mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-01 08:04:22 +08:00
3975bc5630
Extends the existing Samsung USB IrDA (0419:0001) quirk with newly reported 171 byte variant. It needs the same quirk as the other devices already supported by hid-samsung (wrong logical range) Refactors duplicate trace call into local helper function. The original bug report for the new variant is available at the second half of this ticket page: https://bugs.launchpad.net/bugs/326986 Signed-off-by: Robert Schedel <r.schedel@yahoo.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*
|
|
* 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).
|
|
*
|
|
* There are several variants for 0419:0001:
|
|
*
|
|
* 1. 184 byte report descriptor
|
|
* 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.
|
|
*
|
|
* 2. 203 byte report descriptor
|
|
* Report #4 has an array field with logical range 0..18 instead of 1..15.
|
|
*
|
|
* 3. 135 byte report descriptor
|
|
* Report #4 has an array field with logical range 0..17 instead of 1..14.
|
|
*
|
|
* 4. 171 byte report descriptor
|
|
* Report #3 has an array field with logical range 0..1 instead of 1..3.
|
|
*/
|
|
static inline void samsung_dev_trace(struct hid_device *hdev,
|
|
unsigned int rsize)
|
|
{
|
|
dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
|
|
"descriptor\n", rsize);
|
|
}
|
|
|
|
static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
|
|
unsigned int rsize)
|
|
{
|
|
if (rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 &&
|
|
rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
|
|
rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
|
|
rdesc[182] == 0x40) {
|
|
samsung_dev_trace(hdev, 184);
|
|
rdesc[176] = 0xff;
|
|
rdesc[178] = 0x08;
|
|
rdesc[180] = 0x06;
|
|
rdesc[182] = 0x42;
|
|
} else
|
|
if (rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 &&
|
|
rdesc[194] == 0x25 && rdesc[195] == 0x12) {
|
|
samsung_dev_trace(hdev, 203);
|
|
rdesc[193] = 0x1;
|
|
rdesc[195] = 0xf;
|
|
} else
|
|
if (rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 &&
|
|
rdesc[126] == 0x25 && rdesc[127] == 0x11) {
|
|
samsung_dev_trace(hdev, 135);
|
|
rdesc[125] = 0x1;
|
|
rdesc[127] = 0xe;
|
|
} else
|
|
if (rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 &&
|
|
rdesc[162] == 0x25 && rdesc[163] == 0x01) {
|
|
samsung_dev_trace(hdev, 171);
|
|
rdesc[161] = 0x1;
|
|
rdesc[163] = 0x3;
|
|
}
|
|
}
|
|
|
|
static int samsung_probe(struct hid_device *hdev,
|
|
const struct hid_device_id *id)
|
|
{
|
|
int ret;
|
|
unsigned int cmask = HID_CONNECT_DEFAULT;
|
|
|
|
ret = hid_parse(hdev);
|
|
if (ret) {
|
|
dev_err(&hdev->dev, "parse failed\n");
|
|
goto err_free;
|
|
}
|
|
|
|
if (hdev->rsize == 184) {
|
|
/* disable hidinput, force hiddev */
|
|
cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
|
|
HID_CONNECT_HIDDEV_FORCE;
|
|
}
|
|
|
|
ret = hid_hw_start(hdev, cmask);
|
|
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 __init samsung_init(void)
|
|
{
|
|
return hid_register_driver(&samsung_driver);
|
|
}
|
|
|
|
static void __exit samsung_exit(void)
|
|
{
|
|
hid_unregister_driver(&samsung_driver);
|
|
}
|
|
|
|
module_init(samsung_init);
|
|
module_exit(samsung_exit);
|
|
MODULE_LICENSE("GPL");
|