HID: Support for MosArt multitouch panel (77f720b7) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/hid/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -204,6 +204,12 @@ config HID_MICROSOFT
		---help---
		Support for Microsoft devices that are not fully compliant with HID standard.

		config HID_MOSART
		tristate "MosArt"
		depends on USB_HID
		---help---
		Support for MosArt dual-touch panels.

		config HID_MONTEREY
		tristate "Monterey" if EMBEDDED
		depends on USB_HID

drivers/hid/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,7 @@ obj-$(CONFIG_HID_KYE) += hid-kye.o
		obj-$(CONFIG_HID_LOGITECH) += hid-logitech.o
		obj-$(CONFIG_HID_MICROSOFT) += hid-microsoft.o
		obj-$(CONFIG_HID_MONTEREY) += hid-monterey.o
		obj-$(CONFIG_HID_MOSART) += hid-mosart.o
		obj-$(CONFIG_HID_NTRIG) += hid-ntrig.o
		obj-$(CONFIG_HID_ORTEK) += hid-ortek.o
		obj-$(CONFIG_HID_QUANTA) += hid-quanta.o

drivers/hid/hid-core.c

+3 −2

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		@@ -1550,8 +1550,9 @@ static const struct hid_device_id hid_ignore_list[] = {
		{ HID_USB_DEVICE(USB_VENDOR_ID_AIPTEK, USB_DEVICE_ID_AIPTEK_24) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_AIRCABLE, USB_DEVICE_ID_AIRCABLE1) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_ALCOR, USB_DEVICE_ID_ALCOR_USBRS232) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM)},
		{ HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2)},
		{ HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_T91MT)},
		{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM)},
		{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_LCM2)},
		{ HID_USB_DEVICE(USB_VENDOR_ID_AVERMEDIA, USB_DEVICE_ID_AVER_FM_MR800) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_BERKSHIRE, USB_DEVICE_ID_BERKSHIRE_PCWD) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_CIDC, 0x0103) },

drivers/hid/hid-ids.h

+6 −3

Original line number	Diff line number	Diff line
		@@ -99,9 +99,12 @@
		#define USB_DEVICE_ID_APPLE_ATV_IRCONTROL 0x8241
		#define USB_DEVICE_ID_APPLE_IRCONTROL4 0x8242

		#define USB_VENDOR_ID_ASUS 0x0b05
		#define USB_DEVICE_ID_ASUS_LCM 0x1726
		#define USB_DEVICE_ID_ASUS_LCM2 0x175b
		#define USB_VENDOR_ID_ASUS 0x0486
		#define USB_DEVICE_ID_ASUS_T91MT 0x0185

		#define USB_VENDOR_ID_ASUSTEK 0x0b05
		#define USB_DEVICE_ID_ASUSTEK_LCM 0x1726
		#define USB_DEVICE_ID_ASUSTEK_LCM2 0x175b

		#define USB_VENDOR_ID_ATEN 0x0557
		#define USB_DEVICE_ID_ATEN_UC100KM 0x2004

drivers/hid/hid-mosart.c

0 → 100644

+274 −0

Original line number	Diff line number	Diff line
		/*
		* HID driver for the multitouch panel on the ASUS EeePC T91MT
		*
		* Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
		* Copyright (c) 2010 Teemu Tuominen <teemu.tuominen@cybercom.com>
		*
		*/

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

		MODULE_VERSION("1.00");
		MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
		MODULE_DESCRIPTION("MosArt dual-touch panel");
		MODULE_LICENSE("GPL");

		#include "hid-ids.h"

		struct mosart_data {
		__u16 x, y;
		__u8 id;
		bool valid; /* valid finger data, or just placeholder? */
		bool first; /* is this the first finger in this frame? */
		bool activity_now; /* at least one active finger in this frame? */
		bool activity; /* at least one active finger previously? */
		};

		static int mosart_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_CONFIDENCE:
		case HID_DG_TIPSWITCH:
		case HID_DG_INPUTMODE:
		case HID_DG_DEVICEINDEX:
		case HID_DG_CONTACTCOUNT:
		case HID_DG_CONTACTMAX:
		case HID_DG_TIPPRESSURE:
		case HID_DG_WIDTH:
		case HID_DG_HEIGHT:
		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;

		case 0xff000000:
		/* ignore HID features */
		return -1;
		}

		return 0;
		}

		static int mosart_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 mosart_filter_event(struct mosart_data td, struct input_dev input)
		{
		td->first = !td->first; /* touchscreen emulation */

		if (!td->valid) {
		/*
		* touchscreen emulation: if no finger in this frame is valid
		* and there previously was finger activity, this is a release
		*/
		if (!td->first && !td->activity_now && td->activity) {
		input_event(input, EV_KEY, BTN_TOUCH, 0);
		td->activity = false;
		}
		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);
		td->valid = false;

		/* touchscreen emulation: if first active finger in this frame... */
		if (!td->activity_now) {
		/* if there was no previous activity, emit touch event */
		if (!td->activity) {
		input_event(input, EV_KEY, BTN_TOUCH, 1);
		td->activity = true;
		}
		td->activity_now = true;
		/* and in any case this is our preferred finger */
		input_event(input, EV_ABS, ABS_X, td->x);
		input_event(input, EV_ABS, ABS_Y, td->y);
		}
		}


		static int mosart_event(struct hid_device hid, struct hid_field field,
		struct hid_usage *usage, __s32 value)
		{
		struct mosart_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_GD_X:
		td->x = value;
		break;
		case HID_GD_Y:
		td->y = value;
		mosart_filter_event(td, input);
		break;
		case HID_DG_CONTACTID:
		td->id = value;
		break;
		case HID_DG_CONTACTCOUNT:
		/* touch emulation: this is the last field in a frame */
		td->first = false;
		td->activity_now = false;
		break;
		case HID_DG_CONFIDENCE:
		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 mosart_probe(struct hid_device hdev, const struct hid_device_id id)
		{
		int ret;
		struct mosart_data *td;


		td = kmalloc(sizeof(struct mosart_data), GFP_KERNEL);
		if (!td) {
		dev_err(&hdev->dev, "cannot allocate MosArt data\n");
		return -ENOMEM;
		}
		td->valid = false;
		td->activity = false;
		td->activity_now = false;
		td->first = false;
		hid_set_drvdata(hdev, td);

		/* currently, it's better to have one evdev device only */
		#if 0
		hdev->quirks \|= HID_QUIRK_MULTI_INPUT;
		#endif

		ret = hid_parse(hdev);
		if (ret == 0)
		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);

		if (ret == 0) {
		struct hid_report_enum *re = hdev->report_enum
		+ HID_FEATURE_REPORT;
		struct hid_report *r = re->report_id_hash[7];

		r->field[0]->value[0] = 0x02;
		usbhid_submit_report(hdev, r, USB_DIR_OUT);
		} else
		kfree(td);

		return ret;
		}

		static void mosart_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 mosart_devices[] = {
		{ HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_T91MT) },
		{ }
		};
		MODULE_DEVICE_TABLE(hid, mosart_devices);

		static const struct hid_usage_id mosart_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 mosart_driver = {
		.name = "mosart",
		.id_table = mosart_devices,
		.probe = mosart_probe,
		.remove = mosart_remove,
		.input_mapping = mosart_input_mapping,
		.input_mapped = mosart_input_mapped,
		.usage_table = mosart_grabbed_usages,
		.event = mosart_event,
		};

		static int __init mosart_init(void)
		{
		return hid_register_driver(&mosart_driver);
		}

		static void __exit mosart_exit(void)
		{
		hid_unregister_driver(&mosart_driver);
		}

		module_init(mosart_init);
		module_exit(mosart_exit);