cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-zpff.c

Directory: drivers/hid
/*
 *  Force feedback support for Zeroplus based devices
 *
 *  Copyright (c) 2005, 2006 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/hid.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/module.h>

#include "hid-ids.h"

#ifdef CONFIG_ZEROPLUS_FF


struct zpff_device {
	
struct hid_report *report;
};


static int zpff_play(struct input_dev *dev, void *data, struct ff_effect *effect) { struct hid_device *hid = input_get_drvdata(dev); struct zpff_device *zpff = data; int left, right; /* * The following is specified the other way around in the Zeroplus * datasheet but the order below is correct for the XFX Executioner; * however it is possible that the XFX Executioner is an exception */ left = effect->u.rumble.strong_magnitude; right = effect->u.rumble.weak_magnitude; dbg_hid("called with 0x%04x 0x%04x\n", left, right); left = left * 0x7f / 0xffff; right = right * 0x7f / 0xffff; zpff->report->field[2]->value[0] = left; zpff->report->field[3]->value[0] = right; dbg_hid("running with 0x%02x 0x%02x\n", left, right); hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula13393.01%120.00%
jiri kosinajiri kosina42.80%120.00%
dmitry torokhovdmitry torokhov32.10%120.00%
benjamin tissoiresbenjamin tissoires21.40%120.00%
jiri slabyjiri slaby10.70%120.00%
Total143100.00%5100.00%


static int zpff_init(struct hid_device *hid) { struct zpff_device *zpff; struct hid_report *report; struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); struct input_dev *dev = hidinput->input; int i, error; for (i = 0; i < 4; i++) { report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1); if (!report) return -ENODEV; } zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL); if (!zpff) return -ENOMEM; set_bit(FF_RUMBLE, dev->ffbit); error = input_ff_create_memless(dev, zpff, zpff_play); if (error) { kfree(zpff); return error; } zpff->report = report; zpff->report->field[0]->value[0] = 0x00; zpff->report->field[1]->value[0] = 0x02; zpff->report->field[2]->value[0] = 0x00; zpff->report->field[3]->value[0] = 0x00; hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT); hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula20786.25%116.67%
kees cookkees cook2410.00%116.67%
jiri slabyjiri slaby52.08%233.33%
joe perchesjoe perches20.83%116.67%
benjamin tissoiresbenjamin tissoires20.83%116.67%
Total240100.00%6100.00%

#else
static inline int zpff_init(struct hid_device *hid) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jiri kosinajiri kosina15100.00%1100.00%
Total15100.00%1100.00%

#endif
static int zp_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); goto err; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); if (ret) { hid_err(hdev, "hw start failed\n"); goto err; } zpff_init(hdev); return 0; err: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby8297.62%150.00%
joe perchesjoe perches22.38%150.00%
Total84100.00%2100.00%

static const struct hid_device_id zp_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) }, { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) }, { } }; MODULE_DEVICE_TABLE(hid, zp_devices); static struct hid_driver zp_driver = { .name = "zeroplus", .id_table = zp_devices, .probe = zp_probe, }; module_hid_driver(zp_driver); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula35761.13%18.33%
jiri slabyjiri slaby15827.05%216.67%
jiri kosinajiri kosina264.45%216.67%
kees cookkees cook244.11%18.33%
joe perchesjoe perches40.68%18.33%
benjamin tissoiresbenjamin tissoires40.68%18.33%
tejun heotejun heo30.51%18.33%
paul gortmakerpaul gortmaker30.51%18.33%
dmitry torokhovdmitry torokhov30.51%18.33%
h hartley sweetenh hartley sweeten20.34%18.33%
Total584100.00%12100.00%
Directory: drivers/hid
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