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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>
#include <asm/unaligned.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;
if (mmc_init(mmc_dev))
return 0;
return UNSTUFF_BITS(mmc_dev->cid, 16, 32);
}
void msm_generate_mac_addr(u8 *mac)
{
/* use locally adminstrated pool */
mac[0] = 0x02;
mac[1] = 0x00;
/*
* Put the 32-bit serial number in the last 32-bit of the MAC address.
* Use big endian order so it is consistent with the serial number
* written as a hexadecimal string, e.g. 0x1234abcd -> 02:00:12:34:ab:cd
*/
put_unaligned_be32(msm_board_serial(), &mac[2]);
}
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