include/hw/i2c/pm_smbus.h

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