[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/mips/bcm63xx/nvram.c b/src/kernel/linux/v4.14/arch/mips/bcm63xx/nvram.c
new file mode 100644
index 0000000..05757ae
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/mips/bcm63xx/nvram.c
@@ -0,0 +1,98 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ * Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
+ * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
+ */
+
+#define pr_fmt(fmt) "bcm63xx_nvram: " fmt
+
+#include <linux/bcm963xx_nvram.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/if_ether.h>
+
+#include <bcm63xx_nvram.h>
+
+#define BCM63XX_DEFAULT_PSI_SIZE 64
+
+static struct bcm963xx_nvram nvram;
+static int mac_addr_used;
+
+void __init bcm63xx_nvram_init(void *addr)
+{
+ u32 crc, expected_crc;
+ u8 hcs_mac_addr[ETH_ALEN] = { 0x00, 0x10, 0x18, 0xff, 0xff, 0xff };
+
+ /* extract nvram data */
+ memcpy(&nvram, addr, BCM963XX_NVRAM_V5_SIZE);
+
+ /* check checksum before using data */
+ if (bcm963xx_nvram_checksum(&nvram, &expected_crc, &crc))
+ pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n",
+ expected_crc, crc);
+
+ /* Cable modems have a different NVRAM which is embedded in the eCos
+ * firmware and not easily extractible, give at least a MAC address
+ * pool.
+ */
+ if (BCMCPU_IS_3368()) {
+ memcpy(nvram.mac_addr_base, hcs_mac_addr, ETH_ALEN);
+ nvram.mac_addr_count = 2;
+ }
+}
+
+u8 *bcm63xx_nvram_get_name(void)
+{
+ return nvram.name;
+}
+EXPORT_SYMBOL(bcm63xx_nvram_get_name);
+
+int bcm63xx_nvram_get_mac_address(u8 *mac)
+{
+ u8 *oui;
+ int count;
+
+ if (mac_addr_used >= nvram.mac_addr_count) {
+ pr_err("not enough mac addresses\n");
+ return -ENODEV;
+ }
+
+ memcpy(mac, nvram.mac_addr_base, ETH_ALEN);
+ oui = mac + ETH_ALEN/2 - 1;
+ count = mac_addr_used;
+
+ while (count--) {
+ u8 *p = mac + ETH_ALEN - 1;
+
+ do {
+ (*p)++;
+ if (*p != 0)
+ break;
+ p--;
+ } while (p != oui);
+
+ if (p == oui) {
+ pr_err("unable to fetch mac address\n");
+ return -ENODEV;
+ }
+ }
+
+ mac_addr_used++;
+ return 0;
+}
+EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address);
+
+int bcm63xx_nvram_get_psi_size(void)
+{
+ if (nvram.psi_size > 0)
+ return nvram.psi_size;
+
+ return BCM63XX_DEFAULT_PSI_SIZE;
+}
+EXPORT_SYMBOL(bcm63xx_nvram_get_psi_size);