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Input: elantech - add special check for fw_version 0x470f01 touchpad

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It is no need to check the packet[0] for sanity check when doing
elantech_packet_check_v4() function for fw_version = 0x470f01 touchpad.

Signed-off by: Duson Lin <dusonlin@emc.com.tw>
Reviewed-by: Ulrik De Bie <ulrik.debie-os@e2big.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Duson Lin 2015-08-07 14:37:24 -07:00 committed by Dmitry Torokhov
parent e661d0a044
commit 6b30c73e9f
2 changed files with 21 additions and 2 deletions
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22
drivers/input/mouse/elantech.c
View File

@ -783,19 +783,26 @@ static int elantech_packet_check_v4(struct psmouse *psmouse)
struct elantech_data *etd = psmouse->private;
unsigned char *packet = psmouse->packet;
unsigned char packet_type = packet[3] & 0x03;
unsigned int ic_version;
bool sanity_check;
if (etd->tp_dev && (packet[3] & 0x0f) == 0x06)
return PACKET_TRACKPOINT;
/* This represents the version of IC body. */
ic_version = (etd->fw_version & 0x0f0000) >> 16;
/*
* Sanity check based on the constant bits of a packet.
* The constant bits change depending on the value of
* the hardware flag 'crc_enabled' but are the same for
* every packet, regardless of the type.
* the hardware flag 'crc_enabled' and the version of
* the IC body, but are the same for every packet,
* regardless of the type.
*/
if (etd->crc_enabled)
sanity_check = ((packet[3] & 0x08) == 0x00);
else if (ic_version == 7 && etd->samples[1] == 0x2A)
sanity_check = ((packet[3] & 0x1c) == 0x10);
else
sanity_check = ((packet[0] & 0x0c) == 0x04 &&
(packet[3] & 0x1c) == 0x10);
@ -1116,6 +1123,7 @@ static int elantech_get_resolution_v4(struct psmouse *psmouse,
* Avatar AVIU-145A2 0x361f00 ? clickpad
* Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons
* Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons
* Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons
* Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**)
* Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons
* Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*)
@ -1651,6 +1659,16 @@ int elantech_init(struct psmouse *psmouse)
etd->capabilities[0], etd->capabilities[1],
etd->capabilities[2]);
if (etd->hw_version != 1) {
if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, etd->samples)) {
psmouse_err(psmouse, "failed to query sample data\n");
goto init_fail;
}
psmouse_info(psmouse,
"Elan sample query result %02x, %02x, %02x\n",
etd->samples[0], etd->samples[1], etd->samples[2]);
}
if (elantech_set_absolute_mode(psmouse)) {
psmouse_err(psmouse,
"failed to put touchpad into absolute mode.\n");

1
drivers/input/mouse/elantech.h
View File

@ -129,6 +129,7 @@ struct elantech_data {
unsigned char reg_26;
unsigned char debug;
unsigned char capabilities[3];
unsigned char samples[3];
bool paritycheck;
bool jumpy_cursor;
bool reports_pressure;