common/cmd_fpga.c

   1 /*
   2  * (C) Copyright 2000, 2001
   3  * Rich Ireland, Enterasys Networks, rireland@enterasys.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 /*
  26  *  FPGA support
  27  */
  28 #include <common.h>
  29 #include <command.h>
  30 #include <cmd_fpga.h>
  31 #include <fpga.h>
  32 #if (CONFIG_COMMANDS & CFG_CMD_NET)
  33 #include <net.h>
  34 #endif
  35
  36 #if 0
  37 #define FPGA_DEBUG
  38 #endif
  39
  40 #ifdef  FPGA_DEBUG
  41 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  42 #else
  43 #define PRINTF(fmt,args...)
  44 #endif
  45
  46 #if defined (CONFIG_FPGA) && ( CONFIG_COMMANDS & CFG_CMD_FPGA )
  47
  48 /* Local functions */
  49 static void fpga_usage ( cmd_tbl_t *cmdtp );
  50 static int fpga_get_op( char *opstr );
  51
  52 /* Local defines */
  53 #define FPGA_NONE   -1
  54 #define FPGA_INFO   0
  55 #define FPGA_LOAD   1
  56 #define FPGA_DUMP   3
  57
  58 /* ------------------------------------------------------------------------- */
  59 /* command form:
  60  *   fpga <op> <device number> <data addr> <datasize>
  61  * where op is 'load', 'dump', or 'info'
  62  * If there is no device number field, the fpga environment variable is used.
  63  * If there is no data addr field, the fpgadata environment variable is used.
  64  * The info command requires no data address field.
  65  */
  66 int
  67 do_fpga (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  68 {
  69     int op, dev = FPGA_INVALID_DEVICE;
  70     size_t data_size = 0;
  71     void *fpga_data = NULL;
  72     char *devstr = getenv("fpga");
  73     char *datastr = getenv("fpgadata");
  74
  75         if ( devstr ) dev = (int)simple_strtoul( devstr, NULL, 16 );
  76         if ( datastr ) fpga_data = (void *)simple_strtoul( datastr, NULL, 16 );
  77
  78     switch ( argc )
  79     {
  80             case 5: /* fpga <op> <dev> <data> <datasize> */
  81                     data_size = simple_strtoul( argv[4], NULL, 16 );
  82             case 4: /* fpga <op> <dev> <data> */
  83                     fpga_data = (void *)simple_strtoul( argv[3], NULL, 16 );
  84                         PRINTF(__FUNCTION__": fpga_data = 0x%x\n", (uint)fpga_data );
  85             case 3: /* fpga <op> <dev | data addr> */
  86                     dev = (int)simple_strtoul( argv[2], NULL, 16 );
  87                         PRINTF(__FUNCTION__": device = %d\n", dev );
  88                         /* FIXME - this is a really weak test */
  89                     if (( argc == 3 ) && ( dev > fpga_count() )) { /* must be buffer ptr */
  90                                 PRINTF(__FUNCTION__": Assuming buffer pointer in arg 3\n");
  91                             fpga_data = (void *)dev;
  92                                 PRINTF(__FUNCTION__": fpga_data = 0x%x\n", (uint)fpga_data );
  93                             dev = FPGA_INVALID_DEVICE;  /* reset device num */
  94                     }
  95             case 2: /* fpga <op> */
  96                     op = (int)fpga_get_op( argv[1] );
  97                     break;
  98             default:
  99                         PRINTF(__FUNCTION__": Too many or too few args (%d)\n", argc );
 100                     op = FPGA_NONE;    /* force usage display */
 101                     break;
 102     }
 103
 104     switch ( op ) {
 105             case FPGA_NONE:
 106                     fpga_usage( cmdtp );
 107                     break;
 108
 109             case FPGA_INFO:
 110                     fpga_info( dev );
 111                     break;
 112
 113             case FPGA_LOAD:
 114                         fpga_load( dev, fpga_data, data_size );
 115                     break;
 116
 117             case FPGA_DUMP:
 118                         fpga_dump( dev, fpga_data, data_size );
 119                     break;
 120
 121             default:
 122                     printf( "Unknown operation.\n" );
 123                     fpga_usage( cmdtp );
 124                     break;
 125     }
 126     return 0;
 127 }
 128
 129 static void fpga_usage ( cmd_tbl_t *cmdtp )
 130 {
 131         printf( "Usage:\n%s\n", cmdtp->usage );
 132 }
 133
 134 /*
 135  * Map op to supported operations.  We don't use a table since we
 136  * would just have to relocate it from flash anyway.
 137  */
 138 static int fpga_get_op( char *opstr )
 139 {
 140         int op = FPGA_NONE;
 141
 142         if (!strcmp ("info", opstr)) {
 143                 op = FPGA_INFO;
 144         }
 145         else if (!strcmp ("load", opstr)) {
 146                 op = FPGA_LOAD;
 147         }
 148         else if (!strcmp ("dump", opstr)) {
 149                 op = FPGA_DUMP;
 150         }
 151
 152         if ( op == FPGA_NONE ) {
 153                 printf ("Unknown fpga operation \"%s\"\n", opstr);
 154         }
 155         return op;
 156 }
 157
 158 #endif  /* CONFIG_FPGA && CONFIG_COMMANDS & CFG_CMD_FPGA */