Merge branch 'msm-core' of git://codeaurora.org/quic/kernel/dwalker/linux-msm

[pandora-kernel.git] / drivers / hid / hid-ntrig.c

diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index 9b24fc5..4777bbf 100644 (file)
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -1,8 +1,8 @@
 /*
  *  HID driver for N-Trig touchscreens
  *
- *  Copyright (c) 2008 Rafi Rubin
- *  Copyright (c) 2009 Stephane Chatty
+ *  Copyright (c) 2008-2010 Rafi Rubin
+ *  Copyright (c) 2009-2010 Stephane Chatty
  *
  */
 
@@ -15,6 +15,8 @@
 
 #include <linux/device.h>
 #include <linux/hid.h>
+#include <linux/usb.h>
+#include "usbhid/usbhid.h"
 #include <linux/module.h>
 #include <linux/slab.h>
 
@@ -22,17 +24,16 @@
 
 #define NTRIG_DUPLICATE_USAGES 0x001
 
-#define nt_map_key_clear(c)    hid_map_usage_clear(hi, usage, bit, max, \
-                                       EV_KEY, (c))
-
 struct ntrig_data {
        /* Incoming raw values for a single contact */
        __u16 x, y, w, h;
        __u16 id;
-       __u8 confidence;
+
+       bool tipswitch;
+       bool confidence;
+       bool first_contact_touch;
 
        bool reading_mt;
-       __u8 first_contact_confidence;
 
        __u8 mt_footer[4];
        __u8 mt_foot_count;
@@ -139,9 +140,10 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
                case 0xff000001:
                        /* Tag indicating the start of a multitouch group */
                        nd->reading_mt = 1;
-                       nd->first_contact_confidence = 0;
+                       nd->first_contact_touch = 0;
                        break;
                case HID_DG_TIPSWITCH:
+                       nd->tipswitch = value;
                        /* Prevent emission of touch until validated */
                        return 1;
                case HID_DG_CONFIDENCE:
@@ -169,8 +171,14 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
                         * to emit a normal (X, Y) position
                         */
                        if (!nd->reading_mt) {
+                               /*
+                                * TipSwitch indicates the presence of a
+                                * finger in single touch mode.
+                                */
+                               input_report_key(input, BTN_TOUCH,
+                                                nd->tipswitch);
                                input_report_key(input, BTN_TOOL_DOUBLETAP,
-                                                (nd->confidence != 0));
+                                                nd->tipswitch);
                                input_event(input, EV_ABS, ABS_X, nd->x);
                                input_event(input, EV_ABS, ABS_Y, nd->y);
                        }
@@ -209,7 +217,13 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
 
                        /* emit a normal (X, Y) for the first point only */
                        if (nd->id == 0) {
-                               nd->first_contact_confidence = nd->confidence;
+                               /*
+                                * TipSwitch is superfluous in multitouch
+                                * mode.  The footer events tell us
+                                * if there is a finger on the screen or
+                                * not.
+                                */
+                               nd->first_contact_touch = nd->confidence;
                                input_event(input, EV_ABS, ABS_X, nd->x);
                                input_event(input, EV_ABS, ABS_Y, nd->y);
                        }
@@ -239,30 +253,11 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
 
                        nd->reading_mt = 0;
 
-                       if (nd->first_contact_confidence) {
-                               switch (value) {
-                               case 0: /* for single touch devices */
-                               case 1:
-                                       input_report_key(input,
-                                                       BTN_TOOL_DOUBLETAP, 1);
-                                       break;
-                               case 2:
-                                       input_report_key(input,
-                                                       BTN_TOOL_TRIPLETAP, 1);
-                                       break;
-                               case 3:
-                               default:
-                                       input_report_key(input,
-                                                       BTN_TOOL_QUADTAP, 1);
-                               }
+                       if (nd->first_contact_touch) {
+                               input_report_key(input, BTN_TOOL_DOUBLETAP, 1);
                                input_report_key(input, BTN_TOUCH, 1);
                        } else {
-                               input_report_key(input,
-                                               BTN_TOOL_DOUBLETAP, 0);
-                               input_report_key(input,
-                                               BTN_TOOL_TRIPLETAP, 0);
-                               input_report_key(input,
-                                               BTN_TOOL_QUADTAP, 0);
+                               input_report_key(input, BTN_TOOL_DOUBLETAP, 0);
                                input_report_key(input, BTN_TOUCH, 0);
                        }
                        break;
@@ -286,6 +281,7 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
        struct ntrig_data *nd;
        struct hid_input *hidinput;
        struct input_dev *input;
+       struct hid_report *report;
 
        if (id->driver_data)
                hdev->quirks |= HID_QUIRK_MULTI_INPUT;
@@ -327,13 +323,7 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
                        __clear_bit(BTN_TOOL_PEN, input->keybit);
                        __clear_bit(BTN_TOOL_FINGER, input->keybit);
                        __clear_bit(BTN_0, input->keybit);
-                       /*
-                        * A little something special to enable
-                        * two and three finger taps.
-                        */
                        __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
-                       __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
-                       __set_bit(BTN_TOOL_QUADTAP, input->keybit);
                        /*
                         * The physical touchscreen (single touch)
                         * input has a value for physical, whereas
@@ -349,6 +339,12 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
                }
        }
 
+       /* This is needed for devices with more recent firmware versions */
+       report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0x0a];
+       if (report)
+               usbhid_submit_report(hdev, report, USB_DIR_OUT);
+
+
        return 0;
 err_free:
        kfree(nd);