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Diffstat (limited to 'tools/spi/spidev_test.c')
-rw-r--r--tools/spi/spidev_test.c169
1 files changed, 110 insertions, 59 deletions
diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 4c12e6aea5d5..f2135d619a0b 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* SPI testing utility (using spidev driver)
*
* Copyright (c) 2007 MontaVista Software, Inc.
* Copyright (c) 2007 Anton Vorontsov <avorontsov@ru.mvista.com>
*
- * 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.
- *
* Cross-compile with cross-gcc -I/path/to/cross-kernel/include
*/
@@ -16,6 +13,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <errno.h>
#include <getopt.h>
#include <fcntl.h>
#include <time.h>
@@ -29,7 +27,11 @@
static void pabort(const char *s)
{
- perror(s);
+ if (errno != 0)
+ perror(s);
+ else
+ printf("%s\n", s);
+
abort();
}
@@ -40,12 +42,13 @@ static char *input_file;
static char *output_file;
static uint32_t speed = 500000;
static uint16_t delay;
+static uint16_t word_delay;
static int verbose;
static int transfer_size;
static int iterations;
static int interval = 5; /* interval in seconds for showing transfer rate */
-uint8_t default_tx[] = {
+static uint8_t default_tx[] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
@@ -54,8 +57,8 @@ uint8_t default_tx[] = {
0xF0, 0x0D,
};
-uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };
-char *input_tx;
+static uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };
+static char *input_tx;
static void hex_dump(const void *src, size_t length, size_t line_size,
char *prefix)
@@ -122,22 +125,27 @@ static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
.rx_buf = (unsigned long)rx,
.len = len,
.delay_usecs = delay,
+ .word_delay_usecs = word_delay,
.speed_hz = speed,
.bits_per_word = bits,
};
- if (mode & SPI_TX_QUAD)
+ if (mode & SPI_TX_OCTAL)
+ tr.tx_nbits = 8;
+ else if (mode & SPI_TX_QUAD)
tr.tx_nbits = 4;
else if (mode & SPI_TX_DUAL)
tr.tx_nbits = 2;
- if (mode & SPI_RX_QUAD)
+ if (mode & SPI_RX_OCTAL)
+ tr.rx_nbits = 8;
+ else if (mode & SPI_RX_QUAD)
tr.rx_nbits = 4;
else if (mode & SPI_RX_DUAL)
tr.rx_nbits = 2;
if (!(mode & SPI_LOOP)) {
- if (mode & (SPI_TX_QUAD | SPI_TX_DUAL))
+ if (mode & (SPI_TX_OCTAL | SPI_TX_QUAD | SPI_TX_DUAL))
tr.rx_buf = 0;
- else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL))
+ else if (mode & (SPI_RX_OCTAL | SPI_RX_QUAD | SPI_RX_DUAL))
tr.tx_buf = 0;
}
@@ -166,27 +174,38 @@ static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
static void print_usage(const char *prog)
{
- printf("Usage: %s [-DsbdlHOLC3vpNR24SI]\n", prog);
- puts(" -D --device device to use (default /dev/spidev1.1)\n"
- " -s --speed max speed (Hz)\n"
- " -d --delay delay (usec)\n"
- " -b --bpw bits per word\n"
- " -i --input input data from a file (e.g. \"test.bin\")\n"
- " -o --output output data to a file (e.g. \"results.bin\")\n"
- " -l --loop loopback\n"
- " -H --cpha clock phase\n"
- " -O --cpol clock polarity\n"
- " -L --lsb least significant bit first\n"
- " -C --cs-high chip select active high\n"
- " -3 --3wire SI/SO signals shared\n"
- " -v --verbose Verbose (show tx buffer)\n"
- " -p Send data (e.g. \"1234\\xde\\xad\")\n"
- " -N --no-cs no chip select\n"
- " -R --ready slave pulls low to pause\n"
- " -2 --dual dual transfer\n"
- " -4 --quad quad transfer\n"
- " -S --size transfer size\n"
- " -I --iter iterations\n");
+ printf("Usage: %s [-2348CDFHILMNORSZbdilopsvw]\n", prog);
+ puts("general device settings:\n"
+ " -D --device device to use (default /dev/spidev1.1)\n"
+ " -s --speed max speed (Hz)\n"
+ " -d --delay delay (usec)\n"
+ " -w --word-delay word delay (usec)\n"
+ " -l --loop loopback\n"
+ "spi mode:\n"
+ " -H --cpha clock phase\n"
+ " -O --cpol clock polarity\n"
+ " -F --rx-cpha-flip flip CPHA on Rx only xfer\n"
+ "number of wires for transmission:\n"
+ " -2 --dual dual transfer\n"
+ " -4 --quad quad transfer\n"
+ " -8 --octal octal transfer\n"
+ " -3 --3wire SI/SO signals shared\n"
+ " -Z --3wire-hiz high impedance turnaround\n"
+ "data:\n"
+ " -i --input input data from a file (e.g. \"test.bin\")\n"
+ " -o --output output data to a file (e.g. \"results.bin\")\n"
+ " -p Send data (e.g. \"1234\\xde\\xad\")\n"
+ " -S --size transfer size\n"
+ " -I --iter iterations\n"
+ "additional parameters:\n"
+ " -b --bpw bits per word\n"
+ " -L --lsb least significant bit first\n"
+ " -C --cs-high chip select active high\n"
+ " -N --no-cs no chip select\n"
+ " -R --ready slave pulls low to pause\n"
+ " -M --mosi-idle-low leave mosi line low when idle\n"
+ "misc:\n"
+ " -v --verbose Verbose (show tx buffer)\n");
exit(1);
}
@@ -194,30 +213,35 @@ static void parse_opts(int argc, char *argv[])
{
while (1) {
static const struct option lopts[] = {
- { "device", 1, 0, 'D' },
- { "speed", 1, 0, 's' },
- { "delay", 1, 0, 'd' },
- { "bpw", 1, 0, 'b' },
- { "input", 1, 0, 'i' },
- { "output", 1, 0, 'o' },
- { "loop", 0, 0, 'l' },
- { "cpha", 0, 0, 'H' },
- { "cpol", 0, 0, 'O' },
- { "lsb", 0, 0, 'L' },
- { "cs-high", 0, 0, 'C' },
- { "3wire", 0, 0, '3' },
- { "no-cs", 0, 0, 'N' },
- { "ready", 0, 0, 'R' },
- { "dual", 0, 0, '2' },
- { "verbose", 0, 0, 'v' },
- { "quad", 0, 0, '4' },
- { "size", 1, 0, 'S' },
- { "iter", 1, 0, 'I' },
+ { "device", 1, 0, 'D' },
+ { "speed", 1, 0, 's' },
+ { "delay", 1, 0, 'd' },
+ { "word-delay", 1, 0, 'w' },
+ { "loop", 0, 0, 'l' },
+ { "cpha", 0, 0, 'H' },
+ { "cpol", 0, 0, 'O' },
+ { "rx-cpha-flip", 0, 0, 'F' },
+ { "dual", 0, 0, '2' },
+ { "quad", 0, 0, '4' },
+ { "octal", 0, 0, '8' },
+ { "3wire", 0, 0, '3' },
+ { "3wire-hiz", 0, 0, 'Z' },
+ { "input", 1, 0, 'i' },
+ { "output", 1, 0, 'o' },
+ { "size", 1, 0, 'S' },
+ { "iter", 1, 0, 'I' },
+ { "bpw", 1, 0, 'b' },
+ { "lsb", 0, 0, 'L' },
+ { "cs-high", 0, 0, 'C' },
+ { "no-cs", 0, 0, 'N' },
+ { "ready", 0, 0, 'R' },
+ { "mosi-idle-low", 0, 0, 'M' },
+ { "verbose", 0, 0, 'v' },
{ NULL, 0, 0, 0 },
};
int c;
- c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR24p:vS:I:",
+ c = getopt_long(argc, argv, "D:s:d:w:b:i:o:lHOLC3ZFMNR248p:vS:I:",
lopts, NULL);
if (c == -1)
@@ -233,6 +257,9 @@ static void parse_opts(int argc, char *argv[])
case 'd':
delay = atoi(optarg);
break;
+ case 'w':
+ word_delay = atoi(optarg);
+ break;
case 'b':
bits = atoi(optarg);
break;
@@ -260,6 +287,15 @@ static void parse_opts(int argc, char *argv[])
case '3':
mode |= SPI_3WIRE;
break;
+ case 'Z':
+ mode |= SPI_3WIRE_HIZ;
+ break;
+ case 'F':
+ mode |= SPI_RX_CPHA_FLIP;
+ break;
+ case 'M':
+ mode |= SPI_MOSI_IDLE_LOW;
+ break;
case 'N':
mode |= SPI_NO_CS;
break;
@@ -278,6 +314,9 @@ static void parse_opts(int argc, char *argv[])
case '4':
mode |= SPI_TX_QUAD;
break;
+ case '8':
+ mode |= SPI_TX_OCTAL;
+ break;
case 'S':
transfer_size = atoi(optarg);
break;
@@ -286,7 +325,6 @@ static void parse_opts(int argc, char *argv[])
break;
default:
print_usage(argv[0]);
- break;
}
}
if (mode & SPI_LOOP) {
@@ -294,6 +332,8 @@ static void parse_opts(int argc, char *argv[])
mode |= SPI_RX_DUAL;
if (mode & SPI_TX_QUAD)
mode |= SPI_RX_QUAD;
+ if (mode & SPI_TX_OCTAL)
+ mode |= SPI_RX_OCTAL;
}
}
@@ -405,9 +445,13 @@ int main(int argc, char *argv[])
{
int ret = 0;
int fd;
+ uint32_t request;
parse_opts(argc, argv);
+ if (input_tx && input_file)
+ pabort("only one of -p and --input may be selected");
+
fd = open(device, O_RDWR);
if (fd < 0)
pabort("can't open device");
@@ -415,13 +459,23 @@ int main(int argc, char *argv[])
/*
* spi mode
*/
+ /* WR is make a request to assign 'mode' */
+ request = mode;
ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
if (ret == -1)
pabort("can't set spi mode");
+ /* RD is read what mode the device actually is in */
ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
if (ret == -1)
pabort("can't get spi mode");
+ /* Drivers can reject some mode bits without returning an error.
+ * Read the current value to identify what mode it is in, and if it
+ * differs from the requested mode, warn the user.
+ */
+ if (request != mode)
+ printf("WARNING device does not support requested mode 0x%x\n",
+ request);
/*
* bits per word
@@ -446,11 +500,8 @@ int main(int argc, char *argv[])
pabort("can't get max speed hz");
printf("spi mode: 0x%x\n", mode);
- printf("bits per word: %d\n", bits);
- printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
-
- if (input_tx && input_file)
- pabort("only one of -p and --input may be selected");
+ printf("bits per word: %u\n", bits);
+ printf("max speed: %u Hz (%u kHz)\n", speed, speed/1000);
if (input_tx)
transfer_escaped_string(fd, input_tx);
generated by cgit (git 2.34.1) at 2025-12-22 13:40:30 +0000