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>
 20#include <linux/ata_platform.h>
 21#include <linux/platform_device.h>
 22#include <linux/interrupt.h>
 23#include <linux/io.h>
 24
 25static void __devinit plat_ide_setup_ports(struct ide_hw *hw,
 26					   void __iomem *base,
 27					   void __iomem *ctrl,
 28					   struct pata_platform_info *pdata,
 29					   int irq)
 30{
 31	unsigned long port = (unsigned long)base;
 32	int i;
 33
 34	hw->io_ports.data_addr = port;
 35
 36	port += (1 << pdata->ioport_shift);
 37	for (i = 1; i <= 7;
 38	     i++, port += (1 << pdata->ioport_shift))
 39		hw->io_ports_array[i] = port;
 40
 41	hw->io_ports.ctl_addr = (unsigned long)ctrl;
 42
 43	hw->irq = irq;
 44}
 45
 46static const struct ide_port_info platform_ide_port_info = {
 47	.host_flags		= IDE_HFLAG_NO_DMA,
 48	.chipset		= ide_generic,
 49};
 50
 51static int __devinit plat_ide_probe(struct platform_device *pdev)
 52{
 53	struct resource *res_base, *res_alt, *res_irq;
 54	void __iomem *base, *alt_base;
 55	struct pata_platform_info *pdata;
 56	struct ide_host *host;
 57	int ret = 0, mmio = 0;
 58	struct ide_hw hw, *hws[] = { &hw };
 59	struct ide_port_info d = platform_ide_port_info;
 60
 61	pdata = pdev->dev.platform_data;
 62
 63	/* get a pointer to the register memory */
 64	res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
 65	res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
 66
 67	if (!res_base || !res_alt) {
 68		res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 69		res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 70		if (!res_base || !res_alt) {
 71			ret = -ENOMEM;
 72			goto out;
 73		}
 74		mmio = 1;
 75	}
 76
 77	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 78	if (!res_irq) {
 79		ret = -EINVAL;
 80		goto out;
 81	}
 82
 83	if (mmio) {
 84		base = devm_ioremap(&pdev->dev,
 85			res_base->start, resource_size(res_base));
 86		alt_base = devm_ioremap(&pdev->dev,
 87			res_alt->start, resource_size(res_alt));
 88	} else {
 89		base = devm_ioport_map(&pdev->dev,
 90			res_base->start, resource_size(res_base));
 91		alt_base = devm_ioport_map(&pdev->dev,
 92			res_alt->start, resource_size(res_alt));
 93	}
 94
 95	memset(&hw, 0, sizeof(hw));
 96	plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
 97	hw.dev = &pdev->dev;
 98
 99	d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
100	if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
101		d.irq_flags |= IRQF_SHARED;
102
103	if (mmio)
104		d.host_flags |= IDE_HFLAG_MMIO;
105
106	ret = ide_host_add(&d, hws, 1, &host);
107	if (ret)
108		goto out;
109
110	platform_set_drvdata(pdev, host);
111
112	return 0;
113
114out:
115	return ret;
116}
117
118static int __devexit plat_ide_remove(struct platform_device *pdev)
119{
120	struct ide_host *host = dev_get_drvdata(&pdev->dev);
121
122	ide_host_remove(host);
123
124	return 0;
125}
126
127static struct platform_driver platform_ide_driver = {
128	.driver = {
129		.name = "pata_platform",
130		.owner = THIS_MODULE,
131	},
132	.probe = plat_ide_probe,
133	.remove = __devexit_p(plat_ide_remove),
134};
135
136static int __init platform_ide_init(void)
137{
138	return platform_driver_register(&platform_ide_driver);
139}
140
141static void __exit platform_ide_exit(void)
142{
143	platform_driver_unregister(&platform_ide_driver);
144}
145
146MODULE_DESCRIPTION("Platform IDE driver");
147MODULE_LICENSE("GPL");
148MODULE_ALIAS("platform:pata_platform");
149
150module_init(platform_ide_init);
151module_exit(platform_ide_exit);