include/hw/i2c/pm_smbus.h

   1 #ifndef PM_SMBUS_H
   2 #define PM_SMBUS_H
   3
   4 #include "hw/i2c/smbus_master.h"
   5
   6 #define PM_SMBUS_MAX_MSG_SIZE 32
   7
   8 typedef struct PMSMBus {
   9     I2CBus *smbus;
  10     MemoryRegion io;
  11
  12     uint8_t smb_stat;
  13     uint8_t smb_ctl;
  14     uint8_t smb_cmd;
  15     uint8_t smb_addr;
  16     uint8_t smb_data0;
  17     uint8_t smb_data1;
  18     uint8_t smb_data[PM_SMBUS_MAX_MSG_SIZE];
  19     uint8_t smb_blkdata;
  20     uint8_t smb_auxctl;
  21     uint32_t smb_index;
  22
  23     /* Set by pm_smbus.c */
  24     void (*reset)(struct PMSMBus *s);
  25
  26     /* Set by the user. */
  27     bool i2c_enable;
  28     void (*set_irq)(struct PMSMBus *s, bool enabled);
  29     void *opaque;
  30
  31     /* Internally used by pm_smbus. */
  32
  33     /* Set on block transfers after the last byte has been read, so the
  34        INTR bit can be set at the right time. */
  35     bool op_done;
  36
  37     /* Set during an I2C block read, so we know how to handle data. */
  38     bool in_i2c_block_read;
  39
  40     /* Used to work around a bug in AMIBIOS, see smb_transaction_start() */
  41     bool start_transaction_on_status_read;
  42 } PMSMBus;
  43
  44 void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk);
  45
  46 /*
  47  * For backwards compatibility on migration, older versions don't have
  48  * working migration for pm_smbus, this lets us ignore the migrations
  49  * for older machine versions.
  50  */
  51 bool pm_smbus_vmstate_needed(void);
  52
  53 extern const VMStateDescription pmsmb_vmstate;
  54
  55 #endif /* PM_SMBUS_H */