patch-2.4.21 linux-2.4.21/drivers/ide/ide-pmac.c
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- Lines: 1795
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.20/drivers/ide/ide-pmac.c
- Orig date:
2002-11-28 15:53:13.000000000 -0800
diff -urN linux-2.4.20/drivers/ide/ide-pmac.c linux-2.4.21/drivers/ide/ide-pmac.c
@@ -1,1794 +0,0 @@
-/*
- * linux/drivers/ide/ide-pmac.c
- *
- * Support for IDE interfaces on PowerMacs.
- * These IDE interfaces are memory-mapped and have a DBDMA channel
- * for doing DMA.
- *
- * Copyright (C) 1998-2001 Paul Mackerras & Ben. Herrenschmidt
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Some code taken from drivers/ide/ide-dma.c:
- *
- * Copyright (c) 1995-1998 Mark Lord
- *
- */
-#include <linux/config.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/ide.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/pci.h>
-
-#include <asm/prom.h>
-#include <asm/io.h>
-#include <asm/dbdma.h>
-#include <asm/ide.h>
-#include <asm/mediabay.h>
-#include <asm/pci-bridge.h>
-#include <asm/machdep.h>
-#include <asm/pmac_feature.h>
-#include <asm/sections.h>
-#include <asm/irq.h>
-#ifdef CONFIG_PMAC_PBOOK
-#include <linux/adb.h>
-#include <linux/pmu.h>
-#endif
-#include "ide_modes.h"
-
-extern char *ide_dmafunc_verbose(ide_dma_action_t dmafunc);
-extern void ide_do_request(ide_hwgroup_t *hwgroup, int masked_irq);
-
-#define IDE_PMAC_DEBUG
-
-#define DMA_WAIT_TIMEOUT 500
-
-struct pmac_ide_hwif {
- ide_ioreg_t regbase;
- int irq;
- int kind;
- int aapl_bus_id;
- struct device_node* node;
- u32 timings[2];
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
- /* Those fields are duplicating what is in hwif. We currently
- * can't use the hwif ones because of some assumptions that are
- * beeing done by the generic code about the kind of dma controller
- * and format of the dma table. This will have to be fixed though.
- */
- volatile struct dbdma_regs* dma_regs;
- struct dbdma_cmd* dma_table_cpu;
- dma_addr_t dma_table_dma;
- struct scatterlist* sg_table;
- int sg_nents;
- int sg_dma_direction;
-#endif
-
-} pmac_ide[MAX_HWIFS] __pmacdata;
-
-static int pmac_ide_count;
-
-enum {
- controller_ohare, /* OHare based */
- controller_heathrow, /* Heathrow/Paddington */
- controller_kl_ata3, /* KeyLargo ATA-3 */
- controller_kl_ata4, /* KeyLargo ATA-4 */
- controller_kl_ata4_80 /* KeyLargo ATA-4 with 80 conductor cable */
-};
-
-/*
- * Extra registers, both 32-bit little-endian
- */
-#define IDE_TIMING_CONFIG 0x200
-#define IDE_INTERRUPT 0x300
-
-/*
- * Timing configuration register definitions
- */
-
-/* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */
-#define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS)
-#define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS)
-#define IDE_SYSCLK_NS 30 /* 33Mhz cell */
-#define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */
-
-/* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on
- * 40 connector cable and to 4 on 80 connector one.
- * Clock unit is 15ns (66Mhz)
- *
- * 3 Values can be programmed:
- * - Write data setup, which appears to match the cycle time. They
- * also call it DIOW setup.
- * - Ready to pause time (from spec)
- * - Address setup. That one is weird. I don't see where exactly
- * it fits in UDMA cycles, I got it's name from an obscure piece
- * of commented out code in Darwin. They leave it to 0, we do as
- * well, despite a comment that would lead to think it has a
- * min value of 45ns.
- * Apple also add 60ns to the write data setup (or cycle time ?) on
- * reads.
- */
-#define TR_66_UDMA_MASK 0xfff00000
-#define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */
-#define TR_66_UDMA_ADDRSETUP_MASK 0xe0000000 /* Address setup */
-#define TR_66_UDMA_ADDRSETUP_SHIFT 29
-#define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */
-#define TR_66_UDMA_RDY2PAUS_SHIFT 25
-#define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */
-#define TR_66_UDMA_WRDATASETUP_SHIFT 21
-#define TR_66_MDMA_MASK 0x000ffc00
-#define TR_66_MDMA_RECOVERY_MASK 0x000f8000
-#define TR_66_MDMA_RECOVERY_SHIFT 15
-#define TR_66_MDMA_ACCESS_MASK 0x00007c00
-#define TR_66_MDMA_ACCESS_SHIFT 10
-#define TR_66_PIO_MASK 0x000003ff
-#define TR_66_PIO_RECOVERY_MASK 0x000003e0
-#define TR_66_PIO_RECOVERY_SHIFT 5
-#define TR_66_PIO_ACCESS_MASK 0x0000001f
-#define TR_66_PIO_ACCESS_SHIFT 0
-
-/* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
- * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
- *
- * The access time and recovery time can be programmed. Some older
- * Darwin code base limit OHare to 150ns cycle time. I decided to do
- * the same here fore safety against broken old hardware ;)
- * The HalfTick bit, when set, adds half a clock (15ns) to the access
- * time and removes one from recovery. It's not supported on KeyLargo
- * implementation afaik. The E bit appears to be set for PIO mode 0 and
- * is used to reach long timings used in this mode.
- */
-#define TR_33_MDMA_MASK 0x003ff800
-#define TR_33_MDMA_RECOVERY_MASK 0x001f0000
-#define TR_33_MDMA_RECOVERY_SHIFT 16
-#define TR_33_MDMA_ACCESS_MASK 0x0000f800
-#define TR_33_MDMA_ACCESS_SHIFT 11
-#define TR_33_MDMA_HALFTICK 0x00200000
-#define TR_33_PIO_MASK 0x000007ff
-#define TR_33_PIO_E 0x00000400
-#define TR_33_PIO_RECOVERY_MASK 0x000003e0
-#define TR_33_PIO_RECOVERY_SHIFT 5
-#define TR_33_PIO_ACCESS_MASK 0x0000001f
-#define TR_33_PIO_ACCESS_SHIFT 0
-
-/*
- * Interrupt register definitions
- */
-#define IDE_INTR_DMA 0x80000000
-#define IDE_INTR_DEVICE 0x40000000
-
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
-
-/* Rounded Multiword DMA timings
- *
- * I gave up finding a generic formula for all controller
- * types and instead, built tables based on timing values
- * used by Apple in Darwin's implementation.
- */
-struct mdma_timings_t {
- int accessTime;
- int recoveryTime;
- int cycleTime;
-};
-
-struct mdma_timings_t mdma_timings_33[] __pmacdata =
-{
- { 240, 240, 480 },
- { 180, 180, 360 },
- { 135, 135, 270 },
- { 120, 120, 240 },
- { 105, 105, 210 },
- { 90, 90, 180 },
- { 75, 75, 150 },
- { 75, 45, 120 },
- { 0, 0, 0 }
-};
-
-struct mdma_timings_t mdma_timings_33k[] __pmacdata =
-{
- { 240, 240, 480 },
- { 180, 180, 360 },
- { 150, 150, 300 },
- { 120, 120, 240 },
- { 90, 120, 210 },
- { 90, 90, 180 },
- { 90, 60, 150 },
- { 90, 30, 120 },
- { 0, 0, 0 }
-};
-
-struct mdma_timings_t mdma_timings_66[] __pmacdata =
-{
- { 240, 240, 480 },
- { 180, 180, 360 },
- { 135, 135, 270 },
- { 120, 120, 240 },
- { 105, 105, 210 },
- { 90, 90, 180 },
- { 90, 75, 165 },
- { 75, 45, 120 },
- { 0, 0, 0 }
-};
-
-/* Ultra DMA timings (rounded) */
-struct {
- int addrSetup; /* ??? */
- int rdy2pause;
- int wrDataSetup;
-} udma_timings[] __pmacdata =
-{
- { 0, 180, 120 }, /* Mode 0 */
- { 0, 150, 90 }, /* 1 */
- { 0, 120, 60 }, /* 2 */
- { 0, 90, 45 }, /* 3 */
- { 0, 90, 30 } /* 4 */
-};
-
-/* allow up to 256 DBDMA commands per xfer */
-#define MAX_DCMDS 256
-
-/* Wait 2s for disk to answer on IDE bus after
- * enable operation.
- * NOTE: There is at least one case I know of a disk that needs about 10sec
- * before anwering on the bus. I beleive we could add a kernel command
- * line arg to override this delay for such cases.
- */
-#define IDE_WAKEUP_DELAY_MS 2000
-
-static void pmac_ide_setup_dma(struct device_node *np, int ix);
-static int pmac_ide_dmaproc(ide_dma_action_t func, ide_drive_t *drive);
-static int pmac_ide_build_dmatable(ide_drive_t *drive, int ix, int wr);
-static int pmac_ide_tune_chipset(ide_drive_t *drive, byte speed);
-static void pmac_ide_tuneproc(ide_drive_t *drive, byte pio);
-static void pmac_ide_selectproc(ide_drive_t *drive);
-
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
-
-#ifdef CONFIG_PMAC_PBOOK
-static int idepmac_notify_sleep(struct pmu_sleep_notifier *self, int when);
-struct pmu_sleep_notifier idepmac_sleep_notifier = {
- idepmac_notify_sleep, SLEEP_LEVEL_BLOCK,
-};
-#endif /* CONFIG_PMAC_PBOOK */
-
-static int pmac_ide_notify_reboot(struct notifier_block *, unsigned long, void *);
-static struct notifier_block pmac_ide_reboot_notifier = {
- pmac_ide_notify_reboot,
- NULL,
- 0
-};
-
-static int __pmac
-pmac_ide_find(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = HWIF(drive);
- ide_ioreg_t base;
- int i;
-
- for (i=0; i<pmac_ide_count; i++) {
- base = pmac_ide[i].regbase;
- if (base && base == hwif->io_ports[0])
- return i;
- }
- return -1;
-}
-
-/*
- * N.B. this can't be an initfunc, because the media-bay task can
- * call ide_[un]register at any time.
- */
-void __pmac
-pmac_ide_init_hwif_ports(hw_regs_t *hw,
- ide_ioreg_t data_port, ide_ioreg_t ctrl_port,
- int *irq)
-{
- int i, ix;
-
- if (data_port == 0)
- return;
-
- for (ix = 0; ix < MAX_HWIFS; ++ix)
- if (data_port == pmac_ide[ix].regbase)
- break;
-
- if (ix >= MAX_HWIFS) {
- /* Probably a PCI interface... */
- for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; ++i)
- hw->io_ports[i] = data_port + i - IDE_DATA_OFFSET;
- hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
- return;
- }
-
- for (i = 0; i < 8; ++i)
- hw->io_ports[i] = data_port + i * 0x10;
- hw->io_ports[8] = data_port + 0x160;
-
- if (irq != NULL)
- *irq = pmac_ide[ix].irq;
-
- ide_hwifs[ix].tuneproc = pmac_ide_tuneproc;
- ide_hwifs[ix].selectproc = pmac_ide_selectproc;
- ide_hwifs[ix].speedproc = &pmac_ide_tune_chipset;
- if (pmac_ide[ix].dma_regs && pmac_ide[ix].dma_table_cpu) {
- ide_hwifs[ix].dmaproc = &pmac_ide_dmaproc;
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC_AUTO
- if (!noautodma)
- ide_hwifs[ix].autodma = 1;
-#endif
- }
-}
-
-#if 0
-/* This one could be later extended to handle CMD IDE and be used by some kind
- * of /proc interface. I want to be able to get the devicetree path of a block
- * device for yaboot configuration
- */
-struct device_node*
-pmac_ide_get_devnode(ide_drive_t *drive)
-{
- int i = pmac_ide_find(drive);
- if (i < 0)
- return NULL;
- return pmac_ide[i].node;
-}
-#endif
-
-/* Setup timings for the selected drive (master/slave). I still need to verify if this
- * is enough, I beleive selectproc will be called whenever an IDE command is started,
- * but... */
-static void __pmac
-pmac_ide_selectproc(ide_drive_t *drive)
-{
- int i = pmac_ide_find(drive);
- if (i < 0)
- return;
-
- if (drive->select.b.unit & 0x01)
- out_le32((unsigned *)(IDE_DATA_REG + IDE_TIMING_CONFIG + _IO_BASE),
- pmac_ide[i].timings[1]);
- else
- out_le32((unsigned *)(IDE_DATA_REG + IDE_TIMING_CONFIG + _IO_BASE),
- pmac_ide[i].timings[0]);
- (void)in_le32((unsigned *)(IDE_DATA_REG + IDE_TIMING_CONFIG + _IO_BASE));
-}
-
-
-/* Note: We don't use the generic routine here because for some
- * yet unexplained reasons, it cause some media-bay CD-ROMs to
- * lockup the bus. Strangely, this new version of the code is
- * almost identical to the generic one and works, I've not yet
- * managed to figure out what bit is causing the lockup in the
- * generic code, possibly a timing issue...
- *
- * --BenH
- */
-static int __pmac
-wait_for_ready(ide_drive_t *drive)
-{
- /* Timeout bumped for some powerbooks */
- int timeout = 2000;
- byte stat;
-
- while(--timeout) {
- stat = GET_STAT();
- if(!(stat & BUSY_STAT)) {
- if (drive->ready_stat == 0)
- break;
- else if((stat & drive->ready_stat) || (stat & ERR_STAT))
- break;
- }
- mdelay(1);
- }
- if((stat & ERR_STAT) || timeout <= 0) {
- if (stat & ERR_STAT) {
- printk(KERN_ERR "ide_pmac: wait_for_ready, error status: %x\n", stat);
- }
- return 1;
- }
- return 0;
-}
-
-static int __pmac
-pmac_ide_do_setfeature(ide_drive_t *drive, byte command)
-{
- int result = 1;
- ide_hwif_t *hwif = HWIF(drive);
-
- disable_irq(hwif->irq); /* disable_irq_nosync ?? */
- udelay(1);
- SELECT_DRIVE(HWIF(drive), drive);
- SELECT_MASK(HWIF(drive), drive, 0);
- udelay(1);
- (void)GET_STAT(); /* Get rid of pending error state */
- if(wait_for_ready(drive)) {
- printk(KERN_ERR "pmac_ide_do_setfeature disk not ready before SET_FEATURE!\n");
- goto out;
- }
- udelay(10);
- OUT_BYTE(drive->ctl | 2, IDE_CONTROL_REG);
- OUT_BYTE(command, IDE_NSECTOR_REG);
- OUT_BYTE(SETFEATURES_XFER, IDE_FEATURE_REG);
- OUT_BYTE(WIN_SETFEATURES, IDE_COMMAND_REG);
- udelay(1);
- result = wait_for_ready(drive);
- OUT_BYTE(drive->ctl, IDE_CONTROL_REG);
- if (result)
- printk(KERN_ERR "pmac_ide_do_setfeature disk not ready after SET_FEATURE !\n");
-out:
- SELECT_MASK(HWIF(drive), drive, 0);
- if (result == 0) {
- drive->id->dma_ultra &= ~0xFF00;
- drive->id->dma_mword &= ~0x0F00;
- drive->id->dma_1word &= ~0x0F00;
- switch(command) {
- case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
- case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
- case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
- case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
- case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
- case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
- case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
- case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
- case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
- case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
- case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
- case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
- case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
- case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
- default: break;
- }
- }
- enable_irq(hwif->irq);
- return result;
-}
-
-/* Calculate PIO timings */
-static void __pmac
-pmac_ide_tuneproc(ide_drive_t *drive, byte pio)
-{
- ide_pio_data_t d;
- int i;
- u32 *timings;
- unsigned accessTicks, recTicks;
- unsigned accessTime, recTime;
-
- i = pmac_ide_find(drive);
- if (i < 0)
- return;
-
- pio = ide_get_best_pio_mode(drive, pio, 4, &d);
- accessTicks = SYSCLK_TICKS(ide_pio_timings[pio].active_time);
- if (drive->select.b.unit & 0x01)
- timings = &pmac_ide[i].timings[1];
- else
- timings = &pmac_ide[i].timings[0];
-
- recTime = d.cycle_time - ide_pio_timings[pio].active_time
- - ide_pio_timings[pio].setup_time;
- recTime = max(recTime, 150U);
- accessTime = ide_pio_timings[pio].active_time;
- accessTime = max(accessTime, 150U);
- if (pmac_ide[i].kind == controller_kl_ata4 ||
- pmac_ide[i].kind == controller_kl_ata4_80) {
- /* 66Mhz cell */
- accessTicks = SYSCLK_TICKS_66(accessTime);
- accessTicks = min(accessTicks, 0x1fU);
- recTicks = SYSCLK_TICKS_66(recTime);
- recTicks = min(recTicks, 0x1fU);
- *timings = ((*timings) & ~TR_66_PIO_MASK) |
- (accessTicks << TR_66_PIO_ACCESS_SHIFT) |
- (recTicks << TR_66_PIO_RECOVERY_SHIFT);
- } else {
- /* 33Mhz cell */
- int ebit = 0;
- accessTicks = SYSCLK_TICKS(accessTime);
- accessTicks = min(accessTicks, 0x1fU);
- accessTicks = max(accessTicks, 4U);
- recTicks = SYSCLK_TICKS(recTime);
- recTicks = min(recTicks, 0x1fU);
- recTicks = max(recTicks, 5U) - 4;
- if (recTicks > 9) {
- recTicks--; /* guess, but it's only for PIO0, so... */
- ebit = 1;
- }
- *timings = ((*timings) & ~TR_33_PIO_MASK) |
- (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
- (recTicks << TR_33_PIO_RECOVERY_SHIFT);
- if (ebit)
- *timings |= TR_33_PIO_E;
- }
-
-#ifdef IDE_PMAC_DEBUG
- printk(KERN_ERR "ide_pmac: Set PIO timing for mode %d, reg: 0x%08x\n",
- pio, *timings);
-#endif
-
- if (drive->select.all == IN_BYTE(IDE_SELECT_REG))
- pmac_ide_selectproc(drive);
-}
-
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
-static int __pmac
-set_timings_udma(u32 *timings, byte speed)
-{
- unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
-
- rdyToPauseTicks = SYSCLK_TICKS_66(udma_timings[speed & 0xf].rdy2pause);
- wrDataSetupTicks = SYSCLK_TICKS_66(udma_timings[speed & 0xf].wrDataSetup);
- addrTicks = SYSCLK_TICKS_66(udma_timings[speed & 0xf].addrSetup);
-
- *timings = ((*timings) & ~(TR_66_UDMA_MASK | TR_66_MDMA_MASK)) |
- (wrDataSetupTicks << TR_66_UDMA_WRDATASETUP_SHIFT) |
- (rdyToPauseTicks << TR_66_UDMA_RDY2PAUS_SHIFT) |
- (addrTicks <<TR_66_UDMA_ADDRSETUP_SHIFT) |
- TR_66_UDMA_EN;
-#ifdef IDE_PMAC_DEBUG
- printk(KERN_ERR "ide_pmac: Set UDMA timing for mode %d, reg: 0x%08x\n",
- speed & 0xf, *timings);
-#endif
-
- return 0;
-}
-
-static int __pmac
-set_timings_mdma(int intf_type, u32 *timings, byte speed, int drive_cycle_time)
-{
- int cycleTime, accessTime, recTime;
- unsigned accessTicks, recTicks;
- struct mdma_timings_t* tm;
- int i;
-
- /* Get default cycle time for mode */
- switch(speed & 0xf) {
- case 0: cycleTime = 480; break;
- case 1: cycleTime = 150; break;
- case 2: cycleTime = 120; break;
- default:
- return -1;
- }
- /* Adjust for drive */
- if (drive_cycle_time && drive_cycle_time > cycleTime)
- cycleTime = drive_cycle_time;
- /* OHare limits according to some old Apple sources */
- if ((intf_type == controller_ohare) && (cycleTime < 150))
- cycleTime = 150;
- /* Get the proper timing array for this controller */
- switch(intf_type) {
- case controller_kl_ata4:
- case controller_kl_ata4_80:
- tm = mdma_timings_66;
- break;
- case controller_kl_ata3:
- tm = mdma_timings_33k;
- break;
- default:
- tm = mdma_timings_33;
- break;
- }
- /* Lookup matching access & recovery times */
- i = -1;
- for (;;) {
- if (tm[i+1].cycleTime < cycleTime)
- break;
- i++;
- }
- if (i < 0)
- return -1;
- cycleTime = tm[i].cycleTime;
- accessTime = tm[i].accessTime;
- recTime = tm[i].recoveryTime;
-
-#ifdef IDE_PMAC_DEBUG
- printk(KERN_ERR "ide_pmac: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
- cycleTime, accessTime, recTime);
-#endif
- if (intf_type == controller_kl_ata4 || intf_type == controller_kl_ata4_80) {
- /* 66Mhz cell */
- accessTicks = SYSCLK_TICKS_66(accessTime);
- accessTicks = min(accessTicks, 0x1fU);
- accessTicks = max(accessTicks, 0x1U);
- recTicks = SYSCLK_TICKS_66(recTime);
- recTicks = min(recTicks, 0x1fU);
- recTicks = max(recTicks, 0x3U);
- /* Clear out mdma bits and disable udma */
- *timings = ((*timings) & ~(TR_66_MDMA_MASK | TR_66_UDMA_MASK)) |
- (accessTicks << TR_66_MDMA_ACCESS_SHIFT) |
- (recTicks << TR_66_MDMA_RECOVERY_SHIFT);
- } else if (intf_type == controller_kl_ata3) {
- /* 33Mhz cell on KeyLargo */
- accessTicks = SYSCLK_TICKS(accessTime);
- accessTicks = max(accessTicks, 1U);
- accessTicks = min(accessTicks, 0x1fU);
- accessTime = accessTicks * IDE_SYSCLK_NS;
- recTicks = SYSCLK_TICKS(recTime);
- recTicks = max(recTicks, 1U);
- recTicks = min(recTicks, 0x1fU);
- *timings = ((*timings) & ~TR_33_MDMA_MASK) |
- (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
- (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
- } else {
- /* 33Mhz cell on others */
- int halfTick = 0;
- int origAccessTime = accessTime;
- int origRecTime = recTime;
-
- accessTicks = SYSCLK_TICKS(accessTime);
- accessTicks = max(accessTicks, 1U);
- accessTicks = min(accessTicks, 0x1fU);
- accessTime = accessTicks * IDE_SYSCLK_NS;
- recTicks = SYSCLK_TICKS(recTime);
- recTicks = max(recTicks, 2U) - 1;
- recTicks = min(recTicks, 0x1fU);
- recTime = (recTicks + 1) * IDE_SYSCLK_NS;
- if ((accessTicks > 1) &&
- ((accessTime - IDE_SYSCLK_NS/2) >= origAccessTime) &&
- ((recTime - IDE_SYSCLK_NS/2) >= origRecTime)) {
- halfTick = 1;
- accessTicks--;
- }
- *timings = ((*timings) & ~TR_33_MDMA_MASK) |
- (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
- (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
- if (halfTick)
- *timings |= TR_33_MDMA_HALFTICK;
- }
-#ifdef IDE_PMAC_DEBUG
- printk(KERN_ERR "ide_pmac: Set MDMA timing for mode %d, reg: 0x%08x\n",
- speed & 0xf, *timings);
-#endif
- return 0;
-}
-#endif /* #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC */
-
-/* You may notice we don't use this function on normal operation,
- * our, normal mdma function is supposed to be more precise
- */
-static int __pmac
-pmac_ide_tune_chipset (ide_drive_t *drive, byte speed)
-{
- int intf = pmac_ide_find(drive);
- int unit = (drive->select.b.unit & 0x01);
- int ret = 0;
- u32 *timings;
-
- if (intf < 0)
- return 1;
-
- timings = &pmac_ide[intf].timings[unit];
-
- switch(speed) {
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
- case XFER_UDMA_4:
- case XFER_UDMA_3:
- if (pmac_ide[intf].kind != controller_kl_ata4_80)
- return 1;
- case XFER_UDMA_2:
- case XFER_UDMA_1:
- case XFER_UDMA_0:
- if (pmac_ide[intf].kind != controller_kl_ata4 &&
- pmac_ide[intf].kind != controller_kl_ata4_80)
- return 1;
- ret = set_timings_udma(timings, speed);
- break;
- case XFER_MW_DMA_2:
- case XFER_MW_DMA_1:
- case XFER_MW_DMA_0:
- ret = set_timings_mdma(pmac_ide[intf].kind, timings, speed, 0);
- break;
- case XFER_SW_DMA_2:
- case XFER_SW_DMA_1:
- case XFER_SW_DMA_0:
- return 1;
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
- case XFER_PIO_4:
- case XFER_PIO_3:
- case XFER_PIO_2:
- case XFER_PIO_1:
- case XFER_PIO_0:
- pmac_ide_tuneproc(drive, speed & 0x07);
- break;
- default:
- ret = 1;
- }
- if (ret)
- return ret;
-
- ret = pmac_ide_do_setfeature(drive, speed);
- if (ret)
- return ret;
-
- pmac_ide_selectproc(drive);
- drive->current_speed = speed;
-
- return 0;
-}
-
-static void __pmac
-sanitize_timings(int i)
-{
- unsigned value;
-
- switch(pmac_ide[i].kind) {
- case controller_kl_ata4:
- case controller_kl_ata4_80:
- value = 0x0008438c;
- break;
- case controller_kl_ata3:
- value = 0x00084526;
- break;
- case controller_heathrow:
- case controller_ohare:
- default:
- value = 0x00074526;
- break;
- }
- pmac_ide[i].timings[0] = pmac_ide[i].timings[1] = value;
-}
-
-ide_ioreg_t __pmac
-pmac_ide_get_base(int index)
-{
- return pmac_ide[index].regbase;
-}
-
-int __pmac
-pmac_ide_check_base(ide_ioreg_t base)
-{
- int ix;
-
- for (ix = 0; ix < MAX_HWIFS; ++ix)
- if (base == pmac_ide[ix].regbase)
- return ix;
- return -1;
-}
-
-int __pmac
-pmac_ide_get_irq(ide_ioreg_t base)
-{
- int ix;
-
- for (ix = 0; ix < MAX_HWIFS; ++ix)
- if (base == pmac_ide[ix].regbase)
- return pmac_ide[ix].irq;
- return 0;
-}
-
-static int ide_majors[] __pmacdata = { 3, 22, 33, 34, 56, 57 };
-
-kdev_t __init
-pmac_find_ide_boot(char *bootdevice, int n)
-{
- int i;
-
- /*
- * Look through the list of IDE interfaces for this one.
- */
- for (i = 0; i < pmac_ide_count; ++i) {
- char *name;
- if (!pmac_ide[i].node || !pmac_ide[i].node->full_name)
- continue;
- name = pmac_ide[i].node->full_name;
- if (memcmp(name, bootdevice, n) == 0 && name[n] == 0) {
- /* XXX should cope with the 2nd drive as well... */
- return MKDEV(ide_majors[i], 0);
- }
- }
-
- return 0;
-}
-
-void __init
-pmac_ide_probe(void)
-{
- struct device_node *np;
- int i;
- struct device_node *atas;
- struct device_node *p, **pp, *removables, **rp;
- unsigned long base;
- int irq, big_delay;
- ide_hwif_t *hwif;
-
- if (_machine != _MACH_Pmac)
- return;
- pp = &atas;
- rp = &removables;
- p = find_devices("ATA");
- if (p == NULL)
- p = find_devices("IDE");
- if (p == NULL)
- p = find_type_devices("ide");
- if (p == NULL)
- p = find_type_devices("ata");
- /* Move removable devices such as the media-bay CDROM
- on the PB3400 to the end of the list. */
- for (; p != NULL; p = p->next) {
- if (p->parent && p->parent->type
- && strcasecmp(p->parent->type, "media-bay") == 0) {
- *rp = p;
- rp = &p->next;
- } else {
- *pp = p;
- pp = &p->next;
- }
- }
- *rp = NULL;
- *pp = removables;
- big_delay = 0;
-
- for (i = 0, np = atas; i < MAX_HWIFS && np != NULL; np = np->next) {
- struct device_node *tp;
- struct pmac_ide_hwif* pmhw;
- int *bidp;
- int in_bay = 0;
- u8 pbus, pid;
- struct pci_dev *pdev = NULL;
-
- /*
- * If this node is not under a mac-io or dbdma node,
- * leave it to the generic PCI driver.
- */
- for (tp = np->parent; tp != 0; tp = tp->parent)
- if (tp->type && (strcmp(tp->type, "mac-io") == 0
- || strcmp(tp->type, "dbdma") == 0))
- break;
- if (tp == 0)
- continue;
-
- if (np->n_addrs == 0) {
- printk(KERN_WARNING "ide: no address for device %s\n",
- np->full_name);
- continue;
- }
-
- /* We need to find the pci_dev of the mac-io holding the
- * IDE interface
- */
- if (pci_device_from_OF_node(tp, &pbus, &pid) == 0)
- pdev = pci_find_slot(pbus, pid);
- if (pdev == NULL)
- printk(KERN_WARNING "ide: no PCI host for device %s, DMA disabled\n",
- np->full_name);
-
- /*
- * If this slot is taken (e.g. by ide-pci.c) try the next one.
- */
- while (i < MAX_HWIFS
- && ide_hwifs[i].io_ports[IDE_DATA_OFFSET] != 0)
- ++i;
- if (i >= MAX_HWIFS)
- break;
- pmhw = &pmac_ide[i];
-
- /*
- * Some older OFs have bogus sizes, causing request_OF_resource
- * to fail. We fix them up here
- */
- if (np->addrs[0].size > 0x1000)
- np->addrs[0].size = 0x1000;
- if (np->n_addrs > 1 && np->addrs[1].size > 0x100)
- np->addrs[1].size = 0x100;
-
- if (request_OF_resource(np, 0, " (mac-io IDE IO)") == NULL) {
- printk(KERN_ERR "ide-pmac(%s): can't request IO resource !\n", np->name);
- continue;
- }
-
- base = (unsigned long) ioremap(np->addrs[0].address, 0x400) - _IO_BASE;
-
- /* XXX This is bogus. Should be fixed in the registry by checking
- the kind of host interrupt controller, a bit like gatwick
- fixes in irq.c
- */
- if (np->n_intrs == 0) {
- printk(KERN_WARNING "ide: no intrs for device %s, using 13\n",
- np->full_name);
- irq = 13;
- } else {
- irq = np->intrs[0].line;
- }
- pmhw->regbase = base;
- pmhw->irq = irq;
- pmhw->node = np;
- if (device_is_compatible(np, "keylargo-ata")) {
- if (strcmp(np->name, "ata-4") == 0)
- pmhw->kind = controller_kl_ata4;
- else
- pmhw->kind = controller_kl_ata3;
- } else if (device_is_compatible(np, "heathrow-ata"))
- pmhw->kind = controller_heathrow;
- else
- pmhw->kind = controller_ohare;
-
- bidp = (int *)get_property(np, "AAPL,bus-id", NULL);
- pmhw->aapl_bus_id = bidp ? *bidp : 0;
-
- if (pmhw->kind == controller_kl_ata4) {
- char* cable = get_property(np, "cable-type", NULL);
- if (cable && !strncmp(cable, "80-", 3))
- pmhw->kind = controller_kl_ata4_80;
- }
-
- /* Make sure we have sane timings */
- sanitize_timings(i);
-
- if (np->parent && np->parent->name
- && strcasecmp(np->parent->name, "media-bay") == 0) {
-#ifdef CONFIG_PMAC_PBOOK
- media_bay_set_ide_infos(np->parent,base,irq,i);
-#endif /* CONFIG_PMAC_PBOOK */
- in_bay = 1;
- if (!bidp)
- pmhw->aapl_bus_id = 1;
- } else if (pmhw->kind == controller_ohare) {
- /* The code below is having trouble on some ohare machines
- * (timing related ?). Until I can put my hand on one of these
- * units, I keep the old way
- */
- ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
- } else {
- /* This is necessary to enable IDE when net-booting */
- printk(KERN_INFO "pmac_ide: enabling IDE bus ID %d\n",
- pmhw->aapl_bus_id);
- ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmhw->aapl_bus_id, 1);
- ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmhw->aapl_bus_id, 1);
- mdelay(10);
- ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmhw->aapl_bus_id, 0);
- big_delay = 1;
- }
-
- hwif = &ide_hwifs[i];
- pmac_ide_init_hwif_ports(&hwif->hw, base, 0, &hwif->irq);
- memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
- hwif->chipset = ide_pmac;
- hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET] || in_bay;
- hwif->udma_four = (pmhw->kind == controller_kl_ata4_80);
- hwif->pci_dev = pdev;
- hwif->drives[0].unmask = 1;
- hwif->drives[1].unmask = 1;
-#ifdef CONFIG_PMAC_PBOOK
- if (in_bay && check_media_bay_by_base(base, MB_CD) == 0)
- hwif->noprobe = 0;
-#endif /* CONFIG_PMAC_PBOOK */
-
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
- if (np->n_addrs >= 2) {
- /* has a DBDMA controller channel */
- pmac_ide_setup_dma(np, i);
- }
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
-
- ++i;
- }
- pmac_ide_count = i;
- if (big_delay)
- mdelay(IDE_WAKEUP_DELAY_MS);
-
-#ifdef CONFIG_PMAC_PBOOK
- pmu_register_sleep_notifier(&idepmac_sleep_notifier);
-#endif /* CONFIG_PMAC_PBOOK */
- register_reboot_notifier(&pmac_ide_reboot_notifier);
-}
-
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
-
-static void __init
-pmac_ide_setup_dma(struct device_node *np, int ix)
-{
- struct pmac_ide_hwif *pmif = &pmac_ide[ix];
-
- if (request_OF_resource(np, 1, " (mac-io IDE DMA)") == NULL) {
- printk(KERN_ERR "ide-pmac(%s): can't request DMA resource !\n", np->name);
- return;
- }
-
- pmif->dma_regs =
- (volatile struct dbdma_regs*)ioremap(np->addrs[1].address, 0x200);
-
- /*
- * Allocate space for the DBDMA commands.
- * The +2 is +1 for the stop command and +1 to allow for
- * aligning the start address to a multiple of 16 bytes.
- */
- pmif->dma_table_cpu = (struct dbdma_cmd*)pci_alloc_consistent(
- ide_hwifs[ix].pci_dev,
- (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
- &pmif->dma_table_dma);
- if (pmif->dma_table_cpu == NULL) {
- printk(KERN_ERR "%s: unable to allocate DMA command list\n",
- ide_hwifs[ix].name);
- return;
- }
-
- pmif->sg_table = kmalloc(sizeof(struct scatterlist) * MAX_DCMDS,
- GFP_KERNEL);
- if (pmif->sg_table == NULL) {
- pci_free_consistent( ide_hwifs[ix].pci_dev,
- (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
- pmif->dma_table_cpu, pmif->dma_table_dma);
- return;
- }
- ide_hwifs[ix].dmaproc = &pmac_ide_dmaproc;
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC_AUTO
- if (!noautodma)
- ide_hwifs[ix].autodma = 1;
-#endif
-}
-
-static int
-pmac_ide_build_sglist (int ix, struct request *rq)
-{
- ide_hwif_t *hwif = &ide_hwifs[ix];
- struct pmac_ide_hwif *pmif = &pmac_ide[ix];
- struct buffer_head *bh;
- struct scatterlist *sg = pmif->sg_table;
- unsigned long lastdataend = ~0UL;
- int nents = 0;
-
- if (hwif->sg_dma_active)
- BUG();
-
- if (rq->cmd == READ)
- pmif->sg_dma_direction = PCI_DMA_FROMDEVICE;
- else
- pmif->sg_dma_direction = PCI_DMA_TODEVICE;
-
- bh = rq->bh;
- do {
- struct scatterlist *sge;
- unsigned int size = bh->b_size;
-
- /* continue segment from before? */
- if (bh_phys(bh) == lastdataend) {
- sg[nents-1].length += size;
- lastdataend += size;
- continue;
- }
-
- /* start new segment */
- if (nents >= MAX_DCMDS)
- return 0;
-
- sge = &sg[nents];
- memset(sge, 0, sizeof(*sge));
-
- if (bh->b_page) {
- sge->page = bh->b_page;
- sge->offset = bh_offset(bh);
- } else {
- if ((unsigned long)bh->b_data < PAGE_SIZE)
- BUG();
- sge->address = bh->b_data;
- }
- sge->length = size;
- lastdataend = bh_phys(bh) + size;
- nents++;
- } while ((bh = bh->b_reqnext) != NULL);
-
- return pci_map_sg(hwif->pci_dev, sg, nents, pmif->sg_dma_direction);
-}
-
-static int
-pmac_ide_raw_build_sglist (int ix, struct request *rq)
-{
- ide_hwif_t *hwif = &ide_hwifs[ix];
- struct pmac_ide_hwif *pmif = &pmac_ide[ix];
- struct scatterlist *sg = hwif->sg_table;
- int nents = 0;
- ide_task_t *args = rq->special;
- unsigned char *virt_addr = rq->buffer;
- int sector_count = rq->nr_sectors;
-
-// if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_WRITEDMA) ||
-// (args->tfRegister[IDE_COMMAND_OFFSET] == WIN_WRITEDMA_EXT))
- if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
- pmif->sg_dma_direction = PCI_DMA_TODEVICE;
- else
- pmif->sg_dma_direction = PCI_DMA_FROMDEVICE;
-
- if (sector_count > 128) {
- memset(&sg[nents], 0, sizeof(*sg));
- sg[nents].address = virt_addr;
- sg[nents].length = 128 * SECTOR_SIZE;
- nents++;
- virt_addr = virt_addr + (128 * SECTOR_SIZE);
- sector_count -= 128;
- }
- memset(&sg[nents], 0, sizeof(*sg));
- sg[nents].address = virt_addr;
- sg[nents].length = sector_count * SECTOR_SIZE;
- nents++;
-
- return pci_map_sg(hwif->pci_dev, sg, nents, pmif->sg_dma_direction);
-}
-
-/*
- * pmac_ide_build_dmatable builds the DBDMA command list
- * for a transfer and sets the DBDMA channel to point to it.
- */
-static int
-pmac_ide_build_dmatable(ide_drive_t *drive, int ix, int wr)
-{
- struct dbdma_cmd *table;
- int i, count = 0;
- struct request *rq = HWGROUP(drive)->rq;
- volatile struct dbdma_regs *dma = pmac_ide[ix].dma_regs;
- struct scatterlist *sg;
-
- /* DMA table is already aligned */
- table = (struct dbdma_cmd *) pmac_ide[ix].dma_table_cpu;
-
- /* Make sure DMA controller is stopped (necessary ?) */
- out_le32(&dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
- while (in_le32(&dma->status) & RUN)
- udelay(1);
-
- /* Build sglist */
- if (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASKFILE)
- pmac_ide[ix].sg_nents = i = pmac_ide_raw_build_sglist(ix, rq);
- else
- pmac_ide[ix].sg_nents = i = pmac_ide_build_sglist(ix, rq);
- if (!i)
- return 0;
-
- /* Build DBDMA commands list */
- sg = pmac_ide[ix].sg_table;
- while (i) {
- u32 cur_addr;
- u32 cur_len;
-
- cur_addr = sg_dma_address(sg);
- cur_len = sg_dma_len(sg);
-
- while (cur_len) {
- unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
-
- if (++count >= MAX_DCMDS) {
- printk(KERN_WARNING "%s: DMA table too small\n",
- drive->name);
- return 0; /* revert to PIO for this request */
- }
- st_le16(&table->command, wr? OUTPUT_MORE: INPUT_MORE);
- st_le16(&table->req_count, tc);
- st_le32(&table->phy_addr, cur_addr);
- table->cmd_dep = 0;
- table->xfer_status = 0;
- table->res_count = 0;
- cur_addr += tc;
- cur_len -= tc;
- ++table;
- }
- sg++;
- i--;
- }
-
- /* convert the last command to an input/output last command */
- if (count)
- st_le16(&table[-1].command, wr? OUTPUT_LAST: INPUT_LAST);
- else
- printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
-
- /* add the stop command to the end of the list */
- memset(table, 0, sizeof(struct dbdma_cmd));
- out_le16(&table->command, DBDMA_STOP);
-
- out_le32(&dma->cmdptr, pmac_ide[ix].dma_table_dma);
- return 1;
-}
-
-/* Teardown mappings after DMA has completed. */
-static void
-pmac_ide_destroy_dmatable (ide_drive_t *drive, int ix)
-{
- struct pci_dev *dev = HWIF(drive)->pci_dev;
- struct scatterlist *sg = pmac_ide[ix].sg_table;
- int nents = pmac_ide[ix].sg_nents;
-
- if (nents) {
- pci_unmap_sg(dev, sg, nents, pmac_ide[ix].sg_dma_direction);
- pmac_ide[ix].sg_nents = 0;
- }
-}
-
-static __inline__ unsigned char
-dma_bits_to_command(unsigned char bits)
-{
- if(bits & 0x04)
- return XFER_MW_DMA_2;
- if(bits & 0x02)
- return XFER_MW_DMA_1;
- if(bits & 0x01)
- return XFER_MW_DMA_0;
- return 0;
-}
-
-static __inline__ unsigned char
-udma_bits_to_command(unsigned char bits, int high_speed)
-{
- if (high_speed) {
- if(bits & 0x10)
- return XFER_UDMA_4;
- if(bits & 0x08)
- return XFER_UDMA_3;
- }
- if(bits & 0x04)
- return XFER_UDMA_2;
- if(bits & 0x02)
- return XFER_UDMA_1;
- if(bits & 0x01)
- return XFER_UDMA_0;
- return 0;
-}
-
-/* Calculate MultiWord DMA timings */
-static int __pmac
-pmac_ide_mdma_enable(ide_drive_t *drive, int idx)
-{
- byte bits = drive->id->dma_mword & 0x07;
- byte feature = dma_bits_to_command(bits);
- u32 *timings;
- int drive_cycle_time;
- struct hd_driveid *id = drive->id;
- int ret;
-
- /* Set feature on drive */
- printk(KERN_INFO "%s: Enabling MultiWord DMA %d\n", drive->name, feature & 0xf);
- ret = pmac_ide_do_setfeature(drive, feature);
- if (ret) {
- printk(KERN_WARNING "%s: Failed !\n", drive->name);
- return 0;
- }
-
- if (!drive->init_speed)
- drive->init_speed = feature;
-
- /* which drive is it ? */
- if (drive->select.b.unit & 0x01)
- timings = &pmac_ide[idx].timings[1];
- else
- timings = &pmac_ide[idx].timings[0];
-
- /* Check if drive provide explicit cycle time */
- if ((id->field_valid & 2) && (id->eide_dma_time))
- drive_cycle_time = id->eide_dma_time;
- else
- drive_cycle_time = 0;
-
- /* Calculate controller timings */
- set_timings_mdma(pmac_ide[idx].kind, timings, feature, drive_cycle_time);
-
- drive->current_speed = feature;
- return 1;
-}
-
-/* Calculate Ultra DMA timings */
-static int __pmac
-pmac_ide_udma_enable(ide_drive_t *drive, int idx, int high_speed)
-{
- byte bits = drive->id->dma_ultra & 0x1f;
- byte feature = udma_bits_to_command(bits, high_speed);
- u32 *timings;
- int ret;
-
- /* Set feature on drive */
- printk(KERN_INFO "%s: Enabling Ultra DMA %d\n", drive->name, feature & 0xf);
- ret = pmac_ide_do_setfeature(drive, feature);
- if (ret) {
- printk(KERN_WARNING "%s: Failed !\n", drive->name);
- return 0;
- }
-
- if (!drive->init_speed)
- drive->init_speed = feature;
-
- /* which drive is it ? */
- if (drive->select.b.unit & 0x01)
- timings = &pmac_ide[idx].timings[1];
- else
- timings = &pmac_ide[idx].timings[0];
-
- set_timings_udma(timings, feature);
-
- drive->current_speed = feature;
- return 1;
-}
-
-static int __pmac
-pmac_ide_check_dma(ide_drive_t *drive)
-{
- int ata4, udma, idx;
- struct hd_driveid *id = drive->id;
- int enable = 1;
-
- drive->using_dma = 0;
-
- idx = pmac_ide_find(drive);
- if (idx < 0)
- return 0;
-
- if (drive->media == ide_floppy)
- enable = 0;
- if (((id->capability & 1) == 0) && !check_drive_lists(drive, GOOD_DMA_DRIVE))
- enable = 0;
- if (check_drive_lists(drive, BAD_DMA_DRIVE))
- enable = 0;
-
- udma = 0;
- ata4 = (pmac_ide[idx].kind == controller_kl_ata4 ||
- pmac_ide[idx].kind == controller_kl_ata4_80);
-
- if(enable) {
- if (ata4 && (drive->media == ide_disk) &&
- (id->field_valid & 0x0004) && (id->dma_ultra & 0x1f)) {
- /* UltraDMA modes. */
- drive->using_dma = pmac_ide_udma_enable(drive, idx,
- pmac_ide[idx].kind == controller_kl_ata4_80);
- }
- if (!drive->using_dma && (id->dma_mword & 0x0007)) {
- /* Normal MultiWord DMA modes. */
- drive->using_dma = pmac_ide_mdma_enable(drive, idx);
- }
- OUT_BYTE(0, IDE_CONTROL_REG);
- /* Apply settings to controller */
- pmac_ide_selectproc(drive);
- }
- return 0;
-}
-
-static inline void pmac_ide_toggle_bounce(ide_drive_t *drive, int on)
-{
- dma64_addr_t addr = BLK_BOUNCE_HIGH;
-
- if (HWIF(drive)->no_highio || HWIF(drive)->pci_dev == NULL)
- return;
-
- if (on && drive->media == ide_disk) {
- if (!PCI_DMA_BUS_IS_PHYS)
- addr = BLK_BOUNCE_ANY;
- else
- addr = HWIF(drive)->pci_dev->dma_mask;
- }
-
- blk_queue_bounce_limit(&drive->queue, addr);
-}
-
-static int __pmac
-pmac_ide_dmaproc(ide_dma_action_t func, ide_drive_t *drive)
-{
- int ix, dstat;
- volatile struct dbdma_regs *dma;
- byte unit = (drive->select.b.unit & 0x01);
- byte ata4;
- int reading = 0;
-
- /* Can we stuff a pointer to our intf structure in config_data
- * or select_data in hwif ?
- */
- ix = pmac_ide_find(drive);
- if (ix < 0)
- return 0;
- dma = pmac_ide[ix].dma_regs;
- ata4 = (pmac_ide[ix].kind == controller_kl_ata4 ||
- pmac_ide[ix].kind == controller_kl_ata4_80);
-
- switch (func) {
- case ide_dma_off:
- printk(KERN_INFO "%s: DMA disabled\n", drive->name);
- case ide_dma_off_quietly:
- drive->using_dma = 0;
- pmac_ide_toggle_bounce(drive, 0);
- break;
- case ide_dma_on:
- case ide_dma_check:
- pmac_ide_check_dma(drive);
- if (drive->using_dma)
- pmac_ide_toggle_bounce(drive, 1);
- break;
- case ide_dma_read:
- reading = 1;
- case ide_dma_write:
- SELECT_READ_WRITE(HWIF(drive),drive,func);
- if (!pmac_ide_build_dmatable(drive, ix, !reading))
- return 1;
- /* Apple adds 60ns to wrDataSetup on reads */
- if (ata4 && (pmac_ide[ix].timings[unit] & TR_66_UDMA_EN)) {
- out_le32((unsigned *)(IDE_DATA_REG + IDE_TIMING_CONFIG + _IO_BASE),
- pmac_ide[ix].timings[unit] +
- (reading ? 0x00800000UL : 0));
- (void)in_le32((unsigned *)(IDE_DATA_REG + IDE_TIMING_CONFIG + _IO_BASE));
- }
- drive->waiting_for_dma = 1;
- if (drive->media != ide_disk)
- return 0;
- ide_set_handler(drive, &ide_dma_intr, WAIT_CMD, NULL);
- if ((HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASKFILE) &&
- (drive->addressing == 1)) {
- ide_task_t *args = HWGROUP(drive)->rq->special;
- OUT_BYTE(args->tfRegister[IDE_COMMAND_OFFSET], IDE_COMMAND_REG);
- } else if (drive->addressing) {
- OUT_BYTE(reading ? WIN_READDMA_EXT : WIN_WRITEDMA_EXT, IDE_COMMAND_REG);
- } else {
- OUT_BYTE(reading ? WIN_READDMA : WIN_WRITEDMA, IDE_COMMAND_REG);
- }
- case ide_dma_begin:
- out_le32(&dma->control, (RUN << 16) | RUN);
- /* Make sure it gets to the controller right now */
- (void)in_le32(&dma->control);
- break;
- case ide_dma_end: /* returns 1 on error, 0 otherwise */
- drive->waiting_for_dma = 0;
- dstat = in_le32(&dma->status);
- out_le32(&dma->control, ((RUN|WAKE|DEAD) << 16));
- pmac_ide_destroy_dmatable(drive, ix);
- /* verify good dma status */
- return (dstat & (RUN|DEAD|ACTIVE)) != RUN;
- case ide_dma_test_irq: /* returns 1 if dma irq issued, 0 otherwise */
- /* We have to things to deal with here:
- *
- * - The dbdma won't stop if the command was started
- * but completed with an error without transfering all
- * datas. This happens when bad blocks are met during
- * a multi-block transfer.
- *
- * - The dbdma fifo hasn't yet finished flushing to
- * to system memory when the disk interrupt occurs.
- *
- * The trick here is to increment drive->waiting_for_dma,
- * and return as if no interrupt occured. If the counter
- * reach a certain timeout value, we then return 1. If
- * we really got the interrupt, it will happen right away
- * again.
- * Apple's solution here may be more elegant. They issue
- * a DMA channel interrupt (a separate irq line) via a DBDMA
- * NOP command just before the STOP, and wait for both the
- * disk and DBDMA interrupts to have completed.
- */
-
- /* If ACTIVE is cleared, the STOP command have passed and
- * transfer is complete.
- */
- if (!(in_le32(&dma->status) & ACTIVE))
- return 1;
- if (!drive->waiting_for_dma)
- printk(KERN_WARNING "ide%d, ide_dma_test_irq \
- called while not waiting\n", ix);
-
- /* If dbdma didn't execute the STOP command yet, the
- * active bit is still set */
- drive->waiting_for_dma++;
- if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
- printk(KERN_WARNING "ide%d, timeout waiting \
- for dbdma command stop\n", ix);
- return 1;
- }
- udelay(1);
- return 0;
-
- /* Let's implement tose just in case someone wants them */
- case ide_dma_bad_drive:
- case ide_dma_good_drive:
- return check_drive_lists(drive, (func == ide_dma_good_drive));
- case ide_dma_verbose:
- return report_drive_dmaing(drive);
- case ide_dma_retune:
- case ide_dma_lostirq:
- case ide_dma_timeout:
- printk(KERN_WARNING "ide_pmac_dmaproc: chipset supported %s func only: %d\n", ide_dmafunc_verbose(func), func);
- return 1;
- default:
- printk(KERN_WARNING "ide_pmac_dmaproc: unsupported %s func: %d\n", ide_dmafunc_verbose(func), func);
- return 1;
- }
- return 0;
-}
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
-
-static void __pmac
-idepmac_sleep_device(ide_drive_t *drive, int i, unsigned base)
-{
- int j;
-
- /* FIXME: We only handle the master IDE disk, we shoud
- * try to fix CD-ROMs here
- */
- switch (drive->media) {
- case ide_disk:
- /* Spin down the drive */
- outb(drive->select.all, base+0x60);
- (void)inb(base+0x60);
- udelay(100);
- outb(0x0, base+0x30);
- outb(0x0, base+0x20);
- outb(0x0, base+0x40);
- outb(0x0, base+0x50);
- outb(0xe0, base+0x70);
- outb(0x2, base+0x160);
- for (j = 0; j < 10; j++) {
- int status;
- mdelay(100);
- status = inb(base+0x70);
- if (!(status & BUSY_STAT) && (status & DRQ_STAT))
- break;
- }
- break;
- case ide_cdrom:
- // todo
- break;
- case ide_floppy:
- // todo
- break;
- }
-}
-
-#ifdef CONFIG_PMAC_PBOOK
-static void __pmac
-idepmac_wake_device(ide_drive_t *drive, int used_dma)
-{
- /* We force the IDE subdriver to check for a media change
- * This must be done first or we may lost the condition
- *
- * Problem: This can schedule. I moved the block device
- * wakeup almost late by priority because of that.
- */
- if (DRIVER(drive) && DRIVER(drive)->media_change)
- DRIVER(drive)->media_change(drive);
-
- /* We kick the VFS too (see fix in ide.c revalidate) */
- check_disk_change(MKDEV(HWIF(drive)->major, (drive->select.b.unit) << PARTN_BITS));
-
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
- /* We re-enable DMA on the drive if it was active. */
- /* This doesn't work with the CD-ROM in the media-bay, probably
- * because of a pending unit attention. The problem if that if I
- * clear the error, the filesystem dies.
- */
- if (used_dma && !ide_spin_wait_hwgroup(drive)) {
- /* Lock HW group */
- HWGROUP(drive)->busy = 1;
- pmac_ide_check_dma(drive);
- HWGROUP(drive)->busy = 0;
- if (!list_empty(&drive->queue.queue_head))
- ide_do_request(HWGROUP(drive), 0);
- spin_unlock_irq(&io_request_lock);
- }
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
-}
-
-static void __pmac
-idepmac_sleep_interface(int i, unsigned base, int mediabay)
-{
- struct device_node* np = pmac_ide[i].node;
-
- /* We clear the timings */
- pmac_ide[i].timings[0] = 0;
- pmac_ide[i].timings[1] = 0;
-
- /* The media bay will handle itself just fine */
- if (mediabay)
- return;
-
- /* Disable the bus */
- ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmac_ide[i].aapl_bus_id, 0);
-}
-
-static void __pmac
-idepmac_wake_interface(int i, unsigned long base, int mediabay)
-{
- struct device_node* np = pmac_ide[i].node;
-
- if (!mediabay) {
- /* Revive IDE disk and controller */
- ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmac_ide[i].aapl_bus_id, 1);
- ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmac_ide[i].aapl_bus_id, 1);
- mdelay(10);
- ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmac_ide[i].aapl_bus_id, 0);
- }
-}
-
-static void
-idepmac_sleep_drive(ide_drive_t *drive, int idx, unsigned long base)
-{
- int unlock = 0;
-
- /* Wait for HW group to complete operations */
- if (ide_spin_wait_hwgroup(drive)) {
- // What can we do here ? Wake drive we had already
- // put to sleep and return an error ?
- } else {
- unlock = 1;
- /* Lock HW group */
- HWGROUP(drive)->busy = 1;
- /* Stop the device */
- idepmac_sleep_device(drive, idx, base);
- }
- if (unlock)
- spin_unlock_irq(&io_request_lock);
-}
-
-static void
-idepmac_wake_drive(ide_drive_t *drive, unsigned long base)
-{
- unsigned long flags;
- int j;
-
- /* Reset timings */
- pmac_ide_selectproc(drive);
- mdelay(10);
-
- /* Wait up to 20 seconds for the drive to be ready */
- for (j = 0; j < 200; j++) {
- int status;
- mdelay(100);
- outb(drive->select.all, base + 0x60);
- if (inb(base + 0x60) != drive->select.all)
- continue;
- status = inb(base + 0x70);
- if (!(status & BUSY_STAT))
- break;
- }
-
- /* We resume processing on the HW group */
- spin_lock_irqsave(&io_request_lock, flags);
- HWGROUP(drive)->busy = 0;
- if (!list_empty(&drive->queue.queue_head))
- ide_do_request(HWGROUP(drive), 0);
- spin_unlock_irqrestore(&io_request_lock, flags);
-}
-
-/* Note: We support only master drives for now. This will have to be
- * improved if we want to handle sleep on the iMacDV where the CD-ROM
- * is a slave.
- *
- * Well, actually, that sorta works on the iBook2 when the CD-ROM is
- * a slave, though it will fail to spin_wait_hwgroup for the slave
- * device as it is marked busy by the master sleep code. Well, it's
- * probably not worth fixing now as we don't have sleep code for
- * ATAPI devices anyway. Future kernels will hopefully deal with
- * IDE PM in a more generic way.
- */
-static int __pmac
-idepmac_notify_sleep(struct pmu_sleep_notifier *self, int when)
-{
- int i, ret;
- unsigned long base;
- int big_delay;
-
- switch (when) {
- case PBOOK_SLEEP_REQUEST:
- break;
- case PBOOK_SLEEP_REJECT:
- break;
- case PBOOK_SLEEP_NOW:
- for (i = 0; i < pmac_ide_count; ++i) {
- ide_hwif_t *hwif;
- int dn;
-
- if ((base = pmac_ide[i].regbase) == 0)
- continue;
-
- hwif = &ide_hwifs[i];
- for (dn=0; dn<MAX_DRIVES; dn++) {
- if (!hwif->drives[dn].present)
- continue;
- idepmac_sleep_drive(&hwif->drives[dn], i, base);
- }
- /* Disable irq during sleep */
- disable_irq(pmac_ide[i].irq);
-
- /* Check if this is a media bay with an IDE device or not
- * a media bay.
- */
- ret = check_media_bay_by_base(base, MB_CD);
- if ((ret == 0) || (ret == -ENODEV))
- idepmac_sleep_interface(i, base, (ret == 0));
- }
- break;
- case PBOOK_WAKE:
- big_delay = 0;
- for (i = 0; i < pmac_ide_count; ++i) {
-
- if ((base = pmac_ide[i].regbase) == 0)
- continue;
-
- /* Make sure we have sane timings */
- sanitize_timings(i);
-
- /* Check if this is a media bay with an IDE device or not
- * a media bay
- */
- ret = check_media_bay_by_base(base, MB_CD);
- if ((ret == 0) || (ret == -ENODEV)) {
- idepmac_wake_interface(i, base, (ret == 0));
- big_delay = 1;
- }
-
- }
- /* Let hardware get up to speed */
- if (big_delay)
- mdelay(IDE_WAKEUP_DELAY_MS);
-
- for (i = 0; i < pmac_ide_count; ++i) {
- ide_hwif_t *hwif;
- int used_dma, dn;
- int irq_on = 0;
-
- if ((base = pmac_ide[i].regbase) == 0)
- continue;
-
- hwif = &ide_hwifs[i];
- for (dn=0; dn<MAX_DRIVES; dn++) {
- ide_drive_t *drive = &hwif->drives[dn];
- if (!drive->present)
- continue;
- /* We don't have re-configured DMA yet */
- used_dma = drive->using_dma;
- drive->using_dma = 0;
- idepmac_wake_drive(drive, base);
- if (!irq_on) {
- enable_irq(pmac_ide[i].irq);
- irq_on = 1;
- }
- idepmac_wake_device(drive, used_dma);
- }
- if (!irq_on)
- enable_irq(pmac_ide[i].irq);
- }
- break;
- }
- return PBOOK_SLEEP_OK;
-}
-#endif /* CONFIG_PMAC_PBOOK */
-
-static int __pmac
-pmac_ide_notify_reboot(struct notifier_block *this, unsigned long code, void *x)
-{
- int i, gotone;
- unsigned long base;
-
- if (code != SYS_HALT && code != SYS_POWER_OFF)
- return 0;
-
- gotone = 0;
- for (i = 0; i < pmac_ide_count; ++i) {
- ide_hwif_t *hwif;
- ide_drive_t *drive;
- int unlock = 0;
- int dn;
-
- if ((base = pmac_ide[i].regbase) == 0)
- continue;
-
- hwif = &ide_hwifs[i];
- for (dn=0; dn<MAX_DRIVES; dn++) {
- drive = &hwif->drives[dn];
- if (drive->present) {
- gotone = 1;
- /* Wait for HW group to complete operations */
- if (ide_spin_wait_hwgroup(drive)) {
- // What can we do here ? Wake drive we had already
- // put to sleep and return an error ?
- } else {
- unlock = 1;
- /* Lock HW group */
- HWGROUP(drive)->busy = 1;
-
- /* Stop the device */
- idepmac_sleep_device(drive, i, base);
- }
- }
- if (unlock)
- spin_unlock_irq(&io_request_lock);
- }
- }
- if (gotone)
- mdelay(1000);
-
- return NOTIFY_DONE;
-}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)