Add wait for KFuse init to prevent wrong TSEC key

source/soc/kfuse.c

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2018 naehrwert
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../soc/kfuse.h"
+#include "../soc/clock.h"
+#include "../soc/t210.h"
+
+#pragma GCC push_options
+#pragma GCC optimize ("Os")
+
+int kfuse_read(u32 *buf)
+{
+	int res = 0;
+
+	clock_enable_kfuse();
+
+	while (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_DONE))
+		;
+
+	if (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_CRCPASS))
+		goto out;
+
+	KFUSE(KFUSE_KEYADDR) = KFUSE_KEYADDR_AUTOINC;
+	for (int i = 0; i < KFUSE_NUM_WORDS; i++)
+		buf[i] = KFUSE(KFUSE_KEYS);
+
+	res = 1;
+
+out:;
+	clock_disable_kfuse();
+	return res;
+}
+
+int kfuse_wait_ready()
+{
+    // Wait for KFUSE to finish init and verification of data.
+    while (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_DONE))
+    {
+        usleep(500);
+    }
+
+    if (!(KFUSE(KFUSE_STATE) & KFUSE_STATE_CRCPASS))
+        return 0;
+
+    return 1;
+}
+
+#pragma GCC pop_options

source/soc/kfuse.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2018 naehrwert
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _KFUSE_H_
+#define _KFUSE_H_
+
+#include "../utils/types.h"
+
+#define KFUSE_STATE_SOFTRESET      (1 << 31)
+#define KFUSE_STATE_STOP           (1 << 25)
+#define KFUSE_STATE_RESTART        (1 << 24)
+#define KFUSE_STATE_CRCPASS        (1 << 17)
+#define KFUSE_STATE_DONE           (1 << 16)
+#define KFUSE_STATE_ERRBLOCK_MASK  0x3F00
+#define KFUSE_STATE_ERRBLOCK_SHIFT 8
+#define KFUSE_STATE_CURBLOCK_MASK  0x3F
+
+#define KFUSE_KEYADDR_AUTOINC (1<<16)
+
+#define KFUSE_STATE 0x80
+#define KFUSE_KEYADDR 0x88
+#define KFUSE_KEYS 0x8C
+
+#define KFUSE_NUM_WORDS 144
+
+int kfuse_read(u32 *buf);
+int kfuse_wait_ready();
+
+#endif