cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-primax.c

Directory: drivers/hid
/*
 * HID driver for primax and similar keyboards with in-band modifiers
 *
 * Copyright 2011 Google Inc. All Rights Reserved
 *
 * Author:
 *      Terry Lambert <tlambert@google.com>
 *
 * 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.
 */

#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; }

Contributors

PersonTokensPropCommitsCommitProp
terry lambertterry lambert126100.00%1100.00%
Total126100.00%1100.00%

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");

Overall Contributors

PersonTokensPropCommitsCommitProp
terry lambertterry lambert20199.01%150.00%
h hartley sweetenh hartley sweeten20.99%150.00%
Total203100.00%2100.00%
Directory: drivers/hid
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