common/cmd_dataflash_mmc_mux.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26
  27 static int mmc_nspi (const char *);
  28
  29 int do_dataflash_mmc_mux (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  30 {
  31         switch (argc) {
  32         case 2:                 /* on / off     */
  33                 switch (mmc_nspi (argv[1])) {
  34                 case 0: AT91F_SelectSPI ();
  35                         break;
  36                 case 1: AT91F_SelectMMC ();
  37                         break;
  38                 }
  39         case 1:                 /* get status */
  40                 printf ("Mux is configured to be %s\n",
  41                         AT91F_GetMuxStatus () ? "MMC" : "SPI");
  42                 return 0;
  43         default:
  44                 return cmd_usage(cmdtp);
  45         }
  46         return 0;
  47 }
  48
  49 static int mmc_nspi (const char *s)
  50 {
  51         if (strcmp (s, "mmc") == 0) {
  52                 return 1;
  53         } else if (strcmp (s, "spi") == 0) {
  54                 return 0;
  55         }
  56         return -1;
  57 }
  58
  59 U_BOOT_CMD(
  60         dataflash_mmc_mux, 2, 1, do_dataflash_mmc_mux,
  61         "enable or disable MMC or SPI\n",
  62         "[mmc, spi]\n"
  63         "    - enable or disable MMC or SPI"
  64 );