56 lines
1.2 KiB
C
56 lines
1.2 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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#include <asm/unaligned.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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if (mmc_init(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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/* use locally adminstrated pool */
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mac[0] = 0x02;
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mac[1] = 0x00;
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/*
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* Put the 32-bit serial number in the last 32-bit of the MAC address.
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* Use big endian order so it is consistent with the serial number
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* written as a hexadecimal string, e.g. 0x1234abcd -> 02:00:12:34:ab:cd
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*/
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put_unaligned_be32(msm_board_serial(), &mac[2]);
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}
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