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Message-Id: <1487081876-9743-1-git-send-email-martyn.welch@collabora.co.uk>
Date: Tue, 14 Feb 2017 14:17:56 +0000
From: Martyn Welch <martyn.welch@...labora.co.uk>
To: Jiri Kosina <jikos@...nel.org>,
Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
Martyn Welch <martyn.welch@...labora.co.uk>
Subject: [PATCH] HID: Accutouch: Add driver for ELO Accutouch 2216 USB Touchscreens
The Accutouch 2216 is reporting BTN_LEFT/BTN_MOUSE rather than BTM_TOUCH
in it's capabilities, which is what user space expects a touchscreen
device to report. This is causing udev to consider the device to be a
"VMware's USB mouse" rather than as a touchscreen, which results in a
mouse cursor being displayed in Weston.
This patch adds a special driver for the device to correct the
capabilities reported.
Signed-off-by: Martyn Welch <martyn.welch@...labora.co.uk>
---
drivers/hid/Kconfig | 12 +++++++++++
drivers/hid/Makefile | 1 +
drivers/hid/hid-accutouch.c | 52 +++++++++++++++++++++++++++++++++++++++++++++
drivers/hid/hid-core.c | 1 +
drivers/hid/hid-ids.h | 1 +
5 files changed, 67 insertions(+)
create mode 100644 drivers/hid/hid-accutouch.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 4070b73..ba0d17a 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -98,6 +98,18 @@ config HID_A4TECH
---help---
Support for A4 tech X5 and WOP-35 / Trust 450L mice.
+config HID_ACCUTOUCH
+ tristate "Accutouch touch device"
+ depends on USB_HID
+ ---help---
+ This selects a driver for the Accutouch 2216 touch controller.
+
+ The driver works around a problem in the reported device capabilities
+ which causes userspace to detect the device as a mouse rather than
+ a touchscreen.
+
+ Say Y here if you have a Accutouch 2216 touch controller.
+
config HID_ACRUX
tristate "ACRUX game controller support"
depends on HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 4d111f2..48be3ed 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -21,6 +21,7 @@ hid-wiimote-y := hid-wiimote-core.o hid-wiimote-modules.o
hid-wiimote-$(CONFIG_DEBUG_FS) += hid-wiimote-debug.o
obj-$(CONFIG_HID_A4TECH) += hid-a4tech.o
+obj-$(CONFIG_HID_ACCUTOUCH) += hid-accutouch.o
obj-$(CONFIG_HID_ALPS) += hid-alps.o
obj-$(CONFIG_HID_ACRUX) += hid-axff.o
obj-$(CONFIG_HID_APPLE) += hid-apple.o
diff --git a/drivers/hid/hid-accutouch.c b/drivers/hid/hid-accutouch.c
new file mode 100644
index 0000000..4e28716
--- /dev/null
+++ b/drivers/hid/hid-accutouch.c
@@ -0,0 +1,52 @@
+/*
+ * HID driver for Elo Accutouch touchscreens
+ *
+ * Copyright (c) 2016, Collabora Ltd.
+ * Copyright (c) 2016, General Electric Company
+ *
+ * based on hid-penmount.c
+ * Copyright (c) 2014 Christian Gmeiner <christian.gmeiner <at> gmail.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/hid.h>
+#include <linux/module.h>
+#include "hid-ids.h"
+
+static int accutouch_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi,
+ struct hid_field *field,
+ struct hid_usage *usage,
+ unsigned long **bit, int *max)
+{
+ if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
+ hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
+ return 1;
+ }
+
+ return 0;
+}
+
+static const struct hid_device_id accutouch_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_ACCUTOUCH_2216) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, accutouch_devices);
+
+static struct hid_driver accutouch_driver = {
+ .name = "hid-accutouch",
+ .id_table = accutouch_devices,
+ .input_mapping = accutouch_input_mapping,
+};
+
+module_hid_driver(accutouch_driver);
+
+MODULE_AUTHOR("Martyn Welch <martyn.welch@...labora.co.uk");
+MODULE_DESCRIPTION("Elo Accutouch HID TouchScreen driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index ea36b55..b697491 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1893,6 +1893,7 @@ void hid_disconnect(struct hid_device *hdev)
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0009) },
{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0030) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_ACCUTOUCH_2216) },
{ HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
{ HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 350accf..9472ef2 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -362,6 +362,7 @@
#define USB_VENDOR_ID_ELO 0x04E7
#define USB_DEVICE_ID_ELO_TS2515 0x0022
#define USB_DEVICE_ID_ELO_TS2700 0x0020
+#define USB_DEVICE_ID_ELO_ACCUTOUCH_2216 0x0050
#define USB_VENDOR_ID_EMS 0x2006
#define USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II 0x0118
--
1.8.3.1
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