827 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_chars()  local
836 	if (uart_circ_empty(xmit) || uart_tx_stopped(port))  in atmel_tx_chars()
840 		atmel_uart_write_char(port, xmit->buf[xmit->tail]);  in atmel_tx_chars()
841 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in atmel_tx_chars()
843 		if (uart_circ_empty(xmit))  in atmel_tx_chars()
847 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_chars()
850 	if (!uart_circ_empty(xmit)) {  in atmel_tx_chars()
870 	struct circ_buf *xmit = &port->state->xmit;  in atmel_complete_tx_dma()  local
878 	xmit->tail += atmel_port->tx_len;  in atmel_complete_tx_dma()
879 	xmit->tail &= UART_XMIT_SIZE - 1;  in atmel_complete_tx_dma()
889 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_complete_tx_dma()
897 	if (!uart_circ_empty(xmit))  in atmel_complete_tx_dma()
935 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_dma()  local
946 	if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {  in atmel_tx_dma()
956 		tx_len = CIRC_CNT_TO_END(xmit->head,  in atmel_tx_dma()
957 					 xmit->tail,  in atmel_tx_dma()
972 		phys_addr = sg_dma_address(sg_tx) + xmit->tail;  in atmel_tx_dma()
1019 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_dma()
1043 	BUG_ON(!PAGE_ALIGNED(port->state->xmit.buf));  in atmel_prepare_tx_dma()
1045 			virt_to_page(port->state->xmit.buf),  in atmel_prepare_tx_dma()
1047 			offset_in_page(port->state->xmit.buf));  in atmel_prepare_tx_dma()
1059 			port->state->xmit.buf,  in atmel_prepare_tx_dma()
1467 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_pdc()  local
1475 	xmit->tail += pdc->ofs;  in atmel_tx_pdc()
1476 	xmit->tail &= UART_XMIT_SIZE - 1;  in atmel_tx_pdc()
1486 	if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {  in atmel_tx_pdc()
1492 		count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);  in atmel_tx_pdc()
1496 				  pdc->dma_addr + xmit->tail);  in atmel_tx_pdc()
1510 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_pdc()
1518 	struct circ_buf *xmit = &port->state->xmit;  in atmel_prepare_tx_pdc()  local
1520 	pdc->buf = xmit->buf;  in atmel_prepare_tx_pdc()