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authorHenrik Rydberg <rydberg@euromail.se>2010-12-21 18:11:25 +0100
committerHenrik Rydberg <rydberg@euromail.se>2010-12-21 18:11:25 +0100
commitfec6e5252b542e748871c88f8455e69ae73ea156 (patch)
tree6d159877951139e8b574e3384ae37a15da471495
parentc14890a8e54977f895773d393d6a640d6d698fb8 (diff)
Input: synaptics - add multi-finger and semi-mt support
The Synaptics 2.7 series of touchpads support a mode for reporting two sets of X/Y/Pressure data (advanced gesture mode). By default, these devices report only single finger data, depriving userspace of the nowadays ubiquitous two-finger scroll gesture. Enabling advanced gesture mode also enables the multi-finger report, although the device does not claim that capability. Up to three fingers can be reported this way. While two or three fingers are touching, the normal packet is prepended by a reduced finger packet of lower resolution. From the two packets (which do not represent the actual fingers), the bounding rectangle of the individual contacts can be extracted. This information is sufficient to perform scaling gestures and a limited form of rotation gesture. The behavior has been coined semi-mt capability, and is signaled to userspace via the INPUT_PROP_SEMI_MT device property. Work to decode the advanced gesture packet: Takashi Iwai. Cleanup and testing of the original patch: Chase Douglas. Minor cleanup and testing: Chris Bagwell. Finalization and semi-mt support: Henrik Rydberg. Reported-by: Tobyn Bertram Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Chase Douglas <chase.douglas@canonical.com> Signed-off-by: Chris Bagwell <chris@cnpbagwell.com> Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
-rw-r--r--drivers/input/mouse/synaptics.c88
-rw-r--r--drivers/input/mouse/synaptics.h3
2 files changed, 88 insertions, 3 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 8997cbc69dcc..6514928fd35f 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -25,7 +25,7 @@
#include <linux/module.h>
#include <linux/dmi.h>
-#include <linux/input.h>
+#include <linux/input/mt.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/slab.h>
@@ -279,6 +279,25 @@ static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
synaptics_mode_cmd(psmouse, priv->mode);
}
+static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
+{
+ static unsigned char param = 0xc8;
+ struct synaptics_data *priv = psmouse->private;
+
+ if (!SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
+ return 0;
+
+ if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
+ return -1;
+ if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
+ return -1;
+
+ /* Advanced gesture mode also sends multi finger data */
+ priv->capabilities |= BIT(1);
+
+ return 0;
+}
+
/*****************************************************************************
* Synaptics pass-through PS/2 port support
****************************************************************************/
@@ -380,7 +399,9 @@ static void synaptics_pt_create(struct psmouse *psmouse)
* Functions to interpret the absolute mode packets
****************************************************************************/
-static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
+static int synaptics_parse_hw_state(const unsigned char buf[],
+ struct synaptics_data *priv,
+ struct synaptics_hw_state *hw)
{
memset(hw, 0, sizeof(struct synaptics_hw_state));
@@ -397,6 +418,14 @@ static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data
((buf[0] & 0x04) >> 1) |
((buf[3] & 0x04) >> 2));
+ if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) && hw->w == 2) {
+ /* Gesture packet: (x, y, z) at half resolution */
+ priv->mt.x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
+ priv->mt.y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
+ priv->mt.z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
+ return 1;
+ }
+
hw->left = (buf[0] & 0x01) ? 1 : 0;
hw->right = (buf[0] & 0x02) ? 1 : 0;
@@ -452,6 +481,36 @@ static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data
hw->left = (buf[0] & 0x01) ? 1 : 0;
hw->right = (buf[0] & 0x02) ? 1 : 0;
}
+
+ return 0;
+}
+
+static void set_slot(struct input_dev *dev, int slot, bool active, int x, int y)
+{
+ input_mt_slot(dev, slot);
+ input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
+ if (active) {
+ input_report_abs(dev, ABS_MT_POSITION_X, x);
+ input_report_abs(dev, ABS_MT_POSITION_Y,
+ YMAX_NOMINAL + YMIN_NOMINAL - y);
+ }
+}
+
+static void synaptics_report_semi_mt_data(struct input_dev *dev,
+ const struct synaptics_hw_state *a,
+ const struct synaptics_hw_state *b,
+ int num_fingers)
+{
+ if (num_fingers >= 2) {
+ set_slot(dev, 0, true, min(a->x, b->x), min(a->y, b->y));
+ set_slot(dev, 1, true, max(a->x, b->x), max(a->y, b->y));
+ } else if (num_fingers == 1) {
+ set_slot(dev, 0, true, a->x, a->y);
+ set_slot(dev, 1, false, 0, 0);
+ } else {
+ set_slot(dev, 0, false, 0, 0);
+ set_slot(dev, 1, false, 0, 0);
+ }
}
/*
@@ -466,7 +525,8 @@ static void synaptics_process_packet(struct psmouse *psmouse)
int finger_width;
int i;
- synaptics_parse_hw_state(psmouse->packet, priv, &hw);
+ if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
+ return;
if (hw.scroll) {
priv->scroll += hw.scroll;
@@ -512,6 +572,9 @@ static void synaptics_process_packet(struct psmouse *psmouse)
finger_width = 0;
}
+ if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
+ synaptics_report_semi_mt_data(dev, &hw, &priv->mt, num_fingers);
+
/* Post events
* BTN_TOUCH has to be first as mousedev relies on it when doing
* absolute -> relative conversion
@@ -631,6 +694,15 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
YMIN_NOMINAL, priv->y_max ?: YMAX_NOMINAL, 0, 0);
input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
+ if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
+ __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
+ input_mt_init_slots(dev, 2);
+ input_set_abs_params(dev, ABS_MT_POSITION_X, XMIN_NOMINAL,
+ priv->x_max ?: XMAX_NOMINAL, 0, 0);
+ input_set_abs_params(dev, ABS_MT_POSITION_Y, YMIN_NOMINAL,
+ priv->y_max ?: YMAX_NOMINAL, 0, 0);
+ }
+
if (SYN_CAP_PALMDETECT(priv->capabilities))
input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
@@ -705,6 +777,11 @@ static int synaptics_reconnect(struct psmouse *psmouse)
return -1;
}
+ if (synaptics_set_advanced_gesture_mode(psmouse)) {
+ printk(KERN_ERR "Advanced gesture mode reconnect failed.\n");
+ return -1;
+ }
+
return 0;
}
@@ -772,6 +849,11 @@ int synaptics_init(struct psmouse *psmouse)
goto init_fail;
}
+ if (synaptics_set_advanced_gesture_mode(psmouse)) {
+ printk(KERN_ERR "Advanced gesture mode init failed.\n");
+ goto init_fail;
+ }
+
priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index 613a3652f98f..50e20e9da442 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -53,6 +53,7 @@
#define SYN_CAP_PRODUCT_ID(ec) (((ec) & 0xff0000) >> 16)
#define SYN_CAP_CLICKPAD(ex0c) ((ex0c) & 0x100100)
#define SYN_CAP_MAX_DIMENSIONS(ex0c) ((ex0c) & 0x020000)
+#define SYN_CAP_ADV_GESTURE(ex0c) ((ex0c) & 0x080000)
/* synaptics modes query bits */
#define SYN_MODE_ABSOLUTE(m) ((m) & (1 << 7))
@@ -112,6 +113,8 @@ struct synaptics_data {
int scroll;
struct serio *pt_port; /* Pass-through serio port */
+
+ struct synaptics_hw_state mt; /* current gesture packet */
};
void synaptics_module_init(void);