ia64/linux-2.6.18-xen.hg

view drivers/macintosh/mediabay.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
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/hdreg.h>
20 #include <linux/stddef.h>
21 #include <linux/init.h>
22 #include <linux/ide.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>
37 #define MB_DEBUG
38 #define MB_IGNORE_SIGNALS
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
46 #define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2))
47 #define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r))
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)))
56 struct media_bay_info;
58 struct 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 };
68 struct 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;
80 struct semaphore lock;
81 #ifdef CONFIG_BLK_DEV_IDE
82 void __iomem *cd_base;
83 int cd_index;
84 int cd_irq;
85 int cd_retry;
86 #endif
87 };
89 #define MAX_BAYS 2
91 static struct media_bay_info media_bays[MAX_BAYS];
92 int media_bay_count = 0;
94 #ifdef CONFIG_BLK_DEV_IDE
95 /* check the busy bit in the media-bay ide interface
96 (assumes the media-bay contains an ide device) */
97 #define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0)
98 #endif
100 /*
101 * Wait that number of ms between each step in normal polling mode
102 */
103 #define MB_POLL_DELAY 25
105 /*
106 * Consider the media-bay ID value stable if it is the same for
107 * this number of milliseconds
108 */
109 #define MB_STABLE_DELAY 100
111 /* Wait after powering up the media bay this delay in ms
112 * timeout bumped for some powerbooks
113 */
114 #define MB_POWER_DELAY 200
116 /*
117 * Hold the media-bay reset signal true for this many ticks
118 * after a device is inserted before releasing it.
119 */
120 #define MB_RESET_DELAY 50
122 /*
123 * Wait this long after the reset signal is released and before doing
124 * further operations. After this delay, the IDE reset signal is released
125 * too for an IDE device
126 */
127 #define MB_SETUP_DELAY 100
129 /*
130 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
131 * (or until the device is ready) before waiting for busy bit to disappear
132 */
133 #define MB_IDE_WAIT 1000
135 /*
136 * Timeout waiting for busy bit of an IDE device to go down
137 */
138 #define MB_IDE_TIMEOUT 5000
140 /*
141 * Max retries of the full power up/down sequence for an IDE device
142 */
143 #define MAX_CD_RETRIES 3
145 /*
146 * States of a media bay
147 */
148 enum {
149 mb_empty = 0, /* Idle */
150 mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */
151 mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */
152 mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */
153 mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */
154 mb_ide_waiting, /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */
155 mb_up, /* Media bay full */
156 mb_powering_down /* Powering down (avoid too fast down/up) */
157 };
159 #define MB_POWER_SOUND 0x08
160 #define MB_POWER_FLOPPY 0x04
161 #define MB_POWER_ATA 0x02
162 #define MB_POWER_PCI 0x01
163 #define MB_POWER_OFF 0x00
165 /*
166 * Functions for polling content of media bay
167 */
169 static u8
170 ohare_mb_content(struct media_bay_info *bay)
171 {
172 return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
173 }
175 static u8
176 heathrow_mb_content(struct media_bay_info *bay)
177 {
178 return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
179 }
181 static u8
182 keylargo_mb_content(struct media_bay_info *bay)
183 {
184 int new_gpio;
186 new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA;
187 if (new_gpio) {
188 bay->cached_gpio = new_gpio;
189 return MB_NO;
190 } else if (bay->cached_gpio != new_gpio) {
191 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
192 (void)MB_IN32(bay, KEYLARGO_MBCR);
193 udelay(5);
194 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
195 (void)MB_IN32(bay, KEYLARGO_MBCR);
196 udelay(5);
197 bay->cached_gpio = new_gpio;
198 }
199 return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7;
200 }
202 /*
203 * Functions for powering up/down the bay, puts the bay device
204 * into reset state as well
205 */
207 static void
208 ohare_mb_power(struct media_bay_info* bay, int on_off)
209 {
210 if (on_off) {
211 /* Power up device, assert it's reset line */
212 MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
213 MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
214 } else {
215 /* Disable all devices */
216 MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
217 MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
218 /* Cut power from bay, release reset line */
219 MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N);
220 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
221 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
222 }
223 MB_BIC(bay, OHARE_MBCR, 0x00000F00);
224 }
226 static void
227 heathrow_mb_power(struct media_bay_info* bay, int on_off)
228 {
229 if (on_off) {
230 /* Power up device, assert it's reset line */
231 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
232 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
233 } else {
234 /* Disable all devices */
235 MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
236 MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
237 /* Cut power from bay, release reset line */
238 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
239 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
240 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
241 }
242 MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
243 }
245 static void
246 keylargo_mb_power(struct media_bay_info* bay, int on_off)
247 {
248 if (on_off) {
249 /* Power up device, assert it's reset line */
250 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
251 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
252 } else {
253 /* Disable all devices */
254 MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
255 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
256 /* Cut power from bay, release reset line */
257 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
258 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
259 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
260 }
261 MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
262 }
264 /*
265 * Functions for configuring the media bay for a given type of device,
266 * enable the related busses
267 */
269 static int
270 ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
271 {
272 switch(device_id) {
273 case MB_FD:
274 case MB_FD1:
275 MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
276 MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
277 return 0;
278 case MB_CD:
279 MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
280 MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
281 return 0;
282 case MB_PCI:
283 MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
284 return 0;
285 }
286 return -ENODEV;
287 }
289 static int
290 heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
291 {
292 switch(device_id) {
293 case MB_FD:
294 case MB_FD1:
295 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
296 MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
297 return 0;
298 case MB_CD:
299 MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
300 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
301 return 0;
302 case MB_PCI:
303 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
304 return 0;
305 }
306 return -ENODEV;
307 }
309 static int
310 keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
311 {
312 switch(device_id) {
313 case MB_CD:
314 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
315 MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
316 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
317 return 0;
318 case MB_PCI:
319 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
320 return 0;
321 case MB_SOUND:
322 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
323 return 0;
324 }
325 return -ENODEV;
326 }
328 /*
329 * Functions for tweaking resets
330 */
332 static void
333 ohare_mb_un_reset(struct media_bay_info* bay)
334 {
335 MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
336 }
338 static void keylargo_mb_init(struct media_bay_info *bay)
339 {
340 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
341 }
343 static void heathrow_mb_un_reset(struct media_bay_info* bay)
344 {
345 MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
346 }
348 static void keylargo_mb_un_reset(struct media_bay_info* bay)
349 {
350 MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
351 }
353 static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
354 {
355 MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
356 }
358 static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
359 {
360 MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
361 }
363 static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
364 {
365 MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
366 }
368 static inline void set_mb_power(struct media_bay_info* bay, int onoff)
369 {
370 /* Power up up and assert the bay reset line */
371 if (onoff) {
372 bay->ops->power(bay, 1);
373 bay->state = mb_powering_up;
374 MBDBG("mediabay%d: powering up\n", bay->index);
375 } else {
376 /* Make sure everything is powered down & disabled */
377 bay->ops->power(bay, 0);
378 bay->state = mb_powering_down;
379 MBDBG("mediabay%d: powering down\n", bay->index);
380 }
381 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
382 }
384 static void poll_media_bay(struct media_bay_info* bay)
385 {
386 int id = bay->ops->content(bay);
388 if (id == bay->last_value) {
389 if (id != bay->content_id) {
390 bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);
391 if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {
392 /* If the device type changes without going thru
393 * "MB_NO", we force a pass by "MB_NO" to make sure
394 * things are properly reset
395 */
396 if ((id != MB_NO) && (bay->content_id != MB_NO)) {
397 id = MB_NO;
398 MBDBG("mediabay%d: forcing MB_NO\n", bay->index);
399 }
400 MBDBG("mediabay%d: switching to %d\n", bay->index, id);
401 set_mb_power(bay, id != MB_NO);
402 bay->content_id = id;
403 if (id == MB_NO) {
404 #ifdef CONFIG_BLK_DEV_IDE
405 bay->cd_retry = 0;
406 #endif
407 printk(KERN_INFO "media bay %d is empty\n", bay->index);
408 }
409 }
410 }
411 } else {
412 bay->last_value = id;
413 bay->value_count = 0;
414 }
415 }
417 int check_media_bay(struct device_node *which_bay, int what)
418 {
419 #ifdef CONFIG_BLK_DEV_IDE
420 int i;
422 for (i=0; i<media_bay_count; i++)
423 if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) {
424 if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
425 return 0;
426 media_bays[i].cd_index = -1;
427 return -EINVAL;
428 }
429 #endif /* CONFIG_BLK_DEV_IDE */
430 return -ENODEV;
431 }
432 EXPORT_SYMBOL(check_media_bay);
434 int check_media_bay_by_base(unsigned long base, int what)
435 {
436 #ifdef CONFIG_BLK_DEV_IDE
437 int i;
439 for (i=0; i<media_bay_count; i++)
440 if (media_bays[i].mdev && base == (unsigned long) media_bays[i].cd_base) {
441 if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
442 return 0;
443 media_bays[i].cd_index = -1;
444 return -EINVAL;
445 }
446 #endif
448 return -ENODEV;
449 }
451 int media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base,
452 int irq, int index)
453 {
454 #ifdef CONFIG_BLK_DEV_IDE
455 int i;
457 for (i=0; i<media_bay_count; i++) {
458 struct media_bay_info* bay = &media_bays[i];
460 if (bay->mdev && which_bay == bay->mdev->ofdev.node) {
461 int timeout = 5000;
463 down(&bay->lock);
465 bay->cd_base = (void __iomem *) base;
466 bay->cd_irq = irq;
468 if ((MB_CD != bay->content_id) || bay->state != mb_up) {
469 up(&bay->lock);
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;
476 up(&bay->lock);
477 return 0;
478 }
479 mdelay(1);
480 } while(--timeout);
481 printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i);
482 up(&bay->lock);
483 return -ENODEV;
484 }
485 }
486 #endif /* CONFIG_BLK_DEV_IDE */
488 return -ENODEV;
489 }
491 static void media_bay_step(int i)
492 {
493 struct media_bay_info* bay = &media_bays[i];
495 /* We don't poll when powering down */
496 if (bay->state != mb_powering_down)
497 poll_media_bay(bay);
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 }
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;
525 case mb_resetting:
526 if (bay->content_id != MB_CD) {
527 MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
528 bay->state = mb_up;
529 break;
530 }
531 #ifdef CONFIG_BLK_DEV_IDE
532 MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id);
533 bay->ops->un_reset_ide(bay);
534 bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
535 bay->state = mb_ide_resetting;
536 #else
537 printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i);
538 set_mb_power(bay, 0);
539 #endif /* CONFIG_BLK_DEV_IDE */
540 break;
542 #ifdef CONFIG_BLK_DEV_IDE
543 case mb_ide_resetting:
544 bay->timer = msecs_to_jiffies(MB_IDE_TIMEOUT);
545 bay->state = mb_ide_waiting;
546 MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id);
547 break;
549 case mb_ide_waiting:
550 if (bay->cd_base == NULL) {
551 bay->timer = 0;
552 bay->state = mb_up;
553 MBDBG("mediabay%d: up before IDE init\n", i);
554 break;
555 } else if (MB_IDE_READY(i)) {
556 bay->timer = 0;
557 bay->state = mb_up;
558 if (bay->cd_index < 0) {
559 hw_regs_t hw;
561 printk("mediabay %d, registering IDE...\n", i);
562 pmu_suspend();
563 ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL);
564 hw.irq = bay->cd_irq;
565 hw.chipset = ide_pmac;
566 bay->cd_index = ide_register_hw(&hw, NULL);
567 pmu_resume();
568 }
569 if (bay->cd_index == -1) {
570 /* We eventually do a retry */
571 bay->cd_retry++;
572 printk("IDE register error\n");
573 set_mb_power(bay, 0);
574 } else {
575 printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index);
576 MBDBG("mediabay %d IDE ready\n", i);
577 }
578 break;
579 } else if (bay->timer > 0)
580 bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
581 if (bay->timer <= 0) {
582 printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n",
583 i, readb(bay->cd_base + 0x70));
584 MBDBG("mediabay%d: nIDE Timeout !\n", i);
585 set_mb_power(bay, 0);
586 bay->timer = 0;
587 }
588 break;
589 #endif /* CONFIG_BLK_DEV_IDE */
591 case mb_powering_down:
592 bay->state = mb_empty;
593 #ifdef CONFIG_BLK_DEV_IDE
594 if (bay->cd_index >= 0) {
595 printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
596 bay->cd_index);
597 ide_unregister(bay->cd_index);
598 bay->cd_index = -1;
599 }
600 if (bay->cd_retry) {
601 if (bay->cd_retry > MAX_CD_RETRIES) {
602 /* Should add an error sound (sort of beep in dmasound) */
603 printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i);
604 } else {
605 /* Force a new power down/up sequence */
606 bay->content_id = MB_NO;
607 }
608 }
609 #endif /* CONFIG_BLK_DEV_IDE */
610 MBDBG("mediabay%d: end of power down\n", i);
611 break;
612 }
613 }
615 /*
616 * This procedure runs as a kernel thread to poll the media bay
617 * once each tick and register and unregister the IDE interface
618 * with the IDE driver. It needs to be a thread because
619 * ide_register can't be called from interrupt context.
620 */
621 static int media_bay_task(void *x)
622 {
623 int i;
625 strcpy(current->comm, "media-bay");
626 #ifdef MB_IGNORE_SIGNALS
627 sigfillset(&current->blocked);
628 #endif
630 for (;;) {
631 for (i = 0; i < media_bay_count; ++i) {
632 down(&media_bays[i].lock);
633 if (!media_bays[i].sleeping)
634 media_bay_step(i);
635 up(&media_bays[i].lock);
636 }
638 msleep_interruptible(MB_POLL_DELAY);
639 if (signal_pending(current))
640 return 0;
641 }
642 }
644 static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match)
645 {
646 struct media_bay_info* bay;
647 u32 __iomem *regbase;
648 struct device_node *ofnode;
649 unsigned long base;
650 int i;
652 ofnode = mdev->ofdev.node;
654 if (macio_resource_count(mdev) < 1)
655 return -ENODEV;
656 if (macio_request_resources(mdev, "media-bay"))
657 return -EBUSY;
658 /* Media bay registers are located at the beginning of the
659 * mac-io chip, for now, we trick and align down the first
660 * resource passed in
661 */
662 base = macio_resource_start(mdev, 0) & 0xffff0000u;
663 regbase = (u32 __iomem *)ioremap(base, 0x100);
664 if (regbase == NULL) {
665 macio_release_resources(mdev);
666 return -ENOMEM;
667 }
669 i = media_bay_count++;
670 bay = &media_bays[i];
671 bay->mdev = mdev;
672 bay->base = regbase;
673 bay->index = i;
674 bay->ops = match->data;
675 bay->sleeping = 0;
676 init_MUTEX(&bay->lock);
678 /* Init HW probing */
679 if (bay->ops->init)
680 bay->ops->init(bay);
682 printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
684 /* Force an immediate detect */
685 set_mb_power(bay, 0);
686 msleep(MB_POWER_DELAY);
687 bay->content_id = MB_NO;
688 bay->last_value = bay->ops->content(bay);
689 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
690 bay->state = mb_empty;
691 do {
692 msleep(MB_POLL_DELAY);
693 media_bay_step(i);
694 } while((bay->state != mb_empty) &&
695 (bay->state != mb_up));
697 /* Mark us ready by filling our mdev data */
698 macio_set_drvdata(mdev, bay);
700 /* Startup kernel thread */
701 if (i == 0)
702 kernel_thread(media_bay_task, NULL, CLONE_KERNEL);
704 return 0;
706 }
708 static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
709 {
710 struct media_bay_info *bay = macio_get_drvdata(mdev);
712 if (state.event != mdev->ofdev.dev.power.power_state.event && state.event == PM_EVENT_SUSPEND) {
713 down(&bay->lock);
714 bay->sleeping = 1;
715 set_mb_power(bay, 0);
716 up(&bay->lock);
717 msleep(MB_POLL_DELAY);
718 mdev->ofdev.dev.power.power_state = state;
719 }
720 return 0;
721 }
723 static int media_bay_resume(struct macio_dev *mdev)
724 {
725 struct media_bay_info *bay = macio_get_drvdata(mdev);
727 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
728 mdev->ofdev.dev.power.power_state = PMSG_ON;
730 /* We re-enable the bay using it's previous content
731 only if it did not change. Note those bozo timings,
732 they seem to help the 3400 get it right.
733 */
734 /* Force MB power to 0 */
735 down(&bay->lock);
736 set_mb_power(bay, 0);
737 msleep(MB_POWER_DELAY);
738 if (bay->ops->content(bay) != bay->content_id) {
739 printk("mediabay%d: content changed during sleep...\n", bay->index);
740 up(&bay->lock);
741 return 0;
742 }
743 set_mb_power(bay, 1);
744 bay->last_value = bay->content_id;
745 bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
746 bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
747 #ifdef CONFIG_BLK_DEV_IDE
748 bay->cd_retry = 0;
749 #endif
750 do {
751 msleep(MB_POLL_DELAY);
752 media_bay_step(bay->index);
753 } while((bay->state != mb_empty) &&
754 (bay->state != mb_up));
755 bay->sleeping = 0;
756 up(&bay->lock);
757 }
758 return 0;
759 }
762 /* Definitions of "ops" structures.
763 */
764 static struct mb_ops ohare_mb_ops = {
765 .name = "Ohare",
766 .content = ohare_mb_content,
767 .power = ohare_mb_power,
768 .setup_bus = ohare_mb_setup_bus,
769 .un_reset = ohare_mb_un_reset,
770 .un_reset_ide = ohare_mb_un_reset_ide,
771 };
773 static struct mb_ops heathrow_mb_ops = {
774 .name = "Heathrow",
775 .content = heathrow_mb_content,
776 .power = heathrow_mb_power,
777 .setup_bus = heathrow_mb_setup_bus,
778 .un_reset = heathrow_mb_un_reset,
779 .un_reset_ide = heathrow_mb_un_reset_ide,
780 };
782 static struct mb_ops keylargo_mb_ops = {
783 .name = "KeyLargo",
784 .init = keylargo_mb_init,
785 .content = keylargo_mb_content,
786 .power = keylargo_mb_power,
787 .setup_bus = keylargo_mb_setup_bus,
788 .un_reset = keylargo_mb_un_reset,
789 .un_reset_ide = keylargo_mb_un_reset_ide,
790 };
792 /*
793 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
794 * register is always set when there is something in the media bay.
795 * This causes problems for the interrupt code if we attach an interrupt
796 * handler to the media-bay interrupt, because it tends to go into
797 * an infinite loop calling the media bay interrupt handler.
798 * Therefore we do it all by polling the media bay once each tick.
799 */
801 static struct of_device_id media_bay_match[] =
802 {
803 {
804 .name = "media-bay",
805 .compatible = "keylargo-media-bay",
806 .data = &keylargo_mb_ops,
807 },
808 {
809 .name = "media-bay",
810 .compatible = "heathrow-media-bay",
811 .data = &heathrow_mb_ops,
812 },
813 {
814 .name = "media-bay",
815 .compatible = "ohare-media-bay",
816 .data = &ohare_mb_ops,
817 },
818 {},
819 };
821 static struct macio_driver media_bay_driver =
822 {
823 .name = "media-bay",
824 .match_table = media_bay_match,
825 .probe = media_bay_attach,
826 .suspend = media_bay_suspend,
827 .resume = media_bay_resume
828 };
830 static int __init media_bay_init(void)
831 {
832 int i;
834 for (i=0; i<MAX_BAYS; i++) {
835 memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
836 media_bays[i].content_id = -1;
837 #ifdef CONFIG_BLK_DEV_IDE
838 media_bays[i].cd_index = -1;
839 #endif
840 }
841 if (!machine_is(powermac))
842 return 0;
844 macio_register_driver(&media_bay_driver);
846 return 0;
847 }
849 device_initcall(media_bay_init);