]> bbs.cooldavid.org Git - net-next-2.6.git/blame - drivers/macintosh/mediabay.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ipv6: AF_INET6 link address family
[net-next-2.6.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>
33f6e794 21#include <linux/kthread.h>
9a24729d 22#include <linux/mutex.h>
1da177e4
LT		 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
1da177e4
LT		 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;
d58b0c39 70 int user_lock;
9a24729d 71 struct mutex lock;
1da177e4
LT		 72};
73
74#define MAX_BAYS 2
75
76static struct media_bay_info media_bays[MAX_BAYS];
d58b0c39 77static int media_bay_count = 0;
1da177e4
LT		 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
d58b0c39 110 * (or until the device is ready) before calling into the driver
1da177e4
LT		 111 */
112#define MB_IDE_WAIT 1000
113
1da177e4
LT		 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 */
1da177e4
LT		 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
aacaf9bd 137static u8
1da177e4
LT		 138ohare_mb_content(struct media_bay_info *bay)
139{
140 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
141}
142
aacaf9bd 143static u8
1da177e4
LT		 144heathrow_mb_content(struct media_bay_info *bay)
145{
146 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
147}
148
aacaf9bd 149static u8
1da177e4
LT		 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
aacaf9bd 175static void
1da177e4
LT		 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
aacaf9bd 194static void
1da177e4
LT		 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
aacaf9bd 213static void
1da177e4
LT		 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
aacaf9bd 237static int
1da177e4
LT		 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
aacaf9bd 257static int
1da177e4
LT		 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
aacaf9bd 277static int
1da177e4
LT		 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
aacaf9bd 300static void
1da177e4
LT		 301ohare_mb_un_reset(struct media_bay_info* bay)
302{
303 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
304}
305
aacaf9bd 306static void keylargo_mb_init(struct media_bay_info *bay)
1da177e4
LT		 307{
308 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
309}
310
aacaf9bd 311static void heathrow_mb_un_reset(struct media_bay_info* bay)
1da177e4
LT		 312{
313 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
314}
315
aacaf9bd 316static void keylargo_mb_un_reset(struct media_bay_info* bay)
1da177e4
LT		 317{
318 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
319}
320
aacaf9bd 321static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
1da177e4
LT		 322{
323 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
324}
325
aacaf9bd 326static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
1da177e4
LT		 327{
328 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
329}
330
aacaf9bd 331static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
1da177e4
LT		 332{
333 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
334}
335
aacaf9bd 336static inline void set_mb_power(struct media_bay_info* bay, int onoff)
1da177e4
LT		 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;
d58b0c39 342 pr_debug("mediabay%d: powering up\n", bay->index);
1da177e4
LT		 343 } else {
344 /* Make sure everything is powered down & disabled */
345 bay->ops->power(bay, 0);
346 bay->state = mb_powering_down;
d58b0c39 347 pr_debug("mediabay%d: powering down\n", bay->index);
1da177e4
LT		 348 }
349 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
350}
351
aacaf9bd 352static void poll_media_bay(struct media_bay_info* bay)
1da177e4
LT		 353{
354 int id = bay->ops->content(bay);
355
d58b0c39
BH		 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) {
1da177e4
LT		 366 bay->last_value = id;
367 bay->value_count = 0;
d58b0c39
BH		 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]);
1da177e4
LT		 391 }
392}
393
d58b0c39 394int check_media_bay(struct macio_dev *baydev)
1da177e4 395{
d58b0c39
BH		 396 struct media_bay_info* bay;
397 int id;
1da177e4 398
d58b0c39
BH		 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;
1da177e4 416}
d58b0c39 417EXPORT_SYMBOL_GPL(check_media_bay);
1da177e4 418
d58b0c39 419void lock_media_bay(struct macio_dev *baydev)
1da177e4 420{
d58b0c39 421 struct media_bay_info* bay;
34394e45 422
d58b0c39
BH		 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;
1da177e4 430}
d58b0c39 431EXPORT_SYMBOL_GPL(lock_media_bay);
1da177e4 432
d58b0c39 433void unlock_media_bay(struct macio_dev *baydev)
1da177e4 434{
d58b0c39 435 struct media_bay_info* bay;
1da177e4 436
d58b0c39
BH		 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);
1da177e4 445 }
d58b0c39
BH		 446}
447EXPORT_SYMBOL_GPL(unlock_media_bay);
34394e45 448
d58b0c39
BH		 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;
1da177e4
LT		 467}
468
aacaf9bd 469static void media_bay_step(int i)
1da177e4
LT		 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
d58b0c39
BH		 477 /* If timer expired run state machine */
478 if (bay->timer != 0) {
1da177e4
LT		 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) {
d58b0c39
BH		 488 pr_debug("mediabay%d: device not supported (kind:%d)\n",
489 i, bay->content_id);
1da177e4
LT		 490 set_mb_power(bay, 0);
491 break;
492 }
493 bay->timer = msecs_to_jiffies(MB_RESET_DELAY);
494 bay->state = mb_enabling_bay;
d58b0c39 495 pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
1da177e4
LT		 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;
d58b0c39
BH		 501 pr_debug("mediabay%d: releasing bay reset (kind:%d)\n",
502 i, bay->content_id);
1da177e4 503 break;
1da177e4
LT		 504 case mb_resetting:
505 if (bay->content_id != MB_CD) {
d58b0c39
BH		 506 pr_debug("mediabay%d: bay is up (kind:%d)\n", i,
507 bay->content_id);
1da177e4 508 bay->state = mb_up;
d58b0c39
BH		 509 device_for_each_child(&bay->mdev->ofdev.dev,
510 bay, mb_broadcast_hotplug);
1da177e4
LT		 511 break;
512 }
d58b0c39
BH		 513 pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n",
514 i, bay->content_id);
1da177e4
LT		 515 bay->ops->un_reset_ide(bay);
516 bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
517 bay->state = mb_ide_resetting;
1da177e4 518 break;
d58b0c39 519
1da177e4 520 case mb_ide_resetting:
d58b0c39
BH		 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);
1da177e4 525 break;
d58b0c39 526
1da177e4
LT		 527 case mb_powering_down:
528 bay->state = mb_empty;
d58b0c39
BH		 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);
1da177e4
LT		 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 */
aacaf9bd 542static int media_bay_task(void *x)
1da177e4
LT		 543{
544 int i;
545
33f6e794 546 while (!kthread_should_stop()) {
1da177e4 547 for (i = 0; i < media_bay_count; ++i) {
9a24729d 548 mutex_lock(&media_bays[i].lock);
1da177e4
LT		 549 if (!media_bays[i].sleeping)
550 media_bay_step(i);
9a24729d 551 mutex_unlock(&media_bays[i].lock);
1da177e4
LT		 552 }
553
554 msleep_interruptible(MB_POLL_DELAY);
1da177e4 555 }
33f6e794 556 return 0;
1da177e4
LT		 557}
558
5e655772 559static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match)
1da177e4
LT		 560{
561 struct media_bay_info* bay;
562 u32 __iomem *regbase;
563 struct device_node *ofnode;
cc5d0189 564 unsigned long base;
1da177e4
LT		 565 int i;
566
61c7a080 567 ofnode = mdev->ofdev.dev.of_node;
1da177e4
LT		 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
cc5d0189
BH		 574 * mac-io chip, for now, we trick and align down the first
575 * resource passed in
1da177e4 576 */
cc5d0189
BH		 577 base = macio_resource_start(mdev, 0) & 0xffff0000u;
578 regbase = (u32 __iomem *)ioremap(base, 0x100);
1da177e4
LT		 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;
9a24729d 591 mutex_init(&bay->lock);
1da177e4
LT		 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;
1da177e4
LT		 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)
33f6e794 612 kthread_run(media_bay_task, NULL, "media-bay");
1da177e4
LT		 613
614 return 0;
615
616}
617
aacaf9bd 618static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
1da177e4
LT		 619{
620 struct media_bay_info *bay = macio_get_drvdata(mdev);
621
3a2d5b70
RW		 622 if (state.event != mdev->ofdev.dev.power.power_state.event
623 && (state.event & PM_EVENT_SLEEP)) {
9a24729d 624 mutex_lock(&bay->lock);
1da177e4
LT		 625 bay->sleeping = 1;
626 set_mb_power(bay, 0);
9a24729d 627 mutex_unlock(&bay->lock);
1da177e4
LT		 628 msleep(MB_POLL_DELAY);
629 mdev->ofdev.dev.power.power_state = state;
630 }
631 return 0;
632}
633
aacaf9bd 634static int media_bay_resume(struct macio_dev *mdev)
1da177e4
LT		 635{
636 struct media_bay_info *bay = macio_get_drvdata(mdev);
637
ca078bae 638 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
829ca9a3 639 mdev->ofdev.dev.power.power_state = PMSG_ON;
1da177e4
LT		 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 */
9a24729d 646 mutex_lock(&bay->lock);
1da177e4
LT		 647 set_mb_power(bay, 0);
648 msleep(MB_POWER_DELAY);
649 if (bay->ops->content(bay) != bay->content_id) {
d58b0c39 650 printk("mediabay%d: Content changed during sleep...\n", bay->index);
9a24729d 651 mutex_unlock(&bay->lock);
1da177e4
LT		 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);
1da177e4
LT		 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;
9a24729d 664 mutex_unlock(&bay->lock);
1da177e4
LT		 665 }
666 return 0;
667}
668
669
670/* Definitions of "ops" structures.
671 */
aacaf9bd 672static struct mb_ops ohare_mb_ops = {
1da177e4
LT		 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
aacaf9bd 681static struct mb_ops heathrow_mb_ops = {
1da177e4
LT		 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
aacaf9bd 690static struct mb_ops keylargo_mb_ops = {
1da177e4
LT		 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
5e655772 709static struct of_device_id media_bay_match[] =
1da177e4
LT		 710{
711 {
712 .name = "media-bay",
1da177e4
LT		 713 .compatible = "keylargo-media-bay",
714 .data = &keylargo_mb_ops,
715 },
716 {
717 .name = "media-bay",
1da177e4
LT		 718 .compatible = "heathrow-media-bay",
719 .data = &heathrow_mb_ops,
720 },
721 {
722 .name = "media-bay",
1da177e4
LT		 723 .compatible = "ohare-media-bay",
724 .data = &ohare_mb_ops,
725 },
726 {},
727};
728
729static struct macio_driver media_bay_driver =
730{
c2cdf6ab
BH		 731 .driver = {
732 .name = "media-bay",
733 .of_match_table = media_bay_match,
734 },
1da177e4
LT		 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;
1da177e4 747 }
e8222502
BH		 748 if (!machine_is(powermac))
749 return 0;
1da177e4
LT		 750
751 macio_register_driver(&media_bay_driver);
752
753 return 0;
754}
755
756device_initcall(media_bay_init);
Clone of davem's net-next-2.6 tree