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         {
  14                 if(ops_smbus_bus(get_pbus_smbus(dev))) {
  15                         smbus_send_byte(dev, link); // output value
  16                 }
  17
  18         }
  19
  20 }
  21 static void i2cmux2_noop(device_t dummy)
  22 {
  23 }
  24
  25 static struct device_operations i2cmux2_operations = {
  26         .read_resources   = i2cmux2_noop,
  27         .set_resources    = i2cmux2_noop,
  28         .enable_resources = i2cmux2_noop,
  29         .init             = i2cmux2_noop,
  30         .scan_bus         = scan_static_bus,
  31         .set_link         = i2cmux2_set_link,
  32 };
  33
  34 static void enable_dev(struct device *dev)
  35 {
  36         if(dev->links>0)
  37                 dev->ops = &i2cmux2_operations;
  38 }
  39
  40 struct chip_operations drivers_i2c_i2cmux2_ops = {
  41         CHIP_NAME("i2cmux2")
  42         .enable_dev = enable_dev,
  43 };