introduce spi command
usefull to debug spi The command allow to read/write on a spi device Usage: spi [OPTION] [data to write 0xXX] write/read spi device. -b <bus_num> spi bus number (default = 0) -r <count> to read -c <cs> chip select (default = 0) -m <mode> spi mode (default = 0) -f <hz> max_speed_hz (default = 1MHz) -w <bit> bits_per_word (default = 8) -v verbose Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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@ -597,6 +597,12 @@ config CMD_I2C
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include i2c_probe, i2c_read and i2c_write commands to communicate
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on i2c bus.
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config CMD_SPI
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bool
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depends on SPI
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prompt "spi command"
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help
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config CMD_LED
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bool
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depends on LED
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@ -55,6 +55,7 @@ obj-$(CONFIG_USB_GADGET_SERIAL) += usbserial.o
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obj-$(CONFIG_CMD_GPIO) += gpio.o
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obj-$(CONFIG_CMD_UNCOMPRESS) += uncompress.o
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obj-$(CONFIG_CMD_I2C) += i2c.o
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obj-$(CONFIG_CMD_SPI) += spi.o
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obj-$(CONFIG_CMD_UBI) += ubi.o
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obj-$(CONFIG_CMD_MENU) += menu.o
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obj-$(CONFIG_CMD_PASSWD) += passwd.o
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@ -0,0 +1,132 @@
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/*
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* Copyright (c) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* Under GPLv2 only
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <errno.h>
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#include <malloc.h>
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#include <getopt.h>
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#include <spi/spi.h>
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static int do_spi(int argc, char *argv[])
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{
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struct spi_device spi;
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int bus = 0;
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int read = 0;
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int verbose = 0;
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int opt, count, i, ret;
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int byte_per_word;
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u8 *tx_buf, *rx_buf;
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memset(&spi, 0, sizeof(struct spi_device));
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spi.max_speed_hz = 1 * 1000 * 1000;
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spi.bits_per_word = 8;
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while ((opt = getopt(argc, argv, "b:c:r:m:f:w:v")) > 0) {
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switch (opt) {
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case 'b':
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bus = simple_strtol(optarg, NULL, 0);
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break;
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case 'r':
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read = simple_strtol(optarg, NULL, 0);
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break;
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case 'c':
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spi.chip_select = simple_strtoul(optarg, NULL, 0);
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break;
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case 'm':
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spi.mode = simple_strtoul(optarg, NULL, 0);
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break;
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case 'f':
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spi.max_speed_hz = simple_strtoul(optarg, NULL, 0);
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break;
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case 'w':
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spi.bits_per_word = simple_strtoul(optarg, NULL, 0);
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break;
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case 'v':
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verbose = 1;
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break;
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default:
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return COMMAND_ERROR_USAGE;
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}
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}
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count = argc - optind;
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if ((!read && !count) || !spi.max_speed_hz || !spi.bits_per_word)
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return COMMAND_ERROR_USAGE;
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spi.master = spi_get_master(bus);
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if (!spi.master) {
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printf("spi bus %d not found\n", bus);
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return -ENODEV;
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}
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if (spi.chip_select > spi.master->num_chipselect) {
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printf("spi chip select (%d)> master num chipselect (%d)\n",
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spi.chip_select, spi.master->num_chipselect);
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return -EINVAL;
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}
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ret = spi.master->setup(&spi);
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if (ret) {
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printf("can not setup the master (%d)\n", ret);
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return ret;
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}
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tx_buf = xmalloc(count);
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rx_buf = xmalloc(count);
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for (i = 0; i < count; i++)
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tx_buf[i] = (u8) simple_strtol(argv[optind + i], NULL, 16);
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ret = spi_write_then_read(&spi, tx_buf, count, rx_buf, read);
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if (ret)
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goto out;
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byte_per_word = max(spi.bits_per_word / 8, 1);
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if (verbose) {
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printf("device config\n");
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printf(" bus_num = %d\n", spi.master->bus_num);
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printf(" max_speed_hz = %d\n", spi.max_speed_hz);
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printf(" chip_select = %d\n", spi.chip_select);
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printf(" mode = 0x%x\n", spi.mode);
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printf(" bits_per_word = %d\n", spi.bits_per_word);
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printf("\n");
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printf("wrote %i bytes\n", count);
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memory_display(tx_buf, 0, count, byte_per_word);
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printf("read %i bytes\n", read);
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}
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memory_display(rx_buf, 0, read, byte_per_word);
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out:
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free(rx_buf);
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free(tx_buf);
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return ret;
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}
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static const __maybe_unused char cmd_spi_help[] =
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"Usage: spi [OPTION] [data to write 0xXX]\n"
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"write/read spi device.\n"
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" -b <bus_num> spi bus number (default = 0)\n"
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" -r <count> to read\n"
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" -c <cs> chip select (default = 0)\n"
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" -m <mode> spi mode (default = 0)\n"
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" -f <hz> max_speed_hz (default = 1MHz)\n"
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" -w <bit> bits_per_word (default = 8)\n"
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" -v verbose\n";
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BAREBOX_CMD_START(spi)
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.cmd = do_spi,
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.usage = "write/read spi device",
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BAREBOX_CMD_HELP(cmd_spi_help)
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BAREBOX_CMD_END
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