| /* |
| * 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. |
| */ |
| |
| /* |
| * 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 <cpu/cpu.h> |
| #include <arch/interrupt.h> |
| #include "northbridge.h" |
| #include "cn700.h" |
| #include <x86emu/regs.h> |
| |
| static int via_cn700_int15_handler(void) |
| { |
| int res=0; |
| printk(BIOS_DEBUG, "via_cn700_int15_handler\n"); |
| switch(X86_EAX & 0xffff) { |
| case 0x5f19: |
| break; |
| case 0x5f18: |
| X86_EAX=0x5f; |
| X86_EBX=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory |
| X86_ECX=0x060; |
| res=1; |
| break; |
| case 0x5f00: |
| X86_EAX = 0x8600; |
| break; |
| case 0x5f01: |
| X86_EAX = 0x5f; |
| X86_ECX = (X86_ECX & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 |
| res = 1; |
| break; |
| case 0x5f02: |
| X86_EAX=0x5f; |
| X86_EBX= (X86_EBX & 0xffff0000) | 2; |
| X86_ECX= (X86_ECX & 0xffff0000) | 0x401; // PAL + crt only |
| X86_EDX= (X86_EDX & 0xffff0000) | 0; // TV Layout - default |
| res=1; |
| break; |
| case 0x5f0f: |
| X86_EAX=0x860f; |
| break; |
| default: |
| printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", |
| X86_EAX & 0xffff); |
| break; |
| } |
| return res; |
| } |
| |
| static void vga_init(device_t dev) |
| { |
| u8 reg8; |
| |
| mainboard_interrupt_handlers(0x15, &via_cn700_int15_handler); |
| |
| #undef OLD_BOCHS_METHOD |
| #ifdef OLD_BOCHS_METHOD |
| printk(BIOS_DEBUG, "Copying BOCHS BIOS to 0xf000\n"); |
| /* |
| * Copy BOCHS BIOS from 4G-CONFIG_ROM_SIZE-64k (in flash) to 0xf0000 (in RAM) |
| * This is for compatibility with the VGA ROM's BIOS callbacks. |
| */ |
| memcpy((void *)0xf0000, (const void *)(0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000); |
| #endif |
| |
| /* Set memory rate to 200 MHz. */ |
| 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); |
| |
| printk(BIOS_DEBUG, "Initializing VGA...\n"); |
| |
| pci_dev_init(dev); |
| |
| /* 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 200 MHz (again). */ |
| 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); |
| |
| #ifdef OLD_BOCHS_METHOD |
| /* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */ |
| memset((void *)0xf0000, 0, 0x10000); |
| #endif |
| } |
| |
| static const 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 = PCI_DEVICE_ID_VIA_CN700_VGA, |
| }; |