mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
![]() |
/*
|
||
|
* 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);
|