[linux-block.git] / drivers / hid / hid-zpff.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Force feedback support for Zeroplus based devices
 *
 *  Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
 */

/*
 */


#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;
}

static int zpff_init(struct hid_device *hid)
{
	struct zpff_device *zpff;
	struct hid_report *report;
	struct hid_input *hidinput;
	struct input_dev *dev;
	int i, error;

	if (list_empty(&hid->inputs)) {
		hid_err(hid, "no inputs found\n");
		return -ENODEV;
	}
	hidinput = list_entry(hid->inputs.next, struct hid_input, list);
	dev = hidinput->input;

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

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");
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
bb3caf7f AH	2	/*
	3	* Force feedback support for Zeroplus based devices
	4	*
	5	* Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
	6	*/
	7
	8	/*
bb3caf7f AH	9	*/
	10
	11
987fbc1f	12	#include <linux/hid.h>
bb3caf7f	13	#include <linux/input.h>
5a0e3ad6	14	#include <linux/slab.h>
8f86a2c3	15	#include <linux/module.h>
987fbc1f JS	16
	17	#include "hid-ids.h"
	18
0f6f4319	19	#ifdef CONFIG_ZEROPLUS_FF
bb3caf7f AH	20
	21	struct zpff_device {
	22	struct hid_report *report;
	23	};
	24
987fbc1f	25	static int zpff_play(struct input_dev dev, void data,
bb3caf7f AH	26	struct ff_effect *effect)
bb3caf7f AH	27	{
e0712985	28	struct hid_device *hid = input_get_drvdata(dev);
bb3caf7f AH	29	struct zpff_device *zpff = data;
	30	int left, right;
	31
	32	/*
	33	* The following is specified the other way around in the Zeroplus
	34	* datasheet but the order below is correct for the XFX Executioner;
	35	* however it is possible that the XFX Executioner is an exception
	36	*/
	37
	38	left = effect->u.rumble.strong_magnitude;
	39	right = effect->u.rumble.weak_magnitude;
58037eb9	40	dbg_hid("called with 0x%04x 0x%04x\n", left, right);
bb3caf7f AH	41
	42	left = left * 0x7f / 0xffff;
	43	right = right * 0x7f / 0xffff;
	44
	45	zpff->report->field[2]->value[0] = left;
	46	zpff->report->field[3]->value[0] = right;
58037eb9	47	dbg_hid("running with 0x%02x 0x%02x\n", left, right);
d8814272	48	hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
bb3caf7f AH	49
	50	return 0;
	51	}
	52
987fbc1f	53	static int zpff_init(struct hid_device *hid)
bb3caf7f AH	54	{
	55	struct zpff_device *zpff;
	56	struct hid_report *report;
d9d4b1e4 AS	57	struct hid_input *hidinput;
d9d4b1e4 AS	58	struct input_dev *dev;
78214e81	59	int i, error;
bb3caf7f	60
d9d4b1e4 AS	61	if (list_empty(&hid->inputs)) {
	62	hid_err(hid, "no inputs found\n");
	63	return -ENODEV;
	64	}
	65	hidinput = list_entry(hid->inputs.next, struct hid_input, list);
	66	dev = hidinput->input;
	67
78214e81 KC	68	for (i = 0; i < 4; i++) {
	69	report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
	70	if (!report)
	71	return -ENODEV;
bb3caf7f AH	72	}
	73
	74	zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
	75	if (!zpff)
	76	return -ENOMEM;
	77
	78	set_bit(FF_RUMBLE, dev->ffbit);
	79
987fbc1f	80	error = input_ff_create_memless(dev, zpff, zpff_play);
bb3caf7f AH	81	if (error) {
	82	kfree(zpff);
	83	return error;
	84	}
	85
	86	zpff->report = report;
	87	zpff->report->field[0]->value[0] = 0x00;
	88	zpff->report->field[1]->value[0] = 0x02;
	89	zpff->report->field[2]->value[0] = 0x00;
	90	zpff->report->field[3]->value[0] = 0x00;
d8814272	91	hid_hw_request(hid, zpff->report, HID_REQ_SET_REPORT);
bb3caf7f	92
4291ee30	93	hid_info(hid, "force feedback for Zeroplus based devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
bb3caf7f AH	94
	95	return 0;
	96	}
0f6f4319 JK	97	#else
	98	static inline int zpff_init(struct hid_device *hid)
	99	{
	100	return 0;
	101	}
	102	#endif
987fbc1f JS	103
	104	static int zp_probe(struct hid_device hdev, const struct hid_device_id id)
	105	{
	106	int ret;
	107
	108	ret = hid_parse(hdev);
	109	if (ret) {
4291ee30	110	hid_err(hdev, "parse failed\n");
987fbc1f JS	111	goto err;
	112	}
	113
	114	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
	115	if (ret) {
4291ee30	116	hid_err(hdev, "hw start failed\n");
987fbc1f JS	117	goto err;
	118	}
	119
	120	zpff_init(hdev);
	121
	122	return 0;
	123	err:
	124	return ret;
	125	}
	126
	127	static const struct hid_device_id zp_devices[] = {
	128	{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
	129	{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
	130	{ }
	131	};
	132	MODULE_DEVICE_TABLE(hid, zp_devices);
	133
	134	static struct hid_driver zp_driver = {
	135	.name = "zeroplus",
	136	.id_table = zp_devices,
	137	.probe = zp_probe,
	138	};
f425458e	139	module_hid_driver(zp_driver);
987fbc1f	140
987fbc1f	141	MODULE_LICENSE("GPL");