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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- */
- #include <cpu_func.h>
- #include <dm.h>
- #include <env.h>
- #include <init.h>
- #include <log.h>
- #include <linux/bitops.h>
- #include <linux/bug.h>
- #include <linux/delay.h>
- #include <misc.h>
- #include <spl.h>
- #include <asm/sections.h>
- /*
- * This define is a value used for error/unknown serial.
- * If we really care about distinguishing errors and 0 is
- * valid, we'll need a different one.
- */
- #define ERROR_READING_SERIAL_NUMBER 0
- #ifdef CONFIG_MISC_INIT_R
- #if CONFIG_IS_ENABLED(SIFIVE_OTP)
- static u32 otp_read_serialnum(struct udevice *dev)
- {
- int ret;
- u32 serial[2] = {0};
- for (int i = 0xfe * 4; i > 0; i -= 8) {
- ret = misc_read(dev, i, serial, sizeof(serial));
- if (ret != sizeof(serial)) {
- printf("%s: error reading serial from OTP\n", __func__);
- break;
- }
- if (serial[0] == ~serial[1])
- return serial[0];
- }
- return ERROR_READING_SERIAL_NUMBER;
- }
- #endif
- static u32 fu540_read_serialnum(void)
- {
- u32 serial = ERROR_READING_SERIAL_NUMBER;
- #if CONFIG_IS_ENABLED(SIFIVE_OTP)
- struct udevice *dev;
- int ret;
- /* init OTP */
- ret = uclass_get_device_by_driver(UCLASS_MISC,
- DM_DRIVER_GET(sifive_otp), &dev);
- if (ret) {
- debug("%s: could not find otp device\n", __func__);
- return serial;
- }
- /* read serial from OTP and set env var */
- serial = otp_read_serialnum(dev);
- #endif
- return serial;
- }
- static void fu540_setup_macaddr(u32 serialnum)
- {
- /* Default MAC address */
- unsigned char mac[6] = { 0x70, 0xb3, 0xd5, 0x92, 0xf0, 0x00 };
- /*
- * We derive our board MAC address by ORing last three bytes
- * of board serial number to above default MAC address.
- *
- * This logic of deriving board MAC address is taken from
- * SiFive FSBL and is kept unchanged.
- */
- mac[5] |= (serialnum >> 0) & 0xff;
- mac[4] |= (serialnum >> 8) & 0xff;
- mac[3] |= (serialnum >> 16) & 0xff;
- /* Update environment variable */
- eth_env_set_enetaddr("ethaddr", mac);
- }
- int misc_init_r(void)
- {
- u32 serial_num;
- char buf[9] = {0};
- /* Set ethaddr environment variable from board serial number */
- if (!env_get("serial#")) {
- serial_num = fu540_read_serialnum();
- if (!serial_num) {
- WARN(true, "Board serial number should not be 0 !!\n");
- return 0;
- }
- snprintf(buf, sizeof(buf), "%08x", serial_num);
- env_set("serial#", buf);
- fu540_setup_macaddr(serial_num);
- }
- return 0;
- }
- #endif
- void *board_fdt_blob_setup(void)
- {
- if (IS_ENABLED(CONFIG_OF_SEPARATE)) {
- if (gd->arch.firmware_fdt_addr)
- return (ulong *)gd->arch.firmware_fdt_addr;
- else
- return (ulong *)&_end;
- }
- }
- int board_init(void)
- {
- /* enable all cache ways */
- enable_caches();
- return 0;
- }
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