src/devices/pci_rom.c

   1 #include <console/console.h>
   2 #include <device/device.h>
   3 #include <device/pci.h>
   4 #include <device/pci_ids.h>
   5 #include <device/pci_ops.h>
   6
   7 struct rom_header * pci_rom_probe(struct device *dev)
   8 {
   9         unsigned long rom_address;
  10         struct rom_header *rom_header;
  11         struct pci_data *rom_data;
  12
  13         rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  14         if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  15                 /* FixME: search in the LinuxBIOS Image for integrated
  16                  * devices? */
  17                 return NULL;
  18         }
  19
  20         printk_spew("%s, rom address for %s = %x\n",
  21                     __func__, dev_path(dev), rom_address);
  22
  23         /* enable expansion ROM address decoding */
  24         pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address|PCI_ROM_ADDRESS_ENABLE);
  25
  26         rom_header = rom_address;
  27         printk_spew("%s, PCI Expansion ROM, signature 0x%04x, \n\t"
  28                     "INIT size 0x%04x, data ptr 0x%04x\n",
  29                     __func__, le32_to_cpu(rom_header->signature),
  30                     rom_header->size * 512, le32_to_cpu(rom_header->data));
  31         if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
  32                 printk_err("%s, Incorrect Expansion ROM Header Signature %04x\n",
  33                            __func__, le32_to_cpu(rom_header->signature));
  34                 return NULL;
  35         }
  36
  37         rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  38         printk_spew("%s, PCI ROM Image,  Vendor %04x, Device %04x,\n",
  39                     __func__, rom_data->vendor, rom_data->device);
  40         if (dev->vendor != rom_data->vendor || dev->device != rom_data->device) {
  41                 printk_err("%s, Device or Vendor ID mismatch\n");
  42                 return NULL;
  43         }
  44
  45         printk_spew("%s, PCI ROM Image,  Class Code %02x%04x, Code Type %02x\n",
  46                     __func__, rom_data->class_hi, rom_data->class_lo,
  47                     rom_data->type);
  48         if ((dev->class >> 8) != (rom_data->class_hi << 16 | rom_data->class_lo)) {
  49                 printk_err("%s, Class Code mismatch %x\n",
  50                            __func__, dev->class);
  51                 return NULL;
  52         }
  53
  54         return rom_header;
  55 }
  56
  57 static void *pci_ram_image_start = PCI_RAM_IMAGE_START;
  58 struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header)
  59 {
  60         struct pci_data * rom_data;
  61         unsigned long rom_address;
  62         unsigned int rom_size;
  63
  64         rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  65         rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  66         rom_size = rom_header->size*512;
  67
  68         if (PCI_CLASS_DISPLAY_VGA == (rom_data->class_hi << 16 | rom_data->class_lo)) {
  69                 printk_spew("%s, copying VGA ROM Image from %x to %x, %x bytes\n",
  70                             __func__, rom_header, PCI_VGA_RAM_IMAGE_START, rom_size);
  71                 memcpy(PCI_VGA_RAM_IMAGE_START, rom_header, rom_size);
  72                 return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
  73         } else {
  74                 printk_spew("%s, copying non-VGA ROM Image from %x to %x, %x bytes\n",
  75                             __func__, rom_header, pci_ram_image_start, rom_size);
  76                 memcpy(pci_ram_image_start, rom_header, rom_size);
  77                 pci_ram_image_start += rom_size;
  78                 return (struct rom_header *) pci_ram_image_start;
  79         }
  80         /* disable expansion ROM address decoding */
  81         pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address & ~PCI_ROM_ADDRESS_ENABLE);
  82 }