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Subject[PATCH v2 1/6] spi: Move spi code from Documentation to tools
Date
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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