src/devices/pci_rom.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2005 Li-Ta Lo <ollie@lanl.gov>
   5  * Copyright (C) 2005 Tyan
   6  * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
   7  * Copyright (C) 2005 Ronald G. Minnich <rminnich@gmail.com>
   8  * Copyright (C) 2005-2007 Stefan Reinauer <stepan@openbios.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; version 2 of the License.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  22  */
  23
  24 #include <console/console.h>
  25 #include <device/device.h>
  26 #include <device/pci.h>
  27 #include <device/pci_ids.h>
  28 #include <device/pci_ops.h>
  29 #include <string.h>
  30 #include <cbfs.h>
  31
  32 struct rom_header *pci_rom_probe(struct device *dev)
  33 {
  34         struct rom_header *rom_header;
  35         struct pci_data *rom_data;
  36
  37         /* If it's in FLASH, then don't check device for ROM. */
  38         rom_header = cbfs_load_optionrom(dev->vendor, dev->device, NULL);
  39
  40         if (rom_header) {
  41                 printk(BIOS_DEBUG, "In CBFS, ROM address for %s = %p\n",
  42                        dev_path(dev), rom_header);
  43         } else {
  44                 u32 rom_address;
  45
  46                 rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  47
  48                 if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  49 #if defined(CONFIG_BOARD_EMULATION_QEMU_X86) && CONFIG_BOARD_EMULATION_QEMU_X86
  50                         if ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
  51                                 rom_address = 0xc0000;
  52                         else
  53 #endif
  54                                 return NULL;
  55                 } else {
  56                         /* Enable expansion ROM address decoding. */
  57                         pci_write_config32(dev, PCI_ROM_ADDRESS,
  58                                            rom_address|PCI_ROM_ADDRESS_ENABLE);
  59                 }
  60
  61                 printk(BIOS_DEBUG, "On card, ROM address for %s = %lx\n",
  62                        dev_path(dev), (unsigned long)rom_address);
  63                 rom_header = (struct rom_header *)rom_address;
  64         }
  65
  66         printk(BIOS_SPEW, "PCI expansion ROM, signature 0x%04x, "
  67                "INIT size 0x%04x, data ptr 0x%04x\n",
  68                le32_to_cpu(rom_header->signature),
  69                rom_header->size * 512, le32_to_cpu(rom_header->data));
  70
  71         if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
  72                 printk(BIOS_ERR, "Incorrect expansion ROM header "
  73                        "signature %04x\n", le32_to_cpu(rom_header->signature));
  74                 return NULL;
  75         }
  76
  77         rom_data = (((void *)rom_header) + le32_to_cpu(rom_header->data));
  78
  79         printk(BIOS_SPEW, "PCI ROM image, vendor ID %04x, device ID %04x,\n",
  80                rom_data->vendor, rom_data->device);
  81         if (dev->vendor != rom_data->vendor
  82             || dev->device != rom_data->device) {
  83                 printk(BIOS_ERR, "ID mismatch: vendor ID %04x, "
  84                        "device ID %04x\n", rom_data->vendor, rom_data->device);
  85                 return NULL;
  86         }
  87
  88         printk(BIOS_SPEW, "PCI ROM image, Class Code %04x%02x, "
  89                "Code Type %02x\n", rom_data->class_hi, rom_data->class_lo,
  90                rom_data->type);
  91
  92         if (dev->class != ((rom_data->class_hi << 8) | rom_data->class_lo)) {
  93                 printk(BIOS_DEBUG, "Class Code mismatch ROM %08x, dev %08x\n",
  94                        (rom_data->class_hi << 8) | rom_data->class_lo,
  95                        dev->class);
  96                 // return NULL;
  97         }
  98
  99         return rom_header;
 100 }
 101
 102 static void *pci_ram_image_start = (void *)PCI_RAM_IMAGE_START;
 103
 104 struct rom_header *pci_rom_load(struct device *dev,
 105                                 struct rom_header *rom_header)
 106 {
 107         struct pci_data * rom_data;
 108         unsigned int rom_size;
 109         unsigned int image_size=0;
 110
 111         do {
 112                 /* Get next image. */
 113                 rom_header = (struct rom_header *)((void *) rom_header
 114                                                             + image_size);
 115
 116                 rom_data = (struct pci_data *)((void *) rom_header
 117                                 + le32_to_cpu(rom_header->data));
 118
 119                 image_size = le32_to_cpu(rom_data->ilen) * 512;
 120         } while ((rom_data->type != 0) && (rom_data->indicator != 0)); // make sure we got x86 version
 121
 122         if (rom_data->type != 0)
 123                 return NULL;
 124
 125         rom_size = rom_header->size * 512;
 126
 127         /*
 128          * We check to see if the device thinks it is a VGA device not
 129          * whether the ROM image is for a VGA device because some
 130          * devices have a mismatch between the hardware and the ROM.
 131          */
 132         if (PCI_CLASS_DISPLAY_VGA == (dev->class >> 8)) {
 133 #if CONFIG_MULTIPLE_VGA_ADAPTERS == 0
 134                 extern device_t vga_pri; /* Primary VGA device (device.c). */
 135                 if (dev != vga_pri) return NULL; /* Only one VGA supported. */
 136 #endif
 137                 if ((void *)PCI_VGA_RAM_IMAGE_START != rom_header) {
 138                         printk(BIOS_DEBUG, "Copying VGA ROM Image from %p to "
 139                                "0x%x, 0x%x bytes\n", rom_header,
 140                                PCI_VGA_RAM_IMAGE_START, rom_size);
 141                         memcpy((void *)PCI_VGA_RAM_IMAGE_START, rom_header,
 142                                rom_size);
 143                 }
 144                 return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
 145         }
 146
 147         printk(BIOS_DEBUG, "Copying non-VGA ROM image from %p to %p, 0x%x "
 148                "bytes\n", rom_header, pci_ram_image_start, rom_size);
 149
 150         memcpy(pci_ram_image_start, rom_header, rom_size);
 151         pci_ram_image_start += rom_size;
 152         return (struct rom_header *) (pci_ram_image_start-rom_size);
 153 }