Merge branch 'next' into for-linus

[~andy/linux] / drivers / input / tablet / wacom_wac.c

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 93171098abbd276f216bb37b829e6a3b984089ad..c3468c8dbd891865b0fd2b4a8159f499ea8df1f1 100644 (file)
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -25,6 +25,11 @@
 #define WACOM_INTUOS_RES       100
 #define WACOM_INTUOS3_RES      200
 
+/* Scale factor relating reported contact size to logical contact area.
+ * 2^14/pi is a good approximation on Intuos5 and 3rd-gen Bamboo
+ */
+#define WACOM_CONTACT_AREA_SCALE 2607
+
 static int wacom_penpartner_irq(struct wacom_wac *wacom)
 {
        unsigned char *data = wacom->data;
@@ -326,7 +331,7 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
 
        /* Enter report */
        if ((data[1] & 0xfc) == 0xc0) {
-               if (features->type >= INTUOS5S && features->type <= INTUOS5L)
+               if (features->quirks == WACOM_QUIRK_MULTI_INPUT)
                        wacom->shared->stylus_in_proximity = true;
 
                /* serial number of the tool */
@@ -414,7 +419,7 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
 
        /* Exit report */
        if ((data[1] & 0xfe) == 0x80) {
-               if (features->type >= INTUOS5S && features->type <= INTUOS5L)
+               if (features->quirks == WACOM_QUIRK_MULTI_INPUT)
                        wacom->shared->stylus_in_proximity = false;
 
                /*
@@ -1043,11 +1048,19 @@ static void wacom_bpt3_touch_msg(struct wacom_wac *wacom, unsigned char *data)
        if (touch) {
                int x = (data[2] << 4) | (data[4] >> 4);
                int y = (data[3] << 4) | (data[4] & 0x0f);
-               int w = data[6];
+               int a = data[5];
+
+               // "a" is a scaled-down area which we assume is roughly
+               // circular and which can be described as: a=(pi*r^2)/C.
+               int x_res  = input_abs_get_res(input, ABS_X);
+               int y_res  = input_abs_get_res(input, ABS_Y);
+               int width  = 2 * int_sqrt(a * WACOM_CONTACT_AREA_SCALE);
+               int height = width * y_res / x_res;
 
                input_report_abs(input, ABS_MT_POSITION_X, x);
                input_report_abs(input, ABS_MT_POSITION_Y, y);
-               input_report_abs(input, ABS_MT_TOUCH_MAJOR, w);
+               input_report_abs(input, ABS_MT_TOUCH_MAJOR, width);
+               input_report_abs(input, ABS_MT_TOUCH_MINOR, height);
        }
 }
 
@@ -1530,10 +1543,12 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
                        __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
                        __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
 
-                       input_mt_init_slots(input_dev, features->touch_max);
+                       input_mt_init_slots(input_dev, features->touch_max, 0);
 
                        input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
-                                            0, 255, 0, 0);
+                                            0, features->x_max, 0, 0);
+                       input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR,
+                                            0, features->y_max, 0, 0);
 
                        input_set_abs_params(input_dev, ABS_MT_POSITION_X,
                                             0, features->x_max,
@@ -1575,7 +1590,7 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
 
        case TABLETPC2FG:
                if (features->device_type == BTN_TOOL_FINGER) {
-                       input_mt_init_slots(input_dev, features->touch_max);
+                       input_mt_init_slots(input_dev, features->touch_max, 0);
                        input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE,
                                        0, MT_TOOL_MAX, 0, 0);
                        input_set_abs_params(input_dev, ABS_MT_POSITION_X,
@@ -1631,7 +1646,7 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
 
                        __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
                        __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
-                       input_mt_init_slots(input_dev, features->touch_max);
+                       input_mt_init_slots(input_dev, features->touch_max, 0);
 
                        if (features->pktlen == WACOM_PKGLEN_BBTOUCH3) {
                                __set_bit(BTN_TOOL_TRIPLETAP,
@@ -1641,7 +1656,10 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
 
                                input_set_abs_params(input_dev,
                                                     ABS_MT_TOUCH_MAJOR,
-                                                    0, 255, 0, 0);
+                                                    0, features->x_max, 0, 0);
+                               input_set_abs_params(input_dev,
+                                                    ABS_MT_TOUCH_MINOR,
+                                                    0, features->y_max, 0, 0);
                        }
 
                        input_set_abs_params(input_dev, ABS_MT_POSITION_X,