Commit 7af475a5 authored by Joshua Clayton's avatar Joshua Clayton Committed by Mark Brown
Browse files

spi: spidev_test: accept input from a file 



Add input file support to facilitate testing larger data.

Signed-off-by: default avatarJoshua Clayton <stillcompiling@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 5c437a40

tools/spi/spidev_test.c

+47 −1
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <getopt.h>

#include <fcntl.h>

#include <sys/ioctl.h>

#include <sys/stat.h>

#include <linux/types.h>

#include <linux/spi/spidev.h>
@@ -33,6 +34,7 @@ static void pabort(const char *s) 
static const char *device = "/dev/spidev1.1";

static uint32_t mode;

static uint8_t bits = 8;

static char *input_file;

static uint32_t speed = 500000;

static uint16_t delay;

static int verbose;
@@ -144,6 +146,7 @@ static void print_usage(const char *prog) 
	     "  -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"

	     "  -l --loop     loopback\n"

	     "  -H --cpha     clock phase\n"

	     "  -O --cpol     clock polarity\n"
@@ -167,6 +170,7 @@ static void parse_opts(int argc, char *argv[]) 
			{ "speed",   1, 0, 's' },

			{ "delay",   1, 0, 'd' },

			{ "bpw",     1, 0, 'b' },

			{ "input",   1, 0, 'i' },

			{ "loop",    0, 0, 'l' },

			{ "cpha",    0, 0, 'H' },

			{ "cpol",    0, 0, 'O' },
@@ -182,7 +186,8 @@ static void parse_opts(int argc, char *argv[]) 
		};

		int c;



		c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24p:v", lopts, NULL);

		c = getopt_long(argc, argv, "D:s:d:b:i:lHOLC3NR24p:v",

				lopts, NULL);



		if (c == -1)

			break;
@@ -200,6 +205,9 @@ static void parse_opts(int argc, char *argv[]) 
		case 'b':

			bits = atoi(optarg);

			break;

		case 'i':

			input_file = optarg;

			break;

		case 'l':

			mode |= SPI_LOOP;

			break;
@@ -269,6 +277,39 @@ static void transfer_escaped_string(int fd, char *str) 
	free(tx);

}



static void transfer_file(int fd, char *filename)

{

	ssize_t bytes;

	struct stat sb;

	int tx_fd;

	uint8_t *tx;

	uint8_t *rx;



	if (stat(filename, &sb) == -1)

		pabort("can't stat input file");



	tx_fd = open(filename, O_RDONLY);

	if (fd < 0)

		pabort("can't open input file");



	tx = malloc(sb.st_size);

	if (!tx)

		pabort("can't allocate tx buffer");



	rx = malloc(sb.st_size);

	if (!rx)

		pabort("can't allocate rx buffer");



	bytes = read(tx_fd, tx, sb.st_size);

	if (bytes != sb.st_size)

		pabort("failed to read input file");



	transfer(fd, tx, rx, sb.st_size);

	free(rx);

	free(tx);

	close(tx_fd);

}



int main(int argc, char *argv[])

{

	int ret = 0;
@@ -317,8 +358,13 @@ int main(int argc, char *argv[]) 
	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");



	if (input_tx)

		transfer_escaped_string(fd, input_tx);

	else if (input_file)

		transfer_file(fd, input_file);

	else

		transfer(fd, default_tx, default_rx, sizeof(default_tx));