From f10c5df4354e9dcf241989c9490f57fcd2ced1fc Mon Sep 17 00:00:00 2001
From: yokota <yokota@FreeBSD.org>
Date: Sat, 9 Jan 1999 02:44:50 +0000
Subject: Add the new keyboard driver and video card driver.  They will be used
 by console drivers.

(They are not yet activated yet.  Wait for announcement later.)
---
 sys/dev/fb/splash.c | 181 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 181 insertions(+)
 create mode 100644 sys/dev/fb/splash.c

(limited to 'sys/dev/fb/splash.c')

diff --git a/sys/dev/fb/splash.c b/sys/dev/fb/splash.c
new file mode 100644
index 0000000..7d0b90e
--- /dev/null
+++ b/sys/dev/fb/splash.c
@@ -0,0 +1,181 @@
+/*-
+ * $Id:$
+ */
+
+#include "splash.h"
+
+#if NSPLASH > 0
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/linker.h>
+
+#include <machine/console.h>
+
+#include <dev/fb/fbreg.h>
+#include <dev/fb/splashreg.h>
+
+/* video adapter and image decoder */
+static video_adapter_t	*splash_adp;
+static splash_decoder_t	*splash_decoder;
+
+/* decoder candidates */
+static int		decoders;
+static splash_decoder_t **decoder_set;
+#define DECODER_ARRAY_DELTA 4
+
+/* splash image data file */
+static void		*splash_image_data;
+static size_t		splash_image_size;
+
+/* console driver callback */
+static int		(*splash_callback)(int);
+
+static int
+splash_find_image(void)
+{
+        caddr_t image_module;
+	caddr_t p;
+
+	if (splash_image_data == NULL) {
+		image_module = preload_search_by_type(SPLASH_IMAGE);
+		if (image_module == NULL)
+			return ENOENT;
+		p = preload_search_info(image_module, MODINFO_ADDR);
+		if (p == NULL)
+			return ENOENT;
+		splash_image_data = *(void **)p;
+		p = preload_search_info(image_module, MODINFO_SIZE);
+		if (p == NULL)
+			return ENOENT;
+		splash_image_size = *(size_t *)p;
+	}
+	return 0;
+}
+
+static int
+splash_test(splash_decoder_t *decoder)
+{
+	if ((*decoder->init)(splash_adp, splash_image_data, splash_image_size))
+		return ENODEV;	/* XXX */
+	if (bootverbose)
+		printf("splash: image decoder found: %s\n", decoder->name);
+	splash_decoder = decoder;
+	if (splash_callback != NULL)
+		(*splash_callback)(SPLASH_INIT);
+	return 0;
+}
+
+int
+splash_register(splash_decoder_t *decoder)
+{
+	splash_decoder_t **p;
+	int i;
+
+	/* only one decoder can be active */
+	if (splash_decoder != NULL)
+		return ENODEV;	/* XXX */
+
+	/* if the splash image is not in memory, abort */
+	splash_find_image();
+	if (bootverbose)
+		printf("splash: image@%p, size:%u\n",
+		       splash_image_data, splash_image_size);
+	if (splash_image_data == NULL)
+		return ENOENT;
+
+	/*
+	 * If the video card has aleady been initialized, test this 
+	 * decoder immediately.
+	 */
+	if (splash_adp != NULL)
+		return splash_test(decoder);
+
+	/* register the decoder for later use */
+	for (i = 0; i < decoders; ++i) {
+		if (decoder_set[i] == NULL)
+			break;
+	}
+	if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
+		p = malloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
+			   M_DEVBUF, M_NOWAIT);
+		if (p == NULL)
+			return ENOMEM;
+		if (decoder_set != NULL)
+			bcopy(decoder_set, p, sizeof(*p)*decoders);
+		free(decoder_set, M_DEVBUF);
+		decoder_set = p;
+		i = decoders++;
+	}
+	decoder_set[i] = decoder;
+	return 0;
+}
+
+int
+splash_unregister(splash_decoder_t *decoder)
+{
+	int error;
+	int i;
+
+	if (splash_decoder == decoder) {
+		if ((error = splash_term(splash_adp)) != 0)
+			return error;
+	}
+	for (i = 0; i < decoders; ++i) {
+		if (decoder_set[i] == decoder) {
+			decoder_set[i] = NULL;
+			break;
+		}
+	}
+	return 0;
+}
+
+int
+splash_init(video_adapter_t *adp, int (*callback)(int))
+{
+	int i;
+
+	splash_adp = adp;
+	splash_callback = callback;
+
+	/* try registered decoders with this adapter and loaded image */
+	splash_decoder = NULL;
+	splash_find_image();
+	if (splash_image_data == NULL)
+		return 0;
+	for (i = 0; i < decoders; ++i) {
+		if (decoder_set[i] == NULL)
+			continue;
+		if (splash_test(decoder_set[i]) == 0)
+			break;
+	}
+	return 0;
+}
+
+int
+splash_term(video_adapter_t *adp)
+{
+	int error = 0;
+
+	if (splash_decoder != NULL) {
+		if (splash_callback != NULL)
+			error = (*splash_callback)(SPLASH_TERM);
+		if (error == 0)
+			error = (*splash_decoder->term)(adp);
+		if (error == 0)
+			splash_decoder = NULL;
+	}
+	return error;
+}
+
+int
+splash(video_adapter_t *adp, int on)
+{
+	if (splash_decoder != NULL)
+		return (*splash_decoder->splash)(adp, on);
+	return ENODEV;
+}
+
+#endif /* NSPLASH > 0 */
-- 
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