Git Repo - linux.git/blame_incremental - drivers/ata/pata

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Commit	Line	Data
	1	/*
	2	* drivers/ata/pata_palmld.c
	3	*
	4	* Driver for IDE channel in Palm LifeDrive
	5	*
	6	* Based on research of:
	7	* Alex Osborne <[email protected]>
	8	*
	9	* Rewrite for mainline:
	10	* Marek Vasut <[email protected]>
	11	*
	12	* Rewritten version based on pata_ixp4xx_cf.c:
	13	* ixp4xx PATA/Compact Flash driver
	14	* Copyright (C) 2006-07 Tower Technologies
	15	* Author: Alessandro Zummo <[email protected]>
	16	*
	17	* This program is free software; you can redistribute it and/or modify
	18	* it under the terms of the GNU General Public License version 2 as
	19	* published by the Free Software Foundation.
	20	*
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/libata.h>
	26	#include <linux/irq.h>
	27	#include <linux/platform_device.h>
	28	#include <linux/delay.h>
	29	#include <linux/gpio.h>
	30
	31	#include <scsi/scsi_host.h>
	32	#include <mach/palmld.h>
	33
	34	#define DRV_NAME "pata_palmld"
	35
	36	static struct scsi_host_template palmld_sht = {
	37	ATA_PIO_SHT(DRV_NAME),
	38	};
	39
	40	static struct ata_port_operations palmld_port_ops = {
	41	.inherits = &ata_sff_port_ops,
	42	.sff_data_xfer = ata_sff_data_xfer_noirq,
	43	.cable_detect = ata_cable_40wire,
	44	};
	45
	46	static __devinit int palmld_pata_probe(struct platform_device *pdev)
	47	{
	48	struct ata_host *host;
	49	struct ata_port *ap;
	50	void __iomem *mem;
	51	int ret;
	52
	53	/* allocate host */
	54	host = ata_host_alloc(&pdev->dev, 1);
	55	if (!host)
	56	return -ENOMEM;
	57
	58	/* remap drive's physical memory address */
	59	mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
	60	if (!mem)
	61	return -ENOMEM;
	62
	63	/* request and activate power GPIO, IRQ GPIO */
	64	ret = gpio_request(GPIO_NR_PALMLD_IDE_PWEN, "HDD PWR");
	65	if (ret)
	66	goto err1;
	67	ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_PWEN, 1);
	68	if (ret)
	69	goto err2;
	70
	71	ret = gpio_request(GPIO_NR_PALMLD_IDE_RESET, "HDD RST");
	72	if (ret)
	73	goto err2;
	74	ret = gpio_direction_output(GPIO_NR_PALMLD_IDE_RESET, 0);
	75	if (ret)
	76	goto err3;
	77
	78	/* reset the drive */
	79	gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 0);
	80	msleep(30);
	81	gpio_set_value(GPIO_NR_PALMLD_IDE_RESET, 1);
	82	msleep(30);
	83
	84	/* setup the ata port */
	85	ap = host->ports[0];
	86	ap->ops = &palmld_port_ops;
	87	ap->pio_mask = ATA_PIO4;
	88	ap->flags \|= ATA_FLAG_MMIO \| ATA_FLAG_NO_LEGACY \| ATA_FLAG_PIO_POLLING;
	89
	90	/* memory mapping voodoo */
	91	ap->ioaddr.cmd_addr = mem + 0x10;
	92	ap->ioaddr.altstatus_addr = mem + 0xe;
	93	ap->ioaddr.ctl_addr = mem + 0xe;
	94
	95	/* start the port */
	96	ata_sff_std_ports(&ap->ioaddr);
	97
	98	/* activate host */
	99	return ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
	100	&palmld_sht);
	101
	102	err3:
	103	gpio_free(GPIO_NR_PALMLD_IDE_RESET);
	104	err2:
	105	gpio_free(GPIO_NR_PALMLD_IDE_PWEN);
	106	err1:
	107	return ret;
	108	}
	109
	110	static __devexit int palmld_pata_remove(struct platform_device *dev)
	111	{
	112	struct ata_host *host = platform_get_drvdata(dev);
	113
	114	ata_host_detach(host);
	115
	116	/* power down the HDD */
	117	gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);
	118
	119	gpio_free(GPIO_NR_PALMLD_IDE_RESET);
	120	gpio_free(GPIO_NR_PALMLD_IDE_PWEN);
	121
	122	return 0;
	123	}
	124
	125	static struct platform_driver palmld_pata_platform_driver = {
	126	.driver = {
	127	.name = DRV_NAME,
	128	.owner = THIS_MODULE,
	129	},
	130	.probe = palmld_pata_probe,
	131	.remove = __devexit_p(palmld_pata_remove),
	132	};
	133
	134	static int __init palmld_pata_init(void)
	135	{
	136	return platform_driver_register(&palmld_pata_platform_driver);
	137	}
	138
	139	static void __exit palmld_pata_exit(void)
	140	{
	141	platform_driver_unregister(&palmld_pata_platform_driver);
	142	}
	143
	144	MODULE_AUTHOR("Marek Vasut <[email protected]>");
	145	MODULE_DESCRIPTION("PalmLD PATA driver");
	146	MODULE_LICENSE("GPL");
	147	MODULE_ALIAS("platform:" DRV_NAME);
	148
	149	module_init(palmld_pata_init);
	150	module_exit(palmld_pata_exit);