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Date: Wed, 24 Oct 2007 05:54:10 +0200
From: Arjan Opmeer <arjan@...eer.net>
To: Arjan Opmeer <arjan@...eer.net>
Cc: linux-kernel@...r.kernel.org, linux-input@...ey.karlin.mff.cuni.cz
Subject: [PATCH] Elantech touchpad driver update for kernel 2.6.23-mm1
>From Arjan Opmeer <arjan@...eer.net>
Update to the Elantech touchpad driver. Changes include:
- Absolute mode reporting is now working on my laptop.
- Fixed the use of a wrong constant in the Synaptics Identify query
- Added Synaptics Modes query as newer versions of the Windows Elantech
driver seem to try that query too.
- Make an educated guess bases on the Synaptics Capabilities query whether
middle mouse button reporting works and how finger taps are reported.
- Added a debug option.
Signed-off-by: Arjan Opmeer <arjan@...eer.net>
---
diff -purN -X linux-2.6.23-mm1.vanilla/Documentation/dontdiff linux-2.6.23-mm1.vanilla/Documentation/input/elantech.txt linux-2.6.23-mm1.elantech/Documentation/input/elantech.txt
--- linux-2.6.23-mm1.vanilla/Documentation/input/elantech.txt 2007-10-22 05:24:20.000000000 +0200
+++ linux-2.6.23-mm1.elantech/Documentation/input/elantech.txt 2007-10-22 05:24:55.000000000 +0200
@@ -1,68 +1,75 @@
Elantech Touchpad Driver
========================
- Copyright (C) 2007 Arjan Opmeer <arjan@...eer.net>
+ Copyright (C) 2007 Arjan Opmeer <arjan@...eer.net>
+ Extra information found and provided by Steve Havelka
-Configuration of the touchpad is performed by writing register values to the
-corresponding sysfs entries found under /sys/bus/serio/drivers/psmouse/serioX
+Configuration of the touchpad is performed by writing values to registers
+found under sysfs entries /sys/bus/serio/drivers/psmouse/serio?/reg_*.
+
+E.g. to disable tapping while leaving the other settings to the default
+Windows driver value one would:
+
+ echo -n 0x32 > reg_10
Registers
----------
+~~~~~~~~~
-* reg_10 (Windows driver default value 0x12)
+* reg_10 (Windows driver default value 0x12)
bit 7 6 5 4 3 2 1 0
- 0 C T D L R S E
+ B C T D L A S E
E: 1 = enable smart edges in other cases
S: 1 = enable smart edges only when dragging
- R: 1 = raw mode (needs 4 byte packets, see reg_11)
+ A: 1 = absolute mode (needs 4 byte packets, see reg_11)
L: 1 = enable drag lock (see reg_22)
D: 1 = disable dynamic resolution
T: 1 = disable tapping
C: 1 = enable corner tap
+ B: 1 = swap left and right button
-* reg_11 (Windows driver default value 0x8f)
+* reg_11 (Windows driver default value 0x8f)
bit 7 6 5 4 3 2 1 0
- 1 0 0 H V 1 P N
+ 1 0 0 H V 1 F P
- N: 1 = bit 4 or 5 of byte 0 is 1 (non null top nibble ?)
- P: 1 = enable native 4 byte packet mode (forced on by driver)
+ P: 1 = enable parity checking for relative mode
+ F: 1 = enable native 4 byte packet mode
V: 1 = enable vertical scroll area
H: 1 = enable horizonal scroll area
-* reg_20 (Windows driver default value 0x0a)
+* reg_20 (Windows driver default value 0x0a)
single finger width?
-* reg_21 (Windows driver default value 0x60)
+* reg_21 (Windows driver default value 0x60)
scroll area width (small: 0x40 ... wide: 0xff)
-* reg_22 (Windows driver default value 0xff)
+* reg_22 (Windows driver default value 0xff)
drag lock time out (short: 0x14 ... long: 0xfe; 0xff =never)
-* reg_23 (Windows driver default value 0x10)
+* reg_23 (Windows driver default value 0x10)
tap make timeout?
Note: the Windows driver does not write this register
-* reg_24 (Windows driver default value 0x10)
+* reg_24 (Windows driver default value 0x10)
tap release timeout?
Note: the Windows driver does not write this register
-* reg_25 (Windows driver default value 0x03)
+* reg_25 (Windows driver default value 0x03)
smart edge cursor speed (0x02 = slow, 0x03 = medium, 0x04 = fast)
-* reg_26 (Windows driver default value 0x00 ?? )
+* reg_26 (Windows driver default value 0x00 ?? )
smart edge activation area width?
@@ -77,18 +84,22 @@ Registers
Initially the Elantouch Touchpad is in emulation mode and reports 3 byte
standard PS/2 packets and hence works with a standard mouse driver.
-However, it can be configured to talk its native 4 byte mode and a raw 4
+However, it can be configured to talk its native 4 byte relative mode and 4
byte absolute mode both for which a dedicated driver is needed.
Native 4 byte relative mode packet format
------------------------------------------
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
byte 0:
bit 7 6 5 4 3 2 1 0
- c c ? ? 1 M R L
+ c c p2 p1 1 M R L
L, R, M = 1 when Left, Right, Middle mouse button pressed
+ some models have M as byte 3 odd parity
+ when parity checking is enabled (P = 1):
+ p1 = byte 1 odd parity
+ p2 = byte 2 odd parity
c = 1 when corner tap detected
byte 1:
@@ -106,30 +117,39 @@ byte 2:
byte 3:
bit 7 6 5 4 3 2 1 0
- w h 0 0 d3 d2 d1 d0
+ w h n1 n0 d3 d2 d1 d0
- normally:
- d3..d0 = scroll wheel amount and direction
- positive = down or left
- negative = up or right
- when corner tap detected:
- d0 = 1 when top right corner tapped
- d1 = 1 when bottom right corner tapped
- d2 = 1 when bottom left corner tapped
- d3 = 1 when top left corner tapped
- w = 1 when wide finger touch?
- h = 1 when horizontal scroll action
+ when parity checking is enabled (P = 1):
+ normally:
+ d3..d0 = scroll wheel amount and direction
+ positive = down or left
+ negative = up or right
+ when corner tap detected:
+ d0 = 1 when top right corner tapped
+ d1 = 1 when bottom right corner tapped
+ d2 = 1 when bottom left corner tapped
+ d3 = 1 when top left corner tapped
+ n1..n0 = number of fingers on touchpad
+ not all models report this but map one, two and three
+ finger taps directly to L, M and R mouse buttons
+ w = 1 when wide finger touch?
+ h = 1 when horizontal scroll action
+ otherwise (P = 0):
+ all of byte 3 is vertical scroll amount and direction
+ negative = up
+ positive = down
-Native 4 byte raw absolute mode packet format
----------------------------------------------
+Native 4 byte absolute mode packet format
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
byte 0:
bit 7 6 5 4 3 2 1 0
- 0 0 z2 z1 1 z0 R L
+ D U p1 p2 1 p3 R L
L, R = 1 when Left, Right mouse button pressed
- z2..z0 = some touch weigth?
+ p1..p3 = parity bit of bytes 1..3
+ D, U = 1 when rocker switch pressed Up, Down
byte 1:
bit 7 6 5 4 3 2 1 0
diff -purN -X linux-2.6.23-mm1.vanilla/Documentation/dontdiff linux-2.6.23-mm1.vanilla/drivers/input/mouse/elantech.c linux-2.6.23-mm1.elantech/drivers/input/mouse/elantech.c
--- linux-2.6.23-mm1.vanilla/drivers/input/mouse/elantech.c 2007-10-22 05:17:57.000000000 +0200
+++ linux-2.6.23-mm1.elantech/drivers/input/mouse/elantech.c 2007-10-22 05:48:47.000000000 +0200
@@ -18,14 +18,12 @@
#include "synaptics.h"
#include "elantech.h"
-#define ETP_RAW_MODE 0x04
-#define ETP_4_BYTE_MODE 0x02
-
-/* These values work with the touchpad on my laptop. Do they need adjustment? */
-#define ETP_XMIN 32
-#define ETP_XMAX 0x240
-#define ETP_YMIN 32
-#define ETP_YMAX 0x160
+/*
+ * Native absolute mode reporting has odd parity check on the last 3 bytes.
+ * Native relative mode can have odd parity checking on second and third byte,
+ * or last 3 bytes depending on model.
+ */
+static unsigned char parity[256];
/*
* Send a synaptics style special commands
@@ -49,7 +47,7 @@ static int elantech_write_reg(struct psm
if ((reg > 0x11) && (reg < 0x20))
return -1;
- if (psmouse_sliced_command(psmouse, ELANTECH_COMMAND) ||
+ if (psmouse_sliced_command(psmouse, ELANTECH_COMMAND_START) ||
psmouse_sliced_command(psmouse, reg) ||
psmouse_sliced_command(psmouse, val) ||
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
@@ -59,67 +57,153 @@ static int elantech_write_reg(struct psm
return 0;
}
+static void elantech_packet_dump(unsigned char *packet, int size)
+{
+ int i;
+
+ printk(KERN_DEBUG "elantech.c: PS/2 packet [");
+ for (i = 0; i < size; i++)
+ printk("%s0x%02x ", (i) ? ", " : " ", packet[i]);
+ printk("]\n");
+}
+
/*
- * Process byte stream from mouse and interpret complete data packages
+ * Report absolute mode input events
*/
-static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
+static void elantech_report_absolute(struct psmouse *psmouse)
{
struct elantech_data *etd = psmouse->private;
struct input_dev *dev = psmouse->dev;
unsigned char *packet = psmouse->packet;
- unsigned int z;
+ int fingers;
- if (psmouse->pktcnt < 4)
- return PSMOUSE_GOOD_DATA;
+ /* byte 0: D U p1 p2 1 p3 R L
+ * byte 1: f 0 th tw x9 x8 y9 y8
+ * byte 2: x7 x6 x5 x4 x3 x2 x1 x0
+ * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 */
+ fingers = ((packet[1] & 0x80) >> 7) + ((packet[1] & 0x30) >> 4);
+ input_report_key(dev, BTN_TOUCH, fingers != 0);
+ if (fingers == 1) {
+ input_report_abs(dev, ABS_X,
+ ((packet[1] & 0x0c) << 6) | packet[2]);
+ input_report_abs(dev, ABS_Y, ETP_YMAX -
+ (((packet[1] & 0x03) << 8) | packet[3]));
+ }
+ input_report_abs(dev, ABS_PRESSURE, (fingers) ? ETP_DEF_PRESSURE : 0);
+ input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
+ input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
+ input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
+ input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
+ input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+ if (etd->capabilities & ETP_CAP_HAS_ROCKER) {
+ input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); /* rocker up */
+ input_report_key(dev, BTN_BACK, packet[0] & 0x80); /* rocker down */
+ }
+}
- if (etd->reg_10 & ETP_RAW_MODE) {
- /*
- * What to do with this value? It varies too wildly to work
- * as a useful z distance
- */
- z = ((packet[0] & 0x30) >> 3) | ((packet[0] & 0x04) >> 2);
- input_report_key(dev, BTN_TOUCH, packet[1] & 0x80);
- if ((packet[1] & 0x30) == 0) {
- input_report_abs(dev, ABS_X,
- ((packet[1] & 0x0c) << 6) | packet[2]);
- input_report_abs(dev, ABS_Y,
- ETP_YMIN + ETP_YMAX -
- (((packet[1] & 0x03) << 8) | packet[3]));
- }
- input_report_key(dev, BTN_TOOL_FINGER, packet[1] & 0x80);
- input_report_key(dev, BTN_TOOL_DOUBLETAP, packet[1] & 0x10);
- input_report_key(dev, BTN_TOOL_TRIPLETAP, packet[1] & 0x20);
- input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
- input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
- } else {
- input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
+/*
+ * Report relative mode input events
+ */
+static void elantech_report_relative(struct psmouse *psmouse)
+{
+ struct elantech_data *etd = psmouse->private;
+ struct input_dev *dev = psmouse->dev;
+ unsigned char *packet = psmouse->packet;
+ int fingers, cornertap;
+
+ /* byte 0: c c p2 p1 1 M R L
+ * byte 1: dx7 dx6 dx5 dx4 dx3 dx2 dx1 dx0
+ * byte 2: dy7 dy6 dy5 dy4 dy3 dy2 dy1 dy0
+ * byte 3: w h n1 n0 d3 d2 d1 d0 */
+ input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
+ input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+
+ if (etd->capabilities & ETP_CAP_REPORTS_MIDDLE_BUTTON)
input_report_key(dev, BTN_MIDDLE, packet[0] & 0x04);
- input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
- if ((packet[0] & 0xc0) && (packet[1] & 0xf0)) {
- input_report_key(dev, BTN_0, packet[3] & 0x01); /* top right */
- input_report_key(dev, BTN_1, packet[3] & 0x02); /* bottom right */
- input_report_key(dev, BTN_2, packet[3] & 0x04); /* bottom left */
- input_report_key(dev, BTN_3, packet[3] & 0x08); /* top left */
- } else if (packet[3] & 0x0f) {
- if (packet[3] & 0x40)
+ if (etd->capabilities & ETP_CAP_ALTERNATE_TAP_BITS) {
+ fingers = (packet[3] & 0x30) >> 4;
+ input_report_key(dev, BTN_LEFT, fingers == 1);
+ input_report_key(dev, BTN_MIDDLE, fingers == 2);
+ input_report_key(dev, BTN_RIGHT, fingers == 3);
+ }
+
+ cornertap = (((packet[0] & 0xc0) == 0xc0) && ((packet[1] & 0xf0) == 0xf0));
+ if (!cornertap) {
+ input_report_rel(dev, REL_X, (int) (packet[1] & 0x7f) -
+ (int) (packet[1] & 0x80));
+ input_report_rel(dev, REL_Y, (int) (packet[2] & 0x80) -
+ (int) (packet[2] & 0x7f));
+ }
+
+ /* No more information in 3 bytes */
+ if (!(etd->reg_11 & ETP_R11_4_BYTE_MODE))
+ return;
+
+ if (cornertap) {
+ input_report_key(dev, BTN_0, packet[3] & 0x01); /* top right */
+ input_report_key(dev, BTN_1, packet[3] & 0x02); /* bottom right */
+ input_report_key(dev, BTN_2, packet[3] & 0x04); /* bottom left */
+ input_report_key(dev, BTN_3, packet[3] & 0x08); /* top left */
+ }
+
+ if (etd->reg_11 & ETP_R11_PARITY_CHECKING) {
+ if (packet[3] & 0x0f) {
+ if (packet[3] & 0x40) {
input_report_rel(dev, REL_HWHEEL,
(int) (packet[3] & 0x08) -
(int) (packet[3] & 0x07));
- else
+ } else {
input_report_rel(dev, REL_WHEEL,
(int) (packet[3] & 0x08) -
(int) (packet[3] & 0x07));
+ }
}
+ } else {
+ if (packet[3])
+ input_report_rel(dev, REL_WHEEL,
+ (int) (packet[3] & 0x80) -
+ (int) (packet[3] & 0x7f));
+ }
+}
- if (packet[1])
- input_report_rel(dev, REL_X,
- (int) (packet[1] & 0x7f) -
- (int) (packet[1] & 0x80));
- if (packet[2])
- input_report_rel(dev, REL_Y,
- (int) (packet[2] & 0x80) -
- (int) (packet[2] & 0x7f));
+/*
+ * Process byte stream from mouse and interpret complete data packets
+ */
+static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
+{
+ struct elantech_data *etd = psmouse->private;
+ struct input_dev *dev = psmouse->dev;
+ unsigned char *packet = psmouse->packet;
+
+ if (psmouse->pktcnt < psmouse->pktsize)
+ return PSMOUSE_GOOD_DATA;
+
+ if (etd->debug)
+ elantech_packet_dump(packet, psmouse->pktsize);
+
+ if (etd->reg_10 & ETP_R10_ABSOLUTE_MODE) {
+ /* byte 0: D U p1 p2 1 p3 R L */
+ if ((parity[packet[1]] != ((packet[0] & 0x20) >> 5)) ||
+ (parity[packet[2]] != ((packet[0] & 0x10) >> 4)) ||
+ (parity[packet[3]] != ((packet[0] & 0x04) >> 2)))
+ return PSMOUSE_BAD_DATA;
+ } else if (etd->reg_11 & ETP_R11_PARITY_CHECKING) {
+ /* byte 0: c c p2 p1 1 M R L */
+ if ((parity[packet[1]] != ((packet[0] & 0x10) >> 4)) ||
+ (parity[packet[2]] != ((packet[0] & 0x20) >> 5)))
+ return PSMOUSE_BAD_DATA;
+ /* Parity bit has not been sacrificed as middle mouse button bit */
+ if (!(etd->capabilities & ETP_CAP_REPORTS_MIDDLE_BUTTON)) {
+ if (parity[packet[3]] != ((packet[0] & 0x04) >> 2))
+ return PSMOUSE_BAD_DATA;
+ }
+ }
+
+ if (etd->reg_10 & ETP_R10_ABSOLUTE_MODE) {
+ elantech_report_absolute(psmouse);
+ } else {
+ elantech_report_relative(psmouse);
}
input_sync(dev);
@@ -183,6 +267,12 @@ static void elantech_set_defaults(struct
set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
+ /* Rocker button */
+ if (etd->capabilities & ETP_CAP_HAS_ROCKER) {
+ set_bit(BTN_FORWARD, dev->keybit);
+ set_bit(BTN_BACK, dev->keybit);
+ }
+
/* Corner taps */
set_bit(BTN_0, dev->keybit);
set_bit(BTN_1, dev->keybit);
@@ -198,6 +288,7 @@ static void elantech_set_defaults(struct
set_bit(EV_ABS, dev->evbit);
input_set_abs_params(dev, ABS_X, ETP_XMIN, ETP_XMAX, 0, 0);
input_set_abs_params(dev, ABS_Y, ETP_YMIN, ETP_YMAX, 0, 0);
+ input_set_abs_params(dev, ABS_PRESSURE, 0, ETP_MAX_PRESSURE, 0, 0);
}
struct elantech_attr_data {
@@ -235,9 +326,26 @@ static ssize_t elantech_set_int_attr(str
if (*rest || value > 255)
return -EINVAL;
- /* Force 4 byte packet mode because driver expects this */
- if (attr->reg == 0x11)
- value |= ETP_4_BYTE_MODE;
+ if (attr->reg == 0x10) {
+ /* Force on 4 byte mode when absolute mode gets selected */
+ if ((value & ETP_R10_ABSOLUTE_MODE) &&
+ !(etd->reg_11 & ETP_R11_4_BYTE_MODE)) {
+ etd->reg_11 |= ETP_R11_4_BYTE_MODE;
+ elantech_write_reg(psmouse, 0x11, etd->reg_11);
+ psmouse->pktsize = 4;
+ }
+ } else if (attr->reg == 0x11) {
+ if (value & ETP_R11_4_BYTE_MODE)
+ psmouse->pktsize = 4;
+ else {
+ /* Force off absolute mode when 4 byte mode is no longer selected */
+ if (etd->reg_10 & ETP_R10_ABSOLUTE_MODE) {
+ etd->reg_10 ^= ETP_R10_ABSOLUTE_MODE;
+ elantech_write_reg(psmouse, 0x10, etd->reg_10);
+ }
+ psmouse->pktsize = 3;
+ }
+ }
*reg = value;
elantech_write_reg(psmouse, attr->reg, value);
@@ -264,6 +372,7 @@ ELANTECH_INT_ATTR(reg_23, 0x23);
ELANTECH_INT_ATTR(reg_24, 0x24);
ELANTECH_INT_ATTR(reg_25, 0x25);
ELANTECH_INT_ATTR(reg_26, 0x26);
+ELANTECH_INT_ATTR(debug, 0);
static struct attribute *elantech_attrs[] = {
&psmouse_attr_reg_10.dattr.attr,
@@ -275,6 +384,7 @@ static struct attribute *elantech_attrs[
&psmouse_attr_reg_24.dattr.attr,
&psmouse_attr_reg_25.dattr.attr,
&psmouse_attr_reg_26.dattr.attr,
+ &psmouse_attr_debug.dattr.attr,
NULL
};
@@ -312,16 +422,6 @@ int elantech_detect(struct psmouse *psmo
param[0], param[1], param[2]);
return -1;
}
- /* Why does the Elantech Windows driver try this?
- * For now just report it and see if it makes sense
- * when more people use this driver
- */
- if (!synaptics_send_cmd(psmouse, SYN_QUE_MODEL, param))
- pr_info("elantech.c: Synaptics identify query result 0x%02x, 0x%02x, 0x%02x.\n",
- param[0], param[1], param[2]);
- if (!synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, param))
- pr_info("elantech.c: Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
- param[0], param[1], param[2]);
if (set_properties) {
psmouse->vendor = "Elantech";
@@ -336,14 +436,36 @@ int elantech_detect(struct psmouse *psmo
*/
int elantech_init(struct psmouse *psmouse)
{
- struct elantech_data *priv;
- int error;
-
- priv = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
- psmouse->private = priv;
- if (!priv)
+ struct elantech_data *etd;
+ int i, error;
+ unsigned char param[3];
+
+ etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
+ psmouse->private = etd;
+ if (!etd)
return -1;
+ parity[0] = 1;
+ for (i = 1; i < 256; i++)
+ parity[i] = (parity[i & (i - 1)] ^ 1);
+
+ /*
+ * Why does the Elantech Windows driver try this?
+ * For now just report it and see if it makes sense
+ * when more people use this driver
+ */
+ if (!synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, param))
+ pr_info("elantech.c: Synaptics identify query result 0x%02x, 0x%02x, 0x%02x.\n",
+ param[0], param[1], param[2]);
+ if (!synaptics_send_cmd(psmouse, SYN_QUE_MODES, param))
+ pr_info("elantech.c: Synaptics modes query result 0x%02x, 0x%02x, 0x%02x.\n",
+ param[0], param[1], param[2]);
+ if (!synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, param)) {
+ pr_info("elantech.c: Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
+ param[0], param[1], param[2]);
+ etd->capabilities = param[0];
+ }
+
elantech_set_defaults(psmouse);
psmouse->protocol_handler = elantech_process_byte;
@@ -355,7 +477,7 @@ int elantech_init(struct psmouse *psmous
if (error) {
printk(KERN_ERR "elantech.c: failed to create sysfs attributes, error: %d\n",
error);
- kfree(priv);
+ kfree(etd);
return -1;
}
diff -purN -X linux-2.6.23-mm1.vanilla/Documentation/dontdiff linux-2.6.23-mm1.vanilla/drivers/input/mouse/elantech.h linux-2.6.23-mm1.elantech/drivers/input/mouse/elantech.h
--- linux-2.6.23-mm1.vanilla/drivers/input/mouse/elantech.h 2007-10-22 05:17:57.000000000 +0200
+++ linux-2.6.23-mm1.elantech/drivers/input/mouse/elantech.h 2007-10-22 05:25:23.000000000 +0200
@@ -13,7 +13,43 @@
#ifndef _ELANTECH_H
#define _ELANTECH_H
-#define ELANTECH_COMMAND 0x11 /* Commands start with this value */
+/*
+ * Commands start with this value
+ */
+#define ELANTECH_COMMAND_START 0x11
+
+/*
+ * Register bitmasks
+ */
+#define ETP_R10_ABSOLUTE_MODE 0x04
+#define ETP_R11_PARITY_CHECKING 0x01
+#define ETP_R11_4_BYTE_MODE 0x02
+
+/*
+ * Capability bitmasks
+ */
+#define ETP_CAP_REPORTS_MIDDLE_BUTTON 0x02
+#define ETP_CAP_HAS_ROCKER 0x04
+#define ETP_CAP_ALTERNATE_TAP_BITS 0x10
+
+/*
+ * One hard to find application note states that X axis range is 0 to 576
+ * and Y axis range is 0 to 384.
+ * Edge fuzz might be necessary because of bezel around the touchpad.
+ */
+#define ETP_EDGE_FUZZ 32
+
+#define ETP_XMIN ( 0 + ETP_EDGE_FUZZ)
+#define ETP_XMAX (576 - ETP_EDGE_FUZZ)
+#define ETP_YMIN ( 0 + ETP_EDGE_FUZZ)
+#define ETP_YMAX (384 - ETP_EDGE_FUZZ)
+
+/*
+ * It seems the touchpad does not report pressure.
+ * Just choose some values for compatibility with X Synaptics driver
+ */
+#define ETP_MAX_PRESSURE 127
+#define ETP_DEF_PRESSURE 64
struct elantech_data {
unsigned char reg_10;
@@ -25,6 +61,8 @@ struct elantech_data {
unsigned char reg_24;
unsigned char reg_25;
unsigned char reg_26;
+ unsigned char debug;
+ unsigned char capabilities;
};
#ifdef CONFIG_MOUSE_PS2_ELANTECH
-
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