HID: add support for Stantum multitouch panel (d3fb5454) · Commits · git / linux-net

drivers/hid/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -247,6 +247,12 @@ config HID_SONY
		---help---
		Support for Sony PS3 controller.

		config HID_STANTUM
		tristate "Stantum" if EMBEDDED
		depends on USB_HID
		---help---
		Support for Stantum multitouch panel.

		config HID_SUNPLUS
		tristate "Sunplus" if EMBEDDED
		depends on USB_HID

drivers/hid/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -40,6 +40,7 @@ obj-$(CONFIG_HID_PETALYNX) += hid-petalynx.o
		obj-$(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

drivers/hid/hid-core.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1339,6 +1339,7 @@ static const struct hid_device_id hid_blacklist[] = {
		{ HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, USB_DEVICE_ID_MTP) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
		{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },

drivers/hid/hid-ids.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -393,6 +393,9 @@
		#define USB_DEVICE_ID_SOUNDGRAPH_IMON_FIRST 0x0034
		#define USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST 0x0046

		#define USB_VENDOR_ID_STANTUM 0x1f87
		#define USB_DEVICE_ID_MTP 0x0002

		#define USB_VENDOR_ID_SUN 0x0430
		#define USB_DEVICE_ID_RARITAN_KVM_DONGLE 0xcdab

drivers/hid/hid-stantum.c

0 → 100644

+283 −0

Original line number	Diff line number	Diff line
		/*
		* 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>

		MODULE_VERSION("0.6");
		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:
		case HID_DG_TIPPRESSURE:
		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_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);

		#if 0
		/* MT_PRESSURE does not exist yet */
		input_event(input, EV_ABS, ABS_MT_PRESSURE, sd->z);
		#endif

		input_mt_sync(input);
		sd->valid = false;
		sd->first = 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);
		}
		}


		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) {
		dev_err(&hdev->dev, "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) },
		{ }
		};
		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);