HID: hid-multitouch: support for PixCir-based panels (5519cab4) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/hid/Kconfig

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -285,6 +285,15 @@ config HID_MONTEREY
	---help---		---help---
	Support for Monterey Genius KB29E.		Support for Monterey Genius KB29E.

			config HID_MULTITOUCH
			tristate "HID Multitouch panels"
			depends on USB_HID
			---help---
			Generic support for HID multitouch panels.

			Say Y here if you have one of the following devices:
			- PixCir touchscreen

	config HID_NTRIG		config HID_NTRIG
	tristate "N-Trig touch screen"		tristate "N-Trig touch screen"
	depends on USB_HID		depends on USB_HID

drivers/hid/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -46,6 +46,7 @@ obj-$(CONFIG_HID_MAGICMOUSE) += hid-magicmouse.o
	obj-$(CONFIG_HID_MICROSOFT) += hid-microsoft.o		obj-$(CONFIG_HID_MICROSOFT) += hid-microsoft.o
	obj-$(CONFIG_HID_MONTEREY) += hid-monterey.o		obj-$(CONFIG_HID_MONTEREY) += hid-monterey.o
	obj-$(CONFIG_HID_MOSART) += hid-mosart.o		obj-$(CONFIG_HID_MOSART) += hid-mosart.o
			obj-$(CONFIG_HID_MULTITOUCH) += hid-multitouch.o
	obj-$(CONFIG_HID_NTRIG) += hid-ntrig.o		obj-$(CONFIG_HID_NTRIG) += hid-ntrig.o
	obj-$(CONFIG_HID_ORTEK) += hid-ortek.o		obj-$(CONFIG_HID_ORTEK) += hid-ortek.o
	obj-$(CONFIG_HID_PRODIKEYS) += hid-prodikeys.o		obj-$(CONFIG_HID_PRODIKEYS) += hid-prodikeys.o

drivers/hid/hid-core.c

+2 −0

drivers/hid/hid-ids.h

+4 −0

drivers/hid/hid-multitouch.c

0 → 100644

+468 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* HID driver for multitouch panels
			*
			* Copyright (c) 2010-2011 Stephane Chatty <chatty@enac.fr>
			* Copyright (c) 2010-2011 Benjamin Tissoires <benjamin.tissoires@gmail.com>
			* Copyright (c) 2010-2011 Ecole Nationale de l'Aviation Civile, France
			*
			*/

			/*
			* 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>
			#include "usbhid/usbhid.h"


			MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
			MODULE_DESCRIPTION("HID multitouch panels");
			MODULE_LICENSE("GPL");

			#include "hid-ids.h"

			/* quirks to control the device */
			#define MT_QUIRK_NOT_SEEN_MEANS_UP (1 << 0)
			#define MT_QUIRK_SLOT_IS_CONTACTID (1 << 1)

			struct mt_slot {
			__s32 x, y, p, w, h;
			__s32 contactid; /* the device ContactID assigned to this slot */
			bool touch_state; /* is the touch valid? */
			bool seen_in_this_frame;/* has this slot been updated */
			};

			struct mt_device {
			struct mt_slot curdata; /* placeholder of incoming data */
			struct mt_class mtclass; / our mt device class */
			unsigned last_field_index; /* last field index of the report */
			unsigned last_slot_field; /* the last field of a slot */
			__s8 inputmode; /* InputMode HID feature, -1 if non-existent */
			__u8 num_received; /* how many contacts we received */
			__u8 num_expected; /* expected last contact index */
			bool curvalid; /* is the current contact valid? */
			struct mt_slot slots[0]; /* first slot */
			};

			struct mt_class {
			__s32 quirks;
			__s32 sn_move; /* Signal/noise ratio for move events */
			__s32 sn_pressure; /* Signal/noise ratio for pressure events */
			__u8 maxcontacts;
			};

			/* classes of device behavior */
			#define MT_CLS_DEFAULT 0
			#define MT_CLS_DUAL1 1

			/*
			* these device-dependent functions determine what slot corresponds
			* to a valid contact that was just read.
			*/

			static int slot_is_contactid(struct mt_device *td)
			{
			return td->curdata.contactid;
			}

			static int find_slot_from_contactid(struct mt_device *td)
			{
			int i;
			for (i = 0; i < td->mtclass->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) {
			if (!td->slots[i].seen_in_this_frame &&
			!td->slots[i].touch_state)
			return i;
			}
			return -1;
			/* should not occurs. If this happens that means
			* that the device sent more touches that it says
			* in the report descriptor. It is ignored then. */
			}

			struct mt_class mt_classes[] = {
			{ 0, 0, 0, 10 }, /* MT_CLS_DEFAULT */
			{ MT_QUIRK_SLOT_IS_CONTACTID, 0, 0, 2 }, /* MT_CLS_DUAL1 */
			};

			static void mt_feature_mapping(struct hid_device hdev, struct hid_input hi,
			struct hid_field field, struct hid_usage usage)
			{
			if (usage->hid == HID_DG_INPUTMODE) {
			struct mt_device *td = hid_get_drvdata(hdev);
			td->inputmode = field->report->id;
			}
			}

			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 mt_input_mapping(struct hid_device hdev, struct hid_input hi,
			struct hid_field field, struct hid_usage usage,
			unsigned long *bit, int max)
			{
			struct mt_device *td = hid_get_drvdata(hdev);
			struct mt_class *cls = td->mtclass;
			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);
			set_abs(hi->input, ABS_MT_POSITION_X, field,
			cls->sn_move);
			/* touchscreen emulation */
			set_abs(hi->input, ABS_X, field, cls->sn_move);
			td->last_slot_field = usage->hid;
			return 1;
			case HID_GD_Y:
			hid_map_usage(hi, usage, bit, max,
			EV_ABS, ABS_MT_POSITION_Y);
			set_abs(hi->input, ABS_MT_POSITION_Y, field,
			cls->sn_move);
			/* touchscreen emulation */
			set_abs(hi->input, ABS_Y, field, cls->sn_move);
			td->last_slot_field = usage->hid;
			return 1;
			}
			return 0;

			case HID_UP_DIGITIZER:
			switch (usage->hid) {
			case HID_DG_INRANGE:
			td->last_slot_field = usage->hid;
			return 1;
			case HID_DG_CONFIDENCE:
			td->last_slot_field = usage->hid;
			return 1;
			case HID_DG_TIPSWITCH:
			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
			input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
			td->last_slot_field = usage->hid;
			return 1;
			case HID_DG_CONTACTID:
			input_mt_init_slots(hi->input,
			td->mtclass->maxcontacts);
			td->last_slot_field = usage->hid;
			return 1;
			case HID_DG_WIDTH:
			hid_map_usage(hi, usage, bit, max,
			EV_ABS, ABS_MT_TOUCH_MAJOR);
			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);
			field->logical_maximum = 1;
			field->logical_minimum = 1;
			set_abs(hi->input, ABS_MT_ORIENTATION, field, 0);
			td->last_slot_field = usage->hid;
			return 1;
			case HID_DG_TIPPRESSURE:
			hid_map_usage(hi, usage, bit, max,
			EV_ABS, ABS_MT_PRESSURE);
			set_abs(hi->input, ABS_MT_PRESSURE, field,
			cls->sn_pressure);
			/* touchscreen emulation */
			set_abs(hi->input, ABS_PRESSURE, field,
			cls->sn_pressure);
			td->last_slot_field = usage->hid;
			return 1;
			case HID_DG_CONTACTCOUNT:
			td->last_field_index = field->report->maxfield - 1;
			return 1;
			case HID_DG_CONTACTMAX:
			/* we don't set td->last_slot_field as contactcount and
			* contact max are global to the report */
			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 mt_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)
			set_bit(usage->type, hi->input->evbit);

			return -1;
			}

			static int mt_compute_slot(struct mt_device *td)
			{
			struct mt_class *cls = td->mtclass;

			if (cls->quirks & MT_QUIRK_SLOT_IS_CONTACTID)
			return slot_is_contactid(td);

			return find_slot_from_contactid(td);
			}

			/*
			* this function is called when a whole contact has been processed,
			* so that it can assign it to a slot and store the data there
			*/
			static void mt_complete_slot(struct mt_device *td)
			{
			if (td->curvalid) {
			struct mt_slot *slot;
			int slotnum = mt_compute_slot(td);

			if (slotnum >= 0 && slotnum < td->mtclass->maxcontacts) {
			slot = td->slots + slotnum;

			memcpy(slot, &(td->curdata), sizeof(struct mt_slot));
			slot->seen_in_this_frame = true;
			}
			}
			td->num_received++;
			}


			/*
			* 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 mt_emit_event(struct mt_device td, struct input_dev input)
			{
			int i;

			for (i = 0; i < td->mtclass->maxcontacts; ++i) {
			struct mt_slot *s = &(td->slots[i]);
			if ((td->mtclass->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
			!s->seen_in_this_frame) {
			/*
			* this slot does not contain useful data,
			* notify its closure
			*/
			s->touch_state = false;
			}

			input_mt_slot(input, i);
			input_mt_report_slot_state(input, MT_TOOL_FINGER,
			s->touch_state);
			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_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);
			s->seen_in_this_frame = false;

			}

			input_mt_report_pointer_emulation(input, true);
			input_sync(input);
			td->num_received = 0;
			}



			static int mt_event(struct hid_device hid, struct hid_field field,
			struct hid_usage *usage, __s32 value)
			{
			struct mt_device *td = hid_get_drvdata(hid);

			if (hid->claimed & HID_CLAIMED_INPUT) {
			switch (usage->hid) {
			case HID_DG_INRANGE:
			break;
			case HID_DG_TIPSWITCH:
			td->curvalid = value;
			td->curdata.touch_state = value;
			break;
			case HID_DG_CONFIDENCE:
			break;
			case HID_DG_CONTACTID:
			td->curdata.contactid = value;
			break;
			case HID_DG_TIPPRESSURE:
			td->curdata.p = value;
			break;
			case HID_GD_X:
			td->curdata.x = value;
			break;
			case HID_GD_Y:
			td->curdata.y = value;
			break;
			case HID_DG_WIDTH:
			td->curdata.w = value;
			break;
			case HID_DG_HEIGHT:
			td->curdata.h = value;
			break;
			case HID_DG_CONTACTCOUNT:
			/*
			* We must not overwrite the previous value (some
			* devices send one sequence splitted over several
			* messages)
			*/
			if (value)
			td->num_expected = value - 1;
			break;

			default:
			/* fallback to the generic hidinput handling */
			return 0;
			}
			}

			if (usage->hid == td->last_slot_field)
			mt_complete_slot(td);

			if (field->index == td->last_field_index
			&& td->num_received > td->num_expected)
			mt_emit_event(td, field->hidinput->input);

			/* 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 void mt_set_input_mode(struct hid_device *hdev)
			{
			struct mt_device *td = hid_get_drvdata(hdev);
			struct hid_report *r;
			struct hid_report_enum *re;

			if (td->inputmode < 0)
			return;

			re = &(hdev->report_enum[HID_FEATURE_REPORT]);
			r = re->report_id_hash[td->inputmode];
			if (r) {
			r->field[0]->value[0] = 0x02;
			usbhid_submit_report(hdev, r, USB_DIR_OUT);
			}
			}

			static int mt_probe(struct hid_device hdev, const struct hid_device_id id)
			{
			int ret;
			struct mt_device *td;
			struct mt_class *mtclass = mt_classes + id->driver_data;

			/* This allows the driver to correctly support devices
			* that emit events over several HID messages.
			*/
			hdev->quirks \|= HID_QUIRK_NO_INPUT_SYNC;

			td = kzalloc(sizeof(struct mt_device) +
			mtclass->maxcontacts * sizeof(struct mt_slot),
			GFP_KERNEL);
			if (!td) {
			dev_err(&hdev->dev, "cannot allocate multitouch data\n");
			return -ENOMEM;
			}
			td->mtclass = mtclass;
			td->inputmode = -1;
			hid_set_drvdata(hdev, td);

			ret = hid_parse(hdev);
			if (ret != 0)
			goto fail;

			ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
			if (ret != 0)
			goto fail;

			mt_set_input_mode(hdev);

			return 0;

			fail:
			kfree(td);
			return ret;
			}

			#ifdef CONFIG_PM
			static int mt_reset_resume(struct hid_device *hdev)
			{
			mt_set_input_mode(hdev);
			return 0;
			}
			#endif

			static void mt_remove(struct hid_device *hdev)
			{
			struct mt_device *td = hid_get_drvdata(hdev);
			hid_hw_stop(hdev);
			kfree(td);
			hid_set_drvdata(hdev, NULL);
			}

			static const struct hid_device_id mt_devices[] = {

			/* PixCir-based panels */
			{ .driver_data = MT_CLS_DUAL1,
			HID_USB_DEVICE(USB_VENDOR_ID_HANVON,
			USB_DEVICE_ID_HANVON_MULTITOUCH) },
			{ .driver_data = MT_CLS_DUAL1,
			HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
			USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },

			{ }
			};
			MODULE_DEVICE_TABLE(hid, mt_devices);

			static const struct hid_usage_id mt_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 mt_driver = {
			.name = "hid-multitouch",
			.id_table = mt_devices,
			.probe = mt_probe,
			.remove = mt_remove,
			.input_mapping = mt_input_mapping,
			.input_mapped = mt_input_mapped,
			.feature_mapping = mt_feature_mapping,
			.usage_table = mt_grabbed_usages,
			.event = mt_event,
			#ifdef CONFIG_PM
			.reset_resume = mt_reset_resume,
			#endif
			};

			static int __init mt_init(void)
			{
			return hid_register_driver(&mt_driver);
			}

			static void __exit mt_exit(void)
			{
			hid_unregister_driver(&mt_driver);
			}

			module_init(mt_init);
			module_exit(mt_exit);

Original line number	Original line	Diff line number	Diff line
	@@ -1286,6 +1286,7 @@ static const struct hid_device_id hid_blacklist[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },		{ HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },		{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },		{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
			{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
	{ 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) },
	{ 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_11_6) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },		{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
	@@ -1312,6 +1313,7 @@ static const struct hid_device_id hid_blacklist[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },		{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },		{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },		{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
			{ HID_USB_DEVICE(USB_VENDOR_ID_HANVON, USB_DEVICE_ID_HANVON_MULTITOUCH) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },		{ HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },		{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },		{ HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },

Original line number	Original line	Diff line number	Diff line
	@@ -134,6 +134,7 @@
	#define USB_DEVICE_ID_BTC_EMPREX_REMOTE_2 0x5577		#define USB_DEVICE_ID_BTC_EMPREX_REMOTE_2 0x5577

	#define USB_VENDOR_ID_CANDO 0x2087		#define USB_VENDOR_ID_CANDO 0x2087
			#define USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH 0x0703
	#define USB_DEVICE_ID_CANDO_MULTI_TOUCH 0x0a01		#define USB_DEVICE_ID_CANDO_MULTI_TOUCH 0x0a01
	#define USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6 0x0b03		#define USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6 0x0b03
	#define USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6 0x0f01		#define USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6 0x0f01
	@@ -308,6 +309,9 @@
	#define USB_DEVICE_ID_HANWANG_TABLET_FIRST 0x5000		#define USB_DEVICE_ID_HANWANG_TABLET_FIRST 0x5000
	#define USB_DEVICE_ID_HANWANG_TABLET_LAST 0x8fff		#define USB_DEVICE_ID_HANWANG_TABLET_LAST 0x8fff

			#define USB_VENDOR_ID_HANVON 0x20b3
			#define USB_DEVICE_ID_HANVON_MULTITOUCH 0x0a18

	#define USB_VENDOR_ID_HAPP 0x078b		#define USB_VENDOR_ID_HAPP 0x078b
	#define USB_DEVICE_ID_UGCI_DRIVING 0x0010		#define USB_DEVICE_ID_UGCI_DRIVING 0x0010
	#define USB_DEVICE_ID_UGCI_FLYING 0x0020		#define USB_DEVICE_ID_UGCI_FLYING 0x0020