[1/4] Input: synaptics - add multitouch packet support

Commit Message

Henrik Rydberg Dec. 18, 2010, 2:52 p.m. UTC

None

Patch

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 2e300a4..8a769e9 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -279,6 +279,24 @@  static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 	synaptics_mode_cmd(psmouse, priv->mode);
 }
 
+static int synaptics_set_multitouch_mode(struct psmouse *psmouse)
+{
+	static unsigned char param = 0xc8;
+	struct synaptics_data *priv = psmouse->private;
+
+	if (!SYN_CAP_MULTITOUCH(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;
+
+	priv->multitouch = 1;
+	printk(KERN_INFO "Synaptics: Multitouch mode enabled\n");
+	return 0;
+}
+
 /*****************************************************************************
  *	Synaptics pass-through PS/2 port support
  ****************************************************************************/
@@ -380,23 +398,38 @@  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(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
 {
 	memset(hw, 0, sizeof(struct synaptics_hw_state));
 
 	if (SYN_MODEL_NEWABS(priv->model_id)) {
-		hw->x = (((buf[3] & 0x10) << 8) |
-			 ((buf[1] & 0x0f) << 8) |
-			 buf[4]);
-		hw->y = (((buf[3] & 0x20) << 7) |
-			 ((buf[1] & 0xf0) << 4) |
-			 buf[5]);
-
-		hw->z = buf[2];
 		hw->w = (((buf[0] & 0x30) >> 2) |
 			 ((buf[0] & 0x04) >> 1) |
 			 ((buf[3] & 0x04) >> 2));
 
+		if (priv->multitouch && hw->w == 2) {
+			/* Multitouch data is half normal resolution */
+			hw->x = (((buf[4] & 0x0f) << 8) |
+				 buf[1]) << 1;
+			hw->y = (((buf[4] & 0xf0) << 4) |
+				 buf[2]) << 1;
+
+			hw->z = ((buf[3] & 0x30) |
+				 (buf[5] & 0x0f)) << 1;
+
+			/* Only look at x, y, and z for MT */
+			return 1;
+		} else {
+			hw->x = (((buf[3] & 0x10) << 8) |
+				 ((buf[1] & 0x0f) << 8) |
+				 buf[4]);
+			hw->y = (((buf[3] & 0x20) << 7) |
+				 ((buf[1] & 0xf0) << 4) |
+				 buf[5]);
+
+			hw->z = buf[2];
+		}
+
 		hw->left  = (buf[0] & 0x01) ? 1 : 0;
 		hw->right = (buf[0] & 0x02) ? 1 : 0;
 
@@ -452,6 +485,8 @@  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;
 }
 
 /*
@@ -466,7 +501,10 @@  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)) {
+		priv->mt = hw;
+		return;
+	}
 
 	if (hw.scroll) {
 		priv->scroll += hw.scroll;
@@ -494,7 +532,8 @@  static void synaptics_process_packet(struct psmouse *psmouse)
 		if (SYN_CAP_EXTENDED(priv->capabilities)) {
 			switch (hw.w) {
 			case 0 ... 1:
-				if (SYN_CAP_MULTIFINGER(priv->capabilities))
+				if (SYN_CAP_MULTIFINGER(priv->capabilities) ||
+				    priv->multitouch)
 					num_fingers = hw.w + 2;
 				break;
 			case 2:
@@ -532,7 +571,7 @@  static void synaptics_process_packet(struct psmouse *psmouse)
 	input_report_key(dev, BTN_LEFT, hw.left);
 	input_report_key(dev, BTN_RIGHT, hw.right);
 
-	if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
+	if (SYN_CAP_MULTIFINGER(priv->capabilities) || priv->multitouch) {
 		input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 		input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 	}
@@ -638,7 +677,7 @@  static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 	__set_bit(BTN_LEFT, dev->keybit);
 	__set_bit(BTN_RIGHT, dev->keybit);
 
-	if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
+	if (SYN_CAP_MULTIFINGER(priv->capabilities) || priv->multitouch) {
 		__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 		__set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 	}
@@ -702,6 +741,11 @@  static int synaptics_reconnect(struct psmouse *psmouse)
 		return -1;
 	}
 
+	if (synaptics_set_multitouch_mode(psmouse)) {
+		printk(KERN_ERR "Unable to initialize Synaptics Multitouch.\n");
+		return -1;
+	}
+
 	return 0;
 }
 
@@ -769,6 +813,11 @@  int synaptics_init(struct psmouse *psmouse)
 		goto init_fail;
 	}
 
+	if (synaptics_set_multitouch_mode(psmouse)) {
+		printk(KERN_ERR "Unable to initialize Synaptics Multitouch.\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 613a365..4cb13b8 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_MULTITOUCH(ex0c)	((ex0c) & 0x080000)
 
 /* synaptics modes query bits */
 #define SYN_MODE_ABSOLUTE(m)		((m) & (1 << 7))
@@ -112,6 +113,9 @@  struct synaptics_data {
 	int scroll;
 
 	struct serio *pt_port;			/* Pass-through serio port */
+
+	int multitouch;				/* device provides MT data */
+	struct synaptics_hw_state mt;		/* current MT packet */
 };
 
 void synaptics_module_init(void);