152 lines
3.4 KiB
C
152 lines
3.4 KiB
C
/*
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* drivers/ata/pata_palmld.c
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*
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* Driver for IDE channel in Palm LifeDrive
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*
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* Based on research of:
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* Alex Osborne <ato@meshy.org>
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*
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* Rewrite for mainline:
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* Marek Vasut <marek.vasut@gmail.com>
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*
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* Rewritten version based on pata_ixp4xx_cf.c:
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* ixp4xx PATA/Compact Flash driver
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* Copyright (C) 2006-07 Tower Technologies
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* Author: Alessandro Zummo <a.zummo@towertech.it>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/libata.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <scsi/scsi_host.h>
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#include <mach/palmld.h>
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#define DRV_NAME "pata_palmld"
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static struct gpio palmld_hdd_gpios[] = {
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{ GPIO_NR_PALMLD_IDE_PWEN, GPIOF_INIT_HIGH, "HDD Power" },
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{ GPIO_NR_PALMLD_IDE_RESET, GPIOF_INIT_LOW, "HDD Reset" },
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};
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static struct scsi_host_template palmld_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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static struct ata_port_operations palmld_port_ops = {
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.inherits = &ata_sff_port_ops,
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.sff_data_xfer = ata_sff_data_xfer_noirq,
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.cable_detect = ata_cable_40wire,
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};
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static __devinit int palmld_pata_probe(struct platform_device *pdev)
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{
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struct ata_host *host;
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struct ata_port *ap;
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void __iomem *mem;
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int ret;
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/* allocate host */
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host = ata_host_alloc(&pdev->dev, 1);
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if (!host) {
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ret = -ENOMEM;
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goto err1;
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}
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/* remap drive's physical memory address */
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mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
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if (!mem) {
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ret = -ENOMEM;
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goto err1;
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}
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/* request and activate power GPIO, IRQ GPIO */
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ret = gpio_request_array(palmld_hdd_gpios,
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ARRAY_SIZE(palmld_hdd_gpios));
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if (ret)
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goto err1;
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/* reset the drive */
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gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 0);
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msleep(30);
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gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 1);
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msleep(30);
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/* setup the ata port */
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ap = host->ports[0];
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ap->ops = &palmld_port_ops;
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ap->pio_mask = ATA_PIO4;
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ap->flags |= ATA_FLAG_PIO_POLLING;
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/* memory mapping voodoo */
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ap->ioaddr.cmd_addr = mem + 0x10;
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ap->ioaddr.altstatus_addr = mem + 0xe;
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ap->ioaddr.ctl_addr = mem + 0xe;
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/* start the port */
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ata_sff_std_ports(&ap->ioaddr);
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/* activate host */
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ret = ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
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&palmld_sht);
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if (ret)
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goto err2;
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return ret;
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err2:
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gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
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err1:
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return ret;
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}
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static __devexit int palmld_pata_remove(struct platform_device *dev)
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{
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struct ata_host *host = platform_get_drvdata(dev);
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ata_host_detach(host);
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/* power down the HDD */
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gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);
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gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
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return 0;
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}
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static struct platform_driver palmld_pata_platform_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.probe = palmld_pata_probe,
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.remove = __devexit_p(palmld_pata_remove),
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};
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static int __init palmld_pata_init(void)
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{
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return platform_driver_register(&palmld_pata_platform_driver);
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}
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static void __exit palmld_pata_exit(void)
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{
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platform_driver_unregister(&palmld_pata_platform_driver);
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}
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MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
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MODULE_DESCRIPTION("PalmLD PATA driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DRV_NAME);
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module_init(palmld_pata_init);
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module_exit(palmld_pata_exit);
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