[ARM] 5522/1: PalmLD: IDE support

Support for Palm LifeDrive's internal harddrive.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-pxa/include/mach/palmld.h b/arch/arm/mach-pxa/include/mach/palmld.h
index fb13c82..8721b80 100644 (file)
--- a/arch/arm/mach-pxa/include/mach/palmld.h
+++ b/arch/arm/mach-pxa/include/mach/palmld.h
@@ -56,7 +56,6 @@
 #define GPIO_NR_PALMLD_LED_AMBER       94
 
 /* IDE */
-#define GPIO_NR_PALMLD_IDE_IRQ         95
 #define GPIO_NR_PALMLD_IDE_RESET       98
 #define GPIO_NR_PALMLD_IDE_PWEN                115
 

diff --git a/arch/arm/mach-pxa/palmld.c b/arch/arm/mach-pxa/palmld.c
index 1cec180..24a967e 100644 (file)
--- a/arch/arm/mach-pxa/palmld.c
+++ b/arch/arm/mach-pxa/palmld.c
@@ -127,7 +127,7 @@ static unsigned long palmld_pin_config[] __initdata = {
        GPIO81_GPIO,    /* wifi reset */
 
        /* HDD */
-       GPIO95_GPIO,    /* HDD irq */
+       GPIO98_GPIO,    /* HDD reset */
        GPIO115_GPIO,   /* HDD power */
 
        /* MISC */
@@ -493,6 +493,14 @@ static struct platform_device palmld_asoc = {
        },
 };
 
+/******************************************************************************
+ * HDD
+ ******************************************************************************/
+static struct platform_device palmld_hdd = {
+       .name   = "pata_palmld",
+       .id     = -1,
+};
+
 /******************************************************************************
  * Framebuffer
  ******************************************************************************/
@@ -557,6 +565,7 @@ static struct platform_device *devices[] __initdata = {
        &palmld_leds,
        &power_supply,
        &palmld_asoc,
+       &palmld_hdd,
 };
 
 static struct map_desc palmld_io_desc[] __initdata = {

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 9120717..2aa1908 100644 (file)
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -535,6 +535,15 @@ config PATA_OPTIDMA
 
          If unsure, say N.
 
+config PATA_PALMLD
+       tristate "Palm LifeDrive PATA support"
+       depends on MACH_PALMLD
+       help
+         This option enables support for Palm LifeDrive's internal ATA
+         port via the new ATA layer.
+
+         If unsure, say N.
+
 config PATA_PCMCIA
        tristate "PCMCIA PATA support"
        depends on PCMCIA

diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 7f1ecf9..1558059 100644 (file)
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_PATA_MPC52xx)    += pata_mpc52xx.o
 obj-$(CONFIG_PATA_MARVELL)     += pata_marvell.o
 obj-$(CONFIG_PATA_MPIIX)       += pata_mpiix.o
 obj-$(CONFIG_PATA_OLDPIIX)     += pata_oldpiix.o
+obj-$(CONFIG_PATA_PALMLD)      += pata_palmld.o
 obj-$(CONFIG_PATA_PCMCIA)      += pata_pcmcia.o
 obj-$(CONFIG_PATA_PDC2027X)    += pata_pdc2027x.o
 obj-$(CONFIG_PATA_PDC_OLD)     += pata_pdc202xx_old.o

diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c
new file mode 100644 (file)
index 0000000..11fb4cc
--- /dev/null
+++ b/drivers/ata/pata_palmld.c
@@ -0,0 +1,150 @@
+/*
+ * drivers/ata/pata_palmld.c
+ *
+ * Driver for IDE channel in Palm LifeDrive
+ *
+ * Based on research of:
+ *             Alex Osborne <ato@meshy.org>
+ *
+ * Rewrite for mainline:
+ *             Marek Vasut <marek.vasut@gmail.com>
+ *
+ * Rewritten version based on pata_ixp4xx_cf.c:
+ * ixp4xx PATA/Compact Flash driver
+ * Copyright (C) 2006-07 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/libata.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+
+#include <scsi/scsi_host.h>
+#include <mach/palmld.h>
+
+#define DRV_NAME "pata_palmld"
+
+static struct scsi_host_template palmld_sht = {
+       ATA_PIO_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations palmld_port_ops = {
+       .inherits               = &ata_sff_port_ops,
+       .sff_data_xfer          = ata_sff_data_xfer_noirq,
+       .cable_detect           = ata_cable_40wire,
+};
+
+static __devinit int palmld_pata_probe(struct platform_device *pdev)
+{
+       struct ata_host *host;
+       struct ata_port *ap;
+       void __iomem *mem;
+       int ret;
+
+       /* allocate host */
+       host = ata_host_alloc(&pdev->dev, 1);
+       if (!host)
+               return -ENOMEM;
+
+       /* remap drive's physical memory address */
+       mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
+       if (!mem)
+               return -ENOMEM;
+
+       /* request and activate power GPIO, IRQ GPIO */
+       ret = gpio_request(GPIO_NR_PALMLD_IDE_PWEN, "HDD PWR");
+       if (ret)
+               goto err1;
+       ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_PWEN, 1);
+       if (ret)
+               goto err2;
+
+       ret = gpio_request(GPIO_NR_PALMLD_IDE_RESET, "HDD RST");
+       if (ret)
+               goto err2;
+       ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_RESET, 0);
+       if (ret)
+               goto err3;
+
+       /* reset the drive */
+       gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 0);
+       msleep(30);
+       gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 1);
+       msleep(30);
+
+       /* setup the ata port */
+       ap = host->ports[0];
+       ap->ops = &palmld_port_ops;
+       ap->pio_mask = ATA_PIO4;
+       ap->flags |= ATA_FLAG_MMIO | ATA_FLAG_NO_LEGACY | ATA_FLAG_PIO_POLLING;
+
+       /* memory mapping voodoo */
+       ap->ioaddr.cmd_addr = mem + 0x10;
+       ap->ioaddr.altstatus_addr = mem + 0xe;
+       ap->ioaddr.ctl_addr = mem + 0xe;
+
+       /* start the port */
+       ata_sff_std_ports(&ap->ioaddr);
+
+       /* activate host */
+       return ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
+                                       &palmld_sht);
+
+err3:
+       gpio_free(GPIO_NR_PALMLD_IDE_RESET);
+err2:
+       gpio_free(GPIO_NR_PALMLD_IDE_PWEN);
+err1:
+       return ret;
+}
+
+static __devexit int palmld_pata_remove(struct platform_device *dev)
+{
+       struct ata_host *host = platform_get_drvdata(dev);
+
+       ata_host_detach(host);
+
+       /* power down the HDD */
+       gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);
+
+       gpio_free(GPIO_NR_PALMLD_IDE_RESET);
+       gpio_free(GPIO_NR_PALMLD_IDE_PWEN);
+
+       return 0;
+}
+
+static struct platform_driver palmld_pata_platform_driver = {
+       .driver  = {
+               .name   = DRV_NAME,
+               .owner  = THIS_MODULE,
+       },
+       .probe          = palmld_pata_probe,
+       .remove         = __devexit_p(palmld_pata_remove),
+};
+
+static int __init palmld_pata_init(void)
+{
+       return platform_driver_register(&palmld_pata_platform_driver);
+}
+
+static void __exit palmld_pata_exit(void)
+{
+       platform_driver_unregister(&palmld_pata_platform_driver);
+}
+
+MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
+MODULE_DESCRIPTION("PalmLD PATA driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
+
+module_init(palmld_pata_init);
+module_exit(palmld_pata_exit);