cmd/dataflash_mmc_mux.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <command.h>
  10
  11 static int mmc_nspi (const char *);
  12
  13 int do_dataflash_mmc_mux (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  14 {
  15         switch (argc) {
  16         case 2:                 /* on / off     */
  17                 switch (mmc_nspi (argv[1])) {
  18                 case 0: AT91F_SelectSPI ();
  19                         break;
  20                 case 1: AT91F_SelectMMC ();
  21                         break;
  22                 }
  23         case 1:                 /* get status */
  24                 printf ("Mux is configured to be %s\n",
  25                         AT91F_GetMuxStatus () ? "MMC" : "SPI");
  26                 return 0;
  27         default:
  28                 return CMD_RET_USAGE;
  29         }
  30         return 0;
  31 }
  32
  33 static int mmc_nspi (const char *s)
  34 {
  35         if (strcmp (s, "mmc") == 0) {
  36                 return 1;
  37         } else if (strcmp (s, "spi") == 0) {
  38                 return 0;
  39         }
  40         return -1;
  41 }
  42
  43 U_BOOT_CMD(
  44         dataflash_mmc_mux, 2, 1, do_dataflash_mmc_mux,
  45         "enable or disable MMC or SPI\n",
  46         "[mmc, spi]\n"
  47         "    - enable or disable MMC or SPI"
  48 );