1 // SPDX-License-Identifier: GPL-2.0-only
12  * generic_buffer -n <device_name> -t <trigger_name>
13  * If trigger name is not specified the program assumes you want a dataready
14  * trigger associated with the device and goes looking for it.
38  * enum autochan - state for the automatic channel enabling mechanism
47  * size_from_channelarray() - calculate the storage size of a scan
66 			channels[i].location = bytes - bytes % channels[i].bytes  in size_from_channelarray()
79 		bytes += max - misalignment;  in size_from_channelarray()
90 	input >>= info->shift;  in print1byte()
91 	input &= info->mask;  in print1byte()
92 	if (info->is_signed) {  in print1byte()
93 		int8_t val = (int8_t)(input << (8 - info->bits_used)) >>  in print1byte()
94 			     (8 - info->bits_used);  in print1byte()
95 		printf("%05f ", ((float)val + info->offset) * info->scale);  in print1byte()
97 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print1byte()
104 	if (info->be)  in print2byte()
113 	input >>= info->shift;  in print2byte()
114 	input &= info->mask;  in print2byte()
115 	if (info->is_signed) {  in print2byte()
116 		int16_t val = (int16_t)(input << (16 - info->bits_used)) >>  in print2byte()
117 			      (16 - info->bits_used);  in print2byte()
118 		printf("%05f ", ((float)val + info->offset) * info->scale);  in print2byte()
120 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print2byte()
127 	if (info->be)  in print4byte()
136 	input >>= info->shift;  in print4byte()
137 	input &= info->mask;  in print4byte()
138 	if (info->is_signed) {  in print4byte()
139 		int32_t val = (int32_t)(input << (32 - info->bits_used)) >>  in print4byte()
140 			      (32 - info->bits_used);  in print4byte()
141 		printf("%05f ", ((float)val + info->offset) * info->scale);  in print4byte()
143 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print4byte()
150 	if (info->be)  in print8byte()
159 	input >>= info->shift;  in print8byte()
160 	input &= info->mask;  in print8byte()
161 	if (info->is_signed) {  in print8byte()
162 		int64_t val = (int64_t)(input << (64 - info->bits_used)) >>  in print8byte()
163 			      (64 - info->bits_used);  in print8byte()
165 		if (info->scale == 1.0f && info->offset == 0.0f)  in print8byte()
169 			       ((float)val + info->offset) * info->scale);  in print8byte()
171 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print8byte()
176  * process_scan() - print out the values in SI units
222 	scanelemdir[sizeof(scanelemdir)-1] = '\0';  in enable_disable_all_channels()
228 		return -EIO;  in enable_disable_all_channels()
231 	ret = -ENOENT;  in enable_disable_all_channels()
233 		if (iioutils_check_suffix(ent->d_name, "_en")) {  in enable_disable_all_channels()
236 			       ent->d_name);  in enable_disable_all_channels()
237 			ret = write_sysfs_int(ent->d_name, scanelemdir,  in enable_disable_all_channels()
241 					ent->d_name);  in enable_disable_all_channels()
245 	if (closedir(dp) == -1) {  in enable_disable_all_channels()
248 		return -errno;  in enable_disable_all_channels()
257 		"  -a         Auto-activate all available channels\n"  in print_usage()
258 		"  -A         Force-activate ALL channels\n"  in print_usage()
259 		"  -b <n>     The buffer which to open (by index), default 0\n"  in print_usage()
260 		"  -c <n>     Do n conversions, or loop forever if n < 0\n"  in print_usage()
261 		"  -e         Disable wait for event (new data)\n"  in print_usage()
262 		"  -g         Use trigger-less mode\n"  in print_usage()
263 		"  -l <n>     Set buffer length to n samples\n"  in print_usage()
264 		"  --device-name -n <name>\n"  in print_usage()
265 		"  --device-num -N <num>\n"  in print_usage()
266 		"        Set device by name or number (mandatory)\n"  in print_usage()
267 		"  --trigger-name -t <name>\n"  in print_usage()
268 		"  --trigger-num -T <num>\n"  in print_usage()
269 		"        Set trigger by name or number\n"  in print_usage()
270 		"  -w <n>     Set delay between reads in us (event-less mode)\n");  in print_usage()
283 	/* Disable trigger */  in cleanup()
285 		/* Disconnect the trigger - just write a dummy name. */  in cleanup()
286 		ret = write_sysfs_string("trigger/current_trigger",  in cleanup()
289 			fprintf(stderr, "Failed to disable trigger: %s\n",  in cleanup()
290 				strerror(-ret));  in cleanup()
299 				strerror(-ret));  in cleanup()
302 	/* Disable channels if auto-enabled */  in cleanup()
315 	exit(-signum);  in sig_handler()
328 			exit(-1);  in register_cleanup()
334 	{ "device-name",	1, 0, 'n' },
335 	{ "device-num",		1, 0, 'N' },
336 	{ "trigger-name",	1, 0, 't' },
337 	{ "trigger-num",	1, 0, 'T' },
352 	int fd = -1;  in main()
353 	int buf_fd = -1;  in main()
360 	int dev_num = -1, trig_num = -1;  in main()
373 				NULL)) != -1) {  in main()
386 				ret = -errno;  in main()
390 				ret = -ERANGE;  in main()
399 				ret = -errno;  in main()
414 				ret = -errno;  in main()
426 				ret = -errno;  in main()
437 				return -errno;  in main()
443 				ret = -errno;  in main()
449 			ret = -1;  in main()
458 		ret = -1;  in main()
461 		fprintf(stderr, "Only one of --device-num or --device-name needs to be set\n");  in main()
463 		ret = -1;  in main()
477 		return -ENOMEM;  in main()
482 			ret = -ENOMEM;  in main()
485 		ret = read_sysfs_string("name", dev_dir_name, device_name);  in main()
487 			fprintf(stderr, "Failed to read name of device %d\n", dev_num);  in main()
493 		printf("trigger-less mode selected\n");  in main()
498 			return -ENOMEM;  in main()
502 			ret = -ENOMEM;  in main()
505 		ret = read_sysfs_string("name", trig_dev_name, trigger_name);  in main()
508 			fprintf(stderr, "Failed to read trigger%d name from\n", trig_num);  in main()
511 		printf("iio trigger number being used is %d\n", trig_num);  in main()
515 			 * Build the trigger name. If it is device associated  in main()
516 			 * its name is <device_name>_dev[n] where n matches  in main()
520 				       "%s-dev%d", device_name, dev_num);  in main()
522 				ret = -ENOMEM;  in main()
527 		/* Look for this "-devN" trigger */  in main()
528 		trig_num = find_type_by_name(trigger_name, "trigger");  in main()
530 			/* OK try the simpler "-trigger" suffix instead */  in main()
533 				       "%s-trigger", device_name);  in main()
535 				ret = -ENOMEM;  in main()
540 		trig_num = find_type_by_name(trigger_name, "trigger");  in main()
542 			fprintf(stderr, "Failed to find the trigger %s\n",  in main()
548 		printf("iio trigger number being used is %d\n", trig_num);  in main()
563 		fprintf(stderr, "Auto-channels selected but some channels "  in main()
591 				"auto-enabling, giving up\n");  in main()
601 			"/*_en or pass -a to autoenable channels and "  in main()
603 		ret = -ENOENT;  in main()
608 	 * Construct the directory name for the associated buffer.  in main()
615 		ret = -ENOMEM;  in main()
622 		ret = -errno;  in main()
628 		ret = -EFAULT;  in main()
635 		 * Set the device trigger to be the data ready trigger found  in main()
638 		ret = write_sysfs_string_and_verify("trigger/current_trigger",  in main()
650 		ret = -ENOMEM;  in main()
656 	if (fd == -1) { /* TODO: If it isn't there make the node */  in main()
657 		ret = -errno;  in main()
666 	if (ret == -1 || buf_fd == -1) {  in main()
667 		ret = -errno;  in main()
668 		if (ret == -ENODEV || ret == -EINVAL)  in main()
687 			buf_dir_name, strerror(-ret));  in main()
696 		ret = -EFAULT;  in main()
703 		ret = -ENOMEM;  in main()
715 		if (read_size > -1 || errno != EBUSY) {  in main()
716 			ret = -EFAULT;  in main()
723 	if (close(fd) == -1)  in main()
725 	fd = -1;  in main()
734 			ret = poll(&pfd, 1, -1);  in main()
736 				ret = -errno;  in main()
765 	if (fd >= 0 && close(fd) == -1)  in main()
767 	if (buf_fd >= 0 && close(buf_fd) == -1)  in main()
772 	for (i = num_channels - 1; i >= 0; i--) {  in main()
773 		free(channels[i].name);  in main()