]>
Commit | Line | Data |
---|---|---|
61f71621 AV |
1 | /* |
2 | * OF-platform PATA driver | |
3 | * | |
4 | * Copyright (c) 2007 MontaVista Software, Inc. | |
5 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License (Version 2) as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/of_platform.h> | |
15 | #include <linux/pata_platform.h> | |
16 | ||
17 | static int __devinit pata_of_platform_probe(struct of_device *ofdev, | |
18 | const struct of_device_id *match) | |
19 | { | |
20 | int ret; | |
21 | struct device_node *dn = ofdev->node; | |
22 | struct resource io_res; | |
23 | struct resource ctl_res; | |
24 | struct resource irq_res; | |
25 | unsigned int reg_shift = 0; | |
26 | int pio_mode = 0; | |
27 | int pio_mask; | |
28 | const u32 *prop; | |
29 | ||
30 | ret = of_address_to_resource(dn, 0, &io_res); | |
31 | if (ret) { | |
32 | dev_err(&ofdev->dev, "can't get IO address from " | |
33 | "device tree\n"); | |
34 | return -EINVAL; | |
35 | } | |
36 | ||
37 | ret = of_address_to_resource(dn, 1, &ctl_res); | |
38 | if (ret) { | |
39 | dev_err(&ofdev->dev, "can't get CTL address from " | |
40 | "device tree\n"); | |
41 | return -EINVAL; | |
42 | } | |
43 | ||
44 | ret = of_irq_to_resource(dn, 0, &irq_res); | |
45 | if (ret == NO_IRQ) | |
46 | irq_res.start = irq_res.end = -1; | |
47 | else | |
48 | irq_res.flags = 0; | |
49 | ||
50 | prop = of_get_property(dn, "reg-shift", NULL); | |
51 | if (prop) | |
52 | reg_shift = *prop; | |
53 | ||
54 | prop = of_get_property(dn, "pio-mode", NULL); | |
55 | if (prop) { | |
56 | pio_mode = *prop; | |
57 | if (pio_mode > 6) { | |
58 | dev_err(&ofdev->dev, "invalid pio-mode\n"); | |
59 | return -EINVAL; | |
60 | } | |
61 | } else { | |
62 | dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); | |
63 | } | |
64 | ||
65 | pio_mask = 1 << pio_mode; | |
66 | pio_mask |= (1 << pio_mode) - 1; | |
67 | ||
68 | return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, &irq_res, | |
69 | reg_shift, pio_mask); | |
70 | } | |
71 | ||
72 | static int __devexit pata_of_platform_remove(struct of_device *ofdev) | |
73 | { | |
74 | return __pata_platform_remove(&ofdev->dev); | |
75 | } | |
76 | ||
77 | static struct of_device_id pata_of_platform_match[] = { | |
78 | { .compatible = "ata-generic", }, | |
79 | {}, | |
80 | }; | |
81 | MODULE_DEVICE_TABLE(of, pata_of_platform_match); | |
82 | ||
83 | static struct of_platform_driver pata_of_platform_driver = { | |
84 | .name = "pata_of_platform", | |
85 | .match_table = pata_of_platform_match, | |
86 | .probe = pata_of_platform_probe, | |
87 | .remove = __devexit_p(pata_of_platform_remove), | |
88 | }; | |
89 | ||
90 | static int __init pata_of_platform_init(void) | |
91 | { | |
92 | return of_register_platform_driver(&pata_of_platform_driver); | |
93 | } | |
94 | module_init(pata_of_platform_init); | |
95 | ||
96 | static void __exit pata_of_platform_exit(void) | |
97 | { | |
98 | of_unregister_platform_driver(&pata_of_platform_driver); | |
99 | } | |
100 | module_exit(pata_of_platform_exit); | |
101 | ||
102 | MODULE_DESCRIPTION("OF-platform PATA driver"); | |
103 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
104 | MODULE_LICENSE("GPL"); |