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https://github.com/brain-hackers/u-boot-brain
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740370282e
When generating the MAC address based on the boards serial number the last digit was overwritten with the null termination. That way boards with serial numbers close to each other would use the same MAC address. Signed-off-by: Jan-Christoph Tebbe <Jan-Christoph.Tebbe@ithinx.io>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Miscellaneous Snapdragon functionality
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*
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* (C) Copyright 2018 Ramon Fried <ramon.fried@gmail.com>
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*
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*/
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#include <common.h>
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#include <mmc.h>
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#include <asm/arch/misc.h>
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/* UNSTUFF_BITS macro taken from Linux Kernel: drivers/mmc/core/sd.c */
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#define UNSTUFF_BITS(resp, start, size) \
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({ \
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const int __size = size; \
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const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
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const int __off = 3 - ((start) / 32); \
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const int __shft = (start) & 31; \
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u32 __res; \
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\
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__res = resp[__off] >> __shft; \
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if (__size + __shft > 32) \
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__res |= resp[__off - 1] << ((32 - __shft) % 32); \
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__res & __mask; \
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})
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u32 msm_board_serial(void)
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{
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struct mmc *mmc_dev;
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mmc_dev = find_mmc_device(0);
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if (!mmc_dev)
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return 0;
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return UNSTUFF_BITS(mmc_dev->cid, 16, 32);
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}
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void msm_generate_mac_addr(u8 *mac)
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{
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int i;
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char sn[9];
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snprintf(sn, 9, "%08x", msm_board_serial());
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/* fill in the mac with serialno, use locally adminstrated pool */
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mac[0] = 0x02;
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mac[1] = 00;
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for (i = 3; i >= 0; i--) {
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mac[i + 2] = simple_strtoul(&sn[2 * i], NULL, 16);
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sn[2 * i] = 0;
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}
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}
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