/* * GPIO chardev test helper * * Copyright (C) 2016 Bamvor Jian Zhang * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../../../gpio/gpio-utils.h" #define CONSUMER "gpio-selftest" #define GC_NUM 10 enum direction { OUT, IN }; static int get_debugfs(char **path) { struct libmnt_context *cxt; struct libmnt_table *tb; struct libmnt_iter *itr = NULL; struct libmnt_fs *fs; int found = 0; cxt = mnt_new_context(); if (!cxt) err(EXIT_FAILURE, "libmount context allocation failed"); itr = mnt_new_iter(MNT_ITER_FORWARD); if (!itr) err(EXIT_FAILURE, "failed to initialize libmount iterator"); if (mnt_context_get_mtab(cxt, &tb)) err(EXIT_FAILURE, "failed to read mtab"); while (mnt_table_next_fs(tb, itr, &fs) == 0) { const char *type = mnt_fs_get_fstype(fs); if (!strcmp(type, "debugfs")) { found = 1; break; } } if (found) asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); mnt_free_iter(itr); mnt_free_context(cxt); if (!found) return -1; return 0; } static int gpio_debugfs_get(const char *consumer, int *dir, int *value) { char *debugfs; FILE *f; char *line = NULL; size_t len = 0; char *cur; int found = 0; if (get_debugfs(&debugfs) != 0) err(EXIT_FAILURE, "debugfs is not mounted"); f = fopen(debugfs, "r"); if (!f) err(EXIT_FAILURE, "read from gpio debugfs failed"); /* * gpio-2 ( |gpio-selftest ) in lo */ while (getline(&line, &len, f) != -1) { cur = strstr(line, consumer); if (cur == NULL) continue; cur = strchr(line, ')'); if (!cur) continue; cur += 2; if (!strncmp(cur, "out", 3)) { *dir = OUT; cur += 4; } else if (!strncmp(cur, "in", 2)) { *dir = IN; cur += 4; } if (!strncmp(cur, "hi", 2)) *value = 1; else if (!strncmp(cur, "lo", 2)) *value = 0; found = 1; break; } free(debugfs); fclose(f); free(line); if (!found) return -1; return 0; } static struct gpiochip_info *list_gpiochip(const char *gpiochip_name, int *ret) { struct gpiochip_info *cinfo; struct gpiochip_info *current; const struct dirent *ent; DIR *dp; char *chrdev_name; int fd; int i = 0; cinfo = calloc(sizeof(struct gpiochip_info) * 4, GC_NUM + 1); if (!cinfo) err(EXIT_FAILURE, "gpiochip_info allocation failed"); current = cinfo; dp = opendir("/dev"); if (!dp) { *ret = -errno; goto error_out; } else { *ret = 0; } while (ent = readdir(dp), ent) { if (check_prefix(ent->d_name, "gpiochip")) { *ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name); if (*ret < 0) goto error_out; fd = open(chrdev_name, 0); if (fd == -1) { *ret = -errno; fprintf(stderr, "Failed to open %s\n", chrdev_name); goto error_close_dir; } *ret = ioctl(fd, GPIO_GET_CHIPINFO_IOCTL, current); if (*ret == -1) { perror("Failed to issue CHIPINFO IOCTL\n"); goto error_close_dir; } close(fd); if (strcmp(current->label, gpiochip_name) == 0 || check_prefix(current->label, gpiochip_name)) { *ret = 0; current++; i++; } } } if ((!*ret && i == 0) || *ret < 0) { free(cinfo); cinfo = NULL; } if (!*ret && i > 0) { cinfo = realloc(cinfo, sizeof(struct gpiochip_info) * 4 * i); *ret = i; } error_close_dir: closedir(dp); error_out: if (*ret < 0) err(EXIT_FAILURE, "list gpiochip failed: %s", strerror(*ret)); return cinfo; } int gpio_pin_test(struct gpiochip_info *cinfo, int line, int flag, int value) { struct gpiohandle_data data; unsigned int lines[] = {line}; int fd; int debugfs_dir = IN; int debugfs_value = 0; int ret; data.values[0] = value; ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data, CONSUMER); if (ret < 0) goto fail_out; else fd = ret; ret = gpio_debugfs_get(CONSUMER, &debugfs_dir, &debugfs_value); if (ret) { ret = -EINVAL; goto fail_out; } if (flag & GPIOHANDLE_REQUEST_INPUT) { if (debugfs_dir != IN) { errno = -EINVAL; ret = -errno; } } else if (flag & GPIOHANDLE_REQUEST_OUTPUT) { if (flag & GPIOHANDLE_REQUEST_ACTIVE_LOW) debugfs_value = !debugfs_value; if (!(debugfs_dir == OUT && value == debugfs_value)) errno = -EINVAL; ret = -errno; } gpiotools_release_linehandle(fd); fail_out: if (ret) err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>", cinfo->name, line, flag, value); return ret; } void gpio_pin_tests(struct gpiochip_info *cinfo, unsigned int line) { printf("line<%d>", line); gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 0); printf("."); gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT, 1); printf("."); gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, 0); printf("."); gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_OUTPUT | GPIOHANDLE_REQUEST_ACTIVE_LOW, 1); printf("."); gpio_pin_test(cinfo, line, GPIOHANDLE_REQUEST_INPUT, 0); printf("."); } /* * ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip * Return 0 if successful or exit with EXIT_FAILURE if test failed. * gpio_chip_name_prefix: The prefix of gpiochip you want to test. E.g. * gpio-mockup * is_valid_gpio_chip: Whether the gpio_chip is valid. 1 means valid, * 0 means invalid which could not be found by * list_gpiochip. */ int main(int argc, char *argv[]) { char *prefix; int valid; struct gpiochip_info *cinfo; struct gpiochip_info *current; int i; int ret; if (argc < 3) { printf("Usage: %s prefix is_valid", argv[0]); exit(EXIT_FAILURE); } prefix = argv[1]; valid = strcmp(argv[2], "true") == 0 ? 1 : 0; printf("Test gpiochip %s: ", prefix); cinfo = list_gpiochip(prefix, &ret); if (!cinfo) { if (!valid && ret == 0) { printf("Invalid test successful\n"); ret = 0; goto out; } else { ret = -EINVAL; goto out; } } else if (cinfo && !valid) { ret = -EINVAL; goto out; } current = cinfo; for (i = 0; i < ret; i++) { gpio_pin_tests(current, 0); gpio_pin_tests(current, current->lines - 1); gpio_pin_tests(current, random() % current->lines); current++; } ret = 0; printf("successful\n"); out: if (ret) fprintf(stderr, "gpio<%s> test failed\n", prefix); if (cinfo) free(cinfo); if (ret) exit(EXIT_FAILURE); return ret; } hanged with: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound/soc/au1x/psc-i2s.c')