[U-Boot] [PATCH 03/12] x86: video: Add coreboot framebuffer support
Simon Glass
sjg at chromium.org
Sun Oct 21 00:33:07 CEST 2012
From: Stefan Reinauer <reinauer at chromium.org>
Add a basic driver for the coreboot framebuffer.
Signed-off-by: Stefan Reinauer <reinauer at chromium.org>
Signed-off-by: Simon Glass <sjg at chromium.org>
---
drivers/video/Makefile | 1 +
drivers/video/coreboot_fb.c | 102 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 103 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/coreboot_fb.c
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index ebb6da8..cc3022a 100644
--- a/drivers/video/Makefile
+++ b/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
diff --git a/drivers/video/coreboot_fb.c b/drivers/video/coreboot_fb.c
new file mode 100644
index 0000000..a99188a
--- /dev/null
+++ b/drivers/video/coreboot_fb.c
@@ -0,0 +1,102 @@
+/*
+ * 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/ic/coreboot/tables.h>
+#include <asm/ic/coreboot/sysinfo.h>
+#include <video_fb.h>
+#include "videomodes.h"
+
+/*
+ * The Graphic Device
+ */
+GraphicDevice ctfb;
+
+static int parse_coreboot_table_fb(GraphicDevice *gd)
+{
+ 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;
+
+ gd->winSizeX = fb->x_resolution;
+ gd->winSizeY = fb->y_resolution;
+
+ gd->plnSizeX = fb->x_resolution;
+ gd->plnSizeY = fb->y_resolution;
+
+ gd->gdfBytesPP = fb->bits_per_pixel / 8;
+
+ switch (fb->bits_per_pixel) {
+ case 24:
+ gd->gdfIndex = GDF_32BIT_X888RGB;
+ break;
+ case 16:
+ gd->gdfIndex = GDF_16BIT_565RGB;
+ break;
+ default:
+ gd->gdfIndex = GDF__8BIT_INDEX;
+ break;
+ }
+
+ gd->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
+ gd->pciBase = (unsigned int)fb->physical_address;
+
+ gd->frameAdrs = (unsigned int)fb->physical_address;
+ gd->memSize = fb->bytes_per_line * fb->y_resolution;
+
+ gd->vprBase = (unsigned int)fb->physical_address;
+ gd->cprBase = (unsigned int)fb->physical_address;
+
+ return 1;
+}
+
+void *video_hw_init(void)
+{
+ GraphicDevice *gd = &ctfb;
+ int bits_per_pixel;
+
+ printf("Video: ");
+
+ if (!parse_coreboot_table_fb(gd)) {
+ printf("No video mode configured in coreboot!\n");
+ return NULL;
+ }
+
+ bits_per_pixel = gd->gdfBytesPP * 8;
+
+ /* fill in Graphic device struct */
+ sprintf(gd->modeIdent, "%dx%dx%d", gd->winSizeX, gd->winSizeY,
+ bits_per_pixel);
+ printf("%s\n", gd->modeIdent);
+
+ memset((void *)gd->pciBase, 0,
+ gd->winSizeX * gd->winSizeY * gd->gdfBytesPP);
+
+ return (void *)gd;
+}
+
--
1.7.7.3
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