Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/macintosh/mediabay.c b/drivers/macintosh/mediabay.c
new file mode 100644
index 0000000..b8b5a2f
--- /dev/null
+++ b/drivers/macintosh/mediabay.c
@@ -0,0 +1,851 @@
+/*
+ * 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/config.h>
+#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/hdreg.h>
+#include <linux/stddef.h>
+#include <linux/init.h>
+#include <linux/ide.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
+#define MB_IGNORE_SIGNALS
+
+#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 semaphore lock;
+#ifdef CONFIG_BLK_DEV_IDE
+ void __iomem *cd_base;
+ int cd_index;
+ int cd_irq;
+ int cd_retry;
+#endif
+};
+
+#define MAX_BAYS 2
+
+static struct media_bay_info media_bays[MAX_BAYS];
+int media_bay_count = 0;
+
+#ifdef CONFIG_BLK_DEV_IDE
+/* 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 __pmac
+ohare_mb_content(struct media_bay_info *bay)
+{
+ return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7;
+}
+
+static u8 __pmac
+heathrow_mb_content(struct media_bay_info *bay)
+{
+ return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7;
+}
+
+static u8 __pmac
+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 __pmac
+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 __pmac
+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 __pmac
+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 __pmac
+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 __pmac
+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 __pmac
+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 __pmac
+ohare_mb_un_reset(struct media_bay_info* bay)
+{
+ MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
+}
+
+static void __pmac keylargo_mb_init(struct media_bay_info *bay)
+{
+ MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
+}
+
+static void __pmac heathrow_mb_un_reset(struct media_bay_info* bay)
+{
+ MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
+}
+
+static void __pmac keylargo_mb_un_reset(struct media_bay_info* bay)
+{
+ MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
+}
+
+static void __pmac ohare_mb_un_reset_ide(struct media_bay_info* bay)
+{
+ MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
+}
+
+static void __pmac heathrow_mb_un_reset_ide(struct media_bay_info* bay)
+{
+ MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
+}
+
+static void __pmac keylargo_mb_un_reset_ide(struct media_bay_info* bay)
+{
+ MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
+}
+
+static inline void __pmac 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 __pmac 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
+ 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;
+ }
+}
+
+int __pmac check_media_bay(struct device_node *which_bay, int what)
+{
+#ifdef CONFIG_BLK_DEV_IDE
+ 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;
+ }
+#endif /* CONFIG_BLK_DEV_IDE */
+ return -ENODEV;
+}
+EXPORT_SYMBOL(check_media_bay);
+
+int __pmac check_media_bay_by_base(unsigned long base, int what)
+{
+#ifdef CONFIG_BLK_DEV_IDE
+ 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;
+ }
+#endif
+
+ return -ENODEV;
+}
+
+int __pmac media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base,
+ int irq, int index)
+{
+#ifdef CONFIG_BLK_DEV_IDE
+ 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;
+
+ down(&bay->lock);
+
+ bay->cd_base = (void __iomem *) base;
+ bay->cd_irq = irq;
+
+ if ((MB_CD != bay->content_id) || bay->state != mb_up) {
+ up(&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;
+ up(&bay->lock);
+ return 0;
+ }
+ mdelay(1);
+ } while(--timeout);
+ printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i);
+ up(&bay->lock);
+ return -ENODEV;
+ }
+ }
+#endif /* CONFIG_BLK_DEV_IDE */
+
+ return -ENODEV;
+}
+
+static void __pmac 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
+ 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 */
+ break;
+
+#ifdef CONFIG_BLK_DEV_IDE
+ 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) {
+ hw_regs_t hw;
+
+ printk("mediabay %d, registering IDE...\n", i);
+ pmu_suspend();
+ ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL);
+ hw.irq = bay->cd_irq;
+ hw.chipset = ide_pmac;
+ bay->cd_index = ide_register_hw(&hw, NULL);
+ 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 */
+
+ case mb_powering_down:
+ bay->state = mb_empty;
+#ifdef CONFIG_BLK_DEV_IDE
+ if (bay->cd_index >= 0) {
+ printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
+ bay->cd_index);
+ ide_unregister(bay->cd_index);
+ 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 */
+ 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 __pmac media_bay_task(void *x)
+{
+ int i;
+
+ strcpy(current->comm, "media-bay");
+#ifdef MB_IGNORE_SIGNALS
+ sigfillset(¤t->blocked);
+#endif
+
+ for (;;) {
+ for (i = 0; i < media_bay_count; ++i) {
+ down(&media_bays[i].lock);
+ if (!media_bays[i].sleeping)
+ media_bay_step(i);
+ up(&media_bays[i].lock);
+ }
+
+ msleep_interruptible(MB_POLL_DELAY);
+ if (signal_pending(current))
+ return 0;
+ }
+}
+
+static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_match *match)
+{
+ struct media_bay_info* bay;
+ u32 __iomem *regbase;
+ struct device_node *ofnode;
+ 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, we get the parent address for now (hrm...)
+ */
+ regbase = (u32 __iomem *)
+ ioremap(ofnode->parent->addrs[0].address, 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;
+ init_MUTEX(&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)
+ kernel_thread(media_bay_task, NULL, CLONE_KERNEL);
+
+ return 0;
+
+}
+
+static int __pmac media_bay_suspend(struct macio_dev *mdev, u32 state)
+{
+ struct media_bay_info *bay = macio_get_drvdata(mdev);
+
+ if (state != mdev->ofdev.dev.power.power_state && state == PM_SUSPEND_MEM) {
+ down(&bay->lock);
+ bay->sleeping = 1;
+ set_mb_power(bay, 0);
+ up(&bay->lock);
+ msleep(MB_POLL_DELAY);
+ mdev->ofdev.dev.power.power_state = state;
+ }
+ return 0;
+}
+
+static int __pmac media_bay_resume(struct macio_dev *mdev)
+{
+ struct media_bay_info *bay = macio_get_drvdata(mdev);
+
+ if (mdev->ofdev.dev.power.power_state != 0) {
+ mdev->ofdev.dev.power.power_state = 0;
+
+ /* 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 */
+ down(&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);
+ up(&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
+ 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;
+ up(&bay->lock);
+ }
+ return 0;
+}
+
+
+/* Definitions of "ops" structures.
+ */
+static struct mb_ops ohare_mb_ops __pmacdata = {
+ .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 __pmacdata = {
+ .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 __pmacdata = {
+ .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_match media_bay_match[] =
+{
+ {
+ .name = "media-bay",
+ .type = OF_ANY_MATCH,
+ .compatible = "keylargo-media-bay",
+ .data = &keylargo_mb_ops,
+ },
+ {
+ .name = "media-bay",
+ .type = OF_ANY_MATCH,
+ .compatible = "heathrow-media-bay",
+ .data = &heathrow_mb_ops,
+ },
+ {
+ .name = "media-bay",
+ .type = OF_ANY_MATCH,
+ .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
+ media_bays[i].cd_index = -1;
+#endif
+ }
+ if (_machine != _MACH_Pmac)
+ return -ENODEV;
+
+ macio_register_driver(&media_bay_driver);
+
+ return 0;
+}
+
+device_initcall(media_bay_init);