737 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_chars()  local
746 	if (uart_circ_empty(xmit) || uart_tx_stopped(port))  in atmel_tx_chars()
751 		atmel_uart_write_char(port, xmit->buf[xmit->tail]);  in atmel_tx_chars()
752 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);  in atmel_tx_chars()
754 		if (uart_circ_empty(xmit))  in atmel_tx_chars()
758 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_chars()
761 	if (!uart_circ_empty(xmit))  in atmel_tx_chars()
771 	struct circ_buf *xmit = &port->state->xmit;  in atmel_complete_tx_dma()  local
779 	xmit->tail += atmel_port->tx_len;  in atmel_complete_tx_dma()
780 	xmit->tail &= UART_XMIT_SIZE - 1;  in atmel_complete_tx_dma()
790 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_complete_tx_dma()
798 	if (!uart_circ_empty(xmit))  in atmel_complete_tx_dma()
827 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_dma()  local
838 	if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {  in atmel_tx_dma()
848 		tx_len = CIRC_CNT_TO_END(xmit->head,  in atmel_tx_dma()
849 					 xmit->tail,  in atmel_tx_dma()
864 		phys_addr = sg_dma_address(sg_tx) + xmit->tail;  in atmel_tx_dma()
910 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_dma()
933 	BUG_ON(!PAGE_ALIGNED(port->state->xmit.buf));  in atmel_prepare_tx_dma()
935 			virt_to_page(port->state->xmit.buf),  in atmel_prepare_tx_dma()
937 			(unsigned long)port->state->xmit.buf & ~PAGE_MASK);  in atmel_prepare_tx_dma()
949 			port->state->xmit.buf,  in atmel_prepare_tx_dma()
1338 	struct circ_buf *xmit = &port->state->xmit;  in atmel_tx_pdc()  local
1346 	xmit->tail += pdc->ofs;  in atmel_tx_pdc()
1347 	xmit->tail &= UART_XMIT_SIZE - 1;  in atmel_tx_pdc()
1357 	if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {  in atmel_tx_pdc()
1363 		count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);  in atmel_tx_pdc()
1367 				  pdc->dma_addr + xmit->tail);  in atmel_tx_pdc()
1382 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)  in atmel_tx_pdc()
1390 	struct circ_buf *xmit = &port->state->xmit;  in atmel_prepare_tx_pdc()  local
1392 	pdc->buf = xmit->buf;  in atmel_prepare_tx_pdc()