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barebox/commands/of_display_timings.c

165 lines
3.8 KiB
C

/*
* of_display_timings.c - list and select display_timings
*
* Copyright (c) 2014 Teresa Gámez <t.gamez@phytec.de> PHYTEC Messtechnik GmbH
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* 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.
*/
#include <common.h>
#include <filetype.h>
#include <libfile.h>
#include <of.h>
#include <command.h>
#include <malloc.h>
#include <complete.h>
#include <asm/byteorder.h>
#include <getopt.h>
#include <linux/err.h>
#include <string.h>
static int of_display_timing(struct device_node *root, void *timingpath)
{
int ret = 0;
struct device_node *display;
display = of_find_node_by_path_from(root, timingpath);
if (!display) {
pr_err("Path to display-timings is not vaild.\n");
ret = -EINVAL;
goto out;
}
ret = of_set_property_to_child_phandle(display, "native-mode");
if (ret)
pr_err("Could not set display\n");
out:
return ret;
}
static int do_of_display_timings(int argc, char *argv[])
{
int opt;
int list = 0;
int selected = 0;
struct device_node *root = NULL;
struct device_node *display = NULL;
struct device_node *timings = NULL;
char *timingpath = NULL;
char *dtbfile = NULL;
while ((opt = getopt(argc, argv, "sS:lf:")) > 0) {
switch (opt) {
case 'l':
list = 1;
break;
case 'f':
dtbfile = optarg;
break;
case 's':
selected = 1;
break;
case 'S':
timingpath = xzalloc(strlen(optarg) + 1);
strcpy(timingpath, optarg);
break;
default:
return COMMAND_ERROR_USAGE;
}
}
/* Check if external dtb given */
if (dtbfile) {
void *fdt;
size_t size;
fdt = read_file(dtbfile, &size);
if (!fdt) {
pr_err("unable to read %s: %s\n", dtbfile,
strerror(errno));
return -errno;
}
if (file_detect_type(fdt, size) != filetype_oftree) {
pr_err("%s is not a oftree file.\n", dtbfile);
free(fdt);
return -EINVAL;
}
root = of_unflatten_dtb(fdt);
free(fdt);
if (IS_ERR(root))
return PTR_ERR(root);
} else {
root = of_get_root_node();
}
if (list) {
int found = 0;
const char *node = "display-timings";
for_each_node_by_name_from(display, root, node) {
for_each_child_of_node(display, timings) {
printf("%s\n", timings->full_name);
found = 1;
}
}
if (!found)
printf("No display-timings found.\n");
}
if (selected) {
int found = 0;
const char *node = "display-timings";
for_each_node_by_name_from(display, root, node) {
timings = of_parse_phandle_from(display, root,
"native-mode", 0);
if (!timings)
continue;
printf("%s\n", timings->full_name);
found = 1;
}
if (!found)
printf("No selected display-timings found.\n");
}
if (timingpath)
of_register_fixup(of_display_timing, timingpath);
return 0;
}
BAREBOX_CMD_HELP_START(of_display_timings)
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT("-l", "list path of all available display-timings\n")
BAREBOX_CMD_HELP_OPT("-s", "list path of all selected display-timings\n")
BAREBOX_CMD_HELP_OPT("-S path", "select display-timings and register oftree fixup\n")
BAREBOX_CMD_HELP_OPT("-f dtb", "work on dtb. Has no effect on -s option\n")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(of_display_timings)
.cmd = do_of_display_timings,
BAREBOX_CMD_DESC("print and select display-timings")
BAREBOX_CMD_OPTS("[-ls] [-S path] [-f dtb]")
BAREBOX_CMD_GROUP(CMD_GRP_MISC)
BAREBOX_CMD_COMPLETE(devicetree_file_complete)
BAREBOX_CMD_HELP(cmd_of_display_timings_help)
BAREBOX_CMD_END