--- /dev/null
+/*
+ * 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
+ * Copyright (C) 2007-2008 Bartlomiej Zolnierkiewicz
+ *
+ * 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/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/notifier.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/pci.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.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>
+#include <asm/mediabay.h>
+
+#define DRV_NAME "ide-pmac"
+
+#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 broken_dma : 1;
+ unsigned broken_dma_warn : 1;
+ struct device_node* node;
+ struct macio_dev *mdev;
+ u32 timings[4];
+ volatile u32 __iomem * *kauai_fcr;
+ ide_hwif_t *hwif;
+
+ /* 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;
+} pmac_ide_hwif_t;
+
+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
+
+/* 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[] =
+{
+ { 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[] =
+{
+ { 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[] =
+{
+ { 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[] =
+{
+ { 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[] =
+{
+ { 930 , 0x08000fff },
+ { 600 , 0x08000a92 },
+ { 383 , 0x0800060f },
+ { 360 , 0x08000492 },
+ { 330 , 0x0800048f },
+ { 300 , 0x080003cf },
+ { 270 , 0x080003cc },
+ { 240 , 0x0800038b },
+ { 239 , 0x0800030c },
+ { 180 , 0x05000249 },
+ { 120 , 0x04000148 },
+ { 0 , 0 },
+};
+
+static struct kauai_timing kauai_mdma_timings[] =
+{
+ { 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[] =
+{
+ { 120 , 0x000070c0 },
+ { 90 , 0x00005d80 },
+ { 60 , 0x00004a60 },
+ { 45 , 0x00003a50 },
+ { 30 , 0x00002a30 },
+ { 20 , 0x00002921 },
+ { 0 , 0 },
+};
+
+static struct kauai_timing shasta_pio_timings[] =
+{
+ { 930 , 0x08000fff },
+ { 600 , 0x0A000c97 },
+ { 383 , 0x07000712 },
+ { 360 , 0x040003cd },
+ { 330 , 0x040003cd },
+ { 300 , 0x040003cd },
+ { 270 , 0x040003cd },
+ { 240 , 0x040003cd },
+ { 239 , 0x040003cd },
+ { 180 , 0x0400028b },
+ { 120 , 0x0400010a },
+ { 0 , 0 },
+};
+
+static struct kauai_timing shasta_mdma_timings[] =
+{
+ { 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[] =
+{
+ { 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;
+ BUG();
+ 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 int pmac_ide_init_dma(ide_hwif_t *, const struct ide_port_info *);
+
+#define PMAC_IDE_REG(x) \
+ ((void __iomem *)((drive)->hwif->io_ports.data_addr + (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_ide_apply_timings(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+ if (drive->dn & 1)
+ 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_ide_kauai_apply_timings(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+ if (drive->dn & 1) {
+ 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_ide_do_update_timings(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+ if (pmif->kind == controller_sh_ata6 ||
+ pmif->kind == controller_un_ata6 ||
+ pmif->kind == controller_k2_ata6)
+ pmac_ide_kauai_apply_timings(drive);
+ else
+ pmac_ide_apply_timings(drive);
+}
+
+static void pmac_dev_select(ide_drive_t *drive)
+{
+ pmac_ide_apply_timings(drive);
+
+ writeb(drive->select | ATA_DEVICE_OBS,
+ (void __iomem *)drive->hwif->io_ports.device_addr);
+}
+
+static void pmac_kauai_dev_select(ide_drive_t *drive)
+{
+ pmac_ide_kauai_apply_timings(drive);
+
+ writeb(drive->select | ATA_DEVICE_OBS,
+ (void __iomem *)drive->hwif->io_ports.device_addr);
+}
+
+static void pmac_exec_command(ide_hwif_t *hwif, u8 cmd)
+{
+ writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
+ (void)readl((void __iomem *)(hwif->io_ports.data_addr
+ + IDE_TIMING_CONFIG));
+}
+
+static void pmac_write_devctl(ide_hwif_t *hwif, u8 ctl)
+{
+ writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
+ (void)readl((void __iomem *)(hwif->io_ports.data_addr
+ + IDE_TIMING_CONFIG));
+}
+
+/*
+ * Old tuning functions (called on hdparm -p), sets up drive PIO timings
+ */
+static void pmac_ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ const u8 pio = drive->pio_mode - XFER_PIO_0;
+ struct ide_timing *tim = ide_timing_find_mode(XFER_PIO_0 + pio);
+ u32 *timings, t;
+ unsigned accessTicks, recTicks;
+ unsigned accessTime, recTime;
+ unsigned int cycle_time;
+
+ /* which drive is it ? */
+ timings = &pmif->timings[drive->dn & 1];
+ t = *timings;
+
+ cycle_time = ide_pio_cycle_time(drive, pio);
+
+ switch (pmif->kind) {
+ case controller_sh_ata6: {
+ /* 133Mhz cell */
+ u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
+ t = (t & ~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, cycle_time);
+ t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
+ break;
+ }
+ case controller_kl_ata4:
+ /* 66Mhz cell */
+ recTime = cycle_time - tim->active - tim->setup;
+ recTime = max(recTime, 150U);
+ accessTime = tim->active;
+ accessTime = max(accessTime, 150U);
+ accessTicks = SYSCLK_TICKS_66(accessTime);
+ accessTicks = min(accessTicks, 0x1fU);
+ recTicks = SYSCLK_TICKS_66(recTime);
+ recTicks = min(recTicks, 0x1fU);
+ t = (t & ~TR_66_PIO_MASK) |
+ (accessTicks << TR_66_PIO_ACCESS_SHIFT) |
+ (recTicks << TR_66_PIO_RECOVERY_SHIFT);
+ break;
+ default: {
+ /* 33Mhz cell */
+ int ebit = 0;
+ recTime = cycle_time - tim->active - tim->setup;
+ recTime = max(recTime, 150U);
+ accessTime = tim->active;
+ 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;
+ }
+ t = (t & ~TR_33_PIO_MASK) |
+ (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
+ (recTicks << TR_33_PIO_RECOVERY_SHIFT);
+ if (ebit)
+ t |= 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
+
+ *timings = t;
+ pmac_ide_do_update_timings(drive);
+}
+
+/*
+ * Calculate KeyLargo ATA/66 UDMA timings
+ */
+static int
+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
+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);
+ *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
+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);
+ *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 void
+set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
+ u8 speed)
+{
+ u16 *id = drive->id;
+ 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:
+ BUG();
+ break;
+ }
+
+ /* Check if drive provides explicit DMA cycle time */
+ if ((id[ATA_ID_FIELD_VALID] & 2) && id[ATA_ID_EIDE_DMA_TIME])
+ cycleTime = max_t(int, id[ATA_ID_EIDE_DMA_TIME], cycleTime);
+
+ /* 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++;
+ }
+ 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);
+ *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);
+ *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
+}
+
+static void pmac_ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ int ret = 0;
+ u32 *timings, *timings2, tl[2];
+ u8 unit = drive->dn & 1;
+ const u8 speed = drive->dma_mode;
+
+ timings = &pmif->timings[unit];
+ timings2 = &pmif->timings[unit+2];
+
+ /* Copy timings to local image */
+ tl[0] = *timings;
+ tl[1] = *timings2;
+
+ if (speed >= XFER_UDMA_0) {
+ if (pmif->kind == controller_kl_ata4)
+ ret = set_timings_udma_ata4(&tl[0], speed);
+ else if (pmif->kind == controller_un_ata6
+ || pmif->kind == controller_k2_ata6)
+ ret = set_timings_udma_ata6(&tl[0], &tl[1], speed);
+ else if (pmif->kind == controller_sh_ata6)
+ ret = set_timings_udma_shasta(&tl[0], &tl[1], speed);
+ else
+ ret = -1;
+ } else
+ set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
+
+ if (ret)
+ return;
+
+ /* Apply timings to controller */
+ *timings = tl[0];
+ *timings2 = tl[1];
+
+ pmac_ide_do_update_timings(drive);
+}
+
+/*
+ * Blast some well known "safe" values to the timing registers at init or
+ * wakeup from sleep time, before we do real calculation
+ */
+static void
+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;
+}
+
+static int on_media_bay(pmac_ide_hwif_t *pmif)
+{
+ return pmif->mdev && pmif->mdev->media_bay != NULL;
+}
+
+/* Suspend call back, should be called after the child devices
+ * have actually been suspended
+ */
+static int pmac_ide_do_suspend(pmac_ide_hwif_t *pmif)
+{
+ /* We clear the timings */
+ pmif->timings[0] = 0;
+ pmif->timings[1] = 0;
+
+ disable_irq(pmif->irq);
+
+ /* The media bay will handle itself just fine */
+ if (on_media_bay(pmif))
+ 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(pmac_ide_hwif_t *pmif)
+{
+ /* Hard reset & re-enable controller (do we really need to reset ? -BenH) */
+ if (!on_media_bay(pmif)) {
+ 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);
+
+ /* 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);
+ }
+
+ msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
+ }
+
+ /* Sanitize drive timings */
+ sanitize_timings(pmif);
+
+ enable_irq(pmif->irq);
+
+ return 0;
+}
+
+static u8 pmac_ide_cable_detect(ide_hwif_t *hwif)
+{
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ struct device_node *np = pmif->node;
+ const char *cable = of_get_property(np, "cable-type", NULL);
+ struct device_node *root = of_find_node_by_path("/");
+ const char *model = of_get_property(root, "model", NULL);
+
+ /* Get cable type from device-tree. */
+ if (cable && !strncmp(cable, "80-", 3)) {
+ /* Some drives fail to detect 80c cable in PowerBook */
+ /* These machine use proprietary short IDE cable anyway */
+ if (!strncmp(model, "PowerBook", 9))
+ return ATA_CBL_PATA40_SHORT;
+ else
+ return ATA_CBL_PATA80;
+ }
+
+ /*
+ * 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 (of_device_is_compatible(np, "K2-UATA") ||
+ of_device_is_compatible(np, "shasta-ata"))
+ return ATA_CBL_PATA80;
+
+ return ATA_CBL_PATA40;
+}
+
+static void pmac_ide_init_dev(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+ if (on_media_bay(pmif)) {
+ if (check_media_bay(pmif->mdev->media_bay) == MB_CD) {
+ drive->dev_flags &= ~IDE_DFLAG_NOPROBE;
+ return;
+ }
+ drive->dev_flags |= IDE_DFLAG_NOPROBE;
+ }
+}
+
+static const struct ide_tp_ops pmac_tp_ops = {
+ .exec_command = pmac_exec_command,
+ .read_status = ide_read_status,
+ .read_altstatus = ide_read_altstatus,
+ .write_devctl = pmac_write_devctl,
+
+ .dev_select = pmac_dev_select,
+ .tf_load = ide_tf_load,
+ .tf_read = ide_tf_read,
+
+ .input_data = ide_input_data,
+ .output_data = ide_output_data,
+};
+
+static const struct ide_tp_ops pmac_ata6_tp_ops = {
+ .exec_command = pmac_exec_command,
+ .read_status = ide_read_status,
+ .read_altstatus = ide_read_altstatus,
+ .write_devctl = pmac_write_devctl,
+
+ .dev_select = pmac_kauai_dev_select,
+ .tf_load = ide_tf_load,
+ .tf_read = ide_tf_read,
+
+ .input_data = ide_input_data,
+ .output_data = ide_output_data,
+};
+
+static const struct ide_port_ops pmac_ide_ata4_port_ops = {
+ .init_dev = pmac_ide_init_dev,
+ .set_pio_mode = pmac_ide_set_pio_mode,
+ .set_dma_mode = pmac_ide_set_dma_mode,
+ .cable_detect = pmac_ide_cable_detect,
+};
+
+static const struct ide_port_ops pmac_ide_port_ops = {
+ .init_dev = pmac_ide_init_dev,
+ .set_pio_mode = pmac_ide_set_pio_mode,
+ .set_dma_mode = pmac_ide_set_dma_mode,
+};
+
+static const struct ide_dma_ops pmac_dma_ops;
+
+static const struct ide_port_info pmac_port_info = {
+ .name = DRV_NAME,
+ .init_dma = pmac_ide_init_dma,
+ .chipset = ide_pmac,
+ .tp_ops = &pmac_tp_ops,
+ .port_ops = &pmac_ide_port_ops,
+ .dma_ops = &pmac_dma_ops,
+ .host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
+ IDE_HFLAG_POST_SET_MODE |
+ IDE_HFLAG_MMIO |
+ IDE_HFLAG_UNMASK_IRQS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+};
+
+/*
+ * Setup, register & probe an IDE channel driven by this driver, this is
+ * called by one of the 2 probe functions (macio or PCI).
+ */
+static int pmac_ide_setup_device(pmac_ide_hwif_t *pmif, struct ide_hw *hw)
+{
+ struct device_node *np = pmif->node;
+ const int *bidp;
+ struct ide_host *host;
+ ide_hwif_t *hwif;
+ struct ide_hw *hws[] = { hw };
+ struct ide_port_info d = pmac_port_info;
+ int rc;
+
+ pmif->broken_dma = pmif->broken_dma_warn = 0;
+ if (of_device_is_compatible(np, "shasta-ata")) {
+ pmif->kind = controller_sh_ata6;
+ d.tp_ops = &pmac_ata6_tp_ops;
+ d.port_ops = &pmac_ide_ata4_port_ops;
+ d.udma_mask = ATA_UDMA6;
+ } else if (of_device_is_compatible(np, "kauai-ata")) {
+ pmif->kind = controller_un_ata6;
+ d.tp_ops = &pmac_ata6_tp_ops;
+ d.port_ops = &pmac_ide_ata4_port_ops;
+ d.udma_mask = ATA_UDMA5;
+ } else if (of_device_is_compatible(np, "K2-UATA")) {
+ pmif->kind = controller_k2_ata6;
+ d.tp_ops = &pmac_ata6_tp_ops;
+ d.port_ops = &pmac_ide_ata4_port_ops;
+ d.udma_mask = ATA_UDMA5;
+ } else if (of_device_is_compatible(np, "keylargo-ata")) {
+ if (strcmp(np->name, "ata-4") == 0) {
+ pmif->kind = controller_kl_ata4;
+ d.port_ops = &pmac_ide_ata4_port_ops;
+ d.udma_mask = ATA_UDMA4;
+ } else
+ pmif->kind = controller_kl_ata3;
+ } else if (of_device_is_compatible(np, "heathrow-ata")) {
+ pmif->kind = controller_heathrow;
+ } else {
+ pmif->kind = controller_ohare;
+ pmif->broken_dma = 1;
+ }
+
+ bidp = of_get_property(np, "AAPL,bus-id", NULL);
+ pmif->aapl_bus_id = bidp ? *bidp : 0;
+
+ /* 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);
+
+ /* Make sure we have sane timings */
+ sanitize_timings(pmif);
+
+ /* If we are on a media bay, wait for it to settle and lock it */
+ if (pmif->mdev)
+ lock_media_bay(pmif->mdev->media_bay);
+
+ host = ide_host_alloc(&d, hws, 1);
+ if (host == NULL) {
+ rc = -ENOMEM;
+ goto bail;
+ }
+ hwif = pmif->hwif = host->ports[0];
+
+ if (on_media_bay(pmif)) {
+ /* Fixup bus ID for media bay */
+ 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 {
+ /* 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));
+ }
+
+ printk(KERN_INFO DRV_NAME ": Found Apple %s controller (%s), "
+ "bus ID %d%s, irq %d\n", model_name[pmif->kind],
+ pmif->mdev ? "macio" : "PCI", pmif->aapl_bus_id,
+ on_media_bay(pmif) ? " (mediabay)" : "", hw->irq);
+
+ rc = ide_host_register(host, &d, hws);
+ if (rc)
+ pmif->hwif = NULL;
+
+ if (pmif->mdev)
+ unlock_media_bay(pmif->mdev->media_bay);
+
+ bail:
+ if (rc && host)
+ ide_host_free(host);
+ return rc;
+}
+
+static void pmac_ide_init_ports(struct ide_hw *hw, unsigned long base)
+{
+ int i;
+
+ for (i = 0; i < 8; ++i)
+ hw->io_ports_array[i] = base + i * 0x10;
+
+ hw->io_ports.ctl_addr = base + 0x160;
+}
+
+/*
+ * Attach to a macio probed interface
+ */
+static int pmac_ide_macio_attach(struct macio_dev *mdev,
+ const struct of_device_id *match)
+{
+ void __iomem *base;
+ unsigned long regbase;
+ pmac_ide_hwif_t *pmif;
+ int irq, rc;
+ struct ide_hw hw;
+
+ pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
+ if (pmif == NULL)
+ return -ENOMEM;
+
+ if (macio_resource_count(mdev) == 0) {
+ printk(KERN_WARNING "ide-pmac: no address for %s\n",
+ mdev->ofdev.dev.of_node->full_name);
+ rc = -ENXIO;
+ goto out_free_pmif;
+ }
+
+ /* Request memory resource for IO ports */
+ if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
+ printk(KERN_ERR "ide-pmac: can't request MMIO resource for "
+ "%s!\n", mdev->ofdev.dev.of_node->full_name);
+ rc = -EBUSY;
+ goto out_free_pmif;
+ }
+
+ /* 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-pmac: no intrs for device %s, using "
+ "13\n", mdev->ofdev.dev.of_node->full_name);
+ irq = irq_create_mapping(NULL, 13);
+ } else
+ irq = macio_irq(mdev, 0);
+
+ base = ioremap(macio_resource_start(mdev, 0), 0x400);
+ regbase = (unsigned long) base;
+
+ pmif->mdev = mdev;
+ pmif->node = mdev->ofdev.dev.of_node;
+ pmif->regbase = regbase;
+ pmif->irq = irq;
+ pmif->kauai_fcr = NULL;
+
+ if (macio_resource_count(mdev) >= 2) {
+ if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
+ printk(KERN_WARNING "ide-pmac: can't request DMA "
+ "resource for %s!\n",
+ mdev->ofdev.dev.of_node->full_name);
+ else
+ pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
+ } else
+ pmif->dma_regs = NULL;
+
+ dev_set_drvdata(&mdev->ofdev.dev, pmif);
+
+ memset(&hw, 0, sizeof(hw));
+ pmac_ide_init_ports(&hw, pmif->regbase);
+ hw.irq = irq;
+ hw.dev = &mdev->bus->pdev->dev;
+ hw.parent = &mdev->ofdev.dev;
+
+ rc = pmac_ide_setup_device(pmif, &hw);
+ 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);
+ macio_release_resource(mdev, 1);
+ }
+ macio_release_resource(mdev, 0);
+ kfree(pmif);
+ }
+
+ return rc;
+
+out_free_pmif:
+ kfree(pmif);
+ return rc;
+}
+
+static int
+pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
+{
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
+ int rc = 0;
+
+ if (mesg.event != mdev->ofdev.dev.power.power_state.event
+ && (mesg.event & PM_EVENT_SLEEP)) {
+ rc = pmac_ide_do_suspend(pmif);
+ if (rc == 0)
+ mdev->ofdev.dev.power.power_state = mesg;
+ }
+
+ return rc;
+}
+
+static int
+pmac_ide_macio_resume(struct macio_dev *mdev)
+{
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
+ int rc = 0;
+
+ if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
+ rc = pmac_ide_do_resume(pmif);
+ if (rc == 0)
+ mdev->ofdev.dev.power.power_state = PMSG_ON;
+ }
+
+ return rc;
+}
+
+/*
+ * Attach to a PCI probed interface
+ */
+static int pmac_ide_pci_attach(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct device_node *np;
+ pmac_ide_hwif_t *pmif;
+ void __iomem *base;
+ unsigned long rbase, rlen;
+ int rc;
+ struct ide_hw hw;
+
+ 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;
+ }
+
+ pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
+ if (pmif == NULL)
+ return -ENOMEM;
+
+ if (pci_enable_device(pdev)) {
+ printk(KERN_WARNING "ide-pmac: Can't enable PCI device for "
+ "%s\n", np->full_name);
+ rc = -ENXIO;
+ goto out_free_pmif;
+ }
+ pci_set_master(pdev);
+
+ if (pci_request_regions(pdev, "Kauai ATA")) {
+ printk(KERN_ERR "ide-pmac: Cannot obtain PCI resources for "
+ "%s\n", np->full_name);
+ rc = -ENXIO;
+ goto out_free_pmif;
+ }
+
+ 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;
+ pmif->dma_regs = base + 0x1000;
+ pmif->kauai_fcr = base;
+ pmif->irq = pdev->irq;
+
+ pci_set_drvdata(pdev, pmif);
+
+ memset(&hw, 0, sizeof(hw));
+ pmac_ide_init_ports(&hw, pmif->regbase);
+ hw.irq = pdev->irq;
+ hw.dev = &pdev->dev;
+
+ rc = pmac_ide_setup_device(pmif, &hw);
+ if (rc != 0) {
+ /* The inteface is released to the common IDE layer */
+ iounmap(base);
+ pci_release_regions(pdev);
+ kfree(pmif);
+ }
+
+ return rc;
+
+out_free_pmif:
+ kfree(pmif);
+ return rc;
+}
+
+static int
+pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+ pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
+ int rc = 0;
+
+ if (mesg.event != pdev->dev.power.power_state.event
+ && (mesg.event & PM_EVENT_SLEEP)) {
+ rc = pmac_ide_do_suspend(pmif);
+ if (rc == 0)
+ pdev->dev.power.power_state = mesg;
+ }
+
+ return rc;
+}
+
+static int
+pmac_ide_pci_resume(struct pci_dev *pdev)
+{
+ pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
+ int rc = 0;
+
+ if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
+ rc = pmac_ide_do_resume(pmif);
+ if (rc == 0)
+ pdev->dev.power.power_state = PMSG_ON;
+ }
+
+ return rc;
+}
+
+#ifdef CONFIG_PMAC_MEDIABAY
+static void pmac_ide_macio_mb_event(struct macio_dev* mdev, int mb_state)
+{
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
+
+ switch(mb_state) {
+ case MB_CD:
+ if (!pmif->hwif->present)
+ ide_port_scan(pmif->hwif);
+ break;
+ default:
+ if (pmif->hwif->present)
+ ide_port_unregister_devices(pmif->hwif);
+ }
+}
+#endif /* CONFIG_PMAC_MEDIABAY */
+
+
+static struct of_device_id pmac_ide_macio_match[] =
+{
+ {
+ .name = "IDE",
+ },
+ {
+ .name = "ATA",
+ },
+ {
+ .type = "ide",
+ },
+ {
+ .type = "ata",
+ },
+ {},
+};
+
+static struct macio_driver pmac_ide_macio_driver =
+{
+ .driver = {
+ .name = "ide-pmac",
+ .owner = THIS_MODULE,
+ .of_match_table = pmac_ide_macio_match,
+ },
+ .probe = pmac_ide_macio_attach,
+ .suspend = pmac_ide_macio_suspend,
+ .resume = pmac_ide_macio_resume,
+#ifdef CONFIG_PMAC_MEDIABAY
+ .mediabay_event = pmac_ide_macio_mb_event,
+#endif
+};
+
+static const struct pci_device_id pmac_ide_pci_match[] = {
+ { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
+ { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
+ { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
+ { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
+ { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 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);
+
+int __init pmac_ide_probe(void)
+{
+ int error;
+
+ if (!machine_is(powermac))
+ return -ENODEV;
+
+#ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
+ error = pci_register_driver(&pmac_ide_pci_driver);
+ if (error)
+ goto out;
+ error = macio_register_driver(&pmac_ide_macio_driver);
+ if (error) {
+ pci_unregister_driver(&pmac_ide_pci_driver);
+ goto out;
+ }
+#else
+ error = macio_register_driver(&pmac_ide_macio_driver);
+ if (error)
+ goto out;
+ error = pci_register_driver(&pmac_ide_pci_driver);
+ if (error) {
+ macio_unregister_driver(&pmac_ide_macio_driver);
+ goto out;
+ }
+#endif
+out:
+ return error;
+}
+
+/*
+ * 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, struct ide_cmd *cmd)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ struct dbdma_cmd *table;
+ volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+ struct scatterlist *sg;
+ int wr = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
+ int i = cmd->sg_nents, count = 0;
+
+ /* 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);
+
+ /* 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;
+ }
+ return 0;
+ }
+ 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;
+ }
+ table->command = cpu_to_le16(wr? OUTPUT_MORE: INPUT_MORE);
+ table->req_count = cpu_to_le16(tc);
+ table->phy_addr = cpu_to_le32(cur_addr);
+ table->cmd_dep = 0;
+ table->xfer_status = 0;
+ table->res_count = 0;
+ cur_addr += tc;
+ cur_len -= tc;
+ ++table;
+ }
+ sg = sg_next(sg);
+ i--;
+ }
+
+ /* convert the last command to an input/output last command */
+ if (count) {
+ table[-1].command = cpu_to_le16(wr? OUTPUT_LAST: INPUT_LAST);
+ /* add the stop command to the end of the list */
+ memset(table, 0, sizeof(struct dbdma_cmd));
+ table->command = cpu_to_le16(DBDMA_STOP);
+ mb();
+ writel(hwif->dmatable_dma, &dma->cmdptr);
+ return 1;
+ }
+
+ printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
+
+ return 0; /* revert to PIO for this request */
+}
+
+/*
+ * 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_ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ u8 unit = drive->dn & 1, ata4 = (pmif->kind == controller_kl_ata4);
+ u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
+
+ if (pmac_ide_build_dmatable(drive, cmd) == 0)
+ return 1;
+
+ /* Apple adds 60ns to wrDataSetup on reads */
+ if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
+ writel(pmif->timings[unit] + (write ? 0 : 0x00800000UL),
+ PMAC_IDE_REG(IDE_TIMING_CONFIG));
+ (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
+ }
+
+ return 0;
+}
+
+/*
+ * Kick the DMA controller into life after the DMA command has been issued
+ * to the drive.
+ */
+static void
+pmac_ide_dma_start(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ 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_ide_dma_end (ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+ u32 dstat;
+
+ dstat = readl(&dma->status);
+ writel(((RUN|WAKE|DEAD) << 16), &dma->control);
+
+ /* 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_ide_dma_test_irq (ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+ unsigned long status, timeout;
+
+ /* 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 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->index);
+ break;
+ }
+ }
+ return 1;
+}
+
+static void pmac_ide_dma_host_set(ide_drive_t *drive, int on)
+{
+}
+
+static void
+pmac_ide_dma_lost_irq (ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+ unsigned long status = readl(&dma->status);
+
+ printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
+}
+
+static const struct ide_dma_ops pmac_dma_ops = {
+ .dma_host_set = pmac_ide_dma_host_set,
+ .dma_setup = pmac_ide_dma_setup,
+ .dma_start = pmac_ide_dma_start,
+ .dma_end = pmac_ide_dma_end,
+ .dma_test_irq = pmac_ide_dma_test_irq,
+ .dma_lost_irq = pmac_ide_dma_lost_irq,
+};
+
+/*
+ * Allocate the data structures needed for using DMA with an interface
+ * and fill the proper list of functions pointers
+ */
+static int pmac_ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+ pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+ struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+ /* We won't need pci_dev if we switch to generic consistent
+ * DMA routines ...
+ */
+ if (dev == NULL || pmif->dma_regs == 0)
+ return -ENODEV;
+ /*
+ * 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 = dma_alloc_coherent(&dev->dev,
+ (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
+ &hwif->dmatable_dma, GFP_KERNEL);
+ if (pmif->dma_table_cpu == NULL) {
+ printk(KERN_ERR "%s: unable to allocate DMA command list\n",
+ hwif->name);
+ return -ENOMEM;
+ }
+
+ hwif->sg_max_nents = MAX_DCMDS;
+
+ return 0;
+}
+
+module_init(pmac_ide_probe);
+
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff