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/*
* 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/pata_platform.h>
#include <linux/platform_device.h>
#include <linux/io.h>
static struct {
void __iomem *plat_ide_mapbase;
void __iomem *plat_ide_alt_mapbase;
ide_hwif_t *hwif;
int index;
} hwif_prop;
static ide_hwif_t *__devinit plat_ide_locate_hwif(void __iomem *base,
void __iomem *ctrl, struct pata_platform_info *pdata, int irq,
int mmio)
{
unsigned long port = (unsigned long)base;
ide_hwif_t *hwif;
int index, i;
for (index = 0; index < MAX_HWIFS; ++index) {
hwif = ide_hwifs + index;
if (hwif->io_ports[IDE_DATA_OFFSET] == port)
goto found;
}
for (index = 0; index < MAX_HWIFS; ++index) {
hwif = ide_hwifs + index;
if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
goto found;
}
return NULL;
found:
hwif->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))
hwif->hw.io_ports[i] = port;
hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
hwif->hw.irq = hwif->irq = irq;
hwif->hw.dma = NO_DMA;
hwif->chipset = hwif->hw.chipset = ide_generic;
if (mmio) {
hwif->mmio = 1;
default_hwif_mmiops(hwif);
}
hwif_prop.hwif = hwif;
hwif_prop.index = index;
return hwif;
}
static int __devinit plat_ide_probe(struct platform_device *pdev)
{
struct resource *res_base, *res_alt, *res_irq;
ide_hwif_t *hwif;
struct pata_platform_info *pdata;
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
int ret = 0;
int mmio = 0;
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) {
hwif_prop.plat_ide_mapbase = devm_ioremap(&pdev->dev,
res_base->start, res_base->end - res_base->start + 1);
hwif_prop.plat_ide_alt_mapbase = devm_ioremap(&pdev->dev,
res_alt->start, res_alt->end - res_alt->start + 1);
} else {
hwif_prop.plat_ide_mapbase = devm_ioport_map(&pdev->dev,
res_base->start, res_base->end - res_base->start + 1);
hwif_prop.plat_ide_alt_mapbase = devm_ioport_map(&pdev->dev,
res_alt->start, res_alt->end - res_alt->start + 1);
}
hwif = plat_ide_locate_hwif(hwif_prop.plat_ide_mapbase,
hwif_prop.plat_ide_alt_mapbase, pdata, res_irq->start, mmio);
if (!hwif) {
ret = -ENODEV;
goto out;
}
hwif->gendev.parent = &pdev->dev;
hwif->noprobe = 0;
idx[0] = hwif->index;
ide_device_add(idx);
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;
if (hwif != hwif_prop.hwif) {
dev_printk(KERN_DEBUG, &pdev->dev, "%s: hwif value error",
pdev->name);
} else {
ide_unregister(hwif_prop.index);
hwif_prop.index = 0;
hwif_prop.hwif = NULL;
}
return 0;
}
static struct platform_driver platform_ide_driver = {
.driver = {
.name = "pata_platform",
},
.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_init(platform_ide_init);
module_exit(platform_ide_exit);
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