830 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_chars()  local
839 	if (uart_circ_empty(xmit) || uart_tx_stopped(port))  in atmel_tx_chars()
844 		atmel_uart_write_char(port, xmit->buf[xmit->tail]);  in atmel_tx_chars()
845 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in atmel_tx_chars()
847 		if (uart_circ_empty(xmit))  in atmel_tx_chars()
851 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_chars()
854 	if (!uart_circ_empty(xmit))  in atmel_tx_chars()
864 	struct circ_buf *xmit = &port->state->xmit;  in atmel_complete_tx_dma()  local
872 	xmit->tail += atmel_port->tx_len;  in atmel_complete_tx_dma()
873 	xmit->tail &= UART_XMIT_SIZE - 1;  in atmel_complete_tx_dma()
883 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_complete_tx_dma()
891 	if (!uart_circ_empty(xmit))  in atmel_complete_tx_dma()
929 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_dma()  local
940 	if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {  in atmel_tx_dma()
950 		tx_len = CIRC_CNT_TO_END(xmit->head,  in atmel_tx_dma()
951 					 xmit->tail,  in atmel_tx_dma()
966 		phys_addr = sg_dma_address(sg_tx) + xmit->tail;  in atmel_tx_dma()
1006 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_dma()
1030 	BUG_ON(!PAGE_ALIGNED(port->state->xmit.buf));  in atmel_prepare_tx_dma()
1032 			virt_to_page(port->state->xmit.buf),  in atmel_prepare_tx_dma()
1034 			offset_in_page(port->state->xmit.buf));  in atmel_prepare_tx_dma()
1046 			port->state->xmit.buf,  in atmel_prepare_tx_dma()
1453 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_pdc()  local
1461 	xmit->tail += pdc->ofs;  in atmel_tx_pdc()
1462 	xmit->tail &= UART_XMIT_SIZE - 1;  in atmel_tx_pdc()
1472 	if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {  in atmel_tx_pdc()
1478 		count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);  in atmel_tx_pdc()
1482 				  pdc->dma_addr + xmit->tail);  in atmel_tx_pdc()
1496 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_pdc()
1504 	struct circ_buf *xmit = &port->state->xmit;  in atmel_prepare_tx_pdc()  local
1506 	pdc->buf = xmit->buf;  in atmel_prepare_tx_pdc()