common/cmd_dcr.c

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
   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 /*
  25  * AMCC 4XX DCR Functions
  26  */
  27
  28 #include <common.h>
  29 #include <config.h>
  30 #include <command.h>
  31
  32 #if defined(CONFIG_4xx) && (CONFIG_COMMANDS & CFG_CMD_SETGETDCR)
  33
  34 /* =======================================================================
  35  * Interpreter command to retrieve an AMCC PPC 4xx Device Control Register
  36  * =======================================================================
  37  */
  38 int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
  39 {
  40         unsigned short dcrn;    /* Device Control Register Num */
  41         unsigned long value;    /* DCR's value */
  42
  43         unsigned long get_dcr (unsigned short);
  44
  45         /* Validate arguments */
  46         if (argc < 2) {
  47                 printf ("Usage:\n%s\n", cmdtp->usage);
  48                 return 1;
  49         }
  50
  51         /* Get a DCR */
  52         dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
  53         value = get_dcr (dcrn);
  54
  55         printf ("%04x: %08lx\n", dcrn, value);
  56
  57         return 0;
  58 }
  59
  60
  61 /* ======================================================================
  62  * Interpreter command to set an AMCC PPC 4xx Device Control Register
  63  * ======================================================================
  64 */
  65 int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  66 {
  67         unsigned long get_dcr (unsigned short);
  68         unsigned long set_dcr (unsigned short, unsigned long);
  69         unsigned short dcrn;    /* Device Control Register Num */
  70         unsigned long value;
  71
  72         /* DCR's value */
  73         int nbytes;
  74         extern char console_buffer[];
  75
  76         /* Validate arguments */
  77         if (argc < 2) {
  78                 printf ("Usage:\n%s\n", cmdtp->usage);
  79                 return 1;
  80         }
  81
  82         /* Set a DCR */
  83         dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
  84         do {
  85                 value = get_dcr (dcrn);
  86                 printf ("%04x: %08lx", dcrn, value);
  87                 nbytes = readline (" ? ");
  88                 if (nbytes == 0) {
  89                         /*
  90                          * <CR> pressed as only input, don't modify current
  91                          * location and exit command.
  92                          */
  93                         nbytes = 1;
  94                         return 0;
  95                 } else {
  96                         unsigned long i;
  97                         char *endp;
  98
  99                         i = simple_strtoul (console_buffer, &endp, 16);
 100                         nbytes = endp - console_buffer;
 101                         if (nbytes)
 102                                 set_dcr (dcrn, i);
 103                 }
 104         } while (nbytes);
 105
 106         return 0;
 107 }
 108
 109 /***************************************************/
 110
 111 U_BOOT_CMD(
 112         getdcr, 2,      1,      do_getdcr,
 113         "getdcr  - Get an AMCC PPC 4xx DCR's value\n",
 114         "dcrn - return a DCR's value.\n"
 115 );
 116 U_BOOT_CMD(
 117         setdcr, 2,      1,      do_setdcr,
 118         "setdcr  - Set an AMCC PPC 4xx DCR's value\n",
 119         "dcrn - set a DCR's value.\n"
 120 );
 121
 122 #endif /* CONFIG_4xx & CFG_CMD_SETGETDCR */