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Merge tag 'for-linus-v3.11-rc1-2' of git://oss.sgi.com/xfs/xfs
[linux-2.6.git] / drivers / macintosh / via-pmu68k.c
bloba00ee41f0573ad458fca83b00be773d0f70716fe
1 /*
2 * Device driver for the PMU on 68K-based Apple PowerBooks
3 *
4 * The VIA (versatile interface adapter) interfaces to the PMU,
5 * a 6805 microprocessor core whose primary function is to control
6 * battery charging and system power on the PowerBooks.
7 * The PMU also controls the ADB (Apple Desktop Bus) which connects
8 * to the keyboard and mouse, as well as the non-volatile RAM
9 * and the RTC (real time clock) chip.
10 *
11 * Adapted for 68K PMU by Joshua M. Thompson
12 *
13 * Based largely on the PowerMac PMU code by Paul Mackerras and
14 * Fabio Riccardi.
15 *
16 * Also based on the PMU driver from MkLinux by Apple Computer, Inc.
17 * and the Open Software Foundation, Inc.
18 */
19
20 #include <stdarg.h>
21 #include <linux/types.h>
22 #include <linux/errno.h>
23 #include <linux/kernel.h>
24 #include <linux/delay.h>
25 #include <linux/miscdevice.h>
26 #include <linux/blkdev.h>
27 #include <linux/pci.h>
28 #include <linux/init.h>
29 #include <linux/interrupt.h>
30
31 #include <linux/adb.h>
32 #include <linux/pmu.h>
33 #include <linux/cuda.h>
34
35 #include <asm/macintosh.h>
36 #include <asm/macints.h>
37 #include <asm/mac_via.h>
38
39 #include <asm/pgtable.h>
40 #include <asm/irq.h>
41 #include <asm/uaccess.h>
42
43 /* Misc minor number allocated for /dev/pmu */
44 #define PMU_MINOR 154
45
46 /* VIA registers - spaced 0x200 bytes apart */
47 #define RS 0x200 /* skip between registers */
48 #define B 0 /* B-side data */
49 #define A RS /* A-side data */
50 #define DIRB (2*RS) /* B-side direction (1=output) */
51 #define DIRA (3*RS) /* A-side direction (1=output) */
52 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
53 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
54 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
55 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
56 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
57 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
58 #define SR (10*RS) /* Shift register */
59 #define ACR (11*RS) /* Auxiliary control register */
60 #define PCR (12*RS) /* Peripheral control register */
61 #define IFR (13*RS) /* Interrupt flag register */
62 #define IER (14*RS) /* Interrupt enable register */
63 #define ANH (15*RS) /* A-side data, no handshake */
64
65 /* Bits in B data register: both active low */
66 #define TACK 0x02 /* Transfer acknowledge (input) */
67 #define TREQ 0x04 /* Transfer request (output) */
68
69 /* Bits in ACR */
70 #define SR_CTRL 0x1c /* Shift register control bits */
71 #define SR_EXT 0x0c /* Shift on external clock */
72 #define SR_OUT 0x10 /* Shift out if 1 */
73
74 /* Bits in IFR and IER */
75 #define SR_INT 0x04 /* Shift register full/empty */
76 #define CB1_INT 0x10 /* transition on CB1 input */
77
78 static enum pmu_state {
79 idle,
80 sending,
81 intack,
82 reading,
83 reading_intr,
84 } pmu_state;
85
86 static struct adb_request *current_req;
87 static struct adb_request *last_req;
88 static struct adb_request *req_awaiting_reply;
89 static unsigned char interrupt_data[32];
90 static unsigned char *reply_ptr;
91 static int data_index;
92 static int data_len;
93 static int adb_int_pending;
94 static int pmu_adb_flags;
95 static int adb_dev_map;
96 static struct adb_request bright_req_1, bright_req_2, bright_req_3;
97 static int pmu_kind = PMU_UNKNOWN;
98 static int pmu_fully_inited;
99
100 int asleep;
101
102 static int pmu_probe(void);
103 static int pmu_init(void);
104 static void pmu_start(void);
105 static irqreturn_t pmu_interrupt(int irq, void *arg);
106 static int pmu_send_request(struct adb_request *req, int sync);
107 static int pmu_autopoll(int devs);
108 void pmu_poll(void);
109 static int pmu_reset_bus(void);
110
111 static void pmu_start(void);
112 static void send_byte(int x);
113 static void recv_byte(void);
114 static void pmu_done(struct adb_request *req);
115 static void pmu_handle_data(unsigned char *data, int len);
116 static void set_volume(int level);
117 static void pmu_enable_backlight(int on);
118 static void pmu_set_brightness(int level);
119
120 struct adb_driver via_pmu_driver = {
121 "68K PMU",
122 pmu_probe,
123 pmu_init,
124 pmu_send_request,
125 pmu_autopoll,
126 pmu_poll,
127 pmu_reset_bus
128 };
129
130 /*
131 * This table indicates for each PMU opcode:
132 * - the number of data bytes to be sent with the command, or -1
133 * if a length byte should be sent,
134 * - the number of response bytes which the PMU will return, or
135 * -1 if it will send a length byte.
136 */
137 static s8 pmu_data_len[256][2] = {
138 /* 0 1 2 3 4 5 6 7 */
139 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
140 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
141 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
142 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
143 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
144 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
145 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
146 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
147 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
148 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
149 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
150 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
151 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
152 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
153 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
154 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
155 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
156 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
157 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
158 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
159 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
160 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
161 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
162 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
163 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
164 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
165 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
166 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
167 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
168 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
169 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
170 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
171 };
172
173 int pmu_probe(void)
174 {
175 if (macintosh_config->adb_type == MAC_ADB_PB1) {
176 pmu_kind = PMU_68K_V1;
177 } else if (macintosh_config->adb_type == MAC_ADB_PB2) {
178 pmu_kind = PMU_68K_V2;
179 } else {
180 return -ENODEV;
181 }
182
183 pmu_state = idle;
184
185 return 0;
186 }
187
188 static int
189 pmu_init(void)
190 {
191 int timeout;
192 volatile struct adb_request req;
193
194 via2[B] |= TREQ; /* negate TREQ */
195 via2[DIRB] = (via2[DIRB] | TREQ) & ~TACK; /* TACK in, TREQ out */
196
197 pmu_request((struct adb_request *) &req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB);
198 timeout = 100000;
199 while (!req.complete) {
200 if (--timeout < 0) {
201 printk(KERN_ERR "pmu_init: no response from PMU\n");
202 return -EAGAIN;
203 }
204 udelay(10);
205 pmu_poll();
206 }
207
208 /* ack all pending interrupts */
209 timeout = 100000;
210 interrupt_data[0] = 1;
211 while (interrupt_data[0] || pmu_state != idle) {
212 if (--timeout < 0) {
213 printk(KERN_ERR "pmu_init: timed out acking intrs\n");
214 return -EAGAIN;
215 }
216 if (pmu_state == idle) {
217 adb_int_pending = 1;
218 pmu_interrupt(0, NULL);
219 }
220 pmu_poll();
221 udelay(10);
222 }
223
224 pmu_request((struct adb_request *) &req, NULL, 2, PMU_SET_INTR_MASK,
225 PMU_INT_ADB_AUTO|PMU_INT_SNDBRT|PMU_INT_ADB);
226 timeout = 100000;
227 while (!req.complete) {
228 if (--timeout < 0) {
229 printk(KERN_ERR "pmu_init: no response from PMU\n");
230 return -EAGAIN;
231 }
232 udelay(10);
233 pmu_poll();
234 }
235
236 bright_req_1.complete = 1;
237 bright_req_2.complete = 1;
238 bright_req_3.complete = 1;
239
240 if (request_irq(IRQ_MAC_ADB_SR, pmu_interrupt, 0, "pmu-shift",
241 pmu_interrupt)) {
242 printk(KERN_ERR "pmu_init: can't get irq %d\n",
243 IRQ_MAC_ADB_SR);
244 return -EAGAIN;
245 }
246 if (request_irq(IRQ_MAC_ADB_CL, pmu_interrupt, 0, "pmu-clock",
247 pmu_interrupt)) {
248 printk(KERN_ERR "pmu_init: can't get irq %d\n",
249 IRQ_MAC_ADB_CL);
250 free_irq(IRQ_MAC_ADB_SR, pmu_interrupt);
251 return -EAGAIN;
252 }
253
254 pmu_fully_inited = 1;
255
256 /* Enable backlight */
257 pmu_enable_backlight(1);
258
259 printk("adb: PMU 68K driver v0.5 for Unified ADB.\n");
260
261 return 0;
262 }
263
264 int
265 pmu_get_model(void)
266 {
267 return pmu_kind;
268 }
269
270 /* Send an ADB command */
271 static int
272 pmu_send_request(struct adb_request *req, int sync)
273 {
274 int i, ret;
275
276 if (!pmu_fully_inited)
277 {
278 req->complete = 1;
279 return -ENXIO;
280 }
281
282 ret = -EINVAL;
283
284 switch (req->data[0]) {
285 case PMU_PACKET:
286 for (i = 0; i < req->nbytes - 1; ++i)
287 req->data[i] = req->data[i+1];
288 --req->nbytes;
289 if (pmu_data_len[req->data[0]][1] != 0) {
290 req->reply[0] = ADB_RET_OK;
291 req->reply_len = 1;
292 } else
293 req->reply_len = 0;
294 ret = pmu_queue_request(req);
295 break;
296 case CUDA_PACKET:
297 switch (req->data[1]) {
298 case CUDA_GET_TIME:
299 if (req->nbytes != 2)
300 break;
301 req->data[0] = PMU_READ_RTC;
302 req->nbytes = 1;
303 req->reply_len = 3;
304 req->reply[0] = CUDA_PACKET;
305 req->reply[1] = 0;
306 req->reply[2] = CUDA_GET_TIME;
307 ret = pmu_queue_request(req);
308 break;
309 case CUDA_SET_TIME:
310 if (req->nbytes != 6)
311 break;
312 req->data[0] = PMU_SET_RTC;
313 req->nbytes = 5;
314 for (i = 1; i <= 4; ++i)
315 req->data[i] = req->data[i+1];
316 req->reply_len = 3;
317 req->reply[0] = CUDA_PACKET;
318 req->reply[1] = 0;
319 req->reply[2] = CUDA_SET_TIME;
320 ret = pmu_queue_request(req);
321 break;
322 case CUDA_GET_PRAM:
323 if (req->nbytes != 4)
324 break;
325 req->data[0] = PMU_READ_NVRAM;
326 req->data[1] = req->data[2];
327 req->data[2] = req->data[3];
328 req->nbytes = 3;
329 req->reply_len = 3;
330 req->reply[0] = CUDA_PACKET;
331 req->reply[1] = 0;
332 req->reply[2] = CUDA_GET_PRAM;
333 ret = pmu_queue_request(req);
334 break;
335 case CUDA_SET_PRAM:
336 if (req->nbytes != 5)
337 break;
338 req->data[0] = PMU_WRITE_NVRAM;
339 req->data[1] = req->data[2];
340 req->data[2] = req->data[3];
341 req->data[3] = req->data[4];
342 req->nbytes = 4;
343 req->reply_len = 3;
344 req->reply[0] = CUDA_PACKET;
345 req->reply[1] = 0;
346 req->reply[2] = CUDA_SET_PRAM;
347 ret = pmu_queue_request(req);
348 break;
349 }
350 break;
351 case ADB_PACKET:
352 for (i = req->nbytes - 1; i > 1; --i)
353 req->data[i+2] = req->data[i];
354 req->data[3] = req->nbytes - 2;
355 req->data[2] = pmu_adb_flags;
356 /*req->data[1] = req->data[1];*/
357 req->data[0] = PMU_ADB_CMD;
358 req->nbytes += 2;
359 req->reply_expected = 1;
360 req->reply_len = 0;
361 ret = pmu_queue_request(req);
362 break;
363 }
364 if (ret)
365 {
366 req->complete = 1;
367 return ret;
368 }
369
370 if (sync) {
371 while (!req->complete)
372 pmu_poll();
373 }
374
375 return 0;
376 }
377
378 /* Enable/disable autopolling */
379 static int
380 pmu_autopoll(int devs)
381 {
382 struct adb_request req;
383
384 if (!pmu_fully_inited) return -ENXIO;
385
386 if (devs) {
387 adb_dev_map = devs;
388 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
389 adb_dev_map >> 8, adb_dev_map);
390 pmu_adb_flags = 2;
391 } else {
392 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
393 pmu_adb_flags = 0;
394 }
395 while (!req.complete)
396 pmu_poll();
397 return 0;
398 }
399
400 /* Reset the ADB bus */
401 static int
402 pmu_reset_bus(void)
403 {
404 struct adb_request req;
405 long timeout;
406 int save_autopoll = adb_dev_map;
407
408 if (!pmu_fully_inited) return -ENXIO;
409
410 /* anyone got a better idea?? */
411 pmu_autopoll(0);
412
413 req.nbytes = 5;
414 req.done = NULL;
415 req.data[0] = PMU_ADB_CMD;
416 req.data[1] = 0;
417 req.data[2] = 3; /* ADB_BUSRESET ??? */
418 req.data[3] = 0;
419 req.data[4] = 0;
420 req.reply_len = 0;
421 req.reply_expected = 1;
422 if (pmu_queue_request(&req) != 0)
423 {
424 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
425 return -EIO;
426 }
427 while (!req.complete)
428 pmu_poll();
429 timeout = 100000;
430 while (!req.complete) {
431 if (--timeout < 0) {
432 printk(KERN_ERR "pmu_adb_reset_bus (reset): no response from PMU\n");
433 return -EIO;
434 }
435 udelay(10);
436 pmu_poll();
437 }
438
439 if (save_autopoll != 0)
440 pmu_autopoll(save_autopoll);
441
442 return 0;
443 }
444
445 /* Construct and send a pmu request */
446 int
447 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
448 int nbytes, ...)
449 {
450 va_list list;
451 int i;
452
453 if (nbytes < 0 || nbytes > 32) {
454 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
455 req->complete = 1;
456 return -EINVAL;
457 }
458 req->nbytes = nbytes;
459 req->done = done;
460 va_start(list, nbytes);
461 for (i = 0; i < nbytes; ++i)
462 req->data[i] = va_arg(list, int);
463 va_end(list);
464 if (pmu_data_len[req->data[0]][1] != 0) {
465 req->reply[0] = ADB_RET_OK;
466 req->reply_len = 1;
467 } else
468 req->reply_len = 0;
469 req->reply_expected = 0;
470 return pmu_queue_request(req);
471 }
472
473 int
474 pmu_queue_request(struct adb_request *req)
475 {
476 unsigned long flags;
477 int nsend;
478
479 if (req->nbytes <= 0) {
480 req->complete = 1;
481 return 0;
482 }
483 nsend = pmu_data_len[req->data[0]][0];
484 if (nsend >= 0 && req->nbytes != nsend + 1) {
485 req->complete = 1;
486 return -EINVAL;
487 }
488
489 req->next = NULL;
490 req->sent = 0;
491 req->complete = 0;
492 local_irq_save(flags);
493
494 if (current_req != 0) {
495 last_req->next = req;
496 last_req = req;
497 } else {
498 current_req = req;
499 last_req = req;
500 if (pmu_state == idle)
501 pmu_start();
502 }
503
504 local_irq_restore(flags);
505 return 0;
506 }
507
508 static void
509 send_byte(int x)
510 {
511 via1[ACR] |= SR_CTRL;
512 via1[SR] = x;
513 via2[B] &= ~TREQ; /* assert TREQ */
514 }
515
516 static void
517 recv_byte(void)
518 {
519 char c;
520
521 via1[ACR] = (via1[ACR] | SR_EXT) & ~SR_OUT;
522 c = via1[SR]; /* resets SR */
523 via2[B] &= ~TREQ;
524 }
525
526 static void
527 pmu_start(void)
528 {
529 unsigned long flags;
530 struct adb_request *req;
531
532 /* assert pmu_state == idle */
533 /* get the packet to send */
534 local_irq_save(flags);
535 req = current_req;
536 if (req == 0 || pmu_state != idle
537 || (req->reply_expected && req_awaiting_reply))
538 goto out;
539
540 pmu_state = sending;
541 data_index = 1;
542 data_len = pmu_data_len[req->data[0]][0];
543
544 /* set the shift register to shift out and send a byte */
545 send_byte(req->data[0]);
546
547 out:
548 local_irq_restore(flags);
549 }
550
551 void
552 pmu_poll(void)
553 {
554 unsigned long flags;
555
556 local_irq_save(flags);
557 if (via1[IFR] & SR_INT) {
558 via1[IFR] = SR_INT;
559 pmu_interrupt(IRQ_MAC_ADB_SR, NULL);
560 }
561 if (via1[IFR] & CB1_INT) {
562 via1[IFR] = CB1_INT;
563 pmu_interrupt(IRQ_MAC_ADB_CL, NULL);
564 }
565 local_irq_restore(flags);
566 }
567
568 static irqreturn_t
569 pmu_interrupt(int irq, void *dev_id)
570 {
571 struct adb_request *req;
572 int timeout, bite = 0; /* to prevent compiler warning */
573
574 #if 0
575 printk("pmu_interrupt: irq %d state %d acr %02X, b %02X data_index %d/%d adb_int_pending %d\n",
576 irq, pmu_state, (uint) via1[ACR], (uint) via2[B], data_index, data_len, adb_int_pending);
577 #endif
578
579 if (irq == IRQ_MAC_ADB_CL) { /* CB1 interrupt */
580 adb_int_pending = 1;
581 } else if (irq == IRQ_MAC_ADB_SR) { /* SR interrupt */
582 if (via2[B] & TACK) {
583 printk(KERN_DEBUG "PMU: SR_INT but ack still high! (%x)\n", via2[B]);
584 }
585
586 /* if reading grab the byte */
587 if ((via1[ACR] & SR_OUT) == 0) bite = via1[SR];
588
589 /* reset TREQ and wait for TACK to go high */
590 via2[B] |= TREQ;
591 timeout = 3200;
592 while (!(via2[B] & TACK)) {
593 if (--timeout < 0) {
594 printk(KERN_ERR "PMU not responding (!ack)\n");
595 goto finish;
596 }
597 udelay(10);
598 }
599
600 switch (pmu_state) {
601 case sending:
602 req = current_req;
603 if (data_len < 0) {
604 data_len = req->nbytes - 1;
605 send_byte(data_len);
606 break;
607 }
608 if (data_index <= data_len) {
609 send_byte(req->data[data_index++]);
610 break;
611 }
612 req->sent = 1;
613 data_len = pmu_data_len[req->data[0]][1];
614 if (data_len == 0) {
615 pmu_state = idle;
616 current_req = req->next;
617 if (req->reply_expected)
618 req_awaiting_reply = req;
619 else
620 pmu_done(req);
621 } else {
622 pmu_state = reading;
623 data_index = 0;
624 reply_ptr = req->reply + req->reply_len;
625 recv_byte();
626 }
627 break;
628
629 case intack:
630 data_index = 0;
631 data_len = -1;
632 pmu_state = reading_intr;
633 reply_ptr = interrupt_data;
634 recv_byte();
635 break;
636
637 case reading:
638 case reading_intr:
639 if (data_len == -1) {
640 data_len = bite;
641 if (bite > 32)
642 printk(KERN_ERR "PMU: bad reply len %d\n",
643 bite);
644 } else {
645 reply_ptr[data_index++] = bite;
646 }
647 if (data_index < data_len) {
648 recv_byte();
649 break;
650 }
651
652 if (pmu_state == reading_intr) {
653 pmu_handle_data(interrupt_data, data_index);
654 } else {
655 req = current_req;
656 current_req = req->next;
657 req->reply_len += data_index;
658 pmu_done(req);
659 }
660 pmu_state = idle;
661
662 break;
663
664 default:
665 printk(KERN_ERR "pmu_interrupt: unknown state %d?\n",
666 pmu_state);
667 }
668 }
669 finish:
670 if (pmu_state == idle) {
671 if (adb_int_pending) {
672 pmu_state = intack;
673 send_byte(PMU_INT_ACK);
674 adb_int_pending = 0;
675 } else if (current_req) {
676 pmu_start();
677 }
678 }
679
680 #if 0
681 printk("pmu_interrupt: exit state %d acr %02X, b %02X data_index %d/%d adb_int_pending %d\n",
682 pmu_state, (uint) via1[ACR], (uint) via2[B], data_index, data_len, adb_int_pending);
683 #endif
684 return IRQ_HANDLED;
685 }
686
687 static void
688 pmu_done(struct adb_request *req)
689 {
690 req->complete = 1;
691 if (req->done)
692 (*req->done)(req);
693 }
694
695 /* Interrupt data could be the result data from an ADB cmd */
696 static void
697 pmu_handle_data(unsigned char *data, int len)
698 {
699 static int show_pmu_ints = 1;
700
701 asleep = 0;
702 if (len < 1) {
703 adb_int_pending = 0;
704 return;
705 }
706 if (data[0] & PMU_INT_ADB) {
707 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
708 struct adb_request *req = req_awaiting_reply;
709 if (req == 0) {
710 printk(KERN_ERR "PMU: extra ADB reply\n");
711 return;
712 }
713 req_awaiting_reply = NULL;
714 if (len <= 2)
715 req->reply_len = 0;
716 else {
717 memcpy(req->reply, data + 1, len - 1);
718 req->reply_len = len - 1;
719 }
720 pmu_done(req);
721 } else {
722 adb_input(data+1, len-1, 1);
723 }
724 } else {
725 if (data[0] == 0x08 && len == 3) {
726 /* sound/brightness buttons pressed */
727 pmu_set_brightness(data[1] >> 3);
728 set_volume(data[2]);
729 } else if (show_pmu_ints
730 && !(data[0] == PMU_INT_TICK && len == 1)) {
731 int i;
732 printk(KERN_DEBUG "pmu intr");
733 for (i = 0; i < len; ++i)
734 printk(" %.2x", data[i]);
735 printk("\n");
736 }
737 }
738 }
739
740 static int backlight_level = -1;
741 static int backlight_enabled = 0;
742
743 #define LEVEL_TO_BRIGHT(lev) ((lev) < 1? 0x7f: 0x4a - ((lev) << 1))
744
745 static void
746 pmu_enable_backlight(int on)
747 {
748 struct adb_request req;
749
750 if (on) {
751 /* first call: get current backlight value */
752 if (backlight_level < 0) {
753 switch(pmu_kind) {
754 case PMU_68K_V1:
755 case PMU_68K_V2:
756 pmu_request(&req, NULL, 3, PMU_READ_NVRAM, 0x14, 0xe);
757 while (!req.complete)
758 pmu_poll();
759 printk(KERN_DEBUG "pmu: nvram returned bright: %d\n", (int)req.reply[1]);
760 backlight_level = req.reply[1];
761 break;
762 default:
763 backlight_enabled = 0;
764 return;
765 }
766 }
767 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
768 LEVEL_TO_BRIGHT(backlight_level));
769 while (!req.complete)
770 pmu_poll();
771 }
772 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
773 PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
774 while (!req.complete)
775 pmu_poll();
776 backlight_enabled = on;
777 }
778
779 static void
780 pmu_set_brightness(int level)
781 {
782 int bright;
783
784 backlight_level = level;
785 bright = LEVEL_TO_BRIGHT(level);
786 if (!backlight_enabled)
787 return;
788 if (bright_req_1.complete)
789 pmu_request(&bright_req_1, NULL, 2, PMU_BACKLIGHT_BRIGHT,
790 bright);
791 if (bright_req_2.complete)
792 pmu_request(&bright_req_2, NULL, 2, PMU_POWER_CTRL,
793 PMU_POW_BACKLIGHT | (bright < 0x7f ? PMU_POW_ON : PMU_POW_OFF));
794 }
795
796 void
797 pmu_enable_irled(int on)
798 {
799 struct adb_request req;
800
801 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
802 (on ? PMU_POW_ON : PMU_POW_OFF));
803 while (!req.complete)
804 pmu_poll();
805 }
806
807 static void
808 set_volume(int level)
809 {
810 }
811
812 int
813 pmu_present(void)
814 {
815 return (pmu_kind != PMU_UNKNOWN);
816 }
Linus' kernel tree