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62 |
marcus.erl |
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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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/hdreg.h>
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#include <linux/stddef.h>
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#include <linux/init.h>
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#include <linux/ide.h>
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#include <asm/prom.h>
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#include <asm/pgtable.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_DEBUG
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#define MB_IGNORE_SIGNALS
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#ifdef MB_DEBUG
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#define MBDBG(fmt, arg...) printk(KERN_INFO fmt , ## arg)
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#else
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#define MBDBG(fmt, arg...) do { } while (0)
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#endif
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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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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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struct semaphore lock;
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#ifdef CONFIG_BLK_DEV_IDE
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void __iomem *cd_base;
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int cd_index;
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int cd_irq;
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int cd_retry;
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#endif
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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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int media_bay_count = 0;
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#ifdef CONFIG_BLK_DEV_IDE
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/* check the busy bit in the media-bay ide interface
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(assumes the media-bay contains an ide device) */
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#define MB_IDE_READY(i) ((readb(media_bays[i].cd_base + 0x70) & 0x80) == 0)
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#endif
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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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/* 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 waiting for busy bit to disappear
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*/
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#define MB_IDE_WAIT 1000
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/*
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* Timeout waiting for busy bit of an IDE device to go down
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*/
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#define MB_IDE_TIMEOUT 5000
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/*
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* Max retries of the full power up/down sequence for an IDE device
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*/
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#define MAX_CD_RETRIES 3
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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_ide_waiting, /* Waiting for BUSY bit to go away until MB_IDE_TIMEOUT */
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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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| 247 |
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{
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| 248 |
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if (on_off) {
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| 249 |
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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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| 252 |
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} else {
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| 253 |
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/* Disable all devices */
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| 254 |
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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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| 256 |
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/* Cut power from bay, release reset line */
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| 257 |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_POWER);
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| 258 |
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
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| 259 |
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MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
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| 260 |
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}
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| 261 |
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MB_BIC(bay, KEYLARGO_MBCR, 0x0000000F);
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| 262 |
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}
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| 263 |
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| 264 |
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/*
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| 265 |
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* Functions for configuring the media bay for a given type of device,
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| 266 |
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* enable the related busses
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| 267 |
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*/
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| 268 |
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| 269 |
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static int
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| 270 |
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ohare_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
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| 271 |
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{
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| 272 |
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switch(device_id) {
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| 273 |
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case MB_FD:
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| 274 |
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case MB_FD1:
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| 275 |
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MB_BIS(bay, OHARE_FCR, OH_BAY_FLOPPY_ENABLE);
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| 276 |
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MB_BIS(bay, OHARE_FCR, OH_FLOPPY_ENABLE);
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| 277 |
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return 0;
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| 278 |
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case MB_CD:
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| 279 |
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MB_BIC(bay, OHARE_FCR, OH_IDE1_RESET_N);
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| 280 |
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MB_BIS(bay, OHARE_FCR, OH_BAY_IDE_ENABLE);
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| 281 |
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return 0;
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| 282 |
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case MB_PCI:
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| 283 |
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MB_BIS(bay, OHARE_FCR, OH_BAY_PCI_ENABLE);
|
| 284 |
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return 0;
|
| 285 |
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}
|
| 286 |
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return -ENODEV;
|
| 287 |
|
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}
|
| 288 |
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|
| 289 |
|
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static int
|
| 290 |
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heathrow_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
|
| 291 |
|
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{
|
| 292 |
|
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switch(device_id) {
|
| 293 |
|
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case MB_FD:
|
| 294 |
|
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case MB_FD1:
|
| 295 |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_FLOPPY_ENABLE);
|
| 296 |
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MB_BIS(bay, HEATHROW_FCR, HRW_SWIM_ENABLE);
|
| 297 |
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return 0;
|
| 298 |
|
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case MB_CD:
|
| 299 |
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MB_BIC(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
|
| 300 |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_IDE_ENABLE);
|
| 301 |
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return 0;
|
| 302 |
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case MB_PCI:
|
| 303 |
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MB_BIS(bay, HEATHROW_FCR, HRW_BAY_PCI_ENABLE);
|
| 304 |
|
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return 0;
|
| 305 |
|
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}
|
| 306 |
|
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return -ENODEV;
|
| 307 |
|
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}
|
| 308 |
|
|
|
| 309 |
|
|
static int
|
| 310 |
|
|
keylargo_mb_setup_bus(struct media_bay_info* bay, u8 device_id)
|
| 311 |
|
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{
|
| 312 |
|
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switch(device_id) {
|
| 313 |
|
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case MB_CD:
|
| 314 |
|
|
MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_IDE_ENABLE);
|
| 315 |
|
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MB_BIC(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
|
| 316 |
|
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MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_ENABLE);
|
| 317 |
|
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return 0;
|
| 318 |
|
|
case MB_PCI:
|
| 319 |
|
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MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_PCI_ENABLE);
|
| 320 |
|
|
return 0;
|
| 321 |
|
|
case MB_SOUND:
|
| 322 |
|
|
MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_SOUND_ENABLE);
|
| 323 |
|
|
return 0;
|
| 324 |
|
|
}
|
| 325 |
|
|
return -ENODEV;
|
| 326 |
|
|
}
|
| 327 |
|
|
|
| 328 |
|
|
/*
|
| 329 |
|
|
* Functions for tweaking resets
|
| 330 |
|
|
*/
|
| 331 |
|
|
|
| 332 |
|
|
static void
|
| 333 |
|
|
ohare_mb_un_reset(struct media_bay_info* bay)
|
| 334 |
|
|
{
|
| 335 |
|
|
MB_BIS(bay, OHARE_FCR, OH_BAY_RESET_N);
|
| 336 |
|
|
}
|
| 337 |
|
|
|
| 338 |
|
|
static void keylargo_mb_init(struct media_bay_info *bay)
|
| 339 |
|
|
{
|
| 340 |
|
|
MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_ENABLE);
|
| 341 |
|
|
}
|
| 342 |
|
|
|
| 343 |
|
|
static void heathrow_mb_un_reset(struct media_bay_info* bay)
|
| 344 |
|
|
{
|
| 345 |
|
|
MB_BIS(bay, HEATHROW_FCR, HRW_BAY_RESET_N);
|
| 346 |
|
|
}
|
| 347 |
|
|
|
| 348 |
|
|
static void keylargo_mb_un_reset(struct media_bay_info* bay)
|
| 349 |
|
|
{
|
| 350 |
|
|
MB_BIS(bay, KEYLARGO_MBCR, KL_MBCR_MB0_DEV_RESET);
|
| 351 |
|
|
}
|
| 352 |
|
|
|
| 353 |
|
|
static void ohare_mb_un_reset_ide(struct media_bay_info* bay)
|
| 354 |
|
|
{
|
| 355 |
|
|
MB_BIS(bay, OHARE_FCR, OH_IDE1_RESET_N);
|
| 356 |
|
|
}
|
| 357 |
|
|
|
| 358 |
|
|
static void heathrow_mb_un_reset_ide(struct media_bay_info* bay)
|
| 359 |
|
|
{
|
| 360 |
|
|
MB_BIS(bay, HEATHROW_FCR, HRW_IDE1_RESET_N);
|
| 361 |
|
|
}
|
| 362 |
|
|
|
| 363 |
|
|
static void keylargo_mb_un_reset_ide(struct media_bay_info* bay)
|
| 364 |
|
|
{
|
| 365 |
|
|
MB_BIS(bay, KEYLARGO_FCR1, KL1_EIDE0_RESET_N);
|
| 366 |
|
|
}
|
| 367 |
|
|
|
| 368 |
|
|
static inline void set_mb_power(struct media_bay_info* bay, int onoff)
|
| 369 |
|
|
{
|
| 370 |
|
|
/* Power up up and assert the bay reset line */
|
| 371 |
|
|
if (onoff) {
|
| 372 |
|
|
bay->ops->power(bay, 1);
|
| 373 |
|
|
bay->state = mb_powering_up;
|
| 374 |
|
|
MBDBG("mediabay%d: powering up\n", bay->index);
|
| 375 |
|
|
} else {
|
| 376 |
|
|
/* Make sure everything is powered down & disabled */
|
| 377 |
|
|
bay->ops->power(bay, 0);
|
| 378 |
|
|
bay->state = mb_powering_down;
|
| 379 |
|
|
MBDBG("mediabay%d: powering down\n", bay->index);
|
| 380 |
|
|
}
|
| 381 |
|
|
bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
|
| 382 |
|
|
}
|
| 383 |
|
|
|
| 384 |
|
|
static void poll_media_bay(struct media_bay_info* bay)
|
| 385 |
|
|
{
|
| 386 |
|
|
int id = bay->ops->content(bay);
|
| 387 |
|
|
|
| 388 |
|
|
if (id == bay->last_value) {
|
| 389 |
|
|
if (id != bay->content_id) {
|
| 390 |
|
|
bay->value_count += msecs_to_jiffies(MB_POLL_DELAY);
|
| 391 |
|
|
if (bay->value_count >= msecs_to_jiffies(MB_STABLE_DELAY)) {
|
| 392 |
|
|
/* If the device type changes without going thru
|
| 393 |
|
|
* "MB_NO", we force a pass by "MB_NO" to make sure
|
| 394 |
|
|
* things are properly reset
|
| 395 |
|
|
*/
|
| 396 |
|
|
if ((id != MB_NO) && (bay->content_id != MB_NO)) {
|
| 397 |
|
|
id = MB_NO;
|
| 398 |
|
|
MBDBG("mediabay%d: forcing MB_NO\n", bay->index);
|
| 399 |
|
|
}
|
| 400 |
|
|
MBDBG("mediabay%d: switching to %d\n", bay->index, id);
|
| 401 |
|
|
set_mb_power(bay, id != MB_NO);
|
| 402 |
|
|
bay->content_id = id;
|
| 403 |
|
|
if (id == MB_NO) {
|
| 404 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 405 |
|
|
bay->cd_retry = 0;
|
| 406 |
|
|
#endif
|
| 407 |
|
|
printk(KERN_INFO "media bay %d is empty\n", bay->index);
|
| 408 |
|
|
}
|
| 409 |
|
|
}
|
| 410 |
|
|
}
|
| 411 |
|
|
} else {
|
| 412 |
|
|
bay->last_value = id;
|
| 413 |
|
|
bay->value_count = 0;
|
| 414 |
|
|
}
|
| 415 |
|
|
}
|
| 416 |
|
|
|
| 417 |
|
|
int check_media_bay(struct device_node *which_bay, int what)
|
| 418 |
|
|
{
|
| 419 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 420 |
|
|
int i;
|
| 421 |
|
|
|
| 422 |
|
|
for (i=0; i<media_bay_count; i++)
|
| 423 |
|
|
if (media_bays[i].mdev && which_bay == media_bays[i].mdev->ofdev.node) {
|
| 424 |
|
|
if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
|
| 425 |
|
|
return 0;
|
| 426 |
|
|
media_bays[i].cd_index = -1;
|
| 427 |
|
|
return -EINVAL;
|
| 428 |
|
|
}
|
| 429 |
|
|
#endif /* CONFIG_BLK_DEV_IDE */
|
| 430 |
|
|
return -ENODEV;
|
| 431 |
|
|
}
|
| 432 |
|
|
EXPORT_SYMBOL(check_media_bay);
|
| 433 |
|
|
|
| 434 |
|
|
int check_media_bay_by_base(unsigned long base, int what)
|
| 435 |
|
|
{
|
| 436 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 437 |
|
|
int i;
|
| 438 |
|
|
|
| 439 |
|
|
for (i=0; i<media_bay_count; i++)
|
| 440 |
|
|
if (media_bays[i].mdev && base == (unsigned long) media_bays[i].cd_base) {
|
| 441 |
|
|
if ((what == media_bays[i].content_id) && media_bays[i].state == mb_up)
|
| 442 |
|
|
return 0;
|
| 443 |
|
|
media_bays[i].cd_index = -1;
|
| 444 |
|
|
return -EINVAL;
|
| 445 |
|
|
}
|
| 446 |
|
|
#endif
|
| 447 |
|
|
|
| 448 |
|
|
return -ENODEV;
|
| 449 |
|
|
}
|
| 450 |
|
|
|
| 451 |
|
|
int media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base,
|
| 452 |
|
|
int irq, int index)
|
| 453 |
|
|
{
|
| 454 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 455 |
|
|
int i;
|
| 456 |
|
|
|
| 457 |
|
|
for (i=0; i<media_bay_count; i++) {
|
| 458 |
|
|
struct media_bay_info* bay = &media_bays[i];
|
| 459 |
|
|
|
| 460 |
|
|
if (bay->mdev && which_bay == bay->mdev->ofdev.node) {
|
| 461 |
|
|
int timeout = 5000;
|
| 462 |
|
|
|
| 463 |
|
|
down(&bay->lock);
|
| 464 |
|
|
|
| 465 |
|
|
bay->cd_base = (void __iomem *) base;
|
| 466 |
|
|
bay->cd_irq = irq;
|
| 467 |
|
|
|
| 468 |
|
|
if ((MB_CD != bay->content_id) || bay->state != mb_up) {
|
| 469 |
|
|
up(&bay->lock);
|
| 470 |
|
|
return 0;
|
| 471 |
|
|
}
|
| 472 |
|
|
printk(KERN_DEBUG "Registered ide%d for media bay %d\n", index, i);
|
| 473 |
|
|
do {
|
| 474 |
|
|
if (MB_IDE_READY(i)) {
|
| 475 |
|
|
bay->cd_index = index;
|
| 476 |
|
|
up(&bay->lock);
|
| 477 |
|
|
return 0;
|
| 478 |
|
|
}
|
| 479 |
|
|
mdelay(1);
|
| 480 |
|
|
} while(--timeout);
|
| 481 |
|
|
printk(KERN_DEBUG "Timeount waiting IDE in bay %d\n", i);
|
| 482 |
|
|
up(&bay->lock);
|
| 483 |
|
|
return -ENODEV;
|
| 484 |
|
|
}
|
| 485 |
|
|
}
|
| 486 |
|
|
#endif /* CONFIG_BLK_DEV_IDE */
|
| 487 |
|
|
|
| 488 |
|
|
return -ENODEV;
|
| 489 |
|
|
}
|
| 490 |
|
|
|
| 491 |
|
|
static void media_bay_step(int i)
|
| 492 |
|
|
{
|
| 493 |
|
|
struct media_bay_info* bay = &media_bays[i];
|
| 494 |
|
|
|
| 495 |
|
|
/* We don't poll when powering down */
|
| 496 |
|
|
if (bay->state != mb_powering_down)
|
| 497 |
|
|
poll_media_bay(bay);
|
| 498 |
|
|
|
| 499 |
|
|
/* If timer expired or polling IDE busy, run state machine */
|
| 500 |
|
|
if ((bay->state != mb_ide_waiting) && (bay->timer != 0)) {
|
| 501 |
|
|
bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
|
| 502 |
|
|
if (bay->timer > 0)
|
| 503 |
|
|
return;
|
| 504 |
|
|
bay->timer = 0;
|
| 505 |
|
|
}
|
| 506 |
|
|
|
| 507 |
|
|
switch(bay->state) {
|
| 508 |
|
|
case mb_powering_up:
|
| 509 |
|
|
if (bay->ops->setup_bus(bay, bay->last_value) < 0) {
|
| 510 |
|
|
MBDBG("mediabay%d: device not supported (kind:%d)\n", i, bay->content_id);
|
| 511 |
|
|
set_mb_power(bay, 0);
|
| 512 |
|
|
break;
|
| 513 |
|
|
}
|
| 514 |
|
|
bay->timer = msecs_to_jiffies(MB_RESET_DELAY);
|
| 515 |
|
|
bay->state = mb_enabling_bay;
|
| 516 |
|
|
MBDBG("mediabay%d: enabling (kind:%d)\n", i, bay->content_id);
|
| 517 |
|
|
break;
|
| 518 |
|
|
case mb_enabling_bay:
|
| 519 |
|
|
bay->ops->un_reset(bay);
|
| 520 |
|
|
bay->timer = msecs_to_jiffies(MB_SETUP_DELAY);
|
| 521 |
|
|
bay->state = mb_resetting;
|
| 522 |
|
|
MBDBG("mediabay%d: waiting reset (kind:%d)\n", i, bay->content_id);
|
| 523 |
|
|
break;
|
| 524 |
|
|
|
| 525 |
|
|
case mb_resetting:
|
| 526 |
|
|
if (bay->content_id != MB_CD) {
|
| 527 |
|
|
MBDBG("mediabay%d: bay is up (kind:%d)\n", i, bay->content_id);
|
| 528 |
|
|
bay->state = mb_up;
|
| 529 |
|
|
break;
|
| 530 |
|
|
}
|
| 531 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 532 |
|
|
MBDBG("mediabay%d: waiting IDE reset (kind:%d)\n", i, bay->content_id);
|
| 533 |
|
|
bay->ops->un_reset_ide(bay);
|
| 534 |
|
|
bay->timer = msecs_to_jiffies(MB_IDE_WAIT);
|
| 535 |
|
|
bay->state = mb_ide_resetting;
|
| 536 |
|
|
#else
|
| 537 |
|
|
printk(KERN_DEBUG "media-bay %d is ide (not compiled in kernel)\n", i);
|
| 538 |
|
|
set_mb_power(bay, 0);
|
| 539 |
|
|
#endif /* CONFIG_BLK_DEV_IDE */
|
| 540 |
|
|
break;
|
| 541 |
|
|
|
| 542 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 543 |
|
|
case mb_ide_resetting:
|
| 544 |
|
|
bay->timer = msecs_to_jiffies(MB_IDE_TIMEOUT);
|
| 545 |
|
|
bay->state = mb_ide_waiting;
|
| 546 |
|
|
MBDBG("mediabay%d: waiting IDE ready (kind:%d)\n", i, bay->content_id);
|
| 547 |
|
|
break;
|
| 548 |
|
|
|
| 549 |
|
|
case mb_ide_waiting:
|
| 550 |
|
|
if (bay->cd_base == NULL) {
|
| 551 |
|
|
bay->timer = 0;
|
| 552 |
|
|
bay->state = mb_up;
|
| 553 |
|
|
MBDBG("mediabay%d: up before IDE init\n", i);
|
| 554 |
|
|
break;
|
| 555 |
|
|
} else if (MB_IDE_READY(i)) {
|
| 556 |
|
|
bay->timer = 0;
|
| 557 |
|
|
bay->state = mb_up;
|
| 558 |
|
|
if (bay->cd_index < 0) {
|
| 559 |
|
|
hw_regs_t hw;
|
| 560 |
|
|
|
| 561 |
|
|
printk("mediabay %d, registering IDE...\n", i);
|
| 562 |
|
|
pmu_suspend();
|
| 563 |
|
|
ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL);
|
| 564 |
|
|
hw.irq = bay->cd_irq;
|
| 565 |
|
|
hw.chipset = ide_pmac;
|
| 566 |
|
|
bay->cd_index = ide_register_hw(&hw, NULL, 0, NULL);
|
| 567 |
|
|
pmu_resume();
|
| 568 |
|
|
}
|
| 569 |
|
|
if (bay->cd_index == -1) {
|
| 570 |
|
|
/* We eventually do a retry */
|
| 571 |
|
|
bay->cd_retry++;
|
| 572 |
|
|
printk("IDE register error\n");
|
| 573 |
|
|
set_mb_power(bay, 0);
|
| 574 |
|
|
} else {
|
| 575 |
|
|
printk(KERN_DEBUG "media-bay %d is ide%d\n", i, bay->cd_index);
|
| 576 |
|
|
MBDBG("mediabay %d IDE ready\n", i);
|
| 577 |
|
|
}
|
| 578 |
|
|
break;
|
| 579 |
|
|
} else if (bay->timer > 0)
|
| 580 |
|
|
bay->timer -= msecs_to_jiffies(MB_POLL_DELAY);
|
| 581 |
|
|
if (bay->timer <= 0) {
|
| 582 |
|
|
printk("\nIDE Timeout in bay %d !, IDE state is: 0x%02x\n",
|
| 583 |
|
|
i, readb(bay->cd_base + 0x70));
|
| 584 |
|
|
MBDBG("mediabay%d: nIDE Timeout !\n", i);
|
| 585 |
|
|
set_mb_power(bay, 0);
|
| 586 |
|
|
bay->timer = 0;
|
| 587 |
|
|
}
|
| 588 |
|
|
break;
|
| 589 |
|
|
#endif /* CONFIG_BLK_DEV_IDE */
|
| 590 |
|
|
|
| 591 |
|
|
case mb_powering_down:
|
| 592 |
|
|
bay->state = mb_empty;
|
| 593 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 594 |
|
|
if (bay->cd_index >= 0) {
|
| 595 |
|
|
printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
|
| 596 |
|
|
bay->cd_index);
|
| 597 |
|
|
ide_unregister(bay->cd_index);
|
| 598 |
|
|
bay->cd_index = -1;
|
| 599 |
|
|
}
|
| 600 |
|
|
if (bay->cd_retry) {
|
| 601 |
|
|
if (bay->cd_retry > MAX_CD_RETRIES) {
|
| 602 |
|
|
/* Should add an error sound (sort of beep in dmasound) */
|
| 603 |
|
|
printk("\nmedia-bay %d, IDE device badly inserted or unrecognised\n", i);
|
| 604 |
|
|
} else {
|
| 605 |
|
|
/* Force a new power down/up sequence */
|
| 606 |
|
|
bay->content_id = MB_NO;
|
| 607 |
|
|
}
|
| 608 |
|
|
}
|
| 609 |
|
|
#endif /* CONFIG_BLK_DEV_IDE */
|
| 610 |
|
|
MBDBG("mediabay%d: end of power down\n", i);
|
| 611 |
|
|
break;
|
| 612 |
|
|
}
|
| 613 |
|
|
}
|
| 614 |
|
|
|
| 615 |
|
|
/*
|
| 616 |
|
|
* This procedure runs as a kernel thread to poll the media bay
|
| 617 |
|
|
* once each tick and register and unregister the IDE interface
|
| 618 |
|
|
* with the IDE driver. It needs to be a thread because
|
| 619 |
|
|
* ide_register can't be called from interrupt context.
|
| 620 |
|
|
*/
|
| 621 |
|
|
static int media_bay_task(void *x)
|
| 622 |
|
|
{
|
| 623 |
|
|
int i;
|
| 624 |
|
|
|
| 625 |
|
|
strcpy(current->comm, "media-bay");
|
| 626 |
|
|
#ifdef MB_IGNORE_SIGNALS
|
| 627 |
|
|
sigfillset(¤t->blocked);
|
| 628 |
|
|
#endif
|
| 629 |
|
|
|
| 630 |
|
|
for (;;) {
|
| 631 |
|
|
for (i = 0; i < media_bay_count; ++i) {
|
| 632 |
|
|
down(&media_bays[i].lock);
|
| 633 |
|
|
if (!media_bays[i].sleeping)
|
| 634 |
|
|
media_bay_step(i);
|
| 635 |
|
|
up(&media_bays[i].lock);
|
| 636 |
|
|
}
|
| 637 |
|
|
|
| 638 |
|
|
msleep_interruptible(MB_POLL_DELAY);
|
| 639 |
|
|
if (signal_pending(current))
|
| 640 |
|
|
return 0;
|
| 641 |
|
|
}
|
| 642 |
|
|
}
|
| 643 |
|
|
|
| 644 |
|
|
static int __devinit media_bay_attach(struct macio_dev *mdev, const struct of_device_id *match)
|
| 645 |
|
|
{
|
| 646 |
|
|
struct media_bay_info* bay;
|
| 647 |
|
|
u32 __iomem *regbase;
|
| 648 |
|
|
struct device_node *ofnode;
|
| 649 |
|
|
unsigned long base;
|
| 650 |
|
|
int i;
|
| 651 |
|
|
|
| 652 |
|
|
ofnode = mdev->ofdev.node;
|
| 653 |
|
|
|
| 654 |
|
|
if (macio_resource_count(mdev) < 1)
|
| 655 |
|
|
return -ENODEV;
|
| 656 |
|
|
if (macio_request_resources(mdev, "media-bay"))
|
| 657 |
|
|
return -EBUSY;
|
| 658 |
|
|
/* Media bay registers are located at the beginning of the
|
| 659 |
|
|
* mac-io chip, for now, we trick and align down the first
|
| 660 |
|
|
* resource passed in
|
| 661 |
|
|
*/
|
| 662 |
|
|
base = macio_resource_start(mdev, 0) & 0xffff0000u;
|
| 663 |
|
|
regbase = (u32 __iomem *)ioremap(base, 0x100);
|
| 664 |
|
|
if (regbase == NULL) {
|
| 665 |
|
|
macio_release_resources(mdev);
|
| 666 |
|
|
return -ENOMEM;
|
| 667 |
|
|
}
|
| 668 |
|
|
|
| 669 |
|
|
i = media_bay_count++;
|
| 670 |
|
|
bay = &media_bays[i];
|
| 671 |
|
|
bay->mdev = mdev;
|
| 672 |
|
|
bay->base = regbase;
|
| 673 |
|
|
bay->index = i;
|
| 674 |
|
|
bay->ops = match->data;
|
| 675 |
|
|
bay->sleeping = 0;
|
| 676 |
|
|
init_MUTEX(&bay->lock);
|
| 677 |
|
|
|
| 678 |
|
|
/* Init HW probing */
|
| 679 |
|
|
if (bay->ops->init)
|
| 680 |
|
|
bay->ops->init(bay);
|
| 681 |
|
|
|
| 682 |
|
|
printk(KERN_INFO "mediabay%d: Registered %s media-bay\n", i, bay->ops->name);
|
| 683 |
|
|
|
| 684 |
|
|
/* Force an immediate detect */
|
| 685 |
|
|
set_mb_power(bay, 0);
|
| 686 |
|
|
msleep(MB_POWER_DELAY);
|
| 687 |
|
|
bay->content_id = MB_NO;
|
| 688 |
|
|
bay->last_value = bay->ops->content(bay);
|
| 689 |
|
|
bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
|
| 690 |
|
|
bay->state = mb_empty;
|
| 691 |
|
|
do {
|
| 692 |
|
|
msleep(MB_POLL_DELAY);
|
| 693 |
|
|
media_bay_step(i);
|
| 694 |
|
|
} while((bay->state != mb_empty) &&
|
| 695 |
|
|
(bay->state != mb_up));
|
| 696 |
|
|
|
| 697 |
|
|
/* Mark us ready by filling our mdev data */
|
| 698 |
|
|
macio_set_drvdata(mdev, bay);
|
| 699 |
|
|
|
| 700 |
|
|
/* Startup kernel thread */
|
| 701 |
|
|
if (i == 0)
|
| 702 |
|
|
kernel_thread(media_bay_task, NULL, CLONE_KERNEL);
|
| 703 |
|
|
|
| 704 |
|
|
return 0;
|
| 705 |
|
|
|
| 706 |
|
|
}
|
| 707 |
|
|
|
| 708 |
|
|
static int media_bay_suspend(struct macio_dev *mdev, pm_message_t state)
|
| 709 |
|
|
{
|
| 710 |
|
|
struct media_bay_info *bay = macio_get_drvdata(mdev);
|
| 711 |
|
|
|
| 712 |
|
|
if (state.event != mdev->ofdev.dev.power.power_state.event && state.event == PM_EVENT_SUSPEND) {
|
| 713 |
|
|
down(&bay->lock);
|
| 714 |
|
|
bay->sleeping = 1;
|
| 715 |
|
|
set_mb_power(bay, 0);
|
| 716 |
|
|
up(&bay->lock);
|
| 717 |
|
|
msleep(MB_POLL_DELAY);
|
| 718 |
|
|
mdev->ofdev.dev.power.power_state = state;
|
| 719 |
|
|
}
|
| 720 |
|
|
return 0;
|
| 721 |
|
|
}
|
| 722 |
|
|
|
| 723 |
|
|
static int media_bay_resume(struct macio_dev *mdev)
|
| 724 |
|
|
{
|
| 725 |
|
|
struct media_bay_info *bay = macio_get_drvdata(mdev);
|
| 726 |
|
|
|
| 727 |
|
|
if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
|
| 728 |
|
|
mdev->ofdev.dev.power.power_state = PMSG_ON;
|
| 729 |
|
|
|
| 730 |
|
|
/* We re-enable the bay using it's previous content
|
| 731 |
|
|
only if it did not change. Note those bozo timings,
|
| 732 |
|
|
they seem to help the 3400 get it right.
|
| 733 |
|
|
*/
|
| 734 |
|
|
/* Force MB power to 0 */
|
| 735 |
|
|
down(&bay->lock);
|
| 736 |
|
|
set_mb_power(bay, 0);
|
| 737 |
|
|
msleep(MB_POWER_DELAY);
|
| 738 |
|
|
if (bay->ops->content(bay) != bay->content_id) {
|
| 739 |
|
|
printk("mediabay%d: content changed during sleep...\n", bay->index);
|
| 740 |
|
|
up(&bay->lock);
|
| 741 |
|
|
return 0;
|
| 742 |
|
|
}
|
| 743 |
|
|
set_mb_power(bay, 1);
|
| 744 |
|
|
bay->last_value = bay->content_id;
|
| 745 |
|
|
bay->value_count = msecs_to_jiffies(MB_STABLE_DELAY);
|
| 746 |
|
|
bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
|
| 747 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 748 |
|
|
bay->cd_retry = 0;
|
| 749 |
|
|
#endif
|
| 750 |
|
|
do {
|
| 751 |
|
|
msleep(MB_POLL_DELAY);
|
| 752 |
|
|
media_bay_step(bay->index);
|
| 753 |
|
|
} while((bay->state != mb_empty) &&
|
| 754 |
|
|
(bay->state != mb_up));
|
| 755 |
|
|
bay->sleeping = 0;
|
| 756 |
|
|
up(&bay->lock);
|
| 757 |
|
|
}
|
| 758 |
|
|
return 0;
|
| 759 |
|
|
}
|
| 760 |
|
|
|
| 761 |
|
|
|
| 762 |
|
|
/* Definitions of "ops" structures.
|
| 763 |
|
|
*/
|
| 764 |
|
|
static struct mb_ops ohare_mb_ops = {
|
| 765 |
|
|
.name = "Ohare",
|
| 766 |
|
|
.content = ohare_mb_content,
|
| 767 |
|
|
.power = ohare_mb_power,
|
| 768 |
|
|
.setup_bus = ohare_mb_setup_bus,
|
| 769 |
|
|
.un_reset = ohare_mb_un_reset,
|
| 770 |
|
|
.un_reset_ide = ohare_mb_un_reset_ide,
|
| 771 |
|
|
};
|
| 772 |
|
|
|
| 773 |
|
|
static struct mb_ops heathrow_mb_ops = {
|
| 774 |
|
|
.name = "Heathrow",
|
| 775 |
|
|
.content = heathrow_mb_content,
|
| 776 |
|
|
.power = heathrow_mb_power,
|
| 777 |
|
|
.setup_bus = heathrow_mb_setup_bus,
|
| 778 |
|
|
.un_reset = heathrow_mb_un_reset,
|
| 779 |
|
|
.un_reset_ide = heathrow_mb_un_reset_ide,
|
| 780 |
|
|
};
|
| 781 |
|
|
|
| 782 |
|
|
static struct mb_ops keylargo_mb_ops = {
|
| 783 |
|
|
.name = "KeyLargo",
|
| 784 |
|
|
.init = keylargo_mb_init,
|
| 785 |
|
|
.content = keylargo_mb_content,
|
| 786 |
|
|
.power = keylargo_mb_power,
|
| 787 |
|
|
.setup_bus = keylargo_mb_setup_bus,
|
| 788 |
|
|
.un_reset = keylargo_mb_un_reset,
|
| 789 |
|
|
.un_reset_ide = keylargo_mb_un_reset_ide,
|
| 790 |
|
|
};
|
| 791 |
|
|
|
| 792 |
|
|
/*
|
| 793 |
|
|
* It seems that the bit for the media-bay interrupt in the IRQ_LEVEL
|
| 794 |
|
|
* register is always set when there is something in the media bay.
|
| 795 |
|
|
* This causes problems for the interrupt code if we attach an interrupt
|
| 796 |
|
|
* handler to the media-bay interrupt, because it tends to go into
|
| 797 |
|
|
* an infinite loop calling the media bay interrupt handler.
|
| 798 |
|
|
* Therefore we do it all by polling the media bay once each tick.
|
| 799 |
|
|
*/
|
| 800 |
|
|
|
| 801 |
|
|
static struct of_device_id media_bay_match[] =
|
| 802 |
|
|
{
|
| 803 |
|
|
{
|
| 804 |
|
|
.name = "media-bay",
|
| 805 |
|
|
.compatible = "keylargo-media-bay",
|
| 806 |
|
|
.data = &keylargo_mb_ops,
|
| 807 |
|
|
},
|
| 808 |
|
|
{
|
| 809 |
|
|
.name = "media-bay",
|
| 810 |
|
|
.compatible = "heathrow-media-bay",
|
| 811 |
|
|
.data = &heathrow_mb_ops,
|
| 812 |
|
|
},
|
| 813 |
|
|
{
|
| 814 |
|
|
.name = "media-bay",
|
| 815 |
|
|
.compatible = "ohare-media-bay",
|
| 816 |
|
|
.data = &ohare_mb_ops,
|
| 817 |
|
|
},
|
| 818 |
|
|
{},
|
| 819 |
|
|
};
|
| 820 |
|
|
|
| 821 |
|
|
static struct macio_driver media_bay_driver =
|
| 822 |
|
|
{
|
| 823 |
|
|
.name = "media-bay",
|
| 824 |
|
|
.match_table = media_bay_match,
|
| 825 |
|
|
.probe = media_bay_attach,
|
| 826 |
|
|
.suspend = media_bay_suspend,
|
| 827 |
|
|
.resume = media_bay_resume
|
| 828 |
|
|
};
|
| 829 |
|
|
|
| 830 |
|
|
static int __init media_bay_init(void)
|
| 831 |
|
|
{
|
| 832 |
|
|
int i;
|
| 833 |
|
|
|
| 834 |
|
|
for (i=0; i<MAX_BAYS; i++) {
|
| 835 |
|
|
memset((char *)&media_bays[i], 0, sizeof(struct media_bay_info));
|
| 836 |
|
|
media_bays[i].content_id = -1;
|
| 837 |
|
|
#ifdef CONFIG_BLK_DEV_IDE
|
| 838 |
|
|
media_bays[i].cd_index = -1;
|
| 839 |
|
|
#endif
|
| 840 |
|
|
}
|
| 841 |
|
|
if (!machine_is(powermac))
|
| 842 |
|
|
return 0;
|
| 843 |
|
|
|
| 844 |
|
|
macio_register_driver(&media_bay_driver);
|
| 845 |
|
|
|
| 846 |
|
|
return 0;
|
| 847 |
|
|
}
|
| 848 |
|
|
|
| 849 |
|
|
device_initcall(media_bay_init);
|
