[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>

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c
new file mode 100644
index 000000000000..11fb4ccc74b4
--- /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);