diff options
Diffstat (limited to 'src/northbridge/via/vt8623/vga.c')
| -rw-r--r-- | src/northbridge/via/vt8623/vga.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/src/northbridge/via/vt8623/vga.c b/src/northbridge/via/vt8623/vga.c new file mode 100644 index 0000000000..7dbb7831b1 --- /dev/null +++ b/src/northbridge/via/vt8623/vga.c @@ -0,0 +1,158 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007-2009 coresystems GmbH + * + * 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 + */ + +#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 <arch/interrupt.h> +#include "chip.h" +#include "northbridge.h" + +static int via_vt8623_int15_handler(struct eregs *regs) +{ + int res=-1; + printk(BIOS_DEBUG, "via_vt8623_int15_handler\n"); + switch(regs->eax & 0xffff) { + case 0x5f19: + break; + case 0x5f18: + regs->eax=0x5f; + regs->ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory + regs->ecx=0x060; + res=0; + break; + case 0x5f00: + regs->eax = 0x8600; + break; + case 0x5f01: + regs->eax = 0x5f; + regs->ecx = (regs->ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 + res = 0; + break; + case 0x5f02: + regs->eax=0x5f; + regs->ebx= (regs->ebx & 0xffff0000) | 2; + regs->ecx= (regs->ecx & 0xffff0000) | 0x401; // PAL + crt only + regs->edx= (regs->edx & 0xffff0000) | 0; // TV Layout - default + res=0; + break; + case 0x5f0f: + regs->eax=0x860f; + break; + default: + printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", + regs->eax & 0xffff); + break; + } + return res; +} + +void write_protect_vgabios(void) +{ + device_t dev; + + printk(BIOS_DEBUG, "write_protect_vgabios\n"); + + dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3122, 0); + if (dev) + pci_write_config8(dev, 0x61, 0xaa); + + dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3123, 0); + if (dev) + pci_write_config8(dev, 0x61, 0xaa); +} + +static void vga_random_fixup(device_t dev) +{ + printk(BIOS_DEBUG, "VGA random fixup ...\n"); + pci_write_config8(dev, 0x04, 0x07); + pci_write_config8(dev, 0x0d, 0x20); + pci_write_config32(dev,0x10,0xd8000008); + pci_write_config32(dev,0x14,0xdc000000); +} + +static void vga_init(device_t dev) +{ + vga_random_fixup(dev); + + mainboard_interrupt_handlers(0x15, &via_vt8623_int15_handler); + +#ifdef MEASURE_VGA_INIT_TIME + msr_t clocks1, clocks2, instructions, setup; + + // set up performnce counters for debugging vga init sequence + setup.lo = 0x1c0; // count instructions + wrmsr(0x187,setup); + instructions.hi = 0; + instructions.lo = 0; + wrmsr(0xc2,instructions); + clocks1 = rdmsr(0x10); +#endif + printk(BIOS_DEBUG, "Initializing VGA...\n"); + + pci_dev_init(dev); + + printk(BIOS_DEBUG, "Enable VGA console\n"); + // this is how it should look: + // call_bios_interrupt(0x10,0x4f1f,0x8003,1,0); + // this is how it looks: + vga_enable_console(); + +#ifdef MEASURE_VGA_INIT_TIME + clocks2 = rdmsr(0x10); + instructions = rdmsr(0xc2); + + printk(BIOS_DEBUG, "Clocks 1 = %08x:%08x\n",clocks1.hi,clocks1.lo); + printk(BIOS_DEBUG, "Clocks 2 = %08x:%08x\n",clocks2.hi,clocks2.lo); + printk(BIOS_DEBUG, "Instructions = %08x:%08x\n",instructions.hi,instructions.lo); +#endif + + pci_write_config32(dev, 0x30, 0); + +#if 0 + /* Set the vga mtrrs - disable for the moment as the add_var_mtrr function has vapourised */ + unsigned long fb; + add_var_mtrr( 0xd0000000 >> 10, 0x08000000>>10, MTRR_TYPE_WRCOMB); + fb = pci_read_config32(dev,0x10); // get the fb address + add_var_mtrr( fb>>10, 8192, MTRR_TYPE_WRCOMB); +#endif +} + +static struct device_operations vga_operations = { + .read_resources = pci_dev_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 = 0x3122, +}; |