1 // SPDX-License-Identifier: GPL-2.0-only
8  * Cross-compile with cross-gcc -I/path/to/cross-kernel/include
40 static uint8_t bits = 8;  variable
72 	while (length-- > 0) {  in hex_dump()
92  *  Unescape - process hexadecimal escape character
93  *      converts shell input "\x23" -> 0x23
130 		.bits_per_word = bits,  in transfer()
177 	printf("Usage: %s [-2348CDFHILMNORSZbdilopsvw]\n", prog);  in print_usage()
179 		 "  -D --device         device to use (default /dev/spidev1.1)\n"  in print_usage()
180 		 "  -s --speed          max speed (Hz)\n"  in print_usage()
181 		 "  -d --delay          delay (usec)\n"  in print_usage()
182 		 "  -w --word-delay     word delay (usec)\n"  in print_usage()
183 		 "  -l --loop           loopback\n"  in print_usage()
185 		 "  -H --cpha           clock phase\n"  in print_usage()
186 		 "  -O --cpol           clock polarity\n"  in print_usage()
187 		 "  -F --rx-cpha-flip   flip CPHA on Rx only xfer\n"  in print_usage()
189 		 "  -2 --dual           dual transfer\n"  in print_usage()
190 		 "  -4 --quad           quad transfer\n"  in print_usage()
191 		 "  -8 --octal          octal transfer\n"  in print_usage()
192 		 "  -3 --3wire          SI/SO signals shared\n"  in print_usage()
193 		 "  -Z --3wire-hiz      high impedance turnaround\n"  in print_usage()
195 		 "  -i --input          input data from a file (e.g. \"test.bin\")\n"  in print_usage()
196 		 "  -o --output         output data to a file (e.g. \"results.bin\")\n"  in print_usage()
197 		 "  -p                  Send data (e.g. \"1234\\xde\\xad\")\n"  in print_usage()
198 		 "  -S --size           transfer size\n"  in print_usage()
199 		 "  -I --iter           iterations\n"  in print_usage()
201 		 "  -b --bpw            bits per word\n"  in print_usage()
202 		 "  -L --lsb            least significant bit first\n"  in print_usage()
203 		 "  -C --cs-high        chip select active high\n"  in print_usage()
204 		 "  -N --no-cs          no chip select\n"  in print_usage()
205 		 "  -R --ready          slave pulls low to pause\n"  in print_usage()
206 		 "  -M --mosi-idle-low  leave mosi line low when idle\n"  in print_usage()
208 		 "  -v --verbose        Verbose (show tx buffer)\n");  in print_usage()
219 			{ "word-delay",    1, 0, 'w' },  in parse_opts()
223 			{ "rx-cpha-flip",  0, 0, 'F' },  in parse_opts()
228 			{ "3wire-hiz",     0, 0, 'Z' },  in parse_opts()
235 			{ "cs-high",       0, 0, 'C' },  in parse_opts()
236 			{ "no-cs",         0, 0, 'N' },  in parse_opts()
238 			{ "mosi-idle-low", 0, 0, 'M' },  in parse_opts()
247 		if (c == -1)  in parse_opts()
264 			bits = atoi(optarg);  in parse_opts()
368 	if (stat(filename, &sb) == -1)  in transfer_file()
401 	rx_rate = ((_read_count - prev_read_count) * 8) / (interval*1000.0);  in show_transfer_rate()
402 	tx_rate = ((_write_count - prev_write_count) * 8) / (interval*1000.0);  in show_transfer_rate()
453 		pabort("only one of -p and --input may be selected");  in main()
465 	if (ret == -1)  in main()
470 	if (ret == -1)  in main()
472 	/* Drivers can reject some mode bits without returning an error.  in main()
481 	 * bits per word  in main()
483 	ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);  in main()
484 	if (ret == -1)  in main()
485 		pabort("can't set bits per word");  in main()
487 	ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);  in main()
488 	if (ret == -1)  in main()
489 		pabort("can't get bits per word");  in main()
492 	 * max speed hz  in main()
495 	if (ret == -1)  in main()
496 		pabort("can't set max speed hz");  in main()
499 	if (ret == -1)  in main()
500 		pabort("can't get max speed hz");  in main()
503 	printf("bits per word: %u\n", bits);  in main()
504 	printf("max speed: %u Hz (%u kHz)\n", speed, speed/1000);  in main()
515 		while (iterations-- > 0) {  in main()
521 			if (current.tv_sec - last_stat.tv_sec > interval) {  in main()