128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* HID driver for some samsung "special" devices
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2006-2007 Jiri Kosina
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* Copyright (c) 2007 Paul Walmsley
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* Copyright (c) 2008 Jiri Slaby
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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/*
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* Samsung IrDA remote controller (reports as Cypress USB Mouse).
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*
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* There are several variants for 0419:0001:
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*
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* 1. 184 byte report descriptor
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* Vendor specific report #4 has a size of 48 bit,
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* and therefore is not accepted when inspecting the descriptors.
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* As a workaround we reinterpret the report as:
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* Variable type, count 6, size 8 bit, log. maximum 255
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* The burden to reconstruct the data is moved into user space.
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*
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* 2. 203 byte report descriptor
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* Report #4 has an array field with logical range 0..18 instead of 1..15.
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*
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* 3. 135 byte report descriptor
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* Report #4 has an array field with logical range 0..17 instead of 1..14.
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*/
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static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int rsize)
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{
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if (rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 &&
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rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
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rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
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rdesc[182] == 0x40) {
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dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
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"descriptor\n", 184);
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rdesc[176] = 0xff;
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rdesc[178] = 0x08;
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rdesc[180] = 0x06;
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rdesc[182] = 0x42;
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} else
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if (rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 &&
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rdesc[194] == 0x25 && rdesc[195] == 0x12) {
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dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
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"descriptor\n", 203);
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rdesc[193] = 0x1;
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rdesc[195] = 0xf;
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} else
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if (rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 &&
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rdesc[126] == 0x25 && rdesc[127] == 0x11) {
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dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
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"descriptor\n", 135);
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rdesc[125] = 0x1;
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rdesc[127] = 0xe;
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}
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}
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static int samsung_probe(struct hid_device *hdev,
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const struct hid_device_id *id)
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{
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int ret;
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unsigned int cmask = HID_CONNECT_DEFAULT;
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ret = hid_parse(hdev);
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if (ret) {
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dev_err(&hdev->dev, "parse failed\n");
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goto err_free;
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}
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if (hdev->rsize == 184) {
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/* disable hidinput, force hiddev */
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cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
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HID_CONNECT_HIDDEV_FORCE;
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}
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ret = hid_hw_start(hdev, cmask);
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if (ret) {
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dev_err(&hdev->dev, "hw start failed\n");
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goto err_free;
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}
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return 0;
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err_free:
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return ret;
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}
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static const struct hid_device_id samsung_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, samsung_devices);
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static struct hid_driver samsung_driver = {
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.name = "samsung",
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.id_table = samsung_devices,
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.report_fixup = samsung_report_fixup,
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.probe = samsung_probe,
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};
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static int __init samsung_init(void)
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{
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return hid_register_driver(&samsung_driver);
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}
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static void __exit samsung_exit(void)
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{
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hid_unregister_driver(&samsung_driver);
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}
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module_init(samsung_init);
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module_exit(samsung_exit);
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MODULE_LICENSE("GPL");
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