Add support for the Via CN700 with a C7 CPU and DDR2 RAM. Only a single DIMM is

working for now, and more work is needed for it to be fully dynamic. However,
just about any 128MB-512MB DIMM should work.

Signed-off-by: Corey Osgood <corey.osgood@gmail.com>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3113 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 125 insertions, 0 deletions

diff --git a/src/northbridge/via/cn700/vga.c b/src/northbridge/via/cn700/vga.c
new file mode 100644
index 0000000000..15756841fd
--- /dev/null
+++ b/src/northbridge/via/cn700/vga.c
@@ -0,0 +1,125 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+/* Note: Some of the VGA control registers are located on the memory controller.
+   Registers are set both in raminit.c and northbridge.c */
+
+#include <console/console.h>
+#include <arch/io.h>
+#include <stdint.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <stdlib.h>
+#include <string.h>
+#include <bitops.h>
+#include <cpu/cpu.h>
+#include "chip.h"
+#include "northbridge.h"
+#include "cn700.h"
+
+void write_protect_vgabios(void)
+{
+//Don't bother for now
+}
+
+static void vga_init(device_t dev)
+{
+	u8 reg8;
+
+	print_debug("Copying BOCHS Bios to 0xf000\n");
+/* Copy the BOCHs BIOS from 0xFFFFFFFF - ROM_SIZE - BOCHs size (64k) to 0xf0000
+   This is for compatibility with the VGA ROM's BIOS callbacks */
+	memcpy(0xf0000, (0xFFFFFFFF - ROM_SIZE - 0x10000), 0x10000);
+
+	printk_debug("Initializing VGA\n");
+	
+	pci_write_config8(dev, 0x3c, 0xb);
+
+	/* Set memory rate to 200MHz */
+	outb(0x3d, CRTM_INDEX);
+	reg8 = inb(CRTM_DATA);
+	reg8 &= 0x0f;
+	reg8 |= (0x1 << 4);
+	outb(0x3d, CRTM_INDEX);
+	outb(reg8, CRTM_DATA);
+	
+	/* Set framebuffer size */
+	reg8 = (CONFIG_VIDEO_MB / 4);
+	outb(0x39, SR_INDEX);
+	outb(reg8, SR_DATA);
+	
+	
+	pci_write_config8(dev, 0x04, 0x07);
+	pci_write_config8(dev, 0x0d, 0x20);
+	pci_write_config32(dev,0x10, 0xf4000008);
+	pci_write_config32(dev,0x14, 0xfb000000);
+	pci_write_config8(dev, 0x3e, 0x02);
+	pci_write_config8(dev, 0x3c, 0x0a);
+	
+	
+	printk_debug("INSTALL REAL-MODE IDT\n");
+	setup_realmode_idt();
+	printk_debug("DO THE VGA BIOS\n");
+	do_vgabios();
+	/* VGA seems to work without this, but crash & burn with it */
+	//printk_debug("Enable VGA console\n");
+	//vga_enable_console();
+
+	/* It's not clear if these need to be programmed before or after
+	 * the VGA bios runs. Try both, clean up later */
+	/* Set memory rate to 200MHz */
+	outb(0x3d, CRTM_INDEX);
+	reg8 = inb(CRTM_DATA);
+	reg8 &= 0x0f;
+	reg8 |= (0x1 << 4);
+	outb(0x3d, CRTM_INDEX);
+	outb(reg8, CRTM_DATA);
+	
+	/* Set framebuffer size (again) */
+	reg8 = (CONFIG_VIDEO_MB / 4);
+	outb(0x39, SR_INDEX);
+	outb(reg8, SR_DATA);
+
+	/* Clear the BOCHs Bios out of memory, so it doesn't confuse linux */
+	memset(0xf0000, 0, 0x10000);
+}
+
+static void vga_read_resources(device_t dev)
+{
+	dev->rom_address = 0xfff80000;
+	dev->on_mainboard=1;
+	pci_dev_read_resources(dev);
+}
+
+
+static const struct device_operations vga_operations = {
+	.read_resources   = vga_read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = pci_dev_enable_resources,
+	.init             = vga_init,
+	.ops_pci          = 0,
+};
+
+static const struct pci_driver vga_driver __pci_driver = {
+	.ops = &vga_operations,
+	.vendor = PCI_VENDOR_ID_VIA,
+	.device = PCI_DEVICE_ID_VIA_CN700_VGA,
+};