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
|
/*
* 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/ata_platform.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/io.h>
static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base,
void __iomem *ctrl,
struct pata_platform_info *pdata, int irq)
{
unsigned long port = (unsigned long)base;
int i;
hw->io_ports.data_addr = port;
port += (1 << pdata->ioport_shift);
for (i = 1; i <= 7;
i++, port += (1 << pdata->ioport_shift))
hw->io_ports_array[i] = port;
hw->io_ports.ctl_addr = (unsigned long)ctrl;
hw->irq = irq;
}
static const struct ide_port_info platform_ide_port_info = {
.host_flags = IDE_HFLAG_NO_DMA,
.chipset = ide_generic,
};
static int plat_ide_probe(struct platform_device *pdev)
{
struct resource *res_base, *res_alt, *res_irq;
void __iomem *base, *alt_base;
struct pata_platform_info *pdata;
struct ide_host *host;
int ret = 0, mmio = 0;
struct ide_hw hw, *hws[] = { &hw };
struct ide_port_info d = platform_ide_port_info;
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) {
base = devm_ioremap(&pdev->dev,
res_base->start, resource_size(res_base));
alt_base = devm_ioremap(&pdev->dev,
res_alt->start, resource_size(res_alt));
} else {
base = devm_ioport_map(&pdev->dev,
res_base->start, resource_size(res_base));
alt_base = devm_ioport_map(&pdev->dev,
res_alt->start, resource_size(res_alt));
}
memset(&hw, 0, sizeof(hw));
plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
hw.dev = &pdev->dev;
d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
d.irq_flags |= IRQF_SHARED;
if (mmio)
d.host_flags |= IDE_HFLAG_MMIO;
ret = ide_host_add(&d, hws, 1, &host);
if (ret)
goto out;
platform_set_drvdata(pdev, host);
return 0;
out:
return ret;
}
static int plat_ide_remove(struct platform_device *pdev)
{
struct ide_host *host = dev_get_drvdata(&pdev->dev);
ide_host_remove(host);
return 0;
}
static struct platform_driver platform_ide_driver = {
.driver = {
.name = "pata_platform",
.owner = THIS_MODULE,
},
.probe = plat_ide_probe,
.remove = 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_ALIAS("platform:pata_platform");
module_init(platform_ide_init);
module_exit(platform_ide_exit);
|
