1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Miscellaneous Snapdragon functionality 4 * 5 * (C) Copyright 2018 Ramon Fried <ramon.fried@gmail.com> 6 * 7 */ 8 9 #include <common.h> 10 #include <mmc.h> 11 #include <asm/arch/misc.h> 12 13 /* UNSTUFF_BITS macro taken from Linux Kernel: drivers/mmc/core/sd.c */ 14 #define UNSTUFF_BITS(resp, start, size) \ 15 ({ \ 16 const int __size = size; \ 17 const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ 18 const int __off = 3 - ((start) / 32); \ 19 const int __shft = (start) & 31; \ 20 u32 __res; \ 21 \ 22 __res = resp[__off] >> __shft; \ 23 if (__size + __shft > 32) \ 24 __res |= resp[__off - 1] << ((32 - __shft) % 32); \ 25 __res & __mask; \ 26 }) 27 28 u32 msm_board_serial(void) 29 { 30 struct mmc *mmc_dev; 31 32 mmc_dev = find_mmc_device(0); 33 if (!mmc_dev) 34 return 0; 35 36 return UNSTUFF_BITS(mmc_dev->cid, 16, 32); 37 } 38