Merge branch 'next' into for-linus

Conflicts:
	include/linux/input.h

1 files changed, 57 insertions, 74 deletions

diff --git a/drivers/hid/hid-egalax.c b/drivers/hid/hid-egalax.c
index 54b017ad258d..16566fcc08a3 100644
--- a/drivers/hid/hid-egalax.c
+++ b/drivers/hid/hid-egalax.c
@@ -2,6 +2,8 @@
  *  HID driver for eGalax dual-touch panels
  *
  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
+ *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
+ *  Copyright (c) 2010 Canonical, Ltd.
  *
  */
 
@@ -16,6 +18,7 @@
 #include <linux/hid.h>
 #include <linux/module.h>
 #include <linux/usb.h>
+#include <linux/input/mt.h>
 #include <linux/slab.h>
 #include "usbhid/usbhid.h"
 
@@ -25,38 +28,53 @@ MODULE_LICENSE("GPL");
 
 #include "hid-ids.h"
 
+#define MAX_SLOTS               2
+
+/* estimated signal-to-noise ratios */
+#define SN_MOVE                 4096
+#define SN_PRESSURE             32
+
 struct egalax_data {
-        __u16 x, y, z;
-        __u8 id;
-        bool first;             /* is this the first finger in the frame? */
-        bool valid;             /* valid finger data, or just placeholder? */
-        bool activity;          /* at least one active finger previously? */
-        __u16 lastx, lasty, lastz;      /* latest valid (x, y, z) in the frame */
+        int valid;
+        int slot;
+        int touch;
+        int x, y, z;
 };
 
+static void set_abs(struct input_dev *input, unsigned int code,
+                    struct hid_field *field, int snratio)
+{
+        int fmin = field->logical_minimum;
+        int fmax = field->logical_maximum;
+        int fuzz = snratio ? (fmax - fmin) / snratio : 0;
+        input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
+}
+
 static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
                 struct hid_field *field, struct hid_usage *usage,
                 unsigned long **bit, int *max)
 {
+        struct input_dev *input = hi->input;
+
         switch (usage->hid & HID_USAGE_PAGE) {
 
         case HID_UP_GENDESK:
                 switch (usage->hid) {
                 case HID_GD_X:
+                        field->logical_maximum = 32760;
                         hid_map_usage(hi, usage, bit, max,
                                         EV_ABS, ABS_MT_POSITION_X);
+                        set_abs(input, ABS_MT_POSITION_X, field, SN_MOVE);
                         /* touchscreen emulation */
-                        input_set_abs_params(hi->input, ABS_X,
-                                                field->logical_minimum,
-                                                field->logical_maximum, 0, 0);
+                        set_abs(input, ABS_X, field, SN_MOVE);
                         return 1;
                 case HID_GD_Y:
+                        field->logical_maximum = 32760;
                         hid_map_usage(hi, usage, bit, max,
                                         EV_ABS, ABS_MT_POSITION_Y);
+                        set_abs(input, ABS_MT_POSITION_Y, field, SN_MOVE);
                         /* touchscreen emulation */
-                        input_set_abs_params(hi->input, ABS_Y,
-                                                field->logical_minimum,
-                                                field->logical_maximum, 0, 0);
+                        set_abs(input, ABS_Y, field, SN_MOVE);
                         return 1;
                 }
                 return 0;
@@ -66,6 +84,7 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
                 case HID_DG_TIPSWITCH:
                         /* touchscreen emulation */
                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
+                        input_set_capability(input, EV_KEY, BTN_TOUCH);
                         return 1;
                 case HID_DG_INRANGE:
                 case HID_DG_CONFIDENCE:
@@ -73,16 +92,15 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,
                 case HID_DG_CONTACTMAX:
                         return -1;
                 case HID_DG_CONTACTID:
-                        hid_map_usage(hi, usage, bit, max,
-                                        EV_ABS, ABS_MT_TRACKING_ID);
+                        input_mt_init_slots(input, MAX_SLOTS);
                         return 1;
                 case HID_DG_TIPPRESSURE:
+                        field->logical_minimum = 0;
                         hid_map_usage(hi, usage, bit, max,
                                         EV_ABS, ABS_MT_PRESSURE);
+                        set_abs(input, ABS_MT_PRESSURE, field, SN_PRESSURE);
                         /* touchscreen emulation */
-                        input_set_abs_params(hi->input, ABS_PRESSURE,
-                                                field->logical_minimum,
-                                                field->logical_maximum, 0, 0);
+                        set_abs(input, ABS_PRESSURE, field, SN_PRESSURE);
                         return 1;
                 }
                 return 0;
@@ -96,10 +114,10 @@ static int egalax_input_mapped(struct hid_device *hdev, struct hid_input *hi,
                 struct hid_field *field, struct hid_usage *usage,
                 unsigned long **bit, int *max)
 {
+        /* tell hid-input to skip setup of these event types */
         if (usage->type == EV_KEY || usage->type == EV_ABS)
-                clear_bit(usage->code, *bit);
-
-        return 0;
+                set_bit(usage->type, hi->input->evbit);
+        return -1;
 }
 
 /*
@@ -108,58 +126,16 @@ static int egalax_input_mapped(struct hid_device *hdev, struct hid_input *hi,
  */
 static void egalax_filter_event(struct egalax_data *td, struct input_dev *input)
 {
-        td->first = !td->first; /* touchscreen emulation */
-
-        if (td->valid) {
-                /* emit multitouch events */
-                input_event(input, EV_ABS, ABS_MT_TRACKING_ID, td->id);
-                input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x >> 3);
-                input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y >> 3);
+        input_mt_slot(input, td->slot);
+        input_mt_report_slot_state(input, MT_TOOL_FINGER, td->touch);
+        if (td->touch) {
+                input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x);
+                input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y);
                 input_event(input, EV_ABS, ABS_MT_PRESSURE, td->z);
-
-                input_mt_sync(input);
-
-                /*
-                 * touchscreen emulation: store (x, y) as
-                 * the last valid values in this frame
-                 */
-                td->lastx = td->x;
-                td->lasty = td->y;
-                td->lastz = td->z;
-        }
-
-        /*
-         * touchscreen emulation: if this is the second finger and at least
-         * one in this frame is valid, the latest valid in the frame is
-         * the oldest on the panel, the one we want for single touch
-         */
-        if (!td->first && td->activity) {
-                input_event(input, EV_ABS, ABS_X, td->lastx >> 3);
-                input_event(input, EV_ABS, ABS_Y, td->lasty >> 3);
-                input_event(input, EV_ABS, ABS_PRESSURE, td->lastz);
-        }
-
-        if (!td->valid) {
-                /*
-                 * touchscreen emulation: if the first finger is invalid
-                 * and there previously was finger activity, this is a release
-                 */ 
-                if (td->first && td->activity) {
-                        input_event(input, EV_KEY, BTN_TOUCH, 0);
-                        td->activity = false;
-                }
-                return;
-        }
-
-
-        /* touchscreen emulation: if no previous activity, emit touch event */
-        if (!td->activity) {
-                input_event(input, EV_KEY, BTN_TOUCH, 1);
-                td->activity = true;
         }
+        input_mt_report_pointer_emulation(input, true);
 }
 
-
 static int egalax_event(struct hid_device *hid, struct hid_field *field,
                                 struct hid_usage *usage, __s32 value)
 {
@@ -169,25 +145,26 @@ static int egalax_event(struct hid_device *hid, struct hid_field *field,
          * uses a standard parallel multitouch protocol (product ID ==
          * 48xx).  The second is capacitive and uses an unusual "serial"
          * protocol with a different message for each multitouch finger
-         * (product ID == 72xx).  We do not yet generate a correct event
-         * sequence for the capacitive/serial protocol.
+         * (product ID == 72xx).
          */
         if (hid->claimed & HID_CLAIMED_INPUT) {
                 struct input_dev *input = field->hidinput->input;
 
                 switch (usage->hid) {
                 case HID_DG_INRANGE:
+                        td->valid = value;
+                        break;
                 case HID_DG_CONFIDENCE:
                         /* avoid interference from generic hidinput handling */
                         break;
                 case HID_DG_TIPSWITCH:
-                        td->valid = value;
+                        td->touch = value;
                         break;
                 case HID_DG_TIPPRESSURE:
                         td->z = value;
                         break;
                 case HID_DG_CONTACTID:
-                        td->id = value;
+                        td->slot = clamp_val(value, 0, MAX_SLOTS - 1);
                         break;
                 case HID_GD_X:
                         td->x = value;
@@ -195,11 +172,11 @@ static int egalax_event(struct hid_device *hid, struct hid_field *field,
                 case HID_GD_Y:
                         td->y = value;
                         /* this is the last field in a finger */
-                        egalax_filter_event(td, input);
+                        if (td->valid)
+                                egalax_filter_event(td, input);
                         break;
                 case HID_DG_CONTACTCOUNT:
                         /* touch emulation: this is the last field in a frame */
-                        td->first = false;
                         break;
 
                 default:
@@ -261,6 +238,12 @@ static const struct hid_device_id egalax_devices[] = {
                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH) },
         { HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH1) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
+                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH2) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
+                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH3) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
+                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4) },
         { }
 };
 MODULE_DEVICE_TABLE(hid, egalax_devices);