blob: b992b2b91fe2ba684dadbc7345ffb96d4161f8bc [file] [log] [blame]
Anton Vorontsov8cb1f562007-10-11 23:53:58 +02001/*
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
24static 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
31static 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
53found:
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 Zolnierkiewiczceec1822007-10-13 17:47:47 +020068 hwif->chipset = hwif->hw.chipset = ide_generic;
Anton Vorontsov8cb1f562007-10-11 23:53:58 +020069
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
81static 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
140out:
141 return ret;
142}
143
144static 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
160static 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
168static int __init platform_ide_init(void)
169{
170 return platform_driver_register(&platform_ide_driver);
171}
172
173static void __exit platform_ide_exit(void)
174{
175 platform_driver_unregister(&platform_ide_driver);
176}
177
178MODULE_DESCRIPTION("Platform IDE driver");
179MODULE_LICENSE("GPL");
180
181module_init(platform_ide_init);
182module_exit(platform_ide_exit);