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Date: Sun, 14 Sep 2008 05:23:44 +0200
From: Arjan Opmeer <arjan@...eer.net>
To: akpm@...ux-foundation.org, dtor@...l.ru
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] input: Update Elantech touchpad driver to v5 for kernel
2.6.27-rc5-mm1
From: Arjan Opmeer <arjan@...eer.net>
Update the Elantech touchpad driver to v5
- Put the Elantech entry last in the psmouse_protocols[] list as it is also
the last one in the psmouse_type enum.
- Remove support for relative mode. The driver now always uses the touchpad
in absolute mode.
- Add support for the new Elantech touchpad model as found in the EeePC that
uses a new protocol.
Signed-off-by: Arjan Opmeer <arjan@...eer.net>
---
diff --git a/Documentation/input/elantech.txt b/Documentation/input/elantech.txt
index 679e74b..a10c3b6 100644
--- a/Documentation/input/elantech.txt
+++ b/Documentation/input/elantech.txt
@@ -1,27 +1,125 @@
Elantech Touchpad Driver
========================
- Copyright (C) 2007 Arjan Opmeer <arjan@...eer.net>
- Extra information found and provided by Steve Havelka
+ Copyright (C) 2007-2008 Arjan Opmeer <arjan@...eer.net>
-Configuration of the touchpad is performed by writing values to registers
-found under sysfs entries /sys/bus/serio/drivers/psmouse/serio?/reg_*.
+ Extra information for hardware version 1 found and
+ provided by Steve Havelka
-E.g. to disable tapping while leaving the other settings to the default
-Windows driver value one would:
+ Version 2 (EeePC) hardware support based on patches
+ received from Woody at Xandros and forwarded to me
+ by user StewieGriffin at the eeeuser.com forum
- echo -n 0x32 > reg_10
+Contents
+~~~~~~~~
-Registers
-~~~~~~~~~
+ 1. Introduction
+ 2. Extra knobs
+ 3. Hardware version 1
+ 3.1 Registers
+ 3.2 Native relative mode 4 byte packet format
+ 3.3 Native absolute mode 4 byte packet format
+ 4. Hardware version 2
+ 4.1 Registers
+ 4.2 Native absolute mode 6 byte packet format
+ 4.2.1 One finger touch
+ 4.2.2 Two finger touch
-* reg_10 (Windows driver default value 0x12)
+
+
+1. Introduction
+ ~~~~~~~~~~~~
+
+Currently the Linux Elantech touchpad driver is aware of two different
+hardware versions unimaginatively called version 1 and version 2. Version 1
+is found in "older" laptops and uses 4 bytes per packet. Version 2 seems to
+be introduced with the EeePC and uses 6 bytes per packet.
+
+The driver tries to support both hardware versions and should be compatible
+with the Xorg Synaptics touchpad driver and its graphical configuration
+utilities.
+
+Additionally the operation of the touchpad can be altered by adjusting the
+contents of some of its internal registers. These registers are represented
+by the driver as sysfs entries under /sys/bus/serio/drivers/psmouse/serio?
+that can be read from and written to.
+
+Currently only the registers for hardware version 1 are somewhat understood.
+Hardware version 2 seems to use some of the same registers but it is not
+known whether the bits in the registers represent the same thing or might
+have changed their meaning.
+
+On top of that, some register settings have effect only when the touchpad is
+in relative mode and not in absolute mode. As the Linux Elantech touchpad
+driver always puts the hardware into absolute mode not all information
+mentioned below can be used immediately. But because there is no freely
+available Elantech documentation the information is provided here anyway for
+completeness sake.
+
+
+/////////////////////////////////////////////////////////////////////////////
+
+
+2. Extra knobs
+ ~~~~~~~~~~~
+
+Currently the Linux Elantech touchpad driver provides two extra knobs under
+/sys/bus/serio/drivers/psmouse/serio? for the user.
+
+* debug
+
+ Turn different levels of debugging ON or OFF.
+
+ By echoing "0" to this file all debugging will be turned OFF.
+
+ Currently a value of "1" will turn on some basic debugging and a value of
+ "2" will turn on packet debugging. For hardware version 1 the default is
+ OFF. For version 2 the default is "1".
+
+ Turning packet debugging on will make the driver dump every packet
+ received to the syslog before processing it. Be warned that this can
+ generate quite a lot of data!
+
+* paritycheck
+
+ Turns parity checking ON or OFF.
+
+ By echoing "0" to this file parity checking will be turned OFF. Any
+ non-zero value will turn it ON. For hardware version 1 the default is ON.
+ For version 2 the default it is OFF.
+
+ Hardware version 1 provides basic data integrity verification by
+ calculating a parity bit for the last 3 bytes of each packet. The driver
+ can check these bits and reject any packet that appears corrupted. Using
+ this knob you can bypass that check.
+
+ It is not known yet whether hardware version 2 provides the same parity
+ bits. Hence checking is disabled by default. Currently even turning it on
+ will do nothing.
+
+
+/////////////////////////////////////////////////////////////////////////////
+
+
+3. Hardware version 1
+ ==================
+
+3.1 Registers
+ ~~~~~~~~~
+
+By echoing a hexadecimal value to a register it contents can be altered.
+
+For example:
+
+ echo -n 0x16 > reg_10
+
+* reg_10
bit 7 6 5 4 3 2 1 0
B C T D L A S E
- E: 1 = enable smart edges in other cases
+ E: 1 = enable smart edges unconditionally
S: 1 = enable smart edges only when dragging
A: 1 = absolute mode (needs 4 byte packets, see reg_11)
L: 1 = enable drag lock (see reg_22)
@@ -30,7 +128,7 @@ Registers
C: 1 = enable corner tap
B: 1 = swap left and right button
-* reg_11 (Windows driver default value 0x8f)
+* reg_11
bit 7 6 5 4 3 2 1 0
1 0 0 H V 1 F P
@@ -38,68 +136,49 @@ Registers
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
+ H: 1 = enable horizontal scroll area
-
-* reg_20 (Windows driver default value 0x0a)
+* reg_20
single finger width?
-* reg_21 (Windows driver default value 0x60)
+* reg_21
scroll area width (small: 0x40 ... wide: 0xff)
-* reg_22 (Windows driver default value 0xff)
+* reg_22
- drag lock time out (short: 0x14 ... long: 0xfe; 0xff =never)
+ drag lock time out (short: 0x14 ... long: 0xfe;
+ 0xff = tap again to release)
-* reg_23 (Windows driver default value 0x10)
+* reg_23
tap make timeout?
- Note: the Windows driver does not write this register
-
-* reg_24 (Windows driver default value 0x10)
+* reg_24
tap release timeout?
- Note: the Windows driver does not write this register
-
-* reg_25 (Windows driver default value 0x03)
+* reg_25
smart edge cursor speed (0x02 = slow, 0x03 = medium, 0x04 = fast)
-* reg_26 (Windows driver default value 0x00 ?? )
+* reg_26
smart edge activation area width?
- Note: the Windows driver does not write this register
- Note: the Windows driver default value of 0x00 disables smart edges
- when it would get written
- Note: the Windows driver sets bit 0 of the registry value to disable
- tapping when typing, but never actually writes the register.
- Only used as an internal driver flag?
-
-
-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 relative mode and 4
-byte absolute mode both for which a dedicated driver is needed.
-
-
-Native 4 byte relative mode packet format
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+3.2 Native relative mode 4 byte packet format
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
byte 0:
bit 7 6 5 4 3 2 1 0
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
+ some models have M as byte 3 odd parity bit
+ when parity checking is enabled (reg_11, P = 1):
+ p1..p2 = byte 1 and 2 odd parity bit
c = 1 when corner tap detected
byte 1:
@@ -116,48 +195,73 @@ byte 2:
dy7..dy0 = y movement; positive = up, negative = down
byte 3:
- bit 7 6 5 4 3 2 1 0
- w h n1 n0 d3 d2 d1 d0
+ parity checking enabled (reg_11, P = 1):
+
+ bit 7 6 5 4 3 2 1 0
+ w h n1 n0 ds3 ds2 ds1 ds0
- when parity checking is enabled (P = 1):
normally:
- d3..d0 = scroll wheel amount and direction
- positive = down or left
- negative = up or right
+ ds3..ds0 = 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
+ ds0 = 1 when top right corner tapped
+ ds1 = 1 when bottom right corner tapped
+ ds2 = 1 when bottom left corner tapped
+ ds3 = 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?
+ only models with firmware 2.x report this, models with
+ firmware 1.x seem to map one, two and three finger taps
+ directly to L, M and R mouse buttons
h = 1 when horizontal scroll action
- otherwise (P = 0):
- all of byte 3 is vertical scroll amount and direction
- negative = up
- positive = down
+ w = 1 when wide finger touch?
+
+ otherwise (reg_11, P = 0):
+
+ bit 7 6 5 4 3 2 1 0
+ ds7 ds6 ds5 ds4 ds3 ds2 ds1 ds0
+ ds7..ds0 = vertical scroll amount and direction
+ negative = up
+ positive = down
-Native 4 byte absolute mode packet format
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+3.3 Native absolute mode 4 byte packet format
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
byte 0:
- bit 7 6 5 4 3 2 1 0
- D U p1 p2 1 p3 R L
+ firmware version 1.x:
- L, R = 1 when Left, Right mouse button pressed
- p1..p3 = parity bit of bytes 1..3
- D, U = 1 when rocker switch pressed Up, Down
+ bit 7 6 5 4 3 2 1 0
+ D U p1 p2 1 p3 R L
+
+ L, R = 1 when Left, Right mouse button pressed
+ p1..p3 = byte 1..3 odd parity bit
+ D, U = 1 when rocker switch pressed Up, Down
+
+ firmware version 2.x:
+
+ bit 7 6 5 4 3 2 1 0
+ n1 n0 p2 p1 1 p3 R L
+
+ L, R = 1 when Left, Right mouse button pressed
+ p1..p3 = byte 1..3 odd parity bit
+ n1..n0 = number of fingers on touchpad
byte 1:
- bit 7 6 5 4 3 2 1 0
- f 0 th tw x9 x8 y9 y8
+ firmware version 1.x:
+
+ bit 7 6 5 4 3 2 1 0
+ f 0 th tw x9 x8 y9 y8
+
+ tw = 1 when two finger touch
+ th = 1 when three finger touch
+ f = 1 when finger touch
- tw = 1 when two finger touch
- th = 1 when three finger touch
- f = 1 when finger touch
+ firmware version 2.x:
+
+ bit 7 6 5 4 3 2 1 0
+ . . . . x9 x8 y9 y8
byte 2:
bit 7 6 5 4 3 2 1 0
@@ -170,3 +274,132 @@ byte 3:
y7 y6 y5 y4 y3 y2 y1 y0
y9..y0 = absolute y value (vertical)
+
+
+/////////////////////////////////////////////////////////////////////////////
+
+
+4. Hardware version 2
+ ==================
+
+
+4.1 Registers
+ ~~~~~~~~~
+
+By echoing a hexadecimal value to a register it contents can be altered.
+
+For example:
+
+ echo -n 0x56 > reg_10
+
+* reg_10
+
+ bit 7 6 5 4 3 2 1 0
+ 0 1 0 1 0 1 D 0
+
+ D: 1 = enable drag and drop
+
+* reg_11
+
+ bit 7 6 5 4 3 2 1 0
+ 1 0 0 0 S 0 1 0
+
+ S: 1 = enable vertical scroll
+
+* reg_21
+
+ unknown (0x00)
+
+* reg_22
+
+ drag and drop release time out (short: 0x70 ... long 0x7e;
+ 0x7f = never i.e. tap again to release)
+
+
+4.2 Native absolute mode 6 byte packet format
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+4.2.1 One finger touch
+ ~~~~~~~~~~~~~~~~
+
+byte 0:
+
+ bit 7 6 5 4 3 2 1 0
+ n1 n0 . . . . R L
+
+ L, R = 1 when Left, Right mouse button pressed
+ n1..n0 = numbers of fingers on touchpad
+
+byte 1:
+
+ bit 7 6 5 4 3 2 1 0
+ x15 x14 x13 x12 x11 x10 x9 x8
+
+byte 2:
+
+ bit 7 6 5 4 3 2 1 0
+ x7 x6 x5 x4 x4 x2 x1 x0
+
+ x15..x0 = absolute x value (horizontal)
+
+byte 3:
+
+ bit 7 6 5 4 3 2 1 0
+ . . . . . . . .
+
+byte 4:
+
+ bit 7 6 5 4 3 2 1 0
+ y15 y14 y13 y12 y11 y10 y8 y8
+
+byte 5:
+
+ bit 7 6 5 4 3 2 1 0
+ y7 y6 y5 y4 y3 y2 y1 y0
+
+ y15..y0 = absolute y value (vertical)
+
+
+4.2.2 Two finger touch
+ ~~~~~~~~~~~~~~~~
+
+byte 0:
+
+ bit 7 6 5 4 3 2 1 0
+ n1 n0 ay8 ax8 . . R L
+
+ L, R = 1 when Left, Right mouse button pressed
+ n1..n0 = numbers of fingers on touchpad
+
+byte 1:
+
+ bit 7 6 5 4 3 2 1 0
+ ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0
+
+ ax8..ax0 = first finger absolute x value
+
+byte 2:
+
+ bit 7 6 5 4 3 2 1 0
+ ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0
+
+ ay8..ay0 = first finger absolute y value
+
+byte 3:
+
+ bit 7 6 5 4 3 2 1 0
+ . . by8 bx8 . . . .
+
+byte 4:
+
+ bit 7 6 5 4 3 2 1 0
+ bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0
+
+ bx8..bx0 = second finger absolute x value
+
+byte 5:
+
+ bit 7 6 5 4 3 2 1 0
+ by7 by8 by5 by4 by3 by2 by1 by0
+
+ by8..by0 = second finger absolute y value
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index ea3701b..9bf887c 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1,7 +1,7 @@
/*
- * Elantech Touchpad driver
+ * Elantech Touchpad driver (v5)
*
- * Copyright (C) 2007 Arjan Opmeer <arjan@...eer.net>
+ * Copyright (C) 2007-2008 Arjan Opmeer <arjan@...eer.net>
*
* 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
@@ -10,53 +10,151 @@
* Trademarks are the property of their respective owners.
*/
+#include <linux/delay.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include "psmouse.h"
-#include "synaptics.h"
#include "elantech.h"
+/* Quickest way to access etd->debug in the macro below */
+static struct elantech_data *etd;
+
+#define elantech_debug(format, arg...) \
+ do { \
+ if (etd->debug) \
+ printk(KERN_DEBUG format, ##arg); \
+ } while (0)
+
/*
- * 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.
+ * Send a Synaptics style sliced query command
*/
-static unsigned char parity[256];
+static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
+ unsigned char *param)
+{
+ if (psmouse_sliced_command(psmouse, c) ||
+ ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
+ pr_err("elantech.c: synaptics_send_cmd query 0x%02x failed.\n", c);
+ return -1;
+ }
+
+ return 0;
+}
/*
- * Send a synaptics style special commands
+ * A retrying version of ps2_command
*/
-static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
+static int elantech_ps2_command(struct ps2dev *ps2dev, unsigned char *param,
+ int command)
{
- if (psmouse_sliced_command(psmouse, c))
+ int rc;
+ int tries = ETP_PS2_COMMAND_TRIES;
+
+ do {
+ rc = ps2_command(ps2dev, param, command);
+ if (rc == 0)
+ break;
+ tries--;
+ elantech_debug("elantech.c: retrying ps2 command 0x%02x (%d).\n",
+ command, tries);
+ msleep(ETP_PS2_COMMAND_DELAY);
+ } while (tries > 0);
+
+ if (rc)
+ pr_err("elantech.c: ps2 command 0x%02x failed.\n", command);
+
+ return rc;
+}
+
+/*
+ * Send an Elantech style special command to read a value from a register
+ */
+static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
+ unsigned char *val)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ unsigned char param[3];
+ int rc = 0;
+
+ if ((reg < 0x10) || (reg > 0x26))
return -1;
- if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
+ if ((reg > 0x11) && (reg < 0x20))
return -1;
- return 0;
+
+ switch (etd->hw_version) {
+ case 1:
+ if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) ||
+ psmouse_sliced_command(psmouse, reg) ||
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
+ rc = -1;
+ }
+ break;
+ case 2:
+ if (elantech_ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(ps2dev, NULL, ETP_REGISTER_READ) ||
+ elantech_ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(ps2dev, NULL, reg) ||
+ elantech_ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
+ rc = -1;
+ }
+ break;
+ }
+
+ if (rc)
+ pr_err("elantech.c: failed to read register 0x%02x.\n", reg);
+ else
+ *val = param[0];
+
+ return rc;
}
/*
* Send an Elantech style special command to write a register with a value
*/
-static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, unsigned char val)
+static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
+ unsigned char val)
{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ int rc = 0;
+
if ((reg < 0x10) || (reg > 0x26))
return -1;
if ((reg > 0x11) && (reg < 0x20))
return -1;
- 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)) {
- return -1;
+ switch (etd->hw_version) {
+ case 1:
+ if (psmouse_sliced_command(psmouse, ETP_REGISTER_WRITE) ||
+ psmouse_sliced_command(psmouse, reg) ||
+ psmouse_sliced_command(psmouse, val) ||
+ ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
+ rc = -1;
+ }
+ break;
+ case 2:
+ if (elantech_ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(ps2dev, NULL, ETP_REGISTER_WRITE) ||
+ elantech_ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(ps2dev, NULL, reg) ||
+ elantech_ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(ps2dev, NULL, val) ||
+ elantech_ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
+ rc = -1;
+ }
+ break;
}
- return 0;
+ if (rc)
+ pr_err("elantech.c: failed to write register 0x%02x with value 0x%02x.\n",
+ reg, val);
+
+ return rc;
}
+/*
+ * Dump a complete mouse movement packet to the syslog
+ */
static void elantech_packet_dump(unsigned char *packet, int size)
{
int i;
@@ -68,25 +166,33 @@ static void elantech_packet_dump(unsigned char *packet, int size)
}
/*
- * Report absolute mode input events
+ * Interpret complete data packets and report absolute mode input events for
+ * hardware version 1. (4 byte packets)
*/
-static void elantech_report_absolute(struct psmouse *psmouse)
+static void elantech_report_absolute_v1(struct psmouse *psmouse)
{
- struct elantech_data *etd = psmouse->private;
struct input_dev *dev = psmouse->dev;
unsigned char *packet = psmouse->packet;
int fingers;
- /* 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);
+ if (etd->fw_version_maj == 0x01) {
+ /* byte 0: D U p1 p2 1 p3 R L
+ byte 1: f 0 th tw x9 x8 y9 y8 */
+ fingers = ((packet[1] & 0x80) >> 7) +
+ ((packet[1] & 0x30) >> 4);
+ } else {
+ /* byte 0: n1 n0 p2 p1 1 p3 R L
+ byte 1: 0 0 0 0 x9 x8 y9 y8 */
+ fingers = (packet[0] & 0xc0) >> 6;
+ }
+
input_report_key(dev, BTN_TOUCH, fingers != 0);
- if (fingers == 1) {
+ /* byte 2: x7 x6 x5 x4 x3 x2 x1 x0
+ byte 3: y7 y6 y5 y4 y3 y2 y1 y0 */
+ if (fingers) {
input_report_abs(dev, ABS_X,
((packet[1] & 0x0c) << 6) | packet[2]);
- input_report_abs(dev, ABS_Y, ETP_YMAX -
+ input_report_abs(dev, ABS_Y, ETP_YMAX_V1 -
(((packet[1] & 0x03) << 8) | packet[3]));
}
input_report_abs(dev, ABS_PRESSURE, (fingers) ? ETP_DEF_PRESSURE : 0);
@@ -95,115 +201,118 @@ static void elantech_report_absolute(struct psmouse *psmouse)
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->fw_version_maj == 0x01) &&
+ (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
+ /* rocker up */
+ input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
+ /* rocker down */
+ input_report_key(dev, BTN_BACK, packet[0] & 0x80);
}
}
/*
- * Report relative mode input events
+ * Interpret complete data packets and report absolute mode input events for
+ * hardware version 2. (6 byte packets)
*/
-static void elantech_report_relative(struct psmouse *psmouse)
+static void elantech_report_absolute_v2(struct psmouse *psmouse)
{
- struct elantech_data *etd = psmouse->private;
struct input_dev *dev = psmouse->dev;
unsigned char *packet = psmouse->packet;
- int fingers, cornertap;
+ int fingers, x1, y1, x2, y2;
- /* 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 */
+ /* byte 0: n1 n0 . . . . R L */
+ fingers = (packet[0] & 0xc0) >> 6;
+ input_report_key(dev, BTN_TOUCH, fingers != 0);
+ switch (fingers) {
+ case 1:
+ /* byte 1: x15 x14 x13 x12 x11 x10 x9 x8
+ byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */
+ input_report_abs(dev, ABS_X, (packet[1] << 8) | packet[2]);
+ /* byte 4: y15 y14 y13 y12 y11 y10 y8 y8
+ byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */
+ input_report_abs(dev, ABS_Y, ETP_YMAX_V2 -
+ ((packet[4] << 8) | packet[5]));
+ break;
+ case 2:
+ /* The coordinate of each finger is reported separately with
+ a lower resolution for two finger touches */
+ /* byte 0: . . ay8 ax8 . . . .
+ byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 */
+ x1 = ((packet[0] & 0x10) << 4) | packet[1];
+ /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
+ y1 = ETP_2FT_YMAX - (((packet[0] & 0x20) << 3) | packet[2]);
+ /* byte 3: . . by8 bx8 . . . .
+ byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 */
+ x2 = ((packet[3] & 0x10) << 4) | packet[4];
+ /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
+ y2 = ETP_2FT_YMAX - (((packet[3] & 0x20) << 3) | packet[5]);
+ /* For compatibility with the X Synaptics driver scale up one
+ coordinate and report as ordinary mouse movent */
+ input_report_abs(dev, ABS_X, x1 << 2);
+ input_report_abs(dev, ABS_Y, y1 << 2);
+ /* For compatibility with the proprietary X Elantech driver
+ report both coordinates as hat coordinates */
+ input_report_abs(dev, ABS_HAT0X, x1);
+ input_report_abs(dev, ABS_HAT0Y, y1);
+ input_report_abs(dev, ABS_HAT1X, x2);
+ input_report_abs(dev, ABS_HAT1Y, y2);
+ break;
+ }
+ 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_REPORTS_MIDDLE_BUTTON)
- input_report_key(dev, BTN_MIDDLE, packet[0] & 0x04);
-
- 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 {
- 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));
- }
}
/*
- * Process byte stream from mouse and interpret complete data packets
+ * Process byte stream from mouse and handle complete 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;
+ unsigned char p1, p2, p3;
if (psmouse->pktcnt < psmouse->pktsize)
return PSMOUSE_GOOD_DATA;
- if (etd->debug)
+ if (etd->debug > 1)
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))
+ if (etd->paritycheck) {
+ switch (etd->hw_version) {
+ case 1:
+ /* Parity bits are placed differently */
+ if (etd->fw_version_maj == 0x01) {
+ /* byte 0: D U p1 p2 1 p3 R L */
+ p1 = (packet[0] & 0x20) >> 5;
+ p2 = (packet[0] & 0x10) >> 4;
+ } else {
+ /* byte 0: n1 n0 p2 p1 1 p3 R L */
+ p1 = (packet[0] & 0x10) >> 4;
+ p2 = (packet[0] & 0x20) >> 5;
+ }
+ p3 = (packet[0] & 0x04) >> 2;
+ if ((etd->parity[packet[1]] != p1) ||
+ (etd->parity[packet[2]] != p2) ||
+ (etd->parity[packet[3]] != p3))
return PSMOUSE_BAD_DATA;
+ break;
+ case 2:
+ /* Does version 2 hardware have parity bits? */
+ break;
}
}
- if (etd->reg_10 & ETP_R10_ABSOLUTE_MODE) {
- elantech_report_absolute(psmouse);
- } else {
- elantech_report_relative(psmouse);
+ switch (etd->hw_version) {
+ case 1:
+ elantech_report_absolute_v1(psmouse);
+ break;
+ case 2:
+ elantech_report_absolute_v2(psmouse);
+ break;
}
input_sync(dev);
@@ -212,54 +321,69 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
}
/*
- * Initialise the touchpad to a default state. Because we don't know (yet)
- * how to read registers we need to write some default values so we can
- * report their contents when asked to.
+ * Put the touchpad into absolute mode
*/
-static void elantech_set_defaults(struct psmouse *psmouse)
+static int elantech_set_absolute_mode(struct psmouse *psmouse)
{
- struct elantech_data *etd = psmouse->private;
- struct input_dev *dev = psmouse->dev;
+ int rc = 0;
+ unsigned char val;
+ int tries = ETP_READ_BACK_TRIES;
+
+ switch (etd->hw_version) {
+ case 1:
+ etd->reg_10 = 0x16;
+ etd->reg_11 = 0x8f;
+ if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
+ elantech_write_reg(psmouse, 0x11, etd->reg_11)) {
+ rc = -1;
+ }
+ break;
+ case 2:
+ /* Windows driver values */
+ etd->reg_10 = 0x54;
+ etd->reg_11 = 0x88; /* 0x8a */
+ etd->reg_21 = 0x60; /* 0x00 */
+ if (elantech_write_reg(psmouse, 0x10, etd->reg_10) ||
+ elantech_write_reg(psmouse, 0x11, etd->reg_11) ||
+ elantech_write_reg(psmouse, 0x21, etd->reg_21)) {
+ rc = -1;
+ break;
+ }
+ /*
+ * Read back reg 0x10. The touchpad is probably initalising
+ * and not ready until we read back the value we just wrote.
+ */
+ do {
+ rc = elantech_read_reg(psmouse, 0x10, &val);
+ if (rc == 0)
+ break;
+ tries--;
+ elantech_debug("elantech.c: retrying read (%d).\n",
+ tries);
+ msleep(ETP_READ_BACK_DELAY);
+ } while (tries > 0);
+ if (rc)
+ pr_err("elantech.c: failed to read back register 0x10.\n");
+ break;
+ }
- /*
- * For now, use the Elantech Windows driver default values
- */
- etd->reg_10 = 0x12;
- elantech_write_reg(psmouse, 0x10, etd->reg_10);
- etd->reg_11 = 0x8f;
- elantech_write_reg(psmouse, 0x11, etd->reg_11);
- etd->reg_20 = 0x0a;
- elantech_write_reg(psmouse, 0x20, etd->reg_20);
- etd->reg_21 = 0x60;
- elantech_write_reg(psmouse, 0x21, etd->reg_21);
- etd->reg_22 = 0xff;
- elantech_write_reg(psmouse, 0x22, etd->reg_22);
- /*
- * However, the Windows driver mentions registers 23, 24 and 26
- * but seems to never actually write them
- */
- etd->reg_23 = 0x10;
- /*
- * elantech_write_reg(psmouse, 0x23, etd->reg_23);
- */
- etd->reg_24 = 0x10;
- /*
- * elantech_write_reg(psmouse, 0x24, etd->reg_24);
- */
- etd->reg_25 = 0x03;
- elantech_write_reg(psmouse, 0x25, etd->reg_25);
- /*
- * The Windows driver default value of 0x00 seems wrong as it
- * disables smart edge cursor movement
- */
- etd->reg_26 = 0x00;
- /*
- * elantech_write_reg(psmouse, 0x26, etd->reg_26);
- */
+ if (rc)
+ pr_err("elantech.c: failed to initialise registers.\n");
+
+ return rc;
+}
+
+/*
+ * Set the appropriate event bits for the input subsystem
+ */
+static void elantech_set_input_params(struct psmouse *psmouse)
+{
+ struct input_dev *dev = psmouse->dev;
set_bit(EV_KEY, dev->evbit);
+ set_bit(EV_ABS, dev->evbit);
+
set_bit(BTN_LEFT, dev->keybit);
- set_bit(BTN_MIDDLE, dev->keybit);
set_bit(BTN_RIGHT, dev->keybit);
set_bit(BTN_TOUCH, dev->keybit);
@@ -267,27 +391,26 @@ static void elantech_set_defaults(struct psmouse *psmouse)
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);
+ switch (etd->hw_version) {
+ case 1:
+ /* Rocker button */
+ if ((etd->fw_version_maj == 0x01) &&
+ (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
+ set_bit(BTN_FORWARD, dev->keybit);
+ set_bit(BTN_BACK, dev->keybit);
+ }
+ input_set_abs_params(dev, ABS_X, ETP_XMIN_V1, ETP_XMAX_V1, 0, 0);
+ input_set_abs_params(dev, ABS_Y, ETP_YMIN_V1, ETP_YMAX_V1, 0, 0);
+ break;
+ case 2:
+ input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
+ input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
+ input_set_abs_params(dev, ABS_HAT0X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
+ input_set_abs_params(dev, ABS_HAT0Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
+ input_set_abs_params(dev, ABS_HAT1X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0);
+ input_set_abs_params(dev, ABS_HAT1Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0);
}
- /* Corner taps */
- set_bit(BTN_0, dev->keybit);
- set_bit(BTN_1, dev->keybit);
- set_bit(BTN_2, dev->keybit);
- set_bit(BTN_3, dev->keybit);
-
- set_bit(EV_REL, dev->evbit);
- set_bit(REL_X, dev->relbit);
- set_bit(REL_Y, dev->relbit);
- set_bit(REL_WHEEL, dev->relbit);
- set_bit(REL_HWHEEL, dev->relbit);
-
- 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);
}
@@ -299,14 +422,19 @@ struct elantech_attr_data {
/*
* Display a register value by reading a sysfs entry
*/
-static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, char *buf)
+static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data,
+ char *buf)
{
struct elantech_data *etd = psmouse->private;
struct elantech_attr_data *attr = data;
unsigned char *reg = (unsigned char *)
etd + attr->field_offset;
+ int rc = 0;
+
+ if (attr->reg)
+ rc = elantech_read_reg(psmouse, attr->reg, reg);
- return sprintf(buf, "0x%02x\n", *reg);
+ return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg);
}
/*
@@ -315,40 +443,34 @@ static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, char
static ssize_t elantech_set_int_attr(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
- struct elantech_data *etd = psmouse->private;
- struct elantech_attr_data *attr = data;
+ struct elantech_attr_data *attr = data;
unsigned char *reg = (unsigned char *)
etd + attr->field_offset;
unsigned long value;
- char *rest;
+ int err;
- value = simple_strtoul(buf, &rest, 16);
- if (*rest || value > 255)
+ err = strict_strtoul(buf, 16, &value);
+ if (err)
+ return err;
+ if (value > 0xff)
return -EINVAL;
- 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;
- }
+ /* Do we need to preserve some bits for version 2 hardware too? */
+ if (etd->hw_version == 1) {
+ if (attr->reg == 0x10)
+ /* Force absolute mode always on */
+ value |= ETP_R10_ABSOLUTE_MODE;
+ else if (attr->reg == 0x11)
+ /* Force 4 byte mode always on */
+ value |= ETP_R11_4_BYTE_MODE;
}
- *reg = value;
- elantech_write_reg(psmouse, attr->reg, value);
+ if (attr->reg) {
+ if (elantech_write_reg(psmouse, attr->reg, value) == 0)
+ *reg = value;
+ } else {
+ *reg = value;
+ }
return count;
}
@@ -373,6 +495,7 @@ ELANTECH_INT_ATTR(reg_24, 0x24);
ELANTECH_INT_ATTR(reg_25, 0x25);
ELANTECH_INT_ATTR(reg_26, 0x26);
ELANTECH_INT_ATTR(debug, 0);
+ELANTECH_INT_ATTR(paritycheck, 0);
static struct attribute *elantech_attrs[] = {
&psmouse_attr_reg_10.dattr.attr,
@@ -385,6 +508,7 @@ static struct attribute *elantech_attrs[] = {
&psmouse_attr_reg_25.dattr.attr,
&psmouse_attr_reg_26.dattr.attr,
&psmouse_attr_debug.dattr.attr,
+ &psmouse_attr_paritycheck.dattr.attr,
NULL
};
@@ -393,17 +517,6 @@ static struct attribute_group elantech_attr_group = {
};
/*
- * Clean up sysfs entries when disconnecting
- */
-static void elantech_disconnect(struct psmouse *psmouse)
-{
- sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
- &elantech_attr_group);
- kfree(psmouse->private);
- psmouse->private = NULL;
-}
-
-/*
* Use magic knock to detect Elantech touchpad
*/
int elantech_detect(struct psmouse *psmouse, int set_properties)
@@ -411,12 +524,19 @@ int elantech_detect(struct psmouse *psmouse, int set_properties)
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param[3];
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE);
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
- ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
- ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
+ if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
+ ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
+ ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
+ ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
+ pr_err("elantech.c: sending Elantech magic knock failed.\n");
+ return -1;
+ }
+ /*
+ * Report this in case there are Elantech models that use a different
+ * set of magic numbers
+ */
if ((param[0] != 0x3c) || (param[1] != 0x03) || (param[2] != 0xc8)) {
pr_info("elantech.c: unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n",
param[0], param[1], param[2]);
@@ -432,54 +552,111 @@ int elantech_detect(struct psmouse *psmouse, int set_properties)
}
/*
+ * Clean up sysfs entries when disconnecting
+ */
+static void elantech_disconnect(struct psmouse *psmouse)
+{
+ sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
+ &elantech_attr_group);
+ kfree(psmouse->private);
+ psmouse->private = NULL;
+}
+
+/*
+ * Put the touchpad back into absolute mode when reconnecting
+ */
+static int elantech_reconnect(struct psmouse *psmouse)
+{
+ if (elantech_detect(psmouse, 0))
+ return -1;
+
+ if (elantech_set_absolute_mode(psmouse)) {
+ pr_err("elantech.c: failed to put touchpad back into absolute mode.\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
* Initialize the touchpad and create sysfs entries
*/
int elantech_init(struct psmouse *psmouse)
{
- struct elantech_data *etd;
- int i, error;
- unsigned char param[3];
+ 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;
+ etd->parity[0] = 1;
for (i = 1; i < 256; i++)
- parity[i] = (parity[i & (i - 1)] ^ 1);
+ etd->parity[i] = (etd->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
+ * Find out what version hardware this is
*/
- 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];
+ if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
+ pr_err("elantech.c: failed to query firmware version.\n");
+ goto init_fail;
}
+ pr_info("elantech.c: Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n",
+ param[0], param[1], param[2]);
+ etd->fw_version_maj = param[0];
+ etd->fw_version_min = param[2];
- elantech_set_defaults(psmouse);
+ /*
+ * Assume every version greater than this is new EeePC style
+ * hardware with 6 byte packets
+ */
+ if ((etd->fw_version_maj >= 0x02) && (etd->fw_version_min >= 0x30)) {
+ etd->hw_version = 2;
+ /* For now show extra debug information */
+ etd->debug = 1;
+ /* Don't know how to do parity checking for version 2 */
+ etd->paritycheck = 0;
+ } else {
+ etd->hw_version = 1;
+ etd->paritycheck = 1;
+ }
+ pr_info("elantech.c: assuming hardware version %d, firmware version %d.%d\n",
+ etd->hw_version, etd->fw_version_maj, etd->fw_version_min);
- psmouse->protocol_handler = elantech_process_byte;
- psmouse->disconnect = elantech_disconnect;
- psmouse->pktsize = 4;
+ if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, param)) {
+ pr_err("elantech.c: failed to query capabilities.\n");
+ goto init_fail;
+ }
+ 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];
+
+ if (elantech_set_absolute_mode(psmouse)) {
+ pr_err("elantech.c: failed to put touchpad into absolute mode.\n");
+ goto init_fail;
+ }
+ elantech_set_input_params(psmouse);
error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
&elantech_attr_group);
if (error) {
- printk(KERN_ERR "elantech.c: failed to create sysfs attributes, error: %d\n",
+ pr_err("elantech.c: failed to create sysfs attributes, error: %d.\n",
error);
- kfree(etd);
- return -1;
+ goto init_fail;
}
+ psmouse->protocol_handler = elantech_process_byte;
+ psmouse->disconnect = elantech_disconnect;
+ psmouse->reconnect = elantech_reconnect;
+ if (etd->hw_version == 2)
+ psmouse->pktsize = 6;
+ else
+ psmouse->pktsize = 4;
+
return 0;
+
+init_fail:
+ kfree(etd);
+ return -1;
}
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index e5a6157..3fb996e 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -1,7 +1,7 @@
/*
- * Elantech Touchpad driver
+ * Elantech Touchpad driver (v5)
*
- * Copyright (C) 2007 Arjan Opmeer <arjan@...eer.net>
+ * Copyright (C) 2007-2008 Arjan Opmeer <arjan@...eer.net>
*
* 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
@@ -14,42 +14,86 @@
#define _ELANTECH_H
/*
- * Commands start with this value
+ * Command values for Synaptics style queries
*/
-#define ELANTECH_COMMAND_START 0x11
+#define ETP_FW_VERSION_QUERY 0x01
+#define ETP_CAPABILITIES_QUERY 0x02
/*
- * Register bitmasks
+ * Command values for register reading or writing
+ */
+#define ETP_REGISTER_READ 0x10
+#define ETP_REGISTER_WRITE 0x11
+
+/*
+ * Hardware version 2 custom PS/2 command value
+ */
+#define ETP_PS2_CUSTOM_COMMAND 0xf8
+
+/*
+ * Times to retry a ps2_command and millisecond delay between tries
+ */
+#define ETP_PS2_COMMAND_TRIES 3
+#define ETP_PS2_COMMAND_DELAY 500
+
+/*
+ * Times to try to read back a register and millisecond delay between tries
+ */
+#define ETP_READ_BACK_TRIES 5
+#define ETP_READ_BACK_DELAY 2000
+
+/*
+ * Register bitmasks for hardware version 1
*/
#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.
+ * and Y axis range is 0 to 384 for harware version 1.
+ * Edge fuzz might be necessary because of bezel around the touchpad
+ */
+#define ETP_EDGE_FUZZ_V1 32
+
+#define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
+#define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1)
+#define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1)
+#define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1)
+
+/*
+ * It seems the resolution for hardware version 2 doubled.
+ * Hence the X and Y ranges are doubled too.
+ * The bezel around the pad also appears to be smaller
+ */
+#define ETP_EDGE_FUZZ_V2 8
+
+#define ETP_XMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
+#define ETP_XMAX_V2 (1152 - ETP_EDGE_FUZZ_V2)
+#define ETP_YMIN_V2 ( 0 + ETP_EDGE_FUZZ_V2)
+#define ETP_YMAX_V2 ( 768 - ETP_EDGE_FUZZ_V2)
+
+/*
+ * For two finger touches the coordinate of each finger gets reported
+ * separately but with reduced resolution.
*/
-#define ETP_EDGE_FUZZ 32
+#define ETP_2FT_FUZZ 4
-#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)
+#define ETP_2FT_XMIN ( 0 + ETP_2FT_FUZZ)
+#define ETP_2FT_XMAX (288 - ETP_2FT_FUZZ)
+#define ETP_2FT_YMIN ( 0 + ETP_2FT_FUZZ)
+#define ETP_2FT_YMAX (192 - ETP_2FT_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
+#define ETP_MAX_PRESSURE 255
+#define ETP_DEF_PRESSURE 128
struct elantech_data {
unsigned char reg_10;
@@ -63,6 +107,11 @@ struct elantech_data {
unsigned char reg_26;
unsigned char debug;
unsigned char capabilities;
+ unsigned char fw_version_maj;
+ unsigned char fw_version_min;
+ unsigned char hw_version;
+ unsigned char paritycheck;
+ unsigned char parity[256];
};
#ifdef CONFIG_MOUSE_PS2_ELANTECH
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index d42ff6f..300d960 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -770,6 +770,12 @@ static const struct psmouse_protocol psmouse_protocols[] = {
.detect = touchkit_ps2_detect,
},
#endif
+ {
+ .type = PSMOUSE_CORTRON,
+ .name = "CortronPS/2",
+ .alias = "cortps",
+ .detect = cortron_detect,
+ },
#ifdef CONFIG_MOUSE_PS2_ELANTECH
{
.type = PSMOUSE_ELANTECH,
@@ -780,12 +786,6 @@ static const struct psmouse_protocol psmouse_protocols[] = {
},
#endif
{
- .type = PSMOUSE_CORTRON,
- .name = "CortronPS/2",
- .alias = "cortps",
- .detect = cortron_detect,
- },
- {
.type = PSMOUSE_AUTO,
.name = "auto",
.alias = "any",
--
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