184 | || tty->hw_stopped || !info->xmit_buf) | |
1185 | return; | |
1186 | ||
1187 | channel = info->line; | |
1188 | ||
1189 | local_irq_save(flags); | |
1190 | base_addr[CyCAR] = channel; | |
1191 | base_addr[CyIER] |= CyTxMpty; | |
1192 | local_irq_restore(flags); | |
1193 | } /* cy_flush_chars */ | |
1194 | ||
1195 | ||
1196 | /* This routine gets called when tty_write has put something into | |
1197 | the write_queue. If the port is not already transmitting stuff, | |
1198 | start it off by enabling interrupts. The interrupt service | |
1199 | routine will then ensure that the characters are sent. If the | |
1200 | port is already active, there is no need to kick it. | |
1201 | */ | |
1202 | static int | |
1203 | cy_write(struct tty_struct * tty, | |
1204 | const unsigned char *buf, int count) | |
1205 | { | |
1206 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1207 | unsigned long flags; | |
1208 | int c, total = 0; | |
1209 | ||
1210 | #ifdef SERIAL_DEBUG_IO | |
1211 | printk("cy_write %s\n", tty->name); /* */ | |
1212 | #endif | |
1213 | ||
1214 | if (serial_paranoia_check(info, tty->name, "cy_write")){ | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1218 | if (!tty || !info->xmit_buf || !tmp_buf){ | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | while (1) { | |
1223 | local_irq_save(flags); | |
1224 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, | |
1225 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
1226 | if (c <= 0) { | |
1227 | local_irq_restore(flags); | |
1228 | break; | |
1229 | } | |
1230 | ||
1231 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
1232 | info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1233 | info->xmit_cnt += c; | |
1234 | local_irq_restore(flags); | |
1235 | ||
1236 | buf += c; | |
1237 | count -= c; | |
1238 | total += c; | |
1239 | } | |
1240 | ||
1241 | if (info->xmit_cnt | |
1242 | && !tty->stopped | |
1243 | && !tty->hw_stopped ) { | |
1244 | start_xmit(info); | |
1245 | } | |
1246 | return total; | |
1247 | } /* cy_write */ | |
1248 | ||
1249 | ||
1250 | static int | |
1251 | cy_write_room(struct tty_struct *tty) | |
1252 | { | |
1253 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1254 | int ret; | |
1255 | ||
1256 | #ifdef SERIAL_DEBUG_IO | |
1257 | printk("cy_write_room %s\n", tty->name); /* */ | |
1258 | #endif | |
1259 | ||
1260 | if (serial_paranoia_check(info, tty->name, "cy_write_room")) | |
1261 | return 0; | |
1262 | ret = PAGE_SIZE - info->xmit_cnt - 1; | |
1263 | if (ret < 0) | |
1264 | ret = 0; | |
1265 | return ret; | |
1266 | } /* cy_write_room */ | |
1267 | ||
1268 | ||
1269 | static int | |
1270 | cy_chars_in_buffer(struct tty_struct *tty) | |
1271 | { | |
1272 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1273 | ||
1274 | #ifdef SERIAL_DEBUG_IO | |
1275 | printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */ | |
1276 | #endif | |
1277 | ||
1278 | if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) | |
1279 | return 0; | |
1280 | ||
1281 | return info->xmit_cnt; | |
1282 | } /* cy_chars_in_buffer */ | |
1283 | ||
1284 | ||
1285 | static void | |
1286 | cy_flush_buffer(struct tty_struct *tty) | |
1287 | { | |
1288 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1289 | unsigned long flags; | |
1290 | ||
1291 | #ifdef SERIAL_DEBUG_IO | |
1292 | printk("cy_flush_buffer %s\n", tty->name); /* */ | |
1293 | #endif | |
1294 | ||
1295 | if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) | |
1296 | return; | |
1297 | local_irq_save(flags); | |
1298 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1299 | local_irq_restore(flags); | |
1300 | tty_wakeup(tty); | |
1301 | } /* cy_flush_buffer */ | |
1302 | ||
1303 | ||
1304 | /* This routine is called by the upper-layer tty layer to signal | |
1305 | that incoming characters should be throttled or that the | |
1306 | throttle should be released. | |
1307 | */ | |
1308 | static void | |
1309 | cy_throttle(struct tty_struct * tty) | |
1310 | { | |
1311 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1312 | unsigned long flags; | |
1313 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1314 | int channel; | |
1315 | ||
1316 | #ifdef SERIAL_DEBUG_THROTTLE | |
1317 | char buf[64]; | |
1318 | ||
1319 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
1320 | tty->ldisc.chars_in_buffer(tty)); | |
1321 | printk("cy_throttle %s\n", tty->name); | |
1322 | #endif | |
1323 | ||
1324 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){ | |
1325 | return; | |
1326 | } | |
1327 | ||
1328 | if (I_IXOFF(tty)) { | |
1329 | info->x_char = STOP_CHAR(tty); | |
1330 | /* Should use the "Send Special Character" feature!!! */ | |
1331 | } | |
1332 | ||
1333 | channel = info->line; | |
1334 | ||
1335 | local_irq_save(flags); | |
1336 | base_addr[CyCAR] = (u_char)channel; | |
1337 | base_addr[CyMSVR1] = 0; | |
1338 | local_irq_restore(flags); | |
1339 | ||
1340 | return; | |
1341 | } /* cy_throttle */ | |
1342 | ||
1343 | ||
1344 | static void | |
1345 | cy_unthrottle(struct tty_struct * tty) | |
1346 | { | |
1347 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1348 | unsigned long flags; | |
1349 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1350 | int channel; | |
1351 | ||
1352 | #ifdef SERIAL_DEBUG_THROTTLE | |
1353 | char buf[64]; | |
1354 | ||
1355 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
1356 | tty->ldisc.chars_in_buffer(tty)); | |
1357 | printk("cy_unthrottle %s\n", tty->name); | |
1358 | #endif | |
1359 | ||
1360 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")){ | |
1361 | return; | |
1362 | } | |
1363 | ||
1364 | if (I_IXOFF(tty)) { | |
1365 | info->x_char = START_CHAR(tty); | |
1366 | /* Should use the "Send Special Character" feature!!! */ | |
1367 | } | |
1368 | ||
1369 | channel = info->line; | |
1370 | ||
1371 | local_irq_save(flags); | |
1372 | base_addr[CyCAR] = (u_char)channel; | |
1373 | base_addr[CyMSVR1] = CyRTS; | |
1374 | local_irq_restore(flags); | |
1375 | ||
1376 | return; | |
1377 | } /* cy_unthrottle */ | |
1378 | ||
1379 | static int | |
1380 | get_serial_info(struct cyclades_port * info, | |
1381 | struct serial_struct * retinfo) | |
1382 | { | |
1383 | struct serial_struct tmp; | |
1384 | ||
1385 | /* CP('g'); */ | |
1386 | if (!retinfo) | |
1387 | return -EFAULT; | |
1388 | memset(&tmp, 0, sizeof(tmp)); | |
1389 | tmp.type = info->type; | |
1390 | tmp.line = info->line; | |
1391 | tmp.port = info->line; | |
1392 | tmp.irq = 0; | |
1393 | tmp.flags = info->flags; | |
1394 | tmp.baud_base = 0; /*!!!*/ | |
1395 | tmp.close_delay = info->close_delay; | |
1396 | tmp.custom_divisor = 0; /*!!!*/ | |
1397 | tmp.hub6 = 0; /*!!!*/ | |
1398 | return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0; | |
1399 | } /* get_serial_info */ | |
1400 | ||
1401 | static int | |
1402 | set_serial_info(struct cyclades_port * info, | |
1403 | struct serial_struct * new_info) | |
1404 | { | |
1405 | struct serial_struct new_serial; | |
1406 | struct cyclades_port old_info; | |
1407 | ||
1408 | /* CP('s'); */ | |
1409 | if (!new_info) | |
1410 | return -EFAULT; | |
1411 | if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) | |
1412 | return -EFAULT; | |
1413 | old_info = *info; | |
1414 | ||
1415 | if (!capable(CAP_SYS_ADMIN)) { | |
1416 | if ((new_serial.close_delay != info->close_delay) || | |
1417 | ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != | |
1418 | (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))) | |
1419 | return -EPERM; | |
1420 | info->flags = ((info->flags & ~ASYNC_USR_MASK) | | |
1421 | (new_serial.flags & ASYNC_USR_MASK)); | |
1422 | goto check_and_exit; | |
1423 | } | |
1424 | ||
1425 | ||
1426 | /* | |
1427 | * OK, past this point, all the error checking has been done. | |
1428 | * At this point, we start making changes..... | |
1429 | */ | |
1430 | ||
1431 | info->flags = ((info->flags & ~ASYNC_FLAGS) | | |
1432 | (new_serial.flags & ASYNC_FLAGS)); | |
1433 | info->close_delay = new_serial.close_delay; | |
1434 | ||
1435 | ||
1436 | check_and_exit: | |
1437 | if (info->flags & ASYNC_INITIALIZED){ | |
1438 | config_setup(info); | |
1439 | return 0; | |
1440 | }else{ | |
1441 | return startup(info); | |
1442 | } | |
1443 | } /* set_serial_info */ | |
1444 | ||
1445 | static int | |
1446 | cy_tiocmget(struct tty_struct *tty, struct file *file) | |
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; | |
1452 | unsigned char status; | |
1453 | unsigned int result; | |
1454 | ||
1455 | channel = info->line; | |
1456 | ||
1457 | local_irq_save(flags); | |
1458 | base_addr[CyCAR] = (u_char)channel; | |
1459 | status = base_addr[CyMSVR1] | base_addr[CyMSVR2]; | |
1460 | local_irq_restore(flags); | |
1461 | ||
1462 | return ((status & CyRTS) ? TIOCM_RTS : 0) | |
1463 | | ((status & CyDTR) ? TIOCM_DTR : 0) | |
1464 | | ((status & CyDCD) ? TIOCM_CAR : 0) | |
1465 | | ((status & CyDSR) ? TIOCM_DSR : 0) | |
1466 | | ((status & CyCTS) ? TIOCM_CTS : 0); | |
1467 | } /* cy_tiocmget */ | |
1468 | ||
1469 | static int | |
1470 | cy_tiocmset(struct tty_struct *tty, struct file *file, | |
1471 | unsigned int set, unsigned int clear) | |
1472 | { | |
1473 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1474 | int channel; | |
1475 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1476 | unsigned long flags; | |
1477 | unsigned int arg; | |
1478 | ||
1479 | channel = info->line; | |
1480 | ||
1481 | if (set & TIOCM_RTS){ | |
1482 | local_irq_save(flags); | |
1483 | base_addr[CyCAR] = (u_char)channel; | |
1484 | base_addr[CyMSVR1] = CyRTS; | |
1485 | local_irq_restore(flags); | |
1486 | } | |
1487 | if (set & TIOCM_DTR){ | |
1488 | local_irq_save(flags); | |
1489 | base_addr[CyCAR] = (u_char)channel; | |
1490 | /* CP('S');CP('2'); */ | |
1491 | base_addr[CyMSVR2] = CyDTR; | |
1492 | #ifdef SERIAL_DEBUG_DTR | |
1493 | printk("cyc: %d: raising DTR\n", __LINE__); | |
1494 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1495 | #endif | |
1496 | local_irq_restore(flags); | |
1497 | } | |
1498 | ||
1499 | if (clear & TIOCM_RTS){ | |
1500 | local_irq_save(flags); | |
1501 | base_addr[CyCAR] = (u_char)channel; | |
1502 | base_addr[CyMSVR1] = 0; | |
1503 | local_irq_restore(flags); | |
1504 | } | |
1505 | if (clear & TIOCM_DTR){ | |
1506 | local_irq_save(flags); | |
1507 | base_addr[CyCAR] = (u_char)channel; | |
1508 | /* CP('C');CP('2'); */ | |
1509 | base_addr[CyMSVR2] = 0; | |
1510 | #ifdef SERIAL_DEBUG_DTR | |
1511 | printk("cyc: %d: dropping DTR\n", __LINE__); | |
1512 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1513 | #endif | |
1514 | local_irq_restore(flags); | |
1515 | } | |
1516 | ||
1517 | return 0; | |
1518 | } /* set_modem_info */ | |
1519 | ||
1520 | static void | |
1521 | send_break( struct cyclades_port * info, int duration) | |
1522 | { /* Let the transmit ISR take care of this (since it | |
1523 | requires stuffing characters into the output stream). | |
1524 | */ | |
1525 | info->x_break = duration; | |
1526 | if (!info->xmit_cnt ) { | |
1527 | start_xmit(info); | |
1528 | } | |
1529 | } /* send_break */ | |
1530 | ||
1531 | static int | |
1532 | get_mon_info(struct cyclades_port * info, struct cyclades_monitor * mon) | |
1533 | { | |
1534 | ||
1535 | if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) | |
1536 | return -EFAULT; | |
1537 | info->mon.int_count = 0; | |
1538 | info->mon.char_count = 0; | |
1539 | info->mon.char_max = 0; | |
1540 | info->mon.char_last = 0; | |
1541 | return 0; | |
1542 | } | |
1543 | ||
1544 | static int | |
1545 | set_threshold(struct cyclades_port * info, unsigned long *arg) | |
1546 | { | |
1547 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1548 | unsigned long value; | |
1549 | int channel; | |
1550 | ||
1551 | if (get_user(value, arg)) | |
1552 | return -EFAULT; | |
1553 | ||
1554 | channel = info->line; | |
1555 | info->cor4 &= ~CyREC_FIFO; | |
1556 | info->cor4 |= value & CyREC_FIFO; | |
1557 | base_addr[CyCOR4] = info->cor4; | |
1558 | return 0; | |
1559 | } | |
1560 | ||
1561 | static int | |
1562 | get_threshold(struct cyclades_port * info, unsigned long *value) | |
1563 | { | |
1564 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1565 | int channel; | |
1566 | unsigned long tmp; | |
1567 | ||
1568 | channel = info->line; | |
1569 | ||
1570 | tmp = base_addr[CyCOR4] & CyREC_FIFO; | |
1571 | return put_user(tmp,value); | |
1572 | } | |
1573 | ||
1574 | static int | |
1575 | set_default_threshold(struct cyclades_port * info, unsigned long *arg) | |
1576 | { | |
1577 | unsigned long value; | |
1578 | ||
1579 | if (get_user(value, arg)) | |
1580 | return -EFAULT; | |
1581 | ||
1582 | info->default_threshold = value & 0x0f; | |
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | static int | |
1587 | get_default_threshold(struct cyclades_port * info, unsigned long *value) | |
1588 | { | |
1589 | return put_user(info->default_threshold,value); | |
1590 | } | |
1591 | ||
1592 | static int | |
1593 | set_timeout(struct cyclades_port * info, unsigned long *arg) | |
1594 | { | |
1595 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1596 | int channel; | |
1597 | unsigned long value; | |
1598 | ||
1599 | if (get_user(value, arg)) | |
1600 | return -EFAULT; | |
1601 | ||
1602 | channel = info->line; | |
1603 | ||
1604 | base_addr[CyRTPRL] = value & 0xff; | |
1605 | base_addr[CyRTPRH] = (value >> 8) & 0xff; | |
1606 | return 0; | |
1607 | } | |
1608 | ||
1609 | static int | |
1610 | get_timeout(struct cyclades_port * info, unsigned long *value) | |
1611 | { | |
1612 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
1613 | int channel; | |
1614 | unsigned long tmp; | |
1615 | ||
1616 | channel = info->line; | |
1617 | ||
1618 | tmp = base_addr[CyRTPRL]; | |
1619 | return put_user(tmp,value); | |
1620 | } | |
1621 | ||
1622 | static int | |
1623 | set_default_timeout(struct cyclades_port * info, unsigned long value) | |
1624 | { | |
1625 | info->default_timeout = value & 0xff; | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | static int | |
1630 | get_default_timeout(struct cyclades_port * info, unsigned long *value) | |
1631 | { | |
1632 | return put_user(info->default_timeout,value); | |
1633 | } | |
1634 | ||
1635 | static int | |
1636 | cy_ioctl(struct tty_struct *tty, struct file * file, | |
1637 | unsigned int cmd, unsigned long arg) | |
1638 | { | |
1639 | unsigned long val; | |
1640 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1641 | int ret_val = 0; | |
1642 | ||
1643 | #ifdef SERIAL_DEBUG_OTHER | |
1644 | printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */ | |
1645 | #endif | |
1646 | ||
1647 | switch (cmd) { | |
1648 | case CYGETMON: | |
1649 | ret_val = get_mon_info(info, (struct cyclades_monitor *)arg); | |
1650 | break; | |
1651 | case CYGETTHRESH: | |
1652 | ret_val = get_threshold(info, (unsigned long *)arg); | |
1653 | break; | |
1654 | case CYSETTHRESH: | |
1655 | ret_val = set_threshold(info, (unsigned long *)arg); | |
1656 | break; | |
1657 | case CYGETDEFTHRESH: | |
1658 | ret_val = get_default_threshold(info, (unsigned long *)arg); | |
1659 | break; | |
1660 | case CYSETDEFTHRESH: | |
1661 | ret_val = set_default_threshold(info, (unsigned long *)arg); | |
1662 | break; | |
1663 | case CYGETTIMEOUT: | |
1664 | ret_val = get_timeout(info, (unsigned long *)arg); | |
1665 | break; | |
1666 | case CYSETTIMEOUT: | |
1667 | ret_val = set_timeout(info, (unsigned long *)arg); | |
1668 | break; | |
1669 | case CYGETDEFTIMEOUT: | |
1670 | ret_val = get_default_timeout(info, (unsigned long *)arg); | |
1671 | break; | |
1672 | case CYSETDEFTIMEOUT: | |
1673 | ret_val = set_default_timeout(info, (unsigned long)arg); | |
1674 | break; | |
1675 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1676 | ret_val = tty_check_change(tty); | |
1677 | if (ret_val) | |
1678 | break; | |
1679 | tty_wait_until_sent(tty,0); | |
1680 | if (!arg) | |
1681 | send_break(info, HZ/4); /* 1/4 second */ | |
1682 | break; | |
1683 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1684 | ret_val = tty_check_change(tty); | |
1685 | if (ret_val) | |
1686 | break; | |
1687 | tty_wait_until_sent(tty,0); | |
1688 | send_break(info, arg ? arg*(HZ/10) : HZ/4); | |
1689 | break; | |
1690 | ||
1691 | /* The following commands are incompletely implemented!!! */ | |
1692 | case TIOCGSOFTCAR: | |
1693 | ret_val = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg); | |
1694 | break; | |
1695 | case TIOCSSOFTCAR: | |
1696 | ret_val = get_user(val, (unsigned long *) arg); | |
1697 | if (ret_val) | |
1698 | break; | |
1699 | tty->termios->c_cflag = | |
1700 | ((tty->termios->c_cflag & ~CLOCAL) | (val ? CLOCAL : 0)); | |
1701 | break; | |
1702 | case TIOCGSERIAL: | |
1703 | ret_val = get_serial_info(info, (struct serial_struct *) arg); | |
1704 | break; | |
1705 | case TIOCSSERIAL: | |
1706 | ret_val = set_serial_info(info, | |
1707 | (struct serial_struct *) arg); | |
1708 | break; | |
1709 | default: | |
1710 | ret_val = -ENOIOCTLCMD; | |
1711 | } | |
1712 | ||
1713 | #ifdef SERIAL_DEBUG_OTHER | |
1714 | printk("cy_ioctl done\n"); | |
1715 | #endif | |
1716 | ||
1717 | return ret_val; | |
1718 | } /* cy_ioctl */ | |
1719 | ||
1720 | ||
1721 | ||
1722 | ||
1723 | static void | |
1724 | cy_set_termios(struct tty_struct *tty, struct termios * old_termios) | |
1725 | { | |
1726 | struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; | |
1727 | ||
1728 | #ifdef SERIAL_DEBUG_OTHER | |
1729 | printk("cy_set_termios %s\n", tty->name); | |
1730 | #endif | |
1731 | ||
1732 | if (tty->termios->c_cflag == old_termios->c_cflag) | |
1733 | return; | |
1734 | config_setup(info); | |
1735 | ||
1736 | if ((old_termios->c_cflag & CRTSCTS) && | |
1737 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1738 | tty->stopped = 0; | |
1739 | cy_start(tty); | |
1740 | } | |
1741 | #ifdef tytso_patch_94Nov25_1726 | |
1742 | if (!(old_termios->c_cflag & CLOCAL) && | |
1743 | (tty->termios->c_cflag & CLOCAL)) | |
1744 | wake_up_interruptible(&info->open_wait); | |
1745 | #endif | |
1746 | ||
1747 | return; | |
1748 | } /* cy_set_termios */ | |
1749 | ||
1750 | ||
1751 | static void | |
1752 | cy_close(struct tty_struct * tty, struct file * filp) | |
1753 | { | |
1754 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1755 | ||
1756 | /* CP('C'); */ | |
1757 | #ifdef SERIAL_DEBUG_OTHER | |
1758 | printk("cy_close %s\n", tty->name); | |
1759 | #endif | |
1760 | ||
1761 | if (!info | |
1762 | || serial_paranoia_check(info, tty->name, "cy_close")){ | |
1763 | return; | |
1764 | } | |
1765 | #ifdef SERIAL_DEBUG_OPEN | |
1766 | printk("cy_close %s, count = %d\n", tty->name, info->count); | |
1767 | #endif | |
1768 | ||
1769 | if ((tty->count == 1) && (info->count != 1)) { | |
1770 | /* | |
1771 | * Uh, oh. tty->count is 1, which means that the tty | |
1772 | * structure will be freed. Info->count should always | |
1773 | * be one in these conditions. If it's greater than | |
1774 | * one, we've got real problems, since it means the | |
1775 | * serial port won't be shutdown. | |
1776 | */ | |
1777 | printk("cy_close: bad serial port count; tty->count is 1, " | |
1778 | "info->count is %d\n", info->count); | |
1779 | info->count = 1; | |
1780 | } | |
1781 | #ifdef SERIAL_DEBUG_COUNT | |
1782 | printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count - 1); | |
1783 | #endif | |
1784 | if (--info->count < 0) { | |
1785 | printk("cy_close: bad serial port count for ttys%d: %d\n", | |
1786 | info->line, info->count); | |
1787 | #ifdef SERIAL_DEBUG_COUNT | |
1788 | printk("cyc: %d: setting count to 0\n", __LINE__); | |
1789 | #endif | |
1790 | info->count = 0; | |
1791 | } | |
1792 | if (info->count) | |
1793 | return; | |
1794 | info->flags |= ASYNC_CLOSING; | |
1795 | if (info->flags & ASYNC_INITIALIZED) | |
1796 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ | |
1797 | shutdown(info); | |
1798 | if (tty->driver->flush_buffer) | |
1799 | tty->driver->flush_buffer(tty); | |
1800 | tty_ldisc_flush(tty); | |
1801 | info->event = 0; | |
1802 | info->tty = 0; | |
1803 | if (info->blocked_open) { | |
1804 | if (info->close_delay) { | |
1805 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); | |
1806 | } | |
1807 | wake_up_interruptible(&info->open_wait); | |
1808 | } | |
1809 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1810 | wake_up_interruptible(&info->close_wait); | |
1811 | ||
1812 | #ifdef SERIAL_DEBUG_OTHER | |
1813 | printk("cy_close done\n"); | |
1814 | #endif | |
1815 | ||
1816 | return; | |
1817 | } /* cy_close */ | |
1818 | ||
1819 | /* | |
1820 | * cy_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1821 | */ | |
1822 | void | |
1823 | cy_hangup(struct tty_struct *tty) | |
1824 | { | |
1825 | struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; | |
1826 | ||
1827 | #ifdef SERIAL_DEBUG_OTHER | |
1828 | printk("cy_hangup %s\n", tty->name); /* */ | |
1829 | #endif | |
1830 | ||
1831 | if (serial_paranoia_check(info, tty->name, "cy_hangup")) | |
1832 | return; | |
1833 | ||
1834 | shutdown(info); | |
1835 | #if 0 | |
1836 | info->event = 0; | |
1837 | info->count = 0; | |
1838 | #ifdef SERIAL_DEBUG_COUNT | |
1839 | printk("cyc: %d: setting count to 0\n", __LINE__); | |
1840 | #endif | |
1841 | info->tty = 0; | |
1842 | #endif | |
1843 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1844 | wake_up_interruptible(&info->open_wait); | |
1845 | } /* cy_hangup */ | |
1846 | ||
1847 | ||
1848 | ||
1849 | /* | |
1850 | * ------------------------------------------------------------ | |
1851 | * cy_open() and friends | |
1852 | * ------------------------------------------------------------ | |
1853 | */ | |
1854 | ||
1855 | static int | |
1856 | block_til_ready(struct tty_struct *tty, struct file * filp, | |
1857 | struct cyclades_port *info) | |
1858 | { | |
1859 | DECLARE_WAITQUEUE(wait, current); | |
1860 | unsigned long flags; | |
1861 | int channel; | |
1862 | int retval; | |
1863 | volatile u_char *base_addr = (u_char *)BASE_ADDR; | |
1864 | ||
1865 | /* | |
1866 | * If the device is in the middle of being closed, then block | |
1867 | * until it's done, and then try again. | |
1868 | */ | |
1869 | if (info->flags & ASYNC_CLOSING) { | |
1870 | interruptible_sleep_on(&info->close_wait); | |
1871 | if (info->flags & ASYNC_HUP_NOTIFY){ | |
1872 | return -EAGAIN; | |
1873 | }else{ | |
1874 | return -ERESTARTSYS; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | /* | |
1879 | * If non-blocking mode is set, then make the check up front | |
1880 | * and then exit. | |
1881 | */ | |
1882 | if (filp->f_flags & O_NONBLOCK) { | |
1883 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1884 | return 0; | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * Block waiting for the carrier detect and the line to become | |
1889 | * free (i.e., not in use by the callout). While we are in | |
1890 | * this loop, info->count is dropped by one, so that | |
1891 | * cy_close() knows when to free things. We restore it upon | |
1892 | * exit, either normal or abnormal. | |
1893 | */ | |
1894 | retval = 0; | |
1895 | add_wait_queue(&info->open_wait, &wait); | |
1896 | #ifdef SERIAL_DEBUG_OPEN | |
1897 | printk("block_til_ready before block: %s, count = %d\n", | |
1898 | tty->name, info->count);/**/ | |
1899 | #endif | |
1900 | info->count--; | |
1901 | #ifdef SERIAL_DEBUG_COUNT | |
1902 | printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count); | |
1903 | #endif | |
1904 | info->blocked_open++; | |
1905 | ||
1906 | channel = info->line; | |
1907 | ||
1908 | while (1) { | |
1909 | local_irq_save(flags); | |
1910 | base_addr[CyCAR] = (u_char)channel; | |
1911 | base_addr[CyMSVR1] = CyRTS; | |
1912 | /* CP('S');CP('4'); */ | |
1913 | base_addr[CyMSVR2] = CyDTR; | |
1914 | #ifdef SERIAL_DEBUG_DTR | |
1915 | printk("cyc: %d: raising DTR\n", __LINE__); | |
1916 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); | |
1917 | #endif | |
1918 | local_irq_restore(flags); | |
1919 | set_current_state(TASK_INTERRUPTIBLE); | |
1920 | if (tty_hung_up_p(filp) | |
1921 | || !(info->flags & ASYNC_INITIALIZED) ){ | |
1922 | if (info->flags & ASYNC_HUP_NOTIFY) { | |
1923 | retval = -EAGAIN; | |
1924 | }else{ | |
1925 | retval = -ERESTARTSYS; | |
1926 | } | |
1927 | break; | |
1928 | } | |
1929 | local_irq_save(flags); | |
1930 | base_addr[CyCAR] = (u_char)channel; | |
1931 | /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */ | |
1932 | if (!(info->flags & ASYNC_CLOSING) | |
1933 | && (C_CLOCAL(tty) | |
1934 | || (base_addr[CyMSVR1] & CyDCD))) { | |
1935 | local_irq_restore(flags); | |
1936 | break; | |
1937 | } | |
1938 | local_irq_restore(flags); | |
1939 | if (signal_pending(current)) { | |
1940 | retval = -ERESTARTSYS; | |
1941 | break; | |
1942 | } | |
1943 | #ifdef SERIAL_DEBUG_OPEN | |
1944 | printk("block_til_ready blocking: %s, count = %d\n", | |
1945 | tty->name, info->count);/**/ | |
1946 | #endif | |
1947 | schedule(); | |
1948 | } | |
1949 | current->state = TASK_RUNNING; | |
1950 | remove_wait_queue(&info->open_wait, &wait); | |
1951 | if (!tty_hung_up_p(filp)){ | |
1952 | info->count++; | |
1953 | #ifdef SERIAL_DEBUG_COUNT | |
1954 | printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); | |
1955 | #endif | |
1956 | } | |
1957 | info->blocked_open--; | |
1958 | #ifdef SERIAL_DEBUG_OPEN | |
1959 | printk("block_til_ready after blocking: %s, count = %d\n", | |
1960 | tty->name, info->count);/**/ | |
1961 | #endif | |
1962 | if (retval) | |
1963 | return retval; | |
1964 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1965 | return 0; | |
1966 | } /* block_til_ready */ | |
1967 | ||
1968 | /* | |
1969 | * This routine is called whenever a serial port is opened. It | |
1970 | * performs the serial-specific initialization for the tty structure. | |
1971 | */ | |
1972 | int | |
1973 | cy_open(struct tty_struct *tty, struct file * filp) | |
1974 | { | |
1975 | struct cyclades_port *info; | |
1976 | int retval, line; | |
1977 | ||
1978 | /* CP('O'); */ | |
1979 | line = tty->index; | |
1980 | if ((line < 0) || (NR_PORTS <= line)){ | |
1981 | return -ENODEV; | |
1982 | } | |
1983 | info = &cy_port[line]; | |
1984 | if (info->line < 0){ | |
1985 | return -ENODEV; | |
1986 | } | |
1987 | #ifdef SERIAL_DEBUG_OTHER | |
1988 | printk("cy_open %s\n", tty->name); /* */ | |
1989 | #endif | |
1990 | if (serial_paranoia_check(info, tty->name, "cy_open")){ | |
1991 | return -ENODEV; | |
1992 | } | |
1993 | #ifdef SERIAL_DEBUG_OPEN | |
1994 | printk("cy_open %s, count = %d\n", tty->name, info->count);/**/ | |
1995 | #endif | |
1996 | info->count++; | |
1997 | #ifdef SERIAL_DEBUG_COUNT | |
1998 | printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); | |
1999 | #endif | |
2000 | tty->driver_data = info; | |
2001 | info->tty = tty; | |
2002 | ||
2003 | if (!tmp_buf) { | |
2004 | tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL); | |
2005 | if (!tmp_buf){ | |
2006 | return -ENOMEM; | |
2007 | } | |
2008 | } | |
2009 | ||
2010 | /* | |
2011 | * Start up serial port | |
2012 | */ | |
2013 | retval = startup(info); | |
2014 | if (retval){ | |
2015 | return retval; | |
2016 | } | |
2017 | ||
2018 | retval = block_til_ready(tty, filp, info); | |
2019 | if (retval) { | |
2020 | #ifdef SERIAL_DEBUG_OPEN | |
2021 | printk("cy_open returning after block_til_ready with %d\n", | |
2022 | retval); | |
2023 | #endif | |
2024 | return retval; | |
2025 | } | |
2026 | ||
2027 | #ifdef SERIAL_DEBUG_OPEN | |
2028 | printk("cy_open done\n");/**/ | |
2029 | #endif | |
2030 | return 0; | |
2031 | } /* cy_open */ | |
2032 | ||
2033 | ||
2034 | ||
2035 | /* | |
2036 | * --------------------------------------------------------------------- | |
2037 | * serial167_init() and friends | |
2038 | * | |
2039 | * serial167_init() is called at boot-time to initialize the serial driver. | |
2040 | * --------------------------------------------------------------------- | |
2041 | */ | |
2042 | ||
2043 | /* | |
2044 | * This routine prints out the appropriate serial driver version | |
2045 | * number, and identifies which options were configured into this | |
2046 | * driver. | |
2047 | */ | |
2048 | static void | |
2049 | show_version(void) | |
2050 | { | |
2051 | printk("MVME166/167 cd2401 driver\n"); | |
2052 | } /* show_version */ | |
2053 | ||
2054 | /* initialize chips on card -- return number of valid | |
2055 | chips (which is number of ports/4) */ | |
2056 | ||
2057 | /* | |
2058 | * This initialises the hardware to a reasonable state. It should | |
2059 | * probe the chip first so as to copy 166-Bug setup as a default for | |
2060 | * port 0. It initialises CMR to CyASYNC; that is never done again, so | |
2061 | * as to limit the number of CyINIT_CHAN commands in normal running. | |
2062 | * | |
2063 | * ... I wonder what I should do if this fails ... | |
2064 | */ | |
2065 | ||
2066 | void | |
2067 | mvme167_serial_console_setup(int cflag) | |
2068 | { | |
2069 | volatile unsigned char* base_addr = (u_char *)BASE_ADDR; | |
2070 | int ch; | |
2071 | u_char spd; | |
2072 | u_char rcor, rbpr, badspeed = 0; | |
2073 | unsigned long flags; | |
2074 | ||
2075 | local_irq_save(flags); | |
2076 | ||
2077 | /* | |
2078 | * First probe channel zero of the chip, to see what speed has | |
2079 | * been selected. | |
2080 | */ | |
2081 | ||
2082 | base_addr[CyCAR] = 0; | |
2083 | ||
2084 | rcor = base_addr[CyRCOR] << 5; | |
2085 | rbpr = base_addr[CyRBPR]; | |
2086 | ||
2087 | for (spd = 0; spd < sizeof(baud_bpr); spd++) | |
2088 | if (rbpr == baud_bpr[spd] && rcor == baud_co[spd]) | |
2089 | break; | |
2090 | if (spd >= sizeof(baud_bpr)) { | |
2091 | spd = 14; /* 19200 */ | |
2092 | badspeed = 1; /* Failed to identify speed */ | |
2093 | } | |
2094 | initial_console_speed = spd; | |
2095 | ||
2096 | /* OK, we have chosen a speed, now reset and reinitialise */ | |
2097 | ||
2098 | my_udelay(20000L); /* Allow time for any active o/p to complete */ | |
2099 | if(base_addr[CyCCR] != 0x00){ | |
2100 | local_irq_restore(flags); | |
2101 | /* printk(" chip is never idle (CCR != 0)\n"); */ | |
2102 | return; | |
2103 | } | |
2104 | ||
2105 | base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */ | |
2106 | my_udelay(1000L); | |
2107 | ||
2108 | if(base_addr[CyGFRCR] == 0x00){ | |
2109 | local_irq_restore(flags); | |
2110 | /* printk(" chip is not responding (GFRCR stayed 0)\n"); */ | |
2111 | return; | |
2112 | } | |
2113 | ||
2114 | /* | |
2115 | * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms | |
2116 | * tick | |
2117 | */ | |
2118 | ||
2119 | base_addr[CyTPR] = 10; | |
2120 | ||
2121 | base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */ | |
2122 | base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */ | |
2123 | base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */ | |
2124 | ||
2125 | /* | |
2126 | * Attempt to set up all channels to something reasonable, and | |
2127 | * bang out a INIT_CHAN command. We should then be able to limit | |
2128 | * the ammount of fiddling we have to do in normal running. | |
2129 | */ | |
2130 | ||
2131 | for (ch = 3; ch >= 0 ; ch--) { | |
2132 | base_addr[CyCAR] = (u_char)ch; | |
2133 | base_addr[CyIER] = 0; | |
2134 | base_addr[CyCMR] = CyASYNC; | |
2135 | base_addr[CyLICR] = (u_char)ch << 2; | |
2136 | base_addr[CyLIVR] = 0x5c; | |
2137 | base_addr[CyTCOR] = baud_co[spd]; | |
2138 | base_addr[CyTBPR] = baud_bpr[spd]; | |
2139 | base_addr[CyRCOR] = baud_co[spd] >> 5; | |
2140 | base_addr[CyRBPR] = baud_bpr[spd]; | |
2141 | base_addr[CySCHR1] = 'Q' & 0x1f; | |
2142 | base_addr[CySCHR2] = 'X' & 0x1f; | |
2143 | base_addr[CySCRL] = 0; | |
2144 | base_addr[CySCRH] = 0; | |
2145 | base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE; | |
2146 | base_addr[CyCOR2] = 0; | |
2147 | base_addr[CyCOR3] = Cy_1_STOP; | |
2148 | base_addr[CyCOR4] = baud_cor4[spd]; | |
2149 | base_addr[CyCOR5] = 0; | |
2150 | base_addr[CyCOR6] = 0; | |
2151 | base_addr[CyCOR7] = 0; | |
2152 | base_addr[CyRTPRL] = 2; | |
2153 | base_addr[CyRTPRH] = 0; | |
2154 | base_addr[CyMSVR1] = 0; | |
2155 | base_addr[CyMSVR2] = 0; | |
2156 | write_cy_cmd(base_addr,CyINIT_CHAN|CyDIS_RCVR|CyDIS_XMTR); | |
2157 | } | |
2158 | ||
2159 | /* | |
2160 | * Now do specials for channel zero.... | |
2161 | */ | |
2162 | ||
2163 | base_addr[CyMSVR1] = CyRTS; | |
2164 | base_addr[CyMSVR2] = CyDTR; | |
2165 | base_addr[CyIER] = CyRxData; | |
2166 | write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR); | |
2167 | ||
2168 | local_irq_restore(flags); | |
2169 | ||
2170 | my_udelay(20000L); /* Let it all settle down */ | |
2171 | ||
2172 | printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]); | |
2173 | if (badspeed) | |
2174 | printk(" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n", | |
2175 | rcor >> 5, rbpr); | |
2176 | } /* serial_console_init */ | |
2177 | ||
2178 | static struct tty_operations cy_ops = { | |
2179 | .open = cy_open, | |
2180 | .close = cy_close, | |
2181 | .write = cy_write, | |
2182 | .put_char = cy_put_char, | |
2183 | .flush_chars = cy_flush_chars, | |
2184 | .write_room = cy_write_room, | |
2185 | .chars_in_buffer = cy_chars_in_buffer, | |
2186 | .flush_buffer = cy_flush_buffer, | |
2187 | .ioctl = cy_ioctl, | |
2188 | .throttle = cy_throttle, | |
2189 | .unthrottle = cy_unthrottle, | |
2190 | .set_termios = cy_set_termios, | |
2191 | .stop = cy_stop, | |
2192 | .start = cy_start, | |
2193 | .hangup = cy_hangup, | |
2194 | .tiocmget = cy_tiocmget, | |
2195 | .tiocmset = cy_tiocmset, | |
2196 | }; | |
2197 | /* The serial driver boot-time initialization code! | |
2198 | Hardware I/O ports are mapped to character special devices on a | |
2199 | first found, first allocated manner. That is, this code searches | |
2200 | for Cyclom cards in the system. As each is found, it is probed | |
2201 | to discover how many chips (and thus how many ports) are present. | |
2202 | These ports are mapped to the tty ports 64 and upward in monotonic | |
2203 | fashion. If an 8-port card is replaced with a 16-port card, the | |
2204 | port mapping on a following card will shift. | |
2205 | ||
2206 | This approach is different from what is used in the other serial | |
2207 | device driver because the Cyclom is more properly a multiplexer, | |
2208 | not just an aggregation of serial ports on one card. | |
2209 | ||
2210 | If there are more cards with more ports than have been statically | |
2211 | allocated above, a warning is printed and the extra ports are ignored. | |
2212 | */ | |
2213 | static int __init | |
2214 | serial167_init(void) | |
2215 | { | |
2216 | struct cyclades_port *info; | |
2217 | int ret = 0; | |
2218 | int good_ports = 0; | |
2219 | int port_num = 0; | |
2220 | int index; | |
2221 | int DefSpeed; | |
2222 | #ifdef notyet | |
2223 | struct sigaction sa; | |
2224 | #endif | |
2225 | ||
2226 | if (!(mvme16x_config &MVME16x_CONFIG_GOT_CD2401)) | |
2227 | return 0; | |
2228 | ||
2229 | cy_serial_driver = alloc_tty_driver(NR_PORTS); | |
2230 | if (!cy_serial_driver) | |
2231 | return -ENOMEM; | |
2232 | ||
2233 | #if 0 | |
2234 | scrn[1] = '\0'; | |
2235 | #endif | |
2236 | ||
2237 | show_version(); | |
2238 | ||
2239 | /* Has "console=0,9600n8" been used in bootinfo to change speed? */ | |
2240 | if (serial_console_cflag) | |
2241 | DefSpeed = serial_console_cflag & 0017; | |
2242 | else { | |
2243 | DefSpeed = initial_console_speed; | |
2244 | serial_console_info = &cy_port[0]; | |
2245 | serial_console_cflag = DefSpeed | CS8; | |
2246 | #if 0 | |
2247 | serial_console = 64; /*callout_driver.minor_start*/ | |
2248 | #endif | |
2249 | } | |
2250 | ||
2251 | /* Initialize the tty_driver structure */ | |
2252 | ||
2253 | cy_serial_driver->owner = THIS_MODULE; | |
2254 | cy_serial_driver->devfs_name = "tts/"; | |
2255 | cy_serial_driver->name = "ttyS"; | |
2256 | cy_serial_driver->major = TTY_MAJOR; | |
2257 | cy_serial_driver->minor_start = 64; | |
2258 | cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2259 | cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
2260 | cy_serial_driver->init_termios = tty_std_termios; | |
2261 | cy_serial_driver->init_termios.c_cflag = | |
2262 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2263 | cy_serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
2264 | tty_set_operations(cy_serial_driver, &cy_ops); | |
2265 | ||
2266 | ret = tty_register_driver(cy_serial_driver); | |
2267 | if (ret) { | |
2268 | printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n"); | |
2269 | put_tty_driver(cy_serial_driver); | |
2270 | return ret; | |
2271 | } | |
2272 | ||
2273 | port_num = 0; | |
2274 | info = cy_port; | |
2275 | for (index = 0; index < 1; index++) { | |
2276 | ||
2277 | good_ports = 4; | |
2278 | ||
2279 | if(port_num < NR_PORTS){ | |
2280 | while( good_ports-- && port_num < NR_PORTS){ | |
2281 | /*** initialize port ***/ | |
2282 | info->magic = CYCLADES_MAGIC; | |
2283 | info->type = PORT_CIRRUS; | |
2284 | info->card = index; | |
2285 | info->line = port_num; | |
2286 | info->flags = STD_COM_FLAGS; | |
2287 | info->tty = 0; | |
2288 | info->xmit_fifo_size = 12; | |
2289 | info->cor1 = CyPARITY_NONE|Cy_8_BITS; | |
2290 | info->cor2 = CyETC; | |
2291 | info->cor3 = Cy_1_STOP; | |
2292 | info->cor4 = 0x08; /* _very_ small receive threshold */ | |
2293 | info->cor5 = 0; | |
2294 | info->cor6 = 0; | |
2295 | info->cor7 = 0; | |
2296 | info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */ | |
2297 | info->tco = baud_co[DefSpeed]; /* Tx CO */ | |
2298 | info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */ | |
2299 | info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */ | |
2300 | info->close_delay = 0; | |
2301 | info->x_char = 0; | |
2302 | info->event = 0; | |
2303 | info->count = 0; | |
2304 | #ifdef SERIAL_DEBUG_COUNT | |
2305 | printk("cyc: %d: setting count to 0\n", __LINE__); | |
2306 | #endif | |
2307 | info->blocked_open = 0; | |
2308 | info->default_threshold = 0; | |
2309 | info->default_timeout = 0; | |
2310 | INIT_WORK(&info->tqueue, do_softint, info); | |
2311 | init_waitqueue_head(&info->open_wait); | |
2312 | init_waitqueue_head(&info->close_wait); | |
2313 | /* info->session */ | |
2314 | /* info->pgrp */ | |
2315 | /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/ | |
2316 | info->read_status_mask = CyTIMEOUT| CySPECHAR| CyBREAK | |
2317 | | CyPARITY| CyFRAME| CyOVERRUN; | |
2318 | /* info->timeout */ | |
2319 | ||
2320 | printk("ttyS%d ", info->line); | |
2321 | port_num++;info++; | |
2322 | if(!(port_num & 7)){ | |
2323 | printk("\n "); | |
2324 | } | |
2325 | } | |
2326 | } | |
2327 | printk("\n"); | |
2328 | } | |
2329 | while( port_num < NR_PORTS){ | |
2330 | info->line = -1; | |
2331 | port_num++;info++; | |
2332 | } | |
2333 | #ifdef CONFIG_REMOTE_DEBUG | |
2334 | debug_setup(); | |
2335 | #endif | |
2336 | ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0, | |
2337 | "cd2401_errors", cd2401_rxerr_interrupt); | |
2338 | if (ret) { | |
2339 | printk(KERN_ERR "Could't get cd2401_errors IRQ"); | |
2340 | goto cleanup_serial_driver; | |
2341 | } | |
2342 | ||
2343 | ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0, | |
2344 | "cd2401_modem", cd2401_modem_interrupt); | |
2345 | if (ret) { | |
2346 | printk(KERN_ERR "Could't get cd2401_modem IRQ"); | |
2347 | goto cleanup_irq_cd2401_errors; | |
2348 | } | |
2349 | ||
2350 | ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0, | |
2351 | "cd2401_txints", cd2401_tx_interrupt); | |
2352 | if (ret) { | |
2353 | printk(KERN_ERR "Could't get cd2401_txints IRQ"); | |
2354 | goto cleanup_irq_cd2401_modem; | |
2355 | } | |
2356 | ||
2357 | ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0, | |
2358 | "cd2401_rxints", cd2401_rx_interrupt); | |
2359 | if (ret) { | |
2360 | printk(KERN_ERR "Could't get cd2401_rxints IRQ"); | |
2361 | goto cleanup_irq_cd2401_txints; | |
2362 | } | |
2363 | ||
2364 | /* Now we have registered the interrupt handlers, allow the interrupts */ | |
2365 | ||
2366 | pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */ | |
2367 | pcc2chip[PccSCCTICR] = 0x15; | |
2368 | pcc2chip[PccSCCRICR] = 0x15; | |
2369 | ||
2370 | pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */ | |
2371 | ||
2372 | return 0; | |
2373 | cleanup_irq_cd2401_txints: | |
2374 | free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt); | |
2375 | cleanup_irq_cd2401_modem: | |
2376 | free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt); | |
2377 | cleanup_irq_cd2401_errors: | |
2378 | free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt); | |
2379 | cleanup_serial_driver: | |
2380 | if (tty_unregister_driver(cy_serial_driver)) | |
2381 | printk(KERN_ERR "Couldn't unregister MVME166/7 serial driver\n"); | |
2382 | put_tty_driver(cy_serial_driver); | |
2383 | return ret; | |
2384 | } /* serial167_init */ | |
2385 | ||
2386 | module_init(serial167_init); | |
2387 | ||
2388 | ||
2389 | #ifdef CYCLOM_SHOW_STATUS | |
2390 | static void | |
2391 | show_status(int line_num) | |
2392 | { | |
2393 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2394 | int channel; | |
2395 | struct cyclades_port * info; | |
2396 | unsigned long flags; | |
2397 | ||
2398 | info = &cy_port[line_num]; | |
2399 | channel = info->line; | |
2400 | printk(" channel %d\n", channel);/**/ | |
2401 | ||
2402 | printk(" cy_port\n"); | |
2403 | printk(" card line flags = %d %d %x\n", | |
2404 | info->card, info->line, info->flags); | |
2405 | printk(" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n", | |
2406 | (long)info->tty, info->read_status_mask, | |
2407 | info->timeout, info->xmit_fifo_size); | |
2408 | printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n", | |
2409 | info->cor1, info->cor2, info->cor3, info->cor4, info->cor5, | |
2410 | info->cor6, info->cor7); | |
2411 | printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", | |
2412 | info->tbpr, info->tco, info->rbpr, info->rco); | |
2413 | printk(" close_delay event count = %d %d %d\n", | |
2414 | info->close_delay, info->event, info->count); | |
2415 | printk(" x_char blocked_open = %x %x\n", | |
2416 | info->x_char, info->blocked_open); | |
2417 | printk(" open_wait = %lx %lx %lx\n", | |
2418 | (long)info->open_wait); | |
2419 | ||
2420 | ||
2421 | local_irq_save(flags); | |
2422 | ||
2423 | /* Global Registers */ | |
2424 | ||
2425 | printk(" CyGFRCR %x\n", base_addr[CyGFRCR]); | |
2426 | printk(" CyCAR %x\n", base_addr[CyCAR]); | |
2427 | printk(" CyRISR %x\n", base_addr[CyRISR]); | |
2428 | printk(" CyTISR %x\n", base_addr[CyTISR]); | |
2429 | printk(" CyMISR %x\n", base_addr[CyMISR]); | |
2430 | printk(" CyRIR %x\n", base_addr[CyRIR]); | |
2431 | printk(" CyTIR %x\n", base_addr[CyTIR]); | |
2432 | printk(" CyMIR %x\n", base_addr[CyMIR]); | |
2433 | printk(" CyTPR %x\n", base_addr[CyTPR]); | |
2434 | ||
2435 | base_addr[CyCAR] = (u_char)channel; | |
2436 | ||
2437 | /* Virtual Registers */ | |
2438 | ||
2439 | #if 0 | |
2440 | printk(" CyRIVR %x\n", base_addr[CyRIVR]); | |
2441 | printk(" CyTIVR %x\n", base_addr[CyTIVR]); | |
2442 | printk(" CyMIVR %x\n", base_addr[CyMIVR]); | |
2443 | printk(" CyMISR %x\n", base_addr[CyMISR]); | |
2444 | #endif | |
2445 | ||
2446 | /* Channel Registers */ | |
2447 | ||
2448 | printk(" CyCCR %x\n", base_addr[CyCCR]); | |
2449 | printk(" CyIER %x\n", base_addr[CyIER]); | |
2450 | printk(" CyCOR1 %x\n", base_addr[CyCOR1]); | |
2451 | printk(" CyCOR2 %x\n", base_addr[CyCOR2]); | |
2452 | printk(" CyCOR3 %x\n", base_addr[CyCOR3]); | |
2453 | printk(" CyCOR4 %x\n", base_addr[CyCOR4]); | |
2454 | printk(" CyCOR5 %x\n", base_addr[CyCOR5]); | |
2455 | #if 0 | |
2456 | printk(" CyCCSR %x\n", base_addr[CyCCSR]); | |
2457 | printk(" CyRDCR %x\n", base_addr[CyRDCR]); | |
2458 | #endif | |
2459 | printk(" CySCHR1 %x\n", base_addr[CySCHR1]); | |
2460 | printk(" CySCHR2 %x\n", base_addr[CySCHR2]); | |
2461 | #if 0 | |
2462 | printk(" CySCHR3 %x\n", base_addr[CySCHR3]); | |
2463 | printk(" CySCHR4 %x\n", base_addr[CySCHR4]); | |
2464 | printk(" CySCRL %x\n", base_addr[CySCRL]); | |
2465 | printk(" CySCRH %x\n", base_addr[CySCRH]); | |
2466 | printk(" CyLNC %x\n", base_addr[CyLNC]); | |
2467 | printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]); | |
2468 | printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]); | |
2469 | #endif | |
2470 | printk(" CyRTPRL %x\n", base_addr[CyRTPRL]); | |
2471 | printk(" CyRTPRH %x\n", base_addr[CyRTPRH]); | |
2472 | printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]); | |
2473 | printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]); | |
2474 | printk(" CyRBPR %x\n", base_addr[CyRBPR]); | |
2475 | printk(" CyRCOR %x\n", base_addr[CyRCOR]); | |
2476 | printk(" CyTBPR %x\n", base_addr[CyTBPR]); | |
2477 | printk(" CyTCOR %x\n", base_addr[CyTCOR]); | |
2478 | ||
2479 | local_irq_restore(flags); | |
2480 | } /* show_status */ | |
2481 | #endif | |
2482 | ||
2483 | ||
2484 | #if 0 | |
2485 | /* Dummy routine in mvme16x/config.c for now */ | |
2486 | ||
2487 | /* Serial console setup. Called from linux/init/main.c */ | |
2488 | ||
2489 | void console_setup(char *str, int *ints) | |
2490 | { | |
2491 | char *s; | |
2492 | int baud, bits, parity; | |
2493 | int cflag = 0; | |
2494 | ||
2495 | /* Sanity check. */ | |
2496 | if (ints[0] > 3 || ints[1] > 3) return; | |
2497 | ||
2498 | /* Get baud, bits and parity */ | |
2499 | baud = 2400; | |
2500 | bits = 8; | |
2501 | parity = 'n'; | |
2502 | if (ints[2]) baud = ints[2]; | |
2503 | if ((s = strchr(str, ','))) { | |
2504 | do { | |
2505 | s++; | |
2506 | } while(*s >= '0' && *s <= '9'); | |
2507 | if (*s) parity = *s++; | |
2508 | if (*s) bits = *s - '0'; | |
2509 | } | |
2510 | ||
2511 | /* Now construct a cflag setting. */ | |
2512 | switch(baud) { | |
2513 | case 1200: | |
2514 | cflag |= B1200; | |
2515 | break; | |
2516 | case 9600: | |
2517 | cflag |= B9600; | |
2518 | break; | |
2519 | case 19200: | |
2520 | cflag |= B19200; | |
2521 | break; | |
2522 | case 38400: | |
2523 | cflag |= B38400; | |
2524 | break; | |
2525 | case 2400: | |
2526 | default: | |
2527 | cflag |= B2400; | |
2528 | break; | |
2529 | } | |
2530 | switch(bits) { | |
2531 | case 7: | |
2532 | cflag |= CS7; | |
2533 | break; | |
2534 | default: | |
2535 | case 8: | |
2536 | cflag |= CS8; | |
2537 | break; | |
2538 | } | |
2539 | switch(parity) { | |
2540 | case 'o': case 'O': | |
2541 | cflag |= PARODD; | |
2542 | break; | |
2543 | case 'e': case 'E': | |
2544 | cflag |= PARENB; | |
2545 | break; | |
2546 | } | |
2547 | ||
2548 | serial_console_info = &cy_port[ints[1]]; | |
2549 | serial_console_cflag = cflag; | |
2550 | serial_console = ints[1] + 64; /*callout_driver.minor_start*/ | |
2551 | } | |
2552 | #endif | |
2553 | ||
2554 | /* | |
2555 | * The following is probably out of date for 2.1.x serial console stuff. | |
2556 | * | |
2557 | * The console is registered early on from arch/m68k/kernel/setup.c, and | |
2558 | * it therefore relies on the chip being setup correctly by 166-Bug. This | |
2559 | * seems reasonable, as the serial port has been used to invoke the system | |
2560 | * boot. It also means that this function must not rely on any data | |
2561 | * initialisation performed by serial167_init() etc. | |
2562 | * | |
2563 | * Of course, once the console has been registered, we had better ensure | |
2564 | * that serial167_init() doesn't leave the chip non-functional. | |
2565 | * | |
2566 | * The console must be locked when we get here. | |
2567 | */ | |
2568 | ||
2569 | void serial167_console_write(struct console *co, const char *str, unsigned count) | |
2570 | { | |
2571 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2572 | unsigned long flags; | |
2573 | volatile u_char sink; | |
2574 | u_char ier; | |
2575 | int port; | |
2576 | u_char do_lf = 0; | |
2577 | int i = 0; | |
2578 | ||
2579 | local_irq_save(flags); | |
2580 | ||
2581 | /* Ensure transmitter is enabled! */ | |
2582 | ||
2583 | port = 0; | |
2584 | base_addr[CyCAR] = (u_char)port; | |
2585 | while (base_addr[CyCCR]) | |
2586 | ; | |
2587 | base_addr[CyCCR] = CyENB_XMTR; | |
2588 | ||
2589 | ier = base_addr[CyIER]; | |
2590 | base_addr[CyIER] = CyTxMpty; | |
2591 | ||
2592 | while (1) { | |
2593 | if (pcc2chip[PccSCCTICR] & 0x20) | |
2594 | { | |
2595 | /* We have a Tx int. Acknowledge it */ | |
2596 | sink = pcc2chip[PccTPIACKR]; | |
2597 | if ((base_addr[CyLICR] >> 2) == port) { | |
2598 | if (i == count) { | |
2599 | /* Last char of string is now output */ | |
2600 | base_addr[CyTEOIR] = CyNOTRANS; | |
2601 | break; | |
2602 | } | |
2603 | if (do_lf) { | |
2604 | base_addr[CyTDR] = '\n'; | |
2605 | str++; | |
2606 | i++; | |
2607 | do_lf = 0; | |
2608 | } | |
2609 | else if (*str == '\n') { | |
2610 | base_addr[CyTDR] = '\r'; | |
2611 | do_lf = 1; | |
2612 | } | |
2613 | else { | |
2614 | base_addr[CyTDR] = *str++; | |
2615 | i++; | |
2616 | } | |
2617 | base_addr[CyTEOIR] = 0; | |
2618 | } | |
2619 | else | |
2620 | base_addr[CyTEOIR] = CyNOTRANS; | |
2621 | } | |
2622 | } | |
2623 | ||
2624 | base_addr[CyIER] = ier; | |
2625 | ||
2626 | local_irq_restore(flags); | |
2627 | } | |
2628 | ||
2629 | static struct tty_driver *serial167_console_device(struct console *c, int *index) | |
2630 | { | |
2631 | *index = c->index; | |
2632 | return cy_serial_driver; | |
2633 | } | |
2634 | ||
2635 | ||
2636 | static int __init serial167_console_setup(struct console *co, char *options) | |
2637 | { | |
2638 | return 0; | |
2639 | } | |
2640 | ||
2641 | ||
2642 | static struct console sercons = { | |
2643 | .name = "ttyS", | |
2644 | .write = serial167_console_write, | |
2645 | .device = serial167_console_device, | |
2646 | .setup = serial167_console_setup, | |
2647 | .flags = CON_PRINTBUFFER, | |
2648 | .index = -1, | |
2649 | }; | |
2650 | ||
2651 | ||
2652 | static int __init serial167_console_init(void) | |
2653 | { | |
2654 | if (vme_brdtype == VME_TYPE_MVME166 || | |
2655 | vme_brdtype == VME_TYPE_MVME167 || | |
2656 | vme_brdtype == VME_TYPE_MVME177) { | |
2657 | mvme167_serial_console_setup(0); | |
2658 | register_console(&sercons); | |
2659 | } | |
2660 | return 0; | |
2661 | } | |
2662 | console_initcall(serial167_console_init); | |
2663 | ||
2664 | #ifdef CONFIG_REMOTE_DEBUG | |
2665 | void putDebugChar (int c) | |
2666 | { | |
2667 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2668 | unsigned long flags; | |
2669 | volatile u_char sink; | |
2670 | u_char ier; | |
2671 | int port; | |
2672 | ||
2673 | local_irq_save(flags); | |
2674 | ||
2675 | /* Ensure transmitter is enabled! */ | |
2676 | ||
2677 | port = DEBUG_PORT; | |
2678 | base_addr[CyCAR] = (u_char)port; | |
2679 | while (base_addr[CyCCR]) | |
2680 | ; | |
2681 | base_addr[CyCCR] = CyENB_XMTR; | |
2682 | ||
2683 | ier = base_addr[CyIER]; | |
2684 | base_addr[CyIER] = CyTxMpty; | |
2685 | ||
2686 | while (1) { | |
2687 | if (pcc2chip[PccSCCTICR] & 0x20) | |
2688 | { | |
2689 | /* We have a Tx int. Acknowledge it */ | |
2690 | sink = pcc2chip[PccTPIACKR]; | |
2691 | if ((base_addr[CyLICR] >> 2) == port) { | |
2692 | base_addr[CyTDR] = c; | |
2693 | base_addr[CyTEOIR] = 0; | |
2694 | break; | |
2695 | } | |
2696 | else | |
2697 | base_addr[CyTEOIR] = CyNOTRANS; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | base_addr[CyIER] = ier; | |
2702 | ||
2703 | local_irq_restore(flags); | |
2704 | } | |
2705 | ||
2706 | int getDebugChar() | |
2707 | { | |
2708 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2709 | unsigned long flags; | |
2710 | volatile u_char sink; | |
2711 | u_char ier; | |
2712 | int port; | |
2713 | int i, c; | |
2714 | ||
2715 | i = debugiq.out; | |
2716 | if (i != debugiq.in) { | |
2717 | c = debugiq.buf[i]; | |
2718 | if (++i == DEBUG_LEN) | |
2719 | i = 0; | |
2720 | debugiq.out = i; | |
2721 | return c; | |
2722 | } | |
2723 | /* OK, nothing in queue, wait in poll loop */ | |
2724 | ||
2725 | local_irq_save(flags); | |
2726 | ||
2727 | /* Ensure receiver is enabled! */ | |
2728 | ||
2729 | port = DEBUG_PORT; | |
2730 | base_addr[CyCAR] = (u_char)port; | |
2731 | #if 0 | |
2732 | while (base_addr[CyCCR]) | |
2733 | ; | |
2734 | base_addr[CyCCR] = CyENB_RCVR; | |
2735 | #endif | |
2736 | ier = base_addr[CyIER]; | |
2737 | base_addr[CyIER] = CyRxData; | |
2738 | ||
2739 | while (1) { | |
2740 | if (pcc2chip[PccSCCRICR] & 0x20) | |
2741 | { | |
2742 | /* We have a Rx int. Acknowledge it */ | |
2743 | sink = pcc2chip[PccRPIACKR]; | |
2744 | if ((base_addr[CyLICR] >> 2) == port) { | |
2745 | int cnt = base_addr[CyRFOC]; | |
2746 | while (cnt-- > 0) | |
2747 | { | |
2748 | c = base_addr[CyRDR]; | |
2749 | if (c == 0) | |
2750 | printk ("!! debug char is null (cnt=%d) !!", cnt); | |
2751 | else | |
2752 | queueDebugChar (c); | |
2753 | } | |
2754 | base_addr[CyREOIR] = 0; | |
2755 | i = debugiq.out; | |
2756 | if (i == debugiq.in) | |
2757 | panic ("Debug input queue empty!"); | |
2758 | c = debugiq.buf[i]; | |
2759 | if (++i == DEBUG_LEN) | |
2760 | i = 0; | |
2761 | debugiq.out = i; | |
2762 | break; | |
2763 | } | |
2764 | else | |
2765 | base_addr[CyREOIR] = CyNOTRANS; | |
2766 | } | |
2767 | } | |
2768 | ||
2769 | base_addr[CyIER] = ier; | |
2770 | ||
2771 | local_irq_restore(flags); | |
2772 | ||
2773 | return (c); | |
2774 | } | |
2775 | ||
2776 | void queueDebugChar (int c) | |
2777 | { | |
2778 | int i; | |
2779 | ||
2780 | i = debugiq.in; | |
2781 | debugiq.buf[i] = c; | |
2782 | if (++i == DEBUG_LEN) | |
2783 | i = 0; | |
2784 | if (i != debugiq.out) | |
2785 | debugiq.in = i; | |
2786 | } | |
2787 | ||
2788 | static void | |
2789 | debug_setup() | |
2790 | { | |
2791 | unsigned long flags; | |
2792 | volatile unsigned char *base_addr = (u_char *)BASE_ADDR; | |
2793 | int i, cflag; | |
2794 | ||
2795 | cflag = B19200; | |
2796 | ||
2797 | local_irq_save(flags); | |
2798 | ||
2799 | for (i = 0; i < 4; i++) | |
2800 | { | |
2801 | base_addr[CyCAR] = i; | |
2802 | base_addr[CyLICR] = i << 2; | |
2803 | } | |
2804 | ||
2805 | debugiq.in = debugiq.out = 0; | |
2806 | ||
2807 | base_addr[CyCAR] = DEBUG_PORT; | |
2808 | ||
2809 | /* baud rate */ | |
2810 | i = cflag & CBAUD; | |
2811 | ||
2812 | base_addr[CyIER] = 0; | |
2813 | ||
2814 | base_addr[CyCMR] = CyASYNC; | |
2815 | base_addr[CyLICR] = DEBUG_PORT << 2; | |
2816 | base_addr[CyLIVR] = 0x5c; | |
2817 | ||
2818 | /* tx and rx baud rate */ | |
2819 | ||
2820 | base_addr[CyTCOR] = baud_co[i]; | |
2821 | base_addr[CyTBPR] = baud_bpr[i]; | |
2822 | base_addr[CyRCOR] = baud_co[i] >> 5; | |
2823 | base_addr[CyRBPR] = baud_bpr[i]; | |
2824 | ||
2825 | /* set line characteristics according configuration */ | |
2826 | ||
2827 | base_addr[CySCHR1] = 0; | |
2828 | base_addr[CySCHR2] = 0; | |
2829 | base_addr[CySCRL] = 0; | |
2830 | base_addr[CySCRH] = 0; | |
2831 | base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE; | |
2832 | base_addr[CyCOR2] = 0; | |
2833 | base_addr[CyCOR3] = Cy_1_STOP; | |
2834 | base_addr[CyCOR4] = baud_cor4[i]; | |
2835 | base_addr[CyCOR5] = 0; | |
2836 | base_addr[CyCOR6] = 0; | |
2837 | base_addr[CyCOR7] = 0; | |
2838 | ||
2839 | write_cy_cmd(base_addr,CyINIT_CHAN); | |
2840 | write_cy_cmd(base_addr,CyENB_RCVR); | |
2841 | ||
2842 | base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */ | |
2843 | ||
2844 | base_addr[CyRTPRL] = 2; | |
2845 | base_addr[CyRTPRH] = 0; | |
2846 | ||
2847 | base_addr[CyMSVR1] = CyRTS; | |
2848 | base_addr[CyMSVR2] = CyDTR; | |
2849 | ||
2850 | base_addr[CyIER] = CyRxData; | |
2851 | ||
2852 | local_irq_restore(flags); | |
2853 | ||
2854 | } /* debug_setup */ | |
2855 | ||
2856 | #endif | |
2857 | ||
2858 | MODULE_LICENSE("GPL"); |