cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-a4tech.c

Directory: drivers/hid
/*
 *  HID driver for some a4tech "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) 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/input.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>

#include "hid-ids.h"


#define A4_2WHEEL_MOUSE_HACK_7	0x01

#define A4_2WHEEL_MOUSE_HACK_B8	0x02


struct a4tech_sc {
	
unsigned long quirks;
	
unsigned int hw_wheel;
	
__s32 delayed_value;
};


static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) { struct a4tech_sc *a4 = hid_get_drvdata(hdev); if (usage->type == EV_REL && usage->code == REL_WHEEL) set_bit(REL_HWHEEL, *bit); if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) return -1; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby91100.00%1100.00%
Total91100.00%1100.00%


static int a4_event(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, __s32 value) { struct a4tech_sc *a4 = hid_get_drvdata(hdev); struct input_dev *input; if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || !usage->type) return 0; input = field->hidinput->input; if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { if (usage->type == EV_REL && usage->code == REL_WHEEL) { a4->delayed_value = value; return 1; } if (usage->hid == 0x000100b8) { input_event(input, EV_REL, value ? REL_HWHEEL : REL_WHEEL, a4->delayed_value); return 1; } } if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { a4->hw_wheel = !!value; return 1; } if (usage->code == REL_WHEEL && a4->hw_wheel) { input_event(input, usage->type, REL_HWHEEL, value); return 1; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby198100.00%1100.00%
Total198100.00%1100.00%


static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) { struct a4tech_sc *a4; int ret; a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL); if (a4 == NULL) { hid_err(hdev, "can't alloc device descriptor\n"); return -ENOMEM; } a4->quirks = id->driver_data; hid_set_drvdata(hdev, a4); ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); return ret; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (ret) { hid_err(hdev, "hw start failed\n"); return ret; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby11186.72%250.00%
benjamin tissoiresbenjamin tissoires1410.94%125.00%
joe perchesjoe perches32.34%125.00%
Total128100.00%4100.00%

static const struct hid_device_id a4_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), .driver_data = A4_2WHEEL_MOUSE_HACK_7 }, { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, { } }; MODULE_DEVICE_TABLE(hid, a4_devices); static struct hid_driver a4_driver = { .name = "a4tech", .id_table = a4_devices, .input_mapped = a4_input_mapped, .event = a4_event, .probe = a4_probe, }; module_hid_driver(a4_driver); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby52693.43%225.00%
benjamin tissoiresbenjamin tissoires142.49%112.50%
lech perczaklech perczak142.49%112.50%
tejun heotejun heo30.53%112.50%
joe perchesjoe perches30.53%112.50%
h hartley sweetenh hartley sweeten20.36%112.50%
jiri kosinajiri kosina10.18%112.50%
Total563100.00%8100.00%
Directory: drivers/hid
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