src/southbridge/amd/amd8131/amd8131_bridge.c

   1 /*
   2  * (C) 2003 Linux Networx
   3  */
   4 #include <console/console.h>
   5 #include <device/device.h>
   6 #include <device/pci.h>
   7 #include <device/pci_ids.h>
   8 #include <device/pci_ops.h>
   9
  10 static void pcix_init(device_t dev)
  11 {
  12         uint16_t word;
  13         uint8_t byte;
  14
  15         /* Enable memory write and invalidate ??? */
  16         byte = pci_read_config8(dev, 0x04);
  17         byte |= 0x10;
  18         pci_write_config8(dev, 0x04, byte);
  19
  20         /* Set drive strength */
  21         word = pci_read_config16(dev, 0xe0);
  22         word = 0x0404;
  23         pci_write_config16(dev, 0xe0, word);
  24         word = pci_read_config16(dev, 0xe4);
  25         word = 0x0404;
  26         pci_write_config16(dev, 0xe4, word);
  27
  28         /* Set impedance */
  29         word = pci_read_config16(dev, 0xe8);
  30         word = 0x0404;
  31         pci_write_config16(dev, 0xe8, word);
  32
  33         return;
  34 }
  35
  36 static struct device_operations pcix_ops  = {
  37         .read_resources = pci_bus_read_resources,
  38         .set_resources = pci_dev_set_resources,
  39         .init = pcix_init,
  40         .scan_bus = pci_scan_bridge,
  41 };
  42
  43 static struct pci_driver pcix_driver __pci_driver = {
  44         .ops    = &pcix_ops,
  45         .vendor = PCI_VENDOR_ID_AMD,
  46         .device = 0x7450,
  47 };
  48
  49
  50 static void ioapic_enable(device_t dev)
  51 {
  52         uint32_t value;
  53         value = pci_read_config32(dev, 0x44);
  54         if (dev->enable) {
  55                 value |= ((1 << 1) | (1 << 0));
  56         } else {
  57                 value &= ~((1 << 1) | (1 << 0));
  58         }
  59         pci_write_config32(dev, 0x44, value);
  60
  61 //BY LYH
  62         value = pci_read_config32(dev, 0x4);
  63         value |= 6;
  64         pci_write_config32(dev, 0x4, value);
  65 //BY LYH END
  66
  67
  68 }
  69
  70 static struct device_operations ioapic_ops = {
  71         .read_resources = pci_dev_read_resources,
  72         .set_resources  = pci_dev_set_resources,
  73         .init     = 0,
  74         .scan_bus = 0,
  75         .enable   = ioapic_enable,
  76 };
  77
  78 static struct pci_driver ioapic_driver __pci_driver = {
  79         .ops    = &ioapic_ops,
  80         .vendor = PCI_VENDOR_ID_AMD,
  81         .device = 0x7451,
  82
  83 };