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/*
* 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_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);
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