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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/serial167.c | |
3 | * | |
4 | * Driver for MVME166/7 board serial ports, which are via a CD2401. | |
5 | * Based very much on cyclades.c. | |
6 | * | |
7 | * MVME166/7 work by Richard Hirst [richard@sleepie.demon.co.uk] | |
8 | * | |
9 | * ============================================================== | |
10 | * | |
11 | * static char rcsid[] = | |
12 | * "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $"; | |
13 | * | |
14 | * linux/kernel/cyclades.c | |
15 | * | |
16 | * Maintained by Marcio Saito (cyclades@netcom.com) and | |
17 | * Randolph Bentson (bentson@grieg.seaslug.org) | |
18 | * | |
19 | * Much of the design and some of the code came from serial.c | |
20 | * which was copyright (C) 1991, 1992 Linus Torvalds. It was | |
21 | * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, | |
22 | * and then fixed as suggested by Michael K. Johnson 12/12/92. | |
23 | * | |
24 | * This version does not support shared irq's. | |
25 | * | |
26 | * $Log: cyclades.c,v $ | |
27 | * Revision 1.36.1.4 1995/03/29 06:14:14 bentson | |
28 | * disambiguate between Cyclom-16Y and Cyclom-32Ye; | |
29 | * | |
30 | * Changes: | |
31 | * | |
32 | * 200 lines of changes record removed - RGH 11-10-95, starting work on | |
33 | * converting this to drive serial ports on mvme166 (cd2401). | |
34 | * | |
35 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/25 | |
36 | * - get rid of verify_area | |
37 | * - use get_user to access memory from userspace in set_threshold, | |
38 | * set_default_threshold and set_timeout | |
39 | * - don't use the panic function in serial167_init | |
40 | * - do resource release on failure on serial167_init | |
41 | * - include missing restore_flags in mvme167_serial_console_setup | |
42 | * | |
43 | * Kars de Jong <jongk@linux-m68k.org> - 2004/09/06 | |
44 | * - replace bottom half handler with task queue handler | |
45 | */ | |
46 | ||
1da177e4 LT |
47 | #include <linux/errno.h> |
48 | #include <linux/signal.h> | |
49 | #include <linux/sched.h> | |
50 | #include <linux/timer.h> | |
51 | #include <linux/tty.h> | |
52 | #include <linux/interrupt.h> | |
53 | #include <linux/serial.h> | |
54 | #include <linux/serialP.h> | |
405f5571 | 55 | #include <linux/smp_lock.h> |
1da177e4 LT |
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> | |
81e859ac | 66 | #include <linux/tty_flip.h> |
5a0e3ad6 | 67 | #include <linux/gfp.h> |
1da177e4 LT |
68 | |
69 | #include <asm/system.h> | |
70 | #include <asm/io.h> | |
71 | #include <asm/mvme16xhw.h> | |
72 | #include <asm/bootinfo.h> | |
73 | #include <asm/setup.h> | |
74 | ||
75 | #include <linux/types.h> | |
76 | #include <linux/kernel.h> | |
77 | ||
78 | #include <asm/uaccess.h> | |
79 | #include <linux/init.h> | |
80 | ||
81 | #define SERIAL_PARANOIA_CHECK | |
82 | #undef SERIAL_DEBUG_OPEN | |
83 | #undef SERIAL_DEBUG_THROTTLE | |
84 | #undef SERIAL_DEBUG_OTHER | |
85 | #undef SERIAL_DEBUG_IO | |
86 | #undef SERIAL_DEBUG_COUNT | |
87 | #undef SERIAL_DEBUG_DTR | |
88 | #undef CYCLOM_16Y_HACK | |
89 | #define CYCLOM_ENABLE_MONITORING | |
90 | ||
91 | #define WAKEUP_CHARS 256 | |
92 | ||
93 | #define STD_COM_FLAGS (0) | |
94 | ||
1da177e4 LT |
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[] = { | |
44bafdf3 JS |
114 | /* CARD# */ |
115 | {-1}, /* ttyS0 */ | |
116 | {-1}, /* ttyS1 */ | |
117 | {-1}, /* ttyS2 */ | |
118 | {-1}, /* ttyS3 */ | |
1da177e4 | 119 | }; |
44bafdf3 | 120 | |
fe971071 | 121 | #define NR_PORTS ARRAY_SIZE(cy_port) |
1da177e4 | 122 | |
1da177e4 LT |
123 | /* |
124 | * This is used to look up the divisor speeds and the timeouts | |
125 | * We're normally limited to 15 distinct baud rates. The extra | |
126 | * are accessed via settings in info->flags. | |
127 | * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, | |
128 | * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, | |
129 | * HI VHI | |
130 | */ | |
131 | static int baud_table[] = { | |
44bafdf3 JS |
132 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, |
133 | 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, | |
134 | 0 | |
135 | }; | |
1da177e4 LT |
136 | |
137 | #if 0 | |
44bafdf3 JS |
138 | static char baud_co[] = { /* 25 MHz clock option table */ |
139 | /* value => 00 01 02 03 04 */ | |
140 | /* divide by 8 32 128 512 2048 */ | |
141 | 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, | |
142 | 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | |
143 | }; | |
1da177e4 | 144 | |
44bafdf3 JS |
145 | static char baud_bpr[] = { /* 25 MHz baud rate period table */ |
146 | 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, | |
147 | 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15 | |
148 | }; | |
1da177e4 LT |
149 | #endif |
150 | ||
151 | /* I think 166 brd clocks 2401 at 20MHz.... */ | |
152 | ||
153 | /* These values are written directly to tcor, and >> 5 for writing to rcor */ | |
44bafdf3 JS |
154 | static u_char baud_co[] = { /* 20 MHz clock option table */ |
155 | 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40, | |
156 | 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | |
157 | }; | |
1da177e4 LT |
158 | |
159 | /* These values written directly to tbpr/rbpr */ | |
44bafdf3 JS |
160 | static u_char baud_bpr[] = { /* 20 MHz baud rate period table */ |
161 | 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81, | |
162 | 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10 | |
163 | }; | |
1da177e4 | 164 | |
44bafdf3 JS |
165 | static u_char baud_cor4[] = { /* receive threshold */ |
166 | 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, | |
167 | 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07 | |
168 | }; | |
1da177e4 LT |
169 | |
170 | static void shutdown(struct cyclades_port *); | |
44bafdf3 | 171 | static int startup(struct cyclades_port *); |
1da177e4 LT |
172 | static void cy_throttle(struct tty_struct *); |
173 | static void cy_unthrottle(struct tty_struct *); | |
174 | static void config_setup(struct cyclades_port *); | |
1da177e4 LT |
175 | #ifdef CYCLOM_SHOW_STATUS |
176 | static void show_status(int); | |
177 | #endif | |
178 | ||
1da177e4 LT |
179 | /* |
180 | * I have my own version of udelay(), as it is needed when initialising | |
181 | * the chip, before the delay loop has been calibrated. Should probably | |
182 | * reference one of the vmechip2 or pccchip2 counter for an accurate | |
183 | * delay, but this wild guess will do for now. | |
184 | */ | |
185 | ||
44bafdf3 | 186 | void my_udelay(long us) |
1da177e4 LT |
187 | { |
188 | u_char x; | |
189 | volatile u_char *p = &x; | |
190 | int i; | |
191 | ||
192 | while (us--) | |
193 | for (i = 100; i; i--) | |
194 | x |= *p; | |
195 | } | |
196 | ||
44bafdf3 JS |
197 | static inline int serial_paranoia_check(struct cyclades_port *info, char *name, |
198 | const char *routine) | |
1da177e4 LT |
199 | { |
200 | #ifdef SERIAL_PARANOIA_CHECK | |
44bafdf3 JS |
201 | if (!info) { |
202 | printk("Warning: null cyclades_port for (%s) in %s\n", name, | |
203 | routine); | |
204 | return 1; | |
205 | } | |
206 | ||
f23fc156 | 207 | if (info < &cy_port[0] || info >= &cy_port[NR_PORTS]) { |
44bafdf3 JS |
208 | printk("Warning: cyclades_port out of range for (%s) in %s\n", |
209 | name, routine); | |
210 | return 1; | |
211 | } | |
212 | ||
213 | if (info->magic != CYCLADES_MAGIC) { | |
214 | printk("Warning: bad magic number for serial struct (%s) in " | |
215 | "%s\n", name, routine); | |
216 | return 1; | |
217 | } | |
1da177e4 LT |
218 | #endif |
219 | return 0; | |
44bafdf3 | 220 | } /* serial_paranoia_check */ |
1da177e4 LT |
221 | |
222 | #if 0 | |
223 | /* The following diagnostic routines allow the driver to spew | |
224 | information on the screen, even (especially!) during interrupts. | |
225 | */ | |
44bafdf3 JS |
226 | void SP(char *data) |
227 | { | |
228 | unsigned long flags; | |
229 | local_irq_save(flags); | |
353f6dd2 | 230 | printk(KERN_EMERG "%s", data); |
44bafdf3 | 231 | local_irq_restore(flags); |
1da177e4 | 232 | } |
44bafdf3 | 233 | |
1da177e4 | 234 | char scrn[2]; |
44bafdf3 JS |
235 | void CP(char data) |
236 | { | |
237 | unsigned long flags; | |
238 | local_irq_save(flags); | |
239 | scrn[0] = data; | |
353f6dd2 | 240 | printk(KERN_EMERG "%c", scrn); |
44bafdf3 JS |
241 | local_irq_restore(flags); |
242 | } /* CP */ | |
1da177e4 | 243 | |
44bafdf3 JS |
244 | void CP1(int data) |
245 | { | |
246 | (data < 10) ? CP(data + '0') : CP(data + 'A' - 10); | |
247 | } /* CP1 */ | |
248 | void CP2(int data) | |
249 | { | |
250 | CP1((data >> 4) & 0x0f); | |
251 | CP1(data & 0x0f); | |
252 | } /* CP2 */ | |
253 | void CP4(int data) | |
254 | { | |
255 | CP2((data >> 8) & 0xff); | |
256 | CP2(data & 0xff); | |
257 | } /* CP4 */ | |
258 | void CP8(long data) | |
259 | { | |
260 | CP4((data >> 16) & 0xffff); | |
261 | CP4(data & 0xffff); | |
262 | } /* CP8 */ | |
1da177e4 LT |
263 | #endif |
264 | ||
265 | /* This routine waits up to 1000 micro-seconds for the previous | |
266 | command to the Cirrus chip to complete and then issues the | |
267 | new command. An error is returned if the previous command | |
268 | didn't finish within the time limit. | |
269 | */ | |
44bafdf3 | 270 | u_short write_cy_cmd(volatile u_char * base_addr, u_char cmd) |
1da177e4 | 271 | { |
44bafdf3 JS |
272 | unsigned long flags; |
273 | volatile int i; | |
1da177e4 | 274 | |
44bafdf3 | 275 | local_irq_save(flags); |
1da177e4 | 276 | /* Check to see that the previous command has completed */ |
44bafdf3 JS |
277 | for (i = 0; i < 100; i++) { |
278 | if (base_addr[CyCCR] == 0) { | |
279 | break; | |
280 | } | |
281 | my_udelay(10L); | |
1da177e4 LT |
282 | } |
283 | /* if the CCR never cleared, the previous command | |
44bafdf3 JS |
284 | didn't finish within the "reasonable time" */ |
285 | if (i == 10) { | |
286 | local_irq_restore(flags); | |
287 | return (-1); | |
1da177e4 LT |
288 | } |
289 | ||
290 | /* Issue the new command */ | |
291 | base_addr[CyCCR] = cmd; | |
44bafdf3 JS |
292 | local_irq_restore(flags); |
293 | return (0); | |
294 | } /* write_cy_cmd */ | |
1da177e4 LT |
295 | |
296 | /* cy_start and cy_stop provide software output flow control as a | |
297 | function of XON/XOFF, software CTS, and other such stuff. */ | |
298 | ||
44bafdf3 | 299 | static void cy_stop(struct tty_struct *tty) |
1da177e4 | 300 | { |
c9f19e96 | 301 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
302 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
303 | int channel; | |
304 | unsigned long flags; | |
1da177e4 LT |
305 | |
306 | #ifdef SERIAL_DEBUG_OTHER | |
44bafdf3 | 307 | printk("cy_stop %s\n", tty->name); /* */ |
1da177e4 LT |
308 | #endif |
309 | ||
44bafdf3 JS |
310 | if (serial_paranoia_check(info, tty->name, "cy_stop")) |
311 | return; | |
1da177e4 | 312 | |
44bafdf3 | 313 | channel = info->line; |
1da177e4 | 314 | |
44bafdf3 JS |
315 | local_irq_save(flags); |
316 | base_addr[CyCAR] = (u_char) (channel); /* index channel */ | |
317 | base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy); | |
318 | local_irq_restore(flags); | |
319 | } /* cy_stop */ | |
1da177e4 | 320 | |
44bafdf3 | 321 | static void cy_start(struct tty_struct *tty) |
1da177e4 | 322 | { |
c9f19e96 | 323 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
324 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; |
325 | int channel; | |
326 | unsigned long flags; | |
1da177e4 LT |
327 | |
328 | #ifdef SERIAL_DEBUG_OTHER | |
44bafdf3 | 329 | printk("cy_start %s\n", tty->name); /* */ |
1da177e4 LT |
330 | #endif |
331 | ||
44bafdf3 JS |
332 | if (serial_paranoia_check(info, tty->name, "cy_start")) |
333 | return; | |
1da177e4 | 334 | |
44bafdf3 | 335 | channel = info->line; |
1da177e4 | 336 | |
44bafdf3 JS |
337 | local_irq_save(flags); |
338 | base_addr[CyCAR] = (u_char) (channel); | |
339 | base_addr[CyIER] |= CyTxMpty; | |
340 | local_irq_restore(flags); | |
341 | } /* cy_start */ | |
1da177e4 | 342 | |
1da177e4 LT |
343 | /* The real interrupt service routines are called |
344 | whenever the card wants its hand held--chars | |
345 | received, out buffer empty, modem change, etc. | |
346 | */ | |
44bafdf3 | 347 | static irqreturn_t cd2401_rxerr_interrupt(int irq, void *dev_id) |
1da177e4 | 348 | { |
44bafdf3 JS |
349 | struct tty_struct *tty; |
350 | struct cyclades_port *info; | |
351 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
352 | unsigned char err, rfoc; | |
353 | int channel; | |
354 | char data; | |
355 | ||
356 | /* determine the channel and change to that context */ | |
357 | channel = (u_short) (base_addr[CyLICR] >> 2); | |
358 | info = &cy_port[channel]; | |
359 | info->last_active = jiffies; | |
360 | ||
361 | if ((err = base_addr[CyRISR]) & CyTIMEOUT) { | |
362 | /* This is a receive timeout interrupt, ignore it */ | |
363 | base_addr[CyREOIR] = CyNOTRANS; | |
364 | return IRQ_HANDLED; | |
365 | } | |
1da177e4 | 366 | |
44bafdf3 JS |
367 | /* Read a byte of data if there is any - assume the error |
368 | * is associated with this character */ | |
1da177e4 | 369 | |
44bafdf3 JS |
370 | if ((rfoc = base_addr[CyRFOC]) != 0) |
371 | data = base_addr[CyRDR]; | |
372 | else | |
373 | data = 0; | |
374 | ||
375 | /* if there is nowhere to put the data, discard it */ | |
376 | if (info->tty == 0) { | |
377 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
378 | return IRQ_HANDLED; | |
379 | } else { /* there is an open port for this data */ | |
380 | tty = info->tty; | |
381 | if (err & info->ignore_status_mask) { | |
382 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; | |
383 | return IRQ_HANDLED; | |
384 | } | |
385 | if (tty_buffer_request_room(tty, 1) != 0) { | |
386 | if (err & info->read_status_mask) { | |
387 | if (err & CyBREAK) { | |
388 | tty_insert_flip_char(tty, data, | |
389 | TTY_BREAK); | |
390 | if (info->flags & ASYNC_SAK) { | |
391 | do_SAK(tty); | |
392 | } | |
393 | } else if (err & CyFRAME) { | |
394 | tty_insert_flip_char(tty, data, | |
395 | TTY_FRAME); | |
396 | } else if (err & CyPARITY) { | |
397 | tty_insert_flip_char(tty, data, | |
398 | TTY_PARITY); | |
399 | } else if (err & CyOVERRUN) { | |
400 | tty_insert_flip_char(tty, 0, | |
401 | TTY_OVERRUN); | |
402 | /* | |
403 | If the flip buffer itself is | |
c4f01240 | 404 | overflowing, we still lose |
44bafdf3 JS |
405 | the next incoming character. |
406 | */ | |
407 | if (tty_buffer_request_room(tty, 1) != | |
408 | 0) { | |
409 | tty_insert_flip_char(tty, data, | |
410 | TTY_FRAME); | |
411 | } | |
412 | /* These two conditions may imply */ | |
413 | /* a normal read should be done. */ | |
414 | /* else if(data & CyTIMEOUT) */ | |
415 | /* else if(data & CySPECHAR) */ | |
416 | } else { | |
417 | tty_insert_flip_char(tty, 0, | |
418 | TTY_NORMAL); | |
419 | } | |
420 | } else { | |
421 | tty_insert_flip_char(tty, data, TTY_NORMAL); | |
422 | } | |
423 | } else { | |
424 | /* there was a software buffer overrun | |
425 | and nothing could be done about it!!! */ | |
426 | } | |
427 | } | |
428 | tty_schedule_flip(tty); | |
429 | /* end of service */ | |
1da177e4 LT |
430 | base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS; |
431 | return IRQ_HANDLED; | |
44bafdf3 JS |
432 | } /* cy_rxerr_interrupt */ |
433 | ||
434 | static irqreturn_t cd2401_modem_interrupt(int irq, void *dev_id) | |
1da177e4 | 435 | { |
44bafdf3 JS |
436 | struct cyclades_port *info; |
437 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
438 | int channel; | |
439 | int mdm_change; | |
440 | int mdm_status; | |
441 | ||
442 | /* determine the channel and change to that context */ | |
443 | channel = (u_short) (base_addr[CyLICR] >> 2); | |
444 | info = &cy_port[channel]; | |
445 | info->last_active = jiffies; | |
446 | ||
447 | mdm_change = base_addr[CyMISR]; | |
448 | mdm_status = base_addr[CyMSVR1]; | |
449 | ||
450 | if (info->tty == 0) { /* nowhere to put the data, ignore it */ | |
451 | ; | |
452 | } else { | |
453 | if ((mdm_change & CyDCD) | |
454 | && (info->flags & ASYNC_CHECK_CD)) { | |
455 | if (mdm_status & CyDCD) { | |
1da177e4 | 456 | /* CP('!'); */ |
3099bbc5 | 457 | wake_up_interruptible(&info->open_wait); |
44bafdf3 | 458 | } else { |
1da177e4 | 459 | /* CP('@'); */ |
3099bbc5 JS |
460 | tty_hangup(info->tty); |
461 | wake_up_interruptible(&info->open_wait); | |
462 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
44bafdf3 | 463 | } |
1da177e4 | 464 | } |
44bafdf3 JS |
465 | if ((mdm_change & CyCTS) |
466 | && (info->flags & ASYNC_CTS_FLOW)) { | |
467 | if (info->tty->stopped) { | |
468 | if (mdm_status & CyCTS) { | |
469 | /* !!! cy_start isn't used because... */ | |
470 | info->tty->stopped = 0; | |
471 | base_addr[CyIER] |= CyTxMpty; | |
3099bbc5 | 472 | tty_wakeup(info->tty); |
44bafdf3 JS |
473 | } |
474 | } else { | |
475 | if (!(mdm_status & CyCTS)) { | |
476 | /* !!! cy_stop isn't used because... */ | |
477 | info->tty->stopped = 1; | |
478 | base_addr[CyIER] &= | |
479 | ~(CyTxMpty | CyTxRdy); | |
480 | } | |
481 | } | |
482 | } | |
483 | if (mdm_status & CyDSR) { | |
1da177e4 | 484 | } |
1da177e4 | 485 | } |
44bafdf3 JS |
486 | base_addr[CyMEOIR] = 0; |
487 | return IRQ_HANDLED; | |
488 | } /* cy_modem_interrupt */ | |
1da177e4 | 489 | |
44bafdf3 | 490 | static irqreturn_t cd2401_tx_interrupt(int irq, void *dev_id) |
1da177e4 | 491 | { |
44bafdf3 JS |
492 | struct cyclades_port *info; |
493 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
494 | int channel; | |
495 | int char_count, saved_cnt; | |
496 | int outch; | |
1da177e4 | 497 | |
44bafdf3 JS |
498 | /* determine the channel and change to that context */ |
499 | channel = (u_short) (base_addr[CyLICR] >> 2); | |
1da177e4 | 500 | |
44bafdf3 JS |
501 | /* validate the port number (as configured and open) */ |
502 | if ((channel < 0) || (NR_PORTS <= channel)) { | |
503 | base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy); | |
504 | base_addr[CyTEOIR] = CyNOTRANS; | |
505 | return IRQ_HANDLED; | |
506 | } | |
f23fc156 | 507 | info = &cy_port[channel]; |
44bafdf3 JS |
508 | info->last_active = jiffies; |
509 | if (info->tty == 0) { | |
510 | base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy); | |
44bafdf3 JS |
511 | base_addr[CyTEOIR] = CyNOTRANS; |
512 | return IRQ_HANDLED; | |
513 | } | |
514 | ||
515 | /* load the on-chip space available for outbound data */ | |
516 | saved_cnt = char_count = base_addr[CyTFTC]; | |
517 | ||
518 | if (info->x_char) { /* send special char */ | |
519 | outch = info->x_char; | |
1da177e4 | 520 | base_addr[CyTDR] = outch; |
1da177e4 | 521 | char_count--; |
44bafdf3 | 522 | info->x_char = 0; |
1da177e4 | 523 | } |
1da177e4 | 524 | |
44bafdf3 JS |
525 | if (info->x_break) { |
526 | /* The Cirrus chip requires the "Embedded Transmit | |
527 | Commands" of start break, delay, and end break | |
528 | sequences to be sent. The duration of the | |
529 | break is given in TICs, which runs at HZ | |
530 | (typically 100) and the PPR runs at 200 Hz, | |
531 | so the delay is duration * 200/HZ, and thus a | |
532 | break can run from 1/100 sec to about 5/4 sec. | |
533 | Need to check these values - RGH 141095. | |
534 | */ | |
535 | base_addr[CyTDR] = 0; /* start break */ | |
536 | base_addr[CyTDR] = 0x81; | |
537 | base_addr[CyTDR] = 0; /* delay a bit */ | |
538 | base_addr[CyTDR] = 0x82; | |
539 | base_addr[CyTDR] = info->x_break * 200 / HZ; | |
540 | base_addr[CyTDR] = 0; /* terminate break */ | |
541 | base_addr[CyTDR] = 0x83; | |
542 | char_count -= 7; | |
543 | info->x_break = 0; | |
544 | } | |
545 | ||
546 | while (char_count > 0) { | |
547 | if (!info->xmit_cnt) { | |
548 | base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy); | |
549 | break; | |
550 | } | |
551 | if (info->xmit_buf == 0) { | |
552 | base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy); | |
553 | break; | |
554 | } | |
555 | if (info->tty->stopped || info->tty->hw_stopped) { | |
556 | base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy); | |
557 | break; | |
558 | } | |
559 | /* Because the Embedded Transmit Commands have been | |
560 | enabled, we must check to see if the escape | |
561 | character, NULL, is being sent. If it is, we | |
562 | must ensure that there is room for it to be | |
563 | doubled in the output stream. Therefore we | |
564 | no longer advance the pointer when the character | |
565 | is fetched, but rather wait until after the check | |
566 | for a NULL output character. (This is necessary | |
567 | because there may not be room for the two chars | |
568 | needed to send a NULL. | |
569 | */ | |
570 | outch = info->xmit_buf[info->xmit_tail]; | |
571 | if (outch) { | |
572 | info->xmit_cnt--; | |
573 | info->xmit_tail = (info->xmit_tail + 1) | |
574 | & (PAGE_SIZE - 1); | |
575 | base_addr[CyTDR] = outch; | |
576 | char_count--; | |
577 | } else { | |
578 | if (char_count > 1) { | |
579 | info->xmit_cnt--; | |
580 | info->xmit_tail = (info->xmit_tail + 1) | |
581 | & (PAGE_SIZE - 1); | |
582 | base_addr[CyTDR] = outch; | |
583 | base_addr[CyTDR] = 0; | |
584 | char_count--; | |
585 | char_count--; | |
586 | } else { | |
587 | break; | |
588 | } | |
589 | } | |
590 | } | |
591 | ||
3099bbc5 JS |
592 | if (info->xmit_cnt < WAKEUP_CHARS) |
593 | tty_wakeup(info->tty); | |
594 | ||
44bafdf3 JS |
595 | base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS; |
596 | return IRQ_HANDLED; | |
597 | } /* cy_tx_interrupt */ | |
1da177e4 | 598 | |
44bafdf3 | 599 | static irqreturn_t cd2401_rx_interrupt(int irq, void *dev_id) |
1da177e4 | 600 | { |
44bafdf3 JS |
601 | struct tty_struct *tty; |
602 | struct cyclades_port *info; | |
603 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
604 | int channel; | |
605 | char data; | |
606 | int char_count; | |
607 | int save_cnt; | |
44bafdf3 JS |
608 | |
609 | /* determine the channel and change to that context */ | |
610 | channel = (u_short) (base_addr[CyLICR] >> 2); | |
611 | info = &cy_port[channel]; | |
612 | info->last_active = jiffies; | |
613 | save_cnt = char_count = base_addr[CyRFOC]; | |
1da177e4 | 614 | |
44bafdf3 JS |
615 | /* if there is nowhere to put the data, discard it */ |
616 | if (info->tty == 0) { | |
617 | while (char_count--) { | |
618 | data = base_addr[CyRDR]; | |
619 | } | |
620 | } else { /* there is an open port for this data */ | |
621 | tty = info->tty; | |
622 | /* load # characters available from the chip */ | |
1da177e4 LT |
623 | |
624 | #ifdef CYCLOM_ENABLE_MONITORING | |
44bafdf3 JS |
625 | ++info->mon.int_count; |
626 | info->mon.char_count += char_count; | |
627 | if (char_count > info->mon.char_max) | |
628 | info->mon.char_max = char_count; | |
629 | info->mon.char_last = char_count; | |
630 | #endif | |
4165fe4e | 631 | while (char_count--) { |
44bafdf3 JS |
632 | data = base_addr[CyRDR]; |
633 | tty_insert_flip_char(tty, data, TTY_NORMAL); | |
1da177e4 | 634 | #ifdef CYCLOM_16Y_HACK |
44bafdf3 | 635 | udelay(10L); |
1da177e4 | 636 | #endif |
44bafdf3 JS |
637 | } |
638 | tty_schedule_flip(tty); | |
639 | } | |
640 | /* end of service */ | |
641 | base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS; | |
642 | return IRQ_HANDLED; | |
643 | } /* cy_rx_interrupt */ | |
1da177e4 | 644 | |
1da177e4 LT |
645 | /* This is called whenever a port becomes active; |
646 | interrupts are enabled and DTR & RTS are turned on. | |
647 | */ | |
44bafdf3 | 648 | static int startup(struct cyclades_port *info) |
1da177e4 | 649 | { |
44bafdf3 JS |
650 | unsigned long flags; |
651 | volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR; | |
652 | int channel; | |
1da177e4 | 653 | |
44bafdf3 JS |
654 | if (info->flags & ASYNC_INITIALIZED) { |
655 | return 0; | |
656 | } | |
1da177e4 | 657 | |
44bafdf3 JS |
658 | if (!info->type) { |
659 | if (info->tty) { | |
660 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
661 | } | |
662 | return 0; | |
1da177e4 | 663 | } |
44bafdf3 JS |
664 | if (!info->xmit_buf) { |
665 | info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); | |
666 | if (!info->xmit_buf) { | |
667 | return -ENOMEM; | |
668 | } | |
1da177e4 | 669 | } |
1da177e4 | 670 | |
44bafdf3 | 671 | config_setup(info); |
1da177e4 | 672 | |
44bafdf3 | 673 | channel = info->line; |
1da177e4 LT |
674 | |
675 | #ifdef SERIAL_DEBUG_OPEN | |
44bafdf3 | 676 | printk("startup channel %d\n", channel); |
1da177e4 LT |
677 | #endif |
678 | ||
44bafdf3 JS |
679 | local_irq_save(flags); |
680 | base_addr[CyCAR] = (u_char) channel; | |
681 | write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR); | |
1da177e4 | 682 | |
44bafdf3 | 683 | base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */ |
1da177e4 LT |
684 | base_addr[CyMSVR1] = CyRTS; |
685 | /* CP('S');CP('1'); */ | |
686 | base_addr[CyMSVR2] = CyDTR; | |
687 | ||
688 | #ifdef SERIAL_DEBUG_DTR | |
44bafdf3 JS |
689 | printk("cyc: %d: raising DTR\n", __LINE__); |
690 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], | |
691 | base_addr[CyMSVR2]); | |
1da177e4 LT |
692 | #endif |
693 | ||
694 | base_addr[CyIER] |= CyRxData; | |
695 | info->flags |= ASYNC_INITIALIZED; | |
696 | ||
44bafdf3 JS |
697 | if (info->tty) { |
698 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
1da177e4 LT |
699 | } |
700 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
701 | ||
44bafdf3 | 702 | local_irq_restore(flags); |
1da177e4 LT |
703 | |
704 | #ifdef SERIAL_DEBUG_OPEN | |
44bafdf3 | 705 | printk(" done\n"); |
1da177e4 | 706 | #endif |
44bafdf3 JS |
707 | return 0; |
708 | } /* startup */ | |
1da177e4 | 709 | |
44bafdf3 | 710 | void start_xmit(struct cyclades_port *info) |
1da177e4 | 711 | { |
44bafdf3 JS |
712 | unsigned long flags; |
713 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
714 | int channel; | |
1da177e4 | 715 | |
44bafdf3 JS |
716 | channel = info->line; |
717 | local_irq_save(flags); | |
1da177e4 LT |
718 | base_addr[CyCAR] = channel; |
719 | base_addr[CyIER] |= CyTxMpty; | |
44bafdf3 JS |
720 | local_irq_restore(flags); |
721 | } /* start_xmit */ | |
1da177e4 LT |
722 | |
723 | /* | |
724 | * This routine shuts down a serial port; interrupts are disabled, | |
725 | * and DTR is dropped if the hangup on close termio flag is on. | |
726 | */ | |
44bafdf3 | 727 | static void shutdown(struct cyclades_port *info) |
1da177e4 | 728 | { |
44bafdf3 JS |
729 | unsigned long flags; |
730 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
731 | int channel; | |
1da177e4 | 732 | |
44bafdf3 | 733 | if (!(info->flags & ASYNC_INITIALIZED)) { |
1da177e4 | 734 | /* CP('$'); */ |
44bafdf3 JS |
735 | return; |
736 | } | |
1da177e4 | 737 | |
44bafdf3 | 738 | channel = info->line; |
1da177e4 LT |
739 | |
740 | #ifdef SERIAL_DEBUG_OPEN | |
44bafdf3 | 741 | printk("shutdown channel %d\n", channel); |
1da177e4 LT |
742 | #endif |
743 | ||
44bafdf3 JS |
744 | /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE |
745 | SENT BEFORE DROPPING THE LINE !!! (Perhaps | |
746 | set some flag that is read when XMTY happens.) | |
747 | Other choices are to delay some fixed interval | |
748 | or schedule some later processing. | |
749 | */ | |
750 | local_irq_save(flags); | |
751 | if (info->xmit_buf) { | |
752 | free_page((unsigned long)info->xmit_buf); | |
753 | info->xmit_buf = NULL; | |
1da177e4 LT |
754 | } |
755 | ||
44bafdf3 | 756 | base_addr[CyCAR] = (u_char) channel; |
1da177e4 | 757 | if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { |
44bafdf3 | 758 | base_addr[CyMSVR1] = 0; |
1da177e4 | 759 | /* CP('C');CP('1'); */ |
44bafdf3 | 760 | base_addr[CyMSVR2] = 0; |
1da177e4 | 761 | #ifdef SERIAL_DEBUG_DTR |
44bafdf3 JS |
762 | printk("cyc: %d: dropping DTR\n", __LINE__); |
763 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], | |
764 | base_addr[CyMSVR2]); | |
1da177e4 | 765 | #endif |
44bafdf3 JS |
766 | } |
767 | write_cy_cmd(base_addr, CyDIS_RCVR); | |
768 | /* it may be appropriate to clear _XMIT at | |
769 | some later date (after testing)!!! */ | |
1da177e4 | 770 | |
44bafdf3 JS |
771 | if (info->tty) { |
772 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
1da177e4 LT |
773 | } |
774 | info->flags &= ~ASYNC_INITIALIZED; | |
44bafdf3 | 775 | local_irq_restore(flags); |
1da177e4 LT |
776 | |
777 | #ifdef SERIAL_DEBUG_OPEN | |
44bafdf3 | 778 | printk(" done\n"); |
1da177e4 | 779 | #endif |
44bafdf3 | 780 | } /* shutdown */ |
1da177e4 LT |
781 | |
782 | /* | |
783 | * This routine finds or computes the various line characteristics. | |
784 | */ | |
44bafdf3 | 785 | static void config_setup(struct cyclades_port *info) |
1da177e4 | 786 | { |
44bafdf3 JS |
787 | unsigned long flags; |
788 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
789 | int channel; | |
790 | unsigned cflag; | |
791 | int i; | |
792 | unsigned char ti, need_init_chan = 0; | |
793 | ||
794 | if (!info->tty || !info->tty->termios) { | |
795 | return; | |
796 | } | |
797 | if (info->line == -1) { | |
798 | return; | |
799 | } | |
800 | cflag = info->tty->termios->c_cflag; | |
801 | ||
802 | /* baud rate */ | |
803 | i = cflag & CBAUD; | |
1da177e4 LT |
804 | #ifdef CBAUDEX |
805 | /* Starting with kernel 1.1.65, there is direct support for | |
806 | higher baud rates. The following code supports those | |
807 | changes. The conditional aspect allows this driver to be | |
808 | used for earlier as well as later kernel versions. (The | |
809 | mapping is slightly different from serial.c because there | |
810 | is still the possibility of supporting 75 kbit/sec with | |
811 | the Cyclades board.) | |
812 | */ | |
44bafdf3 JS |
813 | if (i & CBAUDEX) { |
814 | if (i == B57600) | |
815 | i = 16; | |
816 | else if (i == B115200) | |
817 | i = 18; | |
1da177e4 | 818 | #ifdef B78600 |
44bafdf3 JS |
819 | else if (i == B78600) |
820 | i = 17; | |
1da177e4 | 821 | #endif |
44bafdf3 JS |
822 | else |
823 | info->tty->termios->c_cflag &= ~CBAUDEX; | |
824 | } | |
825 | #endif | |
826 | if (i == 15) { | |
827 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
828 | i += 1; | |
829 | if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
830 | i += 3; | |
831 | } | |
832 | /* Don't ever change the speed of the console port. It will | |
833 | * run at the speed specified in bootinfo, or at 19.2K */ | |
834 | /* Actually, it should run at whatever speed 166Bug was using */ | |
835 | /* Note info->timeout isn't used at present */ | |
836 | if (info != serial_console_info) { | |
837 | info->tbpr = baud_bpr[i]; /* Tx BPR */ | |
838 | info->tco = baud_co[i]; /* Tx CO */ | |
839 | info->rbpr = baud_bpr[i]; /* Rx BPR */ | |
840 | info->rco = baud_co[i] >> 5; /* Rx CO */ | |
841 | if (baud_table[i] == 134) { | |
842 | info->timeout = | |
843 | (info->xmit_fifo_size * HZ * 30 / 269) + 2; | |
844 | /* get it right for 134.5 baud */ | |
845 | } else if (baud_table[i]) { | |
846 | info->timeout = | |
847 | (info->xmit_fifo_size * HZ * 15 / baud_table[i]) + | |
848 | 2; | |
849 | /* this needs to be propagated into the card info */ | |
850 | } else { | |
851 | info->timeout = 0; | |
852 | } | |
853 | } | |
854 | /* By tradition (is it a standard?) a baud rate of zero | |
855 | implies the line should be/has been closed. A bit | |
856 | later in this routine such a test is performed. */ | |
857 | ||
858 | /* byte size and parity */ | |
859 | info->cor7 = 0; | |
860 | info->cor6 = 0; | |
861 | info->cor5 = 0; | |
862 | info->cor4 = (info->default_threshold ? info->default_threshold : baud_cor4[i]); /* receive threshold */ | |
863 | /* Following two lines added 101295, RGH. */ | |
864 | /* It is obviously wrong to access CyCORx, and not info->corx here, | |
865 | * try and remember to fix it later! */ | |
866 | channel = info->line; | |
867 | base_addr[CyCAR] = (u_char) channel; | |
868 | if (C_CLOCAL(info->tty)) { | |
869 | if (base_addr[CyIER] & CyMdmCh) | |
870 | base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */ | |
871 | /* ignore 1->0 modem transitions */ | |
872 | if (base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD)) | |
873 | base_addr[CyCOR4] &= ~(CyDSR | CyCTS | CyDCD); | |
874 | /* ignore 0->1 modem transitions */ | |
875 | if (base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD)) | |
876 | base_addr[CyCOR5] &= ~(CyDSR | CyCTS | CyDCD); | |
1da177e4 | 877 | } else { |
44bafdf3 JS |
878 | if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh) |
879 | base_addr[CyIER] |= CyMdmCh; /* with modem intr */ | |
880 | /* act on 1->0 modem transitions */ | |
881 | if ((base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD)) != | |
882 | (CyDSR | CyCTS | CyDCD)) | |
883 | base_addr[CyCOR4] |= CyDSR | CyCTS | CyDCD; | |
884 | /* act on 0->1 modem transitions */ | |
885 | if ((base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD)) != | |
886 | (CyDSR | CyCTS | CyDCD)) | |
887 | base_addr[CyCOR5] |= CyDSR | CyCTS | CyDCD; | |
888 | } | |
889 | info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP; | |
890 | info->cor2 = CyETC; | |
891 | switch (cflag & CSIZE) { | |
892 | case CS5: | |
893 | info->cor1 = Cy_5_BITS; | |
894 | break; | |
895 | case CS6: | |
896 | info->cor1 = Cy_6_BITS; | |
897 | break; | |
898 | case CS7: | |
899 | info->cor1 = Cy_7_BITS; | |
900 | break; | |
901 | case CS8: | |
902 | info->cor1 = Cy_8_BITS; | |
903 | break; | |
904 | } | |
905 | if (cflag & PARENB) { | |
906 | if (cflag & PARODD) { | |
907 | info->cor1 |= CyPARITY_O; | |
908 | } else { | |
909 | info->cor1 |= CyPARITY_E; | |
910 | } | |
911 | } else { | |
912 | info->cor1 |= CyPARITY_NONE; | |
913 | } | |
914 | ||
915 | /* CTS flow control flag */ | |
1da177e4 | 916 | #if 0 |
44bafdf3 JS |
917 | /* Don't complcate matters for now! RGH 141095 */ |
918 | if (cflag & CRTSCTS) { | |
919 | info->flags |= ASYNC_CTS_FLOW; | |
920 | info->cor2 |= CyCtsAE; | |
921 | } else { | |
922 | info->flags &= ~ASYNC_CTS_FLOW; | |
923 | info->cor2 &= ~CyCtsAE; | |
924 | } | |
925 | #endif | |
926 | if (cflag & CLOCAL) | |
927 | info->flags &= ~ASYNC_CHECK_CD; | |
928 | else | |
929 | info->flags |= ASYNC_CHECK_CD; | |
1da177e4 LT |
930 | |
931 | /*********************************************** | |
932 | The hardware option, CyRtsAO, presents RTS when | |
933 | the chip has characters to send. Since most modems | |
934 | use RTS as reverse (inbound) flow control, this | |
935 | option is not used. If inbound flow control is | |
936 | necessary, DTR can be programmed to provide the | |
937 | appropriate signals for use with a non-standard | |
938 | cable. Contact Marcio Saito for details. | |
939 | ***********************************************/ | |
940 | ||
44bafdf3 | 941 | channel = info->line; |
1da177e4 | 942 | |
44bafdf3 JS |
943 | local_irq_save(flags); |
944 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 LT |
945 | |
946 | /* CyCMR set once only in mvme167_init_serial() */ | |
947 | if (base_addr[CyLICR] != channel << 2) | |
44bafdf3 | 948 | base_addr[CyLICR] = channel << 2; |
1da177e4 | 949 | if (base_addr[CyLIVR] != 0x5c) |
44bafdf3 | 950 | base_addr[CyLIVR] = 0x5c; |
1da177e4 | 951 | |
44bafdf3 | 952 | /* tx and rx baud rate */ |
1da177e4 LT |
953 | |
954 | if (base_addr[CyCOR1] != info->cor1) | |
44bafdf3 | 955 | need_init_chan = 1; |
1da177e4 | 956 | if (base_addr[CyTCOR] != info->tco) |
44bafdf3 | 957 | base_addr[CyTCOR] = info->tco; |
1da177e4 | 958 | if (base_addr[CyTBPR] != info->tbpr) |
44bafdf3 | 959 | base_addr[CyTBPR] = info->tbpr; |
1da177e4 | 960 | if (base_addr[CyRCOR] != info->rco) |
44bafdf3 | 961 | base_addr[CyRCOR] = info->rco; |
1da177e4 | 962 | if (base_addr[CyRBPR] != info->rbpr) |
44bafdf3 | 963 | base_addr[CyRBPR] = info->rbpr; |
1da177e4 LT |
964 | |
965 | /* set line characteristics according configuration */ | |
966 | ||
967 | if (base_addr[CySCHR1] != START_CHAR(info->tty)) | |
44bafdf3 | 968 | base_addr[CySCHR1] = START_CHAR(info->tty); |
1da177e4 | 969 | if (base_addr[CySCHR2] != STOP_CHAR(info->tty)) |
44bafdf3 | 970 | base_addr[CySCHR2] = STOP_CHAR(info->tty); |
1da177e4 | 971 | if (base_addr[CySCRL] != START_CHAR(info->tty)) |
44bafdf3 | 972 | base_addr[CySCRL] = START_CHAR(info->tty); |
1da177e4 | 973 | if (base_addr[CySCRH] != START_CHAR(info->tty)) |
44bafdf3 | 974 | base_addr[CySCRH] = START_CHAR(info->tty); |
1da177e4 | 975 | if (base_addr[CyCOR1] != info->cor1) |
44bafdf3 | 976 | base_addr[CyCOR1] = info->cor1; |
1da177e4 | 977 | if (base_addr[CyCOR2] != info->cor2) |
44bafdf3 | 978 | base_addr[CyCOR2] = info->cor2; |
1da177e4 | 979 | if (base_addr[CyCOR3] != info->cor3) |
44bafdf3 | 980 | base_addr[CyCOR3] = info->cor3; |
1da177e4 | 981 | if (base_addr[CyCOR4] != info->cor4) |
44bafdf3 | 982 | base_addr[CyCOR4] = info->cor4; |
1da177e4 | 983 | if (base_addr[CyCOR5] != info->cor5) |
44bafdf3 | 984 | base_addr[CyCOR5] = info->cor5; |
1da177e4 | 985 | if (base_addr[CyCOR6] != info->cor6) |
44bafdf3 | 986 | base_addr[CyCOR6] = info->cor6; |
1da177e4 | 987 | if (base_addr[CyCOR7] != info->cor7) |
44bafdf3 | 988 | base_addr[CyCOR7] = info->cor7; |
1da177e4 LT |
989 | |
990 | if (need_init_chan) | |
44bafdf3 | 991 | write_cy_cmd(base_addr, CyINIT_CHAN); |
1da177e4 | 992 | |
44bafdf3 | 993 | base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */ |
1da177e4 LT |
994 | |
995 | /* 2ms default rx timeout */ | |
996 | ti = info->default_timeout ? info->default_timeout : 0x02; | |
997 | if (base_addr[CyRTPRL] != ti) | |
44bafdf3 | 998 | base_addr[CyRTPRL] = ti; |
1da177e4 | 999 | if (base_addr[CyRTPRH] != 0) |
44bafdf3 | 1000 | base_addr[CyRTPRH] = 0; |
1da177e4 LT |
1001 | |
1002 | /* Set up RTS here also ????? RGH 141095 */ | |
44bafdf3 JS |
1003 | if (i == 0) { /* baud rate is zero, turn off line */ |
1004 | if ((base_addr[CyMSVR2] & CyDTR) == CyDTR) | |
1005 | base_addr[CyMSVR2] = 0; | |
1da177e4 | 1006 | #ifdef SERIAL_DEBUG_DTR |
44bafdf3 JS |
1007 | printk("cyc: %d: dropping DTR\n", __LINE__); |
1008 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], | |
1009 | base_addr[CyMSVR2]); | |
1da177e4 | 1010 | #endif |
44bafdf3 JS |
1011 | } else { |
1012 | if ((base_addr[CyMSVR2] & CyDTR) != CyDTR) | |
1013 | base_addr[CyMSVR2] = CyDTR; | |
1da177e4 | 1014 | #ifdef SERIAL_DEBUG_DTR |
44bafdf3 JS |
1015 | printk("cyc: %d: raising DTR\n", __LINE__); |
1016 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], | |
1017 | base_addr[CyMSVR2]); | |
1da177e4 LT |
1018 | #endif |
1019 | } | |
1020 | ||
44bafdf3 JS |
1021 | if (info->tty) { |
1022 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
1da177e4 LT |
1023 | } |
1024 | ||
44bafdf3 | 1025 | local_irq_restore(flags); |
1da177e4 | 1026 | |
44bafdf3 | 1027 | } /* config_setup */ |
1da177e4 | 1028 | |
a5b08c66 | 1029 | static int cy_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1030 | { |
c9f19e96 | 1031 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 | 1032 | unsigned long flags; |
1da177e4 LT |
1033 | |
1034 | #ifdef SERIAL_DEBUG_IO | |
44bafdf3 | 1035 | printk("cy_put_char %s(0x%02x)\n", tty->name, ch); |
1da177e4 LT |
1036 | #endif |
1037 | ||
44bafdf3 | 1038 | if (serial_paranoia_check(info, tty->name, "cy_put_char")) |
a5b08c66 | 1039 | return 0; |
1da177e4 | 1040 | |
44bafdf3 | 1041 | if (!info->xmit_buf) |
63a59fa7 | 1042 | return 0; |
1da177e4 | 1043 | |
44bafdf3 | 1044 | local_irq_save(flags); |
1da177e4 | 1045 | if (info->xmit_cnt >= PAGE_SIZE - 1) { |
44bafdf3 | 1046 | local_irq_restore(flags); |
a5b08c66 | 1047 | return 0; |
1da177e4 LT |
1048 | } |
1049 | ||
1050 | info->xmit_buf[info->xmit_head++] = ch; | |
1051 | info->xmit_head &= PAGE_SIZE - 1; | |
1052 | info->xmit_cnt++; | |
44bafdf3 | 1053 | local_irq_restore(flags); |
a5b08c66 | 1054 | return 1; |
44bafdf3 | 1055 | } /* cy_put_char */ |
1da177e4 | 1056 | |
44bafdf3 | 1057 | static void cy_flush_chars(struct tty_struct *tty) |
1da177e4 | 1058 | { |
c9f19e96 | 1059 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1060 | unsigned long flags; |
1061 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
1062 | int channel; | |
1063 | ||
1da177e4 | 1064 | #ifdef SERIAL_DEBUG_IO |
44bafdf3 | 1065 | printk("cy_flush_chars %s\n", tty->name); /* */ |
1da177e4 LT |
1066 | #endif |
1067 | ||
44bafdf3 JS |
1068 | if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) |
1069 | return; | |
1da177e4 | 1070 | |
44bafdf3 JS |
1071 | if (info->xmit_cnt <= 0 || tty->stopped |
1072 | || tty->hw_stopped || !info->xmit_buf) | |
1073 | return; | |
1da177e4 | 1074 | |
44bafdf3 | 1075 | channel = info->line; |
1da177e4 | 1076 | |
44bafdf3 | 1077 | local_irq_save(flags); |
1da177e4 LT |
1078 | base_addr[CyCAR] = channel; |
1079 | base_addr[CyIER] |= CyTxMpty; | |
44bafdf3 JS |
1080 | local_irq_restore(flags); |
1081 | } /* cy_flush_chars */ | |
1da177e4 LT |
1082 | |
1083 | /* This routine gets called when tty_write has put something into | |
1084 | the write_queue. If the port is not already transmitting stuff, | |
1085 | start it off by enabling interrupts. The interrupt service | |
1086 | routine will then ensure that the characters are sent. If the | |
1087 | port is already active, there is no need to kick it. | |
1088 | */ | |
44bafdf3 | 1089 | static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count) |
1da177e4 | 1090 | { |
c9f19e96 | 1091 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1092 | unsigned long flags; |
1093 | int c, total = 0; | |
1da177e4 LT |
1094 | |
1095 | #ifdef SERIAL_DEBUG_IO | |
44bafdf3 | 1096 | printk("cy_write %s\n", tty->name); /* */ |
1da177e4 LT |
1097 | #endif |
1098 | ||
44bafdf3 JS |
1099 | if (serial_paranoia_check(info, tty->name, "cy_write")) { |
1100 | return 0; | |
1101 | } | |
1da177e4 | 1102 | |
44bafdf3 JS |
1103 | if (!info->xmit_buf) { |
1104 | return 0; | |
1105 | } | |
1da177e4 | 1106 | |
44bafdf3 JS |
1107 | while (1) { |
1108 | local_irq_save(flags); | |
1109 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, | |
1110 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
1111 | if (c <= 0) { | |
1112 | local_irq_restore(flags); | |
1113 | break; | |
1114 | } | |
1115 | ||
1116 | memcpy(info->xmit_buf + info->xmit_head, buf, c); | |
1117 | info->xmit_head = | |
1118 | (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1); | |
1119 | info->xmit_cnt += c; | |
1120 | local_irq_restore(flags); | |
1121 | ||
1122 | buf += c; | |
1123 | count -= c; | |
1124 | total += c; | |
1125 | } | |
1126 | ||
1127 | if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) { | |
1128 | start_xmit(info); | |
1129 | } | |
1130 | return total; | |
1131 | } /* cy_write */ | |
1132 | ||
1133 | static int cy_write_room(struct tty_struct *tty) | |
1da177e4 | 1134 | { |
c9f19e96 | 1135 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1136 | int ret; |
1137 | ||
1da177e4 | 1138 | #ifdef SERIAL_DEBUG_IO |
44bafdf3 | 1139 | printk("cy_write_room %s\n", tty->name); /* */ |
1da177e4 LT |
1140 | #endif |
1141 | ||
44bafdf3 JS |
1142 | if (serial_paranoia_check(info, tty->name, "cy_write_room")) |
1143 | return 0; | |
1144 | ret = PAGE_SIZE - info->xmit_cnt - 1; | |
1145 | if (ret < 0) | |
1146 | ret = 0; | |
1147 | return ret; | |
1148 | } /* cy_write_room */ | |
1da177e4 | 1149 | |
44bafdf3 | 1150 | static int cy_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1151 | { |
c9f19e96 | 1152 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 | 1153 | |
1da177e4 | 1154 | #ifdef SERIAL_DEBUG_IO |
44bafdf3 | 1155 | printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */ |
1da177e4 LT |
1156 | #endif |
1157 | ||
44bafdf3 JS |
1158 | if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) |
1159 | return 0; | |
1da177e4 | 1160 | |
44bafdf3 JS |
1161 | return info->xmit_cnt; |
1162 | } /* cy_chars_in_buffer */ | |
1da177e4 | 1163 | |
44bafdf3 | 1164 | static void cy_flush_buffer(struct tty_struct *tty) |
1da177e4 | 1165 | { |
c9f19e96 | 1166 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1167 | unsigned long flags; |
1168 | ||
1da177e4 | 1169 | #ifdef SERIAL_DEBUG_IO |
44bafdf3 | 1170 | printk("cy_flush_buffer %s\n", tty->name); /* */ |
1da177e4 LT |
1171 | #endif |
1172 | ||
44bafdf3 JS |
1173 | if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) |
1174 | return; | |
1175 | local_irq_save(flags); | |
1da177e4 | 1176 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
44bafdf3 JS |
1177 | local_irq_restore(flags); |
1178 | tty_wakeup(tty); | |
1179 | } /* cy_flush_buffer */ | |
1da177e4 LT |
1180 | |
1181 | /* This routine is called by the upper-layer tty layer to signal | |
1182 | that incoming characters should be throttled or that the | |
1183 | throttle should be released. | |
1184 | */ | |
44bafdf3 | 1185 | static void cy_throttle(struct tty_struct *tty) |
1da177e4 | 1186 | { |
c9f19e96 | 1187 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1188 | unsigned long flags; |
1189 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
1190 | int channel; | |
1da177e4 LT |
1191 | |
1192 | #ifdef SERIAL_DEBUG_THROTTLE | |
44bafdf3 JS |
1193 | char buf[64]; |
1194 | ||
1195 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
1196 | tty->ldisc.chars_in_buffer(tty)); | |
1197 | printk("cy_throttle %s\n", tty->name); | |
1da177e4 LT |
1198 | #endif |
1199 | ||
44bafdf3 JS |
1200 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) { |
1201 | return; | |
1202 | } | |
1da177e4 | 1203 | |
44bafdf3 JS |
1204 | if (I_IXOFF(tty)) { |
1205 | info->x_char = STOP_CHAR(tty); | |
1206 | /* Should use the "Send Special Character" feature!!! */ | |
1207 | } | |
1da177e4 | 1208 | |
44bafdf3 | 1209 | channel = info->line; |
1da177e4 | 1210 | |
44bafdf3 JS |
1211 | local_irq_save(flags); |
1212 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 | 1213 | base_addr[CyMSVR1] = 0; |
44bafdf3 JS |
1214 | local_irq_restore(flags); |
1215 | } /* cy_throttle */ | |
1da177e4 | 1216 | |
44bafdf3 | 1217 | static void cy_unthrottle(struct tty_struct *tty) |
1da177e4 | 1218 | { |
c9f19e96 | 1219 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1220 | unsigned long flags; |
1221 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
1222 | int channel; | |
1da177e4 LT |
1223 | |
1224 | #ifdef SERIAL_DEBUG_THROTTLE | |
44bafdf3 JS |
1225 | char buf[64]; |
1226 | ||
1227 | printk("throttle %s: %d....\n", tty_name(tty, buf), | |
1228 | tty->ldisc.chars_in_buffer(tty)); | |
1229 | printk("cy_unthrottle %s\n", tty->name); | |
1da177e4 LT |
1230 | #endif |
1231 | ||
44bafdf3 JS |
1232 | if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) { |
1233 | return; | |
1234 | } | |
1da177e4 | 1235 | |
44bafdf3 JS |
1236 | if (I_IXOFF(tty)) { |
1237 | info->x_char = START_CHAR(tty); | |
1238 | /* Should use the "Send Special Character" feature!!! */ | |
1239 | } | |
1da177e4 | 1240 | |
44bafdf3 | 1241 | channel = info->line; |
1da177e4 | 1242 | |
44bafdf3 JS |
1243 | local_irq_save(flags); |
1244 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 | 1245 | base_addr[CyMSVR1] = CyRTS; |
44bafdf3 JS |
1246 | local_irq_restore(flags); |
1247 | } /* cy_unthrottle */ | |
1da177e4 LT |
1248 | |
1249 | static int | |
44bafdf3 JS |
1250 | get_serial_info(struct cyclades_port *info, |
1251 | struct serial_struct __user * retinfo) | |
1da177e4 | 1252 | { |
44bafdf3 | 1253 | struct serial_struct tmp; |
1da177e4 LT |
1254 | |
1255 | /* CP('g'); */ | |
44bafdf3 JS |
1256 | if (!retinfo) |
1257 | return -EFAULT; | |
1258 | memset(&tmp, 0, sizeof(tmp)); | |
1259 | tmp.type = info->type; | |
1260 | tmp.line = info->line; | |
1261 | tmp.port = info->line; | |
1262 | tmp.irq = 0; | |
1263 | tmp.flags = info->flags; | |
1264 | tmp.baud_base = 0; /*!!! */ | |
1265 | tmp.close_delay = info->close_delay; | |
1266 | tmp.custom_divisor = 0; /*!!! */ | |
1267 | tmp.hub6 = 0; /*!!! */ | |
1268 | return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; | |
1269 | } /* get_serial_info */ | |
1da177e4 LT |
1270 | |
1271 | static int | |
44bafdf3 JS |
1272 | set_serial_info(struct cyclades_port *info, |
1273 | struct serial_struct __user * new_info) | |
1da177e4 | 1274 | { |
44bafdf3 JS |
1275 | struct serial_struct new_serial; |
1276 | struct cyclades_port old_info; | |
1da177e4 LT |
1277 | |
1278 | /* CP('s'); */ | |
44bafdf3 JS |
1279 | if (!new_info) |
1280 | return -EFAULT; | |
1281 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) | |
1282 | return -EFAULT; | |
1283 | old_info = *info; | |
1284 | ||
1285 | if (!capable(CAP_SYS_ADMIN)) { | |
1286 | if ((new_serial.close_delay != info->close_delay) || | |
1287 | ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != | |
1288 | (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))) | |
1289 | return -EPERM; | |
1290 | info->flags = ((info->flags & ~ASYNC_USR_MASK) | | |
1291 | (new_serial.flags & ASYNC_USR_MASK)); | |
1292 | goto check_and_exit; | |
1293 | } | |
1da177e4 | 1294 | |
44bafdf3 JS |
1295 | /* |
1296 | * OK, past this point, all the error checking has been done. | |
1297 | * At this point, we start making changes..... | |
1298 | */ | |
1da177e4 | 1299 | |
44bafdf3 JS |
1300 | info->flags = ((info->flags & ~ASYNC_FLAGS) | |
1301 | (new_serial.flags & ASYNC_FLAGS)); | |
1302 | info->close_delay = new_serial.close_delay; | |
1da177e4 | 1303 | |
44bafdf3 JS |
1304 | check_and_exit: |
1305 | if (info->flags & ASYNC_INITIALIZED) { | |
1306 | config_setup(info); | |
1307 | return 0; | |
1308 | } | |
1309 | return startup(info); | |
1310 | } /* set_serial_info */ | |
1da177e4 | 1311 | |
44bafdf3 JS |
1312 | static int cy_tiocmget(struct tty_struct *tty, struct file *file) |
1313 | { | |
c9f19e96 | 1314 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1315 | int channel; |
1316 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
1317 | unsigned long flags; | |
1318 | unsigned char status; | |
1da177e4 | 1319 | |
44bafdf3 | 1320 | channel = info->line; |
1da177e4 | 1321 | |
44bafdf3 JS |
1322 | local_irq_save(flags); |
1323 | base_addr[CyCAR] = (u_char) channel; | |
1324 | status = base_addr[CyMSVR1] | base_addr[CyMSVR2]; | |
1325 | local_irq_restore(flags); | |
1da177e4 | 1326 | |
44bafdf3 JS |
1327 | return ((status & CyRTS) ? TIOCM_RTS : 0) |
1328 | | ((status & CyDTR) ? TIOCM_DTR : 0) | |
1329 | | ((status & CyDCD) ? TIOCM_CAR : 0) | |
1330 | | ((status & CyDSR) ? TIOCM_DSR : 0) | |
1331 | | ((status & CyCTS) ? TIOCM_CTS : 0); | |
1332 | } /* cy_tiocmget */ | |
1da177e4 LT |
1333 | |
1334 | static int | |
1335 | cy_tiocmset(struct tty_struct *tty, struct file *file, | |
1336 | unsigned int set, unsigned int clear) | |
1337 | { | |
c9f19e96 | 1338 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1339 | int channel; |
1340 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; | |
1341 | unsigned long flags; | |
1342 | ||
1343 | channel = info->line; | |
1344 | ||
1345 | if (set & TIOCM_RTS) { | |
1346 | local_irq_save(flags); | |
1347 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 | 1348 | base_addr[CyMSVR1] = CyRTS; |
44bafdf3 | 1349 | local_irq_restore(flags); |
1da177e4 | 1350 | } |
44bafdf3 JS |
1351 | if (set & TIOCM_DTR) { |
1352 | local_irq_save(flags); | |
1353 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 | 1354 | /* CP('S');CP('2'); */ |
44bafdf3 | 1355 | base_addr[CyMSVR2] = CyDTR; |
1da177e4 | 1356 | #ifdef SERIAL_DEBUG_DTR |
44bafdf3 JS |
1357 | printk("cyc: %d: raising DTR\n", __LINE__); |
1358 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], | |
1359 | base_addr[CyMSVR2]); | |
1da177e4 | 1360 | #endif |
44bafdf3 | 1361 | local_irq_restore(flags); |
1da177e4 LT |
1362 | } |
1363 | ||
44bafdf3 JS |
1364 | if (clear & TIOCM_RTS) { |
1365 | local_irq_save(flags); | |
1366 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 | 1367 | base_addr[CyMSVR1] = 0; |
44bafdf3 | 1368 | local_irq_restore(flags); |
1da177e4 | 1369 | } |
44bafdf3 JS |
1370 | if (clear & TIOCM_DTR) { |
1371 | local_irq_save(flags); | |
1372 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 | 1373 | /* CP('C');CP('2'); */ |
44bafdf3 | 1374 | base_addr[CyMSVR2] = 0; |
1da177e4 | 1375 | #ifdef SERIAL_DEBUG_DTR |
44bafdf3 JS |
1376 | printk("cyc: %d: dropping DTR\n", __LINE__); |
1377 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], | |
1378 | base_addr[CyMSVR2]); | |
1da177e4 | 1379 | #endif |
44bafdf3 | 1380 | local_irq_restore(flags); |
1da177e4 LT |
1381 | } |
1382 | ||
44bafdf3 JS |
1383 | return 0; |
1384 | } /* set_modem_info */ | |
1385 | ||
1386 | static void send_break(struct cyclades_port *info, int duration) | |
1387 | { /* Let the transmit ISR take care of this (since it | |
1388 | requires stuffing characters into the output stream). | |
1389 | */ | |
1390 | info->x_break = duration; | |
1391 | if (!info->xmit_cnt) { | |
1392 | start_xmit(info); | |
1393 | } | |
1394 | } /* send_break */ | |
1da177e4 LT |
1395 | |
1396 | static int | |
44bafdf3 | 1397 | get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon) |
1da177e4 LT |
1398 | { |
1399 | ||
44bafdf3 JS |
1400 | if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) |
1401 | return -EFAULT; | |
1402 | info->mon.int_count = 0; | |
1403 | info->mon.char_count = 0; | |
1404 | info->mon.char_max = 0; | |
1405 | info->mon.char_last = 0; | |
1406 | return 0; | |
1da177e4 LT |
1407 | } |
1408 | ||
44bafdf3 | 1409 | static int set_threshold(struct cyclades_port *info, unsigned long __user * arg) |
1da177e4 | 1410 | { |
44bafdf3 JS |
1411 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; |
1412 | unsigned long value; | |
1413 | int channel; | |
1414 | ||
1415 | if (get_user(value, arg)) | |
1416 | return -EFAULT; | |
1417 | ||
1418 | channel = info->line; | |
1419 | info->cor4 &= ~CyREC_FIFO; | |
1420 | info->cor4 |= value & CyREC_FIFO; | |
1421 | base_addr[CyCOR4] = info->cor4; | |
1422 | return 0; | |
1da177e4 LT |
1423 | } |
1424 | ||
1425 | static int | |
44bafdf3 | 1426 | get_threshold(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 1427 | { |
44bafdf3 JS |
1428 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; |
1429 | int channel; | |
1430 | unsigned long tmp; | |
1431 | ||
1432 | channel = info->line; | |
1433 | ||
1434 | tmp = base_addr[CyCOR4] & CyREC_FIFO; | |
1435 | return put_user(tmp, value); | |
1da177e4 LT |
1436 | } |
1437 | ||
1438 | static int | |
44bafdf3 | 1439 | set_default_threshold(struct cyclades_port *info, unsigned long __user * arg) |
1da177e4 | 1440 | { |
44bafdf3 | 1441 | unsigned long value; |
1da177e4 | 1442 | |
44bafdf3 JS |
1443 | if (get_user(value, arg)) |
1444 | return -EFAULT; | |
1da177e4 | 1445 | |
44bafdf3 JS |
1446 | info->default_threshold = value & 0x0f; |
1447 | return 0; | |
1da177e4 LT |
1448 | } |
1449 | ||
1450 | static int | |
44bafdf3 | 1451 | get_default_threshold(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 1452 | { |
44bafdf3 | 1453 | return put_user(info->default_threshold, value); |
1da177e4 LT |
1454 | } |
1455 | ||
44bafdf3 | 1456 | static int set_timeout(struct cyclades_port *info, unsigned long __user * arg) |
1da177e4 | 1457 | { |
44bafdf3 JS |
1458 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; |
1459 | int channel; | |
1460 | unsigned long value; | |
1461 | ||
1462 | if (get_user(value, arg)) | |
1463 | return -EFAULT; | |
1464 | ||
1465 | channel = info->line; | |
1466 | ||
1467 | base_addr[CyRTPRL] = value & 0xff; | |
1468 | base_addr[CyRTPRH] = (value >> 8) & 0xff; | |
1469 | return 0; | |
1da177e4 LT |
1470 | } |
1471 | ||
44bafdf3 | 1472 | static int get_timeout(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 1473 | { |
44bafdf3 JS |
1474 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; |
1475 | int channel; | |
1476 | unsigned long tmp; | |
1477 | ||
1478 | channel = info->line; | |
1479 | ||
1480 | tmp = base_addr[CyRTPRL]; | |
1481 | return put_user(tmp, value); | |
1da177e4 LT |
1482 | } |
1483 | ||
44bafdf3 | 1484 | static int set_default_timeout(struct cyclades_port *info, unsigned long value) |
1da177e4 | 1485 | { |
44bafdf3 JS |
1486 | info->default_timeout = value & 0xff; |
1487 | return 0; | |
1da177e4 LT |
1488 | } |
1489 | ||
1490 | static int | |
44bafdf3 | 1491 | get_default_timeout(struct cyclades_port *info, unsigned long __user * value) |
1da177e4 | 1492 | { |
44bafdf3 | 1493 | return put_user(info->default_timeout, value); |
1da177e4 LT |
1494 | } |
1495 | ||
1496 | static int | |
44bafdf3 JS |
1497 | cy_ioctl(struct tty_struct *tty, struct file *file, |
1498 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1499 | { |
c9f19e96 | 1500 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 JS |
1501 | int ret_val = 0; |
1502 | void __user *argp = (void __user *)arg; | |
1da177e4 LT |
1503 | |
1504 | #ifdef SERIAL_DEBUG_OTHER | |
44bafdf3 JS |
1505 | printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */ |
1506 | #endif | |
1507 | ||
ec79d605 | 1508 | tty_lock(); |
638157bc | 1509 | |
44bafdf3 JS |
1510 | switch (cmd) { |
1511 | case CYGETMON: | |
1512 | ret_val = get_mon_info(info, argp); | |
1513 | break; | |
1514 | case CYGETTHRESH: | |
1515 | ret_val = get_threshold(info, argp); | |
1516 | break; | |
1517 | case CYSETTHRESH: | |
1518 | ret_val = set_threshold(info, argp); | |
1519 | break; | |
1520 | case CYGETDEFTHRESH: | |
1521 | ret_val = get_default_threshold(info, argp); | |
1522 | break; | |
1523 | case CYSETDEFTHRESH: | |
1524 | ret_val = set_default_threshold(info, argp); | |
1525 | break; | |
1526 | case CYGETTIMEOUT: | |
1527 | ret_val = get_timeout(info, argp); | |
1528 | break; | |
1529 | case CYSETTIMEOUT: | |
1530 | ret_val = set_timeout(info, argp); | |
1531 | break; | |
1532 | case CYGETDEFTIMEOUT: | |
1533 | ret_val = get_default_timeout(info, argp); | |
1534 | break; | |
1535 | case CYSETDEFTIMEOUT: | |
1536 | ret_val = set_default_timeout(info, (unsigned long)arg); | |
1537 | break; | |
1538 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1539 | ret_val = tty_check_change(tty); | |
1540 | if (ret_val) | |
1541 | break; | |
1542 | tty_wait_until_sent(tty, 0); | |
1543 | if (!arg) | |
1544 | send_break(info, HZ / 4); /* 1/4 second */ | |
1545 | break; | |
1546 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1547 | ret_val = tty_check_change(tty); | |
1548 | if (ret_val) | |
1549 | break; | |
1550 | tty_wait_until_sent(tty, 0); | |
1551 | send_break(info, arg ? arg * (HZ / 10) : HZ / 4); | |
1da177e4 | 1552 | break; |
1da177e4 LT |
1553 | |
1554 | /* The following commands are incompletely implemented!!! */ | |
44bafdf3 JS |
1555 | case TIOCGSERIAL: |
1556 | ret_val = get_serial_info(info, argp); | |
1557 | break; | |
1558 | case TIOCSSERIAL: | |
1559 | ret_val = set_serial_info(info, argp); | |
1560 | break; | |
1561 | default: | |
1562 | ret_val = -ENOIOCTLCMD; | |
1563 | } | |
ec79d605 | 1564 | tty_unlock(); |
1da177e4 LT |
1565 | |
1566 | #ifdef SERIAL_DEBUG_OTHER | |
44bafdf3 | 1567 | printk("cy_ioctl done\n"); |
1da177e4 LT |
1568 | #endif |
1569 | ||
44bafdf3 JS |
1570 | return ret_val; |
1571 | } /* cy_ioctl */ | |
1da177e4 | 1572 | |
44bafdf3 | 1573 | static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 | 1574 | { |
c9f19e96 | 1575 | struct cyclades_port *info = tty->driver_data; |
1da177e4 LT |
1576 | |
1577 | #ifdef SERIAL_DEBUG_OTHER | |
44bafdf3 | 1578 | printk("cy_set_termios %s\n", tty->name); |
1da177e4 LT |
1579 | #endif |
1580 | ||
44bafdf3 JS |
1581 | if (tty->termios->c_cflag == old_termios->c_cflag) |
1582 | return; | |
1583 | config_setup(info); | |
1da177e4 | 1584 | |
44bafdf3 JS |
1585 | if ((old_termios->c_cflag & CRTSCTS) && |
1586 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1587 | tty->stopped = 0; | |
1588 | cy_start(tty); | |
1589 | } | |
1da177e4 | 1590 | #ifdef tytso_patch_94Nov25_1726 |
44bafdf3 JS |
1591 | if (!(old_termios->c_cflag & CLOCAL) && |
1592 | (tty->termios->c_cflag & CLOCAL)) | |
1593 | wake_up_interruptible(&info->open_wait); | |
1da177e4 | 1594 | #endif |
44bafdf3 | 1595 | } /* cy_set_termios */ |
1da177e4 | 1596 | |
44bafdf3 | 1597 | static void cy_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1598 | { |
c9f19e96 | 1599 | struct cyclades_port *info = tty->driver_data; |
1da177e4 LT |
1600 | |
1601 | /* CP('C'); */ | |
1602 | #ifdef SERIAL_DEBUG_OTHER | |
44bafdf3 | 1603 | printk("cy_close %s\n", tty->name); |
1da177e4 LT |
1604 | #endif |
1605 | ||
44bafdf3 JS |
1606 | if (!info || serial_paranoia_check(info, tty->name, "cy_close")) { |
1607 | return; | |
1608 | } | |
1da177e4 | 1609 | #ifdef SERIAL_DEBUG_OPEN |
44bafdf3 JS |
1610 | printk("cy_close %s, count = %d\n", tty->name, info->count); |
1611 | #endif | |
1612 | ||
1613 | if ((tty->count == 1) && (info->count != 1)) { | |
1614 | /* | |
1615 | * Uh, oh. tty->count is 1, which means that the tty | |
1616 | * structure will be freed. Info->count should always | |
1617 | * be one in these conditions. If it's greater than | |
1618 | * one, we've got real problems, since it means the | |
1619 | * serial port won't be shutdown. | |
1620 | */ | |
1621 | printk("cy_close: bad serial port count; tty->count is 1, " | |
1622 | "info->count is %d\n", info->count); | |
1623 | info->count = 1; | |
1624 | } | |
1da177e4 | 1625 | #ifdef SERIAL_DEBUG_COUNT |
44bafdf3 JS |
1626 | printk("cyc: %d: decrementing count to %d\n", __LINE__, |
1627 | info->count - 1); | |
1da177e4 | 1628 | #endif |
44bafdf3 JS |
1629 | if (--info->count < 0) { |
1630 | printk("cy_close: bad serial port count for ttys%d: %d\n", | |
1631 | info->line, info->count); | |
1da177e4 | 1632 | #ifdef SERIAL_DEBUG_COUNT |
44bafdf3 | 1633 | printk("cyc: %d: setting count to 0\n", __LINE__); |
1da177e4 | 1634 | #endif |
44bafdf3 | 1635 | info->count = 0; |
1da177e4 | 1636 | } |
44bafdf3 JS |
1637 | if (info->count) |
1638 | return; | |
1639 | info->flags |= ASYNC_CLOSING; | |
1640 | if (info->flags & ASYNC_INITIALIZED) | |
1641 | tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ | |
1642 | shutdown(info); | |
978e595f | 1643 | cy_flush_buffer(tty); |
44bafdf3 | 1644 | tty_ldisc_flush(tty); |
44bafdf3 JS |
1645 | info->tty = NULL; |
1646 | if (info->blocked_open) { | |
1647 | if (info->close_delay) { | |
1648 | msleep_interruptible(jiffies_to_msecs | |
1649 | (info->close_delay)); | |
1650 | } | |
1651 | wake_up_interruptible(&info->open_wait); | |
1652 | } | |
1653 | info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); | |
1654 | wake_up_interruptible(&info->close_wait); | |
1da177e4 LT |
1655 | |
1656 | #ifdef SERIAL_DEBUG_OTHER | |
44bafdf3 | 1657 | printk("cy_close done\n"); |
1da177e4 | 1658 | #endif |
44bafdf3 | 1659 | } /* cy_close */ |
1da177e4 LT |
1660 | |
1661 | /* | |
1662 | * cy_hangup() --- called by tty_hangup() when a hangup is signaled. | |
1663 | */ | |
44bafdf3 | 1664 | void cy_hangup(struct tty_struct *tty) |
1da177e4 | 1665 | { |
c9f19e96 | 1666 | struct cyclades_port *info = tty->driver_data; |
44bafdf3 | 1667 | |
1da177e4 | 1668 | #ifdef SERIAL_DEBUG_OTHER |
44bafdf3 | 1669 | printk("cy_hangup %s\n", tty->name); /* */ |
1da177e4 LT |
1670 | #endif |
1671 | ||
44bafdf3 JS |
1672 | if (serial_paranoia_check(info, tty->name, "cy_hangup")) |
1673 | return; | |
1674 | ||
1675 | shutdown(info); | |
1da177e4 | 1676 | #if 0 |
44bafdf3 JS |
1677 | info->event = 0; |
1678 | info->count = 0; | |
1da177e4 | 1679 | #ifdef SERIAL_DEBUG_COUNT |
44bafdf3 | 1680 | printk("cyc: %d: setting count to 0\n", __LINE__); |
1da177e4 | 1681 | #endif |
44bafdf3 | 1682 | info->tty = 0; |
1da177e4 | 1683 | #endif |
44bafdf3 JS |
1684 | info->flags &= ~ASYNC_NORMAL_ACTIVE; |
1685 | wake_up_interruptible(&info->open_wait); | |
1686 | } /* cy_hangup */ | |
1da177e4 LT |
1687 | |
1688 | /* | |
1689 | * ------------------------------------------------------------ | |
1690 | * cy_open() and friends | |
1691 | * ------------------------------------------------------------ | |
1692 | */ | |
1693 | ||
1694 | static int | |
44bafdf3 JS |
1695 | block_til_ready(struct tty_struct *tty, struct file *filp, |
1696 | struct cyclades_port *info) | |
1da177e4 | 1697 | { |
44bafdf3 JS |
1698 | DECLARE_WAITQUEUE(wait, current); |
1699 | unsigned long flags; | |
1700 | int channel; | |
1701 | int retval; | |
1702 | volatile u_char *base_addr = (u_char *) BASE_ADDR; | |
1703 | ||
1704 | /* | |
1705 | * If the device is in the middle of being closed, then block | |
1706 | * until it's done, and then try again. | |
1707 | */ | |
1708 | if (info->flags & ASYNC_CLOSING) { | |
1709 | interruptible_sleep_on(&info->close_wait); | |
1710 | if (info->flags & ASYNC_HUP_NOTIFY) { | |
1711 | return -EAGAIN; | |
1712 | } else { | |
1713 | return -ERESTARTSYS; | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | /* | |
1718 | * If non-blocking mode is set, then make the check up front | |
1719 | * and then exit. | |
1720 | */ | |
1721 | if (filp->f_flags & O_NONBLOCK) { | |
1722 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1723 | return 0; | |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * Block waiting for the carrier detect and the line to become | |
1728 | * free (i.e., not in use by the callout). While we are in | |
1729 | * this loop, info->count is dropped by one, so that | |
1730 | * cy_close() knows when to free things. We restore it upon | |
1731 | * exit, either normal or abnormal. | |
1732 | */ | |
1733 | retval = 0; | |
1734 | add_wait_queue(&info->open_wait, &wait); | |
1da177e4 | 1735 | #ifdef SERIAL_DEBUG_OPEN |
44bafdf3 JS |
1736 | printk("block_til_ready before block: %s, count = %d\n", |
1737 | tty->name, info->count); | |
1738 | /**/ | |
1da177e4 | 1739 | #endif |
44bafdf3 | 1740 | info->count--; |
1da177e4 | 1741 | #ifdef SERIAL_DEBUG_COUNT |
44bafdf3 | 1742 | printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count); |
1da177e4 | 1743 | #endif |
44bafdf3 | 1744 | info->blocked_open++; |
1da177e4 | 1745 | |
44bafdf3 | 1746 | channel = info->line; |
1da177e4 | 1747 | |
44bafdf3 JS |
1748 | while (1) { |
1749 | local_irq_save(flags); | |
1750 | base_addr[CyCAR] = (u_char) channel; | |
1751 | base_addr[CyMSVR1] = CyRTS; | |
1da177e4 | 1752 | /* CP('S');CP('4'); */ |
44bafdf3 | 1753 | base_addr[CyMSVR2] = CyDTR; |
1da177e4 | 1754 | #ifdef SERIAL_DEBUG_DTR |
44bafdf3 JS |
1755 | printk("cyc: %d: raising DTR\n", __LINE__); |
1756 | printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], | |
1757 | base_addr[CyMSVR2]); | |
1758 | #endif | |
1759 | local_irq_restore(flags); | |
1760 | set_current_state(TASK_INTERRUPTIBLE); | |
1761 | if (tty_hung_up_p(filp) | |
1762 | || !(info->flags & ASYNC_INITIALIZED)) { | |
1763 | if (info->flags & ASYNC_HUP_NOTIFY) { | |
1764 | retval = -EAGAIN; | |
1765 | } else { | |
1766 | retval = -ERESTARTSYS; | |
1767 | } | |
1768 | break; | |
1769 | } | |
1770 | local_irq_save(flags); | |
1771 | base_addr[CyCAR] = (u_char) channel; | |
1da177e4 | 1772 | /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */ |
44bafdf3 JS |
1773 | if (!(info->flags & ASYNC_CLOSING) |
1774 | && (C_CLOCAL(tty) | |
1775 | || (base_addr[CyMSVR1] & CyDCD))) { | |
1776 | local_irq_restore(flags); | |
1777 | break; | |
1778 | } | |
1779 | local_irq_restore(flags); | |
1780 | if (signal_pending(current)) { | |
1781 | retval = -ERESTARTSYS; | |
1782 | break; | |
1783 | } | |
1da177e4 | 1784 | #ifdef SERIAL_DEBUG_OPEN |
44bafdf3 JS |
1785 | printk("block_til_ready blocking: %s, count = %d\n", |
1786 | tty->name, info->count); | |
1787 | /**/ | |
1788 | #endif | |
e142a31d AB |
1789 | tty_unlock(); |
1790 | schedule(); | |
1791 | tty_lock(); | |
44bafdf3 | 1792 | } |
cc0a8fbb | 1793 | __set_current_state(TASK_RUNNING); |
44bafdf3 JS |
1794 | remove_wait_queue(&info->open_wait, &wait); |
1795 | if (!tty_hung_up_p(filp)) { | |
1796 | info->count++; | |
1da177e4 | 1797 | #ifdef SERIAL_DEBUG_COUNT |
44bafdf3 JS |
1798 | printk("cyc: %d: incrementing count to %d\n", __LINE__, |
1799 | info->count); | |
1da177e4 | 1800 | #endif |
44bafdf3 JS |
1801 | } |
1802 | info->blocked_open--; | |
1da177e4 | 1803 | #ifdef SERIAL_DEBUG_OPEN |
44bafdf3 JS |
1804 | printk("block_til_ready after blocking: %s, count = %d\n", |
1805 | tty->name, info->count); | |
1806 | /**/ | |
1da177e4 | 1807 | #endif |
44bafdf3 JS |
1808 | if (retval) |
1809 | return retval; | |
1810 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
1811 | return 0; | |
1812 | } /* block_til_ready */ | |
1da177e4 LT |
1813 | |
1814 | /* | |
1815 | * This routine is called whenever a serial port is opened. It | |
1816 | * performs the serial-specific initialization for the tty structure. | |
1817 | */ | |
44bafdf3 | 1818 | int cy_open(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1819 | { |
44bafdf3 JS |
1820 | struct cyclades_port *info; |
1821 | int retval, line; | |
1da177e4 LT |
1822 | |
1823 | /* CP('O'); */ | |
44bafdf3 JS |
1824 | line = tty->index; |
1825 | if ((line < 0) || (NR_PORTS <= line)) { | |
1826 | return -ENODEV; | |
1827 | } | |
1828 | info = &cy_port[line]; | |
1829 | if (info->line < 0) { | |
1830 | return -ENODEV; | |
1831 | } | |
1da177e4 | 1832 | #ifdef SERIAL_DEBUG_OTHER |
44bafdf3 | 1833 | printk("cy_open %s\n", tty->name); /* */ |
1da177e4 | 1834 | #endif |
44bafdf3 JS |
1835 | if (serial_paranoia_check(info, tty->name, "cy_open")) { |
1836 | return -ENODEV; | |
1837 | } | |
1da177e4 | 1838 | #ifdef SERIAL_DEBUG_OPEN |
44bafdf3 JS |
1839 | printk("cy_open %s, count = %d\n", tty->name, info->count); |
1840 | /**/ | |
1da177e4 | 1841 | #endif |
44bafdf3 | 1842 | info->count++; |
1da177e4 | 1843 | #ifdef SERIAL_DEBUG_COUNT |
44bafdf3 | 1844 | printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); |
1da177e4 | 1845 | #endif |
44bafdf3 JS |
1846 | tty->driver_data = info; |
1847 | info->tty = tty; | |
1da177e4 | 1848 | |
44bafdf3 JS |
1849 | /* |
1850 | * Start up serial port | |
1851 | */ | |
1852 | retval = startup(info); | |
1853 | if (retval) { | |
1854 | return retval; | |
1855 | } | |
1da177e4 | 1856 | |
44bafdf3 JS |
1857 | retval = block_til_ready(tty, filp, info); |
1858 | if (retval) { | |
1da177e4 | 1859 | #ifdef SERIAL_DEBUG_OPEN |
44bafdf3 JS |
1860 | printk("cy_open returning after block_til_ready with %d\n", |
1861 | retval); | |
1da177e4 | 1862 | #endif |
44bafdf3 JS |
1863 | return retval; |
1864 | } | |
1da177e4 | 1865 | #ifdef SERIAL_DEBUG_OPEN |
44bafdf3 JS |
1866 | printk("cy_open done\n"); |
1867 | /**/ | |
1da177e4 | 1868 | #endif |
44bafdf3 JS |
1869 | return 0; |
1870 | } /* cy_open */ | |
1da177e4 LT |
1871 | |
1872 | /* | |
1873 | * --------------------------------------------------------------------- | |
1874 | * serial167_init() and friends | |
1875 | * | |
1876 | * serial167_init() is called at boot-time to initialize the serial driver. | |
1877 | * --------------------------------------------------------------------- | |
1878 | */ | |
1879 | ||
1880 | /* | |
1881 | * This routine prints out the appropriate serial driver version | |
1882 | * number, and identifies which options were configured into this | |
1883 | * driver. | |
1884 | */ | |
44bafdf3 | 1885 | static void show_version(void) |
1da177e4 | 1886 | { |
44bafdf3 JS |
1887 | printk("MVME166/167 cd2401 driver\n"); |
1888 | } /* show_version */ | |
1da177e4 LT |
1889 | |
1890 | /* initialize chips on card -- return number of valid | |
1891 | chips (which is number of ports/4) */ | |
1892 | ||
1893 | /* | |
1894 | * This initialises the hardware to a reasonable state. It should | |
1895 | * probe the chip first so as to copy 166-Bug setup as a default for | |
1896 | * port 0. It initialises CMR to CyASYNC; that is never done again, so | |
1897 | * as to limit the number of CyINIT_CHAN commands in normal running. | |
1898 | * | |
1899 | * ... I wonder what I should do if this fails ... | |
1900 | */ | |
1901 | ||
44bafdf3 | 1902 | void mvme167_serial_console_setup(int cflag) |
1da177e4 | 1903 | { |
44bafdf3 | 1904 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; |
1da177e4 LT |
1905 | int ch; |
1906 | u_char spd; | |
1907 | u_char rcor, rbpr, badspeed = 0; | |
1908 | unsigned long flags; | |
1909 | ||
1910 | local_irq_save(flags); | |
1911 | ||
1912 | /* | |
1913 | * First probe channel zero of the chip, to see what speed has | |
1914 | * been selected. | |
1915 | */ | |
1916 | ||
1917 | base_addr[CyCAR] = 0; | |
1918 | ||
1919 | rcor = base_addr[CyRCOR] << 5; | |
1920 | rbpr = base_addr[CyRBPR]; | |
1921 | ||
1922 | for (spd = 0; spd < sizeof(baud_bpr); spd++) | |
1923 | if (rbpr == baud_bpr[spd] && rcor == baud_co[spd]) | |
1924 | break; | |
1925 | if (spd >= sizeof(baud_bpr)) { | |
1926 | spd = 14; /* 19200 */ | |
1927 | badspeed = 1; /* Failed to identify speed */ | |
1928 | } | |
1929 | initial_console_speed = spd; | |
1930 | ||
1931 | /* OK, we have chosen a speed, now reset and reinitialise */ | |
1932 | ||
44bafdf3 JS |
1933 | my_udelay(20000L); /* Allow time for any active o/p to complete */ |
1934 | if (base_addr[CyCCR] != 0x00) { | |
1935 | local_irq_restore(flags); | |
1936 | /* printk(" chip is never idle (CCR != 0)\n"); */ | |
1937 | return; | |
1938 | } | |
1da177e4 | 1939 | |
44bafdf3 JS |
1940 | base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */ |
1941 | my_udelay(1000L); | |
1da177e4 | 1942 | |
44bafdf3 JS |
1943 | if (base_addr[CyGFRCR] == 0x00) { |
1944 | local_irq_restore(flags); | |
1945 | /* printk(" chip is not responding (GFRCR stayed 0)\n"); */ | |
1946 | return; | |
1947 | } | |
1da177e4 LT |
1948 | |
1949 | /* | |
1950 | * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms | |
1951 | * tick | |
1952 | */ | |
1953 | ||
1954 | base_addr[CyTPR] = 10; | |
1955 | ||
44bafdf3 JS |
1956 | base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */ |
1957 | base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */ | |
1958 | base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */ | |
1da177e4 LT |
1959 | |
1960 | /* | |
1961 | * Attempt to set up all channels to something reasonable, and | |
1962 | * bang out a INIT_CHAN command. We should then be able to limit | |
9ddc5b6f | 1963 | * the amount of fiddling we have to do in normal running. |
1da177e4 LT |
1964 | */ |
1965 | ||
44bafdf3 JS |
1966 | for (ch = 3; ch >= 0; ch--) { |
1967 | base_addr[CyCAR] = (u_char) ch; | |
1da177e4 LT |
1968 | base_addr[CyIER] = 0; |
1969 | base_addr[CyCMR] = CyASYNC; | |
44bafdf3 | 1970 | base_addr[CyLICR] = (u_char) ch << 2; |
1da177e4 LT |
1971 | base_addr[CyLIVR] = 0x5c; |
1972 | base_addr[CyTCOR] = baud_co[spd]; | |
1973 | base_addr[CyTBPR] = baud_bpr[spd]; | |
1974 | base_addr[CyRCOR] = baud_co[spd] >> 5; | |
1975 | base_addr[CyRBPR] = baud_bpr[spd]; | |
1976 | base_addr[CySCHR1] = 'Q' & 0x1f; | |
1977 | base_addr[CySCHR2] = 'X' & 0x1f; | |
1978 | base_addr[CySCRL] = 0; | |
1979 | base_addr[CySCRH] = 0; | |
1980 | base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE; | |
1981 | base_addr[CyCOR2] = 0; | |
1982 | base_addr[CyCOR3] = Cy_1_STOP; | |
1983 | base_addr[CyCOR4] = baud_cor4[spd]; | |
1984 | base_addr[CyCOR5] = 0; | |
1985 | base_addr[CyCOR6] = 0; | |
1986 | base_addr[CyCOR7] = 0; | |
1987 | base_addr[CyRTPRL] = 2; | |
1988 | base_addr[CyRTPRH] = 0; | |
44bafdf3 JS |
1989 | base_addr[CyMSVR1] = 0; |
1990 | base_addr[CyMSVR2] = 0; | |
1991 | write_cy_cmd(base_addr, CyINIT_CHAN | CyDIS_RCVR | CyDIS_XMTR); | |
1da177e4 LT |
1992 | } |
1993 | ||
1994 | /* | |
1995 | * Now do specials for channel zero.... | |
1996 | */ | |
1997 | ||
44bafdf3 JS |
1998 | base_addr[CyMSVR1] = CyRTS; |
1999 | base_addr[CyMSVR2] = CyDTR; | |
1da177e4 | 2000 | base_addr[CyIER] = CyRxData; |
44bafdf3 | 2001 | write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR); |
1da177e4 LT |
2002 | |
2003 | local_irq_restore(flags); | |
2004 | ||
2005 | my_udelay(20000L); /* Let it all settle down */ | |
2006 | ||
44bafdf3 | 2007 | printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]); |
1da177e4 | 2008 | if (badspeed) |
44bafdf3 JS |
2009 | printk |
2010 | (" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n", | |
2011 | rcor >> 5, rbpr); | |
2012 | } /* serial_console_init */ | |
1da177e4 | 2013 | |
b68e31d0 | 2014 | static const struct tty_operations cy_ops = { |
1da177e4 LT |
2015 | .open = cy_open, |
2016 | .close = cy_close, | |
2017 | .write = cy_write, | |
2018 | .put_char = cy_put_char, | |
2019 | .flush_chars = cy_flush_chars, | |
2020 | .write_room = cy_write_room, | |
2021 | .chars_in_buffer = cy_chars_in_buffer, | |
2022 | .flush_buffer = cy_flush_buffer, | |
2023 | .ioctl = cy_ioctl, | |
2024 | .throttle = cy_throttle, | |
2025 | .unthrottle = cy_unthrottle, | |
2026 | .set_termios = cy_set_termios, | |
2027 | .stop = cy_stop, | |
2028 | .start = cy_start, | |
2029 | .hangup = cy_hangup, | |
2030 | .tiocmget = cy_tiocmget, | |
2031 | .tiocmset = cy_tiocmset, | |
2032 | }; | |
44bafdf3 | 2033 | |
1da177e4 LT |
2034 | /* The serial driver boot-time initialization code! |
2035 | Hardware I/O ports are mapped to character special devices on a | |
2036 | first found, first allocated manner. That is, this code searches | |
2037 | for Cyclom cards in the system. As each is found, it is probed | |
2038 | to discover how many chips (and thus how many ports) are present. | |
2039 | These ports are mapped to the tty ports 64 and upward in monotonic | |
2040 | fashion. If an 8-port card is replaced with a 16-port card, the | |
2041 | port mapping on a following card will shift. | |
2042 | ||
2043 | This approach is different from what is used in the other serial | |
2044 | device driver because the Cyclom is more properly a multiplexer, | |
2045 | not just an aggregation of serial ports on one card. | |
2046 | ||
2047 | If there are more cards with more ports than have been statically | |
2048 | allocated above, a warning is printed and the extra ports are ignored. | |
2049 | */ | |
44bafdf3 | 2050 | static int __init serial167_init(void) |
1da177e4 | 2051 | { |
44bafdf3 JS |
2052 | struct cyclades_port *info; |
2053 | int ret = 0; | |
2054 | int good_ports = 0; | |
2055 | int port_num = 0; | |
2056 | int index; | |
2057 | int DefSpeed; | |
1da177e4 | 2058 | #ifdef notyet |
44bafdf3 | 2059 | struct sigaction sa; |
1da177e4 LT |
2060 | #endif |
2061 | ||
44bafdf3 JS |
2062 | if (!(mvme16x_config & MVME16x_CONFIG_GOT_CD2401)) |
2063 | return 0; | |
1da177e4 | 2064 | |
44bafdf3 JS |
2065 | cy_serial_driver = alloc_tty_driver(NR_PORTS); |
2066 | if (!cy_serial_driver) | |
2067 | return -ENOMEM; | |
1da177e4 LT |
2068 | |
2069 | #if 0 | |
44bafdf3 | 2070 | scrn[1] = '\0'; |
1da177e4 LT |
2071 | #endif |
2072 | ||
44bafdf3 | 2073 | show_version(); |
1da177e4 | 2074 | |
44bafdf3 JS |
2075 | /* Has "console=0,9600n8" been used in bootinfo to change speed? */ |
2076 | if (serial_console_cflag) | |
2077 | DefSpeed = serial_console_cflag & 0017; | |
2078 | else { | |
2079 | DefSpeed = initial_console_speed; | |
2080 | serial_console_info = &cy_port[0]; | |
2081 | serial_console_cflag = DefSpeed | CS8; | |
1da177e4 | 2082 | #if 0 |
44bafdf3 JS |
2083 | serial_console = 64; /*callout_driver.minor_start */ |
2084 | #endif | |
2085 | } | |
1da177e4 | 2086 | |
44bafdf3 | 2087 | /* Initialize the tty_driver structure */ |
1da177e4 | 2088 | |
44bafdf3 JS |
2089 | cy_serial_driver->owner = THIS_MODULE; |
2090 | cy_serial_driver->name = "ttyS"; | |
2091 | cy_serial_driver->major = TTY_MAJOR; | |
2092 | cy_serial_driver->minor_start = 64; | |
2093 | cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2094 | cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
2095 | cy_serial_driver->init_termios = tty_std_termios; | |
2096 | cy_serial_driver->init_termios.c_cflag = | |
2097 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2098 | cy_serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
2099 | tty_set_operations(cy_serial_driver, &cy_ops); | |
2100 | ||
2101 | ret = tty_register_driver(cy_serial_driver); | |
2102 | if (ret) { | |
2103 | printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n"); | |
2104 | put_tty_driver(cy_serial_driver); | |
2105 | return ret; | |
2106 | } | |
1da177e4 | 2107 | |
44bafdf3 JS |
2108 | port_num = 0; |
2109 | info = cy_port; | |
2110 | for (index = 0; index < 1; index++) { | |
1da177e4 | 2111 | |
44bafdf3 JS |
2112 | good_ports = 4; |
2113 | ||
2114 | if (port_num < NR_PORTS) { | |
2115 | while (good_ports-- && port_num < NR_PORTS) { | |
1da177e4 | 2116 | /*** initialize port ***/ |
44bafdf3 JS |
2117 | info->magic = CYCLADES_MAGIC; |
2118 | info->type = PORT_CIRRUS; | |
2119 | info->card = index; | |
2120 | info->line = port_num; | |
2121 | info->flags = STD_COM_FLAGS; | |
2122 | info->tty = NULL; | |
2123 | info->xmit_fifo_size = 12; | |
2124 | info->cor1 = CyPARITY_NONE | Cy_8_BITS; | |
2125 | info->cor2 = CyETC; | |
2126 | info->cor3 = Cy_1_STOP; | |
2127 | info->cor4 = 0x08; /* _very_ small receive threshold */ | |
2128 | info->cor5 = 0; | |
2129 | info->cor6 = 0; | |
2130 | info->cor7 = 0; | |
2131 | info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */ | |
2132 | info->tco = baud_co[DefSpeed]; /* Tx CO */ | |
2133 | info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */ | |
2134 | info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */ | |
2135 | info->close_delay = 0; | |
2136 | info->x_char = 0; | |
44bafdf3 | 2137 | info->count = 0; |
1da177e4 | 2138 | #ifdef SERIAL_DEBUG_COUNT |
44bafdf3 JS |
2139 | printk("cyc: %d: setting count to 0\n", |
2140 | __LINE__); | |
2141 | #endif | |
2142 | info->blocked_open = 0; | |
2143 | info->default_threshold = 0; | |
2144 | info->default_timeout = 0; | |
44bafdf3 JS |
2145 | init_waitqueue_head(&info->open_wait); |
2146 | init_waitqueue_head(&info->close_wait); | |
2147 | /* info->session */ | |
2148 | /* info->pgrp */ | |
1da177e4 | 2149 | /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/ |
44bafdf3 JS |
2150 | info->read_status_mask = |
2151 | CyTIMEOUT | CySPECHAR | CyBREAK | CyPARITY | | |
2152 | CyFRAME | CyOVERRUN; | |
2153 | /* info->timeout */ | |
2154 | ||
2155 | printk("ttyS%d ", info->line); | |
2156 | port_num++; | |
2157 | info++; | |
2158 | if (!(port_num & 7)) { | |
2159 | printk("\n "); | |
2160 | } | |
2161 | } | |
1da177e4 | 2162 | } |
44bafdf3 JS |
2163 | printk("\n"); |
2164 | } | |
2165 | while (port_num < NR_PORTS) { | |
2166 | info->line = -1; | |
2167 | port_num++; | |
2168 | info++; | |
2169 | } | |
0dbb5671 | 2170 | |
44bafdf3 JS |
2171 | ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0, |
2172 | "cd2401_errors", cd2401_rxerr_interrupt); | |
2173 | if (ret) { | |
2174 | printk(KERN_ERR "Could't get cd2401_errors IRQ"); | |
2175 | goto cleanup_serial_driver; | |
2176 | } | |
2177 | ||
2178 | ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0, | |
2179 | "cd2401_modem", cd2401_modem_interrupt); | |
2180 | if (ret) { | |
2181 | printk(KERN_ERR "Could't get cd2401_modem IRQ"); | |
2182 | goto cleanup_irq_cd2401_errors; | |
2183 | } | |
2184 | ||
2185 | ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0, | |
2186 | "cd2401_txints", cd2401_tx_interrupt); | |
2187 | if (ret) { | |
2188 | printk(KERN_ERR "Could't get cd2401_txints IRQ"); | |
2189 | goto cleanup_irq_cd2401_modem; | |
2190 | } | |
2191 | ||
2192 | ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0, | |
2193 | "cd2401_rxints", cd2401_rx_interrupt); | |
2194 | if (ret) { | |
2195 | printk(KERN_ERR "Could't get cd2401_rxints IRQ"); | |
2196 | goto cleanup_irq_cd2401_txints; | |
2197 | } | |
2198 | ||
2199 | /* Now we have registered the interrupt handlers, allow the interrupts */ | |
2200 | ||
2201 | pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */ | |
2202 | pcc2chip[PccSCCTICR] = 0x15; | |
2203 | pcc2chip[PccSCCRICR] = 0x15; | |
2204 | ||
2205 | pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */ | |
2206 | ||
2207 | return 0; | |
1da177e4 | 2208 | cleanup_irq_cd2401_txints: |
44bafdf3 | 2209 | free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt); |
1da177e4 | 2210 | cleanup_irq_cd2401_modem: |
44bafdf3 | 2211 | free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt); |
1da177e4 | 2212 | cleanup_irq_cd2401_errors: |
44bafdf3 | 2213 | free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt); |
1da177e4 | 2214 | cleanup_serial_driver: |
44bafdf3 JS |
2215 | if (tty_unregister_driver(cy_serial_driver)) |
2216 | printk(KERN_ERR | |
2217 | "Couldn't unregister MVME166/7 serial driver\n"); | |
2218 | put_tty_driver(cy_serial_driver); | |
2219 | return ret; | |
2220 | } /* serial167_init */ | |
1da177e4 LT |
2221 | |
2222 | module_init(serial167_init); | |
2223 | ||
1da177e4 | 2224 | #ifdef CYCLOM_SHOW_STATUS |
44bafdf3 | 2225 | static void show_status(int line_num) |
1da177e4 | 2226 | { |
44bafdf3 JS |
2227 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; |
2228 | int channel; | |
2229 | struct cyclades_port *info; | |
2230 | unsigned long flags; | |
2231 | ||
2232 | info = &cy_port[line_num]; | |
2233 | channel = info->line; | |
2234 | printk(" channel %d\n", channel); | |
2235 | /**/ printk(" cy_port\n"); | |
2236 | printk(" card line flags = %d %d %x\n", | |
2237 | info->card, info->line, info->flags); | |
2238 | printk | |
2239 | (" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n", | |
2240 | (long)info->tty, info->read_status_mask, info->timeout, | |
2241 | info->xmit_fifo_size); | |
2242 | printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n", | |
2243 | info->cor1, info->cor2, info->cor3, info->cor4, info->cor5, | |
2244 | info->cor6, info->cor7); | |
2245 | printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", info->tbpr, info->tco, | |
2246 | info->rbpr, info->rco); | |
2247 | printk(" close_delay event count = %d %d %d\n", info->close_delay, | |
2248 | info->event, info->count); | |
2249 | printk(" x_char blocked_open = %x %x\n", info->x_char, | |
2250 | info->blocked_open); | |
2251 | printk(" open_wait = %lx %lx %lx\n", (long)info->open_wait); | |
2252 | ||
2253 | local_irq_save(flags); | |
1da177e4 LT |
2254 | |
2255 | /* Global Registers */ | |
2256 | ||
2257 | printk(" CyGFRCR %x\n", base_addr[CyGFRCR]); | |
2258 | printk(" CyCAR %x\n", base_addr[CyCAR]); | |
2259 | printk(" CyRISR %x\n", base_addr[CyRISR]); | |
2260 | printk(" CyTISR %x\n", base_addr[CyTISR]); | |
2261 | printk(" CyMISR %x\n", base_addr[CyMISR]); | |
2262 | printk(" CyRIR %x\n", base_addr[CyRIR]); | |
2263 | printk(" CyTIR %x\n", base_addr[CyTIR]); | |
2264 | printk(" CyMIR %x\n", base_addr[CyMIR]); | |
2265 | printk(" CyTPR %x\n", base_addr[CyTPR]); | |
2266 | ||
44bafdf3 | 2267 | base_addr[CyCAR] = (u_char) channel; |
1da177e4 LT |
2268 | |
2269 | /* Virtual Registers */ | |
2270 | ||
2271 | #if 0 | |
2272 | printk(" CyRIVR %x\n", base_addr[CyRIVR]); | |
2273 | printk(" CyTIVR %x\n", base_addr[CyTIVR]); | |
2274 | printk(" CyMIVR %x\n", base_addr[CyMIVR]); | |
2275 | printk(" CyMISR %x\n", base_addr[CyMISR]); | |
2276 | #endif | |
2277 | ||
2278 | /* Channel Registers */ | |
2279 | ||
2280 | printk(" CyCCR %x\n", base_addr[CyCCR]); | |
2281 | printk(" CyIER %x\n", base_addr[CyIER]); | |
2282 | printk(" CyCOR1 %x\n", base_addr[CyCOR1]); | |
2283 | printk(" CyCOR2 %x\n", base_addr[CyCOR2]); | |
2284 | printk(" CyCOR3 %x\n", base_addr[CyCOR3]); | |
2285 | printk(" CyCOR4 %x\n", base_addr[CyCOR4]); | |
2286 | printk(" CyCOR5 %x\n", base_addr[CyCOR5]); | |
2287 | #if 0 | |
2288 | printk(" CyCCSR %x\n", base_addr[CyCCSR]); | |
2289 | printk(" CyRDCR %x\n", base_addr[CyRDCR]); | |
2290 | #endif | |
2291 | printk(" CySCHR1 %x\n", base_addr[CySCHR1]); | |
2292 | printk(" CySCHR2 %x\n", base_addr[CySCHR2]); | |
2293 | #if 0 | |
2294 | printk(" CySCHR3 %x\n", base_addr[CySCHR3]); | |
2295 | printk(" CySCHR4 %x\n", base_addr[CySCHR4]); | |
2296 | printk(" CySCRL %x\n", base_addr[CySCRL]); | |
2297 | printk(" CySCRH %x\n", base_addr[CySCRH]); | |
2298 | printk(" CyLNC %x\n", base_addr[CyLNC]); | |
2299 | printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]); | |
2300 | printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]); | |
2301 | #endif | |
2302 | printk(" CyRTPRL %x\n", base_addr[CyRTPRL]); | |
2303 | printk(" CyRTPRH %x\n", base_addr[CyRTPRH]); | |
2304 | printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]); | |
2305 | printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]); | |
2306 | printk(" CyRBPR %x\n", base_addr[CyRBPR]); | |
2307 | printk(" CyRCOR %x\n", base_addr[CyRCOR]); | |
2308 | printk(" CyTBPR %x\n", base_addr[CyTBPR]); | |
2309 | printk(" CyTCOR %x\n", base_addr[CyTCOR]); | |
2310 | ||
44bafdf3 JS |
2311 | local_irq_restore(flags); |
2312 | } /* show_status */ | |
1da177e4 LT |
2313 | #endif |
2314 | ||
1da177e4 LT |
2315 | #if 0 |
2316 | /* Dummy routine in mvme16x/config.c for now */ | |
2317 | ||
2318 | /* Serial console setup. Called from linux/init/main.c */ | |
2319 | ||
2320 | void console_setup(char *str, int *ints) | |
2321 | { | |
2322 | char *s; | |
2323 | int baud, bits, parity; | |
2324 | int cflag = 0; | |
2325 | ||
2326 | /* Sanity check. */ | |
44bafdf3 JS |
2327 | if (ints[0] > 3 || ints[1] > 3) |
2328 | return; | |
1da177e4 LT |
2329 | |
2330 | /* Get baud, bits and parity */ | |
2331 | baud = 2400; | |
2332 | bits = 8; | |
2333 | parity = 'n'; | |
44bafdf3 JS |
2334 | if (ints[2]) |
2335 | baud = ints[2]; | |
1da177e4 LT |
2336 | if ((s = strchr(str, ','))) { |
2337 | do { | |
2338 | s++; | |
44bafdf3 JS |
2339 | } while (*s >= '0' && *s <= '9'); |
2340 | if (*s) | |
2341 | parity = *s++; | |
2342 | if (*s) | |
2343 | bits = *s - '0'; | |
1da177e4 LT |
2344 | } |
2345 | ||
2346 | /* Now construct a cflag setting. */ | |
44bafdf3 JS |
2347 | switch (baud) { |
2348 | case 1200: | |
2349 | cflag |= B1200; | |
2350 | break; | |
2351 | case 9600: | |
2352 | cflag |= B9600; | |
2353 | break; | |
2354 | case 19200: | |
2355 | cflag |= B19200; | |
2356 | break; | |
2357 | case 38400: | |
2358 | cflag |= B38400; | |
2359 | break; | |
2360 | case 2400: | |
2361 | default: | |
2362 | cflag |= B2400; | |
2363 | break; | |
1da177e4 | 2364 | } |
44bafdf3 JS |
2365 | switch (bits) { |
2366 | case 7: | |
2367 | cflag |= CS7; | |
2368 | break; | |
2369 | default: | |
2370 | case 8: | |
2371 | cflag |= CS8; | |
2372 | break; | |
1da177e4 | 2373 | } |
44bafdf3 JS |
2374 | switch (parity) { |
2375 | case 'o': | |
2376 | case 'O': | |
2377 | cflag |= PARODD; | |
2378 | break; | |
2379 | case 'e': | |
2380 | case 'E': | |
2381 | cflag |= PARENB; | |
2382 | break; | |
1da177e4 LT |
2383 | } |
2384 | ||
2385 | serial_console_info = &cy_port[ints[1]]; | |
2386 | serial_console_cflag = cflag; | |
44bafdf3 | 2387 | serial_console = ints[1] + 64; /*callout_driver.minor_start */ |
1da177e4 LT |
2388 | } |
2389 | #endif | |
2390 | ||
2391 | /* | |
2392 | * The following is probably out of date for 2.1.x serial console stuff. | |
2393 | * | |
2394 | * The console is registered early on from arch/m68k/kernel/setup.c, and | |
2395 | * it therefore relies on the chip being setup correctly by 166-Bug. This | |
2396 | * seems reasonable, as the serial port has been used to invoke the system | |
2397 | * boot. It also means that this function must not rely on any data | |
2398 | * initialisation performed by serial167_init() etc. | |
2399 | * | |
2400 | * Of course, once the console has been registered, we had better ensure | |
2401 | * that serial167_init() doesn't leave the chip non-functional. | |
2402 | * | |
2403 | * The console must be locked when we get here. | |
2404 | */ | |
2405 | ||
44bafdf3 JS |
2406 | void serial167_console_write(struct console *co, const char *str, |
2407 | unsigned count) | |
1da177e4 | 2408 | { |
44bafdf3 | 2409 | volatile unsigned char *base_addr = (u_char *) BASE_ADDR; |
1da177e4 LT |
2410 | unsigned long flags; |
2411 | volatile u_char sink; | |
2412 | u_char ier; | |
2413 | int port; | |
2414 | u_char do_lf = 0; | |
2415 | int i = 0; | |
2416 | ||
2417 | local_irq_save(flags); | |
2418 | ||
2419 | /* Ensure transmitter is enabled! */ | |
2420 | ||
2421 | port = 0; | |
44bafdf3 | 2422 | base_addr[CyCAR] = (u_char) port; |
1da177e4 LT |
2423 | while (base_addr[CyCCR]) |
2424 | ; | |
2425 | base_addr[CyCCR] = CyENB_XMTR; | |
2426 | ||
2427 | ier = base_addr[CyIER]; | |
2428 | base_addr[CyIER] = CyTxMpty; | |
2429 | ||
2430 | while (1) { | |
44bafdf3 | 2431 | if (pcc2chip[PccSCCTICR] & 0x20) { |
1da177e4 LT |
2432 | /* We have a Tx int. Acknowledge it */ |
2433 | sink = pcc2chip[PccTPIACKR]; | |
2434 | if ((base_addr[CyLICR] >> 2) == port) { | |
2435 | if (i == count) { | |
2436 | /* Last char of string is now output */ | |
2437 | base_addr[CyTEOIR] = CyNOTRANS; | |
2438 | break; | |
2439 | } | |
2440 | if (do_lf) { | |
2441 | base_addr[CyTDR] = '\n'; | |
2442 | str++; | |
2443 | i++; | |
2444 | do_lf = 0; | |
44bafdf3 | 2445 | } else if (*str == '\n') { |
1da177e4 LT |
2446 | base_addr[CyTDR] = '\r'; |
2447 | do_lf = 1; | |
44bafdf3 | 2448 | } else { |
1da177e4 LT |
2449 | base_addr[CyTDR] = *str++; |
2450 | i++; | |
2451 | } | |
2452 | base_addr[CyTEOIR] = 0; | |
44bafdf3 | 2453 | } else |
1da177e4 LT |
2454 | base_addr[CyTEOIR] = CyNOTRANS; |
2455 | } | |
2456 | } | |
2457 | ||
2458 | base_addr[CyIER] = ier; | |
2459 | ||
2460 | local_irq_restore(flags); | |
2461 | } | |
2462 | ||
44bafdf3 JS |
2463 | static struct tty_driver *serial167_console_device(struct console *c, |
2464 | int *index) | |
1da177e4 LT |
2465 | { |
2466 | *index = c->index; | |
2467 | return cy_serial_driver; | |
2468 | } | |
2469 | ||
1da177e4 | 2470 | static struct console sercons = { |
44bafdf3 JS |
2471 | .name = "ttyS", |
2472 | .write = serial167_console_write, | |
2473 | .device = serial167_console_device, | |
44bafdf3 JS |
2474 | .flags = CON_PRINTBUFFER, |
2475 | .index = -1, | |
1da177e4 LT |
2476 | }; |
2477 | ||
1da177e4 LT |
2478 | static int __init serial167_console_init(void) |
2479 | { | |
2480 | if (vme_brdtype == VME_TYPE_MVME166 || | |
44bafdf3 JS |
2481 | vme_brdtype == VME_TYPE_MVME167 || |
2482 | vme_brdtype == VME_TYPE_MVME177) { | |
1da177e4 LT |
2483 | mvme167_serial_console_setup(0); |
2484 | register_console(&sercons); | |
2485 | } | |
2486 | return 0; | |
2487 | } | |
44bafdf3 | 2488 | |
1da177e4 LT |
2489 | console_initcall(serial167_console_init); |
2490 | ||
1da177e4 | 2491 | MODULE_LICENSE("GPL"); |