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-rw-r--r--drivers/input/mouse/Kconfig25
-rw-r--r--drivers/input/mouse/Makefile1
-rw-r--r--drivers/input/mouse/elantech.c674
-rw-r--r--drivers/input/mouse/elantech.h124
-rw-r--r--drivers/input/mouse/psmouse-base.c23
-rw-r--r--drivers/input/mouse/psmouse.h1
6 files changed, 846 insertions, 2 deletions
diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index f488b6852ba..4e993425977 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 8e6e6909780..96f1dd8037f 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 00000000000..b9a25d57bc5
--- /dev/null
+++ b/drivers/input/mouse/elantech.c
@@ -0,0 +1,674 @@
+/*
+ * Elantech Touchpad driver (v5)
+ *
+ * Copyright (C) 2007-2008 Arjan Opmeer <arjan@opmeer.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
+ * 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 know 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 00000000000..bee282b540b
--- /dev/null
+++ b/drivers/input/mouse/elantech.h
@@ -0,0 +1,124 @@
+/*
+ * Elantech Touchpad driver (v5)
+ *
+ * Copyright (C) 2007-2008 Arjan Opmeer <arjan@opmeer.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
+ * 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 126e977e199..f8f86de694b 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 8b608a1cdd1..54ed267894b 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 */
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 00:12:24 +0000