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path: root/drivers/ata/pata_palmld.c
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Diffstat (limited to 'drivers/ata/pata_palmld.c')
-rw-r--r--drivers/ata/pata_palmld.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/ata/pata_palmld.c b/drivers/ata/pata_palmld.c
new file mode 100644
index 000000000..8c0d7d736
--- /dev/null
+++ b/drivers/ata/pata_palmld.c
@@ -0,0 +1,137 @@
+/*
+ * 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 gpio palmld_hdd_gpios[] = {
+ { GPIO_NR_PALMLD_IDE_PWEN, GPIOF_INIT_HIGH, "HDD Power" },
+ { GPIO_NR_PALMLD_IDE_RESET, GPIOF_INIT_LOW, "HDD Reset" },
+};
+
+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 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) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ /* remap drive's physical memory address */
+ mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
+ if (!mem) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ /* request and activate power GPIO, IRQ GPIO */
+ ret = gpio_request_array(palmld_hdd_gpios,
+ ARRAY_SIZE(palmld_hdd_gpios));
+ if (ret)
+ goto err1;
+
+ /* 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_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 */
+ ret = ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
+ &palmld_sht);
+ if (ret)
+ goto err2;
+
+ return ret;
+
+err2:
+ gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
+err1:
+ return ret;
+}
+
+static int palmld_pata_remove(struct platform_device *dev)
+{
+ ata_platform_remove_one(dev);
+
+ /* power down the HDD */
+ gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);
+
+ gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
+
+ return 0;
+}
+
+static struct platform_driver palmld_pata_platform_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ },
+ .probe = palmld_pata_probe,
+ .remove = palmld_pata_remove,
+};
+
+module_platform_driver(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);