Input: ALPS - move pixel and bitmap info into alps_data struct

Newer touchpads use different constants, so make them runtime-
configurable.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Tested-by: Dave Turvene <dturvene@dahetral.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

2 files changed, 33 insertions, 22 deletions

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index bfc193806fc1..2cd8be774f91 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -27,12 +27,6 @@
 /*
  * Definitions for ALPS version 3 and 4 command mode protocol
  */
-#define ALPS_V3_X_MAX   2000
-#define ALPS_V3_Y_MAX   1400
-
-#define ALPS_BITMAP_X_BITS      15
-#define ALPS_BITMAP_Y_BITS      11
-
 #define ALPS_CMD_NIBBLE_10      0x01f2
 
 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
@@ -269,7 +263,8 @@ static void alps_process_packet_v1_v2(struct psmouse *psmouse)
  * These points are returned in x1, y1, x2, and y2 when the return value
  * is greater than 0.
  */
-static int alps_process_bitmap(unsigned int x_map, unsigned int y_map,
+static int alps_process_bitmap(struct alps_data *priv,
+                               unsigned int x_map, unsigned int y_map,
                                int *x1, int *y1, int *x2, int *y2)
 {
         struct alps_bitmap_point {
@@ -311,7 +306,7 @@ static int alps_process_bitmap(unsigned int x_map, unsigned int y_map,
          * y bitmap is reversed for what we need (lower positions are in
          * higher bits), so we process from the top end.
          */
-        y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - ALPS_BITMAP_Y_BITS);
+        y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - priv->y_bits);
         prev_bit = 0;
         point = &y_low;
         for (i = 0; y_map != 0; i++, y_map <<= 1) {
@@ -357,16 +352,18 @@ static int alps_process_bitmap(unsigned int x_map, unsigned int y_map,
                 }
         }
 
-        *x1 = (ALPS_V3_X_MAX * (2 * x_low.start_bit + x_low.num_bits - 1)) /
-              (2 * (ALPS_BITMAP_X_BITS - 1));
-        *y1 = (ALPS_V3_Y_MAX * (2 * y_low.start_bit + y_low.num_bits - 1)) /
-              (2 * (ALPS_BITMAP_Y_BITS - 1));
+        *x1 = (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
+              (2 * (priv->x_bits - 1));
+        *y1 = (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
+              (2 * (priv->y_bits - 1));
 
         if (fingers > 1) {
-                *x2 = (ALPS_V3_X_MAX * (2 * x_high.start_bit + x_high.num_bits - 1)) /
-                      (2 * (ALPS_BITMAP_X_BITS - 1));
-                *y2 = (ALPS_V3_Y_MAX * (2 * y_high.start_bit + y_high.num_bits - 1)) /
-                      (2 * (ALPS_BITMAP_Y_BITS - 1));
+                *x2 = (priv->x_max *
+                       (2 * x_high.start_bit + x_high.num_bits - 1)) /
+                      (2 * (priv->x_bits - 1));
+                *y2 = (priv->y_max *
+                       (2 * y_high.start_bit + y_high.num_bits - 1)) /
+                      (2 * (priv->y_bits - 1));
         }
 
         return fingers;
@@ -484,7 +481,8 @@ static void alps_process_touchpad_packet_v3(struct psmouse *psmouse)
                                    ((packet[2] & 0x7f) << 1) |
                                    (packet[4] & 0x01);
 
-                        bmap_fingers = alps_process_bitmap(x_bitmap, y_bitmap,
+                        bmap_fingers = alps_process_bitmap(priv,
+                                                           x_bitmap, y_bitmap,
                                                            &x1, &y1, &x2, &y2);
 
                         /*
@@ -641,7 +639,7 @@ static void alps_process_packet_v4(struct psmouse *psmouse)
                            ((priv->multi_data[3] & 0x1f) << 5) |
                             (priv->multi_data[1] & 0x1f);
 
-                fingers = alps_process_bitmap(x_bitmap, y_bitmap,
+                fingers = alps_process_bitmap(priv, x_bitmap, y_bitmap,
                                               &x1, &y1, &x2, &y2);
 
                 /* Store MT data.*/
@@ -1414,6 +1412,11 @@ static void alps_set_defaults(struct alps_data *priv)
         priv->mask0 = 0x8f;
         priv->flags = ALPS_DUALPOINT;
 
+        priv->x_max = 2000;
+        priv->y_max = 1400;
+        priv->x_bits = 15;
+        priv->y_bits = 11;
+
         switch (priv->proto_version) {
         case ALPS_PROTO_V1:
         case ALPS_PROTO_V2:
@@ -1544,15 +1547,15 @@ static void alps_set_abs_params_mt(struct alps_data *priv,
 {
         set_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
         input_mt_init_slots(dev1, 2, 0);
-        input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, ALPS_V3_X_MAX, 0, 0);
-        input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, ALPS_V3_Y_MAX, 0, 0);
+        input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
+        input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
 
         set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
 
-        input_set_abs_params(dev1, ABS_X, 0, ALPS_V3_X_MAX, 0, 0);
-        input_set_abs_params(dev1, ABS_Y, 0, ALPS_V3_Y_MAX, 0, 0);
+        input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
+        input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
 }
 
 int alps_init(struct psmouse *psmouse)
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index 0934f8bf7d76..5e638be33dc9 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -72,6 +72,10 @@ struct alps_nibble_commands {
  *   mask0, should match byte0.
  * @mask0: The mask used to check the first byte of the report.
  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
+ * @x_max: Largest possible X position value.
+ * @y_max: Largest possible Y position value.
+ * @x_bits: Number of X bits in the MT bitmap.
+ * @y_bits: Number of Y bits in the MT bitmap.
  * @hw_init: Protocol-specific hardware init function.
  * @process_packet: Protocol-specific function to process a report packet.
  * @set_abs_params: Protocol-specific function to configure the input_dev.
@@ -96,6 +100,10 @@ struct alps_data {
         unsigned char proto_version;
         unsigned char byte0, mask0;
         unsigned char flags;
+        int x_max;
+        int y_max;
+        int x_bits;
+        int y_bits;
 
         int (*hw_init)(struct psmouse *psmouse);
         void (*process_packet)(struct psmouse *psmouse);