[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>

#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 = (char *)din;
		for(j = 0; j < ((bitlen + 7) / 8); j++) {
			printf("%02X", *cp++);
		}
		printf("\n");
	}

	return rcode;
}

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

U_BOOT_CMD(
	sspi,	5,	1,	do_spi,
	"sspi    - SPI utility commands\n",
	"<device> <bit_len> <dout> - Send <bit_len> bits from <dout> out the SPI\n"
	"<device>  - Identifies the chip select of the device\n"
	"<bit_len> - Number of bits to send (base 10)\n"
	"<dout>    - Hexadecimal string that gets sent\n"
);

#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>
e3093091 WD	31
	32	#if (CONFIG_COMMANDS & CFG_CMD_SPI)
	33
eb9401e3 WD	34	/*-----------------------------------------------------------------------
	35	* Definitions
	36	*/
	37
	38	#ifndef MAX_SPI_BYTES
	39	# define MAX_SPI_BYTES 32 /* Maximum number of bytes we can handle */
	40	#endif
e3093091 WD	41
	42	/*
	43	* External table of chip select functions (see the appropriate board
	44	* support for the actual definition of the table).
	45	*/
	46	extern spi_chipsel_type spi_chipsel[];
eb9401e3	47	extern int spi_chipsel_cnt;
e3093091 WD	48
	49	/*
	50	* Values from last command.
	51	*/
	52	static int device;
	53	static int bitlen;
	54	static uchar dout[MAX_SPI_BYTES];
	55	static uchar din[MAX_SPI_BYTES];
	56
	57	/*
	58	* SPI read/write
	59	*
	60	* Syntax:
	61	* spi {dev} {num_bits} {dout}
	62	* {dev} is the device number for controlling chip select (see TBD)
	63	* {num_bits} is the number of bits to send & receive (base 10)
	64	* {dout} is a hexadecimal string of data to send
	65	* The command prints out the hexadecimal string received via SPI.
	66	*/
	67
eb9401e3	68	int do_spi (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
e3093091 WD	69	{
	70	char *cp = 0;
	71	uchar tmp;
	72	int j;
	73	int rcode = 0;
	74
	75	/*
	76	* We use the last specified parameters, unless new ones are
	77	* entered.
	78	*/
	79
	80	if ((flag & CMD_FLAG_REPEAT) == 0)
	81	{
	82	if (argc >= 2)
	83	device = simple_strtoul(argv[1], NULL, 10);
	84	if (argc >= 3)
	85	bitlen = simple_strtoul(argv[2], NULL, 10);
eb9401e3 WD	86	if (argc >= 4) {
	87	cp = argv[3];
	88	for(j = 0; *cp; j++, cp++) {
	89	tmp = *cp - '0';
	90	if(tmp > 9)
	91	tmp -= ('A' - '0') - 10;
	92	if(tmp > 15)
	93	tmp -= ('a' - 'A');
	94	if(tmp > 15) {
	95	printf("Hex conversion error on %c, giving up.\n", *cp);
	96	return 1;
	97	}
	98	if((j % 2) == 0)
	99	dout[j / 2] = (tmp << 4);
	100	else
	101	dout[j / 2] \|= tmp;
e3093091	102	}
e3093091 WD	103	}
	104	}
	105
eb9401e3 WD	106	if ((device < 0) \|\| (device >= spi_chipsel_cnt)) {
	107	printf("Invalid device %d, giving up.\n", device);
	108	return 1;
8bde7f77	109	}
eb9401e3 WD	110	if ((bitlen < 0) \|\| (bitlen > (MAX_SPI_BYTES * 8))) {
	111	printf("Invalid bitlen %d, giving up.\n", bitlen);
	112	return 1;
8bde7f77	113	}
eb9401e3 WD	114
	115	debug ("spi_chipsel[%d] = %08X\n",
	116	device, (uint)spi_chipsel[device]);
	117
e3093091 WD	118	if(spi_xfer(spi_chipsel[device], bitlen, dout, din) != 0) {
	119	printf("Error with the SPI transaction.\n");
	120	rcode = 1;
	121	} else {
77ddac94	122	cp = (char *)din;
e3093091 WD	123	for(j = 0; j < ((bitlen + 7) / 8); j++) {
	124	printf("%02X", *cp++);
	125	}
	126	printf("\n");
	127	}
	128
	129	return rcode;
	130	}
	131
8bde7f77 WD	132	/***************************************************/
8bde7f77 WD	133
0d498393 WD	134	U_BOOT_CMD(
0d498393 WD	135	sspi, 5, 1, do_spi,
206c60cb	136	"sspi - SPI utility commands\n",
8bde7f77 WD	137	"<device> <bit_len> <dout> - Send <bit_len> bits from <dout> out the SPI\n"
	138	"<device> - Identifies the chip select of the device\n"
	139	"<bit_len> - Number of bits to send (base 10)\n"
	140	"<dout> - Hexadecimal string that gets sent\n"
	141	);
	142
e3093091	143	#endif /* CFG_CMD_SPI */