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