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# ifndef QEMU_I2C_H # define QEMU_I2C_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 ,
ths
authored
18 years ago
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I2C_NACK /* Masker NACKed a receive byte. */
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}; /* Master to slave. */ typedef int ( * i2c_send_cb )( i2c_slave * s , uint8_t data ); /* Slave to master. */ typedef int ( * i2c_recv_cb )( i2c_slave * s ); /* Notify the slave of a bus state change. */ typedef void ( * i2c_event_cb )( i2c_slave * s , enum i2c_event event ); struct i2c_slave { /* Callbacks to be set by the device. */
i2c_event_cb event ;
i2c_recv_cb recv ;
i2c_send_cb send ;
/* Remaining fields for internal use by the I2C code. */
int address ;
void * next ;
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i2c_bus * bus ;
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}; i2c_bus * i2c_init_bus ( void ); i2c_slave * i2c_slave_init ( i2c_bus * bus , int address , int size ); void i2c_set_slave_address ( i2c_slave * dev , int address ); int i2c_bus_busy ( i2c_bus * bus ); int i2c_start_transfer ( i2c_bus * bus , int address , int recv ); void i2c_end_transfer ( i2c_bus * bus ); void i2c_nack ( i2c_bus * bus ); int i2c_send ( i2c_bus * bus , uint8_t data ); int i2c_recv ( i2c_bus * bus );
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void i2c_slave_save ( QEMUFile * f , i2c_slave * dev ); void i2c_slave_load ( QEMUFile * f , i2c_slave * dev );
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/* max111x.c */ struct max111x_s ; uint32_t max111x_read ( void * opaque ); void max111x_write ( void * opaque , uint32_t value ); struct max111x_s * max1110_init ( qemu_irq cb ); struct max111x_s * max1111_init ( qemu_irq cb ); void max111x_set_input ( struct max111x_s * s , int line , uint8_t value );
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/* max7310.c */ i2c_slave * max7310_init ( i2c_bus * bus ); void max7310_reset ( i2c_slave * i2c ); qemu_irq * max7310_gpio_in_get ( i2c_slave * i2c ); void max7310_gpio_out_set ( i2c_slave * i2c , int line , qemu_irq handler ); /* wm8750.c */ i2c_slave * wm8750_init ( i2c_bus * bus , AudioState * audio ); void wm8750_reset ( i2c_slave * i2c ); void wm8750_data_req_set ( i2c_slave * i2c , void ( * data_req )( void * , int , int ), void * opaque );
void wm8750_dac_dat ( void * opaque , uint32_t sample ); uint32_t wm8750_adc_dat ( void * opaque );
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void * wm8750_dac_buffer ( void * opaque , int samples ); void wm8750_dac_commit ( void * opaque );
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void wm8750_set_bclk_in ( void * opaque , int new_hz );
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/* ssd0303.c */
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void ssd0303_init ( i2c_bus * bus , int address );
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/* twl92230.c */ i2c_slave * twl92230_init ( i2c_bus * bus , qemu_irq irq ); qemu_irq * twl92230_gpio_in_get ( i2c_slave * i2c ); void twl92230_gpio_out_set ( i2c_slave * i2c , int line , qemu_irq handler ); /* tmp105.c */ struct i2c_slave * tmp105_init ( i2c_bus * bus , qemu_irq alarm ); void tmp105_reset ( i2c_slave * i2c ); void tmp105_set ( i2c_slave * i2c , int temp );
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/* lm832x.c */ struct i2c_slave * lm8323_init ( i2c_bus * bus , qemu_irq nirq ); void lm832x_key_event ( struct i2c_slave * i2c , int key , int state );
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# endif