[thirdparty/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 <errno.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];

static int do_spi_xfer(int bus, int cs)
{
	struct spi_slave *slave;
	int rcode = 0;

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

	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 = -EIO;
	} else {
		int j;

		for (j = 0; j < ((bitlen + 7) / 8); j++)
			printf("%02X", din[j]);
		printf("\n");
	}
	spi_release_bus(slave);
	spi_free_slave(slave);

	return rcode;
}

/*
 * 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[])
{
	char  *cp = 0;
	uchar tmp;
	int   j;

	/*
	 * 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;
	}

	if (do_spi_xfer(bus, cs))
		return 1;

	return 0;
}

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

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>
df3b23ae	14	#include <errno.h>
e3093091	15	#include <spi.h>
e3093091	16
eb9401e3 WD	17	/*-----------------------------------------------------------------------
	18	* Definitions
	19	*/
	20
	21	#ifndef MAX_SPI_BYTES
	22	# define MAX_SPI_BYTES 32 /* Maximum number of bytes we can handle */
	23	#endif
e3093091	24
d255bb0e HS	25	#ifndef CONFIG_DEFAULT_SPI_BUS
	26	# define CONFIG_DEFAULT_SPI_BUS 0
	27	#endif
	28	#ifndef CONFIG_DEFAULT_SPI_MODE
	29	# define CONFIG_DEFAULT_SPI_MODE SPI_MODE_0
	30	#endif
e3093091 WD	31
	32	/*
	33	* Values from last command.
	34	*/
21032b35 RM	35	static unsigned int bus;
	36	static unsigned int cs;
	37	static unsigned int mode;
d255bb0e HS	38	static int bitlen;
	39	static uchar dout[MAX_SPI_BYTES];
	40	static uchar din[MAX_SPI_BYTES];
e3093091	41
df3b23ae SG	42	static int do_spi_xfer(int bus, int cs)
	43	{
	44	struct spi_slave *slave;
	45	int rcode = 0;
	46
	47	slave = spi_setup_slave(bus, cs, 1000000, mode);
	48	if (!slave) {
	49	printf("Invalid device %d:%d\n", bus, cs);
	50	return -EINVAL;
	51	}
	52
	53	spi_claim_bus(slave);
	54	if (spi_xfer(slave, bitlen, dout, din,
	55	SPI_XFER_BEGIN \| SPI_XFER_END) != 0) {
	56	printf("Error during SPI transaction\n");
	57	rcode = -EIO;
	58	} else {
	59	int j;
	60
	61	for (j = 0; j < ((bitlen + 7) / 8); j++)
	62	printf("%02X", din[j]);
	63	printf("\n");
	64	}
	65	spi_release_bus(slave);
	66	spi_free_slave(slave);
	67
	68	return rcode;
	69	}
	70
e3093091 WD	71	/*
	72	* SPI read/write
	73	*
	74	* Syntax:
	75	* spi {dev} {num_bits} {dout}
	76	* {dev} is the device number for controlling chip select (see TBD)
	77	* {num_bits} is the number of bits to send & receive (base 10)
	78	* {dout} is a hexadecimal string of data to send
	79	* The command prints out the hexadecimal string received via SPI.
	80	*/
	81
54841ab5	82	int do_spi (cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
e3093091 WD	83	{
	84	char *cp = 0;
	85	uchar tmp;
	86	int j;
e3093091 WD	87
	88	/*
	89	* We use the last specified parameters, unless new ones are
	90	* entered.
	91	*/
	92
	93	if ((flag & CMD_FLAG_REPEAT) == 0)
	94	{
21032b35 RM	95	if (argc >= 2) {
	96	mode = CONFIG_DEFAULT_SPI_MODE;
	97	bus = simple_strtoul(argv[1], &cp, 10);
	98	if (*cp == ':') {
	99	cs = simple_strtoul(cp+1, &cp, 10);
	100	} else {
	101	cs = bus;
	102	bus = CONFIG_DEFAULT_SPI_BUS;
	103	}
2d5e7c7a	104	if (*cp == '.')
21032b35 RM	105	mode = simple_strtoul(cp+1, NULL, 10);
21032b35 RM	106	}
e3093091 WD	107	if (argc >= 3)
e3093091 WD	108	bitlen = simple_strtoul(argv[2], NULL, 10);
eb9401e3 WD	109	if (argc >= 4) {
	110	cp = argv[3];
	111	for(j = 0; *cp; j++, cp++) {
	112	tmp = *cp - '0';
	113	if(tmp > 9)
	114	tmp -= ('A' - '0') - 10;
	115	if(tmp > 15)
	116	tmp -= ('a' - 'A');
	117	if(tmp > 15) {
21032b35	118	printf("Hex conversion error on %c\n", *cp);
eb9401e3 WD	119	return 1;
	120	}
	121	if((j % 2) == 0)
	122	dout[j / 2] = (tmp << 4);
	123	else
	124	dout[j / 2] \|= tmp;
e3093091	125	}
e3093091 WD	126	}
	127	}
	128
eb9401e3	129	if ((bitlen < 0) \|\| (bitlen > (MAX_SPI_BYTES * 8))) {
21032b35	130	printf("Invalid bitlen %d\n", bitlen);
eb9401e3	131	return 1;
8bde7f77	132	}
eb9401e3	133
df3b23ae	134	if (do_spi_xfer(bus, cs))
d255bb0e	135	return 1;
e3093091	136
df3b23ae	137	return 0;
e3093091 WD	138	}
e3093091 WD	139
8bde7f77 WD	140	/***************************************************/
8bde7f77 WD	141
0d498393 WD	142	U_BOOT_CMD(
0d498393 WD	143	sspi, 5, 1, do_spi,
21032b35 RM	144	"SPI utility command",
	145	"[<bus>:]<cs>[.<mode>] <bit_len> <dout> - Send and receive bits\n"
	146	"<bus> - Identifies the SPI bus\n"
	147	"<cs> - Identifies the chip select\n"
	148	"<mode> - Identifies the SPI mode to use\n"
8bde7f77	149	"<bit_len> - Number of bits to send (base 10)\n"
a89c33db	150	"<dout> - Hexadecimal string that gets sent"
8bde7f77	151	);