436 static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,  in mtk_i2c_do_transfer()  argument
471 	addr_reg = i2c_8bit_addr_from_msg(msgs);  in mtk_i2c_do_transfer()
486 			writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);  in mtk_i2c_do_transfer()
487 			writew((msgs + 1)->len, i2c->base +  in mtk_i2c_do_transfer()
490 			writew(msgs->len | ((msgs + 1)->len) << 8,  in mtk_i2c_do_transfer()
495 		writew(msgs->len, i2c->base + OFFSET_TRANSFER_LEN);  in mtk_i2c_do_transfer()
503 		rpaddr = dma_map_single(i2c->dev, msgs->buf,  in mtk_i2c_do_transfer()
504 					msgs->len, DMA_FROM_DEVICE);  in mtk_i2c_do_transfer()
514 		writel(msgs->len, i2c->pdmabase + OFFSET_RX_LEN);  in mtk_i2c_do_transfer()
518 		wpaddr = dma_map_single(i2c->dev, msgs->buf,  in mtk_i2c_do_transfer()
519 					msgs->len, DMA_TO_DEVICE);  in mtk_i2c_do_transfer()
529 		writel(msgs->len, i2c->pdmabase + OFFSET_TX_LEN);  in mtk_i2c_do_transfer()
533 		wpaddr = dma_map_single(i2c->dev, msgs->buf,  in mtk_i2c_do_transfer()
534 					msgs->len, DMA_TO_DEVICE);  in mtk_i2c_do_transfer()
537 		rpaddr = dma_map_single(i2c->dev, (msgs + 1)->buf,  in mtk_i2c_do_transfer()
538 					(msgs + 1)->len,  in mtk_i2c_do_transfer()
542 					 msgs->len, DMA_TO_DEVICE);  in mtk_i2c_do_transfer()
556 		writel(msgs->len, i2c->pdmabase + OFFSET_TX_LEN);  in mtk_i2c_do_transfer()
557 		writel((msgs + 1)->len, i2c->pdmabase + OFFSET_RX_LEN);  in mtk_i2c_do_transfer()
580 				 msgs->len, DMA_TO_DEVICE);  in mtk_i2c_do_transfer()
583 				 msgs->len, DMA_FROM_DEVICE);  in mtk_i2c_do_transfer()
585 		dma_unmap_single(i2c->dev, wpaddr, msgs->len,  in mtk_i2c_do_transfer()
587 		dma_unmap_single(i2c->dev, rpaddr, (msgs + 1)->len,  in mtk_i2c_do_transfer()
592 		dev_dbg(i2c->dev, "addr: %x, transfer timeout\n", msgs->addr);  in mtk_i2c_do_transfer()
600 		dev_dbg(i2c->dev, "addr: %x, transfer ACK error\n", msgs->addr);  in mtk_i2c_do_transfer()
609 			    struct i2c_msg msgs[], int num)  in mtk_i2c_transfer()  argument
623 		if (!(msgs[0].flags & I2C_M_RD) && (msgs[1].flags & I2C_M_RD) &&  in mtk_i2c_transfer()
624 		    msgs[0].addr == msgs[1].addr) {  in mtk_i2c_transfer()
638 		if (!msgs->buf) {  in mtk_i2c_transfer()
644 		if (msgs->flags & I2C_M_RD)  in mtk_i2c_transfer()
658 		ret = mtk_i2c_do_transfer(i2c, msgs, num, left_num);  in mtk_i2c_transfer()
662 		msgs++;  in mtk_i2c_transfer()