GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Miscellaneous Snapdragon functionality
+ *
+ * (C) Copyright 2018 Ramon Fried <ramon.fried@gmail.com>
+ *
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <asm/arch/misc.h>
+
+/* UNSTUFF_BITS macro taken from Linux Kernel: drivers/mmc/core/sd.c */
+#define UNSTUFF_BITS(resp, start, size) \
+	({ \
+		const int __size = size; \
+		const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1;	\
+		const int __off = 3 - ((start) / 32); \
+		const int __shft = (start) & 31; \
+		u32 __res; \
+					\
+		__res = resp[__off] >> __shft; \
+		if (__size + __shft > 32) \
+			__res |= resp[__off - 1] << ((32 - __shft) % 32); \
+		__res & __mask;	\
+	})
+
+u32 msm_board_serial(void)
+{
+	struct mmc *mmc_dev;
+
+	mmc_dev = find_mmc_device(0);
+	if (!mmc_dev)
+		return 0;
+
+	return UNSTUFF_BITS(mmc_dev->cid, 16, 32);
+}
+
+void msm_generate_mac_addr(u8 *mac)
+{
+	int i;
+	char sn[9];
+
+	snprintf(sn, 8, "%08x", msm_board_serial());
+
+	/* fill in the mac with serialno, use locally adminstrated pool */
+	mac[0] = 0x02;
+	mac[1] = 00;
+	for (i = 3; i >= 0; i--) {
+		mac[i + 2] = simple_strtoul(&sn[2 * i], NULL, 16);
+		sn[2 * i] = 0;
+	}
+}