diff options
Diffstat (limited to 'src/northbridge/via/cn400/vga.c')
| -rw-r--r-- | src/northbridge/via/cn400/vga.c | 68 |
1 files changed, 54 insertions, 14 deletions
diff --git a/src/northbridge/via/cn400/vga.c b/src/northbridge/via/cn400/vga.c index c71431c7c4..01227f6f9a 100644 --- a/src/northbridge/via/cn400/vga.c +++ b/src/northbridge/via/cn400/vga.c @@ -33,24 +33,63 @@ #include <string.h> #include <bitops.h> #include <cpu/cpu.h> +#include <arch/interrupt.h> #include "chip.h" #include "northbridge.h" #include "cn400.h" -#include "vgachip.h" -void write_protect_vgabios(void) +static int via_cn400_int15_handler(struct eregs *regs) { - /* Don't bother for now. */ + int res=-1; + printk(BIOS_DEBUG, "via_cn400_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; } static void vga_init(device_t dev) { u8 reg8; u32 temp; -#ifdef DEBUG_CN400 - int i, j; -#endif + mainboard_interrupt_handlers(0x15, &via_cn400_int15_handler); + +#undef OLD_BOCHS_METHOD +#ifdef OLD_BOCHS_METHOD + // XXX We might need more bios hooks in the f segment, but + // this way of copying the BOCHS BIOS does not work anymore. + // As soon as someone verifies that CN400 can init VGA, the + // code should be removed. temp = (0xffffffff - CONFIG_FALLBACK_SIZE - 0xffff); printk(BIOS_DEBUG, "Copying BOCHS BIOS from 0x%08X to 0xf000\n", temp); /* @@ -59,7 +98,7 @@ static void vga_init(device_t dev) */ //memcpy(0xf0000, (0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000); memcpy((void *)0xf0000, (void *)temp, 0x10000); - printk(BIOS_DEBUG, "Initializing VGA\n"); +#endif /* Set memory rate to 200 MHz. */ outb(0x3d, CRTM_INDEX); @@ -79,16 +118,13 @@ static void vga_init(device_t dev) pci_write_config32(dev, 0x10, 0xf0000008); pci_write_config32(dev, 0x14, 0xf4000000); - printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n"); - setup_realmode_idt(); - printk(BIOS_DEBUG, "DO THE VGA BIOS\n"); - do_vgabios(); - /* VGA seems to work without this, but crash & burn with it. */ - // printk(BIOS_DEBUG, "Enable VGA console\n"); - // vga_enable_console(); + 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); @@ -102,10 +138,14 @@ static void vga_init(device_t dev) 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 #ifdef DEBUG_CN400 + int i, j; + printk(BIOS_SPEW, "%s PCI Header Regs::\n", dev_path(dev)); for (i = 0 ; i < 16; i++) |