common/cmd_spi.c

/*
 * (C) Copyright 2002
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.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
 */

/*
 * SPI Read/Write Utilities
 */

#include <common.h>
#include <command.h>
#include <spi.h>

#if (CONFIG_COMMANDS & CFG_CMD_SPI)

#ifndef MAX_SPI_BYTES
#   define MAX_SPI_BYTES 32     /* Maximum number of bytes we can handle */
#endif
static uchar dout[MAX_SPI_BYTES];
static uchar din[MAX_SPI_BYTES];

int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
        int   rcode = 0;
        int i;
	int cs;
	int len;

        if (argc < 3)
	{
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}

	if (strcmp(argv[1],"read") == 0) {
		cs = simple_strtoul(argv[2], NULL, 10);
		if(argc == 4)
		{		
			len = simple_strtoul(argv[3], NULL, 16);
		}
		else
		{
			printf ("Usage:\n%s\n", cmdtp->usage);
		}
		printf("Read cs %d: ",cs);
		for(i = 0; i < len; i++)
		{
			c2k_spi_read(cs, &dout, 1);
			printf("%02x ",dout[0]);
		}
		printf("\n");
	}

	else if (strcmp(argv[1],"write") == 0) {
		cs = simple_strtoul(argv[2], NULL, 10);
		
		printf("Write cs %d: ",cs);
		for (i = 3; i < argc; i++)
		{
			din[0] = simple_strtoul(argv[i], NULL, 16);
			c2k_spi_write(cs, &din, 1);
			printf("%02x ",din[0]);
		}
		printf("\n");
	}
	else
	{
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}
	
}

/***************************************************/

U_BOOT_CMD(
	spi,	32,	1,	do_spi,
	"spi     - SPI utility commands\n",
	"spi read chipselect len - Read len number of bytes from the SPI device \n"
	"spi write chipselect byte0 <byte1> <byte2> ... - Write bytes to the SPI device\n"
);
#endif