1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* Platform IDE driver
*
* Copyright (C) 2007 MontaVista Software
*
* Maintainer: Kumar Gala <galak@kernel.crashing.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/ide.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/pata_platform.h>
#include <linux/platform_device.h>
#include <linux/io.h>
static struct {
void __iomem *plat_ide_mapbase;
void __iomem *plat_ide_alt_mapbase;
ide_hwif_t *hwif;
int index;
} hwif_prop;
static ide_hwif_t *__devinit plat_ide_locate_hwif(void __iomem *base,
void __iomem *ctrl, struct pata_platform_info *pdata, int irq,
int mmio)
{
unsigned long port = (unsigned long)base;
ide_hwif_t *hwif = ide_find_port(port);
int i;
if (hwif == NULL)
goto out;
hwif->hw.io_ports[IDE_DATA_OFFSET] = port;
port += (1 << pdata->ioport_shift);
for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET;
i++, port += (1 << pdata->ioport_shift))
hwif->hw.io_ports[i] = port;
hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
hwif->hw.irq = hwif->irq = irq;
hwif->hw.dma = NO_DMA;
hwif->chipset = hwif->hw.chipset = ide_generic;
if (mmio) {
hwif->mmio = 1;
default_hwif_mmiops(hwif);
}
hwif_prop.hwif = hwif;
hwif_prop.index = hwif->index;
out:
return hwif;
}
static int __devinit plat_ide_probe(struct platform_device *pdev)
{
struct resource *res_base, *res_alt, *res_irq;
ide_hwif_t *hwif;
struct pata_platform_info *pdata;
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
int ret = 0;
int mmio = 0;
pdata = pdev->dev.platform_data;
/* get a pointer to the register memory */
res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
if (!res_base || !res_alt) {
res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res_base || !res_alt) {
ret = -ENOMEM;
goto out;
}
mmio = 1;
}
res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res_irq) {
ret = -EINVAL;
goto out;
}
if (mmio) {
hwif_prop.plat_ide_mapbase = devm_ioremap(&pdev->dev,
res_base->start, res_base->end - res_base->start + 1);
hwif_prop.plat_ide_alt_mapbase = devm_ioremap(&pdev->dev,
res_alt->start, res_alt->end - res_alt->start + 1);
} else {
hwif_prop.plat_ide_mapbase = devm_ioport_map(&pdev->dev,
res_base->start, res_base->end - res_base->start + 1);
hwif_prop.plat_ide_alt_mapbase = devm_ioport_map(&pdev->dev,
res_alt->start, res_alt->end - res_alt->start + 1);
}
hwif = plat_ide_locate_hwif(hwif_prop.plat_ide_mapbase,
hwif_prop.plat_ide_alt_mapbase, pdata, res_irq->start, mmio);
if (!hwif) {
ret = -ENODEV;
goto out;
}
hwif->gendev.parent = &pdev->dev;
hwif->noprobe = 0;
idx[0] = hwif->index;
ide_device_add(idx);
platform_set_drvdata(pdev, hwif);
return 0;
out:
return ret;
}
static int __devexit plat_ide_remove(struct platform_device *pdev)
{
ide_hwif_t *hwif = pdev->dev.driver_data;
if (hwif != hwif_prop.hwif) {
dev_printk(KERN_DEBUG, &pdev->dev, "%s: hwif value error",
pdev->name);
} else {
ide_unregister(hwif_prop.index);
hwif_prop.index = 0;
hwif_prop.hwif = NULL;
}
return 0;
}
static struct platform_driver platform_ide_driver = {
.driver = {
.name = "pata_platform",
},
.probe = plat_ide_probe,
.remove = __devexit_p(plat_ide_remove),
};
static int __init platform_ide_init(void)
{
return platform_driver_register(&platform_ide_driver);
}
static void __exit platform_ide_exit(void)
{
platform_driver_unregister(&platform_ide_driver);
}
MODULE_DESCRIPTION("Platform IDE driver");
MODULE_LICENSE("GPL");
module_init(platform_ide_init);
module_exit(platform_ide_exit);
|
