Hi Arjan,
On Fri, Sep 19, 2008 at 09:05:30AM +0200, Arjan Opmeer wrote:
>
> Hi Dmitry,
>
> (Sorry for calling you Dimitry earlier :)
>
> On Fri, Sep 19, 2008 at 12:17:27AM -0400, Dmitry Torokhov wrote:
> > On Sun, Sep 14, 2008 at 05:23:44AM +0200, Arjan Opmeer wrote:
> > >
> > > Update the Elantech touchpad driver to v5
> >
> > Could you tell me if issues with pressure reporting mentioned in bugzilla
> > #8781 have been resolved?
>
> I am not exactly sure what the issue is that is described there.
>
> As far as I know the touchpad does not report pressure (maybe the EeePC
> style touchpad does, but I do not have hands on experience with that).
> However the Xorg Synaptics driver requires pressure events to work. So I
> chose a default pressure value and the driver always toggles between no
> pressure and default pressure for no touch and touch respectively. This
> seems to work well for all my testers as I have not heard any complaints.
>
I see. In this case the driver should not really report ABS_PRESSURE but
only BTN_TOUCH. I understand that this would require synaptics X driver
changes but that should be OK. I wrote a patch to the X driver which
seems to be working if I bastardize my synaptics touchpad but I would
like to have it tested with real Elantech device. I am attaching the
version of Elantech driver that I want to apply (there were some timy
changes) and the patch to teh Synaptics X driver (against recent git
pull from its repository). If you could give it a try that would be
grand.
Thanks!
--
Dmitry
From: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Date: Wed, 15 Oct 2008 22:47:46 -0400
Subject: [PATCH] Add support for touchpads (such as Elantech) that do not report pressure.
Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
---
src/eventcomm.c | 77 +++++++++++++++++++++++++++++++++++-----------------
src/synapticsstr.h | 1 +
2 files changed, 53 insertions(+), 25 deletions(-)
diff --git a/src/eventcomm.c b/src/eventcomm.c
index b2d0891..b5076e3 100644
--- a/src/eventcomm.c
+++ b/src/eventcomm.c
@@ -77,7 +77,9 @@ static Bool
event_query_is_touchpad(int fd)
{
int ret;
- unsigned long evbits[NBITS(KEY_MAX)];
+ unsigned long evbits[NBITS(EV_MAX)];
+ unsigned long absbits[NBITS(ABS_MAX)];
+ unsigned long keybits[NBITS(KEY_MAX)];
/* Check for ABS_X, ABS_Y, ABS_PRESSURE and BTN_TOOL_FINGER */
@@ -89,20 +91,24 @@ event_query_is_touchpad(int fd)
!TEST_BIT(EV_KEY, evbits))
return FALSE;
- SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(evbits)), evbits));
+ SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits));
if (ret < 0)
return FALSE;
- if (!TEST_BIT(ABS_X, evbits) ||
- !TEST_BIT(ABS_Y, evbits) ||
- !TEST_BIT(ABS_PRESSURE, evbits))
+ if (!TEST_BIT(ABS_X, absbits) ||
+ !TEST_BIT(ABS_Y, absbits))
return FALSE;
- SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(evbits)), evbits));
+ SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits));
if (ret < 0)
return FALSE;
- if (!TEST_BIT(BTN_TOOL_FINGER, evbits))
+
+ /* we expect touchpad either report raw pressure or touches */
+ if (!TEST_BIT(ABS_PRESSURE, absbits) && !TEST_BIT(BTN_TOUCH, keybits))
+ return FALSE;
+ /* all Synaptics-like touchpad report BTN_TOOL_FINGER */
+ if (!TEST_BIT(BTN_TOOL_FINGER, keybits))
return FALSE;
- if (TEST_BIT(BTN_TOOL_PEN, evbits))
+ if (TEST_BIT(BTN_TOOL_PEN, keybits))
return FALSE; /* Don't match wacom tablets */
return TRUE;
@@ -114,12 +120,13 @@ event_query_axis_ranges(LocalDevicePtr local)
{
SynapticsPrivate *priv = (SynapticsPrivate *)local->private;
struct input_absinfo abs;
- unsigned long evbits[NBITS(KEY_MAX)];
+ unsigned long absbits[NBITS(ABS_MAX)];
+ unsigned long keybits[NBITS(KEY_MAX)];
char buf[256];
int rc;
SYSCALL(rc = ioctl(local->fd, EVIOCGABS(ABS_X), &abs));
- if (rc == 0)
+ if (rc >= 0)
{
xf86Msg(X_INFO, "%s: x-axis range %d - %d\n", local->name,
abs.minimum, abs.maximum);
@@ -130,7 +137,7 @@ event_query_axis_ranges(LocalDevicePtr local)
strerror(errno));
SYSCALL(rc = ioctl(local->fd, EVIOCGABS(ABS_Y), &abs));
- if (rc == 0)
+ if (rc >= 0)
{
xf86Msg(X_INFO, "%s: y-axis range %d - %d\n", local->name,
abs.minimum, abs.maximum);
@@ -140,17 +147,31 @@ event_query_axis_ranges(LocalDevicePtr local)
xf86Msg(X_ERROR, "%s: failed to query axis range (%s)\n", local->name,
strerror(errno));
- SYSCALL(rc = ioctl(local->fd, EVIOCGABS(ABS_PRESSURE), &abs));
- if (rc == 0)
+ priv->has_pressure = FALSE;
+ SYSCALL(rc = ioctl(local->fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits));
+ if (rc >= 0)
+ priv->has_pressure = TEST_BIT(ABS_PRESSURE, absbits);
+ else
+ xf86Msg(X_ERROR, "%s: failed to query ABS bits (%s)\n", local->name,
+ strerror(errno));
+
+ if (priv->has_pressure)
{
- xf86Msg(X_INFO, "%s: pressure range %d - %d\n", local->name,
- abs.minimum, abs.maximum);
- priv->minp = abs.minimum;
- priv->maxp = abs.maximum;
- }
+ SYSCALL(rc = ioctl(local->fd, EVIOCGABS(ABS_PRESSURE), &abs));
+ if (rc >= 0)
+ {
+ xf86Msg(X_INFO, "%s: pressure range %d - %d\n", local->name,
+ abs.minimum, abs.maximum);
+ priv->minp = abs.minimum;
+ priv->maxp = abs.maximum;
+ }
+ } else
+ xf86Msg(X_ERROR,
+ "%s: device does not report pressure, will use touch data\n",
+ local->name, strerror(errno));
SYSCALL(rc = ioctl(local->fd, EVIOCGABS(ABS_TOOL_WIDTH), &abs));
- if (rc == 0)
+ if (rc >= 0)
{
xf86Msg(X_INFO, "%s: finger width range %d - %d\n", local->name,
abs.minimum, abs.maximum);
@@ -158,19 +179,19 @@ event_query_axis_ranges(LocalDevicePtr local)
priv->maxw = abs.maximum;
}
- SYSCALL(rc = ioctl(local->fd, EVIOCGBIT(EV_KEY, sizeof(evbits)), evbits));
+ SYSCALL(rc = ioctl(local->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits));
if (rc >= 0)
{
buf[0] = 0;
- if ((priv->has_left = TEST_BIT(BTN_LEFT, evbits)))
+ if ((priv->has_left = TEST_BIT(BTN_LEFT, keybits)))
strcat(buf, " left");
- if ((priv->has_right = TEST_BIT(BTN_RIGHT, evbits)))
+ if ((priv->has_right = TEST_BIT(BTN_RIGHT, keybits)))
strcat(buf, " right");
- if ((priv->has_middle = TEST_BIT(BTN_MIDDLE, evbits)))
+ if ((priv->has_middle = TEST_BIT(BTN_MIDDLE, keybits)))
strcat(buf, " middle");
- if ((priv->has_double = TEST_BIT(BTN_TOOL_DOUBLETAP, evbits)))
+ if ((priv->has_double = TEST_BIT(BTN_TOOL_DOUBLETAP, keybits)))
strcat(buf, " double");
- if ((priv->has_triple = TEST_BIT(BTN_TOOL_TRIPLETAP, evbits)))
+ if ((priv->has_triple = TEST_BIT(BTN_TOOL_TRIPLETAP, keybits)))
strcat(buf, " triple");
xf86Msg(X_INFO, "%s: buttons:%s\n", local->name, buf);
}
@@ -229,6 +250,8 @@ EventReadHwState(LocalDevicePtr local, struct SynapticsHwInfo *synhw,
struct input_event ev;
Bool v;
struct SynapticsHwState *hw = &(comm->hwState);
+ SynapticsPrivate *priv = (SynapticsPrivate *)local->private;
+ SynapticsSHM *para = priv->synpara;
while (SynapticsReadEvent(comm, &ev)) {
switch (ev.type) {
@@ -304,6 +327,10 @@ EventReadHwState(LocalDevicePtr local, struct SynapticsHwInfo *synhw,
case BTN_B:
hw->guest_right = v;
break;
+ case BTN_TOUCH:
+ if (!priv->has_pressure)
+ hw->z = v ? para->finger_high + 1 : 0;
+ break;
}
break;
case EV_ABS:
diff --git a/src/synapticsstr.h b/src/synapticsstr.h
index cc0a29f..688167c 100644
--- a/src/synapticsstr.h
+++ b/src/synapticsstr.h
@@ -145,6 +145,7 @@ typedef struct _SynapticsPrivateRec
Bool has_middle; /* middle button detected for this device */
Bool has_double; /* double click detected for this device */
Bool has_triple; /* triple click detected for this device */
+ Bool has_pressure; /* device reports pressure */
} SynapticsPrivate;
#endif /* _SYNAPTICSSTR_H_ */
--
1.5.5.1
Input: psmouse - add support for Elantech touchpads
From: Arjan Opmeer <arjan@xxxxxxxxxx>
This is version 5 of the driver. Relative mode support has been
dropped (users wishing to use touchpad in relative mode can use
standard PS/2 protocol emilation done in hardware). The driver
supports both original version of Elantech protocol and the newer
one used by touchpads installed in EeePC.
Signed-off-by: Arjan Opmeer <arjan@xxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
---
Documentation/input/elantech.txt | 405 ++++++++++++++++++++++
drivers/input/mouse/Kconfig | 25 +
drivers/input/mouse/Makefile | 1
drivers/input/mouse/elantech.c | 674 ++++++++++++++++++++++++++++++++++++
drivers/input/mouse/elantech.h | 124 +++++++
drivers/input/mouse/psmouse-base.c | 23 +
drivers/input/mouse/psmouse.h | 1
7 files changed, 1251 insertions(+), 2 deletions(-)
create mode 100644 Documentation/input/elantech.txt
create mode 100644 drivers/input/mouse/elantech.c
create mode 100644 drivers/input/mouse/elantech.h
diff --git a/Documentation/input/elantech.txt b/Documentation/input/elantech.txt
new file mode 100644
index 0000000..a10c3b6
--- /dev/null
+++ b/Documentation/input/elantech.txt
@@ -0,0 +1,405 @@
+Elantech Touchpad Driver
+========================
+
+ Copyright (C) 2007-2008 Arjan Opmeer <arjan@xxxxxxxxxx>
+
+ Extra information for hardware version 1 found and
+ provided by Steve Havelka
+
+ 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
+
+
+Contents
+~~~~~~~~
+
+ 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
+
+
+
+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 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)
+ D: 1 = disable dynamic resolution
+ T: 1 = disable tapping
+ C: 1 = enable corner tap
+ B: 1 = swap left and right button
+
+* reg_11
+
+ bit 7 6 5 4 3 2 1 0
+ 1 0 0 H V 1 F P
+
+ 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 horizontal scroll area
+
+* reg_20
+
+ single finger width?
+
+* reg_21
+
+ scroll area width (small: 0x40 ... wide: 0xff)
+
+* reg_22
+
+ drag lock time out (short: 0x14 ... long: 0xfe;
+ 0xff = tap again to release)
+
+* reg_23
+
+ tap make timeout?
+
+* reg_24
+
+ tap release timeout?
+
+* reg_25
+
+ smart edge cursor speed (0x02 = slow, 0x03 = medium, 0x04 = fast)
+
+* reg_26
+
+ smart edge activation area width?
+
+
+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 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:
+ bit 7 6 5 4 3 2 1 0
+ dx7 dx6 dx5 dx4 dx3 dx2 dx1 dx0
+
+ dx7..dx0 = x movement; positive = right, negative = left
+ byte 1 = 0xf0 when corner tap detected
+
+byte 2:
+ bit 7 6 5 4 3 2 1 0
+ dy7 dy6 dy5 dy4 dy3 dy2 dy1 dy0
+
+ dy7..dy0 = y movement; positive = up, negative = down
+
+byte 3:
+ parity checking enabled (reg_11, P = 1):
+
+ bit 7 6 5 4 3 2 1 0
+ w h n1 n0 ds3 ds2 ds1 ds0
+
+ normally:
+ ds3..ds0 = scroll wheel amount and direction
+ positive = down or left
+ negative = up or right
+ when corner tap detected:
+ 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
+ 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
+ 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
+
+
+3.3 Native absolute mode 4 byte packet format
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+byte 0:
+ firmware version 1.x:
+
+ 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:
+ 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
+
+ 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
+ x7 x6 x5 x4 x3 x2 x1 x0
+
+ x9..x0 = absolute x value (horizontal)
+
+byte 3:
+ bit 7 6 5 4 3 2 1 0
+ 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/Kconfig b/drivers/input/mouse/Kconfig
index f488b68..4e99342 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -25,8 +25,8 @@ config MOUSE_PS2
mice with wheels and extra buttons, Microsoft, Logitech or Genius
compatible.
- Synaptics TouchPad users might be interested in a specialized
- XFree86 driver at:
+ Synaptics, ALPS or Elantech TouchPad users might be interested
+ in a specialized Xorg/XFree86 driver at:
<http://w1.894.telia.com/~u89404340/touchpad/index.html>
and a new version of GPM at:
<http://www.geocities.com/dt_or/gpm/gpm.html>
@@ -87,6 +87,27 @@ config MOUSE_PS2_TRACKPOINT
If unsure, say Y.
+config MOUSE_PS2_ELANTECH
+ bool "Elantech PS/2 protocol extension"
+ depends on MOUSE_PS2
+ help
+ Say Y here if you have an Elantech PS/2 touchpad connected
+ to your system.
+
+ Note that if you enable this driver you will need an updated
+ X.org Synaptics driver that does not require ABS_PRESSURE
+ reports from the touchpad (i.e. post 1.5.0 version). You can
+ grab a patch for the driver here:
+
+ http://userweb.kernel.org/~dtor/synaptics-no-abspressure.patch
+
+ If unsure, say N.
+
+ This driver exposes some configuration registers via sysfs
+ entries. For further information,
+ see <file:Documentation/input/elantech.txt>.
+
+
config MOUSE_PS2_TOUCHKIT
bool "eGalax TouchKit PS/2 protocol extension"
depends on MOUSE_PS2
diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile
index 8e6e690..96f1dd8 100644
--- a/drivers/input/mouse/Makefile
+++ b/drivers/input/mouse/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_MOUSE_GPIO) += gpio_mouse.o
psmouse-objs := psmouse-base.o synaptics.o
psmouse-$(CONFIG_MOUSE_PS2_ALPS) += alps.o
+psmouse-$(CONFIG_MOUSE_PS2_ELANTECH) += elantech.o
psmouse-$(CONFIG_MOUSE_PS2_OLPC) += hgpk.o
psmouse-$(CONFIG_MOUSE_PS2_LOGIPS2PP) += logips2pp.o
psmouse-$(CONFIG_MOUSE_PS2_LIFEBOOK) += lifebook.o
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
new file mode 100644
index 0000000..b0756c3
--- /dev/null
+++ b/drivers/input/mouse/elantech.c
@@ -0,0 +1,674 @@
+/*
+ * Elantech Touchpad driver (v5)
+ *
+ * Copyright (C) 2007-2008 Arjan Opmeer <arjan@xxxxxxxxxx>
+ *
+ * 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.
+ *
+ * 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 "elantech.h"
+
+#define elantech_debug(format, arg...) \
+ do { \
+ if (etd->debug) \
+ printk(KERN_DEBUG format, ##arg); \
+ } while (0)
+
+/*
+ * Send a Synaptics style sliced query command
+ */
+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;
+}
+
+/*
+ * A retrying version of ps2_command
+ */
+static int elantech_ps2_command(struct psmouse *psmouse,
+ unsigned char *param, int command)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ struct elantech_data *etd = psmouse->private;
+ 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 elantech_data *etd = psmouse->private;
+ unsigned char param[3];
+ int rc = 0;
+
+ if (reg < 0x10 || reg > 0x26)
+ return -1;
+
+ if (reg > 0x11 && reg < 0x20)
+ return -1;
+
+ switch (etd->hw_version) {
+ case 1:
+ if (psmouse_sliced_command(psmouse, ETP_REGISTER_READ) ||
+ psmouse_sliced_command(psmouse, reg) ||
+ ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) {
+ rc = -1;
+ }
+ break;
+
+ case 2:
+ if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) ||
+ elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, reg) ||
+ elantech_ps2_command(psmouse, 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)
+{
+ struct elantech_data *etd = psmouse->private;
+ int rc = 0;
+
+ if (reg < 0x10 || reg > 0x26)
+ return -1;
+
+ if (reg > 0x11 && reg < 0x20)
+ 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(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) {
+ rc = -1;
+ }
+ break;
+
+ case 2:
+ if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) ||
+ elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, reg) ||
+ elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) ||
+ elantech_ps2_command(psmouse, NULL, val) ||
+ elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) {
+ rc = -1;
+ }
+ break;
+ }
+
+ 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;
+
+ printk(KERN_DEBUG "elantech.c: PS/2 packet [");
+ for (i = 0; i < size; i++)
+ printk("%s0x%02x ", (i) ? ", " : " ", packet[i]);
+ printk("]\n");
+}
+
+/*
+ * Interpret complete data packets and report absolute mode input events for
+ * hardware version 1. (4 byte packets)
+ */
+static void elantech_report_absolute_v1(struct psmouse *psmouse)
+{
+ struct input_dev *dev = psmouse->dev;
+ struct elantech_data *etd = psmouse->private;
+ unsigned char *packet = psmouse->packet;
+ int fingers;
+
+ 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);
+
+ /* 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_V1 -
+ (((packet[1] & 0x03) << 8) | packet[3]));
+ }
+
+ 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->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);
+ }
+
+ input_sync(dev);
+}
+
+/*
+ * Interpret complete data packets and report absolute mode input events for
+ * hardware version 2. (6 byte packets)
+ */
+static void elantech_report_absolute_v2(struct psmouse *psmouse)
+{
+ struct input_dev *dev = psmouse->dev;
+ unsigned char *packet = psmouse->packet;
+ int fingers, x1, y1, x2, y2;
+
+ /* 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_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);
+
+ input_sync(dev);
+}
+
+static int elantech_check_parity_v1(struct psmouse *psmouse)
+{
+ struct elantech_data *etd = psmouse->private;
+ unsigned char *packet = psmouse->packet;
+ unsigned char p1, p2, p3;
+
+ /* 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;
+
+ return etd->parity[packet[1]] == p1 &&
+ etd->parity[packet[2]] == p2 &&
+ etd->parity[packet[3]] == p3;
+}
+
+/*
+ * 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;
+
+ if (psmouse->pktcnt < psmouse->pktsize)
+ return PSMOUSE_GOOD_DATA;
+
+ if (etd->debug > 1)
+ elantech_packet_dump(psmouse->packet, psmouse->pktsize);
+
+ switch (etd->hw_version) {
+ case 1:
+ if (etd->paritycheck && !elantech_check_parity_v1(psmouse))
+ return PSMOUSE_BAD_DATA;
+
+ elantech_report_absolute_v1(psmouse);
+ break;
+
+ case 2:
+ /* We don't now how to check parity in protocol v2 */
+ elantech_report_absolute_v2(psmouse);
+ break;
+ }
+
+ return PSMOUSE_FULL_PACKET;
+}
+
+/*
+ * Put the touchpad into absolute mode
+ */
+static int elantech_set_absolute_mode(struct psmouse *psmouse)
+{
+ struct elantech_data *etd = psmouse->private;
+ unsigned char val;
+ int tries = ETP_READ_BACK_TRIES;
+ int rc = 0;
+
+ 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;
+ }
+
+ 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;
+ struct elantech_data *etd = psmouse->private;
+
+ __set_bit(EV_KEY, dev->evbit);
+ __set_bit(EV_ABS, dev->evbit);
+
+ __set_bit(BTN_LEFT, dev->keybit);
+ __set_bit(BTN_RIGHT, dev->keybit);
+
+ __set_bit(BTN_TOUCH, dev->keybit);
+ __set_bit(BTN_TOOL_FINGER, dev->keybit);
+ __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
+ __set_bit(BTN_TOOL_TRIPLETAP, 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);
+ break;
+ }
+}
+
+struct elantech_attr_data {
+ size_t field_offset;
+ unsigned char reg;
+};
+
+/*
+ * Display a register value by reading a sysfs entry
+ */
+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", (attr->reg && rc) ? -1 : *reg);
+}
+
+/*
+ * Write a register value by writing a sysfs entry
+ */
+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;
+ unsigned char *reg = (unsigned char *) etd + attr->field_offset;
+ unsigned long value;
+ int err;
+
+ err = strict_strtoul(buf, 16, &value);
+ if (err)
+ return err;
+
+ if (value > 0xff)
+ return -EINVAL;
+
+ /* 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;
+ }
+
+ if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0)
+ *reg = value;
+
+ return count;
+}
+
+#define ELANTECH_INT_ATTR(_name, _register) \
+ static struct elantech_attr_data elantech_attr_##_name = { \
+ .field_offset = offsetof(struct elantech_data, _name), \
+ .reg = _register, \
+ }; \
+ PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
+ &elantech_attr_##_name, \
+ elantech_show_int_attr, \
+ elantech_set_int_attr)
+
+ELANTECH_INT_ATTR(reg_10, 0x10);
+ELANTECH_INT_ATTR(reg_11, 0x11);
+ELANTECH_INT_ATTR(reg_20, 0x20);
+ELANTECH_INT_ATTR(reg_21, 0x21);
+ELANTECH_INT_ATTR(reg_22, 0x22);
+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);
+ELANTECH_INT_ATTR(paritycheck, 0);
+
+static struct attribute *elantech_attrs[] = {
+ &psmouse_attr_reg_10.dattr.attr,
+ &psmouse_attr_reg_11.dattr.attr,
+ &psmouse_attr_reg_20.dattr.attr,
+ &psmouse_attr_reg_21.dattr.attr,
+ &psmouse_attr_reg_22.dattr.attr,
+ &psmouse_attr_reg_23.dattr.attr,
+ &psmouse_attr_reg_24.dattr.attr,
+ &psmouse_attr_reg_25.dattr.attr,
+ &psmouse_attr_reg_26.dattr.attr,
+ &psmouse_attr_debug.dattr.attr,
+ &psmouse_attr_paritycheck.dattr.attr,
+ NULL
+};
+
+static struct attribute_group elantech_attr_group = {
+ .attrs = elantech_attrs,
+};
+
+/*
+ * Use magic knock to detect Elantech touchpad
+ */
+int elantech_detect(struct psmouse *psmouse, int set_properties)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ unsigned char param[3];
+
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+
+ 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]);
+ return -1;
+ }
+
+ if (set_properties) {
+ psmouse->vendor = "Elantech";
+ psmouse->name = "Touchpad";
+ }
+
+ return 0;
+}
+
+/*
+ * 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];
+
+ etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
+ psmouse->private = etd;
+ if (!etd)
+ return -1;
+
+ etd->parity[0] = 1;
+ for (i = 1; i < 256; i++)
+ etd->parity[i] = (etd->parity[i & (i - 1)] ^ 1);
+
+ /*
+ * Find out what version hardware this is
+ */
+ 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];
+
+ /*
+ * 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);
+
+ 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) {
+ pr_err("elantech.c: failed to create sysfs attributes, error: %d.\n",
+ error);
+ goto init_fail;
+ }
+
+ psmouse->protocol_handler = elantech_process_byte;
+ psmouse->disconnect = elantech_disconnect;
+ psmouse->reconnect = elantech_reconnect;
+ psmouse->pktsize = etd->hw_version == 2 ? 6 : 4;
+
+ return 0;
+
+ init_fail:
+ kfree(etd);
+ return -1;
+}
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
new file mode 100644
index 0000000..bee282b
--- /dev/null
+++ b/drivers/input/mouse/elantech.h
@@ -0,0 +1,124 @@
+/*
+ * Elantech Touchpad driver (v5)
+ *
+ * Copyright (C) 2007-2008 Arjan Opmeer <arjan@xxxxxxxxxx>
+ *
+ * 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.
+ *
+ * Trademarks are the property of their respective owners.
+ */
+
+#ifndef _ELANTECH_H
+#define _ELANTECH_H
+
+/*
+ * Command values for Synaptics style queries
+ */
+#define ETP_FW_VERSION_QUERY 0x01
+#define ETP_CAPABILITIES_QUERY 0x02
+
+/*
+ * 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_4_BYTE_MODE 0x02
+
+/*
+ * Capability bitmasks
+ */
+#define ETP_CAP_HAS_ROCKER 0x04
+
+/*
+ * One hard to find application note states that X axis range is 0 to 576
+ * 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_2FT_FUZZ 4
+
+#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)
+
+struct elantech_data {
+ unsigned char reg_10;
+ unsigned char reg_11;
+ unsigned char reg_20;
+ unsigned char reg_21;
+ unsigned char reg_22;
+ unsigned char reg_23;
+ unsigned char reg_24;
+ unsigned char reg_25;
+ 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
+int elantech_detect(struct psmouse *psmouse, int set_properties);
+int elantech_init(struct psmouse *psmouse);
+#else
+static inline int elantech_detect(struct psmouse *psmouse, int set_properties)
+{
+ return -ENOSYS;
+}
+static inline int elantech_init(struct psmouse *psmouse)
+{
+ return -ENOSYS;
+}
+#endif /* CONFIG_MOUSE_PS2_ELANTECH */
+
+#endif
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 126e977..bad348c 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -29,6 +29,7 @@
#include "lifebook.h"
#include "trackpoint.h"
#include "touchkit_ps2.h"
+#include "elantech.h"
#define DRIVER_DESC "PS/2 mouse driver"
@@ -650,6 +651,19 @@ static int psmouse_extensions(struct psmouse *psmouse,
max_proto = PSMOUSE_IMEX;
}
+/*
+ * Try Elantech touchpad.
+ */
+ if (max_proto > PSMOUSE_IMEX &&
+ elantech_detect(psmouse, set_properties) == 0) {
+ if (!set_properties || elantech_init(psmouse) == 0)
+ return PSMOUSE_ELANTECH;
+/*
+ * Init failed, try basic relative protocols
+ */
+ max_proto = PSMOUSE_IMEX;
+ }
+
if (max_proto > PSMOUSE_IMEX) {
if (genius_detect(psmouse, set_properties) == 0)
return PSMOUSE_GENPS;
@@ -789,6 +803,15 @@ static const struct psmouse_protocol psmouse_protocols[] = {
.detect = hgpk_detect,
},
#endif
+#ifdef CONFIG_MOUSE_PS2_ELANTECH
+ {
+ .type = PSMOUSE_ELANTECH,
+ .name = "ETPS/2",
+ .alias = "elantech",
+ .detect = elantech_detect,
+ .init = elantech_init,
+ },
+ #endif
{
.type = PSMOUSE_CORTRON,
.name = "CortronPS/2",
diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
index 8b608a1..54ed267 100644
--- a/drivers/input/mouse/psmouse.h
+++ b/drivers/input/mouse/psmouse.h
@@ -90,6 +90,7 @@ enum psmouse_type {
PSMOUSE_TOUCHKIT_PS2,
PSMOUSE_CORTRON,
PSMOUSE_HGPK,
+ PSMOUSE_ELANTECH,
PSMOUSE_AUTO /* This one should always be last */
};
