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8cb1f567 AV |
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 | ||
57c802e8 BZ |
24 | static void __devinit plat_ide_setup_ports(hw_regs_t *hw, |
25 | void __iomem *base, | |
26 | void __iomem *ctrl, | |
27 | struct pata_platform_info *pdata, | |
28 | int irq) | |
8cb1f567 AV |
29 | { |
30 | unsigned long port = (unsigned long)base; | |
baa8f3e9 | 31 | int i; |
8cb1f567 | 32 | |
57c802e8 | 33 | hw->io_ports[IDE_DATA_OFFSET] = port; |
8cb1f567 AV |
34 | |
35 | port += (1 << pdata->ioport_shift); | |
36 | for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET; | |
37 | i++, port += (1 << pdata->ioport_shift)) | |
57c802e8 | 38 | hw->io_ports[i] = port; |
8cb1f567 | 39 | |
57c802e8 | 40 | hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl; |
8cb1f567 | 41 | |
57c802e8 | 42 | hw->irq = irq; |
8cb1f567 | 43 | |
57c802e8 | 44 | hw->chipset = ide_generic; |
8cb1f567 AV |
45 | } |
46 | ||
47 | static int __devinit plat_ide_probe(struct platform_device *pdev) | |
48 | { | |
49 | struct resource *res_base, *res_alt, *res_irq; | |
04244937 | 50 | void __iomem *base, *alt_base; |
8cb1f567 AV |
51 | ide_hwif_t *hwif; |
52 | struct pata_platform_info *pdata; | |
8447d9d5 | 53 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
8cb1f567 AV |
54 | int ret = 0; |
55 | int mmio = 0; | |
57c802e8 | 56 | hw_regs_t hw; |
8cb1f567 AV |
57 | |
58 | pdata = pdev->dev.platform_data; | |
59 | ||
60 | /* get a pointer to the register memory */ | |
61 | res_base = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
62 | res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1); | |
63 | ||
64 | if (!res_base || !res_alt) { | |
65 | res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
66 | res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
67 | if (!res_base || !res_alt) { | |
68 | ret = -ENOMEM; | |
69 | goto out; | |
70 | } | |
71 | mmio = 1; | |
72 | } | |
73 | ||
74 | res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
75 | if (!res_irq) { | |
76 | ret = -EINVAL; | |
77 | goto out; | |
78 | } | |
79 | ||
80 | if (mmio) { | |
04244937 | 81 | base = devm_ioremap(&pdev->dev, |
8cb1f567 | 82 | res_base->start, res_base->end - res_base->start + 1); |
04244937 | 83 | alt_base = devm_ioremap(&pdev->dev, |
8cb1f567 AV |
84 | res_alt->start, res_alt->end - res_alt->start + 1); |
85 | } else { | |
04244937 | 86 | base = devm_ioport_map(&pdev->dev, |
8cb1f567 | 87 | res_base->start, res_base->end - res_base->start + 1); |
04244937 | 88 | alt_base = devm_ioport_map(&pdev->dev, |
8cb1f567 AV |
89 | res_alt->start, res_alt->end - res_alt->start + 1); |
90 | } | |
91 | ||
04244937 | 92 | hwif = ide_find_port((unsigned long)base); |
8cb1f567 AV |
93 | if (!hwif) { |
94 | ret = -ENODEV; | |
95 | goto out; | |
96 | } | |
57c802e8 BZ |
97 | |
98 | memset(&hw, 0, sizeof(hw)); | |
04244937 | 99 | plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start); |
57c802e8 BZ |
100 | hw.dev = &pdev->dev; |
101 | ||
102 | ide_init_port_hw(hwif, &hw); | |
103 | ||
104 | if (mmio) { | |
105 | hwif->mmio = 1; | |
106 | default_hwif_mmiops(hwif); | |
107 | } | |
108 | ||
8447d9d5 BZ |
109 | idx[0] = hwif->index; |
110 | ||
c413b9b9 | 111 | ide_device_add(idx, NULL); |
8cb1f567 AV |
112 | |
113 | platform_set_drvdata(pdev, hwif); | |
8cb1f567 AV |
114 | |
115 | return 0; | |
116 | ||
117 | out: | |
118 | return ret; | |
119 | } | |
120 | ||
121 | static int __devexit plat_ide_remove(struct platform_device *pdev) | |
122 | { | |
123 | ide_hwif_t *hwif = pdev->dev.driver_data; | |
124 | ||
909f4369 | 125 | ide_unregister(hwif->index, 0, 0); |
8cb1f567 AV |
126 | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static struct platform_driver platform_ide_driver = { | |
131 | .driver = { | |
132 | .name = "pata_platform", | |
133 | }, | |
134 | .probe = plat_ide_probe, | |
135 | .remove = __devexit_p(plat_ide_remove), | |
136 | }; | |
137 | ||
138 | static int __init platform_ide_init(void) | |
139 | { | |
140 | return platform_driver_register(&platform_ide_driver); | |
141 | } | |
142 | ||
143 | static void __exit platform_ide_exit(void) | |
144 | { | |
145 | platform_driver_unregister(&platform_ide_driver); | |
146 | } | |
147 | ||
148 | MODULE_DESCRIPTION("Platform IDE driver"); | |
149 | MODULE_LICENSE("GPL"); | |
150 | ||
151 | module_init(platform_ide_init); | |
152 | module_exit(platform_ide_exit); |