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/io.h> 23 24static void __devinit plat_ide_setup_ports(struct ide_hw *hw, 25 void __iomem *base, 26 void __iomem *ctrl, 27 struct pata_platform_info *pdata, 28 int irq) 29{ 30 unsigned long port = (unsigned long)base; 31 int i; 32 33 hw->io_ports.data_addr = port; 34 35 port += (1 << pdata->ioport_shift); 36 for (i = 1; i <= 7; 37 i++, port += (1 << pdata->ioport_shift)) 38 hw->io_ports_array[i] = port; 39 40 hw->io_ports.ctl_addr = (unsigned long)ctrl; 41 42 hw->irq = irq; 43} 44 45static const struct ide_port_info platform_ide_port_info = { 46 .host_flags = IDE_HFLAG_NO_DMA, 47 .chipset = ide_generic, 48}; 49 50static int __devinit plat_ide_probe(struct platform_device *pdev) 51{ 52 struct resource *res_base, *res_alt, *res_irq; 53 void __iomem *base, *alt_base; 54 struct pata_platform_info *pdata; 55 struct ide_host *host; 56 int ret = 0, mmio = 0; 57 struct ide_hw hw, *hws[] = { &hw }; 58 struct ide_port_info d = platform_ide_port_info; 59 60 pdata = pdev->dev.platform_data; 61 62 /* get a pointer to the register memory */ 63 res_base = platform_get_resource(pdev, IORESOURCE_IO, 0); 64 res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1); 65 66 if (!res_base || !res_alt) { 67 res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); 68 res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1); 69 if (!res_base || !res_alt) { 70 ret = -ENOMEM; 71 goto out; 72 } 73 mmio = 1; 74 } 75 76 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 77 if (!res_irq) { 78 ret = -EINVAL; 79 goto out; 80 } 81 82 if (mmio) { 83 base = devm_ioremap(&pdev->dev, 84 res_base->start, resource_size(res_base)); 85 alt_base = devm_ioremap(&pdev->dev, 86 res_alt->start, resource_size(res_alt)); 87 } else { 88 base = devm_ioport_map(&pdev->dev, 89 res_base->start, resource_size(res_base)); 90 alt_base = devm_ioport_map(&pdev->dev, 91 res_alt->start, resource_size(res_alt)); 92 } 93 94 memset(&hw, 0, sizeof(hw)); 95 plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start); 96 hw.dev = &pdev->dev; 97 98 d.irq_flags = res_irq->flags; 99 if (mmio) 100 d.host_flags |= IDE_HFLAG_MMIO; 101 102 ret = ide_host_add(&d, hws, 1, &host); 103 if (ret) 104 goto out; 105 106 platform_set_drvdata(pdev, host); 107 108 return 0; 109 110out: 111 return ret; 112} 113 114static int __devexit plat_ide_remove(struct platform_device *pdev) 115{ 116 struct ide_host *host = dev_get_drvdata(&pdev->dev); 117 118 ide_host_remove(host); 119 120 return 0; 121} 122 123static struct platform_driver platform_ide_driver = { 124 .driver = { 125 .name = "pata_platform", 126 .owner = THIS_MODULE, 127 }, 128 .probe = plat_ide_probe, 129 .remove = __devexit_p(plat_ide_remove), 130}; 131 132static int __init platform_ide_init(void) 133{ 134 return platform_driver_register(&platform_ide_driver); 135} 136 137static void __exit platform_ide_exit(void) 138{ 139 platform_driver_unregister(&platform_ide_driver); 140} 141 142MODULE_DESCRIPTION("Platform IDE driver"); 143MODULE_LICENSE("GPL"); 144MODULE_ALIAS("platform:pata_platform"); 145 146module_init(platform_ide_init); 147module_exit(platform_ide_exit); 148