Root/drivers/macintosh/mediabay.c

1/*
2 * Driver for the media bay on the PowerBook 3400 and 2400.
3 *
4 * Copyright (C) 1998 Paul Mackerras.
5 *
6 * Various evolutions by Benjamin Herrenschmidt & Henry Worth
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13#include <linux/types.h>
14#include <linux/errno.h>
15#include <linux/kernel.h>
16#include <linux/delay.h>
17#include <linux/sched.h>
18#include <linux/timer.h>
19#include <linux/stddef.h>
20#include <linux/init.h>
21#include <linux/kthread.h>
22#include <linux/mutex.h>
23#include <asm/prom.h>
24#include <asm/pgtable.h>
25#include <asm/io.h>
26#include <asm/machdep.h>
27#include <asm/pmac_feature.h>
28#include <asm/mediabay.h>
29#include <asm/sections.h>
30#include <asm/ohare.h>
31#include <asm/heathrow.h>
32#include <asm/keylargo.h>
33#include <linux/adb.h>
34#include <linux/pmu.h>
35
36#define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2))
37#define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r))
38
39#define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r)))
40#define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v)))
41#define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v)))
42#define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v)))
43#define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r)))
44#define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v)))
45
46struct media_bay_info;
47
48struct mb_ops {
49    char* name;
50    void (*init)(struct media_bay_info *bay);
51    u8 (*content)(struct media_bay_info *bay);
52    void (*power)(struct media_bay_info *bay, int on_off);
53    int (*setup_bus)(struct media_bay_info *bay, u8 device_id);
54    void (*un_reset)(struct media_bay_info *bay);
55    void (*un_reset_ide)(struct media_bay_info *bay);
56};
57
58struct media_bay_info {
59    u32 __iomem *base;
60    int content_id;
61    int state;
62    int last_value;
63    int value_count;
64    int timer;
65    struct macio_dev *mdev;
66    struct mb_ops* ops;
67    int index;
68    int cached_gpio;
69    int sleeping;
70    int user_lock;
71    struct mutex lock;
72};
73
74#define MAX_BAYS 2
75
76static struct media_bay_info media_bays[MAX_BAYS];
77static int media_bay_count = 0;
78
79/*
80 * Wait that number of ms between each step in normal polling mode
81 */
82#define MB_POLL_DELAY 25
83
84/*
85 * Consider the media-bay ID value stable if it is the same for
86 * this number of milliseconds
87 */
88#define MB_STABLE_DELAY 100
89
90/* Wait after powering up the media bay this delay in ms
91 * timeout bumped for some powerbooks
92 */
93#define MB_POWER_DELAY 200
94
95/*
96 * Hold the media-bay reset signal true for this many ticks
97 * after a device is inserted before releasing it.
98 */
99#define MB_RESET_DELAY 50
100
101/*
102 * Wait this long after the reset signal is released and before doing
103 * further operations. After this delay, the IDE reset signal is released
104 * too for an IDE device
105 */
106#define MB_SETUP_DELAY 100
107
108/*
109 * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted
110 * (or until the device is ready) before calling into the driver
111 */
112#define MB_IDE_WAIT 1000
113
114/*
115 * States of a media bay
116 */
117enum {
118    mb_empty = 0, /* Idle */
119    mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */
120    mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */
121    mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */
122    mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */
123    mb_up, /* Media bay full */
124    mb_powering_down /* Powering down (avoid too fast down/up) */
125};
126
127#define MB_POWER_SOUND 0x08
128#define MB_POWER_FLOPPY 0x04
129#define MB_POWER_ATA 0x02
130#define MB_POWER_PCI 0x01
131#define MB_POWER_OFF 0x00
132
133/*
134 * Functions for polling content of media bay
135 */
136 
137static u8
138ohare_mb_content(struct media_bay_info *bay)
139{
140    return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
141}
142
143static u8
144heathrow_mb_content(struct media_bay_info *bay)
145{
146    return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
147}
148
149static u8
150keylargo_mb_content(struct media_bay_info *bay)
151{
152    int new_gpio;
153
154    new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA;
155    if (new_gpio) {
156        bay->cached_gpio = new_gpio;
157        return MB_NO;
158    } else if (bay->cached_gpio != new_gpio) {
159        MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
160        (void)MB_IN32(bay, KEYLARGO_MBCR);
161        udelay(5);
162        MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
163        (void)MB_IN32(bay, KEYLARGO_MBCR);
164        udelay(5);
165        bay->cached_gpio = new_gpio;
166    }
167    return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7;
168}
169
170/*
171 * Functions for powering up/down the bay, puts the bay device
172 * into reset state as well
173 */
174
175static void
176ohare_mb_power(struct media_bay_info* bay, int on_off)
177{
178    if (on_off) {
179        /* Power up device, assert it's reset line */
180        MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N);
181        MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N);
182    } else {
183        /* Disable all devices */
184        MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK);
185        MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
186        /* Cut power from bay, release reset line */
187        MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N);
188        MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
189        MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
190    }
191    MB_BIC(bay, OHARE_MBCR, 0x00000F00);
192}
193
194static void
195heathrow_mb_power(struct media_bay_info* bay, int on_off)
196{
197    if (on_off) {
198        /* Power up device, assert it's reset line */
199        MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
200        MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
201    } else {
202        /* Disable all devices */
203        MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK);
204        MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
205        /* Cut power from bay, release reset line */
206        MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N);
207        MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
208        MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
209    }
210    MB_BIC(bay, HEATHROW_MBCR, 0x00000F00);
211}
212
213static void
214keylargo_mb_power(struct media_bay_info* bay, int on_off)
215{
216    if (on_off) {
217        /* Power up device, assert it's reset line */
218                MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
219                MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
220    } else {
221        /* Disable all devices */
222        MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK);
223        MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
224        /* Cut power from bay, release reset line */
225        MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
226        MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
227        MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
228    }
229    MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
230}
231
232/*
233 * Functions for configuring the media bay for a given type of device,
234 * enable the related busses
235 */
236
237static int
238ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
239{
240    switch(device_id) {
241        case MB_FD:
242        case MB_FD1:
243            MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
244            MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
245            return 0;
246        case MB_CD:
247            MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
248            MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
249            return 0;
250        case MB_PCI:
251            MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
252            return 0;
253    }
254    return -ENODEV;
255}
256
257static int
258heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
259{
260    switch(device_id) {
261        case MB_FD:
262        case MB_FD1:
263            MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
264            MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
265            return 0;
266        case MB_CD:
267            MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
268            MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
269            return 0;
270        case MB_PCI:
271            MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
272            return 0;
273    }
274    return -ENODEV;
275}
276
277static int
278keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
279{
280    switch(device_id) {
281        case MB_CD:
282            MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
283            MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
284            MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
285            return 0;
286        case MB_PCI:
287            MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
288            return 0;
289        case MB_SOUND:
290            MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
291            return 0;
292    }
293    return -ENODEV;
294}
295
296/*
297 * Functions for tweaking resets
298 */
299
300static void
301ohare_mb_un_reset(struct media_bay_info* bay)
302{
303    MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
304}
305
306static void keylargo_mb_init(struct media_bay_info *bay)
307{
308    MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
309}
310
311static void heathrow_mb_un_reset(struct media_bay_info* bay)
312{
313    MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
314}
315
316static void keylargo_mb_un_reset(struct media_bay_info* bay)
317{
318    MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
319}
320
321static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
322{
323    MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
324}
325
326static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
327{
328    MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
329}
330
331static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
332{
333    MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
334}
335
336static inline void set_mb_power(struct media_bay_info* bay, int onoff)
337{
338    /* Power up up and assert the bay reset line */
339    if (onoff) {
340        bay->ops->power(bay, 1);
341        bay->state = mb_powering_up;
342        pr_debug("mediabay%d: powering up\n", bay->index);
343    } else {
344        /* Make sure everything is powered down & disabled */
345        bay->ops->power(bay, 0);
346        bay->state = mb_powering_down;
347        pr_debug("mediabay%d: powering down\n", bay->index);
348    }
349    bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
350}
351
352static void poll_media_bay(struct media_bay_info* bay)
353{
354    int id = bay->ops->content(bay);
355
356    static char *mb_content_types[] = {
357        "a floppy drive",
358        "a floppy drive",
359        "an unsupported audio device",
360        "an ATA device",
361        "an unsupported PCI device",
362        "an unknown device",
363    };
364
365    if (id != bay->last_value) {
366        bay->last_value = id;
367        bay->value_count = 0;
368        return;
369    }
370    if (id == bay->content_id)
371        return;
372
373    bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);
374    if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {
375        /* If the device type changes without going thru
376         * "MB_NO", we force a pass by "MB_NO" to make sure
377         * things are properly reset
378         */
379        if ((id != MB_NO) && (bay->content_id != MB_NO)) {
380            id = MB_NO;
381            pr_debug("mediabay%d: forcing MB_NO\n", bay->index);
382        }
383        pr_debug("mediabay%d: switching to %d\n", bay->index, id);
384        set_mb_power(bay, id != MB_NO);
385        bay->content_id = id;
386        if (id >= MB_NO || id < 0)
387            printk(KERN_INFO "mediabay%d: Bay is now empty\n", bay->index);
388        else
389            printk(KERN_INFO "mediabay%d: Bay contains %s\n",
390                   bay->index, mb_content_types[id]);
391    }
392}
393
394int check_media_bay(struct macio_dev *baydev)
395{
396    struct media_bay_info* bay;
397    int id;
398
399    if (baydev == NULL)
400        return MB_NO;
401
402    /* This returns an instant snapshot, not locking, sine
403     * we may be called with the bay lock held. The resulting
404     * fuzzyness of the result if called at the wrong time is
405     * not actually a huge deal
406     */
407    bay = macio_get_drvdata(baydev);
408    if (bay == NULL)
409        return MB_NO;
410    id = bay->content_id;
411    if (bay->state != mb_up)
412        return MB_NO;
413    if (id == MB_FD1)
414        return MB_FD;
415    return id;
416}
417EXPORT_SYMBOL_GPL(check_media_bay);
418
419void lock_media_bay(struct macio_dev *baydev)
420{
421    struct media_bay_info* bay;
422
423    if (baydev == NULL)
424        return;
425    bay = macio_get_drvdata(baydev);
426    if (bay == NULL)
427        return;
428    mutex_lock(&bay->lock);
429    bay->user_lock = 1;
430}
431EXPORT_SYMBOL_GPL(lock_media_bay);
432
433void unlock_media_bay(struct macio_dev *baydev)
434{
435    struct media_bay_info* bay;
436
437    if (baydev == NULL)
438        return;
439    bay = macio_get_drvdata(baydev);
440    if (bay == NULL)
441        return;
442    if (bay->user_lock) {
443        bay->user_lock = 0;
444        mutex_unlock(&bay->lock);
445    }
446}
447EXPORT_SYMBOL_GPL(unlock_media_bay);
448
449static int mb_broadcast_hotplug(struct device *dev, void *data)
450{
451    struct media_bay_info* bay = data;
452    struct macio_dev *mdev;
453    struct macio_driver *drv;
454    int state;
455
456    if (dev->bus != &macio_bus_type)
457        return 0;
458
459    state = bay->state == mb_up ? bay->content_id : MB_NO;
460    if (state == MB_FD1)
461        state = MB_FD;
462    mdev = to_macio_device(dev);
463    drv = to_macio_driver(dev->driver);
464    if (dev->driver && drv->mediabay_event)
465        drv->mediabay_event(mdev, state);
466    return 0;
467}
468
469static void media_bay_step(int i)
470{
471    struct media_bay_info* bay = &media_bays[i];
472
473    /* We don't poll when powering down */
474    if (bay->state != mb_powering_down)
475        poll_media_bay(bay);
476
477    /* If timer expired run state machine */
478    if (bay->timer != 0) {
479        bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
480        if (bay->timer > 0)
481            return;
482        bay->timer = 0;
483    }
484
485    switch(bay->state) {
486    case mb_powering_up:
487            if (bay->ops->setup_bus(bay, bay->last_value) < 0) {
488            pr_debug("mediabay%d: device not supported (kind:%d)\n",
489                 i, bay->content_id);
490                set_mb_power(bay, 0);
491                break;
492            }
493            bay->timer = msecs_to_jiffies(MB_RESET_DELAY);
494            bay->state = mb_enabling_bay;
495        pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
496        break;
497    case mb_enabling_bay:
498        bay->ops->un_reset(bay);
499            bay->timer = msecs_to_jiffies(MB_SETUP_DELAY);
500            bay->state = mb_resetting;
501        pr_debug("mediabay%d: releasing bay reset (kind:%d)\n",
502             i, bay->content_id);
503            break;
504    case mb_resetting:
505        if (bay->content_id != MB_CD) {
506            pr_debug("mediabay%d: bay is up (kind:%d)\n", i,
507                 bay->content_id);
508            bay->state = mb_up;
509            device_for_each_child(&bay->mdev->ofdev.dev,
510                          bay, mb_broadcast_hotplug);
511            break;
512            }
513        pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n",
514             i, bay->content_id);
515        bay->ops->un_reset_ide(bay);
516            bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
517            bay->state = mb_ide_resetting;
518            break;
519
520    case mb_ide_resetting:
521        pr_debug("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
522        bay->state = mb_up;
523        device_for_each_child(&bay->mdev->ofdev.dev,
524                      bay, mb_broadcast_hotplug);
525            break;
526
527    case mb_powering_down:
528            bay->state = mb_empty;
529        device_for_each_child(&bay->mdev->ofdev.dev,
530                      bay, mb_broadcast_hotplug);
531        pr_debug("mediabay%d: end of power down\n", i);
532            break;
533    }
534}
535
536/*
537 * This procedure runs as a kernel thread to poll the media bay
538 * once each tick and register and unregister the IDE interface
539 * with the IDE driver. It needs to be a thread because
540 * ide_register can't be called from interrupt context.
541 */
542static int media_bay_task(void *x)
543{
544    int i;
545
546    while (!kthread_should_stop()) {
547        for (i = 0; i < media_bay_count; ++i) {
548            mutex_lock(&media_bays[i].lock);
549            if (!media_bays[i].sleeping)
550                media_bay_step(i);
551            mutex_unlock(&media_bays[i].lock);
552        }
553
554        msleep_interruptible(MB_POLL_DELAY);
555    }
556    return 0;
557}
558
559static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match)
560{
561    struct media_bay_info* bay;
562    u32 __iomem *regbase;
563    struct device_node *ofnode;
564    unsigned long base;
565    int i;
566
567    ofnode = mdev->ofdev.dev.of_node;
568
569    if (macio_resource_count(mdev) < 1)
570        return -ENODEV;
571    if (macio_request_resources(mdev, "media-bay"))
572        return -EBUSY;
573    /* Media bay registers are located at the beginning of the
574         * mac-io chip, for now, we trick and align down the first
575     * resource passed in
576         */
577    base = macio_resource_start(mdev, 0) & 0xffff0000u;
578    regbase = (u32 __iomem *)ioremap(base, 0x100);
579    if (regbase == NULL) {
580        macio_release_resources(mdev);
581        return -ENOMEM;
582    }
583    
584    i = media_bay_count++;
585    bay = &media_bays[i];
586    bay->mdev = mdev;
587    bay->base = regbase;
588    bay->index = i;
589    bay->ops = match->data;
590    bay->sleeping = 0;
591    mutex_init(&bay->lock);
592
593    /* Init HW probing */
594    if (bay->ops->init)
595        bay->ops->init(bay);
596
597    printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
598
599    /* Force an immediate detect */
600    set_mb_power(bay, 0);
601    msleep(MB_POWER_DELAY);
602    bay->content_id = MB_NO;
603    bay->last_value = bay->ops->content(bay);
604    bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
605    bay->state = mb_empty;
606
607    /* Mark us ready by filling our mdev data */
608    macio_set_drvdata(mdev, bay);
609
610    /* Startup kernel thread */
611    if (i == 0)
612        kthread_run(media_bay_task, NULL, "media-bay");
613
614    return 0;
615
616}
617
618static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
619{
620    struct media_bay_info *bay = macio_get_drvdata(mdev);
621
622    if (state.event != mdev->ofdev.dev.power.power_state.event
623        && (state.event & PM_EVENT_SLEEP)) {
624        mutex_lock(&bay->lock);
625        bay->sleeping = 1;
626        set_mb_power(bay, 0);
627        mutex_unlock(&bay->lock);
628        msleep(MB_POLL_DELAY);
629        mdev->ofdev.dev.power.power_state = state;
630    }
631    return 0;
632}
633
634static int media_bay_resume(struct macio_dev *mdev)
635{
636    struct media_bay_info *bay = macio_get_drvdata(mdev);
637
638    if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
639        mdev->ofdev.dev.power.power_state = PMSG_ON;
640
641               /* We re-enable the bay using it's previous content
642                  only if it did not change. Note those bozo timings,
643                  they seem to help the 3400 get it right.
644                */
645               /* Force MB power to 0 */
646        mutex_lock(&bay->lock);
647               set_mb_power(bay, 0);
648        msleep(MB_POWER_DELAY);
649               if (bay->ops->content(bay) != bay->content_id) {
650            printk("mediabay%d: Content changed during sleep...\n", bay->index);
651            mutex_unlock(&bay->lock);
652                   return 0;
653        }
654               set_mb_power(bay, 1);
655               bay->last_value = bay->content_id;
656               bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
657               bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
658               do {
659            msleep(MB_POLL_DELAY);
660                   media_bay_step(bay->index);
661               } while((bay->state != mb_empty) &&
662                   (bay->state != mb_up));
663        bay->sleeping = 0;
664        mutex_unlock(&bay->lock);
665    }
666    return 0;
667}
668
669
670/* Definitions of "ops" structures.
671 */
672static struct mb_ops ohare_mb_ops = {
673    .name = "Ohare",
674    .content = ohare_mb_content,
675    .power = ohare_mb_power,
676    .setup_bus = ohare_mb_setup_bus,
677    .un_reset = ohare_mb_un_reset,
678    .un_reset_ide = ohare_mb_un_reset_ide,
679};
680
681static struct mb_ops heathrow_mb_ops = {
682    .name = "Heathrow",
683    .content = heathrow_mb_content,
684    .power = heathrow_mb_power,
685    .setup_bus = heathrow_mb_setup_bus,
686    .un_reset = heathrow_mb_un_reset,
687    .un_reset_ide = heathrow_mb_un_reset_ide,
688};
689
690static struct mb_ops keylargo_mb_ops = {
691    .name = "KeyLargo",
692    .init = keylargo_mb_init,
693    .content = keylargo_mb_content,
694    .power = keylargo_mb_power,
695    .setup_bus = keylargo_mb_setup_bus,
696    .un_reset = keylargo_mb_un_reset,
697    .un_reset_ide = keylargo_mb_un_reset_ide,
698};
699
700/*
701 * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
702 * register is always set when there is something in the media bay.
703 * This causes problems for the interrupt code if we attach an interrupt
704 * handler to the media-bay interrupt, because it tends to go into
705 * an infinite loop calling the media bay interrupt handler.
706 * Therefore we do it all by polling the media bay once each tick.
707 */
708
709static struct of_device_id media_bay_match[] =
710{
711    {
712    .name = "media-bay",
713    .compatible = "keylargo-media-bay",
714    .data = &keylargo_mb_ops,
715    },
716    {
717    .name = "media-bay",
718    .compatible = "heathrow-media-bay",
719    .data = &heathrow_mb_ops,
720    },
721    {
722    .name = "media-bay",
723    .compatible = "ohare-media-bay",
724    .data = &ohare_mb_ops,
725    },
726    {},
727};
728
729static struct macio_driver media_bay_driver =
730{
731    .driver = {
732        .name = "media-bay",
733        .of_match_table = media_bay_match,
734    },
735    .probe = media_bay_attach,
736    .suspend = media_bay_suspend,
737    .resume = media_bay_resume
738};
739
740static int __init media_bay_init(void)
741{
742    int i;
743
744    for (i=0; i<MAX_BAYS; i++) {
745        memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
746        media_bays[i].content_id = -1;
747    }
748    if (!machine_is(powermac))
749        return 0;
750
751    macio_register_driver(&media_bay_driver);
752
753    return 0;
754}
755
756device_initcall(media_bay_init);
757

Archive Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9



interactive