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 #include "../drivers/pci/onboard/chip.h"
   8
   9 struct rom_header * pci_rom_probe(struct device *dev)
  10 {
  11         unsigned long rom_address;
  12         struct rom_header *rom_header;
  13         struct pci_data *rom_data;
  14
  15         if (dev->on_mainboard && (dev->rom_address != 0) ) {
  16                 rom_address = dev->rom_address;
  17         }
  18         else {
  19                 rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  20         }
  21
  22         rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  23         if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  24                 return NULL;
  25         }
  26
  27         printk_spew("%s, rom address for %s = %x\n",
  28                     __func__, dev_path(dev), rom_address);
  29
  30         /* enable expansion ROM address decoding */
  31         pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address|PCI_ROM_ADDRESS_ENABLE);
  32
  33         rom_header = rom_address;
  34         printk_spew("%s, PCI Expansion ROM, signature 0x%04x, \n\t"
  35                     "INIT size 0x%04x, data ptr 0x%04x\n",
  36                     __func__, le32_to_cpu(rom_header->signature),
  37                     rom_header->size * 512, le32_to_cpu(rom_header->data));
  38         if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
  39                 printk_err("%s, Incorrect Expansion ROM Header Signature %04x\n",
  40                            __func__, le32_to_cpu(rom_header->signature));
  41                 return NULL;
  42         }
  43
  44         rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  45         printk_spew("%s, PCI ROM Image,  Vendor %04x, Device %04x,\n",
  46                     __func__, rom_data->vendor, rom_data->device);
  47         if (dev->vendor != rom_data->vendor || dev->device != rom_data->device) {
  48                 printk_err("%s, Device or Vendor ID mismatch\n");
  49                 return NULL;
  50         }
  51
  52         printk_spew("%s, PCI ROM Image,  Class Code %02x%04x, Code Type %02x\n",
  53                     __func__, rom_data->class_hi, rom_data->class_lo,
  54                     rom_data->type);
  55         if ((dev->class >> 8) != (rom_data->class_hi << 16 | rom_data->class_lo)) {
  56                 printk_err("%s, Class Code mismatch %x\n",
  57                            __func__, dev->class);
  58                 return NULL;
  59         }
  60
  61         return rom_header;
  62 }
  63
  64 static void *pci_ram_image_start = PCI_RAM_IMAGE_START;
  65 struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header)
  66 {
  67         struct pci_data * rom_data;
  68         unsigned long rom_address;
  69         unsigned int rom_size;
  70
  71         rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  72         rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  73         rom_size = rom_header->size*512;
  74
  75         if (PCI_CLASS_DISPLAY_VGA == (rom_data->class_hi << 16 | rom_data->class_lo)) {
  76                 printk_spew("%s, copying VGA ROM Image from %x to %x, %x bytes\n",
  77                             __func__, rom_header, PCI_VGA_RAM_IMAGE_START, rom_size);
  78                 memcpy(PCI_VGA_RAM_IMAGE_START, rom_header, rom_size);
  79                 return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
  80         } else {
  81                 printk_spew("%s, copying non-VGA ROM Image from %x to %x, %x bytes\n",
  82                             __func__, rom_header, pci_ram_image_start, rom_size);
  83                 memcpy(pci_ram_image_start, rom_header, rom_size);
  84                 pci_ram_image_start += rom_size;
  85                 return (struct rom_header *) pci_ram_image_start;
  86         }
  87         /* disable expansion ROM address decoding */
  88         pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address & ~PCI_ROM_ADDRESS_ENABLE);
  89 }