| #ifndef QEMU_I2C_H |
| #define QEMU_I2C_H |
| |
| #include "hw/qdev.h" |
| |
| /* The QEMU I2C implementation only supports simple transfers that complete |
| immediately. It does not support slave devices that need to be able to |
| defer their response (eg. CPU slave interfaces where the data is supplied |
| by the device driver in response to an interrupt). */ |
| |
| enum i2c_event { |
| I2C_START_RECV, |
| I2C_START_SEND, |
| I2C_FINISH, |
| I2C_NACK /* Masker NACKed a receive byte. */ |
| }; |
| |
| typedef struct I2CSlave I2CSlave; |
| |
| #define TYPE_I2C_SLAVE "i2c-slave" |
| #define I2C_SLAVE(obj) \ |
| OBJECT_CHECK(I2CSlave, (obj), TYPE_I2C_SLAVE) |
| #define I2C_SLAVE_CLASS(klass) \ |
| OBJECT_CLASS_CHECK(I2CSlaveClass, (klass), TYPE_I2C_SLAVE) |
| #define I2C_SLAVE_GET_CLASS(obj) \ |
| OBJECT_GET_CLASS(I2CSlaveClass, (obj), TYPE_I2C_SLAVE) |
| |
| typedef struct I2CSlaveClass |
| { |
| DeviceClass parent_class; |
| |
| /* Callbacks provided by the device. */ |
| int (*init)(I2CSlave *dev); |
| |
| /* Master to slave. */ |
| int (*send)(I2CSlave *s, uint8_t data); |
| |
| /* Slave to master. */ |
| int (*recv)(I2CSlave *s); |
| |
| /* Notify the slave of a bus state change. */ |
| void (*event)(I2CSlave *s, enum i2c_event event); |
| } I2CSlaveClass; |
| |
| struct I2CSlave |
| { |
| DeviceState qdev; |
| |
| /* Remaining fields for internal use by the I2C code. */ |
| uint8_t address; |
| }; |
| |
| I2CBus *i2c_init_bus(DeviceState *parent, const char *name); |
| void i2c_set_slave_address(I2CSlave *dev, uint8_t address); |
| int i2c_bus_busy(I2CBus *bus); |
| int i2c_start_transfer(I2CBus *bus, uint8_t address, int recv); |
| void i2c_end_transfer(I2CBus *bus); |
| void i2c_nack(I2CBus *bus); |
| int i2c_send(I2CBus *bus, uint8_t data); |
| int i2c_recv(I2CBus *bus); |
| |
| DeviceState *i2c_create_slave(I2CBus *bus, const char *name, uint8_t addr); |
| |
| /* wm8750.c */ |
| void wm8750_data_req_set(DeviceState *dev, |
| void (*data_req)(void *, int, int), void *opaque); |
| void wm8750_dac_dat(void *opaque, uint32_t sample); |
| uint32_t wm8750_adc_dat(void *opaque); |
| void *wm8750_dac_buffer(void *opaque, int samples); |
| void wm8750_dac_commit(void *opaque); |
| void wm8750_set_bclk_in(void *opaque, int new_hz); |
| |
| /* lm832x.c */ |
| void lm832x_key_event(DeviceState *dev, int key, int state); |
| |
| extern const VMStateDescription vmstate_i2c_slave; |
| |
| #define VMSTATE_I2C_SLAVE(_field, _state) { \ |
| .name = (stringify(_field)), \ |
| .size = sizeof(I2CSlave), \ |
| .vmsd = &vmstate_i2c_slave, \ |
| .flags = VMS_STRUCT, \ |
| .offset = vmstate_offset_value(_state, _field, I2CSlave), \ |
| } |
| |
| #endif |