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1#include <stdio.h>
2#include <unistd.h>
3#include <stdlib.h>
4#include <fcntl.h>
5#include <string.h>
6
7#include <sys/ioctl.h>
8#include <sys/types.h>
9#include <sys/stat.h>
10
11#include <linux/types.h>
12#include <linux/spi/spidev.h>
13
14
15static int verbose;
16
17static void do_read(int fd, int len)
18{
19 unsigned char buf[32], *bp;
20 int status;
21
22 /* read at least 2 bytes, no more than 32 */
23 if (len < 2)
24 len = 2;
25 else if (len > sizeof(buf))
26 len = sizeof(buf);
27 memset(buf, 0, sizeof buf);
28
29 status = read(fd, buf, len);
30 if (status < 0) {
31 perror("read");
32 return;
33 }
34 if (status != len) {
35 fprintf(stderr, "short read\n");
36 return;
37 }
38
39 printf("read(%2d, %2d): %02x %02x,", len, status,
40 buf[0], buf[1]);
41 status -= 2;
42 bp = buf + 2;
43 while (status-- > 0)
44 printf(" %02x", *bp++);
45 printf("\n");
46}
47
48static void do_msg(int fd, int len)
49{
50 struct spi_ioc_transfer xfer[2];
51 unsigned char buf[32], *bp;
52 int status;
53
54 memset(xfer, 0, sizeof xfer);
55 memset(buf, 0, sizeof buf);
56
57 if (len > sizeof buf)
58 len = sizeof buf;
59
60 buf[0] = 0xaa;
61 xfer[0].tx_buf = (unsigned long)buf;
62 xfer[0].len = 1;
63
64 xfer[1].rx_buf = (unsigned long) buf;
65 xfer[1].len = len;
66
67 status = ioctl(fd, SPI_IOC_MESSAGE(2), xfer);
68 if (status < 0) {
69 perror("SPI_IOC_MESSAGE");
70 return;
71 }
72
73 printf("response(%2d, %2d): ", len, status);
74 for (bp = buf; len; len--)
75 printf(" %02x", *bp++);
76 printf("\n");
77}
78
79static void dumpstat(const char *name, int fd)
80{
81 __u8 lsb, bits;
82 __u32 mode, speed;
83
84 if (ioctl(fd, SPI_IOC_RD_MODE32, &mode) < 0) {
85 perror("SPI rd_mode");
86 return;
87 }
88 if (ioctl(fd, SPI_IOC_RD_LSB_FIRST, &lsb) < 0) {
89 perror("SPI rd_lsb_fist");
90 return;
91 }
92 if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) < 0) {
93 perror("SPI bits_per_word");
94 return;
95 }
96 if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) < 0) {
97 perror("SPI max_speed_hz");
98 return;
99 }
100
101 printf("%s: spi mode 0x%x, %d bits %sper word, %d Hz max\n",
102 name, mode, bits, lsb ? "(lsb first) " : "", speed);
103}
104
105int main(int argc, char **argv)
106{
107 int c;
108 int readcount = 0;
109 int msglen = 0;
110 int fd;
111 const char *name;
112
113 while ((c = getopt(argc, argv, "hm:r:v")) != EOF) {
114 switch (c) {
115 case 'm':
116 msglen = atoi(optarg);
117 if (msglen < 0)
118 goto usage;
119 continue;
120 case 'r':
121 readcount = atoi(optarg);
122 if (readcount < 0)
123 goto usage;
124 continue;
125 case 'v':
126 verbose++;
127 continue;
128 case 'h':
129 case '?':
130usage:
131 fprintf(stderr,
132 "usage: %s [-h] [-m N] [-r N] /dev/spidevB.D\n",
133 argv[0]);
134 return 1;
135 }
136 }
137
138 if ((optind + 1) != argc)
139 goto usage;
140 name = argv[optind];
141
142 fd = open(name, O_RDWR);
143 if (fd < 0) {
144 perror("open");
145 return 1;
146 }
147
148 dumpstat(name, fd);
149
150 if (msglen)
151 do_msg(fd, msglen);
152
153 if (readcount)
154 do_read(fd, readcount);
155
156 close(fd);
157 return 0;
158}
1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <unistd.h>
4#include <stdlib.h>
5#include <fcntl.h>
6#include <string.h>
7
8#include <sys/ioctl.h>
9#include <sys/types.h>
10#include <sys/stat.h>
11
12#include <linux/types.h>
13#include <linux/spi/spidev.h>
14
15
16static int verbose;
17
18static void do_read(int fd, int len)
19{
20 unsigned char buf[32], *bp;
21 int status;
22
23 /* read at least 2 bytes, no more than 32 */
24 if (len < 2)
25 len = 2;
26 else if (len > sizeof(buf))
27 len = sizeof(buf);
28 memset(buf, 0, sizeof buf);
29
30 status = read(fd, buf, len);
31 if (status < 0) {
32 perror("read");
33 return;
34 }
35 if (status != len) {
36 fprintf(stderr, "short read\n");
37 return;
38 }
39
40 printf("read(%2d, %2d): %02x %02x,", len, status,
41 buf[0], buf[1]);
42 status -= 2;
43 bp = buf + 2;
44 while (status-- > 0)
45 printf(" %02x", *bp++);
46 printf("\n");
47}
48
49static void do_msg(int fd, int len)
50{
51 struct spi_ioc_transfer xfer[2];
52 unsigned char buf[32], *bp;
53 int status;
54
55 memset(xfer, 0, sizeof xfer);
56 memset(buf, 0, sizeof buf);
57
58 if (len > sizeof buf)
59 len = sizeof buf;
60
61 buf[0] = 0xaa;
62 xfer[0].tx_buf = (unsigned long)buf;
63 xfer[0].len = 1;
64
65 xfer[1].rx_buf = (unsigned long) buf;
66 xfer[1].len = len;
67
68 status = ioctl(fd, SPI_IOC_MESSAGE(2), xfer);
69 if (status < 0) {
70 perror("SPI_IOC_MESSAGE");
71 return;
72 }
73
74 printf("response(%2d, %2d): ", len, status);
75 for (bp = buf; len; len--)
76 printf(" %02x", *bp++);
77 printf("\n");
78}
79
80static void dumpstat(const char *name, int fd)
81{
82 __u8 lsb, bits;
83 __u32 mode, speed;
84
85 if (ioctl(fd, SPI_IOC_RD_MODE32, &mode) < 0) {
86 perror("SPI rd_mode");
87 return;
88 }
89 if (ioctl(fd, SPI_IOC_RD_LSB_FIRST, &lsb) < 0) {
90 perror("SPI rd_lsb_fist");
91 return;
92 }
93 if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) < 0) {
94 perror("SPI bits_per_word");
95 return;
96 }
97 if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) < 0) {
98 perror("SPI max_speed_hz");
99 return;
100 }
101
102 printf("%s: spi mode 0x%x, %d bits %sper word, %u Hz max\n",
103 name, mode, bits, lsb ? "(lsb first) " : "", speed);
104}
105
106int main(int argc, char **argv)
107{
108 int c;
109 int readcount = 0;
110 int msglen = 0;
111 int fd;
112 const char *name;
113
114 while ((c = getopt(argc, argv, "hm:r:v")) != EOF) {
115 switch (c) {
116 case 'm':
117 msglen = atoi(optarg);
118 if (msglen < 0)
119 goto usage;
120 continue;
121 case 'r':
122 readcount = atoi(optarg);
123 if (readcount < 0)
124 goto usage;
125 continue;
126 case 'v':
127 verbose++;
128 continue;
129 case 'h':
130 case '?':
131usage:
132 fprintf(stderr,
133 "usage: %s [-h] [-m N] [-r N] /dev/spidevB.D\n",
134 argv[0]);
135 return 1;
136 }
137 }
138
139 if ((optind + 1) != argc)
140 goto usage;
141 name = argv[optind];
142
143 fd = open(name, O_RDWR);
144 if (fd < 0) {
145 perror("open");
146 return 1;
147 }
148
149 dumpstat(name, fd);
150
151 if (msglen)
152 do_msg(fd, msglen);
153
154 if (readcount)
155 do_read(fd, readcount);
156
157 close(fd);
158 return 0;
159}