tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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(hw_regs_t *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 hw->chipset = ide_generic;
45}
46
47static int __devinit plat_ide_probe(struct platform_device *pdev)
48{
49 struct resource *res_base, *res_alt, *res_irq;
50 void __iomem *base, *alt_base;
51 ide_hwif_t *hwif;
52 struct pata_platform_info *pdata;
53 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
54 int ret = 0;
55 int mmio = 0;
56 hw_regs_t hw;
57
58 pdata = pdev->dev.platform_data;
59
60 /* get a pointer to the register memory */
61 res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
62 res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
63
64 if (!res_base || !res_alt) {
65 res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
66 res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
67 if (!res_base || !res_alt) {
68 ret = -ENOMEM;
69 goto out;
70 }
71 mmio = 1;
72 }
73
74 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
75 if (!res_irq) {
76 ret = -EINVAL;
77 goto out;
78 }
79
80 if (mmio) {
81 base = devm_ioremap(&pdev->dev,
82 res_base->start, res_base->end - res_base->start + 1);
83 alt_base = devm_ioremap(&pdev->dev,
84 res_alt->start, res_alt->end - res_alt->start + 1);
85 } else {
86 base = devm_ioport_map(&pdev->dev,
87 res_base->start, res_base->end - res_base->start + 1);
88 alt_base = devm_ioport_map(&pdev->dev,
89 res_alt->start, res_alt->end - res_alt->start + 1);
90 }
91
92 hwif = ide_find_port();
93 if (!hwif) {
94 ret = -ENODEV;
95 goto out;
96 }
97
98 memset(&hw, 0, sizeof(hw));
99 plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
100 hw.dev = &pdev->dev;
101
102 ide_init_port_hw(hwif, &hw);
103
104 if (mmio) {
105 hwif->host_flags = IDE_HFLAG_MMIO;
106 default_hwif_mmiops(hwif);
107 }
108
109 idx[0] = hwif->index;
110
111 ide_device_add(idx, NULL);
112
113 platform_set_drvdata(pdev, hwif);
114
115 return 0;
116
117out:
118 return ret;
119}
120
121static int __devexit plat_ide_remove(struct platform_device *pdev)
122{
123 ide_hwif_t *hwif = pdev->dev.driver_data;
124
125 ide_unregister(hwif);
126
127 return 0;
128}
129
130static struct platform_driver platform_ide_driver = {
131 .driver = {
132 .name = "pata_platform",
133 .owner = THIS_MODULE,
134 },
135 .probe = plat_ide_probe,
136 .remove = __devexit_p(plat_ide_remove),
137};
138
139static int __init platform_ide_init(void)
140{
141 return platform_driver_register(&platform_ide_driver);
142}
143
144static void __exit platform_ide_exit(void)
145{
146 platform_driver_unregister(&platform_ide_driver);
147}
148
149MODULE_DESCRIPTION("Platform IDE driver");
150MODULE_LICENSE("GPL");
151MODULE_ALIAS("platform:pata_platform");
152
153module_init(platform_ide_init);
154module_exit(platform_ide_exit);