1 files changed, 412 insertions, 0 deletions
diff --git a/common/stdio.c b/common/stdio.c
new file mode 100644
index 00000000..1301fd0e
--- /dev/null
+++ b/common/stdio.c
@@ -0,0 +1,412 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * Changes for multibus/multiadapter I2C support.
+ *
+ * (C) Copyright 2000
+ * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
+ */
+
+#include <config.h>
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <malloc.h>
+#include <stdio_dev.h>
+#include <serial.h>
+#include <splash.h>
+
+#if defined(CONFIG_SYS_I2C)
+#include <i2c.h>
+#endif
+
+#include <dm/device-internal.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct stdio_dev devs;
+struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
+char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
+
+#if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
+#define	CONFIG_SYS_DEVICE_NULLDEV	1
+#endif
+
+#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
+#define	CONFIG_SYS_DEVICE_NULLDEV	1
+#endif
+
+#ifdef CONFIG_SYS_DEVICE_NULLDEV
+static void nulldev_putc(struct stdio_dev *dev, const char c)
+{
+	/* nulldev is empty! */
+}
+
+static void nulldev_puts(struct stdio_dev *dev, const char *s)
+{
+	/* nulldev is empty! */
+}
+
+static int nulldev_input(struct stdio_dev *dev)
+{
+	/* nulldev is empty! */
+	return 0;
+}
+#endif
+
+static void stdio_serial_putc(struct stdio_dev *dev, const char c)
+{
+	serial_putc(c);
+}
+
+static void stdio_serial_puts(struct stdio_dev *dev, const char *s)
+{
+	serial_puts(s);
+}
+
+static int stdio_serial_getc(struct stdio_dev *dev)
+{
+	return serial_getc();
+}
+
+static int stdio_serial_tstc(struct stdio_dev *dev)
+{
+	return serial_tstc();
+}
+
+/**************************************************************************
+ * SYSTEM DRIVERS
+ **************************************************************************
+ */
+
+static void drv_system_init (void)
+{
+	struct stdio_dev dev;
+
+	memset (&dev, 0, sizeof (dev));
+
+	strcpy (dev.name, "serial");
+	dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
+	dev.putc = stdio_serial_putc;
+	dev.puts = stdio_serial_puts;
+	dev.getc = stdio_serial_getc;
+	dev.tstc = stdio_serial_tstc;
+	stdio_register (&dev);
+
+#ifdef CONFIG_SYS_DEVICE_NULLDEV
+	memset (&dev, 0, sizeof (dev));
+
+	strcpy (dev.name, "nulldev");
+	dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
+	dev.putc = nulldev_putc;
+	dev.puts = nulldev_puts;
+	dev.getc = nulldev_input;
+	dev.tstc = nulldev_input;
+
+	stdio_register (&dev);
+#endif
+}
+
+/**************************************************************************
+ * DEVICES
+ **************************************************************************
+ */
+struct list_head* stdio_get_list(void)
+{
+	return &(devs.list);
+}
+
+#ifdef CONFIG_DM_VIDEO
+/**
+ * stdio_probe_device() - Find a device which provides the given stdio device
+ *
+ * This looks for a device of the given uclass which provides a particular
+ * stdio device. It is currently really only useful for UCLASS_VIDEO.
+ *
+ * Ultimately we want to be able to probe a device by its stdio name. At
+ * present devices register in their probe function (for video devices this
+ * is done in vidconsole_post_probe()) and we don't know what name they will
+ * use until they do so.
+ * TODO(sjg@chromium.org): We should be able to determine the name before
+ * probing, and probe the required device.
+ *
+ * @name:	stdio device name (e.g. "vidconsole")
+ * id:		Uclass ID of device to look for (e.g. UCLASS_VIDEO)
+ * @sdevp:	Returns stdout device, if found, else NULL
+ * @return 0 if found, -ENOENT if no device found with that name, other -ve
+ *	   on other error
+ */
+static int stdio_probe_device(const char *name, enum uclass_id id,
+			      struct stdio_dev **sdevp)
+{
+	struct stdio_dev *sdev;
+	struct udevice *dev;
+	int seq, ret;
+
+	*sdevp = NULL;
+	seq = trailing_strtoln(name, NULL);
+	if (seq == -1)
+		seq = 0;
+	ret = uclass_get_device_by_seq(id, seq, &dev);
+	if (ret == -ENODEV)
+		ret = uclass_first_device_err(id, &dev);
+	if (ret) {
+		debug("No %s device for seq %d (%s)\n", uclass_get_name(id),
+		      seq, name);
+		return ret;
+	}
+	/* The device should be be the last one registered */
+	sdev = list_empty(&devs.list) ? NULL :
+			list_last_entry(&devs.list, struct stdio_dev, list);
+	if (!sdev || strcmp(sdev->name, name)) {
+		debug("Device '%s' did not register with stdio as '%s'\n",
+		      dev->name, name);
+		return -ENOENT;
+	}
+	*sdevp = sdev;
+
+	return 0;
+}
+#endif
+
+struct stdio_dev *stdio_get_by_name(const char *name)
+{
+	struct list_head *pos;
+	struct stdio_dev *sdev;
+
+	if (!name)
+		return NULL;
+
+	list_for_each(pos, &(devs.list)) {
+		sdev = list_entry(pos, struct stdio_dev, list);
+		if (strcmp(sdev->name, name) == 0)
+			return sdev;
+	}
+#ifdef CONFIG_DM_VIDEO
+	/*
+	 * We did not find a suitable stdio device. If there is a video
+	 * driver with a name starting with 'vidconsole', we can try probing
+	 * that in the hope that it will produce the required stdio device.
+	 *
+	 * This function is sometimes called with the entire value of
+	 * 'stdout', which may include a list of devices separate by commas.
+	 * Obviously this is not going to work, so we ignore that case. The
+	 * call path in that case is console_init_r() -> search_device() ->
+	 * stdio_get_by_name().
+	 */
+	if (!strncmp(name, "vidconsole", 10) && !strchr(name, ',') &&
+	    !stdio_probe_device(name, UCLASS_VIDEO, &sdev))
+		return sdev;
+#endif
+
+	return NULL;
+}
+
+struct stdio_dev* stdio_clone(struct stdio_dev *dev)
+{
+	struct stdio_dev *_dev;
+
+	if(!dev)
+		return NULL;
+
+	_dev = calloc(1, sizeof(struct stdio_dev));
+
+	if(!_dev)
+		return NULL;
+
+	memcpy(_dev, dev, sizeof(struct stdio_dev));
+
+	return _dev;
+}
+
+int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp)
+{
+	struct stdio_dev *_dev;
+
+	_dev = stdio_clone(dev);
+	if(!_dev)
+		return -ENODEV;
+	list_add_tail(&(_dev->list), &(devs.list));
+	if (devp)
+		*devp = _dev;
+
+	return 0;
+}
+
+int stdio_register(struct stdio_dev *dev)
+{
+	return stdio_register_dev(dev, NULL);
+}
+
+/* deregister the device "devname".
+ * returns 0 if success, -1 if device is assigned and 1 if devname not found
+ */
+#if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
+int stdio_deregister_dev(struct stdio_dev *dev, int force)
+{
+	int l;
+	struct list_head *pos;
+	char temp_names[3][16];
+
+	/* get stdio devices (ListRemoveItem changes the dev list) */
+	for (l=0 ; l< MAX_FILES; l++) {
+		if (stdio_devices[l] == dev) {
+			if (force) {
+				strcpy(temp_names[l], "nulldev");
+				continue;
+			}
+			/* Device is assigned -> report error */
+			return -1;
+		}
+		memcpy (&temp_names[l][0],
+			stdio_devices[l]->name,
+			sizeof(temp_names[l]));
+	}
+
+	list_del(&(dev->list));
+	free(dev);
+
+	/* reassign Device list */
+	list_for_each(pos, &(devs.list)) {
+		dev = list_entry(pos, struct stdio_dev, list);
+		for (l=0 ; l< MAX_FILES; l++) {
+			if(strcmp(dev->name, temp_names[l]) == 0)
+				stdio_devices[l] = dev;
+		}
+	}
+	return 0;
+}
+
+int stdio_deregister(const char *devname, int force)
+{
+	struct stdio_dev *dev;
+
+	dev = stdio_get_by_name(devname);
+
+	if (!dev) /* device not found */
+		return -ENODEV;
+
+	return stdio_deregister_dev(dev, force);
+}
+#endif /* CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER) */
+
+int stdio_init_tables(void)
+{
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+	/* already relocated for current ARM implementation */
+	ulong relocation_offset = gd->reloc_off;
+	int i;
+
+	/* relocate device name pointers */
+	for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
+		stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
+						relocation_offset);
+	}
+#endif /* CONFIG_NEEDS_MANUAL_RELOC */
+
+	/* Initialize the list */
+	INIT_LIST_HEAD(&(devs.list));
+
+	return 0;
+}
+
+int stdio_add_devices(void)
+{
+#ifdef CONFIG_DM_KEYBOARD
+	struct udevice *dev;
+	struct uclass *uc;
+	int ret;
+
+	/*
+	 * For now we probe all the devices here. At some point this should be
+	 * done only when the devices are required - e.g. we have a list of
+	 * input devices to start up in the stdin environment variable. That
+	 * work probably makes more sense when stdio itself is converted to
+	 * driver model.
+	 *
+	 * TODO(sjg@chromium.org): Convert changing uclass_first_device() etc.
+	 * to return the device even on error. Then we could use that here.
+	 */
+	ret = uclass_get(UCLASS_KEYBOARD, &uc);
+	if (ret)
+		return ret;
+
+	/* Don't report errors to the caller - assume that they are non-fatal */
+	uclass_foreach_dev(dev, uc) {
+		ret = device_probe(dev);
+		if (ret)
+			printf("Failed to probe keyboard '%s'\n", dev->name);
+	}
+#endif
+#ifdef CONFIG_SYS_I2C
+	i2c_init_all();
+#else
+#endif
+#ifdef CONFIG_DM_VIDEO
+	/*
+	 * If the console setting is not in environment variables then
+	 * console_init_r() will not be calling iomux_doenv() (which calls
+	 * search_device()). So we will not dynamically add devices by
+	 * calling stdio_probe_device().
+	 *
+	 * So just probe all video devices now so that whichever one is
+	 * required will be available.
+	 */
+	ulong start;
+
+	start = get_timer(0);
+#ifndef CONFIG_SYS_CONSOLE_IS_IN_ENV
+	struct udevice *vdev;
+# ifndef CONFIG_DM_KEYBOARD
+	int ret;
+# endif
+
+	for (ret = uclass_first_device(UCLASS_VIDEO, &vdev);
+	     vdev;
+	     ret = uclass_next_device(&vdev))
+		;
+	if (ret)
+		printf("%s: Video device failed (ret=%d)\n", __func__, ret);
+#endif /* !CONFIG_SYS_CONSOLE_IS_IN_ENV */
+#if defined(CONFIG_SPLASH_SCREEN) && defined(CONFIG_CMD_BMP)
+	splash_display();
+#endif /* CONFIG_SPLASH_SCREEN && CONFIG_CMD_BMP */
+	printf("splash screen startup cost %lu ms\n", get_timer(start));
+#else
+# if defined(CONFIG_LCD)
+	drv_lcd_init ();
+# endif
+# if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
+	drv_video_init ();
+# endif
+#endif /* CONFIG_DM_VIDEO */
+#if defined(CONFIG_KEYBOARD) && !defined(CONFIG_DM_KEYBOARD)
+	drv_keyboard_init ();
+#endif
+	drv_system_init ();
+	serial_stdio_init ();
+#ifdef CONFIG_USB_TTY
+	drv_usbtty_init ();
+#endif
+#ifdef CONFIG_NETCONSOLE
+	drv_nc_init ();
+#endif
+#ifdef CONFIG_JTAG_CONSOLE
+	drv_jtag_console_init ();
+#endif
+#ifdef CONFIG_CBMEM_CONSOLE
+	cbmemc_init();
+#endif
+
+	return 0;
+}
+
+int stdio_init(void)
+{
+	stdio_init_tables();
+	stdio_add_devices();
+
+	return 0;
+}