projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 61f71621 AV |
2 | /* |
| 3 | * OF-platform PATA driver | |
| 4 | * | |
| 5 | * Copyright (c) 2007 MontaVista Software, Inc. | |
| 6 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
| 61f71621 AV |
7 | */ |
| 8 | ||
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/module.h> | |
| 37210fbe | 11 | #include <linux/of_address.h> |
| d0643aa1 | 12 | #include <linux/platform_device.h> |
| 0a87e3e9 | 13 | #include <linux/ata_platform.h> |
| 84043ac2 | 14 | #include <linux/libata.h> |
| 61f71621 | 15 | |
| 17263905 AM |
16 | #define DRV_NAME "pata_of_platform" |
| 17 | ||
| 18 | static struct scsi_host_template pata_platform_sht = { | |
| 19 | ATA_PIO_SHT(DRV_NAME), | |
| 20 | }; | |
| 21 | ||
| 0ec24914 | 22 | static int pata_of_platform_probe(struct platform_device *ofdev) |
| 61f71621 AV |
23 | { |
| 24 | int ret; | |
| 61c7a080 | 25 | struct device_node *dn = ofdev->dev.of_node; |
| 61f71621 AV |
26 | struct resource io_res; |
| 27 | struct resource ctl_res; | |
| d0643aa1 | 28 | struct resource *irq_res; |
| 61f71621 AV |
29 | unsigned int reg_shift = 0; |
| 30 | int pio_mode = 0; | |
| 31 | int pio_mask; | |
| f3d5e4f1 | 32 | bool use16bit; |
| 61f71621 AV |
33 | |
| 34 | ret = of_address_to_resource(dn, 0, &io_res); | |
| 35 | if (ret) { | |
| 36 | dev_err(&ofdev->dev, "can't get IO address from " | |
| 37 | "device tree\n"); | |
| 38 | return -EINVAL; | |
| 39 | } | |
| 40 | ||
| ca99140a AS |
41 | ret = of_address_to_resource(dn, 1, &ctl_res); |
| 42 | if (ret) { | |
| 43 | dev_err(&ofdev->dev, "can't get CTL address from " | |
| 44 | "device tree\n"); | |
| 45 | return -EINVAL; | |
| 61f71621 AV |
46 | } |
| 47 | ||
| d0643aa1 | 48 | irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0); |
| 61f71621 | 49 | |
| 73b29514 | 50 | of_property_read_u32(dn, "reg-shift", ®_shift); |
| 61f71621 | 51 | |
| 73b29514 | 52 | if (!of_property_read_u32(dn, "pio-mode", &pio_mode)) { |
| 61f71621 AV |
53 | if (pio_mode > 6) { |
| 54 | dev_err(&ofdev->dev, "invalid pio-mode\n"); | |
| 55 | return -EINVAL; | |
| 56 | } | |
| 57 | } else { | |
| 58 | dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); | |
| 59 | } | |
| 60 | ||
| f3d5e4f1 AS |
61 | use16bit = of_property_read_bool(dn, "ata-generic,use16bit"); |
| 62 | ||
| 61f71621 AV |
63 | pio_mask = 1 << pio_mode; |
| 64 | pio_mask |= (1 << pio_mode) - 1; | |
| 65 | ||
| d0643aa1 | 66 | return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq_res, |
| f3d5e4f1 AS |
67 | reg_shift, pio_mask, &pata_platform_sht, |
| 68 | use16bit); | |
| 61f71621 AV |
69 | } |
| 70 | ||
| e3779f6a | 71 | static const struct of_device_id pata_of_platform_match[] = { |
| 61f71621 | 72 | { .compatible = "ata-generic", }, |
| ca99140a | 73 | { }, |
| 61f71621 AV |
74 | }; |
| 75 | MODULE_DEVICE_TABLE(of, pata_of_platform_match); | |
| 76 | ||
| 1c48a5c9 | 77 | static struct platform_driver pata_of_platform_driver = { |
| 4018294b | 78 | .driver = { |
| 17263905 | 79 | .name = DRV_NAME, |
| 4018294b GL |
80 | .of_match_table = pata_of_platform_match, |
| 81 | }, | |
| 61f71621 | 82 | .probe = pata_of_platform_probe, |
| 3e7068da | 83 | .remove = ata_platform_remove_one, |
| 61f71621 AV |
84 | }; |
| 85 | ||
| 99c8ea3e | 86 | module_platform_driver(pata_of_platform_driver); |
| 61f71621 AV |
87 | |
| 88 | MODULE_DESCRIPTION("OF-platform PATA driver"); | |
| 89 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
| 90 | MODULE_LICENSE("GPL"); |