diff options
Diffstat (limited to 'drivers/macintosh/mediabay.c')
| -rw-r--r-- | drivers/macintosh/mediabay.c | 837 |
1 files changed, 837 insertions, 0 deletions
diff --git a/drivers/macintosh/mediabay.c b/drivers/macintosh/mediabay.c new file mode 100644 index 0000000..d7e46d3 --- /dev/null +++ b/drivers/macintosh/mediabay.c @@ -0,0 +1,837 @@ +/* + * Driver for the media bay on the PowerBook 3400 and 2400. + * + * Copyright (C) 1998 Paul Mackerras. + * + * Various evolutions by Benjamin Herrenschmidt & Henry Worth + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/stddef.h> +#include <linux/init.h> +#include <linux/ide.h> +#include <linux/kthread.h> +#include <linux/mutex.h> +#include <asm/prom.h> +#include <asm/pgtable.h> +#include <asm/io.h> +#include <asm/machdep.h> +#include <asm/pmac_feature.h> +#include <asm/mediabay.h> +#include <asm/sections.h> +#include <asm/ohare.h> +#include <asm/heathrow.h> +#include <asm/keylargo.h> +#include <linux/adb.h> +#include <linux/pmu.h> + + +#define MB_DEBUG + +#ifdef MB_DEBUG +#define MBDBG(fmt, arg...) printk(KERN_INFO fmt , ## arg) +#else +#define MBDBG(fmt, arg...) do { } while (0) +#endif + +#define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2)) +#define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r)) + +#define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r))) +#define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v))) +#define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v))) +#define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v))) +#define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r))) +#define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v))) + +struct media_bay_info; + +struct mb_ops { + char* name; + void (*init)(struct media_bay_info *bay); + u8 (*content)(struct media_bay_info *bay); + void (*power)(struct media_bay_info *bay, int on_off); + int (*setup_bus)(struct media_bay_info *bay, u8 device_id); + void (*un_reset)(struct media_bay_info *bay); + void (*un_reset_ide)(struct media_bay_info *bay); +}; + +struct media_bay_info { + u32 __iomem *base; + int content_id; + int state; + int last_value; + int value_count; + int timer; + struct macio_dev *mdev; + struct mb_ops* ops; + int index; + int cached_gpio; + int sleeping; + struct mutex lock; +#ifdef CONFIG_BLK_DEV_IDE_PMAC + ide_hwif_t *cd_port; + void __iomem *cd_base; + int cd_irq; + int cd_retry; +#endif +#if defined(CONFIG_BLK_DEV_IDE_PMAC) + int cd_index; +#endif +}; + +#define MAX_BAYS 2 + +static struct media_bay_info media_bays[MAX_BAYS]; +int media_bay_count = 0; + +#ifdef CONFIG_BLK_DEV_IDE_PMAC +/* check the busy bit in the media-bay ide interface + (assumes the media-bay contains an ide device) */ +#define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0) +#endif + +/* + * Wait that number of ms between each step in normal polling mode + */ +#define MB_POLL_DELAY 25 + +/* + * Consider the media-bay ID value stable if it is the same for + * this number of milliseconds + */ +#define MB_STABLE_DELAY 100 + +/* Wait after powering up the media bay this delay in ms + * timeout bumped for some powerbooks + */ +#define MB_POWER_DELAY 200 + +/* + * Hold the media-bay reset signal true for this many ticks + * after a device is inserted before releasing it. + */ +#define MB_RESET_DELAY 50 + +/* + * Wait this long after the reset signal is released and before doing + * further operations. After this delay, the IDE reset signal is released + * too for an IDE device + */ +#define MB_SETUP_DELAY 100 + +/* + * Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted + * (or until the device is ready) before waiting for busy bit to disappear + */ +#define MB_IDE_WAIT 1000 + +/* + * Timeout waiting for busy bit of an IDE device to go down + */ +#define MB_IDE_TIMEOUT 5000 + +/* + * Max retries of the full power up/down sequence for an IDE device + */ +#define MAX_CD_RETRIES 3 + +/* + * States of a media bay + */ +enum { + mb_empty = 0, /* Idle */ + mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */ + mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */ + mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */ + mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */ + mb_ide_waiting, /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */ + mb_up, /* Media bay full */ + mb_powering_down /* Powering down (avoid too fast down/up) */ +}; + +#define MB_POWER_SOUND 0x08 +#define MB_POWER_FLOPPY 0x04 +#define MB_POWER_ATA 0x02 +#define MB_POWER_PCI 0x01 +#define MB_POWER_OFF 0x00 + +/* + * Functions for polling content of media bay + */ + +static u8 +ohare_mb_content(struct media_bay_info *bay) +{ + return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7; +} + +static u8 +heathrow_mb_content(struct media_bay_info *bay) +{ + return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7; +} + +static u8 +keylargo_mb_content(struct media_bay_info *bay) +{ + int new_gpio; + + new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA; + if (new_gpio) { + bay->cached_gpio = new_gpio; + return MB_NO; + } else if (bay->cached_gpio != new_gpio) { + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); + (void)MB_IN32(bay, KEYLARGO_MBCR); + udelay(5); + MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); + (void)MB_IN32(bay, KEYLARGO_MBCR); + udelay(5); + bay->cached_gpio = new_gpio; + } + return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7; +} + +/* + * Functions for powering up/down the bay, puts the bay device + * into reset state as well + */ + +static void +ohare_mb_power(struct media_bay_info* bay, int on_off) +{ + if (on_off) { + /* Power up device, assert it's reset line */ + MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N); + MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N); + } else { + /* Disable all devices */ + MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK); + MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE); + /* Cut power from bay, release reset line */ + MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N); + MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); + MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); + } + MB_BIC(bay, OHARE_MBCR, 0x00000F00); +} + +static void +heathrow_mb_power(struct media_bay_info* bay, int on_off) +{ + if (on_off) { + /* Power up device, assert it's reset line */ + MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N); + MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N); + } else { + /* Disable all devices */ + MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK); + MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); + /* Cut power from bay, release reset line */ + MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N); + MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); + MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); + } + MB_BIC(bay, HEATHROW_MBCR, 0x00000F00); +} + +static void +keylargo_mb_power(struct media_bay_info* bay, int on_off) +{ + if (on_off) { + /* Power up device, assert it's reset line */ + MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); + MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); + } else { + /* Disable all devices */ + MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK); + MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); + /* Cut power from bay, release reset line */ + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); + MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); + } + MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); +} + +/* + * Functions for configuring the media bay for a given type of device, + * enable the related busses + */ + +static int +ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id) +{ + switch(device_id) { + case MB_FD: + case MB_FD1: + MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE); + MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE); + return 0; + case MB_CD: + MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N); + MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE); + return 0; + case MB_PCI: + MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE); + return 0; + } + return -ENODEV; +} + +static int +heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id) +{ + switch(device_id) { + case MB_FD: + case MB_FD1: + MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE); + MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); + return 0; + case MB_CD: + MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); + MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE); + return 0; + case MB_PCI: + MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE); + return 0; + } + return -ENODEV; +} + +static int +keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id) +{ + switch(device_id) { + case MB_CD: + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE); + MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); + MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); + return 0; + case MB_PCI: + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE); + return 0; + case MB_SOUND: + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE); + return 0; + } + return -ENODEV; +} + +/* + * Functions for tweaking resets + */ + +static void +ohare_mb_un_reset(struct media_bay_info* bay) +{ + MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); +} + +static void keylargo_mb_init(struct media_bay_info *bay) +{ + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); +} + +static void heathrow_mb_un_reset(struct media_bay_info* bay) +{ + MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); +} + +static void keylargo_mb_un_reset(struct media_bay_info* bay) +{ + MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); +} + +static void ohare_mb_un_reset_ide(struct media_bay_info* bay) +{ + MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); +} + +static void heathrow_mb_un_reset_ide(struct media_bay_info* bay) +{ + MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); +} + +static void keylargo_mb_un_reset_ide(struct media_bay_info* bay) +{ + MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); +} + +static inline void set_mb_power(struct media_bay_info* bay, int onoff) +{ + /* Power up up and assert the bay reset line */ + if (onoff) { + bay->ops->power(bay, 1); + bay->state = mb_powering_up; + MBDBG("mediabay%d: powering up\n", bay->index); + } else { + /* Make sure everything is powered down & disabled */ + bay->ops->power(bay, 0); + bay->state = mb_powering_down; + MBDBG("mediabay%d: powering down\n", bay->index); + } + bay->timer = msecs_to_jiffies(MB_POWER_DELAY); +} + +static void poll_media_bay(struct media_bay_info* bay) +{ + int id = bay->ops->content(bay); + + if (id == bay->last_value) { + if (id != bay->content_id) { + bay->value_count += msecs_to_jiffies(MB_POLL_DELAY); + if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) { + /* If the device type changes without going thru + * "MB_NO", we force a pass by "MB_NO" to make sure + * things are properly reset + */ + if ((id != MB_NO) && (bay->content_id != MB_NO)) { + id = MB_NO; + MBDBG("mediabay%d: forcing MB_NO\n", bay->index); + } + MBDBG("mediabay%d: switching to %d\n", bay->index, id); + set_mb_power(bay, id != MB_NO); + bay->content_id = id; + if (id == MB_NO) { +#ifdef CONFIG_BLK_DEV_IDE_PMAC + bay->cd_retry = 0; +#endif + printk(KERN_INFO "media bay %d is empty\n", bay->index); + } + } + } + } else { + bay->last_value = id; + bay->value_count = 0; + } +} + +#ifdef CONFIG_BLK_DEV_IDE_PMAC +int check_media_bay(struct device_node *which_bay, int what) +{ + int i; + + for (i=0; i<media_bay_count; i++) + if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) { + if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up) + return 0; + media_bays[i].cd_index = -1; + return -EINVAL; + } + return -ENODEV; +} +EXPORT_SYMBOL(check_media_bay); + +int check_media_bay_by_base(unsigned long base, int what) +{ + int i; + + for (i=0; i<media_bay_count; i++) + if (media_bays[i].mdev && base == (unsigned long) media_bays[i].cd_base) { + if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up) + return 0; + media_bays[i].cd_index = -1; + return -EINVAL; + } + + return -ENODEV; +} + +int media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base, + int irq, ide_hwif_t *hwif) +{ + int i; + + for (i=0; i<media_bay_count; i++) { + struct media_bay_info* bay = &media_bays[i]; + + if (bay->mdev && which_bay == bay->mdev->ofdev.node) { + int timeout = 5000, index = hwif->index; + + mutex_lock(&bay->lock); + + bay->cd_port = hwif; + bay->cd_base = (void __iomem *) base; + bay->cd_irq = irq; + + if ((MB_CD != bay->content_id) || bay->state != mb_up) { + mutex_unlock(&bay->lock); + return 0; + } + printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i); + do { + if (MB_IDE_READY(i)) { + bay->cd_index = index; + mutex_unlock(&bay->lock); + return 0; + } + mdelay(1); + } while(--timeout); + printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i); + mutex_unlock(&bay->lock); + return -ENODEV; + } + } + + return -ENODEV; +} +#endif /* CONFIG_BLK_DEV_IDE_PMAC */ + +static void media_bay_step(int i) +{ + struct media_bay_info* bay = &media_bays[i]; + + /* We don't poll when powering down */ + if (bay->state != mb_powering_down) + poll_media_bay(bay); + + /* If timer expired or polling IDE busy, run state machine */ + if ((bay->state != mb_ide_waiting) && (bay->timer != 0)) { + bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); + if (bay->timer > 0) + return; + bay->timer = 0; + } + + switch(bay->state) { + case mb_powering_up: + if (bay->ops->setup_bus(bay, bay->last_value) < 0) { + MBDBG("mediabay%d: device not supported (kind:%d)\n", i, bay->content_id); + set_mb_power(bay, 0); + break; + } + bay->timer = msecs_to_jiffies(MB_RESET_DELAY); + bay->state = mb_enabling_bay; + MBDBG("mediabay%d: enabling (kind:%d)\n", i, bay->content_id); + break; + case mb_enabling_bay: + bay->ops->un_reset(bay); + bay->timer = msecs_to_jiffies(MB_SETUP_DELAY); + bay->state = mb_resetting; + MBDBG("mediabay%d: waiting reset (kind:%d)\n", i, bay->content_id); + break; + case mb_resetting: + if (bay->content_id != MB_CD) { + MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id); + bay->state = mb_up; + break; + } +#ifdef CONFIG_BLK_DEV_IDE_PMAC + MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id); + bay->ops->un_reset_ide(bay); + bay->timer = msecs_to_jiffies(MB_IDE_WAIT); + bay->state = mb_ide_resetting; +#else + printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i); + set_mb_power(bay, 0); +#endif /* CONFIG_BLK_DEV_IDE_PMAC */ + break; +#ifdef CONFIG_BLK_DEV_IDE_PMAC + case mb_ide_resetting: + bay->timer = msecs_to_jiffies(MB_IDE_TIMEOUT); + bay->state = mb_ide_waiting; + MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id); + break; + case mb_ide_waiting: + if (bay->cd_base == NULL) { + bay->timer = 0; + bay->state = mb_up; + MBDBG("mediabay%d: up before IDE init\n", i); + break; + } else if (MB_IDE_READY(i)) { + bay->timer = 0; + bay->state = mb_up; + if (bay->cd_index < 0) { + printk("mediabay %d, registering IDE...\n", i); + pmu_suspend(); + ide_port_scan(bay->cd_port); + if (bay->cd_port->present) + bay->cd_index = bay->cd_port->index; + pmu_resume(); + } + if (bay->cd_index == -1) { + /* We eventually do a retry */ + bay->cd_retry++; + printk("IDE register error\n"); + set_mb_power(bay, 0); + } else { + printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index); + MBDBG("mediabay %d IDE ready\n", i); + } + break; + } else if (bay->timer > 0) + bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); + if (bay->timer <= 0) { + printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n", + i, readb(bay->cd_base + 0x70)); + MBDBG("mediabay%d: nIDE Timeout !\n", i); + set_mb_power(bay, 0); + bay->timer = 0; + } + break; +#endif /* CONFIG_BLK_DEV_IDE_PMAC */ + case mb_powering_down: + bay->state = mb_empty; +#ifdef CONFIG_BLK_DEV_IDE_PMAC + if (bay->cd_index >= 0) { + printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i, + bay->cd_index); + ide_port_unregister_devices(bay->cd_port); + bay->cd_index = -1; + } + if (bay->cd_retry) { + if (bay->cd_retry > MAX_CD_RETRIES) { + /* Should add an error sound (sort of beep in dmasound) */ + printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i); + } else { + /* Force a new power down/up sequence */ + bay->content_id = MB_NO; + } + } +#endif /* CONFIG_BLK_DEV_IDE_PMAC */ + MBDBG("mediabay%d: end of power down\n", i); + break; + } +} + +/* + * This procedure runs as a kernel thread to poll the media bay + * once each tick and register and unregister the IDE interface + * with the IDE driver. It needs to be a thread because + * ide_register can't be called from interrupt context. + */ +static int media_bay_task(void *x) +{ + int i; + + while (!kthread_should_stop()) { + for (i = 0; i < media_bay_count; ++i) { + mutex_lock(&media_bays[i].lock); + if (!media_bays[i].sleeping) + media_bay_step(i); + mutex_unlock(&media_bays[i].lock); + } + + msleep_interruptible(MB_POLL_DELAY); + } + return 0; +} + +static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match) +{ + struct media_bay_info* bay; + u32 __iomem *regbase; + struct device_node *ofnode; + unsigned long base; + int i; + + ofnode = mdev->ofdev.node; + + if (macio_resource_count(mdev) < 1) + return -ENODEV; + if (macio_request_resources(mdev, "media-bay")) + return -EBUSY; + /* Media bay registers are located at the beginning of the + * mac-io chip, for now, we trick and align down the first + * resource passed in + */ + base = macio_resource_start(mdev, 0) & 0xffff0000u; + regbase = (u32 __iomem *)ioremap(base, 0x100); + if (regbase == NULL) { + macio_release_resources(mdev); + return -ENOMEM; + } + + i = media_bay_count++; + bay = &media_bays[i]; + bay->mdev = mdev; + bay->base = regbase; + bay->index = i; + bay->ops = match->data; + bay->sleeping = 0; + mutex_init(&bay->lock); + + /* Init HW probing */ + if (bay->ops->init) + bay->ops->init(bay); + + printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name); + + /* Force an immediate detect */ + set_mb_power(bay, 0); + msleep(MB_POWER_DELAY); + bay->content_id = MB_NO; + bay->last_value = bay->ops->content(bay); + bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); + bay->state = mb_empty; + do { + msleep(MB_POLL_DELAY); + media_bay_step(i); + } while((bay->state != mb_empty) && + (bay->state != mb_up)); + + /* Mark us ready by filling our mdev data */ + macio_set_drvdata(mdev, bay); + + /* Startup kernel thread */ + if (i == 0) + kthread_run(media_bay_task, NULL, "media-bay"); + + return 0; + +} + +static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state) +{ + struct media_bay_info *bay = macio_get_drvdata(mdev); + + if (state.event != mdev->ofdev.dev.power.power_state.event + && (state.event & PM_EVENT_SLEEP)) { + mutex_lock(&bay->lock); + bay->sleeping = 1; + set_mb_power(bay, 0); + mutex_unlock(&bay->lock); + msleep(MB_POLL_DELAY); + mdev->ofdev.dev.power.power_state = state; + } + return 0; +} + +static int media_bay_resume(struct macio_dev *mdev) +{ + struct media_bay_info *bay = macio_get_drvdata(mdev); + + if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) { + mdev->ofdev.dev.power.power_state = PMSG_ON; + + /* We re-enable the bay using it's previous content + only if it did not change. Note those bozo timings, + they seem to help the 3400 get it right. + */ + /* Force MB power to 0 */ + mutex_lock(&bay->lock); + set_mb_power(bay, 0); + msleep(MB_POWER_DELAY); + if (bay->ops->content(bay) != bay->content_id) { + printk("mediabay%d: content changed during sleep...\n", bay->index); + mutex_unlock(&bay->lock); + return 0; + } + set_mb_power(bay, 1); + bay->last_value = bay->content_id; + bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY); + bay->timer = msecs_to_jiffies(MB_POWER_DELAY); +#ifdef CONFIG_BLK_DEV_IDE_PMAC + bay->cd_retry = 0; +#endif + do { + msleep(MB_POLL_DELAY); + media_bay_step(bay->index); + } while((bay->state != mb_empty) && + (bay->state != mb_up)); + bay->sleeping = 0; + mutex_unlock(&bay->lock); + } + return 0; +} + + +/* Definitions of "ops" structures. + */ +static struct mb_ops ohare_mb_ops = { + .name = "Ohare", + .content = ohare_mb_content, + .power = ohare_mb_power, + .setup_bus = ohare_mb_setup_bus, + .un_reset = ohare_mb_un_reset, + .un_reset_ide = ohare_mb_un_reset_ide, +}; + +static struct mb_ops heathrow_mb_ops = { + .name = "Heathrow", + .content = heathrow_mb_content, + .power = heathrow_mb_power, + .setup_bus = heathrow_mb_setup_bus, + .un_reset = heathrow_mb_un_reset, + .un_reset_ide = heathrow_mb_un_reset_ide, +}; + +static struct mb_ops keylargo_mb_ops = { + .name = "KeyLargo", + .init = keylargo_mb_init, + .content = keylargo_mb_content, + .power = keylargo_mb_power, + .setup_bus = keylargo_mb_setup_bus, + .un_reset = keylargo_mb_un_reset, + .un_reset_ide = keylargo_mb_un_reset_ide, +}; + +/* + * It seems that the bit for the media-bay interrupt in the IRQ_LEVEL + * register is always set when there is something in the media bay. + * This causes problems for the interrupt code if we attach an interrupt + * handler to the media-bay interrupt, because it tends to go into + * an infinite loop calling the media bay interrupt handler. + * Therefore we do it all by polling the media bay once each tick. + */ + +static struct of_device_id media_bay_match[] = +{ + { + .name = "media-bay", + .compatible = "keylargo-media-bay", + .data = &keylargo_mb_ops, + }, + { + .name = "media-bay", + .compatible = "heathrow-media-bay", + .data = &heathrow_mb_ops, + }, + { + .name = "media-bay", + .compatible = "ohare-media-bay", + .data = &ohare_mb_ops, + }, + {}, +}; + +static struct macio_driver media_bay_driver = +{ + .name = "media-bay", + .match_table = media_bay_match, + .probe = media_bay_attach, + .suspend = media_bay_suspend, + .resume = media_bay_resume +}; + +static int __init media_bay_init(void) +{ + int i; + + for (i=0; i<MAX_BAYS; i++) { + memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info)); + media_bays[i].content_id = -1; +#ifdef CONFIG_BLK_DEV_IDE_PMAC + media_bays[i].cd_index = -1; +#endif + } + if (!machine_is(powermac)) + return 0; + + macio_register_driver(&media_bay_driver); + + return 0; +} + +device_initcall(media_bay_init); |
