src/northbridge/intel/e7520/pciexp_porta.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 #include <device/pciexp.h>
   7 #include <arch/io.h>
   8 #include "chip.h"
   9 #include <reset.h>
  10
  11 typedef struct northbridge_intel_e7520_config config_t;
  12
  13 static void pcie_init(struct device *dev)
  14 {
  15         config_t *config;
  16
  17         /* Get the chip configuration */
  18         config = dev->chip_info;
  19
  20         if(config->intrline) {
  21                 pci_write_config32(dev, 0x3c, config->intrline);
  22         }
  23
  24 }
  25
  26 static unsigned int pcie_scan_bridge(struct device *dev, unsigned int max)
  27 {
  28         uint16_t val;
  29         uint16_t ctl;
  30         int flag = 0;
  31         do {
  32                 val = pci_read_config16(dev, 0x76);
  33                 printk(BIOS_DEBUG, "pcie porta 0x76: %02x\n", val);
  34                 if((val & (1<<10) )&&(!flag)) { /* training error */
  35                         ctl = pci_read_config16(dev, 0x74);
  36                         pci_write_config16(dev, 0x74, (ctl | (1<<5)));
  37                         val = pci_read_config16(dev, 0x76);
  38                         printk(BIOS_DEBUG, "pcie porta reset 0x76: %02x\n", val);
  39                         flag=1;
  40                         hard_reset();
  41                 }
  42         } while ( val & (3<<10) );
  43         return pciexp_scan_bridge(dev, max);
  44 }
  45
  46 static struct device_operations pcie_ops  = {
  47         .read_resources   = pci_bus_read_resources,
  48         .set_resources    = pci_dev_set_resources,
  49         .enable_resources = pci_bus_enable_resources,
  50         .init             = pcie_init,
  51         .scan_bus         = pcie_scan_bridge,
  52         .reset_bus        = pci_bus_reset,
  53         .ops_pci          = 0,
  54 };
  55
  56 static const struct pci_driver pci_driver __pci_driver = {
  57         .ops    = &pcie_ops,
  58         .vendor = PCI_VENDOR_ID_INTEL,
  59         .device = PCI_DEVICE_ID_INTEL_PCIE_PA,
  60 };
  61
  62