HID: add n-trig digitizer support

Added quirks for the N-Trig digitizer.

Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

6 files changed, 97 insertions, 0 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 65b577eaf823..aadef9abc05d 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -187,6 +187,13 @@ config HID_MONTEREY
         ---help---
         Support for Monterey Genius KB29E.
 
+config HID_NTRIG
+        tristate "NTrig" if EMBEDDED
+        depends on USB_HID
+        default y
+        ---help---
+        Support for N-Trig touch screen.
+
 config HID_PANTHERLORD
         tristate "Pantherlord devices support" if EMBEDDED
         depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index e2294a8b2a68..7d34e8bf3de5 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_HID_GYRATION)	+= hid-gyration.o
 obj-$(CONFIG_HID_LOGITECH)      += hid-logitech.o
 obj-$(CONFIG_HID_MICROSOFT)     += hid-microsoft.o
 obj-$(CONFIG_HID_MONTEREY)      += hid-monterey.o
+obj-$(CONFIG_HID_NTRIG)         += hid-ntrig.o
 obj-$(CONFIG_HID_PANTHERLORD)   += hid-pl.o
 obj-$(CONFIG_HID_PETALYNX)      += hid-petalynx.o
 obj-$(CONFIG_HID_SAMSUNG)       += hid-samsung.o
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 8624a8fe085b..344f8fdb2824 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1292,6 +1292,7 @@ static const struct hid_device_id hid_blacklist[] = {
         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_USB) },
         { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_WIRELESS_OPTICAL_DESKTOP_3_0) },
         { HID_USB_DEVICE(USB_VENDOR_ID_MONTEREY, USB_DEVICE_ID_GENIUS_KB29E) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN) },
         { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
         { 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) },
diff --git a/drivers/hid/hid-dummy.c b/drivers/hid/hid-dummy.c
index e148f86fb58e..4a6af3cf192d 100644
--- a/drivers/hid/hid-dummy.c
+++ b/drivers/hid/hid-dummy.c
@@ -43,6 +43,9 @@ static int __init hid_dummy_init(void)
 #ifdef CONFIG_HID_MONTEREY_MODULE
         HID_COMPAT_CALL_DRIVER(monterey);
 #endif
+#ifdef CONFIG_HID_NTRIG_MODULE
+        HID_COMPAT_CALL_DRIVER(ntrig);
+#endif
 #ifdef CONFIG_HID_PANTHERLORD_MODULE
         HID_COMPAT_CALL_DRIVER(pantherlord);
 #endif
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index aae2ceca0bce..2b7b6eeae8c6 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -328,6 +328,9 @@
 #define USB_VENDOR_ID_NEC               0x073e
 #define USB_DEVICE_ID_NEC_USB_GAME_PAD  0x0301
 
+#define USB_VENDOR_ID_NTRIG                0x1b96
+#define USB_DEVICE_ID_NTRIG_TOUCH_SCREEN   0x0001
+
 #define USB_VENDOR_ID_ONTRAK            0x0a07
 #define USB_DEVICE_ID_ONTRAK_ADU100     0x0064
 
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
new file mode 100644
index 000000000000..db44fbd7bdf6
--- /dev/null
+++ b/drivers/hid/hid-ntrig.c
@@ -0,0 +1,82 @@
+/*
+ *  HID driver for some ntrig "special" devices
+ *
+ *  Copyright (c) 1999 Andreas Gal
+ *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
+ *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
+ *  Copyright (c) 2006-2007 Jiri Kosina
+ *  Copyright (c) 2007 Paul Walmsley
+ *  Copyright (c) 2008 Jiri Slaby
+ *  Copyright (c) 2008 Rafi Rubin
+ *
+ */
+
+/*
+ * 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 "hid-ids.h"
+
+#define NTRIG_DUPLICATE_USAGES  0x001
+
+#define nt_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, max, \
+                                        EV_KEY, (c))
+
+static int ntrig_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_DIGITIZER &&
+                        (usage->hid & 0xff) == 0x47) {
+                nt_map_key_clear(BTN_TOOL_DOUBLETAP);
+                return 1;
+        }
+        return 0;
+}
+
+static int ntrig_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_REL
+                        || usage->type == EV_ABS)
+                clear_bit(usage->code, *bit);
+
+        return 0;
+}
+static const struct hid_device_id ntrig_devices[] = {
+        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN),
+                .driver_data = NTRIG_DUPLICATE_USAGES },
+        { }
+};
+MODULE_DEVICE_TABLE(hid, ntrig_devices);
+
+static struct hid_driver ntrig_driver = {
+        .name = "ntrig",
+        .id_table = ntrig_devices,
+        .input_mapping = ntrig_input_mapping,
+        .input_mapped = ntrig_input_mapped,
+};
+
+static int ntrig_init(void)
+{
+        return hid_register_driver(&ntrig_driver);
+}
+
+static void ntrig_exit(void)
+{
+        hid_unregister_driver(&ntrig_driver);
+}
+
+module_init(ntrig_init);
+module_exit(ntrig_exit);
+MODULE_LICENSE("GPL");
+
+HID_COMPAT_LOAD_DRIVER(ntrig);