[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hid / hid-cypress.c

/*
 *  HID driver for some cypress "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/hid.h>
#include <linux/input.h>
#include <linux/module.h>

#include "hid-ids.h"

#define CP_RDESC_SWAPPED_MIN_MAX	0x01
#define CP_2WHEEL_MOUSE_HACK		0x02
#define CP_2WHEEL_MOUSE_HACK_ON		0x04

/*
 * Some USB barcode readers from cypress have usage min and usage max in
 * the wrong order
 */
static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
	unsigned int i;

	if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
		return rdesc;

	if (*rsize < 4)
		return rdesc;

	for (i = 0; i < *rsize - 4; i++)
		if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
			__u8 tmp;

			rdesc[i] = 0x19;
			rdesc[i + 2] = 0x29;
			tmp = rdesc[i + 3];
			rdesc[i + 3] = rdesc[i + 1];
			rdesc[i + 1] = tmp;
		}
	return rdesc;
}

static int cp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
		struct hid_field *field, struct hid_usage *usage,
		unsigned long **bit, int *max)
{
	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);

	if (!(quirks & CP_2WHEEL_MOUSE_HACK))
		return 0;

	if (usage->type == EV_REL && usage->code == REL_WHEEL)
		set_bit(REL_HWHEEL, *bit);
	if (usage->hid == 0x00090005)
		return -1;

	return 0;
}

static int cp_event(struct hid_device *hdev, struct hid_field *field,
		struct hid_usage *usage, __s32 value)
{
	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);

	if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
			!usage->type || !(quirks & CP_2WHEEL_MOUSE_HACK))
		return 0;

	if (usage->hid == 0x00090005) {
		if (value)
			quirks |=  CP_2WHEEL_MOUSE_HACK_ON;
		else
			quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
		hid_set_drvdata(hdev, (void *)quirks);
		return 1;
	}

	if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
		struct input_dev *input = field->hidinput->input;

		input_event(input, usage->type, REL_HWHEEL, value);
		return 1;
	}

	return 0;
}

static int cp_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	unsigned long quirks = id->driver_data;
	int ret;

	hid_set_drvdata(hdev, (void *)quirks);

	ret = hid_parse(hdev);
	if (ret) {
		hid_err(hdev, "parse failed\n");
		goto err_free;
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (ret) {
		hid_err(hdev, "hw start failed\n");
		goto err_free;
	}

	return 0;
err_free:
	return ret;
}

static const struct hid_device_id cp_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
		.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
		.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
		.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
		.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
		.driver_data = CP_2WHEEL_MOUSE_HACK },
	{ }
};
MODULE_DEVICE_TABLE(hid, cp_devices);

static struct hid_driver cp_driver = {
	.name = "cypress",
	.id_table = cp_devices,
	.report_fixup = cp_report_fixup,
	.input_mapped = cp_input_mapped,
	.event = cp_event,
	.probe = cp_probe,
};
module_hid_driver(cp_driver);

MODULE_LICENSE("GPL");
Commit	Line	Data
0f221320 JS	1	/*
	2	* HID driver for some cypress "special" devices
	3	*
	4	* Copyright (c) 1999 Andreas Gal
	5	* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
	6	* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
	7	* Copyright (c) 2006-2007 Jiri Kosina
0f221320 JS	8	* Copyright (c) 2008 Jiri Slaby
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License as published by the Free
	14	* Software Foundation; either version 2 of the License, or (at your option)
	15	* any later version.
	16	*/
	17
	18	#include <linux/device.h>
	19	#include <linux/hid.h>
	20	#include <linux/input.h>
	21	#include <linux/module.h>
	22
	23	#include "hid-ids.h"
	24
	25	#define CP_RDESC_SWAPPED_MIN_MAX 0x01
	26	#define CP_2WHEEL_MOUSE_HACK 0x02
	27	#define CP_2WHEEL_MOUSE_HACK_ON 0x04
	28
	29	/*
	30	* Some USB barcode readers from cypress have usage min and usage max in
	31	* the wrong order
	32	*/
73e4008d NK	33	static __u8 cp_report_fixup(struct hid_device hdev, __u8 *rdesc,
73e4008d NK	34	unsigned int *rsize)
0f221320 JS	35	{
	36	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
	37	unsigned int i;
	38
	39	if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX))
73e4008d	40	return rdesc;
0f221320	41
a48d5b15 GKH	42	if (*rsize < 4)
	43	return rdesc;
	44
73e4008d	45	for (i = 0; i < *rsize - 4; i++)
0f221320 JS	46	if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
	47	__u8 tmp;
	48
	49	rdesc[i] = 0x19;
	50	rdesc[i + 2] = 0x29;
	51	tmp = rdesc[i + 3];
	52	rdesc[i + 3] = rdesc[i + 1];
	53	rdesc[i + 1] = tmp;
	54	}
73e4008d	55	return rdesc;
0f221320 JS	56	}
	57
	58	static int cp_input_mapped(struct hid_device hdev, struct hid_input hi,
	59	struct hid_field field, struct hid_usage usage,
	60	unsigned long *bit, int max)
	61	{
	62	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
	63
	64	if (!(quirks & CP_2WHEEL_MOUSE_HACK))
	65	return 0;
	66
	67	if (usage->type == EV_REL && usage->code == REL_WHEEL)
	68	set_bit(REL_HWHEEL, *bit);
	69	if (usage->hid == 0x00090005)
	70	return -1;
	71
	72	return 0;
	73	}
	74
	75	static int cp_event(struct hid_device hdev, struct hid_field field,
	76	struct hid_usage *usage, __s32 value)
	77	{
	78	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
	79
	80	if (!(hdev->claimed & HID_CLAIMED_INPUT) \|\| !field->hidinput \|\|
	81	!usage->type \|\| !(quirks & CP_2WHEEL_MOUSE_HACK))
	82	return 0;
	83
	84	if (usage->hid == 0x00090005) {
	85	if (value)
	86	quirks \|= CP_2WHEEL_MOUSE_HACK_ON;
	87	else
	88	quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
	89	hid_set_drvdata(hdev, (void *)quirks);
	90	return 1;
	91	}
	92
	93	if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
	94	struct input_dev *input = field->hidinput->input;
	95
	96	input_event(input, usage->type, REL_HWHEEL, value);
	97	return 1;
	98	}
	99
	100	return 0;
	101	}
	102
	103	static int cp_probe(struct hid_device hdev, const struct hid_device_id id)
	104	{
	105	unsigned long quirks = id->driver_data;
	106	int ret;
	107
	108	hid_set_drvdata(hdev, (void *)quirks);
	109
	110	ret = hid_parse(hdev);
	111	if (ret) {
4291ee30	112	hid_err(hdev, "parse failed\n");
0f221320 JS	113	goto err_free;
	114	}
	115
93c10132	116	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
0f221320	117	if (ret) {
4291ee30	118	hid_err(hdev, "hw start failed\n");
0f221320 JS	119	goto err_free;
	120	}
	121
	122	return 0;
	123	err_free:
	124	return ret;
	125	}
	126
	127	static const struct hid_device_id cp_devices[] = {
	128	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
	129	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
	130	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
	131	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
e8d0eab4 JK	132	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
e8d0eab4 JK	133	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
76c9d8fe LV	134	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
76c9d8fe LV	135	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
0f221320 JS	136	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
	137	.driver_data = CP_2WHEEL_MOUSE_HACK },
	138	{ }
	139	};
	140	MODULE_DEVICE_TABLE(hid, cp_devices);
	141
	142	static struct hid_driver cp_driver = {
	143	.name = "cypress",
	144	.id_table = cp_devices,
	145	.report_fixup = cp_report_fixup,
	146	.input_mapped = cp_input_mapped,
	147	.event = cp_event,
	148	.probe = cp_probe,
	149	};
f425458e	150	module_hid_driver(cp_driver);
0f221320	151
0f221320	152	MODULE_LICENSE("GPL");