Merge commit 'v2.6.29' into core/header-fixes

28 files changed, 963 insertions, 69 deletions

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index b1c6f68d98ce..5ea3bfad172a 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -46,7 +46,7 @@ menuconfig IDE
           SMART parameters from disk drives.
 
           To compile this driver as a module, choose M here: the
-          module will be called ide.
+          module will be called ide-core.ko.
 
           For further information, please read <file:Documentation/ide/ide.txt>.
 
@@ -465,6 +465,16 @@ config BLK_DEV_CS5535
 
           It is safe to say Y to this question.
 
+config BLK_DEV_CS5536
+        tristate "CS5536 chipset support"
+        depends on X86_32
+        select BLK_DEV_IDEDMA_PCI
+        help
+          This option enables support for the AMD CS5536
+          companion chip used with the Geode LX processor family.
+
+          If unsure, say N.
+
 config BLK_DEV_HPT366
         tristate "HPT36X/37X chipset support"
         select BLK_DEV_IDEDMA_PCI
@@ -711,6 +721,11 @@ config BLK_DEV_IDE_TX4939
         depends on SOC_TX4939
         select BLK_DEV_IDEDMA_SFF
 
+config BLK_DEV_IDE_AT91
+        tristate "Atmel AT91 (SAM9, CAP9, AT572D940HF) IDE support"
+        depends on ARM && ARCH_AT91 && !ARCH_AT91RM9200 && !ARCH_AT91X40
+        select IDE_TIMINGS
+
 config IDE_ARM
         tristate "ARM IDE support"
         depends on ARM && (ARCH_RPC || ARCH_SHARK)
diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile
index c2b9c93f0095..1c326d94aa6d 100644
--- a/drivers/ide/Makefile
+++ b/drivers/ide/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_BLK_DEV_CMD64X)		+= cmd64x.o
 obj-$(CONFIG_BLK_DEV_CS5520)            += cs5520.o
 obj-$(CONFIG_BLK_DEV_CS5530)            += cs5530.o
 obj-$(CONFIG_BLK_DEV_CS5535)            += cs5535.o
+obj-$(CONFIG_BLK_DEV_CS5536)            += cs5536.o
 obj-$(CONFIG_BLK_DEV_SC1200)            += sc1200.o
 obj-$(CONFIG_BLK_DEV_CY82C693)          += cy82c693.o
 obj-$(CONFIG_BLK_DEV_DELKIN)            += delkin_cb.o
@@ -115,3 +116,4 @@ obj-$(CONFIG_BLK_DEV_IDE_AU1XXX)	+= au1xxx-ide.o
 
 obj-$(CONFIG_BLK_DEV_IDE_TX4938)        += tx4938ide.o
 obj-$(CONFIG_BLK_DEV_IDE_TX4939)        += tx4939ide.o
+obj-$(CONFIG_BLK_DEV_IDE_AT91)          += at91_ide.o
diff --git a/drivers/ide/amd74xx.c b/drivers/ide/amd74xx.c
index 69660a431cd9..77267c859965 100644
--- a/drivers/ide/amd74xx.c
+++ b/drivers/ide/amd74xx.c
@@ -166,7 +166,7 @@ static unsigned int init_chipset_amd74xx(struct pci_dev *dev)
          * Check for broken FIFO support.
          */
         if (dev->vendor == PCI_VENDOR_ID_AMD &&
-            dev->vendor == PCI_DEVICE_ID_AMD_VIPER_7411)
+            dev->device == PCI_DEVICE_ID_AMD_VIPER_7411)
                 t &= 0x0f;
         else
                 t |= 0xf0;
diff --git a/drivers/ide/at91_ide.c b/drivers/ide/at91_ide.c
new file mode 100644
index 000000000000..1bb50f46388d
--- /dev/null
+++ b/drivers/ide/at91_ide.c
@@ -0,0 +1,467 @@
+/*
+ * IDE host driver for AT91 (SAM9, CAP9, AT572D940HF) Static Memory Controller
+ * with Compact Flash True IDE logic
+ *
+ * Copyright (c) 2008, 2009 Kelvatek Ltd.
+ *
+ *  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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/ide.h>
+#include <linux/platform_device.h>
+
+#include <mach/board.h>
+#include <mach/gpio.h>
+#include <mach/at91sam9263.h>
+#include <mach/at91sam9_smc.h>
+#include <mach/at91sam9263_matrix.h>
+
+#define DRV_NAME "at91_ide"
+
+#define perr(fmt, args...) pr_err(DRV_NAME ": " fmt, ##args)
+#define pdbg(fmt, args...) pr_debug("%s " fmt, __func__, ##args)
+
+/*
+ * Access to IDE device is possible through EBI Static Memory Controller
+ * with Compact Flash logic. For details see EBI and SMC datasheet sections
+ * of any microcontroller from AT91SAM9 family.
+ *
+ * Within SMC chip select address space, lines A[23:21] distinguish Compact
+ * Flash modes (I/O, common memory, attribute memory, True IDE). IDE modes are:
+ *   0x00c0000 - True IDE
+ *   0x00e0000 - Alternate True IDE (Alt Status Register)
+ *
+ * On True IDE mode Task File and Data Register are mapped at the same address.
+ * To distinguish access between these two different bus data width is used:
+ * 8Bit for Task File, 16Bit for Data I/O.
+ *
+ * After initialization we do 8/16 bit flipping (changes in SMC MODE register)
+ * only inside IDE callback routines which are serialized by IDE layer,
+ * so no additional locking needed.
+ */
+
+#define TASK_FILE       0x00c00000
+#define ALT_MODE        0x00e00000
+#define REGS_SIZE       8
+
+#define enter_16bit(cs, mode) do {                                      \
+        mode = at91_sys_read(AT91_SMC_MODE(cs));                        \
+        at91_sys_write(AT91_SMC_MODE(cs), mode | AT91_SMC_DBW_16);      \
+} while (0)
+
+#define leave_16bit(cs, mode) at91_sys_write(AT91_SMC_MODE(cs), mode);
+
+static void set_smc_timings(const u8 chipselect, const u16 cycle,
+                            const u16 setup, const u16 pulse,
+                            const u16 data_float, int use_iordy)
+{
+        unsigned long mode = AT91_SMC_READMODE | AT91_SMC_WRITEMODE |
+                             AT91_SMC_BAT_SELECT;
+
+        /* disable or enable waiting for IORDY signal */
+        if (use_iordy)
+                mode |= AT91_SMC_EXNWMODE_READY;
+
+        /* add data float cycles if needed */
+        if (data_float)
+                mode |= AT91_SMC_TDF_(data_float);
+
+        at91_sys_write(AT91_SMC_MODE(chipselect), mode);
+
+        /* setup timings in SMC */
+        at91_sys_write(AT91_SMC_SETUP(chipselect), AT91_SMC_NWESETUP_(setup) |
+                                                   AT91_SMC_NCS_WRSETUP_(0) |
+                                                   AT91_SMC_NRDSETUP_(setup) |
+                                                   AT91_SMC_NCS_RDSETUP_(0));
+        at91_sys_write(AT91_SMC_PULSE(chipselect), AT91_SMC_NWEPULSE_(pulse) |
+                                                   AT91_SMC_NCS_WRPULSE_(cycle) |
+                                                   AT91_SMC_NRDPULSE_(pulse) |
+                                                   AT91_SMC_NCS_RDPULSE_(cycle));
+        at91_sys_write(AT91_SMC_CYCLE(chipselect), AT91_SMC_NWECYCLE_(cycle) |
+                                                   AT91_SMC_NRDCYCLE_(cycle));
+}
+
+static unsigned int calc_mck_cycles(unsigned int ns, unsigned int mck_hz)
+{
+        u64 tmp = ns;
+
+        tmp *= mck_hz;
+        tmp += 1000*1000*1000 - 1; /* round up */
+        do_div(tmp, 1000*1000*1000);
+        return (unsigned int) tmp;
+}
+
+static void apply_timings(const u8 chipselect, const u8 pio,
+                          const struct ide_timing *timing, int use_iordy)
+{
+        unsigned int t0, t1, t2, t6z;
+        unsigned int cycle, setup, pulse, data_float;
+        unsigned int mck_hz;
+        struct clk *mck;
+
+        /* see table 22 of Compact Flash standard 4.1 for the meaning,
+         * we do not stretch active (t2) time, so setup (t1) + hold time (th)
+         * assure at least minimal recovery (t2i) time */
+        t0 = timing->cyc8b;
+        t1 = timing->setup;
+        t2 = timing->act8b;
+        t6z = (pio < 5) ? 30 : 20;
+
+        pdbg("t0=%u t1=%u t2=%u t6z=%u\n", t0, t1, t2, t6z);
+
+        mck = clk_get(NULL, "mck");
+        BUG_ON(IS_ERR(mck));
+        mck_hz = clk_get_rate(mck);
+        pdbg("mck_hz=%u\n", mck_hz);
+
+        cycle = calc_mck_cycles(t0, mck_hz);
+        setup = calc_mck_cycles(t1, mck_hz);
+        pulse = calc_mck_cycles(t2, mck_hz);
+        data_float = calc_mck_cycles(t6z, mck_hz);
+
+        pdbg("cycle=%u setup=%u pulse=%u data_float=%u\n",
+             cycle, setup, pulse, data_float);
+
+        set_smc_timings(chipselect, cycle, setup, pulse, data_float, use_iordy);
+}
+
+static void at91_ide_input_data(ide_drive_t *drive, struct request *rq,
+                                void *buf, unsigned int len)
+{
+        ide_hwif_t *hwif = drive->hwif;
+        struct ide_io_ports *io_ports = &hwif->io_ports;
+        u8 chipselect = hwif->select_data;
+        unsigned long mode;
+
+        pdbg("cs %u buf %p len %d\n", chipselect, buf, len);
+
+        len++;
+
+        enter_16bit(chipselect, mode);
+        __ide_mm_insw((void __iomem *) io_ports->data_addr, buf, len / 2);
+        leave_16bit(chipselect, mode);
+}
+
+static void at91_ide_output_data(ide_drive_t *drive, struct request *rq,
+                                 void *buf, unsigned int len)
+{
+        ide_hwif_t *hwif = drive->hwif;
+        struct ide_io_ports *io_ports = &hwif->io_ports;
+        u8 chipselect = hwif->select_data;
+        unsigned long mode;
+
+        pdbg("cs %u buf %p len %d\n", chipselect,  buf, len);
+
+        enter_16bit(chipselect, mode);
+        __ide_mm_outsw((void __iomem *) io_ports->data_addr, buf, len / 2);
+        leave_16bit(chipselect, mode);
+}
+
+static u8 ide_mm_inb(unsigned long port)
+{
+        return readb((void __iomem *) port);
+}
+
+static void ide_mm_outb(u8 value, unsigned long port)
+{
+        writeb(value, (void __iomem *) port);
+}
+
+static void at91_ide_tf_load(ide_drive_t *drive, ide_task_t *task)
+{
+        ide_hwif_t *hwif = drive->hwif;
+        struct ide_io_ports *io_ports = &hwif->io_ports;
+        struct ide_taskfile *tf = &task->tf;
+        u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
+
+        if (task->tf_flags & IDE_TFLAG_FLAGGED)
+                HIHI = 0xFF;
+
+        if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
+                u16 data = (tf->hob_data << 8) | tf->data;
+
+                at91_ide_output_data(drive, NULL, &data, 2);
+        }
+
+        if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
+                ide_mm_outb(tf->hob_feature, io_ports->feature_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
+                ide_mm_outb(tf->hob_nsect, io_ports->nsect_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
+                ide_mm_outb(tf->hob_lbal, io_ports->lbal_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
+                ide_mm_outb(tf->hob_lbam, io_ports->lbam_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
+                ide_mm_outb(tf->hob_lbah, io_ports->lbah_addr);
+
+        if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
+                ide_mm_outb(tf->feature, io_ports->feature_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
+                ide_mm_outb(tf->nsect, io_ports->nsect_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
+                ide_mm_outb(tf->lbal, io_ports->lbal_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
+                ide_mm_outb(tf->lbam, io_ports->lbam_addr);
+        if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
+                ide_mm_outb(tf->lbah, io_ports->lbah_addr);
+
+        if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
+                ide_mm_outb((tf->device & HIHI) | drive->select, io_ports->device_addr);
+}
+
+static void at91_ide_tf_read(ide_drive_t *drive, ide_task_t *task)
+{
+        ide_hwif_t *hwif = drive->hwif;
+        struct ide_io_ports *io_ports = &hwif->io_ports;
+        struct ide_taskfile *tf = &task->tf;
+
+        if (task->tf_flags & IDE_TFLAG_IN_DATA) {
+                u16 data;
+
+                at91_ide_input_data(drive, NULL, &data, 2);
+                tf->data = data & 0xff;
+                tf->hob_data = (data >> 8) & 0xff;
+        }
+
+        /* be sure we're looking at the low order bits */
+        ide_mm_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
+
+        if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
+                tf->feature = ide_mm_inb(io_ports->feature_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_NSECT)
+                tf->nsect  = ide_mm_inb(io_ports->nsect_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAL)
+                tf->lbal   = ide_mm_inb(io_ports->lbal_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAM)
+                tf->lbam   = ide_mm_inb(io_ports->lbam_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAH)
+                tf->lbah   = ide_mm_inb(io_ports->lbah_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
+                tf->device = ide_mm_inb(io_ports->device_addr);
+
+        if (task->tf_flags & IDE_TFLAG_LBA48) {
+                ide_mm_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
+
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
+                        tf->hob_feature = ide_mm_inb(io_ports->feature_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+                        tf->hob_nsect   = ide_mm_inb(io_ports->nsect_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+                        tf->hob_lbal    = ide_mm_inb(io_ports->lbal_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+                        tf->hob_lbam    = ide_mm_inb(io_ports->lbam_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+                        tf->hob_lbah    = ide_mm_inb(io_ports->lbah_addr);
+        }
+}
+
+static void at91_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
+{
+        struct ide_timing *timing;
+        u8 chipselect = drive->hwif->select_data;
+        int use_iordy = 0;
+
+        pdbg("chipselect %u pio %u\n", chipselect, pio);
+
+        timing = ide_timing_find_mode(XFER_PIO_0 + pio);
+        BUG_ON(!timing);
+
+        if ((pio > 2 || ata_id_has_iordy(drive->id)) &&
+            !(ata_id_is_cfa(drive->id) && pio > 4))
+                use_iordy = 1;
+
+        apply_timings(chipselect, pio, timing, use_iordy);
+}
+
+static const struct ide_tp_ops at91_ide_tp_ops = {
+        .exec_command   = ide_exec_command,
+        .read_status    = ide_read_status,
+        .read_altstatus = ide_read_altstatus,
+        .set_irq        = ide_set_irq,
+
+        .tf_load        = at91_ide_tf_load,
+        .tf_read        = at91_ide_tf_read,
+
+        .input_data     = at91_ide_input_data,
+        .output_data    = at91_ide_output_data,
+};
+
+static const struct ide_port_ops at91_ide_port_ops = {
+        .set_pio_mode   = at91_ide_set_pio_mode,
+};
+
+static const struct ide_port_info at91_ide_port_info __initdata = {
+        .port_ops       = &at91_ide_port_ops,
+        .tp_ops         = &at91_ide_tp_ops,
+        .host_flags     = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA | IDE_HFLAG_SINGLE |
+                          IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_UNMASK_IRQS,
+        .pio_mask       = ATA_PIO5,
+};
+
+/*
+ * If interrupt is delivered through GPIO, IRQ are triggered on falling
+ * and rising edge of signal. Whereas IDE device request interrupt on high
+ * level (rising edge in our case). This mean we have fake interrupts, so
+ * we need to check interrupt pin and exit instantly from ISR when line
+ * is on low level.
+ */
+
+irqreturn_t at91_irq_handler(int irq, void *dev_id)
+{
+        int ntries = 8;
+        int pin_val1, pin_val2;
+
+        /* additional deglitch, line can be noisy in badly designed PCB */
+        do {
+                pin_val1 = at91_get_gpio_value(irq);
+                pin_val2 = at91_get_gpio_value(irq);
+        } while (pin_val1 != pin_val2 && --ntries > 0);
+
+        if (pin_val1 == 0 || ntries <= 0)
+                return IRQ_HANDLED;
+
+        return ide_intr(irq, dev_id);
+}
+
+static int __init at91_ide_probe(struct platform_device *pdev)
+{
+        int ret;
+        hw_regs_t hw;
+        hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
+        struct ide_host *host;
+        struct resource *res;
+        unsigned long tf_base = 0, ctl_base = 0;
+        struct at91_cf_data *board = pdev->dev.platform_data;
+
+        if (!board)
+                return -ENODEV;
+
+        if (board->det_pin && at91_get_gpio_value(board->det_pin) != 0) {
+                perr("no device detected\n");
+                return -ENODEV;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                perr("can't get memory resource\n");
+                return -ENODEV;
+        }
+
+        if (!devm_request_mem_region(&pdev->dev, res->start + TASK_FILE,
+                                     REGS_SIZE, "ide") ||
+            !devm_request_mem_region(&pdev->dev, res->start + ALT_MODE,
+                                     REGS_SIZE, "alt")) {
+                perr("memory resources in use\n");
+                return -EBUSY;
+        }
+
+        pdbg("chipselect %u irq %u res %08lx\n", board->chipselect,
+             board->irq_pin, (unsigned long) res->start);
+
+        tf_base = (unsigned long) devm_ioremap(&pdev->dev, res->start + TASK_FILE,
+                                               REGS_SIZE);
+        ctl_base = (unsigned long) devm_ioremap(&pdev->dev, res->start + ALT_MODE,
+                                                REGS_SIZE);
+        if (!tf_base || !ctl_base) {
+                perr("can't map memory regions\n");
+                return -EBUSY;
+        }
+
+        memset(&hw, 0, sizeof(hw));
+
+        if (board->flags & AT91_IDE_SWAP_A0_A2) {
+                /* workaround for stupid hardware bug */
+                hw.io_ports.data_addr   = tf_base + 0;
+                hw.io_ports.error_addr  = tf_base + 4;
+                hw.io_ports.nsect_addr  = tf_base + 2;
+                hw.io_ports.lbal_addr   = tf_base + 6;
+                hw.io_ports.lbam_addr   = tf_base + 1;
+                hw.io_ports.lbah_addr   = tf_base + 5;
+                hw.io_ports.device_addr = tf_base + 3;
+                hw.io_ports.command_addr = tf_base + 7;
+                hw.io_ports.ctl_addr    = ctl_base + 3;
+        } else
+                ide_std_init_ports(&hw, tf_base, ctl_base + 6);
+
+        hw.irq = board->irq_pin;
+        hw.chipset = ide_generic;
+        hw.dev = &pdev->dev;
+
+        host = ide_host_alloc(&at91_ide_port_info, hws);
+        if (!host) {
+                perr("failed to allocate ide host\n");
+                return -ENOMEM;
+        }
+
+        /* setup Static Memory Controller - PIO 0 as default */
+        apply_timings(board->chipselect, 0, ide_timing_find_mode(XFER_PIO_0), 0);
+
+        /* with GPIO interrupt we have to do quirks in handler */
+        if (board->irq_pin >= PIN_BASE)
+                host->irq_handler = at91_irq_handler;
+
+        host->ports[0]->select_data = board->chipselect;
+
+        ret = ide_host_register(host, &at91_ide_port_info, hws);
+        if (ret) {
+                perr("failed to register ide host\n");
+                goto err_free_host;
+        }
+        platform_set_drvdata(pdev, host);
+        return 0;
+
+err_free_host:
+        ide_host_free(host);
+        return ret;
+}
+
+static int __exit at91_ide_remove(struct platform_device *pdev)
+{
+        struct ide_host *host = platform_get_drvdata(pdev);
+
+        ide_host_remove(host);
+        return 0;
+}
+
+static struct platform_driver at91_ide_driver = {
+        .driver = {
+                .name = DRV_NAME,
+                .owner = THIS_MODULE,
+        },
+        .remove = __exit_p(at91_ide_remove),
+};
+
+static int __init at91_ide_init(void)
+{
+        return platform_driver_probe(&at91_ide_driver, at91_ide_probe);
+}
+
+static void __exit at91_ide_exit(void)
+{
+        platform_driver_unregister(&at91_ide_driver);
+}
+
+module_init(at91_ide_init);
+module_exit(at91_ide_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Stanislaw Gruszka <stf_xl@wp.pl>");
+
diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c
index b2735d28f5cc..ecd1e62ca91a 100644
--- a/drivers/ide/atiixp.c
+++ b/drivers/ide/atiixp.c
@@ -52,7 +52,7 @@ static void atiixp_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
         struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
         unsigned long flags;
-        int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
+        int timing_shift = (drive->dn ^ 1) * 8;
         u32 pio_timing_data;
         u16 pio_mode_data;
 
@@ -85,7 +85,7 @@ static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
 {
         struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
         unsigned long flags;
-        int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
+        int timing_shift = (drive->dn ^ 1) * 8;
         u32 tmp32;
         u16 tmp16;
         u16 udma_ctl = 0;
diff --git a/drivers/ide/cs5536.c b/drivers/ide/cs5536.c
new file mode 100644
index 000000000000..7a62db719a46
--- /dev/null
+++ b/drivers/ide/cs5536.c
@@ -0,0 +1,308 @@
+/*
+ * CS5536 PATA support
+ * (C) 2007 Martin K. Petersen <mkp@mkp.net>
+ * (C) 2009 Bartlomiej Zolnierkiewicz
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Documentation:
+ *      Available from AMD web site.
+ *
+ * The IDE timing registers for the CS5536 live in the Geode Machine
+ * Specific Register file and not PCI config space.  Most BIOSes
+ * virtualize the PCI registers so the chip looks like a standard IDE
+ * controller.  Unfortunately not all implementations get this right.
+ * In particular some have problems with unaligned accesses to the
+ * virtualized PCI registers.  This driver always does full dword
+ * writes to work around the issue.  Also, in case of a bad BIOS this
+ * driver can be loaded with the "msr=1" parameter which forces using
+ * the Machine Specific Registers to configure the device.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+#include <asm/msr.h>
+
+#define DRV_NAME        "cs5536"
+
+enum {
+        MSR_IDE_CFG             = 0x51300010,
+        PCI_IDE_CFG             = 0x40,
+
+        CFG                     = 0,
+        DTC                     = 2,
+        CAST                    = 3,
+        ETC                     = 4,
+
+        IDE_CFG_CHANEN          = (1 << 1),
+        IDE_CFG_CABLE           = (1 << 17) | (1 << 16),
+
+        IDE_D0_SHIFT            = 24,
+        IDE_D1_SHIFT            = 16,
+        IDE_DRV_MASK            = 0xff,
+
+        IDE_CAST_D0_SHIFT       = 6,
+        IDE_CAST_D1_SHIFT       = 4,
+        IDE_CAST_DRV_MASK       = 0x3,
+
+        IDE_CAST_CMD_SHIFT      = 24,
+        IDE_CAST_CMD_MASK       = 0xff,
+
+        IDE_ETC_UDMA_MASK       = 0xc0,
+};
+
+static int use_msr;
+
+static int cs5536_read(struct pci_dev *pdev, int reg, u32 *val)
+{
+        if (unlikely(use_msr)) {
+                u32 dummy;
+
+                rdmsr(MSR_IDE_CFG + reg, *val, dummy);
+                return 0;
+        }
+
+        return pci_read_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
+}
+
+static int cs5536_write(struct pci_dev *pdev, int reg, int val)
+{
+        if (unlikely(use_msr)) {
+                wrmsr(MSR_IDE_CFG + reg, val, 0);
+                return 0;
+        }
+
+        return pci_write_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
+}
+
+static void cs5536_program_dtc(ide_drive_t *drive, u8 tim)
+{
+        struct pci_dev *pdev = to_pci_dev(drive->hwif->dev);
+        int dshift = (drive->dn & 1) ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+        u32 dtc;
+
+        cs5536_read(pdev, DTC, &dtc);
+        dtc &= ~(IDE_DRV_MASK << dshift);
+        dtc |= tim << dshift;
+        cs5536_write(pdev, DTC, dtc);
+}
+
+/**
+ *      cs5536_cable_detect     -       detect cable type
+ *      @hwif: Port to detect on
+ *
+ *      Perform cable detection for ATA66 capable cable.
+ *
+ *      Returns a cable type.
+ */
+
+static u8 cs5536_cable_detect(ide_hwif_t *hwif)
+{
+        struct pci_dev *pdev = to_pci_dev(hwif->dev);
+        u32 cfg;
+
+        cs5536_read(pdev, CFG, &cfg);
+
+        if (cfg & IDE_CFG_CABLE)
+                return ATA_CBL_PATA80;
+        else
+                return ATA_CBL_PATA40;
+}
+
+/**
+ *      cs5536_set_pio_mode             -       PIO timing setup
+ *      @drive: ATA device
+ *      @pio: PIO mode number
+ */
+
+static void cs5536_set_pio_mode(ide_drive_t *drive, const u8 pio)
+{
+        static const u8 drv_timings[5] = {
+                0x98, 0x55, 0x32, 0x21, 0x20,
+        };
+
+        static const u8 addr_timings[5] = {
+                0x2, 0x1, 0x0, 0x0, 0x0,
+        };
+
+        static const u8 cmd_timings[5] = {
+                0x99, 0x92, 0x90, 0x22, 0x20,
+        };
+
+        struct pci_dev *pdev = to_pci_dev(drive->hwif->dev);
+        ide_drive_t *pair = ide_get_pair_dev(drive);
+        int cshift = (drive->dn & 1) ? IDE_CAST_D1_SHIFT : IDE_CAST_D0_SHIFT;
+        u32 cast;
+        u8 cmd_pio = pio;
+
+        if (pair)
+                cmd_pio = min(pio, ide_get_best_pio_mode(pair, 255, 4));
+
+        drive->drive_data &= (IDE_DRV_MASK << 8);
+        drive->drive_data |= drv_timings[pio];
+
+        cs5536_program_dtc(drive, drv_timings[pio]);
+
+        cs5536_read(pdev, CAST, &cast);
+
+        cast &= ~(IDE_CAST_DRV_MASK << cshift);
+        cast |= addr_timings[pio] << cshift;
+
+        cast &= ~(IDE_CAST_CMD_MASK << IDE_CAST_CMD_SHIFT);
+        cast |= cmd_timings[cmd_pio] << IDE_CAST_CMD_SHIFT;
+
+        cs5536_write(pdev, CAST, cast);
+}
+
+/**
+ *      cs5536_set_dma_mode             -       DMA timing setup
+ *      @drive: ATA device
+ *      @mode: DMA mode
+ */
+
+static void cs5536_set_dma_mode(ide_drive_t *drive, const u8 mode)
+{
+        static const u8 udma_timings[6] = {
+                0xc2, 0xc1, 0xc0, 0xc4, 0xc5, 0xc6,
+        };
+
+        static const u8 mwdma_timings[3] = {
+                0x67, 0x21, 0x20,
+        };
+
+        struct pci_dev *pdev = to_pci_dev(drive->hwif->dev);
+        int dshift = (drive->dn & 1) ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+        u32 etc;
+
+        cs5536_read(pdev, ETC, &etc);
+
+        if (mode >= XFER_UDMA_0) {
+                etc &= ~(IDE_DRV_MASK << dshift);
+                etc |= udma_timings[mode - XFER_UDMA_0] << dshift;
+        } else { /* MWDMA */
+                etc &= ~(IDE_ETC_UDMA_MASK << dshift);
+                drive->drive_data &= IDE_DRV_MASK;
+                drive->drive_data |= mwdma_timings[mode - XFER_MW_DMA_0] << 8;
+        }
+
+        cs5536_write(pdev, ETC, etc);
+}
+
+static void cs5536_dma_start(ide_drive_t *drive)
+{
+        if (drive->current_speed < XFER_UDMA_0 &&
+            (drive->drive_data >> 8) != (drive->drive_data & IDE_DRV_MASK))
+                cs5536_program_dtc(drive, drive->drive_data >> 8);
+
+        ide_dma_start(drive);
+}
+
+static int cs5536_dma_end(ide_drive_t *drive)
+{
+        int ret = ide_dma_end(drive);
+
+        if (drive->current_speed < XFER_UDMA_0 &&
+            (drive->drive_data >> 8) != (drive->drive_data & IDE_DRV_MASK))
+                cs5536_program_dtc(drive, drive->drive_data & IDE_DRV_MASK);
+
+        return ret;
+}
+
+static const struct ide_port_ops cs5536_port_ops = {
+        .set_pio_mode           = cs5536_set_pio_mode,
+        .set_dma_mode           = cs5536_set_dma_mode,
+        .cable_detect           = cs5536_cable_detect,
+};
+
+static const struct ide_dma_ops cs5536_dma_ops = {
+        .dma_host_set           = ide_dma_host_set,
+        .dma_setup              = ide_dma_setup,
+        .dma_exec_cmd           = ide_dma_exec_cmd,
+        .dma_start              = cs5536_dma_start,
+        .dma_end                = cs5536_dma_end,
+        .dma_test_irq           = ide_dma_test_irq,
+        .dma_lost_irq           = ide_dma_lost_irq,
+        .dma_timeout            = ide_dma_timeout,
+};
+
+static const struct ide_port_info cs5536_info = {
+        .name           = DRV_NAME,
+        .port_ops       = &cs5536_port_ops,
+        .dma_ops        = &cs5536_dma_ops,
+        .host_flags     = IDE_HFLAG_SINGLE,
+        .pio_mask       = ATA_PIO4,
+        .mwdma_mask     = ATA_MWDMA2,
+        .udma_mask      = ATA_UDMA5,
+};
+
+/**
+ *      cs5536_init_one
+ *      @dev: PCI device
+ *      @id: Entry in match table
+ */
+
+static int cs5536_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        u32 cfg;
+
+        if (use_msr)
+                printk(KERN_INFO DRV_NAME ": Using MSR regs instead of PCI\n");
+
+        cs5536_read(dev, CFG, &cfg);
+
+        if ((cfg & IDE_CFG_CHANEN) == 0) {
+                printk(KERN_ERR DRV_NAME ": disabled by BIOS\n");
+                return -ENODEV;
+        }
+
+        return ide_pci_init_one(dev, &cs5536_info, NULL);
+}
+
+static const struct pci_device_id cs5536_pci_tbl[] = {
+        { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5536_IDE), },
+        { },
+};
+
+static struct pci_driver cs5536_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = cs5536_pci_tbl,
+        .probe          = cs5536_init_one,
+        .remove         = ide_pci_remove,
+        .suspend        = ide_pci_suspend,
+        .resume         = ide_pci_resume,
+};
+
+static int __init cs5536_init(void)
+{
+        return pci_register_driver(&cs5536_pci_driver);
+}
+
+static void __exit cs5536_exit(void)
+{
+        pci_unregister_driver(&cs5536_pci_driver);
+}
+
+MODULE_AUTHOR("Martin K. Petersen, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("low-level driver for the CS5536 IDE controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, cs5536_pci_tbl);
+
+module_param_named(msr, use_msr, int, 0644);
+MODULE_PARM_DESC(msr, "Force using MSR to configure IDE function (Default: 0)");
+
+module_init(cs5536_init);
+module_exit(cs5536_exit);
diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
index 97a35c667aee..415d7e24f2b6 100644
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -534,7 +534,7 @@ icside_register_v6(struct icside_state *state, struct expansion_card *ec)
                 d.dma_ops = NULL;
         }
 
-        ret = ide_host_register(host, NULL, hws);
+        ret = ide_host_register(host, &d, hws);
         if (ret)
                 goto err_free;
 
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c
index d8f295bdad76..ec7d07fa570a 100644
--- a/drivers/ide/ide-acpi.c
+++ b/drivers/ide/ide-acpi.c
@@ -282,7 +282,7 @@ static int do_drive_get_GTF(ide_drive_t *drive,
         port = hwif->channel ? drive->dn - 2: drive->dn;
 
         DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n",
-                 hwif->name, dev->bus_id, port, hwif->channel);
+                 hwif->name, dev_name(dev), port, hwif->channel);
 
         if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) {
                 DEBPRINT("%s drive %d:%d not present\n",
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index e96c01260598..e9d042dba0e0 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -140,6 +140,12 @@ static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
         rq->cmd_flags |= REQ_PREEMPT;
         rq->buffer = (char *)pc;
         rq->rq_disk = disk;
+
+        if (pc->req_xfer) {
+                rq->data = pc->buf;
+                rq->data_len = pc->req_xfer;
+        }
+
         memcpy(rq->cmd, pc->c, 12);
         if (drive->media == ide_tape)
                 rq->cmd[13] = REQ_IDETAPE_PC1;
@@ -159,6 +165,12 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
         rq->cmd_type = REQ_TYPE_SPECIAL;
         rq->buffer = (char *)pc;
+
+        if (pc->req_xfer) {
+                rq->data = pc->buf;
+                rq->data_len = pc->req_xfer;
+        }
+
         memcpy(rq->cmd, pc->c, 12);
         if (drive->media == ide_tape)
                 rq->cmd[13] = REQ_IDETAPE_PC1;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index cae69372cf45..ddfbea41d296 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -55,7 +55,7 @@
 
 static DEFINE_MUTEX(idecd_ref_mutex);
 
-static void ide_cd_release(struct kref *);
+static void ide_cd_release(struct device *);
 
 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
 {
@@ -67,7 +67,7 @@ static struct cdrom_info *ide_cd_get(struct gendisk *disk)
                 if (ide_device_get(cd->drive))
                         cd = NULL;
                 else
-                        kref_get(&cd->kref);
+                        get_device(&cd->dev);
 
         }
         mutex_unlock(&idecd_ref_mutex);
@@ -79,7 +79,7 @@ static void ide_cd_put(struct cdrom_info *cd)
         ide_drive_t *drive = cd->drive;
 
         mutex_lock(&idecd_ref_mutex);
-        kref_put(&cd->kref, ide_cd_release);
+        put_device(&cd->dev);
         ide_device_put(drive);
         mutex_unlock(&idecd_ref_mutex);
 }
@@ -194,6 +194,14 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
                         sector &= ~(bio_sectors - 1);
 
+                        /*
+                         * The SCSI specification allows for the value
+                         * returned by READ CAPACITY to be up to 75 2K
+                         * sectors past the last readable block.
+                         * Therefore, if we hit a medium error within the
+                         * last 75 2K sectors, we decrease the saved size
+                         * value.
+                         */
                         if (sector < get_capacity(info->disk) &&
                             drive->probed_capacity - sector < 4 * 75)
                                 set_capacity(info->disk, sector);
@@ -787,6 +795,9 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
                 if (blk_fs_request(rq)) {
                         ide_end_request(drive, 1, rq->nr_sectors);
                         return ide_stopped;
+                } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
+                        ide_end_request(drive, 1, 1);
+                        return ide_stopped;
                 }
                 goto end_request;
         }
@@ -1787,15 +1798,17 @@ static void ide_cd_remove(ide_drive_t *drive)
         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 
         ide_proc_unregister_driver(drive, info->driver);
-
+        device_del(&info->dev);
         del_gendisk(info->disk);
 
-        ide_cd_put(info);
+        mutex_lock(&idecd_ref_mutex);
+        put_device(&info->dev);
+        mutex_unlock(&idecd_ref_mutex);
 }
 
-static void ide_cd_release(struct kref *kref)
+static void ide_cd_release(struct device *dev)
 {
-        struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
+        struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
         struct cdrom_device_info *devinfo = &info->devinfo;
         ide_drive_t *drive = info->drive;
         struct gendisk *g = info->disk;
@@ -1994,7 +2007,12 @@ static int ide_cd_probe(ide_drive_t *drive)
 
         ide_init_disk(g, drive);
 
-        kref_init(&info->kref);
+        info->dev.parent = &drive->gendev;
+        info->dev.release = ide_cd_release;
+        dev_set_name(&info->dev, dev_name(&drive->gendev));
+
+        if (device_register(&info->dev))
+                goto out_free_disk;
 
         info->drive = drive;
         info->driver = &ide_cdrom_driver;
@@ -2008,7 +2026,7 @@ static int ide_cd_probe(ide_drive_t *drive)
         g->driverfs_dev = &drive->gendev;
         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
         if (ide_cdrom_setup(drive)) {
-                ide_cd_release(&info->kref);
+                put_device(&info->dev);
                 goto failed;
         }
 
@@ -2018,6 +2036,8 @@ static int ide_cd_probe(ide_drive_t *drive)
         add_disk(g);
         return 0;
 
+out_free_disk:
+        put_disk(g);
 out_free_cd:
         kfree(info);
 failed:
diff --git a/drivers/ide/ide-cd.h b/drivers/ide/ide-cd.h
index ac40d6cb90a2..c878bfcf1116 100644
--- a/drivers/ide/ide-cd.h
+++ b/drivers/ide/ide-cd.h
@@ -80,7 +80,7 @@ struct cdrom_info {
         ide_drive_t             *drive;
         struct ide_driver       *driver;
         struct gendisk          *disk;
-        struct kref             kref;
+        struct device           dev;
 
         /* Buffer for table of contents.  NULL if we haven't allocated
            a TOC buffer for this device yet. */
diff --git a/drivers/ide/ide-disk_proc.c b/drivers/ide/ide-disk_proc.c
index 1146f4204c6e..1f86dcbd2b1c 100644
--- a/drivers/ide/ide-disk_proc.c
+++ b/drivers/ide/ide-disk_proc.c
@@ -125,5 +125,5 @@ const struct ide_proc_devset ide_disk_settings[] = {
         IDE_PROC_DEVSET(multcount,      0,    16),
         IDE_PROC_DEVSET(nowerr,         0,     1),
         IDE_PROC_DEVSET(wcache,         0,     1),
-        { 0 },
+        { NULL },
 };
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 72ebab0bc755..059c90bb5ad2 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -128,6 +128,7 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 {
         ide_hwif_t *hwif = drive->hwif;
         struct scatterlist *sg = hwif->sg_table;
+        int i;
 
         ide_map_sg(drive, rq);
 
@@ -136,8 +137,13 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
         else
                 hwif->sg_dma_direction = DMA_TO_DEVICE;
 
-        return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
-                          hwif->sg_dma_direction);
+        i = dma_map_sg(hwif->dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
+        if (i) {
+                hwif->orig_sg_nents = hwif->sg_nents;
+                hwif->sg_nents = i;
+        }
+
+        return i;
 }
 EXPORT_SYMBOL_GPL(ide_build_sglist);
 
@@ -156,7 +162,7 @@ void ide_destroy_dmatable(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;
 
-        dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
+        dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->orig_sg_nents,
                      hwif->sg_dma_direction);
 }
 EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 3eab1c6c9b31..317ec62c33d4 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -327,8 +327,10 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
                 return ide_stopped;
         }
 
-        ide_init_sg_cmd(drive, rq);
-        ide_map_sg(drive, rq);
+        if (blk_fs_request(rq) || pc->req_xfer) {
+                ide_init_sg_cmd(drive, rq);
+                ide_map_sg(drive, rq);
+        }
 
         pc->sg = hwif->sg_table;
         pc->sg_cnt = hwif->sg_nents;
diff --git a/drivers/ide/ide-floppy_proc.c b/drivers/ide/ide-floppy_proc.c
index 3ec762cb60ab..fcd4d8153df5 100644
--- a/drivers/ide/ide-floppy_proc.c
+++ b/drivers/ide/ide-floppy_proc.c
@@ -29,5 +29,5 @@ const struct ide_proc_devset ide_floppy_settings[] = {
         IDE_PROC_DEVSET(bios_head, 0,  255),
         IDE_PROC_DEVSET(bios_sect, 0,   63),
         IDE_PROC_DEVSET(ticks,     0,  255),
-        { 0 },
+        { NULL },
 };
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 7857b209c6df..047109419902 100644
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -25,7 +25,7 @@ module_param(debug_mask, ulong, 0644);
 
 static DEFINE_MUTEX(ide_disk_ref_mutex);
 
-static void ide_disk_release(struct kref *);
+static void ide_disk_release(struct device *);
 
 static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
 {
@@ -37,7 +37,7 @@ static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
                 if (ide_device_get(idkp->drive))
                         idkp = NULL;
                 else
-                        kref_get(&idkp->kref);
+                        get_device(&idkp->dev);
         }
         mutex_unlock(&ide_disk_ref_mutex);
         return idkp;
@@ -48,7 +48,7 @@ static void ide_disk_put(struct ide_disk_obj *idkp)
         ide_drive_t *drive = idkp->drive;
 
         mutex_lock(&ide_disk_ref_mutex);
-        kref_put(&idkp->kref, ide_disk_release);
+        put_device(&idkp->dev);
         ide_device_put(drive);
         mutex_unlock(&ide_disk_ref_mutex);
 }
@@ -66,17 +66,18 @@ static void ide_gd_remove(ide_drive_t *drive)
         struct gendisk *g = idkp->disk;
 
         ide_proc_unregister_driver(drive, idkp->driver);
-
+        device_del(&idkp->dev);
         del_gendisk(g);
-
         drive->disk_ops->flush(drive);
 
-        ide_disk_put(idkp);
+        mutex_lock(&ide_disk_ref_mutex);
+        put_device(&idkp->dev);
+        mutex_unlock(&ide_disk_ref_mutex);
 }
 
-static void ide_disk_release(struct kref *kref)
+static void ide_disk_release(struct device *dev)
 {
-        struct ide_disk_obj *idkp = to_ide_drv(kref, ide_disk_obj);
+        struct ide_disk_obj *idkp = to_ide_drv(dev, ide_disk_obj);
         ide_drive_t *drive = idkp->drive;
         struct gendisk *g = idkp->disk;
 
@@ -348,7 +349,12 @@ static int ide_gd_probe(ide_drive_t *drive)
 
         ide_init_disk(g, drive);
 
-        kref_init(&idkp->kref);
+        idkp->dev.parent = &drive->gendev;
+        idkp->dev.release = ide_disk_release;
+        dev_set_name(&idkp->dev, dev_name(&drive->gendev));
+
+        if (device_register(&idkp->dev))
+                goto out_free_disk;
 
         idkp->drive = drive;
         idkp->driver = &ide_gd_driver;
@@ -373,6 +379,8 @@ static int ide_gd_probe(ide_drive_t *drive)
         add_disk(g);
         return 0;
 
+out_free_disk:
+        put_disk(g);
 out_free_idkp:
         kfree(idkp);
 failed:
diff --git a/drivers/ide/ide-gd.h b/drivers/ide/ide-gd.h
index a86779f0756b..b604bdd318a1 100644
--- a/drivers/ide/ide-gd.h
+++ b/drivers/ide/ide-gd.h
@@ -17,7 +17,7 @@ struct ide_disk_obj {
         ide_drive_t             *drive;
         struct ide_driver       *driver;
         struct gendisk          *disk;
-        struct kref             kref;
+        struct device           dev;
         unsigned int            openers;        /* protected by BKL for now */
 
         /* Last failed packet command */
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index cc163319dfbd..a9a6c208288a 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -418,11 +418,14 @@ void ide_map_sg(ide_drive_t *drive, struct request *rq)
         ide_hwif_t *hwif = drive->hwif;
         struct scatterlist *sg = hwif->sg_table;
 
-        if (rq->cmd_type != REQ_TYPE_ATA_TASKFILE) {
-                hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
-        } else {
+        if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
                 sg_init_one(sg, rq->buffer, rq->nr_sectors * SECTOR_SIZE);
                 hwif->sg_nents = 1;
+        } else if (!rq->bio) {
+                sg_init_one(sg, rq->data, rq->data_len);
+                hwif->sg_nents = 1;
+        } else {
+                hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
         }
 }
 
@@ -905,7 +908,7 @@ void ide_timer_expiry (unsigned long data)
         ide_drive_t     *uninitialized_var(drive);
         ide_handler_t   *handler;
         unsigned long   flags;
-        unsigned long   wait = -1;
+        int             wait = -1;
         int             plug_device = 0;
 
         spin_lock_irqsave(&hwif->lock, flags);
@@ -1159,6 +1162,7 @@ out_early:
 
         return irq_ret;
 }
+EXPORT_SYMBOL_GPL(ide_intr);
 
 /**
  *      ide_do_drive_cmd        -       issue IDE special command
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 753b92ebe0ae..b1892bd95c6f 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -315,6 +315,8 @@ void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
         u8 io_32bit = drive->io_32bit;
         u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
 
+        len++;
+
         if (io_32bit) {
                 unsigned long uninitialized_var(flags);
 
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 0db1ed9f5fc2..ee8e3e7cad51 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -950,6 +950,7 @@ static int ide_port_setup_devices(ide_hwif_t *hwif)
 static int init_irq (ide_hwif_t *hwif)
 {
         struct ide_io_ports *io_ports = &hwif->io_ports;
+        irq_handler_t irq_handler;
         int sa = 0;
 
         mutex_lock(&ide_cfg_mtx);
@@ -959,6 +960,10 @@ static int init_irq (ide_hwif_t *hwif)
         hwif->timer.function = &ide_timer_expiry;
         hwif->timer.data = (unsigned long)hwif;
 
+        irq_handler = hwif->host->irq_handler;
+        if (irq_handler == NULL)
+                irq_handler = ide_intr;
+
 #if defined(__mc68000__)
         sa = IRQF_SHARED;
 #endif /* __mc68000__ */
@@ -969,7 +974,7 @@ static int init_irq (ide_hwif_t *hwif)
         if (io_ports->ctl_addr)
                 hwif->tp_ops->set_irq(hwif, 1);
 
-        if (request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwif))
+        if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
                 goto out_up;
 
         if (!hwif->rqsize) {
@@ -1467,6 +1472,30 @@ struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
 }
 EXPORT_SYMBOL_GPL(ide_host_alloc);
 
+static void ide_port_free(ide_hwif_t *hwif)
+{
+        ide_port_free_devices(hwif);
+        ide_free_port_slot(hwif->index);
+        kfree(hwif);
+}
+
+static void ide_disable_port(ide_hwif_t *hwif)
+{
+        struct ide_host *host = hwif->host;
+        int i;
+
+        printk(KERN_INFO "%s: disabling port\n", hwif->name);
+
+        for (i = 0; i < MAX_HOST_PORTS; i++) {
+                if (host->ports[i] == hwif) {
+                        host->ports[i] = NULL;
+                        host->n_ports--;
+                }
+        }
+
+        ide_port_free(hwif);
+}
+
 int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
                       hw_regs_t **hws)
 {
@@ -1507,8 +1536,12 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
                         hwif->present = 1;
 
                 if (hwif->chipset != ide_4drives || !hwif->mate ||
-                    !hwif->mate->present)
-                        ide_register_port(hwif);
+                    !hwif->mate->present) {
+                        if (ide_register_port(hwif)) {
+                                ide_disable_port(hwif);
+                                continue;
+                        }
+                }
 
                 if (hwif->present)
                         ide_port_tune_devices(hwif);
@@ -1521,7 +1554,8 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
                 if (hwif_init(hwif) == 0) {
                         printk(KERN_INFO "%s: failed to initialize IDE "
                                          "interface\n", hwif->name);
-                        hwif->present = 0;
+                        device_unregister(&hwif->gendev);
+                        ide_disable_port(hwif);
                         continue;
                 }
 
@@ -1660,12 +1694,8 @@ void ide_host_free(struct ide_host *host)
         int i;
 
         ide_host_for_each_port(i, hwif, host) {
-                if (hwif == NULL)
-                        continue;
-
-                ide_port_free_devices(hwif);
-                ide_free_port_slot(hwif->index);
-                kfree(hwif);
+                if (hwif)
+                        ide_port_free(hwif);
         }
 
         kfree(host);
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
index 1d8978b3314a..a7b9287ee0d4 100644
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -231,7 +231,7 @@ static const struct ide_proc_devset ide_generic_settings[] = {
         IDE_PROC_DEVSET(pio_mode, 0, 255),
         IDE_PROC_DEVSET(unmaskirq, 0, 1),
         IDE_PROC_DEVSET(using_dma, 0, 1),
-        { 0 },
+        { NULL },
 };
 
 static void proc_ide_settings_warn(void)
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index d7ecd3c79757..4e6181c7bbda 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -169,7 +169,7 @@ typedef struct ide_tape_obj {
         ide_drive_t             *drive;
         struct ide_driver       *driver;
         struct gendisk          *disk;
-        struct kref             kref;
+        struct device           dev;
 
         /*
          *      failed_pc points to the last failed packet command, or contains
@@ -267,7 +267,7 @@ static DEFINE_MUTEX(idetape_ref_mutex);
 
 static struct class *idetape_sysfs_class;
 
-static void ide_tape_release(struct kref *);
+static void ide_tape_release(struct device *);
 
 static struct ide_tape_obj *ide_tape_get(struct gendisk *disk)
 {
@@ -279,7 +279,7 @@ static struct ide_tape_obj *ide_tape_get(struct gendisk *disk)
                 if (ide_device_get(tape->drive))
                         tape = NULL;
                 else
-                        kref_get(&tape->kref);
+                        get_device(&tape->dev);
         }
         mutex_unlock(&idetape_ref_mutex);
         return tape;
@@ -290,7 +290,7 @@ static void ide_tape_put(struct ide_tape_obj *tape)
         ide_drive_t *drive = tape->drive;
 
         mutex_lock(&idetape_ref_mutex);
-        kref_put(&tape->kref, ide_tape_release);
+        put_device(&tape->dev);
         ide_device_put(drive);
         mutex_unlock(&idetape_ref_mutex);
 }
@@ -308,7 +308,7 @@ static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i)
         mutex_lock(&idetape_ref_mutex);
         tape = idetape_devs[i];
         if (tape)
-                kref_get(&tape->kref);
+                get_device(&tape->dev);
         mutex_unlock(&idetape_ref_mutex);
         return tape;
 }
@@ -2166,7 +2166,7 @@ static const struct ide_proc_devset idetape_settings[] = {
         __IDE_PROC_DEVSET(speed,        0, 0xffff, NULL, NULL),
         __IDE_PROC_DEVSET(tdsc,         IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX,
                                         mulf_tdsc, divf_tdsc),
-        { 0 },
+        { NULL },
 };
 #endif
 
@@ -2256,15 +2256,17 @@ static void ide_tape_remove(ide_drive_t *drive)
         idetape_tape_t *tape = drive->driver_data;
 
         ide_proc_unregister_driver(drive, tape->driver);
-
+        device_del(&tape->dev);
         ide_unregister_region(tape->disk);
 
-        ide_tape_put(tape);
+        mutex_lock(&idetape_ref_mutex);
+        put_device(&tape->dev);
+        mutex_unlock(&idetape_ref_mutex);
 }
 
-static void ide_tape_release(struct kref *kref)
+static void ide_tape_release(struct device *dev)
 {
-        struct ide_tape_obj *tape = to_ide_drv(kref, ide_tape_obj);
+        struct ide_tape_obj *tape = to_ide_drv(dev, ide_tape_obj);
         ide_drive_t *drive = tape->drive;
         struct gendisk *g = tape->disk;
 
@@ -2407,7 +2409,12 @@ static int ide_tape_probe(ide_drive_t *drive)
 
         ide_init_disk(g, drive);
 
-        kref_init(&tape->kref);
+        tape->dev.parent = &drive->gendev;
+        tape->dev.release = ide_tape_release;
+        dev_set_name(&tape->dev, dev_name(&drive->gendev));
+
+        if (device_register(&tape->dev))
+                goto out_free_disk;
 
         tape->drive = drive;
         tape->driver = &idetape_driver;
@@ -2436,6 +2443,8 @@ static int ide_tape_probe(ide_drive_t *drive)
 
         return 0;
 
+out_free_disk:
+        put_disk(g);
 out_free_tape:
         kfree(tape);
 failed:
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 258805da15c3..0920e3b0c962 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -337,6 +337,7 @@ static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
         int a, b, i, j = 1;
         unsigned int *dev_param_mask = (unsigned int *)kp->arg;
 
+        /* controller . device (0 or 1) [ : 1 (set) | 0 (clear) ] */
         if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
             sscanf(s, "%d.%d", &a, &b) != 2)
                 return -EINVAL;
@@ -349,7 +350,7 @@ static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
         if (j)
                 *dev_param_mask |= (1 << i);
         else
-                *dev_param_mask &= (1 << i);
+                *dev_param_mask &= ~(1 << i);
 
         return 0;
 }
@@ -392,6 +393,8 @@ static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
 {
         int a, b, c = 0, h = 0, s = 0, i, j = 1;
 
+        /* controller . device (0 or 1) : Cylinders , Heads , Sectors */
+        /* controller . device (0 or 1) : 1 (use CHS) | 0 (ignore CHS) */
         if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
             sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
                 return -EINVAL;
@@ -407,7 +410,7 @@ static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
         if (j)
                 ide_disks |= (1 << i);
         else
-                ide_disks &= (1 << i);
+                ide_disks &= ~(1 << i);
 
         ide_disks_chs[i].cyl  = c;
         ide_disks_chs[i].head = h;
@@ -469,6 +472,8 @@ static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
 {
         int i, j = 1;
 
+        /* controller (ignore) */
+        /* controller : 1 (ignore) | 0 (use) */
         if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
                 return -EINVAL;
 
@@ -478,7 +483,7 @@ static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
         if (j)
                 ide_ignore_cable |= (1 << i);
         else
-                ide_ignore_cable &= (1 << i);
+                ide_ignore_cable &= ~(1 << i);
 
         return 0;
 }
diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
index e1c4f5437396..13b8153112ed 100644
--- a/drivers/ide/it821x.c
+++ b/drivers/ide/it821x.c
@@ -5,9 +5,8 @@
  *  May be copied or modified under the terms of the GNU General Public License
  *  Based in part on the ITE vendor provided SCSI driver.
  *
- *  Documentation available from
- *      http://www.ite.com.tw/pc/IT8212F_V04.pdf
- *  Some other documents are NDA.
+ *  Documentation:
+ *      Datasheet is freely available, some other documents under NDA.
  *
  *  The ITE8212 isn't exactly a standard IDE controller. It has two
  *  modes. In pass through mode then it is an IDE controller. In its smart
diff --git a/drivers/ide/qd65xx.c b/drivers/ide/qd65xx.c
index 5b2e3af43c4b..08c4fa35e9b1 100644
--- a/drivers/ide/qd65xx.c
+++ b/drivers/ide/qd65xx.c
@@ -16,7 +16,7 @@
 
 /*
  * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
- * Samuel Thibault <samuel.thibault@fnac.net>
+ * Samuel Thibault <samuel.thibault@ens-lyon.org>
  */
 
 #include <linux/module.h>
diff --git a/drivers/ide/qd65xx.h b/drivers/ide/qd65xx.h
index 6636f9665d16..d7e67a1a1dcc 100644
--- a/drivers/ide/qd65xx.h
+++ b/drivers/ide/qd65xx.h
@@ -4,7 +4,7 @@
 
 /*
  * Authors:     Petr Soucek <petr@ryston.cz>
- *              Samuel Thibault <samuel.thibault@fnac.net>
+ *              Samuel Thibault <samuel.thibault@ens-lyon.org>
  */
 
 /* truncates a in [b,c] */
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index 882f6f07c476..40b0812a045c 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -261,9 +261,9 @@ static int tx4939ide_build_dmatable(ide_drive_t *drive, struct request *rq)
                                 bcount = cur_len;
                         /*
                          * This workaround for zero count seems required.
-                         * (standard ide_build_dmatable do it too)
+                         * (standard ide_build_dmatable does it too)
                          */
-                        if ((bcount & 0xffff) == 0x0000)
+                        if (bcount == 0x10000)
                                 bcount = 0x8000;
                         *table++ = bcount & 0xffff;
                         *table++ = cur_addr;
diff --git a/drivers/ide/via82cxxx.c b/drivers/ide/via82cxxx.c
index 703c3eeb20a8..6092fe3f409d 100644
--- a/drivers/ide/via82cxxx.c
+++ b/drivers/ide/via82cxxx.c
@@ -448,6 +448,11 @@ static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_i
                 d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS;
 #endif
 
+#ifdef CONFIG_AMIGAONE
+        if (machine_is(amigaone))
+                d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS;
+#endif
+
         d.udma_mask = via_config->udma_mask;
 
         vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);