9c92ab6191
Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* HID driver for primax and similar keyboards with in-band modifiers
|
|
*
|
|
* Copyright 2011 Google Inc. All Rights Reserved
|
|
*
|
|
* Author:
|
|
* Terry Lambert <tlambert@google.com>
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "hid-ids.h"
|
|
|
|
static int px_raw_event(struct hid_device *hid, struct hid_report *report,
|
|
u8 *data, int size)
|
|
{
|
|
int idx = size;
|
|
|
|
switch (report->id) {
|
|
case 0: /* keyboard input */
|
|
/*
|
|
* Convert in-band modifier key values into out of band
|
|
* modifier bits and pull the key strokes from the report.
|
|
* Thus a report data set which looked like:
|
|
*
|
|
* [00][00][E0][30][00][00][00][00]
|
|
* (no modifier bits + "Left Shift" key + "1" key)
|
|
*
|
|
* Would be converted to:
|
|
*
|
|
* [01][00][00][30][00][00][00][00]
|
|
* (Left Shift modifier bit + "1" key)
|
|
*
|
|
* As long as it's in the size range, the upper level
|
|
* drivers don't particularly care if there are in-band
|
|
* 0-valued keys, so they don't stop parsing.
|
|
*/
|
|
while (--idx > 1) {
|
|
if (data[idx] < 0xE0 || data[idx] > 0xE7)
|
|
continue;
|
|
data[0] |= (1 << (data[idx] - 0xE0));
|
|
data[idx] = 0;
|
|
}
|
|
hid_report_raw_event(hid, HID_INPUT_REPORT, data, size, 0);
|
|
return 1;
|
|
|
|
default: /* unknown report */
|
|
/* Unknown report type; pass upstream */
|
|
hid_info(hid, "unknown report type %d\n", report->id);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hid_device_id px_devices[] = {
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, px_devices);
|
|
|
|
static struct hid_driver px_driver = {
|
|
.name = "primax",
|
|
.id_table = px_devices,
|
|
.raw_event = px_raw_event,
|
|
};
|
|
module_hid_driver(px_driver);
|
|
|
|
MODULE_AUTHOR("Terry Lambert <tlambert@google.com>");
|
|
MODULE_LICENSE("GPL");
|