RE: [PATCH v6] Cypress PS/2 Trackpad driver

From: Dudley Du
Date: Sun Dec 09 2012 - 21:44:43 EST

Hi Kamal,

I think in default branch in cypress_get_finger_count() function return 0 is not suitable,
We should return a value bigger than 5 to indicate invalid package to avoid unable to distinguish really 0 contact_cnt packages.
0 contact_cnt packages may still have valid left/right mechanical button events data, so cannot be mixed together.
otherwise cypress_validate_byte() function cannot filter out invalid package data.
Could you help double check with it,
Thanks.

> > This driver, submitted on behalf of Cypress Semiconductor Corporation
> > and additional contributors, provides support for the Cypress PS/2 Trackpad.
> >
> > Note that the patch "increase struct ps2dev cmdbuf[] to 8 bytes" [5]
> > is a PREREQUISITE for this patch.
> >
> > This [PATCH v6] version differs from my previous submitted version[4]:
> >
> > Changes as recommended by Dmitry Torokhov:
> >
> > - patches #2 (main driver) and #3 (link in driver) have been merged.
> > - eliminated cytp_dbg(), is_cypress_key(), and cypress_set_abs_rel_mode().
> > - restructured cypress_validate_byte() and cypress_reset().
> > - stopped unnecessary fiddling with psmouse->pktsize.
> > - fixed cypress_read_cmd_status() printf.
> > - removed unused members from struct cytp_data.
> > - misc code and comment style cleanups.
> >
> > Known problems: None.
> >
> > -Kamal Mostafa <kamal@xxxxxxxxxxxxx>
> >
> > [0] PATCH v1: http://www.spinics.net/lists/linux-input/msg23690.html
> > [1] PATCH v2: http://www.spinics.net/lists/linux-input/msg23718.html
> > [2] PATCH v3: http://www.spinics.net/lists/linux-input/msg23943.html
> > [3] PATCH v4: http://www.spinics.net/lists/linux-input/msg24047.html
> > [4] PATCH v5: http://www.spinics.net/lists/linux-input/msg24096.html
> > [5] cmdbuf patch:
> > http://www.spinics.net/lists/linux-input/msg24095.html
> >
> > -- >8 --
> > From: Dudley Du <dudl@xxxxxxxxxxx>
> > Subject: [PATCH v6] input: Cypress PS/2 Trackpad psmouse driver
> >
> > 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/Kconfig | 10 +
> > drivers/input/mouse/Makefile | 1 +
> > drivers/input/mouse/cypress_ps2.c | 719
> > ++++++++++++++++++++++++++++++++++++
> > drivers/input/mouse/cypress_ps2.h | 191 ++++++++++
> > drivers/input/mouse/psmouse-base.c | 32 ++
> > drivers/input/mouse/psmouse.h | 1 +
> > 6 files changed, 954 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/Kconfig b/drivers/input/mouse/Kconfig
> > index cd6268c..88954dd 100644
> > --- a/drivers/input/mouse/Kconfig
> > +++ b/drivers/input/mouse/Kconfig
> > @@ -68,6 +68,16 @@ config MOUSE_PS2_SYNAPTICS
> >
> > If unsure, say Y.
> >
> > +config MOUSE_PS2_CYPRESS
> > + bool "Cypress PS/2 mouse protocol extension" if EXPERT
>
> Why EXPERT here?
>
> > + default y
>
> Should it really be default y here?
>
> > + depends on MOUSE_PS2
> > + help
> > + Say Y here if you have a Cypress PS/2 Trackpad connected to
> > + your system.
> > +
> > + If unsure, say Y.
> > +
> > config MOUSE_PS2_LIFEBOOK
> > bool "Fujitsu Lifebook PS/2 mouse protocol extension" if EXPERT
> > default y
> > diff --git a/drivers/input/mouse/Makefile
> > b/drivers/input/mouse/Makefile index 46ba755..323e352 100644
> > --- a/drivers/input/mouse/Makefile
> > +++ b/drivers/input/mouse/Makefile
> > @@ -32,3 +32,4 @@ psmouse-$(CONFIG_MOUSE_PS2_LIFEBOOK) += lifebook.o
> > psmouse-$(CONFIG_MOUSE_PS2_SENTELIC) += sentelic.o
> > psmouse-$(CONFIG_MOUSE_PS2_TRACKPOINT) += trackpoint.o
> > psmouse-$(CONFIG_MOUSE_PS2_TOUCHKIT) += touchkit_ps2.o
> > +psmouse-$(CONFIG_MOUSE_PS2_CYPRESS) += cypress_ps2.o
> > diff --git a/drivers/input/mouse/cypress_ps2.c
> > b/drivers/input/mouse/cypress_ps2.c
> > new file mode 100644
> > index 0000000..310cb49
> > --- /dev/null
> > +++ b/drivers/input/mouse/cypress_ps2.c
> > @@ -0,0 +1,719 @@
> > +/*
> > + * 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 */
> > +
> > +static void cypress_set_packet_size(struct psmouse *psmouse, unsigned
> > +int n) {
> > + struct cytp_data *cytp = psmouse->private;
> > + cytp->pkt_size = n;
> > +}
> > +
> > +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) {
> > + psmouse_dbg(psmouse,
> > + "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;
> > + }
> > +
> > +#ifdef CYTP_DEBUG_VERBOSE
> > + psmouse_dbg(psmouse, "send command 0x%02x success, resp 0xfa\n",
> > + value & 0xff);
> > +#endif
> > +
> > + 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 byte (0xE8 or 0xF3).
> > + * If sending the command fails, send recovery command
> > + * to make the device return to the ready state.
> > + */
> > + 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 rc;
> > + struct ps2dev *ps2dev = &psmouse->ps2dev;
> > + enum psmouse_state old_state;
> > + int pktsize;
> > +
> > + ps2_begin_command(&psmouse->ps2dev);
> > +
> > + old_state = psmouse->state;
> > + psmouse->state = PSMOUSE_CMD_MODE;
> > + psmouse->pktcnt = 0;
> > +
> > + pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3;
> > + memset(param, 0, pktsize);
> > +
> > + rc = cypress_ps2_sendbyte(psmouse, 0xe9);
> > + if (rc < 0)
> > + goto out;
> > +
> > + wait_event_timeout(ps2dev->wait,
> > + (psmouse->pktcnt >= pktsize),
> > + msecs_to_jiffies(CYTP_CMD_TIMEOUT));
> > +
> > + memcpy(param, psmouse->packet, pktsize);
> > +
> > + psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n",
> > + cmd, pktsize, param);
> > +
> > +out:
> > + psmouse->state = old_state;
> > + psmouse->pktcnt = 0;
> > +
> > + 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_TP_METRICS)
> > + 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;
> > + }
> > +
> > + psmouse_dbg(psmouse, "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;
> > +
> > + psmouse_dbg(psmouse, "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 -ENODEV;
> > +
> > + /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
> > + if (param[0] != 0x33 || param[1] != 0xCC)
> > + 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 -ENODEV;
> > +
> > + /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */
> > + if (param[0] != 0x33 || param[1] != 0xCC)
> > + return -ENODEV;
> > +
> > + cytp->fw_version = param[2] & FW_VERSION_MASX;
> > + cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0;
> > +
> > + psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version);
> > + psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n",
> > + cytp->tp_metrics_supported);
> > + return 0;
> > +}
> > +
> > +static int cypress_read_tp_metrics(struct psmouse *psmouse) {
> > + struct cytp_data *cytp = psmouse->private;
> > + unsigned char param[8];
> > +
> > + /* set default values for tp metrics. */
> > + 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_TP_METRICS, 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 (!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
> > + psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n");
> > + psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width);
> > + psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high);
> > + psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x);
> > + psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y);
> > + psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure);
> > + psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure);
> > + psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x);
> > + psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y);
> > +
> > + psmouse_dbg(psmouse, "tp_type_APA = %d\n",
> > + (param[6] & TP_METRICS_BIT_APA) ? 1 : 0);
> > + psmouse_dbg(psmouse, "tp_type_MTG = %d\n",
> > + (param[6] & TP_METRICS_BIT_MTG) ? 1 : 0);
> > + psmouse_dbg(psmouse, "tp_palm = %d\n",
> > + (param[6] & TP_METRICS_BIT_PALM) ? 1 : 0);
> > + psmouse_dbg(psmouse, "tp_stubborn = %d\n",
> > + (param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0);
> > + psmouse_dbg(psmouse, "tp_1f_jitter = %d\n",
> > + (param[6] & TP_METRICS_BIT_1F_JITTER) >> 2);
> > + psmouse_dbg(psmouse, "tp_2f_jitter = %d\n",
> > + (param[6] & TP_METRICS_BIT_2F_JITTER) >> 4);
> > + psmouse_dbg(psmouse, "tp_1f_spike = %d\n",
> > + param[7] & TP_METRICS_BIT_1F_SPIKE);
> > + psmouse_dbg(psmouse, "tp_2f_spike = %d\n",
> > + (param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2);
> > + psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n",
> > + (param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4); #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->tp_metrics_supported) {
> > + ret = cypress_read_tp_metrics(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;
> > +
> > + cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK)
> > + | CYTP_BIT_ABS_PRESSURE;
> > + cypress_set_packet_size(psmouse, 5);
> > +
> > + return 0;
> > +}
> > +
> > +/*
> > + * Reset trackpad device.
> > + * This is also the default mode when trackpad powered on.
> > + */
> > +static void cypress_reset(struct psmouse *psmouse) {
> > + struct cytp_data *cytp = psmouse->private;
> > +
> > + cytp->mode = 0;
> > +
> > + psmouse_reset(psmouse);
> > +}
> > +
> > +static int cypress_set_input_params(struct input_dev *input,
> > + struct cytp_data *cytp)
> > +{
> > + int ret;
> > +
> > + if (!cytp->tp_res_x || !cytp->tp_res_y)
> > + return -EINVAL;
> > +
> > + __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);
> > +
> > + 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);
> > +
> > + __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) {
> > + /* HSCROLL gets added on to 0 finger count. */
> > + switch (finger_count) {
> > + case 0: return(4);
>
> No parenthesis on return.
>
> > + case 2: return(5);
> > + default:
> > + /* Invalid contact (e.g. palm). Ignore it. */
> > + return(0);

I suggest to return 6 (bigger than 5) to indicate invalid header byte value detected.

> > + }
> > + }
> > +
> > + 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));
> > +
> > + report_data->contact_cnt = cypress_get_finger_count(header_byte);
> > +
> > + if (report_data->contact_cnt == 0) /* e.g. palm detect */
> > + return 0;

Depending on my suggestion, should add contact_cnt > 5 check here, and equal to 0 checking should be removed.

When invalid contact_cnt is checked, we can ignore these data.
But for though really contact_cnt value is 0 packages, we should still go on to process it, cannot return immediately,
Because 0 contact_cnt package still can report left/right mechanical button events.

if (report_data->contact_cnt > 5) {
report_data->contact_cnt = 0;
return 0;
}


> > + report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0;
> > +
> > + 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];
> > +
> > + } 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;
> > +
> > + /*
> > + * 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;
> > +
> > +#ifdef CYTP_DEBUG_VERBOSE
> > + {
> > + int i;
> > + int n = report_data->contact_cnt;
> > + psmouse_dbg(psmouse, "Dump parsed report data as below:\n");
> > + psmouse_dbg(psmouse, "contact_cnt = %d\n",
> > + report_data->contact_cnt);
> > + if (n > CYTP_MAX_MT_SLOTS)
> > + n = CYTP_MAX_MT_SLOTS;
> > + for (i = 0; i < n; i++)
> > + psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i,
> > + report_data->contacts[i].x,
> > + report_data->contacts[i].y,
> > + report_data->contacts[i].z);
> > + psmouse_dbg(psmouse, "left = %d\n", report_data->left);
> > + psmouse_dbg(psmouse, "right = %d\n", report_data->right);
> > + psmouse_dbg(psmouse, "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;
> > + struct input_mt_pos pos[CYTP_MAX_MT_SLOTS];
> > + int slots[CYTP_MAX_MT_SLOTS];
> > + int n;
> > +
> > + if (cypress_parse_packet(psmouse, cytp, &report_data))
> > + return;
> > +
> > + 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);
> > +
> > + 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;
> > + }
> > +
> > + /*
> > + * Perform validation (and adjust packet size) based only on the
> > + * first byte; allow all further bytes through.
> > + */
> > + if (index != 0)
> > + return PSMOUSE_GOOD_DATA;
> > +
> > + /*
> > + * If absolute/relative mode bit has not been set yet, just pass
> > + * the byte through.
> > + */
> > + if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0)
> > + return PSMOUSE_GOOD_DATA;
> > +
> > + 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, contact_cnt == 2 ? 7 : 4);
> > + else
> > + cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5);
> > +
> > + 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_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);
> > +
> > + psmouse->pktsize = 8;
> > +
> > + 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->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..4720f21
> > --- /dev/null
> > +++ b/drivers/input/mouse/cypress_ps2.h
> > @@ -0,0 +1,191 @@
> > +#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_TP_METRICS 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 TP_METRICS_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 TP_METRICS_BIT_PALM 0x80
> > +#define TP_METRICS_BIT_STUBBORN 0x40
> > +#define TP_METRICS_BIT_2F_JITTER 0x30
> > +#define TP_METRICS_BIT_1F_JITTER 0x0c
> > +#define TP_METRICS_BIT_APA 0x02
> > +#define TP_METRICS_BIT_MTG 0x01
> > +#define TP_METRICS_BIT_ABS_PKT_FORMAT_SET 0xf0
> > +#define TP_METRICS_BIT_2F_SPIKE 0x0c
> > +#define TP_METRICS_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_MT_SLOTS 2
> > +
> > +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_MT_SLOTS];
> > + unsigned int left:1;
> > + unsigned int right:1;
> > + unsigned int middle:1;
> > + unsigned int tap:1; /* multi-finger tap detected. */ };
> > +
> > +/* The structure of Cypress Trackpad device private data. */ struct
> > +cytp_data {
> > + int fw_version;
> > +
> > + int pkt_size;
> > + int mode;
> > +
> > + 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. */
> > +
> > + int tp_metrics_supported;
> > +};
> > +
> > +
> > +#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 */
> > diff --git a/drivers/input/mouse/psmouse-base.c
> > b/drivers/input/mouse/psmouse-base.c
> > index 22fe254..cff065f 100644
> > --- a/drivers/input/mouse/psmouse-base.c
> > +++ b/drivers/input/mouse/psmouse-base.c
> > @@ -34,6 +34,7 @@
> > #include "touchkit_ps2.h"
> > #include "elantech.h"
> > #include "sentelic.h"
> > +#include "cypress_ps2.h"
> >
> > #define DRIVER_DESC "PS/2 mouse driver"
> >
> > @@ -759,6 +760,28 @@ static int psmouse_extensions(struct psmouse *psmouse,
> > }
> >
> > /*
> > + * Try Cypress Trackpad.
> > + * Must try it before Finger Sensing Pad because Finger Sensing Pad
> > +probe
> > + * upsets some modules of Cypress Trackpads.
> > + */
> > + if (max_proto > PSMOUSE_IMEX &&
> > + cypress_detect(psmouse, set_properties) == 0) {
> > + if (cypress_supported()) {
> > + if (cypress_init(psmouse) == 0)
> > + return PSMOUSE_CYPRESS;
> > +
> > + /*
> > + * Finger Sensing Pad probe upsets some modules of
> > + * Cypress Trackpad, must avoid Finger Sensing Pad
> > + * probe if Cypress Trackpad device detected.
> > + */
> > + return PSMOUSE_PS2;
> > + }
> > +
> > + max_proto = PSMOUSE_IMEX;
> > + }
> > +
> > +/*
> > * Try ALPS TouchPad
> > */
> > if (max_proto > PSMOUSE_IMEX) {
> > @@ -896,6 +919,15 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> > .alias = "thinkps",
> > .detect = thinking_detect,
> > },
> > +#ifdef CONFIG_MOUSE_PS2_CYPRESS
> > + {
> > + .type = PSMOUSE_CYPRESS,
> > + .name = "CyPS/2",
> > + .alias = "cypress",
> > + .detect = cypress_detect,
> > + .init = cypress_init,
> > + },
> > +#endif
> > {
> > .type = PSMOUSE_GENPS,
> > .name = "GenPS/2",
> > diff --git a/drivers/input/mouse/psmouse.h
> > b/drivers/input/mouse/psmouse.h index fe1df23..2f0b39d 100644
> > --- a/drivers/input/mouse/psmouse.h
> > +++ b/drivers/input/mouse/psmouse.h
> > @@ -95,6 +95,7 @@ enum psmouse_type {
> > PSMOUSE_ELANTECH,
> > PSMOUSE_FSP,
> > PSMOUSE_SYNAPTICS_RELATIVE,
> > + PSMOUSE_CYPRESS,
> > PSMOUSE_AUTO /* This one should always be last */
> > };
> >
> > --
> > 1.7.10.4
> >

Reviewed-by: Dudley Du <dudl@xxxxxxxxxxx>

Thanks,
Dudley Du

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