[PATCH v4 2/4] input: Cypress PS/2 Trackpad psmouse driver
From: Kamal Mostafa
Date: Tue Dec 04 2012 - 21:24:51 EST
From: Dudley Du <dudl@xxxxxxxxxxx>
Input/mouse driver for Cypress PS/2 Trackpad.
Original code contributed by Dudley Du (Cypress Semiconductor Corporation),
modified by Kamal Mostafa and Kyle Fazzari.
BugLink: http://launchpad.net/bugs/978807
Signed-off-by: Dudley Du <dudl@xxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
Signed-off-by: Kyle Fazzari <git@xxxxxxxxxxxxxxxxx>
Signed-off-by: Mario Limonciello <mario_limonciello@xxxxxxxx>
Signed-off-by: Tim Gardner <tim.gardner@xxxxxxxxxxxxx>
Acked-by: Herton Krzesinski <herton.krzesinski@xxxxxxxxxxxxx>
---
drivers/input/mouse/cypress_ps2.c | 835 +++++++++++++++++++++++++++++++++++++
drivers/input/mouse/cypress_ps2.h | 219 ++++++++++
2 files changed, 1054 insertions(+)
create mode 100644 drivers/input/mouse/cypress_ps2.c
create mode 100644 drivers/input/mouse/cypress_ps2.h
diff --git a/drivers/input/mouse/cypress_ps2.c b/drivers/input/mouse/cypress_ps2.c
new file mode 100644
index 0000000..fab4d18
--- /dev/null
+++ b/drivers/input/mouse/cypress_ps2.c
@@ -0,0 +1,835 @@
+/*
+ * Cypress Trackpad PS/2 mouse driver
+ *
+ * Copyright (c) 2012 Cypress Semiconductor Corporation.
+ *
+ * Author:
+ * Dudley Du <dudl@xxxxxxxxxxx>
+ *
+ * Additional contributors include:
+ * Kamal Mostafa <kamal@xxxxxxxxxxxxx>
+ * Kyle Fazzari <git@xxxxxxxxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/serio.h>
+#include <linux/libps2.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+
+#include "cypress_ps2.h"
+
+#undef CYTP_DEBUG_VERBOSE /* define this and DEBUG for more verbose dump */
+
+#undef CYTP_RELATIVE_SUPPORT /* define to enable unused EV_REL code */
+
+#define cytp_dbg(fmt, ...) psmouse_dbg(psmouse, pr_fmt(fmt), ##__VA_ARGS__)
+
+
+static int is_cypress_key(const unsigned char *param)
+{
+ return (param[0] == CYPRESS_KEY_1) && (param[1] == CYPRESS_KEY_2);
+}
+
+static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n)
+{
+ struct cytp_data *cytp = psmouse->private;
+ psmouse->pktsize = cytp->pkt_size = n;
+}
+
+static void cypress_set_abs_rel_mode(struct cytp_data *cytp,
+ unsigned int cytp_mode_bit)
+{
+ cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK) | cytp_mode_bit;
+}
+
+static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200};
+static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03};
+
+static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+
+ if (ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT) < 0) {
+ cytp_dbg("send command 0x%02x failed, resp 0x%02x\n",
+ value & 0xff, ps2dev->nak);
+ if (ps2dev->nak == CYTP_PS2_RETRY)
+ return CYTP_PS2_RETRY;
+ else
+ return CYTP_PS2_ERROR;
+ }
+
+ cytp_dbg("send command 0x%02x success, resp 0xfa\n", value & 0xff);
+
+ return 0;
+}
+
+static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd,
+ unsigned char data)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ int tries = CYTP_PS2_CMD_TRIES;
+ int rc;
+
+ ps2_begin_command(ps2dev);
+
+ do {
+ /*
+ * send extension command 0xE8 or 0xF3,
+ * if send extension command failed,
+ * try to send recovery command to make
+ * trackpad device return to ready wait command state.
+ * It alwasy success based on this recovery commands.
+ */
+ rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff);
+ if (rc == CYTP_PS2_RETRY) {
+ rc = cypress_ps2_sendbyte(psmouse, 0x00);
+ if (rc == CYTP_PS2_RETRY)
+ rc = cypress_ps2_sendbyte(psmouse, 0x0a);
+ }
+ if (rc == CYTP_PS2_ERROR)
+ continue;
+
+ rc = cypress_ps2_sendbyte(psmouse, data);
+ if (rc == CYTP_PS2_RETRY)
+ rc = cypress_ps2_sendbyte(psmouse, data);
+ if (rc == CYTP_PS2_ERROR)
+ continue;
+ else
+ break;
+ } while (--tries > 0);
+
+ ps2_end_command(ps2dev);
+
+ return rc;
+}
+
+static int cypress_ps2_read_cmd_status(struct psmouse *psmouse,
+ unsigned char cmd,
+ unsigned char *param)
+{
+ int i;
+ int rc;
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ enum psmouse_state old_state;
+ unsigned char old_pktsize;
+
+ ps2_begin_command(&psmouse->ps2dev);
+
+ old_state = psmouse->state;
+ psmouse->state = PSMOUSE_CMD_MODE;
+ psmouse->pktcnt = 0;
+ old_pktsize = psmouse->pktsize;
+ psmouse->pktsize = 3;
+ if (cmd == CYTP_CMD_READ_VITAL_STATISTICS)
+ psmouse->pktsize = 8;
+ memset(param, 0, psmouse->pktsize);
+
+ rc = cypress_ps2_sendbyte(psmouse, 0xe9);
+ if (rc < 0)
+ goto out;
+
+ wait_event_timeout(ps2dev->wait,
+ (psmouse->pktcnt >= psmouse->pktsize),
+ msecs_to_jiffies(CYTP_CMD_TIMEOUT));
+
+ memcpy(param, psmouse->packet, psmouse->pktsize);
+
+ cytp_dbg("Command 0x%02x response data: (0x)", cmd);
+ for (i = 0; i < psmouse->pktsize; i++)
+ cytp_dbg(" %02x", param[i]);
+ cytp_dbg("\n");
+
+out:
+ psmouse->state = old_state;
+ psmouse->pktcnt = 0;
+ psmouse->pktsize = old_pktsize;
+
+ ps2_end_command(&psmouse->ps2dev);
+
+ return rc;
+}
+
+static int cypress_verify_cmd_state(struct psmouse *psmouse,
+ unsigned char cmd, unsigned char *param)
+{
+ bool rate_match = 0;
+ bool resolution_match = 0;
+ int i;
+
+ /* callers will do further checking. */
+ if ((cmd == CYTP_CMD_READ_CYPRESS_ID) ||
+ (cmd == CYTP_CMD_STANDARD_MODE) ||
+ (cmd == CYTP_CMD_READ_VITAL_STATISTICS))
+ return 0;
+ if (((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID) &&
+ ((param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE)) {
+ for (i = 0; i < sizeof(cytp_resolution); i++)
+ if (cytp_resolution[i] == param[1])
+ resolution_match = 1;
+
+ for (i = 0; i < sizeof(cytp_rate); i++)
+ if (cytp_rate[i] == param[2])
+ rate_match = 1;
+
+ if (resolution_match && rate_match)
+ return 0;
+ }
+
+ cytp_dbg("verify cmd state failed.\n");
+ return -1;
+}
+
+static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd,
+ unsigned char *param)
+{
+ int tries = CYTP_PS2_CMD_TRIES;
+ int rc;
+
+ cytp_dbg("send extension cmd 0x%02x, [%d %d %d %d]\n",
+ cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd),
+ DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd));
+ do {
+ cypress_ps2_ext_cmd(psmouse,
+ PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd));
+ cypress_ps2_ext_cmd(psmouse,
+ PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd));
+ cypress_ps2_ext_cmd(psmouse,
+ PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd));
+ cypress_ps2_ext_cmd(psmouse,
+ PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd));
+
+ rc = cypress_ps2_read_cmd_status(psmouse, cmd, param);
+ if (rc)
+ continue;
+
+ rc = cypress_verify_cmd_state(psmouse, cmd, param);
+ if (rc == 0)
+ return 0;
+ } while (--tries > 0);
+
+ return -1;
+}
+
+int cypress_detect(struct psmouse *psmouse, bool set_properties)
+{
+ unsigned char param[3];
+
+ if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
+ return -1;
+
+ if (!is_cypress_key(param))
+ return -ENODEV;
+
+ if (set_properties) {
+ psmouse->vendor = "Cypress";
+ psmouse->name = "Trackpad";
+ }
+
+ return 0;
+}
+
+static int cypress_read_fw_version(struct psmouse *psmouse)
+{
+ struct cytp_data *cytp = psmouse->private;
+ unsigned char param[3];
+
+ if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param))
+ return -1;
+
+ if (!is_cypress_key(param))
+ return -ENODEV;
+
+ cytp->fw_version = param[2] & FW_VERSION_MASX;
+ cytp->vital_statics_supported = (param[2] & VITAL_STATICS_MASK) ? 1 : 0;
+
+ cytp_dbg("cytp->fw_version = %d\n", cytp->fw_version);
+ cytp_dbg("cytp->vital_statics_supported = %d\n",
+ cytp->vital_statics_supported);
+ return 0;
+}
+
+static int cypress_read_vital_statistics(struct psmouse *psmouse)
+{
+ struct cytp_data *cytp = psmouse->private;
+ unsigned char param[8];
+
+ /* set default values for vital statistics not supported trackpad. */
+ cytp->tp_width = CYTP_DEFAULT_WIDTH;
+ cytp->tp_high = CYTP_DEFAULT_HIGH;
+ cytp->tp_max_abs_x = CYTP_ABS_MAX_X;
+ cytp->tp_max_abs_y = CYTP_ABS_MAX_Y;
+ cytp->tp_min_pressure = CYTP_MIN_PRESSURE;
+ cytp->tp_max_pressure = CYTP_MAX_PRESSURE;
+ cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
+ cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;
+
+ memset(param, 0, sizeof(param));
+ if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_VITAL_STATISTICS, param) == 0) {
+ /* Update trackpad parameters. */
+ cytp->tp_max_abs_x = (param[1] << 8) | param[0];
+ cytp->tp_max_abs_y = (param[3] << 8) | param[2];
+ cytp->tp_min_pressure = param[4];
+ cytp->tp_max_pressure = param[5];
+
+ if (param[6] & VITAL_BIT_APA)
+ cytp->tp_type = CYTP_APA;
+ else if (param[6] & VITAL_BIT_MTG)
+ cytp->tp_type = CYTP_MTG;
+ else
+ cytp->tp_type = CYTP_STG;
+ cytp->tp_palm = (param[6] & VITAL_BIT_PALM) ? 1 : 0;
+ cytp->tp_stubborn = (param[6] & VITAL_BIT_STUBBORN) ? 1 : 0;
+ cytp->tp_2f_jitter = (param[6] & VITAL_BIT_2F_JITTER) >> 4;
+ cytp->tp_1f_jitter = (param[6] & VITAL_BIT_1F_JITTER) >> 2;
+ cytp->tp_abs_packet_format_set =
+ (param[7] & VITAL_BIT_ABS_PKT_FORMAT_SET) >> 4;
+ cytp->tp_2f_spike = (param[7] & VITAL_BIT_2F_SPIKE) >> 2;
+ cytp->tp_1f_spike = (param[7] & VITAL_BIT_1F_SPIKE);
+
+ }
+
+ if (!cytp->tp_max_pressure ||
+ (cytp->tp_max_pressure < cytp->tp_min_pressure) ||
+ (!cytp->tp_width || !cytp->tp_high) ||
+ (!cytp->tp_max_abs_x) ||
+ (cytp->tp_max_abs_x < cytp->tp_width) ||
+ (!cytp->tp_max_abs_y) ||
+ (cytp->tp_max_abs_y < cytp->tp_high))
+ return -1;
+
+ cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width;
+ cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high;
+
+#ifdef CYTP_DEBUG_VERBOSE
+ cytp_dbg("Dump trackpad hardware configuration as below:\n");
+ cytp_dbg("cytp->tp_width = %d\n", cytp->tp_width);
+ cytp_dbg("cytp->tp_high = %d\n", cytp->tp_high);
+ cytp_dbg("cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x);
+ cytp_dbg("cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y);
+ cytp_dbg("cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure);
+ cytp_dbg("cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure);
+ cytp_dbg("cytp->tp_res_x = %d\n", cytp->tp_res_x);
+ cytp_dbg("cytp->tp_res_y = %d\n", cytp->tp_res_y);
+ cytp_dbg("cytp->tp_type = %d\n", cytp->tp_type);
+ cytp_dbg("cytp->tp_palm = %d\n", cytp->tp_palm);
+ cytp_dbg("cytp->tp_stubborn = %d\n", cytp->tp_stubborn);
+ cytp_dbg("cytp->tp_1f_jitter = %d\n", cytp->tp_1f_jitter);
+ cytp_dbg("cytp->tp_2f_jitter = %d\n", cytp->tp_2f_jitter);
+ cytp_dbg("cytp->tp_1f_spike = %d\n", cytp->tp_1f_spike);
+ cytp_dbg("cytp->tp_2f_spike = %d\n", cytp->tp_2f_spike);
+ cytp_dbg("cytp->tp_abs_packet_format_set = %d\n",
+ cytp->tp_abs_packet_format_set);
+#endif
+
+ return 0;
+}
+
+static int cypress_query_hardware(struct psmouse *psmouse)
+{
+ struct cytp_data *cytp = psmouse->private;
+ int ret;
+
+ ret = cypress_read_fw_version(psmouse);
+ if (ret)
+ return ret;
+
+ if (cytp->vital_statics_supported) {
+ ret = cypress_read_vital_statistics(psmouse);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int cypress_set_absolute_mode(struct psmouse *psmouse)
+{
+ struct cytp_data *cytp = psmouse->private;
+ unsigned char param[3];
+
+ if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0)
+ return -1;
+
+ cypress_set_abs_rel_mode(cytp, CYTP_BIT_ABS_PRESSURE);
+ cypress_set_packet_size(psmouse, 5);
+
+ return 0;
+}
+
+/*
+ * reset trackpad device to standard relative mode.
+ * This is also the defalut mode when trackpad powered on.
+ */
+static void cypress_reset(struct psmouse *psmouse)
+{
+ struct cytp_data *cytp = psmouse->private;
+
+ psmouse_reset(psmouse);
+
+ cypress_set_abs_rel_mode(cytp, CYTP_BIT_STANDARD_REL);
+ cypress_set_packet_size(psmouse, 3);
+
+ cytp->prev_contact_cnt = 0;
+}
+
+static int cypress_set_input_params(struct input_dev *input,
+ struct cytp_data *cytp)
+{
+ int ret;
+
+#ifdef CYTP_RELATIVE_SUPPORT
+ if (cytp->mode & CYTP_BIT_ABS_MASK)
+#endif
+ {
+ __set_bit(EV_ABS, input->evbit);
+ input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0);
+ input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0);
+ input_set_abs_params(input, ABS_PRESSURE,
+ cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0);
+ input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0);
+
+ /* finger position */
+ input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0);
+ input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0);
+
+ ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS,
+ INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK);
+ if (ret < 0)
+ return ret;
+
+ __set_bit(INPUT_PROP_SEMI_MT, input->propbit);
+
+ if (cytp->tp_res_x && cytp->tp_res_y) {
+ input_abs_set_res(input, ABS_X, cytp->tp_res_x);
+ input_abs_set_res(input, ABS_Y, cytp->tp_res_y);
+
+ input_abs_set_res(input, ABS_MT_POSITION_X,
+ cytp->tp_res_x);
+ input_abs_set_res(input, ABS_MT_POSITION_Y,
+ cytp->tp_res_y);
+
+ }
+
+ __set_bit(BTN_TOUCH, input->keybit);
+ __set_bit(BTN_TOOL_FINGER, input->keybit);
+ __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
+ __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
+ __set_bit(BTN_TOOL_QUADTAP, input->keybit);
+ __set_bit(BTN_TOOL_QUINTTAP, input->keybit);
+
+ __clear_bit(EV_REL, input->evbit);
+ __clear_bit(REL_X, input->relbit);
+ __clear_bit(REL_Y, input->relbit);
+ }
+#ifdef CYTP_RELATIVE_SUPPORT
+ else {
+ __set_bit(EV_REL, input->evbit);
+ __set_bit(REL_X, input->relbit);
+ __set_bit(REL_Y, input->relbit);
+ __set_bit(REL_WHEEL, input->relbit);
+ __set_bit(REL_HWHEEL, input->relbit);
+
+ __clear_bit(EV_ABS, input->evbit);
+ }
+#endif
+
+ __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
+ __set_bit(EV_KEY, input->evbit);
+ __set_bit(BTN_LEFT, input->keybit);
+ __set_bit(BTN_RIGHT, input->keybit);
+ __set_bit(BTN_MIDDLE, input->keybit);
+
+ input_set_drvdata(input, cytp);
+
+ return 0;
+}
+
+static int cypress_get_finger_count(unsigned char header_byte)
+{
+ unsigned char bits6_7;
+ int finger_count;
+
+ bits6_7 = header_byte >> 6;
+ finger_count = bits6_7 & 0x03;
+
+ if (finger_count == 1)
+ return 1;
+
+ if (header_byte & ABS_HSCROLL_BIT) {
+ if (finger_count == 0) {
+ /* HSCROLL gets added on to 0 finger count. */
+ finger_count = 4;
+ /* should remove HSCROLL bit. */
+ } else {
+ if (finger_count == 2) {
+ finger_count = 5;
+ } else {
+ /* Invalid contact (e.g. palm). Ignore it. */
+ finger_count = 0;
+ }
+ }
+ }
+
+ return finger_count;
+}
+
+
+static int cypress_parse_packet(struct psmouse *psmouse,
+ struct cytp_data *cytp, struct cytp_report_data *report_data)
+{
+ unsigned char *packet = psmouse->packet;
+ unsigned char header_byte = packet[0];
+
+ memset(report_data, 0, sizeof(struct cytp_report_data));
+#ifdef CYTP_RELATIVE_SUPPORT
+ if (cytp->mode & CYTP_BIT_ABS_MASK)
+#endif
+ {
+ report_data->contact_cnt = cypress_get_finger_count(header_byte);
+
+ report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0;
+
+ /* Remove HSCROLL bit */
+ if (report_data->contact_cnt == 4)
+ header_byte &= ~(ABS_HSCROLL_BIT);
+
+ if (report_data->contact_cnt == 1) {
+ report_data->contacts[0].x =
+ ((packet[1] & 0x70) << 4) | packet[2];
+ report_data->contacts[0].y =
+ ((packet[1] & 0x07) << 8) | packet[3];
+ if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
+ report_data->contacts[0].z = packet[4];
+
+ if ((packet[1] & ABS_EDGE_MOTION_MASK) != ABS_EDGE_MOTION_MASK) {
+ report_data->vscroll = (header_byte & ABS_VSCROLL_BIT) ? 1 : 0;
+ report_data->hscroll = (header_byte & ABS_HSCROLL_BIT) ? 1 : 0;
+ }
+
+ } else if (report_data->contact_cnt >= 2) {
+ report_data->contacts[0].x =
+ ((packet[1] & 0x70) << 4) | packet[2];
+ report_data->contacts[0].y =
+ ((packet[1] & 0x07) << 8) | packet[3];
+ if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
+ report_data->contacts[0].z = packet[4];
+
+ report_data->contacts[1].x =
+ ((packet[5] & 0xf0) << 4) | packet[6];
+ report_data->contacts[1].y =
+ ((packet[5] & 0x0f) << 8) | packet[7];
+ if (cytp->mode & CYTP_BIT_ABS_PRESSURE)
+ report_data->contacts[1].z = report_data->contacts[0].z;
+ }
+
+ report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0;
+ report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0;
+
+ }
+#ifdef CYTP_RELATIVE_SUPPORT
+ else {
+ report_data->contact_cnt = 1;
+ report_data->contacts[0].x =
+ (packet[0] & REL_X_SIGN_BIT) ? -packet[1] : packet[1];
+ report_data->contacts[0].y =
+ (packet[0] & REL_Y_SIGN_BIT) ? -packet[2] : packet[2];
+ report_data->vscroll = packet[3];
+ report_data->left = (packet[0] & BTN_LEFT_BIT) ? 1 : 0;
+ report_data->right = (packet[0] & BTN_RIGHT_BIT) ? 1 : 0;
+
+ if (cytp->mode & CYTP_BIT_STANDARD_REL)
+ report_data->middle =
+ (packet[0] & BTN_MIDDLE_BIT) ? 1 : 0;
+ if (cytp->mode & CYTP_BIT_CYPRESS_REL) {
+ report_data->left =
+ (packet[0] & BTN_MIDDLE_BIT) ? 1 : 0;
+ report_data->hscroll = packet[4];
+ }
+ }
+#endif
+
+ /* This is only true if one of the mouse buttons were tapped.
+ * Make sure it doesn't turn into a click. The regular tap-to-
+ * click functionality will handle that on its own. If we don't
+ * do this, disabling tap-to-click won't affect the mouse button
+ * zones. */
+ if (report_data->tap)
+ report_data->left = 0;
+
+ if (report_data->contact_cnt <= 0)
+ return 0;
+
+#ifdef CYTP_DEBUG_VERBOSE
+ {
+ int i;
+ int n = report_data->contact_cnt;
+ cytp_dbg("cypress_parse_packet cytp->zero_packet_cnt = %d\n",
+ cytp->zero_packet_cnt);
+ cytp_dbg("Dump parsed report data as below:\n");
+ cytp_dbg("contact_cnt = %d\n", report_data->contact_cnt);
+ if (n > CYTP_MAX_CONTACTS)
+ n = CYTP_MAX_CONTACTS;
+ for (i = 0; i < n; i++)
+ cytp_dbg("contacts[%d] = {%d, %d, %d}\n", i,
+ report_data->contacts[i].x,
+ report_data->contacts[i].y,
+ report_data->contacts[i].z);
+ cytp_dbg("vscroll = %d\n", report_data->vscroll);
+ cytp_dbg("hscroll = %d\n", report_data->hscroll);
+ cytp_dbg("left = %d\n", report_data->left);
+ cytp_dbg("right = %d\n", report_data->right);
+ cytp_dbg("middle = %d\n", report_data->middle);
+ }
+#endif
+
+ return 0;
+}
+
+static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt)
+{
+ int i;
+ struct input_dev *input = psmouse->dev;
+ struct cytp_data *cytp = psmouse->private;
+ struct cytp_report_data report_data;
+ struct cytp_contact *contact;
+
+ if (cypress_parse_packet(psmouse, cytp, &report_data))
+ return;
+
+#ifdef CYTP_RELATIVE_SUPPORT
+ if (cytp->mode & CYTP_BIT_ABS_MASK)
+#endif
+ {
+ struct input_mt_pos pos[CYTP_MAX_CONTACTS];
+ int slots[CYTP_MAX_MT_SLOTS];
+ int n = report_data.contact_cnt;
+
+ if (n > CYTP_MAX_MT_SLOTS)
+ n = CYTP_MAX_MT_SLOTS;
+
+ for (i = 0; i < n; i++) {
+ contact = &report_data.contacts[i];
+ pos[i].x = contact->x;
+ pos[i].y = contact->y;
+ }
+
+ input_mt_assign_slots(input, slots, pos, n);
+
+ for (i = 0; i < n; i++) {
+ contact = &report_data.contacts[i];
+ input_mt_slot(input, slots[i]);
+ input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+ input_report_abs(input, ABS_MT_POSITION_X, contact->x);
+ input_report_abs(input, ABS_MT_POSITION_Y, contact->y);
+ input_report_abs(input, ABS_MT_PRESSURE, contact->z);
+ }
+
+ input_mt_sync_frame(input);
+
+ input_mt_report_finger_count(input, report_data.contact_cnt);
+
+ }
+#ifdef CYTP_RELATIVE_SUPPORT
+ else {
+ if (report_data.contact_cnt == 1) {
+ input_report_rel(input, REL_X, report_data.contacts[0].x);
+ input_report_rel(input, REL_Y, report_data.contacts[0].y);
+ }
+
+ input_report_rel(input, REL_WHEEL, report_data.vscroll);
+ if (cytp->mode & CYTP_BIT_CYPRESS_REL)
+ input_report_rel(input, REL_HWHEEL, report_data.hscroll);
+ }
+#endif
+
+ input_report_key(input, BTN_LEFT, report_data.left);
+ input_report_key(input, BTN_RIGHT, report_data.right);
+ input_report_key(input, BTN_MIDDLE, report_data.middle);
+
+ input_sync(input);
+}
+
+static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse)
+{
+ int contact_cnt;
+ int index = psmouse->pktcnt - 1;
+ unsigned char *packet = psmouse->packet;
+ struct cytp_data *cytp = psmouse->private;
+
+ if (index < 0 || index > cytp->pkt_size)
+ return PSMOUSE_BAD_DATA;
+
+ if ((index == 0) && ((packet[0] & 0xfc) == 0)) {
+ /* call packet process for reporting finger leave. */
+ cypress_process_packet(psmouse, 1);
+ return PSMOUSE_FULL_PACKET;
+ }
+
+#ifdef CYTP_RELATIVE_SUPPORT
+ if (cytp->mode & CYTP_BIT_ABS_MASK)
+#endif
+ {
+ if (index == 0) {
+ if ((packet[0] & 0x08) == 0x08)
+ return PSMOUSE_BAD_DATA;
+
+ contact_cnt = cypress_get_finger_count(packet[0]);
+
+ if (contact_cnt > 5)
+ return PSMOUSE_BAD_DATA;
+
+ if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE) {
+ cypress_set_packet_size(psmouse, 4);
+ if (contact_cnt == 2)
+ cypress_set_packet_size(psmouse, 7);
+ } else {
+ cypress_set_packet_size(psmouse, 5);
+ if (contact_cnt == 2)
+ cypress_set_packet_size(psmouse, 8);
+ }
+ }
+ }
+#ifdef CYTP_RELATIVE_SUPPORT
+ else {
+ if (index == 0) {
+ if ((packet[0] & 0x08) != 0x08)
+ return PSMOUSE_BAD_DATA;
+
+ cypress_set_packet_size(psmouse, 3);
+ if (cytp->mode & CYTP_BIT_CYPRESS_REL)
+ cypress_set_packet_size(psmouse, 5);
+ }
+ }
+#endif
+
+ return PSMOUSE_GOOD_DATA;
+}
+
+static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse)
+{
+ struct cytp_data *cytp = psmouse->private;
+
+ if (psmouse->pktcnt >= cytp->pkt_size) {
+ cypress_process_packet(psmouse, 0);
+ return PSMOUSE_FULL_PACKET;
+ }
+
+ return cypress_validate_byte(psmouse);
+}
+
+static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate)
+{
+ struct cytp_data *cytp = psmouse->private;
+
+ if (rate >= 80) {
+ psmouse->rate = 80;
+ cytp->mode |= CYTP_BIT_HIGH_RATE;
+ } else {
+ psmouse->rate = 40;
+ cytp->mode &= ~CYTP_BIT_HIGH_RATE;
+ }
+
+ ps2_command(&psmouse->ps2dev, (unsigned char *)&psmouse->rate,
+ PSMOUSE_CMD_SETRATE);
+}
+
+static void cypress_disconnect(struct psmouse *psmouse)
+{
+ cypress_reset(psmouse);
+ kfree(psmouse->private);
+ psmouse->private = NULL;
+}
+
+static int cypress_reconnect(struct psmouse *psmouse)
+{
+ int tries = CYTP_PS2_CMD_TRIES;
+ int rc;
+
+ do {
+ cypress_reset(psmouse);
+ rc = cypress_detect(psmouse, false);
+ } while (rc && (--tries > 0));
+
+ if (rc) {
+ psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n");
+ return -1;
+ }
+
+ if (cypress_query_hardware(psmouse)) {
+ psmouse_err(psmouse, "Reconnect: unable to query Trackpad hardware.\n");
+ return -1;
+ }
+
+ if (cypress_set_absolute_mode(psmouse)) {
+ psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int cypress_init(struct psmouse *psmouse)
+{
+ struct cytp_data *cytp;
+
+ cytp = (struct cytp_data *)kzalloc(sizeof(struct cytp_data), GFP_KERNEL);
+ psmouse->private = (void *)cytp;
+ if (cytp == NULL)
+ return -ENOMEM;
+
+ cypress_reset(psmouse);
+
+ if (cypress_query_hardware(psmouse)) {
+ psmouse_err(psmouse, "Unable to query Trackpad hardware.\n");
+ goto err_exit;
+ }
+
+ if (cypress_set_absolute_mode(psmouse)) {
+ psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n");
+ goto err_exit;
+ }
+
+ if (cypress_set_input_params(psmouse->dev, cytp) < 0) {
+ psmouse_err(psmouse, "init: Unable to set input params.\n");
+ goto err_exit;
+ }
+
+ psmouse->model = 1;
+ psmouse->protocol_handler = cypress_protocol_handler;
+ psmouse->set_rate = cypress_set_rate;
+ psmouse->disconnect = cypress_disconnect;
+ psmouse->reconnect = cypress_reconnect;
+ psmouse->cleanup = cypress_reset;
+ psmouse->pktsize = 8;
+ psmouse->resync_time = 0;
+
+ return 0;
+
+err_exit:
+ /*
+ * Reset Cypress Trackpad as a standard mouse. Then
+ * let psmouse driver commmunicating with it as default PS2 mouse.
+ */
+ cypress_reset(psmouse);
+
+ psmouse->private = NULL;
+ kfree(cytp);
+
+ return -1;
+}
+
+bool cypress_supported(void)
+{
+ return true;
+}
diff --git a/drivers/input/mouse/cypress_ps2.h b/drivers/input/mouse/cypress_ps2.h
new file mode 100644
index 0000000..a74f985
--- /dev/null
+++ b/drivers/input/mouse/cypress_ps2.h
@@ -0,0 +1,219 @@
+#ifndef _CYPRESS_PS2_H
+#define _CYPRESS_PS2_H
+
+#include "psmouse.h"
+
+#define CMD_BITS_MASK 0x03
+#define COMPOSIT(x, s) (((x) & CMD_BITS_MASK) << (s))
+
+#define ENCODE_CMD(aa, bb, cc, dd) \
+ (COMPOSIT((aa), 6) | COMPOSIT((bb), 4) | COMPOSIT((cc), 2) | COMPOSIT((dd), 0))
+#define CYTP_CMD_ABS_NO_PRESSURE_MODE ENCODE_CMD(0, 1, 0, 0)
+#define CYTP_CMD_ABS_WITH_PRESSURE_MODE ENCODE_CMD(0, 1, 0, 1)
+#define CYTP_CMD_SMBUS_MODE ENCODE_CMD(0, 1, 1, 0)
+#define CYTP_CMD_STANDARD_MODE ENCODE_CMD(0, 2, 0, 0) /* not implemented yet. */
+#define CYTP_CMD_CYPRESS_REL_MODE ENCODE_CMD(1, 1, 1, 1) /* not implemented yet. */
+#define CYTP_CMD_READ_CYPRESS_ID ENCODE_CMD(0, 0, 0, 0)
+#define CYTP_CMD_READ_VITAL_STATISTICS ENCODE_CMD(0, 0, 0, 1)
+#define CYTP_CMD_SET_HSCROLL_WIDTH(w) ENCODE_CMD(1, 1, 0, (w))
+#define CYTP_CMD_SET_HSCROLL_MASK ENCODE_CMD(1, 1, 0, 0)
+#define CYTP_CMD_SET_VSCROLL_WIDTH(w) ENCODE_CMD(1, 2, 0, (w))
+#define CYTP_CMD_SET_VSCROLL_MASK ENCODE_CMD(1, 2, 0, 0)
+#define CYTP_CMD_SET_PALM_GEOMETRY(e) ENCODE_CMD(1, 2, 1, (e))
+#define CYTP_CMD_PALM_GEMMETRY_MASK ENCODE_CMD(1, 2, 1, 0)
+#define CYTP_CMD_SET_PALM_SENSITIVITY(s) ENCODE_CMD(1, 2, 2, (s))
+#define CYTP_CMD_PALM_SENSITIVITY_MASK ENCODE_CMD(1, 2, 2, 0)
+#define CYTP_CMD_SET_MOUSE_SENSITIVITY(s) ENCODE_CMD(1, 3, ((s) >> 2), (s))
+#define CYTP_CMD_MOUSE_SENSITIVITY_MASK ENCODE_CMD(1, 3, 0, 0)
+#define CYTP_CMD_REQUEST_BASELINE_STATUS ENCODE_CMD(2, 0, 0, 1)
+#define CYTP_CMD_REQUEST_RECALIBRATION ENCODE_CMD(2, 0, 0, 3)
+
+#define DECODE_CMD_AA(x) (((x) >> 6) & CMD_BITS_MASK)
+#define DECODE_CMD_BB(x) (((x) >> 4) & CMD_BITS_MASK)
+#define DECODE_CMD_CC(x) (((x) >> 2) & CMD_BITS_MASK)
+#define DECODE_CMD_DD(x) ((x) & CMD_BITS_MASK)
+
+/* Cypress trackpad working mode. */
+#define CYTP_BIT_ABS_PRESSURE (1 << 3)
+#define CYTP_BIT_ABS_NO_PRESSURE (1 << 2)
+#define CYTP_BIT_CYPRESS_REL (1 << 1)
+#define CYTP_BIT_STANDARD_REL (1 << 0)
+#define CYTP_BIT_REL_MASK (CYTP_BIT_CYPRESS_REL | CYTP_BIT_STANDARD_REL)
+#define CYTP_BIT_ABS_MASK (CYTP_BIT_ABS_PRESSURE | CYTP_BIT_ABS_NO_PRESSURE)
+#define CYTP_BIT_ABS_REL_MASK (CYTP_BIT_ABS_MASK | CYTP_BIT_REL_MASK)
+
+#define CYTP_BIT_HIGH_RATE (1 << 4)
+/*
+ * report mode bit is set, firmware working in Remote Mode.
+ * report mode bit is cleared, firmware working in Stream Mode.
+ */
+#define CYTP_BIT_REPORT_MODE (1 << 5)
+
+/* scrolling width values for set HSCROLL and VSCROLL width command. */
+#define SCROLL_WIDTH_NARROW 1
+#define SCROLL_WIDTH_NORMAL 2
+#define SCROLL_WIDTH_WIDE 3
+
+#define PALM_GEOMETRY_ENABLE 1
+#define PALM_GEOMETRY_DISABLE 0
+
+#define CYPRESS_KEY_1 0x33
+#define CYPRESS_KEY_2 0xCC
+
+#define VITAL_STATICS_MASK 0x80
+#define FW_VERSION_MASX 0x7f
+#define FW_VER_HIGH_MASK 0x70
+#define FW_VER_LOW_MASK 0x0f
+
+/* Times to retry a ps2_command and millisecond delay between tries. */
+#define CYTP_PS2_CMD_TRIES 3
+#define CYTP_PS2_CMD_DELAY 500
+
+/* time out for PS/2 command only in milliseconds. */
+#define CYTP_CMD_TIMEOUT 200
+#define CYTP_DATA_TIMEOUT 30
+
+#define CYTP_EXT_CMD 0xe8
+#define CYTP_PS2_RETRY 0xfe
+#define CYTP_PS2_ERROR 0xfc
+
+#define CYTP_RESP_RETRY 0x01
+#define CYTP_RESP_ERROR 0xfe
+
+
+#define CYTP_105001_WIDTH 97 /* Dell XPS 13 */
+#define CYTP_105001_HIGH 59
+#define CYTP_DEFAULT_WIDTH (CYTP_105001_WIDTH)
+#define CYTP_DEFAULT_HIGH (CYTP_105001_HIGH)
+
+#define CYTP_ABS_MAX_X 1600
+#define CYTP_ABS_MAX_Y 900
+#define CYTP_MAX_PRESSURE 255
+#define CYTP_MIN_PRESSURE 0
+
+/* header byte bits of relative package. */
+#define BTN_LEFT_BIT 0x01
+#define BTN_RIGHT_BIT 0x02
+#define BTN_MIDDLE_BIT 0x04
+#define REL_X_SIGN_BIT 0x10
+#define REL_Y_SIGN_BIT 0x20
+
+/* header byte bits of absolute package. */
+#define ABS_VSCROLL_BIT 0x10
+#define ABS_HSCROLL_BIT 0x20
+#define ABS_MULTIFINGER_TAP 0x04
+#define ABS_EDGE_MOTION_MASK 0x80
+
+#define DFLT_RESP_BITS_VALID 0x88 /* SMBus bit should not be set. */
+#define DFLT_RESP_SMBUS_BIT 0x80
+#define DFLT_SMBUS_MODE 0x80
+#define DFLT_PS2_MODE 0x00
+#define DFLT_RESP_BIT_MODE 0x40
+#define DFLT_RESP_REMOTE_MODE 0x40
+#define DFLT_RESP_STREAM_MODE 0x00
+#define DFLT_RESP_BIT_REPORTING 0x20
+#define DFLT_RESP_BIT_SCALING 0x10
+
+#define VITAL_BIT_PALM 0x80
+#define VITAL_BIT_STUBBORN 0x40
+#define VITAL_BIT_2F_JITTER 0x30
+#define VITAL_BIT_1F_JITTER 0x0c
+#define VITAL_BIT_APA 0x02
+#define VITAL_BIT_MTG 0x01
+#define VITAL_BIT_ABS_PKT_FORMAT_SET 0xf0
+#define VITAL_BIT_2F_SPIKE 0x0c
+#define VITAL_BIT_1F_SPIKE 0x03
+
+/* bits of first byte response of E9h-Status Request command. */
+#define RESP_BTN_RIGHT_BIT 0x01
+#define RESP_BTN_MIDDLE_BIT 0x02
+#define RESP_BTN_LEFT_BIT 0x04
+#define RESP_SCALING_BIT 0x10
+#define RESP_ENABLE_BIT 0x20
+#define RESP_REMOTE_BIT 0x40
+#define RESP_SMBUS_BIT 0x80
+
+#define CYTP_MAX_CONTACTS 2
+#define CYTP_MAX_MT_SLOTS 2
+
+enum cytp_type {
+ CYTP_STG,
+ CYTP_MTG,
+ CYTP_APA,
+};
+
+struct cytp_contact {
+ int x;
+ int y;
+ int z; /* also named as touch pressure. */
+};
+
+/* The structure of Cypress Trackpad event data. */
+struct cytp_report_data {
+ int contact_cnt;
+ struct cytp_contact contacts[CYTP_MAX_CONTACTS];
+ unsigned int left:1;
+ unsigned int right:1;
+ unsigned int middle:1;
+ unsigned int tap:1; /* multi-finger tap detected. */
+ signed char vscroll;
+ signed char hscroll;
+};
+
+/* The structure of Cypress Trackpad device private data. */
+struct cytp_data {
+ int fw_version;
+
+ int pkt_size;
+ int mode;
+
+ int scaling;
+ int reporting;
+
+ int tp_min_pressure;
+ int tp_max_pressure;
+ int tp_width; /* X direction physical size in mm. */
+ int tp_high; /* Y direction physical size in mm. */
+ int tp_max_abs_x; /* Max X absolute units that can be reported. */
+ int tp_max_abs_y; /* Max Y absolute units that can be reported. */
+
+ int tp_res_x; /* X resolution in units/mm. */
+ int tp_res_y; /* Y resolution in units/mm. */
+
+ enum cytp_type tp_type;
+ unsigned char tp_palm;
+ unsigned char tp_stubborn;
+ unsigned char tp_2f_jitter;
+ unsigned char tp_1f_jitter;
+ unsigned char tp_abs_packet_format_set;
+ unsigned char tp_2f_spike;
+ unsigned char tp_1f_spike;
+
+ int vital_statics_supported;
+
+ int prev_contact_cnt;
+ int zero_packet_cnt;
+ struct cytp_report_data prev_report_data;
+};
+
+
+#ifdef CONFIG_MOUSE_PS2_CYPRESS
+int cypress_detect(struct psmouse *psmouse, bool set_properties);
+int cypress_init(struct psmouse *psmouse);
+bool cypress_supported(void);
+#else
+inline int cypress_detect(struct psmouse *psmouse, bool set_properties)
+{
+ return -ENOSYS;
+}
+inline int cypress_init(struct psmouse *psmouse)
+{
+ return -ENOSYS;
+}
+inline bool cypress_supported(void)
+{
+ return 0;
+}
+#endif /* CONFIG_MOUSE_PS2_CYPRESS */
+
+#endif /* _CYPRESS_PS2_H */
--
1.7.10.4
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