Commit 6a82582d authored Feb 19, 2021 by Michael Zaidman Committed by Jiri Kosina Mar 16, 2021

HID: ft260: add usb hid to i2c host bridge driver



The FTDI FT260 chip implements USB to I2C/UART bridges through two
USB HID class interfaces. The first - for I2C, and the second for UART.
Each interface is independent, and the kernel detects it as a separate
USB hidraw device.

This commit adds I2C host adapter support.

Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com>
Tested-by: Aaron Jones (FTDI-UK) <aaron.jones@ftdichip.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

parent 69aea9d2

MAINTAINERS

+7 −0

Original line number	Diff line number	Diff line
		@@ -7278,6 +7278,13 @@ F: fs/verity/
		F: include/linux/fsverity.h
		F: include/uapi/linux/fsverity.h

		FT260 FTDI USB-HID TO I2C BRIDGE DRIVER
		M: Michael Zaidman <michael.zaidman@gmail.com>
		L: linux-i2c@vger.kernel.org
		L: linux-input@vger.kernel.org
		S: Maintained
		F: drivers/hid/hid-ft260.c

		FUJITSU LAPTOP EXTRAS
		M: Jonathan Woithe <jwoithe@just42.net>
		L: platform-driver-x86@vger.kernel.org

drivers/hid/Kconfig

+11 −0

Original line number	Diff line number	Diff line
		@@ -351,6 +351,17 @@ config HID_EZKEY
		help
		Support for Ezkey BTC 8193 keyboard.

		config HID_FT260
		tristate "FTDI FT260 USB HID to I2C host support"
		depends on USB_HID && HIDRAW && I2C
		help
		Provides I2C host adapter functionality over USB-HID through FT260
		device. The customizable USB descriptor fields are exposed as sysfs
		attributes.

		To compile this driver as a module, choose M here: the module
		will be called hid-ft260.

		config HID_GEMBIRD
		tristate "Gembird Joypad"
		depends on HID

drivers/hid/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -46,6 +46,7 @@ obj-$(CONFIG_HID_ELAN) += hid-elan.o
		obj-$(CONFIG_HID_ELECOM) += hid-elecom.o
		obj-$(CONFIG_HID_ELO) += hid-elo.o
		obj-$(CONFIG_HID_EZKEY) += hid-ezkey.o
		obj-$(CONFIG_HID_FT260) += hid-ft260.o
		obj-$(CONFIG_HID_GEMBIRD) += hid-gembird.o
		obj-$(CONFIG_HID_GFRM) += hid-gfrm.o
		obj-$(CONFIG_HID_GLORIOUS) += hid-glorious.o

drivers/hid/hid-ft260.c

0 → 100644

+1053 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/hid/hid-ids.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -430,6 +430,7 @@

		#define USB_VENDOR_ID_FUTURE_TECHNOLOGY 0x0403
		#define USB_DEVICE_ID_RETRODE2 0x97c1
		#define USB_DEVICE_ID_FT260 0x6030

		#define USB_VENDOR_ID_ESSENTIAL_REALITY 0x0d7f
		#define USB_DEVICE_ID_ESSENTIAL_REALITY_P5 0x0100