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/*
* Copyright (C) 2021 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE /* For asprintf */
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "compatible_devices.h"
#include "exynos4412_gpios.h"
#include "exynos4412_gpios_data.h"
#include "tests.h"
static int run_command(int debug, char *command)
{
char *silent_command;
int rc;
if (debug) {
return system(command);
} else {
rc = asprintf(&silent_command, "%s 1>/dev/null", command);
if (rc == -1) {
rc = errno;
printf("%s: asprintf failed with error %d: %s\n",
__func__, rc, strerror(rc));
assert(false);
}
rc = system(silent_command);
free(silent_command);
return rc;
}
}
static int test_output_value_with_libgpiod(int debug, char *devmem, int fd,
size_t page_size, char *bank,
int gpio_offset)
{
char *gpioset_high_command;
char *gpioset_low_command;
int rc;
rc = asprintf(&gpioset_high_command, "gpioset %s %d=1", bank,
gpio_offset);
if (rc == -1) {
rc = errno;
printf("%s: asprintf failed with error %d: %s\n",
__func__, rc, strerror(rc));
assert(false);
}
rc = run_command(debug, gpioset_high_command);
assert(rc == 0);
free(gpioset_high_command);
rc = gpio_get_direction(devmem, fd, page_size, bank, gpio_offset);
assert (rc == GPIO_OUTPUT);
rc = gpio_get_output_value(devmem, fd, page_size, bank, gpio_offset);
assert (rc == GPIO_VALUE_HIGH);
rc = asprintf(&gpioset_low_command, "gpioset %s %d=0", bank,
gpio_offset);
if (rc == -1) {
rc = errno;
printf("%s: asprintf failed with error %d: %s\n",
__func__, rc, strerror(rc));
assert(false);
}
rc = run_command(debug, gpioset_low_command);
assert(rc == 0);
rc = gpio_get_direction(devmem, fd, page_size, bank, gpio_offset);
assert (rc == GPIO_OUTPUT);
rc = gpio_get_output_value(devmem, fd, page_size, bank, gpio_offset);
assert (rc == GPIO_VALUE_LOW);
free(gpioset_low_command);
return 0;
}
static int test_flash_with_devmem2(int debug, char *devmem, int fd,
size_t page_size)
{
int rc;
/* Default values at boot:
* +--------------+------------+----------+
* | Distribution | Address | Value[1] |
* +--------------+------------+----------+
* | Parabola | 0x11400260 | 0x2000 |
* | Parabola | 0x11400264 | 0x0000 |
* +--------------+------------+----------+
* [1]obtained with devmem2 <address> w
*/
/* Set the GPIO to input */
if (debug)
printf(" Starting devmem2 GPIO input test\n");
/* GPJ1CON[4:7] with bit 4 to 7 at 0 => 0xnn0n (n == don't care) */
rc = run_command(debug, "devmem2 0x11400260 w 0x2000");
assert(rc == 0);
rc = gpio_get_direction(devmem, fd, page_size, "gpj1", 1);
assert (rc == GPIO_INPUT);
printf("[ OK ] devmem2 GPIO input test\n");
/* Set the GPIO to output */
if (debug)
printf(" Starting devmem2 GPIO output test\n");
/* GPJ1CON[4:7] with bit 1 @ 1 and the rest at 0 => 1<<5 == 0x20 */
rc = run_command(debug, "devmem2 0x11400260 w 0x2020");
assert(rc == 0);
rc = gpio_get_direction(devmem, fd, page_size, "gpj1", 1);
assert (rc == GPIO_OUTPUT);
printf("[ OK ] devmem2 GPIO output test\n");
/* Set the pin LOW */
/* GPJ1DAT[1] == 0 */
if (debug)
printf(" Starting devmem2 GPIO output low test\n");
rc = run_command(debug, "devmem2 0x11400264 w 0");
assert(rc == 0);
rc = gpio_get_output_value(devmem, fd, page_size, "gpj1", 1);
assert (rc == GPIO_VALUE_LOW);
printf("[ OK ] devmem2 GPIO output low test\n");
/* Set the pin HIGH */
/* GPJ1DAT[1] == 1 => 1<<1 == 2 */
if (debug)
printf(" Starting devmem2 GPIO output high test\n");
rc = run_command(debug, "devmem2 0x11400264 w 2");
assert(rc == 0);
rc = gpio_get_output_value(devmem, fd, page_size, "gpj1", 1);
assert (rc == GPIO_VALUE_HIGH);
printf("[ OK ] devmem2 GPIO output high test\n");
/* Set it to low again */
/* GPJ1DAT[1] == 0 */
if (debug)
printf(" Starting devmem2 GPIO output low test\n");
rc = run_command(debug, "devmem2 0x11400264 w 0");
assert(rc == 0);
rc = gpio_get_output_value(devmem, fd, page_size, "gpj1", 1);
assert (rc == GPIO_VALUE_LOW);
printf("[ OK ] devmem2 GPIO output low test\n");
return 0;
}
static int test_direction_with_libgpiod(int debug, char *devmem, int fd,
size_t page_size, char *bank,
int gpio_offset)
{
char *gpioget_command;
char *gpioset_command;
int rc;
rc = asprintf(&gpioget_command, "gpioget %s %d", bank,
gpio_offset);
if (rc == -1) {
rc = errno;
printf("%s: asprintf failed with error %d: %s\n",
__func__, rc, strerror(rc));
assert(false);
}
rc = run_command(debug, gpioget_command);
assert(rc == 0);
free(gpioget_command);
rc = gpio_get_direction(devmem, fd, page_size, bank, gpio_offset);
assert (rc == GPIO_INPUT);
rc = asprintf(&gpioset_command, "gpioset %s %d=1", bank,
gpio_offset);
if (rc == -1) {
rc = errno;
printf("%s: asprintf failed with error %d: %s\n",
__func__, rc, strerror(rc));
assert(false);
}
rc = run_command(debug, gpioset_command);
assert(rc == 0);
rc = gpio_get_direction(devmem, fd, page_size, bank, gpio_offset);
assert (rc == GPIO_OUTPUT);
free(gpioset_command);
return 0;
}
int run_tests(int debug, char *devmem, int fd, size_t page_size)
{
bool has_devmem2;
bool has_gpioget;
bool has_gpioset;
has_devmem2 = device_has_devmem2(debug);
has_gpioget = device_has_gpioget(debug);
has_gpioset = device_has_gpioset(debug);
if (has_gpioget && has_gpioset) {
test_direction_with_libgpiod(debug, devmem, fd, page_size,
"gpj1", 1);
printf("[ OK ] libgpiod GPIO direction test\n");
test_output_value_with_libgpiod(debug, devmem, fd, page_size,
"gpj1", 1);
printf("[ OK ] libgpiod GPIO output value test\n");
} else {
if (!has_gpioget)
printf("[ !! ] gpioget not found: skipping"
" libgpiod direction and output tests\n");
if (!has_gpioset)
printf("[ !! ] gpioset not found: skipping"
" libgpiod direction and output tests\n");
}
if (has_devmem2) {
test_flash_with_devmem2(debug, devmem, fd, page_size);
} else {
printf("[ !! ] devmem2 not found: skipping"
" devmem2 direction and output tests\n");
}
return 0;
}
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