From fd1cf11f7130977d44fc19bf7ced63a4b6f1fc30 Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Mon, 27 May 2019 18:33:33 -0700 Subject: Input: elantech - detect middle button based on firmware version Looks like the new generation of Lenovo machine also need to be added to the PnPID whitelist. This is definitively not going to scale, as there is nothing that tells us currently if a touchpad supports a true physical middle button. Consider that all new touchpads that are not clickpads (so matching ETP_NEW_IC_SMBUS_HOST_NOTIFY) are handling 3 physical buttons. Signed-off-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/elantech.c | 18 ++++++------------ drivers/input/mouse/elantech.h | 1 + 2 files changed, 7 insertions(+), 12 deletions(-) (limited to 'drivers/input/mouse') diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index d2829dc5999c..057a3cf01eec 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1107,16 +1107,6 @@ static const struct dmi_system_id elantech_dmi_has_middle_button[] = { { } }; -static const char * const middle_button_pnp_ids[] = { - "LEN2131", /* ThinkPad P52 w/ NFC */ - "LEN2132", /* ThinkPad P52 */ - "LEN2133", /* ThinkPad P72 w/ NFC */ - "LEN2134", /* ThinkPad P72 */ - "LEN0407", - "LEN0408", - NULL -}; - /* * Set the appropriate event bits for the input subsystem */ @@ -1135,8 +1125,7 @@ static int elantech_set_input_params(struct psmouse *psmouse) __clear_bit(EV_REL, dev->evbit); __set_bit(BTN_LEFT, dev->keybit); - if (dmi_check_system(elantech_dmi_has_middle_button) || - psmouse_matches_pnp_id(psmouse, middle_button_pnp_ids)) + if (info->has_middle_button) __set_bit(BTN_MIDDLE, dev->keybit); __set_bit(BTN_RIGHT, dev->keybit); @@ -1750,6 +1739,11 @@ static int elantech_query_info(struct psmouse *psmouse, break; } + /* check for the middle button: DMI matching or new v4 firmwares */ + info->has_middle_button = dmi_check_system(elantech_dmi_has_middle_button) || + (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version) && + !elantech_is_buttonpad(info)); + return 0; } diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h index 194503ed59c5..16174b54ffc3 100644 --- a/drivers/input/mouse/elantech.h +++ b/drivers/input/mouse/elantech.h @@ -158,6 +158,7 @@ struct elantech_device_info { bool crc_enabled; bool set_hw_resolution; bool has_trackpoint; + bool has_middle_button; int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param); }; -- cgit v1.2.3