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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 22256 byte(s)
Tag kernel26-2.6.12-alx-r9
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/config.h> |
14 | #include <linux/types.h> |
15 | #include <linux/errno.h> |
16 | #include <linux/kernel.h> |
17 | #include <linux/delay.h> |
18 | #include <linux/sched.h> |
19 | #include <linux/timer.h> |
20 | #include <linux/hdreg.h> |
21 | #include <linux/stddef.h> |
22 | #include <linux/init.h> |
23 | #include <linux/ide.h> |
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 |
39 | #define MB_IGNORE_SIGNALS |
40 | |
41 | #ifdef MB_DEBUG |
42 | #define MBDBG(fmt, arg...) printk(KERN_INFO fmt , ## arg) |
43 | #else |
44 | #define MBDBG(fmt, arg...) do { } while (0) |
45 | #endif |
46 | |
47 | #define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2)) |
48 | #define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r)) |
49 | |
50 | #define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r))) |
51 | #define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v))) |
52 | #define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v))) |
53 | #define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v))) |
54 | #define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r))) |
55 | #define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v))) |
56 | |
57 | struct media_bay_info; |
58 | |
59 | struct mb_ops { |
60 | char* name; |
61 | void (*init)(struct media_bay_info *bay); |
62 | u8 (*content)(struct media_bay_info *bay); |
63 | void (*power)(struct media_bay_info *bay, int on_off); |
64 | int (*setup_bus)(struct media_bay_info *bay, u8 device_id); |
65 | void (*un_reset)(struct media_bay_info *bay); |
66 | void (*un_reset_ide)(struct media_bay_info *bay); |
67 | }; |
68 | |
69 | struct media_bay_info { |
70 | u32 __iomem *base; |
71 | int content_id; |
72 | int state; |
73 | int last_value; |
74 | int value_count; |
75 | int timer; |
76 | struct macio_dev *mdev; |
77 | struct mb_ops* ops; |
78 | int index; |
79 | int cached_gpio; |
80 | int sleeping; |
81 | struct semaphore lock; |
82 | #ifdef CONFIG_BLK_DEV_IDE |
83 | void __iomem *cd_base; |
84 | int cd_index; |
85 | int cd_irq; |
86 | int cd_retry; |
87 | #endif |
88 | }; |
89 | |
90 | #define MAX_BAYS 2 |
91 | |
92 | static struct media_bay_info media_bays[MAX_BAYS]; |
93 | int media_bay_count = 0; |
94 | |
95 | #ifdef CONFIG_BLK_DEV_IDE |
96 | /* check the busy bit in the media-bay ide interface |
97 | (assumes the media-bay contains an ide device) */ |
98 | #define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0) |
99 | #endif |
100 | |
101 | /* |
102 | * Wait that number of ms between each step in normal polling mode |
103 | */ |
104 | #define MB_POLL_DELAY 25 |
105 | |
106 | /* |
107 | * Consider the media-bay ID value stable if it is the same for |
108 | * this number of milliseconds |
109 | */ |
110 | #define MB_STABLE_DELAY 100 |
111 | |
112 | /* Wait after powering up the media bay this delay in ms |
113 | * timeout bumped for some powerbooks |
114 | */ |
115 | #define MB_POWER_DELAY 200 |
116 | |
117 | /* |
118 | * Hold the media-bay reset signal true for this many ticks |
119 | * after a device is inserted before releasing it. |
120 | */ |
121 | #define MB_RESET_DELAY 50 |
122 | |
123 | /* |
124 | * Wait this long after the reset signal is released and before doing |
125 | * further operations. After this delay, the IDE reset signal is released |
126 | * too for an IDE device |
127 | */ |
128 | #define MB_SETUP_DELAY 100 |
129 | |
130 | /* |
131 | * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted |
132 | * (or until the device is ready) before waiting for busy bit to disappear |
133 | */ |
134 | #define MB_IDE_WAIT 1000 |
135 | |
136 | /* |
137 | * Timeout waiting for busy bit of an IDE device to go down |
138 | */ |
139 | #define MB_IDE_TIMEOUT 5000 |
140 | |
141 | /* |
142 | * Max retries of the full power up/down sequence for an IDE device |
143 | */ |
144 | #define MAX_CD_RETRIES 3 |
145 | |
146 | /* |
147 | * States of a media bay |
148 | */ |
149 | enum { |
150 | mb_empty = 0, /* Idle */ |
151 | mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */ |
152 | mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */ |
153 | mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */ |
154 | mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */ |
155 | mb_ide_waiting, /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */ |
156 | mb_up, /* Media bay full */ |
157 | mb_powering_down /* Powering down (avoid too fast down/up) */ |
158 | }; |
159 | |
160 | #define MB_POWER_SOUND 0x08 |
161 | #define MB_POWER_FLOPPY 0x04 |
162 | #define MB_POWER_ATA 0x02 |
163 | #define MB_POWER_PCI 0x01 |
164 | #define MB_POWER_OFF 0x00 |
165 | |
166 | /* |
167 | * Functions for polling content of media bay |
168 | */ |
169 | |
170 | static u8 __pmac |
171 | ohare_mb_content(struct media_bay_info *bay) |
172 | { |
173 | return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7; |
174 | } |
175 | |
176 | static u8 __pmac |
177 | heathrow_mb_content(struct media_bay_info *bay) |
178 | { |
179 | return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7; |
180 | } |
181 | |
182 | static u8 __pmac |
183 | keylargo_mb_content(struct media_bay_info *bay) |
184 | { |
185 | int new_gpio; |
186 | |
187 | new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA; |
188 | if (new_gpio) { |
189 | bay->cached_gpio = new_gpio; |
190 | return MB_NO; |
191 | } else if (bay->cached_gpio != new_gpio) { |
192 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); |
193 | (void)MB_IN32(bay, KEYLARGO_MBCR); |
194 | udelay(5); |
195 | MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); |
196 | (void)MB_IN32(bay, KEYLARGO_MBCR); |
197 | udelay(5); |
198 | bay->cached_gpio = new_gpio; |
199 | } |
200 | return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7; |
201 | } |
202 | |
203 | /* |
204 | * Functions for powering up/down the bay, puts the bay device |
205 | * into reset state as well |
206 | */ |
207 | |
208 | static void __pmac |
209 | ohare_mb_power(struct media_bay_info* bay, int on_off) |
210 | { |
211 | if (on_off) { |
212 | /* Power up device, assert it's reset line */ |
213 | MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N); |
214 | MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N); |
215 | } else { |
216 | /* Disable all devices */ |
217 | MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK); |
218 | MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE); |
219 | /* Cut power from bay, release reset line */ |
220 | MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N); |
221 | MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); |
222 | MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); |
223 | } |
224 | MB_BIC(bay, OHARE_MBCR, 0x00000F00); |
225 | } |
226 | |
227 | static void __pmac |
228 | heathrow_mb_power(struct media_bay_info* bay, int on_off) |
229 | { |
230 | if (on_off) { |
231 | /* Power up device, assert it's reset line */ |
232 | MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N); |
233 | MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N); |
234 | } else { |
235 | /* Disable all devices */ |
236 | MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK); |
237 | MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); |
238 | /* Cut power from bay, release reset line */ |
239 | MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N); |
240 | MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); |
241 | MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); |
242 | } |
243 | MB_BIC(bay, HEATHROW_MBCR, 0x00000F00); |
244 | } |
245 | |
246 | static void __pmac |
247 | keylargo_mb_power(struct media_bay_info* bay, int on_off) |
248 | { |
249 | if (on_off) { |
250 | /* Power up device, assert it's reset line */ |
251 | MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); |
252 | MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); |
253 | } else { |
254 | /* Disable all devices */ |
255 | MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK); |
256 | MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); |
257 | /* Cut power from bay, release reset line */ |
258 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); |
259 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); |
260 | MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); |
261 | } |
262 | MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); |
263 | } |
264 | |
265 | /* |
266 | * Functions for configuring the media bay for a given type of device, |
267 | * enable the related busses |
268 | */ |
269 | |
270 | static int __pmac |
271 | ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id) |
272 | { |
273 | switch(device_id) { |
274 | case MB_FD: |
275 | case MB_FD1: |
276 | MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE); |
277 | MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE); |
278 | return 0; |
279 | case MB_CD: |
280 | MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N); |
281 | MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE); |
282 | return 0; |
283 | case MB_PCI: |
284 | MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE); |
285 | return 0; |
286 | } |
287 | return -ENODEV; |
288 | } |
289 | |
290 | static int __pmac |
291 | heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id) |
292 | { |
293 | switch(device_id) { |
294 | case MB_FD: |
295 | case MB_FD1: |
296 | MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE); |
297 | MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); |
298 | return 0; |
299 | case MB_CD: |
300 | MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); |
301 | MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE); |
302 | return 0; |
303 | case MB_PCI: |
304 | MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE); |
305 | return 0; |
306 | } |
307 | return -ENODEV; |
308 | } |
309 | |
310 | static int __pmac |
311 | keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id) |
312 | { |
313 | switch(device_id) { |
314 | case MB_CD: |
315 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE); |
316 | MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); |
317 | MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); |
318 | return 0; |
319 | case MB_PCI: |
320 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE); |
321 | return 0; |
322 | case MB_SOUND: |
323 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE); |
324 | return 0; |
325 | } |
326 | return -ENODEV; |
327 | } |
328 | |
329 | /* |
330 | * Functions for tweaking resets |
331 | */ |
332 | |
333 | static void __pmac |
334 | ohare_mb_un_reset(struct media_bay_info* bay) |
335 | { |
336 | MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); |
337 | } |
338 | |
339 | static void __pmac keylargo_mb_init(struct media_bay_info *bay) |
340 | { |
341 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); |
342 | } |
343 | |
344 | static void __pmac heathrow_mb_un_reset(struct media_bay_info* bay) |
345 | { |
346 | MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); |
347 | } |
348 | |
349 | static void __pmac keylargo_mb_un_reset(struct media_bay_info* bay) |
350 | { |
351 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); |
352 | } |
353 | |
354 | static void __pmac ohare_mb_un_reset_ide(struct media_bay_info* bay) |
355 | { |
356 | MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); |
357 | } |
358 | |
359 | static void __pmac heathrow_mb_un_reset_ide(struct media_bay_info* bay) |
360 | { |
361 | MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); |
362 | } |
363 | |
364 | static void __pmac keylargo_mb_un_reset_ide(struct media_bay_info* bay) |
365 | { |
366 | MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); |
367 | } |
368 | |
369 | static inline void __pmac set_mb_power(struct media_bay_info* bay, int onoff) |
370 | { |
371 | /* Power up up and assert the bay reset line */ |
372 | if (onoff) { |
373 | bay->ops->power(bay, 1); |
374 | bay->state = mb_powering_up; |
375 | MBDBG("mediabay%d: powering up\n", bay->index); |
376 | } else { |
377 | /* Make sure everything is powered down & disabled */ |
378 | bay->ops->power(bay, 0); |
379 | bay->state = mb_powering_down; |
380 | MBDBG("mediabay%d: powering down\n", bay->index); |
381 | } |
382 | bay->timer = msecs_to_jiffies(MB_POWER_DELAY); |
383 | } |
384 | |
385 | static void __pmac poll_media_bay(struct media_bay_info* bay) |
386 | { |
387 | int id = bay->ops->content(bay); |
388 | |
389 | if (id == bay->last_value) { |
390 | if (id != bay->content_id) { |
391 | bay->value_count += msecs_to_jiffies(MB_POLL_DELAY); |
392 | if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) { |
393 | /* If the device type changes without going thru |
394 | * "MB_NO", we force a pass by "MB_NO" to make sure |
395 | * things are properly reset |
396 | */ |
397 | if ((id != MB_NO) && (bay->content_id != MB_NO)) { |
398 | id = MB_NO; |
399 | MBDBG("mediabay%d: forcing MB_NO\n", bay->index); |
400 | } |
401 | MBDBG("mediabay%d: switching to %d\n", bay->index, id); |
402 | set_mb_power(bay, id != MB_NO); |
403 | bay->content_id = id; |
404 | if (id == MB_NO) { |
405 | #ifdef CONFIG_BLK_DEV_IDE |
406 | bay->cd_retry = 0; |
407 | #endif |
408 | printk(KERN_INFO "media bay %d is empty\n", bay->index); |
409 | } |
410 | } |
411 | } |
412 | } else { |
413 | bay->last_value = id; |
414 | bay->value_count = 0; |
415 | } |
416 | } |
417 | |
418 | int __pmac check_media_bay(struct device_node *which_bay, int what) |
419 | { |
420 | #ifdef CONFIG_BLK_DEV_IDE |
421 | int i; |
422 | |
423 | for (i=0; i<media_bay_count; i++) |
424 | if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) { |
425 | if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up) |
426 | return 0; |
427 | media_bays[i].cd_index = -1; |
428 | return -EINVAL; |
429 | } |
430 | #endif /* CONFIG_BLK_DEV_IDE */ |
431 | return -ENODEV; |
432 | } |
433 | EXPORT_SYMBOL(check_media_bay); |
434 | |
435 | int __pmac check_media_bay_by_base(unsigned long base, int what) |
436 | { |
437 | #ifdef CONFIG_BLK_DEV_IDE |
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 | } |
447 | #endif |
448 | |
449 | return -ENODEV; |
450 | } |
451 | |
452 | int __pmac media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base, |
453 | int irq, int index) |
454 | { |
455 | #ifdef CONFIG_BLK_DEV_IDE |
456 | int i; |
457 | |
458 | for (i=0; i<media_bay_count; i++) { |
459 | struct media_bay_info* bay = &media_bays[i]; |
460 | |
461 | if (bay->mdev && which_bay == bay->mdev->ofdev.node) { |
462 | int timeout = 5000; |
463 | |
464 | down(&bay->lock); |
465 | |
466 | bay->cd_base = (void __iomem *) base; |
467 | bay->cd_irq = irq; |
468 | |
469 | if ((MB_CD != bay->content_id) || bay->state != mb_up) { |
470 | up(&bay->lock); |
471 | return 0; |
472 | } |
473 | printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i); |
474 | do { |
475 | if (MB_IDE_READY(i)) { |
476 | bay->cd_index = index; |
477 | up(&bay->lock); |
478 | return 0; |
479 | } |
480 | mdelay(1); |
481 | } while(--timeout); |
482 | printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i); |
483 | up(&bay->lock); |
484 | return -ENODEV; |
485 | } |
486 | } |
487 | #endif /* CONFIG_BLK_DEV_IDE */ |
488 | |
489 | return -ENODEV; |
490 | } |
491 | |
492 | static void __pmac media_bay_step(int i) |
493 | { |
494 | struct media_bay_info* bay = &media_bays[i]; |
495 | |
496 | /* We don't poll when powering down */ |
497 | if (bay->state != mb_powering_down) |
498 | poll_media_bay(bay); |
499 | |
500 | /* If timer expired or polling IDE busy, run state machine */ |
501 | if ((bay->state != mb_ide_waiting) && (bay->timer != 0)) { |
502 | bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); |
503 | if (bay->timer > 0) |
504 | return; |
505 | bay->timer = 0; |
506 | } |
507 | |
508 | switch(bay->state) { |
509 | case mb_powering_up: |
510 | if (bay->ops->setup_bus(bay, bay->last_value) < 0) { |
511 | MBDBG("mediabay%d: device not supported (kind:%d)\n", i, bay->content_id); |
512 | set_mb_power(bay, 0); |
513 | break; |
514 | } |
515 | bay->timer = msecs_to_jiffies(MB_RESET_DELAY); |
516 | bay->state = mb_enabling_bay; |
517 | MBDBG("mediabay%d: enabling (kind:%d)\n", i, bay->content_id); |
518 | break; |
519 | case mb_enabling_bay: |
520 | bay->ops->un_reset(bay); |
521 | bay->timer = msecs_to_jiffies(MB_SETUP_DELAY); |
522 | bay->state = mb_resetting; |
523 | MBDBG("mediabay%d: waiting reset (kind:%d)\n", i, bay->content_id); |
524 | break; |
525 | |
526 | case mb_resetting: |
527 | if (bay->content_id != MB_CD) { |
528 | MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id); |
529 | bay->state = mb_up; |
530 | break; |
531 | } |
532 | #ifdef CONFIG_BLK_DEV_IDE |
533 | MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id); |
534 | bay->ops->un_reset_ide(bay); |
535 | bay->timer = msecs_to_jiffies(MB_IDE_WAIT); |
536 | bay->state = mb_ide_resetting; |
537 | #else |
538 | printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i); |
539 | set_mb_power(bay, 0); |
540 | #endif /* CONFIG_BLK_DEV_IDE */ |
541 | break; |
542 | |
543 | #ifdef CONFIG_BLK_DEV_IDE |
544 | case mb_ide_resetting: |
545 | bay->timer = msecs_to_jiffies(MB_IDE_TIMEOUT); |
546 | bay->state = mb_ide_waiting; |
547 | MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id); |
548 | break; |
549 | |
550 | case mb_ide_waiting: |
551 | if (bay->cd_base == NULL) { |
552 | bay->timer = 0; |
553 | bay->state = mb_up; |
554 | MBDBG("mediabay%d: up before IDE init\n", i); |
555 | break; |
556 | } else if (MB_IDE_READY(i)) { |
557 | bay->timer = 0; |
558 | bay->state = mb_up; |
559 | if (bay->cd_index < 0) { |
560 | hw_regs_t hw; |
561 | |
562 | printk("mediabay %d, registering IDE...\n", i); |
563 | pmu_suspend(); |
564 | ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL); |
565 | hw.irq = bay->cd_irq; |
566 | hw.chipset = ide_pmac; |
567 | bay->cd_index = ide_register_hw(&hw, NULL); |
568 | pmu_resume(); |
569 | } |
570 | if (bay->cd_index == -1) { |
571 | /* We eventually do a retry */ |
572 | bay->cd_retry++; |
573 | printk("IDE register error\n"); |
574 | set_mb_power(bay, 0); |
575 | } else { |
576 | printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index); |
577 | MBDBG("mediabay %d IDE ready\n", i); |
578 | } |
579 | break; |
580 | } else if (bay->timer > 0) |
581 | bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); |
582 | if (bay->timer <= 0) { |
583 | printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n", |
584 | i, readb(bay->cd_base + 0x70)); |
585 | MBDBG("mediabay%d: nIDE Timeout !\n", i); |
586 | set_mb_power(bay, 0); |
587 | bay->timer = 0; |
588 | } |
589 | break; |
590 | #endif /* CONFIG_BLK_DEV_IDE */ |
591 | |
592 | case mb_powering_down: |
593 | bay->state = mb_empty; |
594 | #ifdef CONFIG_BLK_DEV_IDE |
595 | if (bay->cd_index >= 0) { |
596 | printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i, |
597 | bay->cd_index); |
598 | ide_unregister(bay->cd_index); |
599 | bay->cd_index = -1; |
600 | } |
601 | if (bay->cd_retry) { |
602 | if (bay->cd_retry > MAX_CD_RETRIES) { |
603 | /* Should add an error sound (sort of beep in dmasound) */ |
604 | printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i); |
605 | } else { |
606 | /* Force a new power down/up sequence */ |
607 | bay->content_id = MB_NO; |
608 | } |
609 | } |
610 | #endif /* CONFIG_BLK_DEV_IDE */ |
611 | MBDBG("mediabay%d: end of power down\n", i); |
612 | break; |
613 | } |
614 | } |
615 | |
616 | /* |
617 | * This procedure runs as a kernel thread to poll the media bay |
618 | * once each tick and register and unregister the IDE interface |
619 | * with the IDE driver. It needs to be a thread because |
620 | * ide_register can't be called from interrupt context. |
621 | */ |
622 | static int __pmac media_bay_task(void *x) |
623 | { |
624 | int i; |
625 | |
626 | strcpy(current->comm, "media-bay"); |
627 | #ifdef MB_IGNORE_SIGNALS |
628 | sigfillset(¤t->blocked); |
629 | #endif |
630 | |
631 | for (;;) { |
632 | for (i = 0; i < media_bay_count; ++i) { |
633 | down(&media_bays[i].lock); |
634 | if (!media_bays[i].sleeping) |
635 | media_bay_step(i); |
636 | up(&media_bays[i].lock); |
637 | } |
638 | |
639 | msleep_interruptible(MB_POLL_DELAY); |
640 | if (signal_pending(current)) |
641 | return 0; |
642 | } |
643 | } |
644 | |
645 | static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_match *match) |
646 | { |
647 | struct media_bay_info* bay; |
648 | u32 __iomem *regbase; |
649 | struct device_node *ofnode; |
650 | int i; |
651 | |
652 | ofnode = mdev->ofdev.node; |
653 | |
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, we get the parent address for now (hrm...) |
660 | */ |
661 | regbase = (u32 __iomem *) |
662 | ioremap(ofnode->parent->addrs[0].address, 0x100); |
663 | if (regbase == NULL) { |
664 | macio_release_resources(mdev); |
665 | return -ENOMEM; |
666 | } |
667 | |
668 | i = media_bay_count++; |
669 | bay = &media_bays[i]; |
670 | bay->mdev = mdev; |
671 | bay->base = regbase; |
672 | bay->index = i; |
673 | bay->ops = match->data; |
674 | bay->sleeping = 0; |
675 | init_MUTEX(&bay->lock); |
676 | |
677 | /* Init HW probing */ |
678 | if (bay->ops->init) |
679 | bay->ops->init(bay); |
680 | |
681 | printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name); |
682 | |
683 | /* Force an immediate detect */ |
684 | set_mb_power(bay, 0); |
685 | msleep(MB_POWER_DELAY); |
686 | bay->content_id = MB_NO; |
687 | bay->last_value = bay->ops->content(bay); |
688 | bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); |
689 | bay->state = mb_empty; |
690 | do { |
691 | msleep(MB_POLL_DELAY); |
692 | media_bay_step(i); |
693 | } while((bay->state != mb_empty) && |
694 | (bay->state != mb_up)); |
695 | |
696 | /* Mark us ready by filling our mdev data */ |
697 | macio_set_drvdata(mdev, bay); |
698 | |
699 | /* Startup kernel thread */ |
700 | if (i == 0) |
701 | kernel_thread(media_bay_task, NULL, CLONE_KERNEL); |
702 | |
703 | return 0; |
704 | |
705 | } |
706 | |
707 | static int __pmac media_bay_suspend(struct macio_dev *mdev, pm_message_t state) |
708 | { |
709 | struct media_bay_info *bay = macio_get_drvdata(mdev); |
710 | |
711 | if (state != mdev->ofdev.dev.power.power_state && state == PM_SUSPEND_MEM) { |
712 | down(&bay->lock); |
713 | bay->sleeping = 1; |
714 | set_mb_power(bay, 0); |
715 | up(&bay->lock); |
716 | msleep(MB_POLL_DELAY); |
717 | mdev->ofdev.dev.power.power_state = state; |
718 | } |
719 | return 0; |
720 | } |
721 | |
722 | static int __pmac media_bay_resume(struct macio_dev *mdev) |
723 | { |
724 | struct media_bay_info *bay = macio_get_drvdata(mdev); |
725 | |
726 | if (mdev->ofdev.dev.power.power_state != 0) { |
727 | mdev->ofdev.dev.power.power_state = 0; |
728 | |
729 | /* We re-enable the bay using it's previous content |
730 | only if it did not change. Note those bozo timings, |
731 | they seem to help the 3400 get it right. |
732 | */ |
733 | /* Force MB power to 0 */ |
734 | down(&bay->lock); |
735 | set_mb_power(bay, 0); |
736 | msleep(MB_POWER_DELAY); |
737 | if (bay->ops->content(bay) != bay->content_id) { |
738 | printk("mediabay%d: content changed during sleep...\n", bay->index); |
739 | up(&bay->lock); |
740 | return 0; |
741 | } |
742 | set_mb_power(bay, 1); |
743 | bay->last_value = bay->content_id; |
744 | bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); |
745 | bay->timer = msecs_to_jiffies(MB_POWER_DELAY); |
746 | #ifdef CONFIG_BLK_DEV_IDE |
747 | bay->cd_retry = 0; |
748 | #endif |
749 | do { |
750 | msleep(MB_POLL_DELAY); |
751 | media_bay_step(bay->index); |
752 | } while((bay->state != mb_empty) && |
753 | (bay->state != mb_up)); |
754 | bay->sleeping = 0; |
755 | up(&bay->lock); |
756 | } |
757 | return 0; |
758 | } |
759 | |
760 | |
761 | /* Definitions of "ops" structures. |
762 | */ |
763 | static struct mb_ops ohare_mb_ops __pmacdata = { |
764 | .name = "Ohare", |
765 | .content = ohare_mb_content, |
766 | .power = ohare_mb_power, |
767 | .setup_bus = ohare_mb_setup_bus, |
768 | .un_reset = ohare_mb_un_reset, |
769 | .un_reset_ide = ohare_mb_un_reset_ide, |
770 | }; |
771 | |
772 | static struct mb_ops heathrow_mb_ops __pmacdata = { |
773 | .name = "Heathrow", |
774 | .content = heathrow_mb_content, |
775 | .power = heathrow_mb_power, |
776 | .setup_bus = heathrow_mb_setup_bus, |
777 | .un_reset = heathrow_mb_un_reset, |
778 | .un_reset_ide = heathrow_mb_un_reset_ide, |
779 | }; |
780 | |
781 | static struct mb_ops keylargo_mb_ops __pmacdata = { |
782 | .name = "KeyLargo", |
783 | .init = keylargo_mb_init, |
784 | .content = keylargo_mb_content, |
785 | .power = keylargo_mb_power, |
786 | .setup_bus = keylargo_mb_setup_bus, |
787 | .un_reset = keylargo_mb_un_reset, |
788 | .un_reset_ide = keylargo_mb_un_reset_ide, |
789 | }; |
790 | |
791 | /* |
792 | * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL |
793 | * register is always set when there is something in the media bay. |
794 | * This causes problems for the interrupt code if we attach an interrupt |
795 | * handler to the media-bay interrupt, because it tends to go into |
796 | * an infinite loop calling the media bay interrupt handler. |
797 | * Therefore we do it all by polling the media bay once each tick. |
798 | */ |
799 | |
800 | static struct of_match media_bay_match[] = |
801 | { |
802 | { |
803 | .name = "media-bay", |
804 | .type = OF_ANY_MATCH, |
805 | .compatible = "keylargo-media-bay", |
806 | .data = &keylargo_mb_ops, |
807 | }, |
808 | { |
809 | .name = "media-bay", |
810 | .type = OF_ANY_MATCH, |
811 | .compatible = "heathrow-media-bay", |
812 | .data = &heathrow_mb_ops, |
813 | }, |
814 | { |
815 | .name = "media-bay", |
816 | .type = OF_ANY_MATCH, |
817 | .compatible = "ohare-media-bay", |
818 | .data = &ohare_mb_ops, |
819 | }, |
820 | {}, |
821 | }; |
822 | |
823 | static struct macio_driver media_bay_driver = |
824 | { |
825 | .name = "media-bay", |
826 | .match_table = media_bay_match, |
827 | .probe = media_bay_attach, |
828 | .suspend = media_bay_suspend, |
829 | .resume = media_bay_resume |
830 | }; |
831 | |
832 | static int __init media_bay_init(void) |
833 | { |
834 | int i; |
835 | |
836 | for (i=0; i<MAX_BAYS; i++) { |
837 | memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info)); |
838 | media_bays[i].content_id = -1; |
839 | #ifdef CONFIG_BLK_DEV_IDE |
840 | media_bays[i].cd_index = -1; |
841 | #endif |
842 | } |
843 | if (_machine != _MACH_Pmac) |
844 | return -ENODEV; |
845 | |
846 | macio_register_driver(&media_bay_driver); |
847 | |
848 | return 0; |
849 | } |
850 | |
851 | device_initcall(media_bay_init); |