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path: root/drivers/input/mouse/elantech.c
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Diffstat (limited to 'drivers/input/mouse/elantech.c')
-rw-r--r--drivers/input/mouse/elantech.c80
1 files changed, 67 insertions, 13 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index e2a9867c19d5..d2c0db159b18 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -43,6 +43,24 @@ static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c,
}
/*
+ * 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
*/
static int elantech_ps2_command(struct psmouse *psmouse,
@@ -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];
@@ -913,6 +931,30 @@ static int elantech_set_range(struct psmouse *psmouse,
}
/*
+ * (value from firmware) * 10 + 790 = dpi
+ * we also have to convert dpi to dots/mm (*10/254 to avoid floating point)
+ */
+static unsigned int elantech_convert_res(unsigned int val)
+{
+ return (val * 10 + 790) * 10 / 254;
+}
+
+static int elantech_get_resolution_v4(struct psmouse *psmouse,
+ unsigned int *x_res,
+ unsigned int *y_res)
+{
+ unsigned char param[3];
+
+ if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param))
+ return -1;
+
+ *x_res = elantech_convert_res(param[1] & 0x0f);
+ *y_res = elantech_convert_res((param[1] & 0xf0) >> 4);
+
+ return 0;
+}
+
+/*
* Set the appropriate event bits for the input subsystem
*/
static int elantech_set_input_params(struct psmouse *psmouse)
@@ -920,6 +962,7 @@ static int elantech_set_input_params(struct psmouse *psmouse)
struct input_dev *dev = psmouse->dev;
struct elantech_data *etd = psmouse->private;
unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
+ unsigned int x_res = 0, y_res = 0;
if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
return -1;
@@ -967,10 +1010,20 @@ static int elantech_set_input_params(struct psmouse *psmouse)
break;
case 4:
+ if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) {
+ /*
+ * if query failed, print a warning and leave the values
+ * zero to resemble synaptics.c behavior.
+ */
+ psmouse_warn(psmouse, "couldn't query resolution data.\n");
+ }
+
__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
/* For X to recognize me as touchpad. */
input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
+ input_abs_set_res(dev, ABS_X, x_res);
+ input_abs_set_res(dev, ABS_Y, y_res);
/*
* range of pressure and width is the same as v2,
* report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility.
@@ -983,6 +1036,8 @@ static int elantech_set_input_params(struct psmouse *psmouse)
input_mt_init_slots(dev, ETP_MAX_FINGERS);
input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0);
input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0);
+ input_abs_set_res(dev, ABS_MT_POSITION_X, x_res);
+ input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res);
input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2,
ETP_PMAX_V2, 0, 0);
/*
@@ -1031,16 +1086,13 @@ static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
struct elantech_data *etd = psmouse->private;
struct elantech_attr_data *attr = data;
unsigned char *reg = (unsigned char *) etd + attr->field_offset;
- unsigned long value;
+ unsigned char value;
int err;
- err = strict_strtoul(buf, 16, &value);
+ err = kstrtou8(buf, 16, &value);
if (err)
return err;
- if (value > 0xff)
- return -EINVAL;
-
/* Do we need to preserve some bits for version 2 hardware too? */
if (etd->hw_version == 1) {
if (attr->reg == 0x10)
@@ -1233,9 +1285,11 @@ static int elantech_set_properties(struct elantech_data *etd)
}
}
- /*
- * 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;
/*
@@ -1291,7 +1345,7 @@ 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;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-03 16:48:35 +0300