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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 | ||
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; | |
68 | hwif->hw.chipset = ide_generic; | |
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); |