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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> | |
37210fbe | 14 | #include <linux/of_address.h> |
d0643aa1 | 15 | #include <linux/platform_device.h> |
0a87e3e9 | 16 | #include <linux/ata_platform.h> |
84043ac2 | 17 | #include <linux/libata.h> |
61f71621 | 18 | |
0ec24914 | 19 | static int pata_of_platform_probe(struct platform_device *ofdev) |
61f71621 AV |
20 | { |
21 | int ret; | |
61c7a080 | 22 | struct device_node *dn = ofdev->dev.of_node; |
61f71621 AV |
23 | struct resource io_res; |
24 | struct resource ctl_res; | |
d0643aa1 | 25 | struct resource *irq_res; |
61f71621 AV |
26 | unsigned int reg_shift = 0; |
27 | int pio_mode = 0; | |
28 | int pio_mask; | |
29 | const u32 *prop; | |
30 | ||
31 | ret = of_address_to_resource(dn, 0, &io_res); | |
32 | if (ret) { | |
33 | dev_err(&ofdev->dev, "can't get IO address from " | |
34 | "device tree\n"); | |
35 | return -EINVAL; | |
36 | } | |
37 | ||
ca99140a AS |
38 | ret = of_address_to_resource(dn, 1, &ctl_res); |
39 | if (ret) { | |
40 | dev_err(&ofdev->dev, "can't get CTL address from " | |
41 | "device tree\n"); | |
42 | return -EINVAL; | |
61f71621 AV |
43 | } |
44 | ||
d0643aa1 | 45 | irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0); |
61f71621 AV |
46 | |
47 | prop = of_get_property(dn, "reg-shift", NULL); | |
48 | if (prop) | |
37210fbe | 49 | reg_shift = be32_to_cpup(prop); |
61f71621 AV |
50 | |
51 | prop = of_get_property(dn, "pio-mode", NULL); | |
52 | if (prop) { | |
37210fbe | 53 | pio_mode = be32_to_cpup(prop); |
61f71621 AV |
54 | if (pio_mode > 6) { |
55 | dev_err(&ofdev->dev, "invalid pio-mode\n"); | |
56 | return -EINVAL; | |
57 | } | |
58 | } else { | |
59 | dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); | |
60 | } | |
61 | ||
62 | pio_mask = 1 << pio_mode; | |
63 | pio_mask |= (1 << pio_mode) - 1; | |
64 | ||
d0643aa1 | 65 | return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res, |
61f71621 AV |
66 | reg_shift, pio_mask); |
67 | } | |
68 | ||
61f71621 AV |
69 | static struct of_device_id pata_of_platform_match[] = { |
70 | { .compatible = "ata-generic", }, | |
ca99140a | 71 | { }, |
61f71621 AV |
72 | }; |
73 | MODULE_DEVICE_TABLE(of, pata_of_platform_match); | |
74 | ||
1c48a5c9 | 75 | static struct platform_driver pata_of_platform_driver = { |
4018294b GL |
76 | .driver = { |
77 | .name = "pata_of_platform", | |
4018294b GL |
78 | .of_match_table = pata_of_platform_match, |
79 | }, | |
61f71621 | 80 | .probe = pata_of_platform_probe, |
3e7068da | 81 | .remove = ata_platform_remove_one, |
61f71621 AV |
82 | }; |
83 | ||
99c8ea3e | 84 | module_platform_driver(pata_of_platform_driver); |
61f71621 AV |
85 | |
86 | MODULE_DESCRIPTION("OF-platform PATA driver"); | |
87 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
88 | MODULE_LICENSE("GPL"); |