86 ns8250_clrint(struct uart_bas *bas)  in ns8250_clrint()  argument
90 	iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
94 			lsr = uart_getreg(bas, REG_LSR);  in ns8250_clrint()
96 				(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
98 			(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
100 			(void)uart_getreg(bas, REG_MSR);  in ns8250_clrint()
101 		uart_barrier(bas);  in ns8250_clrint()
102 		iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
107 ns8250_delay(struct uart_bas *bas)  in ns8250_delay()  argument
112 	lcr = uart_getreg(bas, REG_LCR);  in ns8250_delay()
113 	uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_delay()
114 	uart_barrier(bas);  in ns8250_delay()
115 	divisor = uart_getreg(bas, REG_DLL) | (uart_getreg(bas, REG_DLH) << 8);  in ns8250_delay()
116 	uart_barrier(bas);  in ns8250_delay()
117 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_delay()
118 	uart_barrier(bas);  in ns8250_delay()
122 		return (16000000 * divisor / bas->rclk);  in ns8250_delay()
123 	return (16000 * divisor / (bas->rclk / 1000));  in ns8250_delay()
151 ns8250_drain(struct uart_bas *bas, int what)  in ns8250_drain()  argument
155 	delay = ns8250_delay(bas);  in ns8250_drain()
164 		while ((uart_getreg(bas, REG_LSR) & LSR_TEMT) == 0 && --limit)  in ns8250_drain()
186 		while (limit && (uart_getreg(bas, REG_LSR) & LSR_RXRDY) && --limit) {  in ns8250_drain()
188 				(void)uart_getreg(bas, REG_DATA);  in ns8250_drain()
189 				uart_barrier(bas);  in ns8250_drain()
190 			} while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) && --limit);  in ns8250_drain()
191 			uart_barrier(bas);  in ns8250_drain()
208 ns8250_flush(struct uart_bas *bas, int what)  in ns8250_flush()  argument
222 	uart_setreg(bas, REG_FCR, fcr);  in ns8250_flush()
223 	uart_barrier(bas);  in ns8250_flush()
232 	lsr = uart_getreg(bas, REG_LSR);  in ns8250_flush()
239 		ns8250_drain(bas, drain);  in ns8250_flush()
244 ns8250_param(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_param()  argument
269 		divisor = ns8250_divisor(bas->rclk, baudrate);  in ns8250_param()
272 		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_param()
273 		uart_barrier(bas);  in ns8250_param()
274 		uart_setreg(bas, REG_DLL, divisor & 0xff);  in ns8250_param()
275 		uart_setreg(bas, REG_DLH, (divisor >> 8) & 0xff);  in ns8250_param()
276 		uart_barrier(bas);  in ns8250_param()
280 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_param()
281 	uart_barrier(bas);  in ns8250_param()
288 static int ns8250_probe(struct uart_bas *bas);
289 static void ns8250_init(struct uart_bas *bas, int, int, int, int);
290 static void ns8250_term(struct uart_bas *bas);
291 static void ns8250_putc(struct uart_bas *bas, int);
292 static int ns8250_rxready(struct uart_bas *bas);
293 static int ns8250_getc(struct uart_bas *bas, struct mtx *);
305 ns8250_probe(struct uart_bas *bas)  in ns8250_probe()  argument
310 	uart_setreg(bas, REG_FCR, FCR_UART_ON);  in ns8250_probe()
314 	val = uart_getreg(bas, REG_IIR);  in ns8250_probe()
323 	val = uart_getreg(bas, REG_MCR);  in ns8250_probe()
331 ns8250_init(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_init()  argument
336 	if (bas->rclk == 0)  in ns8250_init()
337 		bas->rclk = DEFAULT_RCLK;  in ns8250_init()
338 	ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_init()
346 	ier = uart_getreg(bas, REG_IER) & 0xe0;  in ns8250_init()
347 	uart_setreg(bas, REG_IER, ier);  in ns8250_init()
348 	uart_barrier(bas);  in ns8250_init()
355 	uart_setreg(bas, REG_FCR, val);  in ns8250_init()
356 	uart_barrier(bas);  in ns8250_init()
359 	uart_setreg(bas, REG_MCR, MCR_IE | MCR_RTS | MCR_DTR);  in ns8250_init()
360 	uart_barrier(bas);  in ns8250_init()
362 	ns8250_clrint(bas);  in ns8250_init()
366 ns8250_term(struct uart_bas *bas)  in ns8250_term()  argument
370 	uart_setreg(bas, REG_MCR, MCR_IE);  in ns8250_term()
371 	uart_barrier(bas);  in ns8250_term()
375 ns8250_putc(struct uart_bas *bas, int c)  in ns8250_putc()  argument
381 		while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0 && --limit)  in ns8250_putc()
384 	uart_setreg(bas, REG_DATA, c);  in ns8250_putc()
385 	uart_barrier(bas);  in ns8250_putc()
389 ns8250_rxready(struct uart_bas *bas)  in ns8250_rxready()  argument
392 	return ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) != 0 ? 1 : 0);  in ns8250_rxready()
396 ns8250_getc(struct uart_bas *bas, struct mtx *hwmtx)  in ns8250_getc()  argument
402 	while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) == 0) {  in ns8250_getc()
408 	c = uart_getreg(bas, REG_DATA);  in ns8250_getc()
517 	struct uart_bas *bas;  in ns8250_bus_attach()  local
531 	bas = &sc->sc_bas;  in ns8250_bus_attach()
533 	ns8250->busy_detect = bas->busy_detect;  in ns8250_bus_attach()
534 	ns8250->mcr = uart_getreg(bas, REG_MCR);  in ns8250_bus_attach()
564 	uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_attach()
565 	uart_barrier(bas);  in ns8250_bus_attach()
574 	ns8250_clrint(bas);  in ns8250_bus_attach()
575 	ns8250->ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_attach()
577 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_attach()
578 	uart_barrier(bas);  in ns8250_bus_attach()
599 	struct uart_bas *bas;  in ns8250_bus_detach()  local
603 	bas = &sc->sc_bas;  in ns8250_bus_detach()
604 	ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_detach()
605 	uart_setreg(bas, REG_IER, ier);  in ns8250_bus_detach()
606 	uart_barrier(bas);  in ns8250_bus_detach()
607 	ns8250_clrint(bas);  in ns8250_bus_detach()
615 	struct uart_bas *bas;  in ns8250_bus_flush()  local
618 	bas = &sc->sc_bas;  in ns8250_bus_flush()
621 		ns8250_flush(bas, what);  in ns8250_bus_flush()
622 		uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_flush()
623 		uart_barrier(bas);  in ns8250_bus_flush()
626 		error = ns8250_drain(bas, what);  in ns8250_bus_flush()
671 	struct uart_bas *bas;  in ns8250_bus_ioctl()  local
675 	bas = &sc->sc_bas;  in ns8250_bus_ioctl()
680 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
685 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
686 		uart_barrier(bas);  in ns8250_bus_ioctl()
689 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
690 		uart_barrier(bas);  in ns8250_bus_ioctl()
691 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
692 		uart_barrier(bas);  in ns8250_bus_ioctl()
693 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
698 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
699 		uart_barrier(bas);  in ns8250_bus_ioctl()
700 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
701 		uart_barrier(bas);  in ns8250_bus_ioctl()
704 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
705 		uart_barrier(bas);  in ns8250_bus_ioctl()
706 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
707 		uart_barrier(bas);  in ns8250_bus_ioctl()
708 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
713 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
714 		uart_barrier(bas);  in ns8250_bus_ioctl()
715 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
716 		uart_barrier(bas);  in ns8250_bus_ioctl()
719 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
720 		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_bus_ioctl()
721 		uart_barrier(bas);  in ns8250_bus_ioctl()
722 		divisor = uart_getreg(bas, REG_DLL) |  in ns8250_bus_ioctl()
723 		    (uart_getreg(bas, REG_DLH) << 8);  in ns8250_bus_ioctl()
724 		uart_barrier(bas);  in ns8250_bus_ioctl()
725 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
726 		uart_barrier(bas);  in ns8250_bus_ioctl()
727 		baudrate = (divisor > 0) ? bas->rclk / divisor / 16 : 0;  in ns8250_bus_ioctl()
744 	struct uart_bas *bas;  in ns8250_bus_ipend()  local
750 	bas = &sc->sc_bas;  in ns8250_bus_ipend()
752 	iir = uart_getreg(bas, REG_IIR);  in ns8250_bus_ipend()
755 		(void)uart_getreg(bas, DW_REG_USR);  in ns8250_bus_ipend()
765 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_ipend()
776 			uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ipend()
777 			uart_barrier(bas);  in ns8250_bus_ipend()
782 		ns8250_clrint(bas);  in ns8250_bus_ipend()
792 	struct uart_bas *bas;  in ns8250_bus_param()  local
796 	bas = &sc->sc_bas;  in ns8250_bus_param()
809 		while (((uart_getreg(bas, DW_REG_USR) & USR_BUSY) != 0) &&  in ns8250_bus_param()
820 	error = ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_bus_param()
828 	struct uart_bas *bas;  in ns8250_bus_probe()  local
833 	bas = &sc->sc_bas;  in ns8250_bus_probe()
835 	error = ns8250_probe(bas);  in ns8250_bus_probe()
842 		ns8250_init(bas, 115200, 8, 1, UART_PARITY_NONE);  in ns8250_bus_probe()
846 	error = ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
856 	uart_setreg(bas, REG_MCR, MCR_LOOPBACK | MCR_IE | MCR_DTR | MCR_RTS);  in ns8250_bus_probe()
857 	uart_barrier(bas);  in ns8250_bus_probe()
868 	uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
869 	uart_barrier(bas);  in ns8250_bus_probe()
870 	if (!(uart_getreg(bas, REG_IIR) & IIR_FIFO_MASK)) {  in ns8250_bus_probe()
875 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
876 		uart_barrier(bas);  in ns8250_bus_probe()
886 	uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
887 	uart_barrier(bas);  in ns8250_bus_probe()
890 	delay = ns8250_delay(bas);  in ns8250_bus_probe()
893 	error = ns8250_drain(bas, UART_DRAIN_RECEIVER|UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
895 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
900 		uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
901 		uart_barrier(bas);  in ns8250_bus_probe()
913 		uart_setreg(bas, REG_DATA, 0);  in ns8250_bus_probe()
914 		uart_barrier(bas);  in ns8250_bus_probe()
923 		while (((lsr |= uart_getreg(bas, REG_LSR)) & LSR_TEMT) == 0 &&  in ns8250_bus_probe()
928 			ier = uart_getreg(bas, REG_IER) & 0xe0;  in ns8250_bus_probe()
929 			uart_setreg(bas, REG_IER, ier);  in ns8250_bus_probe()
930 			uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
935 			uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
936 			uart_barrier(bas);  in ns8250_bus_probe()
943 	uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
946 	ns8250_flush(bas, UART_FLUSH_RECEIVER|UART_FLUSH_TRANSMITTER);  in ns8250_bus_probe()
997 	struct uart_bas *bas;  in ns8250_bus_receive()  local
1001 	bas = &sc->sc_bas;  in ns8250_bus_receive()
1003 	lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
1009 		xc = uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
1015 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
1019 		(void)uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
1020 		uart_barrier(bas);  in ns8250_bus_receive()
1021 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
1031 	struct uart_bas *bas;  in ns8250_bus_setsig()  local
1034 	bas = &sc->sc_bas;  in ns8250_bus_setsig()
1051 	uart_setreg(bas, REG_MCR, ns8250->mcr);  in ns8250_bus_setsig()
1052 	uart_barrier(bas);  in ns8250_bus_setsig()
1061 	struct uart_bas *bas;  in ns8250_bus_transmit()  local
1064 	bas = &sc->sc_bas;  in ns8250_bus_transmit()
1066 	while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0)  in ns8250_bus_transmit()
1069 		uart_setreg(bas, REG_DATA, sc->sc_txbuf[i]);  in ns8250_bus_transmit()
1070 		uart_barrier(bas);  in ns8250_bus_transmit()
1074 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_transmit()
1075 	uart_barrier(bas);  in ns8250_bus_transmit()
1077 		ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_transmit()
1089 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_txbusy()  local
1091 	if ((uart_getreg(bas, REG_LSR) & (LSR_TEMT | LSR_THRE)) !=  in ns8250_bus_txbusy()
1100 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_grab()  local
1110 	ier = uart_getreg(bas, REG_IER);  in ns8250_bus_grab()
1111 	uart_setreg(bas, REG_IER, ier & ns8250->ier_mask);  in ns8250_bus_grab()
1112 	uart_barrier(bas);  in ns8250_bus_grab()
1120 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_ungrab()  local
1126 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ungrab()
1127 	uart_barrier(bas);  in ns8250_bus_ungrab()