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Diffstat (limited to 'drivers/input/mouse/elantech.c')
-rw-r--r--drivers/input/mouse/elantech.c674
1 files changed, 674 insertions, 0 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
new file mode 100644
index 000000000000..b9a25d57bc5e
--- /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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 18:40:12 +0100