int fdtdec_get_chosen_node(const void *blob, const char *name)
{
const char *prop;
prop = fdtdec_get_chosen_prop(blob, name);
if (!prop)
return -FDT_ERR_NOTFOUND;
return fdt_path_offset(blob, prop);
}
static int serial_check_stdout(const void *blob, struct udevice **devp)
{
int node;
/* Check for a chosen console */
node = fdtdec_get_chosen_node(blob, "stdout-path");
if (node < 0) {
const char *str, *p, *name;
/*
* Deal with things like
* stdout-path = "serial0:115200n8";
*
* We need to look up the alias and then follow it to the
* correct node.
*/
str = fdtdec_get_chosen_prop(blob, "stdout-path");
if (str) {
p = strchr(str, ':');
name = fdt_get_alias_namelen(blob, str,
p ? p - str : strlen(str));
if (name)
node = fdt_path_offset(blob, name);
}
}
if (node < 0)
node = fdt_path_offset(blob, "console");
if (!uclass_get_device_by_of_offset(UCLASS_SERIAL, node, devp))
return 0;
/*
* If the console is not marked to be bound before relocation, bind it
* anyway.
*/
if (node > 0 && !lists_bind_fdt(gd->dm_root, offset_to_ofnode(node),
devp)) {
if (!device_probe(*devp))
return 0;
}
return -ENODEV;
}
static void serial_find_console_or_panic(void)
{
const void *blob = gd->fdt_blob;
struct udevice *dev;
int node;
if (CONFIG_IS_ENABLED(OF_CONTROL) && blob) {
/* Check for a chosen console */
node = fdtdec_get_chosen_node(blob, "stdout-path");
if (node < 0) {
const char *str, *p, *name;
/*
* Deal with things like
* stdout-path = "serial0:115200n8";
*
* We need to look up the alias and then follow it to
* the correct node.
*/
str = fdtdec_get_chosen_prop(blob, "stdout-path");
if (str) {
p = strchr(str, ':');
name = fdt_get_alias_namelen(blob, str,
p ? p - str : strlen(str));
if (name)
node = fdt_path_offset(blob, name);
}
}
if (node < 0)
node = fdt_path_offset(blob, "console");
if (!uclass_get_device_by_of_offset(UCLASS_SERIAL, node,
&dev)) {
gd->cur_serial_dev = dev;
return;
}
/*
* If the console is not marked to be bound before relocation,
* bind it anyway.
*/
if (node > 0 &&
!lists_bind_fdt(gd->dm_root, blob, node, &dev)) {
if (!device_probe(dev)) {
gd->cur_serial_dev = dev;
return;
}
}
}
if (!SPL_BUILD || !CONFIG_IS_ENABLED(OF_CONTROL) || !blob) {
/*
* Try to use CONFIG_CONS_INDEX if available (it is numbered
* from 1!).
*
* Failing that, get the device with sequence number 0, or in
* extremis just the first serial device we can find. But we
* insist on having a console (even if it is silent).
*/
#ifdef CONFIG_CONS_INDEX
#define INDEX (CONFIG_CONS_INDEX - 1)
#else
#define INDEX 0
#endif
if (!uclass_get_device_by_seq(UCLASS_SERIAL, INDEX, &dev) ||
!uclass_get_device(UCLASS_SERIAL, INDEX, &dev) ||
(!uclass_first_device(UCLASS_SERIAL, &dev) && dev)) {
gd->cur_serial_dev = dev;
return;
}
#undef INDEX
}
#ifdef CONFIG_REQUIRE_SERIAL_CONSOLE
panic_str("No serial driver found");
#endif
}
