Here's the VIA vx800 patch from OLPC.

It's untested, but a good starting point for everyone.

Signed-off-by: Bari Ari <bari@onelabs.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4313 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 148 insertions, 0 deletions

diff --git a/src/northbridge/via/vx800/vga.c b/src/northbridge/via/vx800/vga.c
new file mode 100644
index 000000000000..03680786e593
--- /dev/null
+++ b/src/northbridge/via/vx800/vga.c
@@ -0,0 +1,148 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2009 One Laptop per Child, Association, Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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 <cpu/x86/mtrr.h>
+#include <cpu/x86/msr.h>
+#include "chip.h"
+#include "northbridge.h"
+#include "vgachip.h"
+
+/* PCI Domain 1 Device 0 Function 0 */
+
+#define SR_INDEX	0x3c4
+#define SR_DATA		0x3c5
+#define CRTM_INDEX	0x3b4
+#define CRTM_DATA	0x3b5
+#define CRTC_INDEX	0x3d4
+#define CRTC_DATA	0x3d5
+
+void write_protect_vgabios(void)
+{
+	device_t dev;
+
+	printk_info("write_protect_vgabios\n");
+	/* there are two possible devices. Just do both. */
+	dev =
+	    dev_find_device(PCI_VENDOR_ID_VIA,
+			    PCI_DEVICE_ID_VIA_VX855_MEMCTRL, 0);
+	if (dev)
+		pci_write_config8(dev, 0x80, 0xff);
+	/*vx855 no th 0x61 reg */
+	/*dev = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX855_NB_VLINK, 0);
+	   //if(dev)
+	   //   pci_write_config8(dev, 0x61, 0xff); */
+}
+
+extern u8 acpi_sleep_type;
+static void vga_init(device_t dev)
+{
+	uint8_t reg8;
+
+	print_debug("Initiailizing VGA...\n");
+	u8 tmp8;
+//A20 OPEN
+	tmp8 = inb(0x92);
+	tmp8 = tmp8 | 2;
+	outb(tmp8, 0x92);
+
+	//*
+	//pci_write_config8(dev, 0x04, 0x07);
+	//pci_write_config32(dev,0x10, 0xa0000008);
+	//pci_write_config32(dev,0x14, 0xdd000000);
+	pci_write_config32(dev, 0x10, VIACONFIG_VGA_PCI_10);
+	pci_write_config32(dev, 0x14, VIACONFIG_VGA_PCI_14);
+	pci_write_config8(dev, 0x3c, 0x0a);	//same with vx855_lpc.c
+	//*/
+	printk_emerg("file '%s', line %d\n\n", __FILE__, __LINE__);
+
+
+#if 1
+	printk_debug("INSTALL REAL-MODE IDT\n");
+	setup_realmode_idt();
+	printk_debug("DO THE VGA BIOS\n");
+
+	do_vgabios();
+	if ((acpi_sleep_type == 3) || (PAYLOAD_IS_SEABIOS == 0)) {
+		printk_debug("Enable VGA console\n");
+		// remove this function since in cn700 it is said "VGA seems to work without this, but crash & burn with it"
+		//but the existense of  vga_enable_console()  seems do not hurt my coreboot. XP+ubuntu s3 can resume with and without this function.
+		//and remove it also do not help my s3 problem: desktop screen have some thin black line, after resuming back to win.
+		vga_enable_console();
+	}
+#else
+/* Attempt to manually force the rom to load */
+	printk_debug("Forcing rom load\r\n");
+	pci_rom_load(dev, 0xfff80000);
+	run_bios(dev, 0xc0000);
+#endif
+	if ((acpi_sleep_type == 3) || (PAYLOAD_IS_SEABIOS == 0)) {
+		/* 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 |= (0x3 << 4);
+		outb(0x3d, CRTM_INDEX);
+		outb(reg8, CRTM_DATA);
+
+		/* Set framebuffer size to CONFIG_VIDEO_MB mb */
+		/*reg8 = (CONFIG_VIDEO_MB/4);
+		   outb(0x39, SR_INDEX);
+		   outb(reg8, SR_DATA); */
+	}
+	printk_emerg("file '%s', line %d\n\n", __FILE__, __LINE__);
+
+}
+
+static void vga_read_resources(device_t dev)
+{
+	dev->rom_address = (void *) (0xffffffff - FULL_ROM_SIZE + 1);
+	dev->on_mainboard = 1;
+	pci_dev_read_resources(dev);
+}
+
+
+static 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_VX855_VGA,
+};