Staging: initial version of the nvec driver

This is an implementation of a NVidia compliant embedded controller
protocol driver. It is used on some ARM-Tegra boards for device
communication.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Kconfig

@@ -175,5 +175,7 @@ source "drivers/staging/altera-stapl/Kconfig"
 
 source "drivers/staging/mei/Kconfig"
 
+source "drivers/staging/nvec/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING

drivers/staging/Makefile

@@ -70,3 +70,4 @@ obj-$(CONFIG_TOUCHSCREEN_CLEARPAD_TM1217)	+= cptm1217/
 obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4)	+= ste_rmi4/
 obj-$(CONFIG_DRM_PSB)		+= gma500/
 obj-$(CONFIG_INTEL_MEI)		+= mei/
+obj-$(CONFIG_MFD_NVEC)		+= nvec/

drivers/staging/nvec/Kconfig

@@ -0,0 +1,27 @@
+config MFD_NVEC
+	bool "NV Tegra Embedded Controller SMBus Interface"
+	depends on I2C && GPIOLIB && ARCH_TEGRA
+	help
+	    Say Y here to enable support for a nVidia compliant embedded
+	    controller.
+
+config KEYBOARD_NVEC
+	bool "Keyboard on nVidia compliant EC"
+	depends on MFD_NVEC
+	help
+	  Say Y here to enable support for a keyboard connected to 
+	  a nVidia compliant embedded controller.
+
+config SERIO_NVEC_PS2
+	bool "PS2 on nVidia EC"
+	depends on MFD_NVEC
+	help
+	  Say Y here to enable support for a Touchpad / Mouse connected
+	  to a nVidia compliant embedded controller.
+
+config NVEC_POWER
+	bool "NVEC charger and battery"
+	depends on MFD_NVEC
+	help
+	  Say Y to enable support for battery and charger interface for
+	  nVidia compliant embedded controllers.

drivers/staging/nvec/Makefile

@@ -0,0 +1,4 @@
+obj-$(CONFIG_SERIO_NVEC_PS2)	+= nvec_ps2.o
+obj-$(CONFIG_MFD_NVEC)		+= nvec.o
+obj-$(CONFIG_NVEC_POWER) 	+= nvec_power.o
+obj-$(CONFIG_KEYBOARD_NVEC) 	+= nvec_kbd.o

drivers/staging/nvec/README

@@ -0,0 +1,14 @@
+NVEC: An NVidia compliant Embedded Controller Protocol Implemenation
+
+This is an implementation of the NVEC protocol used to communicate with an
+embedded controller (EC) via I2C bus. The EC is an I2C master while the host
+processor is the I2C slave. Requests from the host processor to the EC are
+started by triggering a gpio line.
+
+There is no written documentation of the protocol available to the public,
+but the source code[1] of the published nvec reference drivers can be a guide.
+This driver is currently only used by the AC100 project[2], but it is likely,
+that other Tegra boards (not yet mainlined, if ever) also use it.
+
+[1] e.g. http://nv-tegra.nvidia.com/gitweb/?p=linux-2.6.git;a=tree;f=arch/arm/mach-tegra/nvec;hb=android-tegra-2.6.32
+[2] http://gitorious.org/ac100, http://launchpad.net/ac100

drivers/staging/nvec/TODO

@@ -0,0 +1,8 @@
+ToDo list (incomplete, unordered)
+	- convert mouse, keyboard, and power to platform devices
+	- add copyright / driver author / license
+	- add compile as module support
+	- move nvec devices to mfd cells?
+	- adjust to kernel style
+
+

drivers/staging/nvec/nvec-keytable.h

@@ -0,0 +1,266 @@
+/*
+ * drivers/input/keyboard/tegra-nvec.c
+ *
+ * Keyboard class input driver for keyboards connected to an NvEc compliant
+ * embedded controller
+ *
+ * Copyright (c) 2009, NVIDIA Corporation.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+static unsigned short code_tab_102us[] = {
+	KEY_GRAVE,	// 0x00
+	KEY_ESC,
+	KEY_1,
+	KEY_2,
+	KEY_3,
+	KEY_4,
+	KEY_5,
+	KEY_6,
+	KEY_7,
+	KEY_8,
+	KEY_9,
+	KEY_0,
+	KEY_MINUS,
+	KEY_EQUAL,
+	KEY_BACKSPACE,
+	KEY_TAB,
+	KEY_Q,		// 0x10
+	KEY_W,
+	KEY_E,
+	KEY_R,
+	KEY_T,
+	KEY_Y,
+	KEY_U,
+	KEY_I,
+	KEY_O,
+	KEY_P,
+	KEY_LEFTBRACE,
+	KEY_RIGHTBRACE,
+	KEY_ENTER,
+	KEY_LEFTCTRL,
+	KEY_A,
+	KEY_S,
+	KEY_D,		// 0x20
+	KEY_F,
+	KEY_G,
+	KEY_H,
+	KEY_J,
+	KEY_K,
+	KEY_L,
+	KEY_SEMICOLON,
+	KEY_APOSTROPHE,
+	KEY_GRAVE,
+	KEY_LEFTSHIFT,
+	KEY_BACKSLASH,
+	KEY_Z,
+	KEY_X,
+	KEY_C,
+	KEY_V,
+	KEY_B,		// 0x30
+	KEY_N,
+	KEY_M,
+	KEY_COMMA,
+	KEY_DOT,
+	KEY_SLASH,
+	KEY_RIGHTSHIFT,
+	KEY_KPASTERISK,
+	KEY_LEFTALT,
+	KEY_SPACE,
+	KEY_CAPSLOCK,
+	KEY_F1,
+	KEY_F2,
+	KEY_F3,
+	KEY_F4,
+	KEY_F5,
+	KEY_F6,		// 0x40
+	KEY_F7,
+	KEY_F8,
+	KEY_F9,
+	KEY_F10,
+	KEY_FN,
+	0,		//VK_SCROLL
+	KEY_KP7,
+	KEY_KP8,
+	KEY_KP9,
+	KEY_KPMINUS,
+	KEY_KP4,
+	KEY_KP5,
+	KEY_KP6,
+	KEY_KPPLUS,
+	KEY_KP1,
+	KEY_KP2,	// 0x50
+	KEY_KP3,
+	KEY_KP0,
+	KEY_KPDOT,
+	KEY_MENU,		//VK_SNAPSHOT
+	KEY_POWER,
+	KEY_102ND,		//VK_OEM_102   henry+ 0x2B (43) BACKSLASH have been used,change to use 0X56 (86)
+	KEY_F11,		//VK_F11
+	KEY_F12,		//VK_F12
+	0, 
+	0, 
+	0, 
+	0, 
+	0, 
+	0, 
+	0, 
+	0, // 60 
+	0,
+	0,
+	KEY_SEARCH, // add search key map 
+	0,		
+	0,
+	0,
+	0,	
+	0,		
+	0, 
+	0, 
+	0, 
+	0, 
+	0, 
+	0, 
+	0, 
+	0, // 70 
+	0,
+	0,
+	KEY_KP5,  //73 for JP keyboard '\' key, report 0x4c
+	0,		
+	0,
+	0,
+	0,	
+	0,		
+	0, 
+	0, 
+    0, 
+	0, 
+	KEY_KP9, //7d  for JP keyboard '|' key, report 0x49
+};
+
+static unsigned short extcode_tab_us102[] = {
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,		// 0xE0 0x10
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,		//VK_MEDIA_NEXT_TRACK,
+	0,
+	0,
+	0,		//VK_RETURN,
+	KEY_RIGHTCTRL,		//VK_RCONTROL,
+	0,
+	0,
+	KEY_MUTE,	// 0xE0 0x20
+	0,		//VK_LAUNCH_APP1
+	0,		//VK_MEDIA_PLAY_PAUSE
+	0,
+	0,		//VK_MEDIA_STOP
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	KEY_VOLUMEUP,	// 0xE0 0x30
+	0,
+	0,		//VK_BROWSER_HOME
+	0,
+	0,
+	KEY_KPSLASH,	//VK_DIVIDE
+	0,
+	KEY_SYSRQ,		//VK_SNAPSHOT
+	KEY_RIGHTALT,		//VK_RMENU
+	0,		//VK_OEM_NV_BACKLIGHT_UP
+	0,		//VK_OEM_NV_BACKLIGHT_DN
+	0,		//VK_OEM_NV_BACKLIGHT_AUTOTOGGLE
+	0,		//VK_OEM_NV_POWER_INFO
+	0,		//VK_OEM_NV_WIFI_TOGGLE
+	0,		//VK_OEM_NV_DISPLAY_SELECT
+	0,		//VK_OEM_NV_AIRPLANE_TOGGLE
+	0,		//0xE0 0x40
+	KEY_LEFT,		//VK_OEM_NV_RESERVED    henry+ for JP keyboard
+	0,		//VK_OEM_NV_RESERVED
+	0,		//VK_OEM_NV_RESERVED
+	0,		//VK_OEM_NV_RESERVED
+	0,		//VK_OEM_NV_RESERVED
+	KEY_CANCEL,
+	KEY_HOME,
+	KEY_UP,
+	KEY_PAGEUP,		//VK_PRIOR
+	0,
+	KEY_LEFT,
+	0,
+	KEY_RIGHT,
+	0,
+	KEY_END,
+	KEY_DOWN,	// 0xE0 0x50
+	KEY_PAGEDOWN,		//VK_NEXT
+	KEY_INSERT,
+	KEY_DELETE,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	KEY_LEFTMETA,	//VK_LWIN
+	0,		//VK_RWIN
+	KEY_ESC,	//VK_APPS
+	KEY_KPMINUS, //for power button workaround
+	0, 
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,		//VK_BROWSER_SEARCH
+	0,		//VK_BROWSER_FAVORITES
+	0,		//VK_BROWSER_REFRESH
+	0,		//VK_BROWSER_STOP
+	0,		//VK_BROWSER_FORWARD
+	0,		//VK_BROWSER_BACK
+	0,		//VK_LAUNCH_APP2
+	0,		//VK_LAUNCH_MAIL
+	0,		//VK_LAUNCH_MEDIA_SELECT
+};
+
+static unsigned short* code_tabs[] = {code_tab_102us, extcode_tab_us102 };