cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-lg2ff.c

Directory: drivers/hid
/*
 *  Force feedback support for Logitech RumblePad and Rumblepad 2
 *
 *  Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com>
 */

/*
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */


#include <linux/input.h>
#include <linux/slab.h>
#include <linux/hid.h>

#include "hid-lg.h"


struct lg2ff_device {
	
struct hid_report *report;
};


static int play_effect(struct input_dev *dev, void *data, struct ff_effect *effect) { struct hid_device *hid = input_get_drvdata(dev); struct lg2ff_device *lg2ff = data; int weak, strong; strong = effect->u.rumble.strong_magnitude; weak = effect->u.rumble.weak_magnitude; if (weak || strong) { weak = weak * 0xff / 0xffff; strong = strong * 0xff / 0xffff; lg2ff->report->field[0]->value[0] = 0x51; lg2ff->report->field[0]->value[2] = weak; lg2ff->report->field[0]->value[4] = strong; } else { lg2ff->report->field[0]->value[0] = 0xf3; lg2ff->report->field[0]->value[2] = 0x00; lg2ff->report->field[0]->value[4] = 0x00; } hid_hw_request(hid, lg2ff->report, HID_REQ_SET_REPORT); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula19798.99%150.00%
benjamin tissoiresbenjamin tissoires21.01%150.00%
Total199100.00%2100.00%


int lg2ff_init(struct hid_device *hid) { struct lg2ff_device *lg2ff; struct hid_report *report; struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); struct input_dev *dev = hidinput->input; int error; /* Check that the report looks ok */ report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7); if (!report) return -ENODEV; lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL); if (!lg2ff) return -ENOMEM; set_bit(FF_RUMBLE, dev->ffbit); error = input_ff_create_memless(dev, lg2ff, play_effect); if (error) { kfree(lg2ff); return error; } lg2ff->report = report; report->field[0]->value[0] = 0xf3; report->field[0]->value[1] = 0x00; report->field[0]->value[2] = 0x00; report->field[0]->value[3] = 0x00; report->field[0]->value[4] = 0x00; report->field[0]->value[5] = 0x00; report->field[0]->value[6] = 0x00; hid_hw_request(hid, report, HID_REQ_SET_REPORT); hid_info(hid, "Force feedback for Logitech variant 2 rumble devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula23893.33%114.29%
kees cookkees cook93.53%114.29%
jiri slabyjiri slaby41.57%228.57%
benjamin tissoiresbenjamin tissoires20.78%114.29%
elias vanderstuyftelias vanderstuyft10.39%114.29%
joe perchesjoe perches10.39%114.29%
Total255100.00%7100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula45494.98%111.11%
kees cookkees cook91.88%111.11%
jiri slabyjiri slaby51.05%222.22%
benjamin tissoiresbenjamin tissoires40.84%111.11%
tejun heotejun heo30.63%111.11%
joe perchesjoe perches10.21%111.11%
hendrik ibenhendrik iben10.21%111.11%
elias vanderstuyftelias vanderstuyft10.21%111.11%
Total478100.00%9100.00%
Directory: drivers/hid
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