x86: video: Add coreboot framebuffer support

Add a basic driver for the coreboot framebuffer.

Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/video/Makefile

@@ -39,6 +39,7 @@ COBJS-$(CONFIG_S6E8AX0) += s6e8ax0.o
 COBJS-$(CONFIG_S6E63D6) += s6e63d6.o
 COBJS-$(CONFIG_SED156X) += sed156x.o
 COBJS-$(CONFIG_VIDEO_AMBA) += amba.o
+COBJS-$(CONFIG_VIDEO_COREBOOT) += coreboot_fb.o
 COBJS-$(CONFIG_VIDEO_CT69000) += ct69000.o videomodes.o
 COBJS-$(CONFIG_VIDEO_DA8XX) += da8xx-fb.o videomodes.o
 COBJS-$(CONFIG_VIDEO_MB862xx) += mb862xx.o videomodes.o

drivers/video/coreboot_fb.c

@@ -0,0 +1,101 @@
+/*
+ * coreboot Framebuffer driver.
+ *
+ * Copyright (C) 2011 The Chromium OS authors
+ *
+ * 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 as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/tables.h>
+#include <asm/arch/sysinfo.h>
+#include <video_fb.h>
+#include "videomodes.h"
+
+/*
+ * The Graphic Device
+ */
+GraphicDevice ctfb;
+
+static int parse_coreboot_table_fb(GraphicDevice *gdev)
+{
+	struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
+
+	/* If there is no framebuffer structure, bail out and keep
+	 * running on the serial console.
+	 */
+	if (!fb)
+		return 0;
+
+	gdev->winSizeX = fb->x_resolution;
+	gdev->winSizeY = fb->y_resolution;
+
+	gdev->plnSizeX = fb->x_resolution;
+	gdev->plnSizeY = fb->y_resolution;
+
+	gdev->gdfBytesPP = fb->bits_per_pixel / 8;
+
+	switch (fb->bits_per_pixel) {
+	case 24:
+		gdev->gdfIndex = GDF_32BIT_X888RGB;
+		break;
+	case 16:
+		gdev->gdfIndex = GDF_16BIT_565RGB;
+		break;
+	default:
+		gdev->gdfIndex = GDF__8BIT_INDEX;
+		break;
+	}
+
+	gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
+	gdev->pciBase = (unsigned int)fb->physical_address;
+
+	gdev->frameAdrs = (unsigned int)fb->physical_address;
+	gdev->memSize = fb->bytes_per_line * fb->y_resolution;
+
+	gdev->vprBase = (unsigned int)fb->physical_address;
+	gdev->cprBase = (unsigned int)fb->physical_address;
+
+	return 1;
+}
+
+void *video_hw_init(void)
+{
+	GraphicDevice *gdev = &ctfb;
+	int bits_per_pixel;
+
+	printf("Video: ");
+
+	if (!parse_coreboot_table_fb(gdev)) {
+		printf("No video mode configured in coreboot!\n");
+		return NULL;
+	}
+
+	bits_per_pixel = gdev->gdfBytesPP * 8;
+
+	/* fill in Graphic device struct */
+	sprintf(gdev->modeIdent, "%dx%dx%d", gdev->winSizeX, gdev->winSizeY,
+		 bits_per_pixel);
+	printf("%s\n", gdev->modeIdent);
+
+	memset((void *)gdev->pciBase, 0,
+		gdev->winSizeX * gdev->winSizeY * gdev->gdfBytesPP);
+
+	return (void *)gdev;
+}