4  * Copyright (c) 2018 S.F.T. Inc.
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
13  *    documentation and/or other materials provided with the distribution.
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25  * SUCH DAMAGE.
28 #include <sys/types.h>
29 #include <sys/ioccom.h>
30 #include <sys/spigenio.h>
31 #include <sys/sysctl.h>
33 #include <errno.h>
34 #include <fcntl.h>
35 #include <inttypes.h>
36 #include <limits.h>
37 #include <memory.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <string.h>
42 #include <unistd.h>
44 #define	DEFAULT_DEVICE_NAME	"/dev/spigen0.0"
59 				 * ASCII output when ASCII != 0 */
60 	int	ASCII;		/* zero for binary input and output.  member
61 				 * non-zero for ASCII input, 'binary'
85  * LSB array - reversebits[n] is the LSB value of n as an MSB.  Use this array
131 	      "        spi [-f device] [-d r|w|rw] [-m mode] [-s max-speed] [-c count]\n"  in usage()
136 	      "        -f specifies the device (default is spigen0.0)\n"  in usage()
137 	      "        -d specifies the operation (r, w, or rw; default is rw)\n"  in usage()
140 	      "        -c specifies the number of data bytes to transfer (default 0, i.e. none)\n"  in usage()
146 	      "        -A uses ASCII for input/output as 2-digit hex values\n"  in usage()
151 	      "NOTE:  setting the mode and/or speed is 'sticky'.  Subsequent transactions\n"  in usage()
152 	      "       on that device will, by default, use the previously set values.\n"  in usage()
173 	opt.mode = -1;  in main()
174 	opt.speed = -1;  in main()
175 	opt.count = 0;  in main()
176 	opt.ASCII = 0;  in main()
177 	opt.binary = 0;  in main()
178 	opt.lsb = 0;  in main()
179 	opt.verbose = 0;  in main()
180 	opt.ncmd = 0;  in main()
181 	opt.pcmd = NULL;  in main()
183 	while (!err && (ch = getopt(argc, argv, "f:d:m:s:c:C:AbLvih")) != -1) {  in main()
185 		case 'd':  in main()
218 			opt.mode = (int)strtol(optarg, &pstr, 10);  in main()
220 			if (!pstr || *pstr || opt.mode < 0 || opt.mode > 3) {  in main()
228 			opt.speed = (int)strtol(optarg, &pstr, 10);  in main()
230 			if (!pstr || *pstr || opt.speed < 0) {  in main()
238 			opt.count = (int)strtol(optarg, &pstr, 10);  in main()
248 			if(opt.pcmd) /* specified more than once */  in main()
251 				/* get malloc'd buffer or error */  in main()
259 			opt.ASCII = 1;  in main()
263 			opt.binary = 1;  in main()
267 			opt.lsb = 1;  in main()
271 			opt.verbose++;  in main()
291 	    (fdir == DIR_NONE && !finfo && opt.mode == -1 && opt.speed == -1 && opt.count == 0)) {  in main()
301 	if ((opt.count != 0 || opt.ncmd != 0) && fdir == DIR_NONE) {  in main()
303 		 * count was specified, but direction was not.  default is  in main()
310 		if (opt.count == 0)  in main()
316 	if (opt.count < 0 && fdir != DIR_READWRITE && fdir != DIR_WRITE) {  in main()
317 		fprintf(stderr, "Invalid length %d when not writing data\n",  in main()
318 		    opt.count);  in main()
332 		fprintf(stderr, "Error - unable to open '%s', errno=%d\n",  in main()
345 	if (opt.mode != -1) {  in main()
352 	if (opt.speed != -1) {  in main()
376 	free(opt.pcmd);  in main()
430 					"Not enough memory to interpret command bytes, errno=%d\n",  in interpret_command_bytes()
475 		        "Device mode:   %d\n"  in get_info()
476 		        "Device speed:  %d\n",  in get_info()
480 		fprintf(stderr, "Unable to query info (err=%d), errno=%d\n",  in get_info()
560 	 * read up to 'cbdata' bytes.  If I get an EOF, do one of two things:  in prep_write_buffer()
568 		if (popt->ASCII) {  in prep_write_buffer()
627 		if (popt->ASCII)  in prep_write_buffer()
628 			fprintf(stderr, "ASCII input of %zd %s\n", cbread,  in prep_write_buffer()
636 	 * if opt.count is negative, copy actual byte count to opt.count which does  in prep_write_buffer()
637 	 * not include any of the 'command' bytes that are being sent.  Can be zero.  in prep_write_buffer()
653 	 * 'popt->ncmd' command bytes (if any).  in prep_write_buffer()
655 	 * the code.  in prep_write_buffer()
664 		fprintf(stderr, "Writing %d %s to SPI device\n",  in prep_write_buffer()
692 	spi.st_command.iov_base = bufr;  in _read_write()
693 	spi.st_command.iov_len = cbrw;  in _read_write()
696 	 * The remaining members for spi.st_data are zero - all bytes are  in _read_write()
697 	 * 'command' for this. The driver doesn't really do anything different  in _read_write()
699 	 * the transaction.  in _read_write()
713 		fprintf(stderr, "Error performing SPI transaction, errno=%d\n",  in _read_write()
745 	if (popt->binary || !popt->ASCII) {  in _do_data_output()
747 			fprintf(stderr, "Binary output of %d %s\n", icount,  in _do_data_output()
754 			fprintf(stderr, "ASCII output of %d %s\n", icount,  in _do_data_output()
757 		/* ASCII output */  in _do_data_output()
777 		fprintf(stderr, "Error writing to stdout, errno=%d\n", errno);  in _do_data_output()
780 		    "%d command %s and %d data %s read from SPI device\n",  in _do_data_output()
904 	fputs("        |  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F "  in verbose_dump_buffer()
944 				fputc('.', stderr);  in verbose_dump_buffer()