Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1708 insertions, 0 deletions

diff --git a/kernel/drivers/ide/pmac.c b/kernel/drivers/ide/pmac.c
new file mode 100644
index 000000000..96a345248
--- /dev/null
+++ b/kernel/drivers/ide/pmac.c
@@ -0,0 +1,1708 @@
+/*
+ * 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");