cmd_fpga.c

/*
 * (C) Copyright 2000, 2001
 * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */

/*
 *  FPGA support
 */
#include <common.h>
#include <command.h>
#if (CONFIG_COMMANDS & CFG_CMD_NET)
#include <net.h>
#endif
#include <fpga.h>

#if 0
#define	FPGA_DEBUG
#endif

#ifdef	FPGA_DEBUG
#define	PRINTF(fmt,args...)	printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif

#if defined (CONFIG_FPGA) && ( CONFIG_COMMANDS & CFG_CMD_FPGA )

/* Local functions */
static void fpga_usage ( cmd_tbl_t *cmdtp );
static int fpga_get_op( char *opstr );

/* Local defines */
#define FPGA_NONE   -1
#define FPGA_INFO   0
#define FPGA_LOAD   1
#define FPGA_DUMP   3

/* ------------------------------------------------------------------------- */
/* command form:
 *   fpga <op> <device number> <data addr> <datasize>
 * where op is 'load', 'dump', or 'info'
 * If there is no device number field, the fpga environment variable is used.
 * If there is no data addr field, the fpgadata environment variable is used.
 * The info command requires no data address field.
 */
int
do_fpga (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
    int op, dev = FPGA_INVALID_DEVICE;
    size_t data_size = 0;
    void *fpga_data = NULL;
    char *devstr = getenv("fpga");
    char *datastr = getenv("fpgadata");
    int rc = FPGA_FAIL;

	if ( devstr ) dev = (int)simple_strtoul( devstr, NULL, 16 );
	if ( datastr ) fpga_data = (void *)simple_strtoul( datastr, NULL, 16 );

    switch ( argc )
    {
	    case 5: /* fpga <op> <dev> <data> <datasize> */
		    data_size = simple_strtoul( argv[4], NULL, 16 );
	    case 4: /* fpga <op> <dev> <data> */
		    fpga_data = (void *)simple_strtoul( argv[3], NULL, 16 );
			PRINTF(__FUNCTION__": fpga_data = 0x%x\n", (uint)fpga_data );
	    case 3: /* fpga <op> <dev | data addr> */
		    dev = (int)simple_strtoul( argv[2], NULL, 16 );
			PRINTF(__FUNCTION__": device = %d\n", dev );
			/* FIXME - this is a really weak test */
		    if (( argc == 3 ) && ( dev > fpga_count() )) { /* must be buffer ptr */
				PRINTF(__FUNCTION__": Assuming buffer pointer in arg 3\n");
			    fpga_data = (void *)dev;
				PRINTF(__FUNCTION__": fpga_data = 0x%x\n", (uint)fpga_data );
			    dev = FPGA_INVALID_DEVICE;  /* reset device num */
		    }
	    case 2: /* fpga <op> */
		    op = (int)fpga_get_op( argv[1] );
		    break;
	    default:
			PRINTF(__FUNCTION__": Too many or too few args (%d)\n", argc );
		    op = FPGA_NONE;    /* force usage display */
		    break;
    }

    switch ( op ) {
	    case FPGA_NONE:
		    fpga_usage( cmdtp );
		    break;

	    case FPGA_INFO:
		    rc = fpga_info( dev );
		    break;

	    case FPGA_LOAD:
                    rc = fpga_load( dev, fpga_data, data_size );
		    break;

	    case FPGA_DUMP:
                    rc = fpga_dump( dev, fpga_data, data_size );
		    break;

	    default:
		    printf( "Unknown operation.\n" );
		    fpga_usage( cmdtp );
		    break;
    }
    return (rc);
}

static void fpga_usage ( cmd_tbl_t *cmdtp )
{
	printf( "Usage:\n%s\n", cmdtp->usage );
}

/*
 * Map op to supported operations.  We don't use a table since we
 * would just have to relocate it from flash anyway.
 */
static int fpga_get_op( char *opstr )
{
	int op = FPGA_NONE;

	if (!strcmp ("info", opstr)) {
		op = FPGA_INFO;
	}
	else if (!strcmp ("load", opstr)) {
		op = FPGA_LOAD;
	}
	else if (!strcmp ("dump", opstr)) {
		op = FPGA_DUMP;
	}

	if ( op == FPGA_NONE ) {
		printf ("Unknown fpga operation \"%s\"\n", opstr);
	}
	return op;
}

U_BOOT_CMD(
	fpga,    6,     1,     do_fpga,
	"fpga   - loadable FPGA image support\n",
	"fpga [operation type] [device number] [image address] [image size]\n"
	"fpga operations:\n"
	"\tinfo\tlist known device information.\n"
	"\tload\tLoad device from memory buffer.\n"
	"\tdump\tLoad device to memory buffer.\n"
);
#endif	/* CONFIG_FPGA && CONFIG_COMMANDS & CFG_CMD_FPGA */