Input: synaptics - set minimum coordinates as reported by firmware

Newer Synaptics firmware allows to query minimum coordinates reported by
the device, let's use this data.

Acked-by: Chase Douglas <chase.douglas@canonical.com>
Acked-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

2 files changed, 43 insertions, 21 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 86bd89a28710..5538fc657af1 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -207,27 +207,37 @@ static int synaptics_identify(struct psmouse *psmouse)
 static int synaptics_resolution(struct psmouse *psmouse)
 {
         struct synaptics_data *priv = psmouse->private;
-        unsigned char res[3];
-        unsigned char max[3];
+        unsigned char resp[3];
 
         if (SYN_ID_MAJOR(priv->identity) < 4)
                 return 0;
 
-        if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res) == 0) {
-                if (res[0] != 0 && (res[1] & 0x80) && res[2] != 0) {
-                        priv->x_res = res[0]; /* x resolution in units/mm */
-                        priv->y_res = res[2]; /* y resolution in units/mm */
+        if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
+                if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
+                        priv->x_res = resp[0]; /* x resolution in units/mm */
+                        priv->y_res = resp[2]; /* y resolution in units/mm */
                 }
         }
 
         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
-                if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_DIMENSIONS, max)) {
-                        printk(KERN_ERR "Synaptics claims to have dimensions query,"
-                               " but I'm not able to read it.\n");
+                if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
+                        printk(KERN_ERR "Synaptics claims to have max coordinates"
+                               " query, but I'm not able to read it.\n");
+                } else {
+                        priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
+                        priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
+                }
+        }
+
+        if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
+            SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
+                if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
+                        printk(KERN_ERR "Synaptics claims to have min coordinates"
+                               " query, but I'm not able to read it.\n");
                 } else {
-                        priv->x_max = (max[0] << 5) | ((max[1] & 0x0f) << 1);
-                        priv->y_max = (max[2] << 5) | ((max[1] & 0xf0) >> 3);
+                        priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
+                        priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
                 }
         }
 
@@ -693,19 +703,27 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
         __set_bit(INPUT_PROP_POINTER, dev->propbit);
 
         __set_bit(EV_ABS, dev->evbit);
-        input_set_abs_params(dev, ABS_X, XMIN_NOMINAL,
-                             priv->x_max ?: XMAX_NOMINAL, fuzz, 0);
-        input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL,
-                             priv->y_max ?: YMAX_NOMINAL, fuzz, 0);
+        input_set_abs_params(dev, ABS_X,
+                             priv->x_min ?: XMIN_NOMINAL,
+                             priv->x_max ?: XMAX_NOMINAL,
+                             fuzz, 0);
+        input_set_abs_params(dev, ABS_Y,
+                             priv->y_min ?: YMIN_NOMINAL,
+                             priv->y_max ?: YMAX_NOMINAL,
+                             fuzz, 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, fuzz, 0);
-                input_set_abs_params(dev, ABS_MT_POSITION_Y, YMIN_NOMINAL,
-                                     priv->y_max ?: YMAX_NOMINAL, fuzz, 0);
+                input_set_abs_params(dev, ABS_MT_POSITION_X,
+                                     priv->x_min ?: XMIN_NOMINAL,
+                                     priv->x_max ?: XMAX_NOMINAL,
+                                     fuzz, 0);
+                input_set_abs_params(dev, ABS_MT_POSITION_Y,
+                                     priv->y_min ?: YMIN_NOMINAL,
+                                     priv->y_max ?: YMAX_NOMINAL,
+                                     fuzz, 0);
 
                 input_abs_set_res(dev, ABS_MT_POSITION_X, priv->x_res);
                 input_abs_set_res(dev, ABS_MT_POSITION_Y, priv->y_res);
diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index b8025b0ee2bd..a4394e1f12a2 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -19,7 +19,8 @@
 #define SYN_QUE_RESOLUTION              0x08
 #define SYN_QUE_EXT_CAPAB               0x09
 #define SYN_QUE_EXT_CAPAB_0C            0x0c
-#define SYN_QUE_EXT_DIMENSIONS          0x0d
+#define SYN_QUE_EXT_MAX_COORDS          0x0d
+#define SYN_QUE_EXT_MIN_COORDS          0x0f
 
 /* synatics modes */
 #define SYN_BIT_ABSOLUTE_MODE           (1 << 7)
@@ -73,10 +74,12 @@
  * 2    0x04    reduced filtering       firmware does less filtering on
  *                                      position data, driver should watch
  *                                      for noise.
+ * 2    0x20    report min              query 0x0f gives min coord reported
  */
 #define SYN_CAP_CLICKPAD(ex0c)          ((ex0c) & 0x100000) /* 1-button ClickPad */
 #define SYN_CAP_CLICKPAD2BTN(ex0c)      ((ex0c) & 0x000100) /* 2-button ClickPad */
 #define SYN_CAP_MAX_DIMENSIONS(ex0c)    ((ex0c) & 0x020000)
+#define SYN_CAP_MIN_DIMENSIONS(ex0c)    ((ex0c) & 0x000200)
 #define SYN_CAP_ADV_GESTURE(ex0c)       ((ex0c) & 0x080000)
 #define SYN_CAP_REDUCED_FILTERING(ex0c) ((ex0c) & 0x000400)
 
@@ -134,7 +137,8 @@ struct synaptics_data {
         unsigned long int ext_cap_0c;           /* Ext Caps from 0x0c query */
         unsigned long int identity;             /* Identification */
         unsigned int x_res, y_res;              /* X/Y resolution in units/mm */
-        unsigned int x_max, y_max;              /* Max dimensions (from FW) */
+        unsigned int x_max, y_max;              /* Max coordinates (from FW) */
+        unsigned int x_min, y_min;              /* Min coordinates (from FW) */
 
         unsigned char pkt_type;                 /* packet type - old, new, etc */
         unsigned char mode;                     /* current mode byte */