mirror of
https://github.com/brain-hackers/u-boot-brain
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65e25bea59
In the spirit of using the same base name for all of these related macros, rename this to have the operation at the end. This is not widely used so the impact is fairly small. Signed-off-by: Simon Glass <sjg@chromium.org>
129 lines
2.6 KiB
C
129 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#include <dm.h>
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#include <env.h>
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#include <init.h>
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#include <log.h>
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#include <linux/bitops.h>
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#include <linux/bug.h>
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#include <linux/delay.h>
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#include <misc.h>
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#include <spl.h>
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#include <asm/arch/cache.h>
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/*
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* This define is a value used for error/unknown serial.
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* If we really care about distinguishing errors and 0 is
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* valid, we'll need a different one.
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*/
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#define ERROR_READING_SERIAL_NUMBER 0
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#ifdef CONFIG_MISC_INIT_R
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#if CONFIG_IS_ENABLED(SIFIVE_OTP)
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static u32 otp_read_serialnum(struct udevice *dev)
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{
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int ret;
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u32 serial[2] = {0};
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for (int i = 0xfe * 4; i > 0; i -= 8) {
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ret = misc_read(dev, i, serial, sizeof(serial));
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if (ret != sizeof(serial)) {
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printf("%s: error reading serial from OTP\n", __func__);
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break;
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}
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if (serial[0] == ~serial[1])
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return serial[0];
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}
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return ERROR_READING_SERIAL_NUMBER;
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}
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#endif
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static u32 fu540_read_serialnum(void)
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{
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u32 serial = ERROR_READING_SERIAL_NUMBER;
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#if CONFIG_IS_ENABLED(SIFIVE_OTP)
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struct udevice *dev;
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int ret;
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/* init OTP */
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_DRIVER_GET(sifive_otp), &dev);
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if (ret) {
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debug("%s: could not find otp device\n", __func__);
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return serial;
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}
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/* read serial from OTP and set env var */
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serial = otp_read_serialnum(dev);
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#endif
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return serial;
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}
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static void fu540_setup_macaddr(u32 serialnum)
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{
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/* Default MAC address */
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unsigned char mac[6] = { 0x70, 0xb3, 0xd5, 0x92, 0xf0, 0x00 };
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/*
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* We derive our board MAC address by ORing last three bytes
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* of board serial number to above default MAC address.
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*
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* This logic of deriving board MAC address is taken from
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* SiFive FSBL and is kept unchanged.
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*/
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mac[5] |= (serialnum >> 0) & 0xff;
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mac[4] |= (serialnum >> 8) & 0xff;
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mac[3] |= (serialnum >> 16) & 0xff;
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/* Update environment variable */
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eth_env_set_enetaddr("ethaddr", mac);
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}
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int misc_init_r(void)
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{
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u32 serial_num;
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char buf[9] = {0};
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/* Set ethaddr environment variable from board serial number */
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if (!env_get("serial#")) {
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serial_num = fu540_read_serialnum();
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if (!serial_num) {
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WARN(true, "Board serial number should not be 0 !!\n");
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return 0;
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}
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snprintf(buf, sizeof(buf), "%08x", serial_num);
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env_set("serial#", buf);
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fu540_setup_macaddr(serial_num);
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}
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return 0;
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}
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#endif
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int board_init(void)
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{
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int ret;
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/* enable all cache ways */
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ret = cache_enable_ways();
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if (ret) {
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debug("%s: could not enable cache ways\n", __func__);
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return ret;
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}
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return 0;
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}
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