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ACPICA: Update version to 20081031
[deliverable/linux.git] / drivers / macintosh / mediabay.c
CommitLineData
1da177e4
LT		 1/*
2 * Driver for the media bay on the PowerBook 3400 and 2400.
3 *
4 * Copyright (C) 1998 Paul Mackerras.
5 *
6 * Various evolutions by Benjamin Herrenschmidt & Henry Worth
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
1da177e4
LT		 13#include <linux/types.h>
14#include <linux/errno.h>
15#include <linux/kernel.h>
16#include <linux/delay.h>
17#include <linux/sched.h>
18#include <linux/timer.h>
1da177e4
LT		 19#include <linux/stddef.h>
20#include <linux/init.h>
21#include <linux/ide.h>
33f6e794 22#include <linux/kthread.h>
9a24729d 23#include <linux/mutex.h>
1da177e4
LT		 24#include <asm/prom.h>
25#include <asm/pgtable.h>
26#include <asm/io.h>
27#include <asm/machdep.h>
28#include <asm/pmac_feature.h>
29#include <asm/mediabay.h>
30#include <asm/sections.h>
31#include <asm/ohare.h>
32#include <asm/heathrow.h>
33#include <asm/keylargo.h>
34#include <linux/adb.h>
35#include <linux/pmu.h>
36
37
38#define MB_DEBUG
1da177e4
LT		 39
40#ifdef MB_DEBUG
41#define MBDBG(fmt, arg...) printk(KERN_INFO fmt , ## arg)
42#else
43#define MBDBG(fmt, arg...) do { } while (0)
44#endif
45
46#define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2))
47#define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r))
48
49#define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r)))
50#define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v)))
51#define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v)))
52#define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v)))
53#define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r)))
54#define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v)))
55
56struct media_bay_info;
57
58struct mb_ops {
59 char* name;
60 void (*init)(struct media_bay_info *bay);
61 u8 (*content)(struct media_bay_info *bay);
62 void (*power)(struct media_bay_info *bay, int on_off);
63 int (*setup_bus)(struct media_bay_info *bay, u8 device_id);
64 void (*un_reset)(struct media_bay_info *bay);
65 void (*un_reset_ide)(struct media_bay_info *bay);
66};
67
68struct media_bay_info {
69 u32 __iomem *base;
70 int content_id;
71 int state;
72 int last_value;
73 int value_count;
74 int timer;
75 struct macio_dev *mdev;
76 struct mb_ops* ops;
77 int index;
78 int cached_gpio;
79 int sleeping;
9a24729d 80 struct mutex lock;
34394e45 81#ifdef CONFIG_BLK_DEV_IDE_PMAC
2dde7861 82 ide_hwif_t *cd_port;
1da177e4 83 void __iomem *cd_base;
1da177e4
LT		 84 int cd_irq;
85 int cd_retry;
86#endif
305c7368 87#if defined(CONFIG_BLK_DEV_IDE_PMAC)
34394e45
BZ		 88 int cd_index;
89#endif
1da177e4
LT		 90};
91
92#define MAX_BAYS 2
93
94static struct media_bay_info media_bays[MAX_BAYS];
95int media_bay_count = 0;
96
34394e45 97#ifdef CONFIG_BLK_DEV_IDE_PMAC
1da177e4
LT		 98/* check the busy bit in the media-bay ide interface
99 (assumes the media-bay contains an ide device) */
100#define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0)
101#endif
102
103/*
104 * Wait that number of ms between each step in normal polling mode
105 */
106#define MB_POLL_DELAY 25
107
108/*
109 * Consider the media-bay ID value stable if it is the same for
110 * this number of milliseconds
111 */
112#define MB_STABLE_DELAY 100
113
114/* Wait after powering up the media bay this delay in ms
115 * timeout bumped for some powerbooks
116 */
117#define MB_POWER_DELAY 200
118
119/*
120 * Hold the media-bay reset signal true for this many ticks
121 * after a device is inserted before releasing it.
122 */
123#define MB_RESET_DELAY 50
124
125/*
126 * Wait this long after the reset signal is released and before doing
127 * further operations. After this delay, the IDE reset signal is released
128 * too for an IDE device
129 */
130#define MB_SETUP_DELAY 100
131
132/*
133 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
134 * (or until the device is ready) before waiting for busy bit to disappear
135 */
136#define MB_IDE_WAIT 1000
137
138/*
139 * Timeout waiting for busy bit of an IDE device to go down
140 */
141#define MB_IDE_TIMEOUT 5000
142
143/*
144 * Max retries of the full power up/down sequence for an IDE device
145 */
146#define MAX_CD_RETRIES 3
147
148/*
149 * States of a media bay
150 */
151enum {
152 mb_empty = 0, /* Idle */
153 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */
154 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */
155 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */
156 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */
157 mb_ide_waiting, /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */
158 mb_up, /* Media bay full */
159 mb_powering_down /* Powering down (avoid too fast down/up) */
160};
161
162#define MB_POWER_SOUND 0x08
163#define MB_POWER_FLOPPY 0x04
164#define MB_POWER_ATA 0x02
165#define MB_POWER_PCI 0x01
166#define MB_POWER_OFF 0x00
167
168/*
169 * Functions for polling content of media bay
170 */
171
aacaf9bd 172static u8
1da177e4
LT		 173ohare_mb_content(struct media_bay_info *bay)
174{
175 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
176}
177
aacaf9bd 178static u8
1da177e4
LT		 179heathrow_mb_content(struct media_bay_info *bay)
180{
181 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
182}
183
aacaf9bd 184static u8
1da177e4
LT		 185keylargo_mb_content(struct media_bay_info *bay)
186{
187 int new_gpio;
188
189 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA;
190 if (new_gpio) {
191 bay->cached_gpio = new_gpio;
192 return MB_NO;
193 } else if (bay->cached_gpio != new_gpio) {
194 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
195 (void)MB_IN32(bay, KEYLARGO_MBCR);
196 udelay(5);
197 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
198 (void)MB_IN32(bay, KEYLARGO_MBCR);
199 udelay(5);
200 bay->cached_gpio = new_gpio;
201 }
202 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7;
203}
204
205/*
206 * Functions for powering up/down the bay, puts the bay device
207 * into reset state as well
208 */
209
aacaf9bd 210static void
1da177e4
LT		 211ohare_mb_power(struct media_bay_info* bay, int on_off)
212{
213 if (on_off) {
214 /* Power up device, assert it's reset line */
215 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
216 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
217 } else {
218 /* Disable all devices */
219 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
220 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
221 /* Cut power from bay, release reset line */
222 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N);
223 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
224 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
225 }
226 MB_BIC(bay, OHARE_MBCR, 0x00000F00);
227}
228
aacaf9bd 229static void
1da177e4
LT		 230heathrow_mb_power(struct media_bay_info* bay, int on_off)
231{
232 if (on_off) {
233 /* Power up device, assert it's reset line */
234 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
235 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
236 } else {
237 /* Disable all devices */
238 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
239 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
240 /* Cut power from bay, release reset line */
241 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
242 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
243 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
244 }
245 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
246}
247
aacaf9bd 248static void
1da177e4
LT		 249keylargo_mb_power(struct media_bay_info* bay, int on_off)
250{
251 if (on_off) {
252 /* Power up device, assert it's reset line */
253 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
254 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
255 } else {
256 /* Disable all devices */
257 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
258 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
259 /* Cut power from bay, release reset line */
260 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
261 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
262 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
263 }
264 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
265}
266
267/*
268 * Functions for configuring the media bay for a given type of device,
269 * enable the related busses
270 */
271
aacaf9bd 272static int
1da177e4
LT		 273ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
274{
275 switch(device_id) {
276 case MB_FD:
277 case MB_FD1:
278 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
279 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
280 return 0;
281 case MB_CD:
282 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
283 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
284 return 0;
285 case MB_PCI:
286 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
287 return 0;
288 }
289 return -ENODEV;
290}
291
aacaf9bd 292static int
1da177e4
LT		 293heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
294{
295 switch(device_id) {
296 case MB_FD:
297 case MB_FD1:
298 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
299 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
300 return 0;
301 case MB_CD:
302 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
303 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
304 return 0;
305 case MB_PCI:
306 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
307 return 0;
308 }
309 return -ENODEV;
310}
311
aacaf9bd 312static int
1da177e4
LT		 313keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
314{
315 switch(device_id) {
316 case MB_CD:
317 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
318 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
319 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
320 return 0;
321 case MB_PCI:
322 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
323 return 0;
324 case MB_SOUND:
325 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
326 return 0;
327 }
328 return -ENODEV;
329}
330
331/*
332 * Functions for tweaking resets
333 */
334
aacaf9bd 335static void
1da177e4
LT		 336ohare_mb_un_reset(struct media_bay_info* bay)
337{
338 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
339}
340
aacaf9bd 341static void keylargo_mb_init(struct media_bay_info *bay)
1da177e4
LT		 342{
343 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
344}
345
aacaf9bd 346static void heathrow_mb_un_reset(struct media_bay_info* bay)
1da177e4
LT		 347{
348 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
349}
350
aacaf9bd 351static void keylargo_mb_un_reset(struct media_bay_info* bay)
1da177e4
LT		 352{
353 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
354}
355
aacaf9bd 356static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
1da177e4
LT		 357{
358 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
359}
360
aacaf9bd 361static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
1da177e4
LT		 362{
363 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
364}
365
aacaf9bd 366static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
1da177e4
LT		 367{
368 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
369}
370
aacaf9bd 371static inline void set_mb_power(struct media_bay_info* bay, int onoff)
1da177e4
LT		 372{
373 /* Power up up and assert the bay reset line */
374 if (onoff) {
375 bay->ops->power(bay, 1);
376 bay->state = mb_powering_up;
377 MBDBG("mediabay%d: powering up\n", bay->index);
378 } else {
379 /* Make sure everything is powered down & disabled */
380 bay->ops->power(bay, 0);
381 bay->state = mb_powering_down;
382 MBDBG("mediabay%d: powering down\n", bay->index);
383 }
384 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
385}
386
aacaf9bd 387static void poll_media_bay(struct media_bay_info* bay)
1da177e4
LT		 388{
389 int id = bay->ops->content(bay);
390
391 if (id == bay->last_value) {
392 if (id != bay->content_id) {
393 bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);
394 if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {
395 /* If the device type changes without going thru
396 * "MB_NO", we force a pass by "MB_NO" to make sure
397 * things are properly reset
398 */
399 if ((id != MB_NO) && (bay->content_id != MB_NO)) {
400 id = MB_NO;
401 MBDBG("mediabay%d: forcing MB_NO\n", bay->index);
402 }
403 MBDBG("mediabay%d: switching to %d\n", bay->index, id);
404 set_mb_power(bay, id != MB_NO);
405 bay->content_id = id;
406 if (id == MB_NO) {
34394e45 407#ifdef CONFIG_BLK_DEV_IDE_PMAC
1da177e4
LT		 408 bay->cd_retry = 0;
409#endif
410 printk(KERN_INFO "media bay %d is empty\n", bay->index);
411 }
412 }
413 }
414 } else {
415 bay->last_value = id;
416 bay->value_count = 0;
417 }
418}
419
305c7368 420#ifdef CONFIG_BLK_DEV_IDE_PMAC
aacaf9bd 421int check_media_bay(struct device_node *which_bay, int what)
1da177e4 422{
1da177e4
LT		 423 int i;
424
425 for (i=0; i<media_bay_count; i++)
426 if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) {
427 if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
428 return 0;
429 media_bays[i].cd_index = -1;
430 return -EINVAL;
431 }
1da177e4
LT		 432 return -ENODEV;
433}
434EXPORT_SYMBOL(check_media_bay);
435
aacaf9bd 436int check_media_bay_by_base(unsigned long base, int what)
1da177e4 437{
1da177e4
LT		 438 int i;
439
440 for (i=0; i<media_bay_count; i++)
441 if (media_bays[i].mdev && base == (unsigned long) media_bays[i].cd_base) {
442 if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
443 return 0;
444 media_bays[i].cd_index = -1;
445 return -EINVAL;
446 }
34394e45 447
1da177e4
LT		 448 return -ENODEV;
449}
450
aacaf9bd 451int media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base,
2dde7861 452 int irq, ide_hwif_t *hwif)
1da177e4 453{
1da177e4
LT		 454 int i;
455
456 for (i=0; i<media_bay_count; i++) {
457 struct media_bay_info* bay = &media_bays[i];
458
459 if (bay->mdev && which_bay == bay->mdev->ofdev.node) {
2dde7861 460 int timeout = 5000, index = hwif->index;
1da177e4 461
9a24729d 462 mutex_lock(&bay->lock);
1da177e4 463
2dde7861 464 bay->cd_port = hwif;
1da177e4
LT		 465 bay->cd_base = (void __iomem *) base;
466 bay->cd_irq = irq;
467
468 if ((MB_CD != bay->content_id) || bay->state != mb_up) {
9a24729d 469 mutex_unlock(&bay->lock);
1da177e4
LT		 470 return 0;
471 }
472 printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i);
473 do {
474 if (MB_IDE_READY(i)) {
475 bay->cd_index = index;
9a24729d 476 mutex_unlock(&bay->lock);
1da177e4
LT		 477 return 0;
478 }
479 mdelay(1);
480 } while(--timeout);
481 printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i);
9a24729d 482 mutex_unlock(&bay->lock);
1da177e4
LT		 483 return -ENODEV;
484 }
485 }
34394e45 486
1da177e4
LT		 487 return -ENODEV;
488}
34394e45 489#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1da177e4 490
aacaf9bd 491static void media_bay_step(int i)
1da177e4
LT		 492{
493 struct media_bay_info* bay = &media_bays[i];
494
495 /* We don't poll when powering down */
496 if (bay->state != mb_powering_down)
497 poll_media_bay(bay);
498
499 /* If timer expired or polling IDE busy, run state machine */
500 if ((bay->state != mb_ide_waiting) && (bay->timer != 0)) {
501 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
502 if (bay->timer > 0)
503 return;
504 bay->timer = 0;
505 }
506
507 switch(bay->state) {
508 case mb_powering_up:
509 if (bay->ops->setup_bus(bay, bay->last_value) < 0) {
510 MBDBG("mediabay%d: device not supported (kind:%d)\n", i, bay->content_id);
511 set_mb_power(bay, 0);
512 break;
513 }
514 bay->timer = msecs_to_jiffies(MB_RESET_DELAY);
515 bay->state = mb_enabling_bay;
516 MBDBG("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
517 break;
518 case mb_enabling_bay:
519 bay->ops->un_reset(bay);
520 bay->timer = msecs_to_jiffies(MB_SETUP_DELAY);
521 bay->state = mb_resetting;
522 MBDBG("mediabay%d: waiting reset (kind:%d)\n", i, bay->content_id);
523 break;
1da177e4
LT		 524 case mb_resetting:
525 if (bay->content_id != MB_CD) {
526 MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
527 bay->state = mb_up;
528 break;
529 }
34394e45 530#ifdef CONFIG_BLK_DEV_IDE_PMAC
1da177e4
LT		 531 MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id);
532 bay->ops->un_reset_ide(bay);
533 bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
534 bay->state = mb_ide_resetting;
535#else
536 printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i);
537 set_mb_power(bay, 0);
34394e45 538#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1da177e4 539 break;
34394e45 540#ifdef CONFIG_BLK_DEV_IDE_PMAC
1da177e4
LT		 541 case mb_ide_resetting:
542 bay->timer = msecs_to_jiffies(MB_IDE_TIMEOUT);
543 bay->state = mb_ide_waiting;
544 MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id);
545 break;
1da177e4
LT		 546 case mb_ide_waiting:
547 if (bay->cd_base == NULL) {
548 bay->timer = 0;
549 bay->state = mb_up;
550 MBDBG("mediabay%d: up before IDE init\n", i);
551 break;
552 } else if (MB_IDE_READY(i)) {
553 bay->timer = 0;
554 bay->state = mb_up;
555 if (bay->cd_index < 0) {
1da177e4
LT		 556 printk("mediabay %d, registering IDE...\n", i);
557 pmu_suspend();
2dde7861 558 ide_port_scan(bay->cd_port);
c1a8e398
BZ		 559 if (bay->cd_port->present)
560 bay->cd_index = bay->cd_port->index;
1da177e4
LT		 561 pmu_resume();
562 }
563 if (bay->cd_index == -1) {
564 /* We eventually do a retry */
565 bay->cd_retry++;
566 printk("IDE register error\n");
567 set_mb_power(bay, 0);
568 } else {
569 printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index);
570 MBDBG("mediabay %d IDE ready\n", i);
571 }
572 break;
573 } else if (bay->timer > 0)
574 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
575 if (bay->timer <= 0) {
576 printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n",
577 i, readb(bay->cd_base + 0x70));
578 MBDBG("mediabay%d: nIDE Timeout !\n", i);
579 set_mb_power(bay, 0);
580 bay->timer = 0;
581 }
582 break;
34394e45 583#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1da177e4
LT		 584 case mb_powering_down:
585 bay->state = mb_empty;
34394e45 586#ifdef CONFIG_BLK_DEV_IDE_PMAC
1da177e4
LT		 587 if (bay->cd_index >= 0) {
588 printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
589 bay->cd_index);
2dde7861 590 ide_port_unregister_devices(bay->cd_port);
1da177e4
LT		 591 bay->cd_index = -1;
592 }
593 if (bay->cd_retry) {
594 if (bay->cd_retry > MAX_CD_RETRIES) {
595 /* Should add an error sound (sort of beep in dmasound) */
596 printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i);
597 } else {
598 /* Force a new power down/up sequence */
599 bay->content_id = MB_NO;
600 }
601 }
34394e45 602#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1da177e4
LT		 603 MBDBG("mediabay%d: end of power down\n", i);
604 break;
605 }
606}
607
608/*
609 * This procedure runs as a kernel thread to poll the media bay
610 * once each tick and register and unregister the IDE interface
611 * with the IDE driver. It needs to be a thread because
612 * ide_register can't be called from interrupt context.
613 */
aacaf9bd 614static int media_bay_task(void *x)
1da177e4
LT		 615{
616 int i;
617
33f6e794 618 while (!kthread_should_stop()) {
1da177e4 619 for (i = 0; i < media_bay_count; ++i) {
9a24729d 620 mutex_lock(&media_bays[i].lock);
1da177e4
LT		 621 if (!media_bays[i].sleeping)
622 media_bay_step(i);
9a24729d 623 mutex_unlock(&media_bays[i].lock);
1da177e4
LT		 624 }
625
626 msleep_interruptible(MB_POLL_DELAY);
1da177e4 627 }
33f6e794 628 return 0;
1da177e4
LT		 629}
630
5e655772 631static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match)
1da177e4
LT		 632{
633 struct media_bay_info* bay;
634 u32 __iomem *regbase;
635 struct device_node *ofnode;
cc5d0189 636 unsigned long base;
1da177e4
LT		 637 int i;
638
639 ofnode = mdev->ofdev.node;
640
641 if (macio_resource_count(mdev) < 1)
642 return -ENODEV;
643 if (macio_request_resources(mdev, "media-bay"))
644 return -EBUSY;
645 /* Media bay registers are located at the beginning of the
cc5d0189
BH		 646 * mac-io chip, for now, we trick and align down the first
647 * resource passed in
1da177e4 648 */
cc5d0189
BH		 649 base = macio_resource_start(mdev, 0) & 0xffff0000u;
650 regbase = (u32 __iomem *)ioremap(base, 0x100);
1da177e4
LT		 651 if (regbase == NULL) {
652 macio_release_resources(mdev);
653 return -ENOMEM;
654 }
655
656 i = media_bay_count++;
657 bay = &media_bays[i];
658 bay->mdev = mdev;
659 bay->base = regbase;
660 bay->index = i;
661 bay->ops = match->data;
662 bay->sleeping = 0;
9a24729d 663 mutex_init(&bay->lock);
1da177e4
LT		 664
665 /* Init HW probing */
666 if (bay->ops->init)
667 bay->ops->init(bay);
668
669 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
670
671 /* Force an immediate detect */
672 set_mb_power(bay, 0);
673 msleep(MB_POWER_DELAY);
674 bay->content_id = MB_NO;
675 bay->last_value = bay->ops->content(bay);
676 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
677 bay->state = mb_empty;
678 do {
679 msleep(MB_POLL_DELAY);
680 media_bay_step(i);
681 } while((bay->state != mb_empty) &&
682 (bay->state != mb_up));
683
684 /* Mark us ready by filling our mdev data */
685 macio_set_drvdata(mdev, bay);
686
687 /* Startup kernel thread */
688 if (i == 0)
33f6e794 689 kthread_run(media_bay_task, NULL, "media-bay");
1da177e4
LT		 690
691 return 0;
692
693}
694
aacaf9bd 695static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
1da177e4
LT		 696{
697 struct media_bay_info *bay = macio_get_drvdata(mdev);
698
3a2d5b70
RW		 699 if (state.event != mdev->ofdev.dev.power.power_state.event
700 && (state.event & PM_EVENT_SLEEP)) {
9a24729d 701 mutex_lock(&bay->lock);
1da177e4
LT		 702 bay->sleeping = 1;
703 set_mb_power(bay, 0);
9a24729d 704 mutex_unlock(&bay->lock);
1da177e4
LT		 705 msleep(MB_POLL_DELAY);
706 mdev->ofdev.dev.power.power_state = state;
707 }
708 return 0;
709}
710
aacaf9bd 711static int media_bay_resume(struct macio_dev *mdev)
1da177e4
LT		 712{
713 struct media_bay_info *bay = macio_get_drvdata(mdev);
714
ca078bae 715 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
829ca9a3 716 mdev->ofdev.dev.power.power_state = PMSG_ON;
1da177e4
LT		 717
718 /* We re-enable the bay using it's previous content
719 only if it did not change. Note those bozo timings,
720 they seem to help the 3400 get it right.
721 */
722 /* Force MB power to 0 */
9a24729d 723 mutex_lock(&bay->lock);
1da177e4
LT		 724 set_mb_power(bay, 0);
725 msleep(MB_POWER_DELAY);
726 if (bay->ops->content(bay) != bay->content_id) {
727 printk("mediabay%d: content changed during sleep...\n", bay->index);
9a24729d 728 mutex_unlock(&bay->lock);
1da177e4
LT		 729 return 0;
730 }
731 set_mb_power(bay, 1);
732 bay->last_value = bay->content_id;
733 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
734 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
34394e45 735#ifdef CONFIG_BLK_DEV_IDE_PMAC
1da177e4
LT		 736 bay->cd_retry = 0;
737#endif
738 do {
739 msleep(MB_POLL_DELAY);
740 media_bay_step(bay->index);
741 } while((bay->state != mb_empty) &&
742 (bay->state != mb_up));
743 bay->sleeping = 0;
9a24729d 744 mutex_unlock(&bay->lock);
1da177e4
LT		 745 }
746 return 0;
747}
748
749
750/* Definitions of "ops" structures.
751 */
aacaf9bd 752static struct mb_ops ohare_mb_ops = {
1da177e4
LT		 753 .name = "Ohare",
754 .content = ohare_mb_content,
755 .power = ohare_mb_power,
756 .setup_bus = ohare_mb_setup_bus,
757 .un_reset = ohare_mb_un_reset,
758 .un_reset_ide = ohare_mb_un_reset_ide,
759};
760
aacaf9bd 761static struct mb_ops heathrow_mb_ops = {
1da177e4
LT		 762 .name = "Heathrow",
763 .content = heathrow_mb_content,
764 .power = heathrow_mb_power,
765 .setup_bus = heathrow_mb_setup_bus,
766 .un_reset = heathrow_mb_un_reset,
767 .un_reset_ide = heathrow_mb_un_reset_ide,
768};
769
aacaf9bd 770static struct mb_ops keylargo_mb_ops = {
1da177e4
LT		 771 .name = "KeyLargo",
772 .init = keylargo_mb_init,
773 .content = keylargo_mb_content,
774 .power = keylargo_mb_power,
775 .setup_bus = keylargo_mb_setup_bus,
776 .un_reset = keylargo_mb_un_reset,
777 .un_reset_ide = keylargo_mb_un_reset_ide,
778};
779
780/*
781 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
782 * register is always set when there is something in the media bay.
783 * This causes problems for the interrupt code if we attach an interrupt
784 * handler to the media-bay interrupt, because it tends to go into
785 * an infinite loop calling the media bay interrupt handler.
786 * Therefore we do it all by polling the media bay once each tick.
787 */
788
5e655772 789static struct of_device_id media_bay_match[] =
1da177e4
LT		 790{
791 {
792 .name = "media-bay",
1da177e4
LT		 793 .compatible = "keylargo-media-bay",
794 .data = &keylargo_mb_ops,
795 },
796 {
797 .name = "media-bay",
1da177e4
LT		 798 .compatible = "heathrow-media-bay",
799 .data = &heathrow_mb_ops,
800 },
801 {
802 .name = "media-bay",
1da177e4
LT		 803 .compatible = "ohare-media-bay",
804 .data = &ohare_mb_ops,
805 },
806 {},
807};
808
809static struct macio_driver media_bay_driver =
810{
811 .name = "media-bay",
812 .match_table = media_bay_match,
813 .probe = media_bay_attach,
814 .suspend = media_bay_suspend,
815 .resume = media_bay_resume
816};
817
818static int __init media_bay_init(void)
819{
820 int i;
821
822 for (i=0; i<MAX_BAYS; i++) {
823 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
824 media_bays[i].content_id = -1;
34394e45 825#ifdef CONFIG_BLK_DEV_IDE_PMAC
1da177e4
LT		 826 media_bays[i].cd_index = -1;
827#endif
828 }
e8222502
BH		 829 if (!machine_is(powermac))
830 return 0;
1da177e4
LT		 831
832 macio_register_driver(&media_bay_driver);
833
834 return 0;
835}
836
837device_initcall(media_bay_init);
Linux kernel - Deliverables
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