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1da177e4 LT |
1 | /* |
2 | * Device driver for the via-cuda on Apple Powermacs. | |
3 | * | |
4 | * The VIA (versatile interface adapter) interfaces to the CUDA, | |
5 | * a 6805 microprocessor core which controls the ADB (Apple Desktop | |
6 | * Bus) which connects to the keyboard and mouse. The CUDA also | |
7 | * controls system power and the RTC (real time clock) chip. | |
8 | * | |
9 | * Copyright (C) 1996 Paul Mackerras. | |
10 | */ | |
11 | #include <stdarg.h> | |
1da177e4 LT |
12 | #include <linux/types.h> |
13 | #include <linux/errno.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/sched.h> | |
17 | #include <linux/adb.h> | |
18 | #include <linux/cuda.h> | |
19 | #include <linux/spinlock.h> | |
20 | #include <linux/interrupt.h> | |
21 | #ifdef CONFIG_PPC | |
22 | #include <asm/prom.h> | |
23 | #include <asm/machdep.h> | |
24 | #else | |
25 | #include <asm/macintosh.h> | |
26 | #include <asm/macints.h> | |
27 | #include <asm/machw.h> | |
28 | #include <asm/mac_via.h> | |
29 | #endif | |
30 | #include <asm/io.h> | |
31 | #include <asm/system.h> | |
32 | #include <linux/init.h> | |
33 | ||
34 | static volatile unsigned char __iomem *via; | |
35 | static DEFINE_SPINLOCK(cuda_lock); | |
36 | ||
1da177e4 LT |
37 | /* VIA registers - spaced 0x200 bytes apart */ |
38 | #define RS 0x200 /* skip between registers */ | |
39 | #define B 0 /* B-side data */ | |
40 | #define A RS /* A-side data */ | |
41 | #define DIRB (2*RS) /* B-side direction (1=output) */ | |
42 | #define DIRA (3*RS) /* A-side direction (1=output) */ | |
43 | #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */ | |
44 | #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */ | |
45 | #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */ | |
46 | #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */ | |
47 | #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */ | |
48 | #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */ | |
49 | #define SR (10*RS) /* Shift register */ | |
50 | #define ACR (11*RS) /* Auxiliary control register */ | |
51 | #define PCR (12*RS) /* Peripheral control register */ | |
52 | #define IFR (13*RS) /* Interrupt flag register */ | |
53 | #define IER (14*RS) /* Interrupt enable register */ | |
54 | #define ANH (15*RS) /* A-side data, no handshake */ | |
55 | ||
56 | /* Bits in B data register: all active low */ | |
57 | #define TREQ 0x08 /* Transfer request (input) */ | |
58 | #define TACK 0x10 /* Transfer acknowledge (output) */ | |
59 | #define TIP 0x20 /* Transfer in progress (output) */ | |
60 | ||
61 | /* Bits in ACR */ | |
62 | #define SR_CTRL 0x1c /* Shift register control bits */ | |
63 | #define SR_EXT 0x0c /* Shift on external clock */ | |
64 | #define SR_OUT 0x10 /* Shift out if 1 */ | |
65 | ||
66 | /* Bits in IFR and IER */ | |
67 | #define IER_SET 0x80 /* set bits in IER */ | |
68 | #define IER_CLR 0 /* clear bits in IER */ | |
69 | #define SR_INT 0x04 /* Shift register full/empty */ | |
70 | ||
71 | static enum cuda_state { | |
72 | idle, | |
73 | sent_first_byte, | |
74 | sending, | |
75 | reading, | |
76 | read_done, | |
77 | awaiting_reply | |
78 | } cuda_state; | |
79 | ||
80 | static struct adb_request *current_req; | |
81 | static struct adb_request *last_req; | |
82 | static unsigned char cuda_rbuf[16]; | |
83 | static unsigned char *reply_ptr; | |
84 | static int reading_reply; | |
85 | static int data_index; | |
86 | #ifdef CONFIG_PPC | |
87 | static struct device_node *vias; | |
88 | #endif | |
89 | static int cuda_fully_inited = 0; | |
90 | ||
91 | #ifdef CONFIG_ADB | |
92 | static int cuda_probe(void); | |
93 | static int cuda_init(void); | |
94 | static int cuda_send_request(struct adb_request *req, int sync); | |
95 | static int cuda_adb_autopoll(int devs); | |
96 | static int cuda_reset_adb_bus(void); | |
97 | #endif /* CONFIG_ADB */ | |
98 | ||
99 | static int cuda_init_via(void); | |
100 | static void cuda_start(void); | |
101 | static irqreturn_t cuda_interrupt(int irq, void *arg, struct pt_regs *regs); | |
102 | static void cuda_input(unsigned char *buf, int nb, struct pt_regs *regs); | |
103 | void cuda_poll(void); | |
104 | static int cuda_write(struct adb_request *req); | |
105 | ||
106 | int cuda_request(struct adb_request *req, | |
107 | void (*done)(struct adb_request *), int nbytes, ...); | |
108 | ||
109 | #ifdef CONFIG_ADB | |
110 | struct adb_driver via_cuda_driver = { | |
111 | "CUDA", | |
112 | cuda_probe, | |
113 | cuda_init, | |
114 | cuda_send_request, | |
115 | cuda_adb_autopoll, | |
116 | cuda_poll, | |
117 | cuda_reset_adb_bus | |
118 | }; | |
119 | #endif /* CONFIG_ADB */ | |
120 | ||
121 | #ifdef CONFIG_PPC | |
51d3082f | 122 | int __init find_via_cuda(void) |
1da177e4 | 123 | { |
1da177e4 | 124 | struct adb_request req; |
51d3082f | 125 | phys_addr_t taddr; |
018a3d1d | 126 | const u32 *reg; |
51d3082f | 127 | int err; |
1da177e4 LT |
128 | |
129 | if (vias != 0) | |
130 | return 1; | |
51d3082f | 131 | vias = of_find_node_by_name(NULL, "via-cuda"); |
1da177e4 LT |
132 | if (vias == 0) |
133 | return 0; | |
1da177e4 | 134 | |
018a3d1d | 135 | reg = get_property(vias, "reg", NULL); |
51d3082f BH |
136 | if (reg == NULL) { |
137 | printk(KERN_ERR "via-cuda: No \"reg\" property !\n"); | |
138 | goto fail; | |
139 | } | |
140 | taddr = of_translate_address(vias, reg); | |
141 | if (taddr == 0) { | |
142 | printk(KERN_ERR "via-cuda: Can't translate address !\n"); | |
143 | goto fail; | |
144 | } | |
145 | via = ioremap(taddr, 0x2000); | |
146 | if (via == NULL) { | |
147 | printk(KERN_ERR "via-cuda: Can't map address !\n"); | |
148 | goto fail; | |
1da177e4 | 149 | } |
1da177e4 LT |
150 | |
151 | cuda_state = idle; | |
152 | sys_ctrler = SYS_CTRLER_CUDA; | |
153 | ||
154 | err = cuda_init_via(); | |
155 | if (err) { | |
156 | printk(KERN_ERR "cuda_init_via() failed\n"); | |
157 | via = NULL; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | /* Clear and enable interrupts, but only on PPC. On 68K it's done */ | |
162 | /* for us by the main VIA driver in arch/m68k/mac/via.c */ | |
163 | ||
164 | #ifndef CONFIG_MAC | |
165 | out_8(&via[IFR], 0x7f); /* clear interrupts by writing 1s */ | |
166 | out_8(&via[IER], IER_SET|SR_INT); /* enable interrupt from SR */ | |
167 | #endif | |
168 | ||
169 | /* enable autopoll */ | |
170 | cuda_request(&req, NULL, 3, CUDA_PACKET, CUDA_AUTOPOLL, 1); | |
171 | while (!req.complete) | |
172 | cuda_poll(); | |
173 | ||
174 | return 1; | |
51d3082f BH |
175 | |
176 | fail: | |
177 | of_node_put(vias); | |
178 | vias = NULL; | |
179 | return 0; | |
1da177e4 LT |
180 | } |
181 | #endif /* CONFIG_PPC */ | |
182 | ||
183 | static int __init via_cuda_start(void) | |
184 | { | |
0ebfff14 BH |
185 | unsigned int irq; |
186 | ||
1da177e4 LT |
187 | if (via == NULL) |
188 | return -ENODEV; | |
189 | ||
0ebfff14 BH |
190 | #ifdef CONFIG_MAC |
191 | irq = IRQ_MAC_ADB; | |
192 | #else /* CONFIG_MAC */ | |
193 | irq = irq_of_parse_and_map(vias, 0); | |
194 | if (irq == NO_IRQ) { | |
195 | printk(KERN_ERR "via-cuda: can't map interrupts for %s\n", | |
196 | vias->full_name); | |
197 | return -ENODEV; | |
198 | } | |
199 | #endif /* CONFIG_MAP */ | |
200 | ||
201 | if (request_irq(irq, cuda_interrupt, 0, "ADB", cuda_interrupt)) { | |
202 | printk(KERN_ERR "via-cuda: can't request irq %d\n", irq); | |
1da177e4 LT |
203 | return -EAGAIN; |
204 | } | |
205 | ||
206 | printk("Macintosh CUDA driver v0.5 for Unified ADB.\n"); | |
207 | ||
208 | cuda_fully_inited = 1; | |
209 | return 0; | |
210 | } | |
211 | ||
212 | device_initcall(via_cuda_start); | |
213 | ||
214 | #ifdef CONFIG_ADB | |
215 | static int | |
216 | cuda_probe(void) | |
217 | { | |
218 | #ifdef CONFIG_PPC | |
219 | if (sys_ctrler != SYS_CTRLER_CUDA) | |
220 | return -ENODEV; | |
221 | #else | |
222 | if (macintosh_config->adb_type != MAC_ADB_CUDA) | |
223 | return -ENODEV; | |
224 | via = via1; | |
225 | #endif | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int __init | |
230 | cuda_init(void) | |
231 | { | |
232 | #ifdef CONFIG_PPC | |
233 | if (via == NULL) | |
234 | return -ENODEV; | |
235 | return 0; | |
236 | #else | |
237 | int err = cuda_init_via(); | |
238 | if (err) { | |
239 | printk(KERN_ERR "cuda_init_via() failed\n"); | |
240 | return -ENODEV; | |
241 | } | |
242 | ||
243 | return via_cuda_start(); | |
244 | #endif | |
245 | } | |
246 | #endif /* CONFIG_ADB */ | |
247 | ||
248 | #define WAIT_FOR(cond, what) \ | |
249 | do { \ | |
250 | int x; \ | |
251 | for (x = 1000; !(cond); --x) { \ | |
252 | if (x == 0) { \ | |
253 | printk("Timeout waiting for " what "\n"); \ | |
254 | return -ENXIO; \ | |
255 | } \ | |
256 | udelay(100); \ | |
257 | } \ | |
258 | } while (0) | |
259 | ||
260 | static int | |
261 | cuda_init_via(void) | |
262 | { | |
263 | out_8(&via[DIRB], (in_8(&via[DIRB]) | TACK | TIP) & ~TREQ); /* TACK & TIP out */ | |
264 | out_8(&via[B], in_8(&via[B]) | TACK | TIP); /* negate them */ | |
265 | out_8(&via[ACR] ,(in_8(&via[ACR]) & ~SR_CTRL) | SR_EXT); /* SR data in */ | |
266 | (void)in_8(&via[SR]); /* clear any left-over data */ | |
267 | #ifndef CONFIG_MAC | |
268 | out_8(&via[IER], 0x7f); /* disable interrupts from VIA */ | |
269 | (void)in_8(&via[IER]); | |
270 | #endif | |
271 | ||
272 | /* delay 4ms and then clear any pending interrupt */ | |
273 | mdelay(4); | |
274 | (void)in_8(&via[SR]); | |
275 | out_8(&via[IFR], in_8(&via[IFR]) & 0x7f); | |
276 | ||
277 | /* sync with the CUDA - assert TACK without TIP */ | |
278 | out_8(&via[B], in_8(&via[B]) & ~TACK); | |
279 | ||
280 | /* wait for the CUDA to assert TREQ in response */ | |
281 | WAIT_FOR((in_8(&via[B]) & TREQ) == 0, "CUDA response to sync"); | |
282 | ||
283 | /* wait for the interrupt and then clear it */ | |
284 | WAIT_FOR(in_8(&via[IFR]) & SR_INT, "CUDA response to sync (2)"); | |
285 | (void)in_8(&via[SR]); | |
286 | out_8(&via[IFR], in_8(&via[IFR]) & 0x7f); | |
287 | ||
288 | /* finish the sync by negating TACK */ | |
289 | out_8(&via[B], in_8(&via[B]) | TACK); | |
290 | ||
291 | /* wait for the CUDA to negate TREQ and the corresponding interrupt */ | |
292 | WAIT_FOR(in_8(&via[B]) & TREQ, "CUDA response to sync (3)"); | |
293 | WAIT_FOR(in_8(&via[IFR]) & SR_INT, "CUDA response to sync (4)"); | |
294 | (void)in_8(&via[SR]); | |
295 | out_8(&via[IFR], in_8(&via[IFR]) & 0x7f); | |
296 | out_8(&via[B], in_8(&via[B]) | TIP); /* should be unnecessary */ | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | #ifdef CONFIG_ADB | |
302 | /* Send an ADB command */ | |
303 | static int | |
304 | cuda_send_request(struct adb_request *req, int sync) | |
305 | { | |
306 | int i; | |
307 | ||
308 | if ((via == NULL) || !cuda_fully_inited) { | |
309 | req->complete = 1; | |
310 | return -ENXIO; | |
311 | } | |
312 | ||
313 | req->reply_expected = 1; | |
314 | ||
315 | i = cuda_write(req); | |
316 | if (i) | |
317 | return i; | |
318 | ||
319 | if (sync) { | |
320 | while (!req->complete) | |
321 | cuda_poll(); | |
322 | } | |
323 | return 0; | |
324 | } | |
325 | ||
326 | ||
327 | /* Enable/disable autopolling */ | |
328 | static int | |
329 | cuda_adb_autopoll(int devs) | |
330 | { | |
331 | struct adb_request req; | |
332 | ||
333 | if ((via == NULL) || !cuda_fully_inited) | |
334 | return -ENXIO; | |
335 | ||
336 | cuda_request(&req, NULL, 3, CUDA_PACKET, CUDA_AUTOPOLL, (devs? 1: 0)); | |
337 | while (!req.complete) | |
338 | cuda_poll(); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | /* Reset adb bus - how do we do this?? */ | |
343 | static int | |
344 | cuda_reset_adb_bus(void) | |
345 | { | |
346 | struct adb_request req; | |
347 | ||
348 | if ((via == NULL) || !cuda_fully_inited) | |
349 | return -ENXIO; | |
350 | ||
351 | cuda_request(&req, NULL, 2, ADB_PACKET, 0); /* maybe? */ | |
352 | while (!req.complete) | |
353 | cuda_poll(); | |
354 | return 0; | |
355 | } | |
356 | #endif /* CONFIG_ADB */ | |
357 | /* Construct and send a cuda request */ | |
358 | int | |
359 | cuda_request(struct adb_request *req, void (*done)(struct adb_request *), | |
360 | int nbytes, ...) | |
361 | { | |
362 | va_list list; | |
363 | int i; | |
364 | ||
365 | if (via == NULL) { | |
366 | req->complete = 1; | |
367 | return -ENXIO; | |
368 | } | |
369 | ||
370 | req->nbytes = nbytes; | |
371 | req->done = done; | |
372 | va_start(list, nbytes); | |
373 | for (i = 0; i < nbytes; ++i) | |
374 | req->data[i] = va_arg(list, int); | |
375 | va_end(list); | |
376 | req->reply_expected = 1; | |
377 | return cuda_write(req); | |
378 | } | |
379 | ||
380 | static int | |
381 | cuda_write(struct adb_request *req) | |
382 | { | |
383 | unsigned long flags; | |
384 | ||
385 | if (req->nbytes < 2 || req->data[0] > CUDA_PACKET) { | |
386 | req->complete = 1; | |
387 | return -EINVAL; | |
388 | } | |
389 | req->next = NULL; | |
390 | req->sent = 0; | |
391 | req->complete = 0; | |
392 | req->reply_len = 0; | |
393 | ||
394 | spin_lock_irqsave(&cuda_lock, flags); | |
395 | if (current_req != 0) { | |
396 | last_req->next = req; | |
397 | last_req = req; | |
398 | } else { | |
399 | current_req = req; | |
400 | last_req = req; | |
401 | if (cuda_state == idle) | |
402 | cuda_start(); | |
403 | } | |
404 | spin_unlock_irqrestore(&cuda_lock, flags); | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static void | |
410 | cuda_start(void) | |
411 | { | |
412 | struct adb_request *req; | |
413 | ||
414 | /* assert cuda_state == idle */ | |
415 | /* get the packet to send */ | |
416 | req = current_req; | |
417 | if (req == 0) | |
418 | return; | |
419 | if ((in_8(&via[B]) & TREQ) == 0) | |
420 | return; /* a byte is coming in from the CUDA */ | |
421 | ||
422 | /* set the shift register to shift out and send a byte */ | |
423 | out_8(&via[ACR], in_8(&via[ACR]) | SR_OUT); | |
424 | out_8(&via[SR], req->data[0]); | |
425 | out_8(&via[B], in_8(&via[B]) & ~TIP); | |
426 | cuda_state = sent_first_byte; | |
427 | } | |
428 | ||
429 | void | |
430 | cuda_poll(void) | |
431 | { | |
432 | unsigned long flags; | |
433 | ||
434 | /* cuda_interrupt only takes a normal lock, we disable | |
435 | * interrupts here to avoid re-entering and thus deadlocking. | |
436 | * An option would be to disable only the IRQ source with | |
437 | * disable_irq(), would that work on m68k ? --BenH | |
438 | */ | |
439 | local_irq_save(flags); | |
440 | cuda_interrupt(0, NULL, NULL); | |
441 | local_irq_restore(flags); | |
442 | } | |
443 | ||
444 | static irqreturn_t | |
445 | cuda_interrupt(int irq, void *arg, struct pt_regs *regs) | |
446 | { | |
447 | int status; | |
448 | struct adb_request *req = NULL; | |
449 | unsigned char ibuf[16]; | |
450 | int ibuf_len = 0; | |
451 | int complete = 0; | |
452 | unsigned char virq; | |
453 | ||
454 | spin_lock(&cuda_lock); | |
455 | ||
456 | virq = in_8(&via[IFR]) & 0x7f; | |
457 | out_8(&via[IFR], virq); | |
458 | if ((virq & SR_INT) == 0) { | |
459 | spin_unlock(&cuda_lock); | |
460 | return IRQ_NONE; | |
461 | } | |
462 | ||
463 | status = (~in_8(&via[B]) & (TIP|TREQ)) | (in_8(&via[ACR]) & SR_OUT); | |
464 | /* printk("cuda_interrupt: state=%d status=%x\n", cuda_state, status); */ | |
465 | switch (cuda_state) { | |
466 | case idle: | |
467 | /* CUDA has sent us the first byte of data - unsolicited */ | |
468 | if (status != TREQ) | |
469 | printk("cuda: state=idle, status=%x\n", status); | |
470 | (void)in_8(&via[SR]); | |
471 | out_8(&via[B], in_8(&via[B]) & ~TIP); | |
472 | cuda_state = reading; | |
473 | reply_ptr = cuda_rbuf; | |
474 | reading_reply = 0; | |
475 | break; | |
476 | ||
477 | case awaiting_reply: | |
478 | /* CUDA has sent us the first byte of data of a reply */ | |
479 | if (status != TREQ) | |
480 | printk("cuda: state=awaiting_reply, status=%x\n", status); | |
481 | (void)in_8(&via[SR]); | |
482 | out_8(&via[B], in_8(&via[B]) & ~TIP); | |
483 | cuda_state = reading; | |
484 | reply_ptr = current_req->reply; | |
485 | reading_reply = 1; | |
486 | break; | |
487 | ||
488 | case sent_first_byte: | |
489 | if (status == TREQ + TIP + SR_OUT) { | |
490 | /* collision */ | |
491 | out_8(&via[ACR], in_8(&via[ACR]) & ~SR_OUT); | |
492 | (void)in_8(&via[SR]); | |
493 | out_8(&via[B], in_8(&via[B]) | TIP | TACK); | |
494 | cuda_state = idle; | |
495 | } else { | |
496 | /* assert status == TIP + SR_OUT */ | |
497 | if (status != TIP + SR_OUT) | |
498 | printk("cuda: state=sent_first_byte status=%x\n", status); | |
499 | out_8(&via[SR], current_req->data[1]); | |
500 | out_8(&via[B], in_8(&via[B]) ^ TACK); | |
501 | data_index = 2; | |
502 | cuda_state = sending; | |
503 | } | |
504 | break; | |
505 | ||
506 | case sending: | |
507 | req = current_req; | |
508 | if (data_index >= req->nbytes) { | |
509 | out_8(&via[ACR], in_8(&via[ACR]) & ~SR_OUT); | |
510 | (void)in_8(&via[SR]); | |
511 | out_8(&via[B], in_8(&via[B]) | TACK | TIP); | |
512 | req->sent = 1; | |
513 | if (req->reply_expected) { | |
514 | cuda_state = awaiting_reply; | |
515 | } else { | |
516 | current_req = req->next; | |
517 | complete = 1; | |
518 | /* not sure about this */ | |
519 | cuda_state = idle; | |
520 | cuda_start(); | |
521 | } | |
522 | } else { | |
523 | out_8(&via[SR], req->data[data_index++]); | |
524 | out_8(&via[B], in_8(&via[B]) ^ TACK); | |
525 | } | |
526 | break; | |
527 | ||
528 | case reading: | |
529 | *reply_ptr++ = in_8(&via[SR]); | |
530 | if (status == TIP) { | |
531 | /* that's all folks */ | |
532 | out_8(&via[B], in_8(&via[B]) | TACK | TIP); | |
533 | cuda_state = read_done; | |
534 | } else { | |
535 | /* assert status == TIP | TREQ */ | |
536 | if (status != TIP + TREQ) | |
537 | printk("cuda: state=reading status=%x\n", status); | |
538 | out_8(&via[B], in_8(&via[B]) ^ TACK); | |
539 | } | |
540 | break; | |
541 | ||
542 | case read_done: | |
543 | (void)in_8(&via[SR]); | |
544 | if (reading_reply) { | |
545 | req = current_req; | |
546 | req->reply_len = reply_ptr - req->reply; | |
547 | if (req->data[0] == ADB_PACKET) { | |
548 | /* Have to adjust the reply from ADB commands */ | |
549 | if (req->reply_len <= 2 || (req->reply[1] & 2) != 0) { | |
550 | /* the 0x2 bit indicates no response */ | |
551 | req->reply_len = 0; | |
552 | } else { | |
553 | /* leave just the command and result bytes in the reply */ | |
554 | req->reply_len -= 2; | |
555 | memmove(req->reply, req->reply + 2, req->reply_len); | |
556 | } | |
557 | } | |
558 | current_req = req->next; | |
559 | complete = 1; | |
560 | } else { | |
561 | /* This is tricky. We must break the spinlock to call | |
562 | * cuda_input. However, doing so means we might get | |
563 | * re-entered from another CPU getting an interrupt | |
564 | * or calling cuda_poll(). I ended up using the stack | |
565 | * (it's only for 16 bytes) and moving the actual | |
566 | * call to cuda_input to outside of the lock. | |
567 | */ | |
568 | ibuf_len = reply_ptr - cuda_rbuf; | |
569 | memcpy(ibuf, cuda_rbuf, ibuf_len); | |
570 | } | |
571 | if (status == TREQ) { | |
572 | out_8(&via[B], in_8(&via[B]) & ~TIP); | |
573 | cuda_state = reading; | |
574 | reply_ptr = cuda_rbuf; | |
575 | reading_reply = 0; | |
576 | } else { | |
577 | cuda_state = idle; | |
578 | cuda_start(); | |
579 | } | |
580 | break; | |
581 | ||
582 | default: | |
583 | printk("cuda_interrupt: unknown cuda_state %d?\n", cuda_state); | |
584 | } | |
585 | spin_unlock(&cuda_lock); | |
586 | if (complete && req) { | |
587 | void (*done)(struct adb_request *) = req->done; | |
588 | mb(); | |
589 | req->complete = 1; | |
590 | /* Here, we assume that if the request has a done member, the | |
591 | * struct request will survive to setting req->complete to 1 | |
592 | */ | |
593 | if (done) | |
594 | (*done)(req); | |
595 | } | |
596 | if (ibuf_len) | |
597 | cuda_input(ibuf, ibuf_len, regs); | |
598 | return IRQ_HANDLED; | |
599 | } | |
600 | ||
601 | static void | |
602 | cuda_input(unsigned char *buf, int nb, struct pt_regs *regs) | |
603 | { | |
604 | int i; | |
605 | ||
606 | switch (buf[0]) { | |
607 | case ADB_PACKET: | |
608 | #ifdef CONFIG_XMON | |
609 | if (nb == 5 && buf[2] == 0x2c) { | |
610 | extern int xmon_wants_key, xmon_adb_keycode; | |
611 | if (xmon_wants_key) { | |
612 | xmon_adb_keycode = buf[3]; | |
613 | return; | |
614 | } | |
615 | } | |
616 | #endif /* CONFIG_XMON */ | |
617 | #ifdef CONFIG_ADB | |
618 | adb_input(buf+2, nb-2, regs, buf[1] & 0x40); | |
619 | #endif /* CONFIG_ADB */ | |
620 | break; | |
621 | ||
622 | default: | |
623 | printk("data from cuda (%d bytes):", nb); | |
624 | for (i = 0; i < nb; ++i) | |
625 | printk(" %.2x", buf[i]); | |
626 | printk("\n"); | |
627 | } | |
628 | } |