[people/ms/u-boot.git] / common / cmd_spi.c

/*
 * (C) Copyright 2002
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * SPI Read/Write Utilities
 */

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

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

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

#ifndef CONFIG_DEFAULT_SPI_BUS
#   define CONFIG_DEFAULT_SPI_BUS	0
#endif
#ifndef CONFIG_DEFAULT_SPI_MODE
#   define CONFIG_DEFAULT_SPI_MODE	SPI_MODE_0
#endif

/*
 * Values from last command.
 */
static unsigned int	bus;
static unsigned int	cs;
static unsigned int	mode;
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 * const argv[])
{
	struct spi_slave *slave;
	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) {
			mode = CONFIG_DEFAULT_SPI_MODE;
			bus = simple_strtoul(argv[1], &cp, 10);
			if (*cp == ':') {
				cs = simple_strtoul(cp+1, &cp, 10);
			} else {
				cs = bus;
				bus = CONFIG_DEFAULT_SPI_BUS;
			}
			if (*cp == '.')
				mode = simple_strtoul(cp+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\n", *cp);
					return 1;
				}
				if((j % 2) == 0)
					dout[j / 2] = (tmp << 4);
				else
					dout[j / 2] |= tmp;
			}
		}
	}

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

	slave = spi_setup_slave(bus, cs, 1000000, mode);
	if (!slave) {
		printf("Invalid device %d:%d\n", bus, cs);
		return 1;
	}

	spi_claim_bus(slave);
	if(spi_xfer(slave, bitlen, dout, din,
				SPI_XFER_BEGIN | SPI_XFER_END) != 0) {
		printf("Error during SPI transaction\n");
		rcode = 1;
	} else {
		for(j = 0; j < ((bitlen + 7) / 8); j++) {
			printf("%02X", din[j]);
		}
		printf("\n");
	}
	spi_release_bus(slave);
	spi_free_slave(slave);

	return rcode;
}

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

U_BOOT_CMD(
	sspi,	5,	1,	do_spi,
	"SPI utility command",
	"[<bus>:]<cs>[.<mode>] <bit_len> <dout> - Send and receive bits\n"
	"<bus>     - Identifies the SPI bus\n"
	"<cs>      - Identifies the chip select\n"
	"<mode>    - Identifies the SPI mode to use\n"
	"<bit_len> - Number of bits to send (base 10)\n"
	"<dout>    - Hexadecimal string that gets sent"
);
Commit	Line	Data
e3093091 WD	1	/*
	2	* (C) Copyright 2002
	3	* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
e3093091 WD	6	*/
	7
	8	/*
	9	* SPI Read/Write Utilities
	10	*/
	11
	12	#include <common.h>
	13	#include <command.h>
	14	#include <spi.h>
e3093091	15
eb9401e3 WD	16	/*-----------------------------------------------------------------------
	17	* Definitions
	18	*/
	19
	20	#ifndef MAX_SPI_BYTES
	21	# define MAX_SPI_BYTES 32 /* Maximum number of bytes we can handle */
	22	#endif
e3093091	23
d255bb0e HS	24	#ifndef CONFIG_DEFAULT_SPI_BUS
	25	# define CONFIG_DEFAULT_SPI_BUS 0
	26	#endif
	27	#ifndef CONFIG_DEFAULT_SPI_MODE
	28	# define CONFIG_DEFAULT_SPI_MODE SPI_MODE_0
	29	#endif
e3093091 WD	30
	31	/*
	32	* Values from last command.
	33	*/
21032b35 RM	34	static unsigned int bus;
	35	static unsigned int cs;
	36	static unsigned int mode;
d255bb0e HS	37	static int bitlen;
	38	static uchar dout[MAX_SPI_BYTES];
	39	static uchar din[MAX_SPI_BYTES];
e3093091 WD	40
	41	/*
	42	* SPI read/write
	43	*
	44	* Syntax:
	45	* spi {dev} {num_bits} {dout}
	46	* {dev} is the device number for controlling chip select (see TBD)
	47	* {num_bits} is the number of bits to send & receive (base 10)
	48	* {dout} is a hexadecimal string of data to send
	49	* The command prints out the hexadecimal string received via SPI.
	50	*/
	51
54841ab5	52	int do_spi (cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
e3093091	53	{
d255bb0e	54	struct spi_slave *slave;
e3093091 WD	55	char *cp = 0;
	56	uchar tmp;
	57	int j;
	58	int rcode = 0;
	59
	60	/*
	61	* We use the last specified parameters, unless new ones are
	62	* entered.
	63	*/
	64
	65	if ((flag & CMD_FLAG_REPEAT) == 0)
	66	{
21032b35 RM	67	if (argc >= 2) {
	68	mode = CONFIG_DEFAULT_SPI_MODE;
	69	bus = simple_strtoul(argv[1], &cp, 10);
	70	if (*cp == ':') {
	71	cs = simple_strtoul(cp+1, &cp, 10);
	72	} else {
	73	cs = bus;
	74	bus = CONFIG_DEFAULT_SPI_BUS;
	75	}
2d5e7c7a	76	if (*cp == '.')
21032b35 RM	77	mode = simple_strtoul(cp+1, NULL, 10);
21032b35 RM	78	}
e3093091 WD	79	if (argc >= 3)
e3093091 WD	80	bitlen = simple_strtoul(argv[2], NULL, 10);
eb9401e3 WD	81	if (argc >= 4) {
	82	cp = argv[3];
	83	for(j = 0; *cp; j++, cp++) {
	84	tmp = *cp - '0';
	85	if(tmp > 9)
	86	tmp -= ('A' - '0') - 10;
	87	if(tmp > 15)
	88	tmp -= ('a' - 'A');
	89	if(tmp > 15) {
21032b35	90	printf("Hex conversion error on %c\n", *cp);
eb9401e3 WD	91	return 1;
	92	}
	93	if((j % 2) == 0)
	94	dout[j / 2] = (tmp << 4);
	95	else
	96	dout[j / 2] \|= tmp;
e3093091	97	}
e3093091 WD	98	}
	99	}
	100
eb9401e3	101	if ((bitlen < 0) \|\| (bitlen > (MAX_SPI_BYTES * 8))) {
21032b35	102	printf("Invalid bitlen %d\n", bitlen);
eb9401e3	103	return 1;
8bde7f77	104	}
eb9401e3	105
21032b35	106	slave = spi_setup_slave(bus, cs, 1000000, mode);
d255bb0e	107	if (!slave) {
21032b35	108	printf("Invalid device %d:%d\n", bus, cs);
d255bb0e HS	109	return 1;
	110	}
	111
d255bb0e HS	112	spi_claim_bus(slave);
	113	if(spi_xfer(slave, bitlen, dout, din,
	114	SPI_XFER_BEGIN \| SPI_XFER_END) != 0) {
21032b35	115	printf("Error during SPI transaction\n");
e3093091 WD	116	rcode = 1;
e3093091 WD	117	} else {
e3093091	118	for(j = 0; j < ((bitlen + 7) / 8); j++) {
c46980f6	119	printf("%02X", din[j]);
e3093091 WD	120	}
	121	printf("\n");
	122	}
d255bb0e HS	123	spi_release_bus(slave);
d255bb0e HS	124	spi_free_slave(slave);
e3093091 WD	125
	126	return rcode;
	127	}
	128
8bde7f77 WD	129	/***************************************************/
8bde7f77 WD	130
0d498393 WD	131	U_BOOT_CMD(
0d498393 WD	132	sspi, 5, 1, do_spi,
21032b35 RM	133	"SPI utility command",
	134	"[<bus>:]<cs>[.<mode>] <bit_len> <dout> - Send and receive bits\n"
	135	"<bus> - Identifies the SPI bus\n"
	136	"<cs> - Identifies the chip select\n"
	137	"<mode> - Identifies the SPI mode to use\n"
8bde7f77	138	"<bit_len> - Number of bits to send (base 10)\n"
a89c33db	139	"<dout> - Hexadecimal string that gets sent"
8bde7f77	140	);