1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) 2022 Rockchip Electronics Co. Ltd.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <errno.h>
7*4882a593Smuzhiyun #include <fcntl.h>
8*4882a593Smuzhiyun #include <stdio.h>
9*4882a593Smuzhiyun #include <stdlib.h>
10*4882a593Smuzhiyun #include <stdint.h>
11*4882a593Smuzhiyun #include <string.h>
12*4882a593Smuzhiyun #include <unistd.h>
13*4882a593Smuzhiyun #include <sys/ioctl.h>
14*4882a593Smuzhiyun #include <sys/mman.h>
15*4882a593Smuzhiyun #include <sys/types.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include "../../../../include/uapi/linux/rk-iomux.h"
18*4882a593Smuzhiyun
rk_iomux_ioctl_set(int fd,int bank,int pin,int mux)19*4882a593Smuzhiyun static int rk_iomux_ioctl_set(int fd, int bank, int pin, int mux)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct iomux_ioctl_data data = {
22*4882a593Smuzhiyun .bank = bank,
23*4882a593Smuzhiyun .pin = pin,
24*4882a593Smuzhiyun .mux = mux,
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun int ret;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun if (!fd)
29*4882a593Smuzhiyun return -EINVAL;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun ret = ioctl(fd, IOMUX_IOC_MUX_SET, &data);
32*4882a593Smuzhiyun if (ret < 0) {
33*4882a593Smuzhiyun perror("fail to ioctl");
34*4882a593Smuzhiyun return ret;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun return 0;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
rk_iomux_ioctl_get(int fd,int bank,int pin,int * mux)40*4882a593Smuzhiyun static int rk_iomux_ioctl_get(int fd, int bank, int pin, int *mux)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun struct iomux_ioctl_data data = {
43*4882a593Smuzhiyun .bank = bank,
44*4882a593Smuzhiyun .pin = pin,
45*4882a593Smuzhiyun };
46*4882a593Smuzhiyun int ret;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun if (!fd)
49*4882a593Smuzhiyun return -EINVAL;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun ret = ioctl(fd, IOMUX_IOC_MUX_GET, &data);
52*4882a593Smuzhiyun if (ret < 0) {
53*4882a593Smuzhiyun perror("fail to ioctl");
54*4882a593Smuzhiyun return ret;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun *mux = data.mux;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
usage(void)61*4882a593Smuzhiyun static void usage(void)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun printf("%s:\n"
64*4882a593Smuzhiyun "set iomux:\n"
65*4882a593Smuzhiyun "iomux [bank index] [pin index] [mux value]\n"
66*4882a593Smuzhiyun "get iomux:\n"
67*4882a593Smuzhiyun "iomux [bank index] [pin index]\n",
68*4882a593Smuzhiyun __func__);
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
main(int argc,char * argv[])71*4882a593Smuzhiyun int main(int argc, char *argv[])
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun const char *name = "/dev/iomux";
74*4882a593Smuzhiyun int fd;
75*4882a593Smuzhiyun int bank, pin, mux;
76*4882a593Smuzhiyun int ret;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun if ((argc != 3) && (argc != 4)) {
79*4882a593Smuzhiyun usage();
80*4882a593Smuzhiyun return -1;
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun bank = atoi(argv[1]);
84*4882a593Smuzhiyun pin = atoi(argv[2]);
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun fd = open(name, O_RDWR);
87*4882a593Smuzhiyun if (fd < 0) {
88*4882a593Smuzhiyun printf("open %s failed!\n", name);
89*4882a593Smuzhiyun return fd;
90*4882a593Smuzhiyun }
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun if (argc == 4) {
93*4882a593Smuzhiyun mux = atoi(argv[3]);
94*4882a593Smuzhiyun ret = rk_iomux_ioctl_set(fd, bank, pin, mux);
95*4882a593Smuzhiyun if (ret)
96*4882a593Smuzhiyun goto err;
97*4882a593Smuzhiyun } else if (argc == 3) {
98*4882a593Smuzhiyun ret = rk_iomux_ioctl_get(fd, bank, pin, &mux);
99*4882a593Smuzhiyun if (ret)
100*4882a593Smuzhiyun goto err;
101*4882a593Smuzhiyun printf("mux get (GPIO%d-%d) = %d\n", bank, pin, mux);
102*4882a593Smuzhiyun }
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun err:
105*4882a593Smuzhiyun close(fd);
106*4882a593Smuzhiyun return 0;
107*4882a593Smuzhiyun }
108