common/fpga.c

   1 /*
   2  * (C) Copyright 2002
   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  *  Generic FPGA support
  27  */
  28 #include <common.h>             /* core U-Boot definitions */
  29 #include <xilinx.h>             /* xilinx specific definitions */
  30 #include <altera.h>             /* altera specific definitions */
  31
  32 #if defined(CONFIG_FPGA)
  33
  34 #if 0
  35 #define FPGA_DEBUG              /* define FPGA_DEBUG to get debug messages */
  36 #endif
  37
  38 /* Local definitions */
  39 #ifndef CONFIG_MAX_FPGA_DEVICES
  40 #define CONFIG_MAX_FPGA_DEVICES         5
  41 #endif
  42
  43 /* Enable/Disable debug console messages */
  44 #ifdef FPGA_DEBUG
  45 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  46 #else
  47 #define PRINTF(fmt,args...)
  48 #endif
  49
  50 /* Local static data */
  51 static ulong relocation_offset = 0;
  52 static int next_desc = FPGA_INVALID_DEVICE;
  53 static fpga_desc desc_table[CONFIG_MAX_FPGA_DEVICES];
  54
  55 /* Local static functions */
  56 static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_get_desc( int devnum );
  57 static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_validate( int devnum, void *buf,
  58                                          size_t bsize, char *fn );
  59 static int fpga_dev_info( int devnum );
  60
  61
  62 /* ------------------------------------------------------------------------- */
  63
  64 /* fpga_no_sup
  65  * 'no support' message function
  66  */
  67 static void fpga_no_sup( char *fn, char *msg )
  68 {
  69         if ( fn && msg ) {
  70                 printf( "%s: No support for %s.  CONFIG_FPGA defined as 0x%x.\n",
  71                                 fn, msg, CONFIG_FPGA );
  72         } else if ( msg ) {
  73                 printf( "No support for %s. CONFIG_FPGA defined as 0x%x.\n",
  74                                 msg, CONFIG_FPGA );
  75         } else {
  76                 printf( "No FPGA suport!  CONFIG_FPGA defined as 0x%x.\n",
  77                                 CONFIG_FPGA );
  78         }
  79 }
  80
  81
  82 /* fpga_get_desc
  83  *      map a device number to a descriptor
  84  */
  85 static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_get_desc( int devnum )
  86 {
  87         fpga_desc *desc = (fpga_desc * )NULL;
  88
  89         if (( devnum >= 0 ) && (devnum < next_desc )) {
  90                 desc = &desc_table[devnum];
  91                 PRINTF( "%s: found fpga descriptor #%d @ 0x%p\n",
  92                                 __FUNCTION__, devnum, desc );
  93         }
  94
  95         return desc;
  96 }
  97
  98
  99 /* fpga_validate
 100  *      generic parameter checking code
 101  */
 102 static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_validate( int devnum, void *buf,
 103                                          size_t bsize, char *fn )
 104 {
 105         fpga_desc * desc = fpga_get_desc( devnum );
 106
 107         if ( !desc ) {
 108                 printf( "%s: Invalid device number %d\n", fn, devnum );
 109         }
 110
 111         if ( !buf ) {
 112                 printf( "%s: Null buffer.\n", fn );
 113                 return (fpga_desc * const)NULL;
 114         }
 115         if ( !bsize ) {
 116                 printf( "%s: Null buffer size.\n", fn );
 117                 return (fpga_desc * const)NULL;
 118         }
 119
 120         return desc;
 121 }
 122
 123
 124 /* fpga_dev_info
 125  *      generic multiplexing code
 126  */
 127 static int fpga_dev_info( int devnum )
 128 {
 129         int ret_val = FPGA_FAIL;           /* assume failure */
 130         const fpga_desc * const desc = fpga_get_desc( devnum );
 131
 132         if ( desc ) {
 133                 PRINTF( "%s: Device Descriptor @ 0x%p\n",
 134                                 __FUNCTION__, desc->devdesc );
 135
 136                 switch ( desc->devtype ) {
 137                 case fpga_xilinx:
 138 #if CONFIG_FPGA & CFG_FPGA_XILINX
 139                         printf( "Xilinx Device\nDescriptor @ 0x%p\n", desc );
 140                         ret_val = xilinx_info( desc->devdesc );
 141 #else
 142                         fpga_no_sup( __FUNCTION__, "Xilinx devices" );
 143 #endif
 144                         break;
 145                 case fpga_altera:
 146 #if CONFIG_FPGA & CFG_FPGA_ALTERA
 147                         printf( "Altera Device\nDescriptor @ 0x%p\n", desc );
 148                         ret_val = altera_info( desc->devdesc );
 149 #else
 150                         fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
 151 #endif
 152                         break;
 153                 default:
 154                         printf( "%s: Invalid or unsupported device type %d\n",
 155                                         __FUNCTION__, desc->devtype );
 156                 }
 157         } else {
 158                 printf( "%s: Invalid device number %d\n",
 159                         __FUNCTION__, devnum );
 160         }
 161
 162         return ret_val;
 163 }
 164
 165
 166 /* fpga_reloc
 167  *      generic multiplexing code
 168  */
 169 int fpga_reloc( fpga_type devtype, void *desc, ulong reloc_off )
 170 {
 171         int ret_val = FPGA_FAIL;
 172
 173         PRINTF( "%s: Relocating Device of type %d @ 0x%p with offset %lx\n",
 174                                 __FUNCTION__, devtype, desc, reloc_off );
 175
 176         switch ( devtype ) {
 177         case fpga_xilinx:
 178 #if CONFIG_FPGA & CFG_FPGA_XILINX
 179                 ret_val = xilinx_reloc( desc, reloc_off );
 180 #else
 181                 fpga_no_sup( __FUNCTION__, "Xilinx devices" );
 182 #endif
 183                 break;
 184         case fpga_altera:
 185 #if CONFIG_FPGA & CFG_FPGA_ALTERA
 186                 ret_val = altera_reloc( desc, reloc_off );
 187 #else
 188                 fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
 189 #endif
 190                 break;
 191         default:
 192                 printf( "%s: Invalid or unsupported device type %d\n",
 193                         __FUNCTION__, devtype );
 194         }
 195
 196         return ret_val;
 197 }
 198
 199 /* ------------------------------------------------------------------------- */
 200 /* fgpa_init is usually called from misc_init_r() and MUST be called
 201  * before any of the other fpga functions are used.
 202  */
 203 void fpga_init( ulong reloc_off )
 204 {
 205         relocation_offset = reloc_off;
 206         next_desc = 0;
 207         memset( desc_table, 0, sizeof(desc_table));
 208
 209         PRINTF( "%s: CONFIG_FPGA = 0x%x\n", __FUNCTION__, CONFIG_FPGA );
 210 #if 0
 211         PRINTF( "%s: CFG_FPGA_XILINX = 0x%x\n", __FUNCTION__, CFG_FPGA_XILINX );
 212         PRINTF( "%s: CFG_FPGA_ALTERA = 0x%x\n", __FUNCTION__, CFG_FPGA_ALTERA );
 213 #endif
 214 }
 215
 216 /* fpga_count
 217  * Basic interface function to get the current number of devices available.
 218  */
 219 int fpga_count( void )
 220 {
 221         return next_desc;
 222 }
 223
 224 /* fpga_add
 225  *      Attempts to relocate the device/board specific interface code
 226  *      to the proper RAM locations and adds the device descriptor to
 227  *      the device table.
 228  */
 229 int fpga_add( fpga_type devtype, void *desc )
 230 {
 231         int devnum = FPGA_INVALID_DEVICE;
 232
 233         if ( next_desc  < 0 ) {
 234                 printf( "%s: FPGA support not initialized!\n", __FUNCTION__ );
 235         } else if (( devtype > fpga_min_type ) && ( devtype < fpga_undefined )) {
 236                 if ( desc ) {
 237                         if ( next_desc < CONFIG_MAX_FPGA_DEVICES ) {
 238                                 if ( fpga_reloc( devtype, desc, relocation_offset )
 239                                   == FPGA_SUCCESS ) {
 240                                         devnum = next_desc;
 241                                         desc_table[next_desc].devtype = devtype;
 242                                         desc_table[next_desc++].devdesc = desc;
 243                                 } else {
 244                                         printf( "%s: Unable to relocate device interface table!\n",
 245                                                 __FUNCTION__ );
 246                                 }
 247                         } else {
 248                                 printf( "%s: Exceeded Max FPGA device count\n", __FUNCTION__ );
 249                         }
 250                 } else {
 251                         printf( "%s: NULL device descriptor\n", __FUNCTION__ );
 252                 }
 253         } else {
 254                 printf( "%s: Unsupported FPGA type %d\n", __FUNCTION__, devtype );
 255         }
 256
 257         return devnum;
 258 }
 259
 260 /*
 261  *      Generic multiplexing code
 262  */
 263 int fpga_load( int devnum, void *buf, size_t bsize )
 264 {
 265         int ret_val = FPGA_FAIL;           /* assume failure */
 266         fpga_desc * desc = fpga_validate( devnum, buf, bsize, (char *)__FUNCTION__ );
 267
 268         if ( desc ) {
 269                 switch ( desc->devtype ) {
 270                 case fpga_xilinx:
 271 #if CONFIG_FPGA & CFG_FPGA_XILINX
 272                         ret_val = xilinx_load( desc->devdesc, buf, bsize );
 273 #else
 274                         fpga_no_sup( __FUNCTION__, "Xilinx devices" );
 275 #endif
 276                         break;
 277                 case fpga_altera:
 278 #if CONFIG_FPGA & CFG_FPGA_ALTERA
 279                         ret_val = altera_load( desc->devdesc, buf, bsize );
 280 #else
 281                         fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
 282 #endif
 283                         break;
 284                 default:
 285                         printf( "%s: Invalid or unsupported device type %d\n",
 286                                 __FUNCTION__, desc->devtype );
 287                 }
 288         }
 289
 290         return ret_val;
 291 }
 292
 293 /* fpga_dump
 294  *      generic multiplexing code
 295  */
 296 int fpga_dump( int devnum, void *buf, size_t bsize )
 297 {
 298         int ret_val = FPGA_FAIL;           /* assume failure */
 299         fpga_desc * desc = fpga_validate( devnum, buf, bsize, (char *)__FUNCTION__ );
 300
 301         if ( desc ) {
 302                 switch ( desc->devtype ) {
 303                 case fpga_xilinx:
 304 #if CONFIG_FPGA & CFG_FPGA_XILINX
 305                         ret_val = xilinx_dump( desc->devdesc, buf, bsize );
 306 #else
 307                         fpga_no_sup( __FUNCTION__, "Xilinx devices" );
 308 #endif
 309                         break;
 310                 case fpga_altera:
 311 #if CONFIG_FPGA & CFG_FPGA_ALTERA
 312                         ret_val = altera_dump( desc->devdesc, buf, bsize );
 313 #else
 314                         fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
 315 #endif
 316                         break;
 317                 default:
 318                         printf( "%s: Invalid or unsupported device type %d\n",
 319                                 __FUNCTION__, desc->devtype );
 320                 }
 321         }
 322
 323         return ret_val;
 324 }
 325
 326
 327 /* fpga_info
 328  *      front end to fpga_dev_info.  If devnum is invalid, report on all
 329  *      available devices.
 330  */
 331 int fpga_info( int devnum )
 332 {
 333         if ( devnum == FPGA_INVALID_DEVICE ) {
 334                 if ( next_desc > 0 ) {
 335                         int dev;
 336
 337                         for ( dev = 0; dev < next_desc; dev++ ) {
 338                                 fpga_dev_info( dev );
 339                         }
 340                         return FPGA_SUCCESS;
 341                 } else {
 342                         printf( "%s: No FPGA devices available.\n", __FUNCTION__ );
 343                         return FPGA_FAIL;
 344                 }
 345         }
 346         else return fpga_dev_info( devnum );
 347 }
 348
 349 /* ------------------------------------------------------------------------- */
 350
 351 #endif  /* CONFIG_FPGA */