blob: 17ddb8f658b7439c015865b7b6938d849268fd63 [file] [log] [blame]
/*
* This file is part of the LinuxBIOS project.
*
* Copyright (C) 2005 Li-Ta Lo <ollie@lanl.gov>
* Copyright (C) 2005 Tyan
* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
* Copyright (C) 2005 Ronald G. Minnich <rminnich@gmail.com>
* Copyright (C) 2005-2007 Stefan Reinauer <stepan@openbios.org>
*
* 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 <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
struct rom_header * pci_rom_probe(struct device *dev)
{
unsigned long rom_address;
struct rom_header *rom_header;
struct pci_data *rom_data;
if (dev->on_mainboard) {
// in case some device PCI_ROM_ADDRESS can not be set or readonly
rom_address = dev->rom_address;
} else {
rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
}
if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
return NULL;
}
printk_debug("rom address for %s = %x\n", dev_path(dev), rom_address);
if(!dev->on_mainboard) {
/* enable expansion ROM address decoding */
pci_write_config32(dev, PCI_ROM_ADDRESS,
rom_address|PCI_ROM_ADDRESS_ENABLE);
}
rom_header = (struct rom_header *)rom_address;
printk_spew("PCI Expansion ROM, signature 0x%04x, INIT size 0x%04x, data ptr 0x%04x\n",
le32_to_cpu(rom_header->signature),
rom_header->size * 512, le32_to_cpu(rom_header->data));
if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
printk_err("Incorrect Expansion ROM Header Signature %04x\n",
le32_to_cpu(rom_header->signature));
return NULL;
}
rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
printk_spew("PCI ROM Image, Vendor %04x, Device %04x,\n",
rom_data->vendor, rom_data->device);
if (dev->vendor != rom_data->vendor || dev->device != rom_data->device) {
printk_err("Device or Vendor ID mismatch Vendor %04x, Device %04x\n",
rom_data->vendor, rom_data->device);
return NULL;
}
printk_spew("PCI ROM Image, Class Code %04x%02x, Code Type %02x\n",
rom_data->class_hi, rom_data->class_lo,
rom_data->type);
if (dev->class != ((rom_data->class_hi << 8) | rom_data->class_lo)) {
printk_debug("Class Code mismatch ROM %08x, dev %08x\n",
(rom_data->class_hi << 8) | rom_data->class_lo, dev->class);
//return NULL;
}
return rom_header;
}
static void *pci_ram_image_start = (void *)PCI_RAM_IMAGE_START;
struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header)
{
struct pci_data * rom_data;
unsigned long rom_address;
unsigned int rom_size;
unsigned int image_size=0;
rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
do {
rom_header = (unsigned char *) rom_header + image_size; // get next image
rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
image_size = le32_to_cpu(rom_data->ilen) * 512;
} while ((rom_data->type!=0) && (rom_data->indicator!=0)); // make sure we got x86 version
if(rom_data->type!=0) return NULL;
rom_size = rom_header->size * 512;
if (PCI_CLASS_DISPLAY_VGA == rom_data->class_hi) {
#if CONFIG_CONSOLE_VGA == 1 && CONFIG_CONSOLE_VGA_MULTI == 0
extern device_t vga_pri; // the primary vga device, defined in device.c
if (dev != vga_pri) return NULL; // only one VGA supported
#endif
printk_debug("copying VGA ROM Image from 0x%x to 0x%x, 0x%x bytes\n",
rom_header, PCI_VGA_RAM_IMAGE_START, rom_size);
memcpy(PCI_VGA_RAM_IMAGE_START, rom_header, rom_size);
return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
} else {
printk_debug("copying non-VGA ROM Image from 0x%x to 0x%x, 0x%x bytes\n",
rom_header, pci_ram_image_start, rom_size);
memcpy(pci_ram_image_start, rom_header, rom_size);
pci_ram_image_start += rom_size;
return (struct rom_header *) (pci_ram_image_start-rom_size);
}
/* disable expansion ROM address decoding */
pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address & ~PCI_ROM_ADDRESS_ENABLE);
return NULL;
}