ALPS touchpad driver

Hi Peter, Neil,

I found on the net a possible way to detect ALPS driver so I made some changes
to your driver. Unfortunately I do not have ALPS touchpad so if anyone could
give it a spin I's appreciate it.

The patch is to be applied on top of my patches at:

http://www.geocities.com/dt_or/input/2_6_6-rc2/

-- 
Dmitry


===================================================================


ChangeSet@1.1907, 2004-04-23 02:22:22-05:00, dtor_core@ameritech.net
  ALPS driver


 Makefile       |    2 
 alps.c         |  185 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 alps.h         |   17 +++++
 psmouse-base.c |   19 +++++
 psmouse.h      |    3 
 5 files changed, 224 insertions(+), 2 deletions(-)


===================================================================



diff -Nru a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile
--- a/drivers/input/mouse/Makefile	Fri Apr 23 02:24:19 2004
+++ b/drivers/input/mouse/Makefile	Fri Apr 23 02:24:19 2004
@@ -15,4 +15,4 @@
 obj-$(CONFIG_MOUSE_SERIAL)	+= sermouse.o
 obj-$(CONFIG_MOUSE_VSXXXAA)	+= vsxxxaa.o
 
-psmouse-objs  := psmouse-base.o logips2pp.o synaptics.o
+psmouse-objs  := psmouse-base.o alps.o logips2pp.o synaptics.o
diff -Nru a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/drivers/input/mouse/alps.c	Fri Apr 23 02:24:19 2004
@@ -0,0 +1,185 @@
+/*
+ * ALPS touchpad PS/2 mouse driver
+ *
+ * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (c) 2003 Peter Osterlund <petero2@telia.com>
+ * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
+ *
+ * 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/input.h>
+#include <linux/serio.h>
+
+#include "psmouse.h"
+#include "alps.h"
+
+/*
+ * ALPS abolute Mode
+ * byte 0: 1 1 1 1 1 mid0 rig0 lef0
+ * byte 1: 0 x6 x5 x4 x3 x2 x1 x0
+ * byte 2: 0 x10 x9 x8 x7 up1 fin ges
+ * byte 3: 0 y9 y8 y7 1 mid1 rig1 lef1
+ * byte 4: 0 y6 y5 y4 y3 y2 y1 y0
+ * byte 5: 0 z6 z5 z4 z3 z2 z1 z0
+ *
+ * On a dualpoint, {mid,rig,lef}0 are the stick, 1 are the pad.
+ * We just 'or' them together for now.
+ *
+ * We used to send 'ges'tures as BTN_TOUCH but this made it impossible
+ * to disable tap events in the synaptics driver since the driver
+ * was unable to distinguish a gesture tap from an actual button click.
+ * A tap gesture now creates an emulated touch that the synaptics
+ * driver can interpret as a tap event, if MaxTapTime=0 and
+ * MaxTapMove=0 then the driver will ignore taps.
+ *
+ * The touchpad on an 'Acer Aspire' has 4 buttons:
+ *   left,right,up,down.
+ * This device always sets {mid,rig,lef}0 to 1 and
+ * reflects left,right,down,up in lef1,rig1,mid1,up1.
+ */
+
+static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs)
+{
+	unsigned char *packet = psmouse->packet;
+	struct input_dev *dev = &psmouse->dev;
+	int x, y, z;
+	int left = 0, right = 0, middle = 0;
+
+	input_regs(dev, regs);
+
+	x = (packet[1] & 0x7f) | ((packet[2] & 0x78)<<(7-3));
+	y = (packet[4] & 0x7f) | ((packet[3] & 0x70)<<(7-4));
+	z = packet[5];
+
+	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);
+
+	left  |= (packet[2]     ) & 1;
+	left  |= (packet[3]     ) & 1;
+	right |= (packet[3] >> 1) & 1;
+	if (packet[0] == 0xff) {
+		int back    = (packet[3] >> 2) & 1;
+		int forward = (packet[2] >> 2) & 1;
+		if (back && forward) {
+			middle = 1;
+			back = 0;
+			forward = 0;
+		}
+		input_report_key(dev, BTN_BACK,    back);
+		input_report_key(dev, BTN_FORWARD, forward);
+	} else {
+		left   |= (packet[0]     ) & 1;
+		right  |= (packet[0] >> 1) & 1;
+		middle |= (packet[0] >> 2) & 1;
+		middle |= (packet[3] >> 2) & 1;
+	}
+
+	input_report_key(dev, BTN_LEFT, left);
+	input_report_key(dev, BTN_RIGHT, right);
+	input_report_key(dev, BTN_MIDDLE, middle);
+
+	input_sync(dev);
+}
+
+static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
+{
+	/* ALPS absolute mode packets start with 0b11111mrl */
+	if ((psmouse->packet[0] & 0xf8) != 0xf8)
+		return PSMOUSE_BAD_DATA;
+
+	/* Bytes 2 - 6 should have 0 in the highest bit */
+	if (psmouse->pktcnt > 1 && psmouse->pktcnt <= 6 &&
+	    (psmouse->packet[psmouse->pktcnt] & 0x80))
+		return PSMOUSE_BAD_DATA;
+
+	if (psmouse->pktcnt == 6) {
+		alps_process_packet(psmouse, regs);
+		return PSMOUSE_FULL_PACKET;
+	}
+
+	return PSMOUSE_GOOD_DATA;
+}
+
+int alps_detect(struct psmouse *psmouse)
+{
+	unsigned char param[4];
+
+	/* First try "E6 report". ALPS should return 0x00 0x00 0x0a */
+	param[0] = 0;
+	if (psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES) ||
+	    psmouse_command(psmouse,  NULL, PSMOUSE_CMD_SETSCALE11) ||
+	    psmouse_command(psmouse,  NULL, PSMOUSE_CMD_SETSCALE11) ||
+	    psmouse_command(psmouse,  NULL, PSMOUSE_CMD_SETSCALE11))
+		return 0;
+
+	param[0] = param[1] = param[2] = 0xff;
+	if (psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO))
+		return 0;
+
+	printk(KERN_INFO "alps.c: E6 report: %2.2x %2.2x %2.2x\n",
+		param[0], param[1], param[2]);
+
+	if (param[0] != 0x00 || param[1] != 0x00 || param[2] != 0x0a)
+		return 0;
+
+	/* Now try "E7 report". ALPS should return 0x33 in byte 1 */
+	param[0] = 0;
+	if (psmouse_command(psmouse, param, PSMOUSE_CMD_SETRES) ||
+	    psmouse_command(psmouse,  NULL, PSMOUSE_CMD_SETSCALE21) ||
+	    psmouse_command(psmouse,  NULL, PSMOUSE_CMD_SETSCALE21) ||
+	    psmouse_command(psmouse,  NULL, PSMOUSE_CMD_SETSCALE21))
+		return 0;
+
+	param[0] = param[1] = param[2] = 0xff;
+	if (psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO))
+		return 0;
+
+	printk(KERN_INFO "alps.c: E7 report: %2.2x %2.2x %2.2x\n",
+		param[0], param[1], param[2]);
+
+	return param[0] != 0x33;
+}
+
+static void alps_disconnect(struct psmouse *psmouse)
+{
+	psmouse_reset(psmouse);
+}
+
+int alps_init(struct psmouse *psmouse)
+{
+	/* Try ALPS magic knock */
+	if (psmouse_command(psmouse, NULL, PSMOUSE_CMD_DISABLE) ||
+	    psmouse_command(psmouse, NULL, PSMOUSE_CMD_DISABLE) ||
+	    psmouse_command(psmouse, NULL, PSMOUSE_CMD_DISABLE) ||
+	    psmouse_command(psmouse, NULL, PSMOUSE_CMD_DISABLE))
+		return -1;
+
+	psmouse->dev.evbit[LONG(EV_REL)] &= ~BIT(EV_REL);
+	psmouse->dev.relbit[LONG(REL_X)] &= ~BIT(REL_X);
+	psmouse->dev.relbit[LONG(REL_X)] &= ~BIT(REL_X);
+
+	psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
+	input_set_abs_params(&psmouse->dev, ABS_X, 0, 0, 0, 0);
+	input_set_abs_params(&psmouse->dev, ABS_Y, 0, 0, 0, 0);
+	input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);
+
+	psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
+	psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
+	psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
+	psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
+
+	psmouse->protocol_handler = alps_process_byte;
+	psmouse->disconnect = alps_disconnect;
+
+	return 0;
+}
diff -Nru a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/drivers/input/mouse/alps.h	Fri Apr 23 02:24:19 2004
@@ -0,0 +1,17 @@
+/*
+ * ALPS touchpad PS/2 mouse driver
+ *
+ * Copyright (c) 2003 Peter Osterlund <petero2@telia.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.
+ */
+
+#ifndef _ALPS_H
+#define _ALPS_H
+
+int alps_detect(struct psmouse *psmouse);
+int alps_init(struct psmouse *psmouse);
+
+#endif
diff -Nru a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
--- a/drivers/input/mouse/psmouse-base.c	Fri Apr 23 02:24:19 2004
+++ b/drivers/input/mouse/psmouse-base.c	Fri Apr 23 02:24:19 2004
@@ -2,6 +2,7 @@
  * PS/2 mouse driver
  *
  * Copyright (c) 1999-2002 Vojtech Pavlik
+ * Copyright (c) 2003-2004 Dmitry Torokhov
  */
 
 /*
@@ -21,6 +22,7 @@
 #include "psmouse.h"
 #include "synaptics.h"
 #include "logips2pp.h"
+#include "alps.h"
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
 MODULE_DESCRIPTION("PS/2 mouse driver");
@@ -53,7 +55,7 @@
 __obsolete_setup("psmouse_resetafter=");
 __obsolete_setup("psmouse_rate=");
 
-static char *psmouse_protocols[] = { "None", "PS/2", "PS2++", "PS2T++", "GenPS/2", "ImPS/2", "ImExPS/2", "SynPS/2"};
+static char *psmouse_protocols[] = { "None", "PS/2", "PS2++", "PS2T++", "GenPS/2", "ImPS/2", "ImExPS/2", "SynPS/2", "AlpsPS/2" };
 
 /*
  * psmouse_process_byte() analyzes the PS/2 data stream and reports
@@ -440,6 +442,21 @@
  * Make sure that touchpad is in relative mode, gestures (taps) are enabled
  */
 		synaptics_reset(psmouse);
+	}
+
+/*
+ * Try ALPS TouchPad
+ */
+	if (max_proto > PSMOUSE_PS2 && alps_detect(psmouse)) {
+
+		if (set_properties) {
+			psmouse->vendor = "ALPS";
+			psmouse->name = "TouchPad";
+		}
+
+		if (max_proto > PSMOUSE_IMEX)
+			if (alps_detect(psmouse) == 0)
+				return PSMOUSE_ALPS;
 	}
 
 	if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse)) {
diff -Nru a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
--- a/drivers/input/mouse/psmouse.h	Fri Apr 23 02:24:19 2004
+++ b/drivers/input/mouse/psmouse.h	Fri Apr 23 02:24:19 2004
@@ -2,6 +2,7 @@
 #define _PSMOUSE_H
 
 #define PSMOUSE_CMD_SETSCALE11	0x00e6
+#define PSMOUSE_CMD_SETSCALE21	0x00e7
 #define PSMOUSE_CMD_SETRES	0x10e8
 #define PSMOUSE_CMD_GETINFO	0x03e9
 #define PSMOUSE_CMD_SETSTREAM	0x00ea
@@ -9,6 +10,7 @@
 #define PSMOUSE_CMD_GETID	0x02f2
 #define PSMOUSE_CMD_SETRATE	0x10f3
 #define PSMOUSE_CMD_ENABLE	0x00f4
+#define PSMOUSE_CMD_DISABLE	0x00f5
 #define PSMOUSE_CMD_RESET_DIS	0x00f6
 #define PSMOUSE_CMD_RESET_BAT	0x02ff
 
@@ -72,6 +74,7 @@
 #define PSMOUSE_IMPS		5
 #define PSMOUSE_IMEX		6
 #define PSMOUSE_SYNAPTICS 	7
+#define PSMOUSE_ALPS		8
 
 int psmouse_command(struct psmouse *psmouse, unsigned char *param, int command);
 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/