/* * 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/ata_platform.h> #include <linux/platform_device.h> #include <linux/io.h> static void __devinit plat_ide_setup_ports(hw_regs_t *hw, void __iomem *base, void __iomem *ctrl, struct pata_platform_info *pdata, int irq) { unsigned long port = (unsigned long)base; int i; 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)) hw->io_ports[i] = port; hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl; hw->irq = irq; hw->chipset = ide_generic; } static int __devinit plat_ide_probe(struct platform_device *pdev) { struct resource *res_base, *res_alt, *res_irq; void __iomem *base, *alt_base; ide_hwif_t *hwif; struct pata_platform_info *pdata; u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; int ret = 0; int mmio = 0; hw_regs_t hw; 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) { base = devm_ioremap(&pdev->dev, res_base->start, res_base->end - res_base->start + 1); alt_base = devm_ioremap(&pdev->dev, res_alt->start, res_alt->end - res_alt->start + 1); } else { base = devm_ioport_map(&pdev->dev, res_base->start, res_base->end - res_base->start + 1); alt_base = devm_ioport_map(&pdev->dev, res_alt->start, res_alt->end - res_alt->start + 1); } hwif = ide_find_port((unsigned long)base); if (!hwif) { ret = -ENODEV; goto out; } memset(&hw, 0, sizeof(hw)); plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start); hw.dev = &pdev->dev; ide_init_port_hw(hwif, &hw); if (mmio) { hwif->mmio = 1; default_hwif_mmiops(hwif); } idx[0] = hwif->index; ide_device_add(idx, NULL); 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; ide_unregister(hwif->index, 0, 0); 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);