gpio: removed due to being useless.

Signed-off-by: Gediminas Jakutis <gediminas@varciai.lt>

4 files changed, 1 insertions, 318 deletions

diff --git a/src/gpio/gpio.c b/src/gpio/gpio.c
deleted file mode 100644
index 0507769..0000000
--- a/src/gpio/gpio.c
+++ /dev/null
@@ -1,261 +0,0 @@
-/*
- * The Rin Library – gpio module
- *
- * Copyright (C) 2016 Gediminas Jakutis
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1
- * of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#include "rin/gpio.h"
-#include "gpio_private.h"
-
-unsigned int rin_gpio_open(const unsigned int num, const enum rin_gpiotype type)
-{
-	struct stat st;
-	struct timespec grace = { 0, 1 * 1000 * 1000 }; /* 1 ms */
-	char buf[48] = { 0 };
-	int fd;
-	unsigned int timeout;
-
-	init();
-
-	if (type == rin_gpio_closed || !rin_gpio_num_exists(num) || gpio[num].type != rin_gpio_closed) {
-		return 1;
-	}
-
-	fd = open("/sys/class/gpio/export", O_WRONLY | O_DSYNC);
-	sprintf(buf, "%u", num);
-	write(fd, buf, strlen(buf));
-	close(fd);
-	sprintf(buf, "/sys/class/gpio/gpio%u/direction", num);
-	timeout = 500; /* 500 ms, if it takes longer, something ain't right. */
-	while (stat(buf, &st)) {
-		nanosleep(&grace, NULL);
-		if (!(--timeout)) {
-			return 1;
-		}
-	}
-	fd = open(buf, O_WRONLY | O_DSYNC);
-	if (type == rin_gpio_in) {
-		write(fd, "in", 2);
-	} else {
-		write(fd, "out", 3);
-	}
-	close(fd);
-	gpio[num].type = type;
-	sprintf(buf, "/sys/class/gpio/gpio%u/value", num);
-	if (type == rin_gpio_in) {
-		gpio[num].fd = open(buf, O_RDONLY);
-	} else {
-		gpio[num].fd = open(buf, O_WRONLY);
-	}
-
-	return 0;
-}
-
-unsigned int rin_gpio_close(const unsigned int num)
-{
-	char buf[32] = { 0 };
-	struct stat st;
-	int fd;
-
-	init();
-	sprintf(buf, "/sys/class/gpio/gpio%u", num);
-	if (stat(buf, &st)) {
-		return 0;
-	}
-	close(gpio[num].fd);
-	gpio[num].fd = -1;
-	fd = open("/sys/class/gpio/unexport", O_WRONLY);
-	sprintf(buf, "%u", num);
-	write(fd, buf, strlen(buf));
-	close(fd);
-	gpio[num].type = rin_gpio_closed;
-	return 0;
-}
-
-unsigned int rin_gpio_setval(const unsigned int num, const unsigned int val)
-{
-	char buf[8] = { 0 };
-
-	init();
-	if (!rin_gpio_num_exists(num) || gpio[num].type != rin_gpio_out) {
-		return 1;
-	}
-	sprintf(buf, "%u", val);
-	lseek(gpio[num].fd, 0, SEEK_SET);
-	write(gpio[num].fd, buf, strlen(buf));
-	return 0;
-}
-
-unsigned int rin_gpio_readval(const unsigned int num, unsigned int * const val)
-{
-	init();
-
-	if (!rin_gpio_num_exists(num) || gpio[num].type != rin_gpio_in) {
-		exit(EXIT_FAILURE);
-	}
-
-	lseek(gpio[num].fd, 0, SEEK_SET);
-	read(gpio[num].fd, val, 1);
-
-	if (*val >= '0') {
-		*val -= '0';
-	}
-
-	return 0;
-}
-
-
-unsigned int rin_gpio_writesequence(const struct rin_gpio_dataset * const dataset)
-{
-	unsigned char *data;
-	size_t i;
-
-	if (!dataset || !dataset->data) {
-		return 1;
-	}
-	data = dataset->data;
-	for (i = 0; i < dataset->len; ++i) {
-		unsigned char a;
-		unsigned char bit;
-
-		a = data[i / CHAR_BIT];
-		bit = !(!(a & (1 << (i % CHAR_BIT))));
-		rin_gpio_setval(dataset->signalnum, bit);
-		rin_gpio_pulse(dataset->clocknum, dataset->pulseduration);
-		if (dataset->delay) {
-			nanosleep(dataset->delay, NULL);
-		}
-	}
-	return 0;
-}
-
-unsigned int rin_gpio_on(const unsigned int num)
-{
-	return rin_gpio_setval(1, num);
-}
-
-unsigned int rin_gpio_off(const unsigned int num)
-{
-	return rin_gpio_setval(0, num);
-}
-
-unsigned int rin_gpio_pulse(const unsigned int num, const struct timespec * const pulselen)
-{
-	unsigned int ret;
-
-	ret = rin_gpio_on(num);
-	if (ret) {
-		return ret;
-	}
-	if (pulselen) {
-		nanosleep(pulselen, NULL);
-	}
-	ret = rin_gpio_off(num);
-	return ret;
-}
-
-/*
- * right now is rpi V1 specific, should be rewritten when/if we support
- * other platforms.
- */
-unsigned int rin_gpio_num_exists(const unsigned int num)
-{
-	switch (num) {
-	case 2:
-	case 3:
-	case 4:
-	case 7:
-	case 8:
-	case 9:
-	case 10:
-	case 11:
-	case 14:
-	case 15:
-	case 17:
-	case 18:
-	case 22:
-	case 23:
-	case 24:
-	case 25:
-		return 1;
-	default:
-		return 0;
-	}
-}
-
-/*
- * in case we ever support hardware other than the V1 Raspberry,
- * we need this to get the pin usable pin count
- */
-unsigned int rin_gpio_get_numcount(void)
-{
-	return 16;
-}
-
-unsigned int rin_gpio_get_pincount(void)
-{
-	return 26;
-}
-
-unsigned int rin_gpio_pin_to_num(const unsigned int pin)
-{
-	static const unsigned int pinmap[] = {	 0, /* nonexistent zeroth index */
-						 0,  0,  2,  0,
-						 3,  0,  4, 14,
-						 0, 15, 17, 18,
-						27,  0, 22, 23,
-						 0, 24, 10,  0,
-						 9, 25, 11,  8,  7};
-
-	if (pin <= rin_gpio_get_pincount()) {
-		return pinmap[pin];
-	} else {
-		return 0;
-	}
-}
-
-unsigned int rin_gpio_num_to_pin(const unsigned int num)
-{
-	static const unsigned int nummap[] = {	 0, /* zeroth */
-						 0,  3,  5,  7,
-						 0,  0, 26, 24,
-						21, 19, 23,  0,
-						 0,  8, 10,  0,
-						11, 12,  0,  0,
-						 0, 15, 16, 18, 22};
-
-	if (num <= 26) {
-		return nummap[num];
-	} else {
-		return 0;
-	}
-}
-
-static void init(void)
-{
-	size_t i;
-	static unsigned int firstrun = 1;
-
-	if (firstrun) {
-		firstrun = 0;
-		for (i = 0; i < gpio_count; ++i) {
-			gpio[i].num = i;
-			gpio[i].type = rin_gpio_closed;
-			gpio[i].fd = -1;
-		}
-	}
-}
diff --git a/src/gpio/gpio_private.h b/src/gpio/gpio_private.h
deleted file mode 100644
index 4a22570..0000000
--- a/src/gpio/gpio_private.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * The Rin Library – gpio module
- *
- * Copyright (C) 2016 Gediminas Jakutis
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1
- * of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#ifndef GPIO_PRIVATE_H_INCLUDED
-#define GPIO_PRIVATE_H_INCLUDED
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <time.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-/* TODO: make this platform-dependent */
-#define gpio_count 32
-
-static struct gpio {
-	unsigned int num;
-	enum rin_gpiotype type;
-	int fd;
-} gpio[gpio_count];
-
-static void init(void);
-
-#endif /* GPIO_PRIVATE_H_INCLUDED */
diff --git a/src/gpio/meson.build b/src/gpio/meson.build
deleted file mode 100644
index 82887cb..0000000
--- a/src/gpio/meson.build
+++ /dev/null
@@ -1,10 +0,0 @@
-if get_option('gpio')
-	gpio_filenames = [
-		'gpio.c',
-		'gpio_private.h',
-	]
-else
-	gpio_filenames = []
-endif
-
-gpio_sources = files(gpio_filenames)
diff --git a/src/meson.build b/src/meson.build
index 8bd83b7..108f4b8 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,7 +1,5 @@
 subdir('float')
-subdir('gpio')
 subdir('diagnostic')
 subdir('time')
 
-sources = [float_sources, gpio_sources, diagnostic_sources, time_sources]
-
+sources = [float_sources, diagnostic_sources, time_sources]