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/*
* 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");
HID_COMPAT_LOAD_DRIVER(samsung);
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