[mirror_ubuntu-bionic-kernel.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.h>

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

#define DRV_NAME "pata_palmld"

static struct gpio palmld_hdd_gpios[] = {
	{ GPIO_NR_PALMLD_IDE_PWEN,	GPIOF_INIT_HIGH,	"HDD Power" },
	{ GPIO_NR_PALMLD_IDE_RESET,	GPIOF_INIT_LOW,		"HDD 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_xfer_noirq,
	.cable_detect		= ata_cable_40wire,
};

static 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) {
		ret = -ENOMEM;
		goto err1;
	}

	/* remap drive's physical memory address */
	mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
	if (!mem) {
		ret = -ENOMEM;
		goto err1;
	}

	/* request and activate power GPIO, IRQ GPIO */
	ret = gpio_request_array(palmld_hdd_gpios,
				ARRAY_SIZE(palmld_hdd_gpios));
	if (ret)
		goto err1;

	/* 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 */
	ret = ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
					&palmld_sht);
	if (ret)
		goto err2;

	return ret;

err2:
	gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
err1:
	return ret;
}

static int palmld_pata_remove(struct platform_device *dev)
{
	ata_platform_remove_one(dev);

	/* power down the HDD */
	gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);

	gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));

	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>
	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
6b1e3fca MV	36	static struct gpio palmld_hdd_gpios[] = {
	37	{ GPIO_NR_PALMLD_IDE_PWEN, GPIOF_INIT_HIGH, "HDD Power" },
	38	{ GPIO_NR_PALMLD_IDE_RESET, GPIOF_INIT_LOW, "HDD Reset" },
	39	};
	40
5a9d2515 MV	41	static struct scsi_host_template palmld_sht = {
	42	ATA_PIO_SHT(DRV_NAME),
	43	};
	44
	45	static struct ata_port_operations palmld_port_ops = {
	46	.inherits = &ata_sff_port_ops,
	47	.sff_data_xfer = ata_sff_data_xfer_noirq,
	48	.cable_detect = ata_cable_40wire,
	49	};
	50
0ec24914	51	static int palmld_pata_probe(struct platform_device *pdev)
5a9d2515 MV	52	{
	53	struct ata_host *host;
	54	struct ata_port *ap;
	55	void __iomem *mem;
	56	int ret;
	57
	58	/* allocate host */
	59	host = ata_host_alloc(&pdev->dev, 1);
6b1e3fca MV	60	if (!host) {
	61	ret = -ENOMEM;
	62	goto err1;
	63	}
5a9d2515 MV	64
	65	/* remap drive's physical memory address */
	66	mem = devm_ioremap(&pdev->dev, PALMLD_IDE_PHYS, 0x1000);
6b1e3fca MV	67	if (!mem) {
	68	ret = -ENOMEM;
	69	goto err1;
	70	}
5a9d2515 MV	71
5a9d2515 MV	72	/* request and activate power GPIO, IRQ GPIO */
6b1e3fca MV	73	ret = gpio_request_array(palmld_hdd_gpios,
6b1e3fca MV	74	ARRAY_SIZE(palmld_hdd_gpios));
5a9d2515 MV	75	if (ret)
5a9d2515 MV	76	goto err1;
5a9d2515 MV	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;
9cbe056f	88	ap->flags \|= ATA_FLAG_PIO_POLLING;
5a9d2515 MV	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 */
6b1e3fca	99	ret = ata_host_activate(host, 0, NULL, IRQF_TRIGGER_RISING,
5a9d2515	100	&palmld_sht);
6b1e3fca MV	101	if (ret)
	102	goto err2;
	103
	104	return ret;
5a9d2515	105
5a9d2515	106	err2:
6b1e3fca	107	gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
5a9d2515 MV	108	err1:
	109	return ret;
	110	}
	111
0ec24914	112	static int palmld_pata_remove(struct platform_device *dev)
5a9d2515	113	{
56c1d3b7	114	ata_platform_remove_one(dev);
5a9d2515 MV	115
	116	/* power down the HDD */
	117	gpio_set_value(GPIO_NR_PALMLD_IDE_PWEN, 0);
	118
6b1e3fca	119	gpio_free_array(palmld_hdd_gpios, ARRAY_SIZE(palmld_hdd_gpios));
5a9d2515 MV	120
	121	return 0;
	122	}
	123
	124	static struct platform_driver palmld_pata_platform_driver = {
	125	.driver = {
	126	.name = DRV_NAME,
5a9d2515 MV	127	},
5a9d2515 MV	128	.probe = palmld_pata_probe,
0ec24914	129	.remove = palmld_pata_remove,
5a9d2515 MV	130	};
5a9d2515 MV	131
99c8ea3e	132	module_platform_driver(palmld_pata_platform_driver);
5a9d2515 MV	133
	134	MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
	135	MODULE_DESCRIPTION("PalmLD PATA driver");
	136	MODULE_LICENSE("GPL");
	137	MODULE_ALIAS("platform:" DRV_NAME);