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Diffstat (limited to 'board/sifive/unleashed/unleashed.c')
-rw-r--r--board/sifive/unleashed/unleashed.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/board/sifive/unleashed/unleashed.c b/board/sifive/unleashed/unleashed.c
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index 0000000000..a4e78220cb
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+++ b/board/sifive/unleashed/unleashed.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ * Anup Patel <anup.patel@wdc.com>
+ */
+
+#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/arch/cache.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
+
+int board_init(void)
+{
+ int ret;
+
+ /* enable all cache ways */
+ ret = cache_enable_ways();
+ if (ret) {
+ debug("%s: could not enable cache ways\n", __func__);
+ return ret;
+ }
+
+ return 0;
+}