usb/au0828/au0828-i2c.c

26 static inline int i2c_slave_did_read_ack(struct i2c_adapter *i2c_adap)
28 	struct au0828_dev *dev = i2c_adap->algo_data;
33 static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap)
38 		if (!i2c_slave_did_read_ack(i2c_adap))
49 static inline int i2c_is_read_busy(struct i2c_adapter *i2c_adap)
51 	struct au0828_dev *dev = i2c_adap->algo_data;
56 static int i2c_wait_read_done(struct i2c_adapter *i2c_adap)
61 		if (!i2c_is_read_busy(i2c_adap))
72 static inline int i2c_is_write_done(struct i2c_adapter *i2c_adap)
74 	struct au0828_dev *dev = i2c_adap->algo_data;
79 static int i2c_wait_write_done(struct i2c_adapter *i2c_adap)
84 		if (i2c_is_write_done(i2c_adap))
95 static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
97 	struct au0828_dev *dev = i2c_adap->algo_data;
102 static int i2c_wait_done(struct i2c_adapter *i2c_adap)
107 		if (!i2c_is_busy(i2c_adap))
119 static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
123 	struct au0828_dev *dev = i2c_adap->algo_data;
162 		if (!i2c_wait_done(i2c_adap))
165 		if (i2c_wait_read_ack(i2c_adap))
194 			if (!i2c_wait_write_done(i2c_adap))
200 	if (!i2c_wait_done(i2c_adap))
209 static int i2c_readbytes(struct i2c_adapter *i2c_adap,
212 	struct au0828_dev *dev = i2c_adap->algo_data;
242 		if (i2c_wait_read_ack(i2c_adap))
259 		if (!i2c_wait_read_done(i2c_adap))
267 	if (!i2c_wait_done(i2c_adap))
275 static int i2c_xfer(struct i2c_adapter *i2c_adap,
287 			retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
291 			retval = i2c_sendbytes(i2c_adap, &msgs[i],
296 			retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
299 			retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
358 	dev->i2c_adap = au0828_i2c_adap_template;
362 	dev->i2c_adap.dev.parent = &dev->usbdev->dev;
364 	strscpy(dev->i2c_adap.name, KBUILD_MODNAME,
365 		sizeof(dev->i2c_adap.name));
367 	dev->i2c_adap.algo = &dev->i2c_algo;
368 	dev->i2c_adap.algo_data = dev;
370 	i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
372 	i2c_set_adapdata(&dev->i2c_adap, dev);
374 	i2c_add_adapter(&dev->i2c_adap);
376 	dev->i2c_client.adapter = &dev->i2c_adap;
390 	i2c_del_adapter(&dev->i2c_adap);