git://bbs.cooldavid.org / net-next-2.6.git / blame
| 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> | |
| 0a87e3e9 | 15 | #include <linux/ata_platform.h> |
| 61f71621 | 16 | |
| 2dc11581 | 17 | static int __devinit pata_of_platform_probe(struct platform_device *ofdev, |
| 61f71621 AV |
18 | const struct of_device_id *match) |
| 19 | { | |
| 20 | int ret; | |
| 61c7a080 | 21 | struct device_node *dn = ofdev->dev.of_node; |
| 61f71621 AV |
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 | ||
| 9cd55be4 OJ |
37 | if (of_device_is_compatible(dn, "electra-ide")) { |
| 38 | /* Altstatus is really at offset 0x3f6 from the primary window | |
| 39 | * on electra-ide. Adjust ctl_res and io_res accordingly. | |
| 40 | */ | |
| 41 | ctl_res = io_res; | |
| 42 | ctl_res.start = ctl_res.start+0x3f6; | |
| 43 | io_res.end = ctl_res.start-1; | |
| 44 | } else { | |
| 45 | ret = of_address_to_resource(dn, 1, &ctl_res); | |
| 46 | if (ret) { | |
| 47 | dev_err(&ofdev->dev, "can't get CTL address from " | |
| 48 | "device tree\n"); | |
| 49 | return -EINVAL; | |
| 50 | } | |
| 61f71621 AV |
51 | } |
| 52 | ||
| 53 | ret = of_irq_to_resource(dn, 0, &irq_res); | |
| 54 | if (ret == NO_IRQ) | |
| 4538d0ca | 55 | irq_res.start = irq_res.end = 0; |
| 61f71621 AV |
56 | else |
| 57 | irq_res.flags = 0; | |
| 58 | ||
| 59 | prop = of_get_property(dn, "reg-shift", NULL); | |
| 60 | if (prop) | |
| 61 | reg_shift = *prop; | |
| 62 | ||
| 63 | prop = of_get_property(dn, "pio-mode", NULL); | |
| 64 | if (prop) { | |
| 65 | pio_mode = *prop; | |
| 66 | if (pio_mode > 6) { | |
| 67 | dev_err(&ofdev->dev, "invalid pio-mode\n"); | |
| 68 | return -EINVAL; | |
| 69 | } | |
| 70 | } else { | |
| 71 | dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); | |
| 72 | } | |
| 73 | ||
| 74 | pio_mask = 1 << pio_mode; | |
| 75 | pio_mask |= (1 << pio_mode) - 1; | |
| 76 | ||
| 77 | return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, &irq_res, | |
| 78 | reg_shift, pio_mask); | |
| 79 | } | |
| 80 | ||
| 2dc11581 | 81 | static int __devexit pata_of_platform_remove(struct platform_device *ofdev) |
| 61f71621 AV |
82 | { |
| 83 | return __pata_platform_remove(&ofdev->dev); | |
| 84 | } | |
| 85 | ||
| 86 | static struct of_device_id pata_of_platform_match[] = { | |
| 87 | { .compatible = "ata-generic", }, | |
| 9cd55be4 | 88 | { .compatible = "electra-ide", }, |
| 61f71621 AV |
89 | {}, |
| 90 | }; | |
| 91 | MODULE_DEVICE_TABLE(of, pata_of_platform_match); | |
| 92 | ||
| 93 | static struct of_platform_driver pata_of_platform_driver = { | |
| 4018294b GL |
94 | .driver = { |
| 95 | .name = "pata_of_platform", | |
| 96 | .owner = THIS_MODULE, | |
| 97 | .of_match_table = pata_of_platform_match, | |
| 98 | }, | |
| 61f71621 AV |
99 | .probe = pata_of_platform_probe, |
| 100 | .remove = __devexit_p(pata_of_platform_remove), | |
| 101 | }; | |
| 102 | ||
| 103 | static int __init pata_of_platform_init(void) | |
| 104 | { | |
| 105 | return of_register_platform_driver(&pata_of_platform_driver); | |
| 106 | } | |
| 107 | module_init(pata_of_platform_init); | |
| 108 | ||
| 109 | static void __exit pata_of_platform_exit(void) | |
| 110 | { | |
| 111 | of_unregister_platform_driver(&pata_of_platform_driver); | |
| 112 | } | |
| 113 | module_exit(pata_of_platform_exit); | |
| 114 | ||
| 115 | MODULE_DESCRIPTION("OF-platform PATA driver"); | |
| 116 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
| 117 | MODULE_LICENSE("GPL"); |