utils/spidev_test: build package directly from Linux

Jeff Kletsky noted in his patch titled:
"utils/spidev_test: Update to current source from upstream Linux"
that the spidev_test utility OpenWrt ships is severly out of date.

Instead of updating the spidev_test.c from the current kernel,
this patch replaces the package building code to utilize the
very file that gets shipped with the kernel we compiling for
anyway much like the "perf" package already does.

Reported-by: Jeff Kletsky <git-commits@allycomm.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

2 files changed, 23 insertions, 321 deletions

diff --git a/package/utils/spidev_test/Makefile b/package/utils/spidev_test/Makefile
index b7c5227f91..29c6a90dc8 100644
--- a/package/utils/spidev_test/Makefile
+++ b/package/utils/spidev_test/Makefile
@@ -10,13 +10,16 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=spidev-test
 PKG_RELEASE:=$(LINUX_VERSION)
+PKG_FLAGS:=nonshared
+PKG_BUILD_DIR:=$(LINUX_DIR)/tools/spi-$(TARGET_DIR_NAME)
+PKG_BUILD_PARALLEL:=1
 
 include $(INCLUDE_DIR)/package.mk
 
 define Package/spidev-test
   SECTION:=utils
   CATEGORY:=Utilities
-  DEPENDS:=+kmod-spi-dev
+  DEPENDS:=+kmod-spi-dev @!IN_SDK
   TITLE:=SPI testing utility
   VERSION:=$(LINUX_VERSION)-$(PKG_RELEASE)
   URL:=http://www.kernel.org
@@ -27,9 +30,26 @@ define Package/spidev-test/description
   SPI testing utility.
 endef
 
+define Build/Prepare
+	$(CP) $(LINUX_DIR)/tools/spi/* $(PKG_BUILD_DIR)/
+endef
+
+MAKE_FLAGS = \
+	ARCH="$(LINUX_KARCH)" \
+	CROSS_COMPILE="$(TARGET_CROSS)" \
+	CC="$(TARGET_CC)" \
+	LD="$(TARGET_CROSS)ld" \
+	CFLAGS="$(TARGET_CFLAGS) $(TARGET_CPPFLAGS)" \
+	LDFLAGS="$(TARGET_LDFLAGS)" \
+	$(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
+	WERROR=0 \
+	prefix=/usr
+
 define Build/Compile
-	$(TARGET_CC) $(TARGET_CFLAGS) -o $(PKG_BUILD_DIR)/spidev_test \
-		$(PKG_BUILD_DIR)/spidev_test.c
+	+$(MAKE_FLAGS) $(MAKE) $(PKG_JOBS) \
+		-C $(PKG_BUILD_DIR) \
+		-f Makefile \
+		--no-print-directory
 endef
 
 define Package/spidev-test/install
diff --git a/package/utils/spidev_test/src/spidev_test.c b/package/utils/spidev_test/src/spidev_test.c
deleted file mode 100644
index 135b3f592b..0000000000
--- a/package/utils/spidev_test/src/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;
-}