153 lines
3.4 KiB
C
153 lines
3.4 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/ata_platform.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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static void __devinit plat_ide_setup_ports(hw_regs_t *hw,
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void __iomem *base,
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void __iomem *ctrl,
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struct pata_platform_info *pdata,
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int irq)
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{
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unsigned long port = (unsigned long)base;
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int i;
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hw->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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hw->io_ports[i] = port;
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hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
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hw->irq = irq;
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hw->chipset = ide_generic;
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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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void __iomem *base, *alt_base;
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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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hw_regs_t hw;
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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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base = devm_ioremap(&pdev->dev,
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res_base->start, res_base->end - res_base->start + 1);
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alt_base = 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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base = devm_ioport_map(&pdev->dev,
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res_base->start, res_base->end - res_base->start + 1);
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alt_base = 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 = ide_find_port((unsigned long)base);
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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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memset(&hw, 0, sizeof(hw));
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plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
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hw.dev = &pdev->dev;
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ide_init_port_hw(hwif, &hw);
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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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idx[0] = hwif->index;
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ide_device_add(idx, NULL);
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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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ide_unregister(hwif->index, 0, 0);
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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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