21 files changed, 590 insertions, 51 deletions

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 3dad2299d9c5..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>.
 
@@ -721,6 +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 d0e3d7d5b467..1c326d94aa6d 100644
--- a/drivers/ide/Makefile
+++ b/drivers/ide/Makefile
@@ -116,3 +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/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 0bfeb0c79d6e..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);
@@ -1790,15 +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;
@@ -1997,7 +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;
@@ -2011,7 +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;
         }
 
@@ -2021,6 +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 9ee51adf567f..a9a6c208288a 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -908,7 +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);
@@ -1162,6 +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 ce0818a993f6..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) {
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