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Subject[PATCH v5 3/8] Input: elantech - use firmware provided x, y ranges
Date
With newer hardware, the touchpad provides range info.
Let's use it.

Signed-off-by: JJ Ding <jj_ding@emc.com.tw>
Acked-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Éric Piel <eric.piel@tremplin-utc.net>
---
drivers/input/mouse/elantech.c | 71 +++++++++++++++++++++++++++++++--------
drivers/input/mouse/elantech.h | 3 +-
2 files changed, 58 insertions(+), 16 deletions(-)
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index cd8e2e5..282b8b6 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -223,7 +223,7 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse)
input_report_abs(dev, ABS_X,
((packet[1] & 0x0c) << 6) | packet[2]);
input_report_abs(dev, ABS_Y,
- ETP_YMAX_V1 - (((packet[1] & 0x03) << 8) | packet[3]));
+ etd->y_max - (((packet[1] & 0x03) << 8) | packet[3]));
}

input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
@@ -233,7 +233,7 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse)
input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);

if (etd->fw_version < 0x020000 &&
- (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
+ (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
/* rocker up */
input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
/* rocker down */
@@ -298,7 +298,7 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
* byte 4: . . . . y11 y10 y9 y8
* byte 5: y7 y6 y5 y4 y3 y2 y1 y0
*/
- y1 = ETP_YMAX_V2 - (((packet[4] & 0x0f) << 8) | packet[5]);
+ y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]);

pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4);
width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4);
@@ -313,7 +313,7 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
*/
x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2;
/* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */
- y1 = ETP_YMAX_V2 -
+ y1 = etd->y_max -
((((packet[0] & 0x20) << 3) | packet[2]) << 2);
/*
* byte 3: . . by8 bx8 . . . .
@@ -321,7 +321,7 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
*/
x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2;
/* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */
- y2 = ETP_YMAX_V2 -
+ y2 = etd->y_max -
((((packet[3] & 0x20) << 3) | packet[5]) << 2);

/* Unknown so just report sensible values */
@@ -468,6 +468,41 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
return rc;
}

+static void set_range(struct psmouse *psmouse, unsigned int *x_min,
+ unsigned int *y_min, unsigned int *x_max,
+ unsigned int *y_max)
+{
+ struct elantech_data *etd = psmouse->private;
+ int i;
+
+ switch (etd->hw_version) {
+ case 1:
+ *x_min = ETP_XMIN_V1;
+ *y_min = ETP_YMIN_V1;
+ *x_max = ETP_XMAX_V1;
+ *y_max = ETP_YMAX_V1;
+ break;
+
+ case 2:
+ if (etd->fw_version == 0x020800 ||
+ etd->fw_version == 0x020b00 ||
+ etd->fw_version == 0x020030) {
+ *x_min = ETP_XMIN_V2;
+ *y_min = ETP_YMIN_V2;
+ *x_max = ETP_XMAX_V2;
+ *y_max = ETP_YMAX_V2;
+ } else {
+ i = (etd->fw_version > 0x020800 &&
+ etd->fw_version < 0x020900) ? 1 : 2;
+ *x_min = 0;
+ *y_min = 0;
+ *x_max = (etd->capabilities[1] - i) * 64;
+ *y_max = (etd->capabilities[2] - i) * 64;
+ }
+ break;
+ }
+}
+
/*
* Set the appropriate event bits for the input subsystem
*/
@@ -475,6 +510,9 @@ static void 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;
+
+ set_range(psmouse, &x_min, &y_min, &x_max, &y_max);

__set_bit(EV_KEY, dev->evbit);
__set_bit(EV_ABS, dev->evbit);
@@ -492,18 +530,18 @@ static void elantech_set_input_params(struct psmouse *psmouse)
case 1:
/* Rocker button */
if (etd->fw_version < 0x020000 &&
- (etd->capabilities & ETP_CAP_HAS_ROCKER)) {
+ (etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
__set_bit(BTN_FORWARD, dev->keybit);
__set_bit(BTN_BACK, dev->keybit);
}
- input_set_abs_params(dev, ABS_X, ETP_XMIN_V1, ETP_XMAX_V1, 0, 0);
- input_set_abs_params(dev, ABS_Y, ETP_YMIN_V1, ETP_YMAX_V1, 0, 0);
+ 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);
break;

case 2:
__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
- input_set_abs_params(dev, ABS_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
- input_set_abs_params(dev, ABS_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
+ 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);
if (etd->reports_pressure) {
input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
ETP_PMAX_V2, 0, 0);
@@ -512,10 +550,12 @@ static void elantech_set_input_params(struct psmouse *psmouse)
}
__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
input_mt_init_slots(dev, 2);
- input_set_abs_params(dev, ABS_MT_POSITION_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0);
- input_set_abs_params(dev, ABS_MT_POSITION_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0);
+ 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);
break;
}
+
+ etd->y_max = y_max;
}

struct elantech_attr_data {
@@ -769,13 +809,14 @@ int elantech_init(struct psmouse *psmouse)
pr_info("assuming hardware version %d, firmware version %d.%d.%d\n",
etd->hw_version, param[0], param[1], param[2]);

- if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY, param)) {
+ if (synaptics_send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
+ etd->capabilities)) {
pr_err("failed to query capabilities.\n");
goto init_fail;
}
pr_info("Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
- param[0], param[1], param[2]);
- etd->capabilities = param[0];
+ etd->capabilities[0], etd->capabilities[1],
+ etd->capabilities[2]);

/*
* This firmware suffers from misreporting coordinates when
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index 1c5894e..b54ea27 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -93,13 +93,14 @@ struct elantech_data {
unsigned char reg_25;
unsigned char reg_26;
unsigned char debug;
- unsigned char capabilities;
+ unsigned char capabilities[3];
bool paritycheck;
bool jumpy_cursor;
bool reports_pressure;
unsigned char hw_version;
unsigned int fw_version;
unsigned int single_finger_reports;
+ unsigned int y_max;
unsigned char parity[256];
};

--
1.7.4.1
--
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