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753 lines
19 KiB
753 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Driver for the media bay on the PowerBook 3400 and 2400. |
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* |
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* Copyright (C) 1998 Paul Mackerras. |
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* |
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* Various evolutions by Benjamin Herrenschmidt & Henry Worth |
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*/ |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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#include <linux/delay.h> |
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#include <linux/sched.h> |
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#include <linux/timer.h> |
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#include <linux/stddef.h> |
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#include <linux/init.h> |
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#include <linux/kthread.h> |
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#include <linux/mutex.h> |
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#include <linux/pgtable.h> |
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#include <asm/prom.h> |
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#include <asm/io.h> |
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#include <asm/machdep.h> |
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#include <asm/pmac_feature.h> |
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#include <asm/mediabay.h> |
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#include <asm/sections.h> |
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#include <asm/ohare.h> |
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#include <asm/heathrow.h> |
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#include <asm/keylargo.h> |
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#include <linux/adb.h> |
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#include <linux/pmu.h> |
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#define MB_FCR32(bay, r) ((bay)->base + ((r) >> 2)) |
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#define MB_FCR8(bay, r) (((volatile u8 __iomem *)((bay)->base)) + (r)) |
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#define MB_IN32(bay,r) (in_le32(MB_FCR32(bay,r))) |
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#define MB_OUT32(bay,r,v) (out_le32(MB_FCR32(bay,r), (v))) |
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#define MB_BIS(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) | (v))) |
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#define MB_BIC(bay,r,v) (MB_OUT32((bay), (r), MB_IN32((bay), r) & ~(v))) |
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#define MB_IN8(bay,r) (in_8(MB_FCR8(bay,r))) |
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#define MB_OUT8(bay,r,v) (out_8(MB_FCR8(bay,r), (v))) |
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struct media_bay_info; |
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struct mb_ops { |
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char* name; |
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void (*init)(struct media_bay_info *bay); |
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u8 (*content)(struct media_bay_info *bay); |
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void (*power)(struct media_bay_info *bay, int on_off); |
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int (*setup_bus)(struct media_bay_info *bay, u8 device_id); |
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void (*un_reset)(struct media_bay_info *bay); |
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void (*un_reset_ide)(struct media_bay_info *bay); |
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}; |
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struct media_bay_info { |
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u32 __iomem *base; |
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int content_id; |
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int state; |
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int last_value; |
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int value_count; |
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int timer; |
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struct macio_dev *mdev; |
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const struct mb_ops* ops; |
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int index; |
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int cached_gpio; |
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int sleeping; |
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int user_lock; |
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struct mutex lock; |
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}; |
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#define MAX_BAYS 2 |
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static struct media_bay_info media_bays[MAX_BAYS]; |
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static int media_bay_count = 0; |
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/* |
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* Wait that number of ms between each step in normal polling mode |
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*/ |
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#define MB_POLL_DELAY 25 |
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/* |
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* Consider the media-bay ID value stable if it is the same for |
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* this number of milliseconds |
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*/ |
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#define MB_STABLE_DELAY 100 |
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|
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/* Wait after powering up the media bay this delay in ms |
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* timeout bumped for some powerbooks |
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*/ |
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#define MB_POWER_DELAY 200 |
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/* |
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* Hold the media-bay reset signal true for this many ticks |
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* after a device is inserted before releasing it. |
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*/ |
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#define MB_RESET_DELAY 50 |
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/* |
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* Wait this long after the reset signal is released and before doing |
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* further operations. After this delay, the IDE reset signal is released |
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* too for an IDE device |
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*/ |
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#define MB_SETUP_DELAY 100 |
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/* |
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* Wait this many ticks after an IDE device (e.g. CD-ROM) is inserted |
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* (or until the device is ready) before calling into the driver |
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*/ |
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#define MB_IDE_WAIT 1000 |
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/* |
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* States of a media bay |
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*/ |
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enum { |
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mb_empty = 0, /* Idle */ |
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mb_powering_up, /* power bit set, waiting MB_POWER_DELAY */ |
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mb_enabling_bay, /* enable bits set, waiting MB_RESET_DELAY */ |
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mb_resetting, /* reset bit unset, waiting MB_SETUP_DELAY */ |
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mb_ide_resetting, /* IDE reset bit unser, waiting MB_IDE_WAIT */ |
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mb_up, /* Media bay full */ |
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mb_powering_down /* Powering down (avoid too fast down/up) */ |
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}; |
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#define MB_POWER_SOUND 0x08 |
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#define MB_POWER_FLOPPY 0x04 |
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#define MB_POWER_ATA 0x02 |
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#define MB_POWER_PCI 0x01 |
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#define MB_POWER_OFF 0x00 |
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/* |
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* Functions for polling content of media bay |
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*/ |
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static u8 |
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ohare_mb_content(struct media_bay_info *bay) |
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{ |
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return (MB_IN32(bay, OHARE_MBCR) >> 12) & 7; |
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} |
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static u8 |
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heathrow_mb_content(struct media_bay_info *bay) |
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{ |
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return (MB_IN32(bay, HEATHROW_MBCR) >> 12) & 7; |
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} |
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static u8 |
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keylargo_mb_content(struct media_bay_info *bay) |
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{ |
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int new_gpio; |
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new_gpio = MB_IN8(bay, KL_GPIO_MEDIABAY_IRQ) & KEYLARGO_GPIO_INPUT_DATA; |
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if (new_gpio) { |
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bay->cached_gpio = new_gpio; |
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return MB_NO; |
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} else if (bay->cached_gpio != new_gpio) { |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); |
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(void)MB_IN32(bay, KEYLARGO_MBCR); |
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udelay(5); |
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MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); |
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(void)MB_IN32(bay, KEYLARGO_MBCR); |
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udelay(5); |
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bay->cached_gpio = new_gpio; |
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} |
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return (MB_IN32(bay, KEYLARGO_MBCR) >> 4) & 7; |
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} |
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/* |
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* Functions for powering up/down the bay, puts the bay device |
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* into reset state as well |
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*/ |
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static void |
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ohare_mb_power(struct media_bay_info* bay, int on_off) |
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{ |
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if (on_off) { |
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/* Power up device, assert it's reset line */ |
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MB_BIC(bay, OHARE_FCR, OH_BAY_RESET_N); |
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MB_BIC(bay, OHARE_FCR, OH_BAY_POWER_N); |
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} else { |
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/* Disable all devices */ |
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MB_BIC(bay, OHARE_FCR, OH_BAY_DEV_MASK); |
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MB_BIC(bay, OHARE_FCR, OH_FLOPPY_ENABLE); |
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/* Cut power from bay, release reset line */ |
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MB_BIS(bay, OHARE_FCR, OH_BAY_POWER_N); |
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MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); |
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MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); |
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} |
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MB_BIC(bay, OHARE_MBCR, 0x00000F00); |
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} |
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static void |
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heathrow_mb_power(struct media_bay_info* bay, int on_off) |
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{ |
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if (on_off) { |
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/* Power up device, assert it's reset line */ |
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MB_BIC(bay, HEATHROW_FCR, HRW_BAY_RESET_N); |
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MB_BIC(bay, HEATHROW_FCR, HRW_BAY_POWER_N); |
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} else { |
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/* Disable all devices */ |
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MB_BIC(bay, HEATHROW_FCR, HRW_BAY_DEV_MASK); |
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MB_BIC(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); |
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/* Cut power from bay, release reset line */ |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_POWER_N); |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); |
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MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); |
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} |
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MB_BIC(bay, HEATHROW_MBCR, 0x00000F00); |
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} |
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static void |
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keylargo_mb_power(struct media_bay_info* bay, int on_off) |
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{ |
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if (on_off) { |
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/* Power up device, assert it's reset line */ |
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MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); |
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MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); |
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} else { |
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/* Disable all devices */ |
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MB_BIC(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_MASK); |
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MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); |
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/* Cut power from bay, release reset line */ |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER); |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); |
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MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); |
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} |
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MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F); |
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} |
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/* |
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* Functions for configuring the media bay for a given type of device, |
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* enable the related busses |
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*/ |
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static int |
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ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id) |
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{ |
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switch(device_id) { |
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case MB_FD: |
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case MB_FD1: |
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MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE); |
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MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE); |
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return 0; |
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case MB_CD: |
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MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N); |
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MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE); |
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return 0; |
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case MB_PCI: |
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MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE); |
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return 0; |
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} |
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return -ENODEV; |
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} |
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static int |
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heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id) |
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{ |
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switch(device_id) { |
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case MB_FD: |
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case MB_FD1: |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE); |
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MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE); |
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return 0; |
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case MB_CD: |
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MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE); |
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return 0; |
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case MB_PCI: |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE); |
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return 0; |
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} |
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return -ENODEV; |
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} |
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static int |
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keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id) |
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{ |
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switch(device_id) { |
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case MB_CD: |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE); |
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MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); |
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MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE); |
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return 0; |
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case MB_PCI: |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE); |
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return 0; |
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case MB_SOUND: |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE); |
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return 0; |
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} |
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return -ENODEV; |
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} |
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/* |
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* Functions for tweaking resets |
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*/ |
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static void |
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ohare_mb_un_reset(struct media_bay_info* bay) |
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{ |
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MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N); |
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} |
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static void keylargo_mb_init(struct media_bay_info *bay) |
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{ |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE); |
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} |
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static void heathrow_mb_un_reset(struct media_bay_info* bay) |
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{ |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N); |
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} |
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static void keylargo_mb_un_reset(struct media_bay_info* bay) |
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{ |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET); |
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} |
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static void ohare_mb_un_reset_ide(struct media_bay_info* bay) |
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{ |
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MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N); |
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} |
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static void heathrow_mb_un_reset_ide(struct media_bay_info* bay) |
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{ |
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MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N); |
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} |
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static void keylargo_mb_un_reset_ide(struct media_bay_info* bay) |
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{ |
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MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N); |
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} |
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static inline void set_mb_power(struct media_bay_info* bay, int onoff) |
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{ |
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/* Power up up and assert the bay reset line */ |
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if (onoff) { |
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bay->ops->power(bay, 1); |
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bay->state = mb_powering_up; |
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pr_debug("mediabay%d: powering up\n", bay->index); |
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} else { |
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/* Make sure everything is powered down & disabled */ |
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bay->ops->power(bay, 0); |
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bay->state = mb_powering_down; |
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pr_debug("mediabay%d: powering down\n", bay->index); |
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} |
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bay->timer = msecs_to_jiffies(MB_POWER_DELAY); |
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} |
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static void poll_media_bay(struct media_bay_info* bay) |
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{ |
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int id = bay->ops->content(bay); |
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static char *mb_content_types[] = { |
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"a floppy drive", |
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"a floppy drive", |
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"an unsupported audio device", |
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"an ATA device", |
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"an unsupported PCI device", |
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"an unknown device", |
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}; |
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if (id != bay->last_value) { |
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bay->last_value = id; |
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bay->value_count = 0; |
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return; |
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} |
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if (id == bay->content_id) |
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return; |
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bay->value_count += msecs_to_jiffies(MB_POLL_DELAY); |
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if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) { |
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/* If the device type changes without going thru |
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* "MB_NO", we force a pass by "MB_NO" to make sure |
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* things are properly reset |
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*/ |
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if ((id != MB_NO) && (bay->content_id != MB_NO)) { |
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id = MB_NO; |
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pr_debug("mediabay%d: forcing MB_NO\n", bay->index); |
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} |
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pr_debug("mediabay%d: switching to %d\n", bay->index, id); |
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set_mb_power(bay, id != MB_NO); |
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bay->content_id = id; |
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if (id >= MB_NO || id < 0) |
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printk(KERN_INFO "mediabay%d: Bay is now empty\n", bay->index); |
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else |
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printk(KERN_INFO "mediabay%d: Bay contains %s\n", |
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bay->index, mb_content_types[id]); |
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} |
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} |
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int check_media_bay(struct macio_dev *baydev) |
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{ |
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struct media_bay_info* bay; |
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int id; |
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if (baydev == NULL) |
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return MB_NO; |
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/* This returns an instant snapshot, not locking, sine |
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* we may be called with the bay lock held. The resulting |
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* fuzzyness of the result if called at the wrong time is |
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* not actually a huge deal |
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*/ |
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bay = macio_get_drvdata(baydev); |
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if (bay == NULL) |
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return MB_NO; |
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id = bay->content_id; |
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if (bay->state != mb_up) |
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return MB_NO; |
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if (id == MB_FD1) |
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return MB_FD; |
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return id; |
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} |
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EXPORT_SYMBOL_GPL(check_media_bay); |
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void lock_media_bay(struct macio_dev *baydev) |
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{ |
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struct media_bay_info* bay; |
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if (baydev == NULL) |
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return; |
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bay = macio_get_drvdata(baydev); |
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if (bay == NULL) |
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return; |
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mutex_lock(&bay->lock); |
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bay->user_lock = 1; |
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} |
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EXPORT_SYMBOL_GPL(lock_media_bay); |
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void unlock_media_bay(struct macio_dev *baydev) |
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{ |
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struct media_bay_info* bay; |
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if (baydev == NULL) |
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return; |
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bay = macio_get_drvdata(baydev); |
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if (bay == NULL) |
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return; |
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if (bay->user_lock) { |
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bay->user_lock = 0; |
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mutex_unlock(&bay->lock); |
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} |
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} |
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EXPORT_SYMBOL_GPL(unlock_media_bay); |
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static int mb_broadcast_hotplug(struct device *dev, void *data) |
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{ |
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struct media_bay_info* bay = data; |
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struct macio_dev *mdev; |
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struct macio_driver *drv; |
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int state; |
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if (dev->bus != &macio_bus_type) |
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return 0; |
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state = bay->state == mb_up ? bay->content_id : MB_NO; |
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if (state == MB_FD1) |
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state = MB_FD; |
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mdev = to_macio_device(dev); |
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drv = to_macio_driver(dev->driver); |
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if (dev->driver && drv->mediabay_event) |
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drv->mediabay_event(mdev, state); |
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return 0; |
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} |
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static void media_bay_step(int i) |
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{ |
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struct media_bay_info* bay = &media_bays[i]; |
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|
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/* We don't poll when powering down */ |
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if (bay->state != mb_powering_down) |
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poll_media_bay(bay); |
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|
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/* If timer expired run state machine */ |
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if (bay->timer != 0) { |
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bay->timer -= msecs_to_jiffies(MB_POLL_DELAY); |
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if (bay->timer > 0) |
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return; |
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bay->timer = 0; |
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} |
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switch(bay->state) { |
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case mb_powering_up: |
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if (bay->ops->setup_bus(bay, bay->last_value) < 0) { |
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pr_debug("mediabay%d: device not supported (kind:%d)\n", |
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i, bay->content_id); |
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set_mb_power(bay, 0); |
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break; |
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} |
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bay->timer = msecs_to_jiffies(MB_RESET_DELAY); |
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bay->state = mb_enabling_bay; |
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pr_debug("mediabay%d: enabling (kind:%d)\n", i, bay->content_id); |
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break; |
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case mb_enabling_bay: |
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bay->ops->un_reset(bay); |
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bay->timer = msecs_to_jiffies(MB_SETUP_DELAY); |
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bay->state = mb_resetting; |
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pr_debug("mediabay%d: releasing bay reset (kind:%d)\n", |
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i, bay->content_id); |
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break; |
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case mb_resetting: |
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if (bay->content_id != MB_CD) { |
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pr_debug("mediabay%d: bay is up (kind:%d)\n", i, |
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bay->content_id); |
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bay->state = mb_up; |
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device_for_each_child(&bay->mdev->ofdev.dev, |
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bay, mb_broadcast_hotplug); |
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break; |
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} |
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pr_debug("mediabay%d: releasing ATA reset (kind:%d)\n", |
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i, bay->content_id); |
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bay->ops->un_reset_ide(bay); |
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bay->timer = msecs_to_jiffies(MB_IDE_WAIT); |
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bay->state = mb_ide_resetting; |
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break; |
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|
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case mb_ide_resetting: |
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pr_debug("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id); |
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bay->state = mb_up; |
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device_for_each_child(&bay->mdev->ofdev.dev, |
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bay, mb_broadcast_hotplug); |
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break; |
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|
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case mb_powering_down: |
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bay->state = mb_empty; |
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device_for_each_child(&bay->mdev->ofdev.dev, |
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bay, mb_broadcast_hotplug); |
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pr_debug("mediabay%d: end of power down\n", i); |
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break; |
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} |
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} |
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|
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/* |
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* This procedure runs as a kernel thread to poll the media bay |
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* once each tick and register and unregister the IDE interface |
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* 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 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.dev.of_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; |
|
|
|
/* 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); |
|
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 const 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 const 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 const 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 = |
|
{ |
|
.driver = { |
|
.name = "media-bay", |
|
.of_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; |
|
} |
|
if (!machine_is(powermac)) |
|
return 0; |
|
|
|
macio_register_driver(&media_bay_driver); |
|
|
|
return 0; |
|
} |
|
|
|
device_initcall(media_bay_init);
|
|
|