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Input: elantech - add support for elantech fast command

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Starting with v3 hardware, the firmware supports this shorter
elantech_send_cmd. Teach the driver to use it.

Signed-off-by: JJ Ding <jj_ding@emc.com.tw>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
JJ Ding 2011-11-20 22:21:45 -08:00 committed by Dmitry Torokhov
parent 8672bd93d3
commit b56b92a9a1
2 changed files with 29 additions and 8 deletions
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36
drivers/input/mouse/elantech.c
View file

@ -42,6 +42,24 @@ static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
return 0;
}
/*
* V3 and later support this fast command
*/
static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c,
unsigned char *param)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) ||
ps2_command(ps2dev, NULL, c) ||
ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c);
return -1;
}
return 0;
}
/*
* A retrying version of ps2_command
*/
@ -863,13 +881,13 @@ static int elantech_set_range(struct psmouse *psmouse,
i = (etd->fw_version > 0x020800 &&
etd->fw_version < 0x020900) ? 1 : 2;
if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
return -1;
fixed_dpi = param[1] & 0x10;
if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
if (synaptics_send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
return -1;
*x_max = (etd->capabilities[1] - i) * param[1] / 2;
@ -888,7 +906,7 @@ static int elantech_set_range(struct psmouse *psmouse,
break;
case 3:
if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
return -1;
*x_max = (0x0f & param[0]) << 8 | param[1];
@ -896,7 +914,7 @@ static int elantech_set_range(struct psmouse *psmouse,
break;
case 4:
if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param))
if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
return -1;
*x_max = (0x0f & param[0]) << 8 | param[1];
@ -1220,9 +1238,11 @@ static int elantech_set_properties(struct elantech_data *etd)
else
return -1;
/*
* Turn on packet checking by default.
*/
/* decide which send_cmd we're gonna use early */
etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :
synaptics_send_cmd;
/* Turn on packet checking by default */
etd->paritycheck = 1;
/*
@ -1278,7 +1298,7 @@ int elantech_init(struct psmouse *psmouse)
"assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
etd->hw_version, param[0], param[1], param[2]);
if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
etd->capabilities)) {
psmouse_err(psmouse, "failed to query capabilities.\n");
goto init_fail;

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

@ -135,6 +135,7 @@ struct elantech_data {
unsigned int width;
struct finger_pos mt[ETP_MAX_FINGERS];
unsigned char parity[256];
int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param);
};
#ifdef CONFIG_MOUSE_PS2_ELANTECH