From 547db24a17c22c47f762aae3a0a6f518f574e7f2 Mon Sep 17 00:00:00 2001 From: Corey Minyard Date: Thu, 7 Dec 2017 09:34:59 -0600 Subject: 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 Cc: Paolo Bonzini Cc: Michael S. Tsirkin Cc: Dr. David Alan Gilbert Reviewed-by: Dr. David Alan Gilbert --- include/hw/i2c/smbus_slave.h | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/hw/i2c/smbus_slave.h b/include/hw/i2c/smbus_slave.h index 79050fb..ebe0683 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 -- cgit v1.1