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!
This commit is contained in:
Linus Torvalds
851
drivers/macintosh/mediabay.c
Normal file
851
drivers/macintosh/mediabay.c
Normal file
@@ -0,0 +1,851 @@
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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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* 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/config.h>
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac
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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 __pmac 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 __pmac 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 __pmac 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 __pmac 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 __pmac 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 __pmac 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 __pmac 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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MBDBG("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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MBDBG("mediabay%d: powering down\n", bay->index);
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}
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bay->timer = msecs_to_jiffies(MB_POWER_DELAY);
|
||||
}
|
||||
|
||||
static void __pmac poll_media_bay(struct media_bay_info* bay)
|
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{
|
||||
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);
|
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}
|
||||
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);
|
||||
Reference in New Issue
Block a user