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authorJack Rosenthal <jrosenth@chromium.org>2021-11-04 12:11:58 -0600
committerCommit Bot <commit-bot@chromium.org>2021-11-05 04:22:34 +0000
commit252457d4b21f46889eebad61d4c0a65331919cec (patch)
tree01856c4d31d710b20e85a74c8d7b5836e35c3b98 /util/lbplay.c
parent08f5a1e6fc2c9467230444ac9b582dcf4d9f0068 (diff)
downloadchrome-ec-stabilize-14589.B-ish.tar.gz
In the interest of making long-term branch maintenance incur as little technical debt on us as possible, we should not maintain any files on the branch we are not actually using. This has the added effect of making it extremely clear when merging CLs from the main branch when changes have the possibility to affect us. The follow-on CL adds a convenience script to actually pull updates from the main branch and generate a CL for the update. BUG=b:204206272 BRANCH=ish TEST=make BOARD=arcada_ish && make BOARD=drallion_ish Signed-off-by: Jack Rosenthal <jrosenth@chromium.org> Change-Id: I17e4694c38219b5a0823e0a3e55a28d1348f4b18 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3262038 Reviewed-by: Jett Rink <jettrink@chromium.org> Reviewed-by: Tom Hughes <tomhughes@chromium.org>
Diffstat (limited to 'util/lbplay.c')
-rw-r--r--util/lbplay.c165
1 files changed, 0 insertions, 165 deletions
diff --git a/util/lbplay.c b/util/lbplay.c
deleted file mode 100644
index 9ab0564b74..0000000000
--- a/util/lbplay.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/* Copyright 2014 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <string.h>
-#include <strings.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#define LIGHTBAR "/sys/devices/virtual/chromeos/cros_ec/lightbar"
-
-int main(int argc, char **argv)
-{
- int major, minor, fd_v;
- int i, tries, fd_s, fd_l;
- char buf[80];
- int ret = 1;
-
- /* Check version */
- fd_v = open(LIGHTBAR "/version", O_RDONLY);
- if (fd_v < 0) {
- perror("can't open version file");
- goto out;
- }
- ret = read(fd_v, buf, sizeof(buf) - 1);
- if (ret <= 0) {
- perror("can't read version");
- close(fd_v);
- goto out;
- }
- buf[ret] = '\0';
- close(fd_v);
-
- errno = 0;
- /* Expect "MAJOR MINOR" */
- if (2 != sscanf(buf, "%d %d", &major, &minor)) {
- if (errno)
- perror("can't parse version string");
- else
- fprintf(stderr, "can't parse version string\n");
- goto out;
- }
- /* Pixel is "0 0". Minor change will be compatible, Major may not */
- if (major != 0) {
- fprintf(stderr, "Don't know how to handle version %d.%d\n",
- major, minor);
- goto out;
- }
-
- /* Take over lightbar sequencing. */
- fd_s = open(LIGHTBAR "/sequence", O_RDWR | O_SYNC);
- if (fd_s < 0) {
- perror("can't open sequence control");
- goto out;
- }
-
- /* NOTE: Cooperative locking only. Rude programs may not play nice. */
- if (flock(fd_s, LOCK_EX | LOCK_NB) < 0) {
- perror("can't lock sequence control");
- goto out_close;
- }
-
- /*
- * If power events are changing the sequence our request to stop may
- * be missed, so try a few times before giving up.
- *
- * Note that every write to a control file should be prefaced with an
- * lseek() to the beginning. sysfs files don't work quite like normal
- * files.
- */
- tries = 3;
- while (1) {
- lseek(fd_s, 0, SEEK_SET);
- if (read(fd_s, buf, sizeof(buf)) <= 0) {
- perror("can't read sequence control");
- goto out_unlock;
- }
-
- if (!strncasecmp(buf, "stop", 4))
- break;
-
- if (!tries--) {
- fprintf(stderr, "couldn't get EC to stop\n");
- goto out_unlock;
- }
-
- lseek(fd_s, 0, SEEK_SET);
- strcpy(buf, "stop");
- if (write(fd_s, buf, strlen(buf) + 1) <= 0) {
- perror("can't write sequence control");
- goto out_unlock;
- }
- }
-
- /* Turn the brightness all the way up */
- fd_l = open(LIGHTBAR "/brightness", O_WRONLY | O_SYNC);
- if (fd_l < 0) {
- perror("can't open brightness control");
- goto out_run;
- }
- strcpy(buf, "255");
- if (write(fd_l, buf, strlen(buf) + 1) < 0) {
- perror("can't write brightness control");
- goto out_led;
- }
- close(fd_l);
-
- /* Now let's drive the colors. */
- fd_l = open(LIGHTBAR "/led_rgb", O_WRONLY | O_SYNC);
- if (fd_l < 0) {
- perror("can't open led control");
- goto out_run;
- }
-
- /* Cycle through some colors. We can update multiple LEDs at once,
- * but there's a limit on how often we can send commands to the
- * lightbar. Going too fast will block, although buffering combined
- * with lseek() may just cause data to be lost. Read "/interval_msec"
- * to see what the limit is. The default is 50msec (20Hz).
- */
- for (i = 0; i < 256; i += 4) {
- sprintf(buf, "0 %d %d %d 1 %d %d %d 2 %d %d %d 3 %d %d %d",
- i, 0, 0,
- 0, 0, i,
- 255-i, 255, 0,
- 0, 255, 255-i);
- lseek(fd_l, 0, SEEK_SET);
- if (write(fd_l, buf, strlen(buf) + 1) < 0)
- perror("write to led control");
-
- usleep(100000);
- }
-
- /* all white */
- strcpy(buf, "4 255 255 255");
- lseek(fd_l, 0, SEEK_SET);
- if (write(fd_l, buf, strlen(buf) + 1) < 0)
- perror("write to led control");
-
- usleep(400000);
-
- /* Done. */
- ret = 0;
-out_led:
- close(fd_l);
-out_run:
- /* Let EC drive lightbar again */
- strcpy(buf, "run");
- lseek(fd_s, 0, SEEK_SET);
- if (write(fd_s, buf, strlen(buf) + 1) < 0)
- perror("write to sequence control");
-out_unlock:
- flock(fd_s, LOCK_UN);
-out_close:
- close(fd_s);
-out:
- return ret;
-}