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Commit 95f75e91 authored by Yunkang Tang's avatar Yunkang Tang Committed by Dmitry Torokhov
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Input: ALPS - add support for DualPoint device on Dell XT2 model 



The device uses special MPU controller that necessitates the new
initialization sequence for the device. We also define a new protocol for
the trackpad that allows reporting better resolution than older V2
protocol.

Signed-off-by: default avatarYunkang Tang <yunkang.tang@cn.alps.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 9cb80b96

drivers/input/mouse/alps.c

+203 −3
Original line number Diff line number Diff line
@@ -70,6 +70,25 @@ static const struct alps_nibble_commands alps_v4_nibble_commands[] = { 
	{ PSMOUSE_CMD_SETSCALE11,	0x00 }, /* f */

};



static const struct alps_nibble_commands alps_v6_nibble_commands[] = {

	{ PSMOUSE_CMD_ENABLE,		0x00 }, /* 0 */

	{ PSMOUSE_CMD_SETRATE,		0x0a }, /* 1 */

	{ PSMOUSE_CMD_SETRATE,		0x14 }, /* 2 */

	{ PSMOUSE_CMD_SETRATE,		0x28 }, /* 3 */

	{ PSMOUSE_CMD_SETRATE,		0x3c }, /* 4 */

	{ PSMOUSE_CMD_SETRATE,		0x50 }, /* 5 */

	{ PSMOUSE_CMD_SETRATE,		0x64 }, /* 6 */

	{ PSMOUSE_CMD_SETRATE,		0xc8 }, /* 7 */

	{ PSMOUSE_CMD_GETID,		0x00 }, /* 8 */

	{ PSMOUSE_CMD_GETINFO,		0x00 }, /* 9 */

	{ PSMOUSE_CMD_SETRES,		0x00 }, /* a */

	{ PSMOUSE_CMD_SETRES,		0x01 }, /* b */

	{ PSMOUSE_CMD_SETRES,		0x02 }, /* c */

	{ PSMOUSE_CMD_SETRES,		0x03 }, /* d */

	{ PSMOUSE_CMD_SETSCALE21,	0x00 }, /* e */

	{ PSMOUSE_CMD_SETSCALE11,	0x00 }, /* f */

};





#define ALPS_DUALPOINT		0x02	/* touchpad has trackstick */

#define ALPS_PASS		0x04	/* device has a pass-through port */
@@ -103,6 +122,7 @@ static const struct alps_model_info alps_model_data[] = { 
	/* Dell Latitude E5500, E6400, E6500, Precision M4400 */

	{ { 0x62, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf,

		ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },

	{ { 0x73, 0x00, 0x14 }, 0x00, ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT },		/* Dell XT2 */

	{ { 0x73, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },		/* Dell Vostro 1400 */

	{ { 0x52, 0x01, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff,

		ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },				/* Toshiba Tecra A11-11L */
@@ -645,6 +665,76 @@ static void alps_process_packet_v3(struct psmouse *psmouse) 
	alps_process_touchpad_packet_v3(psmouse);

}



static void alps_process_packet_v6(struct psmouse *psmouse)

{

	struct alps_data *priv = psmouse->private;

	unsigned char *packet = psmouse->packet;

	struct input_dev *dev = psmouse->dev;

	struct input_dev *dev2 = priv->dev2;

	int x, y, z, left, right, middle;



	/*

	 * We can use Byte5 to distinguish if the packet is from Touchpad

	 * or Trackpoint.

	 * Touchpad:	0 - 0x7E

	 * Trackpoint:	0x7F

	 */

	if (packet[5] == 0x7F) {

		/* It should be a DualPoint when received Trackpoint packet */

		if (!(priv->flags & ALPS_DUALPOINT))

			return;



		/* Trackpoint packet */

		x = packet[1] | ((packet[3] & 0x20) << 2);

		y = packet[2] | ((packet[3] & 0x40) << 1);

		z = packet[4];

		left = packet[3] & 0x01;

		right = packet[3] & 0x02;

		middle = packet[3] & 0x04;



		/* To prevent the cursor jump when finger lifted */

		if (x == 0x7F && y == 0x7F && z == 0x7F)

			x = y = z = 0;



		/* Divide 4 since trackpoint's speed is too fast */

		input_report_rel(dev2, REL_X, (char)x / 4);

		input_report_rel(dev2, REL_Y, -((char)y / 4));



		input_report_key(dev2, BTN_LEFT, left);

		input_report_key(dev2, BTN_RIGHT, right);

		input_report_key(dev2, BTN_MIDDLE, middle);



		input_sync(dev2);

		return;

	}



	/* Touchpad packet */

	x = packet[1] | ((packet[3] & 0x78) << 4);

	y = packet[2] | ((packet[4] & 0x78) << 4);

	z = packet[5];

	left = packet[3] & 0x01;

	right = packet[3] & 0x02;



	if (z > 30)

		input_report_key(dev, BTN_TOUCH, 1);

	if (z < 25)

		input_report_key(dev, BTN_TOUCH, 0);



	if (z > 0) {

		input_report_abs(dev, ABS_X, x);

		input_report_abs(dev, ABS_Y, y);

	}



	input_report_abs(dev, ABS_PRESSURE, z);

	input_report_key(dev, BTN_TOOL_FINGER, z > 0);



	/* v6 touchpad does not have middle button */

	input_report_key(dev, BTN_LEFT, left);

	input_report_key(dev, BTN_RIGHT, right);



	input_sync(dev);

}



static void alps_process_packet_v4(struct psmouse *psmouse)

{

	struct alps_data *priv = psmouse->private;
@@ -897,7 +987,7 @@ static psmouse_ret_t alps_process_byte(struct psmouse *psmouse) 
	}



	/* Bytes 2 - pktsize should have 0 in the highest bit */

	if (priv->proto_version != ALPS_PROTO_V5 &&

	if ((priv->proto_version < ALPS_PROTO_V5) &&

	    psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&

	    (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {

		psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
@@ -1085,6 +1175,80 @@ static int alps_absolute_mode_v1_v2(struct psmouse *psmouse) 
	return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);

}



static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)

{

	int i, nibble;



	/*

	 * b0-b11 are valid bits, send sequence is inverse.

	 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1

	 */

	for (i = 0; i <= 8; i += 4) {

		nibble = (word >> i) & 0xf;

		if (alps_command_mode_send_nibble(psmouse, nibble))

			return -1;

	}



	return 0;

}



static int alps_monitor_mode_write_reg(struct psmouse *psmouse,

				       u16 addr, u16 value)

{

	struct ps2dev *ps2dev = &psmouse->ps2dev;



	/* 0x0A0 is the command to write the word */

	if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||

	    alps_monitor_mode_send_word(psmouse, 0x0A0) ||

	    alps_monitor_mode_send_word(psmouse, addr) ||

	    alps_monitor_mode_send_word(psmouse, value) ||

	    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))

		return -1;



	return 0;

}



static int alps_monitor_mode(struct psmouse *psmouse, bool enable)

{

	struct ps2dev *ps2dev = &psmouse->ps2dev;



	if (enable) {

		/* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */

		if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||

		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||

		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||

		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||

		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||

		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||

		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||

		    ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))

			return -1;

	} else {

		/* EC to exit monitor mode */

		if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))

			return -1;

	}



	return 0;

}



static int alps_absolute_mode_v6(struct psmouse *psmouse)

{

	u16 reg_val = 0x181;

	int ret = -1;



	/* enter monitor mode, to write the register */

	if (alps_monitor_mode(psmouse, true))

		return -1;



	ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);



	if (alps_monitor_mode(psmouse, false))

		ret = -1;



	return ret;

}



static int alps_get_status(struct psmouse *psmouse, char *param)

{

	/* Get status: 0xF5 0xF5 0xF5 0xE9 */
@@ -1189,6 +1353,32 @@ static int alps_hw_init_v1_v2(struct psmouse *psmouse) 
	return 0;

}



static int alps_hw_init_v6(struct psmouse *psmouse)

{

	unsigned char param[2] = {0xC8, 0x14};



	/* Enter passthrough mode to let trackpoint enter 6byte raw mode */

	if (alps_passthrough_mode_v2(psmouse, true))

		return -1;



	if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||

	    ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||

	    ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||

	    ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||

	    ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))

		return -1;



	if (alps_passthrough_mode_v2(psmouse, false))

		return -1;



	if (alps_absolute_mode_v6(psmouse)) {

		psmouse_err(psmouse, "Failed to enable absolute mode\n");

		return -1;

	}



	return 0;

}



/*

 * Enable or disable passthrough mode to the trackstick.

 */
@@ -1553,6 +1743,8 @@ static void alps_set_defaults(struct alps_data *priv) 
		priv->hw_init = alps_hw_init_v1_v2;

		priv->process_packet = alps_process_packet_v1_v2;

		priv->set_abs_params = alps_set_abs_params_st;

		priv->x_max = 1023;

		priv->y_max = 767;

		break;

	case ALPS_PROTO_V3:

		priv->hw_init = alps_hw_init_v3;
@@ -1584,6 +1776,14 @@ static void alps_set_defaults(struct alps_data *priv) 
		priv->x_bits = 23;

		priv->y_bits = 12;

		break;

	case ALPS_PROTO_V6:

		priv->hw_init = alps_hw_init_v6;

		priv->process_packet = alps_process_packet_v6;

		priv->set_abs_params = alps_set_abs_params_st;

		priv->nibble_commands = alps_v6_nibble_commands;

		priv->x_max = 2047;

		priv->y_max = 1535;

		break;

	}

}
@@ -1705,8 +1905,8 @@ static void alps_disconnect(struct psmouse *psmouse) 
static void alps_set_abs_params_st(struct alps_data *priv,

				   struct input_dev *dev1)

{

	input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);

	input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);

	input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);

	input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);

}



static void alps_set_abs_params_mt(struct alps_data *priv,

drivers/input/mouse/alps.h

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#define ALPS_PROTO_V3	3

#define ALPS_PROTO_V4	4

#define ALPS_PROTO_V5	5

#define ALPS_PROTO_V6	6



/**

 * struct alps_model_info - touchpad ID table