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: NMarc Dietrich <marvin24@gmx.de>
Signed-off-by: NGreg 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

+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

+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

+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

+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

+/*
+ * 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 };

drivers/staging/nvec/nvec.c

+// #define DEBUG
+
+/* ToDo list (incomplete, unorderd)
+	- convert mouse, keyboard, and power to platform devices
+*/
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/serio.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/clk.h>
+#include <mach/iomap.h>
+#include <mach/clk.h>
+#include <linux/semaphore.h>
+#include <linux/list.h>
+#include <linux/notifier.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+#include "nvec.h"
+
+static unsigned char EC_DISABLE_EVENT_REPORTING[] =	{'\x04','\x00','\x00'};
+static unsigned char EC_ENABLE_EVENT_REPORTING[] =	{'\x04','\x00','\x01'};
+static unsigned char EC_GET_FIRMWARE_VERSION[] =	{'\x07','\x15'};
+
+static struct nvec_chip *nvec_power_handle;
+
+int nvec_register_notifier(struct nvec_chip *nvec, struct notifier_block *nb,
+				unsigned int events)
+{
+	return atomic_notifier_chain_register(&nvec->notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(nvec_register_notifier);
+
+static int nvec_status_notifier(struct notifier_block *nb, unsigned long event_type,
+				void *data)
+{
+	unsigned char *msg = (unsigned char *)data;
+	int i;
+
+	if(event_type != NVEC_CNTL)
+		return NOTIFY_DONE;
+
+	printk("unhandled msg type %ld, payload: ", event_type);
+	for (i = 0; i < msg[1]; i++)
+		printk("%0x ", msg[i+2]);
+	printk("\n");
+
+	return NOTIFY_OK;
+}
+
+void nvec_write_async(struct nvec_chip *nvec, unsigned char *data, short size)
+{
+	struct nvec_msg *msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT);
+
+	msg->data = kzalloc(size, GFP_NOWAIT);
+	msg->data[0] = size;
+	memcpy(msg->data + 1, data, size);
+	msg->size = size + 1;
+	msg->pos = 0;
+	INIT_LIST_HEAD(&msg->node);
+
+	list_add_tail(&msg->node, &nvec->tx_data);
+
+	gpio_set_value(nvec->gpio, 0);
+}
+EXPORT_SYMBOL(nvec_write_async);
+
+static void nvec_request_master(struct work_struct *work)
+{
+	struct nvec_chip *nvec = container_of(work, struct nvec_chip, tx_work);
+
+	if(!list_empty(&nvec->tx_data)) {
+		gpio_set_value(nvec->gpio, 0);
+	}
+}
+
+static int parse_msg(struct nvec_chip *nvec, struct nvec_msg *msg)
+{
+	int i;
+
+	if((msg->data[0] & 1<<7) == 0 && msg->data[3]) {
+		dev_err(nvec->dev, "ec responded %02x %02x %02x %02x\n", msg->data[0],
+			msg->data[1], msg->data[2], msg->data[3]);
+		return -EINVAL;
+	}
+
+	if ((msg->data[0] >> 7 ) == 1 && (msg->data[0] & 0x0f) == 5)
+	{
+		dev_warn(nvec->dev, "ec system event ");
+		for (i=0; i < msg->data[1]; i++)
+			dev_warn(nvec->dev, "%02x ", msg->data[2+i]);
+		dev_warn(nvec->dev, "\n");
+	}
+
+	atomic_notifier_call_chain(&nvec->notifier_list, msg->data[0] & 0x8f, msg->data);
+
+	return 0;
+}
+
+static struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec, unsigned char *data, short size)
+{
+	down(&nvec->sync_write_mutex);
+
+	nvec->sync_write_pending = (data[1] << 8) + data[0];
+	nvec_write_async(nvec, data, size);
+
+	dev_dbg(nvec->dev, "nvec_sync_write: 0x%04x\n", nvec->sync_write_pending);
+	wait_for_completion(&nvec->sync_write);
+	dev_dbg(nvec->dev, "nvec_sync_write: pong!\n");
+
+	up(&nvec->sync_write_mutex);
+
+	return nvec->last_sync_msg;
+}
+
+/* RX worker */
+static void nvec_dispatch(struct work_struct *work)
+{
+	struct nvec_chip *nvec = container_of(work, struct nvec_chip, rx_work);
+	struct nvec_msg *msg;
+
+	while(!list_empty(&nvec->rx_data))
+	{
+		msg = list_first_entry(&nvec->rx_data, struct nvec_msg, node);
+		list_del_init(&msg->node);
+
+		if(nvec->sync_write_pending == (msg->data[2] << 8) + msg->data[0])
+		{
+			dev_dbg(nvec->dev, "sync write completed!\n");
+			nvec->sync_write_pending = 0;
+			nvec->last_sync_msg = msg;
+			complete(&nvec->sync_write);
+		} else {
+			parse_msg(nvec, msg);
+			if((!msg) || (!msg->data))
+				dev_warn(nvec->dev, "attempt access zero pointer");
+			else {
+				kfree(msg->data);
+				kfree(msg);
+			}
+		}
+	}
+}
+
+static irqreturn_t i2c_interrupt(int irq, void *dev)
+{
+	unsigned long status;
+	unsigned long received;
+	unsigned char to_send;
+	struct nvec_msg *msg;
+	struct nvec_chip *nvec = (struct nvec_chip *)dev;
+	unsigned char *i2c_regs = nvec->i2c_regs;
+
+	status = readl(i2c_regs + I2C_SL_STATUS);
+
+	if(!(status & I2C_SL_IRQ))
+	{
+		dev_warn(nvec->dev, "nvec Spurious IRQ\n");
+		//Yup, handled. ahum.
+		goto handled;
+	}
+	if(status & END_TRANS && !(status & RCVD))
+	{
+		//Reenable IRQ only when even has been sent
+		//printk("Write sequence ended !\n");
+                //parse_msg(nvec);
+		nvec->state = NVEC_WAIT;
+		if(nvec->rx->size > 1)
+		{
+			list_add_tail(&nvec->rx->node, &nvec->rx_data);
+			schedule_work(&nvec->rx_work);
+		} else {
+			kfree(nvec->rx->data);
+			kfree(nvec->rx);
+		}
+		return IRQ_HANDLED;
+	} else if(status & RNW)
+	{
+		// Work around for AP20 New Slave Hw Bug. Give 1us extra.
+		// nvec/smbus/nvec_i2c_transport.c in NV`s crap for reference
+		if(status & RCVD)
+			udelay(3);
+
+		if(status & RCVD)
+		{
+			nvec->state = NVEC_WRITE;
+			//Master wants something from us. New communication
+//			dev_dbg(nvec->dev, "New read comm!\n");
+		} else {
+			//Master wants something from us from a communication we've already started
+//			dev_dbg(nvec->dev, "Read comm cont !\n");
+		}
+		//if(msg_pos<msg_size) {
+		if(list_empty(&nvec->tx_data))
+		{
+			dev_err(nvec->dev, "nvec empty tx - sending no-op\n");
+			to_send = 0x8a;
+			nvec_write_async(nvec, "\x07\x02", 2);
+//			to_send = 0x01;
+		} else {
+			msg = list_first_entry(&nvec->tx_data, struct nvec_msg, node);
+			if(msg->pos < msg->size) {
+				to_send = msg->data[msg->pos];
+				msg->pos++;
+			} else {
+				dev_err(nvec->dev, "nvec crap! %d\n", msg->size);
+				to_send = 0x01;
+			}
+
+			if(msg->pos >= msg->size)
+			{
+				list_del_init(&msg->node);
+				kfree(msg->data);
+				kfree(msg);
+				schedule_work(&nvec->tx_work);
+				nvec->state = NVEC_WAIT;
+			}
+		}
+		writel(to_send, i2c_regs + I2C_SL_RCVD);
+
+		gpio_set_value(nvec->gpio, 1);
+
+		dev_dbg(nvec->dev, "nvec sent %x\n", to_send);
+
+		goto handled;
+	} else {
+		received = readl(i2c_regs + I2C_SL_RCVD);
+		//Workaround?
+		if(status & RCVD) {
+			writel(0, i2c_regs + I2C_SL_RCVD);
+			goto handled;
+		}
+
+		if (nvec->state == NVEC_WAIT)
+		{
+			nvec->state = NVEC_READ;
+			msg = kzalloc(sizeof(struct nvec_msg), GFP_NOWAIT);
+			msg->data = kzalloc(32, GFP_NOWAIT);
+			INIT_LIST_HEAD(&msg->node);
+			nvec->rx = msg;
+		} else
+			msg = nvec->rx;
+
+		BUG_ON(msg->pos > 32);
+
+		msg->data[msg->pos] = received;
+		msg->pos++;
+		msg->size = msg->pos;
+		dev_dbg(nvec->dev, "Got %02lx from Master (pos: %d)!\n", received, msg->pos);
+	}
+handled:
+	return IRQ_HANDLED;
+}
+
+static int __devinit nvec_add_subdev(struct nvec_chip *nvec, struct nvec_subdev *subdev)
+{
+	struct platform_device *pdev;
+
+	pdev = platform_device_alloc(subdev->name, subdev->id);
+	pdev->dev.parent = nvec->dev;
+	pdev->dev.platform_data = subdev->platform_data;
+
+	return platform_device_add(pdev);
+}
+
+static void tegra_init_i2c_slave(struct nvec_platform_data *pdata, unsigned char *i2c_regs,
+					struct clk *i2c_clk)
+{
+	u32 val;
+
+	clk_enable(i2c_clk);
+	tegra_periph_reset_assert(i2c_clk);
+	udelay(2);
+	tegra_periph_reset_deassert(i2c_clk);
+
+	writel(pdata->i2c_addr>>1, i2c_regs + I2C_SL_ADDR1);
+	writel(0, i2c_regs + I2C_SL_ADDR2);
+
+	writel(0x1E, i2c_regs + I2C_SL_DELAY_COUNT);
+	val = I2C_CNFG_NEW_MASTER_SFM | I2C_CNFG_PACKET_MODE_EN |
+		(0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
+	writel(val, i2c_regs + I2C_CNFG);
+	writel(I2C_SL_NEWL, i2c_regs + I2C_SL_CNFG);
+
+	clk_disable(i2c_clk);
+}
+
+static void nvec_power_off(void)
+{
+	nvec_write_async(nvec_power_handle, EC_DISABLE_EVENT_REPORTING, 3);
+	nvec_write_async(nvec_power_handle, "\x04\x01", 2);
+}
+
+static int __devinit tegra_nvec_probe(struct platform_device *pdev)
+{
+	int err, i, ret;
+	struct clk *i2c_clk;
+	struct nvec_platform_data *pdata = pdev->dev.platform_data;
+	struct nvec_chip *nvec;
+	struct nvec_msg *msg;
+	unsigned char *i2c_regs;
+
+	nvec = kzalloc(sizeof(struct nvec_chip), GFP_KERNEL);
+	if(nvec == NULL) {
+		dev_err(&pdev->dev, "failed to reserve memory\n");
+		return -ENOMEM;
+	}
+	platform_set_drvdata(pdev, nvec);
+	nvec->dev = &pdev->dev;
+	nvec->gpio = pdata->gpio;
+	nvec->irq = pdata->irq;
+
+/*
+	i2c_clk=clk_get_sys(NULL, "i2c");
+	if(IS_ERR_OR_NULL(i2c_clk))
+		printk(KERN_ERR"No such clock tegra-i2c.2\n");
+	else
+		clk_enable(i2c_clk);
+*/
+	i2c_regs = ioremap(pdata->base, pdata->size);
+	if(!i2c_regs) {
+		dev_err(nvec->dev, "failed to ioremap registers\n");
+		goto failed;
+	}
+
+	nvec->i2c_regs = i2c_regs;
+
+	i2c_clk = clk_get_sys(pdata->clock, NULL);
+	if(IS_ERR_OR_NULL(i2c_clk)) {
+		dev_err(nvec->dev, "failed to get clock tegra-i2c.2\n");
+		goto failed;
+	}
+
+	tegra_init_i2c_slave(pdata, i2c_regs, i2c_clk);
+
+	err = request_irq(nvec->irq, i2c_interrupt, IRQF_DISABLED, "nvec", nvec);
+	if(err) {
+		dev_err(nvec->dev, "couldn't request irq");
+		goto failed;
+	}
+
+	clk_enable(i2c_clk);
+	clk_set_rate(i2c_clk, 8*80000);
+
+	/* Set the gpio to low when we've got something to say */
+	err = gpio_request(nvec->gpio, "nvec gpio");
+	if(err < 0)
+		dev_err(nvec->dev, "couldn't request gpio\n");
+
+	tegra_gpio_enable(nvec->gpio);
+	gpio_direction_output(nvec->gpio, 1);
+	gpio_set_value(nvec->gpio, 1);
+
+	ATOMIC_INIT_NOTIFIER_HEAD(&nvec->notifier_list);
+
+	init_completion(&nvec->sync_write);
+	sema_init(&nvec->sync_write_mutex, 1);
+	INIT_LIST_HEAD(&nvec->tx_data);
+	INIT_LIST_HEAD(&nvec->rx_data);
+	INIT_WORK(&nvec->rx_work, nvec_dispatch);
+	INIT_WORK(&nvec->tx_work, nvec_request_master);
+
+	/* enable event reporting */
+	nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING,
+				sizeof(EC_ENABLE_EVENT_REPORTING));
+
+	nvec_kbd_init(nvec);
+#ifdef CONFIG_SERIO_NVEC_PS2
+	nvec_ps2(nvec);
+#endif
+
+        /* setup subdevs */
+	for (i = 0; i < pdata->num_subdevs; i++) {
+		ret = nvec_add_subdev(nvec, &pdata->subdevs[i]);
+	}
+
+	nvec->nvec_status_notifier.notifier_call = nvec_status_notifier;
+	nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0);
+
+	nvec_power_handle = nvec;
+	pm_power_off = nvec_power_off;
+
+	/* Get Firmware Version */
+	msg = nvec_write_sync(nvec, EC_GET_FIRMWARE_VERSION,
+		sizeof(EC_GET_FIRMWARE_VERSION));
+
+	dev_warn(nvec->dev, "ec firmware version %02x.%02x.%02x / %02x\n",
+			msg->data[4], msg->data[5], msg->data[6], msg->data[7]);
+
+	kfree(msg->data);
+	kfree(msg);
+
+	/* unmute speakers? */
+	nvec_write_async(nvec, "\x0d\x10\x59\x94", 4);
+
+	/* enable lid switch event */
+	nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x02\x00", 7);
+
+	/* enable power button event */
+	nvec_write_async(nvec, "\x01\x01\x01\x00\x00\x80\x00", 7);
+
+	return 0;
+
+failed:
+	kfree(nvec);
+	return -ENOMEM;
+}
+
+static int __devexit tegra_nvec_remove(struct platform_device *pdev)
+{
+	// TODO: unregister
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int tegra_nvec_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct nvec_chip *nvec = platform_get_drvdata(pdev);
+
+	dev_dbg(nvec->dev, "suspending\n");
+	nvec_write_async(nvec, EC_DISABLE_EVENT_REPORTING, 3);
+	nvec_write_async(nvec, "\x04\x02", 2);
+
+	return 0;
+}
+
+static int tegra_nvec_resume(struct platform_device *pdev) {
+
+	struct nvec_chip *nvec = platform_get_drvdata(pdev);
+
+	dev_dbg(nvec->dev, "resuming\n");
+	nvec_write_async(nvec, EC_ENABLE_EVENT_REPORTING, 3);
+
+	return 0;
+}
+
+#else
+#define tegra_nvec_suspend NULL
+#define tegra_nvec_resume NULL
+#endif
+
+static struct platform_driver nvec_device_driver =
+{
+	.probe = tegra_nvec_probe,
+	.remove = __devexit_p(tegra_nvec_remove),
+	.suspend = tegra_nvec_suspend,
+	.resume = tegra_nvec_resume,
+	.driver = {
+		.name = "nvec",
+		.owner = THIS_MODULE,
+	}
+};
+
+static int __init tegra_nvec_init(void)
+{
+	return platform_driver_register(&nvec_device_driver);
+}
+
+module_init(tegra_nvec_init);
+MODULE_ALIAS("platform:nvec");

drivers/staging/nvec/nvec.h

+#ifndef __LINUX_MFD_NVEC
+#define __LINUX_MFD_NVEC
+
+#include <linux/semaphore.h>
+
+typedef enum {
+	NVEC_2BYTES,
+	NVEC_3BYTES,
+	NVEC_VAR_SIZE
+} nvec_size;
+
+typedef enum {
+	NOT_REALLY,
+	YES,
+	NOT_AT_ALL,
+} how_care;
+
+typedef enum {
+	NVEC_SYS=1,
+	NVEC_BAT,
+	NVEC_KBD = 5,
+	NVEC_PS2,
+	NVEC_CNTL,
+	NVEC_KB_EVT = 0x80,
+	NVEC_PS2_EVT
+} nvec_event;
+
+typedef enum {
+       NVEC_WAIT,
+       NVEC_READ,
+       NVEC_WRITE
+} nvec_state;
+
+struct nvec_msg {
+	unsigned char *data;
+	unsigned short size;
+	unsigned short pos;
+	struct list_head node;
+};
+
+struct nvec_subdev {
+	const char *name;
+	void *platform_data;
+	int id;
+};
+
+struct nvec_platform_data {
+	int num_subdevs;
+	int i2c_addr;
+	int gpio;
+	int irq;
+	int base;
+	int size;
+	char clock[16];
+	struct nvec_subdev *subdevs;
+};
+
+struct nvec_chip {
+	struct device *dev;
+	int gpio;
+	int irq;
+	unsigned char *i2c_regs;
+	nvec_state state;
+	struct atomic_notifier_head notifier_list;
+	struct list_head rx_data, tx_data;
+	struct notifier_block nvec_status_notifier;
+	struct work_struct rx_work, tx_work;
+	struct nvec_msg *rx, *tx;
+
+/* sync write stuff */
+	struct semaphore sync_write_mutex;
+	struct completion sync_write;
+	u16 sync_write_pending;
+	struct nvec_msg *last_sync_msg;
+};
+
+extern void nvec_write_async(struct nvec_chip *nvec, unsigned char *data, short size);
+
+extern int nvec_register_notifier(struct nvec_chip *nvec,
+		 struct notifier_block *nb, unsigned int events);
+
+extern int nvec_unregister_notifier(struct device *dev,
+		struct notifier_block *nb, unsigned int events);
+
+const char *nvec_send_msg(unsigned char *src, unsigned char *dst_size, how_care care_resp, void (*rt_handler)(unsigned char *data));
+
+extern int nvec_ps2(struct nvec_chip *nvec);
+extern int nvec_kbd_init(struct nvec_chip *nvec);
+
+#define I2C_CNFG			0x00
+#define I2C_CNFG_PACKET_MODE_EN		(1<<10)
+#define I2C_CNFG_NEW_MASTER_SFM		(1<<11)
+#define I2C_CNFG_DEBOUNCE_CNT_SHIFT	12
+
+#define I2C_SL_CNFG		0x20
+#define I2C_SL_NEWL		(1<<2)
+#define I2C_SL_NACK		(1<<1)
+#define I2C_SL_RESP		(1<<0)
+#define I2C_SL_IRQ		(1<<3)
+#define END_TRANS		(1<<4)
+#define RCVD			(1<<2)
+#define RNW			(1<<1)
+
+#define I2C_SL_RCVD		0x24
+#define I2C_SL_STATUS		0x28
+#define I2C_SL_ADDR1		0x2c
+#define I2C_SL_ADDR2		0x30
+#define I2C_SL_DELAY_COUNT	0x3c
+
+#endif

drivers/staging/nvec/nvec_kbd.c

+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/delay.h>
+#include "nvec-keytable.h"
+#include "nvec.h"
+
+#define ACK_KBD_EVENT {'\x05','\xed','\x01'}
+
+static unsigned char keycodes[ARRAY_SIZE(code_tab_102us)
+			+ ARRAY_SIZE(extcode_tab_us102)];
+
+struct nvec_keys {
+	struct input_dev *input;
+	struct notifier_block notifier;
+	struct nvec_chip *nvec;
+};
+
+static struct nvec_keys keys_dev;
+
+static int nvec_keys_notifier(struct notifier_block *nb,
+				unsigned long event_type, void *data)
+{
+	int code, state;
+	unsigned char *msg = (unsigned char *)data;
+
+	if (event_type == NVEC_KB_EVT) {
+		nvec_size _size = (msg[0] & (3 << 5)) >> 5;
+
+/* power on/off button */
+		if(_size == NVEC_VAR_SIZE)
+			return NOTIFY_STOP;
+
+		if(_size == NVEC_3BYTES)
+			msg++;
+
+		code = msg[1] & 0x7f;
+		state = msg[1] & 0x80;
+
+		input_report_key(keys_dev.input, code_tabs[_size][code], !state);
+		input_sync(keys_dev.input);
+
+		return NOTIFY_STOP;
+	}
+
+	return NOTIFY_DONE;
+}
+
+static int nvec_kbd_event(struct input_dev *dev, unsigned int type,
+				unsigned int code, int value)
+{
+	unsigned char buf[] = ACK_KBD_EVENT;
+	struct nvec_chip *nvec = keys_dev.nvec;
+
+	if(type==EV_REP)
+		return 0;
+
+	if(type!=EV_LED)
+		return -1;
+
+	if(code!=LED_CAPSL)
+		return -1;
+
+	buf[2] = !!value;
+	nvec_write_async(nvec, buf, sizeof(buf));
+
+	return 0;
+}
+
+int __init nvec_kbd_init(struct nvec_chip *nvec)
+{
+	int i, j, err;
+	struct input_dev *idev;
+
+	j = 0;
+
+	for(i = 0; i < ARRAY_SIZE(code_tab_102us); ++i)
+		keycodes[j++] = code_tab_102us[i];
+
+	for(i = 0; i < ARRAY_SIZE(extcode_tab_us102); ++i)
+		keycodes[j++]=extcode_tab_us102[i];
+
+	idev = input_allocate_device();
+	idev->name = "Tegra nvec keyboard";
+	idev->phys = "i2c3_slave/nvec";
+	idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_LED);
+	idev->ledbit[0] = BIT_MASK(LED_CAPSL);
+	idev->event = nvec_kbd_event;
+	idev->keycode = keycodes;
+	idev->keycodesize = sizeof(unsigned char);
+	idev->keycodemax = ARRAY_SIZE(keycodes);
+
+	for( i = 0; i < ARRAY_SIZE(keycodes); ++i)
+		set_bit(keycodes[i], idev->keybit);
+
+	clear_bit(0, idev->keybit);
+	err = input_register_device(idev);
+	if(err)
+		goto fail;
+
+	keys_dev.input = idev;
+	keys_dev.notifier.notifier_call = nvec_keys_notifier;
+	keys_dev.nvec = nvec;
+	nvec_register_notifier(nvec, &keys_dev.notifier, 0);
+
+	/* Enable keyboard */
+	nvec_write_async(nvec, "\x05\xf4", 2);
+
+	/* keyboard reset? */
+	nvec_write_async(nvec, "\x05\x03\x01\x01", 4);
+	nvec_write_async(nvec, "\x05\x04\x01", 3);
+	nvec_write_async(nvec, "\x06\x01\xff\x03", 4);
+/*	FIXME
+	wait until keyboard reset is finished
+	or until we have a sync write */
+	mdelay(1000);
+
+	return 0;
+
+fail:
+	input_free_device(idev);
+	return err;
+}

drivers/staging/nvec/nvec_power.c

+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include "nvec.h"
+
+struct nvec_power
+{
+	struct notifier_block notifier;
+	struct delayed_work poller;
+	struct nvec_chip *nvec;
+	int on;
+	int bat_present;
+	int bat_status;
+	int bat_voltage_now;
+	int bat_current_now;
+	int bat_current_avg;
+	int time_remain;
+	int charge_full_design;
+	int charge_last_full;
+	int critical_capacity;
+	int capacity_remain;
+	int bat_temperature;
+	int bat_cap;
+	int bat_type_enum;
+	char bat_manu[30];
+	char bat_model[30];
+	char bat_type[30];
+};
+
+enum {
+	SLOT_STATUS,
+	VOLTAGE,
+	TIME_REMAINING,
+	CURRENT,
+	AVERAGE_CURRENT,
+	AVERAGING_TIME_INTERVAL,
+	CAPACITY_REMAINING,
+	LAST_FULL_CHARGE_CAPACITY,
+	DESIGN_CAPACITY,
+	CRITICAL_CAPACITY,
+	TEMPERATURE,
+	MANUFACTURER,
+	MODEL,
+	TYPE,
+};
+
+enum {
+	AC,
+	BAT,
+};
+
+struct bat_response {
+	u8 event_type;
+	u8 length;
+	u8 sub_type;
+	u8 status;
+	union { /* payload */
+		char plc[30];
+		u16 plu;
+		s16 pls;
+	};
+};
+
+static struct power_supply nvec_bat_psy;
+static struct power_supply nvec_psy;
+
+static int nvec_power_notifier(struct notifier_block *nb,
+				 unsigned long event_type, void *data)
+{
+	struct nvec_power *power = container_of(nb, struct nvec_power, notifier);
+	struct bat_response *res = (struct bat_response *)data;
+
+	if (event_type != NVEC_SYS)
+		return NOTIFY_DONE;
+
+	if(res->sub_type == 0)
+	{
+		if (power->on != res->plu)
+		{
+			power->on = res->plu;
+			power_supply_changed(&nvec_psy);
+		}
+		return NOTIFY_STOP;
+	}
+	return NOTIFY_OK;
+}
+
+static const int bat_init[] =
+{
+	LAST_FULL_CHARGE_CAPACITY, DESIGN_CAPACITY, CRITICAL_CAPACITY,
+	MANUFACTURER, MODEL, TYPE,
+};
+
+static void get_bat_mfg_data(struct nvec_power *power)
+{
+	int i;
+	char buf[] = { '\x02', '\x00' };
+
+	for (i = 0; i < ARRAY_SIZE(bat_init); i++)
+	{
+		buf[1] = bat_init[i];
+		nvec_write_async(power->nvec, buf, 2);
+	}
+}
+
+static int nvec_power_bat_notifier(struct notifier_block *nb,
+				 unsigned long event_type, void *data)
+{
+	struct nvec_power *power = container_of(nb, struct nvec_power, notifier);
+	struct bat_response *res = (struct bat_response *)data;
+	int status_changed = 0;
+
+	if (event_type != NVEC_BAT)
+		return NOTIFY_DONE;
+
+	switch(res->sub_type)
+	{
+		case SLOT_STATUS:
+			if (res->plc[0] & 1)
+			{
+				if (power->bat_present == 0)
+				{
+					status_changed = 1;
+					get_bat_mfg_data(power);
+				}
+
+				power->bat_present = 1;
+
+				switch ((res->plc[0] >> 1) & 3)
+				{
+					case 0:
+						power->bat_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+						break;
+					case 1:
+						power->bat_status = POWER_SUPPLY_STATUS_CHARGING;
+						break;
+					case 2:
+						power->bat_status = POWER_SUPPLY_STATUS_DISCHARGING;
+						break;
+					default:
+						power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
+				}
+			} else {
+				if (power->bat_present == 1)
+					status_changed = 1;
+
+				power->bat_present = 0;
+				power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
+			}
+			power->bat_cap = res->plc[1];
+			if (status_changed)
+				power_supply_changed(&nvec_bat_psy);
+			break;
+		case VOLTAGE:
+			power->bat_voltage_now = res->plu * 1000;
+			break;
+		case TIME_REMAINING:
+			power->time_remain = res->plu * 3600;
+			break;
+		case CURRENT:
+			power->bat_current_now = res->pls * 1000;
+			break;
+		case AVERAGE_CURRENT:
+			power->bat_current_avg = res->pls * 1000;
+			break;
+		case CAPACITY_REMAINING:
+			power->capacity_remain = res->plu * 1000;
+			break;
+		case LAST_FULL_CHARGE_CAPACITY:
+			power->charge_last_full = res->plu * 1000;
+			break;
+		case DESIGN_CAPACITY:
+			power->charge_full_design = res->plu * 1000;
+			break;
+		case CRITICAL_CAPACITY:
+			power->critical_capacity = res->plu * 1000;
+			break;
+		case TEMPERATURE:
+			power->bat_temperature = res->plu - 2732;
+			break;
+		case MANUFACTURER:
+			memcpy(power->bat_manu, &res->plc, res->length-2);
+			power->bat_model[res->length-2] = '\0';
+			break;
+		case MODEL:
+			memcpy(power->bat_model, &res->plc, res->length-2);
+			power->bat_model[res->length-2] = '\0';
+			break;
+		case TYPE:
+			memcpy(power->bat_type, &res->plc, res->length-2);
+			power->bat_type[res->length-2] = '\0';
+			/* this differs a little from the spec
+			   fill in more if you find some */
+			if (!strncmp(power->bat_type, "Li", 30))
+				power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_LION;
+			else
+				power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+			break;
+		default:
+			return NOTIFY_STOP;
+	}
+
+	return NOTIFY_STOP;
+}
+
+static int nvec_power_get_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	struct nvec_power *power = dev_get_drvdata(psy->dev->parent);
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = power->on;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int nvec_battery_get_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	struct nvec_power *power = dev_get_drvdata(psy->dev->parent);
+
+	switch(psp)
+	{
+		case POWER_SUPPLY_PROP_STATUS:
+			val->intval = power->bat_status;
+			break;
+		case POWER_SUPPLY_PROP_CAPACITY:
+			val->intval = power->bat_cap;
+			break;
+		case POWER_SUPPLY_PROP_PRESENT:
+			val->intval = power->bat_present;
+			break;
+		case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+			val->intval = power->bat_voltage_now;
+			break;
+		case POWER_SUPPLY_PROP_CURRENT_NOW:
+			val->intval = power->bat_current_now;
+			break;
+		case POWER_SUPPLY_PROP_CURRENT_AVG:
+			val->intval = power->bat_current_avg;
+			break;
+		case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
+			val->intval = power->time_remain;
+			break;
+		case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+			val->intval = power->charge_full_design;
+			break;
+		case POWER_SUPPLY_PROP_CHARGE_FULL:
+			val->intval = power->charge_last_full;
+			break;
+		case POWER_SUPPLY_PROP_CHARGE_EMPTY:
+			val->intval = power->critical_capacity;
+			break;
+		case POWER_SUPPLY_PROP_CHARGE_NOW:
+			val->intval = power->capacity_remain;
+			break;
+		case POWER_SUPPLY_PROP_TEMP:
+			val->intval = power->bat_temperature;
+			break;
+		case POWER_SUPPLY_PROP_MANUFACTURER:
+			val->strval = power->bat_manu;
+			break;
+		case POWER_SUPPLY_PROP_MODEL_NAME:
+			val->strval = power->bat_model;
+			break;
+		case POWER_SUPPLY_PROP_TECHNOLOGY:
+			val->intval = power->bat_type_enum;
+			break;
+		default:
+			return -EINVAL;
+		}
+	return 0;
+}
+
+static enum power_supply_property nvec_power_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static enum power_supply_property nvec_battery_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+#ifdef EC_FULL_DIAG
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+#endif
+	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+	POWER_SUPPLY_PROP_CHARGE_FULL,
+	POWER_SUPPLY_PROP_CHARGE_EMPTY,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+	POWER_SUPPLY_PROP_MANUFACTURER,
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+};
+
+static char *nvec_power_supplied_to[] = {
+	"battery",
+};
+
+static struct power_supply nvec_bat_psy = {
+	.name		= "battery",
+	.type		= POWER_SUPPLY_TYPE_BATTERY,
+	.properties	= nvec_battery_props,
+	.num_properties	= ARRAY_SIZE(nvec_battery_props),
+	.get_property	= nvec_battery_get_property,
+};
+
+static struct power_supply nvec_psy = {
+	.name = "ac",
+	.type = POWER_SUPPLY_TYPE_MAINS,
+	.supplied_to = nvec_power_supplied_to,
+	.num_supplicants = ARRAY_SIZE(nvec_power_supplied_to),
+	.properties = nvec_power_props,
+	.num_properties = ARRAY_SIZE(nvec_power_props),
+	.get_property = nvec_power_get_property,
+};
+
+static int counter = 0;
+static int const bat_iter[] =
+{
+	SLOT_STATUS, VOLTAGE, CURRENT, CAPACITY_REMAINING,
+#ifdef EC_FULL_DIAG
+	AVERAGE_CURRENT, TEMPERATURE, TIME_REMAINING,
+#endif
+};
+
+static void nvec_power_poll(struct work_struct *work)
+{
+	char buf[] = { '\x01', '\x00' };
+	struct nvec_power *power = container_of(work, struct nvec_power,
+		 poller.work);
+
+	if (counter >= ARRAY_SIZE(bat_iter))
+		counter = 0;
+
+/* AC status via sys req */
+	nvec_write_async(power->nvec, buf, 2);
+	msleep(100);
+
+/* select a battery request function via round robin
+   doing it all at once seems to overload the power supply */
+	buf[0] = '\x02'; /* battery */
+        buf[1] = bat_iter[counter++];
+	nvec_write_async(power->nvec, buf, 2);
+
+//	printk("%02x %02x\n", buf[0], buf[1]);
+
+	schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(5000));
+};
+
+static int __devinit nvec_power_probe(struct platform_device *pdev)
+{
+	struct power_supply *psy;
+	struct nvec_power *power = kzalloc(sizeof(struct nvec_power), GFP_NOWAIT);
+	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
+
+	dev_set_drvdata(&pdev->dev, power);
+	power->nvec = nvec;
+
+	switch (pdev->id) {
+	case AC:
+		psy = &nvec_psy;
+
+		power->notifier.notifier_call = nvec_power_notifier;
+
+		INIT_DELAYED_WORK(&power->poller, nvec_power_poll);
+		schedule_delayed_work(&power->poller, msecs_to_jiffies(5000));
+		break;
+	case BAT:
+		psy = &nvec_bat_psy;
+
+                power->notifier.notifier_call = nvec_power_bat_notifier;
+		break;
+	default:
+		kfree(power);
+		return -ENODEV;
+	}
+
+	nvec_register_notifier(nvec, &power->notifier, NVEC_SYS);
+
+	if (pdev->id == BAT)
+		get_bat_mfg_data(power);
+
+	return power_supply_register(&pdev->dev, psy);
+}
+
+static struct platform_driver nvec_power_driver = {
+	.probe = nvec_power_probe,
+//	.remove = __devexit_p(nvec_power_remove),
+	.driver = {
+		.name = "nvec-power",
+		.owner = THIS_MODULE,
+	}
+};
+
+static int __init nvec_power_init(void) 
+{
+	return platform_driver_register(&nvec_power_driver);
+}
+
+module_init(nvec_power_init);
+
+MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("NVEC battery and AC driver");
+MODULE_ALIAS("platform:nvec-power");

drivers/staging/nvec/nvec_ps2.c

+#include <linux/slab.h>
+#include <linux/serio.h>
+#include <linux/delay.h>
+#include "nvec.h"
+
+#define START_STREAMING	{'\x06','\x03','\x01'}
+#define STOP_STREAMING	{'\x06','\x04'}
+#define SEND_COMMAND	{'\x06','\x01','\xf4','\x01'}
+
+struct nvec_ps2
+{
+	struct serio *ser_dev;
+	struct notifier_block notifier;
+	struct nvec_chip *nvec;
+};
+
+static struct nvec_ps2 ps2_dev;
+
+static int ps2_startstreaming(struct serio *ser_dev)
+{
+	unsigned char buf[] = START_STREAMING;
+	nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+	return 0;
+}
+
+static void ps2_stopstreaming(struct serio *ser_dev)
+{
+	unsigned char buf[] = STOP_STREAMING;
+	nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+}
+
+/* is this really needed?
+static void nvec_resp_handler(unsigned char *data) {
+	serio_interrupt(ser_dev, data[4], 0);
+}
+*/
+
+static int ps2_sendcommand(struct serio *ser_dev, unsigned char cmd)
+{
+	unsigned char buf[] = SEND_COMMAND;
+
+	buf[2] = cmd & 0xff;
+
+	dev_dbg(&ser_dev->dev, "Sending ps2 cmd %02x\n", cmd);
+	nvec_write_async(ps2_dev.nvec, buf, sizeof(buf));
+
+	return 0;
+}
+
+static int nvec_ps2_notifier(struct notifier_block *nb,
+				unsigned long event_type, void *data)
+{
+	int i;
+	unsigned char *msg = (unsigned char *)data;
+
+	switch (event_type) {
+		case NVEC_PS2_EVT:
+			serio_interrupt(ps2_dev.ser_dev, msg[2], 0);
+			return NOTIFY_STOP;
+
+		case NVEC_PS2:
+			if (msg[2] == 1)
+				for(i = 0; i < (msg[1] - 2); i++)
+					serio_interrupt(ps2_dev.ser_dev, msg[i+4], 0);
+			else if (msg[1] != 2) /* !ack */
+			{
+				printk("nvec_ps2: unhandled mouse event ");
+				for(i = 0; i <= (msg[1]+1); i++)
+					printk("%02x ", msg[i]);
+				printk(".\n");
+			}
+
+			return NOTIFY_STOP;
+	}
+
+	return NOTIFY_DONE;
+}
+
+
+int __init nvec_ps2(struct nvec_chip *nvec)
+{
+	struct serio *ser_dev = kzalloc(sizeof(struct serio), GFP_KERNEL);
+
+	ser_dev->id.type=SERIO_8042;
+	ser_dev->write=ps2_sendcommand;
+	ser_dev->open=ps2_startstreaming;
+	ser_dev->close=ps2_stopstreaming;
+
+	strlcpy(ser_dev->name, "NVEC PS2", sizeof(ser_dev->name));
+	strlcpy(ser_dev->phys, "NVEC I2C slave", sizeof(ser_dev->phys));
+
+	ps2_dev.ser_dev = ser_dev;
+	ps2_dev.notifier.notifier_call = nvec_ps2_notifier;
+	ps2_dev.nvec = nvec;
+	nvec_register_notifier(nvec, &ps2_dev.notifier, 0);
+
+	serio_register_port(ser_dev);
+
+	/* mouse reset */
+	nvec_write_async(nvec, "\x06\x01\xff\x03", 4);
+
+	return 0;
+}