From 3ace3686f198e656624d7ca2984d053e65f6e09d Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Fri, 12 Sep 2014 17:24:47 -0700 Subject: Input: psmouse - add support for detecting FocalTech PS/2 touchpads The Asus X450 and X550 laptops use a PS/2 touchpad from a new manufacturer called FocalTech: https://bugzilla.kernel.org/show_bug.cgi?id=77391 https://bugzilla.redhat.com/show_bug.cgi?id=1110011 The protocol for these devices is not known at this time, but even without knowing the protocol they need some special handling. They get upset by some of our other PS/2 device probing, and once upset generate random mouse events making things unusable even with an external mouse. This patch adds detection of these devices based on their pnp ids, and when they are detected, treats them as a bare ps/2 mouse. Doing things this way they at least work in their ps/2 mouse emulation mode. Signed-off-by: Hans de Goede Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/Makefile | 2 +- drivers/input/mouse/focaltech.c | 52 ++++++++++++++++++++++++++++++++++++++ drivers/input/mouse/focaltech.h | 22 ++++++++++++++++ drivers/input/mouse/psmouse-base.c | 16 ++++++++++++ 4 files changed, 91 insertions(+), 1 deletion(-) create mode 100644 drivers/input/mouse/focaltech.c create mode 100644 drivers/input/mouse/focaltech.h (limited to 'drivers/input/mouse') diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile index c25efdb..dda507f 100644 --- a/drivers/input/mouse/Makefile +++ b/drivers/input/mouse/Makefile @@ -23,7 +23,7 @@ obj-$(CONFIG_MOUSE_SYNAPTICS_I2C) += synaptics_i2c.o obj-$(CONFIG_MOUSE_SYNAPTICS_USB) += synaptics_usb.o obj-$(CONFIG_MOUSE_VSXXXAA) += vsxxxaa.o -psmouse-objs := psmouse-base.o synaptics.o +psmouse-objs := psmouse-base.o synaptics.o focaltech.o psmouse-$(CONFIG_MOUSE_PS2_ALPS) += alps.o psmouse-$(CONFIG_MOUSE_PS2_ELANTECH) += elantech.o diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c new file mode 100644 index 0000000..f4d657e --- /dev/null +++ b/drivers/input/mouse/focaltech.c @@ -0,0 +1,52 @@ +/* + * Focaltech TouchPad PS/2 mouse driver + * + * Copyright (c) 2014 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Red Hat authors: + * + * Hans de Goede + */ + +/* + * The Focaltech PS/2 touchpad protocol is unknown. This drivers deals with + * detection only, to avoid further detection attempts confusing the touchpad + * this way it at least works in PS/2 mouse compatibility mode. + */ + +#include +#include +#include "psmouse.h" + +static const char * const focaltech_pnp_ids[] = { + "FLT0101", + "FLT0102", + "FLT0103", + NULL +}; + +int focaltech_detect(struct psmouse *psmouse, bool set_properties) +{ + if (!psmouse_matches_pnp_id(psmouse, focaltech_pnp_ids)) + return -ENODEV; + + if (set_properties) { + psmouse->vendor = "FocalTech"; + psmouse->name = "FocalTech Touchpad in mouse emulation mode"; + } + + return 0; +} + +int focaltech_init(struct psmouse *psmouse) +{ + ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); + psmouse_reset(psmouse); + + return 0; +} diff --git a/drivers/input/mouse/focaltech.h b/drivers/input/mouse/focaltech.h new file mode 100644 index 0000000..498650c --- /dev/null +++ b/drivers/input/mouse/focaltech.h @@ -0,0 +1,22 @@ +/* + * Focaltech TouchPad PS/2 mouse driver + * + * Copyright (c) 2014 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Red Hat authors: + * + * Hans de Goede + */ + +#ifndef _FOCALTECH_H +#define _FOCALTECH_H + +int focaltech_detect(struct psmouse *psmouse, bool set_properties); +int focaltech_init(struct psmouse *psmouse); + +#endif diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c index bc1bc26..3ab941d 100644 --- a/drivers/input/mouse/psmouse-base.c +++ b/drivers/input/mouse/psmouse-base.c @@ -35,6 +35,7 @@ #include "elantech.h" #include "sentelic.h" #include "cypress_ps2.h" +#include "focaltech.h" #define DRIVER_DESC "PS/2 mouse driver" @@ -720,6 +721,21 @@ static int psmouse_extensions(struct psmouse *psmouse, { bool synaptics_hardware = false; +/* Always check for focaltech, this is safe as it uses pnp-id matching */ + if (psmouse_do_detect(focaltech_detect, psmouse, set_properties) == 0) { + if (!set_properties || focaltech_init(psmouse) == 0) { + /* + * Not supported yet, use bare protocol. + * Note that we need to also restrict + * psmouse_max_proto so that psmouse_initialize() + * does not try to reset rate and resolution, + * because even that upsets the device. + */ + psmouse_max_proto = PSMOUSE_PS2; + return PSMOUSE_PS2; + } + } + /* * We always check for lifebook because it does not disturb mouse * (it only checks DMI information). -- cgit v1.1