[linux-2.6-block.git] / drivers / ata / pata_palmld.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/consumer.h>

#include <scsi/scsi_host.h>
#include <mach/palmld.h>

#define DRV_NAME "pata_palmld"

struct palmld_pata {
	struct ata_host *host;
	struct gpio_desc *power;
	struct gpio_desc *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_xfer32,
	.cable_detect		= ata_cable_40wire,
};

static int palmld_pata_probe(struct platform_device *pdev)
{
	struct palmld_pata *lda;
	struct ata_port *ap;
	void __iomem *mem;
	struct device *dev = &pdev->dev;
	int ret;

	lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
	if (!lda)
		return -ENOMEM;

	/* allocate host */
	lda->host = ata_host_alloc(dev, 1);
	if (!lda->host)
		return -ENOMEM;

	/* remap drive's physical memory address */
	mem = devm_ioremap(dev, PALMLD_IDE_PHYS, 0x1000);
	if (!mem)
		return -ENOMEM;

	/* request and activate power and reset GPIOs */
	lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
	if (IS_ERR(lda->power))
		return PTR_ERR(lda->power);
	lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(lda->reset)) {
		gpiod_set_value(lda->power, 0);
		return PTR_ERR(lda->reset);
	}

	/* Assert reset to reset the drive */
	gpiod_set_value(lda->reset, 1);
	msleep(30);
	gpiod_set_value(lda->reset, 0);
	msleep(30);

	/* setup the ata port */
	ap = lda->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(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
				&palmld_sht);
	/* power down on failure */
	if (ret) {
		gpiod_set_value(lda->power, 0);
		return ret;
	}

	platform_set_drvdata(pdev, lda);
	return 0;
}

static int palmld_pata_remove(struct platform_device *pdev)
{
	struct palmld_pata *lda = platform_get_drvdata(pdev);

	ata_platform_remove_one(pdev);

	/* power down the HDD */
	gpiod_set_value(lda->power, 0);

	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);
Commit	Line	Data
5a9d2515 MV	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 <ato@meshy.org>
	8	*
	9	* Rewrite for mainline:
	10	* Marek Vasut <marek.vasut@gmail.com>
	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 <a.zummo@towertech.it>
	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>
f43e4b00	29	#include <linux/gpio/consumer.h>
5a9d2515 MV	30
	31	#include <scsi/scsi_host.h>
	32	#include <mach/palmld.h>
	33
	34	#define DRV_NAME "pata_palmld"
	35
614c61a6 LW	36	struct palmld_pata {
	37	struct ata_host *host;
	38	struct gpio_desc *power;
	39	struct gpio_desc *reset;
	40	};
6b1e3fca	41
5a9d2515 MV	42	static struct scsi_host_template palmld_sht = {
	43	ATA_PIO_SHT(DRV_NAME),
	44	};
	45
	46	static struct ata_port_operations palmld_port_ops = {
	47	.inherits = &ata_sff_port_ops,
23ebda2f	48	.sff_data_xfer = ata_sff_data_xfer32,
5a9d2515 MV	49	.cable_detect = ata_cable_40wire,
	50	};
	51
0ec24914	52	static int palmld_pata_probe(struct platform_device *pdev)
5a9d2515	53	{
614c61a6	54	struct palmld_pata *lda;
5a9d2515 MV	55	struct ata_port *ap;
5a9d2515 MV	56	void __iomem *mem;
f43e4b00	57	struct device *dev = &pdev->dev;
5a9d2515 MV	58	int ret;
5a9d2515 MV	59
614c61a6 LW	60	lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
	61	if (!lda)
	62	return -ENOMEM;
	63
5a9d2515	64	/* allocate host */
614c61a6 LW	65	lda->host = ata_host_alloc(dev, 1);
614c61a6 LW	66	if (!lda->host)
f43e4b00	67	return -ENOMEM;
5a9d2515 MV	68
5a9d2515 MV	69	/* remap drive's physical memory address */
f43e4b00 LW	70	mem = devm_ioremap(dev, PALMLD_IDE_PHYS, 0x1000);
	71	if (!mem)
	72	return -ENOMEM;
	73
	74	/* request and activate power and reset GPIOs */
614c61a6 LW	75	lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
	76	if (IS_ERR(lda->power))
	77	return PTR_ERR(lda->power);
	78	lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
	79	if (IS_ERR(lda->reset)) {
	80	gpiod_set_value(lda->power, 0);
	81	return PTR_ERR(lda->reset);
6b1e3fca	82	}
5a9d2515	83
f43e4b00	84	/* Assert reset to reset the drive */
614c61a6	85	gpiod_set_value(lda->reset, 1);
5a9d2515	86	msleep(30);
614c61a6	87	gpiod_set_value(lda->reset, 0);
5a9d2515 MV	88	msleep(30);
	89
	90	/* setup the ata port */
614c61a6	91	ap = lda->host->ports[0];
5a9d2515 MV	92	ap->ops = &palmld_port_ops;
5a9d2515 MV	93	ap->pio_mask = ATA_PIO4;
9cbe056f	94	ap->flags \|= ATA_FLAG_PIO_POLLING;
5a9d2515 MV	95
	96	/* memory mapping voodoo */
	97	ap->ioaddr.cmd_addr = mem + 0x10;
	98	ap->ioaddr.altstatus_addr = mem + 0xe;
	99	ap->ioaddr.ctl_addr = mem + 0xe;
	100
	101	/* start the port */
	102	ata_sff_std_ports(&ap->ioaddr);
	103
	104	/* activate host */
614c61a6 LW	105	ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
614c61a6 LW	106	&palmld_sht);
f43e4b00	107	/* power down on failure */
614c61a6 LW	108	if (ret) {
	109	gpiod_set_value(lda->power, 0);
	110	return ret;
	111	}
	112
	113	platform_set_drvdata(pdev, lda);
	114	return 0;
5a9d2515 MV	115	}
5a9d2515 MV	116
614c61a6	117	static int palmld_pata_remove(struct platform_device *pdev)
5a9d2515	118	{
614c61a6 LW	119	struct palmld_pata *lda = platform_get_drvdata(pdev);
	120
	121	ata_platform_remove_one(pdev);
5a9d2515 MV	122
5a9d2515 MV	123	/* power down the HDD */
614c61a6	124	gpiod_set_value(lda->power, 0);
5a9d2515 MV	125
	126	return 0;
	127	}
	128
	129	static struct platform_driver palmld_pata_platform_driver = {
	130	.driver = {
	131	.name = DRV_NAME,
5a9d2515 MV	132	},
5a9d2515 MV	133	.probe = palmld_pata_probe,
0ec24914	134	.remove = palmld_pata_remove,
5a9d2515 MV	135	};
5a9d2515 MV	136
99c8ea3e	137	module_platform_driver(palmld_pata_platform_driver);
5a9d2515 MV	138
	139	MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
	140	MODULE_DESCRIPTION("PalmLD PATA driver");
	141	MODULE_LICENSE("GPL");
	142	MODULE_ALIAS("platform:" DRV_NAME);