src/southbridge/intel/i82801ex/smbus.c

   1 #include <device/device.h>
   2 #include <device/path.h>
   3 #include <device/pci.h>
   4 #include <device/pci_ids.h>
   5 #include <device/pci_ops.h>
   6 #include <device/smbus.h>
   7 #include <arch/io.h>
   8 #include "i82801ex.h"
   9 #include "smbus.h"
  10
  11 static int lsmbus_read_byte(device_t dev, u8 address)
  12 {
  13         u16 device;
  14         struct resource *res;
  15         struct bus *pbus;
  16
  17         device = dev->path.i2c.device;
  18         pbus = get_pbus_smbus(dev);
  19         res = find_resource(pbus->dev, 0x20);
  20
  21         return do_smbus_read_byte(res->base, device, address);
  22 }
  23
  24 static struct smbus_bus_operations lops_smbus_bus = {
  25         .read_byte  = lsmbus_read_byte,
  26 };
  27
  28 static struct pci_operations lops_pci = {
  29         /* The subsystem id follows the ide controller */
  30         .set_subsystem = 0,
  31 };
  32
  33 static struct device_operations smbus_ops = {
  34         .read_resources   = pci_dev_read_resources,
  35         .set_resources    = pci_dev_set_resources,
  36         .enable_resources = pci_dev_enable_resources,
  37         .init             = 0,
  38         .scan_bus         = scan_static_bus,
  39         .enable           = i82801ex_enable,
  40         .ops_pci          = &lops_pci,
  41         .ops_smbus_bus    = &lops_smbus_bus,
  42 };
  43
  44 static const struct pci_driver smbus_driver __pci_driver = {
  45         .ops    = &smbus_ops,
  46         .vendor = PCI_VENDOR_ID_INTEL,
  47         .device = PCI_DEVICE_ID_INTEL_82801ER_SMB,
  48 };
  49