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
  15         if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  16                 if (dev->on_mainboard && (dev->rom_address!=0) ) {
  17                         // in case some device PCI_ROM_ADDRESS can not be set
  18                         rom_address = dev->rom_address;
  19                 } else {
  20                         return NULL;
  21                 }
  22         }
  23
  24         printk_debug("rom address for %s = %x\n", dev_path(dev), rom_address);
  25
  26         /* enable expansion ROM address decoding */
  27         pci_write_config32(dev, PCI_ROM_ADDRESS,
  28                            rom_address|PCI_ROM_ADDRESS_ENABLE);
  29
  30         rom_header = rom_address;
  31         printk_spew("PCI Expansion ROM, signature 0x%04x, \n\t"
  32                     "INIT size 0x%04x, data ptr 0x%04x\n",
  33                     le32_to_cpu(rom_header->signature),
  34                     rom_header->size * 512, le32_to_cpu(rom_header->data));
  35         if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
  36                 printk_err("Incorrect Expansion ROM Header Signature %04x\n",
  37                            le32_to_cpu(rom_header->signature));
  38                 return NULL;
  39         }
  40
  41         rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  42         printk_spew("PCI ROM Image, Vendor %04x, Device %04x,\n",
  43                     rom_data->vendor, rom_data->device);
  44         if (dev->vendor != rom_data->vendor || dev->device != rom_data->device) {
  45                 printk_err("Device or Vendor ID mismatch Vendor %04x, Device %04x\n",
  46                            rom_data->vendor, rom_data->device);
  47                 return NULL;
  48         }
  49
  50         printk_spew("PCI ROM Image,  Class Code %04x%02x, Code Type %02x\n",
  51                     rom_data->class_hi, rom_data->class_lo,
  52                     rom_data->type);
  53         if (dev->class != ((rom_data->class_hi << 8) | rom_data->class_lo)) {
  54                 printk_err("Class Code mismatch ROM %08x, dev %08x\n",
  55                             (rom_data->class_hi << 8) | rom_data->class_lo, dev->class);
  56 //              return NULL;
  57         }
  58
  59         return rom_header;
  60 }
  61
  62 static void *pci_ram_image_start = PCI_RAM_IMAGE_START;
  63
  64 #if CONFIG_CONSOLE_VGA == 1
  65 int vga_inited = 0; // it will be used by vga_console
  66 extern device_t vga_pri; // The only VGA
  67 #endif
  68
  69 struct rom_header *pci_rom_load(struct device *dev, struct rom_header *rom_header)
  70 {
  71         struct pci_data * rom_data;
  72         unsigned long rom_address;
  73         unsigned int rom_size;
  74
  75         rom_address = pci_read_config32(dev, PCI_ROM_ADDRESS);
  76         rom_data = (unsigned char *) rom_header + le32_to_cpu(rom_header->data);
  77         rom_size = rom_header->size*512;
  78
  79         if (PCI_CLASS_DISPLAY_VGA == rom_data->class_hi) {
  80 #if CONFIG_CONSOLE_VGA == 1
  81                 if (dev != vga_pri) return NULL; // only one VGA supported
  82                 printk_spew("%s, copying VGA ROM Image from %x to %x, %x bytes\n",
  83                             __func__, rom_header, PCI_VGA_RAM_IMAGE_START, rom_size);
  84                 memcpy(PCI_VGA_RAM_IMAGE_START, rom_header, rom_size);
  85                 vga_inited = 1;
  86                 return (struct rom_header *) (PCI_VGA_RAM_IMAGE_START);
  87 #endif
  88         } else {
  89                 printk_spew("%s, copying non-VGA ROM Image from %x to %x, %x bytes\n",
  90                             __func__, rom_header, pci_ram_image_start, rom_size);
  91                 memcpy(pci_ram_image_start, rom_header, rom_size);
  92                 pci_ram_image_start += rom_size;
  93                 return (struct rom_header *) pci_ram_image_start;
  94         }
  95         /* disable expansion ROM address decoding */
  96         pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address & ~PCI_ROM_ADDRESS_ENABLE);
  97
  98         return NULL;
  99 }