157 			__u8 *b, int ack)  in pca_rx_byte()  argument
160 	DEB2("=== READ %#04x %s\n", *b, ack ? "ACK" : "NACK");  in pca_rx_byte()
164  * Setup ACK or NACK for next received byte and wait for it to arrive.
169 		      int ack)  in pca_rx_ack()  argument
175 	if (ack)  in pca_rx_ack()
246 		case 0x18: /* SLA+W has been transmitted; ACK has been received */  in pca_xfer()
247 		case 0x28: /* Data byte in I2CDAT has been transmitted; ACK has been received */  in pca_xfer()
261 		case 0x20: /* SLA+W has been transmitted; NOT ACK has been received */  in pca_xfer()
262 			DEB2("NOT ACK received after SLA+W\n");  in pca_xfer()
267 		case 0x40: /* SLA+R has been transmitted; ACK has been received */  in pca_xfer()
271 		case 0x50: /* Data bytes has been received; ACK has been returned */  in pca_xfer()
286 		case 0x48: /* SLA+R has been transmitted; NOT ACK has been received */  in pca_xfer()
287 			DEB2("NOT ACK received after SLA+R\n");  in pca_xfer()
292 		case 0x30: /* Data byte in I2CDAT has been transmitted; NOT ACK has been received */  in pca_xfer()
293 			DEB2("NOT ACK received after data byte\n");  in pca_xfer()
311 		case 0x58: /* Data byte has been received; NOT ACK has been returned */  in pca_xfer()
320 				DEB2("NOT ACK sent after data byte received. "  in pca_xfer()