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Commit | Line | Data |
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22b238bd AV |
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> | |
b78ce7ed | 18 | #include <string.h> |
22b238bd AV |
19 | #include <getopt.h> |
20 | #include <fcntl.h> | |
9006a7b3 | 21 | #include <time.h> |
22b238bd | 22 | #include <sys/ioctl.h> |
8736f802 | 23 | #include <linux/ioctl.h> |
7af475a5 | 24 | #include <sys/stat.h> |
22b238bd AV |
25 | #include <linux/types.h> |
26 | #include <linux/spi/spidev.h> | |
27 | ||
28 | #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) | |
29 | ||
30 | static void pabort(const char *s) | |
31 | { | |
32 | perror(s); | |
33 | abort(); | |
34 | } | |
35 | ||
cd58310d | 36 | static const char *device = "/dev/spidev1.1"; |
c2e78c34 | 37 | static uint32_t mode; |
22b238bd | 38 | static uint8_t bits = 8; |
7af475a5 | 39 | static char *input_file; |
983b2788 | 40 | static char *output_file; |
22b238bd AV |
41 | static uint32_t speed = 500000; |
42 | static uint16_t delay; | |
31a5c5a7 | 43 | static int verbose; |
9006a7b3 FI |
44 | static int transfer_size; |
45 | static int iterations; | |
46 | static int interval = 5; /* interval in seconds for showing transfer rate */ | |
22b238bd | 47 | |
30061915 AR |
48 | uint8_t default_tx[] = { |
49 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
50 | 0x40, 0x00, 0x00, 0x00, 0x00, 0x95, | |
51 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
52 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
53 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
54 | 0xF0, 0x0D, | |
55 | }; | |
56 | ||
57 | uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, }; | |
58 | char *input_tx; | |
59 | ||
b2cfc904 JC |
60 | static void hex_dump(const void *src, size_t length, size_t line_size, |
61 | char *prefix) | |
b78ce7ed AR |
62 | { |
63 | int i = 0; | |
64 | const unsigned char *address = src; | |
65 | const unsigned char *line = address; | |
66 | unsigned char c; | |
67 | ||
68 | printf("%s | ", prefix); | |
69 | while (length-- > 0) { | |
70 | printf("%02X ", *address++); | |
71 | if (!(++i % line_size) || (length == 0 && i % line_size)) { | |
72 | if (length == 0) { | |
73 | while (i++ % line_size) | |
74 | printf("__ "); | |
75 | } | |
76 | printf(" | "); /* right close */ | |
77 | while (line < address) { | |
78 | c = *line++; | |
79 | printf("%c", (c < 33 || c == 255) ? 0x2E : c); | |
80 | } | |
81 | printf("\n"); | |
82 | if (length > 0) | |
83 | printf("%s | ", prefix); | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
30061915 AR |
88 | /* |
89 | * Unescape - process hexadecimal escape character | |
90 | * converts shell input "\x23" -> 0x23 | |
91 | */ | |
07eec628 | 92 | static int unescape(char *_dst, char *_src, size_t len) |
30061915 AR |
93 | { |
94 | int ret = 0; | |
a20874f7 | 95 | int match; |
30061915 AR |
96 | char *src = _src; |
97 | char *dst = _dst; | |
98 | unsigned int ch; | |
99 | ||
100 | while (*src) { | |
101 | if (*src == '\\' && *(src+1) == 'x') { | |
a20874f7 JC |
102 | match = sscanf(src + 2, "%2x", &ch); |
103 | if (!match) | |
104 | pabort("malformed input string"); | |
105 | ||
30061915 AR |
106 | src += 4; |
107 | *dst++ = (unsigned char)ch; | |
108 | } else { | |
109 | *dst++ = *src++; | |
110 | } | |
111 | ret++; | |
112 | } | |
113 | return ret; | |
114 | } | |
115 | ||
116 | static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len) | |
22b238bd AV |
117 | { |
118 | int ret; | |
983b2788 | 119 | int out_fd; |
22b238bd AV |
120 | struct spi_ioc_transfer tr = { |
121 | .tx_buf = (unsigned long)tx, | |
122 | .rx_buf = (unsigned long)rx, | |
30061915 | 123 | .len = len, |
22b238bd AV |
124 | .delay_usecs = delay, |
125 | .speed_hz = speed, | |
126 | .bits_per_word = bits, | |
127 | }; | |
128 | ||
c2e78c34 GU |
129 | if (mode & SPI_TX_QUAD) |
130 | tr.tx_nbits = 4; | |
131 | else if (mode & SPI_TX_DUAL) | |
132 | tr.tx_nbits = 2; | |
133 | if (mode & SPI_RX_QUAD) | |
134 | tr.rx_nbits = 4; | |
135 | else if (mode & SPI_RX_DUAL) | |
136 | tr.rx_nbits = 2; | |
137 | if (!(mode & SPI_LOOP)) { | |
138 | if (mode & (SPI_TX_QUAD | SPI_TX_DUAL)) | |
139 | tr.rx_buf = 0; | |
140 | else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL)) | |
141 | tr.tx_buf = 0; | |
142 | } | |
143 | ||
22b238bd | 144 | ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr); |
95b1ed2a | 145 | if (ret < 1) |
22b238bd AV |
146 | pabort("can't send spi message"); |
147 | ||
31a5c5a7 | 148 | if (verbose) |
30061915 | 149 | hex_dump(tx, len, 32, "TX"); |
983b2788 JC |
150 | |
151 | if (output_file) { | |
152 | out_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
153 | if (out_fd < 0) | |
154 | pabort("could not open output file"); | |
155 | ||
156 | ret = write(out_fd, rx, len); | |
157 | if (ret != len) | |
edd3899c | 158 | pabort("not all bytes written to output file"); |
983b2788 JC |
159 | |
160 | close(out_fd); | |
161 | } | |
162 | ||
9006a7b3 | 163 | if (verbose) |
983b2788 | 164 | hex_dump(rx, len, 32, "RX"); |
22b238bd AV |
165 | } |
166 | ||
b7ed698c | 167 | static void print_usage(const char *prog) |
22b238bd | 168 | { |
9006a7b3 | 169 | printf("Usage: %s [-DsbdlHOLC3vpNR24SI]\n", prog); |
22b238bd AV |
170 | puts(" -D --device device to use (default /dev/spidev1.1)\n" |
171 | " -s --speed max speed (Hz)\n" | |
172 | " -d --delay delay (usec)\n" | |
b2cfc904 | 173 | " -b --bpw bits per word\n" |
7af475a5 | 174 | " -i --input input data from a file (e.g. \"test.bin\")\n" |
983b2788 | 175 | " -o --output output data to a file (e.g. \"results.bin\")\n" |
22b238bd AV |
176 | " -l --loop loopback\n" |
177 | " -H --cpha clock phase\n" | |
178 | " -O --cpol clock polarity\n" | |
179 | " -L --lsb least significant bit first\n" | |
180 | " -C --cs-high chip select active high\n" | |
925d16a2 | 181 | " -3 --3wire SI/SO signals shared\n" |
31a5c5a7 | 182 | " -v --verbose Verbose (show tx buffer)\n" |
30061915 | 183 | " -p Send data (e.g. \"1234\\xde\\xad\")\n" |
925d16a2 | 184 | " -N --no-cs no chip select\n" |
c2e78c34 GU |
185 | " -R --ready slave pulls low to pause\n" |
186 | " -2 --dual dual transfer\n" | |
9006a7b3 FI |
187 | " -4 --quad quad transfer\n" |
188 | " -S --size transfer size\n" | |
189 | " -I --iter iterations\n"); | |
22b238bd AV |
190 | exit(1); |
191 | } | |
192 | ||
b7ed698c | 193 | static void parse_opts(int argc, char *argv[]) |
22b238bd AV |
194 | { |
195 | while (1) { | |
cd58310d | 196 | static const struct option lopts[] = { |
22b238bd AV |
197 | { "device", 1, 0, 'D' }, |
198 | { "speed", 1, 0, 's' }, | |
199 | { "delay", 1, 0, 'd' }, | |
200 | { "bpw", 1, 0, 'b' }, | |
7af475a5 | 201 | { "input", 1, 0, 'i' }, |
983b2788 | 202 | { "output", 1, 0, 'o' }, |
22b238bd AV |
203 | { "loop", 0, 0, 'l' }, |
204 | { "cpha", 0, 0, 'H' }, | |
205 | { "cpol", 0, 0, 'O' }, | |
206 | { "lsb", 0, 0, 'L' }, | |
207 | { "cs-high", 0, 0, 'C' }, | |
208 | { "3wire", 0, 0, '3' }, | |
b55f627f DB |
209 | { "no-cs", 0, 0, 'N' }, |
210 | { "ready", 0, 0, 'R' }, | |
c2e78c34 | 211 | { "dual", 0, 0, '2' }, |
31a5c5a7 | 212 | { "verbose", 0, 0, 'v' }, |
c2e78c34 | 213 | { "quad", 0, 0, '4' }, |
9006a7b3 FI |
214 | { "size", 1, 0, 'S' }, |
215 | { "iter", 1, 0, 'I' }, | |
22b238bd AV |
216 | { NULL, 0, 0, 0 }, |
217 | }; | |
218 | int c; | |
219 | ||
9006a7b3 | 220 | c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR24p:vS:I:", |
7af475a5 | 221 | lopts, NULL); |
22b238bd AV |
222 | |
223 | if (c == -1) | |
224 | break; | |
225 | ||
226 | switch (c) { | |
227 | case 'D': | |
228 | device = optarg; | |
229 | break; | |
230 | case 's': | |
231 | speed = atoi(optarg); | |
232 | break; | |
233 | case 'd': | |
234 | delay = atoi(optarg); | |
235 | break; | |
236 | case 'b': | |
237 | bits = atoi(optarg); | |
238 | break; | |
7af475a5 JC |
239 | case 'i': |
240 | input_file = optarg; | |
241 | break; | |
983b2788 JC |
242 | case 'o': |
243 | output_file = optarg; | |
244 | break; | |
22b238bd AV |
245 | case 'l': |
246 | mode |= SPI_LOOP; | |
247 | break; | |
248 | case 'H': | |
249 | mode |= SPI_CPHA; | |
250 | break; | |
251 | case 'O': | |
252 | mode |= SPI_CPOL; | |
253 | break; | |
254 | case 'L': | |
255 | mode |= SPI_LSB_FIRST; | |
256 | break; | |
257 | case 'C': | |
258 | mode |= SPI_CS_HIGH; | |
259 | break; | |
260 | case '3': | |
261 | mode |= SPI_3WIRE; | |
262 | break; | |
b55f627f DB |
263 | case 'N': |
264 | mode |= SPI_NO_CS; | |
265 | break; | |
31a5c5a7 AR |
266 | case 'v': |
267 | verbose = 1; | |
268 | break; | |
b55f627f DB |
269 | case 'R': |
270 | mode |= SPI_READY; | |
271 | break; | |
30061915 AR |
272 | case 'p': |
273 | input_tx = optarg; | |
274 | break; | |
c2e78c34 GU |
275 | case '2': |
276 | mode |= SPI_TX_DUAL; | |
277 | break; | |
278 | case '4': | |
279 | mode |= SPI_TX_QUAD; | |
280 | break; | |
9006a7b3 FI |
281 | case 'S': |
282 | transfer_size = atoi(optarg); | |
283 | break; | |
284 | case 'I': | |
285 | iterations = atoi(optarg); | |
286 | break; | |
22b238bd AV |
287 | default: |
288 | print_usage(argv[0]); | |
289 | break; | |
290 | } | |
291 | } | |
c2e78c34 GU |
292 | if (mode & SPI_LOOP) { |
293 | if (mode & SPI_TX_DUAL) | |
294 | mode |= SPI_RX_DUAL; | |
295 | if (mode & SPI_TX_QUAD) | |
296 | mode |= SPI_RX_QUAD; | |
297 | } | |
22b238bd AV |
298 | } |
299 | ||
5c437a40 JC |
300 | static void transfer_escaped_string(int fd, char *str) |
301 | { | |
0278b34b | 302 | size_t size = strlen(str); |
5c437a40 JC |
303 | uint8_t *tx; |
304 | uint8_t *rx; | |
305 | ||
306 | tx = malloc(size); | |
307 | if (!tx) | |
308 | pabort("can't allocate tx buffer"); | |
309 | ||
310 | rx = malloc(size); | |
311 | if (!rx) | |
312 | pabort("can't allocate rx buffer"); | |
313 | ||
314 | size = unescape((char *)tx, str, size); | |
315 | transfer(fd, tx, rx, size); | |
316 | free(rx); | |
317 | free(tx); | |
318 | } | |
319 | ||
7af475a5 JC |
320 | static void transfer_file(int fd, char *filename) |
321 | { | |
322 | ssize_t bytes; | |
323 | struct stat sb; | |
324 | int tx_fd; | |
325 | uint8_t *tx; | |
326 | uint8_t *rx; | |
327 | ||
328 | if (stat(filename, &sb) == -1) | |
329 | pabort("can't stat input file"); | |
330 | ||
331 | tx_fd = open(filename, O_RDONLY); | |
e634b76c | 332 | if (tx_fd < 0) |
7af475a5 JC |
333 | pabort("can't open input file"); |
334 | ||
335 | tx = malloc(sb.st_size); | |
336 | if (!tx) | |
337 | pabort("can't allocate tx buffer"); | |
338 | ||
339 | rx = malloc(sb.st_size); | |
340 | if (!rx) | |
341 | pabort("can't allocate rx buffer"); | |
342 | ||
343 | bytes = read(tx_fd, tx, sb.st_size); | |
344 | if (bytes != sb.st_size) | |
345 | pabort("failed to read input file"); | |
346 | ||
347 | transfer(fd, tx, rx, sb.st_size); | |
348 | free(rx); | |
349 | free(tx); | |
350 | close(tx_fd); | |
351 | } | |
352 | ||
9006a7b3 FI |
353 | static uint64_t _read_count; |
354 | static uint64_t _write_count; | |
355 | ||
356 | static void show_transfer_rate(void) | |
357 | { | |
358 | static uint64_t prev_read_count, prev_write_count; | |
359 | double rx_rate, tx_rate; | |
360 | ||
361 | rx_rate = ((_read_count - prev_read_count) * 8) / (interval*1000.0); | |
362 | tx_rate = ((_write_count - prev_write_count) * 8) / (interval*1000.0); | |
363 | ||
364 | printf("rate: tx %.1fkbps, rx %.1fkbps\n", rx_rate, tx_rate); | |
365 | ||
366 | prev_read_count = _read_count; | |
367 | prev_write_count = _write_count; | |
368 | } | |
369 | ||
370 | static void transfer_buf(int fd, int len) | |
371 | { | |
372 | uint8_t *tx; | |
373 | uint8_t *rx; | |
374 | int i; | |
375 | ||
376 | tx = malloc(len); | |
377 | if (!tx) | |
378 | pabort("can't allocate tx buffer"); | |
379 | for (i = 0; i < len; i++) | |
380 | tx[i] = random(); | |
381 | ||
382 | rx = malloc(len); | |
383 | if (!rx) | |
384 | pabort("can't allocate rx buffer"); | |
385 | ||
386 | transfer(fd, tx, rx, len); | |
387 | ||
388 | _write_count += len; | |
389 | _read_count += len; | |
390 | ||
391 | if (mode & SPI_LOOP) { | |
392 | if (memcmp(tx, rx, len)) { | |
393 | fprintf(stderr, "transfer error !\n"); | |
394 | hex_dump(tx, len, 32, "TX"); | |
395 | hex_dump(rx, len, 32, "RX"); | |
396 | exit(1); | |
397 | } | |
398 | } | |
399 | ||
400 | free(rx); | |
401 | free(tx); | |
402 | } | |
403 | ||
22b238bd AV |
404 | int main(int argc, char *argv[]) |
405 | { | |
406 | int ret = 0; | |
407 | int fd; | |
408 | ||
409 | parse_opts(argc, argv); | |
410 | ||
411 | fd = open(device, O_RDWR); | |
412 | if (fd < 0) | |
413 | pabort("can't open device"); | |
414 | ||
415 | /* | |
416 | * spi mode | |
417 | */ | |
c2e78c34 | 418 | ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode); |
22b238bd AV |
419 | if (ret == -1) |
420 | pabort("can't set spi mode"); | |
421 | ||
c2e78c34 | 422 | ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode); |
22b238bd AV |
423 | if (ret == -1) |
424 | pabort("can't get spi mode"); | |
425 | ||
426 | /* | |
427 | * bits per word | |
428 | */ | |
429 | ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits); | |
430 | if (ret == -1) | |
431 | pabort("can't set bits per word"); | |
432 | ||
433 | ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits); | |
434 | if (ret == -1) | |
435 | pabort("can't get bits per word"); | |
436 | ||
437 | /* | |
438 | * max speed hz | |
439 | */ | |
440 | ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed); | |
441 | if (ret == -1) | |
442 | pabort("can't set max speed hz"); | |
443 | ||
444 | ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed); | |
445 | if (ret == -1) | |
446 | pabort("can't get max speed hz"); | |
447 | ||
c2e78c34 | 448 | printf("spi mode: 0x%x\n", mode); |
22b238bd AV |
449 | printf("bits per word: %d\n", bits); |
450 | printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000); | |
451 | ||
7af475a5 JC |
452 | if (input_tx && input_file) |
453 | pabort("only one of -p and --input may be selected"); | |
454 | ||
5c437a40 JC |
455 | if (input_tx) |
456 | transfer_escaped_string(fd, input_tx); | |
7af475a5 JC |
457 | else if (input_file) |
458 | transfer_file(fd, input_file); | |
9006a7b3 FI |
459 | else if (transfer_size) { |
460 | struct timespec last_stat; | |
461 | ||
462 | clock_gettime(CLOCK_MONOTONIC, &last_stat); | |
463 | ||
464 | while (iterations-- > 0) { | |
465 | struct timespec current; | |
466 | ||
467 | transfer_buf(fd, transfer_size); | |
468 | ||
469 | clock_gettime(CLOCK_MONOTONIC, ¤t); | |
470 | if (current.tv_sec - last_stat.tv_sec > interval) { | |
471 | show_transfer_rate(); | |
472 | last_stat = current; | |
473 | } | |
474 | } | |
475 | printf("total: tx %.1fKB, rx %.1fKB\n", | |
476 | _write_count/1024.0, _read_count/1024.0); | |
477 | } else | |
30061915 | 478 | transfer(fd, default_tx, default_rx, sizeof(default_tx)); |
22b238bd AV |
479 | |
480 | close(fd); | |
481 | ||
482 | return ret; | |
483 | } |