mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 12:45:42 +00:00
222 lines
6.2 KiB
C
222 lines
6.2 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <pci.h>
|
|
#include <malloc.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/realmode.h>
|
|
#include <asm/io.h>
|
|
#include <asm/pci.h>
|
|
|
|
#undef PCI_BIOS_DEBUG
|
|
#undef VGA_BIOS_DEBUG
|
|
|
|
#ifdef VGA_BIOS_DEBUG
|
|
#define PRINTF(fmt,args...) printf (fmt ,##args)
|
|
#else
|
|
#define PRINTF(fmt,args...)
|
|
#endif
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
#ifdef PCI_BIOS_DEBUG
|
|
#define RELOC_16(seg, off) *(u32*)(seg << 4 | (u32)&off)
|
|
extern u32 num_pci_bios_present;
|
|
extern u32 num_pci_bios_find_device;
|
|
extern u32 num_pci_bios_find_class;
|
|
extern u32 num_pci_bios_generate_special_cycle;
|
|
extern u32 num_pci_bios_read_cfg_byte;
|
|
extern u32 num_pci_bios_read_cfg_word;
|
|
extern u32 num_pci_bios_read_cfg_dword;
|
|
extern u32 num_pci_bios_write_cfg_byte;
|
|
extern u32 num_pci_bios_write_cfg_word;
|
|
extern u32 num_pci_bios_write_cfg_dword;
|
|
extern u32 num_pci_bios_get_irq_routing;
|
|
extern u32 num_pci_bios_set_irq;
|
|
extern u32 num_pci_bios_unknown_function;
|
|
|
|
void print_bios_bios_stat(void)
|
|
{
|
|
printf("16 bit functions:\n");
|
|
printf("pci_bios_present: %d\n", RELOC_16(0xf000, num_pci_bios_present));
|
|
printf("pci_bios_find_device: %d\n", RELOC_16(0xf000, num_pci_bios_find_device));
|
|
printf("pci_bios_find_class: %d\n", RELOC_16(0xf000, num_pci_bios_find_class));
|
|
printf("pci_bios_generate_special_cycle: %d\n", RELOC_16(0xf000, num_pci_bios_generate_special_cycle));
|
|
printf("pci_bios_read_cfg_byte: %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_byte));
|
|
printf("pci_bios_read_cfg_word: %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_word));
|
|
printf("pci_bios_read_cfg_dword: %d\n", RELOC_16(0xf000, num_pci_bios_read_cfg_dword));
|
|
printf("pci_bios_write_cfg_byte: %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_byte));
|
|
printf("pci_bios_write_cfg_word: %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_word));
|
|
printf("pci_bios_write_cfg_dword: %d\n", RELOC_16(0xf000, num_pci_bios_write_cfg_dword));
|
|
printf("pci_bios_get_irq_routing: %d\n", RELOC_16(0xf000, num_pci_bios_get_irq_routing));
|
|
printf("pci_bios_set_irq: %d\n", RELOC_16(0xf000, num_pci_bios_set_irq));
|
|
printf("pci_bios_unknown_function: %d\n", RELOC_16(0xf000, num_pci_bios_unknown_function));
|
|
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_VIDEO
|
|
|
|
#define PCI_CLASS_VIDEO 3
|
|
#define PCI_CLASS_VIDEO_STD 0
|
|
#define PCI_CLASS_VIDEO_PROG_IF_VGA 0
|
|
|
|
static struct pci_device_id supported[] = {
|
|
{PCI_VIDEO_VENDOR_ID, PCI_VIDEO_DEVICE_ID},
|
|
{}
|
|
};
|
|
|
|
static u32 probe_pci_video(void)
|
|
{
|
|
pci_dev_t devbusfn;
|
|
|
|
if ((devbusfn = pci_find_devices(supported, 0) != -1)) {
|
|
u32 old;
|
|
u32 addr;
|
|
|
|
/* PCI video device detected */
|
|
printf("Found PCI VGA device at %02x.%02x.%x\n",
|
|
PCI_BUS(devbusfn), PCI_DEV(devbusfn), PCI_FUNC(devbusfn));
|
|
|
|
/* Enable I/O decoding as well, PCI viudeo boards
|
|
* support I/O accesses, but they provide no
|
|
* bar register for this since the ports are fixed.
|
|
*/
|
|
pci_write_config_word(devbusfn, PCI_COMMAND, PCI_COMMAND_MEMORY | PCI_COMMAND_IO | PCI_COMMAND_MASTER);
|
|
|
|
/* Test the ROM decoder, do the device support a rom? */
|
|
pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &old);
|
|
pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS, (u32)PCI_ROM_ADDRESS_MASK);
|
|
pci_read_config_dword(devbusfn, PCI_ROM_ADDRESS, &addr);
|
|
pci_write_config_dword(devbusfn, PCI_ROM_ADDRESS, old);
|
|
|
|
if (!addr) {
|
|
printf("PCI VGA have no ROM?\n");
|
|
return 0;
|
|
}
|
|
|
|
/* device have a rom */
|
|
if (pci_shadow_rom(devbusfn, (void*)0xc0000)) {
|
|
printf("Shadowing of PCI VGA BIOS failed\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Now enable lagacy VGA port access */
|
|
if (pci_enable_legacy_video_ports(pci_bus_to_hose(PCI_BUS(devbusfn)))) {
|
|
printf("PCI VGA enable failed\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* return the pci device info, that we'll need later */
|
|
return PCI_BUS(devbusfn) << 8 |
|
|
PCI_DEV(devbusfn) << 3 | (PCI_FUNC(devbusfn)&7);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int probe_isa_video(void)
|
|
{
|
|
u32 ptr;
|
|
char *buf;
|
|
|
|
if (0 == (ptr = isa_map_rom(0xc0000, 0x8000))) {
|
|
return -1;
|
|
}
|
|
if (NULL == (buf=malloc(0x8000))) {
|
|
isa_unmap_rom(ptr);
|
|
return -1;
|
|
}
|
|
if (readw(ptr) != 0xaa55) {
|
|
free(buf);
|
|
isa_unmap_rom(ptr);
|
|
return -1;
|
|
}
|
|
|
|
/* shadow the rom */
|
|
memcpy(buf, (void*)ptr, 0x8000);
|
|
isa_unmap_rom(ptr);
|
|
memcpy((void*)0xc0000, buf, 0x8000);
|
|
|
|
free(buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int video_bios_init(void)
|
|
{
|
|
struct pt_regs regs;
|
|
|
|
/* clear the video bios area in case we warmbooted */
|
|
memset((void*)0xc0000, 0, 0x8000);
|
|
memset(®s, 0, sizeof(struct pt_regs));
|
|
|
|
if (probe_isa_video()) {
|
|
/* No ISA board found, try the PCI bus */
|
|
regs.eax = probe_pci_video();
|
|
}
|
|
|
|
/* Did we succeed in mapping any video bios */
|
|
if (readw(0xc0000) == 0xaa55) {
|
|
int size;
|
|
int i;
|
|
u8 sum;
|
|
|
|
PRINTF("Found video bios signature\n");
|
|
size = 512*readb(0xc0002);
|
|
PRINTF("size %d\n", size);
|
|
sum=0;
|
|
for (i=0;i<size;i++) {
|
|
sum += readb(0xc0000 + i);
|
|
}
|
|
PRINTF("Checksum is %sOK\n",sum?"NOT ":"");
|
|
if (sum) {
|
|
return 1;
|
|
}
|
|
|
|
/* some video bioses (ATI Mach64) seem to think that
|
|
* the original int 10 handler is always at
|
|
* 0xf000:0xf065 , place an iret instruction there
|
|
*/
|
|
writeb(0xcf, 0xff065);
|
|
|
|
regs.esp = 0x8000;
|
|
regs.xss = 0x2000;
|
|
enter_realmode(0xc000, 3, ®s, ®s);
|
|
PRINTF("INT 0x10 vector after: %04x:%04x\n",
|
|
readw(0x42), readw(0x40));
|
|
PRINTF("BIOS returned %scarry\n", regs.eflags & 1?"":"NOT ");
|
|
#ifdef PCI_BIOS_DEBUG
|
|
print_bios_bios_stat();
|
|
#endif
|
|
return (regs.eflags & 1);
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
|
#endif
|
|
#endif
|