Add to spidev_test, the ability to read from and write to a file.
Clean up code along the way.
As I finished, I found that a request has been made to move
spidev_test from Documentation to tools, so I did that as well.
Joshua Clayton (8):
Documentation/spi/spidev_test.c: use one rx buffer
Documentation/spi/spidev_test.c: clean up input_tx
Documentation/spi/spidev_test.c: accept input from a file
Documentation/spi/spidev_test.c: output to a file
Documentation/spi/spidev_test.c: check error
Documentation/spi/spidev_test.c: fix whitespace
tools/Makefile: minor whitespace cleanup
spi: Move spi code from Documentation to tools
Documentation/Makefile | 2 +-
Documentation/spi/Makefile | 8 -
Documentation/spi/spidev_fdx.c | 158 -----------------
Documentation/spi/spidev_test.c | 318 ---------------------------------
tools/Makefile | 43 ++++-
tools/spi/Makefile | 4 +
tools/spi/spidev_fdx.c | 158 +++++++++++++++++
tools/spi/spidev_test.c | 385 ++++++++++++++++++++++++++++++++++++++++
8 files changed, 582 insertions(+), 494 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
--
2.5.0
default_rx and rx are needlessly different.
Use one buffer, local to transmit()
Signed-off-by: Joshua Clayton <[email protected]>
---
Documentation/spi/spidev_test.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 135b3f5..dfe8f47 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -46,7 +46,6 @@ uint8_t default_tx[] = {
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)
@@ -100,10 +99,10 @@ static int unescape(char *_dst, char *_src, size_t len)
return ret;
}
-static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
+static void transfer(int fd, uint8_t const *tx, size_t len)
{
int ret;
-
+ uint8_t *rx = malloc(len);
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
@@ -135,6 +134,7 @@ 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");
+ free(rx);
}
static void print_usage(const char *prog)
@@ -254,7 +254,6 @@ int main(int argc, char *argv[])
int ret = 0;
int fd;
uint8_t *tx;
- uint8_t *rx;
int size;
parse_opts(argc, argv);
@@ -303,13 +302,11 @@ int main(int argc, char *argv[])
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);
+ transfer(fd, tx, size);
free(tx);
} else {
- transfer(fd, default_tx, default_rx, sizeof(default_tx));
+ transfer(fd, default_tx, sizeof(default_tx));
}
close(fd);
--
2.5.0
Put input from string into its own function.
Signed-off-by: Joshua Clayton <[email protected]>
---
Documentation/spi/spidev_test.c | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index dfe8f47..1ed9110 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -249,12 +249,20 @@ 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 = malloc(size);
+
+ size = unescape((char *)tx, str, size);
+ transfer(fd, tx, size);
+ free(tx);
+}
+
int main(int argc, char *argv[])
{
int ret = 0;
int fd;
- uint8_t *tx;
- int size;
parse_opts(argc, argv);
@@ -299,15 +307,10 @@ 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);
- size = unescape((char *)tx, input_tx, size);
- transfer(fd, tx, size);
- free(tx);
- } else {
+ if (input_tx)
+ transfer_escaped_string(fd, input_tx);
+ else
transfer(fd, default_tx, sizeof(default_tx));
- }
close(fd);
--
2.5.0
Add input file support to facilitate testing larger data.
Signed-off-by: Joshua Clayton <[email protected]>
---
Documentation/spi/spidev_test.c | 42 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 1ed9110..ef812ad 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -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;
@@ -259,6 +267,33 @@ 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;
+
+ if (stat(filename, &sb) == -1)
+ pabort("can't stat input file");
+
+ if (sb.st_size > 4096)
+ pabort("input file exceeds spidev's 4k limit");
+
+ tx_fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ pabort("can't open input file");
+
+ tx = malloc(sb.st_size);
+ bytes = read(tx_fd, tx, sb.st_size);
+ if (bytes != sb.st_size)
+ pabort("failed to read input file");
+
+ transfer(fd, tx, sb.st_size);
+ free(tx);
+ close(tx_fd);
+}
+
int main(int argc, char *argv[])
{
int ret = 0;
@@ -307,8 +342,13 @@ 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, sizeof(default_tx));
--
2.5.0
For testing of larger data transfers, output unmodified data
directly to a file.
Signed-off-by: Joshua Clayton <[email protected]>
---
Documentation/spi/spidev_test.c | 26 ++++++++++++++++++++++++--
1 file changed, 24 insertions(+), 2 deletions(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index ef812ad..273f667 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/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;
@@ -104,6 +105,7 @@ static int unescape(char *_dst, char *_src, size_t len)
static void transfer(int fd, uint8_t const *tx, size_t len)
{
int ret;
+ int out_fd;
uint8_t *rx = malloc(len);
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
@@ -135,7 +137,22 @@ static void transfer(int fd, uint8_t const *tx, 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");
+
free(rx);
}
@@ -147,6 +164,7 @@ 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 +189,7 @@ 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 +205,7 @@ 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 +227,9 @@ 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
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 <[email protected]>
---
Documentation/spi/spidev_test.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 273f667..2ff5fe8 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -85,13 +85,17 @@ 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
Signed-off-by: Joshua Clayton <[email protected]>
---
Documentation/spi/spidev_test.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 2ff5fe8..bf6070c 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -51,7 +51,8 @@ uint8_t default_tx[] = {
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;
@@ -166,7 +167,7 @@ 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
Signed-off-by: Joshua Clayton <[email protected]>
---
tools/Makefile | 37 ++++++++++++++++++++++++++++++-------
1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/tools/Makefile b/tools/Makefile
index 9a617ad..428fb4d 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -80,10 +80,21 @@ turbostat_install x86_energy_perf_policy_install:
tmon_install:
$(call descend,thermal/$(@:_install=),install)
-install: acpi_install cgroup_install cpupower_install hv_install firewire_install lguest_install \
- perf_install selftests_install turbostat_install usb_install \
- virtio_install vm_install net_install x86_energy_perf_policy_install \
- tmon
+install: acpi_install \
+ cgroup_install \
+ cpupower_install \
+ hv_install \
+ firewire_install \
+ lguest_install \
+ perf_install \
+ selftests_install \
+ tmon \
+ turbostat_install \
+ usb_install \
+ virtio_install \
+ vm_install \
+ net_install \
+ x86_energy_perf_policy_install
acpi_clean:
$(call descend,power/acpi,clean)
@@ -112,8 +123,20 @@ turbostat_clean x86_energy_perf_policy_clean:
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 \
- vm_clean net_clean x86_energy_perf_policy_clean tmon_clean
+clean: acpi_clean \
+ cgroup_clean \
+ cpupower_clean \
+ hv_clean \
+ firewire_clean \
+ lguest_clean \
+ perf_clean \
+ selftests_clean \
+ tmon_clean \
+ turbostat_clean \
+ usb_clean \
+ virtio_clean \
+ vm_clean \
+ net_clean \
+ x86_energy_perf_policy_clean
.PHONY: FORCE
--
2.5.0
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 <[email protected]>
---
Documentation/Makefile | 2 +-
Documentation/spi/Makefile | 8 -
Documentation/spi/spidev_fdx.c | 158 -----------------
Documentation/spi/spidev_test.c | 385 ----------------------------------------
tools/Makefile | 6 +-
tools/spi/Makefile | 4 +
tools/spi/spidev_fdx.c | 158 +++++++++++++++++
tools/spi/spidev_test.c | 385 ++++++++++++++++++++++++++++++++++++++++
8 files changed, 552 insertions(+), 554 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 bf6070c..0000000
--- a/Documentation/spi/spidev_test.c
+++ /dev/null
@@ -1,385 +0,0 @@
-/*
- * SPI testing utility (using spidev driver)
- *
- * Copyright (c) 2007 MontaVista Software, Inc.
- * Copyright (c) 2007 Anton Vorontsov <[email protected]>
- *
- * 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 <sys/stat.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 char *input_file;
-static char *output_file;
-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,
-};
-
-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;
- int match;
- char *src = _src;
- char *dst = _dst;
- unsigned int ch;
-
- while (*src) {
- if (*src == '\\' && *(src+1) == 'x') {
- match = sscanf(src + 2, "%2x", &ch);
- if (!match)
- pabort("malformed input string");
-
- src += 4;
- *dst++ = (unsigned char)ch;
- } else {
- *dst++ = *src++;
- }
- ret++;
- }
- return ret;
-}
-
-static void transfer(int fd, uint8_t const *tx, size_t len)
-{
- int ret;
- int out_fd;
- uint8_t *rx = malloc(len);
- 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");
-
- 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");
-
- free(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"
- " -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");
- 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' },
- { "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' },
- { NULL, 0, 0, 0 },
- };
- int c;
-
- c = getopt_long(argc, argv, "D:s:d:b:i:o: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 'i':
- input_file = optarg;
- break;
- case 'o':
- output_file = 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;
- }
-}
-
-static void transfer_escaped_string(int fd, char *str)
-{
- size_t size = strlen(str + 1);
- uint8_t *tx = malloc(size);
-
- size = unescape((char *)tx, str, size);
- transfer(fd, tx, size);
- free(tx);
-}
-
-static void transfer_file(int fd, char *filename)
-{
- ssize_t bytes;
- struct stat sb;
- int tx_fd;
- uint8_t *tx;
-
- if (stat(filename, &sb) == -1)
- pabort("can't stat input file");
-
- if (sb.st_size > 4096)
- pabort("input file exceeds spidev's 4k limit");
-
- tx_fd = open(filename, O_RDONLY);
- if (fd < 0)
- pabort("can't open input file");
-
- tx = malloc(sb.st_size);
- bytes = read(tx_fd, tx, sb.st_size);
- if (bytes != sb.st_size)
- pabort("failed to read input file");
-
- transfer(fd, tx, sb.st_size);
- free(tx);
- close(tx_fd);
-}
-
-int main(int argc, char *argv[])
-{
- int ret = 0;
- int fd;
-
- 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 && 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, sizeof(default_tx));
-
- close(fd);
-
- return ret;
-}
diff --git a/tools/Makefile b/tools/Makefile
index 428fb4d..864762a 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
@@ -102,7 +103,7 @@ 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:
@@ -131,6 +132,7 @@ clean: acpi_clean \
lguest_clean \
perf_clean \
selftests_clean \
+ spi_clean \
tmon_clean \
turbostat_clean \
usb_clean \
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..bf6070c
--- /dev/null
+++ b/tools/spi/spidev_test.c
@@ -0,0 +1,385 @@
+/*
+ * SPI testing utility (using spidev driver)
+ *
+ * Copyright (c) 2007 MontaVista Software, Inc.
+ * Copyright (c) 2007 Anton Vorontsov <[email protected]>
+ *
+ * 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 <sys/stat.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 char *input_file;
+static char *output_file;
+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,
+};
+
+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;
+ int match;
+ char *src = _src;
+ char *dst = _dst;
+ unsigned int ch;
+
+ while (*src) {
+ if (*src == '\\' && *(src+1) == 'x') {
+ match = sscanf(src + 2, "%2x", &ch);
+ if (!match)
+ pabort("malformed input string");
+
+ src += 4;
+ *dst++ = (unsigned char)ch;
+ } else {
+ *dst++ = *src++;
+ }
+ ret++;
+ }
+ return ret;
+}
+
+static void transfer(int fd, uint8_t const *tx, size_t len)
+{
+ int ret;
+ int out_fd;
+ uint8_t *rx = malloc(len);
+ 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");
+
+ 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");
+
+ free(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"
+ " -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");
+ 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' },
+ { "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' },
+ { NULL, 0, 0, 0 },
+ };
+ int c;
+
+ c = getopt_long(argc, argv, "D:s:d:b:i:o: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 'i':
+ input_file = optarg;
+ break;
+ case 'o':
+ output_file = 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;
+ }
+}
+
+static void transfer_escaped_string(int fd, char *str)
+{
+ size_t size = strlen(str + 1);
+ uint8_t *tx = malloc(size);
+
+ size = unescape((char *)tx, str, size);
+ transfer(fd, tx, size);
+ free(tx);
+}
+
+static void transfer_file(int fd, char *filename)
+{
+ ssize_t bytes;
+ struct stat sb;
+ int tx_fd;
+ uint8_t *tx;
+
+ if (stat(filename, &sb) == -1)
+ pabort("can't stat input file");
+
+ if (sb.st_size > 4096)
+ pabort("input file exceeds spidev's 4k limit");
+
+ tx_fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ pabort("can't open input file");
+
+ tx = malloc(sb.st_size);
+ bytes = read(tx_fd, tx, sb.st_size);
+ if (bytes != sb.st_size)
+ pabort("failed to read input file");
+
+ transfer(fd, tx, sb.st_size);
+ free(tx);
+ close(tx_fd);
+}
+
+int main(int argc, char *argv[])
+{
+ int ret = 0;
+ int fd;
+
+ 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 && 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, sizeof(default_tx));
+
+ close(fd);
+
+ return ret;
+}
--
2.5.0
On Tue, Nov 17, 2015 at 07:24:20AM -0800, Joshua Clayton wrote:
> Documentation/spi/spidev_test.c: use one rx buffer
> Documentation/spi/spidev_test.c: clean up input_tx
> Documentation/spi/spidev_test.c: accept input from a file
> Documentation/spi/spidev_test.c: output to a file
> Documentation/spi/spidev_test.c: check error
> Documentation/spi/spidev_test.c: fix whitespace
Please use subjct lines reflecting the style for the subsystem.
On Tuesday, November 17, 2015 03:37:46 PM Mark Brown wrote:
> On Tue, Nov 17, 2015 at 07:24:20AM -0800, Joshua Clayton wrote:
>
> > Documentation/spi/spidev_test.c: use one rx buffer
> > Documentation/spi/spidev_test.c: clean up input_tx
> > Documentation/spi/spidev_test.c: accept input from a file
> > Documentation/spi/spidev_test.c: output to a file
> > Documentation/spi/spidev_test.c: check error
> > Documentation/spi/spidev_test.c: fix whitespace
>
> Please use subjct lines reflecting the style for the subsystem.
OK. Will do.
Assuming "spi: spidev_test: yadda..."
It was a bit unclear due to the location of the file.
--
~Joshua Clayton
On Tue, Nov 17, 2015 at 08:15:45AM -0800, Joshua Clayton wrote:
> On Tuesday, November 17, 2015 03:37:46 PM Mark Brown wrote:
> > On Tue, Nov 17, 2015 at 07:24:20AM -0800, Joshua Clayton wrote:
> > > Documentation/spi/spidev_test.c: use one rx buffer
> > > Documentation/spi/spidev_test.c: clean up input_tx
> > > Documentation/spi/spidev_test.c: accept input from a file
> > > Documentation/spi/spidev_test.c: output to a file
> > > Documentation/spi/spidev_test.c: check error
> > > Documentation/spi/spidev_test.c: fix whitespace
> > Please use subjct lines reflecting the style for the subsystem.
> OK. Will do.
> Assuming "spi: spidev_test: yadda..."
Something like that.
> It was a bit unclear due to the location of the file.
It's not really the location that you should be focusing on, it's other
commits in the file.
On Tue, Nov 17, 2015 at 07:24:21AM -0800, Joshua Clayton wrote:
> default_rx and rx are needlessly different.
> Use one buffer, local to transmit()
Why? This isn't what I'd expect from black boxing the API, from a
userspace point of view the transfer is atomic and in an ideal world
we'd be able to do direct to/from memory transfers rather than memcpy()
into kernel space which means that userspace should assume the transfers
are going on simultaneously even if they don't currently.
On Tue, Nov 17, 2015 at 07:24:22AM -0800, Joshua Clayton wrote:
> Put input from string into its own function.
Again, why are we doing this? I'm having a hard time seeing what the
gain is, the amount of code being moved is tiny.
On Tue, Nov 17, 2015 at 07:24:27AM -0800, Joshua Clayton wrote:
> Signed-off-by: Joshua Clayton <[email protected]>
> ---
> tools/Makefile | 37 ++++++++++++++++++++++++++++++-------
> 1 file changed, 30 insertions(+), 7 deletions(-)
>
> diff --git a/tools/Makefile b/tools/Makefile
> index 9a617ad..428fb4d 100644
> --- a/tools/Makefile
> +++ b/tools/Makefile
> @@ -80,10 +80,21 @@ turbostat_install x86_energy_perf_policy_install:
> tmon_install:
> $(call descend,thermal/$(@:_install=),install)
>
> -install: acpi_install cgroup_install cpupower_install hv_install firewire_install lguest_install \
> - perf_install selftests_install turbostat_install usb_install \
> - virtio_install vm_install net_install x86_energy_perf_policy_install \
> - tmon
> +install: acpi_install \
> + cgroup_install \
> + cpupower_install \
> + hv_install \
> + firewire_install \
> + lguest_install \
> + perf_install \
> + selftests_install \
> + tmon \
> + turbostat_install \
> + usb_install \
> + virtio_install \
> + vm_install \
> + net_install \
> + x86_energy_perf_policy_install
This isn't a whitespace cleanup, this is a substantial reindentation of
the file :( Please ensure your changelogs are accurate and in general
try to avoid mixing this sort of invasive stylistic change in with other
patch serieses, it reduces the potential for conflicts.
On Tue, Nov 17, 2015 at 07:24:28AM -0800, Joshua Clayton wrote:
> 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.
Trivial moves like this should generally come early rather than
later in the series so that they are easier to apply, as this is at the
end of the series it depends on the entire series.
On 17.11.2015 16:24, Joshua Clayton wrote:
> Add input file support to facilitate testing larger data.
>
> Signed-off-by: Joshua Clayton <[email protected]>
> ---
> Documentation/spi/spidev_test.c | 42 ++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 41 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
> index 1ed9110..ef812ad 100644
> --- a/Documentation/spi/spidev_test.c
> +++ b/Documentation/spi/spidev_test.c
> @@ -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;
> @@ -259,6 +267,33 @@ 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;
> +
> + if (stat(filename, &sb) == -1)
> + pabort("can't stat input file");
> +
> + if (sb.st_size > 4096)
> + pabort("input file exceeds spidev's 4k limit");
This is not a true. IIRC PAGE_SIZE is the default buffer size for
spidev, but can be changed using bufsiz module parameter.
Just 'insmod spidev bufsiz=X', where X is number of bytes.
> +
> + tx_fd = open(filename, O_RDONLY);
> + if (fd < 0)
> + pabort("can't open input file");
> +
> + tx = malloc(sb.st_size);
It would be good to check new allocations for fail.
> + bytes = read(tx_fd, tx, sb.st_size);
> + if (bytes != sb.st_size)
> + pabort("failed to read input file");
> +
> + transfer(fd, tx, sb.st_size);
> + free(tx);
> + close(tx_fd);
> +}
> +
> int main(int argc, char *argv[])
> {
> int ret = 0;
> @@ -307,8 +342,13 @@ 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, sizeof(default_tx));
>
>
On Tue, Nov 17, 2015 at 07:26:54PM +0100, Anton Bondarenko wrote:
> On 17.11.2015 16:24, Joshua Clayton wrote:
> >+ if (sb.st_size > 4096)
> >+ pabort("input file exceeds spidev's 4k limit");
> This is not a true. IIRC PAGE_SIZE is the default buffer size for spidev,
> but can be changed using bufsiz module parameter.
> Just 'insmod spidev bufsiz=X', where X is number of bytes.
Right, there's also various options for changing PAGE_SIZE on some
architectures. I was going to go and check what we actually do here but
in general it does seem better to just let the kernel worry about
validating things like this - it needs to do that anyway and it means
that if someone improves the kernel code to accept larger buffers then
the tool will automatically be able to use them instead of requiring
people to remember to separately update the tool.
On Tuesday, November 17, 2015 05:41:56 PM Mark Brown wrote:
> On Tue, Nov 17, 2015 at 07:24:21AM -0800, Joshua Clayton wrote:
>
> > default_rx and rx are needlessly different.
> > Use one buffer, local to transmit()
>
> Why? This isn't what I'd expect from black boxing the API, from a
> userspace point of view the transfer is atomic and in an ideal world
> we'd be able to do direct to/from memory transfers rather than memcpy()
> into kernel space which means that userspace should assume the transfers
> are going on simultaneously even if they don't currently.
The important thing here was to get rid of the default_rx buffer.
I just noticed that the output can be set up completely within the scope
of the transmit function, since the operands are global. But I would be
just as happy to set it up at the top level. I'll change this in V2
--
~Joshua Clayton
On Tuesday, November 17, 2015 05:43:33 PM Mark Brown wrote:
> On Tue, Nov 17, 2015 at 07:24:22AM -0800, Joshua Clayton wrote:
> > Put input from string into its own function.
>
> Again, why are we doing this? I'm having a hard time seeing what the
> gain is, the amount of code being moved is tiny.
It takes some clutter out of main() whose scope is limited to that little block of code,
and because in the next patch we add another (larger)function to the if/else block.
I don't know if it is valid to say "look at the next commit" for justification, but
That is the reason.
--
~Joshua Clayton
On Tuesday, November 17, 2015 07:26:54 PM Anton Bondarenko wrote:
> On 17.11.2015 16:24, Joshua Clayton wrote:
> > + if (sb.st_size > 4096)
> > + pabort("input file exceeds spidev's 4k limit");
> This is not a true. IIRC PAGE_SIZE is the default buffer size for
> spidev, but can be changed using bufsiz module parameter.
> Just 'insmod spidev bufsiz=X', where X is number of bytes.
You are right. I will drop this. As Mark suggests.
The ioctl gives a nice error code if the buffer is too big.
...
> > + tx = malloc(sb.st_size);
> It would be good to check new allocations for fail.
I will add a check for this.
--
~Joshua Clayton
On Tuesday, November 17, 2015 06:09:24 PM Mark Brown wrote:
> On Tue, Nov 17, 2015 at 07:24:27AM -0800, Joshua Clayton wrote:
> > Signed-off-by: Joshua Clayton <[email protected]>
> > ---
> > tools/Makefile | 37 ++++++++++++++++++++++++++++++-------
> > 1 file changed, 30 insertions(+), 7 deletions(-)
> >
> > diff --git a/tools/Makefile b/tools/Makefile
> > index 9a617ad..428fb4d 100644
> > --- a/tools/Makefile
> > +++ b/tools/Makefile
> > @@ -80,10 +80,21 @@ turbostat_install x86_energy_perf_policy_install:
> > tmon_install:
> > $(call descend,thermal/$(@:_install=),install)
> >
> > -install: acpi_install cgroup_install cpupower_install hv_install firewire_install lguest_install \
> > - perf_install selftests_install turbostat_install usb_install \
> > - virtio_install vm_install net_install x86_energy_perf_policy_install \
> > - tmon
> > +install: acpi_install \
> > + cgroup_install \
> > + cpupower_install \
> > + hv_install \
> > + firewire_install \
> > + lguest_install \
> > + perf_install \
> > + selftests_install \
> > + tmon \
> > + turbostat_install \
> > + usb_install \
> > + virtio_install \
> > + vm_install \
> > + net_install \
> > + x86_energy_perf_policy_install
>
> This isn't a whitespace cleanup, this is a substantial reindentation of
> the file :( Please ensure your changelogs are accurate and in general
> try to avoid mixing this sort of invasive stylistic change in with other
> patch serieses, it reduces the potential for conflicts.
Um.
Inability to resist Makefile cleanup is a weakness of mine.
It is a tangent from the rest of the series so I'll drop it.
--
~Joshua Clayton
On Tue, Nov 17, 2015 at 11:21:12AM -0800, Joshua Clayton wrote:
Please fix your mail client to word wrap within paragraphs at something
substantially less than 80 columns. Doing this makes your messages much
easier to read and reply to.
> It takes some clutter out of main() whose scope is limited to that little block of code,
> and because in the next patch we add another (larger)function to the if/else block.
> I don't know if it is valid to say "look at the next commit" for justification, but
> That is the reason.
That's totally fine - just say that it's to support future changes in
this area. It's good to split out mechanical changes like this from the
more complex changes, you just need to say why they're happening.
Add to spidev_test, the ability to read from and write to a file.
Clean up code along the way.
As I finished, I found that a request has been made to move
spidev_test from Documentation to tools, so I did that as well.
Thanks to Mark Brown and Anton Bodarenko for feedback on v1
v2 Changes:
- Move spidev_test to tools in the first commit instead of the last.
- Drop the patch that formats tools/Makefile
- Drop the patch that changes rx to a local variable in transfer()
- Check the result of malloc everywhere it is called.
- Change all the patch subjects to spi: spidev_test
- Removed a check of the spi transfer buffer size, in favor of
letting the kernel give an error in the ioctl if too big.
Joshua Clayton (6):
spi: Move spi code from Documentation to tools
spi: spidev_test: transfer_escaped_string function
spi: spidev_test: accept input from a file
spi: spidev_test: output to a file
spi: spidev_test: check error
spi: spidev_test: fix whitespace
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 | 399 ++++++++++++++++++++++++++++++++++++++++
8 files changed, 566 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
--
2.5.0
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 <[email protected]>
---
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 <[email protected]>
- *
- * 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 <[email protected]>
+ *
+ * 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
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 <[email protected]>
---
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
Add input file support to facilitate testing larger data.
Signed-off-by: Joshua Clayton <[email protected]>
---
tools/spi/spidev_test.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 47 insertions(+), 1 deletion(-)
diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index f9d2957..71a45a4 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -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));
--
2.5.0
For testing of larger data transfers, output unmodified data
directly to a file.
Signed-off-by: Joshua Clayton <[email protected]>
---
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
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 <[email protected]>
---
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
Signed-off-by: Joshua Clayton <[email protected]>
---
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