projects / linux.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 <[email protected]> | |
| 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 | ||
| 25df73d9 | 18 | static const struct scsi_host_template pata_platform_sht = { |
| 17263905 AM |
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; | |
| db6a3f47 | 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; |
| db6a3f47 | 33 | int irq; |
| 61f71621 AV |
34 | |
| 35 | ret = of_address_to_resource(dn, 0, &io_res); | |
| 36 | if (ret) { | |
| 37 | dev_err(&ofdev->dev, "can't get IO address from " | |
| 38 | "device tree\n"); | |
| 39 | return -EINVAL; | |
| 40 | } | |
| 41 | ||
| ca99140a AS |
42 | ret = of_address_to_resource(dn, 1, &ctl_res); |
| 43 | if (ret) { | |
| 44 | dev_err(&ofdev->dev, "can't get CTL address from " | |
| 45 | "device tree\n"); | |
| 46 | return -EINVAL; | |
| 61f71621 AV |
47 | } |
| 48 | ||
| db6a3f47 LP |
49 | memset(&irq_res, 0, sizeof(irq_res)); |
| 50 | ||
| 51 | irq = platform_get_irq_optional(ofdev, 0); | |
| 52 | if (irq < 0 && irq != -ENXIO) | |
| 53 | return irq; | |
| 54 | if (irq > 0) { | |
| 55 | irq_res.start = irq; | |
| 56 | irq_res.end = irq; | |
| 57 | } | |
| 61f71621 | 58 | |
| 73b29514 | 59 | of_property_read_u32(dn, "reg-shift", ®_shift); |
| 61f71621 | 60 | |
| 73b29514 | 61 | if (!of_property_read_u32(dn, "pio-mode", &pio_mode)) { |
| 61f71621 AV |
62 | if (pio_mode > 6) { |
| 63 | dev_err(&ofdev->dev, "invalid pio-mode\n"); | |
| 64 | return -EINVAL; | |
| 65 | } | |
| 66 | } else { | |
| 67 | dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n"); | |
| 68 | } | |
| 69 | ||
| f3d5e4f1 AS |
70 | use16bit = of_property_read_bool(dn, "ata-generic,use16bit"); |
| 71 | ||
| 61f71621 AV |
72 | pio_mask = 1 << pio_mode; |
| 73 | pio_mask |= (1 << pio_mode) - 1; | |
| 74 | ||
| db6a3f47 | 75 | return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq > 0 ? &irq_res : NULL, |
| f3d5e4f1 AS |
76 | reg_shift, pio_mask, &pata_platform_sht, |
| 77 | use16bit); | |
| 61f71621 AV |
78 | } |
| 79 | ||
| e3779f6a | 80 | static const struct of_device_id pata_of_platform_match[] = { |
| 61f71621 | 81 | { .compatible = "ata-generic", }, |
| 5e776d7b | 82 | { /* sentinel */ } |
| 61f71621 AV |
83 | }; |
| 84 | MODULE_DEVICE_TABLE(of, pata_of_platform_match); | |
| 85 | ||
| 1c48a5c9 | 86 | static struct platform_driver pata_of_platform_driver = { |
| 4018294b | 87 | .driver = { |
| 17263905 | 88 | .name = DRV_NAME, |
| 4018294b GL |
89 | .of_match_table = pata_of_platform_match, |
| 90 | }, | |
| 61f71621 | 91 | .probe = pata_of_platform_probe, |
| 2d910fe1 | 92 | .remove = ata_platform_remove_one, |
| 61f71621 AV |
93 | }; |
| 94 | ||
| 99c8ea3e | 95 | module_platform_driver(pata_of_platform_driver); |
| 61f71621 AV |
96 | |
| 97 | MODULE_DESCRIPTION("OF-platform PATA driver"); | |
| 98 | MODULE_AUTHOR("Anton Vorontsov <[email protected]>"); | |
| 99 | MODULE_LICENSE("GPL"); |