Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * SPI testing utility (using spidev driver) |
| 3 | * |
| 4 | * Copyright (c) 2007 MontaVista Software, Inc. |
| 5 | * Copyright (c) 2007 Anton Vorontsov <avorontsov@ru.mvista.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License. |
| 10 | * |
| 11 | * Cross-compile with cross-gcc -I/path/to/cross-kernel/include |
| 12 | */ |
| 13 | |
| 14 | #include <stdint.h> |
| 15 | #include <unistd.h> |
| 16 | #include <stdio.h> |
| 17 | #include <stdlib.h> |
Adrian Remonda | b78ce7e | 2015-03-10 16:12:30 -0400 | [diff] [blame^] | 18 | #include <string.h> |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 19 | #include <getopt.h> |
| 20 | #include <fcntl.h> |
| 21 | #include <sys/ioctl.h> |
| 22 | #include <linux/types.h> |
| 23 | #include <linux/spi/spidev.h> |
| 24 | |
| 25 | #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) |
| 26 | |
| 27 | static void pabort(const char *s) |
| 28 | { |
| 29 | perror(s); |
| 30 | abort(); |
| 31 | } |
| 32 | |
WANG Cong | cd58310 | 2007-10-16 01:27:47 -0700 | [diff] [blame] | 33 | static const char *device = "/dev/spidev1.1"; |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 34 | static uint32_t mode; |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 35 | static uint8_t bits = 8; |
| 36 | static uint32_t speed = 500000; |
| 37 | static uint16_t delay; |
| 38 | |
Adrian Remonda | b78ce7e | 2015-03-10 16:12:30 -0400 | [diff] [blame^] | 39 | static void hex_dump(const void *src, size_t length, size_t line_size, char *prefix) |
| 40 | { |
| 41 | int i = 0; |
| 42 | const unsigned char *address = src; |
| 43 | const unsigned char *line = address; |
| 44 | unsigned char c; |
| 45 | |
| 46 | printf("%s | ", prefix); |
| 47 | while (length-- > 0) { |
| 48 | printf("%02X ", *address++); |
| 49 | if (!(++i % line_size) || (length == 0 && i % line_size)) { |
| 50 | if (length == 0) { |
| 51 | while (i++ % line_size) |
| 52 | printf("__ "); |
| 53 | } |
| 54 | printf(" | "); /* right close */ |
| 55 | while (line < address) { |
| 56 | c = *line++; |
| 57 | printf("%c", (c < 33 || c == 255) ? 0x2E : c); |
| 58 | } |
| 59 | printf("\n"); |
| 60 | if (length > 0) |
| 61 | printf("%s | ", prefix); |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 66 | static void transfer(int fd) |
| 67 | { |
| 68 | int ret; |
| 69 | uint8_t tx[] = { |
| 70 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 71 | 0x40, 0x00, 0x00, 0x00, 0x00, 0x95, |
| 72 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 73 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 74 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 75 | 0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xAD, |
| 76 | 0xF0, 0x0D, |
| 77 | }; |
| 78 | uint8_t rx[ARRAY_SIZE(tx)] = {0, }; |
| 79 | struct spi_ioc_transfer tr = { |
| 80 | .tx_buf = (unsigned long)tx, |
| 81 | .rx_buf = (unsigned long)rx, |
| 82 | .len = ARRAY_SIZE(tx), |
| 83 | .delay_usecs = delay, |
| 84 | .speed_hz = speed, |
| 85 | .bits_per_word = bits, |
| 86 | }; |
| 87 | |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 88 | if (mode & SPI_TX_QUAD) |
| 89 | tr.tx_nbits = 4; |
| 90 | else if (mode & SPI_TX_DUAL) |
| 91 | tr.tx_nbits = 2; |
| 92 | if (mode & SPI_RX_QUAD) |
| 93 | tr.rx_nbits = 4; |
| 94 | else if (mode & SPI_RX_DUAL) |
| 95 | tr.rx_nbits = 2; |
| 96 | if (!(mode & SPI_LOOP)) { |
| 97 | if (mode & (SPI_TX_QUAD | SPI_TX_DUAL)) |
| 98 | tr.rx_buf = 0; |
| 99 | else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL)) |
| 100 | tr.tx_buf = 0; |
| 101 | } |
| 102 | |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 103 | ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr); |
Hector Palacios | 95b1ed2 | 2010-04-29 15:02:28 -0700 | [diff] [blame] | 104 | if (ret < 1) |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 105 | pabort("can't send spi message"); |
| 106 | |
Adrian Remonda | b78ce7e | 2015-03-10 16:12:30 -0400 | [diff] [blame^] | 107 | hex_dump(rx, ARRAY_SIZE(rx), 32, "RX"); |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 108 | } |
| 109 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 110 | static void print_usage(const char *prog) |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 111 | { |
| 112 | printf("Usage: %s [-DsbdlHOLC3]\n", prog); |
| 113 | puts(" -D --device device to use (default /dev/spidev1.1)\n" |
| 114 | " -s --speed max speed (Hz)\n" |
| 115 | " -d --delay delay (usec)\n" |
| 116 | " -b --bpw bits per word \n" |
| 117 | " -l --loop loopback\n" |
| 118 | " -H --cpha clock phase\n" |
| 119 | " -O --cpol clock polarity\n" |
| 120 | " -L --lsb least significant bit first\n" |
| 121 | " -C --cs-high chip select active high\n" |
Geert Uytterhoeven | 925d16a | 2014-02-20 16:01:43 +0100 | [diff] [blame] | 122 | " -3 --3wire SI/SO signals shared\n" |
| 123 | " -N --no-cs no chip select\n" |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 124 | " -R --ready slave pulls low to pause\n" |
| 125 | " -2 --dual dual transfer\n" |
| 126 | " -4 --quad quad transfer\n"); |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 127 | exit(1); |
| 128 | } |
| 129 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 130 | static void parse_opts(int argc, char *argv[]) |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 131 | { |
| 132 | while (1) { |
WANG Cong | cd58310 | 2007-10-16 01:27:47 -0700 | [diff] [blame] | 133 | static const struct option lopts[] = { |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 134 | { "device", 1, 0, 'D' }, |
| 135 | { "speed", 1, 0, 's' }, |
| 136 | { "delay", 1, 0, 'd' }, |
| 137 | { "bpw", 1, 0, 'b' }, |
| 138 | { "loop", 0, 0, 'l' }, |
| 139 | { "cpha", 0, 0, 'H' }, |
| 140 | { "cpol", 0, 0, 'O' }, |
| 141 | { "lsb", 0, 0, 'L' }, |
| 142 | { "cs-high", 0, 0, 'C' }, |
| 143 | { "3wire", 0, 0, '3' }, |
David Brownell | b55f627 | 2009-06-30 11:41:26 -0700 | [diff] [blame] | 144 | { "no-cs", 0, 0, 'N' }, |
| 145 | { "ready", 0, 0, 'R' }, |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 146 | { "dual", 0, 0, '2' }, |
| 147 | { "quad", 0, 0, '4' }, |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 148 | { NULL, 0, 0, 0 }, |
| 149 | }; |
| 150 | int c; |
| 151 | |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 152 | c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24", lopts, NULL); |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 153 | |
| 154 | if (c == -1) |
| 155 | break; |
| 156 | |
| 157 | switch (c) { |
| 158 | case 'D': |
| 159 | device = optarg; |
| 160 | break; |
| 161 | case 's': |
| 162 | speed = atoi(optarg); |
| 163 | break; |
| 164 | case 'd': |
| 165 | delay = atoi(optarg); |
| 166 | break; |
| 167 | case 'b': |
| 168 | bits = atoi(optarg); |
| 169 | break; |
| 170 | case 'l': |
| 171 | mode |= SPI_LOOP; |
| 172 | break; |
| 173 | case 'H': |
| 174 | mode |= SPI_CPHA; |
| 175 | break; |
| 176 | case 'O': |
| 177 | mode |= SPI_CPOL; |
| 178 | break; |
| 179 | case 'L': |
| 180 | mode |= SPI_LSB_FIRST; |
| 181 | break; |
| 182 | case 'C': |
| 183 | mode |= SPI_CS_HIGH; |
| 184 | break; |
| 185 | case '3': |
| 186 | mode |= SPI_3WIRE; |
| 187 | break; |
David Brownell | b55f627 | 2009-06-30 11:41:26 -0700 | [diff] [blame] | 188 | case 'N': |
| 189 | mode |= SPI_NO_CS; |
| 190 | break; |
| 191 | case 'R': |
| 192 | mode |= SPI_READY; |
| 193 | break; |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 194 | case '2': |
| 195 | mode |= SPI_TX_DUAL; |
| 196 | break; |
| 197 | case '4': |
| 198 | mode |= SPI_TX_QUAD; |
| 199 | break; |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 200 | default: |
| 201 | print_usage(argv[0]); |
| 202 | break; |
| 203 | } |
| 204 | } |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 205 | if (mode & SPI_LOOP) { |
| 206 | if (mode & SPI_TX_DUAL) |
| 207 | mode |= SPI_RX_DUAL; |
| 208 | if (mode & SPI_TX_QUAD) |
| 209 | mode |= SPI_RX_QUAD; |
| 210 | } |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | int main(int argc, char *argv[]) |
| 214 | { |
| 215 | int ret = 0; |
| 216 | int fd; |
| 217 | |
| 218 | parse_opts(argc, argv); |
| 219 | |
| 220 | fd = open(device, O_RDWR); |
| 221 | if (fd < 0) |
| 222 | pabort("can't open device"); |
| 223 | |
| 224 | /* |
| 225 | * spi mode |
| 226 | */ |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 227 | ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode); |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 228 | if (ret == -1) |
| 229 | pabort("can't set spi mode"); |
| 230 | |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 231 | ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode); |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 232 | if (ret == -1) |
| 233 | pabort("can't get spi mode"); |
| 234 | |
| 235 | /* |
| 236 | * bits per word |
| 237 | */ |
| 238 | ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits); |
| 239 | if (ret == -1) |
| 240 | pabort("can't set bits per word"); |
| 241 | |
| 242 | ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits); |
| 243 | if (ret == -1) |
| 244 | pabort("can't get bits per word"); |
| 245 | |
| 246 | /* |
| 247 | * max speed hz |
| 248 | */ |
| 249 | ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed); |
| 250 | if (ret == -1) |
| 251 | pabort("can't set max speed hz"); |
| 252 | |
| 253 | ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed); |
| 254 | if (ret == -1) |
| 255 | pabort("can't get max speed hz"); |
| 256 | |
Geert Uytterhoeven | c2e78c3 | 2014-02-25 11:40:18 +0100 | [diff] [blame] | 257 | printf("spi mode: 0x%x\n", mode); |
Anton Vorontsov | 22b238b | 2007-07-31 00:38:44 -0700 | [diff] [blame] | 258 | printf("bits per word: %d\n", bits); |
| 259 | printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000); |
| 260 | |
| 261 | transfer(fd); |
| 262 | |
| 263 | close(fd); |
| 264 | |
| 265 | return ret; |
| 266 | } |