88 ns8250_clrint(struct uart_bas *bas)  in ns8250_clrint()  argument
92 	iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
96 			lsr = uart_getreg(bas, REG_LSR);  in ns8250_clrint()
98 				(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
100 			(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
102 			(void)uart_getreg(bas, REG_MSR);  in ns8250_clrint()
103 		uart_barrier(bas);  in ns8250_clrint()
104 		iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
109 ns8250_delay(struct uart_bas *bas)  in ns8250_delay()  argument
114 	lcr = uart_getreg(bas, REG_LCR);  in ns8250_delay()
115 	uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_delay()
116 	uart_barrier(bas);  in ns8250_delay()
117 	divisor = uart_getreg(bas, REG_DLL) | (uart_getreg(bas, REG_DLH) << 8);  in ns8250_delay()
118 	uart_barrier(bas);  in ns8250_delay()
119 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_delay()
120 	uart_barrier(bas);  in ns8250_delay()
124 		return (16000000 * divisor / bas->rclk);  in ns8250_delay()
125 	return (16000 * divisor / (bas->rclk / 1000));  in ns8250_delay()
153 ns8250_drain(struct uart_bas *bas, int what)  in ns8250_drain()  argument
157 	delay = ns8250_delay(bas);  in ns8250_drain()
166 		while ((uart_getreg(bas, REG_LSR) & LSR_TEMT) == 0 && --limit)  in ns8250_drain()
184 		while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) && --limit) {  in ns8250_drain()
185 			(void)uart_getreg(bas, REG_DATA);  in ns8250_drain()
186 			uart_barrier(bas);  in ns8250_drain()
203 ns8250_flush(struct uart_bas *bas, int what)  in ns8250_flush()  argument
215 	uart_setreg(bas, REG_FCR, fcr);  in ns8250_flush()
216 	uart_barrier(bas);  in ns8250_flush()
220 ns8250_param(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_param()  argument
241 		divisor = ns8250_divisor(bas->rclk, baudrate);  in ns8250_param()
244 		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_param()
245 		uart_barrier(bas);  in ns8250_param()
246 		uart_setreg(bas, REG_DLL, divisor & 0xff);  in ns8250_param()
247 		uart_setreg(bas, REG_DLH, (divisor >> 8) & 0xff);  in ns8250_param()
248 		uart_barrier(bas);  in ns8250_param()
252 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_param()
253 	uart_barrier(bas);  in ns8250_param()
260 static int ns8250_probe(struct uart_bas *bas);
261 static void ns8250_init(struct uart_bas *bas, int, int, int, int);
262 static void ns8250_term(struct uart_bas *bas);
263 static void ns8250_putc(struct uart_bas *bas, int);
264 static int ns8250_rxready(struct uart_bas *bas);
265 static int ns8250_getc(struct uart_bas *bas, struct mtx *);
277 ns8250_probe(struct uart_bas *bas)  in ns8250_probe()  argument
282 	uart_setreg(bas, REG_FCR, FCR_UART_ON);  in ns8250_probe()
286 	val = uart_getreg(bas, REG_IIR);  in ns8250_probe()
295 	val = uart_getreg(bas, REG_MCR);  in ns8250_probe()
303 ns8250_init(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_init()  argument
308 	if (bas->rclk == 0)  in ns8250_init()
309 		bas->rclk = DEFAULT_RCLK;  in ns8250_init()
310 	ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_init()
318 	ier = uart_getreg(bas, REG_IER) & 0xe0;  in ns8250_init()
319 	uart_setreg(bas, REG_IER, ier);  in ns8250_init()
320 	uart_barrier(bas);  in ns8250_init()
327 	uart_setreg(bas, REG_FCR, val);  in ns8250_init()
328 	uart_barrier(bas);  in ns8250_init()
331 	uart_setreg(bas, REG_MCR, MCR_IE | MCR_RTS | MCR_DTR);  in ns8250_init()
332 	uart_barrier(bas);  in ns8250_init()
334 	ns8250_clrint(bas);  in ns8250_init()
338 ns8250_term(struct uart_bas *bas)  in ns8250_term()  argument
342 	uart_setreg(bas, REG_MCR, MCR_IE);  in ns8250_term()
343 	uart_barrier(bas);  in ns8250_term()
347 ns8250_putc(struct uart_bas *bas, int c)  in ns8250_putc()  argument
352 	while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0 && --limit)  in ns8250_putc()
354 	uart_setreg(bas, REG_DATA, c);  in ns8250_putc()
355 	uart_barrier(bas);  in ns8250_putc()
359 ns8250_rxready(struct uart_bas *bas)  in ns8250_rxready()  argument
362 	return ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) != 0 ? 1 : 0);  in ns8250_rxready()
366 ns8250_getc(struct uart_bas *bas, struct mtx *hwmtx)  in ns8250_getc()  argument
372 	while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) == 0) {  in ns8250_getc()
378 	c = uart_getreg(bas, REG_DATA);  in ns8250_getc()
484 	struct uart_bas *bas;  in ns8250_bus_attach()  local
498 	bas = &sc->sc_bas;  in ns8250_bus_attach()
500 	ns8250->busy_detect = bas->busy_detect;  in ns8250_bus_attach()
501 	ns8250->mcr = uart_getreg(bas, REG_MCR);  in ns8250_bus_attach()
531 	uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_attach()
532 	uart_barrier(bas);  in ns8250_bus_attach()
541 	ns8250_clrint(bas);  in ns8250_bus_attach()
542 	ns8250->ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_attach()
544 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_attach()
545 	uart_barrier(bas);  in ns8250_bus_attach()
566 	struct uart_bas *bas;  in ns8250_bus_detach()  local
570 	bas = &sc->sc_bas;  in ns8250_bus_detach()
571 	ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_detach()
572 	uart_setreg(bas, REG_IER, ier);  in ns8250_bus_detach()
573 	uart_barrier(bas);  in ns8250_bus_detach()
574 	ns8250_clrint(bas);  in ns8250_bus_detach()
582 	struct uart_bas *bas;  in ns8250_bus_flush()  local
585 	bas = &sc->sc_bas;  in ns8250_bus_flush()
588 		ns8250_flush(bas, what);  in ns8250_bus_flush()
589 		uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_flush()
590 		uart_barrier(bas);  in ns8250_bus_flush()
593 		error = ns8250_drain(bas, what);  in ns8250_bus_flush()
638 	struct uart_bas *bas;  in ns8250_bus_ioctl()  local
642 	bas = &sc->sc_bas;  in ns8250_bus_ioctl()
647 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
652 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
653 		uart_barrier(bas);  in ns8250_bus_ioctl()
656 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
657 		uart_barrier(bas);  in ns8250_bus_ioctl()
658 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
659 		uart_barrier(bas);  in ns8250_bus_ioctl()
660 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
665 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
666 		uart_barrier(bas);  in ns8250_bus_ioctl()
667 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
668 		uart_barrier(bas);  in ns8250_bus_ioctl()
671 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
672 		uart_barrier(bas);  in ns8250_bus_ioctl()
673 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
674 		uart_barrier(bas);  in ns8250_bus_ioctl()
675 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
680 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
681 		uart_barrier(bas);  in ns8250_bus_ioctl()
682 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
683 		uart_barrier(bas);  in ns8250_bus_ioctl()
686 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
687 		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_bus_ioctl()
688 		uart_barrier(bas);  in ns8250_bus_ioctl()
689 		divisor = uart_getreg(bas, REG_DLL) |  in ns8250_bus_ioctl()
690 		    (uart_getreg(bas, REG_DLH) << 8);  in ns8250_bus_ioctl()
691 		uart_barrier(bas);  in ns8250_bus_ioctl()
692 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
693 		uart_barrier(bas);  in ns8250_bus_ioctl()
694 		baudrate = (divisor > 0) ? bas->rclk / divisor / 16 : 0;  in ns8250_bus_ioctl()
711 	struct uart_bas *bas;  in ns8250_bus_ipend()  local
717 	bas = &sc->sc_bas;  in ns8250_bus_ipend()
719 	iir = uart_getreg(bas, REG_IIR);  in ns8250_bus_ipend()
722 		(void)uart_getreg(bas, DW_REG_USR);  in ns8250_bus_ipend()
732 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_ipend()
743 			uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ipend()
744 			uart_barrier(bas);  in ns8250_bus_ipend()
749 		ns8250_clrint(bas);  in ns8250_bus_ipend()
759 	struct uart_bas *bas;  in ns8250_bus_param()  local
763 	bas = &sc->sc_bas;  in ns8250_bus_param()
776 		while (((uart_getreg(bas, DW_REG_USR) & USR_BUSY) != 0) &&  in ns8250_bus_param()
787 	error = ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_bus_param()
795 	struct uart_bas *bas;  in ns8250_bus_probe()  local
800 	bas = &sc->sc_bas;  in ns8250_bus_probe()
802 	error = ns8250_probe(bas);  in ns8250_bus_probe()
809 		ns8250_init(bas, 115200, 8, 1, UART_PARITY_NONE);  in ns8250_bus_probe()
813 	error = ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
823 	uart_setreg(bas, REG_MCR, MCR_LOOPBACK | MCR_IE | MCR_DTR | MCR_RTS);  in ns8250_bus_probe()
824 	uart_barrier(bas);  in ns8250_bus_probe()
835 	uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
836 	uart_barrier(bas);  in ns8250_bus_probe()
837 	if (!(uart_getreg(bas, REG_IIR) & IIR_FIFO_MASK)) {  in ns8250_bus_probe()
842 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
843 		uart_barrier(bas);  in ns8250_bus_probe()
853 	uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
854 	uart_barrier(bas);  in ns8250_bus_probe()
857 	delay = ns8250_delay(bas);  in ns8250_bus_probe()
860 	error = ns8250_drain(bas, UART_DRAIN_RECEIVER|UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
862 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
867 		uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
868 		uart_barrier(bas);  in ns8250_bus_probe()
880 		uart_setreg(bas, REG_DATA, 0);  in ns8250_bus_probe()
881 		uart_barrier(bas);  in ns8250_bus_probe()
890 		while (((lsr |= uart_getreg(bas, REG_LSR)) & LSR_TEMT) == 0 &&  in ns8250_bus_probe()
895 			ier = uart_getreg(bas, REG_IER) & 0xe0;  in ns8250_bus_probe()
896 			uart_setreg(bas, REG_IER, ier);  in ns8250_bus_probe()
897 			uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
902 			uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
903 			uart_barrier(bas);  in ns8250_bus_probe()
910 	uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
913 	ns8250_flush(bas, UART_FLUSH_RECEIVER|UART_FLUSH_TRANSMITTER);  in ns8250_bus_probe()
964 	struct uart_bas *bas;  in ns8250_bus_receive()  local
968 	bas = &sc->sc_bas;  in ns8250_bus_receive()
970 	lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
976 		xc = uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
982 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
986 		(void)uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
987 		uart_barrier(bas);  in ns8250_bus_receive()
988 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
998 	struct uart_bas *bas;  in ns8250_bus_setsig()  local
1001 	bas = &sc->sc_bas;  in ns8250_bus_setsig()
1018 	uart_setreg(bas, REG_MCR, ns8250->mcr);  in ns8250_bus_setsig()
1019 	uart_barrier(bas);  in ns8250_bus_setsig()
1028 	struct uart_bas *bas;  in ns8250_bus_transmit()  local
1031 	bas = &sc->sc_bas;  in ns8250_bus_transmit()
1033 	while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0)  in ns8250_bus_transmit()
1036 		uart_setreg(bas, REG_DATA, sc->sc_txbuf[i]);  in ns8250_bus_transmit()
1037 		uart_barrier(bas);  in ns8250_bus_transmit()
1041 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_transmit()
1042 	uart_barrier(bas);  in ns8250_bus_transmit()
1044 		ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_transmit()
1056 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_grab()  local
1066 	ier = uart_getreg(bas, REG_IER);  in ns8250_bus_grab()
1067 	uart_setreg(bas, REG_IER, ier & ns8250->ier_mask);  in ns8250_bus_grab()
1068 	uart_barrier(bas);  in ns8250_bus_grab()
1076 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_ungrab()  local
1082 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ungrab()
1083 	uart_barrier(bas);  in ns8250_bus_ungrab()