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Commit | Line | Data |
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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 | */ | |
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 | ||
aacaf9bd | 170 | static u8 |
1da177e4 LT |
171 | ohare_mb_content(struct media_bay_info *bay) |
172 | { | |
173 | return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7; | |
174 | } | |
175 | ||
aacaf9bd | 176 | static u8 |
1da177e4 LT |
177 | heathrow_mb_content(struct media_bay_info *bay) |
178 | { | |
179 | return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7; | |
180 | } | |
181 | ||
aacaf9bd | 182 | static u8 |
1da177e4 LT |
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 | ||
aacaf9bd | 208 | static void |
1da177e4 LT |
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 | ||
aacaf9bd | 227 | static void |
1da177e4 LT |
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 | ||
aacaf9bd | 246 | static void |
1da177e4 LT |
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 | ||
aacaf9bd | 270 | static int |
1da177e4 LT |
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 | ||
aacaf9bd | 290 | static int |
1da177e4 LT |
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 | ||
aacaf9bd | 310 | static int |
1da177e4 LT |
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 | ||
aacaf9bd | 333 | static void |
1da177e4 LT |
334 | ohare_mb_un_reset(struct media_bay_info* bay) |
335 | { | |
336 | MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); | |
337 | } | |
338 | ||
aacaf9bd | 339 | static void keylargo_mb_init(struct media_bay_info *bay) |
1da177e4 LT |
340 | { |
341 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); | |
342 | } | |
343 | ||
aacaf9bd | 344 | static void heathrow_mb_un_reset(struct media_bay_info* bay) |
1da177e4 LT |
345 | { |
346 | MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); | |
347 | } | |
348 | ||
aacaf9bd | 349 | static void keylargo_mb_un_reset(struct media_bay_info* bay) |
1da177e4 LT |
350 | { |
351 | MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); | |
352 | } | |
353 | ||
aacaf9bd | 354 | static void ohare_mb_un_reset_ide(struct media_bay_info* bay) |
1da177e4 LT |
355 | { |
356 | MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); | |
357 | } | |
358 | ||
aacaf9bd | 359 | static void heathrow_mb_un_reset_ide(struct media_bay_info* bay) |
1da177e4 LT |
360 | { |
361 | MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); | |
362 | } | |
363 | ||
aacaf9bd | 364 | static void keylargo_mb_un_reset_ide(struct media_bay_info* bay) |
1da177e4 LT |
365 | { |
366 | MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); | |
367 | } | |
368 | ||
aacaf9bd | 369 | static inline void set_mb_power(struct media_bay_info* bay, int onoff) |
1da177e4 LT |
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 | ||
aacaf9bd | 385 | static void poll_media_bay(struct media_bay_info* bay) |
1da177e4 LT |
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 | ||
aacaf9bd | 418 | int check_media_bay(struct device_node *which_bay, int what) |
1da177e4 LT |
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 | ||
aacaf9bd | 435 | int check_media_bay_by_base(unsigned long base, int what) |
1da177e4 LT |
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 | ||
aacaf9bd | 452 | int media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base, |
1da177e4 LT |
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 | ||
aacaf9bd | 492 | static void media_bay_step(int i) |
1da177e4 LT |
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 | */ | |
aacaf9bd | 622 | static int media_bay_task(void *x) |
1da177e4 LT |
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 | ||
5e655772 | 645 | static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match) |
1da177e4 LT |
646 | { |
647 | struct media_bay_info* bay; | |
648 | u32 __iomem *regbase; | |
649 | struct device_node *ofnode; | |
cc5d0189 | 650 | unsigned long base; |
1da177e4 LT |
651 | int i; |
652 | ||
653 | ofnode = mdev->ofdev.node; | |
654 | ||
655 | if (macio_resource_count(mdev) < 1) | |
656 | return -ENODEV; | |
657 | if (macio_request_resources(mdev, "media-bay")) | |
658 | return -EBUSY; | |
659 | /* Media bay registers are located at the beginning of the | |
cc5d0189 BH |
660 | * mac-io chip, for now, we trick and align down the first |
661 | * resource passed in | |
1da177e4 | 662 | */ |
cc5d0189 BH |
663 | base = macio_resource_start(mdev, 0) & 0xffff0000u; |
664 | regbase = (u32 __iomem *)ioremap(base, 0x100); | |
1da177e4 LT |
665 | if (regbase == NULL) { |
666 | macio_release_resources(mdev); | |
667 | return -ENOMEM; | |
668 | } | |
669 | ||
670 | i = media_bay_count++; | |
671 | bay = &media_bays[i]; | |
672 | bay->mdev = mdev; | |
673 | bay->base = regbase; | |
674 | bay->index = i; | |
675 | bay->ops = match->data; | |
676 | bay->sleeping = 0; | |
677 | init_MUTEX(&bay->lock); | |
678 | ||
679 | /* Init HW probing */ | |
680 | if (bay->ops->init) | |
681 | bay->ops->init(bay); | |
682 | ||
683 | printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name); | |
684 | ||
685 | /* Force an immediate detect */ | |
686 | set_mb_power(bay, 0); | |
687 | msleep(MB_POWER_DELAY); | |
688 | bay->content_id = MB_NO; | |
689 | bay->last_value = bay->ops->content(bay); | |
690 | bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); | |
691 | bay->state = mb_empty; | |
692 | do { | |
693 | msleep(MB_POLL_DELAY); | |
694 | media_bay_step(i); | |
695 | } while((bay->state != mb_empty) && | |
696 | (bay->state != mb_up)); | |
697 | ||
698 | /* Mark us ready by filling our mdev data */ | |
699 | macio_set_drvdata(mdev, bay); | |
700 | ||
701 | /* Startup kernel thread */ | |
702 | if (i == 0) | |
703 | kernel_thread(media_bay_task, NULL, CLONE_KERNEL); | |
704 | ||
705 | return 0; | |
706 | ||
707 | } | |
708 | ||
aacaf9bd | 709 | static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state) |
1da177e4 LT |
710 | { |
711 | struct media_bay_info *bay = macio_get_drvdata(mdev); | |
712 | ||
ca078bae | 713 | if (state.event != mdev->ofdev.dev.power.power_state.event && state.event == PM_EVENT_SUSPEND) { |
1da177e4 LT |
714 | down(&bay->lock); |
715 | bay->sleeping = 1; | |
716 | set_mb_power(bay, 0); | |
717 | up(&bay->lock); | |
718 | msleep(MB_POLL_DELAY); | |
719 | mdev->ofdev.dev.power.power_state = state; | |
720 | } | |
721 | return 0; | |
722 | } | |
723 | ||
aacaf9bd | 724 | static int media_bay_resume(struct macio_dev *mdev) |
1da177e4 LT |
725 | { |
726 | struct media_bay_info *bay = macio_get_drvdata(mdev); | |
727 | ||
ca078bae | 728 | if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) { |
829ca9a3 | 729 | mdev->ofdev.dev.power.power_state = PMSG_ON; |
1da177e4 LT |
730 | |
731 | /* We re-enable the bay using it's previous content | |
732 | only if it did not change. Note those bozo timings, | |
733 | they seem to help the 3400 get it right. | |
734 | */ | |
735 | /* Force MB power to 0 */ | |
736 | down(&bay->lock); | |
737 | set_mb_power(bay, 0); | |
738 | msleep(MB_POWER_DELAY); | |
739 | if (bay->ops->content(bay) != bay->content_id) { | |
740 | printk("mediabay%d: content changed during sleep...\n", bay->index); | |
741 | up(&bay->lock); | |
742 | return 0; | |
743 | } | |
744 | set_mb_power(bay, 1); | |
745 | bay->last_value = bay->content_id; | |
746 | bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); | |
747 | bay->timer = msecs_to_jiffies(MB_POWER_DELAY); | |
748 | #ifdef CONFIG_BLK_DEV_IDE | |
749 | bay->cd_retry = 0; | |
750 | #endif | |
751 | do { | |
752 | msleep(MB_POLL_DELAY); | |
753 | media_bay_step(bay->index); | |
754 | } while((bay->state != mb_empty) && | |
755 | (bay->state != mb_up)); | |
756 | bay->sleeping = 0; | |
757 | up(&bay->lock); | |
758 | } | |
759 | return 0; | |
760 | } | |
761 | ||
762 | ||
763 | /* Definitions of "ops" structures. | |
764 | */ | |
aacaf9bd | 765 | static struct mb_ops ohare_mb_ops = { |
1da177e4 LT |
766 | .name = "Ohare", |
767 | .content = ohare_mb_content, | |
768 | .power = ohare_mb_power, | |
769 | .setup_bus = ohare_mb_setup_bus, | |
770 | .un_reset = ohare_mb_un_reset, | |
771 | .un_reset_ide = ohare_mb_un_reset_ide, | |
772 | }; | |
773 | ||
aacaf9bd | 774 | static struct mb_ops heathrow_mb_ops = { |
1da177e4 LT |
775 | .name = "Heathrow", |
776 | .content = heathrow_mb_content, | |
777 | .power = heathrow_mb_power, | |
778 | .setup_bus = heathrow_mb_setup_bus, | |
779 | .un_reset = heathrow_mb_un_reset, | |
780 | .un_reset_ide = heathrow_mb_un_reset_ide, | |
781 | }; | |
782 | ||
aacaf9bd | 783 | static struct mb_ops keylargo_mb_ops = { |
1da177e4 LT |
784 | .name = "KeyLargo", |
785 | .init = keylargo_mb_init, | |
786 | .content = keylargo_mb_content, | |
787 | .power = keylargo_mb_power, | |
788 | .setup_bus = keylargo_mb_setup_bus, | |
789 | .un_reset = keylargo_mb_un_reset, | |
790 | .un_reset_ide = keylargo_mb_un_reset_ide, | |
791 | }; | |
792 | ||
793 | /* | |
794 | * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL | |
795 | * register is always set when there is something in the media bay. | |
796 | * This causes problems for the interrupt code if we attach an interrupt | |
797 | * handler to the media-bay interrupt, because it tends to go into | |
798 | * an infinite loop calling the media bay interrupt handler. | |
799 | * Therefore we do it all by polling the media bay once each tick. | |
800 | */ | |
801 | ||
5e655772 | 802 | static struct of_device_id media_bay_match[] = |
1da177e4 LT |
803 | { |
804 | { | |
805 | .name = "media-bay", | |
1da177e4 LT |
806 | .compatible = "keylargo-media-bay", |
807 | .data = &keylargo_mb_ops, | |
808 | }, | |
809 | { | |
810 | .name = "media-bay", | |
1da177e4 LT |
811 | .compatible = "heathrow-media-bay", |
812 | .data = &heathrow_mb_ops, | |
813 | }, | |
814 | { | |
815 | .name = "media-bay", | |
1da177e4 LT |
816 | .compatible = "ohare-media-bay", |
817 | .data = &ohare_mb_ops, | |
818 | }, | |
819 | {}, | |
820 | }; | |
821 | ||
822 | static struct macio_driver media_bay_driver = | |
823 | { | |
824 | .name = "media-bay", | |
825 | .match_table = media_bay_match, | |
826 | .probe = media_bay_attach, | |
827 | .suspend = media_bay_suspend, | |
828 | .resume = media_bay_resume | |
829 | }; | |
830 | ||
831 | static int __init media_bay_init(void) | |
832 | { | |
833 | int i; | |
834 | ||
835 | for (i=0; i<MAX_BAYS; i++) { | |
836 | memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info)); | |
837 | media_bays[i].content_id = -1; | |
838 | #ifdef CONFIG_BLK_DEV_IDE | |
839 | media_bays[i].cd_index = -1; | |
840 | #endif | |
841 | } | |
842 | if (_machine != _MACH_Pmac) | |
843 | return -ENODEV; | |
844 | ||
845 | macio_register_driver(&media_bay_driver); | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
850 | device_initcall(media_bay_init); |