Commit fd7097db authored by Ulrik De Bie's avatar Ulrik De Bie Committed by Luis Henriques

Input: elantech - fix absolute mode setting on some ASUS laptops

commit bd884149 upstream.

On ASUS TP500LN and X750JN, the touchpad absolute mode is reset each
time set_rate is done.

In order to fix this, we will verify the firmware version, and if it
matches the one in those laptops, the set_rate function is overloaded
with a function elantech_set_rate_restore_reg_07 that performs the
set_rate with the original function, followed by a restore of reg_07
(the register that sets the absolute mode on elantech v4 hardware).

Also the ASUS TP500LN and X750JN firmware version, capabilities, and
button constellation is added to elantech.c
Reported-and-tested-by: default avatarGeorge Moutsopoulos <gmoutso@yahoo.co.uk>
Signed-off-by: default avatarUlrik De Bie <ulrik.debie-os@e2big.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent 42244864
...@@ -813,6 +813,21 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) ...@@ -813,6 +813,21 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
return PSMOUSE_FULL_PACKET; return PSMOUSE_FULL_PACKET;
} }
/*
* This writes the reg_07 value again to the hardware at the end of every
* set_rate call because the register loses its value. reg_07 allows setting
* absolute mode on v4 hardware
*/
static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse,
unsigned int rate)
{
struct elantech_data *etd = psmouse->private;
etd->original_set_rate(psmouse, rate);
if (elantech_write_reg(psmouse, 0x07, etd->reg_07))
psmouse_err(psmouse, "restoring reg_07 failed\n");
}
/* /*
* Put the touchpad into absolute mode * Put the touchpad into absolute mode
*/ */
...@@ -1015,6 +1030,8 @@ static int elantech_get_resolution_v4(struct psmouse *psmouse, ...@@ -1015,6 +1030,8 @@ static int elantech_get_resolution_v4(struct psmouse *psmouse,
* Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons
* Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons
* Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons
* Asus TP500LN 0x381f17 10, 14, 0e clickpad
* Asus X750JN 0x381f17 10, 14, 0e clickpad
* Asus UX31 0x361f00 20, 15, 0e clickpad * Asus UX31 0x361f00 20, 15, 0e clickpad
* Asus UX32VD 0x361f02 00, 15, 0e clickpad * Asus UX32VD 0x361f02 00, 15, 0e clickpad
* Avatar AVIU-145A2 0x361f00 ? clickpad * Avatar AVIU-145A2 0x361f00 ? clickpad
...@@ -1493,6 +1510,11 @@ int elantech_init(struct psmouse *psmouse) ...@@ -1493,6 +1510,11 @@ int elantech_init(struct psmouse *psmouse)
goto init_fail; goto init_fail;
} }
if (etd->fw_version == 0x381f17) {
etd->original_set_rate = psmouse->set_rate;
psmouse->set_rate = elantech_set_rate_restore_reg_07;
}
if (elantech_set_input_params(psmouse)) { if (elantech_set_input_params(psmouse)) {
psmouse_err(psmouse, "failed to query touchpad range.\n"); psmouse_err(psmouse, "failed to query touchpad range.\n");
goto init_fail; goto init_fail;
......
...@@ -139,6 +139,7 @@ struct elantech_data { ...@@ -139,6 +139,7 @@ struct elantech_data {
struct finger_pos mt[ETP_MAX_FINGERS]; struct finger_pos mt[ETP_MAX_FINGERS];
unsigned char parity[256]; unsigned char parity[256];
int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param); int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param);
void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate);
}; };
#ifdef CONFIG_MOUSE_PS2_ELANTECH #ifdef CONFIG_MOUSE_PS2_ELANTECH
......
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