4 * Copyright (C) 2007 MontaVista Software
6 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
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.
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>
25 void __iomem *plat_ide_mapbase;
26 void __iomem *plat_ide_alt_mapbase;
31 static ide_hwif_t *__devinit plat_ide_locate_hwif(void __iomem *base,
32 void __iomem *ctrl, struct pata_platform_info *pdata, int irq,
35 unsigned long port = (unsigned long)base;
39 for (index = 0; index < MAX_HWIFS; ++index) {
40 hwif = ide_hwifs + index;
41 if (hwif->io_ports[IDE_DATA_OFFSET] == port)
45 for (index = 0; index < MAX_HWIFS; ++index) {
46 hwif = ide_hwifs + index;
47 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
55 hwif->hw.io_ports[IDE_DATA_OFFSET] = port;
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;
62 hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
64 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
65 hwif->hw.irq = hwif->irq = irq;
67 hwif->hw.dma = NO_DMA;
68 hwif->chipset = hwif->hw.chipset = ide_generic;
72 default_hwif_mmiops(hwif);
75 hwif_prop.hwif = hwif;
76 hwif_prop.index = index;
81 static int __devinit plat_ide_probe(struct platform_device *pdev)
83 struct resource *res_base, *res_alt, *res_irq;
85 struct pata_platform_info *pdata;
86 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
90 pdata = pdev->dev.platform_data;
92 /* get a pointer to the register memory */
93 res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
94 res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
96 if (!res_base || !res_alt) {
97 res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
98 res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
99 if (!res_base || !res_alt) {
106 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
113 hwif_prop.plat_ide_mapbase = devm_ioremap(&pdev->dev,
114 res_base->start, res_base->end - res_base->start + 1);
115 hwif_prop.plat_ide_alt_mapbase = devm_ioremap(&pdev->dev,
116 res_alt->start, res_alt->end - res_alt->start + 1);
118 hwif_prop.plat_ide_mapbase = devm_ioport_map(&pdev->dev,
119 res_base->start, res_base->end - res_base->start + 1);
120 hwif_prop.plat_ide_alt_mapbase = devm_ioport_map(&pdev->dev,
121 res_alt->start, res_alt->end - res_alt->start + 1);
124 hwif = plat_ide_locate_hwif(hwif_prop.plat_ide_mapbase,
125 hwif_prop.plat_ide_alt_mapbase, pdata, res_irq->start, mmio);
131 hwif->gendev.parent = &pdev->dev;
134 idx[0] = hwif->index;
138 platform_set_drvdata(pdev, hwif);
146 static int __devexit plat_ide_remove(struct platform_device *pdev)
148 ide_hwif_t *hwif = pdev->dev.driver_data;
150 if (hwif != hwif_prop.hwif) {
151 dev_printk(KERN_DEBUG, &pdev->dev, "%s: hwif value error",
154 ide_unregister(hwif_prop.index);
156 hwif_prop.hwif = NULL;
162 static struct platform_driver platform_ide_driver = {
164 .name = "pata_platform",
166 .probe = plat_ide_probe,
167 .remove = __devexit_p(plat_ide_remove),
170 static int __init platform_ide_init(void)
172 return platform_driver_register(&platform_ide_driver);
175 static void __exit platform_ide_exit(void)
177 platform_driver_unregister(&platform_ide_driver);
180 MODULE_DESCRIPTION("Platform IDE driver");
181 MODULE_LICENSE("GPL");
183 module_init(platform_ide_init);
184 module_exit(platform_ide_exit);