src/southbridge/amd/amd8111/amd8111_early_smbus.c

   1 #include "amd8111_smbus.h"
   2
   3 #define SMBUS_IO_BASE 0x0f00
   4
   5 static void enable_smbus(void)
   6 {
   7         device_t dev;
   8         dev = pci_locate_device(PCI_ID(0x1022, 0x746b), 0);
   9         if (dev == PCI_DEV_INVALID) {
  10                 die("SMBUS controller not found\r\n");
  11         }
  12         uint8_t enable;
  13         print_spew("SMBus controller enabled\r\n");
  14         pci_write_config32(dev, 0x58, SMBUS_IO_BASE | 1);
  15         enable = pci_read_config8(dev, 0x41);
  16         pci_write_config8(dev, 0x41, enable | (1 << 7));
  17         /* clear any lingering errors, so the transaction will run */
  18         outw(inw(SMBUS_IO_BASE + SMBGSTATUS), SMBUS_IO_BASE + SMBGSTATUS);
  19 }
  20
  21 static int smbus_recv_byte(unsigned device)
  22 {
  23         return do_smbus_recv_byte(SMBUS_IO_BASE, device);
  24 }
  25
  26 static int smbus_send_byte(unsigned device, unsigned char val)
  27 {
  28         return do_smbus_send_byte(SMBUS_IO_BASE, device, val);
  29 }
  30
  31 static int smbus_read_byte(unsigned device, unsigned address)
  32 {
  33         return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
  34 }
  35
  36 static int smbus_write_byte(unsigned device, unsigned address, unsigned char val)
  37 {
  38         return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val);
  39 }