Input: wacom_i2c - implement hovering capability

Although BTN_TOOL_PEN and BTN_TOOL_RUBBER functioned properly, the driver
didn't have hover functionality, so it's been added.

Also, "WACOM_RETRY_CNT" was not used, so it was removed.

Signed-off-by: Tatsunosuke Tobita <tobita.tatsunosuke@wacom.co.jp>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/drivers/input/touchscreen/wacom_i2c.c b/drivers/input/touchscreen/wacom_i2c.c
index bf0d07620bac..7ccaa1b12b05 100644
--- a/drivers/input/touchscreen/wacom_i2c.c
+++ b/drivers/input/touchscreen/wacom_i2c.c
@@ -1,7 +1,7 @@
 /*
  * Wacom Penabled Driver for I2C
  *
- * Copyright (c) 2011 Tatsunosuke Tobita, Wacom.
+ * Copyright (c) 2011 - 2013 Tatsunosuke Tobita, Wacom.
  * <tobita.tatsunosuke@wacom.co.jp>
  *
  * This program is free software; you can redistribute it
@@ -27,7 +27,6 @@
 #define WACOM_CMD_THROW0        0x05
 #define WACOM_CMD_THROW1        0x00
 #define WACOM_QUERY_SIZE        19
-#define WACOM_RETRY_CNT         100
 
 struct wacom_features {
         int x_max;
@@ -40,6 +39,8 @@ struct wacom_i2c {
         struct i2c_client *client;
         struct input_dev *input;
         u8 data[WACOM_QUERY_SIZE];
+        bool prox;
+        int tool;
 };
 
 static int wacom_query_device(struct i2c_client *client,
@@ -112,9 +113,14 @@ static irqreturn_t wacom_i2c_irq(int irq, void *dev_id)
         y = le16_to_cpup((__le16 *)&data[6]);
         pressure = le16_to_cpup((__le16 *)&data[8]);
 
+        if (!wac_i2c->prox)
+                wac_i2c->tool = (data[3] & 0x0c) ?
+                        BTN_TOOL_RUBBER : BTN_TOOL_PEN;
+
+        wac_i2c->prox = data[3] & 0x20;
+
         input_report_key(input, BTN_TOUCH, tsw || ers);
-        input_report_key(input, BTN_TOOL_PEN, tsw);
-        input_report_key(input, BTN_TOOL_RUBBER, ers);
+        input_report_key(input, wac_i2c->tool, wac_i2c->prox);
         input_report_key(input, BTN_STYLUS, f1);
         input_report_key(input, BTN_STYLUS2, f2);
         input_report_abs(input, ABS_X, x);