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authorNils Jacobs <njacobs8@adsltotaal.nl>2012-01-25 22:26:35 +0100
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-01-26 22:15:56 +0100
commit976f8cc1e29daee35a2f92f97be59a4838949c43 (patch)
tree9a78e00e262bd324434a43df930b506d224cfd20 /src/northbridge/amd/gx2
parentacf2aab54b8264b658209d2697ae8b5e26f1b496 (diff)
downloadcoreboot-976f8cc1e29daee35a2f92f97be59a4838949c43.tar.xz
Make Geode GX2 VGA setup work.
Add MSR register write for VGA memory setup Add missing license Add bit explanation Change-Id: I1cb36eeccd84f0056c829f50d9864047654ce906 Signed-off-by: Nils Jacobs <njacobs8@adsltotaal.nl> Reviewed-on: http://review.coreboot.org/580 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/northbridge/amd/gx2')
-rw-r--r--src/northbridge/amd/gx2/grphinit.c83
1 files changed, 78 insertions, 5 deletions
diff --git a/src/northbridge/amd/gx2/grphinit.c b/src/northbridge/amd/gx2/grphinit.c
index fce1190f17..b333c22a1e 100644
--- a/src/northbridge/amd/gx2/grphinit.c
+++ b/src/northbridge/amd/gx2/grphinit.c
@@ -1,18 +1,91 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ * Copyright (C) 2012 Nils Jacobs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
#include <arch/io.h>
#include <stdint.h>
#include <cpu/amd/vr.h>
-#include <device/device.h>
-#include "chip.h"
-#include "northbridge.h"
+#include <console/console.h>
+#include <cpu/amd/gx2def.h>
+#include <cpu/x86/msr.h>
+#include <stdlib.h>
+
+void geodegx2_vga_msr_init(void);
+void graphics_init(void);
+
+struct msrinit {
+ u32 msrnum;
+ msr_t msr;
+};
+
+static const struct msrinit geodegx2_vga_msr[] = {
+ /* Enable the GLIU Memory routing to the memory A0000-BFFFF
+ * PDID1 : Port 4, GLIU0
+ * PBASE : 0x000A0
+ * PMASK : 0xFFFE0
+ */
+ {.msrnum = GLIU0_P2D_BM_4, {.lo = 0x0a0fffe0, .hi = 0x80000000}},
+};
+
+void geodegx2_vga_msr_init(void)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(geodegx2_vga_msr); i++)
+ wrmsr(geodegx2_vga_msr[i].msrnum, geodegx2_vga_msr[i].msr);
+}
+
/* This function mirrors the Graphics_Init routine in GeodeROM. */
void graphics_init(void)
{
+ uint16_t wClassIndex, wData, res;
+
/* SoftVG initialization */
+ printk(BIOS_DEBUG, "Graphics init...\n");
+
+ geodegx2_vga_msr_init();
/* Call SoftVG with the main configuration parameters. */
- /* NOTE: SoftVG expects the memory size to be given in 512 KB pages */
- vrWrite((VRC_VG << 8) + VG_MEM_SIZE, 0x0100 | (CONFIG_VIDEO_MB * 2));
+ /* NOTE: SoftVG expects the memory size to be given in 512 KB blocks */
+
+ wClassIndex = (VRC_VG << 8) + VG_CONFIG;
+
+ /*
+ * Graphics Driver Enabled (13) 0, NO (lets BIOS controls the GP)
+ * External Monochrome Card Support(12) 0, NO
+ * Controller Priority Select(11) 1, Primary
+ * Display Select(10:8) 0x0, CRT
+ * Graphics Memory Size(7:1) CONFIG_VIDEO_MB >> 1,
+ * defined in devicetree.cb
+ * PLL Reference Clock Bypass(0) 0, Default
+ */
+
+ /* Video RAM has to be given in 512KB chunks
+ * the value is read @ 7:1 (value in 7:0 looks like /2)
+ * so we can add the real value in megabytes
+ */
+
+ wData = VG_CFG_PRIORITY | VG_CFG_DSCRT | ((CONFIG_VIDEO_MB * 2) & VG_MEM_MASK);
+ vrWrite(wClassIndex, wData);
+
+ res = vrRead(wClassIndex);
+ printk(BIOS_DEBUG, "VRC_VG value: 0x%04x\n", res);
}