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Input: elantech - report the middle button of the touchpad 

In the past, no elantech was known with 3 touchpad mouse buttons.
Fujitsu H730 is the first known elantech with a middle button. This commit
enables this middle button. For backwards compatibility, the Fujitsu is
detected via DMI, and only for this one 3 buttons will be announced.

Reported-by: Stefan Valouch <stefan@valouch.com>
Signed-off-by: Ulrik De Bie <ulrik.debie-os@e2big.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Ulrik De Bie 2014-11-13 17:45:12 -08:00 committed by Dmitry Torokhov
parent a7ef82aee9
commit f386474e12
1 changed files with 19 additions and 0 deletions
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19
drivers/input/mouse/elantech.c
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@ -563,6 +563,7 @@ static void elantech_input_sync_v4(struct psmouse *psmouse)
} else {
input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
input_report_key(dev, BTN_MIDDLE, packet[0] & 0x04);
}
input_mt_report_pointer_emulation(dev, true);
@ -1131,6 +1132,22 @@ static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
}
}
/*
* Some hw_version 4 models do have a middle button
*/
static const struct dmi_system_id elantech_dmi_has_middle_button[] = {
#if defined(CONFIG_DMI) && defined(CONFIG_X86)
{
/* Fujitsu H730 has a middle button */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),
},
},
#endif
{ }
};
/*
* Set the appropriate event bits for the input subsystem
*/
@ -1150,6 +1167,8 @@ 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))
__set_bit(BTN_MIDDLE, dev->keybit);
__set_bit(BTN_RIGHT, dev->keybit);
__set_bit(BTN_TOUCH, dev->keybit);