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         if (dev->on_mainboard) {
  14                 // in case some device PCI_ROM_ADDRESS can not be set or readonly
  15                 rom_address = dev->rom_address;
  16         } else {
  17                 rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  18         }
  19
  20         if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  21                 return NULL;
  22         }
  23
  24         printk_debug("rom address for %s = %x\n", dev_path(dev), rom_address);
  25
  26         if(!dev->on_mainboard) {
  27                 /* enable expansion ROM address decoding */
  28                 pci_write_config32(dev, PCI_ROM_ADDRESS,
  29                                    rom_address|PCI_ROM_ADDRESS_ENABLE);
  30         }
  31
  32         rom_header = (struct rom_header *)rom_address;
  33         printk_spew("PCI Expansion ROM, signature 0x%04x, INIT size 0x%04x, data ptr 0x%04x\n",
  34                     le32_to_cpu(rom_header->signature),
  35                     rom_header->size * 512, le32_to_cpu(rom_header->data));
  36         if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
  37                 printk_err("Incorrect Expansion ROM Header Signature %04x\n",
  38                            le32_to_cpu(rom_header->signature));
  39                 return NULL;
  40         }
  41
  42         rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  43         printk_spew("PCI ROM Image, Vendor %04x, Device %04x,\n",
  44                     rom_data->vendor, rom_data->device);
  45         if (dev->vendor != rom_data->vendor || dev->device != rom_data->device) {
  46                 printk_err("Device or Vendor ID mismatch Vendor %04x, Device %04x\n",
  47                            rom_data->vendor, rom_data->device);
  48                 return NULL;
  49         }
  50
  51         printk_spew("PCI ROM Image,  Class Code %04x%02x, Code Type %02x\n",
  52                     rom_data->class_hi, rom_data->class_lo,
  53                     rom_data->type);
  54         if (dev->class != ((rom_data->class_hi << 8) | rom_data->class_lo)) {
  55                 printk_debug("Class Code mismatch ROM %08x, dev %08x\n",
  56                             (rom_data->class_hi << 8) | rom_data->class_lo, dev->class);
  57                 //return NULL;
  58         }
  59
  60         return rom_header;
  61 }
  62
  63 static void *pci_ram_image_start = (void *)PCI_RAM_IMAGE_START;
  64
  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         unsigned int image_size=0;
  71
  72         rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  73
  74         do {
  75                 rom_header = (unsigned char *) rom_header + image_size; // get next image
  76                 rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  77                 image_size = le32_to_cpu(rom_data->ilen) * 512;
  78         } while ((rom_data->type!=0) && (rom_data->indicator!=0));  // make sure we got x86 version
  79
  80         if(rom_data->type!=0) return NULL;
  81
  82         rom_size = rom_header->size * 512;
  83
  84         if (PCI_CLASS_DISPLAY_VGA == rom_data->class_hi) {
  85 #if CONFIG_CONSOLE_VGA == 1 && CONFIG_CONSOLE_VGA_MULTI == 0
  86                 extern device_t vga_pri;        // the primary vga device, defined in device.c
  87                 if (dev != vga_pri) return NULL; // only one VGA supported
  88 #endif
  89                 printk_debug("copying VGA ROM Image from 0x%x to 0x%x, 0x%x bytes\n",
  90                             rom_header, PCI_VGA_RAM_IMAGE_START, rom_size);
  91                 memcpy(PCI_VGA_RAM_IMAGE_START, rom_header, rom_size);
  92                 return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
  93         } else {
  94                 printk_debug("copying non-VGA ROM Image from 0x%x to 0x%x, 0x%x bytes\n",
  95                             rom_header, pci_ram_image_start, rom_size);
  96                 memcpy(pci_ram_image_start, rom_header, rom_size);
  97                 pci_ram_image_start += rom_size;
  98                 return (struct rom_header *) (pci_ram_image_start-rom_size);
  99         }
 100         /* disable expansion ROM address decoding */
 101         pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address & ~PCI_ROM_ADDRESS_ENABLE);
 102
 103         return NULL;
 104 }