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

/*
 *  Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.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.
 */

#include <linux/kernel.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/module.h>
#include <asm/unaligned.h>
#include "hid-ids.h"

/* ALPS Device Product ID */
#define HID_PRODUCT_ID_T3_BTNLESS	0xD0C0
#define HID_PRODUCT_ID_COSMO		0x1202
#define HID_PRODUCT_ID_U1_PTP_1		0x1207
#define HID_PRODUCT_ID_U1			0x1209
#define HID_PRODUCT_ID_U1_PTP_2		0x120A
#define HID_PRODUCT_ID_U1_DUAL		0x120B
#define HID_PRODUCT_ID_T4_BTNLESS	0x120C

#define DEV_SINGLEPOINT				0x01
#define DEV_DUALPOINT				0x02

#define U1_MOUSE_REPORT_ID			0x01 /* Mouse data ReportID */
#define U1_ABSOLUTE_REPORT_ID		0x03 /* Absolute data ReportID */
#define U1_FEATURE_REPORT_ID		0x05 /* Feature ReportID */
#define U1_SP_ABSOLUTE_REPORT_ID	0x06 /* Feature ReportID */

#define U1_FEATURE_REPORT_LEN		0x08 /* Feature Report Length */
#define U1_FEATURE_REPORT_LEN_ALL	0x0A
#define U1_CMD_REGISTER_READ		0xD1
#define U1_CMD_REGISTER_WRITE		0xD2

#define	U1_DEVTYPE_SP_SUPPORT		0x10 /* SP Support */
#define	U1_DISABLE_DEV				0x01
#define U1_TP_ABS_MODE				0x02
#define	U1_SP_ABS_MODE				0x80

#define ADDRESS_U1_DEV_CTRL_1	0x00800040
#define ADDRESS_U1_DEVICE_TYP	0x00800043
#define ADDRESS_U1_NUM_SENS_X	0x00800047
#define ADDRESS_U1_NUM_SENS_Y	0x00800048
#define ADDRESS_U1_PITCH_SENS_X	0x00800049
#define ADDRESS_U1_PITCH_SENS_Y	0x0080004A
#define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
#define ADDRESS_U1_PAD_BTN		0x00800052
#define ADDRESS_U1_SP_BTN		0x0080009F

#define MAX_TOUCHES	5

/**
 * struct u1_data
 *
 * @input: pointer to the kernel input device
 * @input2: pointer to the kernel input2 device
 * @hdev: pointer to the struct hid_device
 *
 * @dev_type: device type
 * @max_fingers: total number of fingers
 * @has_sp: boolean of sp existense
 * @sp_btn_info: button information
 * @x_active_len_mm: active area length of X (mm)
 * @y_active_len_mm: active area length of Y (mm)
 * @x_max: maximum x coordinate value
 * @y_max: maximum y coordinate value
 * @x_min: minimum x coordinate value
 * @y_min: minimum y coordinate value
 * @btn_cnt: number of buttons
 * @sp_btn_cnt: number of stick buttons
 */
struct u1_dev {
	struct input_dev *input;
	struct input_dev *input2;
	struct hid_device *hdev;

	u8  max_fingers;
	u8  has_sp;
	u8	sp_btn_info;
	u32	x_active_len_mm;
	u32	y_active_len_mm;
	u32	x_max;
	u32	y_max;
	u32	x_min;
	u32	y_min;
	u32	btn_cnt;
	u32	sp_btn_cnt;
};

static int u1_read_write_register(struct hid_device *hdev, u32 address,
	u8 *read_val, u8 write_val, bool read_flag)
{
	int ret, i;
	u8 check_sum;
	u8 *input;
	u8 *readbuf;

	input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
	if (!input)
		return -ENOMEM;

	input[0] = U1_FEATURE_REPORT_ID;
	if (read_flag) {
		input[1] = U1_CMD_REGISTER_READ;
		input[6] = 0x00;
	} else {
		input[1] = U1_CMD_REGISTER_WRITE;
		input[6] = write_val;
	}

	put_unaligned_le32(address, input + 2);

	/* Calculate the checksum */
	check_sum = U1_FEATURE_REPORT_LEN_ALL;
	for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
		check_sum += input[i];

	input[7] = check_sum;
	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
			U1_FEATURE_REPORT_LEN,
			HID_FEATURE_REPORT, HID_REQ_SET_REPORT);

	if (ret < 0) {
		dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
		goto exit;
	}

	if (read_flag) {
		readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
		if (!readbuf) {
			ret = -ENOMEM;
			goto exit;
		}

		ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
				U1_FEATURE_REPORT_LEN,
				HID_FEATURE_REPORT, HID_REQ_GET_REPORT);

		if (ret < 0) {
			dev_err(&hdev->dev, "failed read register (%d)\n", ret);
			kfree(readbuf);
			goto exit;
		}

		*read_val = readbuf[6];

		kfree(readbuf);
	}

	ret = 0;

exit:
	kfree(input);
	return ret;
}

static int alps_raw_event(struct hid_device *hdev,
		struct hid_report *report, u8 *data, int size)
{
	unsigned int x, y, z;
	int i;
	short sp_x, sp_y;
	struct u1_dev *hdata = hid_get_drvdata(hdev);

	switch (data[0]) {
	case U1_MOUSE_REPORT_ID:
		break;
	case U1_FEATURE_REPORT_ID:
		break;
	case U1_ABSOLUTE_REPORT_ID:
		for (i = 0; i < MAX_TOUCHES; i++) {
			u8 *contact = &data[i * 5];

			x = get_unaligned_le16(contact + 3);
			y = get_unaligned_le16(contact + 5);
			z = contact[7] & 0x7F;

			input_mt_slot(hdata->input, i);

			if (z != 0) {
				input_mt_report_slot_state(hdata->input,
					MT_TOOL_FINGER, 1);
				input_report_abs(hdata->input,
					ABS_MT_POSITION_X, x);
				input_report_abs(hdata->input,
					ABS_MT_POSITION_Y, y);
				input_report_abs(hdata->input,
					ABS_MT_PRESSURE, z);
			} else {
				input_mt_report_slot_state(hdata->input,
					MT_TOOL_FINGER, 0);
			}
		}

		input_mt_sync_frame(hdata->input);

		input_report_key(hdata->input, BTN_LEFT,
			data[1] & 0x1);
		input_report_key(hdata->input, BTN_RIGHT,
			(data[1] & 0x2));
		input_report_key(hdata->input, BTN_MIDDLE,
			(data[1] & 0x4));

		input_sync(hdata->input);

		return 1;

	case U1_SP_ABSOLUTE_REPORT_ID:
		sp_x = get_unaligned_le16(data+2);
		sp_y = get_unaligned_le16(data+4);

		sp_x = sp_x / 8;
		sp_y = sp_y / 8;

		input_report_rel(hdata->input2, REL_X, sp_x);
		input_report_rel(hdata->input2, REL_Y, sp_y);

		input_report_key(hdata->input2, BTN_LEFT,
			data[1] & 0x1);
		input_report_key(hdata->input2, BTN_RIGHT,
			(data[1] & 0x2));
		input_report_key(hdata->input2, BTN_MIDDLE,
			(data[1] & 0x4));

		input_sync(hdata->input2);

		return 1;
	}

	return 0;
}

#ifdef CONFIG_PM
static int alps_post_reset(struct hid_device *hdev)
{
	return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
				NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
}

static int alps_post_resume(struct hid_device *hdev)
{
	return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
				NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
}
#endif /* CONFIG_PM */

static int u1_init(struct hid_device *hdev, struct u1_dev *pri_data)
{
	int ret;
	u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
	u8 pitch_x, pitch_y, resolution;

	/* Device initialization */
	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
			&dev_ctrl, 0, true);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
		goto exit;
	}

	dev_ctrl &= ~U1_DISABLE_DEV;
	dev_ctrl |= U1_TP_ABS_MODE;
	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
			NULL, dev_ctrl, false);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
		goto exit;
	}

	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
			&sen_line_num_x, 0, true);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
		goto exit;
	}

	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
			&sen_line_num_y, 0, true);
		if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
		goto exit;
	}

	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
			&pitch_x, 0, true);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
		goto exit;
	}

	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
			&pitch_y, 0, true);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
		goto exit;
	}

	ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
		&resolution, 0, true);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
		goto exit;
	}
	pri_data->x_active_len_mm =
		(pitch_x * (sen_line_num_x - 1)) / 10;
	pri_data->y_active_len_mm =
		(pitch_y * (sen_line_num_y - 1)) / 10;

	pri_data->x_max =
		(resolution << 2) * (sen_line_num_x - 1);
	pri_data->x_min = 1;
	pri_data->y_max =
		(resolution << 2) * (sen_line_num_y - 1);
	pri_data->y_min = 1;

	ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
			&tmp, 0, true);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
		goto exit;
	}
	if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
		pri_data->btn_cnt = (tmp & 0x0F);
	} else {
		/* Button pad */
		pri_data->btn_cnt = 1;
	}

	pri_data->has_sp = 0;
	/* Check StickPointer device */
	ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
			&tmp, 0, true);
	if (ret < 0) {
		dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
		goto exit;
	}
	if (tmp & U1_DEVTYPE_SP_SUPPORT) {
		dev_ctrl |= U1_SP_ABS_MODE;
		ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
			NULL, dev_ctrl, false);
		if (ret < 0) {
			dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
			goto exit;
		}

		ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
			&pri_data->sp_btn_info, 0, true);
		if (ret < 0) {
			dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
			goto exit;
		}
		pri_data->has_sp = 1;
	}
	pri_data->max_fingers = 5;
exit:
	return ret;
}

static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
{
	struct u1_dev *data = hid_get_drvdata(hdev);
	struct input_dev *input = hi->input, *input2;
	int ret;
	int res_x, res_y, i;

	data->input = input;

	hid_dbg(hdev, "Opening low level driver\n");
	ret = hid_hw_open(hdev);
	if (ret)
		return ret;

	/* Allow incoming hid reports */
	hid_device_io_start(hdev);

	ret = u1_init(hdev, data);

	if (ret)
		goto exit;

	__set_bit(EV_ABS, input->evbit);
	input_set_abs_params(input, ABS_MT_POSITION_X,
						data->x_min, data->x_max, 0, 0);
	input_set_abs_params(input, ABS_MT_POSITION_Y,
						data->y_min, data->y_max, 0, 0);

	if (data->x_active_len_mm && data->y_active_len_mm) {
		res_x = (data->x_max - 1) / data->x_active_len_mm;
		res_y = (data->y_max - 1) / data->y_active_len_mm;

		input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
		input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
	}

	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);

	input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);

	__set_bit(EV_KEY, input->evbit);

	if (data->btn_cnt == 1)
		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);

	for (i = 0; i < data->btn_cnt; i++)
		__set_bit(BTN_LEFT + i, input->keybit);

	/* Stick device initialization */
	if (data->has_sp) {
		input2 = input_allocate_device();
		if (!input2) {
			input_free_device(input2);
			goto exit;
		}

		data->input2 = input2;
		input2->phys = input->phys;
		input2->name = "DualPoint Stick";
		input2->id.bustype = BUS_I2C;
		input2->id.vendor  = input->id.vendor;
		input2->id.product = input->id.product;
		input2->id.version = input->id.version;
		input2->dev.parent = input->dev.parent;

		__set_bit(EV_KEY, input2->evbit);
		data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
		for (i = 0; i < data->sp_btn_cnt; i++)
			__set_bit(BTN_LEFT + i, input2->keybit);

		__set_bit(EV_REL, input2->evbit);
		__set_bit(REL_X, input2->relbit);
		__set_bit(REL_Y, input2->relbit);
		__set_bit(INPUT_PROP_POINTER, input2->propbit);
		__set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);

		if (input_register_device(data->input2)) {
			input_free_device(input2);
			goto exit;
		}
	}

exit:
	hid_device_io_stop(hdev);
	hid_hw_close(hdev);
	return ret;
}

static int alps_input_mapping(struct hid_device *hdev,
		struct hid_input *hi, struct hid_field *field,
		struct hid_usage *usage, unsigned long **bit, int *max)
{
	return -1;
}

static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	struct u1_dev *data = NULL;
	int ret;

	data = devm_kzalloc(&hdev->dev, sizeof(struct u1_dev), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->hdev = hdev;
	hid_set_drvdata(hdev, data);

	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;

	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;
}

static void alps_remove(struct hid_device *hdev)
{
	hid_hw_stop(hdev);
}

static const struct hid_device_id alps_id[] = {
	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
	{ }
};
MODULE_DEVICE_TABLE(hid, alps_id);

static struct hid_driver alps_driver = {
	.name = "hid-alps",
	.id_table		= alps_id,
	.probe			= alps_probe,
	.remove			= alps_remove,
	.raw_event		= alps_raw_event,
	.input_mapping		= alps_input_mapping,
	.input_configured	= alps_input_configured,
#ifdef CONFIG_PM
	.resume			= alps_post_resume,
	.reset_resume		= alps_post_reset,
#endif
};

module_hid_driver(alps_driver);

MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
MODULE_DESCRIPTION("ALPS HID driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
2562756d MO	1	/*
	2	* Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License as published by the Free
	6	* Software Foundation; either version 2 of the License, or (at your option)
	7	* any later version.
	8	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/hid.h>
	12	#include <linux/input.h>
	13	#include <linux/input/mt.h>
	14	#include <linux/module.h>
	15	#include <asm/unaligned.h>
	16	#include "hid-ids.h"
	17
	18	/* ALPS Device Product ID */
	19	#define HID_PRODUCT_ID_T3_BTNLESS 0xD0C0
	20	#define HID_PRODUCT_ID_COSMO 0x1202
	21	#define HID_PRODUCT_ID_U1_PTP_1 0x1207
	22	#define HID_PRODUCT_ID_U1 0x1209
	23	#define HID_PRODUCT_ID_U1_PTP_2 0x120A
	24	#define HID_PRODUCT_ID_U1_DUAL 0x120B
	25	#define HID_PRODUCT_ID_T4_BTNLESS 0x120C
	26
	27	#define DEV_SINGLEPOINT 0x01
	28	#define DEV_DUALPOINT 0x02
	29
	30	#define U1_MOUSE_REPORT_ID 0x01 /* Mouse data ReportID */
	31	#define U1_ABSOLUTE_REPORT_ID 0x03 /* Absolute data ReportID */
	32	#define U1_FEATURE_REPORT_ID 0x05 /* Feature ReportID */
	33	#define U1_SP_ABSOLUTE_REPORT_ID 0x06 /* Feature ReportID */
	34
	35	#define U1_FEATURE_REPORT_LEN 0x08 /* Feature Report Length */
	36	#define U1_FEATURE_REPORT_LEN_ALL 0x0A
	37	#define U1_CMD_REGISTER_READ 0xD1
	38	#define U1_CMD_REGISTER_WRITE 0xD2
	39
	40	#define U1_DEVTYPE_SP_SUPPORT 0x10 /* SP Support */
	41	#define U1_DISABLE_DEV 0x01
	42	#define U1_TP_ABS_MODE 0x02
	43	#define U1_SP_ABS_MODE 0x80
	44
	45	#define ADDRESS_U1_DEV_CTRL_1 0x00800040
	46	#define ADDRESS_U1_DEVICE_TYP 0x00800043
	47	#define ADDRESS_U1_NUM_SENS_X 0x00800047
	48	#define ADDRESS_U1_NUM_SENS_Y 0x00800048
	49	#define ADDRESS_U1_PITCH_SENS_X 0x00800049
	50	#define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
	51	#define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
	52	#define ADDRESS_U1_PAD_BTN 0x00800052
	53	#define ADDRESS_U1_SP_BTN 0x0080009F
	54
	55	#define MAX_TOUCHES 5
	56
	57	/**
	58	* struct u1_data
	59	*
	60	* @input: pointer to the kernel input device
	61	* @input2: pointer to the kernel input2 device
	62	* @hdev: pointer to the struct hid_device
	63	*
2562756d	64	* @dev_type: device type
5992262d MO	65	* @max_fingers: total number of fingers
	66	* @has_sp: boolean of sp existense
	67	* @sp_btn_info: button information
2562756d MO	68	* @x_active_len_mm: active area length of X (mm)
	69	* @y_active_len_mm: active area length of Y (mm)
	70	* @x_max: maximum x coordinate value
	71	* @y_max: maximum y coordinate value
c7083d3f MO	72	* @x_min: minimum x coordinate value
c7083d3f MO	73	* @y_min: minimum y coordinate value
2562756d MO	74	* @btn_cnt: number of buttons
	75	* @sp_btn_cnt: number of stick buttons
	76	*/
	77	struct u1_dev {
	78	struct input_dev *input;
	79	struct input_dev *input2;
	80	struct hid_device *hdev;
	81
5992262d MO	82	u8 max_fingers;
5992262d MO	83	u8 has_sp;
2562756d MO	84	u8 sp_btn_info;
	85	u32 x_active_len_mm;
	86	u32 y_active_len_mm;
	87	u32 x_max;
	88	u32 y_max;
c7083d3f MO	89	u32 x_min;
c7083d3f MO	90	u32 y_min;
2562756d MO	91	u32 btn_cnt;
	92	u32 sp_btn_cnt;
	93	};
	94
2562756d MO	95	static int u1_read_write_register(struct hid_device *hdev, u32 address,
	96	u8 *read_val, u8 write_val, bool read_flag)
	97	{
	98	int ret, i;
	99	u8 check_sum;
	100	u8 *input;
	101	u8 *readbuf;
	102
819d64e5	103	input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
2562756d MO	104	if (!input)
	105	return -ENOMEM;
	106
2562756d MO	107	input[0] = U1_FEATURE_REPORT_ID;
	108	if (read_flag) {
	109	input[1] = U1_CMD_REGISTER_READ;
	110	input[6] = 0x00;
	111	} else {
	112	input[1] = U1_CMD_REGISTER_WRITE;
	113	input[6] = write_val;
	114	}
	115
	116	put_unaligned_le32(address, input + 2);
	117
	118	/* Calculate the checksum */
	119	check_sum = U1_FEATURE_REPORT_LEN_ALL;
	120	for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
	121	check_sum += input[i];
	122
	123	input[7] = check_sum;
	124	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
819d64e5 MO	125	U1_FEATURE_REPORT_LEN,
819d64e5 MO	126	HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
2562756d MO	127
	128	if (ret < 0) {
	129	dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
	130	goto exit;
	131	}
	132
	133	if (read_flag) {
819d64e5 MO	134	readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
819d64e5 MO	135	if (!readbuf) {
7ee2eaa3 AL	136	ret = -ENOMEM;
7ee2eaa3 AL	137	goto exit;
819d64e5 MO	138	}
819d64e5 MO	139
2562756d	140	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
819d64e5	141	U1_FEATURE_REPORT_LEN,
63b3a7d0	142	HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
2562756d MO	143
	144	if (ret < 0) {
	145	dev_err(&hdev->dev, "failed read register (%d)\n", ret);
7ee2eaa3	146	kfree(readbuf);
2562756d MO	147	goto exit;
	148	}
	149
	150	*read_val = readbuf[6];
819d64e5 MO	151
819d64e5 MO	152	kfree(readbuf);
2562756d MO	153	}
2562756d MO	154
819d64e5	155	ret = 0;
2562756d MO	156
	157	exit:
	158	kfree(input);
2562756d MO	159	return ret;
	160	}
	161
	162	static int alps_raw_event(struct hid_device *hdev,
	163	struct hid_report report, u8 data, int size)
	164	{
819d64e5 MO	165	unsigned int x, y, z;
	166	int i;
	167	short sp_x, sp_y;
2562756d MO	168	struct u1_dev *hdata = hid_get_drvdata(hdev);
	169
	170	switch (data[0]) {
	171	case U1_MOUSE_REPORT_ID:
	172	break;
	173	case U1_FEATURE_REPORT_ID:
	174	break;
	175	case U1_ABSOLUTE_REPORT_ID:
	176	for (i = 0; i < MAX_TOUCHES; i++) {
819d64e5 MO	177	u8 contact = &data[i 5];
	178
	179	x = get_unaligned_le16(contact + 3);
	180	y = get_unaligned_le16(contact + 5);
	181	z = contact[7] & 0x7F;
2562756d MO	182
	183	input_mt_slot(hdata->input, i);
	184
819d64e5	185	if (z != 0) {
2562756d MO	186	input_mt_report_slot_state(hdata->input,
2562756d MO	187	MT_TOOL_FINGER, 1);
9a54cf46 MO	188	input_report_abs(hdata->input,
	189	ABS_MT_POSITION_X, x);
	190	input_report_abs(hdata->input,
	191	ABS_MT_POSITION_Y, y);
	192	input_report_abs(hdata->input,
	193	ABS_MT_PRESSURE, z);
2562756d MO	194	} else {
	195	input_mt_report_slot_state(hdata->input,
	196	MT_TOOL_FINGER, 0);
2562756d	197	}
2562756d MO	198	}
	199
	200	input_mt_sync_frame(hdata->input);
2562756d	201
819d64e5 MO	202	input_report_key(hdata->input, BTN_LEFT,
	203	data[1] & 0x1);
	204	input_report_key(hdata->input, BTN_RIGHT,
	205	(data[1] & 0x2));
	206	input_report_key(hdata->input, BTN_MIDDLE,
	207	(data[1] & 0x4));
	208
	209	input_sync(hdata->input);
2562756d MO	210
	211	return 1;
	212
	213	case U1_SP_ABSOLUTE_REPORT_ID:
819d64e5 MO	214	sp_x = get_unaligned_le16(data+2);
819d64e5 MO	215	sp_y = get_unaligned_le16(data+4);
2562756d MO	216
	217	sp_x = sp_x / 8;
	218	sp_y = sp_y / 8;
	219
819d64e5 MO	220	input_report_rel(hdata->input2, REL_X, sp_x);
819d64e5 MO	221	input_report_rel(hdata->input2, REL_Y, sp_y);
2562756d	222
819d64e5 MO	223	input_report_key(hdata->input2, BTN_LEFT,
	224	data[1] & 0x1);
	225	input_report_key(hdata->input2, BTN_RIGHT,
	226	(data[1] & 0x2));
	227	input_report_key(hdata->input2, BTN_MIDDLE,
	228	(data[1] & 0x4));
2562756d	229
819d64e5	230	input_sync(hdata->input2);
2562756d MO	231
	232	return 1;
	233	}
	234
	235	return 0;
	236	}
	237
	238	#ifdef CONFIG_PM
	239	static int alps_post_reset(struct hid_device *hdev)
	240	{
	241	return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
04fd4cb0	242	NULL, U1_TP_ABS_MODE \| U1_SP_ABS_MODE, false);
2562756d MO	243	}
	244
	245	static int alps_post_resume(struct hid_device *hdev)
	246	{
	247	return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
04fd4cb0	248	NULL, U1_TP_ABS_MODE \| U1_SP_ABS_MODE, false);
2562756d MO	249	}
	250	#endif /* CONFIG_PM */
	251
5d8c720d	252	static int u1_init(struct hid_device hdev, struct u1_dev pri_data)
2562756d	253	{
2562756d	254	int ret;
5992262d MO	255	u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
5992262d MO	256	u8 pitch_x, pitch_y, resolution;
2562756d MO	257
	258	/* Device initialization */
	259	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
5992262d	260	&dev_ctrl, 0, true);
2562756d MO	261	if (ret < 0) {
	262	dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
	263	goto exit;
	264	}
	265
5992262d MO	266	dev_ctrl &= ~U1_DISABLE_DEV;
5992262d MO	267	dev_ctrl \|= U1_TP_ABS_MODE;
2562756d	268	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
5992262d	269	NULL, dev_ctrl, false);
2562756d MO	270	if (ret < 0) {
	271	dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
	272	goto exit;
	273	}
	274
	275	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
5992262d	276	&sen_line_num_x, 0, true);
2562756d MO	277	if (ret < 0) {
	278	dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
	279	goto exit;
	280	}
	281
	282	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
5992262d	283	&sen_line_num_y, 0, true);
2562756d MO	284	if (ret < 0) {
	285	dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
	286	goto exit;
	287	}
	288
	289	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
5992262d	290	&pitch_x, 0, true);
2562756d MO	291	if (ret < 0) {
	292	dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
	293	goto exit;
	294	}
	295
	296	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
5992262d	297	&pitch_y, 0, true);
2562756d MO	298	if (ret < 0) {
	299	dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
	300	goto exit;
	301	}
	302
	303	ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
5992262d	304	&resolution, 0, true);
2562756d MO	305	if (ret < 0) {
	306	dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
	307	goto exit;
	308	}
5d8c720d	309	pri_data->x_active_len_mm =
5992262d	310	(pitch_x * (sen_line_num_x - 1)) / 10;
5d8c720d	311	pri_data->y_active_len_mm =
5992262d	312	(pitch_y * (sen_line_num_y - 1)) / 10;
5d8c720d MO	313
5d8c720d MO	314	pri_data->x_max =
5992262d	315	(resolution << 2) * (sen_line_num_x - 1);
c7083d3f	316	pri_data->x_min = 1;
5d8c720d	317	pri_data->y_max =
5992262d	318	(resolution << 2) * (sen_line_num_y - 1);
c7083d3f	319	pri_data->y_min = 1;
2562756d MO	320
2562756d MO	321	ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
5992262d	322	&tmp, 0, true);
2562756d MO	323	if (ret < 0) {
	324	dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
	325	goto exit;
	326	}
5992262d MO	327	if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
5992262d MO	328	pri_data->btn_cnt = (tmp & 0x0F);
c7083d3f MO	329	} else {
	330	/* Button pad */
	331	pri_data->btn_cnt = 1;
	332	}
2562756d	333
5d8c720d	334	pri_data->has_sp = 0;
2562756d MO	335	/* Check StickPointer device */
2562756d MO	336	ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
5992262d	337	&tmp, 0, true);
2562756d MO	338	if (ret < 0) {
	339	dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
	340	goto exit;
	341	}
5992262d MO	342	if (tmp & U1_DEVTYPE_SP_SUPPORT) {
5992262d MO	343	dev_ctrl \|= U1_SP_ABS_MODE;
5d8c720d	344	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
5992262d	345	NULL, dev_ctrl, false);
5d8c720d MO	346	if (ret < 0) {
	347	dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
	348	goto exit;
	349	}
	350
	351	ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
	352	&pri_data->sp_btn_info, 0, true);
	353	if (ret < 0) {
	354	dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
	355	goto exit;
	356	}
	357	pri_data->has_sp = 1;
	358	}
c7083d3f	359	pri_data->max_fingers = 5;
5d8c720d MO	360	exit:
	361	return ret;
	362	}
	363
	364	static int alps_input_configured(struct hid_device hdev, struct hid_input hi)
	365	{
	366	struct u1_dev *data = hid_get_drvdata(hdev);
	367	struct input_dev input = hi->input, input2;
	368	int ret;
	369	int res_x, res_y, i;
	370
	371	data->input = input;
	372
	373	hid_dbg(hdev, "Opening low level driver\n");
	374	ret = hid_hw_open(hdev);
	375	if (ret)
	376	return ret;
	377
	378	/* Allow incoming hid reports */
	379	hid_device_io_start(hdev);
	380
	381	ret = u1_init(hdev, data);
	382
	383	if (ret)
	384	goto exit;
2562756d MO	385
2562756d MO	386	__set_bit(EV_ABS, input->evbit);
c7083d3f MO	387	input_set_abs_params(input, ABS_MT_POSITION_X,
	388	data->x_min, data->x_max, 0, 0);
	389	input_set_abs_params(input, ABS_MT_POSITION_Y,
	390	data->y_min, data->y_max, 0, 0);
2562756d	391
ce6abcf8 MO	392	if (data->x_active_len_mm && data->y_active_len_mm) {
	393	res_x = (data->x_max - 1) / data->x_active_len_mm;
	394	res_y = (data->y_max - 1) / data->y_active_len_mm;
2562756d MO	395
	396	input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
	397	input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
	398	}
	399
	400	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
	401
c7083d3f	402	input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
2562756d MO	403
2562756d MO	404	__set_bit(EV_KEY, input->evbit);
c7083d3f MO	405
c7083d3f MO	406	if (data->btn_cnt == 1)
2562756d	407	__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
2562756d	408
ce6abcf8	409	for (i = 0; i < data->btn_cnt; i++)
2562756d MO	410	__set_bit(BTN_LEFT + i, input->keybit);
2562756d MO	411
2562756d	412	/* Stick device initialization */
5d8c720d	413	if (data->has_sp) {
2562756d MO	414	input2 = input_allocate_device();
2562756d MO	415	if (!input2) {
c7083d3f	416	input_free_device(input2);
2562756d MO	417	goto exit;
	418	}
	419
819d64e5	420	data->input2 = input2;
2562756d MO	421	input2->phys = input->phys;
	422	input2->name = "DualPoint Stick";
	423	input2->id.bustype = BUS_I2C;
	424	input2->id.vendor = input->id.vendor;
	425	input2->id.product = input->id.product;
	426	input2->id.version = input->id.version;
	427	input2->dev.parent = input->dev.parent;
	428
	429	__set_bit(EV_KEY, input2->evbit);
ce6abcf8 MO	430	data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
ce6abcf8 MO	431	for (i = 0; i < data->sp_btn_cnt; i++)
2562756d MO	432	__set_bit(BTN_LEFT + i, input2->keybit);
	433
	434	__set_bit(EV_REL, input2->evbit);
	435	__set_bit(REL_X, input2->relbit);
	436	__set_bit(REL_Y, input2->relbit);
	437	__set_bit(INPUT_PROP_POINTER, input2->propbit);
	438	__set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
	439
c7083d3f	440	if (input_register_device(data->input2)) {
2562756d MO	441	input_free_device(input2);
	442	goto exit;
	443	}
	444	}
	445
	446	exit:
	447	hid_device_io_stop(hdev);
	448	hid_hw_close(hdev);
	449	return ret;
	450	}
	451
	452	static int alps_input_mapping(struct hid_device *hdev,
	453	struct hid_input hi, struct hid_field field,
	454	struct hid_usage usage, unsigned long bit, int max)
	455	{
	456	return -1;
	457	}
	458
	459	static int alps_probe(struct hid_device hdev, const struct hid_device_id id)
	460	{
	461	struct u1_dev *data = NULL;
	462	int ret;
	463
	464	data = devm_kzalloc(&hdev->dev, sizeof(struct u1_dev), GFP_KERNEL);
	465	if (!data)
	466	return -ENOMEM;
	467
	468	data->hdev = hdev;
	469	hid_set_drvdata(hdev, data);
	470
	471	hdev->quirks \|= HID_QUIRK_NO_INIT_REPORTS;
	472
	473	ret = hid_parse(hdev);
	474	if (ret) {
	475	hid_err(hdev, "parse failed\n");
	476	return ret;
	477	}
	478
	479	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	480	if (ret) {
	481	hid_err(hdev, "hw start failed\n");
	482	return ret;
	483	}
	484
	485	return 0;
	486	}
	487
	488	static void alps_remove(struct hid_device *hdev)
	489	{
	490	hid_hw_stop(hdev);
2562756d MO	491	}
	492
	493	static const struct hid_device_id alps_id[] = {
	494	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
819d64e5	495	USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
2562756d MO	496	{ }
	497	};
	498	MODULE_DEVICE_TABLE(hid, alps_id);
	499
	500	static struct hid_driver alps_driver = {
	501	.name = "hid-alps",
	502	.id_table = alps_id,
	503	.probe = alps_probe,
	504	.remove = alps_remove,
	505	.raw_event = alps_raw_event,
	506	.input_mapping = alps_input_mapping,
	507	.input_configured = alps_input_configured,
	508	#ifdef CONFIG_PM
	509	.resume = alps_post_resume,
	510	.reset_resume = alps_post_reset,
	511	#endif
	512	};
	513
	514	module_hid_driver(alps_driver);
	515
	516	MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
	517	MODULE_DESCRIPTION("ALPS HID driver");
	518	MODULE_LICENSE("GPL");