selftest/gpio: add gpio test case
This test script try to do whitebox testing for gpio subsystem(based on gpiolib). It manipulate gpio device through chardev or sysfs and check the result from debugfs. This script test gpio-mockup through chardev by default. User could test other gpio chip by passing the module name. Some of the testcases are turned off by default to avoid the conflicting with gpiochip in system. In details, it test the following things: 1. Test direction and output value for valid pin. 2. Test dynamic allocation of gpio base. 3. Add single, multi gpiochip to do overlap check. Run "tools/testing/selftests/gpio/gpio-mockup.sh -h" for usage. Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Bamvor Jian Zhang
Shuah Khan
parent
981c3db62e
commit
22f6592b23
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@ -6,6 +6,7 @@ TARGETS += exec
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TARGETS += firmware
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TARGETS += ftrace
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TARGETS += futex
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TARGETS += gpio
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TARGETS += ipc
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TARGETS += kcmp
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TARGETS += lib
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@ -0,0 +1,23 @@
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TEST_PROGS := gpio-mockup.sh
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TEST_FILES := gpio-mockup-sysfs.sh $(BINARIES)
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BINARIES := gpio-mockup-chardev
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include ../lib.mk
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all: $(BINARIES)
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clean:
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$(RM) $(BINARIES)
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CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/
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LDLIBS += -lmount -I/usr/include/libmount
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$(BINARIES): ../../../gpio/gpio-utils.o ../../../../usr/include/linux/gpio.h
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../../../gpio/gpio-utils.o:
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make ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C ../../../gpio
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../../../../usr/include/linux/gpio.h:
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make -C ../../../.. headers_install INSTALL_HDR_PATH=$(shell pwd)/../../../../usr/
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@ -0,0 +1,324 @@
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/*
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* GPIO chardev test helper
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*
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* Copyright (C) 2016 Bamvor Jian Zhang
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#define _GNU_SOURCE
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <sys/ioctl.h>
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#include <libmount.h>
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#include <err.h>
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#include <dirent.h>
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#include <linux/gpio.h>
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#include "../../../gpio/gpio-utils.h"
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#define CONSUMER "gpio-selftest"
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#define GC_NUM 10
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enum direction {
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OUT,
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IN
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};
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static int get_debugfs(char **path)
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{
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struct libmnt_context *cxt;
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struct libmnt_table *tb;
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struct libmnt_iter *itr = NULL;
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struct libmnt_fs *fs;
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int found = 0;
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cxt = mnt_new_context();
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if (!cxt)
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err(EXIT_FAILURE, "libmount context allocation failed");
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itr = mnt_new_iter(MNT_ITER_FORWARD);
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if (!itr)
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err(EXIT_FAILURE, "failed to initialize libmount iterator");
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if (mnt_context_get_mtab(cxt, &tb))
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err(EXIT_FAILURE, "failed to read mtab");
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while (mnt_table_next_fs(tb, itr, &fs) == 0) {
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const char *type = mnt_fs_get_fstype(fs);
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if (!strcmp(type, "debugfs")) {
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found = 1;
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break;
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}
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}
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if (found)
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asprintf(path, "%s/gpio", mnt_fs_get_target(fs));
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mnt_free_iter(itr);
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mnt_free_context(cxt);
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if (!found)
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return -1;
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return 0;
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}
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static int gpio_debugfs_get(const char *consumer, int *dir, int *value)
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{
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char *debugfs;
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FILE *f;
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char *line = NULL;
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size_t len = 0;
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char *cur;
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int found = 0;
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if (get_debugfs(&debugfs) != 0)
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err(EXIT_FAILURE, "debugfs is not mounted");
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f = fopen(debugfs, "r");
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if (!f)
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err(EXIT_FAILURE, "read from gpio debugfs failed");
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/*
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* gpio-2 ( |gpio-selftest ) in lo
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*/
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while (getline(&line, &len, f) != -1) {
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cur = strstr(line, consumer);
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if (cur == NULL)
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continue;
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cur = strchr(line, ')');
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if (!cur)
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continue;
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cur += 2;
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if (!strncmp(cur, "out", 3)) {
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*dir = OUT;
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cur += 4;
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} else if (!strncmp(cur, "in", 2)) {
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*dir = IN;
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cur += 4;
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}
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if (!strncmp(cur, "hi", 2))
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*value = 1;
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else if (!strncmp(cur, "lo", 2))
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*value = 0;
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found = 1;
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break;
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}
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free(debugfs);
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fclose(f);
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free(line);
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if (!found)
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return -1;
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return 0;
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}
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static struct gpiochip_info *list_gpiochip(const char *gpiochip_name, int *ret)
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{
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struct gpiochip_info *cinfo;
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struct gpiochip_info *current;
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const struct dirent *ent;
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DIR *dp;
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char *chrdev_name;
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int fd;
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int i = 0;
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cinfo = calloc(sizeof(struct gpiochip_info) * 4, GC_NUM + 1);
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if (!cinfo)
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err(EXIT_FAILURE, "gpiochip_info allocation failed");
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current = cinfo;
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dp = opendir("/dev");
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if (!dp) {
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*ret = -errno;
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goto error_out;
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} else {
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*ret = 0;
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}
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while (ent = readdir(dp), ent) {
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if (check_prefix(ent->d_name, "gpiochip")) {
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*ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name);
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if (*ret < 0)
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goto error_out;
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fd = open(chrdev_name, 0);
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if (fd == -1) {
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*ret = -errno;
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fprintf(stderr, "Failed to open %s\n",
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chrdev_name);
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goto error_close_dir;
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}
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*ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, current);
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if (*ret == -1) {
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perror("Failed to issue CHIPINFO IOCTL\n");
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goto error_close_dir;
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}
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close(fd);
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if (strcmp(current->label, gpiochip_name) == 0
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|| check_prefix(current->label, gpiochip_name)) {
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*ret = 0;
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current++;
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i++;
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}
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}
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}
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if ((!*ret && i == 0) || *ret < 0) {
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free(cinfo);
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cinfo = NULL;
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}
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if (!*ret && i > 0) {
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cinfo = realloc(cinfo, sizeof(struct gpiochip_info) * 4 * i);
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*ret = i;
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}
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error_close_dir:
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closedir(dp);
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error_out:
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if (*ret < 0)
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err(EXIT_FAILURE, "list gpiochip failed: %s", strerror(*ret));
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return cinfo;
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}
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int gpio_pin_test(struct gpiochip_info *cinfo, int line, int flag, int value)
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{
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struct gpiohandle_data data;
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unsigned int lines[] = {line};
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int fd;
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int debugfs_dir = IN;
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int debugfs_value = 0;
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int ret;
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data.values[0] = value;
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ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data,
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CONSUMER);
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if (ret < 0)
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goto fail_out;
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else
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fd = ret;
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ret = gpio_debugfs_get(CONSUMER, &debugfs_dir, &debugfs_value);
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if (ret) {
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ret = -EINVAL;
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goto fail_out;
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}
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if (flag & GPIOHANDLE_REQUEST_INPUT) {
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if (debugfs_dir != IN) {
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errno = -EINVAL;
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ret = -errno;
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}
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} else if (flag & GPIOHANDLE_REQUEST_OUTPUT) {
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if (flag & GPIOHANDLE_REQUEST_ACTIVE_LOW)
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debugfs_value = !debugfs_value;
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if (!(debugfs_dir == OUT && value == debugfs_value))
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errno = -EINVAL;
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ret = -errno;
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}
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gpiotools_release_linehandle(fd);
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fail_out:
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if (ret)
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err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>",
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cinfo->name, line, flag, value);
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return ret;
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}
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void gpio_pin_tests(struct gpiochip_info *cinfo, unsigned int line)
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{
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printf("line<%d>", line);
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gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 0);
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printf(".");
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gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 1);
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printf(".");
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gpio_pin_test(cinfo, line,
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GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW,
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0);
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printf(".");
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gpio_pin_test(cinfo, line,
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GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW,
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1);
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printf(".");
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gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_INPUT, 0);
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printf(".");
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}
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/*
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* ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip
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* Return 0 if successful or exit with EXIT_FAILURE if test failed.
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* gpio_chip_name_prefix: The prefix of gpiochip you want to test. E.g.
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* gpio-mockup
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* is_valid_gpio_chip: Whether the gpio_chip is valid. 1 means valid,
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* 0 means invalid which could not be found by
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* list_gpiochip.
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*/
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int main(int argc, char *argv[])
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{
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char *prefix;
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int valid;
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struct gpiochip_info *cinfo;
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struct gpiochip_info *current;
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int i;
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int ret;
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if (argc < 3) {
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printf("Usage: %s prefix is_valid", argv[0]);
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exit(EXIT_FAILURE);
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}
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prefix = argv[1];
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valid = strcmp(argv[2], "true") == 0 ? 1 : 0;
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printf("Test gpiochip %s: ", prefix);
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cinfo = list_gpiochip(prefix, &ret);
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if (!cinfo) {
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if (!valid && ret == 0) {
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printf("Invalid test successful\n");
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ret = 0;
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goto out;
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} else {
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ret = -EINVAL;
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goto out;
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}
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} else if (cinfo && !valid) {
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ret = -EINVAL;
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goto out;
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}
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current = cinfo;
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for (i = 0; i < ret; i++) {
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gpio_pin_tests(current, 0);
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gpio_pin_tests(current, current->lines - 1);
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gpio_pin_tests(current, random() % current->lines);
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current++;
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}
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ret = 0;
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printf("successful\n");
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out:
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if (ret)
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fprintf(stderr, "gpio<%s> test failed\n", prefix);
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if (cinfo)
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free(cinfo);
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if (ret)
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exit(EXIT_FAILURE);
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return ret;
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}
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@ -0,0 +1,134 @@
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is_consistent()
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{
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val=
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active_low_sysfs=`cat $GPIO_SYSFS/gpio$nr/active_low`
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val_sysfs=`cat $GPIO_SYSFS/gpio$nr/value`
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dir_sysfs=`cat $GPIO_SYSFS/gpio$nr/direction`
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gpio_this_debugfs=`cat $GPIO_DEBUGFS |grep "gpio-$nr" | sed "s/(.*)//g"`
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dir_debugfs=`echo $gpio_this_debugfs | awk '{print $2}'`
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val_debugfs=`echo $gpio_this_debugfs | awk '{print $3}'`
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if [ $val_debugfs = "lo" ]; then
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val=0
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elif [ $val_debugfs = "hi" ]; then
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val=1
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fi
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if [ $active_low_sysfs = "1" ]; then
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if [ $val = "0" ]; then
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val="1"
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else
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val="0"
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fi
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fi
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if [ $val_sysfs = $val ] && [ $dir_sysfs = $dir_debugfs ]; then
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echo -n "."
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else
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echo "test fail, exit"
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die
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fi
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}
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test_pin_logic()
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{
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nr=$1
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direction=$2
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active_low=$3
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value=$4
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echo $direction > $GPIO_SYSFS/gpio$nr/direction
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echo $active_low > $GPIO_SYSFS/gpio$nr/active_low
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if [ $direction = "out" ]; then
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echo $value > $GPIO_SYSFS/gpio$nr/value
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fi
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is_consistent $nr
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}
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test_one_pin()
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{
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nr=$1
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echo -n "test pin<$nr>"
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echo $nr > $GPIO_SYSFS/export 2>/dev/null
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if [ X$? != X0 ]; then
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echo "test GPIO pin $nr failed"
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die
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fi
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#"Checking if the sysfs is consistent with debugfs: "
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is_consistent $nr
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#"Checking the logic of active_low: "
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test_pin_logic $nr out 1 1
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test_pin_logic $nr out 1 0
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test_pin_logic $nr out 0 1
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test_pin_logic $nr out 0 0
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#"Checking the logic of direction: "
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test_pin_logic $nr in 1 1
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test_pin_logic $nr out 1 0
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test_pin_logic $nr low 0 1
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test_pin_logic $nr high 0 0
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echo $nr > $GPIO_SYSFS/unexport
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echo "successful"
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}
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test_one_pin_fail()
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{
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nr=$1
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echo $nr > $GPIO_SYSFS/export 2>/dev/null
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if [ X$? != X0 ]; then
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echo "test invalid pin $nr successful"
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else
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echo "test invalid pin $nr failed"
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echo $nr > $GPIO_SYSFS/unexport 2>/dev/null
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die
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fi
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}
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list_chip()
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{
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echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null`
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}
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test_chip()
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{
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chip=$1
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name=`basename $chip`
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base=`cat $chip/base`
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ngpio=`cat $chip/ngpio`
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printf "%-10s %-5s %-5s\n" $name $base $ngpio
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if [ $ngpio = "0" ]; then
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echo "number of gpio is zero is not allowed".
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fi
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test_one_pin $base
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test_one_pin $(($base + $ngpio - 1))
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test_one_pin $((( RANDOM % $ngpio ) + $base ))
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}
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test_chips_sysfs()
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{
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gpiochip=`list_chip $module`
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if [ X"$gpiochip" = X ]; then
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if [ X"$valid" = Xfalse ]; then
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echo "successful"
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else
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echo "fail"
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die
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fi
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else
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for chip in $gpiochip; do
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test_chip $chip
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done
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fi
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}
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|
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@ -0,0 +1,201 @@
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#!/bin/bash
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#exit status
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#1: run as non-root user
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#2: sysfs/debugfs not mount
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#3: insert module fail when gpio-mockup is a module.
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#4: other reason.
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|
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SYSFS=
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GPIO_SYSFS=
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GPIO_DRV_SYSFS=
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DEBUGFS=
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GPIO_DEBUGFS=
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dev_type=
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module=
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usage()
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{
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echo "Usage:"
|
||||
echo "$0 [-f] [-m name] [-t type]"
|
||||
echo "-f: full test. It maybe conflict with existence gpio device."
|
||||
echo "-m: module name, default name is gpio-mockup. It could also test"
|
||||
echo " other gpio device."
|
||||
echo "-t: interface type: chardev(char device) and sysfs(being"
|
||||
echo " deprecated). The first one is default"
|
||||
echo ""
|
||||
echo "$0 -h"
|
||||
echo "This usage"
|
||||
}
|
||||
|
||||
prerequisite()
|
||||
{
|
||||
msg="skip all tests:"
|
||||
if [ $UID != 0 ]; then
|
||||
echo $msg must be run as root >&2
|
||||
exit 1
|
||||
fi
|
||||
SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
|
||||
if [ ! -d "$SYSFS" ]; then
|
||||
echo $msg sysfs is not mounted >&2
|
||||
exit 2
|
||||
fi
|
||||
GPIO_SYSFS=`echo $SYSFS/class/gpio`
|
||||
GPIO_DRV_SYSFS=`echo $SYSFS/devices/platform/$module/gpio`
|
||||
DEBUGFS=`mount -t debugfs | head -1 | awk '{ print $3 }'`
|
||||
if [ ! -d "$DEBUGFS" ]; then
|
||||
echo $msg debugfs is not mounted >&2
|
||||
exit 2
|
||||
fi
|
||||
GPIO_DEBUGFS=`echo $DEBUGFS/gpio`
|
||||
source gpio-mockup-sysfs.sh
|
||||
}
|
||||
|
||||
try_insert_module()
|
||||
{
|
||||
if [ -d "$GPIO_DRV_SYSFS" ]; then
|
||||
echo "$GPIO_DRV_SYSFS exist. Skip insert module"
|
||||
else
|
||||
modprobe -q $module $1
|
||||
if [ X$? != X0 ]; then
|
||||
echo $msg insmod $module failed >&2
|
||||
exit 3
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
remove_module()
|
||||
{
|
||||
modprobe -r -q $module
|
||||
}
|
||||
|
||||
die()
|
||||
{
|
||||
remove_module
|
||||
exit 4
|
||||
}
|
||||
|
||||
test_chips()
|
||||
{
|
||||
if [ X$dev_type = Xsysfs ]; then
|
||||
echo "WARNING: sysfs ABI of gpio is going to deprecated."
|
||||
test_chips_sysfs $*
|
||||
else
|
||||
$BASE/gpio-mockup-chardev $*
|
||||
fi
|
||||
}
|
||||
|
||||
gpio_test()
|
||||
{
|
||||
param=$1
|
||||
valid=$2
|
||||
|
||||
if [ X"$param" = X ]; then
|
||||
die
|
||||
fi
|
||||
try_insert_module "gpio_mockup_ranges=$param"
|
||||
echo -n "GPIO $module test with ranges: <"
|
||||
echo "$param>: "
|
||||
printf "%-10s %s\n" $param
|
||||
test_chips $module $valid
|
||||
remove_module
|
||||
}
|
||||
|
||||
BASE=`dirname $0`
|
||||
|
||||
dev_type=
|
||||
TEMP=`getopt -o fhm:t: -n '$0' -- "$@"`
|
||||
|
||||
if [ "$?" != "0" ]; then
|
||||
echo "Parameter process failed, Terminating..." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Note the quotes around `$TEMP': they are essential!
|
||||
eval set -- "$TEMP"
|
||||
|
||||
while true; do
|
||||
case $1 in
|
||||
-f)
|
||||
full_test=true
|
||||
shift
|
||||
;;
|
||||
-h)
|
||||
usage
|
||||
exit
|
||||
;;
|
||||
-m)
|
||||
module=$2
|
||||
shift 2
|
||||
;;
|
||||
-t)
|
||||
dev_type=$2
|
||||
shift 2
|
||||
;;
|
||||
--)
|
||||
shift
|
||||
break
|
||||
;;
|
||||
*)
|
||||
echo "Internal error!"
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
if [ X"$module" = X ]; then
|
||||
module="gpio-mockup"
|
||||
fi
|
||||
|
||||
if [ X$dev_type != Xsysfs ]; then
|
||||
dev_type="chardev"
|
||||
fi
|
||||
|
||||
prerequisite
|
||||
|
||||
echo "1. Test dynamic allocation of gpio successful means insert gpiochip and"
|
||||
echo " manipulate gpio pin successful"
|
||||
gpio_test "-1,32" true
|
||||
gpio_test "-1,32,-1,32" true
|
||||
gpio_test "-1,32,-1,32,-1,32" true
|
||||
if [ X$full_test = Xtrue ]; then
|
||||
gpio_test "-1,32,32,64" true
|
||||
gpio_test "-1,32,40,64,-1,5" true
|
||||
gpio_test "-1,32,32,64,-1,32" true
|
||||
gpio_test "0,32,32,64,-1,32,-1,32" true
|
||||
gpio_test "-1,32,-1,32,0,32,32,64" true
|
||||
echo "2. Do basic test: successful means insert gpiochip and"
|
||||
echo " manipulate gpio pin successful"
|
||||
gpio_test "0,32" true
|
||||
gpio_test "0,32,32,64" true
|
||||
gpio_test "0,32,40,64,64,96" true
|
||||
fi
|
||||
echo "3. Error test: successful means insert gpiochip failed"
|
||||
echo "3.1 Test number of gpio overflow"
|
||||
#Currently: The max number of gpio(1024) is defined in arm architecture.
|
||||
gpio_test "-1,32,-1,1024" false
|
||||
if [ X$full_test = Xtrue ]; then
|
||||
echo "3.2 Test zero line of gpio"
|
||||
gpio_test "0,0" false
|
||||
echo "3.3 Test range overlap"
|
||||
echo "3.3.1 Test corner case"
|
||||
gpio_test "0,32,0,1" false
|
||||
gpio_test "0,32,32,64,32,40" false
|
||||
gpio_test "0,32,35,64,35,45" false
|
||||
gpio_test "0,32,31,32" false
|
||||
gpio_test "0,32,32,64,36,37" false
|
||||
gpio_test "0,32,35,64,34,36" false
|
||||
echo "3.3.2 Test inserting invalid second gpiochip"
|
||||
gpio_test "0,32,30,35" false
|
||||
gpio_test "0,32,1,5" false
|
||||
gpio_test "10,32,9,14" false
|
||||
gpio_test "10,32,30,35" false
|
||||
echo "3.3.3 Test others"
|
||||
gpio_test "0,32,40,56,39,45" false
|
||||
gpio_test "0,32,40,56,30,33" false
|
||||
gpio_test "0,32,40,56,30,41" false
|
||||
gpio_test "0,32,40,56,20,21" false
|
||||
fi
|
||||
|
||||
echo GPIO test PASS
|
||||
|
||||
Loading…
Reference in New Issue