diff options
Diffstat (limited to 'drivers/ide/ppc/pmac.c')
| -rw-r--r-- | drivers/ide/ppc/pmac.c | 2208 |
1 files changed, 2208 insertions, 0 deletions
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c new file mode 100644 index 000000000000..6dc273a81327 --- /dev/null +++ b/drivers/ide/ppc/pmac.c @@ -0,0 +1,2208 @@ +/* + * 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) 1998-2003 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 + * + * TODO: - Use pre-calculated (kauai) timing tables all the time and + * get rid of the "rounded" tables used previously, so we have the + * same table format for all controllers and can then just have one + * big table + * + */ +#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 <linux/adb.h> +#include <linux/pmu.h> +#include <linux/scatterlist.h> + +#include <asm/prom.h> +#include <asm/io.h> +#include <asm/dbdma.h> +#include <asm/ide.h> +#include <asm/pci-bridge.h> +#include <asm/machdep.h> +#include <asm/pmac_feature.h> +#include <asm/sections.h> +#include <asm/irq.h> + +#ifndef CONFIG_PPC64 +#include <asm/mediabay.h> +#endif + +#include "ide-timing.h" + +#undef IDE_PMAC_DEBUG + +#define DMA_WAIT_TIMEOUT 50 + +typedef struct pmac_ide_hwif { + unsigned long regbase; + int irq; + int kind; + int aapl_bus_id; + unsigned cable_80 : 1; + unsigned mediabay : 1; + unsigned broken_dma : 1; + unsigned broken_dma_warn : 1; + struct device_node* node; + struct macio_dev *mdev; + u32 timings[4]; + volatile u32 __iomem * *kauai_fcr; +#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 __iomem * dma_regs; + struct dbdma_cmd* dma_table_cpu; +#endif + +} pmac_ide_hwif_t; + +static pmac_ide_hwif_t 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_un_ata6, /* UniNorth2 ATA-6 */ + controller_k2_ata6, /* K2 ATA-6 */ + controller_sh_ata6, /* Shasta ATA-6 */ +}; + +static const char* model_name[] = { + "OHare ATA", /* OHare based */ + "Heathrow ATA", /* Heathrow/Paddington */ + "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */ + "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */ + "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */ + "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */ + "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */ +}; + +/* + * Extra registers, both 32-bit little-endian + */ +#define IDE_TIMING_CONFIG 0x200 +#define IDE_INTERRUPT 0x300 + +/* Kauai (U2) ATA has different register setup */ +#define IDE_KAUAI_PIO_CONFIG 0x200 +#define IDE_KAUAI_ULTRA_CONFIG 0x210 +#define IDE_KAUAI_POLL_CONFIG 0x220 + +/* + * 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 */ + +/* 133Mhz cell, found in shasta. + * See comments about 100 Mhz Uninorth 2... + * Note that PIO_MASK and MDMA_MASK seem to overlap + */ +#define TR_133_PIOREG_PIO_MASK 0xff000fff +#define TR_133_PIOREG_MDMA_MASK 0x00fff800 +#define TR_133_UDMAREG_UDMA_MASK 0x0003ffff +#define TR_133_UDMAREG_UDMA_EN 0x00000001 + +/* 100Mhz cell, found in Uninorth 2. I don't have much infos about + * this one yet, it appears as a pci device (106b/0033) on uninorth + * internal PCI bus and it's clock is controlled like gem or fw. It + * appears to be an evolution of keylargo ATA4 with a timing register + * extended to 2 32bits registers and a similar DBDMA channel. Other + * registers seem to exist but I can't tell much about them. + * + * So far, I'm using pre-calculated tables for this extracted from + * the values used by the MacOS X driver. + * + * The "PIO" register controls PIO and MDMA timings, the "ULTRA" + * register controls the UDMA timings. At least, it seems bit 0 + * of this one enables UDMA vs. MDMA, and bits 4..7 are the + * cycle time in units of 10ns. Bits 8..15 are used by I don't + * know their meaning yet + */ +#define TR_100_PIOREG_PIO_MASK 0xff000fff +#define TR_100_PIOREG_MDMA_MASK 0x00fff000 +#define TR_100_UDMAREG_UDMA_MASK 0x0000ffff +#define TR_100_UDMAREG_UDMA_EN 0x00000001 + + +/* 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 + +/* + * FCR Register on Kauai. Not sure what bit 0x4 is ... + */ +#define KAUAI_FCR_UATA_MAGIC 0x00000004 +#define KAUAI_FCR_UATA_RESET_N 0x00000002 +#define KAUAI_FCR_UATA_ENABLE 0x00000001 + +#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 } +}; + +/* KeyLargo ATA-4 Ultra DMA timings (rounded) */ +struct { + int addrSetup; /* ??? */ + int rdy2pause; + int wrDataSetup; +} kl66_udma_timings[] __pmacdata = +{ + { 0, 180, 120 }, /* Mode 0 */ + { 0, 150, 90 }, /* 1 */ + { 0, 120, 60 }, /* 2 */ + { 0, 90, 45 }, /* 3 */ + { 0, 90, 30 } /* 4 */ +}; + +/* UniNorth 2 ATA/100 timings */ +struct kauai_timing { + int cycle_time; + u32 timing_reg; +}; + +static struct kauai_timing kauai_pio_timings[] __pmacdata = +{ + { 930 , 0x08000fff }, + { 600 , 0x08000a92 }, + { 383 , 0x0800060f }, + { 360 , 0x08000492 }, + { 330 , 0x0800048f }, + { 300 , 0x080003cf }, + { 270 , 0x080003cc }, + { 240 , 0x0800038b }, + { 239 , 0x0800030c }, + { 180 , 0x05000249 }, + { 120 , 0x04000148 } +}; + +static struct kauai_timing kauai_mdma_timings[] __pmacdata = +{ + { 1260 , 0x00fff000 }, + { 480 , 0x00618000 }, + { 360 , 0x00492000 }, + { 270 , 0x0038e000 }, + { 240 , 0x0030c000 }, + { 210 , 0x002cb000 }, + { 180 , 0x00249000 }, + { 150 , 0x00209000 }, + { 120 , 0x00148000 }, + { 0 , 0 }, +}; + +static struct kauai_timing kauai_udma_timings[] __pmacdata = +{ + { 120 , 0x000070c0 }, + { 90 , 0x00005d80 }, + { 60 , 0x00004a60 }, + { 45 , 0x00003a50 }, + { 30 , 0x00002a30 }, + { 20 , 0x00002921 }, + { 0 , 0 }, +}; + +static struct kauai_timing shasta_pio_timings[] __pmacdata = +{ + { 930 , 0x08000fff }, + { 600 , 0x0A000c97 }, + { 383 , 0x07000712 }, + { 360 , 0x040003cd }, + { 330 , 0x040003cd }, + { 300 , 0x040003cd }, + { 270 , 0x040003cd }, + { 240 , 0x040003cd }, + { 239 , 0x040003cd }, + { 180 , 0x0400028b }, + { 120 , 0x0400010a } +}; + +static struct kauai_timing shasta_mdma_timings[] __pmacdata = +{ + { 1260 , 0x00fff000 }, + { 480 , 0x00820800 }, + { 360 , 0x00820800 }, + { 270 , 0x00820800 }, + { 240 , 0x00820800 }, + { 210 , 0x00820800 }, + { 180 , 0x00820800 }, + { 150 , 0x0028b000 }, + { 120 , 0x001ca000 }, + { 0 , 0 }, +}; + +static struct kauai_timing shasta_udma133_timings[] __pmacdata = +{ + { 120 , 0x00035901, }, + { 90 , 0x000348b1, }, + { 60 , 0x00033881, }, + { 45 , 0x00033861, }, + { 30 , 0x00033841, }, + { 20 , 0x00033031, }, + { 15 , 0x00033021, }, + { 0 , 0 }, +}; + + +static inline u32 +kauai_lookup_timing(struct kauai_timing* table, int cycle_time) +{ + int i; + + for (i=0; table[i].cycle_time; i++) + if (cycle_time > table[i+1].cycle_time) + return table[i].timing_reg; + return 0; +} + +/* allow up to 256 DBDMA commands per xfer */ +#define MAX_DCMDS 256 + +/* + * Wait 1s for disk to answer on IDE bus after a hard reset + * of the device (via GPIO/FCR). + * + * Some devices seem to "pollute" the bus even after dropping + * the BSY bit (typically some combo drives slave on the UDMA + * bus) after a hard reset. Since we hard reset all drives on + * KeyLargo ATA66, we have to keep that delay around. I may end + * up not hard resetting anymore on these and keep the delay only + * for older interfaces instead (we have to reset when coming + * from MacOS...) --BenH. + */ +#define IDE_WAKEUP_DELAY (1*HZ) + +static void pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif); +static int pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq); +static int pmac_ide_tune_chipset(ide_drive_t *drive, u8 speed); +static void pmac_ide_tuneproc(ide_drive_t *drive, u8 pio); +static void pmac_ide_selectproc(ide_drive_t *drive); +static void pmac_ide_kauai_selectproc(ide_drive_t *drive); + +#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */ + +/* + * Below is the code for blinking the laptop LED along with hard + * disk activity. + */ + +#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK + +/* Set to 50ms minimum led-on time (also used to limit frequency + * of requests sent to the PMU + */ +#define PMU_HD_BLINK_TIME (HZ/50) + +static struct adb_request pmu_blink_on, pmu_blink_off; +static spinlock_t pmu_blink_lock; +static unsigned long pmu_blink_stoptime; +static int pmu_blink_ledstate; +static struct timer_list pmu_blink_timer; +static int pmu_ide_blink_enabled; + + +static void +pmu_hd_blink_timeout(unsigned long data) +{ + unsigned long flags; + + spin_lock_irqsave(&pmu_blink_lock, flags); + + /* We may have been triggered again in a racy way, check + * that we really want to switch it off + */ + if (time_after(pmu_blink_stoptime, jiffies)) + goto done; + + /* Previous req. not complete, try 100ms more */ + if (pmu_blink_off.complete == 0) + mod_timer(&pmu_blink_timer, jiffies + PMU_HD_BLINK_TIME); + else if (pmu_blink_ledstate) { + pmu_request(&pmu_blink_off, NULL, 4, 0xee, 4, 0, 0); + pmu_blink_ledstate = 0; + } +done: + spin_unlock_irqrestore(&pmu_blink_lock, flags); +} + +static void +pmu_hd_kick_blink(void *data, int rw) +{ + unsigned long flags; + + pmu_blink_stoptime = jiffies + PMU_HD_BLINK_TIME; + wmb(); + mod_timer(&pmu_blink_timer, pmu_blink_stoptime); + /* Fast path when LED is already ON */ + if (pmu_blink_ledstate == 1) + return; + spin_lock_irqsave(&pmu_blink_lock, flags); + if (pmu_blink_on.complete && !pmu_blink_ledstate) { + pmu_request(&pmu_blink_on, NULL, 4, 0xee, 4, 0, 1); + pmu_blink_ledstate = 1; + } + spin_unlock_irqrestore(&pmu_blink_lock, flags); +} + +static int +pmu_hd_blink_init(void) +{ + struct device_node *dt; + const char *model; + + /* Currently, I only enable this feature on KeyLargo based laptops, + * older laptops may support it (at least heathrow/paddington) but + * I don't feel like loading those venerable old machines with so + * much additional interrupt & PMU activity... + */ + if (pmu_get_model() != PMU_KEYLARGO_BASED) + return 0; + + dt = find_devices("device-tree"); + if (dt == NULL) + return 0; + model = (const char *)get_property(dt, "model", NULL); + if (model == NULL) + return 0; + if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 && + strncmp(model, "iBook", strlen("iBook")) != 0) + return 0; + + pmu_blink_on.complete = 1; + pmu_blink_off.complete = 1; + spin_lock_init(&pmu_blink_lock); + init_timer(&pmu_blink_timer); + pmu_blink_timer.function = pmu_hd_blink_timeout; + + return 1; +} + +#endif /* CONFIG_BLK_DEV_IDE_PMAC_BLINK */ + +/* + * 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, + unsigned long data_port, unsigned long 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; +} + +#define PMAC_IDE_REG(x) ((void __iomem *)(IDE_DATA_REG+(x))) + +/* + * Apply the timings of the proper unit (master/slave) to the shared + * timing register when selecting that unit. This version is for + * ASICs with a single timing register + */ +static void __pmac +pmac_ide_selectproc(ide_drive_t *drive) +{ + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + + if (pmif == NULL) + return; + + if (drive->select.b.unit & 0x01) + writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG)); + else + writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG)); + (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG)); +} + +/* + * Apply the timings of the proper unit (master/slave) to the shared + * timing register when selecting that unit. This version is for + * ASICs with a dual timing register (Kauai) + */ +static void __pmac +pmac_ide_kauai_selectproc(ide_drive_t *drive) +{ + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + + if (pmif == NULL) + return; + + if (drive->select.b.unit & 0x01) { + writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG)); + writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG)); + } else { + writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG)); + writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG)); + } + (void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG)); +} + +/* + * Force an update of controller timing values for a given drive + */ +static void __pmac +pmac_ide_do_update_timings(ide_drive_t *drive) +{ + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + + if (pmif == NULL) + return; + + if (pmif->kind == controller_sh_ata6 || + pmif->kind == controller_un_ata6 || + pmif->kind == controller_k2_ata6) + pmac_ide_kauai_selectproc(drive); + else + pmac_ide_selectproc(drive); +} + +static void +pmac_outbsync(ide_drive_t *drive, u8 value, unsigned long port) +{ + u32 tmp; + + writeb(value, (void __iomem *) port); + tmp = readl(PMAC_IDE_REG(IDE_TIMING_CONFIG)); +} + +/* + * Send the SET_FEATURE IDE command to the drive and update drive->id with + * the new state. We currently don't use the generic routine as it used to + * cause various trouble, especially with older mediabays. + * This code is sometimes triggering a spurrious interrupt though, I need + * to sort that out sooner or later and see if I can finally get the + * common version to work properly in all cases + */ +static int __pmac +pmac_ide_do_setfeature(ide_drive_t *drive, u8 command) +{ + ide_hwif_t *hwif = HWIF(drive); + int result = 1; + + disable_irq_nosync(hwif->irq); + udelay(1); + SELECT_DRIVE(drive); + SELECT_MASK(drive, 0); + udelay(1); + /* Get rid of pending error state */ + (void) hwif->INB(IDE_STATUS_REG); + /* Timeout bumped for some powerbooks */ + if (wait_for_ready(drive, 2000)) { + /* Timeout bumped for some powerbooks */ + printk(KERN_ERR "%s: pmac_ide_do_setfeature disk not ready " + "before SET_FEATURE!\n", drive->name); + goto out; + } + udelay(10); + hwif->OUTB(drive->ctl | 2, IDE_CONTROL_REG); + hwif->OUTB(command, IDE_NSECTOR_REG); + hwif->OUTB(SETFEATURES_XFER, IDE_FEATURE_REG); + hwif->OUTBSYNC(drive, WIN_SETFEATURES, IDE_COMMAND_REG); + udelay(1); + /* Timeout bumped for some powerbooks */ + result = wait_for_ready(drive, 2000); + hwif->OUTB(drive->ctl, IDE_CONTROL_REG); + if (result) + printk(KERN_ERR "%s: pmac_ide_do_setfeature disk not ready " + "after SET_FEATURE !\n", drive->name); +out: + SELECT_MASK(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; +} + +/* + * Old tuning functions (called on hdparm -p), sets up drive PIO timings + */ +static void __pmac +pmac_ide_tuneproc(ide_drive_t *drive, u8 pio) +{ + ide_pio_data_t d; + u32 *timings; + unsigned accessTicks, recTicks; + unsigned accessTime, recTime; + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + + if (pmif == NULL) + return; + + /* which drive is it ? */ + timings = &pmif->timings[drive->select.b.unit & 0x01]; + + pio = ide_get_best_pio_mode(drive, pio, 4, &d); + + switch (pmif->kind) { + case controller_sh_ata6: { + /* 133Mhz cell */ + u32 tr = kauai_lookup_timing(shasta_pio_timings, d.cycle_time); + if (tr == 0) + return; + *timings = ((*timings) & ~TR_133_PIOREG_PIO_MASK) | tr; + break; + } + case controller_un_ata6: + case controller_k2_ata6: { + /* 100Mhz cell */ + u32 tr = kauai_lookup_timing(kauai_pio_timings, d.cycle_time); + if (tr == 0) + return; + *timings = ((*timings) & ~TR_100_PIOREG_PIO_MASK) | tr; + break; + } + case controller_kl_ata4: + /* 66Mhz cell */ + 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); + 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); + break; + default: { + /* 33Mhz cell */ + int ebit = 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); + 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; + break; + } + } + +#ifdef IDE_PMAC_DEBUG + printk(KERN_ERR "%s: Set PIO timing for mode %d, reg: 0x%08x\n", + drive->name, pio, *timings); +#endif + + if (drive->select.all == HWIF(drive)->INB(IDE_SELECT_REG)) + pmac_ide_do_update_timings(drive); +} + +#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC + +/* + * Calculate KeyLargo ATA/66 UDMA timings + */ +static int __pmac +set_timings_udma_ata4(u32 *timings, u8 speed) +{ + unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks; + + if (speed > XFER_UDMA_4) + return 1; + + rdyToPauseTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].rdy2pause); + wrDataSetupTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].wrDataSetup); + addrTicks = SYSCLK_TICKS_66(kl66_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; +} + +/* + * Calculate Kauai ATA/100 UDMA timings + */ +static int __pmac +set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed) +{ + struct ide_timing *t = ide_timing_find_mode(speed); + u32 tr; + + if (speed > XFER_UDMA_5 || t == NULL) + return 1; + tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma); + if (tr == 0) + return 1; + *ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr; + *ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN; + + return 0; +} + +/* + * Calculate Shasta ATA/133 UDMA timings + */ +static int __pmac +set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed) +{ + struct ide_timing *t = ide_timing_find_mode(speed); + u32 tr; + + if (speed > XFER_UDMA_6 || t == NULL) + return 1; + tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma); + if (tr == 0) + return 1; + *ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr; + *ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN; + + return 0; +} + +/* + * Calculate MDMA timings for all cells + */ +static int __pmac +set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2, + u8 speed, int drive_cycle_time) +{ + int cycleTime, accessTime = 0, recTime = 0; + unsigned accessTicks, recTicks; + struct mdma_timings_t* tm = NULL; + 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_sh_ata6: + case controller_un_ata6: + case controller_k2_ata6: + break; + case controller_kl_ata4: + tm = mdma_timings_66; + break; + case controller_kl_ata3: + tm = mdma_timings_33k; + break; + default: + tm = mdma_timings_33; + break; + } + if (tm != NULL) { + /* 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 "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n", + drive->name, cycleTime, accessTime, recTime); +#endif + } + switch(intf_type) { + case controller_sh_ata6: { + /* 133Mhz cell */ + u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime); + if (tr == 0) + return 1; + *timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr; + *timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN; + } + case controller_un_ata6: + case controller_k2_ata6: { + /* 100Mhz cell */ + u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime); + if (tr == 0) + return 1; + *timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr; + *timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN; + } + break; + case controller_kl_ata4: + /* 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); + break; + case 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); + break; + default: { + /* 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 "%s: Set MDMA timing for mode %d, reg: 0x%08x\n", + drive->name, speed & 0xf, *timings); +#endif + return 0; +} +#endif /* #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC */ + +/* + * Speedproc. This function is called by the core to set any of the standard + * timing (PIO, MDMA or UDMA) to both the drive and the controller. + * You may notice we don't use this function on normal "dma check" operation, + * our dedicated function is more precise as it uses the drive provided + * cycle time value. We should probably fix this one to deal with that too... + */ +static int __pmac +pmac_ide_tune_chipset (ide_drive_t *drive, byte speed) +{ + int unit = (drive->select.b.unit & 0x01); + int ret = 0; + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + u32 *timings, *timings2; + + if (pmif == NULL) + return 1; + + timings = &pmif->timings[unit]; + timings2 = &pmif->timings[unit+2]; + + switch(speed) { +#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC + case XFER_UDMA_6: + if (pmif->kind != controller_sh_ata6) + return 1; + case XFER_UDMA_5: + if (pmif->kind != controller_un_ata6 && + pmif->kind != controller_k2_ata6 && + pmif->kind != controller_sh_ata6) + return 1; + case XFER_UDMA_4: + case XFER_UDMA_3: + if (HWIF(drive)->udma_four == 0) + return 1; + case XFER_UDMA_2: + case XFER_UDMA_1: + case XFER_UDMA_0: + if (pmif->kind == controller_kl_ata4) + ret = set_timings_udma_ata4(timings, speed); + else if (pmif->kind == controller_un_ata6 + || pmif->kind == controller_k2_ata6) + ret = set_timings_udma_ata6(timings, timings2, speed); + else if (pmif->kind == controller_sh_ata6) + ret = set_timings_udma_shasta(timings, timings2, speed); + else + ret = 1; + break; + case XFER_MW_DMA_2: + case XFER_MW_DMA_1: + case XFER_MW_DMA_0: + ret = set_timings_mdma(drive, pmif->kind, timings, timings2, 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_do_update_timings(drive); + drive->current_speed = speed; + + return 0; +} + +/* + * Blast some well known "safe" values to the timing registers at init or + * wakeup from sleep time, before we do real calculation + */ +static void __pmac +sanitize_timings(pmac_ide_hwif_t *pmif) +{ + unsigned int value, value2 = 0; + + switch(pmif->kind) { + case controller_sh_ata6: + value = 0x0a820c97; + value2 = 0x00033031; + break; + case controller_un_ata6: + case controller_k2_ata6: + value = 0x08618a92; + value2 = 0x00002921; + break; + case controller_kl_ata4: + value = 0x0008438c; + break; + case controller_kl_ata3: + value = 0x00084526; + break; + case controller_heathrow: + case controller_ohare: + default: + value = 0x00074526; + break; + } + pmif->timings[0] = pmif->timings[1] = value; + pmif->timings[2] = pmif->timings[3] = value2; +} + +unsigned long __pmac +pmac_ide_get_base(int index) +{ + return pmac_ide[index].regbase; +} + +int __pmac +pmac_ide_check_base(unsigned long 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(unsigned long 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 }; + +dev_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; +} + +/* Suspend call back, should be called after the child devices + * have actually been suspended + */ +static int +pmac_ide_do_suspend(ide_hwif_t *hwif) +{ + pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data; + + /* We clear the timings */ + pmif->timings[0] = 0; + pmif->timings[1] = 0; + +#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK + /* Note: This code will be called for every hwif, thus we'll + * try several time to stop the LED blinker timer, but that + * should be harmless + */ + if (pmu_ide_blink_enabled) { + unsigned long flags; + + /* Make sure we don't hit the PMU blink */ + spin_lock_irqsave(&pmu_blink_lock, flags); + if (pmu_blink_ledstate) + del_timer(&pmu_blink_timer); + pmu_blink_ledstate = 0; + spin_unlock_irqrestore(&pmu_blink_lock, flags); + } +#endif /* CONFIG_BLK_DEV_IDE_PMAC_BLINK */ + + /* The media bay will handle itself just fine */ + if (pmif->mediabay) + return 0; + + /* Kauai has bus control FCRs directly here */ + if (pmif->kauai_fcr) { + u32 fcr = readl(pmif->kauai_fcr); + fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE); + writel(fcr, pmif->kauai_fcr); + } + + /* Disable the bus on older machines and the cell on kauai */ + ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, + 0); + + return 0; +} + +/* Resume call back, should be called before the child devices + * are resumed + */ +static int +pmac_ide_do_resume(ide_hwif_t *hwif) +{ + pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data; + + /* Hard reset & re-enable controller (do we really need to reset ? -BenH) */ + if (!pmif->mediabay) { + ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 1); + ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, 1); + msleep(10); + ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0); + msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY)); + + /* Kauai has it different */ + if (pmif->kauai_fcr) { + u32 fcr = readl(pmif->kauai_fcr); + fcr |= KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE; + writel(fcr, pmif->kauai_fcr); + } + } + + /* Sanitize drive timings */ + sanitize_timings(pmif); + + return 0; +} + +/* + * Setup, register & probe an IDE channel driven by this driver, this is + * called by one of the 2 probe functions (macio or PCI). Note that a channel + * that ends up beeing free of any device is not kept around by this driver + * (it is kept in 2.4). This introduce an interface numbering change on some + * rare machines unfortunately, but it's better this way. + */ +static int +pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif) +{ + struct device_node *np = pmif->node; + int *bidp, i; + + pmif->cable_80 = 0; + pmif->broken_dma = pmif->broken_dma_warn = 0; + if (device_is_compatible(np, "shasta-ata")) + pmif->kind = controller_sh_ata6; + else if (device_is_compatible(np, "kauai-ata")) + pmif->kind = controller_un_ata6; + else if (device_is_compatible(np, "K2-UATA")) + pmif->kind = controller_k2_ata6; + else if (device_is_compatible(np, "keylargo-ata")) { + if (strcmp(np->name, "ata-4") == 0) + pmif->kind = controller_kl_ata4; + else + pmif->kind = controller_kl_ata3; + } else if (device_is_compatible(np, "heathrow-ata")) + pmif->kind = controller_heathrow; + else { + pmif->kind = controller_ohare; + pmif->broken_dma = 1; + } + + bidp = (int *)get_property(np, "AAPL,bus-id", NULL); + pmif->aapl_bus_id = bidp ? *bidp : 0; + + /* Get cable type from device-tree */ + if (pmif->kind == controller_kl_ata4 || pmif->kind == controller_un_ata6 + || pmif->kind == controller_k2_ata6 + || pmif->kind == controller_sh_ata6) { + char* cable = get_property(np, "cable-type", NULL); + if (cable && !strncmp(cable, "80-", 3)) + pmif->cable_80 = 1; + } + /* G5's seem to have incorrect cable type in device-tree. Let's assume + * they have a 80 conductor cable, this seem to be always the case unless + * the user mucked around + */ + if (device_is_compatible(np, "K2-UATA") || + device_is_compatible(np, "shasta-ata")) + pmif->cable_80 = 1; + + /* On Kauai-type controllers, we make sure the FCR is correct */ + if (pmif->kauai_fcr) + writel(KAUAI_FCR_UATA_MAGIC | + KAUAI_FCR_UATA_RESET_N | + KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr); + + pmif->mediabay = 0; + + /* Make sure we have sane timings */ + sanitize_timings(pmif); + +#ifndef CONFIG_PPC64 + /* XXX FIXME: Media bay stuff need re-organizing */ + if (np->parent && np->parent->name + && strcasecmp(np->parent->name, "media-bay") == 0) { +#ifdef CONFIG_PMAC_PBOOK + media_bay_set_ide_infos(np->parent, pmif->regbase, pmif->irq, hwif->index); +#endif /* CONFIG_PMAC_PBOOK */ + pmif->mediabay = 1; + if (!bidp) + pmif->aapl_bus_id = 1; + } else if (pmif->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 +#endif + { + /* This is necessary to enable IDE when net-booting */ + ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1); + ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1); + msleep(10); + ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0); + msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY)); + } + + /* Setup MMIO ops */ + default_hwif_mmiops(hwif); + hwif->OUTBSYNC = pmac_outbsync; + + /* Tell common code _not_ to mess with resources */ + hwif->mmio = 2; + hwif->hwif_data = pmif; + pmac_ide_init_hwif_ports(&hwif->hw, pmif->regbase, 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] || pmif->mediabay; + hwif->hold = pmif->mediabay; + hwif->udma_four = pmif->cable_80; + hwif->drives[0].unmask = 1; + hwif->drives[1].unmask = 1; + hwif->tuneproc = pmac_ide_tuneproc; + if (pmif->kind == controller_un_ata6 + || pmif->kind == controller_k2_ata6 + || pmif->kind == controller_sh_ata6) + hwif->selectproc = pmac_ide_kauai_selectproc; + else + hwif->selectproc = pmac_ide_selectproc; + hwif->speedproc = pmac_ide_tune_chipset; + +#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK + pmu_ide_blink_enabled = pmu_hd_blink_init(); + + if (pmu_ide_blink_enabled) + hwif->led_act = pmu_hd_kick_blink; +#endif + + printk(KERN_INFO "ide%d: Found Apple %s controller, bus ID %d%s, irq %d\n", + hwif->index, model_name[pmif->kind], pmif->aapl_bus_id, + pmif->mediabay ? " (mediabay)" : "", hwif->irq); + +#ifdef CONFIG_PMAC_PBOOK + if (pmif->mediabay && check_media_bay_by_base(pmif->regbase, MB_CD) == 0) + hwif->noprobe = 0; +#endif /* CONFIG_PMAC_PBOOK */ + + hwif->sg_max_nents = MAX_DCMDS; + +#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC + /* has a DBDMA controller channel */ + if (pmif->dma_regs) + pmac_ide_setup_dma(pmif, hwif); +#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */ + + /* We probe the hwif now */ + probe_hwif_init(hwif); + + /* The code IDE code will have set hwif->present if we have devices attached, + * if we don't, the discard the interface except if we are on a media bay slot + */ + if (!hwif->present && !pmif->mediabay) { + printk(KERN_INFO "ide%d: Bus empty, interface released.\n", + hwif->index); + default_hwif_iops(hwif); + for (i = IDE_DATA_OFFSET; i <= IDE_CONTROL_OFFSET; ++i) + hwif->io_ports[i] = 0; + hwif->chipset = ide_unknown; + hwif->noprobe = 1; + return -ENODEV; + } + + return 0; +} + +/* + * Attach to a macio probed interface + */ +static int __devinit +pmac_ide_macio_attach(struct macio_dev *mdev, const struct of_match *match) +{ + void __iomem *base; + unsigned long regbase; + int irq; + ide_hwif_t *hwif; + pmac_ide_hwif_t *pmif; + int i, rc; + + i = 0; + while (i < MAX_HWIFS && (ide_hwifs[i].io_ports[IDE_DATA_OFFSET] != 0 + || pmac_ide[i].node != NULL)) + ++i; + if (i >= MAX_HWIFS) { + printk(KERN_ERR "ide-pmac: MacIO interface attach with no slot\n"); + printk(KERN_ERR " %s\n", mdev->ofdev.node->full_name); + return -ENODEV; + } + + pmif = &pmac_ide[i]; + hwif = &ide_hwifs[i]; + + if (mdev->ofdev.node->n_addrs == 0) { + printk(KERN_WARNING "ide%d: no address for %s\n", + i, mdev->ofdev.node->full_name); + return -ENXIO; + } + + /* Request memory resource for IO ports */ + if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) { + printk(KERN_ERR "ide%d: can't request mmio resource !\n", i); + return -EBUSY; + } + + /* 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. That works well enough for the single case + * where that happens though... + */ + if (macio_irq_count(mdev) == 0) { + printk(KERN_WARNING "ide%d: no intrs for device %s, using 13\n", + i, mdev->ofdev.node->full_name); + irq = 13; + } else + irq = macio_irq(mdev, 0); + + base = ioremap(macio_resource_start(mdev, 0), 0x400); + regbase = (unsigned long) base; + + hwif->pci_dev = mdev->bus->pdev; + hwif->gendev.parent = &mdev->ofdev.dev; + + pmif->mdev = mdev; + pmif->node = mdev->ofdev.node; + pmif->regbase = regbase; + pmif->irq = irq; + pmif->kauai_fcr = NULL; +#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC + if (macio_resource_count(mdev) >= 2) { + if (macio_request_resource(mdev, 1, "ide-pmac (dma)")) + printk(KERN_WARNING "ide%d: can't request DMA resource !\n", i); + else + pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000); + } else + pmif->dma_regs = NULL; +#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */ + dev_set_drvdata(&mdev->ofdev.dev, hwif); + + rc = pmac_ide_setup_device(pmif, hwif); + if (rc != 0) { + /* The inteface is released to the common IDE layer */ + dev_set_drvdata(&mdev->ofdev.dev, NULL); + iounmap(base); + if (pmif->dma_regs) + iounmap(pmif->dma_regs); + memset(pmif, 0, sizeof(*pmif)); + macio_release_resource(mdev, 0); + if (pmif->dma_regs) + macio_release_resource(mdev, 1); + } + + return rc; +} + +static int +pmac_ide_macio_suspend(struct macio_dev *mdev, u32 state) +{ + ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev); + int rc = 0; + + if (state != mdev->ofdev.dev.power.power_state && state >= 2) { + rc = pmac_ide_do_suspend(hwif); + if (rc == 0) + mdev->ofdev.dev.power.power_state = state; + } + + return rc; +} + +static int +pmac_ide_macio_resume(struct macio_dev *mdev) +{ + ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev); + int rc = 0; + + if (mdev->ofdev.dev.power.power_state != 0) { + rc = pmac_ide_do_resume(hwif); + if (rc == 0) + mdev->ofdev.dev.power.power_state = 0; + } + + return rc; +} + +/* + * Attach to a PCI probed interface + */ +static int __devinit +pmac_ide_pci_attach(struct pci_dev *pdev, const struct pci_device_id *id) +{ + ide_hwif_t *hwif; + struct device_node *np; + pmac_ide_hwif_t *pmif; + void __iomem *base; + unsigned long rbase, rlen; + int i, rc; + + np = pci_device_to_OF_node(pdev); + if (np == NULL) { + printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n"); + return -ENODEV; + } + i = 0; + while (i < MAX_HWIFS && (ide_hwifs[i].io_ports[IDE_DATA_OFFSET] != 0 + || pmac_ide[i].node != NULL)) + ++i; + if (i >= MAX_HWIFS) { + printk(KERN_ERR "ide-pmac: PCI interface attach with no slot\n"); + printk(KERN_ERR " %s\n", np->full_name); + return -ENODEV; + } + + pmif = &pmac_ide[i]; + hwif = &ide_hwifs[i]; + + if (pci_enable_device(pdev)) { + printk(KERN_WARNING "ide%i: Can't enable PCI device for %s\n", + i, np->full_name); + return -ENXIO; + } + pci_set_master(pdev); + + if (pci_request_regions(pdev, "Kauai ATA")) { + printk(KERN_ERR "ide%d: Cannot obtain PCI resources for %s\n", + i, np->full_name); + return -ENXIO; + } + + hwif->pci_dev = pdev; + hwif->gendev.parent = &pdev->dev; + pmif->mdev = NULL; + pmif->node = np; + + rbase = pci_resource_start(pdev, 0); + rlen = pci_resource_len(pdev, 0); + + base = ioremap(rbase, rlen); + pmif->regbase = (unsigned long) base + 0x2000; +#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC + pmif->dma_regs = base + 0x1000; +#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */ + pmif->kauai_fcr = base; + pmif->irq = pdev->irq; + + pci_set_drvdata(pdev, hwif); + + rc = pmac_ide_setup_device(pmif, hwif); + if (rc != 0) { + /* The inteface is released to the common IDE layer */ + pci_set_drvdata(pdev, NULL); + iounmap(base); + memset(pmif, 0, sizeof(*pmif)); + pci_release_regions(pdev); + } + + return rc; +} + +static int +pmac_ide_pci_suspend(struct pci_dev *pdev, u32 state) +{ + ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev); + int rc = 0; + + if (state != pdev->dev.power.power_state && state >= 2) { + rc = pmac_ide_do_suspend(hwif); + if (rc == 0) + pdev->dev.power.power_state = state; + } + + return rc; +} + +static int +pmac_ide_pci_resume(struct pci_dev *pdev) +{ + ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev); + int rc = 0; + + if (pdev->dev.power.power_state != 0) { + rc = pmac_ide_do_resume(hwif); + if (rc == 0) + pdev->dev.power.power_state = 0; + } + + return rc; +} + +static struct of_match pmac_ide_macio_match[] = +{ + { + .name = "IDE", + .type = OF_ANY_MATCH, + .compatible = OF_ANY_MATCH + }, + { + .name = "ATA", + .type = OF_ANY_MATCH, + .compatible = OF_ANY_MATCH + }, + { + .name = OF_ANY_MATCH, + .type = "ide", + .compatible = OF_ANY_MATCH + }, + { + .name = OF_ANY_MATCH, + .type = "ata", + .compatible = OF_ANY_MATCH + }, + {}, +}; + +static struct macio_driver pmac_ide_macio_driver = +{ + .name = "ide-pmac", + .match_table = pmac_ide_macio_match, + .probe = pmac_ide_macio_attach, + .suspend = pmac_ide_macio_suspend, + .resume = pmac_ide_macio_resume, +}; + +static struct pci_device_id pmac_ide_pci_match[] = { + { PCI_VENDOR_ID_APPLE, PCI_DEVIEC_ID_APPLE_UNI_N_ATA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_ATA, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, +}; + +static struct pci_driver pmac_ide_pci_driver = { + .name = "ide-pmac", + .id_table = pmac_ide_pci_match, + .probe = pmac_ide_pci_attach, + .suspend = pmac_ide_pci_suspend, + .resume = pmac_ide_pci_resume, +}; +MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match); + +void __init +pmac_ide_probe(void) +{ + if (_machine != _MACH_Pmac) + return; + +#ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST + pci_register_driver(&pmac_ide_pci_driver); + macio_register_driver(&pmac_ide_macio_driver); +#else + macio_register_driver(&pmac_ide_macio_driver); + pci_register_driver(&pmac_ide_pci_driver); +#endif +} + +#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC + +/* + * pmac_ide_build_dmatable builds the DBDMA command list + * for a transfer and sets the DBDMA channel to point to it. + */ +static int __pmac +pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq) +{ + struct dbdma_cmd *table; + int i, count = 0; + ide_hwif_t *hwif = HWIF(drive); + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data; + volatile struct dbdma_regs __iomem *dma = pmif->dma_regs; + struct scatterlist *sg; + int wr = (rq_data_dir(rq) == WRITE); + + /* DMA table is already aligned */ + table = (struct dbdma_cmd *) pmif->dma_table_cpu; + + /* Make sure DMA controller is stopped (necessary ?) */ + writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control); + while (readl(&dma->status) & RUN) + udelay(1); + + hwif->sg_nents = i = ide_build_sglist(drive, rq); + + if (!i) + return 0; + + /* Build DBDMA commands list */ + sg = hwif->sg_table; + while (i && sg_dma_len(sg)) { + u32 cur_addr; + u32 cur_len; + + cur_addr = sg_dma_address(sg); + cur_len = sg_dma_len(sg); + + if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) { + if (pmif->broken_dma_warn == 0) { + printk(KERN_WARNING "%s: DMA on non aligned address," + "switching to PIO on Ohare chipset\n", drive->name); + pmif->broken_dma_warn = 1; + } + goto use_pio_instead; + } + 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); + goto use_pio_instead; + } + 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); + /* add the stop command to the end of the list */ + memset(table, 0, sizeof(struct dbdma_cmd)); + st_le16(&table->command, DBDMA_STOP); + mb(); + writel(hwif->dmatable_dma, &dma->cmdptr); + return 1; + } + + printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name); + use_pio_instead: + pci_unmap_sg(hwif->pci_dev, + hwif->sg_table, + hwif->sg_nents, + hwif->sg_dma_direction); + return 0; /* revert to PIO for this request */ +} + +/* Teardown mappings after DMA has completed. */ +static void __pmac +pmac_ide_destroy_dmatable (ide_drive_t *drive) +{ + ide_hwif_t *hwif = drive->hwif; + struct pci_dev *dev = HWIF(drive)->pci_dev; + struct scatterlist *sg = hwif->sg_table; + int nents = hwif->sg_nents; + + if (nents) { + pci_unmap_sg(dev, sg, nents, hwif->sg_dma_direction); + hwif->sg_nents = 0; + } +} + +/* + * Pick up best MDMA timing for the drive and apply it + */ +static int __pmac +pmac_ide_mdma_enable(ide_drive_t *drive, u16 mode) +{ + ide_hwif_t *hwif = HWIF(drive); + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data; + int drive_cycle_time; + struct hd_driveid *id = drive->id; + u32 *timings, *timings2; + u32 timing_local[2]; + int ret; + + /* which drive is it ? */ + timings = &pmif->timings[drive->select.b.unit & 0x01]; + timings2 = &pmif->timings[(drive->select.b.unit & 0x01) + 2]; + + /* 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; + + /* Copy timings to local image */ + timing_local[0] = *timings; + timing_local[1] = *timings2; + + /* Calculate controller timings */ + ret = set_timings_mdma( drive, pmif->kind, + &timing_local[0], + &timing_local[1], + mode, + drive_cycle_time); + if (ret) + return 0; + + /* Set feature on drive */ + printk(KERN_INFO "%s: Enabling MultiWord DMA %d\n", drive->name, mode & 0xf); + ret = pmac_ide_do_setfeature(drive, mode); + if (ret) { + printk(KERN_WARNING "%s: Failed !\n", drive->name); + return 0; + } + + /* Apply timings to controller */ + *timings = timing_local[0]; + *timings2 = timing_local[1]; + + /* Set speed info in drive */ + drive->current_speed = mode; + if (!drive->init_speed) + drive->init_speed = mode; + + return 1; +} + +/* + * Pick up best UDMA timing for the drive and apply it + */ +static int __pmac +pmac_ide_udma_enable(ide_drive_t *drive, u16 mode) +{ + ide_hwif_t *hwif = HWIF(drive); + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data; + u32 *timings, *timings2; + u32 timing_local[2]; + int ret; + + /* which drive is it ? */ + timings = &pmif->timings[drive->select.b.unit & 0x01]; + timings2 = &pmif->timings[(drive->select.b.unit & 0x01) + 2]; + + /* Copy timings to local image */ + timing_local[0] = *timings; + timing_local[1] = *timings2; + + /* Calculate timings for interface */ + if (pmif->kind == controller_un_ata6 + || pmif->kind == controller_k2_ata6) + ret = set_timings_udma_ata6( &timing_local[0], + &timing_local[1], + mode); + else if (pmif->kind == controller_sh_ata6) + ret = set_timings_udma_shasta( &timing_local[0], + &timing_local[1], + mode); + else + ret = set_timings_udma_ata4(&timing_local[0], mode); + if (ret) + return 0; + + /* Set feature on drive */ + printk(KERN_INFO "%s: Enabling Ultra DMA %d\n", drive->name, mode & 0x0f); + ret = pmac_ide_do_setfeature(drive, mode); + if (ret) { + printk(KERN_WARNING "%s: Failed !\n", drive->name); + return 0; + } + + /* Apply timings to controller */ + *timings = timing_local[0]; + *timings2 = timing_local[1]; + + /* Set speed info in drive */ + drive->current_speed = mode; + if (!drive->init_speed) + drive->init_speed = mode; + + return 1; +} + +/* + * Check what is the best DMA timing setting for the drive and + * call appropriate functions to apply it. + */ +static int __pmac +pmac_ide_dma_check(ide_drive_t *drive) +{ + struct hd_driveid *id = drive->id; + ide_hwif_t *hwif = HWIF(drive); + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data; + int enable = 1; + int map; + drive->using_dma = 0; + + if (drive->media == ide_floppy) + enable = 0; + if (((id->capability & 1) == 0) && !__ide_dma_good_drive(drive)) + enable = 0; + if (__ide_dma_bad_drive(drive)) + enable = 0; + + if (enable) { + short mode; + + map = XFER_MWDMA; + if (pmif->kind == controller_kl_ata4 + || pmif->kind == controller_un_ata6 + || pmif->kind == controller_k2_ata6 + || pmif->kind == controller_sh_ata6) { + map |= XFER_UDMA; + if (pmif->cable_80) { + map |= XFER_UDMA_66; + if (pmif->kind == controller_un_ata6 || + pmif->kind == controller_k2_ata6 || + pmif->kind == controller_sh_ata6) + map |= XFER_UDMA_100; + if (pmif->kind == controller_sh_ata6) + map |= XFER_UDMA_133; + } + } + mode = ide_find_best_mode(drive, map); + if (mode & XFER_UDMA) + drive->using_dma = pmac_ide_udma_enable(drive, mode); + else if (mode & XFER_MWDMA) + drive->using_dma = pmac_ide_mdma_enable(drive, mode); + hwif->OUTB(0, IDE_CONTROL_REG); + /* Apply settings to controller */ + pmac_ide_do_update_timings(drive); + } + return 0; +} + +/* + * Prepare a DMA transfer. We build the DMA table, adjust the timings for + * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion + */ +static int __pmac +pmac_ide_dma_setup(ide_drive_t *drive) +{ + ide_hwif_t *hwif = HWIF(drive); + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data; + struct request *rq = HWGROUP(drive)->rq; + u8 unit = (drive->select.b.unit & 0x01); + u8 ata4; + + if (pmif == NULL) + return 1; + ata4 = (pmif->kind == controller_kl_ata4); + + if (!pmac_ide_build_dmatable(drive, rq)) { + ide_map_sg(drive, rq); + return 1; + } + + /* Apple adds 60ns to wrDataSetup on reads */ + if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) { + writel(pmif->timings[unit] + (!rq_data_dir(rq) ? 0x00800000UL : 0), + PMAC_IDE_REG(IDE_TIMING_CONFIG)); + (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG)); + } + + drive->waiting_for_dma = 1; + + return 0; +} + +static void __pmac +pmac_ide_dma_exec_cmd(ide_drive_t *drive, u8 command) +{ + /* issue cmd to drive */ + ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, NULL); +} + +/* + * Kick the DMA controller into life after the DMA command has been issued + * to the drive. + */ +static void __pmac +pmac_ide_dma_start(ide_drive_t *drive) +{ + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + volatile struct dbdma_regs __iomem *dma; + + dma = pmif->dma_regs; + + writel((RUN << 16) | RUN, &dma->control); + /* Make sure it gets to the controller right now */ + (void)readl(&dma->control); +} + +/* + * After a DMA transfer, make sure the controller is stopped + */ +static int __pmac +pmac_ide_dma_end (ide_drive_t *drive) +{ + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + volatile struct dbdma_regs __iomem *dma; + u32 dstat; + + if (pmif == NULL) + return 0; + dma = pmif->dma_regs; + + drive->waiting_for_dma = 0; + dstat = readl(&dma->status); + writel(((RUN|WAKE|DEAD) << 16), &dma->control); + pmac_ide_destroy_dmatable(drive); + /* verify good dma status. we don't check for ACTIVE beeing 0. We should... + * in theory, but with ATAPI decices doing buffer underruns, that would + * cause us to disable DMA, which isn't what we want + */ + return (dstat & (RUN|DEAD)) != RUN; +} + +/* + * Check out that the interrupt we got was for us. We can't always know this + * for sure with those Apple interfaces (well, we could on the recent ones but + * that's not implemented yet), on the other hand, we don't have shared interrupts + * so it's not really a problem + */ +static int __pmac +pmac_ide_dma_test_irq (ide_drive_t *drive) +{ + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + volatile struct dbdma_regs __iomem *dma; + unsigned long status, timeout; + + if (pmif == NULL) + return 0; + dma = pmif->dma_regs; + + /* We have to things to deal with here: + * + * - The dbdma won't stop if the command was started + * but completed with an error without transferring 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. + * + */ + + /* If ACTIVE is cleared, the STOP command have passed and + * transfer is complete. + */ + status = readl(&dma->status); + if (!(status & ACTIVE)) + return 1; + if (!drive->waiting_for_dma) + printk(KERN_WARNING "ide%d, ide_dma_test_irq \ + called while not waiting\n", HWIF(drive)->index); + + /* If dbdma didn't execute the STOP command yet, the + * active bit is still set. We consider that we aren't + * sharing interrupts (which is hopefully the case with + * those controllers) and so we just try to flush the + * channel for pending data in the fifo + */ + udelay(1); + writel((FLUSH << 16) | FLUSH, &dma->control); + timeout = 0; + for (;;) { + udelay(1); + status = readl(&dma->status); + if ((status & FLUSH) == 0) + break; + if (++timeout > 100) { + printk(KERN_WARNING "ide%d, ide_dma_test_irq \ + timeout flushing channel\n", HWIF(drive)->index); + break; + } + } + return 1; +} + +static int __pmac +pmac_ide_dma_host_off (ide_drive_t *drive) +{ + return 0; +} + +static int __pmac +pmac_ide_dma_host_on (ide_drive_t *drive) +{ + return 0; +} + +static int __pmac +pmac_ide_dma_lostirq (ide_drive_t *drive) +{ + pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data; + volatile struct dbdma_regs __iomem *dma; + unsigned long status; + + if (pmif == NULL) + return 0; + dma = pmif->dma_regs; + + status = readl(&dma->status); + printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status); + return 0; +} + +/* + * Allocate the data structures needed for using DMA with an interface + * and fill the proper list of functions pointers + */ +static void __init +pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif) +{ + /* We won't need pci_dev if we switch to generic consistent + * DMA routines ... + */ + if (hwif->pci_dev == NULL) + return; + /* + * 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( + hwif->pci_dev, + (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd), + &hwif->dmatable_dma); + if (pmif->dma_table_cpu == NULL) { + printk(KERN_ERR "%s: unable to allocate DMA command list\n", + hwif->name); + return; + } + + hwif->ide_dma_off_quietly = &__ide_dma_off_quietly; + hwif->ide_dma_on = &__ide_dma_on; + hwif->ide_dma_check = &pmac_ide_dma_check; + hwif->dma_setup = &pmac_ide_dma_setup; + hwif->dma_exec_cmd = &pmac_ide_dma_exec_cmd; + hwif->dma_start = &pmac_ide_dma_start; + hwif->ide_dma_end = &pmac_ide_dma_end; + hwif->ide_dma_test_irq = &pmac_ide_dma_test_irq; + hwif->ide_dma_host_off = &pmac_ide_dma_host_off; + hwif->ide_dma_host_on = &pmac_ide_dma_host_on; + hwif->ide_dma_timeout = &__ide_dma_timeout; + hwif->ide_dma_lostirq = &pmac_ide_dma_lostirq; + + hwif->atapi_dma = 1; + switch(pmif->kind) { + case controller_sh_ata6: + hwif->ultra_mask = pmif->cable_80 ? 0x7f : 0x07; + hwif->mwdma_mask = 0x07; + hwif->swdma_mask = 0x00; + break; + case controller_un_ata6: + case controller_k2_ata6: + hwif->ultra_mask = pmif->cable_80 ? 0x3f : 0x07; + hwif->mwdma_mask = 0x07; + hwif->swdma_mask = 0x00; + break; + case controller_kl_ata4: + hwif->ultra_mask = pmif->cable_80 ? 0x1f : 0x07; + hwif->mwdma_mask = 0x07; + hwif->swdma_mask = 0x00; + break; + default: + hwif->ultra_mask = 0x00; + hwif->mwdma_mask = 0x07; + hwif->swdma_mask = 0x00; + break; + } +} + +#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */ |