[linux-2.6-block.git] / drivers / input / mouse / cypress_ps2.c

/*
 * Cypress Trackpad PS/2 mouse driver
 *
 * Copyright (c) 2012 Cypress Semiconductor Corporation.
 *
 * Author:
 *   Dudley Du <dudl@cypress.com>
 *
 * Additional contributors include:
 *   Kamal Mostafa <kamal@canonical.com>
 *   Kyle Fazzari <git@status.e4ward.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/sched.h>
#include <linux/wait.h>

#include "cypress_ps2.h"

#undef CYTP_DEBUG_VERBOSE  /* define this and DEBUG for more verbose dump */

static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n)
{
	struct cytp_data *cytp = psmouse->private;
	cytp->pkt_size = n;
}

static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200};
static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03};

static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;

	if (ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT) < 0) {
		psmouse_dbg(psmouse,
				"sending command 0x%02x failed, resp 0x%02x\n",
				value & 0xff, ps2dev->nak);
		if (ps2dev->nak == CYTP_PS2_RETRY)
			return CYTP_PS2_RETRY;
		else
			return CYTP_PS2_ERROR;
	}

#ifdef CYTP_DEBUG_VERBOSE
	psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n",
			value & 0xff);
#endif

	return 0;
}

static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
			       unsigned char data)
{
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	int tries = CYTP_PS2_CMD_TRIES;
	int rc;

	ps2_begin_command(ps2dev);

	do {
		/*
		 * Send extension command byte (0xE8 or 0xF3).
		 * If sending the command fails, send recovery command
		 * to make the device return to the ready state.
		 */
		rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff);
		if (rc == CYTP_PS2_RETRY) {
			rc = cypress_ps2_sendbyte(psmouse, 0x00);
			if (rc == CYTP_PS2_RETRY)
				rc = cypress_ps2_sendbyte(psmouse, 0x0a);
		}
		if (rc == CYTP_PS2_ERROR)
			continue;

		rc = cypress_ps2_sendbyte(psmouse, data);
		if (rc == CYTP_PS2_RETRY)
			rc = cypress_ps2_sendbyte(psmouse, data);
		if (rc == CYTP_PS2_ERROR)
			continue;
		else
			break;
	} while (--tries > 0);

	ps2_end_command(ps2dev);

	return rc;
}

static int cypress_ps2_read_cmd_status(struct psmouse *psmouse,
				       unsigned char cmd,
				       unsigned char *param)
{
	int rc;
	struct ps2dev *ps2dev = &psmouse->ps2dev;
	enum psmouse_state old_state;
	int pktsize;

	ps2_begin_command(&psmouse->ps2dev);

	old_state = psmouse->state;
	psmouse->state = PSMOUSE_CMD_MODE;
	psmouse->pktcnt = 0;

	pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3;
	memset(param, 0, pktsize);

	rc = cypress_ps2_sendbyte(psmouse, 0xe9);
	if (rc < 0)
		goto out;

	wait_event_timeout(ps2dev->wait,
			(psmouse->pktcnt >= pktsize),
			msecs_to_jiffies(CYTP_CMD_TIMEOUT));

	memcpy(param, psmouse->packet, pktsize);

	psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n",
			cmd, pktsize, param);

out:
	psmouse->state = old_state;
	psmouse->pktcnt = 0;

	ps2_end_command(&psmouse->ps2dev);

	return rc;
}

static bool cypress_verify_cmd_state(struct psmouse *psmouse,
				     unsigned char cmd, unsigned char *param)
{
	bool rate_match = false;
	bool resolution_match = false;
	int i;

	/* callers will do further checking. */
	if (cmd == CYTP_CMD_READ_CYPRESS_ID ||
	    cmd == CYTP_CMD_STANDARD_MODE ||
	    cmd == CYTP_CMD_READ_TP_METRICS)
		return true;

	if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID &&
	    (param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) {
		for (i = 0; i < sizeof(cytp_resolution); i++)
			if (cytp_resolution[i] == param[1])
				resolution_match = true;

		for (i = 0; i < sizeof(cytp_rate); i++)
			if (cytp_rate[i] == param[2])
				rate_match = true;

		if (resolution_match && rate_match)
			return true;
	}

	psmouse_dbg(psmouse, "verify cmd state failed.\n");
	return false;
}

static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd,
				unsigned char *param)
{
	int tries = CYTP_PS2_CMD_TRIES;
	int rc;

	psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n",
		 cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd),
		 DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd));

	do {
		cypress_ps2_ext_cmd(psmouse,
				    PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd));
		cypress_ps2_ext_cmd(psmouse,
				    PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd));
		cypress_ps2_ext_cmd(psmouse,
				    PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd));
		cypress_ps2_ext_cmd(psmouse,
				    PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd));

		rc = cypress_ps2_read_cmd_status(psmouse, cmd, param);
		if (rc)
			continue;

		if (cypress_verify_cmd_state(psmouse, cmd, param))
			return 0;

	} while (--tries > 0);

	return -EIO;
}

int cypress_detect(struct psmouse *psmouse, bool set_properties)
{
	unsigned char param[3];

	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
		return -ENODEV;

	/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
	if (param[0] != 0x33 || param[1] != 0xCC)
		return -ENODEV;

	if (set_properties) {
		psmouse->vendor = "Cypress";
		psmouse->name = "Trackpad";
	}

	return 0;
}

static int cypress_read_fw_version(struct psmouse *psmouse)
{
	struct cytp_data *cytp = psmouse->private;
	unsigned char param[3];

	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
		return -ENODEV;

	/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
	if (param[0] != 0x33 || param[1] != 0xCC)
		return -ENODEV;

	cytp->fw_version = param[2] & FW_VERSION_MASX;
	cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0;

	/*
	 * Trackpad fw_version 11 (in Dell XPS12) yields a bogus response to
	 * CYTP_CMD_READ_TP_METRICS so do not try to use it. LP: #1103594.
	 */
	if (cytp->fw_version >= 11)
		cytp->tp_metrics_supported = 0;

	psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version);
	psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n",
		 cytp->tp_metrics_supported);

	return 0;
}

static int cypress_read_tp_metrics(struct psmouse *psmouse)
{
	struct cytp_data *cytp = psmouse->private;
	unsigned char param[8];

	/* set default values for tp metrics. */
	cytp->tp_width = CYTP_DEFAULT_WIDTH;
	cytp->tp_high = CYTP_DEFAULT_HIGH;
	cytp->tp_max_abs_x = CYTP_ABS_MAX_X;
	cytp->tp_max_abs_y = CYTP_ABS_MAX_Y;
	cytp->tp_min_pressure = CYTP_MIN_PRESSURE;
	cytp->tp_max_pressure = CYTP_MAX_PRESSURE;
	cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
	cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;

	if (!cytp->tp_metrics_supported)
		return 0;

	memset(param, 0, sizeof(param));
	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) {
		/* Update trackpad parameters. */
		cytp->tp_max_abs_x = (param[1] << 8) | param[0];
		cytp->tp_max_abs_y = (param[3] << 8) | param[2];
		cytp->tp_min_pressure = param[4];
		cytp->tp_max_pressure = param[5];
	}

	if (!cytp->tp_max_pressure ||
	    cytp->tp_max_pressure < cytp->tp_min_pressure ||
	    !cytp->tp_width || !cytp->tp_high ||
	    !cytp->tp_max_abs_x ||
	    cytp->tp_max_abs_x < cytp->tp_width ||
	    !cytp->tp_max_abs_y ||
	    cytp->tp_max_abs_y < cytp->tp_high)
		return -EINVAL;

	cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
	cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;

#ifdef CYTP_DEBUG_VERBOSE
	psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n");
	psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width);
	psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high);
	psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x);
	psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y);
	psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure);
	psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure);
	psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x);
	psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y);

	psmouse_dbg(psmouse, "tp_type_APA = %d\n",
			(param[6] & TP_METRICS_BIT_APA) ? 1 : 0);
	psmouse_dbg(psmouse, "tp_type_MTG = %d\n",
			(param[6] & TP_METRICS_BIT_MTG) ? 1 : 0);
	psmouse_dbg(psmouse, "tp_palm = %d\n",
			(param[6] & TP_METRICS_BIT_PALM) ? 1 : 0);
	psmouse_dbg(psmouse, "tp_stubborn = %d\n",
			(param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0);
	psmouse_dbg(psmouse, "tp_1f_jitter = %d\n",
			(param[6] & TP_METRICS_BIT_1F_JITTER) >> 2);
	psmouse_dbg(psmouse, "tp_2f_jitter = %d\n",
			(param[6] & TP_METRICS_BIT_2F_JITTER) >> 4);
	psmouse_dbg(psmouse, "tp_1f_spike = %d\n",
			param[7] & TP_METRICS_BIT_1F_SPIKE);
	psmouse_dbg(psmouse, "tp_2f_spike = %d\n",
			(param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2);
	psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n",
			(param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4);
#endif

	return 0;
}

static int cypress_query_hardware(struct psmouse *psmouse)
{
	int ret;

	ret = cypress_read_fw_version(psmouse);
	if (ret)
		return ret;

	ret = cypress_read_tp_metrics(psmouse);
	if (ret)
		return ret;

	return 0;
}

static int cypress_set_absolute_mode(struct psmouse *psmouse)
{
	struct cytp_data *cytp = psmouse->private;
	unsigned char param[3];

	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0)
		return -1;

	cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK)
			| CYTP_BIT_ABS_PRESSURE;
	cypress_set_packet_size(psmouse, 5);

	return 0;
}

/*
 * Reset trackpad device.
 * This is also the default mode when trackpad powered on.
 */
static void cypress_reset(struct psmouse *psmouse)
{
	struct cytp_data *cytp = psmouse->private;

	cytp->mode = 0;

	psmouse_reset(psmouse);
}

static int cypress_set_input_params(struct input_dev *input,
				    struct cytp_data *cytp)
{
	int ret;

	if (!cytp->tp_res_x || !cytp->tp_res_y)
		return -EINVAL;

	__set_bit(EV_ABS, input->evbit);
	input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0);
	input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0);
	input_set_abs_params(input, ABS_PRESSURE,
			     cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0);
	input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0);

	/* finger position */
	input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0);
	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0);
	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0);

	ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS,
			INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK);
	if (ret < 0)
		return ret;

	__set_bit(INPUT_PROP_SEMI_MT, input->propbit);

	input_abs_set_res(input, ABS_X, cytp->tp_res_x);
	input_abs_set_res(input, ABS_Y, cytp->tp_res_y);

	input_abs_set_res(input, ABS_MT_POSITION_X, cytp->tp_res_x);
	input_abs_set_res(input, ABS_MT_POSITION_Y, cytp->tp_res_y);

	__set_bit(BTN_TOUCH, input->keybit);
	__set_bit(BTN_TOOL_FINGER, input->keybit);
	__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
	__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
	__set_bit(BTN_TOOL_QUADTAP, input->keybit);
	__set_bit(BTN_TOOL_QUINTTAP, input->keybit);

	__clear_bit(EV_REL, input->evbit);
	__clear_bit(REL_X, input->relbit);
	__clear_bit(REL_Y, input->relbit);

	__set_bit(EV_KEY, input->evbit);
	__set_bit(BTN_LEFT, input->keybit);
	__set_bit(BTN_RIGHT, input->keybit);
	__set_bit(BTN_MIDDLE, input->keybit);

	input_set_drvdata(input, cytp);

	return 0;
}

static int cypress_get_finger_count(unsigned char header_byte)
{
	unsigned char bits6_7;
	int finger_count;

	bits6_7 = header_byte >> 6;
	finger_count = bits6_7 & 0x03;

	if (finger_count == 1)
		return 1;

	if (header_byte & ABS_HSCROLL_BIT) {
		/* HSCROLL gets added on to 0 finger count. */
		switch (finger_count) {
			case 0:	return 4;
			case 2: return 5;
			default:
				/* Invalid contact (e.g. palm). Ignore it. */
				return 0;
		}
	}

	return finger_count;
}


static int cypress_parse_packet(struct psmouse *psmouse,
				struct cytp_data *cytp, struct cytp_report_data *report_data)
{
	unsigned char *packet = psmouse->packet;
	unsigned char header_byte = packet[0];

	memset(report_data, 0, sizeof(struct cytp_report_data));

	report_data->contact_cnt = cypress_get_finger_count(header_byte);
	report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0;

	if (report_data->contact_cnt == 1) {
		report_data->contacts[0].x =
			((packet[1] & 0x70) << 4) | packet[2];
		report_data->contacts[0].y =
			((packet[1] & 0x07) << 8) | packet[3];
		if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
			report_data->contacts[0].z = packet[4];

	} else if (report_data->contact_cnt >= 2) {
		report_data->contacts[0].x =
			((packet[1] & 0x70) << 4) | packet[2];
		report_data->contacts[0].y =
			((packet[1] & 0x07) << 8) | packet[3];
		if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
			report_data->contacts[0].z = packet[4];

		report_data->contacts[1].x =
			((packet[5] & 0xf0) << 4) | packet[6];
		report_data->contacts[1].y =
			((packet[5] & 0x0f) << 8) | packet[7];
		if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
			report_data->contacts[1].z = report_data->contacts[0].z;
	}

	report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0;
	report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0;

	/*
	 * This is only true if one of the mouse buttons were tapped.  Make
	 * sure it doesn't turn into a click. The regular tap-to-click
	 * functionality will handle that on its own. If we don't do this,
	 * disabling tap-to-click won't affect the mouse button zones.
	 */
	if (report_data->tap)
		report_data->left = 0;

#ifdef CYTP_DEBUG_VERBOSE
	{
		int i;
		int n = report_data->contact_cnt;
		psmouse_dbg(psmouse, "Dump parsed report data as below:\n");
		psmouse_dbg(psmouse, "contact_cnt = %d\n",
			report_data->contact_cnt);
		if (n > CYTP_MAX_MT_SLOTS)
		    n = CYTP_MAX_MT_SLOTS;
		for (i = 0; i < n; i++)
			psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i,
					report_data->contacts[i].x,
					report_data->contacts[i].y,
					report_data->contacts[i].z);
		psmouse_dbg(psmouse, "left = %d\n", report_data->left);
		psmouse_dbg(psmouse, "right = %d\n", report_data->right);
		psmouse_dbg(psmouse, "middle = %d\n", report_data->middle);
	}
#endif

	return 0;
}

static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt)
{
	int i;
	struct input_dev *input = psmouse->dev;
	struct cytp_data *cytp = psmouse->private;
	struct cytp_report_data report_data;
	struct cytp_contact *contact;
	struct input_mt_pos pos[CYTP_MAX_MT_SLOTS];
	int slots[CYTP_MAX_MT_SLOTS];
	int n;

	cypress_parse_packet(psmouse, cytp, &report_data);

	n = report_data.contact_cnt;
	if (n > CYTP_MAX_MT_SLOTS)
		n = CYTP_MAX_MT_SLOTS;

	for (i = 0; i < n; i++) {
		contact = &report_data.contacts[i];
		pos[i].x = contact->x;
		pos[i].y = contact->y;
	}

	input_mt_assign_slots(input, slots, pos, n, 0);

	for (i = 0; i < n; i++) {
		contact = &report_data.contacts[i];
		input_mt_slot(input, slots[i]);
		input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
		input_report_abs(input, ABS_MT_POSITION_X, contact->x);
		input_report_abs(input, ABS_MT_POSITION_Y, contact->y);
		input_report_abs(input, ABS_MT_PRESSURE, contact->z);
	}

	input_mt_sync_frame(input);

	input_mt_report_finger_count(input, report_data.contact_cnt);

	input_report_key(input, BTN_LEFT, report_data.left);
	input_report_key(input, BTN_RIGHT, report_data.right);
	input_report_key(input, BTN_MIDDLE, report_data.middle);

	input_sync(input);
}

static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse)
{
	int contact_cnt;
	int index = psmouse->pktcnt - 1;
	unsigned char *packet = psmouse->packet;
	struct cytp_data *cytp = psmouse->private;

	if (index < 0 || index > cytp->pkt_size)
		return PSMOUSE_BAD_DATA;

	if (index == 0 && (packet[0] & 0xfc) == 0) {
		/* call packet process for reporting finger leave. */
		cypress_process_packet(psmouse, 1);
		return PSMOUSE_FULL_PACKET;
	}

	/*
	 * Perform validation (and adjust packet size) based only on the
	 * first byte; allow all further bytes through.
	 */
	if (index != 0)
		return PSMOUSE_GOOD_DATA;

	/*
	 * If absolute/relative mode bit has not been set yet, just pass
	 * the byte through.
	 */
	if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0)
		return PSMOUSE_GOOD_DATA;

	if ((packet[0] & 0x08) == 0x08)
		return PSMOUSE_BAD_DATA;

	contact_cnt = cypress_get_finger_count(packet[0]);
	if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE)
		cypress_set_packet_size(psmouse, contact_cnt == 2 ? 7 : 4);
	else
		cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5);

	return PSMOUSE_GOOD_DATA;
}

static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse)
{
	struct cytp_data *cytp = psmouse->private;

	if (psmouse->pktcnt >= cytp->pkt_size) {
		cypress_process_packet(psmouse, 0);
		return PSMOUSE_FULL_PACKET;
	}

	return cypress_validate_byte(psmouse);
}

static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate)
{
	struct cytp_data *cytp = psmouse->private;

	if (rate >= 80) {
		psmouse->rate = 80;
		cytp->mode |= CYTP_BIT_HIGH_RATE;
	} else {
		psmouse->rate = 40;
		cytp->mode &= ~CYTP_BIT_HIGH_RATE;
	}

	ps2_command(&psmouse->ps2dev, (unsigned char *)&psmouse->rate,
		    PSMOUSE_CMD_SETRATE);
}

static void cypress_disconnect(struct psmouse *psmouse)
{
	cypress_reset(psmouse);
	kfree(psmouse->private);
	psmouse->private = NULL;
}

static int cypress_reconnect(struct psmouse *psmouse)
{
	int tries = CYTP_PS2_CMD_TRIES;
	int rc;

	do {
		cypress_reset(psmouse);
		rc = cypress_detect(psmouse, false);
	} while (rc && (--tries > 0));

	if (rc) {
		psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n");
		return -1;
	}

	if (cypress_set_absolute_mode(psmouse)) {
		psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n");
		return -1;
	}

	return 0;
}

int cypress_init(struct psmouse *psmouse)
{
	struct cytp_data *cytp;

	cytp = kzalloc(sizeof(struct cytp_data), GFP_KERNEL);
	if (!cytp)
		return -ENOMEM;

	psmouse->private = cytp;
	psmouse->pktsize = 8;

	cypress_reset(psmouse);

	if (cypress_query_hardware(psmouse)) {
		psmouse_err(psmouse, "Unable to query Trackpad hardware.\n");
		goto err_exit;
	}

	if (cypress_set_absolute_mode(psmouse)) {
		psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n");
		goto err_exit;
	}

	if (cypress_set_input_params(psmouse->dev, cytp) < 0) {
		psmouse_err(psmouse, "init: Unable to set input params.\n");
		goto err_exit;
	}

	psmouse->model = 1;
	psmouse->protocol_handler = cypress_protocol_handler;
	psmouse->set_rate = cypress_set_rate;
	psmouse->disconnect = cypress_disconnect;
	psmouse->reconnect = cypress_reconnect;
	psmouse->cleanup = cypress_reset;
	psmouse->resync_time = 0;

	return 0;

err_exit:
	/*
	 * Reset Cypress Trackpad as a standard mouse. Then
	 * let psmouse driver commmunicating with it as default PS2 mouse.
	 */
	cypress_reset(psmouse);

	psmouse->private = NULL;
	kfree(cytp);

	return -1;
}
Commit	Line	Data
0799a924 DD	1	/*
	2	* Cypress Trackpad PS/2 mouse driver
	3	*
	4	* Copyright (c) 2012 Cypress Semiconductor Corporation.
	5	*
	6	* Author:
	7	* Dudley Du <dudl@cypress.com>
	8	*
	9	* Additional contributors include:
	10	* Kamal Mostafa <kamal@canonical.com>
	11	* Kyle Fazzari <git@status.e4ward.com>
	12	*
	13	* This program is free software; you can redistribute it and/or modify it
	14	* under the terms of the GNU General Public License version 2 as published by
	15	* the Free Software Foundation.
	16	*/
	17
0799a924 DD	18	#include <linux/module.h>
	19	#include <linux/kernel.h>
	20	#include <linux/slab.h>
	21	#include <linux/serio.h>
	22	#include <linux/libps2.h>
	23	#include <linux/input.h>
	24	#include <linux/input/mt.h>
	25	#include <linux/sched.h>
	26	#include <linux/wait.h>
	27
	28	#include "cypress_ps2.h"
	29
	30	#undef CYTP_DEBUG_VERBOSE /* define this and DEBUG for more verbose dump */
	31
	32	static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n)
	33	{
	34	struct cytp_data *cytp = psmouse->private;
	35	cytp->pkt_size = n;
	36	}
	37
	38	static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200};
	39	static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03};
	40
	41	static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value)
	42	{
	43	struct ps2dev *ps2dev = &psmouse->ps2dev;
	44
	45	if (ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT) < 0) {
	46	psmouse_dbg(psmouse,
	47	"sending command 0x%02x failed, resp 0x%02x\n",
	48	value & 0xff, ps2dev->nak);
	49	if (ps2dev->nak == CYTP_PS2_RETRY)
	50	return CYTP_PS2_RETRY;
	51	else
	52	return CYTP_PS2_ERROR;
	53	}
	54
	55	#ifdef CYTP_DEBUG_VERBOSE
	56	psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n",
	57	value & 0xff);
	58	#endif
	59
	60	return 0;
	61	}
	62
	63	static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
	64	unsigned char data)
	65	{
	66	struct ps2dev *ps2dev = &psmouse->ps2dev;
	67	int tries = CYTP_PS2_CMD_TRIES;
	68	int rc;
	69
	70	ps2_begin_command(ps2dev);
	71
	72	do {
	73	/*
	74	* Send extension command byte (0xE8 or 0xF3).
	75	* If sending the command fails, send recovery command
	76	* to make the device return to the ready state.
	77	*/
	78	rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff);
	79	if (rc == CYTP_PS2_RETRY) {
	80	rc = cypress_ps2_sendbyte(psmouse, 0x00);
	81	if (rc == CYTP_PS2_RETRY)
82	rc = cypress_ps2_sendbyte(psmouse, 0x0a);
83	}
84	if (rc == CYTP_PS2_ERROR)
85	continue;
86
87	rc = cypress_ps2_sendbyte(psmouse, data);
88	if (rc == CYTP_PS2_RETRY)
89	rc = cypress_ps2_sendbyte(psmouse, data);
90	if (rc == CYTP_PS2_ERROR)
91	continue;
92	else
93	break;
94	} while (--tries > 0);
95
96	ps2_end_command(ps2dev);
97
98	return rc;
99	}
100
101	static int cypress_ps2_read_cmd_status(struct psmouse *psmouse,
102	unsigned char cmd,
103	unsigned char *param)
104	{
105	int rc;
106	struct ps2dev *ps2dev = &psmouse->ps2dev;
107	enum psmouse_state old_state;
108	int pktsize;
109
110	ps2_begin_command(&psmouse->ps2dev);
111
112	old_state = psmouse->state;
113	psmouse->state = PSMOUSE_CMD_MODE;
114	psmouse->pktcnt = 0;
115
116	pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3;
117	memset(param, 0, pktsize);
118
119	rc = cypress_ps2_sendbyte(psmouse, 0xe9);
120	if (rc < 0)
121	goto out;
122
123	wait_event_timeout(ps2dev->wait,
124	(psmouse->pktcnt >= pktsize),
125	msecs_to_jiffies(CYTP_CMD_TIMEOUT));
126
127	memcpy(param, psmouse->packet, pktsize);
128
129	psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n",
130	cmd, pktsize, param);
131
132	out:
133	psmouse->state = old_state;
134	psmouse->pktcnt = 0;
135
136	ps2_end_command(&psmouse->ps2dev);
137
138	return rc;
139	}
140
141	static bool cypress_verify_cmd_state(struct psmouse *psmouse,
142	unsigned char cmd, unsigned char *param)
143	{
144	bool rate_match = false;
145	bool resolution_match = false;
146	int i;
147
148	/* callers will do further checking. */
149	if (cmd == CYTP_CMD_READ_CYPRESS_ID \|\|
150	cmd == CYTP_CMD_STANDARD_MODE \|\|
151	cmd == CYTP_CMD_READ_TP_METRICS)
152	return true;
153
154	if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID &&
155	(param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) {
156	for (i = 0; i < sizeof(cytp_resolution); i++)
157	if (cytp_resolution[i] == param[1])
158	resolution_match = true;
159
160	for (i = 0; i < sizeof(cytp_rate); i++)
161	if (cytp_rate[i] == param[2])
162	rate_match = true;
163
164	if (resolution_match && rate_match)
165	return true;
166	}
167
168	psmouse_dbg(psmouse, "verify cmd state failed.\n");
169	return false;
170	}
171
172	static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd,
173	unsigned char *param)
174	{
175	int tries = CYTP_PS2_CMD_TRIES;
176	int rc;
177
178	psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n",
179	cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd),
180	DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd));
181
182	do {
183	cypress_ps2_ext_cmd(psmouse,
184	PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd));
185	cypress_ps2_ext_cmd(psmouse,
186	PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd));
187	cypress_ps2_ext_cmd(psmouse,
188	PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd));
189	cypress_ps2_ext_cmd(psmouse,
190	PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd));
191
192	rc = cypress_ps2_read_cmd_status(psmouse, cmd, param);
193	if (rc)
194	continue;
195
196	if (cypress_verify_cmd_state(psmouse, cmd, param))
197	return 0;
198
199	} while (--tries > 0);
200
201	return -EIO;
202	}
203
204	int cypress_detect(struct psmouse *psmouse, bool set_properties)
205	{
206	unsigned char param[3];
207
208	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
209	return -ENODEV;
210
211	/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
212	if (param[0] != 0x33 \|\| param[1] != 0xCC)
213	return -ENODEV;
214
215	if (set_properties) {
216	psmouse->vendor = "Cypress";
217	psmouse->name = "Trackpad";
218	}
219
220	return 0;
221	}
222
223	static int cypress_read_fw_version(struct psmouse *psmouse)
224	{
225	struct cytp_data *cytp = psmouse->private;
226	unsigned char param[3];
227
228	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
229	return -ENODEV;
230
231	/* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
232	if (param[0] != 0x33 \|\| param[1] != 0xCC)
233	return -ENODEV;
234
235	cytp->fw_version = param[2] & FW_VERSION_MASX;
236	cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0;
237
81bb5d31 KM	238	/*
	239	* Trackpad fw_version 11 (in Dell XPS12) yields a bogus response to
	240	* CYTP_CMD_READ_TP_METRICS so do not try to use it. LP: #1103594.
	241	*/
	242	if (cytp->fw_version >= 11)
	243	cytp->tp_metrics_supported = 0;
	244
0799a924 DD	245	psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version);
	246	psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n",
	247	cytp->tp_metrics_supported);
	248
	249	return 0;
	250	}
	251
	252	static int cypress_read_tp_metrics(struct psmouse *psmouse)
	253	{
	254	struct cytp_data *cytp = psmouse->private;
	255	unsigned char param[8];
	256
	257	/* set default values for tp metrics. */
	258	cytp->tp_width = CYTP_DEFAULT_WIDTH;
	259	cytp->tp_high = CYTP_DEFAULT_HIGH;
	260	cytp->tp_max_abs_x = CYTP_ABS_MAX_X;
	261	cytp->tp_max_abs_y = CYTP_ABS_MAX_Y;
	262	cytp->tp_min_pressure = CYTP_MIN_PRESSURE;
	263	cytp->tp_max_pressure = CYTP_MAX_PRESSURE;
	264	cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
	265	cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;
	266
81bb5d31 KM	267	if (!cytp->tp_metrics_supported)
	268	return 0;
	269
0799a924 DD	270	memset(param, 0, sizeof(param));
	271	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) {
	272	/* Update trackpad parameters. */
	273	cytp->tp_max_abs_x = (param[1] << 8) \| param[0];
	274	cytp->tp_max_abs_y = (param[3] << 8) \| param[2];
	275	cytp->tp_min_pressure = param[4];
	276	cytp->tp_max_pressure = param[5];
	277	}
	278
	279	if (!cytp->tp_max_pressure \|\|
	280	cytp->tp_max_pressure < cytp->tp_min_pressure \|\|
	281	!cytp->tp_width \|\| !cytp->tp_high \|\|
	282	!cytp->tp_max_abs_x \|\|
	283	cytp->tp_max_abs_x < cytp->tp_width \|\|
	284	!cytp->tp_max_abs_y \|\|
	285	cytp->tp_max_abs_y < cytp->tp_high)
	286	return -EINVAL;
	287
	288	cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
	289	cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;
	290
	291	#ifdef CYTP_DEBUG_VERBOSE
	292	psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n");
	293	psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width);
	294	psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high);
	295	psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x);
	296	psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y);
	297	psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure);
	298	psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure);
	299	psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x);
	300	psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y);
	301
	302	psmouse_dbg(psmouse, "tp_type_APA = %d\n",
	303	(param[6] & TP_METRICS_BIT_APA) ? 1 : 0);
	304	psmouse_dbg(psmouse, "tp_type_MTG = %d\n",
	305	(param[6] & TP_METRICS_BIT_MTG) ? 1 : 0);
	306	psmouse_dbg(psmouse, "tp_palm = %d\n",
	307	(param[6] & TP_METRICS_BIT_PALM) ? 1 : 0);
	308	psmouse_dbg(psmouse, "tp_stubborn = %d\n",
	309	(param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0);
	310	psmouse_dbg(psmouse, "tp_1f_jitter = %d\n",
	311	(param[6] & TP_METRICS_BIT_1F_JITTER) >> 2);
	312	psmouse_dbg(psmouse, "tp_2f_jitter = %d\n",
	313	(param[6] & TP_METRICS_BIT_2F_JITTER) >> 4);
	314	psmouse_dbg(psmouse, "tp_1f_spike = %d\n",
	315	param[7] & TP_METRICS_BIT_1F_SPIKE);
	316	psmouse_dbg(psmouse, "tp_2f_spike = %d\n",
	317	(param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2);
	318	psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n",
	319	(param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4);
	320	#endif
	321
	322	return 0;
	323	}
	324
	325	static int cypress_query_hardware(struct psmouse *psmouse)
	326	{
0799a924 DD	327	int ret;
	328
	329	ret = cypress_read_fw_version(psmouse);
	330	if (ret)
	331	return ret;
	332
81bb5d31 KM	333	ret = cypress_read_tp_metrics(psmouse);
	334	if (ret)
	335	return ret;
0799a924 DD	336
	337	return 0;
	338	}
	339
	340	static int cypress_set_absolute_mode(struct psmouse *psmouse)
	341	{
	342	struct cytp_data *cytp = psmouse->private;
	343	unsigned char param[3];
	344
	345	if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0)
	346	return -1;
	347
	348	cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK)
	349	\| CYTP_BIT_ABS_PRESSURE;
	350	cypress_set_packet_size(psmouse, 5);
	351
	352	return 0;
	353	}
	354
	355	/*
	356	* Reset trackpad device.
	357	* This is also the default mode when trackpad powered on.
	358	*/
	359	static void cypress_reset(struct psmouse *psmouse)
	360	{
	361	struct cytp_data *cytp = psmouse->private;
	362
	363	cytp->mode = 0;
	364
	365	psmouse_reset(psmouse);
	366	}
	367
	368	static int cypress_set_input_params(struct input_dev *input,
	369	struct cytp_data *cytp)
	370	{
	371	int ret;
	372
	373	if (!cytp->tp_res_x \|\| !cytp->tp_res_y)
	374	return -EINVAL;
	375
	376	__set_bit(EV_ABS, input->evbit);
	377	input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0);
	378	input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0);
	379	input_set_abs_params(input, ABS_PRESSURE,
	380	cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0);
	381	input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0);
	382
	383	/* finger position */
	384	input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0);
	385	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0);
	386	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0);
	387
	388	ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS,
	389	INPUT_MT_DROP_UNUSED\|INPUT_MT_TRACK);
	390	if (ret < 0)
	391	return ret;
	392
	393	__set_bit(INPUT_PROP_SEMI_MT, input->propbit);
	394
	395	input_abs_set_res(input, ABS_X, cytp->tp_res_x);
	396	input_abs_set_res(input, ABS_Y, cytp->tp_res_y);
	397
	398	input_abs_set_res(input, ABS_MT_POSITION_X, cytp->tp_res_x);
	399	input_abs_set_res(input, ABS_MT_POSITION_Y, cytp->tp_res_y);
400
401	__set_bit(BTN_TOUCH, input->keybit);
402	__set_bit(BTN_TOOL_FINGER, input->keybit);
403	__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
404	__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
405	__set_bit(BTN_TOOL_QUADTAP, input->keybit);
406	__set_bit(BTN_TOOL_QUINTTAP, input->keybit);
407
408	__clear_bit(EV_REL, input->evbit);
409	__clear_bit(REL_X, input->relbit);
410	__clear_bit(REL_Y, input->relbit);
411
0799a924 DD	412	__set_bit(EV_KEY, input->evbit);
	413	__set_bit(BTN_LEFT, input->keybit);
	414	__set_bit(BTN_RIGHT, input->keybit);
	415	__set_bit(BTN_MIDDLE, input->keybit);
	416
	417	input_set_drvdata(input, cytp);
	418
	419	return 0;
	420	}
	421
	422	static int cypress_get_finger_count(unsigned char header_byte)
	423	{
	424	unsigned char bits6_7;
	425	int finger_count;
	426
	427	bits6_7 = header_byte >> 6;
	428	finger_count = bits6_7 & 0x03;
	429
	430	if (finger_count == 1)
	431	return 1;
	432
	433	if (header_byte & ABS_HSCROLL_BIT) {
	434	/* HSCROLL gets added on to 0 finger count. */
	435	switch (finger_count) {
	436	case 0: return 4;
	437	case 2: return 5;
	438	default:
	439	/* Invalid contact (e.g. palm). Ignore it. */
5df682b2	440	return 0;
0799a924 DD	441	}
	442	}
	443
	444	return finger_count;
	445	}
	446
	447
	448	static int cypress_parse_packet(struct psmouse *psmouse,
	449	struct cytp_data cytp, struct cytp_report_data report_data)
	450	{
	451	unsigned char *packet = psmouse->packet;
	452	unsigned char header_byte = packet[0];
0799a924 DD	453
	454	memset(report_data, 0, sizeof(struct cytp_report_data));
	455
5df682b2	456	report_data->contact_cnt = cypress_get_finger_count(header_byte);
0799a924 DD	457	report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0;
	458
	459	if (report_data->contact_cnt == 1) {
	460	report_data->contacts[0].x =
	461	((packet[1] & 0x70) << 4) \| packet[2];
	462	report_data->contacts[0].y =
	463	((packet[1] & 0x07) << 8) \| packet[3];
	464	if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
	465	report_data->contacts[0].z = packet[4];
	466
	467	} else if (report_data->contact_cnt >= 2) {
	468	report_data->contacts[0].x =
	469	((packet[1] & 0x70) << 4) \| packet[2];
	470	report_data->contacts[0].y =
	471	((packet[1] & 0x07) << 8) \| packet[3];
	472	if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
	473	report_data->contacts[0].z = packet[4];
	474
	475	report_data->contacts[1].x =
	476	((packet[5] & 0xf0) << 4) \| packet[6];
	477	report_data->contacts[1].y =
	478	((packet[5] & 0x0f) << 8) \| packet[7];
	479	if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
	480	report_data->contacts[1].z = report_data->contacts[0].z;
	481	}
	482
	483	report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0;
	484	report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0;
	485
	486	/*
	487	* This is only true if one of the mouse buttons were tapped. Make
	488	* sure it doesn't turn into a click. The regular tap-to-click
	489	* functionality will handle that on its own. If we don't do this,
	490	* disabling tap-to-click won't affect the mouse button zones.
	491	*/
	492	if (report_data->tap)
	493	report_data->left = 0;
	494
	495	#ifdef CYTP_DEBUG_VERBOSE
	496	{
	497	int i;
	498	int n = report_data->contact_cnt;
	499	psmouse_dbg(psmouse, "Dump parsed report data as below:\n");
	500	psmouse_dbg(psmouse, "contact_cnt = %d\n",
	501	report_data->contact_cnt);
	502	if (n > CYTP_MAX_MT_SLOTS)
	503	n = CYTP_MAX_MT_SLOTS;
	504	for (i = 0; i < n; i++)
	505	psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i,
	506	report_data->contacts[i].x,
	507	report_data->contacts[i].y,
	508	report_data->contacts[i].z);
	509	psmouse_dbg(psmouse, "left = %d\n", report_data->left);
	510	psmouse_dbg(psmouse, "right = %d\n", report_data->right);
	511	psmouse_dbg(psmouse, "middle = %d\n", report_data->middle);
	512	}
	513	#endif
	514
	515	return 0;
	516	}
	517
	518	static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt)
	519	{
	520	int i;
521	struct input_dev *input = psmouse->dev;
522	struct cytp_data *cytp = psmouse->private;
523	struct cytp_report_data report_data;
524	struct cytp_contact *contact;
525	struct input_mt_pos pos[CYTP_MAX_MT_SLOTS];
526	int slots[CYTP_MAX_MT_SLOTS];
527	int n;
528
5df682b2	529	cypress_parse_packet(psmouse, cytp, &report_data);
0799a924 DD	530
0799a924 DD	531	n = report_data.contact_cnt;
0799a924 DD	532	if (n > CYTP_MAX_MT_SLOTS)
	533	n = CYTP_MAX_MT_SLOTS;
	534
	535	for (i = 0; i < n; i++) {
	536	contact = &report_data.contacts[i];
	537	pos[i].x = contact->x;
	538	pos[i].y = contact->y;
	539	}
	540
448c7f38	541	input_mt_assign_slots(input, slots, pos, n, 0);
0799a924 DD	542
	543	for (i = 0; i < n; i++) {
	544	contact = &report_data.contacts[i];
	545	input_mt_slot(input, slots[i]);
	546	input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
	547	input_report_abs(input, ABS_MT_POSITION_X, contact->x);
	548	input_report_abs(input, ABS_MT_POSITION_Y, contact->y);
	549	input_report_abs(input, ABS_MT_PRESSURE, contact->z);
	550	}
	551
	552	input_mt_sync_frame(input);
	553
	554	input_mt_report_finger_count(input, report_data.contact_cnt);
	555
	556	input_report_key(input, BTN_LEFT, report_data.left);
	557	input_report_key(input, BTN_RIGHT, report_data.right);
	558	input_report_key(input, BTN_MIDDLE, report_data.middle);
	559
	560	input_sync(input);
	561	}
	562
	563	static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse)
	564	{
	565	int contact_cnt;
	566	int index = psmouse->pktcnt - 1;
	567	unsigned char *packet = psmouse->packet;
	568	struct cytp_data *cytp = psmouse->private;
	569
	570	if (index < 0 \|\| index > cytp->pkt_size)
	571	return PSMOUSE_BAD_DATA;
	572
	573	if (index == 0 && (packet[0] & 0xfc) == 0) {
	574	/* call packet process for reporting finger leave. */
	575	cypress_process_packet(psmouse, 1);
	576	return PSMOUSE_FULL_PACKET;
	577	}
	578
	579	/*
	580	* Perform validation (and adjust packet size) based only on the
	581	* first byte; allow all further bytes through.
	582	*/
	583	if (index != 0)
	584	return PSMOUSE_GOOD_DATA;
	585
	586	/*
	587	* If absolute/relative mode bit has not been set yet, just pass
	588	* the byte through.
	589	*/
	590	if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0)
	591	return PSMOUSE_GOOD_DATA;
	592
	593	if ((packet[0] & 0x08) == 0x08)
	594	return PSMOUSE_BAD_DATA;
	595
	596	contact_cnt = cypress_get_finger_count(packet[0]);
0799a924 DD	597	if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE)
	598	cypress_set_packet_size(psmouse, contact_cnt == 2 ? 7 : 4);
	599	else
	600	cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5);
	601
	602	return PSMOUSE_GOOD_DATA;
	603	}
	604
	605	static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse)
	606	{
	607	struct cytp_data *cytp = psmouse->private;
	608
	609	if (psmouse->pktcnt >= cytp->pkt_size) {
	610	cypress_process_packet(psmouse, 0);
	611	return PSMOUSE_FULL_PACKET;
	612	}
	613
	614	return cypress_validate_byte(psmouse);
	615	}
	616
	617	static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate)
	618	{
	619	struct cytp_data *cytp = psmouse->private;
	620
	621	if (rate >= 80) {
	622	psmouse->rate = 80;
	623	cytp->mode \|= CYTP_BIT_HIGH_RATE;
	624	} else {
	625	psmouse->rate = 40;
	626	cytp->mode &= ~CYTP_BIT_HIGH_RATE;
	627	}
	628
	629	ps2_command(&psmouse->ps2dev, (unsigned char *)&psmouse->rate,
	630	PSMOUSE_CMD_SETRATE);
	631	}
	632
	633	static void cypress_disconnect(struct psmouse *psmouse)
	634	{
	635	cypress_reset(psmouse);
	636	kfree(psmouse->private);
	637	psmouse->private = NULL;
	638	}
	639
	640	static int cypress_reconnect(struct psmouse *psmouse)
	641	{
	642	int tries = CYTP_PS2_CMD_TRIES;
	643	int rc;
	644
	645	do {
	646	cypress_reset(psmouse);
	647	rc = cypress_detect(psmouse, false);
	648	} while (rc && (--tries > 0));
	649
	650	if (rc) {
	651	psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n");
	652	return -1;
	653	}
	654
	655	if (cypress_set_absolute_mode(psmouse)) {
	656	psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n");
	657	return -1;
	658	}
	659
	660	return 0;
661	}
662
663	int cypress_init(struct psmouse *psmouse)
664	{
665	struct cytp_data *cytp;
666
221a27c2	667	cytp = kzalloc(sizeof(struct cytp_data), GFP_KERNEL);
c2e60959	668	if (!cytp)
0799a924 DD	669	return -ENOMEM;
0799a924 DD	670
c2e60959	671	psmouse->private = cytp;
0799a924 DD	672	psmouse->pktsize = 8;
0799a924 DD	673
c2e60959 GB	674	cypress_reset(psmouse);
c2e60959 GB	675
0799a924 DD	676	if (cypress_query_hardware(psmouse)) {
	677	psmouse_err(psmouse, "Unable to query Trackpad hardware.\n");
	678	goto err_exit;
	679	}
	680
	681	if (cypress_set_absolute_mode(psmouse)) {
	682	psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n");
	683	goto err_exit;
	684	}
	685
	686	if (cypress_set_input_params(psmouse->dev, cytp) < 0) {
	687	psmouse_err(psmouse, "init: Unable to set input params.\n");
	688	goto err_exit;
	689	}
	690
	691	psmouse->model = 1;
	692	psmouse->protocol_handler = cypress_protocol_handler;
	693	psmouse->set_rate = cypress_set_rate;
	694	psmouse->disconnect = cypress_disconnect;
	695	psmouse->reconnect = cypress_reconnect;
	696	psmouse->cleanup = cypress_reset;
	697	psmouse->resync_time = 0;
	698
	699	return 0;
	700
	701	err_exit:
	702	/*
	703	* Reset Cypress Trackpad as a standard mouse. Then
	704	* let psmouse driver commmunicating with it as default PS2 mouse.
	705	*/
	706	cypress_reset(psmouse);
	707
	708	psmouse->private = NULL;
	709	kfree(cytp);
	710
	711	return -1;
	712	}