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Groups > linux.kernel > #1271313 > unrolled thread

[PATCH 0/8] spi: Add file i/o to spidev_test

Started byJoshua Clayton <stillcompiling@gmail.com>
First post2015-11-17 16:30 +0100
Last post2015-11-18 23:40 +0100
Articles 5 on this page of 25 — 3 participants

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Contents

  [PATCH 0/8] spi: Add file i/o to spidev_test Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 16:30 +0100
    [PATCH 8/8] spi: Move spi code from Documentation to tools Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 16:30 +0100
      Re: [PATCH 8/8] spi: Move spi code from Documentation to tools Mark Brown <broonie@kernel.org> - 2015-11-17 19:20 +0100
    [PATCH 5/8] Documentation/spi/spidev_test.c: check error Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 16:30 +0100
    [PATCH 3/8] Documentation/spi/spidev_test.c: accept input from a file Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 16:30 +0100
      Re: [PATCH 3/8] Documentation/spi/spidev_test.c: accept input from a  file Anton Bondarenko <anton.bondarenko.sama@gmail.com> - 2015-11-17 19:30 +0100
        Re: [PATCH 3/8] Documentation/spi/spidev_test.c: accept input from a  file Mark Brown <broonie@kernel.org> - 2015-11-17 19:50 +0100
        Re: [PATCH 3/8] Documentation/spi/spidev_test.c: accept input from a file Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 20:30 +0100
    [PATCH 7/8] tools/Makefile: minor whitespace cleanup Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 16:30 +0100
      Re: [PATCH 7/8] tools/Makefile: minor whitespace cleanup Mark Brown <broonie@kernel.org> - 2015-11-17 19:10 +0100
        Re: [PATCH 7/8] tools/Makefile: minor whitespace cleanup Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 20:50 +0100
    [PATCH 6/8] Documentation/spi/spidev_test.c: fix whitespace Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 16:30 +0100
    [PATCH 2/8] Documentation/spi/spidev_test.c: clean up input_tx Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 16:30 +0100
      Re: [PATCH 2/8] Documentation/spi/spidev_test.c: clean up input_tx Mark Brown <broonie@kernel.org> - 2015-11-17 18:50 +0100
        Re: [PATCH 2/8] Documentation/spi/spidev_test.c: clean up input_tx Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 20:30 +0100
          Re: [PATCH 2/8] Documentation/spi/spidev_test.c: clean up input_tx Mark Brown <broonie@kernel.org> - 2015-11-18 00:00 +0100
    Re: [PATCH 0/8] spi: Add file i/o to spidev_test Mark Brown <broonie@kernel.org> - 2015-11-17 16:40 +0100
      Re: [PATCH 0/8] spi: Add file i/o to spidev_test Joshua Clayton <stillcompiling@gmail.com> - 2015-11-17 17:20 +0100
        Re: [PATCH 0/8] spi: Add file i/o to spidev_test Mark Brown <broonie@kernel.org> - 2015-11-17 18:00 +0100
        [PATCH v2 0/6] spi: Add file i/o to spidev_test Joshua Clayton <stillcompiling@gmail.com> - 2015-11-18 23:40 +0100
          [PATCH v2 1/6] spi: Move spi code from Documentation to tools Joshua Clayton <stillcompiling@gmail.com> - 2015-11-18 23:40 +0100
          [PATCH v2 6/6] spi: spidev_test: fix whitespace Joshua Clayton <stillcompiling@gmail.com> - 2015-11-18 23:40 +0100
          [PATCH v2 5/6] spi: spidev_test: check error Joshua Clayton <stillcompiling@gmail.com> - 2015-11-18 23:40 +0100
          [PATCH v2 2/6] spi: spidev_test: transfer_escaped_string function Joshua Clayton <stillcompiling@gmail.com> - 2015-11-18 23:40 +0100
          [PATCH v2 4/6] spi: spidev_test: output to a file Joshua Clayton <stillcompiling@gmail.com> - 2015-11-18 23:40 +0100

Page 2 of 2 — ← Prev page 1 [2]

#1272633 — [PATCH v2 1/6] spi: Move spi code from Documentation to tools

FromJoshua Clayton <stillcompiling@gmail.com>
Date2015-11-18 23:40 +0100
Subject[PATCH v2 1/6] spi: Move spi code from Documentation to tools
Message-ID<qwjyp-RO-7@gated-at.bofh.it>
In reply to#1272632
Jon Corbet requested this code moved with the last changeset,
https://lkml.org/lkml/2015/3/1/144,
but the patch was not applied because it missed the Makefile.
Moved spidev_test, spidev_fdx and their Makefile infrastructure.

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
---
 Documentation/Makefile          |   2 +-
 Documentation/spi/Makefile      |   8 -
 Documentation/spi/spidev_fdx.c  | 158 --------------------
 Documentation/spi/spidev_test.c | 318 ----------------------------------------
 tools/Makefile                  |   7 +-
 tools/spi/Makefile              |   4 +
 tools/spi/spidev_fdx.c          | 158 ++++++++++++++++++++
 tools/spi/spidev_test.c         | 318 ++++++++++++++++++++++++++++++++++++++++
 8 files changed, 485 insertions(+), 488 deletions(-)
 delete mode 100644 Documentation/spi/Makefile
 delete mode 100644 Documentation/spi/spidev_fdx.c
 delete mode 100644 Documentation/spi/spidev_test.c
 create mode 100644 tools/spi/Makefile
 create mode 100644 tools/spi/spidev_fdx.c
 create mode 100644 tools/spi/spidev_test.c

diff --git a/Documentation/Makefile b/Documentation/Makefile
index 6883a1b..f642cb9 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,4 +1,4 @@
 subdir-y := accounting arm auxdisplay blackfin connector \
 	filesystems filesystems ia64 laptops mic misc-devices \
-	networking pcmcia prctl ptp spi timers vDSO video4linux \
+	networking pcmcia prctl ptp timers vDSO video4linux \
 	watchdog
diff --git a/Documentation/spi/Makefile b/Documentation/spi/Makefile
deleted file mode 100644
index efa2558..0000000
--- a/Documentation/spi/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# List of programs to build
-hostprogs-y := spidev_test spidev_fdx
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
-
-HOSTCFLAGS_spidev_test.o += -I$(objtree)/usr/include
-HOSTCFLAGS_spidev_fdx.o += -I$(objtree)/usr/include
diff --git a/Documentation/spi/spidev_fdx.c b/Documentation/spi/spidev_fdx.c
deleted file mode 100644
index 0ea3e51..0000000
--- a/Documentation/spi/spidev_fdx.c
+++ /dev/null
@@ -1,158 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <string.h>
-
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#include <linux/types.h>
-#include <linux/spi/spidev.h>
-
-
-static int verbose;
-
-static void do_read(int fd, int len)
-{
-	unsigned char	buf[32], *bp;
-	int		status;
-
-	/* read at least 2 bytes, no more than 32 */
-	if (len < 2)
-		len = 2;
-	else if (len > sizeof(buf))
-		len = sizeof(buf);
-	memset(buf, 0, sizeof buf);
-
-	status = read(fd, buf, len);
-	if (status < 0) {
-		perror("read");
-		return;
-	}
-	if (status != len) {
-		fprintf(stderr, "short read\n");
-		return;
-	}
-
-	printf("read(%2d, %2d): %02x %02x,", len, status,
-		buf[0], buf[1]);
-	status -= 2;
-	bp = buf + 2;
-	while (status-- > 0)
-		printf(" %02x", *bp++);
-	printf("\n");
-}
-
-static void do_msg(int fd, int len)
-{
-	struct spi_ioc_transfer	xfer[2];
-	unsigned char		buf[32], *bp;
-	int			status;
-
-	memset(xfer, 0, sizeof xfer);
-	memset(buf, 0, sizeof buf);
-
-	if (len > sizeof buf)
-		len = sizeof buf;
-
-	buf[0] = 0xaa;
-	xfer[0].tx_buf = (unsigned long)buf;
-	xfer[0].len = 1;
-
-	xfer[1].rx_buf = (unsigned long) buf;
-	xfer[1].len = len;
-
-	status = ioctl(fd, SPI_IOC_MESSAGE(2), xfer);
-	if (status < 0) {
-		perror("SPI_IOC_MESSAGE");
-		return;
-	}
-
-	printf("response(%2d, %2d): ", len, status);
-	for (bp = buf; len; len--)
-		printf(" %02x", *bp++);
-	printf("\n");
-}
-
-static void dumpstat(const char *name, int fd)
-{
-	__u8	lsb, bits;
-	__u32	mode, speed;
-
-	if (ioctl(fd, SPI_IOC_RD_MODE32, &mode) < 0) {
-		perror("SPI rd_mode");
-		return;
-	}
-	if (ioctl(fd, SPI_IOC_RD_LSB_FIRST, &lsb) < 0) {
-		perror("SPI rd_lsb_fist");
-		return;
-	}
-	if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) < 0) {
-		perror("SPI bits_per_word");
-		return;
-	}
-	if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) < 0) {
-		perror("SPI max_speed_hz");
-		return;
-	}
-
-	printf("%s: spi mode 0x%x, %d bits %sper word, %d Hz max\n",
-		name, mode, bits, lsb ? "(lsb first) " : "", speed);
-}
-
-int main(int argc, char **argv)
-{
-	int		c;
-	int		readcount = 0;
-	int		msglen = 0;
-	int		fd;
-	const char	*name;
-
-	while ((c = getopt(argc, argv, "hm:r:v")) != EOF) {
-		switch (c) {
-		case 'm':
-			msglen = atoi(optarg);
-			if (msglen < 0)
-				goto usage;
-			continue;
-		case 'r':
-			readcount = atoi(optarg);
-			if (readcount < 0)
-				goto usage;
-			continue;
-		case 'v':
-			verbose++;
-			continue;
-		case 'h':
-		case '?':
-usage:
-			fprintf(stderr,
-				"usage: %s [-h] [-m N] [-r N] /dev/spidevB.D\n",
-				argv[0]);
-			return 1;
-		}
-	}
-
-	if ((optind + 1) != argc)
-		goto usage;
-	name = argv[optind];
-
-	fd = open(name, O_RDWR);
-	if (fd < 0) {
-		perror("open");
-		return 1;
-	}
-
-	dumpstat(name, fd);
-
-	if (msglen)
-		do_msg(fd, msglen);
-
-	if (readcount)
-		do_read(fd, readcount);
-
-	close(fd);
-	return 0;
-}
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
deleted file mode 100644
index 135b3f5..0000000
--- a/Documentation/spi/spidev_test.c
+++ /dev/null
@@ -1,318 +0,0 @@
-/*
- * 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
- */
-
-#include <stdint.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <getopt.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <linux/types.h>
-#include <linux/spi/spidev.h>
-
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
-
-static void pabort(const char *s)
-{
-	perror(s);
-	abort();
-}
-
-static const char *device = "/dev/spidev1.1";
-static uint32_t mode;
-static uint8_t bits = 8;
-static uint32_t speed = 500000;
-static uint16_t delay;
-static int verbose;
-
-uint8_t default_tx[] = {
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-	0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-	0xF0, 0x0D,
-};
-
-uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };
-char *input_tx;
-
-static void hex_dump(const void *src, size_t length, size_t line_size, char *prefix)
-{
-	int i = 0;
-	const unsigned char *address = src;
-	const unsigned char *line = address;
-	unsigned char c;
-
-	printf("%s | ", prefix);
-	while (length-- > 0) {
-		printf("%02X ", *address++);
-		if (!(++i % line_size) || (length == 0 && i % line_size)) {
-			if (length == 0) {
-				while (i++ % line_size)
-					printf("__ ");
-			}
-			printf(" | ");  /* right close */
-			while (line < address) {
-				c = *line++;
-				printf("%c", (c < 33 || c == 255) ? 0x2E : c);
-			}
-			printf("\n");
-			if (length > 0)
-				printf("%s | ", prefix);
-		}
-	}
-}
-
-/*
- *  Unescape - process hexadecimal escape character
- *      converts shell input "\x23" -> 0x23
- */
-static int unescape(char *_dst, char *_src, size_t len)
-{
-	int ret = 0;
-	char *src = _src;
-	char *dst = _dst;
-	unsigned int ch;
-
-	while (*src) {
-		if (*src == '\\' && *(src+1) == 'x') {
-			sscanf(src + 2, "%2x", &ch);
-			src += 4;
-			*dst++ = (unsigned char)ch;
-		} else {
-			*dst++ = *src++;
-		}
-		ret++;
-	}
-	return ret;
-}
-
-static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
-{
-	int ret;
-
-	struct spi_ioc_transfer tr = {
-		.tx_buf = (unsigned long)tx,
-		.rx_buf = (unsigned long)rx,
-		.len = len,
-		.delay_usecs = delay,
-		.speed_hz = speed,
-		.bits_per_word = bits,
-	};
-
-	if (mode & SPI_TX_QUAD)
-		tr.tx_nbits = 4;
-	else if (mode & SPI_TX_DUAL)
-		tr.tx_nbits = 2;
-	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))
-			tr.rx_buf = 0;
-		else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL))
-			tr.tx_buf = 0;
-	}
-
-	ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
-	if (ret < 1)
-		pabort("can't send spi message");
-
-	if (verbose)
-		hex_dump(tx, len, 32, "TX");
-	hex_dump(rx, len, 32, "RX");
-}
-
-static void print_usage(const char *prog)
-{
-	printf("Usage: %s [-DsbdlHOLC3]\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"
-	     "  -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");
-	exit(1);
-}
-
-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' },
-			{ "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' },
-			{ NULL, 0, 0, 0 },
-		};
-		int c;
-
-		c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24p:v", lopts, NULL);
-
-		if (c == -1)
-			break;
-
-		switch (c) {
-		case 'D':
-			device = optarg;
-			break;
-		case 's':
-			speed = atoi(optarg);
-			break;
-		case 'd':
-			delay = atoi(optarg);
-			break;
-		case 'b':
-			bits = atoi(optarg);
-			break;
-		case 'l':
-			mode |= SPI_LOOP;
-			break;
-		case 'H':
-			mode |= SPI_CPHA;
-			break;
-		case 'O':
-			mode |= SPI_CPOL;
-			break;
-		case 'L':
-			mode |= SPI_LSB_FIRST;
-			break;
-		case 'C':
-			mode |= SPI_CS_HIGH;
-			break;
-		case '3':
-			mode |= SPI_3WIRE;
-			break;
-		case 'N':
-			mode |= SPI_NO_CS;
-			break;
-		case 'v':
-			verbose = 1;
-			break;
-		case 'R':
-			mode |= SPI_READY;
-			break;
-		case 'p':
-			input_tx = optarg;
-			break;
-		case '2':
-			mode |= SPI_TX_DUAL;
-			break;
-		case '4':
-			mode |= SPI_TX_QUAD;
-			break;
-		default:
-			print_usage(argv[0]);
-			break;
-		}
-	}
-	if (mode & SPI_LOOP) {
-		if (mode & SPI_TX_DUAL)
-			mode |= SPI_RX_DUAL;
-		if (mode & SPI_TX_QUAD)
-			mode |= SPI_RX_QUAD;
-	}
-}
-
-int main(int argc, char *argv[])
-{
-	int ret = 0;
-	int fd;
-	uint8_t *tx;
-	uint8_t *rx;
-	int size;
-
-	parse_opts(argc, argv);
-
-	fd = open(device, O_RDWR);
-	if (fd < 0)
-		pabort("can't open device");
-
-	/*
-	 * spi mode
-	 */
-	ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
-	if (ret == -1)
-		pabort("can't set spi mode");
-
-	ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
-	if (ret == -1)
-		pabort("can't get spi mode");
-
-	/*
-	 * bits per word
-	 */
-	ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
-	if (ret == -1)
-		pabort("can't set bits per word");
-
-	ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
-	if (ret == -1)
-		pabort("can't get bits per word");
-
-	/*
-	 * max speed hz
-	 */
-	ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
-	if (ret == -1)
-		pabort("can't set max speed hz");
-
-	ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
-	if (ret == -1)
-		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) {
-		size = strlen(input_tx+1);
-		tx = malloc(size);
-		rx = malloc(size);
-		size = unescape((char *)tx, input_tx, size);
-		transfer(fd, tx, rx, size);
-		free(rx);
-		free(tx);
-	} else {
-		transfer(fd, default_tx, default_rx, sizeof(default_tx));
-	}
-
-	close(fd);
-
-	return ret;
-}
diff --git a/tools/Makefile b/tools/Makefile
index 9a617ad..d238a96 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -11,6 +11,7 @@ help:
 	@echo '  lguest     - a minimal 32-bit x86 hypervisor'
 	@echo '  perf       - Linux performance measurement and analysis tool'
 	@echo '  selftests  - various kernel selftests'
+	@echo '  spi        - spi tools'
 	@echo '  turbostat  - Intel CPU idle stats and freq reporting tool'
 	@echo '  usb        - USB testing tools'
 	@echo '  virtio     - vhost test module'
@@ -41,7 +42,7 @@ acpi: FORCE
 cpupower: FORCE
 	$(call descend,power/$@)
 
-cgroup firewire hv guest usb virtio vm net: FORCE
+cgroup firewire hv guest spi usb virtio vm net: FORCE
 	$(call descend,$@)
 
 liblockdep: FORCE
@@ -91,7 +92,7 @@ acpi_clean:
 cpupower_clean:
 	$(call descend,power/cpupower,clean)
 
-cgroup_clean hv_clean firewire_clean lguest_clean usb_clean virtio_clean vm_clean net_clean:
+cgroup_clean hv_clean firewire_clean lguest_clean spi_clean usb_clean virtio_clean vm_clean net_clean:
 	$(call descend,$(@:_clean=),clean)
 
 liblockdep_clean:
@@ -113,7 +114,7 @@ tmon_clean:
 	$(call descend,thermal/tmon,clean)
 
 clean: acpi_clean cgroup_clean cpupower_clean hv_clean firewire_clean lguest_clean \
-		perf_clean selftests_clean turbostat_clean usb_clean virtio_clean \
+		perf_clean selftests_clean spi_clean turbostat_clean usb_clean virtio_clean \
 		vm_clean net_clean x86_energy_perf_policy_clean tmon_clean
 
 .PHONY: FORCE
diff --git a/tools/spi/Makefile b/tools/spi/Makefile
new file mode 100644
index 0000000..cd0db62
--- /dev/null
+++ b/tools/spi/Makefile
@@ -0,0 +1,4 @@
+all: spidev_test spidev_fdx
+
+clean:
+	$(RM) spidev_test spidev_fdx
diff --git a/tools/spi/spidev_fdx.c b/tools/spi/spidev_fdx.c
new file mode 100644
index 0000000..0ea3e51
--- /dev/null
+++ b/tools/spi/spidev_fdx.c
@@ -0,0 +1,158 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <linux/types.h>
+#include <linux/spi/spidev.h>
+
+
+static int verbose;
+
+static void do_read(int fd, int len)
+{
+	unsigned char	buf[32], *bp;
+	int		status;
+
+	/* read at least 2 bytes, no more than 32 */
+	if (len < 2)
+		len = 2;
+	else if (len > sizeof(buf))
+		len = sizeof(buf);
+	memset(buf, 0, sizeof buf);
+
+	status = read(fd, buf, len);
+	if (status < 0) {
+		perror("read");
+		return;
+	}
+	if (status != len) {
+		fprintf(stderr, "short read\n");
+		return;
+	}
+
+	printf("read(%2d, %2d): %02x %02x,", len, status,
+		buf[0], buf[1]);
+	status -= 2;
+	bp = buf + 2;
+	while (status-- > 0)
+		printf(" %02x", *bp++);
+	printf("\n");
+}
+
+static void do_msg(int fd, int len)
+{
+	struct spi_ioc_transfer	xfer[2];
+	unsigned char		buf[32], *bp;
+	int			status;
+
+	memset(xfer, 0, sizeof xfer);
+	memset(buf, 0, sizeof buf);
+
+	if (len > sizeof buf)
+		len = sizeof buf;
+
+	buf[0] = 0xaa;
+	xfer[0].tx_buf = (unsigned long)buf;
+	xfer[0].len = 1;
+
+	xfer[1].rx_buf = (unsigned long) buf;
+	xfer[1].len = len;
+
+	status = ioctl(fd, SPI_IOC_MESSAGE(2), xfer);
+	if (status < 0) {
+		perror("SPI_IOC_MESSAGE");
+		return;
+	}
+
+	printf("response(%2d, %2d): ", len, status);
+	for (bp = buf; len; len--)
+		printf(" %02x", *bp++);
+	printf("\n");
+}
+
+static void dumpstat(const char *name, int fd)
+{
+	__u8	lsb, bits;
+	__u32	mode, speed;
+
+	if (ioctl(fd, SPI_IOC_RD_MODE32, &mode) < 0) {
+		perror("SPI rd_mode");
+		return;
+	}
+	if (ioctl(fd, SPI_IOC_RD_LSB_FIRST, &lsb) < 0) {
+		perror("SPI rd_lsb_fist");
+		return;
+	}
+	if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) < 0) {
+		perror("SPI bits_per_word");
+		return;
+	}
+	if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) < 0) {
+		perror("SPI max_speed_hz");
+		return;
+	}
+
+	printf("%s: spi mode 0x%x, %d bits %sper word, %d Hz max\n",
+		name, mode, bits, lsb ? "(lsb first) " : "", speed);
+}
+
+int main(int argc, char **argv)
+{
+	int		c;
+	int		readcount = 0;
+	int		msglen = 0;
+	int		fd;
+	const char	*name;
+
+	while ((c = getopt(argc, argv, "hm:r:v")) != EOF) {
+		switch (c) {
+		case 'm':
+			msglen = atoi(optarg);
+			if (msglen < 0)
+				goto usage;
+			continue;
+		case 'r':
+			readcount = atoi(optarg);
+			if (readcount < 0)
+				goto usage;
+			continue;
+		case 'v':
+			verbose++;
+			continue;
+		case 'h':
+		case '?':
+usage:
+			fprintf(stderr,
+				"usage: %s [-h] [-m N] [-r N] /dev/spidevB.D\n",
+				argv[0]);
+			return 1;
+		}
+	}
+
+	if ((optind + 1) != argc)
+		goto usage;
+	name = argv[optind];
+
+	fd = open(name, O_RDWR);
+	if (fd < 0) {
+		perror("open");
+		return 1;
+	}
+
+	dumpstat(name, fd);
+
+	if (msglen)
+		do_msg(fd, msglen);
+
+	if (readcount)
+		do_read(fd, readcount);
+
+	close(fd);
+	return 0;
+}
diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
new file mode 100644
index 0000000..135b3f5
--- /dev/null
+++ b/tools/spi/spidev_test.c
@@ -0,0 +1,318 @@
+/*
+ * 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
+ */
+
+#include <stdint.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/types.h>
+#include <linux/spi/spidev.h>
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+
+static void pabort(const char *s)
+{
+	perror(s);
+	abort();
+}
+
+static const char *device = "/dev/spidev1.1";
+static uint32_t mode;
+static uint8_t bits = 8;
+static uint32_t speed = 500000;
+static uint16_t delay;
+static int verbose;
+
+uint8_t default_tx[] = {
+	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+	0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
+	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+	0xF0, 0x0D,
+};
+
+uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };
+char *input_tx;
+
+static void hex_dump(const void *src, size_t length, size_t line_size, char *prefix)
+{
+	int i = 0;
+	const unsigned char *address = src;
+	const unsigned char *line = address;
+	unsigned char c;
+
+	printf("%s | ", prefix);
+	while (length-- > 0) {
+		printf("%02X ", *address++);
+		if (!(++i % line_size) || (length == 0 && i % line_size)) {
+			if (length == 0) {
+				while (i++ % line_size)
+					printf("__ ");
+			}
+			printf(" | ");  /* right close */
+			while (line < address) {
+				c = *line++;
+				printf("%c", (c < 33 || c == 255) ? 0x2E : c);
+			}
+			printf("\n");
+			if (length > 0)
+				printf("%s | ", prefix);
+		}
+	}
+}
+
+/*
+ *  Unescape - process hexadecimal escape character
+ *      converts shell input "\x23" -> 0x23
+ */
+static int unescape(char *_dst, char *_src, size_t len)
+{
+	int ret = 0;
+	char *src = _src;
+	char *dst = _dst;
+	unsigned int ch;
+
+	while (*src) {
+		if (*src == '\\' && *(src+1) == 'x') {
+			sscanf(src + 2, "%2x", &ch);
+			src += 4;
+			*dst++ = (unsigned char)ch;
+		} else {
+			*dst++ = *src++;
+		}
+		ret++;
+	}
+	return ret;
+}
+
+static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
+{
+	int ret;
+
+	struct spi_ioc_transfer tr = {
+		.tx_buf = (unsigned long)tx,
+		.rx_buf = (unsigned long)rx,
+		.len = len,
+		.delay_usecs = delay,
+		.speed_hz = speed,
+		.bits_per_word = bits,
+	};
+
+	if (mode & SPI_TX_QUAD)
+		tr.tx_nbits = 4;
+	else if (mode & SPI_TX_DUAL)
+		tr.tx_nbits = 2;
+	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))
+			tr.rx_buf = 0;
+		else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL))
+			tr.tx_buf = 0;
+	}
+
+	ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
+	if (ret < 1)
+		pabort("can't send spi message");
+
+	if (verbose)
+		hex_dump(tx, len, 32, "TX");
+	hex_dump(rx, len, 32, "RX");
+}
+
+static void print_usage(const char *prog)
+{
+	printf("Usage: %s [-DsbdlHOLC3]\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"
+	     "  -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");
+	exit(1);
+}
+
+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' },
+			{ "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' },
+			{ NULL, 0, 0, 0 },
+		};
+		int c;
+
+		c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24p:v", lopts, NULL);
+
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'D':
+			device = optarg;
+			break;
+		case 's':
+			speed = atoi(optarg);
+			break;
+		case 'd':
+			delay = atoi(optarg);
+			break;
+		case 'b':
+			bits = atoi(optarg);
+			break;
+		case 'l':
+			mode |= SPI_LOOP;
+			break;
+		case 'H':
+			mode |= SPI_CPHA;
+			break;
+		case 'O':
+			mode |= SPI_CPOL;
+			break;
+		case 'L':
+			mode |= SPI_LSB_FIRST;
+			break;
+		case 'C':
+			mode |= SPI_CS_HIGH;
+			break;
+		case '3':
+			mode |= SPI_3WIRE;
+			break;
+		case 'N':
+			mode |= SPI_NO_CS;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		case 'R':
+			mode |= SPI_READY;
+			break;
+		case 'p':
+			input_tx = optarg;
+			break;
+		case '2':
+			mode |= SPI_TX_DUAL;
+			break;
+		case '4':
+			mode |= SPI_TX_QUAD;
+			break;
+		default:
+			print_usage(argv[0]);
+			break;
+		}
+	}
+	if (mode & SPI_LOOP) {
+		if (mode & SPI_TX_DUAL)
+			mode |= SPI_RX_DUAL;
+		if (mode & SPI_TX_QUAD)
+			mode |= SPI_RX_QUAD;
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	int ret = 0;
+	int fd;
+	uint8_t *tx;
+	uint8_t *rx;
+	int size;
+
+	parse_opts(argc, argv);
+
+	fd = open(device, O_RDWR);
+	if (fd < 0)
+		pabort("can't open device");
+
+	/*
+	 * spi mode
+	 */
+	ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
+	if (ret == -1)
+		pabort("can't set spi mode");
+
+	ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
+	if (ret == -1)
+		pabort("can't get spi mode");
+
+	/*
+	 * bits per word
+	 */
+	ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
+	if (ret == -1)
+		pabort("can't set bits per word");
+
+	ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
+	if (ret == -1)
+		pabort("can't get bits per word");
+
+	/*
+	 * max speed hz
+	 */
+	ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
+	if (ret == -1)
+		pabort("can't set max speed hz");
+
+	ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
+	if (ret == -1)
+		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) {
+		size = strlen(input_tx+1);
+		tx = malloc(size);
+		rx = malloc(size);
+		size = unescape((char *)tx, input_tx, size);
+		transfer(fd, tx, rx, size);
+		free(rx);
+		free(tx);
+	} else {
+		transfer(fd, default_tx, default_rx, sizeof(default_tx));
+	}
+
+	close(fd);
+
+	return ret;
+}
-- 
2.5.0

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#1272638 — [PATCH v2 6/6] spi: spidev_test: fix whitespace

FromJoshua Clayton <stillcompiling@gmail.com>
Date2015-11-18 23:40 +0100
Subject[PATCH v2 6/6] spi: spidev_test: fix whitespace
Message-ID<qwjyq-RO-27@gated-at.bofh.it>
In reply to#1272632
Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
---
 tools/spi/spidev_test.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 322370d..eddfc33 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -52,7 +52,8 @@ uint8_t default_tx[] = {
 uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };
 char *input_tx;
 
-static void hex_dump(const void *src, size_t length, size_t line_size, char *prefix)
+static void hex_dump(const void *src, size_t length, size_t line_size,
+		     char *prefix)
 {
 	int i = 0;
 	const unsigned char *address = src;
@@ -164,7 +165,7 @@ static void print_usage(const char *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"
+	     "  -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"
-- 
2.5.0

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#1272639 — [PATCH v2 5/6] spi: spidev_test: check error

FromJoshua Clayton <stillcompiling@gmail.com>
Date2015-11-18 23:40 +0100
Subject[PATCH v2 5/6] spi: spidev_test: check error
Message-ID<qwjyq-RO-23@gated-at.bofh.it>
In reply to#1272632
Check the result of sscanf to verify a result was found.
report and error and abort if pattern was not found.

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
---
 tools/spi/spidev_test.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 02fc3a4..322370d 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -86,13 +86,17 @@ static void hex_dump(const void *src, size_t length, size_t line_size, char *pre
 static int unescape(char *_dst, char *_src, size_t len)
 {
 	int ret = 0;
+	int match;
 	char *src = _src;
 	char *dst = _dst;
 	unsigned int ch;
 
 	while (*src) {
 		if (*src == '\\' && *(src+1) == 'x') {
-			sscanf(src + 2, "%2x", &ch);
+			match = sscanf(src + 2, "%2x", &ch);
+			if (!match)
+				pabort("malformed input string");
+
 			src += 4;
 			*dst++ = (unsigned char)ch;
 		} else {
-- 
2.5.0

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#1272641 — [PATCH v2 2/6] spi: spidev_test: transfer_escaped_string function

FromJoshua Clayton <stillcompiling@gmail.com>
Date2015-11-18 23:40 +0100
Subject[PATCH v2 2/6] spi: spidev_test: transfer_escaped_string function
Message-ID<qwjyq-RO-19@gated-at.bofh.it>
In reply to#1272632
Move the input_tx code into its own small function.
This cleans up some variables from main() that are used only here.
While we are at it, check malloc calls instead of assuming they succeed.

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
---
 tools/spi/spidev_test.c | 36 +++++++++++++++++++++++-------------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 135b3f5..f9d2957 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -249,13 +249,30 @@ static void parse_opts(int argc, char *argv[])
 	}
 }
 
+static void transfer_escaped_string(int fd, char *str)
+{
+	size_t size = strlen(str + 1);
+	uint8_t *tx;
+	uint8_t *rx;
+
+	tx = malloc(size);
+	if (!tx)
+		pabort("can't allocate tx buffer");
+
+	rx = malloc(size);
+	if (!rx)
+		pabort("can't allocate rx buffer");
+
+	size = unescape((char *)tx, str, size);
+	transfer(fd, tx, rx, size);
+	free(rx);
+	free(tx);
+}
+
 int main(int argc, char *argv[])
 {
 	int ret = 0;
 	int fd;
-	uint8_t *tx;
-	uint8_t *rx;
-	int size;
 
 	parse_opts(argc, argv);
 
@@ -300,17 +317,10 @@ 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) {
-		size = strlen(input_tx+1);
-		tx = malloc(size);
-		rx = malloc(size);
-		size = unescape((char *)tx, input_tx, size);
-		transfer(fd, tx, rx, size);
-		free(rx);
-		free(tx);
-	} else {
+	if (input_tx)
+		transfer_escaped_string(fd, input_tx);
+	else
 		transfer(fd, default_tx, default_rx, sizeof(default_tx));
-	}
 
 	close(fd);
 
-- 
2.5.0

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#1272642 — [PATCH v2 4/6] spi: spidev_test: output to a file

FromJoshua Clayton <stillcompiling@gmail.com>
Date2015-11-18 23:40 +0100
Subject[PATCH v2 4/6] spi: spidev_test: output to a file
Message-ID<qwjyq-RO-31@gated-at.bofh.it>
In reply to#1272632
For testing of larger data transfers, output unmodified data
directly to a file.

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
---
 tools/spi/spidev_test.c | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 71a45a4..02fc3a4 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -35,6 +35,7 @@ static const char *device = "/dev/spidev1.1";
 static uint32_t mode;
 static uint8_t bits = 8;
 static char *input_file;
+static char *output_file;
 static uint32_t speed = 500000;
 static uint16_t delay;
 static int verbose;
@@ -105,7 +106,7 @@ static int unescape(char *_dst, char *_src, size_t len)
 static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
 {
 	int ret;
-
+	int out_fd;
 	struct spi_ioc_transfer tr = {
 		.tx_buf = (unsigned long)tx,
 		.rx_buf = (unsigned long)rx,
@@ -136,7 +137,21 @@ static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
 
 	if (verbose)
 		hex_dump(tx, len, 32, "TX");
-	hex_dump(rx, len, 32, "RX");
+
+	if (output_file) {
+		out_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+		if (out_fd < 0)
+			pabort("could not open output file");
+
+		ret = write(out_fd, rx, len);
+		if (ret != len)
+			pabort("not all bytes written to utput file");
+
+		close(out_fd);
+	}
+
+	if (verbose || !output_file)
+		hex_dump(rx, len, 32, "RX");
 }
 
 static void print_usage(const char *prog)
@@ -147,6 +162,7 @@ static void print_usage(const char *prog)
 	     "  -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"
@@ -171,6 +187,7 @@ static void parse_opts(int argc, char *argv[])
 			{ "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' },
@@ -186,7 +203,7 @@ static void parse_opts(int argc, char *argv[])
 		};
 		int c;
 
-		c = getopt_long(argc, argv, "D:s:d:b:i:lHOLC3NR24p:v",
+		c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR24p:v",
 				lopts, NULL);
 
 		if (c == -1)
@@ -208,6 +225,9 @@ static void parse_opts(int argc, char *argv[])
 		case 'i':
 			input_file = optarg;
 			break;
+		case 'o':
+			output_file = optarg;
+			break;
 		case 'l':
 			mode |= SPI_LOOP;
 			break;
-- 
2.5.0

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