169 lines
3.9 KiB
C
169 lines
3.9 KiB
C
/*
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* Platform IDE driver
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*
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* Copyright (C) 2007 MontaVista Software
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*
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* Maintainer: Kumar Gala <galak@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/ide.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/pata_platform.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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static struct {
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void __iomem *plat_ide_mapbase;
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void __iomem *plat_ide_alt_mapbase;
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ide_hwif_t *hwif;
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int index;
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} hwif_prop;
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static ide_hwif_t *__devinit plat_ide_locate_hwif(void __iomem *base,
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void __iomem *ctrl, struct pata_platform_info *pdata, int irq,
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int mmio)
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{
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unsigned long port = (unsigned long)base;
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ide_hwif_t *hwif = ide_find_port(port);
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int i;
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if (hwif == NULL)
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goto out;
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hwif->io_ports[IDE_DATA_OFFSET] = port;
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port += (1 << pdata->ioport_shift);
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for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET;
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i++, port += (1 << pdata->ioport_shift))
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hwif->io_ports[i] = port;
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hwif->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
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hwif->irq = irq;
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hwif->chipset = ide_generic;
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if (mmio) {
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hwif->mmio = 1;
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default_hwif_mmiops(hwif);
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}
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hwif_prop.hwif = hwif;
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hwif_prop.index = hwif->index;
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out:
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return hwif;
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}
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static int __devinit plat_ide_probe(struct platform_device *pdev)
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{
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struct resource *res_base, *res_alt, *res_irq;
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ide_hwif_t *hwif;
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struct pata_platform_info *pdata;
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u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
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int ret = 0;
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int mmio = 0;
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pdata = pdev->dev.platform_data;
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/* get a pointer to the register memory */
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res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
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res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
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if (!res_base || !res_alt) {
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res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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if (!res_base || !res_alt) {
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ret = -ENOMEM;
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goto out;
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}
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mmio = 1;
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}
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res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res_irq) {
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ret = -EINVAL;
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goto out;
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}
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if (mmio) {
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hwif_prop.plat_ide_mapbase = devm_ioremap(&pdev->dev,
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res_base->start, res_base->end - res_base->start + 1);
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hwif_prop.plat_ide_alt_mapbase = devm_ioremap(&pdev->dev,
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res_alt->start, res_alt->end - res_alt->start + 1);
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} else {
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hwif_prop.plat_ide_mapbase = devm_ioport_map(&pdev->dev,
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res_base->start, res_base->end - res_base->start + 1);
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hwif_prop.plat_ide_alt_mapbase = devm_ioport_map(&pdev->dev,
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res_alt->start, res_alt->end - res_alt->start + 1);
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}
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hwif = plat_ide_locate_hwif(hwif_prop.plat_ide_mapbase,
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hwif_prop.plat_ide_alt_mapbase, pdata, res_irq->start, mmio);
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if (!hwif) {
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ret = -ENODEV;
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goto out;
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}
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hwif->gendev.parent = &pdev->dev;
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hwif->noprobe = 0;
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idx[0] = hwif->index;
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ide_device_add(idx);
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platform_set_drvdata(pdev, hwif);
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return 0;
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out:
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return ret;
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}
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static int __devexit plat_ide_remove(struct platform_device *pdev)
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{
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ide_hwif_t *hwif = pdev->dev.driver_data;
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if (hwif != hwif_prop.hwif) {
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dev_printk(KERN_DEBUG, &pdev->dev, "%s: hwif value error",
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pdev->name);
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} else {
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ide_unregister(hwif_prop.index);
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hwif_prop.index = 0;
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hwif_prop.hwif = NULL;
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}
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return 0;
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}
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static struct platform_driver platform_ide_driver = {
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.driver = {
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.name = "pata_platform",
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},
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.probe = plat_ide_probe,
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.remove = __devexit_p(plat_ide_remove),
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};
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static int __init platform_ide_init(void)
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{
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return platform_driver_register(&platform_ide_driver);
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}
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static void __exit platform_ide_exit(void)
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{
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platform_driver_unregister(&platform_ide_driver);
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}
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MODULE_DESCRIPTION("Platform IDE driver");
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MODULE_LICENSE("GPL");
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module_init(platform_ide_init);
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module_exit(platform_ide_exit);
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