1 // SPDX-License-Identifier: GPL-2.0-only
8  * Cross-compile with cross-gcc -I/path/to/cross-kernel/include
43 static uint32_t speed = 500000;  variable
71 	while (length-- > 0) {  in hex_dump()
91  *  Unescape - process hexadecimal escape character
92  *      converts shell input "\x23" -> 0x23
127 		.speed_hz = speed,  in transfer()
175 	printf("Usage: %s [-2348CDFHILMNORSZbdilopsv]\n", prog);  in print_usage()
177 		 "  -D --device         device to use (default /dev/spidev1.1)\n"  in print_usage()
178 		 "  -s --speed          max speed (Hz)\n"  in print_usage()
179 		 "  -d --delay          delay (usec)\n"  in print_usage()
180 		 "  -l --loop           loopback\n"  in print_usage()
182 		 "  -H --cpha           clock phase\n"  in print_usage()
183 		 "  -O --cpol           clock polarity\n"  in print_usage()
184 		 "  -F --rx-cpha-flip   flip CPHA on Rx only xfer\n"  in print_usage()
186 		 "  -2 --dual           dual transfer\n"  in print_usage()
187 		 "  -4 --quad           quad transfer\n"  in print_usage()
188 		 "  -8 --octal          octal transfer\n"  in print_usage()
189 		 "  -3 --3wire          SI/SO signals shared\n"  in print_usage()
190 		 "  -Z --3wire-hiz      high impedance turnaround\n"  in print_usage()
192 		 "  -i --input          input data from a file (e.g. \"test.bin\")\n"  in print_usage()
193 		 "  -o --output         output data to a file (e.g. \"results.bin\")\n"  in print_usage()
194 		 "  -p                  Send data (e.g. \"1234\\xde\\xad\")\n"  in print_usage()
195 		 "  -S --size           transfer size\n"  in print_usage()
196 		 "  -I --iter           iterations\n"  in print_usage()
198 		 "  -b --bpw            bits per word\n"  in print_usage()
199 		 "  -L --lsb            least significant bit first\n"  in print_usage()
200 		 "  -C --cs-high        chip select active high\n"  in print_usage()
201 		 "  -N --no-cs          no chip select\n"  in print_usage()
202 		 "  -R --ready          slave pulls low to pause\n"  in print_usage()
203 		 "  -M --mosi-idle-low  leave mosi line low when idle\n"  in print_usage()
205 		 "  -v --verbose        Verbose (show tx buffer)\n");  in print_usage()
214 			{ "speed",         1, 0, 's' },  in parse_opts()
219 			{ "rx-cpha-flip",  0, 0, 'F' },  in parse_opts()
224 			{ "3wire-hiz",     0, 0, 'Z' },  in parse_opts()
231 			{ "cs-high",       0, 0, 'C' },  in parse_opts()
232 			{ "no-cs",         0, 0, 'N' },  in parse_opts()
234 			{ "mosi-idle-low", 0, 0, 'M' },  in parse_opts()
243 		if (c == -1)  in parse_opts()
251 			speed = atoi(optarg);  in parse_opts()
361 	if (stat(filename, &sb) == -1)  in transfer_file()
394 	rx_rate = ((_read_count - prev_read_count) * 8) / (interval*1000.0);  in show_transfer_rate()
395 	tx_rate = ((_write_count - prev_write_count) * 8) / (interval*1000.0);  in show_transfer_rate()
446 		pabort("only one of -p and --input may be selected");  in main()
458 	if (ret == -1)  in main()
463 	if (ret == -1)  in main()
477 	if (ret == -1)  in main()
481 	if (ret == -1)  in main()
485 	 * max speed hz  in main()
487 	ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);  in main()
488 	if (ret == -1)  in main()
489 		pabort("can't set max speed hz");  in main()
491 	ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);  in main()
492 	if (ret == -1)  in main()
493 		pabort("can't get max speed hz");  in main()
497 	printf("max speed: %u Hz (%u kHz)\n", speed, speed/1000);  in main()
508 		while (iterations-- > 0) {  in main()
514 			if (current.tv_sec - last_stat.tv_sec > interval) {  in main()