Commit | Line | Data |
---|---|---|
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> | |
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 | ||
cd58310d | 33 | static const char *device = "/dev/spidev1.1"; |
c2e78c34 | 34 | static uint32_t mode; |
22b238bd AV |
35 | static uint8_t bits = 8; |
36 | static uint32_t speed = 500000; | |
37 | static uint16_t delay; | |
31a5c5a7 | 38 | static int verbose; |
22b238bd | 39 | |
30061915 AR |
40 | uint8_t default_tx[] = { |
41 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
42 | 0x40, 0x00, 0x00, 0x00, 0x00, 0x95, | |
43 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
44 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
45 | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, | |
46 | 0xF0, 0x0D, | |
47 | }; | |
48 | ||
49 | uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, }; | |
50 | char *input_tx; | |
51 | ||
b78ce7ed AR |
52 | static void hex_dump(const void *src, size_t length, size_t line_size, char *prefix) |
53 | { | |
54 | int i = 0; | |
55 | const unsigned char *address = src; | |
56 | const unsigned char *line = address; | |
57 | unsigned char c; | |
58 | ||
59 | printf("%s | ", prefix); | |
60 | while (length-- > 0) { | |
61 | printf("%02X ", *address++); | |
62 | if (!(++i % line_size) || (length == 0 && i % line_size)) { | |
63 | if (length == 0) { | |
64 | while (i++ % line_size) | |
65 | printf("__ "); | |
66 | } | |
67 | printf(" | "); /* right close */ | |
68 | while (line < address) { | |
69 | c = *line++; | |
70 | printf("%c", (c < 33 || c == 255) ? 0x2E : c); | |
71 | } | |
72 | printf("\n"); | |
73 | if (length > 0) | |
74 | printf("%s | ", prefix); | |
75 | } | |
76 | } | |
77 | } | |
78 | ||
30061915 AR |
79 | /* |
80 | * Unescape - process hexadecimal escape character | |
81 | * converts shell input "\x23" -> 0x23 | |
82 | */ | |
83 | int unespcape(char *_dst, char *_src, size_t len) | |
84 | { | |
85 | int ret = 0; | |
86 | char *src = _src; | |
87 | char *dst = _dst; | |
88 | unsigned int ch; | |
89 | ||
90 | while (*src) { | |
91 | if (*src == '\\' && *(src+1) == 'x') { | |
92 | sscanf(src + 2, "%2x", &ch); | |
93 | src += 4; | |
94 | *dst++ = (unsigned char)ch; | |
95 | } else { | |
96 | *dst++ = *src++; | |
97 | } | |
98 | ret++; | |
99 | } | |
100 | return ret; | |
101 | } | |
102 | ||
103 | static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len) | |
22b238bd AV |
104 | { |
105 | int ret; | |
30061915 | 106 | |
22b238bd AV |
107 | struct spi_ioc_transfer tr = { |
108 | .tx_buf = (unsigned long)tx, | |
109 | .rx_buf = (unsigned long)rx, | |
30061915 | 110 | .len = len, |
22b238bd AV |
111 | .delay_usecs = delay, |
112 | .speed_hz = speed, | |
113 | .bits_per_word = bits, | |
114 | }; | |
115 | ||
c2e78c34 GU |
116 | if (mode & SPI_TX_QUAD) |
117 | tr.tx_nbits = 4; | |
118 | else if (mode & SPI_TX_DUAL) | |
119 | tr.tx_nbits = 2; | |
120 | if (mode & SPI_RX_QUAD) | |
121 | tr.rx_nbits = 4; | |
122 | else if (mode & SPI_RX_DUAL) | |
123 | tr.rx_nbits = 2; | |
124 | if (!(mode & SPI_LOOP)) { | |
125 | if (mode & (SPI_TX_QUAD | SPI_TX_DUAL)) | |
126 | tr.rx_buf = 0; | |
127 | else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL)) | |
128 | tr.tx_buf = 0; | |
129 | } | |
130 | ||
22b238bd | 131 | ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr); |
95b1ed2a | 132 | if (ret < 1) |
22b238bd AV |
133 | pabort("can't send spi message"); |
134 | ||
31a5c5a7 | 135 | if (verbose) |
30061915 AR |
136 | hex_dump(tx, len, 32, "TX"); |
137 | hex_dump(rx, len, 32, "RX"); | |
22b238bd AV |
138 | } |
139 | ||
b7ed698c | 140 | static void print_usage(const char *prog) |
22b238bd AV |
141 | { |
142 | printf("Usage: %s [-DsbdlHOLC3]\n", prog); | |
143 | puts(" -D --device device to use (default /dev/spidev1.1)\n" | |
144 | " -s --speed max speed (Hz)\n" | |
145 | " -d --delay delay (usec)\n" | |
146 | " -b --bpw bits per word \n" | |
147 | " -l --loop loopback\n" | |
148 | " -H --cpha clock phase\n" | |
149 | " -O --cpol clock polarity\n" | |
150 | " -L --lsb least significant bit first\n" | |
151 | " -C --cs-high chip select active high\n" | |
925d16a2 | 152 | " -3 --3wire SI/SO signals shared\n" |
31a5c5a7 | 153 | " -v --verbose Verbose (show tx buffer)\n" |
30061915 | 154 | " -p Send data (e.g. \"1234\\xde\\xad\")\n" |
925d16a2 | 155 | " -N --no-cs no chip select\n" |
c2e78c34 GU |
156 | " -R --ready slave pulls low to pause\n" |
157 | " -2 --dual dual transfer\n" | |
158 | " -4 --quad quad transfer\n"); | |
22b238bd AV |
159 | exit(1); |
160 | } | |
161 | ||
b7ed698c | 162 | static void parse_opts(int argc, char *argv[]) |
22b238bd AV |
163 | { |
164 | while (1) { | |
cd58310d | 165 | static const struct option lopts[] = { |
22b238bd AV |
166 | { "device", 1, 0, 'D' }, |
167 | { "speed", 1, 0, 's' }, | |
168 | { "delay", 1, 0, 'd' }, | |
169 | { "bpw", 1, 0, 'b' }, | |
170 | { "loop", 0, 0, 'l' }, | |
171 | { "cpha", 0, 0, 'H' }, | |
172 | { "cpol", 0, 0, 'O' }, | |
173 | { "lsb", 0, 0, 'L' }, | |
174 | { "cs-high", 0, 0, 'C' }, | |
175 | { "3wire", 0, 0, '3' }, | |
b55f627f DB |
176 | { "no-cs", 0, 0, 'N' }, |
177 | { "ready", 0, 0, 'R' }, | |
c2e78c34 | 178 | { "dual", 0, 0, '2' }, |
31a5c5a7 | 179 | { "verbose", 0, 0, 'v' }, |
c2e78c34 | 180 | { "quad", 0, 0, '4' }, |
22b238bd AV |
181 | { NULL, 0, 0, 0 }, |
182 | }; | |
183 | int c; | |
184 | ||
30061915 | 185 | c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24p:v", lopts, NULL); |
22b238bd AV |
186 | |
187 | if (c == -1) | |
188 | break; | |
189 | ||
190 | switch (c) { | |
191 | case 'D': | |
192 | device = optarg; | |
193 | break; | |
194 | case 's': | |
195 | speed = atoi(optarg); | |
196 | break; | |
197 | case 'd': | |
198 | delay = atoi(optarg); | |
199 | break; | |
200 | case 'b': | |
201 | bits = atoi(optarg); | |
202 | break; | |
203 | case 'l': | |
204 | mode |= SPI_LOOP; | |
205 | break; | |
206 | case 'H': | |
207 | mode |= SPI_CPHA; | |
208 | break; | |
209 | case 'O': | |
210 | mode |= SPI_CPOL; | |
211 | break; | |
212 | case 'L': | |
213 | mode |= SPI_LSB_FIRST; | |
214 | break; | |
215 | case 'C': | |
216 | mode |= SPI_CS_HIGH; | |
217 | break; | |
218 | case '3': | |
219 | mode |= SPI_3WIRE; | |
220 | break; | |
b55f627f DB |
221 | case 'N': |
222 | mode |= SPI_NO_CS; | |
223 | break; | |
31a5c5a7 AR |
224 | case 'v': |
225 | verbose = 1; | |
226 | break; | |
b55f627f DB |
227 | case 'R': |
228 | mode |= SPI_READY; | |
229 | break; | |
30061915 AR |
230 | case 'p': |
231 | input_tx = optarg; | |
232 | break; | |
c2e78c34 GU |
233 | case '2': |
234 | mode |= SPI_TX_DUAL; | |
235 | break; | |
236 | case '4': | |
237 | mode |= SPI_TX_QUAD; | |
238 | break; | |
22b238bd AV |
239 | default: |
240 | print_usage(argv[0]); | |
241 | break; | |
242 | } | |
243 | } | |
c2e78c34 GU |
244 | if (mode & SPI_LOOP) { |
245 | if (mode & SPI_TX_DUAL) | |
246 | mode |= SPI_RX_DUAL; | |
247 | if (mode & SPI_TX_QUAD) | |
248 | mode |= SPI_RX_QUAD; | |
249 | } | |
22b238bd AV |
250 | } |
251 | ||
252 | int main(int argc, char *argv[]) | |
253 | { | |
254 | int ret = 0; | |
255 | int fd; | |
30061915 AR |
256 | uint8_t *tx; |
257 | uint8_t *rx; | |
258 | int size; | |
22b238bd AV |
259 | |
260 | parse_opts(argc, argv); | |
261 | ||
262 | fd = open(device, O_RDWR); | |
263 | if (fd < 0) | |
264 | pabort("can't open device"); | |
265 | ||
266 | /* | |
267 | * spi mode | |
268 | */ | |
c2e78c34 | 269 | ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode); |
22b238bd AV |
270 | if (ret == -1) |
271 | pabort("can't set spi mode"); | |
272 | ||
c2e78c34 | 273 | ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode); |
22b238bd AV |
274 | if (ret == -1) |
275 | pabort("can't get spi mode"); | |
276 | ||
277 | /* | |
278 | * bits per word | |
279 | */ | |
280 | ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits); | |
281 | if (ret == -1) | |
282 | pabort("can't set bits per word"); | |
283 | ||
284 | ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits); | |
285 | if (ret == -1) | |
286 | pabort("can't get bits per word"); | |
287 | ||
288 | /* | |
289 | * max speed hz | |
290 | */ | |
291 | ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed); | |
292 | if (ret == -1) | |
293 | pabort("can't set max speed hz"); | |
294 | ||
295 | ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed); | |
296 | if (ret == -1) | |
297 | pabort("can't get max speed hz"); | |
298 | ||
c2e78c34 | 299 | printf("spi mode: 0x%x\n", mode); |
22b238bd AV |
300 | printf("bits per word: %d\n", bits); |
301 | printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000); | |
302 | ||
30061915 AR |
303 | if (input_tx) { |
304 | size = strlen(input_tx+1); | |
305 | tx = malloc(size); | |
306 | rx = malloc(size); | |
307 | size = unespcape((char *)tx, input_tx, size); | |
308 | transfer(fd, tx, rx, size); | |
309 | free(rx); | |
310 | free(tx); | |
311 | } else { | |
312 | transfer(fd, default_tx, default_rx, sizeof(default_tx)); | |
313 | } | |
22b238bd AV |
314 | |
315 | close(fd); | |
316 | ||
317 | return ret; | |
318 | } |