456 	WR4(&sc->sc_bas, USART_IDR, 0xffffffff);  in at91_usart_bus_attach()
457 	WR4(&sc->sc_bas, USART_IER, USART_CSR_TIMEOUT);  in at91_usart_bus_attach()
458 	if (RD4(&sc->sc_bas, USART_IMR) & USART_CSR_TIMEOUT)  in at91_usart_bus_attach()
460 	WR4(&sc->sc_bas, USART_IDR, 0xffffffff);  in at91_usart_bus_attach()
512 	WR4(&sc->sc_bas, USART_CR, cr);  in at91_usart_bus_attach()
513 	WR4(&sc->sc_bas, USART_CR, USART_CR_RXEN | USART_CR_TXEN);  in at91_usart_bus_attach()
522 		WR4(&sc->sc_bas, PDC_RPR, atsc->ping->pa);  in at91_usart_bus_attach()
523 		WR4(&sc->sc_bas, PDC_RCR, sc->sc_rxfifosz);  in at91_usart_bus_attach()
524 		WR4(&sc->sc_bas, PDC_RNPR, atsc->pong->pa);  in at91_usart_bus_attach()
525 		WR4(&sc->sc_bas, PDC_RNCR, sc->sc_rxfifosz);  in at91_usart_bus_attach()
526 		WR4(&sc->sc_bas, PDC_PTCR, PDC_PTCR_RXTEN);  in at91_usart_bus_attach()
532 		WR4(&sc->sc_bas, USART_RTOR, 15);  in at91_usart_bus_attach()
533 		WR4(&sc->sc_bas, USART_CR, USART_CR_STTTO);  in at91_usart_bus_attach()
534 		WR4(&sc->sc_bas, USART_IER, USART_CSR_TIMEOUT |  in at91_usart_bus_attach()
537 		WR4(&sc->sc_bas, USART_IER, USART_CSR_RXRDY);  in at91_usart_bus_attach()
539 	WR4(&sc->sc_bas, USART_IER, USART_CSR_RXBRK | USART_DCE_CHANGE_BITS);  in at91_usart_bus_attach()
569 	WR4(&sc->sc_bas, PDC_TPR, addr);  in at91_usart_bus_transmit()
570 	WR4(&sc->sc_bas, PDC_TCR, sc->sc_txdatasz);  in at91_usart_bus_transmit()
571 	WR4(&sc->sc_bas, PDC_PTCR, PDC_PTCR_TXTEN);  in at91_usart_bus_transmit()
572 	WR4(&sc->sc_bas, USART_IER, USART_CSR_ENDTX);  in at91_usart_bus_transmit()
606 	WR4(&sc->sc_bas, USART_CR, cr);  in at91_usart_bus_setsig()
631 	return (at91_usart_param(&sc->sc_bas, baudrate, databits, stopbits,  in at91_usart_bus_param()
657 	csr = RD4(&sc->sc_bas, USART_CSR);  in at91_usart_bus_ipend()
660 		WR4(&sc->sc_bas, USART_CR, USART_CR_RSTSTA);  in at91_usart_bus_ipend()
675 		WR4(&sc->sc_bas, USART_IDR, csr & (USART_CSR_TXRDY |  in at91_usart_bus_ipend()
693 			WR4(&sc->sc_bas, PDC_PTCR, PDC_PTCR_RXTDIS);  in at91_usart_bus_ipend()
700 			WR4(&sc->sc_bas, PDC_RPR, atsc->ping->pa);  in at91_usart_bus_ipend()
701 			WR4(&sc->sc_bas, PDC_RCR, sc->sc_rxfifosz);  in at91_usart_bus_ipend()
702 			WR4(&sc->sc_bas, PDC_PTCR, PDC_PTCR_RXTEN);  in at91_usart_bus_ipend()
710 			WR4(&sc->sc_bas, PDC_RNPR, atsc->pong->pa);  in at91_usart_bus_ipend()
711 			WR4(&sc->sc_bas, PDC_RNCR, sc->sc_rxfifosz);  in at91_usart_bus_ipend()
729 			WR4(&sc->sc_bas, PDC_RNPR, atsc->pong->pa);  in at91_usart_bus_ipend()
730 			WR4(&sc->sc_bas, PDC_RNCR, sc->sc_rxfifosz);  in at91_usart_bus_ipend()
755 			WR4(&sc->sc_bas, PDC_PTCR, PDC_PTCR_RXTDIS);  in at91_usart_bus_ipend()
756 			if (RD4(&sc->sc_bas, PDC_RNCR) == 0) {  in at91_usart_bus_ipend()
759 				len = sc->sc_rxfifosz - RD4(&sc->sc_bas, PDC_RCR);  in at91_usart_bus_ipend()
760 				WR4(&sc->sc_bas, PDC_RPR, atsc->pong->pa);  in at91_usart_bus_ipend()
761 				WR4(&sc->sc_bas, PDC_RCR, sc->sc_rxfifosz);  in at91_usart_bus_ipend()
762 				WR4(&sc->sc_bas, PDC_RNCR, 0);  in at91_usart_bus_ipend()
764 			WR4(&sc->sc_bas, USART_CR, USART_CR_STTTO);  in at91_usart_bus_ipend()
765 			WR4(&sc->sc_bas, PDC_PTCR, PDC_PTCR_RXTEN);  in at91_usart_bus_ipend()
775 			WR4(&sc->sc_bas, PDC_RNPR, atsc->pong->pa);  in at91_usart_bus_ipend()
776 			WR4(&sc->sc_bas, PDC_RNCR, sc->sc_rxfifosz);  in at91_usart_bus_ipend()
784 		at91_rx_put(sc, RD4(&sc->sc_bas, USART_RHR) & 0xff);  in at91_usart_bus_ipend()
790 		WR4(&sc->sc_bas, USART_CR, USART_CR_RSTSTA);  in at91_usart_bus_ipend()
816 		csr = RD4(&sc->sc_bas, USART_CSR);  in at91_usart_bus_getsig()
839 			WR4(&sc->sc_bas, USART_BRGR,  in at91_usart_bus_ioctl()
852 	WR4(&sc->sc_bas, USART_IDR, USART_CSR_RXRDY);  in at91_usart_bus_grab()
861 	WR4(&sc->sc_bas, USART_IER, USART_CSR_RXRDY);  in at91_usart_bus_ungrab()