src/drivers/i2c/i2cmux2/i2cmux2.c

   1 #include <console/console.h>
   2 #include <device/device.h>
   3 #include <device/smbus.h>
   4 #include <device/pci.h>
   5 #include <device/pci_ids.h>
   6 #include <device/pci_ops.h>
   7 #include <cpu/x86/msr.h>
   8 #include "chip.h"
   9
  10 static void i2cmux2_set_link(device_t dev, unsigned int link)
  11 {
  12         if (dev->enabled && dev->path.type == DEVICE_PATH_I2C) {
  13                 if (ops_smbus_bus(get_pbus_smbus(dev))) {
  14                         smbus_send_byte(dev, link);     // output value
  15                 }
  16         }
  17 }
  18
  19 static void i2cmux2_noop(device_t dummy)
  20 {
  21 }
  22
  23 static struct device_operations i2cmux2_operations = {
  24         .read_resources = i2cmux2_noop,
  25         .set_resources = i2cmux2_noop,
  26         .enable_resources = i2cmux2_noop,
  27         .init = i2cmux2_noop,
  28         .scan_bus = scan_static_bus,
  29         .set_link = i2cmux2_set_link,
  30 };
  31
  32 static void enable_dev(struct device *dev)
  33 {
  34         if (dev->link_list != NULL)
  35                 dev->ops = &i2cmux2_operations;
  36 }
  37
  38 struct chip_operations drivers_i2c_i2cmux2_ops = {
  39         CHIP_NAME("i2cmux2")
  40         .enable_dev = enable_dev,
  41 };