HID: nvidia-shield: Initial driver implementation with Thunderstrike support

Supports the Thunderstrike (SHIELD 2017) controller. Implements support for
the Thunderstrike HOSTCMD firmware interface. Adds sysfs attributes about a
SHIELD device and introduces haptics support for controllers.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

MAINTAINERS

@@ -9155,6 +9155,12 @@ L:	linux-input@vger.kernel.org
 S:	Maintained
 F:	drivers/hid/hid-pxrc.c
 
+HID NVIDIA SHIELD DRIVER
+M:	Rahul Rameshbabu <rrameshbabu@nvidia.com>
+L:	linux-input@vger.kernel.org
+S:	Maintained
+F:	drivers/hid/hid-nvidia-shield.c
+
 HID PLAYSTATION DRIVER
 M:	Roderick Colenbrander <roderick.colenbrander@sony.com>
 L:	linux-input@vger.kernel.org

drivers/hid/Kconfig

@@ -788,6 +788,24 @@ config HID_NTRIG
 	help
 	Support for N-Trig touch screen.
 
+config HID_NVIDIA_SHIELD
+	tristate "NVIDIA SHIELD devices"
+	depends on USB_HID
+	depends on BT_HIDP
+	help
+	  Support for NVIDIA SHIELD accessories.
+
+	  Supported devices:
+	  - Thunderstrike (NVIDIA SHIELD Controller 2017)
+
+config NVIDIA_SHIELD_FF
+	bool "NVIDIA SHIELD force feedback support"
+	depends on HID_NVIDIA_SHIELD
+	select INPUT_FF_MEMLESS
+	help
+	  Say Y here if you would like to enable force feedback support for
+	  NVIDIA SHIELD accessories with haptics capabilities.
+
 config HID_ORTEK
 	tristate "Ortek PKB-1700/WKB-2000/Skycable wireless keyboard and mouse trackpad"
 	help

drivers/hid/Makefile

@@ -87,6 +87,7 @@ obj-$(CONFIG_HID_MULTITOUCH)	+= hid-multitouch.o
 obj-$(CONFIG_HID_NINTENDO)	+= hid-nintendo.o
 obj-$(CONFIG_HID_NTI)			+= hid-nti.o
 obj-$(CONFIG_HID_NTRIG)		+= hid-ntrig.o
+obj-$(CONFIG_HID_NVIDIA_SHIELD)	+= hid-nvidia-shield.o
 obj-$(CONFIG_HID_ORTEK)		+= hid-ortek.o
 obj-$(CONFIG_HID_PRODIKEYS)	+= hid-prodikeys.o
 obj-$(CONFIG_HID_PANTHERLORD)	+= hid-pl.o

drivers/hid/hid-ids.h

@@ -1005,6 +1005,9 @@
 #define USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18   0x0014
 #define USB_DEVICE_ID_NTRIG_DUOSENSE 0x1500
 
+#define USB_VENDOR_ID_NVIDIA				0x0955
+#define USB_DEVICE_ID_NVIDIA_THUNDERSTRIKE_CONTROLLER	0x7214
+
 #define USB_VENDOR_ID_ONTRAK		0x0a07
 #define USB_DEVICE_ID_ONTRAK_ADU100	0x0064