src/drivers/i2c/adm1027/adm1027.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 <part/hard_reset.h>
   8 #include <cpu/x86/msr.h>
   9 #include "chip.h"
  10
  11 #define ADM1027_REG_CONFIG1     0x40
  12 #define CFG1_STRT               0x01
  13 #define CFG1_LOCK               0x02
  14 #define CFG1_RDY                0x04
  15 #define CFG1_FSPD               0x08
  16 #define CFG1_VXI                0x10
  17 #define CFT1_FSPDIS             0x20
  18 #define CFG1_TODIS              0x40
  19 #define CFG1_VCC                0x80
  20 #define ADM1027_REG_CONFIG2     0x73
  21 #define ADM1027_REG_CONFIG3     0x78
  22
  23 static void adm1027_enable_monitoring(device_t dev)
  24 {
  25         int result;
  26
  27         result = smbus_read_byte(dev, ADM1027_REG_CONFIG1);
  28
  29         if (!(result & CFG1_RDY)) {
  30                 printk_debug("ADM1027: monitoring not ready\r\n");
  31                 return;
  32         }
  33         result = (result | CFG1_STRT);
  34         result = smbus_write_byte(dev, ADM1027_REG_CONFIG1, result);
  35
  36         result = smbus_read_byte(dev, ADM1027_REG_CONFIG1);
  37         if (!(result & CFG1_STRT)) {
  38                 printk_debug("ADM1027: monitoring would not enable\r\n");
  39         }
  40         printk_debug("ADM1027: monitoring enabled\r\n");
  41 }
  42
  43 static void adm1027_init(device_t dev)
  44 {
  45         if (dev->enabled && dev->path.type == DEVICE_PATH_I2C) {
  46                 if (ops_smbus_bus(get_pbus_smbus(dev))) {
  47                         if (dev->bus->dev->path.type == DEVICE_PATH_I2C)
  48                                 smbus_set_link(dev);    // it is under mux
  49                         adm1027_enable_monitoring(dev);
  50                 }
  51
  52         }
  53 }
  54
  55 static void adm1027_noop(device_t dummy)
  56 {
  57 }
  58
  59 static struct device_operations adm1027_operations = {
  60         .read_resources         = adm1027_noop,
  61         .set_resources          = adm1027_noop,
  62         .enable_resources       = adm1027_noop,
  63         .init                   = adm1027_init,
  64 };
  65
  66 static void enable_dev(struct device *dev)
  67 {
  68         dev->ops = &adm1027_operations;
  69 }
  70
  71 struct chip_operations drivers_i2c_adm1027_ops = {
  72         CHIP_NAME("adm1027")
  73         .enable_dev = enable_dev,
  74 };