This patch implements MBI (modular bios interface) support to the i830 chipset.

This is needed on the IP1000T to get VGA output. The VGA option rom will ask
through an SMI for hardware specifics (in form of a VBT, video bios table)
which the SMI handler copies into the VGA option rom. 

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5177 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 57 insertions, 3 deletions

diff --git a/src/northbridge/intel/i82830/vga.c b/src/northbridge/intel/i82830/vga.c
index e9cfdac0c6..8c1cac0a84 100644
--- a/src/northbridge/intel/i82830/vga.c
+++ b/src/northbridge/intel/i82830/vga.c
@@ -24,13 +24,67 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
+#include <cbfs.h>
+#include <x86emu/x86emu.h>
 
-static void vga_init(device_t dev) {
-
+static void vga_init(device_t dev)
+{
 	printk_info("Starting Graphics Initialization\n");
+	struct cbfs_file *file = cbfs_find("mbi.bin");
+	void *mbi = NULL;
+	unsigned int mbi_len = 0;
+
+	if (file) {
+		if (ntohl(file->type) != CBFS_TYPE_MBI) {
+			printk_info( "CBFS:  MBI binary is of type %x instead of"
+			       "type %x\n", file->type, CBFS_TYPE_MBI);
+		} else {
+			mbi = (void *) CBFS_SUBHEADER(file);
+			mbi_len = file->len;
+		}
+	} else {
+		printk_info( "Could not find MBI.\n");
+	}
+
+	if (mbi && mbi_len) {
+		/* The GDT or coreboot table is going to live here. But
+		 * a long time after we relocated the GNVS, so this is
+		 * not troublesome.
+		 */
+		*(u32 *)0x500 = (u32)mbi;
+		*(u32 *)0x504 = (u32)mbi_len;
+		outb(0xeb, 0xb2);
+	}
+
 	pci_dev_init(dev);
 	printk_info("Graphics Initialization Complete\n");
-	/* Future TV-OUT code will be called from here. */
+
+	/* Enable TV-Out */
+#if defined(CONFIG_PCI_OPTION_ROM_RUN_YABEL) && CONFIG_PCI_OPTION_ROM_RUN_YABEL
+#define PIPE_A_CRT	(1 << 0)
+#define PIPE_A_LFP	(1 << 1)
+#define PIPE_A_TV	(1 << 3)
+#define PIPE_B_CRT	(1 << 8)
+#define PIPE_B_TV	(1 << 10)
+	printk_debug("Enabling TV-Out\n"); 
+	void runInt10(void);
+	M.x86.R_AX = 0x5f64;
+	M.x86.R_BX = 0x0001; // Set Display Device, force execution
+	M.x86.R_CX = PIPE_A_CRT | PIPE_A_TV;
+	// M.x86.R_CX = PIPE_B_TV;
+	runInt10();
+	switch (M.x86.R_AX) {
+	case 0x005f:
+		printk_debug("... failed.\n");
+		break;
+	case 0x015f:
+		printk_debug("... ok.\n");
+		break;
+	default:
+		printk_debug("... not supported.\n");
+		break;
+	}
+#endif
 }
 
 static const struct device_operations vga_operations = {