Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753965AbbKQPZZ (ORCPT ); Tue, 17 Nov 2015 10:25:25 -0500 Received: from mail-pa0-f65.google.com ([209.85.220.65]:32791 "EHLO mail-pa0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750835AbbKQPZX (ORCPT ); Tue, 17 Nov 2015 10:25:23 -0500 From: Joshua Clayton To: Mark Brown Cc: Jonathan Corbet , Adrian Remonda , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, Joshua Clayton Subject: [PATCH 3/8] Documentation/spi/spidev_test.c: accept input from a file Date: Tue, 17 Nov 2015 07:24:23 -0800 Message-Id: X-Mailer: git-send-email 2.5.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3348 Lines: 119 Add input file support to facilitate testing larger data. Signed-off-by: Joshua Clayton --- 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 #include #include +#include #include #include @@ -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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/