mmc.c 929 B

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2016 Freescale Semiconductor, Inc.
  4. * Copyright 2018 NXP
  5. *
  6. */
  7. #include <common.h>
  8. #include <linux/errno.h>
  9. #include <asm/io.h>
  10. #include <env.h>
  11. #include <command.h>
  12. #include <stdbool.h>
  13. #include <mmc.h>
  14. static int check_mmc_autodetect(void)
  15. {
  16. char *autodetect_str = env_get("mmcautodetect");
  17. if ((autodetect_str) && (strcmp(autodetect_str, "yes") == 0))
  18. return 1;
  19. return 0;
  20. }
  21. /* This should be defined for each board */
  22. __weak int mmc_map_to_kernel_blk(int dev_no)
  23. {
  24. return dev_no;
  25. }
  26. void board_late_mmc_env_init(void)
  27. {
  28. char cmd[32];
  29. char mmcblk[32];
  30. u32 dev_no = mmc_get_env_dev();
  31. if (!check_mmc_autodetect())
  32. return;
  33. env_set_ulong("mmcdev", dev_no);
  34. /* Set mmcblk env */
  35. sprintf(mmcblk, "/dev/mmcblk%dp2 rootwait rw",
  36. mmc_map_to_kernel_blk(dev_no));
  37. env_set("mmcroot", mmcblk);
  38. sprintf(cmd, "mmc dev %d", dev_no);
  39. run_command(cmd, 0);
  40. }