diff options
Diffstat (limited to 'usr.sbin/gpioctl/gpioctl.c')
| -rw-r--r-- | usr.sbin/gpioctl/gpioctl.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/usr.sbin/gpioctl/gpioctl.c b/usr.sbin/gpioctl/gpioctl.c new file mode 100644 index 0000000..8956ef4 --- /dev/null +++ b/usr.sbin/gpioctl/gpioctl.c @@ -0,0 +1,323 @@ +/*- + * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <fcntl.h> +#include <getopt.h> +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <sys/gpio.h> + +struct flag_desc { + const char *name; + uint32_t flag; +}; + +struct flag_desc gpio_flags[] = { + { "IN", GPIO_PIN_INPUT }, + { "OUT", GPIO_PIN_OUTPUT }, + { "OD", GPIO_PIN_OPENDRAIN }, + { "PP", GPIO_PIN_PUSHPULL }, + { "TS", GPIO_PIN_TRISTATE }, + { "PU", GPIO_PIN_PULLUP }, + { "PD", GPIO_PIN_PULLDOWN }, + { "II", GPIO_PIN_INVIN }, + { "IO", GPIO_PIN_INVOUT }, + { "PULSE", GPIO_PIN_PULSATE }, + { NULL, 0 }, +}; + +int str2cap(const char *str); + +static void +usage(void) +{ + fprintf(stderr, "Usage:\n"); + fprintf(stderr, "\tgpioctl -f ctldev -l [-v]\n"); + fprintf(stderr, "\tgpioctl -f ctldev -t pin\n"); + fprintf(stderr, "\tgpioctl -f ctldev -c pin flag ...\n"); + fprintf(stderr, "\tgpioctl -f ctldev pin [0|1]\n"); + exit(1); +} + +static const char * +cap2str(uint32_t cap) +{ + struct flag_desc * pdesc = gpio_flags; + while (pdesc->name) { + if (pdesc->flag == cap) + return pdesc->name; + pdesc++; + } + + return "UNKNOWN"; +} + +int +str2cap(const char *str) +{ + struct flag_desc * pdesc = gpio_flags; + while (pdesc->name) { + if (strcasecmp(str, pdesc->name) == 0) + return pdesc->flag; + pdesc++; + } + + return (-1); +} + +/* + * Our handmade function for converting string to number + */ +static int +str2int(const char *s, int *ok) +{ + char *endptr; + int res = strtod(s, &endptr); + if (endptr != s + strlen(s) ) + *ok = 0; + else + *ok = 1; + + return res; +} + +static void +print_caps(int caps) +{ + int i, need_coma; + + need_coma = 0; + printf("<"); + for (i = 0; i < 32; i++) { + if (caps & (1 << i)) { + if (need_coma) + printf(","); + printf("%s", cap2str(1 << i)); + need_coma = 1; + } + } + printf(">"); +} + +static void +dump_pins(int fd, int verbose) +{ + int i, maxpin; + struct gpio_pin pin; + struct gpio_req req; + + if (ioctl(fd, GPIOMAXPIN, &maxpin) < 0) { + perror("ioctl(GPIOMAXPIN)"); + exit(1); + } + + for (i = 0; i <= maxpin; i++) { + pin.gp_pin = i; + if (ioctl(fd, GPIOGETCONFIG, &pin) < 0) + /* For some reason this pin is inaccessible */ + continue; + + req.gp_pin = i; + if (ioctl(fd, GPIOGET, &req) < 0) { + /* Now, that's wrong */ + perror("ioctl(GPIOGET)"); + exit(1); + } + + printf("pin %02d:\t%d\t%s", pin.gp_pin, req.gp_value, + pin.gp_name); + + print_caps(pin.gp_flags); + + if (verbose) { + printf(", caps:"); + print_caps(pin.gp_caps); + } + printf("\n"); + } +} + +static void +fail(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vfprintf(stderr, fmt, ap); + va_end(ap); + exit(1); +} + +int +main(int argc, char **argv) +{ + int i; + struct gpio_pin pin; + struct gpio_req req; + char *ctlfile = NULL; + int pinn, pinv, fd, ch; + int flags, flag, ok; + int config, toggle, verbose, list; + + config = toggle = verbose = list = pinn = 0; + + while ((ch = getopt(argc, argv, "c:f:lt:v")) != -1) { + switch (ch) { + case 'c': + config = 1; + pinn = str2int(optarg, &ok); + if (!ok) + fail("Invalid pin number: %s\n", optarg); + break; + case 'f': + ctlfile = optarg; + break; + case 'l': + list = 1; + break; + case 't': + toggle = 1; + pinn = str2int(optarg, &ok); + if (!ok) + fail("Invalid pin number: %s\n", optarg); + break; + case 'v': + verbose = 1; + break; + default: + usage(); + break; + } + } + argv += optind; + argc -= optind; + for (i = 0; i < argc; i++) + printf("%d/%s\n", i, argv[i]); + + if (ctlfile == NULL) + fail("No gpioctl device provided\n"); + + fd = open(ctlfile, O_RDONLY); + if (fd < 0) { + perror("open"); + exit(1); + } + + if (list) { + dump_pins(fd, verbose); + close(fd); + exit(0); + } + + if (toggle) { + /* + * -t pin assumes no additional arguments + */ + if(argc > 0) { + usage(); + exit(1); + } + + req.gp_pin = pinn; + if (ioctl(fd, GPIOTOGGLE, &req) < 0) { + perror("ioctl(GPIOTOGGLE)"); + exit(1); + } + + close(fd); + exit (0); + } + + if (config) { + flags = 0; + for (i = 0; i < argc; i++) { + flag = str2cap(argv[i]); + if (flag < 0) + fail("Invalid flag: %s\n", argv[i]); + flags |= flag; + } + + pin.gp_pin = pinn; + pin.gp_flags = flags; + if (ioctl(fd, GPIOSETCONFIG, &pin) < 0) { + perror("ioctl(GPIOSETCONFIG)"); + exit(1); + } + + exit(0); + } + + /* + * Last two cases - set value or print value + */ + if ((argc == 0) || (argc > 2)) { + usage(); + exit(1); + } + + pinn = str2int(argv[0], &ok); + if (!ok) + fail("Invalid pin number: %s\n", argv[0]); + + /* + * Read pin value + */ + if (argc == 1) { + req.gp_pin = pinn; + if (ioctl(fd, GPIOGET, &req) < 0) { + perror("ioctl(GPIOGET)"); + exit(1); + } + printf("%d\n", req.gp_value); + exit (0); + } + + /* Is it valid number (0 or 1) ? */ + pinv = str2int(argv[1], &ok); + if (!ok || ((pinv != 0) && (pinv != 1))) + fail("Invalid pin value: %s\n", argv[1]); + + /* + * Set pin value + */ + req.gp_pin = pinn; + req.gp_value = pinv; + if (ioctl(fd, GPIOSET, &req) < 0) { + perror("ioctl(GPIOSET)"); + exit(1); + } + + close(fd); + exit(0); +} |
