NFC: Add to support ap6441 & ap6493 nfc function.

arch/arm/boot/dts/rk3288-tb.dts

@@ -492,7 +492,23 @@
               poll_delay_ms = <30>;
               layout = <1>;
        };
-	
+
+    nfc-bcm2079x@76 {
+        compatible = "nfc-bcm2079x.ap6441";
+        reg = <0x76>;
+        en_gpio = <&gpio4 GPIO_D3 GPIO_ACTIVE_HIGH>;
+        wake_gpio = <&gpio5 GPIO_C0 GPIO_ACTIVE_HIGH>;
+        irq_gpio = <&gpio5 GPIO_B7 IRQ_TYPE_EDGE_RISING>;
+        status = "disabled";
+    };
+    nfc-bcm2079x@77 {
+        compatible = "nfc-bcm2079x.ap6493";
+        reg = <0x77>;
+        en_gpio = <&gpio4 GPIO_D3 GPIO_ACTIVE_HIGH>;
+        wake_gpio = <&gpio5 GPIO_C0 GPIO_ACTIVE_HIGH>;
+        irq_gpio = <&gpio5 GPIO_B7 IRQ_TYPE_EDGE_RISING>;
+        status = "disabled";
+    };
 };
 
 &i2c2 {

drivers/net/wireless/Kconfig

@@ -84,6 +84,7 @@ choice
 	config AP6441
 		bool "AP6441"
 		depends on RKWIFI
+		select BCM2079X_NFC
 
 	config AP6476
 		bool "AP6476"
@@ -92,6 +93,7 @@ choice
 	config AP6493
 		bool "AP6493"
 		depends on RKWIFI
+		select BCM2079X_NFC
 
 	config GB86302I
 		bool "GB86302I"

drivers/nfc/Kconfig

@@ -5,6 +5,14 @@
 menu "Near Field Communication (NFC) devices"
 	depends on NFC
 
+config BCM2079X_NFC
+    tristate "bcm2079x NFC driver"
+    depends on AP6493 && AP6441
+    default n
+    ---help---
+      Say yes if you want bcm2079x Near Field Communication driver.
+      This is for i2c connected version. If unsure, say N here.
+
 config NFC_PN533
 	tristate "NXP PN533 USB driver"
 	depends on USB

drivers/nfc/Makefile

@@ -2,6 +2,7 @@
 # Makefile for nfc devices
 #
 
+obj-$(CONFIG_BCM2079X_NFC)  += bcm2079x-i2c.o
 obj-$(CONFIG_NFC_PN544)		+= pn544/
 obj-$(CONFIG_NFC_MICROREAD)	+= microread/
 obj-$(CONFIG_NFC_PN533)		+= pn533.o

drivers/nfc/bcm2079x-i2c.c

@@ -0,0 +1,698 @@
+/*
+ * Copyright (C) 2012 Broadcom 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 St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/jiffies.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/miscdevice.h>
+#include <linux/spinlock.h>
+#include <linux/poll.h>
+#include <linux/version.h>
+#ifdef CONFIG_OF
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#endif
+
+#include <linux/bcm2079x.h>
+
+#define USE_WAKE_LOCK
+
+#ifdef USE_WAKE_LOCK
+#include <linux/wakelock.h>
+#endif
+
+#define TRUE		1
+#define FALSE		0
+#define STATE_HIGH	1
+#define STATE_LOW	0
+
+/* end of compile options */
+
+/* do not change below */
+#define MAX_BUFFER_SIZE		780
+
+	/* Read data */
+#define PACKET_HEADER_SIZE_NCI	(4)
+#define PACKET_HEADER_SIZE_HCI	(3)
+#define PACKET_TYPE_NCI		(16)
+#define PACKET_TYPE_HCIEV	(4)
+#define MAX_PACKET_SIZE		(PACKET_HEADER_SIZE_NCI + 255)
+
+struct bcm2079x_dev {
+	wait_queue_head_t read_wq;
+	struct mutex read_mutex;
+	struct i2c_client *client;
+	struct miscdevice bcm2079x_device;
+	unsigned int wake_gpio;
+	unsigned int en_gpio;
+	unsigned int irq_gpio;
+	bool irq_enabled;
+	spinlock_t irq_enabled_lock;
+	unsigned int error_write;
+	unsigned int error_read;
+	unsigned int count_read;
+	unsigned int count_irq;
+        int original_address;
+#ifdef USE_WAKE_LOCK
+        struct wake_lock wake_lock;
+#endif
+};
+
+#define BCM2079X_NAME	"bcm2079x-i2c"
+#define VERSION "AMPAK-BCM2079X-DRIVER-VERSION-1.0.0"
+unsigned int nfc_handle = -1;
+unsigned int bcm2079x_irq_handle(void *para);
+
+static void bcm2079x_init_stat(struct bcm2079x_dev *bcm2079x_dev)
+{
+	bcm2079x_dev->error_write = 0;
+	bcm2079x_dev->error_read = 0;
+	bcm2079x_dev->count_read = 0;
+	bcm2079x_dev->count_irq = 0;
+}
+
+static void bcm2079x_disable_irq(struct bcm2079x_dev *bcm2079x_dev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&bcm2079x_dev->irq_enabled_lock, flags);
+	if (bcm2079x_dev->irq_enabled) {
+		disable_irq_nosync(bcm2079x_dev->client->irq);
+		bcm2079x_dev->irq_enabled = false;
+	}
+	spin_unlock_irqrestore(&bcm2079x_dev->irq_enabled_lock, flags);
+}
+
+static void bcm2079x_enable_irq(struct bcm2079x_dev *bcm2079x_dev)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&bcm2079x_dev->irq_enabled_lock, flags);
+	if (!bcm2079x_dev->irq_enabled) {
+		bcm2079x_dev->irq_enabled = true;
+		enable_irq(bcm2079x_dev->client->irq);
+	}
+	spin_unlock_irqrestore(&bcm2079x_dev->irq_enabled_lock, flags);
+}
+
+/*
+ The alias address 0x79, when sent as a 7-bit address from the host processor
+ will match the first byte (highest 2 bits) of the default client address
+ (0x1FA) that is programmed in bcm20791.
+ When used together with the first byte (0xFA) of the byte sequence below,
+ it can be used to address the bcm20791 in a system that does not support
+ 10-bit address and change the default address to 0x38.
+ the new address can be changed by changing the CLIENT_ADDRESS below if 0x38
+ conflicts with other device on the same i2c bus.
+ */
+#define ALIAS_ADDRESS	  0x79
+
+static void set_client_addr(struct bcm2079x_dev *bcm2079x_dev, int addr)
+{
+	struct i2c_client *client = bcm2079x_dev->client;
+	client->addr = addr;
+	if (addr > 0x7F)
+		client->flags |= I2C_CLIENT_TEN;
+       else
+                client->flags &= ~I2C_CLIENT_TEN;
+
+	dev_info(&client->dev,
+		"Set client device changed to (0x%04X) flag = %04x\n",
+		client->addr, client->flags);
+}
+
+static void change_client_addr(struct bcm2079x_dev *bcm2079x_dev, int addr)
+{
+	struct i2c_client *client;
+	int ret;
+	int i;
+	int offset = 1;
+	char addr_data[] = {
+		0xFA, 0xF2, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00, 0x2A
+	};
+
+	client = bcm2079x_dev->client;
+	if ((client->flags & I2C_CLIENT_TEN) == I2C_CLIENT_TEN) {
+		client->addr = ALIAS_ADDRESS;
+		client->flags &= ~I2C_CLIENT_TEN;
+		offset = 0;
+	}
+
+	addr_data[5] = addr & 0xFF;
+	ret = 0;
+	for (i = 1; i < sizeof(addr_data) - 1; ++i)
+		ret += addr_data[i];
+	addr_data[sizeof(addr_data) - 1] = (ret & 0xFF);
+	dev_info(&client->dev,
+		 "Change client device from (0x%04X) flag = "\
+		 "%04x, addr_data[%d] = %02x\n",
+		 client->addr, client->flags, sizeof(addr_data) - 1,
+		 addr_data[sizeof(addr_data) - 1]);
+	ret = i2c_master_send(client, addr_data+offset, sizeof(addr_data)-offset);
+	if (ret != sizeof(addr_data)-offset) {
+		client->addr = ALIAS_ADDRESS;
+		client->flags &= ~I2C_CLIENT_TEN;
+		dev_info(&client->dev,
+			 "Change client device from (0x%04X) flag = "\
+			 "%04x, addr_data[%d] = %02x\n",
+			 client->addr, client->flags, sizeof(addr_data) - 1,
+			 addr_data[sizeof(addr_data) - 1]);
+		ret = i2c_master_send(client, addr_data, sizeof(addr_data));
+	}
+	client->addr = addr_data[5];
+
+	dev_info(&client->dev,
+		 "Change client device changed to (0x%04X) flag = %04x, ret = %d\n",
+		 client->addr, client->flags, ret);
+}
+
+static irqreturn_t bcm2079x_dev_irq_handler(int irq, void *dev_id)
+{
+	struct bcm2079x_dev *bcm2079x_dev = dev_id;
+	unsigned long flags;
+#ifdef USE_WAKE_LOCK
+	int wakelockcnt = 0;
+#endif
+
+	printk("%s: nfc irq handler\n", __func__);
+#ifdef USE_WAKE_LOCK
+	if(!(wakelockcnt =  wake_lock_active(&bcm2079x_dev->wake_lock )))
+	{
+		printk("irq aquire wake lock\n");
+		wake_lock(&bcm2079x_dev->wake_lock);
+	}else
+	{
+//		printk("irq wake lock count = %d\n", wakelockcnt);
+	}
+	//printk("irq handler ( wake lock %d)...\n", wakelockcnt);
+#endif
+
+	spin_lock_irqsave(&bcm2079x_dev->irq_enabled_lock, flags);
+	bcm2079x_dev->count_irq++;
+	spin_unlock_irqrestore(&bcm2079x_dev->irq_enabled_lock, flags);
+	wake_up(&bcm2079x_dev->read_wq);
+
+	return IRQ_HANDLED;
+}
+
+static unsigned int bcm2079x_dev_poll(struct file *filp, poll_table *wait)
+{
+	struct bcm2079x_dev *bcm2079x_dev = filp->private_data;
+	unsigned int mask = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bcm2079x_dev->irq_enabled_lock, flags);
+	//Platform specific API
+	//if(!__gpio_get_value(bcm2079x_dev->irq_gpio) && (bcm2079x_dev->count_irq < 1) )
+	if(!gpio_get_value(bcm2079x_dev->irq_gpio) && (bcm2079x_dev->count_irq < 1) )
+	{
+		spin_unlock_irqrestore(&bcm2079x_dev->irq_enabled_lock, flags);
+//		printk("poll wait, irq count %d, irq_gpio %d\n", bcm2079x_dev->count_irq,  bcm2079x_dev->irq_gpio  );
+		poll_wait(filp, &bcm2079x_dev->read_wq, wait);
+	}else
+	{
+		if (bcm2079x_dev->count_irq < 1)
+			bcm2079x_dev->count_irq = 1;
+
+		spin_unlock_irqrestore(&bcm2079x_dev->irq_enabled_lock, flags);
+//		printk("poll there is data to read!!! no wait any more.\n");
+		return (POLLIN | POLLRDNORM);
+	}
+
+	spin_lock_irqsave(&bcm2079x_dev->irq_enabled_lock, flags);
+	if (bcm2079x_dev->count_irq > 0)
+		mask |= POLLIN | POLLRDNORM;
+	spin_unlock_irqrestore(&bcm2079x_dev->irq_enabled_lock, flags);
+
+	return mask;
+}
+
+static ssize_t bcm2079x_dev_read(struct file *filp, char __user *buf,
+				  size_t count, loff_t *offset)
+{
+	struct bcm2079x_dev *bcm2079x_dev = filp->private_data;
+	unsigned char tmp[MAX_BUFFER_SIZE];
+	int total, len, ret;
+
+	total = 0;
+	len = 0;
+
+	if (bcm2079x_dev->count_irq > 0)
+		bcm2079x_dev->count_irq--;
+
+	bcm2079x_dev->count_read++;
+	if (count > MAX_BUFFER_SIZE)
+		count = MAX_BUFFER_SIZE;
+
+	mutex_lock(&bcm2079x_dev->read_mutex);
+
+	/** Read the first 4 bytes to include the length of the NCI or HCI packet.
+	**/
+	ret = i2c_master_recv(bcm2079x_dev->client, tmp, 4);
+	if (ret == 4) {
+		total = ret;
+		/** First byte is the packet type
+		**/
+		switch(tmp[0]) {
+			case PACKET_TYPE_NCI:
+				len = tmp[PACKET_HEADER_SIZE_NCI-1];
+				break;
+
+			case PACKET_TYPE_HCIEV:
+				len = tmp[PACKET_HEADER_SIZE_HCI-1];
+				if (len == 0)
+					total--;				/*Since payload is 0, decrement total size (from 4 to 3) */
+				else
+					len--;					/*First byte of payload is in tmp[3] already */
+				break;
+
+			default:
+				len = 0;					/*Unknown packet byte */
+				break;
+		} /* switch*/
+
+		/** make sure full packet fits in the buffer
+		**/
+		if (len > 0 && (len + total) <= count) {
+			/** read the remainder of the packet.
+			**/
+			ret = i2c_master_recv(bcm2079x_dev->client, tmp+total, len);
+			if (ret == len)
+				total += len;
+		} /* if */
+	} /* if */
+
+	mutex_unlock(&bcm2079x_dev->read_mutex);
+
+	if (total > count || copy_to_user(buf, tmp, total)) {
+		dev_err(&bcm2079x_dev->client->dev,
+			"failed to copy to user space, total = %d\n", total);
+		total = -EFAULT;
+		bcm2079x_dev->error_read++;
+	}
+
+	return total;
+}
+
+static ssize_t bcm2079x_dev_write(struct file *filp, const char __user *buf,
+				   size_t count, loff_t *offset)
+{
+	struct bcm2079x_dev *bcm2079x_dev = filp->private_data;
+	char tmp[MAX_BUFFER_SIZE];
+	int ret;
+
+	if (count > MAX_BUFFER_SIZE) {
+		dev_err(&bcm2079x_dev->client->dev, "out of memory\n");
+		return -ENOMEM;
+	}
+
+	if (copy_from_user(tmp, buf, count)) {
+		dev_err(&bcm2079x_dev->client->dev,
+			"failed to copy from user space\n");
+		return -EFAULT;
+	}
+
+	mutex_lock(&bcm2079x_dev->read_mutex);
+	/* Write data */
+
+	ret = i2c_master_send(bcm2079x_dev->client, tmp, count);
+	if (ret != count) {
+		if ((bcm2079x_dev->client->flags & I2C_CLIENT_TEN) != I2C_CLIENT_TEN && bcm2079x_dev->error_write == 0) {
+			set_client_addr(bcm2079x_dev, 0x1FA);
+			ret = i2c_master_send(bcm2079x_dev->client, tmp, count);
+			if (ret != count)
+				bcm2079x_dev->error_write++;
+		       set_client_addr(bcm2079x_dev, bcm2079x_dev->original_address);
+		} else {
+			dev_err(&bcm2079x_dev->client->dev,
+				"failed to write %d\n", ret);
+			ret = -EIO;
+			bcm2079x_dev->error_write++;
+		}
+	}
+	mutex_unlock(&bcm2079x_dev->read_mutex);
+
+	return ret;
+}
+
+static int bcm2079x_dev_open(struct inode *inode, struct file *filp)
+{
+	int ret = 0;
+
+	struct bcm2079x_dev *bcm2079x_dev = container_of(filp->private_data,
+							   struct bcm2079x_dev,
+							   bcm2079x_device);
+	filp->private_data = bcm2079x_dev;
+	bcm2079x_init_stat(bcm2079x_dev);
+	bcm2079x_enable_irq(bcm2079x_dev);
+	dev_info(&bcm2079x_dev->client->dev,
+		 "device node major=%d, minor=%d\n", imajor(inode), iminor(inode));
+
+	return ret;
+}
+
+static long bcm2079x_dev_unlocked_ioctl(struct file *filp,
+					 unsigned int cmd, unsigned long arg)
+{
+	struct bcm2079x_dev *bcm2079x_dev = filp->private_data;
+
+	switch (cmd) {
+	case BCMNFC_READ_FULL_PACKET:
+		break;
+	case BCMNFC_READ_MULTI_PACKETS:
+		break;
+	case BCMNFC_CHANGE_ADDR:
+		dev_info(&bcm2079x_dev->client->dev,
+			 "%s, BCMNFC_CHANGE_ADDR (%x, %lx):\n", __func__, cmd,
+			 arg);
+		change_client_addr(bcm2079x_dev, arg);
+		break;
+	case BCMNFC_POWER_CTL:
+		dev_info(&bcm2079x_dev->client->dev,
+			 "%s, BCMNFC_POWER_CTL (%x, %lx):\n", __func__, cmd, arg);
+		if (arg != 1)
+			set_client_addr(bcm2079x_dev, bcm2079x_dev->original_address);
+	    gpio_direction_output(bcm2079x_dev->en_gpio, arg);
+        gpio_set_value(bcm2079x_dev->en_gpio, arg);
+		break;
+	case BCMNFC_WAKE_CTL:
+		dev_info(&bcm2079x_dev->client->dev,
+			 "%s, BCMNFC_WAKE_CTL (%x, %lx):\n", __func__, cmd, arg);
+#ifdef USE_WAKE_LOCK
+		if(arg != 0)
+		{
+			while(wake_lock_active(&bcm2079x_dev->wake_lock ))
+			{
+				printk("release wake lock!!!\n");
+				wake_unlock(&bcm2079x_dev->wake_lock);
+			}
+			//wake_lock_timeout(&bcm2079x_dev->wake_lock, HZ*2);
+		}
+#endif
+	    gpio_direction_output(bcm2079x_dev->wake_gpio, arg);
+        gpio_set_value(bcm2079x_dev->wake_gpio, arg);
+		break;
+	default:
+		dev_err(&bcm2079x_dev->client->dev,
+			"%s, unknown cmd (%x, %lx)\n", __func__, cmd, arg);
+		return 0;
+	}
+
+	return 0;
+}
+
+static const struct file_operations bcm2079x_dev_fops = {
+	.owner = THIS_MODULE,
+	.llseek = no_llseek,
+	.poll = bcm2079x_dev_poll,
+	.read = bcm2079x_dev_read,
+	.write = bcm2079x_dev_write,
+	.open = bcm2079x_dev_open,
+	.unlocked_ioctl = bcm2079x_dev_unlocked_ioctl
+};
+
+unsigned int bcm2079x_irq_handle(void *para)
+{
+	bcm2079x_dev_irq_handler(0, para);
+	return 0;	
+}
+
+#ifdef CONFIG_OF
+static int nfc_platdata_parse_dt(struct device *dev, struct bcm2079x_platform_data *data)
+{
+    int ret = 0;
+    int gpio = -1;
+    enum of_gpio_flags flags;
+    struct device_node *node = dev->of_node;
+
+    if (!node)
+        return -ENODEV;
+
+    memset(data, 0, sizeof(*data));    
+
+    gpio = of_get_named_gpio_flags(node, "en_gpio", 0, &flags);
+    if (gpio_is_valid(gpio)){
+        data->en_gpio = gpio;
+        dev_err(dev, "%s: get property: en_gpio = %d\n", __func__, gpio);
+    } else ret = -1;
+    gpio = of_get_named_gpio_flags(node, "wake_gpio", 0, &flags);
+    if (gpio_is_valid(gpio)){
+        data->wake_gpio = gpio;
+        dev_err(dev, "%s: get property: wake_gpio = %d\n", __func__, gpio);
+    } else ret = -1;
+    gpio = of_get_named_gpio_flags(node, "irq_gpio", 0, &flags);
+    if (gpio_is_valid(gpio)){
+        data->irq_gpio = gpio;
+        dev_err(dev, "%s: get property: irq_gpio = %d\n", __func__, gpio);
+    } else ret = -1;
+
+    return ret;
+}
+#endif
+
+static int bcm2079x_probe(struct i2c_client *client,
+			   const struct i2c_device_id *id)
+{
+	int ret, err = -1;
+	struct bcm2079x_platform_data *platform_data;
+	struct bcm2079x_dev *bcm2079x_dev;
+
+    err = i2c_check_functionality(client->adapter, I2C_FUNC_I2C);
+    if (!err) {
+        dev_info(&client->dev, "Check I2C Functionality Failed.\n");
+        return -ENODEV;
+    }
+
+    dev_info(&client->dev, "Driver Version: %s\n", VERSION);
+	dev_info(&client->dev, "%s, probing bcm2079x driver flags = %x\n", __func__, client->flags);
+
+	platform_data = client->dev.platform_data;
+	if (platform_data == NULL) {
+#ifdef CONFIG_OF
+        platform_data = devm_kzalloc(&client->dev, sizeof(struct bcm2079x_platform_data), GFP_KERNEL);
+        if (!platform_data)
+            return -ENOMEM;
+
+        if (nfc_platdata_parse_dt(&client->dev, platform_data)) {
+#endif
+		 dev_err(&client->dev, "nfc probe fail\n");
+		 return -ENODEV;
+#ifdef CONFIG_OF
+        }
+        client->dev.platform_data = platform_data;
+#endif
+	}
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		dev_err(&client->dev, "need I2C_FUNC_I2C\n");
+		return -ENODEV;
+	}
+
+	ret = gpio_request(platform_data->irq_gpio, "nfc_int");
+	if (ret)
+		return -ENODEV;
+	ret = gpio_request(platform_data->en_gpio, "nfc_ven");
+	if (ret)
+		goto err_en;
+	ret = gpio_request(platform_data->wake_gpio, "nfc_firm");
+	if (ret)
+		goto err_firm;
+
+	gpio_direction_output(platform_data->en_gpio, 0 );
+	gpio_direction_output(platform_data->wake_gpio, 0);
+	gpio_set_value(platform_data->en_gpio, 0);
+	gpio_set_value(platform_data->wake_gpio, 0);
+
+	//gpio_direction_input(platform_data->irq_gpio );
+
+	bcm2079x_dev = kzalloc(sizeof(*bcm2079x_dev), GFP_KERNEL);
+	if (bcm2079x_dev == NULL) {
+		dev_err(&client->dev,
+			"failed to allocate memory for module data\n");
+		ret = -ENOMEM;
+		goto err_exit;
+	}
+
+	client->irq = gpio_to_irq(platform_data->irq_gpio);
+	if (client->irq == -ENXIO) {
+		dev_err(&client->dev,"[bcm2079x]: get gpio irq fail.\n");
+		goto err_exit;	
+	}
+
+	bcm2079x_dev->wake_gpio = platform_data->wake_gpio;
+	bcm2079x_dev->irq_gpio = platform_data->irq_gpio;
+	bcm2079x_dev->en_gpio = platform_data->en_gpio;
+	bcm2079x_dev->client = client;
+
+	/* init mutex and queues */
+	init_waitqueue_head(&bcm2079x_dev->read_wq);
+	mutex_init(&bcm2079x_dev->read_mutex);
+	spin_lock_init(&bcm2079x_dev->irq_enabled_lock);
+
+	bcm2079x_dev->bcm2079x_device.minor = MISC_DYNAMIC_MINOR;
+	bcm2079x_dev->bcm2079x_device.name = "bcm2079x";
+	bcm2079x_dev->bcm2079x_device.fops = &bcm2079x_dev_fops;
+
+	ret = misc_register(&bcm2079x_dev->bcm2079x_device);
+	if (ret) {
+		dev_err(&client->dev, "misc_register failed\n");
+		goto err_misc_register;
+	}
+
+	dev_info(&client->dev,
+		 "%s, saving address %d\n",
+		 __func__, client->addr);
+        bcm2079x_dev->original_address = client->addr;
+
+	/* request irq.  the irq is set whenever the chip has data available
+	 * for reading.  it is cleared when all data has been read.
+	 */
+	dev_info(&client->dev, "requesting IRQ %d with IRQF_NO_SUSPEND\n", client->irq);
+	bcm2079x_dev->irq_enabled = true;
+
+	//ret = request_irq(client->irq, bcm2079x_dev_irq_handler,
+	//		  IRQF_TRIGGER_RISING|IRQF_NO_SUSPEND, client->name, bcm2079x_dev);
+	//if (ret) {
+	//	dev_err(&client->dev, "request_irq failed\n");
+	//	goto err_request_irq_failed;
+	//}
+	//enable_irq_wake(client->irq);
+
+        //Platform specific API
+	//nfc_handle = sw_gpio_irq_request(bcm2079x_dev->irq_gpio, TRIG_EDGE_POSITIVE,
+	//					 bcm2079x_irq_handle, bcm2079x_dev);
+	
+	nfc_handle = request_irq(client->irq, bcm2079x_dev_irq_handler,
+			  IRQF_TRIGGER_RISING|IRQF_NO_SUSPEND, client->name, bcm2079x_dev);
+	if (nfc_handle != 0) {
+		dev_err(&client->dev, "request_irq failed.\n");
+		goto err_request_irq_failed;
+	}
+	enable_irq_wake(client->irq);
+
+	bcm2079x_disable_irq(bcm2079x_dev);
+	i2c_set_clientdata(client, bcm2079x_dev);
+	dev_info(&client->dev,
+		 "%s, probing bcm2079x driver exited successfully\n",
+		 __func__);
+
+#ifdef USE_WAKE_LOCK
+	wake_lock_init(&bcm2079x_dev->wake_lock , WAKE_LOCK_SUSPEND, "nfcwakelock" );
+#endif
+	return 0;
+
+err_request_irq_failed:
+	misc_deregister(&bcm2079x_dev->bcm2079x_device);
+err_misc_register:
+	mutex_destroy(&bcm2079x_dev->read_mutex);
+	kfree(bcm2079x_dev);
+err_exit:
+	gpio_free(platform_data->wake_gpio);
+err_firm:
+	gpio_free(platform_data->en_gpio);
+err_en:
+	gpio_free(platform_data->irq_gpio);
+	return ret;
+}
+
+static int bcm2079x_remove(struct i2c_client *client)
+{
+	struct bcm2079x_dev *bcm2079x_dev;
+
+	bcm2079x_dev = i2c_get_clientdata(client);
+
+	//Platform specific API
+	if (nfc_handle == 0)
+	    free_irq(client->irq, bcm2079x_dev);
+		//sw_gpio_irq_free(nfc_handle);	
+
+	misc_deregister(&bcm2079x_dev->bcm2079x_device);
+	mutex_destroy(&bcm2079x_dev->read_mutex);
+	gpio_free(bcm2079x_dev->irq_gpio);
+	gpio_free(bcm2079x_dev->en_gpio);
+	gpio_free(bcm2079x_dev->wake_gpio);
+	kfree(bcm2079x_dev);
+
+	return 0;
+}
+
+/*******************************************************************/
+/*                           AP6493                                */
+/*******************************************************************/
+//static const unsigned short normal_i2c[] = {0x77, I2C_CLIENT_END};
+/*******************************************************************/
+/*                           AP6441                                */
+/*******************************************************************/
+//static const unsigned short normal_i2c[] = {0x76, I2C_CLIENT_END};
+static const struct i2c_device_id bcm2079x_id[] = {
+    {"bcm2079x-i2c", 0},
+    {}
+};
+MODULE_DEVICE_TABLE(i2c, bcm2079x_id);
+
+static struct of_device_id bcm2079x_ids[] = {
+    { .compatible = "nfc-bcm2079x.ap6441" },
+    { .compatible = "nfc-bcm2079x.ap6493" },
+    { }
+};
+
+static struct i2c_driver bcm2079x_driver = {
+	.probe = bcm2079x_probe,
+	.remove = bcm2079x_remove,
+	.id_table = bcm2079x_id,
+	.driver = {
+		.owner = THIS_MODULE,
+		.name = "bcm2079x-i2c",
+        .of_match_table = of_match_ptr(bcm2079x_ids),
+	},
+};
+
+/*
+ * module load/unload record keeping
+ */
+
+static int __init bcm2079x_dev_init(void)
+{
+    printk("Enter %s\n", __func__);
+	return i2c_add_driver(&bcm2079x_driver);
+}
+module_init(bcm2079x_dev_init);
+
+static void __exit bcm2079x_dev_exit(void)
+{
+    printk("Enter %s\n", __func__);
+	i2c_del_driver(&bcm2079x_driver);
+}
+module_exit(bcm2079x_dev_exit);
+
+MODULE_AUTHOR("Broadcom");
+MODULE_DESCRIPTION("NFC bcm2079x driver");
+MODULE_LICENSE("GPL");

include/linux/bcm2079x.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2012 Broadcom 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _BCM2079X_H
+#define _BCM2079X_H
+
+#define BCMNFC_MAGIC	0xFA
+
+/*
+ * BCMNFC power control via ioctl
+ * BCMNFC_POWER_CTL(0): power off
+ * BCMNFC_POWER_CTL(1): power on
+ * BCMNFC_WAKE_CTL(0): wake off
+ * BCMNFC_WAKE_CTL(1): wake on
+ */
+#define BCMNFC_POWER_CTL		_IO(BCMNFC_MAGIC, 0x01)
+#define BCMNFC_CHANGE_ADDR		_IO(BCMNFC_MAGIC, 0x02)
+#define BCMNFC_READ_FULL_PACKET		_IO(BCMNFC_MAGIC, 0x03)
+#define BCMNFC_SET_WAKE_ACTIVE_STATE	_IO(BCMNFC_MAGIC, 0x04)
+#define BCMNFC_WAKE_CTL			_IO(BCMNFC_MAGIC, 0x05)
+#define BCMNFC_READ_MULTI_PACKETS	_IO(BCMNFC_MAGIC, 0x06)
+
+struct bcm2079x_platform_data {
+	unsigned int irq_gpio;
+	unsigned int en_gpio;
+	int wake_gpio;
+};
+
+#endif