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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * SPI testing utility (using spidev driver)
4 *
5 * Copyright (c) 2007 MontaVista Software, Inc.
6 * Copyright (c) 2007 Anton Vorontsov <avorontsov@ru.mvista.com>
7 *
8 * Cross-compile with cross-gcc -I/path/to/cross-kernel/include
9 */
10
11#include <stdint.h>
12#include <unistd.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <errno.h>
17#include <getopt.h>
18#include <fcntl.h>
19#include <time.h>
20#include <sys/ioctl.h>
21#include <linux/ioctl.h>
22#include <sys/stat.h>
23#include <linux/types.h>
24#include <linux/spi/spidev.h>
25
26#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
27
28static void pabort(const char *s)
29{
30 if (errno != 0)
31 perror(s);
32 else
33 printf("%s\n", s);
34
35 abort();
36}
37
38static const char *device = "/dev/spidev1.1";
39static uint32_t mode;
40static uint8_t bits = 8;
41static char *input_file;
42static char *output_file;
43static uint32_t speed = 500000;
44static uint16_t delay;
45static int verbose;
46static int transfer_size;
47static int iterations;
48static int interval = 5; /* interval in seconds for showing transfer rate */
49
50static uint8_t default_tx[] = {
51 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
52 0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
53 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
54 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
55 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
56 0xF0, 0x0D,
57};
58
59static uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };
60static char *input_tx;
61
62static void hex_dump(const void *src, size_t length, size_t line_size,
63 char *prefix)
64{
65 int i = 0;
66 const unsigned char *address = src;
67 const unsigned char *line = address;
68 unsigned char c;
69
70 printf("%s | ", prefix);
71 while (length-- > 0) {
72 printf("%02X ", *address++);
73 if (!(++i % line_size) || (length == 0 && i % line_size)) {
74 if (length == 0) {
75 while (i++ % line_size)
76 printf("__ ");
77 }
78 printf(" |");
79 while (line < address) {
80 c = *line++;
81 printf("%c", (c < 32 || c > 126) ? '.' : c);
82 }
83 printf("|\n");
84 if (length > 0)
85 printf("%s | ", prefix);
86 }
87 }
88}
89
90/*
91 * Unescape - process hexadecimal escape character
92 * converts shell input "\x23" -> 0x23
93 */
94static int unescape(char *_dst, char *_src, size_t len)
95{
96 int ret = 0;
97 int match;
98 char *src = _src;
99 char *dst = _dst;
100 unsigned int ch;
101
102 while (*src) {
103 if (*src == '\\' && *(src+1) == 'x') {
104 match = sscanf(src + 2, "%2x", &ch);
105 if (!match)
106 pabort("malformed input string");
107
108 src += 4;
109 *dst++ = (unsigned char)ch;
110 } else {
111 *dst++ = *src++;
112 }
113 ret++;
114 }
115 return ret;
116}
117
118static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
119{
120 int ret;
121 int out_fd;
122 struct spi_ioc_transfer tr = {
123 .tx_buf = (unsigned long)tx,
124 .rx_buf = (unsigned long)rx,
125 .len = len,
126 .delay_usecs = delay,
127 .speed_hz = speed,
128 .bits_per_word = bits,
129 };
130
131 if (mode & SPI_TX_OCTAL)
132 tr.tx_nbits = 8;
133 else if (mode & SPI_TX_QUAD)
134 tr.tx_nbits = 4;
135 else if (mode & SPI_TX_DUAL)
136 tr.tx_nbits = 2;
137 if (mode & SPI_RX_OCTAL)
138 tr.rx_nbits = 8;
139 else if (mode & SPI_RX_QUAD)
140 tr.rx_nbits = 4;
141 else if (mode & SPI_RX_DUAL)
142 tr.rx_nbits = 2;
143 if (!(mode & SPI_LOOP)) {
144 if (mode & (SPI_TX_OCTAL | SPI_TX_QUAD | SPI_TX_DUAL))
145 tr.rx_buf = 0;
146 else if (mode & (SPI_RX_OCTAL | SPI_RX_QUAD | SPI_RX_DUAL))
147 tr.tx_buf = 0;
148 }
149
150 ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
151 if (ret < 1)
152 pabort("can't send spi message");
153
154 if (verbose)
155 hex_dump(tx, len, 32, "TX");
156
157 if (output_file) {
158 out_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC, 0666);
159 if (out_fd < 0)
160 pabort("could not open output file");
161
162 ret = write(out_fd, rx, len);
163 if (ret != len)
164 pabort("not all bytes written to output file");
165
166 close(out_fd);
167 }
168
169 if (verbose)
170 hex_dump(rx, len, 32, "RX");
171}
172
173static void print_usage(const char *prog)
174{
175 printf("Usage: %s [-DsbdlHOLC3vpNR24SI]\n", prog);
176 puts(" -D --device device to use (default /dev/spidev1.1)\n"
177 " -s --speed max speed (Hz)\n"
178 " -d --delay delay (usec)\n"
179 " -b --bpw bits per word\n"
180 " -i --input input data from a file (e.g. \"test.bin\")\n"
181 " -o --output output data to a file (e.g. \"results.bin\")\n"
182 " -l --loop loopback\n"
183 " -H --cpha clock phase\n"
184 " -O --cpol clock polarity\n"
185 " -L --lsb least significant bit first\n"
186 " -C --cs-high chip select active high\n"
187 " -3 --3wire SI/SO signals shared\n"
188 " -v --verbose Verbose (show tx buffer)\n"
189 " -p Send data (e.g. \"1234\\xde\\xad\")\n"
190 " -N --no-cs no chip select\n"
191 " -R --ready slave pulls low to pause\n"
192 " -2 --dual dual transfer\n"
193 " -4 --quad quad transfer\n"
194 " -8 --octal octal transfer\n"
195 " -S --size transfer size\n"
196 " -I --iter iterations\n");
197 exit(1);
198}
199
200static void parse_opts(int argc, char *argv[])
201{
202 while (1) {
203 static const struct option lopts[] = {
204 { "device", 1, 0, 'D' },
205 { "speed", 1, 0, 's' },
206 { "delay", 1, 0, 'd' },
207 { "bpw", 1, 0, 'b' },
208 { "input", 1, 0, 'i' },
209 { "output", 1, 0, 'o' },
210 { "loop", 0, 0, 'l' },
211 { "cpha", 0, 0, 'H' },
212 { "cpol", 0, 0, 'O' },
213 { "lsb", 0, 0, 'L' },
214 { "cs-high", 0, 0, 'C' },
215 { "3wire", 0, 0, '3' },
216 { "no-cs", 0, 0, 'N' },
217 { "ready", 0, 0, 'R' },
218 { "dual", 0, 0, '2' },
219 { "verbose", 0, 0, 'v' },
220 { "quad", 0, 0, '4' },
221 { "octal", 0, 0, '8' },
222 { "size", 1, 0, 'S' },
223 { "iter", 1, 0, 'I' },
224 { NULL, 0, 0, 0 },
225 };
226 int c;
227
228 c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR248p:vS:I:",
229 lopts, NULL);
230
231 if (c == -1)
232 break;
233
234 switch (c) {
235 case 'D':
236 device = optarg;
237 break;
238 case 's':
239 speed = atoi(optarg);
240 break;
241 case 'd':
242 delay = atoi(optarg);
243 break;
244 case 'b':
245 bits = atoi(optarg);
246 break;
247 case 'i':
248 input_file = optarg;
249 break;
250 case 'o':
251 output_file = optarg;
252 break;
253 case 'l':
254 mode |= SPI_LOOP;
255 break;
256 case 'H':
257 mode |= SPI_CPHA;
258 break;
259 case 'O':
260 mode |= SPI_CPOL;
261 break;
262 case 'L':
263 mode |= SPI_LSB_FIRST;
264 break;
265 case 'C':
266 mode |= SPI_CS_HIGH;
267 break;
268 case '3':
269 mode |= SPI_3WIRE;
270 break;
271 case 'N':
272 mode |= SPI_NO_CS;
273 break;
274 case 'v':
275 verbose = 1;
276 break;
277 case 'R':
278 mode |= SPI_READY;
279 break;
280 case 'p':
281 input_tx = optarg;
282 break;
283 case '2':
284 mode |= SPI_TX_DUAL;
285 break;
286 case '4':
287 mode |= SPI_TX_QUAD;
288 break;
289 case '8':
290 mode |= SPI_TX_OCTAL;
291 break;
292 case 'S':
293 transfer_size = atoi(optarg);
294 break;
295 case 'I':
296 iterations = atoi(optarg);
297 break;
298 default:
299 print_usage(argv[0]);
300 }
301 }
302 if (mode & SPI_LOOP) {
303 if (mode & SPI_TX_DUAL)
304 mode |= SPI_RX_DUAL;
305 if (mode & SPI_TX_QUAD)
306 mode |= SPI_RX_QUAD;
307 if (mode & SPI_TX_OCTAL)
308 mode |= SPI_RX_OCTAL;
309 }
310}
311
312static void transfer_escaped_string(int fd, char *str)
313{
314 size_t size = strlen(str);
315 uint8_t *tx;
316 uint8_t *rx;
317
318 tx = malloc(size);
319 if (!tx)
320 pabort("can't allocate tx buffer");
321
322 rx = malloc(size);
323 if (!rx)
324 pabort("can't allocate rx buffer");
325
326 size = unescape((char *)tx, str, size);
327 transfer(fd, tx, rx, size);
328 free(rx);
329 free(tx);
330}
331
332static void transfer_file(int fd, char *filename)
333{
334 ssize_t bytes;
335 struct stat sb;
336 int tx_fd;
337 uint8_t *tx;
338 uint8_t *rx;
339
340 if (stat(filename, &sb) == -1)
341 pabort("can't stat input file");
342
343 tx_fd = open(filename, O_RDONLY);
344 if (tx_fd < 0)
345 pabort("can't open input file");
346
347 tx = malloc(sb.st_size);
348 if (!tx)
349 pabort("can't allocate tx buffer");
350
351 rx = malloc(sb.st_size);
352 if (!rx)
353 pabort("can't allocate rx buffer");
354
355 bytes = read(tx_fd, tx, sb.st_size);
356 if (bytes != sb.st_size)
357 pabort("failed to read input file");
358
359 transfer(fd, tx, rx, sb.st_size);
360 free(rx);
361 free(tx);
362 close(tx_fd);
363}
364
365static uint64_t _read_count;
366static uint64_t _write_count;
367
368static void show_transfer_rate(void)
369{
370 static uint64_t prev_read_count, prev_write_count;
371 double rx_rate, tx_rate;
372
373 rx_rate = ((_read_count - prev_read_count) * 8) / (interval*1000.0);
374 tx_rate = ((_write_count - prev_write_count) * 8) / (interval*1000.0);
375
376 printf("rate: tx %.1fkbps, rx %.1fkbps\n", rx_rate, tx_rate);
377
378 prev_read_count = _read_count;
379 prev_write_count = _write_count;
380}
381
382static void transfer_buf(int fd, int len)
383{
384 uint8_t *tx;
385 uint8_t *rx;
386 int i;
387
388 tx = malloc(len);
389 if (!tx)
390 pabort("can't allocate tx buffer");
391 for (i = 0; i < len; i++)
392 tx[i] = random();
393
394 rx = malloc(len);
395 if (!rx)
396 pabort("can't allocate rx buffer");
397
398 transfer(fd, tx, rx, len);
399
400 _write_count += len;
401 _read_count += len;
402
403 if (mode & SPI_LOOP) {
404 if (memcmp(tx, rx, len)) {
405 fprintf(stderr, "transfer error !\n");
406 hex_dump(tx, len, 32, "TX");
407 hex_dump(rx, len, 32, "RX");
408 exit(1);
409 }
410 }
411
412 free(rx);
413 free(tx);
414}
415
416int main(int argc, char *argv[])
417{
418 int ret = 0;
419 int fd;
420
421 parse_opts(argc, argv);
422
423 if (input_tx && input_file)
424 pabort("only one of -p and --input may be selected");
425
426 fd = open(device, O_RDWR);
427 if (fd < 0)
428 pabort("can't open device");
429
430 /*
431 * spi mode
432 */
433 ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
434 if (ret == -1)
435 pabort("can't set spi mode");
436
437 ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
438 if (ret == -1)
439 pabort("can't get spi mode");
440
441 /*
442 * bits per word
443 */
444 ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
445 if (ret == -1)
446 pabort("can't set bits per word");
447
448 ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
449 if (ret == -1)
450 pabort("can't get bits per word");
451
452 /*
453 * max speed hz
454 */
455 ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
456 if (ret == -1)
457 pabort("can't set max speed hz");
458
459 ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
460 if (ret == -1)
461 pabort("can't get max speed hz");
462
463 printf("spi mode: 0x%x\n", mode);
464 printf("bits per word: %u\n", bits);
465 printf("max speed: %u Hz (%u kHz)\n", speed, speed/1000);
466
467 if (input_tx)
468 transfer_escaped_string(fd, input_tx);
469 else if (input_file)
470 transfer_file(fd, input_file);
471 else if (transfer_size) {
472 struct timespec last_stat;
473
474 clock_gettime(CLOCK_MONOTONIC, &last_stat);
475
476 while (iterations-- > 0) {
477 struct timespec current;
478
479 transfer_buf(fd, transfer_size);
480
481 clock_gettime(CLOCK_MONOTONIC, ¤t);
482 if (current.tv_sec - last_stat.tv_sec > interval) {
483 show_transfer_rate();
484 last_stat = current;
485 }
486 }
487 printf("total: tx %.1fKB, rx %.1fKB\n",
488 _write_count/1024.0, _read_count/1024.0);
489 } else
490 transfer(fd, default_tx, default_rx, sizeof(default_tx));
491
492 close(fd);
493
494 return ret;
495}
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>
18#include <string.h>
19#include <getopt.h>
20#include <fcntl.h>
21#include <sys/ioctl.h>
22#include <linux/ioctl.h>
23#include <sys/stat.h>
24#include <linux/types.h>
25#include <linux/spi/spidev.h>
26
27#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
28
29static void pabort(const char *s)
30{
31 perror(s);
32 abort();
33}
34
35static const char *device = "/dev/spidev1.1";
36static uint32_t mode;
37static uint8_t bits = 8;
38static char *input_file;
39static char *output_file;
40static uint32_t speed = 500000;
41static uint16_t delay;
42static int verbose;
43
44uint8_t default_tx[] = {
45 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
46 0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
47 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
48 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
49 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
50 0xF0, 0x0D,
51};
52
53uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };
54char *input_tx;
55
56static void hex_dump(const void *src, size_t length, size_t line_size,
57 char *prefix)
58{
59 int i = 0;
60 const unsigned char *address = src;
61 const unsigned char *line = address;
62 unsigned char c;
63
64 printf("%s | ", prefix);
65 while (length-- > 0) {
66 printf("%02X ", *address++);
67 if (!(++i % line_size) || (length == 0 && i % line_size)) {
68 if (length == 0) {
69 while (i++ % line_size)
70 printf("__ ");
71 }
72 printf(" | "); /* right close */
73 while (line < address) {
74 c = *line++;
75 printf("%c", (c < 33 || c == 255) ? 0x2E : c);
76 }
77 printf("\n");
78 if (length > 0)
79 printf("%s | ", prefix);
80 }
81 }
82}
83
84/*
85 * Unescape - process hexadecimal escape character
86 * converts shell input "\x23" -> 0x23
87 */
88static int unescape(char *_dst, char *_src, size_t len)
89{
90 int ret = 0;
91 int match;
92 char *src = _src;
93 char *dst = _dst;
94 unsigned int ch;
95
96 while (*src) {
97 if (*src == '\\' && *(src+1) == 'x') {
98 match = sscanf(src + 2, "%2x", &ch);
99 if (!match)
100 pabort("malformed input string");
101
102 src += 4;
103 *dst++ = (unsigned char)ch;
104 } else {
105 *dst++ = *src++;
106 }
107 ret++;
108 }
109 return ret;
110}
111
112static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
113{
114 int ret;
115 int out_fd;
116 struct spi_ioc_transfer tr = {
117 .tx_buf = (unsigned long)tx,
118 .rx_buf = (unsigned long)rx,
119 .len = len,
120 .delay_usecs = delay,
121 .speed_hz = speed,
122 .bits_per_word = bits,
123 };
124
125 if (mode & SPI_TX_QUAD)
126 tr.tx_nbits = 4;
127 else if (mode & SPI_TX_DUAL)
128 tr.tx_nbits = 2;
129 if (mode & SPI_RX_QUAD)
130 tr.rx_nbits = 4;
131 else if (mode & SPI_RX_DUAL)
132 tr.rx_nbits = 2;
133 if (!(mode & SPI_LOOP)) {
134 if (mode & (SPI_TX_QUAD | SPI_TX_DUAL))
135 tr.rx_buf = 0;
136 else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL))
137 tr.tx_buf = 0;
138 }
139
140 ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
141 if (ret < 1)
142 pabort("can't send spi message");
143
144 if (verbose)
145 hex_dump(tx, len, 32, "TX");
146
147 if (output_file) {
148 out_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC, 0666);
149 if (out_fd < 0)
150 pabort("could not open output file");
151
152 ret = write(out_fd, rx, len);
153 if (ret != len)
154 pabort("not all bytes written to output file");
155
156 close(out_fd);
157 }
158
159 if (verbose || !output_file)
160 hex_dump(rx, len, 32, "RX");
161}
162
163static void print_usage(const char *prog)
164{
165 printf("Usage: %s [-DsbdlHOLC3]\n", prog);
166 puts(" -D --device device to use (default /dev/spidev1.1)\n"
167 " -s --speed max speed (Hz)\n"
168 " -d --delay delay (usec)\n"
169 " -b --bpw bits per word\n"
170 " -i --input input data from a file (e.g. \"test.bin\")\n"
171 " -o --output output data to a file (e.g. \"results.bin\")\n"
172 " -l --loop loopback\n"
173 " -H --cpha clock phase\n"
174 " -O --cpol clock polarity\n"
175 " -L --lsb least significant bit first\n"
176 " -C --cs-high chip select active high\n"
177 " -3 --3wire SI/SO signals shared\n"
178 " -v --verbose Verbose (show tx buffer)\n"
179 " -p Send data (e.g. \"1234\\xde\\xad\")\n"
180 " -N --no-cs no chip select\n"
181 " -R --ready slave pulls low to pause\n"
182 " -2 --dual dual transfer\n"
183 " -4 --quad quad transfer\n");
184 exit(1);
185}
186
187static void parse_opts(int argc, char *argv[])
188{
189 while (1) {
190 static const struct option lopts[] = {
191 { "device", 1, 0, 'D' },
192 { "speed", 1, 0, 's' },
193 { "delay", 1, 0, 'd' },
194 { "bpw", 1, 0, 'b' },
195 { "input", 1, 0, 'i' },
196 { "output", 1, 0, 'o' },
197 { "loop", 0, 0, 'l' },
198 { "cpha", 0, 0, 'H' },
199 { "cpol", 0, 0, 'O' },
200 { "lsb", 0, 0, 'L' },
201 { "cs-high", 0, 0, 'C' },
202 { "3wire", 0, 0, '3' },
203 { "no-cs", 0, 0, 'N' },
204 { "ready", 0, 0, 'R' },
205 { "dual", 0, 0, '2' },
206 { "verbose", 0, 0, 'v' },
207 { "quad", 0, 0, '4' },
208 { NULL, 0, 0, 0 },
209 };
210 int c;
211
212 c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR24p:v",
213 lopts, NULL);
214
215 if (c == -1)
216 break;
217
218 switch (c) {
219 case 'D':
220 device = optarg;
221 break;
222 case 's':
223 speed = atoi(optarg);
224 break;
225 case 'd':
226 delay = atoi(optarg);
227 break;
228 case 'b':
229 bits = atoi(optarg);
230 break;
231 case 'i':
232 input_file = optarg;
233 break;
234 case 'o':
235 output_file = optarg;
236 break;
237 case 'l':
238 mode |= SPI_LOOP;
239 break;
240 case 'H':
241 mode |= SPI_CPHA;
242 break;
243 case 'O':
244 mode |= SPI_CPOL;
245 break;
246 case 'L':
247 mode |= SPI_LSB_FIRST;
248 break;
249 case 'C':
250 mode |= SPI_CS_HIGH;
251 break;
252 case '3':
253 mode |= SPI_3WIRE;
254 break;
255 case 'N':
256 mode |= SPI_NO_CS;
257 break;
258 case 'v':
259 verbose = 1;
260 break;
261 case 'R':
262 mode |= SPI_READY;
263 break;
264 case 'p':
265 input_tx = optarg;
266 break;
267 case '2':
268 mode |= SPI_TX_DUAL;
269 break;
270 case '4':
271 mode |= SPI_TX_QUAD;
272 break;
273 default:
274 print_usage(argv[0]);
275 break;
276 }
277 }
278 if (mode & SPI_LOOP) {
279 if (mode & SPI_TX_DUAL)
280 mode |= SPI_RX_DUAL;
281 if (mode & SPI_TX_QUAD)
282 mode |= SPI_RX_QUAD;
283 }
284}
285
286static void transfer_escaped_string(int fd, char *str)
287{
288 size_t size = strlen(str);
289 uint8_t *tx;
290 uint8_t *rx;
291
292 tx = malloc(size);
293 if (!tx)
294 pabort("can't allocate tx buffer");
295
296 rx = malloc(size);
297 if (!rx)
298 pabort("can't allocate rx buffer");
299
300 size = unescape((char *)tx, str, size);
301 transfer(fd, tx, rx, size);
302 free(rx);
303 free(tx);
304}
305
306static void transfer_file(int fd, char *filename)
307{
308 ssize_t bytes;
309 struct stat sb;
310 int tx_fd;
311 uint8_t *tx;
312 uint8_t *rx;
313
314 if (stat(filename, &sb) == -1)
315 pabort("can't stat input file");
316
317 tx_fd = open(filename, O_RDONLY);
318 if (tx_fd < 0)
319 pabort("can't open input file");
320
321 tx = malloc(sb.st_size);
322 if (!tx)
323 pabort("can't allocate tx buffer");
324
325 rx = malloc(sb.st_size);
326 if (!rx)
327 pabort("can't allocate rx buffer");
328
329 bytes = read(tx_fd, tx, sb.st_size);
330 if (bytes != sb.st_size)
331 pabort("failed to read input file");
332
333 transfer(fd, tx, rx, sb.st_size);
334 free(rx);
335 free(tx);
336 close(tx_fd);
337}
338
339int main(int argc, char *argv[])
340{
341 int ret = 0;
342 int fd;
343
344 parse_opts(argc, argv);
345
346 fd = open(device, O_RDWR);
347 if (fd < 0)
348 pabort("can't open device");
349
350 /*
351 * spi mode
352 */
353 ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
354 if (ret == -1)
355 pabort("can't set spi mode");
356
357 ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
358 if (ret == -1)
359 pabort("can't get spi mode");
360
361 /*
362 * bits per word
363 */
364 ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
365 if (ret == -1)
366 pabort("can't set bits per word");
367
368 ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
369 if (ret == -1)
370 pabort("can't get bits per word");
371
372 /*
373 * max speed hz
374 */
375 ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
376 if (ret == -1)
377 pabort("can't set max speed hz");
378
379 ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
380 if (ret == -1)
381 pabort("can't get max speed hz");
382
383 printf("spi mode: 0x%x\n", mode);
384 printf("bits per word: %d\n", bits);
385 printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
386
387 if (input_tx && input_file)
388 pabort("only one of -p and --input may be selected");
389
390 if (input_tx)
391 transfer_escaped_string(fd, input_tx);
392 else if (input_file)
393 transfer_file(fd, input_file);
394 else
395 transfer(fd, default_tx, default_rx, sizeof(default_tx));
396
397 close(fd);
398
399 return ret;
400}