[deliverable/linux.git] / drivers / ide / legacy / ide_platform.c

/*
 * Platform IDE driver
 *
 * Copyright (C) 2007 MontaVista Software
 *
 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/ide.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/ata_platform.h>
#include <linux/platform_device.h>
#include <linux/io.h>

static void __devinit plat_ide_setup_ports(hw_regs_t *hw,
					   void __iomem *base,
					   void __iomem *ctrl,
					   struct pata_platform_info *pdata,
					   int irq)
{
	unsigned long port = (unsigned long)base;
	int i;

	hw->io_ports[IDE_DATA_OFFSET] = port;

	port += (1 << pdata->ioport_shift);
	for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET;
	     i++, port += (1 << pdata->ioport_shift))
		hw->io_ports[i] = port;

	hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;

	hw->irq = irq;

	hw->chipset = ide_generic;
}

static int __devinit plat_ide_probe(struct platform_device *pdev)
{
	struct resource *res_base, *res_alt, *res_irq;
	void __iomem *base, *alt_base;
	ide_hwif_t *hwif;
	struct pata_platform_info *pdata;
	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
	int ret = 0;
	int mmio = 0;
	hw_regs_t hw;

	pdata = pdev->dev.platform_data;

	/* get a pointer to the register memory */
	res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
	res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);

	if (!res_base || !res_alt) {
		res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
		if (!res_base || !res_alt) {
			ret = -ENOMEM;
			goto out;
		}
		mmio = 1;
	}

	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res_irq) {
		ret = -EINVAL;
		goto out;
	}

	if (mmio) {
		base = devm_ioremap(&pdev->dev,
			res_base->start, res_base->end - res_base->start + 1);
		alt_base = devm_ioremap(&pdev->dev,
			res_alt->start, res_alt->end - res_alt->start + 1);
	} else {
		base = devm_ioport_map(&pdev->dev,
			res_base->start, res_base->end - res_base->start + 1);
		alt_base = devm_ioport_map(&pdev->dev,
			res_alt->start, res_alt->end - res_alt->start + 1);
	}

	hwif = ide_find_port();
	if (!hwif) {
		ret = -ENODEV;
		goto out;
	}

	memset(&hw, 0, sizeof(hw));
	plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
	hw.dev = &pdev->dev;

	ide_init_port_hw(hwif, &hw);

	if (mmio)
		default_hwif_mmiops(hwif);

	idx[0] = hwif->index;

	ide_device_add(idx, NULL);

	platform_set_drvdata(pdev, hwif);

	return 0;

out:
	return ret;
}

static int __devexit plat_ide_remove(struct platform_device *pdev)
{
	ide_hwif_t *hwif = pdev->dev.driver_data;

	ide_unregister(hwif);

	return 0;
}

static struct platform_driver platform_ide_driver = {
	.driver = {
		.name = "pata_platform",
		.owner = THIS_MODULE,
	},
	.probe = plat_ide_probe,
	.remove = __devexit_p(plat_ide_remove),
};

static int __init platform_ide_init(void)
{
	return platform_driver_register(&platform_ide_driver);
}

static void __exit platform_ide_exit(void)
{
	platform_driver_unregister(&platform_ide_driver);
}

MODULE_DESCRIPTION("Platform IDE driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pata_platform");

module_init(platform_ide_init);
module_exit(platform_ide_exit);
Commit	Line	Data
8cb1f567 AV	1	/*
	2	* Platform IDE driver
	3	*
	4	* Copyright (C) 2007 MontaVista Software
	5	*
	6	* Maintainer: Kumar Gala <galak@kernel.crashing.org>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/types.h>
	15	#include <linux/init.h>
	16	#include <linux/kernel.h>
	17	#include <linux/ide.h>
	18	#include <linux/ioport.h>
	19	#include <linux/module.h>
0a87e3e9	20	#include <linux/ata_platform.h>
8cb1f567 AV	21	#include <linux/platform_device.h>
	22	#include <linux/io.h>
	23
57c802e8 BZ	24	static void __devinit plat_ide_setup_ports(hw_regs_t *hw,
	25	void __iomem *base,
	26	void __iomem *ctrl,
	27	struct pata_platform_info *pdata,
	28	int irq)
8cb1f567 AV	29	{
8cb1f567 AV	30	unsigned long port = (unsigned long)base;
baa8f3e9	31	int i;
8cb1f567	32
57c802e8	33	hw->io_ports[IDE_DATA_OFFSET] = port;
8cb1f567 AV	34
	35	port += (1 << pdata->ioport_shift);
	36	for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET;
	37	i++, port += (1 << pdata->ioport_shift))
57c802e8	38	hw->io_ports[i] = port;
8cb1f567	39
57c802e8	40	hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
8cb1f567	41
57c802e8	42	hw->irq = irq;
8cb1f567	43
57c802e8	44	hw->chipset = ide_generic;
8cb1f567 AV	45	}
	46
	47	static int __devinit plat_ide_probe(struct platform_device *pdev)
	48	{
	49	struct resource res_base, res_alt, *res_irq;
04244937	50	void __iomem base, alt_base;
8cb1f567 AV	51	ide_hwif_t *hwif;
8cb1f567 AV	52	struct pata_platform_info *pdata;
8447d9d5	53	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
8cb1f567 AV	54	int ret = 0;
8cb1f567 AV	55	int mmio = 0;
57c802e8	56	hw_regs_t hw;
8cb1f567 AV	57
	58	pdata = pdev->dev.platform_data;
	59
	60	/* get a pointer to the register memory */
	61	res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
	62	res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
	63
	64	if (!res_base \|\| !res_alt) {
	65	res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	66	res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	67	if (!res_base \|\| !res_alt) {
	68	ret = -ENOMEM;
	69	goto out;
	70	}
	71	mmio = 1;
	72	}
	73
	74	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	75	if (!res_irq) {
	76	ret = -EINVAL;
	77	goto out;
	78	}
	79
	80	if (mmio) {
04244937	81	base = devm_ioremap(&pdev->dev,
8cb1f567	82	res_base->start, res_base->end - res_base->start + 1);
04244937	83	alt_base = devm_ioremap(&pdev->dev,
8cb1f567 AV	84	res_alt->start, res_alt->end - res_alt->start + 1);
8cb1f567 AV	85	} else {
04244937	86	base = devm_ioport_map(&pdev->dev,
8cb1f567	87	res_base->start, res_base->end - res_base->start + 1);
04244937	88	alt_base = devm_ioport_map(&pdev->dev,
8cb1f567 AV	89	res_alt->start, res_alt->end - res_alt->start + 1);
	90	}
	91
59bff5ba	92	hwif = ide_find_port();
8cb1f567 AV	93	if (!hwif) {
	94	ret = -ENODEV;
	95	goto out;
	96	}
57c802e8 BZ	97
57c802e8 BZ	98	memset(&hw, 0, sizeof(hw));
04244937	99	plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
57c802e8 BZ	100	hw.dev = &pdev->dev;
	101
	102	ide_init_port_hw(hwif, &hw);
	103
3e2990ea	104	if (mmio)
57c802e8	105	default_hwif_mmiops(hwif);
57c802e8	106
8447d9d5 BZ	107	idx[0] = hwif->index;
8447d9d5 BZ	108
c413b9b9	109	ide_device_add(idx, NULL);
8cb1f567 AV	110
8cb1f567 AV	111	platform_set_drvdata(pdev, hwif);
8cb1f567 AV	112
	113	return 0;
	114
	115	out:
	116	return ret;
	117	}
	118
	119	static int __devexit plat_ide_remove(struct platform_device *pdev)
	120	{
	121	ide_hwif_t *hwif = pdev->dev.driver_data;
	122
387750c3	123	ide_unregister(hwif);
8cb1f567 AV	124
	125	return 0;
	126	}
	127
	128	static struct platform_driver platform_ide_driver = {
	129	.driver = {
	130	.name = "pata_platform",
458622fc	131	.owner = THIS_MODULE,
8cb1f567 AV	132	},
	133	.probe = plat_ide_probe,
	134	.remove = __devexit_p(plat_ide_remove),
	135	};
	136
	137	static int __init platform_ide_init(void)
	138	{
	139	return platform_driver_register(&platform_ide_driver);
	140	}
	141
	142	static void __exit platform_ide_exit(void)
	143	{
	144	platform_driver_unregister(&platform_ide_driver);
	145	}
	146
	147	MODULE_DESCRIPTION("Platform IDE driver");
	148	MODULE_LICENSE("GPL");
458622fc	149	MODULE_ALIAS("platform:pata_platform");
8cb1f567 AV	150
	151	module_init(platform_ide_init);
	152	module_exit(platform_ide_exit);