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 unsigned long get_dcr (unsigned short);
  33 unsigned long set_dcr (unsigned short, unsigned long);
  34
  35 /* =======================================================================
  36  * Interpreter command to retrieve an AMCC PPC 4xx Device Control Register
  37  * =======================================================================
  38  */
  39 int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[] )
  40 {
  41         unsigned short dcrn;    /* Device Control Register Num */
  42         unsigned long value;    /* DCR's value */
  43
  44         unsigned long get_dcr (unsigned short);
  45
  46         /* Validate arguments */
  47         if (argc < 2)
  48                 return CMD_RET_USAGE;
  49
  50         /* Get a DCR */
  51         dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
  52         value = get_dcr (dcrn);
  53
  54         printf ("%04x: %08lx\n", dcrn, value);
  55
  56         return 0;
  57 }
  58
  59
  60 /* ======================================================================
  61  * Interpreter command to set an AMCC PPC 4xx Device Control Register
  62  * ======================================================================
  63 */
  64 int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
  65 {
  66         unsigned short dcrn;    /* Device Control Register Num */
  67         unsigned long value;
  68
  69         /* DCR's value */
  70         int nbytes;
  71
  72         /* Validate arguments */
  73         if (argc < 2)
  74                 return CMD_RET_USAGE;
  75
  76         /* Set a DCR */
  77         dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
  78         do {
  79                 value = get_dcr (dcrn);
  80                 printf ("%04x: %08lx", dcrn, value);
  81                 nbytes = readline (" ? ");
  82                 if (nbytes == 0) {
  83                         /*
  84                          * <CR> pressed as only input, don't modify current
  85                          * location and exit command.
  86                          */
  87                         nbytes = 1;
  88                         return 0;
  89                 } else {
  90                         unsigned long i;
  91                         char *endp;
  92
  93                         i = simple_strtoul (console_buffer, &endp, 16);
  94                         nbytes = endp - console_buffer;
  95                         if (nbytes)
  96                                 set_dcr (dcrn, i);
  97                 }
  98         } while (nbytes);
  99
 100         return 0;
 101 }
 102
 103 /* =======================================================================
 104  * Interpreter command to retrieve an register value through AMCC PPC 4xx
 105  * Device Control Register inderect addressing.
 106  * =======================================================================
 107  */
 108 int do_getidcr (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 109 {
 110         unsigned short adr_dcrn;        /* Device Control Register Num for Address */
 111         unsigned short dat_dcrn;        /* Device Control Register Num for Data */
 112         unsigned short offset;          /* Register's offset */
 113         unsigned long value;            /* Register's value */
 114         char *ptr = NULL;
 115         char buf[80];
 116
 117         /* Validate arguments */
 118         if (argc < 3)
 119                 return CMD_RET_USAGE;
 120
 121         /* Find out whether ther is '.' (dot) symbol in the first parameter. */
 122         strncpy (buf, argv[1], sizeof(buf)-1);
 123         buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
 124         ptr = strchr (buf, '.');
 125
 126         if (ptr != NULL) {
 127                 /* First parameter has format adr_dcrn.dat_dcrn */
 128                 *ptr++ = 0; /* erase '.', create zero-end string */
 129                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 130                 dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
 131         } else {
 132                 /*
 133                  * First parameter has format adr_dcrn; dat_dcrn will be
 134                  * calculated as adr_dcrn+1.
 135                  */
 136                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 137                 dat_dcrn = adr_dcrn+1;
 138         }
 139
 140         /* Register's offset */
 141         offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
 142
 143         /* Disable interrupts */
 144         disable_interrupts ();
 145         /* Set offset */
 146         set_dcr (adr_dcrn, offset);
 147         /* get data */
 148         value = get_dcr (dat_dcrn);
 149         /* Enable interrupts */
 150         enable_interrupts ();
 151
 152         printf ("%04x.%04x-%04x Read  %08lx\n", adr_dcrn, dat_dcrn, offset, value);
 153
 154         return 0;
 155 }
 156
 157 /* =======================================================================
 158  * Interpreter command to update an register value through AMCC PPC 4xx
 159  * Device Control Register inderect addressing.
 160  * =======================================================================
 161  */
 162 int do_setidcr (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 163 {
 164         unsigned short adr_dcrn;        /* Device Control Register Num for Address */
 165         unsigned short dat_dcrn;        /* Device Control Register Num for Data */
 166         unsigned short offset;          /* Register's offset */
 167         unsigned long value;            /* Register's value */
 168         char *ptr = NULL;
 169         char buf[80];
 170
 171         /* Validate arguments */
 172         if (argc < 4)
 173                 return CMD_RET_USAGE;
 174
 175         /* Find out whether ther is '.' (dot) symbol in the first parameter. */
 176         strncpy (buf, argv[1], sizeof(buf)-1);
 177         buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
 178         ptr = strchr (buf, '.');
 179
 180         if (ptr != NULL) {
 181                 /* First parameter has format adr_dcrn.dat_dcrn */
 182                 *ptr++ = 0;     /* erase '.', create zero-end string */
 183                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 184                 dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
 185         } else {
 186                 /*
 187                  * First parameter has format adr_dcrn; dat_dcrn will be
 188                  * calculated as adr_dcrn+1.
 189                  */
 190                 adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
 191                 dat_dcrn = adr_dcrn+1;
 192         }
 193
 194         /* Register's offset */
 195         offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
 196         /* New value */
 197         value  = (unsigned  long) simple_strtoul (argv[3], NULL, 16);
 198
 199         /* Disable interrupts */
 200         disable_interrupts ();
 201         /* Set offset */
 202         set_dcr (adr_dcrn, offset);
 203         /* set data */
 204         set_dcr (dat_dcrn, value);
 205         /* Enable interrupts */
 206         enable_interrupts ();
 207
 208         printf ("%04x.%04x-%04x Write %08lx\n", adr_dcrn, dat_dcrn, offset, value);
 209
 210         return 0;
 211 }
 212
 213 /***************************************************/
 214
 215 U_BOOT_CMD(
 216         getdcr, 2,      1,      do_getdcr,
 217         "Get an AMCC PPC 4xx DCR's value",
 218         "dcrn - return a DCR's value."
 219 );
 220 U_BOOT_CMD(
 221         setdcr, 2,      1,      do_setdcr,
 222         "Set an AMCC PPC 4xx DCR's value",
 223         "dcrn - set a DCR's value."
 224 );
 225
 226 U_BOOT_CMD(
 227         getidcr,        3,      1,      do_getidcr,
 228         "Get a register value via indirect DCR addressing",
 229         "adr_dcrn[.dat_dcrn] offset - write offset to adr_dcrn, read value from dat_dcrn."
 230 );
 231
 232 U_BOOT_CMD(
 233         setidcr,        4,      1,      do_setidcr,
 234         "Set a register value via indirect DCR addressing",
 235         "adr_dcrn[.dat_dcrn] offset value - write offset to adr_dcrn, write value to dat_dcrn."
 236 );