projects / mirror_ubuntu-zesty-kernel.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> | |
| 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 | |
| 17263905 AM |
19 | #define DRV_NAME "pata_of_platform" |
| 20 | ||
| 21 | static struct scsi_host_template pata_platform_sht = { | |
| 22 | ATA_PIO_SHT(DRV_NAME), | |
| 23 | }; | |
| 24 | ||
| 0ec24914 | 25 | static int pata_of_platform_probe(struct platform_device *ofdev) |
| 61f71621 AV |
26 | { |
| 27 | int ret; | |
| 61c7a080 | 28 | struct device_node *dn = ofdev->dev.of_node; |
| 61f71621 AV |
29 | struct resource io_res; |
| 30 | struct resource ctl_res; | |
| d0643aa1 | 31 | struct resource *irq_res; |
| 61f71621 AV |
32 | unsigned int reg_shift = 0; |
| 33 | int pio_mode = 0; | |
| 34 | int pio_mask; | |
| 35 | const u32 *prop; | |
| 36 | ||
| 37 | ret = of_address_to_resource(dn, 0, &io_res); | |
| 38 | if (ret) { | |
| 39 | dev_err(&ofdev->dev, "can't get IO address from " | |
| 40 | "device tree\n"); | |
| 41 | return -EINVAL; | |
| 42 | } | |
| 43 | ||
| ca99140a AS |
44 | ret = of_address_to_resource(dn, 1, &ctl_res); |
| 45 | if (ret) { | |
| 46 | dev_err(&ofdev->dev, "can't get CTL address from " | |
| 47 | "device tree\n"); | |
| 48 | return -EINVAL; | |
| 61f71621 AV |
49 | } |
| 50 | ||
| d0643aa1 | 51 | irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0); |
| 61f71621 AV |
52 | |
| 53 | prop = of_get_property(dn, "reg-shift", NULL); | |
| 54 | if (prop) | |
| 37210fbe | 55 | reg_shift = be32_to_cpup(prop); |
| 61f71621 AV |
56 | |
| 57 | prop = of_get_property(dn, "pio-mode", NULL); | |
| 58 | if (prop) { | |
| 37210fbe | 59 | pio_mode = be32_to_cpup(prop); |
| 61f71621 AV |
60 | if (pio_mode > 6) { |
| 61 | dev_err(&ofdev->dev, "invalid pio-mode\n"); | |
| 62 | return -EINVAL; | |
| 63 | } | |
| 64 | } else { | |
| 65 | dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); | |
| 66 | } | |
| 67 | ||
| 68 | pio_mask = 1 << pio_mode; | |
| 69 | pio_mask |= (1 << pio_mode) - 1; | |
| 70 | ||
| d0643aa1 | 71 | return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res, |
| 17263905 | 72 | reg_shift, pio_mask, &pata_platform_sht); |
| 61f71621 AV |
73 | } |
| 74 | ||
| 61f71621 AV |
75 | static struct of_device_id pata_of_platform_match[] = { |
| 76 | { .compatible = "ata-generic", }, | |
| ca99140a | 77 | { }, |
| 61f71621 AV |
78 | }; |
| 79 | MODULE_DEVICE_TABLE(of, pata_of_platform_match); | |
| 80 | ||
| 1c48a5c9 | 81 | static struct platform_driver pata_of_platform_driver = { |
| 4018294b | 82 | .driver = { |
| 17263905 | 83 | .name = DRV_NAME, |
| 4018294b GL |
84 | .of_match_table = pata_of_platform_match, |
| 85 | }, | |
| 61f71621 | 86 | .probe = pata_of_platform_probe, |
| 3e7068da | 87 | .remove = ata_platform_remove_one, |
| 61f71621 AV |
88 | }; |
| 89 | ||
| 99c8ea3e | 90 | module_platform_driver(pata_of_platform_driver); |
| 61f71621 AV |
91 | |
| 92 | MODULE_DESCRIPTION("OF-platform PATA driver"); | |
| 93 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
| 94 | MODULE_LICENSE("GPL"); |