1 files changed, 98 insertions, 0 deletions

diff --git a/arch/mips/bcm63xx/nvram.c b/arch/mips/bcm63xx/nvram.c
new file mode 100644
index 000000000..05757aed0
--- /dev/null
+++ b/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);