HID: add support for PenMount HID TouchScreen Driver

This patch adds a seperate hid-penmount driver to work
around an issue with the HID report descriptor. The
descriptor does not contain the ContactID usage and as
result the touchscreen is represented as normal mouse
to the system.

This driver maps the button 0 emitted by the touchscreen
to BTN_TOUCH. This makes it possible to use touch events
in userspace.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index c18d5d7..f42df4d 100644 (file)
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -530,6 +530,17 @@ config PANTHERLORD_FF
          Say Y here if you have a PantherLord/GreenAsia based game controller
          or adapter and want to enable force feedback support for it.
 
+config HID_PENMOUNT
+       tristate "Penmount touch device"
+       depends on USB_HID
+       ---help---
+         This selects a driver for the PenMount 6000 touch controller.
+
+         The driver works around a problem in the report descript allowing
+         the userspace to touch events instead of mouse events.
+
+         Say Y here if you have a Penmount based touch controller.
+
 config HID_PETALYNX
        tristate "Petalynx Maxter remote control"
        depends on HID

diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 4dbac7f..e2850d8 100644 (file)
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_HID_NTRIG)               += hid-ntrig.o
 obj-$(CONFIG_HID_ORTEK)                += hid-ortek.o
 obj-$(CONFIG_HID_PRODIKEYS)    += hid-prodikeys.o
 obj-$(CONFIG_HID_PANTHERLORD)  += hid-pl.o
+obj-$(CONFIG_HID_PENMOUNT)     += hid-penmount.o
 obj-$(CONFIG_HID_PETALYNX)     += hid-petalynx.o
 obj-$(CONFIG_HID_PICOLCD)      += hid-picolcd.o
 hid-picolcd-y                  += hid-picolcd_core.o

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 12b6e67..6827196 100644 (file)
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1880,6 +1880,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
        { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
        { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
+       { HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_6000) },
        { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
        { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
 #if IS_ENABLED(CONFIG_HID_ROCCAT)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 25cd674..3943ffe 100644 (file)
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -722,6 +722,7 @@
 #define USB_DEVICE_ID_PENMOUNT_PCI     0x3500
 #define USB_DEVICE_ID_PENMOUNT_1610    0x1610
 #define USB_DEVICE_ID_PENMOUNT_1640    0x1640
+#define USB_DEVICE_ID_PENMOUNT_6000    0x6000
 
 #define USB_VENDOR_ID_PETALYNX         0x18b1
 #define USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE   0x0037

diff --git a/drivers/hid/hid-penmount.c b/drivers/hid/hid-penmount.c
new file mode 100644 (file)
index 0000000..c11dce8
--- /dev/null
+++ b/drivers/hid/hid-penmount.c
@@ -0,0 +1,49 @@
+/*
+ *  HID driver for PenMount touchscreens
+ *
+ *  Copyright (c) 2014 Christian Gmeiner <christian.gmeiner <at> gmail.com>
+ *
+ *  based on hid-penmount copyrighted by
+ *    PenMount Touch Solutions <penmount <at> seed.net.tw>
+ */
+
+/*
+ * 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/module.h>
+#include <linux/hid.h>
+#include "hid-ids.h"
+
+static int penmount_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 penmount_devices[] = {
+       { HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_6000) },
+       { }
+};
+MODULE_DEVICE_TABLE(hid, penmount_devices);
+
+static struct hid_driver penmount_driver = {
+       .name = "hid-penmount",
+       .id_table = penmount_devices,
+       .input_mapping = penmount_input_mapping,
+};
+
+module_hid_driver(penmount_driver);
+
+MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>");
+MODULE_DESCRIPTION("PenMount HID TouchScreen driver");
+MODULE_LICENSE("GPL");