[PATCH 0/5] Migrations to hid-multitouch, round 3

[PATCH 0/5] Migrations to hid-multitouch, round 3

[Benjamin Tissoires]

Hi guys,

This is the third version for this patch series.

Since last time, I mainly modified the patch #1 to adapt
Henrik's comments. I also added #4 as the code path was confusing.

Cheers,
Benjamin

[PATCH v3 1/5] hid-multitouch: Auto detection of maxcontacts

[Benjamin Tissoires]

This patch enables support of autodetection of maxcontacts.
When adding support for a new device, one is now able to let
the device tell how many contacts it supports, or to manually
set the value if the device happens to provide wrong information.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-by: Stéphane Chatty <chatty@enac.fr>
---

changes since v2:
* reverted "if (td->mtclass->maxcontacts)" test
* reverted MT_DEFAULT_MAXCONTACT
* add a test on td->slots before kzalloc
* remove device in case td->slots was not allocated

 drivers/hid/hid-multitouch.c |   52 +++++++++++++++++++++++++++++------------
 1 files changed, 37 insertions(+), 15 deletions(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index ee01e65..b9f9eec 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -60,8 +60,9 @@ struct mt_device {
 	__s8 inputmode;		/* InputMode HID feature, -1 if non-existent */
 	__u8 num_received;	/* how many contacts we received */
 	__u8 num_expected;	/* expected last contact index */
+	__u8 maxcontacts;
 	bool curvalid;		/* is the current contact valid? */
-	struct mt_slot slots[0];	/* first slot */
+	struct mt_slot *slots;
 };
 
 struct mt_class {
@@ -79,6 +80,8 @@ struct mt_class {
 #define MT_CLS_CYPRESS				4
 #define MT_CLS_EGALAX				5
 
+#define MT_DEFAULT_MAXCONTACT	10
+
 /*
  * these device-dependent functions determine what slot corresponds
  * to a valid contact that was just read.
@@ -95,12 +98,12 @@ static int cypress_compute_slot(struct mt_device *td)
 static int find_slot_from_contactid(struct mt_device *td)
 {
 	int i;
-	for (i = 0; i < td->mtclass->maxcontacts; ++i) {
+	for (i = 0; i < td->maxcontacts; ++i) {
 		if (td->slots[i].contactid == td->curdata.contactid &&
 			td->slots[i].touch_state)
 			return i;
 	}
-	for (i = 0; i < td->mtclass->maxcontacts; ++i) {
+	for (i = 0; i < td->maxcontacts; ++i) {
 		if (!td->slots[i].seen_in_this_frame &&
 			!td->slots[i].touch_state)
 			return i;
@@ -113,8 +116,7 @@ static int find_slot_from_contactid(struct mt_device *td)
 
 struct mt_class mt_classes[] = {
 	{ .name = MT_CLS_DEFAULT,
-		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
-		.maxcontacts = 10 },
+		.quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 	{ .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 		.quirks = MT_QUIRK_VALID_IS_INRANGE |
 			MT_QUIRK_SLOT_IS_CONTACTID,
@@ -142,9 +144,19 @@ struct mt_class mt_classes[] = {
 static void mt_feature_mapping(struct hid_device *hdev,
 		struct hid_field *field, struct hid_usage *usage)
 {
-	if (usage->hid == HID_DG_INPUTMODE) {
-		struct mt_device *td = hid_get_drvdata(hdev);
+	struct mt_device *td = hid_get_drvdata(hdev);
+
+	switch (usage->hid) {
+	case HID_DG_INPUTMODE:
 		td->inputmode = field->report->id;
+		break;
+	case HID_DG_CONTACTMAX:
+		td->maxcontacts = field->value[0];
+		if (td->mtclass->maxcontacts)
+			/* check if the maxcontacts is given by the class */
+			td->maxcontacts = td->mtclass->maxcontacts;
+
+		break;
 	}
 }
 
@@ -208,8 +220,7 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 			td->last_slot_field = usage->hid;
 			return 1;
 		case HID_DG_CONTACTID:
-			input_mt_init_slots(hi->input,
-					td->mtclass->maxcontacts);
+			input_mt_init_slots(hi->input, td->maxcontacts);
 			td->last_slot_field = usage->hid;
 			return 1;
 		case HID_DG_WIDTH:
@@ -292,7 +303,7 @@ static void mt_complete_slot(struct mt_device *td)
 	if (td->curvalid) {
 		int slotnum = mt_compute_slot(td);
 
-		if (slotnum >= 0 && slotnum < td->mtclass->maxcontacts)
+		if (slotnum >= 0 && slotnum < td->maxcontacts)
 			td->slots[slotnum] = td->curdata;
 	}
 	td->num_received++;
@@ -307,7 +318,7 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input)
 {
 	int i;
 
-	for (i = 0; i < td->mtclass->maxcontacts; ++i) {
+	for (i = 0; i < td->maxcontacts; ++i) {
 		struct mt_slot *s = &(td->slots[i]);
 		if ((td->mtclass->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
 			!s->seen_in_this_frame) {
@@ -341,7 +352,7 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
 	struct mt_device *td = hid_get_drvdata(hid);
 	__s32 quirks = td->mtclass->quirks;
 
-	if (hid->claimed & HID_CLAIMED_INPUT) {
+	if (hid->claimed & HID_CLAIMED_INPUT && td->slots) {
 		switch (usage->hid) {
 		case HID_DG_INRANGE:
 			if (quirks & MT_QUIRK_VALID_IS_INRANGE)
@@ -442,9 +453,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	 */
 	hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
 
-	td = kzalloc(sizeof(struct mt_device) +
-				mtclass->maxcontacts * sizeof(struct mt_slot),
-				GFP_KERNEL);
+	td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
 	if (!td) {
 		dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 		return -ENOMEM;
@@ -461,6 +470,18 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	if (ret)
 		goto fail;
 
+	if (!td->maxcontacts)
+		td->maxcontacts = MT_DEFAULT_MAXCONTACT;
+
+	td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot),
+				GFP_KERNEL);
+	if (!td->slots) {
+		dev_err(&hdev->dev, "cannot allocate multitouch slots\n");
+		hid_hw_stop(hdev);
+		ret = -ENOMEM;
+		goto fail;
+	}
+
 	mt_set_input_mode(hdev);
 
 	return 0;
@@ -482,6 +503,7 @@ static void mt_remove(struct hid_device *hdev)
 {
 	struct mt_device *td = hid_get_drvdata(hdev);
 	hid_hw_stop(hdev);
+	kfree(td->slots);
 	kfree(td);
 	hid_set_drvdata(hdev, NULL);
 }
-- 
1.7.4

[PATCH v3 2/5] hid-multitouch: migrate support for Stantum panels to the unified driver.

[Benjamin Tissoires]

This patch merges hid-stantum to the generic multitouch driver.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-by: Stéphane Chatty <chatty@enac.fr>
---

no changes since v2

 drivers/hid/Kconfig          |    7 +-
 drivers/hid/Makefile         |    1 -
 drivers/hid/hid-multitouch.c |   15 +++
 drivers/hid/hid-stantum.c    |  286 ------------------------------------------
 4 files changed, 16 insertions(+), 293 deletions(-)
 delete mode 100644 drivers/hid/hid-stantum.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 54b9fe6..b8a81c4 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -322,6 +322,7 @@ config HID_MULTITOUCH
 	  - 'Sensing Win7-TwoFinger' panel by GeneralTouch
           - eGalax dual-touch panels, including the
 	    Joojoo and Wetab tablets
+	  - Stantum multitouch panels
 
 	  If unsure, say N.
 
@@ -488,12 +489,6 @@ config HID_SONY
 	---help---
 	Support for Sony PS3 controller.
 
-config HID_STANTUM
-	tristate "Stantum multitouch panel"
-	depends on USB_HID
-	---help---
-	Support for Stantum multitouch panel.
-
 config HID_SUNPLUS
 	tristate "Sunplus wireless desktop"
 	depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index e904643..e568067 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -66,7 +66,6 @@ obj-$(CONFIG_HID_ROCCAT_PYRA)	+= hid-roccat-pyra.o
 obj-$(CONFIG_HID_SAMSUNG)	+= hid-samsung.o
 obj-$(CONFIG_HID_SMARTJOYPLUS)	+= hid-sjoy.o
 obj-$(CONFIG_HID_SONY)		+= hid-sony.o
-obj-$(CONFIG_HID_STANTUM)	+= hid-stantum.o
 obj-$(CONFIG_HID_SUNPLUS)	+= hid-sunplus.o
 obj-$(CONFIG_HID_GREENASIA)	+= hid-gaff.o
 obj-$(CONFIG_HID_THRUSTMASTER)	+= hid-tmff.o
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index b9f9eec..5983e55 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -79,6 +79,7 @@ struct mt_class {
 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER	3
 #define MT_CLS_CYPRESS				4
 #define MT_CLS_EGALAX				5
+#define MT_CLS_STANTUM				6
 
 #define MT_DEFAULT_MAXCONTACT	10
 
@@ -138,6 +139,9 @@ struct mt_class mt_classes[] = {
 		.sn_move = 4096,
 		.sn_pressure = 32,
 	},
+	{ .name = MT_CLS_STANTUM,
+		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
+
 	{ }
 };
 
@@ -552,6 +556,17 @@ static const struct hid_device_id mt_devices[] = {
 		HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 			USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH4) },
 
+	/* Stantum panels */
+	{ .driver_data = MT_CLS_STANTUM,
+		HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
+			USB_DEVICE_ID_MTP)},
+	{ .driver_data = MT_CLS_STANTUM,
+		HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
+			USB_DEVICE_ID_MTP_STM)},
+	{ .driver_data = MT_CLS_STANTUM,
+		HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
+			USB_DEVICE_ID_MTP_SITRONIX)},
+
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, mt_devices);
diff --git a/drivers/hid/hid-stantum.c b/drivers/hid/hid-stantum.c
deleted file mode 100644
index b2be1d1..0000000
--- a/drivers/hid/hid-stantum.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/*
- *  HID driver for Stantum multitouch panels
- *
- *  Copyright (c) 2009 Stephane Chatty <chatty@enac.fr>
- *
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- */
-
-#include <linux/device.h>
-#include <linux/hid.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-
-MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
-MODULE_DESCRIPTION("Stantum HID multitouch panels");
-MODULE_LICENSE("GPL");
-
-#include "hid-ids.h"
-
-struct stantum_data {
-	__s32 x, y, z, w, h;	/* x, y, pressure, width, height */
-	__u16 id;		/* touch id */
-	bool valid;		/* valid finger data, or just placeholder? */
-	bool first;		/* first finger in the HID packet? */
-	bool activity;		/* at least one active finger so far? */
-};
-
-static int stantum_input_mapping(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
-{
-	switch (usage->hid & HID_USAGE_PAGE) {
-
-	case HID_UP_GENDESK:
-		switch (usage->hid) {
-		case HID_GD_X:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_X);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_X,
-						field->logical_minimum,
-						field->logical_maximum, 0, 0);
-			return 1;
-		case HID_GD_Y:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_Y);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_Y,
-						field->logical_minimum,
-						field->logical_maximum, 0, 0);
-			return 1;
-		}
-		return 0;
-
-	case HID_UP_DIGITIZER:
-		switch (usage->hid) {
-		case HID_DG_INRANGE:
-		case HID_DG_CONFIDENCE:
-		case HID_DG_INPUTMODE:
-		case HID_DG_DEVICEINDEX:
-		case HID_DG_CONTACTCOUNT:
-		case HID_DG_CONTACTMAX:
-			return -1;
-
-		case HID_DG_TIPSWITCH:
-			/* touchscreen emulation */
-			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
-			return 1;
-
-		case HID_DG_WIDTH:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MAJOR);
-			return 1;
-		case HID_DG_HEIGHT:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MINOR);
-			input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
-					1, 1, 0, 0);
-			return 1;
-		case HID_DG_TIPPRESSURE:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_PRESSURE);
-			return 1;
-
-		case HID_DG_CONTACTID:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TRACKING_ID);
-			return 1;
-
-		}
-		return 0;
-
-	case 0xff000000:
-		/* no input-oriented meaning */
-		return -1;
-	}
-
-	return 0;
-}
-
-static int stantum_input_mapped(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
-{
-	if (usage->type == EV_KEY || usage->type == EV_ABS)
-		clear_bit(usage->code, *bit);
-
-	return 0;
-}
-
-/*
- * this function is called when a whole finger has been parsed,
- * so that it can decide what to send to the input layer.
- */
-static void stantum_filter_event(struct stantum_data *sd,
-					struct input_dev *input)
-{
-	bool wide;
-
-	if (!sd->valid) {
-		/*
-		 * touchscreen emulation: if the first finger is not valid and
-		 * there previously was finger activity, this is a release
-		 */
-		if (sd->first && sd->activity) {
-			input_event(input, EV_KEY, BTN_TOUCH, 0);
-			sd->activity = false;
-		}
-		return;
-	}
-
-	input_event(input, EV_ABS, ABS_MT_TRACKING_ID, sd->id);
-	input_event(input, EV_ABS, ABS_MT_POSITION_X, sd->x);
-	input_event(input, EV_ABS, ABS_MT_POSITION_Y, sd->y);
-
-	wide = (sd->w > sd->h);
-	input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
-	input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, wide ? sd->w : sd->h);
-	input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, wide ? sd->h : sd->w);
-
-	input_event(input, EV_ABS, ABS_MT_PRESSURE, sd->z);
-
-	input_mt_sync(input);
-	sd->valid = false;
-
-	/* touchscreen emulation */
-	if (sd->first) {
-		if (!sd->activity) {
-			input_event(input, EV_KEY, BTN_TOUCH, 1);
-			sd->activity = true;
-		}
-		input_event(input, EV_ABS, ABS_X, sd->x);
-		input_event(input, EV_ABS, ABS_Y, sd->y);
-	}
-	sd->first = false;
-}
-
-
-static int stantum_event(struct hid_device *hid, struct hid_field *field,
-				struct hid_usage *usage, __s32 value)
-{
-	struct stantum_data *sd = hid_get_drvdata(hid);
-
-	if (hid->claimed & HID_CLAIMED_INPUT) {
-		struct input_dev *input = field->hidinput->input;
-
-		switch (usage->hid) {
-		case HID_DG_INRANGE:
-			/* this is the last field in a finger */
-			stantum_filter_event(sd, input);
-			break;
-		case HID_DG_WIDTH:
-			sd->w = value;
-			break;
-		case HID_DG_HEIGHT:
-			sd->h = value;
-			break;
-		case HID_GD_X:
-			sd->x = value;
-			break;
-		case HID_GD_Y:
-			sd->y = value;
-			break;
-		case HID_DG_TIPPRESSURE:
-			sd->z = value;
-			break;
-		case HID_DG_CONTACTID:
-			sd->id = value;
-			break;
-		case HID_DG_CONFIDENCE:
-			sd->valid = !!value;
-			break;
-		case 0xff000002:
-			/* this comes only before the first finger */
-			sd->first = true;
-			break;
-
-		default:
-			/* ignore the others */
-			return 1;
-		}
-	}
-
-	/* we have handled the hidinput part, now remains hiddev */
-	if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
-		hid->hiddev_hid_event(hid, field, usage, value);
-
-	return 1;
-}
-
-static int stantum_probe(struct hid_device *hdev,
-				const struct hid_device_id *id)
-{
-	int ret;
-	struct stantum_data *sd;
-
-	sd = kmalloc(sizeof(struct stantum_data), GFP_KERNEL);
-	if (!sd) {
-		hid_err(hdev, "cannot allocate Stantum data\n");
-		return -ENOMEM;
-	}
-	sd->valid = false;
-	sd->first = false;
-	sd->activity = false;
-	hid_set_drvdata(hdev, sd);
-
-	ret = hid_parse(hdev);
-	if (!ret)
-		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
-
-	if (ret)
-		kfree(sd);
-
-	return ret;
-}
-
-static void stantum_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-	kfree(hid_get_drvdata(hdev));
-	hid_set_drvdata(hdev, NULL);
-}
-
-static const struct hid_device_id stantum_devices[] = {
-	{ HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, USB_DEVICE_ID_MTP) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, USB_DEVICE_ID_MTP_STM) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX, USB_DEVICE_ID_MTP_SITRONIX) },
-	{ }
-};
-MODULE_DEVICE_TABLE(hid, stantum_devices);
-
-static const struct hid_usage_id stantum_grabbed_usages[] = {
-	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
-	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
-};
-
-static struct hid_driver stantum_driver = {
-	.name = "stantum",
-	.id_table = stantum_devices,
-	.probe = stantum_probe,
-	.remove = stantum_remove,
-	.input_mapping = stantum_input_mapping,
-	.input_mapped = stantum_input_mapped,
-	.usage_table = stantum_grabbed_usages,
-	.event = stantum_event,
-};
-
-static int __init stantum_init(void)
-{
-	return hid_register_driver(&stantum_driver);
-}
-
-static void __exit stantum_exit(void)
-{
-	hid_unregister_driver(&stantum_driver);
-}
-
-module_init(stantum_init);
-module_exit(stantum_exit);
-
-- 
1.7.4

[PATCH v3 3/5] hid-multitouch: migrate Cando dual touch panels to hid-multitouch

[Benjamin Tissoires]

This patch merges hid-cando into the unified multitouch driver.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-by: Stéphane Chatty <chatty@enac.fr>
---

no changes since v2

 drivers/hid/Kconfig          |    7 +-
 drivers/hid/Makefile         |    1 -
 drivers/hid/hid-cando.c      |  276 ------------------------------------------
 drivers/hid/hid-multitouch.c |   14 ++
 4 files changed, 15 insertions(+), 283 deletions(-)
 delete mode 100644 drivers/hid/hid-cando.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index b8a81c4..fa1fa5f 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -100,12 +100,6 @@ config HID_BELKIN
 	---help---
 	Support for Belkin Flip KVM and Wireless keyboard.
 
-config HID_CANDO
-	tristate "Cando dual touch panel"
-	depends on USB_HID
-	---help---
-	Support for Cando dual touch panel.
-
 config HID_CHERRY
 	tristate "Cherry Cymotion keyboard" if EMBEDDED
 	depends on USB_HID
@@ -315,6 +309,7 @@ config HID_MULTITOUCH
 	  Generic support for HID multitouch panels.
 
 	  Say Y here if you have one of the following devices:
+	  - Cando dual touch panel
 	  - Cypress TrueTouch panels
 	  - Hanvon dual touch panels
 	  - IrTouch Infrared USB panels
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index e568067..193d5fc 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -30,7 +30,6 @@ obj-$(CONFIG_HID_A4TECH)	+= hid-a4tech.o
 obj-$(CONFIG_HID_ACRUX)		+= hid-axff.o
 obj-$(CONFIG_HID_APPLE)		+= hid-apple.o
 obj-$(CONFIG_HID_BELKIN)	+= hid-belkin.o
-obj-$(CONFIG_HID_CANDO)		+= hid-cando.o
 obj-$(CONFIG_HID_CHERRY)	+= hid-cherry.o
 obj-$(CONFIG_HID_CHICONY)	+= hid-chicony.o
 obj-$(CONFIG_HID_CYPRESS)	+= hid-cypress.o
diff --git a/drivers/hid/hid-cando.c b/drivers/hid/hid-cando.c
deleted file mode 100644
index 1ea066c..0000000
--- a/drivers/hid/hid-cando.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/*
- *  HID driver for Cando dual-touch panels
- *
- *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
- *
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- */
-
-#include <linux/device.h>
-#include <linux/hid.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-
-MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
-MODULE_DESCRIPTION("Cando dual-touch panel");
-MODULE_LICENSE("GPL");
-
-#include "hid-ids.h"
-
-struct cando_data {
-	__u16 x, y;
-	__u8 id;
-	__s8 oldest;		/* id of the oldest finger in previous frame */
-	bool valid;		/* valid finger data, or just placeholder? */
-	bool first;		/* is this the first finger in this frame? */
-	__s8 firstid;		/* id of the first finger in the frame */
-	__u16 firstx, firsty;	/* (x, y) of the first finger in the frame */
-};
-
-static int cando_input_mapping(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
-{
-	switch (usage->hid & HID_USAGE_PAGE) {
-
-	case HID_UP_GENDESK:
-		switch (usage->hid) {
-		case HID_GD_X:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_X);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_X,
-						field->logical_minimum,
-						field->logical_maximum, 0, 0);
-			return 1;
-		case HID_GD_Y:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_Y);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_Y,
-						field->logical_minimum,
-						field->logical_maximum, 0, 0);
-			return 1;
-		}
-		return 0;
-
-	case HID_UP_DIGITIZER:
-		switch (usage->hid) {
-		case HID_DG_TIPSWITCH:
-		case HID_DG_CONTACTMAX:
-			return -1;
-		case HID_DG_INRANGE:
-			/* touchscreen emulation */
-			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
-			return 1;
-		case HID_DG_CONTACTID:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TRACKING_ID);
-			return 1;
-		}
-		return 0;
-	}
-
-	return 0;
-}
-
-static int cando_input_mapped(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
-{
-	if (usage->type == EV_KEY || usage->type == EV_ABS)
-		clear_bit(usage->code, *bit);
-
-	return 0;
-}
-
-/*
- * this function is called when a whole finger has been parsed,
- * so that it can decide what to send to the input layer.
- */
-static void cando_filter_event(struct cando_data *td, struct input_dev *input)
-{
-	td->first = !td->first; /* touchscreen emulation */
-
-	if (!td->valid) {
-		/*
-		 * touchscreen emulation: if this is the second finger and
-		 * the first was valid, the first was the oldest; if the
-		 * first was not valid and there was a valid finger in the
-		 * previous frame, this is a release.
-		 */
-		if (td->first) {
-			td->firstid = -1;
-		} else if (td->firstid >= 0) {
-			input_event(input, EV_ABS, ABS_X, td->firstx);
-			input_event(input, EV_ABS, ABS_Y, td->firsty);
-			td->oldest = td->firstid;
-		} else if (td->oldest >= 0) {
-			input_event(input, EV_KEY, BTN_TOUCH, 0);
-			td->oldest = -1;
-		}
-
-		return;
-	}
-	
-	input_event(input, EV_ABS, ABS_MT_TRACKING_ID, td->id);
-	input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x);
-	input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y);
-
-	input_mt_sync(input);
-
-	/*
-	 * touchscreen emulation: if there was no touching finger previously,
-	 * emit touch event
-	 */
-	if (td->oldest < 0) {
-		input_event(input, EV_KEY, BTN_TOUCH, 1);
-		td->oldest = td->id;
-	}
-
-	/*
-	 * touchscreen emulation: if this is the first finger, wait for the
-	 * second; the oldest is then the second if it was the oldest already
-	 * or if there was no first, the first otherwise.
-	 */
-	if (td->first) {
-		td->firstx = td->x;
-		td->firsty = td->y;
-		td->firstid = td->id;
-	} else {
-		int x, y, oldest;
-		if (td->id == td->oldest || td->firstid < 0) {
-			x = td->x;
-			y = td->y;
-			oldest = td->id;
-		} else {
-			x = td->firstx;
-			y = td->firsty;
-			oldest = td->firstid;
-		}
-		input_event(input, EV_ABS, ABS_X, x);
-		input_event(input, EV_ABS, ABS_Y, y);
-		td->oldest = oldest;
-	}
-}
-
-
-static int cando_event(struct hid_device *hid, struct hid_field *field,
-				struct hid_usage *usage, __s32 value)
-{
-	struct cando_data *td = hid_get_drvdata(hid);
-
-	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_CONTACTID:
-			td->id = value;
-			break;
-		case HID_GD_X:
-			td->x = value;
-			break;
-		case HID_GD_Y:
-			td->y = value;
-			cando_filter_event(td, input);
-			break;
-		case HID_DG_TIPSWITCH:
-			/* avoid interference from generic hidinput handling */
-			break;
-
-		default:
-			/* fallback to the generic hidinput handling */
-			return 0;
-		}
-	}
-
-	/* we have handled the hidinput part, now remains hiddev */
-	if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
-		hid->hiddev_hid_event(hid, field, usage, value);
-
-	return 1;
-}
-
-static int cando_probe(struct hid_device *hdev, const struct hid_device_id *id)
-{
-	int ret;
-	struct cando_data *td;
-
-	td = kmalloc(sizeof(struct cando_data), GFP_KERNEL);
-	if (!td) {
-		hid_err(hdev, "cannot allocate Cando Touch data\n");
-		return -ENOMEM;
-	}
-	hid_set_drvdata(hdev, td);
-	td->first = false;
-	td->oldest = -1;
-	td->valid = false;
-
-	ret = hid_parse(hdev);
-	if (!ret)
-		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
-
-	if (ret)
-		kfree(td);
-
-	return ret;
-}
-
-static void cando_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-	kfree(hid_get_drvdata(hdev));
-	hid_set_drvdata(hdev, NULL);
-}
-
-static const struct hid_device_id cando_devices[] = {
-	{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
-			USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
-			USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
-			USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
-		USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
-	{ }
-};
-MODULE_DEVICE_TABLE(hid, cando_devices);
-
-static const struct hid_usage_id cando_grabbed_usages[] = {
-	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
-	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
-};
-
-static struct hid_driver cando_driver = {
-	.name = "cando-touch",
-	.id_table = cando_devices,
-	.probe = cando_probe,
-	.remove = cando_remove,
-	.input_mapping = cando_input_mapping,
-	.input_mapped = cando_input_mapped,
-	.usage_table = cando_grabbed_usages,
-	.event = cando_event,
-};
-
-static int __init cando_init(void)
-{
-	return hid_register_driver(&cando_driver);
-}
-
-static void __exit cando_exit(void)
-{
-	hid_unregister_driver(&cando_driver);
-}
-
-module_init(cando_init);
-module_exit(cando_exit);
-
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 5983e55..e6e1ea2 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -514,6 +514,20 @@ static void mt_remove(struct hid_device *hdev)
 
 static const struct hid_device_id mt_devices[] = {
 
+	/* Cando panels */
+	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
+		HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
+			USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
+	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
+		HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
+			USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
+	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
+		HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
+			USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
+	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
+		HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
+			USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
+
 	/* Cypress panel */
 	{ .driver_data = MT_CLS_CYPRESS,
 		HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
-- 
1.7.4

[PATCH v3 4/5] hid-multitouch: refactor initialization of ABS_MT_ORIENTATION

[Benjamin Tissoires]

No semantic changes, it's just easier to read the code.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-by: Stéphane Chatty <chatty@enac.fr>
---

new in v3

 drivers/hid/hid-multitouch.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index e6e1ea2..d31301e 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -235,9 +235,8 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 		case HID_DG_HEIGHT:
 			hid_map_usage(hi, usage, bit, max,
 					EV_ABS, ABS_MT_TOUCH_MINOR);
-			field->logical_maximum = 1;
-			field->logical_minimum = 0;
-			set_abs(hi->input, ABS_MT_ORIENTATION, field, 0);
+			input_set_abs_params(hi->input,
+					ABS_MT_ORIENTATION, 0, 1, 0, 0);
 			td->last_slot_field = usage->hid;
 			return 1;
 		case HID_DG_TIPPRESSURE:
-- 
1.7.4

[PATCH v3 5/5] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Benjamin Tissoires]

This patch merges the hid-3m-pct driver into hid-multitouch.
To keep devices working the same way they used to with hid-3m-pct,
we need to add two signal/noise ratios for width and height.
We also need to work on width/height to send proper
ABS_MT_ORIENTATION flag.

Importing 3M into hid-multitouch also solved the bug in which
devices handling width and height in their report descriptors
did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-by: Stéphane Chatty <chatty@enac.fr>
---

no changes since v2

 drivers/hid/Kconfig          |    7 +-
 drivers/hid/Makefile         |    1 -
 drivers/hid/hid-3m-pct.c     |  305 ------------------------------------------
 drivers/hid/hid-multitouch.c |   38 +++++-
 4 files changed, 37 insertions(+), 314 deletions(-)
 delete mode 100644 drivers/hid/hid-3m-pct.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index fa1fa5f..5498008 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -55,12 +55,6 @@ source "drivers/hid/usbhid/Kconfig"
 menu "Special HID drivers"
 	depends on HID
 
-config HID_3M_PCT
-	tristate "3M PCT touchscreen"
-	depends on USB_HID
-	---help---
-	Support for 3M PCT touch screens.
-
 config HID_A4TECH
 	tristate "A4 tech mice" if EMBEDDED
 	depends on USB_HID
@@ -309,6 +303,7 @@ config HID_MULTITOUCH
 	  Generic support for HID multitouch panels.
 
 	  Say Y here if you have one of the following devices:
+	  - 3M PCT touch screens
 	  - Cando dual touch panel
 	  - Cypress TrueTouch panels
 	  - Hanvon dual touch panels
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 193d5fc..f8edea3 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -25,7 +25,6 @@ ifdef CONFIG_LOGIWII_FF
 	hid-logitech-y	+= hid-lg4ff.o
 endif
 
-obj-$(CONFIG_HID_3M_PCT)	+= hid-3m-pct.o
 obj-$(CONFIG_HID_A4TECH)	+= hid-a4tech.o
 obj-$(CONFIG_HID_ACRUX)		+= hid-axff.o
 obj-$(CONFIG_HID_APPLE)		+= hid-apple.o
diff --git a/drivers/hid/hid-3m-pct.c b/drivers/hid/hid-3m-pct.c
deleted file mode 100644
index 5243ae2..0000000
--- a/drivers/hid/hid-3m-pct.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/*
- *  HID driver for 3M PCT multitouch panels
- *
- *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
- *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
- *  Copyright (c) 2010      Canonical, Ltd.
- *
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- */
-
-#include <linux/device.h>
-#include <linux/hid.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/input/mt.h>
-
-MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
-MODULE_DESCRIPTION("3M PCT multitouch panels");
-MODULE_LICENSE("GPL");
-
-#include "hid-ids.h"
-
-#define MAX_SLOTS		60
-
-/* estimated signal-to-noise ratios */
-#define SN_MOVE			2048
-#define SN_WIDTH		128
-
-struct mmm_finger {
-	__s32 x, y, w, h;
-	bool touch, valid;
-};
-
-struct mmm_data {
-	struct mmm_finger f[MAX_SLOTS];
-	__u8 curid;
-	__u8 nexp, nreal;
-	bool touch, valid;
-};
-
-static int mmm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
-{
-	int f1 = field->logical_minimum;
-	int f2 = field->logical_maximum;
-	int df = f2 - f1;
-
-	switch (usage->hid & HID_USAGE_PAGE) {
-
-	case HID_UP_BUTTON:
-		return -1;
-
-	case HID_UP_GENDESK:
-		switch (usage->hid) {
-		case HID_GD_X:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_X);
-			input_set_abs_params(hi->input, ABS_MT_POSITION_X,
-					     f1, f2, df / SN_MOVE, 0);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_X,
-					     f1, f2, df / SN_MOVE, 0);
-			return 1;
-		case HID_GD_Y:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_Y);
-			input_set_abs_params(hi->input, ABS_MT_POSITION_Y,
-					     f1, f2, df / SN_MOVE, 0);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_Y,
-					     f1, f2, df / SN_MOVE, 0);
-			return 1;
-		}
-		return 0;
-
-	case HID_UP_DIGITIZER:
-		switch (usage->hid) {
-		/* we do not want to map these: no input-oriented meaning */
-		case 0x14:
-		case 0x23:
-		case HID_DG_INPUTMODE:
-		case HID_DG_DEVICEINDEX:
-		case HID_DG_CONTACTCOUNT:
-		case HID_DG_CONTACTMAX:
-		case HID_DG_INRANGE:
-		case HID_DG_CONFIDENCE:
-			return -1;
-		case HID_DG_TIPSWITCH:
-			/* touchscreen emulation */
-			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
-			input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
-			return 1;
-		case HID_DG_WIDTH:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MAJOR);
-			input_set_abs_params(hi->input, ABS_MT_TOUCH_MAJOR,
-					     f1, f2, df / SN_WIDTH, 0);
-			return 1;
-		case HID_DG_HEIGHT:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MINOR);
-			input_set_abs_params(hi->input, ABS_MT_TOUCH_MINOR,
-					     f1, f2, df / SN_WIDTH, 0);
-			input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
-					0, 1, 0, 0);
-			return 1;
-		case HID_DG_CONTACTID:
-			input_mt_init_slots(hi->input, MAX_SLOTS);
-			return 1;
-		}
-		/* let hid-input decide for the others */
-		return 0;
-
-	case 0xff000000:
-		/* we do not want to map these: no input-oriented meaning */
-		return -1;
-	}
-
-	return 0;
-}
-
-static int mmm_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)
-		set_bit(usage->type, hi->input->evbit);
-	return -1;
-}
-
-/*
- * this function is called when a whole packet has been received and processed,
- * so that it can decide what to send to the input layer.
- */
-static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
-{
-	int i;
-	for (i = 0; i < MAX_SLOTS; ++i) {
-		struct mmm_finger *f = &md->f[i];
-		if (!f->valid) {
-			/* this finger is just placeholder data, ignore */
-			continue;
-		}
-		input_mt_slot(input, i);
-		input_mt_report_slot_state(input, MT_TOOL_FINGER, f->touch);
-		if (f->touch) {
-			/* this finger is on the screen */
-			int wide = (f->w > f->h);
-			/* divided by two to match visual scale of touch */
-			int major = max(f->w, f->h) >> 1;
-			int minor = min(f->w, f->h) >> 1;
-
-			input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
-			input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
-			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
-		}
-		f->valid = 0;
-	}
-
-	input_mt_report_pointer_emulation(input, true);
-	input_sync(input);
-}
-
-/*
- * this function is called upon all reports
- * so that we can accumulate contact point information,
- * and call input_mt_sync after each point.
- */
-static int mmm_event(struct hid_device *hid, struct hid_field *field,
-				struct hid_usage *usage, __s32 value)
-{
-	struct mmm_data *md = hid_get_drvdata(hid);
-	/*
-	 * strangely, this function can be called before
-	 * field->hidinput is initialized!
-	 */
-	if (hid->claimed & HID_CLAIMED_INPUT) {
-		struct input_dev *input = field->hidinput->input;
-		switch (usage->hid) {
-		case HID_DG_TIPSWITCH:
-			md->touch = value;
-			break;
-		case HID_DG_CONFIDENCE:
-			md->valid = value;
-			break;
-		case HID_DG_WIDTH:
-			if (md->valid)
-				md->f[md->curid].w = value;
-			break;
-		case HID_DG_HEIGHT:
-			if (md->valid)
-				md->f[md->curid].h = value;
-			break;
-		case HID_DG_CONTACTID:
-			value = clamp_val(value, 0, MAX_SLOTS - 1);
-			if (md->valid) {
-				md->curid = value;
-				md->f[value].touch = md->touch;
-				md->f[value].valid = 1;
-				md->nreal++;
-			}
-			break;
-		case HID_GD_X:
-			if (md->valid)
-				md->f[md->curid].x = value;
-			break;
-		case HID_GD_Y:
-			if (md->valid)
-				md->f[md->curid].y = value;
-			break;
-		case HID_DG_CONTACTCOUNT:
-			if (value)
-				md->nexp = value;
-			if (md->nreal >= md->nexp) {
-				mmm_filter_event(md, input);
-				md->nreal = 0;
-			}
-			break;
-		}
-	}
-
-	/* we have handled the hidinput part, now remains hiddev */
-	if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
-		hid->hiddev_hid_event(hid, field, usage, value);
-
-	return 1;
-}
-
-static int mmm_probe(struct hid_device *hdev, const struct hid_device_id *id)
-{
-	int ret;
-	struct mmm_data *md;
-
-	hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
-
-	md = kzalloc(sizeof(struct mmm_data), GFP_KERNEL);
-	if (!md) {
-		hid_err(hdev, "cannot allocate 3M data\n");
-		return -ENOMEM;
-	}
-	hid_set_drvdata(hdev, md);
-
-	ret = hid_parse(hdev);
-	if (!ret)
-		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
-
-	if (ret)
-		kfree(md);
-	return ret;
-}
-
-static void mmm_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-	kfree(hid_get_drvdata(hdev));
-	hid_set_drvdata(hdev, NULL);
-}
-
-static const struct hid_device_id mmm_devices[] = {
-	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
-	{ }
-};
-MODULE_DEVICE_TABLE(hid, mmm_devices);
-
-static const struct hid_usage_id mmm_grabbed_usages[] = {
-	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
-	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
-};
-
-static struct hid_driver mmm_driver = {
-	.name = "3m-pct",
-	.id_table = mmm_devices,
-	.probe = mmm_probe,
-	.remove = mmm_remove,
-	.input_mapping = mmm_input_mapping,
-	.input_mapped = mmm_input_mapped,
-	.usage_table = mmm_grabbed_usages,
-	.event = mmm_event,
-};
-
-static int __init mmm_init(void)
-{
-	return hid_register_driver(&mmm_driver);
-}
-
-static void __exit mmm_exit(void)
-{
-	hid_unregister_driver(&mmm_driver);
-}
-
-module_init(mmm_init);
-module_exit(mmm_exit);
-
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index d31301e..7684e96 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -11,6 +11,12 @@
  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  *  Copyright (c) 2010 Canonical, Ltd.
  *
+ *  This code is partly based on hid-3m-pct.c:
+ *
+ *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
+ *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
+ *  Copyright (c) 2010      Canonical, Ltd.
+ *
  */
 
 /*
@@ -69,6 +75,8 @@ struct mt_class {
 	__s32 name;	/* MT_CLS */
 	__s32 quirks;
 	__s32 sn_move;	/* Signal/noise ratio for move events */
+	__s32 sn_width;	/* Signal/noise ratio for width events */
+	__s32 sn_height;	/* Signal/noise ratio for height events */
 	__s32 sn_pressure;	/* Signal/noise ratio for pressure events */
 	__u8 maxcontacts;
 };
@@ -80,6 +88,7 @@ struct mt_class {
 #define MT_CLS_CYPRESS				4
 #define MT_CLS_EGALAX				5
 #define MT_CLS_STANTUM				6
+#define MT_CLS_3M				7
 
 #define MT_DEFAULT_MAXCONTACT	10
 
@@ -141,6 +150,12 @@ struct mt_class mt_classes[] = {
 	},
 	{ .name = MT_CLS_STANTUM,
 		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
+	{ .name = MT_CLS_3M,
+		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
+			MT_QUIRK_SLOT_IS_CONTACTID,
+		.sn_move = 2048,
+		.sn_width = 128,
+		.sn_height = 128 },
 
 	{ }
 };
@@ -230,11 +245,15 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 		case HID_DG_WIDTH:
 			hid_map_usage(hi, usage, bit, max,
 					EV_ABS, ABS_MT_TOUCH_MAJOR);
+			set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
+				cls->sn_width);
 			td->last_slot_field = usage->hid;
 			return 1;
 		case HID_DG_HEIGHT:
 			hid_map_usage(hi, usage, bit, max,
 					EV_ABS, ABS_MT_TOUCH_MINOR);
+			set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
+				cls->sn_height);
 			input_set_abs_params(hi->input,
 					ABS_MT_ORIENTATION, 0, 1, 0, 0);
 			td->last_slot_field = usage->hid;
@@ -332,11 +351,18 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input)
 		input_mt_report_slot_state(input, MT_TOOL_FINGER,
 			s->touch_state);
 		if (s->touch_state) {
+			/* this finger is on the screen */
+			int wide = (s->w > s->h);
+			/* divided by two to match visual scale of touch */
+			int major = max(s->w, s->h) >> 1;
+			int minor = min(s->w, s->h) >> 1;
+
 			input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 			input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
+			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 			input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, s->w);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, s->h);
+			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
+			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 		}
 		s->seen_in_this_frame = false;
 
@@ -513,6 +539,14 @@ static void mt_remove(struct hid_device *hdev)
 
 static const struct hid_device_id mt_devices[] = {
 
+	/* 3M panels */
+	{ .driver_data = MT_CLS_3M,
+		HID_USB_DEVICE(USB_VENDOR_ID_3M,
+			USB_DEVICE_ID_3M1968) },
+	{ .driver_data = MT_CLS_3M,
+		HID_USB_DEVICE(USB_VENDOR_ID_3M,
+			USB_DEVICE_ID_3M2256) },
+
 	/* Cando panels */
 	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 		HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
-- 
1.7.4

Re: [PATCH v3 1/5] hid-multitouch: Auto detection of maxcontacts

[Henrik Rydberg]

On Fri, Mar 18, 2011 at 02:27:52PM +0100, Benjamin Tissoires wrote:
> This patch enables support of autodetection of maxcontacts.
> When adding support for a new device, one is now able to let
> the device tell how many contacts it supports, or to manually
> set the value if the device happens to provide wrong information.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> ---

Looks ok now. Thank you, Benjamin.

Reviewed-by: Henrik Rydberg <rydberg@euromail.se>

Henrik

Re: [PATCH v3 2/5] hid-multitouch: migrate support for Stantum panels to the unified driver.

[Henrik Rydberg]

On Fri, Mar 18, 2011 at 02:27:53PM +0100, Benjamin Tissoires wrote:
> This patch merges hid-stantum to the generic multitouch driver.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> ---

    Reviewed-by: Henrik Rydberg <rydberg@euromail.se>

Re: [PATCH v3 3/5] hid-multitouch: migrate Cando dual touch panels to hid-multitouch

[Henrik Rydberg]

On Fri, Mar 18, 2011 at 02:27:54PM +0100, Benjamin Tissoires wrote:
> This patch merges hid-cando into the unified multitouch driver.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> ---

    Reviewed-by: Henrik Rydberg <rydberg@euromail.se>

Re: [PATCH v3 4/5] hid-multitouch: refactor initialization of ABS_MT_ORIENTATION

[Henrik Rydberg]

On Fri, Mar 18, 2011 at 02:27:55PM +0100, Benjamin Tissoires wrote:
> No semantic changes, it's just easier to read the code.

Please augment this commit message.

> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> ---

Thanks,
Henrik

Re: [PATCH v3 5/5] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Henrik Rydberg]

Hi Benjamin,

On Fri, Mar 18, 2011 at 02:27:56PM +0100, Benjamin Tissoires wrote:
> This patch merges the hid-3m-pct driver into hid-multitouch.
> To keep devices working the same way they used to with hid-3m-pct,
> we need to add two signal/noise ratios for width and height.
> We also need to work on width/height to send proper
> ABS_MT_ORIENTATION flag.
> 
> Importing 3M into hid-multitouch also solved the bug in which
> devices handling width and height in their report descriptors
> did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> ---

The patch _looks_ good, but I have problems getting this to work on a
3M2256. What devices were this one tested on so far?

Henrik

Re: [PATCH v3 5/5] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Benjamin Tissoires]

On Mon, Mar 21, 2011 at 10:05, Henrik Rydberg <rydberg@euromail.se> wrote:
> Hi Benjamin,
>
> On Fri, Mar 18, 2011 at 02:27:56PM +0100, Benjamin Tissoires wrote:
>> This patch merges the hid-3m-pct driver into hid-multitouch.
>> To keep devices working the same way they used to with hid-3m-pct,
>> we need to add two signal/noise ratios for width and height.
>> We also need to work on width/height to send proper
>> ABS_MT_ORIENTATION flag.
>>
>> Importing 3M into hid-multitouch also solved the bug in which
>> devices handling width and height in their report descriptors
>> did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.
>>
>> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
>> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
>> ---
>
> The patch _looks_ good, but I have problems getting this to work on a
> 3M2256. What devices were this one tested on so far?

Hi Henrik,

I tested it against 3M1968. I'll try to have it again to make more testing.
What symptoms do you have?

For the current time, I'll redo the commit message of the previous one
and then eventually we can slip this one for the next round.

And many thanks for the review of the patch series.

Cheers,
Benjamin

>
> Henrik
>

Re: [PATCH v3 5/5] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Henrik Rydberg]

On Mon, Mar 21, 2011 at 11:13:46AM +0100, Benjamin Tissoires wrote:
> On Mon, Mar 21, 2011 at 10:05, Henrik Rydberg <rydberg@euromail.se> wrote:
> > Hi Benjamin,
> >
> > On Fri, Mar 18, 2011 at 02:27:56PM +0100, Benjamin Tissoires wrote:
> >> This patch merges the hid-3m-pct driver into hid-multitouch.
> >> To keep devices working the same way they used to with hid-3m-pct,
> >> we need to add two signal/noise ratios for width and height.
> >> We also need to work on width/height to send proper
> >> ABS_MT_ORIENTATION flag.
> >>
> >> Importing 3M into hid-multitouch also solved the bug in which
> >> devices handling width and height in their report descriptors
> >> did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.
> >>
> >> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> >> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> >> ---
> >
> > The patch _looks_ good, but I have problems getting this to work on a
> > 3M2256. What devices were this one tested on so far?
> 
> Hi Henrik,
> 
> I tested it against 3M1968. I'll try to have it again to make more testing.
> What symptoms do you have?

I think it is the input mode setting, but I am not sure yet.

Thanks,
Henrik

Re: [PATCH v3 4/5] hid-multitouch: refactor initialization of ABS_MT_ORIENTATION

[Benjamin Tissoires]

Hi Henrik,

On Mon, Mar 21, 2011 at 10:02, Henrik Rydberg <rydberg@euromail.se> wrote:
> On Fri, Mar 18, 2011 at 02:27:55PM +0100, Benjamin Tissoires wrote:
>> No semantic changes, it's just easier to read the code.
>
> Please augment this commit message.

How about:

"The way the input_set_abs_params was called for the new composite
field ABS_MT_ORIENTATION was not very clear at second reading.
We can remove the non-necessary call to set_abs and use the simple
call to input_set_abs_params."

Cheers,
Benjamin

>
>>
>> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
>> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
>> ---
>
> Thanks,
> Henrik
> --
> To unsubscribe from this list: send the line "unsubscribe linux-input" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Re: [PATCH v3 4/5] hid-multitouch: refactor initialization of ABS_MT_ORIENTATION

[Henrik Rydberg]

On Mon, Mar 21, 2011 at 02:32:16PM +0100, Benjamin Tissoires wrote:
> Hi Henrik,
> 
> On Mon, Mar 21, 2011 at 10:02, Henrik Rydberg <rydberg@euromail.se> wrote:
> > On Fri, Mar 18, 2011 at 02:27:55PM +0100, Benjamin Tissoires wrote:
> >> No semantic changes, it's just easier to read the code.
> >
> > Please augment this commit message.
> 
> How about:
> 
> "The way the input_set_abs_params was called for the new composite
> field ABS_MT_ORIENTATION was not very clear at second reading.
> We can remove the non-necessary call to set_abs and use the simple
> call to input_set_abs_params."

Sure thing. In addition, the old code was setting the hid parameters
for the wrong field, which was odd.

Thanks,
Henrik

Re: [PATCH 0/5] Migrations to hid-multitouch, round 3

[Jiri Kosina]

On Fri, 18 Mar 2011, Benjamin Tissoires wrote:

> This is the third version for this patch series.
> 
> Since last time, I mainly modified the patch #1 to adapt
> Henrik's comments. I also added #4 as the code path was confusing.

Thanks a lot to everyone for working on this.

I have applied all the patches except for 5/5, where Henrik has reported 
problems with testing against 1968 model. The problem hasn't been 
understood/debugged yet.

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: [PATCH 0/5] Migrations to hid-multitouch, round 3

[Henrik Rydberg]

Hi,

On Mon, Mar 21, 2011 at 05:09:14PM +0100, Jiri Kosina wrote:
> On Fri, 18 Mar 2011, Benjamin Tissoires wrote:
> 
> > This is the third version for this patch series.
> > 
> > Since last time, I mainly modified the patch #1 to adapt
> > Henrik's comments. I also added #4 as the code path was confusing.
> 
> Thanks a lot to everyone for working on this.
> 
> I have applied all the patches except for 5/5, where Henrik has reported 
> problems with testing against 1968 model. The problem hasn't been 

s/1968/2256/

> understood/debugged yet.

The reason is that the 2256 model sends extra data in each packet,
data that is not intercepted by the mt_event() function. The
last_field_index is therefore never seen, and no data is emitted. I
will reply to the original patch with a fix.

Thanks,
Henrik

Re: [PATCH v3 5/5] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Henrik Rydberg]

Hi Benjamin,

> I tested it against 3M1968. I'll try to have it again to make more testing.
> What symptoms do you have?

With the modification below, it works as expected, and you can add

    Reviewed-and-tested-by: Henrik Rydberg <rydberg@euromail.se>

Thanks!

Henrik

---

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 7684e96..0f5b89f 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -424,6 +424,8 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
 			break;
 
 		default:
+			if (td->last_field_index && field->index == td->last_field_index)
+				break;
 			/* fallback to the generic hidinput handling */
 			return 0;
 		}

Re: [PATCH v3 5/5] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Benjamin Tissoires]

Hi Henrik,

thanks a lot for spotting this.
I think the modification is safe, but I'll give a final test tomorrow
against our hardware.

Thanks,
Benjamin

On Mon, Mar 21, 2011 at 20:06, Henrik Rydberg <rydberg@euromail.se> wrote:
> Hi Benjamin,
>
>> I tested it against 3M1968. I'll try to have it again to make more testing.
>> What symptoms do you have?
>
> With the modification below, it works as expected, and you can add
>
>    Reviewed-and-tested-by: Henrik Rydberg <rydberg@euromail.se>
>
> Thanks!
>
> Henrik
>
> ---
>
> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> index 7684e96..0f5b89f 100644
> --- a/drivers/hid/hid-multitouch.c
> +++ b/drivers/hid/hid-multitouch.c
> @@ -424,6 +424,8 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
>                        break;
>
>                default:
> +                       if (td->last_field_index && field->index == td->last_field_index)
> +                               break;
>                        /* fallback to the generic hidinput handling */
>                        return 0;
>                }
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-input" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

[PATCH v4] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Benjamin Tissoires]

This patch merges the hid-3m-pct driver into hid-multitouch.
To keep devices working the same way they used to with hid-3m-pct,
we need to add two signal/noise ratios for width and height.
We also need to work on width/height to send proper
ABS_MT_ORIENTATION flag.

Importing 3M into hid-multitouch also solved the bug in which
devices handling width and height in their report descriptors
did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-by: Stéphane Chatty <chatty@enac.fr>
---
Hi guys,

I've added Henrik's patch and a comment:

/* we reach here when the last field in the
 * report is not related to multitouch.
 * This is not good. As a temporary solution,
 * we trigger our mt event completion and
 * ignore the field.
 */

Henrik, do I still have your Reviewed-and-tested-by ?

Cheers,
Benjamin

 drivers/hid/Kconfig          |    7 +-
 drivers/hid/Makefile         |    1 -
 drivers/hid/hid-3m-pct.c     |  305 ------------------------------------------
 drivers/hid/hid-multitouch.c |   47 ++++++-
 4 files changed, 46 insertions(+), 314 deletions(-)
 delete mode 100644 drivers/hid/hid-3m-pct.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 1edb0bd..996ae3a 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -55,12 +55,6 @@ source "drivers/hid/usbhid/Kconfig"
 menu "Special HID drivers"
 	depends on HID
 
-config HID_3M_PCT
-	tristate "3M PCT touchscreen"
-	depends on USB_HID
-	---help---
-	Support for 3M PCT touch screens.
-
 config HID_A4TECH
 	tristate "A4 tech mice" if EXPERT
 	depends on USB_HID
@@ -314,6 +308,7 @@ config HID_MULTITOUCH
 	  Generic support for HID multitouch panels.
 
 	  Say Y here if you have one of the following devices:
+	  - 3M PCT touch screens
 	  - Cando dual touch panel
 	  - Cypress TrueTouch panels
 	  - Hanvon dual touch panels
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index f8b90e4..11c9f0b 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -25,7 +25,6 @@ ifdef CONFIG_LOGIWII_FF
 	hid-logitech-y	+= hid-lg4ff.o
 endif
 
-obj-$(CONFIG_HID_3M_PCT)	+= hid-3m-pct.o
 obj-$(CONFIG_HID_A4TECH)	+= hid-a4tech.o
 obj-$(CONFIG_HID_ACRUX)		+= hid-axff.o
 obj-$(CONFIG_HID_APPLE)		+= hid-apple.o
diff --git a/drivers/hid/hid-3m-pct.c b/drivers/hid/hid-3m-pct.c
deleted file mode 100644
index 5243ae2..0000000
--- a/drivers/hid/hid-3m-pct.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/*
- *  HID driver for 3M PCT multitouch panels
- *
- *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
- *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
- *  Copyright (c) 2010      Canonical, Ltd.
- *
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- */
-
-#include <linux/device.h>
-#include <linux/hid.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/input/mt.h>
-
-MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
-MODULE_DESCRIPTION("3M PCT multitouch panels");
-MODULE_LICENSE("GPL");
-
-#include "hid-ids.h"
-
-#define MAX_SLOTS		60
-
-/* estimated signal-to-noise ratios */
-#define SN_MOVE			2048
-#define SN_WIDTH		128
-
-struct mmm_finger {
-	__s32 x, y, w, h;
-	bool touch, valid;
-};
-
-struct mmm_data {
-	struct mmm_finger f[MAX_SLOTS];
-	__u8 curid;
-	__u8 nexp, nreal;
-	bool touch, valid;
-};
-
-static int mmm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
-		struct hid_field *field, struct hid_usage *usage,
-		unsigned long **bit, int *max)
-{
-	int f1 = field->logical_minimum;
-	int f2 = field->logical_maximum;
-	int df = f2 - f1;
-
-	switch (usage->hid & HID_USAGE_PAGE) {
-
-	case HID_UP_BUTTON:
-		return -1;
-
-	case HID_UP_GENDESK:
-		switch (usage->hid) {
-		case HID_GD_X:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_X);
-			input_set_abs_params(hi->input, ABS_MT_POSITION_X,
-					     f1, f2, df / SN_MOVE, 0);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_X,
-					     f1, f2, df / SN_MOVE, 0);
-			return 1;
-		case HID_GD_Y:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_Y);
-			input_set_abs_params(hi->input, ABS_MT_POSITION_Y,
-					     f1, f2, df / SN_MOVE, 0);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_Y,
-					     f1, f2, df / SN_MOVE, 0);
-			return 1;
-		}
-		return 0;
-
-	case HID_UP_DIGITIZER:
-		switch (usage->hid) {
-		/* we do not want to map these: no input-oriented meaning */
-		case 0x14:
-		case 0x23:
-		case HID_DG_INPUTMODE:
-		case HID_DG_DEVICEINDEX:
-		case HID_DG_CONTACTCOUNT:
-		case HID_DG_CONTACTMAX:
-		case HID_DG_INRANGE:
-		case HID_DG_CONFIDENCE:
-			return -1;
-		case HID_DG_TIPSWITCH:
-			/* touchscreen emulation */
-			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
-			input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
-			return 1;
-		case HID_DG_WIDTH:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MAJOR);
-			input_set_abs_params(hi->input, ABS_MT_TOUCH_MAJOR,
-					     f1, f2, df / SN_WIDTH, 0);
-			return 1;
-		case HID_DG_HEIGHT:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MINOR);
-			input_set_abs_params(hi->input, ABS_MT_TOUCH_MINOR,
-					     f1, f2, df / SN_WIDTH, 0);
-			input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
-					0, 1, 0, 0);
-			return 1;
-		case HID_DG_CONTACTID:
-			input_mt_init_slots(hi->input, MAX_SLOTS);
-			return 1;
-		}
-		/* let hid-input decide for the others */
-		return 0;
-
-	case 0xff000000:
-		/* we do not want to map these: no input-oriented meaning */
-		return -1;
-	}
-
-	return 0;
-}
-
-static int mmm_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)
-		set_bit(usage->type, hi->input->evbit);
-	return -1;
-}
-
-/*
- * this function is called when a whole packet has been received and processed,
- * so that it can decide what to send to the input layer.
- */
-static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
-{
-	int i;
-	for (i = 0; i < MAX_SLOTS; ++i) {
-		struct mmm_finger *f = &md->f[i];
-		if (!f->valid) {
-			/* this finger is just placeholder data, ignore */
-			continue;
-		}
-		input_mt_slot(input, i);
-		input_mt_report_slot_state(input, MT_TOOL_FINGER, f->touch);
-		if (f->touch) {
-			/* this finger is on the screen */
-			int wide = (f->w > f->h);
-			/* divided by two to match visual scale of touch */
-			int major = max(f->w, f->h) >> 1;
-			int minor = min(f->w, f->h) >> 1;
-
-			input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
-			input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
-			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
-		}
-		f->valid = 0;
-	}
-
-	input_mt_report_pointer_emulation(input, true);
-	input_sync(input);
-}
-
-/*
- * this function is called upon all reports
- * so that we can accumulate contact point information,
- * and call input_mt_sync after each point.
- */
-static int mmm_event(struct hid_device *hid, struct hid_field *field,
-				struct hid_usage *usage, __s32 value)
-{
-	struct mmm_data *md = hid_get_drvdata(hid);
-	/*
-	 * strangely, this function can be called before
-	 * field->hidinput is initialized!
-	 */
-	if (hid->claimed & HID_CLAIMED_INPUT) {
-		struct input_dev *input = field->hidinput->input;
-		switch (usage->hid) {
-		case HID_DG_TIPSWITCH:
-			md->touch = value;
-			break;
-		case HID_DG_CONFIDENCE:
-			md->valid = value;
-			break;
-		case HID_DG_WIDTH:
-			if (md->valid)
-				md->f[md->curid].w = value;
-			break;
-		case HID_DG_HEIGHT:
-			if (md->valid)
-				md->f[md->curid].h = value;
-			break;
-		case HID_DG_CONTACTID:
-			value = clamp_val(value, 0, MAX_SLOTS - 1);
-			if (md->valid) {
-				md->curid = value;
-				md->f[value].touch = md->touch;
-				md->f[value].valid = 1;
-				md->nreal++;
-			}
-			break;
-		case HID_GD_X:
-			if (md->valid)
-				md->f[md->curid].x = value;
-			break;
-		case HID_GD_Y:
-			if (md->valid)
-				md->f[md->curid].y = value;
-			break;
-		case HID_DG_CONTACTCOUNT:
-			if (value)
-				md->nexp = value;
-			if (md->nreal >= md->nexp) {
-				mmm_filter_event(md, input);
-				md->nreal = 0;
-			}
-			break;
-		}
-	}
-
-	/* we have handled the hidinput part, now remains hiddev */
-	if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
-		hid->hiddev_hid_event(hid, field, usage, value);
-
-	return 1;
-}
-
-static int mmm_probe(struct hid_device *hdev, const struct hid_device_id *id)
-{
-	int ret;
-	struct mmm_data *md;
-
-	hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
-
-	md = kzalloc(sizeof(struct mmm_data), GFP_KERNEL);
-	if (!md) {
-		hid_err(hdev, "cannot allocate 3M data\n");
-		return -ENOMEM;
-	}
-	hid_set_drvdata(hdev, md);
-
-	ret = hid_parse(hdev);
-	if (!ret)
-		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
-
-	if (ret)
-		kfree(md);
-	return ret;
-}
-
-static void mmm_remove(struct hid_device *hdev)
-{
-	hid_hw_stop(hdev);
-	kfree(hid_get_drvdata(hdev));
-	hid_set_drvdata(hdev, NULL);
-}
-
-static const struct hid_device_id mmm_devices[] = {
-	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
-	{ }
-};
-MODULE_DEVICE_TABLE(hid, mmm_devices);
-
-static const struct hid_usage_id mmm_grabbed_usages[] = {
-	{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
-	{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
-};
-
-static struct hid_driver mmm_driver = {
-	.name = "3m-pct",
-	.id_table = mmm_devices,
-	.probe = mmm_probe,
-	.remove = mmm_remove,
-	.input_mapping = mmm_input_mapping,
-	.input_mapped = mmm_input_mapped,
-	.usage_table = mmm_grabbed_usages,
-	.event = mmm_event,
-};
-
-static int __init mmm_init(void)
-{
-	return hid_register_driver(&mmm_driver);
-}
-
-static void __exit mmm_exit(void)
-{
-	hid_unregister_driver(&mmm_driver);
-}
-
-module_init(mmm_init);
-module_exit(mmm_exit);
-
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index d31301e..0175f85 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -11,6 +11,12 @@
  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  *  Copyright (c) 2010 Canonical, Ltd.
  *
+ *  This code is partly based on hid-3m-pct.c:
+ *
+ *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
+ *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
+ *  Copyright (c) 2010      Canonical, Ltd.
+ *
  */
 
 /*
@@ -69,6 +75,8 @@ struct mt_class {
 	__s32 name;	/* MT_CLS */
 	__s32 quirks;
 	__s32 sn_move;	/* Signal/noise ratio for move events */
+	__s32 sn_width;	/* Signal/noise ratio for width events */
+	__s32 sn_height;	/* Signal/noise ratio for height events */
 	__s32 sn_pressure;	/* Signal/noise ratio for pressure events */
 	__u8 maxcontacts;
 };
@@ -80,6 +88,7 @@ struct mt_class {
 #define MT_CLS_CYPRESS				4
 #define MT_CLS_EGALAX				5
 #define MT_CLS_STANTUM				6
+#define MT_CLS_3M				7
 
 #define MT_DEFAULT_MAXCONTACT	10
 
@@ -141,6 +150,12 @@ struct mt_class mt_classes[] = {
 	},
 	{ .name = MT_CLS_STANTUM,
 		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
+	{ .name = MT_CLS_3M,
+		.quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
+			MT_QUIRK_SLOT_IS_CONTACTID,
+		.sn_move = 2048,
+		.sn_width = 128,
+		.sn_height = 128 },
 
 	{ }
 };
@@ -230,11 +245,15 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 		case HID_DG_WIDTH:
 			hid_map_usage(hi, usage, bit, max,
 					EV_ABS, ABS_MT_TOUCH_MAJOR);
+			set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
+				cls->sn_width);
 			td->last_slot_field = usage->hid;
 			return 1;
 		case HID_DG_HEIGHT:
 			hid_map_usage(hi, usage, bit, max,
 					EV_ABS, ABS_MT_TOUCH_MINOR);
+			set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
+				cls->sn_height);
 			input_set_abs_params(hi->input,
 					ABS_MT_ORIENTATION, 0, 1, 0, 0);
 			td->last_slot_field = usage->hid;
@@ -332,11 +351,18 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input)
 		input_mt_report_slot_state(input, MT_TOOL_FINGER,
 			s->touch_state);
 		if (s->touch_state) {
+			/* this finger is on the screen */
+			int wide = (s->w > s->h);
+			/* divided by two to match visual scale of touch */
+			int major = max(s->w, s->h) >> 1;
+			int minor = min(s->w, s->h) >> 1;
+
 			input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 			input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
+			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 			input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, s->w);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, s->h);
+			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
+			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 		}
 		s->seen_in_this_frame = false;
 
@@ -398,6 +424,15 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
 			break;
 
 		default:
+			if (td->last_field_index
+				&& field->index == td->last_field_index)
+				/* we reach here when the last field in the
+				 * report is not related to multitouch.
+				 * This is not good. As a temporary solution,
+				 * we trigger our mt event completion and
+				 * ignore the field.
+				 */
+				break;
 			/* fallback to the generic hidinput handling */
 			return 0;
 		}
@@ -513,6 +548,14 @@ static void mt_remove(struct hid_device *hdev)
 
 static const struct hid_device_id mt_devices[] = {
 
+	/* 3M panels */
+	{ .driver_data = MT_CLS_3M,
+		HID_USB_DEVICE(USB_VENDOR_ID_3M,
+			USB_DEVICE_ID_3M1968) },
+	{ .driver_data = MT_CLS_3M,
+		HID_USB_DEVICE(USB_VENDOR_ID_3M,
+			USB_DEVICE_ID_3M2256) },
+
 	/* Cando panels */
 	{ .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 		HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
-- 
1.7.4

Re: [PATCH v4] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Henrik Rydberg]

On Tue, Mar 22, 2011 at 05:34:01PM +0100, Benjamin Tissoires wrote:
> This patch merges the hid-3m-pct driver into hid-multitouch.
> To keep devices working the same way they used to with hid-3m-pct,
> we need to add two signal/noise ratios for width and height.
> We also need to work on width/height to send proper
> ABS_MT_ORIENTATION flag.
> 
> Importing 3M into hid-multitouch also solved the bug in which
> devices handling width and height in their report descriptors
> did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> ---
[...]
> Henrik, do I still have your Reviewed-and-tested-by ?

Yep, looks good. One more thing, though:

> @@ -332,11 +351,18 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input)
>  		input_mt_report_slot_state(input, MT_TOOL_FINGER,
>  			s->touch_state);
>  		if (s->touch_state) {
> +			/* this finger is on the screen */
> +			int wide = (s->w > s->h);
> +			/* divided by two to match visual scale of touch */
> +			int major = max(s->w, s->h) >> 1;
> +			int minor = min(s->w, s->h) >> 1;

This scaling is most likely not correct for all devices. I went
through a set of devices some time ago, running mtview on all of them,
visually inspecting the touch size. Some were low by a factor of two,
some were high by a factor of two. A confirmation that the other
devices supported by this driver seem right would be good. If not, a
quirk should probably be added here.

> +
>  			input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
>  			input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
> +			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
>  			input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
> -			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, s->w);
> -			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, s->h);
> +			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
> +			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
>  		}
>  		s->seen_in_this_frame = false;

Thanks,
Henrik

Re: [PATCH v4] hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

[Jiri Kosina]

On Tue, 22 Mar 2011, Henrik Rydberg wrote:

> On Tue, Mar 22, 2011 at 05:34:01PM +0100, Benjamin Tissoires wrote:
> > This patch merges the hid-3m-pct driver into hid-multitouch.
> > To keep devices working the same way they used to with hid-3m-pct,
> > we need to add two signal/noise ratios for width and height.
> > We also need to work on width/height to send proper
> > ABS_MT_ORIENTATION flag.
> > 
> > Importing 3M into hid-multitouch also solved the bug in which
> > devices handling width and height in their report descriptors
> > did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.
> > 
> > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
> > Reviewed-by: Stéphane Chatty <chatty@enac.fr>
> > ---
> [...]
> > Henrik, do I still have your Reviewed-and-tested-by ?
> 
> Yep, looks good. One more thing, though:
> 
> > @@ -332,11 +351,18 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input)
> >  		input_mt_report_slot_state(input, MT_TOOL_FINGER,
> >  			s->touch_state);
> >  		if (s->touch_state) {
> > +			/* this finger is on the screen */
> > +			int wide = (s->w > s->h);
> > +			/* divided by two to match visual scale of touch */
> > +			int major = max(s->w, s->h) >> 1;
> > +			int minor = min(s->w, s->h) >> 1;
> 
> This scaling is most likely not correct for all devices. I went
> through a set of devices some time ago, running mtview on all of them,
> visually inspecting the touch size. Some were low by a factor of two,
> some were high by a factor of two. A confirmation that the other
> devices supported by this driver seem right would be good. If not, a
> quirk should probably be added here.

Okay, thanks a lot for the review. This can be handled later during 
-rc phase if needed. So please proceed with confirming with the existing 
devices, and meanwhile I have applied the patch.

> > +
> >  			input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
> >  			input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
> > +			input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
> >  			input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
> > -			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, s->w);
> > -			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, s->h);
> > +			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
> > +			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
> >  		}
> >  		s->seen_in_this_frame = false;

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.