cmd/dataflash_mmc_mux.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9
  10 static int mmc_nspi (const char *);
  11
  12 int do_dataflash_mmc_mux (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  13 {
  14         switch (argc) {
  15         case 2:                 /* on / off     */
  16                 switch (mmc_nspi (argv[1])) {
  17                 case 0: AT91F_SelectSPI ();
  18                         break;
  19                 case 1: AT91F_SelectMMC ();
  20                         break;
  21                 }
  22         case 1:                 /* get status */
  23                 printf ("Mux is configured to be %s\n",
  24                         AT91F_GetMuxStatus () ? "MMC" : "SPI");
  25                 return 0;
  26         default:
  27                 return CMD_RET_USAGE;
  28         }
  29         return 0;
  30 }
  31
  32 static int mmc_nspi (const char *s)
  33 {
  34         if (strcmp (s, "mmc") == 0) {
  35                 return 1;
  36         } else if (strcmp (s, "spi") == 0) {
  37                 return 0;
  38         }
  39         return -1;
  40 }
  41
  42 U_BOOT_CMD(
  43         dataflash_mmc_mux, 2, 1, do_dataflash_mmc_mux,
  44         "enable or disable MMC or SPI\n",
  45         "[mmc, spi]\n"
  46         "    - enable or disable MMC or SPI"
  47 );