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authorHenrik Rydberg <rydberg@euromail.se>2014-07-14 17:26:56 (GMT)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2014-08-08 16:17:01 (GMT)
commite08d9afa9345f9a0e13cfff1d116b3a9b10d9dcb (patch)
treec8d00350261b69e444bf5ff17e1da247b045b19c /drivers/input
parentae84197f8a5e29d9b949fb515493d05bf7723f5c (diff)
downloadlinux-e08d9afa9345f9a0e13cfff1d116b3a9b10d9dcb.tar.xz
Input: synaptics - use firmware data for Cr-48
The profile sensor clickpad in a Cr-48 Chromebook does a reasonable job of tracking individual fingers. This tracking isn't perfect, but, experiments show that it works better than just passing "semi-mt" data to userspace, and making userspace try to deduce where the fingers are given a bounding box. This patch tries to report correct two-finger positions instead of the {(min_x, min_y), (max_x, max_y)} for profile sensor clickpads on Cr-48 chromebooks. Note that this device's firmware always reports the higher (smaller y) finger in the "sgm" packet, and the lower (larger y) finger in the "agm" packet. Thus, when a new finger arrives on the pad, the kernel driver uses input core's contact tracking facilities to match contacts with slots. Inspired by patch by Daniel Kurtz <djkurtz@chromium.org> and Chung-yih Wang <cywang@chromium.org> Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Reviewed-by: Benson Leung <bleung@chromium.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/mouse/synaptics.c70
1 files changed, 68 insertions, 2 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index f0142f2..35ade3b 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -117,6 +117,9 @@ void synaptics_reset(struct psmouse *psmouse)
}
#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
+
+static bool cr48_profile_sensor;
+
struct min_max_quirk {
const char * const *pnp_ids;
int x_min, x_max, y_min, y_max;
@@ -1151,6 +1154,42 @@ static void synaptics_image_sensor_process(struct psmouse *psmouse,
priv->agm_pending = false;
}
+static void synaptics_profile_sensor_process(struct psmouse *psmouse,
+ struct synaptics_hw_state *sgm,
+ int num_fingers)
+{
+ struct input_dev *dev = psmouse->dev;
+ struct synaptics_data *priv = psmouse->private;
+ struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
+ struct input_mt_pos pos[2];
+ int slot[2], nsemi, i;
+
+ nsemi = clamp_val(num_fingers, 0, 2);
+
+ for (i = 0; i < nsemi; i++) {
+ pos[i].x = hw[i]->x;
+ pos[i].y = synaptics_invert_y(hw[i]->y);
+ }
+
+ input_mt_assign_slots(dev, slot, pos, nsemi);
+
+ for (i = 0; i < nsemi; i++) {
+ input_mt_slot(dev, slot[i]);
+ input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
+ input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
+ input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
+ input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
+ }
+
+ input_mt_drop_unused(dev);
+ input_mt_report_pointer_emulation(dev, false);
+ input_mt_report_finger_count(dev, num_fingers);
+
+ synaptics_report_buttons(psmouse, sgm);
+
+ input_sync(dev);
+}
+
/*
* called for each full received packet from the touchpad
*/
@@ -1214,6 +1253,11 @@ static void synaptics_process_packet(struct psmouse *psmouse)
finger_width = 0;
}
+ if (cr48_profile_sensor) {
+ synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
+ return;
+ }
+
if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
num_fingers);
@@ -1359,6 +1403,9 @@ static void set_input_params(struct psmouse *psmouse,
set_abs_position_params(dev, priv, ABS_X, ABS_Y);
input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
+ if (cr48_profile_sensor)
+ input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
+
if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
ABS_MT_POSITION_Y);
@@ -1372,9 +1419,14 @@ static void set_input_params(struct psmouse *psmouse,
} else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
ABS_MT_POSITION_Y);
- /* Non-image sensors with AGM use semi-mt */
+ /*
+ * Profile sensor in CR-48 tracks contacts reasonably well,
+ * other non-image sensors with AGM use semi-mt.
+ */
input_mt_init_slots(dev, 2,
- INPUT_MT_POINTER | INPUT_MT_SEMI_MT);
+ INPUT_MT_POINTER |
+ (cr48_profile_sensor ?
+ INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
}
if (SYN_CAP_PALMDETECT(priv->capabilities))
@@ -1576,10 +1628,24 @@ static const struct dmi_system_id olpc_dmi_table[] __initconst = {
{ }
};
+static const struct dmi_system_id __initconst cr48_dmi_table[] = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+ {
+ /* Cr-48 Chromebook (Codename Mario) */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
+ },
+ },
+#endif
+ { }
+};
+
void __init synaptics_module_init(void)
{
impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
broken_olpc_ec = dmi_check_system(olpc_dmi_table);
+ cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
}
static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)