Anton Vorontsov | 8cb1f56 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 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/pata_platform.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/io.h> |
| 23 | |
| 24 | static struct { |
| 25 | void __iomem *plat_ide_mapbase; |
| 26 | void __iomem *plat_ide_alt_mapbase; |
| 27 | ide_hwif_t *hwif; |
| 28 | int index; |
| 29 | } hwif_prop; |
| 30 | |
| 31 | static ide_hwif_t *__devinit plat_ide_locate_hwif(void __iomem *base, |
| 32 | void __iomem *ctrl, struct pata_platform_info *pdata, int irq, |
| 33 | int mmio) |
| 34 | { |
| 35 | unsigned long port = (unsigned long)base; |
| 36 | ide_hwif_t *hwif; |
| 37 | int index, i; |
| 38 | |
| 39 | for (index = 0; index < MAX_HWIFS; ++index) { |
| 40 | hwif = ide_hwifs + index; |
| 41 | if (hwif->io_ports[IDE_DATA_OFFSET] == port) |
| 42 | goto found; |
| 43 | } |
| 44 | |
| 45 | for (index = 0; index < MAX_HWIFS; ++index) { |
| 46 | hwif = ide_hwifs + index; |
| 47 | if (hwif->io_ports[IDE_DATA_OFFSET] == 0) |
| 48 | goto found; |
| 49 | } |
| 50 | |
| 51 | return NULL; |
| 52 | |
| 53 | found: |
| 54 | |
| 55 | hwif->hw.io_ports[IDE_DATA_OFFSET] = port; |
| 56 | |
| 57 | port += (1 << pdata->ioport_shift); |
| 58 | for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET; |
| 59 | i++, port += (1 << pdata->ioport_shift)) |
| 60 | hwif->hw.io_ports[i] = port; |
| 61 | |
| 62 | hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl; |
| 63 | |
| 64 | memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); |
| 65 | hwif->hw.irq = hwif->irq = irq; |
| 66 | |
| 67 | hwif->hw.dma = NO_DMA; |
Bartlomiej Zolnierkiewicz | ceec182 | 2007-10-13 17:47:47 +0200 | [diff] [blame] | 68 | hwif->chipset = hwif->hw.chipset = ide_generic; |
Anton Vorontsov | 8cb1f56 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 69 | |
| 70 | if (mmio) { |
| 71 | hwif->mmio = 1; |
| 72 | default_hwif_mmiops(hwif); |
| 73 | } |
| 74 | |
| 75 | hwif_prop.hwif = hwif; |
| 76 | hwif_prop.index = index; |
| 77 | |
| 78 | return hwif; |
| 79 | } |
| 80 | |
| 81 | static int __devinit plat_ide_probe(struct platform_device *pdev) |
| 82 | { |
| 83 | struct resource *res_base, *res_alt, *res_irq; |
| 84 | ide_hwif_t *hwif; |
| 85 | struct pata_platform_info *pdata; |
| 86 | int ret = 0; |
| 87 | int mmio = 0; |
| 88 | |
| 89 | pdata = pdev->dev.platform_data; |
| 90 | |
| 91 | /* get a pointer to the register memory */ |
| 92 | res_base = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 93 | res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1); |
| 94 | |
| 95 | if (!res_base || !res_alt) { |
| 96 | res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 97 | res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| 98 | if (!res_base || !res_alt) { |
| 99 | ret = -ENOMEM; |
| 100 | goto out; |
| 101 | } |
| 102 | mmio = 1; |
| 103 | } |
| 104 | |
| 105 | res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 106 | if (!res_irq) { |
| 107 | ret = -EINVAL; |
| 108 | goto out; |
| 109 | } |
| 110 | |
| 111 | if (mmio) { |
| 112 | hwif_prop.plat_ide_mapbase = devm_ioremap(&pdev->dev, |
| 113 | res_base->start, res_base->end - res_base->start + 1); |
| 114 | hwif_prop.plat_ide_alt_mapbase = devm_ioremap(&pdev->dev, |
| 115 | res_alt->start, res_alt->end - res_alt->start + 1); |
| 116 | } else { |
| 117 | hwif_prop.plat_ide_mapbase = devm_ioport_map(&pdev->dev, |
| 118 | res_base->start, res_base->end - res_base->start + 1); |
| 119 | hwif_prop.plat_ide_alt_mapbase = devm_ioport_map(&pdev->dev, |
| 120 | res_alt->start, res_alt->end - res_alt->start + 1); |
| 121 | } |
| 122 | |
| 123 | hwif = plat_ide_locate_hwif(hwif_prop.plat_ide_mapbase, |
| 124 | hwif_prop.plat_ide_alt_mapbase, pdata, res_irq->start, mmio); |
| 125 | |
| 126 | if (!hwif) { |
| 127 | ret = -ENODEV; |
| 128 | goto out; |
| 129 | } |
| 130 | hwif->gendev.parent = &pdev->dev; |
| 131 | hwif->noprobe = 0; |
| 132 | |
| 133 | probe_hwif_init(hwif); |
| 134 | |
| 135 | platform_set_drvdata(pdev, hwif); |
| 136 | ide_proc_register_port(hwif); |
| 137 | |
| 138 | return 0; |
| 139 | |
| 140 | out: |
| 141 | return ret; |
| 142 | } |
| 143 | |
| 144 | static int __devexit plat_ide_remove(struct platform_device *pdev) |
| 145 | { |
| 146 | ide_hwif_t *hwif = pdev->dev.driver_data; |
| 147 | |
| 148 | if (hwif != hwif_prop.hwif) { |
| 149 | dev_printk(KERN_DEBUG, &pdev->dev, "%s: hwif value error", |
| 150 | pdev->name); |
| 151 | } else { |
| 152 | ide_unregister(hwif_prop.index); |
| 153 | hwif_prop.index = 0; |
| 154 | hwif_prop.hwif = NULL; |
| 155 | } |
| 156 | |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static struct platform_driver platform_ide_driver = { |
| 161 | .driver = { |
| 162 | .name = "pata_platform", |
| 163 | }, |
| 164 | .probe = plat_ide_probe, |
| 165 | .remove = __devexit_p(plat_ide_remove), |
| 166 | }; |
| 167 | |
| 168 | static int __init platform_ide_init(void) |
| 169 | { |
| 170 | return platform_driver_register(&platform_ide_driver); |
| 171 | } |
| 172 | |
| 173 | static void __exit platform_ide_exit(void) |
| 174 | { |
| 175 | platform_driver_unregister(&platform_ide_driver); |
| 176 | } |
| 177 | |
| 178 | MODULE_DESCRIPTION("Platform IDE driver"); |
| 179 | MODULE_LICENSE("GPL"); |
| 180 | |
| 181 | module_init(platform_ide_init); |
| 182 | module_exit(platform_ide_exit); |