[linux.git] / drivers / hid / hid-cypress.c

/*
 *  HID driver for some cypress "special" devices
 *
 *  Copyright (c) 1999 Andreas Gal
 *  Copyright (c) 2000-2005 Vojtech Pavlik <[email protected]>
 *  Copyright (c) 2005 Michael Haboustak <[email protected]> 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;

	for (i = 0; i < *rsize - 4; i++)
		if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
			rdesc[i] = 0x19;
			rdesc[i + 2] = 0x29;
			swap(rdesc[i + 3], rdesc[i + 1]);
		}
	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 <[email protected]>
	6	* Copyright (c) 2005 Michael Haboustak <[email protected]> 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
73e4008d	42	for (i = 0; i < *rsize - 4; i++)
0f221320	43	if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) {
0f221320 JS	44	rdesc[i] = 0x19;
0f221320 JS	45	rdesc[i + 2] = 0x29;
74a3e0c7	46	swap(rdesc[i + 3], rdesc[i + 1]);
0f221320	47	}
73e4008d	48	return rdesc;
0f221320 JS	49	}
	50
	51	static int cp_input_mapped(struct hid_device hdev, struct hid_input hi,
	52	struct hid_field field, struct hid_usage usage,
	53	unsigned long *bit, int max)
	54	{
	55	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
	56
	57	if (!(quirks & CP_2WHEEL_MOUSE_HACK))
	58	return 0;
	59
	60	if (usage->type == EV_REL && usage->code == REL_WHEEL)
	61	set_bit(REL_HWHEEL, *bit);
	62	if (usage->hid == 0x00090005)
	63	return -1;
	64
	65	return 0;
	66	}
	67
	68	static int cp_event(struct hid_device hdev, struct hid_field field,
	69	struct hid_usage *usage, __s32 value)
	70	{
	71	unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
	72
	73	if (!(hdev->claimed & HID_CLAIMED_INPUT) \|\| !field->hidinput \|\|
	74	!usage->type \|\| !(quirks & CP_2WHEEL_MOUSE_HACK))
	75	return 0;
	76
	77	if (usage->hid == 0x00090005) {
	78	if (value)
	79	quirks \|= CP_2WHEEL_MOUSE_HACK_ON;
	80	else
	81	quirks &= ~CP_2WHEEL_MOUSE_HACK_ON;
	82	hid_set_drvdata(hdev, (void *)quirks);
	83	return 1;
	84	}
	85
	86	if (usage->code == REL_WHEEL && (quirks & CP_2WHEEL_MOUSE_HACK_ON)) {
	87	struct input_dev *input = field->hidinput->input;
	88
	89	input_event(input, usage->type, REL_HWHEEL, value);
	90	return 1;
	91	}
	92
	93	return 0;
	94	}
	95
	96	static int cp_probe(struct hid_device hdev, const struct hid_device_id id)
	97	{
	98	unsigned long quirks = id->driver_data;
	99	int ret;
	100
	101	hid_set_drvdata(hdev, (void *)quirks);
	102
	103	ret = hid_parse(hdev);
	104	if (ret) {
4291ee30	105	hid_err(hdev, "parse failed\n");
0f221320 JS	106	goto err_free;
	107	}
	108
93c10132	109	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
0f221320	110	if (ret) {
4291ee30	111	hid_err(hdev, "hw start failed\n");
0f221320 JS	112	goto err_free;
	113	}
	114
	115	return 0;
	116	err_free:
	117	return ret;
	118	}
	119
	120	static const struct hid_device_id cp_devices[] = {
	121	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1),
	122	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
	123	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2),
	124	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
e8d0eab4 JK	125	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3),
e8d0eab4 JK	126	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
76c9d8fe LV	127	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_4),
76c9d8fe LV	128	.driver_data = CP_RDESC_SWAPPED_MIN_MAX },
0f221320 JS	129	{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE),
	130	.driver_data = CP_2WHEEL_MOUSE_HACK },
	131	{ }
	132	};
	133	MODULE_DEVICE_TABLE(hid, cp_devices);
	134
	135	static struct hid_driver cp_driver = {
	136	.name = "cypress",
	137	.id_table = cp_devices,
	138	.report_fixup = cp_report_fixup,
	139	.input_mapped = cp_input_mapped,
	140	.event = cp_event,
	141	.probe = cp_probe,
	142	};
f425458e	143	module_hid_driver(cp_driver);
0f221320	144
0f221320	145	MODULE_LICENSE("GPL");