1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
22e192b24SSimon Glass /*
32e192b24SSimon Glass * (C) Copyright 2002
42e192b24SSimon Glass * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
52e192b24SSimon Glass */
62e192b24SSimon Glass
72e192b24SSimon Glass /*
82e192b24SSimon Glass * SPI Read/Write Utilities
92e192b24SSimon Glass */
102e192b24SSimon Glass
112e192b24SSimon Glass #include <common.h>
122e192b24SSimon Glass #include <command.h>
132e192b24SSimon Glass #include <dm.h>
142e192b24SSimon Glass #include <errno.h>
152e192b24SSimon Glass #include <spi.h>
162e192b24SSimon Glass
172e192b24SSimon Glass /*-----------------------------------------------------------------------
182e192b24SSimon Glass * Definitions
192e192b24SSimon Glass */
202e192b24SSimon Glass
212e192b24SSimon Glass #ifndef MAX_SPI_BYTES
222e192b24SSimon Glass # define MAX_SPI_BYTES 32 /* Maximum number of bytes we can handle */
232e192b24SSimon Glass #endif
242e192b24SSimon Glass
252e192b24SSimon Glass /*
262e192b24SSimon Glass * Values from last command.
272e192b24SSimon Glass */
282e192b24SSimon Glass static unsigned int bus;
292e192b24SSimon Glass static unsigned int cs;
302e192b24SSimon Glass static unsigned int mode;
312e192b24SSimon Glass static int bitlen;
322e192b24SSimon Glass static uchar dout[MAX_SPI_BYTES];
332e192b24SSimon Glass static uchar din[MAX_SPI_BYTES];
342e192b24SSimon Glass
do_spi_xfer(int bus,int cs)352e192b24SSimon Glass static int do_spi_xfer(int bus, int cs)
362e192b24SSimon Glass {
372e192b24SSimon Glass struct spi_slave *slave;
382e192b24SSimon Glass int ret = 0;
392e192b24SSimon Glass
402e192b24SSimon Glass #ifdef CONFIG_DM_SPI
412e192b24SSimon Glass char name[30], *str;
422e192b24SSimon Glass struct udevice *dev;
432e192b24SSimon Glass
442e192b24SSimon Glass snprintf(name, sizeof(name), "generic_%d:%d", bus, cs);
452e192b24SSimon Glass str = strdup(name);
469caeb26cSPeng Fan if (!str)
479caeb26cSPeng Fan return -ENOMEM;
482e192b24SSimon Glass ret = spi_get_bus_and_cs(bus, cs, 1000000, mode, "spi_generic_drv",
492e192b24SSimon Glass str, &dev, &slave);
502e192b24SSimon Glass if (ret)
512e192b24SSimon Glass return ret;
522e192b24SSimon Glass #else
532e192b24SSimon Glass slave = spi_setup_slave(bus, cs, 1000000, mode);
542e192b24SSimon Glass if (!slave) {
552e192b24SSimon Glass printf("Invalid device %d:%d\n", bus, cs);
562e192b24SSimon Glass return -EINVAL;
572e192b24SSimon Glass }
582e192b24SSimon Glass #endif
592e192b24SSimon Glass
602e192b24SSimon Glass ret = spi_claim_bus(slave);
612e192b24SSimon Glass if (ret)
622e192b24SSimon Glass goto done;
632e192b24SSimon Glass ret = spi_xfer(slave, bitlen, dout, din,
642e192b24SSimon Glass SPI_XFER_BEGIN | SPI_XFER_END);
652e192b24SSimon Glass #ifndef CONFIG_DM_SPI
662e192b24SSimon Glass /* We don't get an error code in this case */
672e192b24SSimon Glass if (ret)
682e192b24SSimon Glass ret = -EIO;
692e192b24SSimon Glass #endif
702e192b24SSimon Glass if (ret) {
712e192b24SSimon Glass printf("Error %d during SPI transaction\n", ret);
722e192b24SSimon Glass } else {
732e192b24SSimon Glass int j;
742e192b24SSimon Glass
752e192b24SSimon Glass for (j = 0; j < ((bitlen + 7) / 8); j++)
762e192b24SSimon Glass printf("%02X", din[j]);
772e192b24SSimon Glass printf("\n");
782e192b24SSimon Glass }
792e192b24SSimon Glass done:
802e192b24SSimon Glass spi_release_bus(slave);
812e192b24SSimon Glass #ifndef CONFIG_DM_SPI
822e192b24SSimon Glass spi_free_slave(slave);
832e192b24SSimon Glass #endif
842e192b24SSimon Glass
852e192b24SSimon Glass return ret;
862e192b24SSimon Glass }
872e192b24SSimon Glass
882e192b24SSimon Glass /*
892e192b24SSimon Glass * SPI read/write
902e192b24SSimon Glass *
912e192b24SSimon Glass * Syntax:
922e192b24SSimon Glass * spi {dev} {num_bits} {dout}
932e192b24SSimon Glass * {dev} is the device number for controlling chip select (see TBD)
942e192b24SSimon Glass * {num_bits} is the number of bits to send & receive (base 10)
952e192b24SSimon Glass * {dout} is a hexadecimal string of data to send
962e192b24SSimon Glass * The command prints out the hexadecimal string received via SPI.
972e192b24SSimon Glass */
982e192b24SSimon Glass
do_spi(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])992e192b24SSimon Glass int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1002e192b24SSimon Glass {
1012e192b24SSimon Glass char *cp = 0;
1022e192b24SSimon Glass uchar tmp;
1032e192b24SSimon Glass int j;
1042e192b24SSimon Glass
1052e192b24SSimon Glass /*
1062e192b24SSimon Glass * We use the last specified parameters, unless new ones are
1072e192b24SSimon Glass * entered.
1082e192b24SSimon Glass */
1092e192b24SSimon Glass
1102e192b24SSimon Glass if ((flag & CMD_FLAG_REPEAT) == 0)
1112e192b24SSimon Glass {
1122e192b24SSimon Glass if (argc >= 2) {
1132e192b24SSimon Glass mode = CONFIG_DEFAULT_SPI_MODE;
1142e192b24SSimon Glass bus = simple_strtoul(argv[1], &cp, 10);
1152e192b24SSimon Glass if (*cp == ':') {
1162e192b24SSimon Glass cs = simple_strtoul(cp+1, &cp, 10);
1172e192b24SSimon Glass } else {
1182e192b24SSimon Glass cs = bus;
1192e192b24SSimon Glass bus = CONFIG_DEFAULT_SPI_BUS;
1202e192b24SSimon Glass }
1212e192b24SSimon Glass if (*cp == '.')
1222e192b24SSimon Glass mode = simple_strtoul(cp+1, NULL, 10);
1232e192b24SSimon Glass }
1242e192b24SSimon Glass if (argc >= 3)
1252e192b24SSimon Glass bitlen = simple_strtoul(argv[2], NULL, 10);
1262e192b24SSimon Glass if (argc >= 4) {
1272e192b24SSimon Glass cp = argv[3];
1282e192b24SSimon Glass for(j = 0; *cp; j++, cp++) {
1292e192b24SSimon Glass tmp = *cp - '0';
1302e192b24SSimon Glass if(tmp > 9)
1312e192b24SSimon Glass tmp -= ('A' - '0') - 10;
1322e192b24SSimon Glass if(tmp > 15)
1332e192b24SSimon Glass tmp -= ('a' - 'A');
1342e192b24SSimon Glass if(tmp > 15) {
1352e192b24SSimon Glass printf("Hex conversion error on %c\n", *cp);
1362e192b24SSimon Glass return 1;
1372e192b24SSimon Glass }
1382e192b24SSimon Glass if((j % 2) == 0)
1392e192b24SSimon Glass dout[j / 2] = (tmp << 4);
1402e192b24SSimon Glass else
1412e192b24SSimon Glass dout[j / 2] |= tmp;
1422e192b24SSimon Glass }
1432e192b24SSimon Glass }
1442e192b24SSimon Glass }
1452e192b24SSimon Glass
1462e192b24SSimon Glass if ((bitlen < 0) || (bitlen > (MAX_SPI_BYTES * 8))) {
1472e192b24SSimon Glass printf("Invalid bitlen %d\n", bitlen);
1482e192b24SSimon Glass return 1;
1492e192b24SSimon Glass }
1502e192b24SSimon Glass
1512e192b24SSimon Glass if (do_spi_xfer(bus, cs))
1522e192b24SSimon Glass return 1;
1532e192b24SSimon Glass
1542e192b24SSimon Glass return 0;
1552e192b24SSimon Glass }
1562e192b24SSimon Glass
1572e192b24SSimon Glass /***************************************************/
1582e192b24SSimon Glass
1592e192b24SSimon Glass U_BOOT_CMD(
1602e192b24SSimon Glass sspi, 5, 1, do_spi,
1612e192b24SSimon Glass "SPI utility command",
1622e192b24SSimon Glass "[<bus>:]<cs>[.<mode>] <bit_len> <dout> - Send and receive bits\n"
1632e192b24SSimon Glass "<bus> - Identifies the SPI bus\n"
1642e192b24SSimon Glass "<cs> - Identifies the chip select\n"
1652e192b24SSimon Glass "<mode> - Identifies the SPI mode to use\n"
1662e192b24SSimon Glass "<bit_len> - Number of bits to send (base 10)\n"
1672e192b24SSimon Glass "<dout> - Hexadecimal string that gets sent"
1682e192b24SSimon Glass );
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