Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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/ata_platform.h>
21#include <linux/platform_device.h>
22#include <linux/io.h>
23
24static void __devinit plat_ide_setup_ports(struct ide_hw *hw,
25 void __iomem *base,
26 void __iomem *ctrl,
27 struct pata_platform_info *pdata,
28 int irq)
29{
30 unsigned long port = (unsigned long)base;
31 int i;
32
33 hw->io_ports.data_addr = port;
34
35 port += (1 << pdata->ioport_shift);
36 for (i = 1; i <= 7;
37 i++, port += (1 << pdata->ioport_shift))
38 hw->io_ports_array[i] = port;
39
40 hw->io_ports.ctl_addr = (unsigned long)ctrl;
41
42 hw->irq = irq;
43}
44
45static const struct ide_port_info platform_ide_port_info = {
46 .host_flags = IDE_HFLAG_NO_DMA,
47 .chipset = ide_generic,
48};
49
50static int __devinit plat_ide_probe(struct platform_device *pdev)
51{
52 struct resource *res_base, *res_alt, *res_irq;
53 void __iomem *base, *alt_base;
54 struct pata_platform_info *pdata;
55 struct ide_host *host;
56 int ret = 0, mmio = 0;
57 struct ide_hw hw, *hws[] = { &hw };
58 struct ide_port_info d = platform_ide_port_info;
59
60 pdata = pdev->dev.platform_data;
61
62 /* get a pointer to the register memory */
63 res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
64 res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
65
66 if (!res_base || !res_alt) {
67 res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
68 res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
69 if (!res_base || !res_alt) {
70 ret = -ENOMEM;
71 goto out;
72 }
73 mmio = 1;
74 }
75
76 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
77 if (!res_irq) {
78 ret = -EINVAL;
79 goto out;
80 }
81
82 if (mmio) {
83 base = devm_ioremap(&pdev->dev,
84 res_base->start, res_base->end - res_base->start + 1);
85 alt_base = devm_ioremap(&pdev->dev,
86 res_alt->start, res_alt->end - res_alt->start + 1);
87 } else {
88 base = devm_ioport_map(&pdev->dev,
89 res_base->start, res_base->end - res_base->start + 1);
90 alt_base = devm_ioport_map(&pdev->dev,
91 res_alt->start, res_alt->end - res_alt->start + 1);
92 }
93
94 memset(&hw, 0, sizeof(hw));
95 plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
96 hw.dev = &pdev->dev;
97
98 if (mmio)
99 d.host_flags |= IDE_HFLAG_MMIO;
100
101 ret = ide_host_add(&d, hws, 1, &host);
102 if (ret)
103 goto out;
104
105 platform_set_drvdata(pdev, host);
106
107 return 0;
108
109out:
110 return ret;
111}
112
113static int __devexit plat_ide_remove(struct platform_device *pdev)
114{
115 struct ide_host *host = dev_get_drvdata(&pdev->dev);
116
117 ide_host_remove(host);
118
119 return 0;
120}
121
122static struct platform_driver platform_ide_driver = {
123 .driver = {
124 .name = "pata_platform",
125 .owner = THIS_MODULE,
126 },
127 .probe = plat_ide_probe,
128 .remove = __devexit_p(plat_ide_remove),
129};
130
131static int __init platform_ide_init(void)
132{
133 return platform_driver_register(&platform_ide_driver);
134}
135
136static void __exit platform_ide_exit(void)
137{
138 platform_driver_unregister(&platform_ide_driver);
139}
140
141MODULE_DESCRIPTION("Platform IDE driver");
142MODULE_LICENSE("GPL");
143MODULE_ALIAS("platform:pata_platform");
144
145module_init(platform_ide_init);
146module_exit(platform_ide_exit);