| Jiri Slaby | 980a3da | 2008-06-25 22:31:48 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * HID driver for some samsung "special" devices |
| 3 | * |
| 4 | * Copyright (c) 1999 Andreas Gal |
| 5 | * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
| 6 | * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
| 7 | * Copyright (c) 2006-2007 Jiri Kosina |
| 8 | * Copyright (c) 2007 Paul Walmsley |
| 9 | * Copyright (c) 2008 Jiri Slaby |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * This program is free software; you can redistribute it and/or modify it |
| 14 | * under the terms of the GNU General Public License as published by the Free |
| 15 | * Software Foundation; either version 2 of the License, or (at your option) |
| 16 | * any later version. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/device.h> |
| 20 | #include <linux/hid.h> |
| 21 | #include <linux/module.h> |
| 22 | |
| 23 | #include "hid-ids.h" |
| 24 | |
| 25 | /* |
| 26 | * Samsung IrDA remote controller (reports as Cypress USB Mouse). |
| 27 | * |
| 28 | * Vendor specific report #4 has a size of 48 bit, |
| 29 | * and therefore is not accepted when inspecting the descriptors. |
| 30 | * As a workaround we reinterpret the report as: |
| 31 | * Variable type, count 6, size 8 bit, log. maximum 255 |
| 32 | * The burden to reconstruct the data is moved into user space. |
| 33 | */ |
| 34 | static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
| 35 | unsigned int rsize) |
| 36 | { |
| 37 | if (rsize >= 182 && rdesc[175] == 0x25 && rdesc[176] == 0x40 && |
| 38 | rdesc[177] == 0x75 && rdesc[178] == 0x30 && |
| 39 | rdesc[179] == 0x95 && rdesc[180] == 0x01 && |
| 40 | rdesc[182] == 0x40) { |
| 41 | dev_info(&hdev->dev, "fixing up Samsung IrDA report " |
| 42 | "descriptor\n"); |
| 43 | rdesc[176] = 0xff; |
| 44 | rdesc[178] = 0x08; |
| 45 | rdesc[180] = 0x06; |
| 46 | rdesc[182] = 0x42; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | static int samsung_probe(struct hid_device *hdev, |
| 51 | const struct hid_device_id *id) |
| 52 | { |
| 53 | int ret; |
| 54 | |
| 55 | hdev->quirks |= HID_QUIRK_HIDDEV | HID_QUIRK_IGNORE_HIDINPUT; |
| 56 | |
| 57 | ret = hid_parse(hdev); |
| 58 | if (ret) { |
| 59 | dev_err(&hdev->dev, "parse failed\n"); |
| 60 | goto err_free; |
| 61 | } |
| 62 | |
| 63 | ret = hid_hw_start(hdev); |
| 64 | if (ret) { |
| 65 | dev_err(&hdev->dev, "hw start failed\n"); |
| 66 | goto err_free; |
| 67 | } |
| 68 | |
| 69 | return 0; |
| 70 | err_free: |
| 71 | return ret; |
| 72 | } |
| 73 | |
| 74 | static const struct hid_device_id samsung_devices[] = { |
| 75 | { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) }, |
| 76 | { } |
| 77 | }; |
| 78 | MODULE_DEVICE_TABLE(hid, samsung_devices); |
| 79 | |
| 80 | static struct hid_driver samsung_driver = { |
| 81 | .name = "samsung", |
| 82 | .id_table = samsung_devices, |
| 83 | .report_fixup = samsung_report_fixup, |
| 84 | .probe = samsung_probe, |
| 85 | }; |
| 86 | |
| 87 | static int samsung_init(void) |
| 88 | { |
| 89 | return hid_register_driver(&samsung_driver); |
| 90 | } |
| 91 | |
| 92 | static void samsung_exit(void) |
| 93 | { |
| 94 | hid_unregister_driver(&samsung_driver); |
| 95 | } |
| 96 | |
| 97 | module_init(samsung_init); |
| 98 | module_exit(samsung_exit); |
| 99 | MODULE_LICENSE("GPL"); |
| 100 | |
| 101 | HID_COMPAT_LOAD_DRIVER(samsung); |