[people/ms/u-boot.git] / 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>
#include <cmd_spi.h>

#if (CONFIG_COMMANDS & CFG_CMD_SPI)

/*-----------------------------------------------------------------------
 * Definitions
 */

#ifndef MAX_SPI_BYTES
#   define MAX_SPI_BYTES 32	/* Maximum number of bytes we can handle */
#endif

/*
 * External table of chip select functions (see the appropriate board
 * support for the actual definition of the table).
 */
extern spi_chipsel_type spi_chipsel[];
extern int spi_chipsel_cnt;

/*
 * Values from last command.
 */
static int   device;
static int   bitlen;
static uchar dout[MAX_SPI_BYTES];
static uchar din[MAX_SPI_BYTES];

/*
 * SPI read/write
 *
 * Syntax:
 *   spi {dev} {num_bits} {dout}
 *     {dev} is the device number for controlling chip select (see TBD)
 *     {num_bits} is the number of bits to send & receive (base 10)
 *     {dout} is a hexadecimal string of data to send
 * The command prints out the hexadecimal string received via SPI.
 */

int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	char  *cp = 0;
	uchar tmp;
	int   j;
	int   rcode = 0;

	/*
	 * We use the last specified parameters, unless new ones are
	 * entered.
	 */

	if ((flag & CMD_FLAG_REPEAT) == 0)
	{
		if (argc >= 2)
			device = simple_strtoul(argv[1], NULL, 10);
		if (argc >= 3)
			bitlen = simple_strtoul(argv[2], NULL, 10);
		if (argc >= 4) {
			cp = argv[3];
			for(j = 0; *cp; j++, cp++) {
				tmp = *cp - '0';
				if(tmp > 9)
					tmp -= ('A' - '0') - 10;
				if(tmp > 15)
					tmp -= ('a' - 'A');
				if(tmp > 15) {
					printf("Hex conversion error on %c, giving up.\n", *cp);
					return 1;
				}
				if((j % 2) == 0)
					dout[j / 2] = (tmp << 4);
				else
					dout[j / 2] |= tmp;
			}
		}
	}

	if ((device < 0) || (device >=  spi_chipsel_cnt)) {
		printf("Invalid device %d, giving up.\n", device);
		return 1;
	} 
	if ((bitlen < 0) || (bitlen >  (MAX_SPI_BYTES * 8))) {
		printf("Invalid bitlen %d, giving up.\n", bitlen);
		return 1;
	} 

	debug ("spi_chipsel[%d] = %08X\n",
		device, (uint)spi_chipsel[device]);

	if(spi_xfer(spi_chipsel[device], bitlen, dout, din) != 0) {
		printf("Error with the SPI transaction.\n");
		rcode = 1;
	} else {
		cp = din;
		for(j = 0; j < ((bitlen + 7) / 8); j++) {
			printf("%02X", *cp++);
		}
		printf("\n");
	}

	return rcode;
}

#endif	/* CFG_CMD_SPI */
Commit	Line	Data
e3093091 WD	1	/*
	2	* (C) Copyright 2002
	3	* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.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	* SPI Read/Write Utilities
	26	*/
	27
	28	#include <common.h>
	29	#include <command.h>
	30	#include <spi.h>
	31	#include <cmd_spi.h>
	32
	33	#if (CONFIG_COMMANDS & CFG_CMD_SPI)
	34
eb9401e3 WD	35	/*-----------------------------------------------------------------------
	36	* Definitions
	37	*/
	38
	39	#ifndef MAX_SPI_BYTES
	40	# define MAX_SPI_BYTES 32 /* Maximum number of bytes we can handle */
	41	#endif
e3093091 WD	42
	43	/*
	44	* External table of chip select functions (see the appropriate board
	45	* support for the actual definition of the table).
	46	*/
	47	extern spi_chipsel_type spi_chipsel[];
eb9401e3	48	extern int spi_chipsel_cnt;
e3093091 WD	49
	50	/*
	51	* Values from last command.
	52	*/
	53	static int device;
	54	static int bitlen;
	55	static uchar dout[MAX_SPI_BYTES];
	56	static uchar din[MAX_SPI_BYTES];
	57
	58	/*
	59	* SPI read/write
	60	*
	61	* Syntax:
	62	* spi {dev} {num_bits} {dout}
	63	* {dev} is the device number for controlling chip select (see TBD)
	64	* {num_bits} is the number of bits to send & receive (base 10)
	65	* {dout} is a hexadecimal string of data to send
	66	* The command prints out the hexadecimal string received via SPI.
	67	*/
	68
eb9401e3	69	int do_spi (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
e3093091 WD	70	{
	71	char *cp = 0;
	72	uchar tmp;
	73	int j;
	74	int rcode = 0;
	75
	76	/*
	77	* We use the last specified parameters, unless new ones are
	78	* entered.
	79	*/
	80
	81	if ((flag & CMD_FLAG_REPEAT) == 0)
	82	{
	83	if (argc >= 2)
	84	device = simple_strtoul(argv[1], NULL, 10);
	85	if (argc >= 3)
	86	bitlen = simple_strtoul(argv[2], NULL, 10);
eb9401e3 WD	87	if (argc >= 4) {
	88	cp = argv[3];
	89	for(j = 0; *cp; j++, cp++) {
	90	tmp = *cp - '0';
	91	if(tmp > 9)
	92	tmp -= ('A' - '0') - 10;
	93	if(tmp > 15)
	94	tmp -= ('a' - 'A');
	95	if(tmp > 15) {
	96	printf("Hex conversion error on %c, giving up.\n", *cp);
	97	return 1;
	98	}
	99	if((j % 2) == 0)
	100	dout[j / 2] = (tmp << 4);
	101	else
	102	dout[j / 2] \|= tmp;
e3093091	103	}
e3093091 WD	104	}
	105	}
	106
eb9401e3 WD	107	if ((device < 0) \|\| (device >= spi_chipsel_cnt)) {
	108	printf("Invalid device %d, giving up.\n", device);
	109	return 1;
	110	}
	111	if ((bitlen < 0) \|\| (bitlen > (MAX_SPI_BYTES * 8))) {
	112	printf("Invalid bitlen %d, giving up.\n", bitlen);
	113	return 1;
	114	}
	115
	116	debug ("spi_chipsel[%d] = %08X\n",
	117	device, (uint)spi_chipsel[device]);
	118
e3093091 WD	119	if(spi_xfer(spi_chipsel[device], bitlen, dout, din) != 0) {
	120	printf("Error with the SPI transaction.\n");
	121	rcode = 1;
	122	} else {
	123	cp = din;
	124	for(j = 0; j < ((bitlen + 7) / 8); j++) {
	125	printf("%02X", *cp++);
	126	}
	127	printf("\n");
	128	}
	129
	130	return rcode;
	131	}
	132
	133	#endif /* CFG_CMD_SPI */