Git Repo - qemu.git/blame_incremental

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Commit	Line	Data
	1	#ifndef QEMU_I2C_H
	2	#define QEMU_I2C_H
	3
	4	#include "qdev.h"
	5
	6	/* The QEMU I2C implementation only supports simple transfers that complete
	7	immediately. It does not support slave devices that need to be able to
	8	defer their response (eg. CPU slave interfaces where the data is supplied
	9	by the device driver in response to an interrupt). */
	10
	11	enum i2c_event {
	12	I2C_START_RECV,
	13	I2C_START_SEND,
	14	I2C_FINISH,
	15	I2C_NACK /* Masker NACKed a receive byte. */
	16	};
	17
	18	/* Master to slave. */
	19	typedef int (i2c_send_cb)(i2c_slave s, uint8_t data);
	20	/* Slave to master. */
	21	typedef int (i2c_recv_cb)(i2c_slave s);
	22	/* Notify the slave of a bus state change. */
	23	typedef void (i2c_event_cb)(i2c_slave s, enum i2c_event event);
	24
	25	typedef int (i2c_slave_initfn)(i2c_slave dev);
	26
	27	typedef struct {
	28	DeviceInfo qdev;
	29
	30	/* Callbacks provided by the device. */
	31	i2c_slave_initfn init;
	32	i2c_event_cb event;
	33	i2c_recv_cb recv;
	34	i2c_send_cb send;
	35	} I2CSlaveInfo;
	36
	37	struct i2c_slave
	38	{
	39	DeviceState qdev;
	40	I2CSlaveInfo *info;
	41
	42	/* Remaining fields for internal use by the I2C code. */
	43	uint8_t address;
	44	};
	45
	46	i2c_bus i2c_init_bus(DeviceState parent, const char *name);
	47	void i2c_set_slave_address(i2c_slave *dev, uint8_t address);
	48	int i2c_bus_busy(i2c_bus *bus);
	49	int i2c_start_transfer(i2c_bus *bus, uint8_t address, int recv);
	50	void i2c_end_transfer(i2c_bus *bus);
	51	void i2c_nack(i2c_bus *bus);
	52	int i2c_send(i2c_bus *bus, uint8_t data);
	53	int i2c_recv(i2c_bus *bus);
	54
	55	#define I2C_SLAVE_FROM_QDEV(dev) DO_UPCAST(i2c_slave, qdev, dev)
	56	#define FROM_I2C_SLAVE(type, dev) DO_UPCAST(type, i2c, dev)
	57
	58	void i2c_register_slave(I2CSlaveInfo *type);
	59
	60	DeviceState i2c_create_slave(i2c_bus bus, const char *name, uint8_t addr);
	61
	62	/* max7310.c */
	63	void max7310_reset(i2c_slave *i2c);
	64	qemu_irq max7310_gpio_in_get(i2c_slave i2c);
	65	void max7310_gpio_out_set(i2c_slave *i2c, int line, qemu_irq handler);
	66
	67	/* wm8750.c */
	68	void wm8750_data_req_set(DeviceState *dev,
	69	void (data_req)(void , int, int), void *opaque);
	70	void wm8750_dac_dat(void *opaque, uint32_t sample);
	71	uint32_t wm8750_adc_dat(void *opaque);
	72	void wm8750_dac_buffer(void opaque, int samples);
	73	void wm8750_dac_commit(void *opaque);
	74	void wm8750_set_bclk_in(void *opaque, int new_hz);
	75
	76	/* tmp105.c */
	77	void tmp105_set(i2c_slave *i2c, int temp);
	78
	79	/* lm832x.c */
	80	void lm832x_key_event(i2c_slave *i2c, int key, int state);
	81
	82	#endif