1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (C) 2008-2009 Semihalf, Michal Hajduk and Bartlomiej Sieka
60 	uint32_t	addr;  member
75 	fprintf(stderr, "usage: %s -a addr [-f device] [-d [r|w]] [-o offset] "  in usage()
76 	    "[-w [0|8|16|16LE|16BE]] [-c count] [-m [tr|ss|rs|no]] [-b] [-v]\n",  in usage()
78 	fprintf(stderr, "       %s -s [-f device] [-n skip_addr] -v\n",  in usage()
80 	fprintf(stderr, "       %s -r [-f device] -v\n", getprogname());  in usage()
168 			usage("Bad -n argument, expected (first) hex-digit");  in parse_skip()
171 			usage("Bad -n argument, expected (second) hex-digit");  in parse_skip()
174 			usage("Bad -n argument, (01..7f)");  in parse_skip()
181 		if (*p == '-') {  in parse_skip()
186 			usage("Bad -n argument, ([:|,|..|-])");  in parse_skip()
191 			usage("Bad -n argument, expected (first) hex-digit");  in parse_skip()
194 			usage("Bad -n argument, expected (second) hex-digit");  in parse_skip()
197 			usage("Bad -n argument, (01..7f)");  in parse_skip()
199 			usage("Bad -n argument, (end < start)");  in parse_skip()
230 			cmd.slave = u << 1;  in scan_bus()
240 				rdmsg.slave = u << 1;  in scan_bus()
265 			    "trying less-reliable read method.\n");  in scan_bus()
294 			return ("Invalid 8-bit offset\n");  in encode_offset()
300 		return ("Invalid 16-bit offset\n");  in encode_offset()
319 		cmd->count = i2c_opt.off_len;  in write_offset()
320 		cmd->buf = (void*)i2c_opt.off_buf;  in write_offset()
333 	cmd.slave = i2c_opt.addr;  in i2c_write()
401 	cmd.slave = i2c_opt.addr;  in i2c_read()
416 	cmd.slave = i2c_opt.addr | 1;  in i2c_read()
438  * i2c_rdwr_transfer() - use I2CRDWR to conduct a complete i2c transfer.
440  * Some i2c hardware is unable to provide direct control over START, REPEAT-
442  * START-<data>-STOP or START-<data>-REPEAT-START-<data>-STOP sequence as a
456 		msgp->flags = IIC_M_WR | IIC_M_NOSTOP;  in i2c_rdwr_transfer()
457 		msgp->slave = i2c_opt.addr;  in i2c_rdwr_transfer()
458 		msgp->buf   = i2c_opt.off_buf;  in i2c_rdwr_transfer()
459 		msgp->len   = i2c_opt.off_len;  in i2c_rdwr_transfer()
468 	 * a start; if we did an offset write above it'll be a repeat-start  in i2c_rdwr_transfer()
472 		msgp->flags = IIC_M_WR | flag;  in i2c_rdwr_transfer()
474 		msgp->flags = IIC_M_RD;  in i2c_rdwr_transfer()
475 	msgp->slave = i2c_opt.addr;  in i2c_rdwr_transfer()
476 	msgp->len   = i2c_opt.count;  in i2c_rdwr_transfer()
477 	msgp->buf   = i2c_buf;  in i2c_rdwr_transfer()
481 	xfer.nmsgs = msgp - msgs;  in i2c_rdwr_transfer()
483 	if (ioctl(fd, I2CRDWR, &xfer) == -1 )  in i2c_rdwr_transfer()
524 				if ((u % chunk_size) == chunk_size - 1)  in access_bus()
582 		return(-1);  in command_bus()
589 		return(-1);  in command_bus()
592 	i2c_opt.addr = strtoul(cmd, &cmd, 0);  in command_bus()
593 	if (i2c_opt.addr == 0 && errno == EINVAL) {  in command_bus()
595 		return(-1);  in command_bus()
597 	if (i2c_opt.addr < 1 || i2c_opt.addr > 0x7f) {  in command_bus()
598 		fprintf(stderr, "Invalid device (0x%x)\n", i2c_opt.addr);  in command_bus()
599 		return(-1);  in command_bus()
601 	i2c_opt.addr <<= 1;  in command_bus()
618 		return(-1);  in command_bus()
624 		return(-1);  in command_bus()
631 		return(-1);  in command_bus()
638 			return(-1);  in command_bus()
649 				return(-1);  in command_bus()
657 				return(-1);  in command_bus()
661 				return(-1);  in command_bus()
671 		if (fd == -1) {  in command_bus()
681 		return(-1);  in command_bus()
719 	while (argc-- > 0) {  in instruct_bus()
720 		if (argc == 0 && !strcmp(*argv, "-")) {  in instruct_bus()
750 		fd_cache[ch] = -1;  in main()
754 	i2c_opt.addr = 0;  in main()
765 	while ((ch = getopt(argc, argv, optflags)) != -1) {  in main()
772 				usage("Only one of [-a|-h|-r|-s]");  in main()
786 	case 0: usage("Pick one of [-a|-h|-i|-r|-s]"); break;  in main()
797 	while ((ch = getopt(argc, argv, optflags)) != -1) {  in main()
800 			i2c_opt.addr = strtoul(optarg, 0, 16);  in main()
801 			if (i2c_opt.addr == 0 && errno == EINVAL)  in main()
802 				usage("Bad -a argument (hex)");  in main()
803 			if (i2c_opt.addr == 0 || i2c_opt.addr > 0x7f)  in main()
804 				usage("Bad -a argument (01..7f)");  in main()
805 			i2c_opt.addr <<= 1;  in main()
813 				usage("Bad -c argument (decimal)");  in main()
817 				usage("Bad -d argument ([r|w])");  in main()
834 				usage("Bad -m argument ([no|ss|rs|tr])");  in main()
842 				usage("Bad -o argument (hex)");  in main()
853 			fprintf(stderr, "Illegal -%c option", ch);  in main()
857 	argc -= optind;  in main()
864 	/* Set default mode if option -m is not specified */  in main()
880 	if (fd == -1) {  in main()
889 			fprintf(stderr, "dev: %s, addr: 0x%x, r/w: %c, "  in main()
891 			    i2c_opt.addr >> 1, i2c_opt.dir, i2c_opt.off,  in main()