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Commit fd1cf11f authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Dmitry Torokhov
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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: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 88463497

drivers/input/mouse/elantech.c

+6 −12
Original line number Diff line number Diff line
@@ -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;

}

drivers/input/mouse/elantech.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

};