From a2d893177b7cb43ec3a6d4a3083606426b39cd94 Mon Sep 17 00:00:00 2001
From: "qiu.zeng" <qiu.zeng@amlogic.com>
Date: Wed, 9 Jan 2019 15:09:05 +0800
Subject: [PATCH] BT: bt mac write [1/3]

PD#OTT-1590

Problem:
bt mac write

Solution:
Accept the MAC address from uboot and create nodes

Verify:
Verifying on Public Edition P212

Change-Id: I77ff3543aff937adc07bf3a0933a350c27e9dd20
Signed-off-by: Qiu Zeng <qiu.zeng@amlogic.com>
---
 drivers/amlogic/bluetooth/bt_device.c | 64 +++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/drivers/amlogic/bluetooth/bt_device.c b/drivers/amlogic/bluetooth/bt_device.c
index e610c4ef4562..19f3bc9b26bb 100644
--- a/drivers/amlogic/bluetooth/bt_device.c
+++ b/drivers/amlogic/bluetooth/bt_device.c
@@ -32,6 +32,7 @@
 #include <linux/amlogic/iomap.h>
 #include <linux/io.h>
 #include <linux/amlogic/bt_device.h>
+#include <linux/random.h>
 #ifdef CONFIG_AM_WIFI_SD_MMC
 #include <linux/amlogic/wifi_dt.h>
 #endif
@@ -48,6 +49,48 @@ static struct early_suspend bt_early_suspend;
 
 #define BT_RFKILL "bt_rfkill"
 
+char bt_addr[18] = "";
+static struct class *bt_addr_class;
+static ssize_t bt_addr_show(struct class *cls,
+	struct class_attribute *attr, char *_buf)
+{
+	char local_addr[6];
+
+	if (!_buf)
+		return -EINVAL;
+
+	if (strlen(bt_addr) == 0) {
+		local_addr[0] = 0x22;
+		local_addr[1] = 0x22;
+		local_addr[2] = prandom_u32();
+		local_addr[3] = prandom_u32();
+		local_addr[4] = prandom_u32();
+		local_addr[5] = prandom_u32();
+		sprintf(bt_addr, "%02x:%02x:%02x:%02x:%02x:%02x",
+		local_addr[0], local_addr[1], local_addr[2],
+		local_addr[3], local_addr[4], local_addr[5]);
+	}
+
+	return sprintf(_buf, "%s\n", bt_addr);
+}
+static ssize_t bt_addr_store(struct class *cls,
+	struct class_attribute *attr, const char __user *buf, size_t count)
+{
+	int ret = -EINVAL;
+
+	if (!buf)
+		return ret;
+
+	snprintf(bt_addr, sizeof(bt_addr), "%s", buf);
+
+	if (bt_addr[strlen(bt_addr)-1] == '\n')
+		bt_addr[strlen(bt_addr)-1] = '\0';
+
+	pr_info("bt_addr=%s\n", bt_addr);
+	return count;
+}
+static CLASS_ATTR(value, 0644, bt_addr_show, bt_addr_store);
+
 struct bt_dev_runtime_data {
 	struct rfkill *bt_rfk;
 	struct bt_dev_data *pdata;
@@ -310,6 +353,9 @@ static int bt_probe(struct platform_device *pdev)
 #else
 	pdata = (struct bt_dev_data *)(pdev->dev.platform_data);
 #endif
+	bt_addr_class = class_create(THIS_MODULE, "bt_addr");
+	ret = class_create_file(bt_addr_class, &class_attr_value);
+
 	bt_device_init(pdata);
 	if (pdata->power_down_disable == 1) {
 		pdata->power_down_disable = 0;
@@ -453,3 +499,21 @@ module_exit(bt_exit);
 MODULE_DESCRIPTION("bt rfkill");
 MODULE_AUTHOR("");
 MODULE_LICENSE("GPL");
+
+/**************** bt mac *****************/
+
+static int __init mac_addr_set(char *line)
+{
+
+	if (line) {
+		pr_info("try to read bt mac from emmc key!\n");
+		strncpy(bt_addr, line, sizeof(bt_addr)-1);
+		bt_addr[sizeof(bt_addr)-1] = '\0';
+	}
+
+	return 1;
+}
+
+__setup("mac_bt=", mac_addr_set);
+
+