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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 */
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>
19#include <linux/stddef.h>
20#include <linux/init.h>
21#include <linux/kthread.h>
22#include <linux/mutex.h>
23#include <asm/prom.h>
24#include <asm/pgtable.h>
25#include <asm/io.h>
26#include <asm/machdep.h>
27#include <asm/pmac_feature.h>
28#include <asm/mediabay.h>
29#include <asm/sections.h>
30#include <asm/ohare.h>
31#include <asm/heathrow.h>
32#include <asm/keylargo.h>
33#include <linux/adb.h>
34#include <linux/pmu.h>
35
36#define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2))
37#define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r))
38
39#define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r)))
40#define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v)))
41#define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v)))
42#define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v)))
43#define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r)))
44#define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v)))
45
46struct media_bay_info;
47
48struct mb_ops {
49 char* name;
50 void (*init)(struct media_bay_info *bay);
51 u8 (*content)(struct media_bay_info *bay);
52 void (*power)(struct media_bay_info *bay, int on_off);
53 int (*setup_bus)(struct media_bay_info *bay, u8 device_id);
54 void (*un_reset)(struct media_bay_info *bay);
55 void (*un_reset_ide)(struct media_bay_info *bay);
56};
57
58struct media_bay_info {
59 u32 __iomem *base;
60 int content_id;
61 int state;
62 int last_value;
63 int value_count;
64 int timer;
65 struct macio_dev *mdev;
66 struct mb_ops* ops;
67 int index;
68 int cached_gpio;
69 int sleeping;
70 int user_lock;
71 struct mutex lock;
72};
73
74#define MAX_BAYS 2
75
76static struct media_bay_info media_bays[MAX_BAYS];
77static int media_bay_count = 0;
78
79/*
80 * Wait that number of ms between each step in normal polling mode
81 */
82#define MB_POLL_DELAY 25
83
84/*
85 * Consider the media-bay ID value stable if it is the same for
86 * this number of milliseconds
87 */
88#define MB_STABLE_DELAY 100
89
90/* Wait after powering up the media bay this delay in ms
91 * timeout bumped for some powerbooks
92 */
93#define MB_POWER_DELAY 200
94
95/*
96 * Hold the media-bay reset signal true for this many ticks
97 * after a device is inserted before releasing it.
98 */
99#define MB_RESET_DELAY 50
100
101/*
102 * Wait this long after the reset signal is released and before doing
103 * further operations. After this delay, the IDE reset signal is released
104 * too for an IDE device
105 */
106#define MB_SETUP_DELAY 100
107
108/*
109 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
110 * (or until the device is ready) before calling into the driver
111 */
112#define MB_IDE_WAIT 1000
113
114/*
115 * States of a media bay
116 */
117enum {
118 mb_empty = 0, /* Idle */
119 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */
120 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */
121 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */
122 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */
123 mb_up, /* Media bay full */
124 mb_powering_down /* Powering down (avoid too fast down/up) */
125};
126
127#define MB_POWER_SOUND 0x08
128#define MB_POWER_FLOPPY 0x04
129#define MB_POWER_ATA 0x02
130#define MB_POWER_PCI 0x01
131#define MB_POWER_OFF 0x00
132
133/*
134 * Functions for polling content of media bay
135 */
136
137static u8
138ohare_mb_content(struct media_bay_info *bay)
139{
140 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
141}
142
143static u8
144heathrow_mb_content(struct media_bay_info *bay)
145{
146 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
147}
148
149static u8
150keylargo_mb_content(struct media_bay_info *bay)
151{
152 int new_gpio;
153
154 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA;
155 if (new_gpio) {
156 bay->cached_gpio = new_gpio;
157 return MB_NO;
158 } else if (bay->cached_gpio != new_gpio) {
159 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
160 (void)MB_IN32(bay, KEYLARGO_MBCR);
161 udelay(5);
162 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
163 (void)MB_IN32(bay, KEYLARGO_MBCR);
164 udelay(5);
165 bay->cached_gpio = new_gpio;
166 }
167 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7;
168}
169
170/*
171 * Functions for powering up/down the bay, puts the bay device
172 * into reset state as well
173 */
174
175static void
176ohare_mb_power(struct media_bay_info* bay, int on_off)
177{
178 if (on_off) {
179 /* Power up device, assert it's reset line */
180 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
181 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
182 } else {
183 /* Disable all devices */
184 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
185 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
186 /* Cut power from bay, release reset line */
187 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N);
188 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
189 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
190 }
191 MB_BIC(bay, OHARE_MBCR, 0x00000F00);
192}
193
194static void
195heathrow_mb_power(struct media_bay_info* bay, int on_off)
196{
197 if (on_off) {
198 /* Power up device, assert it's reset line */
199 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
200 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
201 } else {
202 /* Disable all devices */
203 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
204 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
205 /* Cut power from bay, release reset line */
206 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
207 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
208 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
209 }
210 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
211}
212
213static void
214keylargo_mb_power(struct media_bay_info* bay, int on_off)
215{
216 if (on_off) {
217 /* Power up device, assert it's reset line */
218 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
219 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
220 } else {
221 /* Disable all devices */
222 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
223 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
224 /* Cut power from bay, release reset line */
225 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
226 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
227 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
228 }
229 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
230}
231
232/*
233 * Functions for configuring the media bay for a given type of device,
234 * enable the related busses
235 */
236
237static int
238ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
239{
240 switch(device_id) {
241 case MB_FD:
242 case MB_FD1:
243 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
244 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
245 return 0;
246 case MB_CD:
247 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
248 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
249 return 0;
250 case MB_PCI:
251 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
252 return 0;
253 }
254 return -ENODEV;
255}
256
257static int
258heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
259{
260 switch(device_id) {
261 case MB_FD:
262 case MB_FD1:
263 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
264 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
265 return 0;
266 case MB_CD:
267 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
268 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
269 return 0;
270 case MB_PCI:
271 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
272 return 0;
273 }
274 return -ENODEV;
275}
276
277static int
278keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
279{
280 switch(device_id) {
281 case MB_CD:
282 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
283 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
284 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
285 return 0;
286 case MB_PCI:
287 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
288 return 0;
289 case MB_SOUND:
290 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
291 return 0;
292 }
293 return -ENODEV;
294}
295
296/*
297 * Functions for tweaking resets
298 */
299
300static void
301ohare_mb_un_reset(struct media_bay_info* bay)
302{
303 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
304}
305
306static void keylargo_mb_init(struct media_bay_info *bay)
307{
308 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
309}
310
311static void heathrow_mb_un_reset(struct media_bay_info* bay)
312{
313 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
314}
315
316static void keylargo_mb_un_reset(struct media_bay_info* bay)
317{
318 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
319}
320
321static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
322{
323 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
324}
325
326static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
327{
328 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
329}
330
331static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
332{
333 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
334}
335
336static inline void set_mb_power(struct media_bay_info* bay, int onoff)
337{
338 /* Power up up and assert the bay reset line */
339 if (onoff) {
340 bay->ops->power(bay, 1);
341 bay->state = mb_powering_up;
342 pr_debug("mediabay%d: powering up\n", bay->index);
343 } else {
344 /* Make sure everything is powered down & disabled */
345 bay->ops->power(bay, 0);
346 bay->state = mb_powering_down;
347 pr_debug("mediabay%d: powering down\n", bay->index);
348 }
349 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
350}
351
352static void poll_media_bay(struct media_bay_info* bay)
353{
354 int id = bay->ops->content(bay);
355
356 static char *mb_content_types[] = {
357 "a floppy drive",
358 "a floppy drive",
359 "an unsuported audio device",
360 "an ATA device",
361 "an unsupported PCI device",
362 "an unknown device",
363 };
364
365 if (id != bay->last_value) {
366 bay->last_value = id;
367 bay->value_count = 0;
368 return;
369 }
370 if (id == bay->content_id)
371 return;
372
373 bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);
374 if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {
375 /* If the device type changes without going thru
376 * "MB_NO", we force a pass by "MB_NO" to make sure
377 * things are properly reset
378 */
379 if ((id != MB_NO) && (bay->content_id != MB_NO)) {
380 id = MB_NO;
381 pr_debug("mediabay%d: forcing MB_NO\n", bay->index);
382 }
383 pr_debug("mediabay%d: switching to %d\n", bay->index, id);
384 set_mb_power(bay, id != MB_NO);
385 bay->content_id = id;
386 if (id >= MB_NO || id < 0)
387 printk(KERN_INFO "mediabay%d: Bay is now empty\n", bay->index);
388 else
389 printk(KERN_INFO "mediabay%d: Bay contains %s\n",
390 bay->index, mb_content_types[id]);
391 }
392}
393
394int check_media_bay(struct macio_dev *baydev)
395{
396 struct media_bay_info* bay;
397 int id;
398
399 if (baydev == NULL)
400 return MB_NO;
401
402 /* This returns an instant snapshot, not locking, sine
403 * we may be called with the bay lock held. The resulting
404 * fuzzyness of the result if called at the wrong time is
405 * not actually a huge deal
406 */
407 bay = macio_get_drvdata(baydev);
408 if (bay == NULL)
409 return MB_NO;
410 id = bay->content_id;
411 if (bay->state != mb_up)
412 return MB_NO;
413 if (id == MB_FD1)
414 return MB_FD;
415 return id;
416}
417EXPORT_SYMBOL_GPL(check_media_bay);
418
419void lock_media_bay(struct macio_dev *baydev)
420{
421 struct media_bay_info* bay;
422
423 if (baydev == NULL)
424 return;
425 bay = macio_get_drvdata(baydev);
426 if (bay == NULL)
427 return;
428 mutex_lock(&bay->lock);
429 bay->user_lock = 1;
430}
431EXPORT_SYMBOL_GPL(lock_media_bay);
432
433void unlock_media_bay(struct macio_dev *baydev)
434{
435 struct media_bay_info* bay;
436
437 if (baydev == NULL)
438 return;
439 bay = macio_get_drvdata(baydev);
440 if (bay == NULL)
441 return;
442 if (bay->user_lock) {
443 bay->user_lock = 0;
444 mutex_unlock(&bay->lock);
445 }
446}
447EXPORT_SYMBOL_GPL(unlock_media_bay);
448
449static int mb_broadcast_hotplug(struct device *dev, void *data)
450{
451 struct media_bay_info* bay = data;
452 struct macio_dev *mdev;
453 struct macio_driver *drv;
454 int state;
455
456 if (dev->bus != &macio_bus_type)
457 return 0;
458
459 state = bay->state == mb_up ? bay->content_id : MB_NO;
460 if (state == MB_FD1)
461 state = MB_FD;
462 mdev = to_macio_device(dev);
463 drv = to_macio_driver(dev->driver);
464 if (dev->driver && drv->mediabay_event)
465 drv->mediabay_event(mdev, state);
466 return 0;
467}
468
469static void media_bay_step(int i)
470{
471 struct media_bay_info* bay = &media_bays[i];
472
473 /* We don't poll when powering down */
474 if (bay->state != mb_powering_down)
475 poll_media_bay(bay);
476
477 /* If timer expired run state machine */
478 if (bay->timer != 0) {
479 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
480 if (bay->timer > 0)
481 return;
482 bay->timer = 0;
483 }
484
485 switch(bay->state) {
486 case mb_powering_up:
487 if (bay->ops->setup_bus(bay, bay->last_value) < 0) {
488 pr_debug("mediabay%d: device not supported (kind:%d)\n",
489 i, bay->content_id);
490 set_mb_power(bay, 0);
491 break;
492 }
493 bay->timer = msecs_to_jiffies(MB_RESET_DELAY);
494 bay->state = mb_enabling_bay;
495 pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
496 break;
497 case mb_enabling_bay:
498 bay->ops->un_reset(bay);
499 bay->timer = msecs_to_jiffies(MB_SETUP_DELAY);
500 bay->state = mb_resetting;
501 pr_debug("mediabay%d: releasing bay reset (kind:%d)\n",
502 i, bay->content_id);
503 break;
504 case mb_resetting:
505 if (bay->content_id != MB_CD) {
506 pr_debug("mediabay%d: bay is up (kind:%d)\n", i,
507 bay->content_id);
508 bay->state = mb_up;
509 device_for_each_child(&bay->mdev->ofdev.dev,
510 bay, mb_broadcast_hotplug);
511 break;
512 }
513 pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n",
514 i, bay->content_id);
515 bay->ops->un_reset_ide(bay);
516 bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
517 bay->state = mb_ide_resetting;
518 break;
519
520 case mb_ide_resetting:
521 pr_debug("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
522 bay->state = mb_up;
523 device_for_each_child(&bay->mdev->ofdev.dev,
524 bay, mb_broadcast_hotplug);
525 break;
526
527 case mb_powering_down:
528 bay->state = mb_empty;
529 device_for_each_child(&bay->mdev->ofdev.dev,
530 bay, mb_broadcast_hotplug);
531 pr_debug("mediabay%d: end of power down\n", i);
532 break;
533 }
534}
535
536/*
537 * This procedure runs as a kernel thread to poll the media bay
538 * once each tick and register and unregister the IDE interface
539 * with the IDE driver. It needs to be a thread because
540 * ide_register can't be called from interrupt context.
541 */
542static int media_bay_task(void *x)
543{
544 int i;
545
546 while (!kthread_should_stop()) {
547 for (i = 0; i < media_bay_count; ++i) {
548 mutex_lock(&media_bays[i].lock);
549 if (!media_bays[i].sleeping)
550 media_bay_step(i);
551 mutex_unlock(&media_bays[i].lock);
552 }
553
554 msleep_interruptible(MB_POLL_DELAY);
555 }
556 return 0;
557}
558
559static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match)
560{
561 struct media_bay_info* bay;
562 u32 __iomem *regbase;
563 struct device_node *ofnode;
564 unsigned long base;
565 int i;
566
567 ofnode = mdev->ofdev.dev.of_node;
568
569 if (macio_resource_count(mdev) < 1)
570 return -ENODEV;
571 if (macio_request_resources(mdev, "media-bay"))
572 return -EBUSY;
573 /* Media bay registers are located at the beginning of the
574 * mac-io chip, for now, we trick and align down the first
575 * resource passed in
576 */
577 base = macio_resource_start(mdev, 0) & 0xffff0000u;
578 regbase = (u32 __iomem *)ioremap(base, 0x100);
579 if (regbase == NULL) {
580 macio_release_resources(mdev);
581 return -ENOMEM;
582 }
583
584 i = media_bay_count++;
585 bay = &media_bays[i];
586 bay->mdev = mdev;
587 bay->base = regbase;
588 bay->index = i;
589 bay->ops = match->data;
590 bay->sleeping = 0;
591 mutex_init(&bay->lock);
592
593 /* Init HW probing */
594 if (bay->ops->init)
595 bay->ops->init(bay);
596
597 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
598
599 /* Force an immediate detect */
600 set_mb_power(bay, 0);
601 msleep(MB_POWER_DELAY);
602 bay->content_id = MB_NO;
603 bay->last_value = bay->ops->content(bay);
604 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
605 bay->state = mb_empty;
606
607 /* Mark us ready by filling our mdev data */
608 macio_set_drvdata(mdev, bay);
609
610 /* Startup kernel thread */
611 if (i == 0)
612 kthread_run(media_bay_task, NULL, "media-bay");
613
614 return 0;
615
616}
617
618static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
619{
620 struct media_bay_info *bay = macio_get_drvdata(mdev);
621
622 if (state.event != mdev->ofdev.dev.power.power_state.event
623 && (state.event & PM_EVENT_SLEEP)) {
624 mutex_lock(&bay->lock);
625 bay->sleeping = 1;
626 set_mb_power(bay, 0);
627 mutex_unlock(&bay->lock);
628 msleep(MB_POLL_DELAY);
629 mdev->ofdev.dev.power.power_state = state;
630 }
631 return 0;
632}
633
634static int media_bay_resume(struct macio_dev *mdev)
635{
636 struct media_bay_info *bay = macio_get_drvdata(mdev);
637
638 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
639 mdev->ofdev.dev.power.power_state = PMSG_ON;
640
641 /* We re-enable the bay using it's previous content
642 only if it did not change. Note those bozo timings,
643 they seem to help the 3400 get it right.
644 */
645 /* Force MB power to 0 */
646 mutex_lock(&bay->lock);
647 set_mb_power(bay, 0);
648 msleep(MB_POWER_DELAY);
649 if (bay->ops->content(bay) != bay->content_id) {
650 printk("mediabay%d: Content changed during sleep...\n", bay->index);
651 mutex_unlock(&bay->lock);
652 return 0;
653 }
654 set_mb_power(bay, 1);
655 bay->last_value = bay->content_id;
656 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
657 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
658 do {
659 msleep(MB_POLL_DELAY);
660 media_bay_step(bay->index);
661 } while((bay->state != mb_empty) &&
662 (bay->state != mb_up));
663 bay->sleeping = 0;
664 mutex_unlock(&bay->lock);
665 }
666 return 0;
667}
668
669
670/* Definitions of "ops" structures.
671 */
672static struct mb_ops ohare_mb_ops = {
673 .name = "Ohare",
674 .content = ohare_mb_content,
675 .power = ohare_mb_power,
676 .setup_bus = ohare_mb_setup_bus,
677 .un_reset = ohare_mb_un_reset,
678 .un_reset_ide = ohare_mb_un_reset_ide,
679};
680
681static struct mb_ops heathrow_mb_ops = {
682 .name = "Heathrow",
683 .content = heathrow_mb_content,
684 .power = heathrow_mb_power,
685 .setup_bus = heathrow_mb_setup_bus,
686 .un_reset = heathrow_mb_un_reset,
687 .un_reset_ide = heathrow_mb_un_reset_ide,
688};
689
690static struct mb_ops keylargo_mb_ops = {
691 .name = "KeyLargo",
692 .init = keylargo_mb_init,
693 .content = keylargo_mb_content,
694 .power = keylargo_mb_power,
695 .setup_bus = keylargo_mb_setup_bus,
696 .un_reset = keylargo_mb_un_reset,
697 .un_reset_ide = keylargo_mb_un_reset_ide,
698};
699
700/*
701 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
702 * register is always set when there is something in the media bay.
703 * This causes problems for the interrupt code if we attach an interrupt
704 * handler to the media-bay interrupt, because it tends to go into
705 * an infinite loop calling the media bay interrupt handler.
706 * Therefore we do it all by polling the media bay once each tick.
707 */
708
709static struct of_device_id media_bay_match[] =
710{
711 {
712 .name = "media-bay",
713 .compatible = "keylargo-media-bay",
714 .data = &keylargo_mb_ops,
715 },
716 {
717 .name = "media-bay",
718 .compatible = "heathrow-media-bay",
719 .data = &heathrow_mb_ops,
720 },
721 {
722 .name = "media-bay",
723 .compatible = "ohare-media-bay",
724 .data = &ohare_mb_ops,
725 },
726 {},
727};
728
729static struct macio_driver media_bay_driver =
730{
731 .driver = {
732 .name = "media-bay",
733 .of_match_table = media_bay_match,
734 },
735 .probe = media_bay_attach,
736 .suspend = media_bay_suspend,
737 .resume = media_bay_resume
738};
739
740static int __init media_bay_init(void)
741{
742 int i;
743
744 for (i=0; i<MAX_BAYS; i++) {
745 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
746 media_bays[i].content_id = -1;
747 }
748 if (!machine_is(powermac))
749 return 0;
750
751 macio_register_driver(&media_bay_driver);
752
753 return 0;
754}
755
756device_initcall(media_bay_init);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Driver for the media bay on the PowerBook 3400 and 2400.
4 *
5 * Copyright (C) 1998 Paul Mackerras.
6 *
7 * Various evolutions by Benjamin Herrenschmidt & Henry Worth
8 */
9#include <linux/types.h>
10#include <linux/errno.h>
11#include <linux/kernel.h>
12#include <linux/delay.h>
13#include <linux/sched.h>
14#include <linux/timer.h>
15#include <linux/stddef.h>
16#include <linux/init.h>
17#include <linux/kthread.h>
18#include <linux/mutex.h>
19#include <asm/prom.h>
20#include <asm/pgtable.h>
21#include <asm/io.h>
22#include <asm/machdep.h>
23#include <asm/pmac_feature.h>
24#include <asm/mediabay.h>
25#include <asm/sections.h>
26#include <asm/ohare.h>
27#include <asm/heathrow.h>
28#include <asm/keylargo.h>
29#include <linux/adb.h>
30#include <linux/pmu.h>
31
32#define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2))
33#define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r))
34
35#define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r)))
36#define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v)))
37#define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v)))
38#define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v)))
39#define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r)))
40#define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v)))
41
42struct media_bay_info;
43
44struct mb_ops {
45 char* name;
46 void (*init)(struct media_bay_info *bay);
47 u8 (*content)(struct media_bay_info *bay);
48 void (*power)(struct media_bay_info *bay, int on_off);
49 int (*setup_bus)(struct media_bay_info *bay, u8 device_id);
50 void (*un_reset)(struct media_bay_info *bay);
51 void (*un_reset_ide)(struct media_bay_info *bay);
52};
53
54struct media_bay_info {
55 u32 __iomem *base;
56 int content_id;
57 int state;
58 int last_value;
59 int value_count;
60 int timer;
61 struct macio_dev *mdev;
62 const struct mb_ops* ops;
63 int index;
64 int cached_gpio;
65 int sleeping;
66 int user_lock;
67 struct mutex lock;
68};
69
70#define MAX_BAYS 2
71
72static struct media_bay_info media_bays[MAX_BAYS];
73static int media_bay_count = 0;
74
75/*
76 * Wait that number of ms between each step in normal polling mode
77 */
78#define MB_POLL_DELAY 25
79
80/*
81 * Consider the media-bay ID value stable if it is the same for
82 * this number of milliseconds
83 */
84#define MB_STABLE_DELAY 100
85
86/* Wait after powering up the media bay this delay in ms
87 * timeout bumped for some powerbooks
88 */
89#define MB_POWER_DELAY 200
90
91/*
92 * Hold the media-bay reset signal true for this many ticks
93 * after a device is inserted before releasing it.
94 */
95#define MB_RESET_DELAY 50
96
97/*
98 * Wait this long after the reset signal is released and before doing
99 * further operations. After this delay, the IDE reset signal is released
100 * too for an IDE device
101 */
102#define MB_SETUP_DELAY 100
103
104/*
105 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
106 * (or until the device is ready) before calling into the driver
107 */
108#define MB_IDE_WAIT 1000
109
110/*
111 * States of a media bay
112 */
113enum {
114 mb_empty = 0, /* Idle */
115 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */
116 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */
117 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */
118 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */
119 mb_up, /* Media bay full */
120 mb_powering_down /* Powering down (avoid too fast down/up) */
121};
122
123#define MB_POWER_SOUND 0x08
124#define MB_POWER_FLOPPY 0x04
125#define MB_POWER_ATA 0x02
126#define MB_POWER_PCI 0x01
127#define MB_POWER_OFF 0x00
128
129/*
130 * Functions for polling content of media bay
131 */
132
133static u8
134ohare_mb_content(struct media_bay_info *bay)
135{
136 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
137}
138
139static u8
140heathrow_mb_content(struct media_bay_info *bay)
141{
142 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
143}
144
145static u8
146keylargo_mb_content(struct media_bay_info *bay)
147{
148 int new_gpio;
149
150 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA;
151 if (new_gpio) {
152 bay->cached_gpio = new_gpio;
153 return MB_NO;
154 } else if (bay->cached_gpio != new_gpio) {
155 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
156 (void)MB_IN32(bay, KEYLARGO_MBCR);
157 udelay(5);
158 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
159 (void)MB_IN32(bay, KEYLARGO_MBCR);
160 udelay(5);
161 bay->cached_gpio = new_gpio;
162 }
163 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7;
164}
165
166/*
167 * Functions for powering up/down the bay, puts the bay device
168 * into reset state as well
169 */
170
171static void
172ohare_mb_power(struct media_bay_info* bay, int on_off)
173{
174 if (on_off) {
175 /* Power up device, assert it's reset line */
176 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
177 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
178 } else {
179 /* Disable all devices */
180 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
181 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
182 /* Cut power from bay, release reset line */
183 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N);
184 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
185 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
186 }
187 MB_BIC(bay, OHARE_MBCR, 0x00000F00);
188}
189
190static void
191heathrow_mb_power(struct media_bay_info* bay, int on_off)
192{
193 if (on_off) {
194 /* Power up device, assert it's reset line */
195 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
196 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
197 } else {
198 /* Disable all devices */
199 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
200 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
201 /* Cut power from bay, release reset line */
202 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
203 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
204 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
205 }
206 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
207}
208
209static void
210keylargo_mb_power(struct media_bay_info* bay, int on_off)
211{
212 if (on_off) {
213 /* Power up device, assert it's reset line */
214 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
215 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
216 } else {
217 /* Disable all devices */
218 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
219 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
220 /* Cut power from bay, release reset line */
221 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
222 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
223 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
224 }
225 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
226}
227
228/*
229 * Functions for configuring the media bay for a given type of device,
230 * enable the related busses
231 */
232
233static int
234ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
235{
236 switch(device_id) {
237 case MB_FD:
238 case MB_FD1:
239 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
240 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
241 return 0;
242 case MB_CD:
243 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
244 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
245 return 0;
246 case MB_PCI:
247 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
248 return 0;
249 }
250 return -ENODEV;
251}
252
253static int
254heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
255{
256 switch(device_id) {
257 case MB_FD:
258 case MB_FD1:
259 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
260 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
261 return 0;
262 case MB_CD:
263 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
264 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
265 return 0;
266 case MB_PCI:
267 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
268 return 0;
269 }
270 return -ENODEV;
271}
272
273static int
274keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
275{
276 switch(device_id) {
277 case MB_CD:
278 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
279 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
280 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
281 return 0;
282 case MB_PCI:
283 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
284 return 0;
285 case MB_SOUND:
286 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
287 return 0;
288 }
289 return -ENODEV;
290}
291
292/*
293 * Functions for tweaking resets
294 */
295
296static void
297ohare_mb_un_reset(struct media_bay_info* bay)
298{
299 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
300}
301
302static void keylargo_mb_init(struct media_bay_info *bay)
303{
304 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
305}
306
307static void heathrow_mb_un_reset(struct media_bay_info* bay)
308{
309 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
310}
311
312static void keylargo_mb_un_reset(struct media_bay_info* bay)
313{
314 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
315}
316
317static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
318{
319 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
320}
321
322static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
323{
324 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
325}
326
327static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
328{
329 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
330}
331
332static inline void set_mb_power(struct media_bay_info* bay, int onoff)
333{
334 /* Power up up and assert the bay reset line */
335 if (onoff) {
336 bay->ops->power(bay, 1);
337 bay->state = mb_powering_up;
338 pr_debug("mediabay%d: powering up\n", bay->index);
339 } else {
340 /* Make sure everything is powered down & disabled */
341 bay->ops->power(bay, 0);
342 bay->state = mb_powering_down;
343 pr_debug("mediabay%d: powering down\n", bay->index);
344 }
345 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
346}
347
348static void poll_media_bay(struct media_bay_info* bay)
349{
350 int id = bay->ops->content(bay);
351
352 static char *mb_content_types[] = {
353 "a floppy drive",
354 "a floppy drive",
355 "an unsupported audio device",
356 "an ATA device",
357 "an unsupported PCI device",
358 "an unknown device",
359 };
360
361 if (id != bay->last_value) {
362 bay->last_value = id;
363 bay->value_count = 0;
364 return;
365 }
366 if (id == bay->content_id)
367 return;
368
369 bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);
370 if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {
371 /* If the device type changes without going thru
372 * "MB_NO", we force a pass by "MB_NO" to make sure
373 * things are properly reset
374 */
375 if ((id != MB_NO) && (bay->content_id != MB_NO)) {
376 id = MB_NO;
377 pr_debug("mediabay%d: forcing MB_NO\n", bay->index);
378 }
379 pr_debug("mediabay%d: switching to %d\n", bay->index, id);
380 set_mb_power(bay, id != MB_NO);
381 bay->content_id = id;
382 if (id >= MB_NO || id < 0)
383 printk(KERN_INFO "mediabay%d: Bay is now empty\n", bay->index);
384 else
385 printk(KERN_INFO "mediabay%d: Bay contains %s\n",
386 bay->index, mb_content_types[id]);
387 }
388}
389
390int check_media_bay(struct macio_dev *baydev)
391{
392 struct media_bay_info* bay;
393 int id;
394
395 if (baydev == NULL)
396 return MB_NO;
397
398 /* This returns an instant snapshot, not locking, sine
399 * we may be called with the bay lock held. The resulting
400 * fuzzyness of the result if called at the wrong time is
401 * not actually a huge deal
402 */
403 bay = macio_get_drvdata(baydev);
404 if (bay == NULL)
405 return MB_NO;
406 id = bay->content_id;
407 if (bay->state != mb_up)
408 return MB_NO;
409 if (id == MB_FD1)
410 return MB_FD;
411 return id;
412}
413EXPORT_SYMBOL_GPL(check_media_bay);
414
415void lock_media_bay(struct macio_dev *baydev)
416{
417 struct media_bay_info* bay;
418
419 if (baydev == NULL)
420 return;
421 bay = macio_get_drvdata(baydev);
422 if (bay == NULL)
423 return;
424 mutex_lock(&bay->lock);
425 bay->user_lock = 1;
426}
427EXPORT_SYMBOL_GPL(lock_media_bay);
428
429void unlock_media_bay(struct macio_dev *baydev)
430{
431 struct media_bay_info* bay;
432
433 if (baydev == NULL)
434 return;
435 bay = macio_get_drvdata(baydev);
436 if (bay == NULL)
437 return;
438 if (bay->user_lock) {
439 bay->user_lock = 0;
440 mutex_unlock(&bay->lock);
441 }
442}
443EXPORT_SYMBOL_GPL(unlock_media_bay);
444
445static int mb_broadcast_hotplug(struct device *dev, void *data)
446{
447 struct media_bay_info* bay = data;
448 struct macio_dev *mdev;
449 struct macio_driver *drv;
450 int state;
451
452 if (dev->bus != &macio_bus_type)
453 return 0;
454
455 state = bay->state == mb_up ? bay->content_id : MB_NO;
456 if (state == MB_FD1)
457 state = MB_FD;
458 mdev = to_macio_device(dev);
459 drv = to_macio_driver(dev->driver);
460 if (dev->driver && drv->mediabay_event)
461 drv->mediabay_event(mdev, state);
462 return 0;
463}
464
465static void media_bay_step(int i)
466{
467 struct media_bay_info* bay = &media_bays[i];
468
469 /* We don't poll when powering down */
470 if (bay->state != mb_powering_down)
471 poll_media_bay(bay);
472
473 /* If timer expired run state machine */
474 if (bay->timer != 0) {
475 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
476 if (bay->timer > 0)
477 return;
478 bay->timer = 0;
479 }
480
481 switch(bay->state) {
482 case mb_powering_up:
483 if (bay->ops->setup_bus(bay, bay->last_value) < 0) {
484 pr_debug("mediabay%d: device not supported (kind:%d)\n",
485 i, bay->content_id);
486 set_mb_power(bay, 0);
487 break;
488 }
489 bay->timer = msecs_to_jiffies(MB_RESET_DELAY);
490 bay->state = mb_enabling_bay;
491 pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
492 break;
493 case mb_enabling_bay:
494 bay->ops->un_reset(bay);
495 bay->timer = msecs_to_jiffies(MB_SETUP_DELAY);
496 bay->state = mb_resetting;
497 pr_debug("mediabay%d: releasing bay reset (kind:%d)\n",
498 i, bay->content_id);
499 break;
500 case mb_resetting:
501 if (bay->content_id != MB_CD) {
502 pr_debug("mediabay%d: bay is up (kind:%d)\n", i,
503 bay->content_id);
504 bay->state = mb_up;
505 device_for_each_child(&bay->mdev->ofdev.dev,
506 bay, mb_broadcast_hotplug);
507 break;
508 }
509 pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n",
510 i, bay->content_id);
511 bay->ops->un_reset_ide(bay);
512 bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
513 bay->state = mb_ide_resetting;
514 break;
515
516 case mb_ide_resetting:
517 pr_debug("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
518 bay->state = mb_up;
519 device_for_each_child(&bay->mdev->ofdev.dev,
520 bay, mb_broadcast_hotplug);
521 break;
522
523 case mb_powering_down:
524 bay->state = mb_empty;
525 device_for_each_child(&bay->mdev->ofdev.dev,
526 bay, mb_broadcast_hotplug);
527 pr_debug("mediabay%d: end of power down\n", i);
528 break;
529 }
530}
531
532/*
533 * This procedure runs as a kernel thread to poll the media bay
534 * once each tick and register and unregister the IDE interface
535 * with the IDE driver. It needs to be a thread because
536 * ide_register can't be called from interrupt context.
537 */
538static int media_bay_task(void *x)
539{
540 int i;
541
542 while (!kthread_should_stop()) {
543 for (i = 0; i < media_bay_count; ++i) {
544 mutex_lock(&media_bays[i].lock);
545 if (!media_bays[i].sleeping)
546 media_bay_step(i);
547 mutex_unlock(&media_bays[i].lock);
548 }
549
550 msleep_interruptible(MB_POLL_DELAY);
551 }
552 return 0;
553}
554
555static int media_bay_attach(struct macio_dev *mdev,
556 const struct of_device_id *match)
557{
558 struct media_bay_info* bay;
559 u32 __iomem *regbase;
560 struct device_node *ofnode;
561 unsigned long base;
562 int i;
563
564 ofnode = mdev->ofdev.dev.of_node;
565
566 if (macio_resource_count(mdev) < 1)
567 return -ENODEV;
568 if (macio_request_resources(mdev, "media-bay"))
569 return -EBUSY;
570 /* Media bay registers are located at the beginning of the
571 * mac-io chip, for now, we trick and align down the first
572 * resource passed in
573 */
574 base = macio_resource_start(mdev, 0) & 0xffff0000u;
575 regbase = (u32 __iomem *)ioremap(base, 0x100);
576 if (regbase == NULL) {
577 macio_release_resources(mdev);
578 return -ENOMEM;
579 }
580
581 i = media_bay_count++;
582 bay = &media_bays[i];
583 bay->mdev = mdev;
584 bay->base = regbase;
585 bay->index = i;
586 bay->ops = match->data;
587 bay->sleeping = 0;
588 mutex_init(&bay->lock);
589
590 /* Init HW probing */
591 if (bay->ops->init)
592 bay->ops->init(bay);
593
594 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
595
596 /* Force an immediate detect */
597 set_mb_power(bay, 0);
598 msleep(MB_POWER_DELAY);
599 bay->content_id = MB_NO;
600 bay->last_value = bay->ops->content(bay);
601 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
602 bay->state = mb_empty;
603
604 /* Mark us ready by filling our mdev data */
605 macio_set_drvdata(mdev, bay);
606
607 /* Startup kernel thread */
608 if (i == 0)
609 kthread_run(media_bay_task, NULL, "media-bay");
610
611 return 0;
612
613}
614
615static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
616{
617 struct media_bay_info *bay = macio_get_drvdata(mdev);
618
619 if (state.event != mdev->ofdev.dev.power.power_state.event
620 && (state.event & PM_EVENT_SLEEP)) {
621 mutex_lock(&bay->lock);
622 bay->sleeping = 1;
623 set_mb_power(bay, 0);
624 mutex_unlock(&bay->lock);
625 msleep(MB_POLL_DELAY);
626 mdev->ofdev.dev.power.power_state = state;
627 }
628 return 0;
629}
630
631static int media_bay_resume(struct macio_dev *mdev)
632{
633 struct media_bay_info *bay = macio_get_drvdata(mdev);
634
635 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
636 mdev->ofdev.dev.power.power_state = PMSG_ON;
637
638 /* We re-enable the bay using it's previous content
639 only if it did not change. Note those bozo timings,
640 they seem to help the 3400 get it right.
641 */
642 /* Force MB power to 0 */
643 mutex_lock(&bay->lock);
644 set_mb_power(bay, 0);
645 msleep(MB_POWER_DELAY);
646 if (bay->ops->content(bay) != bay->content_id) {
647 printk("mediabay%d: Content changed during sleep...\n", bay->index);
648 mutex_unlock(&bay->lock);
649 return 0;
650 }
651 set_mb_power(bay, 1);
652 bay->last_value = bay->content_id;
653 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
654 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
655 do {
656 msleep(MB_POLL_DELAY);
657 media_bay_step(bay->index);
658 } while((bay->state != mb_empty) &&
659 (bay->state != mb_up));
660 bay->sleeping = 0;
661 mutex_unlock(&bay->lock);
662 }
663 return 0;
664}
665
666
667/* Definitions of "ops" structures.
668 */
669static const struct mb_ops ohare_mb_ops = {
670 .name = "Ohare",
671 .content = ohare_mb_content,
672 .power = ohare_mb_power,
673 .setup_bus = ohare_mb_setup_bus,
674 .un_reset = ohare_mb_un_reset,
675 .un_reset_ide = ohare_mb_un_reset_ide,
676};
677
678static const struct mb_ops heathrow_mb_ops = {
679 .name = "Heathrow",
680 .content = heathrow_mb_content,
681 .power = heathrow_mb_power,
682 .setup_bus = heathrow_mb_setup_bus,
683 .un_reset = heathrow_mb_un_reset,
684 .un_reset_ide = heathrow_mb_un_reset_ide,
685};
686
687static const struct mb_ops keylargo_mb_ops = {
688 .name = "KeyLargo",
689 .init = keylargo_mb_init,
690 .content = keylargo_mb_content,
691 .power = keylargo_mb_power,
692 .setup_bus = keylargo_mb_setup_bus,
693 .un_reset = keylargo_mb_un_reset,
694 .un_reset_ide = keylargo_mb_un_reset_ide,
695};
696
697/*
698 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
699 * register is always set when there is something in the media bay.
700 * This causes problems for the interrupt code if we attach an interrupt
701 * handler to the media-bay interrupt, because it tends to go into
702 * an infinite loop calling the media bay interrupt handler.
703 * Therefore we do it all by polling the media bay once each tick.
704 */
705
706static struct of_device_id media_bay_match[] =
707{
708 {
709 .name = "media-bay",
710 .compatible = "keylargo-media-bay",
711 .data = &keylargo_mb_ops,
712 },
713 {
714 .name = "media-bay",
715 .compatible = "heathrow-media-bay",
716 .data = &heathrow_mb_ops,
717 },
718 {
719 .name = "media-bay",
720 .compatible = "ohare-media-bay",
721 .data = &ohare_mb_ops,
722 },
723 {},
724};
725
726static struct macio_driver media_bay_driver =
727{
728 .driver = {
729 .name = "media-bay",
730 .of_match_table = media_bay_match,
731 },
732 .probe = media_bay_attach,
733 .suspend = media_bay_suspend,
734 .resume = media_bay_resume
735};
736
737static int __init media_bay_init(void)
738{
739 int i;
740
741 for (i=0; i<MAX_BAYS; i++) {
742 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
743 media_bays[i].content_id = -1;
744 }
745 if (!machine_is(powermac))
746 return 0;
747
748 macio_register_driver(&media_bay_driver);
749
750 return 0;
751}
752
753device_initcall(media_bay_init);