150 ns8250_clrint(struct uart_bas *bas)  in ns8250_clrint()  argument
154 	iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
158 			lsr = uart_getreg(bas, REG_LSR);  in ns8250_clrint()
160 				(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
162 			(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
164 			(void)uart_getreg(bas, REG_MSR);  in ns8250_clrint()
165 		uart_barrier(bas);  in ns8250_clrint()
166 		iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
171 ns8250_get_divisor(struct uart_bas *bas)  in ns8250_get_divisor()  argument
176 	lcr = uart_getreg(bas, REG_LCR);  in ns8250_get_divisor()
177 	uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_get_divisor()
178 	uart_barrier(bas);  in ns8250_get_divisor()
179 	divisor = uart_getreg(bas, REG_DLL) | (uart_getreg(bas, REG_DLH) << 8);  in ns8250_get_divisor()
180 	uart_barrier(bas);  in ns8250_get_divisor()
181 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_get_divisor()
182 	uart_barrier(bas);  in ns8250_get_divisor()
188 ns8250_delay(struct uart_bas *bas)  in ns8250_delay()  argument
192 	divisor = ns8250_get_divisor(bas);  in ns8250_delay()
196 		return (16000000 * divisor / bas->rclk);  in ns8250_delay()
197 	return (16000 * divisor / (bas->rclk / 1000));  in ns8250_delay()
225 ns8250_drain(struct uart_bas *bas, int what)  in ns8250_drain()  argument
229 	delay = ns8250_delay(bas);  in ns8250_drain()
238 		while ((uart_getreg(bas, REG_LSR) & LSR_TEMT) == 0 && --limit)  in ns8250_drain()
260 		while (limit && (uart_getreg(bas, REG_LSR) & LSR_RXRDY) && --limit) {  in ns8250_drain()
262 				(void)uart_getreg(bas, REG_DATA);  in ns8250_drain()
263 				uart_barrier(bas);  in ns8250_drain()
264 			} while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) && --limit);  in ns8250_drain()
265 			uart_barrier(bas);  in ns8250_drain()
282 ns8250_flush(struct uart_bas *bas, int what)  in ns8250_flush()  argument
293 	uart_setreg(bas, REG_FCR, fcr);  in ns8250_flush()
294 	uart_barrier(bas);  in ns8250_flush()
303 	lsr = uart_getreg(bas, REG_LSR);  in ns8250_flush()
310 		ns8250_drain(bas, drain);  in ns8250_flush()
315 ns8250_param(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_param()  argument
339 	if (baudrate > 0 && bas->rclk > 0) {  in ns8250_param()
340 		divisor = ns8250_divisor(bas->rclk, baudrate);  in ns8250_param()
343 		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_param()
344 		uart_barrier(bas);  in ns8250_param()
345 		uart_setreg(bas, REG_DLL, divisor & 0xff);  in ns8250_param()
346 		uart_setreg(bas, REG_DLH, (divisor >> 8) & 0xff);  in ns8250_param()
347 		uart_barrier(bas);  in ns8250_param()
351 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_param()
352 	uart_barrier(bas);  in ns8250_param()
359 static int ns8250_probe(struct uart_bas *bas);
360 static void ns8250_init(struct uart_bas *bas, int, int, int, int);
361 static void ns8250_term(struct uart_bas *bas);
362 static void ns8250_putc(struct uart_bas *bas, int);
363 static int ns8250_rxready(struct uart_bas *bas);
364 static int ns8250_getc(struct uart_bas *bas, struct mtx *);
376 ns8250_probe(struct uart_bas *bas)  in ns8250_probe()  argument
381 	val = uart_getreg(bas, REG_IIR);  in ns8250_probe()
390 	val = uart_getreg(bas, REG_MCR);  in ns8250_probe()
398 ns8250_init(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_init()  argument
409 	ier = uart_getreg(bas, REG_IER) & 0xe0;  in ns8250_init()
410 	uart_setreg(bas, REG_IER, ier);  in ns8250_init()
411 	uart_barrier(bas);  in ns8250_init()
420 	if (bas->rclk_guess && bas->rclk == 0 && baudrate != 0) {  in ns8250_init()
423 		div = ns8250_get_divisor(bas);  in ns8250_init()
424 		bas->rclk = baudrate * div * 16;  in ns8250_init()
432 	if (bas->rclk == 0 && baudrate != 0)  in ns8250_init()
433 		bas->rclk = DEFAULT_RCLK;  in ns8250_init()
435 	ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_init()
438 	uart_setreg(bas, REG_FCR, 0);  in ns8250_init()
439 	uart_barrier(bas);  in ns8250_init()
442 	uart_setreg(bas, REG_MCR, MCR_IE | MCR_RTS | MCR_DTR);  in ns8250_init()
443 	uart_barrier(bas);  in ns8250_init()
445 	ns8250_clrint(bas);  in ns8250_init()
449 ns8250_term(struct uart_bas *bas)  in ns8250_term()  argument
453 	uart_setreg(bas, REG_MCR, MCR_IE);  in ns8250_term()
454 	uart_barrier(bas);  in ns8250_term()
458 ns8250_putc(struct uart_bas *bas, int c)  in ns8250_putc()  argument
464 		while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0 && --limit)  in ns8250_putc()
467 	uart_setreg(bas, REG_DATA, c);  in ns8250_putc()
468 	uart_barrier(bas);  in ns8250_putc()
472 ns8250_rxready(struct uart_bas *bas)  in ns8250_rxready()  argument
475 	return ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) != 0 ? 1 : 0);  in ns8250_rxready()
479 ns8250_getc(struct uart_bas *bas, struct mtx *hwmtx)  in ns8250_getc()  argument
485 	while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) == 0) {  in ns8250_getc()
491 	c = uart_getreg(bas, REG_DATA);  in ns8250_getc()
610 	struct uart_bas *bas;  in ns8250_bus_attach()  local
624 	bas = &sc->sc_bas;  in ns8250_bus_attach()
626 	ns8250->busy_detect = bas->busy_detect;  in ns8250_bus_attach()
627 	ns8250->mcr = uart_getreg(bas, REG_MCR);  in ns8250_bus_attach()
654 	uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_attach()
655 	uart_barrier(bas);  in ns8250_bus_attach()
664 	ns8250_clrint(bas);  in ns8250_bus_attach()
665 	ns8250->ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_attach()
667 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_attach()
668 	uart_barrier(bas);  in ns8250_bus_attach()
689 	struct uart_bas *bas;  in ns8250_bus_detach()  local
693 	bas = &sc->sc_bas;  in ns8250_bus_detach()
694 	ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_detach()
695 	uart_setreg(bas, REG_IER, ier);  in ns8250_bus_detach()
696 	uart_barrier(bas);  in ns8250_bus_detach()
697 	ns8250_clrint(bas);  in ns8250_bus_detach()
705 	struct uart_bas *bas;  in ns8250_bus_flush()  local
708 	bas = &sc->sc_bas;  in ns8250_bus_flush()
711 		ns8250_flush(bas, what);  in ns8250_bus_flush()
712 		uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_flush()
713 		uart_barrier(bas);  in ns8250_bus_flush()
716 		error = ns8250_drain(bas, what);  in ns8250_bus_flush()
761 	struct uart_bas *bas;  in ns8250_bus_ioctl()  local
765 	bas = &sc->sc_bas;  in ns8250_bus_ioctl()
770 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
775 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
776 		uart_barrier(bas);  in ns8250_bus_ioctl()
779 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
780 		uart_barrier(bas);  in ns8250_bus_ioctl()
781 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
782 		uart_barrier(bas);  in ns8250_bus_ioctl()
783 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
788 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
789 		uart_barrier(bas);  in ns8250_bus_ioctl()
790 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
791 		uart_barrier(bas);  in ns8250_bus_ioctl()
794 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
795 		uart_barrier(bas);  in ns8250_bus_ioctl()
796 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
797 		uart_barrier(bas);  in ns8250_bus_ioctl()
798 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
803 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
804 		uart_barrier(bas);  in ns8250_bus_ioctl()
805 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
806 		uart_barrier(bas);  in ns8250_bus_ioctl()
809 		divisor = ns8250_get_divisor(bas);  in ns8250_bus_ioctl()
810 		baudrate = (divisor > 0) ? bas->rclk / divisor / 16 : 0;  in ns8250_bus_ioctl()
827 	struct uart_bas *bas;  in ns8250_bus_ipend()  local
833 	bas = &sc->sc_bas;  in ns8250_bus_ipend()
835 	iir = uart_getreg(bas, REG_IIR);  in ns8250_bus_ipend()
838 		(void)uart_getreg(bas, DW_REG_USR);  in ns8250_bus_ipend()
848 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_ipend()
859 			uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ipend()
860 			uart_barrier(bas);  in ns8250_bus_ipend()
865 		ns8250_clrint(bas);  in ns8250_bus_ipend()
875 	struct uart_bas *bas;  in ns8250_bus_param()  local
879 	bas = &sc->sc_bas;  in ns8250_bus_param()
892 		while (((uart_getreg(bas, DW_REG_USR) & USR_BUSY) != 0) &&  in ns8250_bus_param()
903 	error = ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_bus_param()
911 	struct uart_bas *bas;  in ns8250_bus_probe()  local
915 	bas = &sc->sc_bas;  in ns8250_bus_probe()
917 	error = ns8250_probe(bas);  in ns8250_bus_probe()
924 		ns8250_init(bas, 115200, 8, 1, UART_PARITY_NONE);  in ns8250_bus_probe()
928 	error = ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
938 	uart_setreg(bas, REG_MCR, MCR_LOOPBACK | MCR_IE | MCR_DTR | MCR_RTS);  in ns8250_bus_probe()
939 	uart_barrier(bas);  in ns8250_bus_probe()
946 	uart_setreg(bas, REG_FCR, FCR_ENABLE);  in ns8250_bus_probe()
947 	uart_barrier(bas);  in ns8250_bus_probe()
948 	if (!(uart_getreg(bas, REG_IIR) & IIR_FIFO_MASK)) {  in ns8250_bus_probe()
953 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
954 		uart_barrier(bas);  in ns8250_bus_probe()
960 	uart_setreg(bas, REG_FCR, FCR_ENABLE | FCR_XMT_RST | FCR_RCV_RST);  in ns8250_bus_probe()
961 	uart_barrier(bas);  in ns8250_bus_probe()
964 	delay = ns8250_delay(bas);  in ns8250_bus_probe()
967 	error = ns8250_drain(bas, UART_DRAIN_RECEIVER|UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
969 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
970 		uart_setreg(bas, REG_FCR, 0);  in ns8250_bus_probe()
971 		uart_barrier(bas);  in ns8250_bus_probe()
983 		uart_setreg(bas, REG_DATA, 0);  in ns8250_bus_probe()
984 		uart_barrier(bas);  in ns8250_bus_probe()
993 		while (((lsr |= uart_getreg(bas, REG_LSR)) & LSR_TEMT) == 0 &&  in ns8250_bus_probe()
998 			ier = uart_getreg(bas, REG_IER) & 0xe0;  in ns8250_bus_probe()
999 			uart_setreg(bas, REG_IER, ier);  in ns8250_bus_probe()
1000 			uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
1001 			uart_setreg(bas, REG_FCR, 0);  in ns8250_bus_probe()
1002 			uart_barrier(bas);  in ns8250_bus_probe()
1009 	uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
1012 	ns8250_flush(bas, UART_FLUSH_RECEIVER|UART_FLUSH_TRANSMITTER);  in ns8250_bus_probe()
1063 	struct uart_bas *bas;  in ns8250_bus_receive()  local
1068 	bas = &sc->sc_bas;  in ns8250_bus_receive()
1070 	lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
1087 		xc = uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
1093 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
1097 		(void)uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
1098 		uart_barrier(bas);  in ns8250_bus_receive()
1099 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
1109 	struct uart_bas *bas;  in ns8250_bus_setsig()  local
1112 	bas = &sc->sc_bas;  in ns8250_bus_setsig()
1129 	uart_setreg(bas, REG_MCR, ns8250->mcr);  in ns8250_bus_setsig()
1130 	uart_barrier(bas);  in ns8250_bus_setsig()
1139 	struct uart_bas *bas;  in ns8250_bus_transmit()  local
1142 	bas = &sc->sc_bas;  in ns8250_bus_transmit()
1144 	while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0)  in ns8250_bus_transmit()
1147 		uart_setreg(bas, REG_DATA, sc->sc_txbuf[i]);  in ns8250_bus_transmit()
1148 		uart_barrier(bas);  in ns8250_bus_transmit()
1152 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_transmit()
1153 	uart_barrier(bas);  in ns8250_bus_transmit()
1155 		ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_transmit()
1167 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_txbusy()  local
1169 	if ((uart_getreg(bas, REG_LSR) & (LSR_TEMT | LSR_THRE)) !=  in ns8250_bus_txbusy()
1178 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_grab()  local
1188 	ier = uart_getreg(bas, REG_IER);  in ns8250_bus_grab()
1189 	uart_setreg(bas, REG_IER, ier & ns8250->ier_mask);  in ns8250_bus_grab()
1190 	uart_barrier(bas);  in ns8250_bus_grab()
1198 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_ungrab()  local
1204 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ungrab()
1205 	uart_barrier(bas);  in ns8250_bus_ungrab()