/* * HID driver for some samsung "special" devices * * Copyright (c) 1999 Andreas Gal * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc * Copyright (c) 2006-2007 Jiri Kosina * Copyright (c) 2007 Paul Walmsley * Copyright (c) 2008 Jiri Slaby */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ #include <linux/device.h> #include <linux/hid.h> #include <linux/module.h> #include "hid-ids.h" /* * Samsung IrDA remote controller (reports as Cypress USB Mouse). * * Vendor specific report #4 has a size of 48 bit, * and therefore is not accepted when inspecting the descriptors. * As a workaround we reinterpret the report as: * Variable type, count 6, size 8 bit, log. maximum 255 * The burden to reconstruct the data is moved into user space. */ static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int rsize) { if (rsize >= 182 && rdesc[175] == 0x25 && rdesc[176] == 0x40 && rdesc[177] == 0x75 && rdesc[178] == 0x30 && rdesc[179] == 0x95 && rdesc[180] == 0x01 && rdesc[182] == 0x40) { dev_info(&hdev->dev, "fixing up Samsung IrDA report " "descriptor\n"); rdesc[176] = 0xff; rdesc[178] = 0x08; rdesc[180] = 0x06; rdesc[182] = 0x42; } } static int samsung_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; ret = hid_parse(hdev); if (ret) { dev_err(&hdev->dev, "parse failed\n"); goto err_free; } ret = hid_hw_start(hdev, (HID_CONNECT_DEFAULT & ~HID_CONNECT_HIDINPUT) | HID_CONNECT_HIDDEV_FORCE); if (ret) { dev_err(&hdev->dev, "hw start failed\n"); goto err_free; } return 0; err_free: return ret; } static const struct hid_device_id samsung_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) }, { } }; MODULE_DEVICE_TABLE(hid, samsung_devices); static struct hid_driver samsung_driver = { .name = "samsung", .id_table = samsung_devices, .report_fixup = samsung_report_fixup, .probe = samsung_probe, }; static int samsung_init(void) { return hid_register_driver(&samsung_driver); } static void samsung_exit(void) { hid_unregister_driver(&samsung_driver); } module_init(samsung_init); module_exit(samsung_exit); MODULE_LICENSE("GPL");