#include <dm.h>
#include <environment.h>
#include <errno.h>
-#include <fdtdec.h>
#include <os.h>
#include <serial.h>
#include <stdio_dev.h>
#include <watchdog.h>
#include <dm/lists.h>
#include <dm/device-internal.h>
+#include <dm/of_access.h>
DECLARE_GLOBAL_DATA_PTR;
*/
static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
-#ifndef CONFIG_SYS_MALLOC_F_LEN
-#error "Serial is required before relocation - define CONFIG_SYS_MALLOC_F_LEN to make this work"
+#if !CONFIG_VAL(SYS_MALLOC_F_LEN)
+#error "Serial is required before relocation - define CONFIG_$(SPL_)SYS_MALLOC_F_LEN to make this work"
#endif
-static void serial_find_console_or_panic(void)
+static int serial_check_stdout(const void *blob, struct udevice **devp)
{
- struct udevice *dev;
-
-#ifdef CONFIG_OF_CONTROL
int node;
/* Check for a chosen console */
- node = fdtdec_get_chosen_node(gd->fdt_blob, "stdout-path");
- if (node < 0)
- node = fdt_path_offset(gd->fdt_blob, "console");
- if (!uclass_get_device_by_of_offset(UCLASS_SERIAL, node, &dev)) {
- gd->cur_serial_dev = dev;
- return;
+ 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 the console is not marked to be bound before relocation, bind it
+ * anyway.
*/
- if (node > 0 &&
- !lists_bind_fdt(gd->dm_root, gd->fdt_blob, node, &dev)) {
- if (!device_probe(dev)) {
+ 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;
+#ifdef CONFIG_SERIAL_SEARCH_ALL
+ int ret;
+#endif
+
+ if (CONFIG_IS_ENABLED(OF_PLATDATA)) {
+ uclass_first_device(UCLASS_SERIAL, &dev);
+ if (dev) {
gd->cur_serial_dev = dev;
return;
}
+ } else if (CONFIG_IS_ENABLED(OF_CONTROL) && blob) {
+ /* Live tree has support for stdout */
+ if (of_live_active()) {
+ struct device_node *np = of_get_stdout();
+
+ if (np && !uclass_get_device_by_ofnode(UCLASS_SERIAL,
+ np_to_ofnode(np), &dev)) {
+ gd->cur_serial_dev = dev;
+ return;
+ }
+ } else {
+ if (!serial_check_stdout(blob, &dev)) {
+ gd->cur_serial_dev = dev;
+ return;
+ }
+ }
}
-#endif
- /*
- * 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).
- */
+ 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 working 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))
- panic_str("No serial driver found");
+
+#ifdef CONFIG_SERIAL_SEARCH_ALL
+ if (!uclass_get_device_by_seq(UCLASS_SERIAL, INDEX, &dev) ||
+ !uclass_get_device(UCLASS_SERIAL, INDEX, &dev)) {
+ if (dev->flags & DM_FLAG_ACTIVATED) {
+ gd->cur_serial_dev = dev;
+ return;
+ }
+ }
+
+ /* Search for any working device */
+ for (ret = uclass_first_device_check(UCLASS_SERIAL, &dev);
+ dev;
+ ret = uclass_next_device_check(&dev)) {
+ if (!ret) {
+ /* Device did succeed probing */
+ gd->cur_serial_dev = dev;
+ return;
+ }
+ }
+#else
+ 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;
+ }
+#endif
+
#undef INDEX
- gd->cur_serial_dev = dev;
+ }
+
+#ifdef CONFIG_REQUIRE_SERIAL_CONSOLE
+ panic_str("No serial driver found");
+#endif
}
/* Called prior to relocation */
/* Called after relocation */
void serial_initialize(void)
{
- serial_find_console_or_panic();
+ serial_init();
}
static void _serial_putc(struct udevice *dev, char ch)
struct dm_serial_ops *ops = serial_get_ops(dev);
int err;
+ if (ch == '\n')
+ _serial_putc(dev, '\r');
+
do {
err = ops->putc(dev, ch);
} while (err == -EAGAIN);
- if (ch == '\n')
- _serial_putc(dev, '\r');
}
static void _serial_puts(struct udevice *dev, const char *str)
_serial_putc(dev, *str++);
}
-static int _serial_getc(struct udevice *dev)
+static int __serial_getc(struct udevice *dev)
{
struct dm_serial_ops *ops = serial_get_ops(dev);
int err;
return err >= 0 ? err : 0;
}
-static int _serial_tstc(struct udevice *dev)
+static int __serial_tstc(struct udevice *dev)
{
struct dm_serial_ops *ops = serial_get_ops(dev);
return 1;
}
+#if CONFIG_IS_ENABLED(SERIAL_RX_BUFFER)
+static int _serial_tstc(struct udevice *dev)
+{
+ struct serial_dev_priv *upriv = dev_get_uclass_priv(dev);
+
+ /* Read all available chars into the RX buffer */
+ while (__serial_tstc(dev)) {
+ upriv->buf[upriv->wr_ptr++] = __serial_getc(dev);
+ upriv->wr_ptr %= CONFIG_SERIAL_RX_BUFFER_SIZE;
+ }
+
+ return upriv->rd_ptr != upriv->wr_ptr ? 1 : 0;
+}
+
+static int _serial_getc(struct udevice *dev)
+{
+ struct serial_dev_priv *upriv = dev_get_uclass_priv(dev);
+ char val;
+
+ val = upriv->buf[upriv->rd_ptr++];
+ upriv->rd_ptr %= CONFIG_SERIAL_RX_BUFFER_SIZE;
+
+ return val;
+}
+
+#else /* CONFIG_IS_ENABLED(SERIAL_RX_BUFFER) */
+
+static int _serial_getc(struct udevice *dev)
+{
+ return __serial_getc(dev);
+}
+
+static int _serial_tstc(struct udevice *dev)
+{
+ return __serial_tstc(dev);
+}
+#endif /* CONFIG_IS_ENABLED(SERIAL_RX_BUFFER) */
+
void serial_putc(char ch)
{
- _serial_putc(gd->cur_serial_dev, ch);
+ if (gd->cur_serial_dev)
+ _serial_putc(gd->cur_serial_dev, ch);
}
void serial_puts(const char *str)
{
- _serial_puts(gd->cur_serial_dev, str);
+ if (gd->cur_serial_dev)
+ _serial_puts(gd->cur_serial_dev, str);
}
int serial_getc(void)
{
+ if (!gd->cur_serial_dev)
+ return 0;
+
return _serial_getc(gd->cur_serial_dev);
}
int serial_tstc(void)
{
+ if (!gd->cur_serial_dev)
+ return 0;
+
return _serial_tstc(gd->cur_serial_dev);
}
void serial_setbrg(void)
{
- struct dm_serial_ops *ops = serial_get_ops(gd->cur_serial_dev);
+ struct dm_serial_ops *ops;
+
+ if (!gd->cur_serial_dev)
+ return;
+ ops = serial_get_ops(gd->cur_serial_dev);
if (ops->setbrg)
ops->setbrg(gd->cur_serial_dev, gd->baudrate);
}
{
}
-#ifdef CONFIG_DM_STDIO
+#if defined(CONFIG_DM_STDIO)
+
+#if CONFIG_IS_ENABLED(SERIAL_PRESENT)
static void serial_stub_putc(struct stdio_dev *sdev, const char ch)
{
_serial_putc(sdev->priv, ch);
}
#endif
-void serial_stub_puts(struct stdio_dev *sdev, const char *str)
+static void serial_stub_puts(struct stdio_dev *sdev, const char *str)
{
_serial_puts(sdev->priv, str);
}
-int serial_stub_getc(struct stdio_dev *sdev)
+static int serial_stub_getc(struct stdio_dev *sdev)
{
return _serial_getc(sdev->priv);
}
-int serial_stub_tstc(struct stdio_dev *sdev)
+static int serial_stub_tstc(struct stdio_dev *sdev)
{
return _serial_tstc(sdev->priv);
}
+#endif
/**
* on_baudrate() - Update the actual baudrate when the env var changes
}
U_BOOT_ENV_CALLBACK(baudrate, on_baudrate);
+#if CONFIG_IS_ENABLED(SERIAL_PRESENT)
static int serial_post_probe(struct udevice *dev)
{
struct dm_serial_ops *ops = serial_get_ops(dev);
memset(&sdev, '\0', sizeof(sdev));
strncpy(sdev.name, dev->name, sizeof(sdev.name));
- sdev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
+ sdev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_DM;
sdev.priv = dev;
sdev.putc = serial_stub_putc;
sdev.puts = serial_stub_puts;
sdev.getc = serial_stub_getc;
sdev.tstc = serial_stub_tstc;
+
+#if CONFIG_IS_ENABLED(SERIAL_RX_BUFFER)
+ /* Allocate the RX buffer */
+ upriv->buf = malloc(CONFIG_SERIAL_RX_BUFFER_SIZE);
+#endif
+
stdio_register_dev(&sdev, &upriv->sdev);
#endif
return 0;
static int serial_pre_remove(struct udevice *dev)
{
-#ifdef CONFIG_SYS_STDIO_DEREGISTER
+#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
struct serial_dev_priv *upriv = dev_get_uclass_priv(dev);
- if (stdio_deregister_dev(upriv->sdev, 0))
+ if (stdio_deregister_dev(upriv->sdev, true))
return -EPERM;
#endif
.pre_remove = serial_pre_remove,
.per_device_auto_alloc_size = sizeof(struct serial_dev_priv),
};
+#endif
projects / u-boot / blobdiff