[linux-2.6-block.git] / drivers / ata / pata_palmld.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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>
 */

#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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
5a9d2515 MV	2	/*
	3	* drivers/ata/pata_palmld.c
	4	*
	5	* Driver for IDE channel in Palm LifeDrive
	6	*
	7	* Based on research of:
	8	* Alex Osborne <ato@meshy.org>
	9	*
	10	* Rewrite for mainline:
	11	* Marek Vasut <marek.vasut@gmail.com>
	12	*
	13	* Rewritten version based on pata_ixp4xx_cf.c:
	14	* ixp4xx PATA/Compact Flash driver
	15	* Copyright (C) 2006-07 Tower Technologies
	16	* Author: Alessandro Zummo <a.zummo@towertech.it>
5a9d2515 MV	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/libata.h>
	22	#include <linux/irq.h>
	23	#include <linux/platform_device.h>
	24	#include <linux/delay.h>
f43e4b00	25	#include <linux/gpio/consumer.h>
5a9d2515 MV	26
	27	#include <scsi/scsi_host.h>
	28	#include <mach/palmld.h>
	29
	30	#define DRV_NAME "pata_palmld"
	31
614c61a6 LW	32	struct palmld_pata {
	33	struct ata_host *host;
	34	struct gpio_desc *power;
	35	struct gpio_desc *reset;
	36	};
6b1e3fca	37
5a9d2515 MV	38	static struct scsi_host_template palmld_sht = {
	39	ATA_PIO_SHT(DRV_NAME),
	40	};
	41
	42	static struct ata_port_operations palmld_port_ops = {
	43	.inherits = &ata_sff_port_ops,
23ebda2f	44	.sff_data_xfer = ata_sff_data_xfer32,
5a9d2515 MV	45	.cable_detect = ata_cable_40wire,
	46	};
	47
0ec24914	48	static int palmld_pata_probe(struct platform_device *pdev)
5a9d2515	49	{
614c61a6	50	struct palmld_pata *lda;
5a9d2515 MV	51	struct ata_port *ap;
5a9d2515 MV	52	void __iomem *mem;
f43e4b00	53	struct device *dev = &pdev->dev;
5a9d2515 MV	54	int ret;
5a9d2515 MV	55
614c61a6 LW	56	lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
	57	if (!lda)
	58	return -ENOMEM;
	59
5a9d2515	60	/* allocate host */
614c61a6 LW	61	lda->host = ata_host_alloc(dev, 1);
614c61a6 LW	62	if (!lda->host)
f43e4b00	63	return -ENOMEM;
5a9d2515 MV	64
5a9d2515 MV	65	/* remap drive's physical memory address */
f43e4b00 LW	66	mem = devm_ioremap(dev, PALMLD_IDE_PHYS, 0x1000);
	67	if (!mem)
	68	return -ENOMEM;
	69
	70	/* request and activate power and reset GPIOs */
614c61a6 LW	71	lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
	72	if (IS_ERR(lda->power))
	73	return PTR_ERR(lda->power);
	74	lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
	75	if (IS_ERR(lda->reset)) {
	76	gpiod_set_value(lda->power, 0);
	77	return PTR_ERR(lda->reset);
6b1e3fca	78	}
5a9d2515	79
f43e4b00	80	/* Assert reset to reset the drive */
614c61a6	81	gpiod_set_value(lda->reset, 1);
5a9d2515	82	msleep(30);
614c61a6	83	gpiod_set_value(lda->reset, 0);
5a9d2515 MV	84	msleep(30);
	85
	86	/* setup the ata port */
614c61a6	87	ap = lda->host->ports[0];
5a9d2515 MV	88	ap->ops = &palmld_port_ops;
5a9d2515 MV	89	ap->pio_mask = ATA_PIO4;
9cbe056f	90	ap->flags \|= ATA_FLAG_PIO_POLLING;
5a9d2515 MV	91
	92	/* memory mapping voodoo */
	93	ap->ioaddr.cmd_addr = mem + 0x10;
	94	ap->ioaddr.altstatus_addr = mem + 0xe;
	95	ap->ioaddr.ctl_addr = mem + 0xe;
	96
	97	/* start the port */
	98	ata_sff_std_ports(&ap->ioaddr);
	99
	100	/* activate host */
614c61a6 LW	101	ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
614c61a6 LW	102	&palmld_sht);
f43e4b00	103	/* power down on failure */
614c61a6 LW	104	if (ret) {
	105	gpiod_set_value(lda->power, 0);
	106	return ret;
	107	}
	108
	109	platform_set_drvdata(pdev, lda);
	110	return 0;
5a9d2515 MV	111	}
5a9d2515 MV	112
614c61a6	113	static int palmld_pata_remove(struct platform_device *pdev)
5a9d2515	114	{
614c61a6 LW	115	struct palmld_pata *lda = platform_get_drvdata(pdev);
	116
	117	ata_platform_remove_one(pdev);
5a9d2515 MV	118
5a9d2515 MV	119	/* power down the HDD */
614c61a6	120	gpiod_set_value(lda->power, 0);
5a9d2515 MV	121
	122	return 0;
	123	}
	124
	125	static struct platform_driver palmld_pata_platform_driver = {
	126	.driver = {
	127	.name = DRV_NAME,
5a9d2515 MV	128	},
5a9d2515 MV	129	.probe = palmld_pata_probe,
0ec24914	130	.remove = palmld_pata_remove,
5a9d2515 MV	131	};
5a9d2515 MV	132
99c8ea3e	133	module_platform_driver(palmld_pata_platform_driver);
5a9d2515 MV	134
	135	MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
	136	MODULE_DESCRIPTION("PalmLD PATA driver");
	137	MODULE_LICENSE("GPL");
	138	MODULE_ALIAS("platform:" DRV_NAME);