diff options
| author | Corey Minyard <cminyard@mvista.com> | 2017-12-07 09:34:59 -0600 |
|---|---|---|
| committer | Corey Minyard <cminyard@mvista.com> | 2019-02-27 21:06:08 -0600 |
| commit | 547db24a17c22c47f762aae3a0a6f518f574e7f2 (patch) | |
| tree | 1cdf9b4b87147f11db9858afc7c4f128f449cd36 /include/hw/i2c | |
| parent | 4ab2f2a8aabfea95cc53c64e13b3f67960b27fdf (diff) | |
i2c:smbus_slave: Add an SMBus vmstate structure
There is no vmstate handling for SMBus, so no device sitting on SMBus
can have a state transfer that works reliably. So add it.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'include/hw/i2c')
| -rw-r--r-- | include/hw/i2c/smbus_slave.h | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/include/hw/i2c/smbus_slave.h b/include/hw/i2c/smbus_slave.h index 79050fb92d..ebe068304e 100644 --- a/include/hw/i2c/smbus_slave.h +++ b/include/hw/i2c/smbus_slave.h @@ -69,14 +69,32 @@ typedef struct SMBusDeviceClass uint8_t (*receive_byte)(SMBusDevice *dev); } SMBusDeviceClass; +#define SMBUS_DATA_MAX_LEN 34 /* command + len + 32 bytes of data. */ + struct SMBusDevice { /* The SMBus protocol is implemented on top of I2C. */ I2CSlave i2c; /* Remaining fields for internal use only. */ - int mode; - int data_len; - uint8_t data_buf[34]; /* command + len + 32 bytes of data. */ + int32_t mode; + int32_t data_len; + uint8_t data_buf[SMBUS_DATA_MAX_LEN]; }; +extern const VMStateDescription vmstate_smbus_device; + +#define VMSTATE_SMBUS_DEVICE(_field, _state) { \ + .name = (stringify(_field)), \ + .size = sizeof(SMBusDevice), \ + .vmsd = &vmstate_smbus_device, \ + .flags = VMS_STRUCT, \ + .offset = vmstate_offset_value(_state, _field, SMBusDevice), \ +} + +/* + * Users should call this in their .needed functions to know if the + * SMBus slave data needs to be transferred. + */ +bool smbus_vmstate_needed(SMBusDevice *dev); + #endif |