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