87 ns8250_clrint(struct uart_bas *bas)  in ns8250_clrint()  argument
91 	iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
95 			lsr = uart_getreg(bas, REG_LSR);  in ns8250_clrint()
97 				(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
99 			(void)uart_getreg(bas, REG_DATA);  in ns8250_clrint()
101 			(void)uart_getreg(bas, REG_MSR);  in ns8250_clrint()
102 		uart_barrier(bas);  in ns8250_clrint()
103 		iir = uart_getreg(bas, REG_IIR);  in ns8250_clrint()
108 ns8250_delay(struct uart_bas *bas)  in ns8250_delay()  argument
113 	lcr = uart_getreg(bas, REG_LCR);  in ns8250_delay()
114 	uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_delay()
115 	uart_barrier(bas);  in ns8250_delay()
116 	divisor = uart_getreg(bas, REG_DLL) | (uart_getreg(bas, REG_DLH) << 8);  in ns8250_delay()
117 	uart_barrier(bas);  in ns8250_delay()
118 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_delay()
119 	uart_barrier(bas);  in ns8250_delay()
123 		return (16000000 * divisor / bas->rclk);  in ns8250_delay()
124 	return (16000 * divisor / (bas->rclk / 1000));  in ns8250_delay()
152 ns8250_drain(struct uart_bas *bas, int what)  in ns8250_drain()  argument
156 	delay = ns8250_delay(bas);  in ns8250_drain()
165 		while ((uart_getreg(bas, REG_LSR) & LSR_TEMT) == 0 && --limit)  in ns8250_drain()
183 		while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) && --limit) {  in ns8250_drain()
184 			(void)uart_getreg(bas, REG_DATA);  in ns8250_drain()
185 			uart_barrier(bas);  in ns8250_drain()
202 ns8250_flush(struct uart_bas *bas, int what)  in ns8250_flush()  argument
214 	uart_setreg(bas, REG_FCR, fcr);  in ns8250_flush()
215 	uart_barrier(bas);  in ns8250_flush()
219 ns8250_param(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_param()  argument
240 		divisor = ns8250_divisor(bas->rclk, baudrate);  in ns8250_param()
243 		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_param()
244 		uart_barrier(bas);  in ns8250_param()
245 		uart_setreg(bas, REG_DLL, divisor & 0xff);  in ns8250_param()
246 		uart_setreg(bas, REG_DLH, (divisor >> 8) & 0xff);  in ns8250_param()
247 		uart_barrier(bas);  in ns8250_param()
251 	uart_setreg(bas, REG_LCR, lcr);  in ns8250_param()
252 	uart_barrier(bas);  in ns8250_param()
259 static int ns8250_probe(struct uart_bas *bas);
260 static void ns8250_init(struct uart_bas *bas, int, int, int, int);
261 static void ns8250_term(struct uart_bas *bas);
262 static void ns8250_putc(struct uart_bas *bas, int);
263 static int ns8250_rxready(struct uart_bas *bas);
264 static int ns8250_getc(struct uart_bas *bas, struct mtx *);
276 ns8250_probe(struct uart_bas *bas)  in ns8250_probe()  argument
281 	uart_setreg(bas, REG_FCR, FCR_UART_ON);  in ns8250_probe()
285 	val = uart_getreg(bas, REG_IIR);  in ns8250_probe()
294 	val = uart_getreg(bas, REG_MCR);  in ns8250_probe()
302 ns8250_init(struct uart_bas *bas, int baudrate, int databits, int stopbits,  in ns8250_init()  argument
307 	if (bas->rclk == 0)  in ns8250_init()
308 		bas->rclk = DEFAULT_RCLK;  in ns8250_init()
309 	ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_init()
317 	ier = uart_getreg(bas, REG_IER) & 0xe0;  in ns8250_init()
318 	uart_setreg(bas, REG_IER, ier);  in ns8250_init()
319 	uart_barrier(bas);  in ns8250_init()
326 	uart_setreg(bas, REG_FCR, val);  in ns8250_init()
327 	uart_barrier(bas);  in ns8250_init()
330 	uart_setreg(bas, REG_MCR, MCR_IE | MCR_RTS | MCR_DTR);  in ns8250_init()
331 	uart_barrier(bas);  in ns8250_init()
333 	ns8250_clrint(bas);  in ns8250_init()
337 ns8250_term(struct uart_bas *bas)  in ns8250_term()  argument
341 	uart_setreg(bas, REG_MCR, MCR_IE);  in ns8250_term()
342 	uart_barrier(bas);  in ns8250_term()
346 ns8250_putc(struct uart_bas *bas, int c)  in ns8250_putc()  argument
351 	while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0 && --limit)  in ns8250_putc()
353 	uart_setreg(bas, REG_DATA, c);  in ns8250_putc()
354 	uart_barrier(bas);  in ns8250_putc()
358 ns8250_rxready(struct uart_bas *bas)  in ns8250_rxready()  argument
361 	return ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) != 0 ? 1 : 0);  in ns8250_rxready()
365 ns8250_getc(struct uart_bas *bas, struct mtx *hwmtx)  in ns8250_getc()  argument
371 	while ((uart_getreg(bas, REG_LSR) & LSR_RXRDY) == 0) {  in ns8250_getc()
377 	c = uart_getreg(bas, REG_DATA);  in ns8250_getc()
480 	struct uart_bas *bas;  in ns8250_bus_attach()  local
494 	bas = &sc->sc_bas;  in ns8250_bus_attach()
496 	ns8250->busy_detect = bas->busy_detect;  in ns8250_bus_attach()
497 	ns8250->mcr = uart_getreg(bas, REG_MCR);  in ns8250_bus_attach()
527 	uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_attach()
528 	uart_barrier(bas);  in ns8250_bus_attach()
537 	ns8250_clrint(bas);  in ns8250_bus_attach()
538 	ns8250->ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_attach()
540 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_attach()
541 	uart_barrier(bas);  in ns8250_bus_attach()
562 	struct uart_bas *bas;  in ns8250_bus_detach()  local
566 	bas = &sc->sc_bas;  in ns8250_bus_detach()
567 	ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_detach()
568 	uart_setreg(bas, REG_IER, ier);  in ns8250_bus_detach()
569 	uart_barrier(bas);  in ns8250_bus_detach()
570 	ns8250_clrint(bas);  in ns8250_bus_detach()
578 	struct uart_bas *bas;  in ns8250_bus_flush()  local
581 	bas = &sc->sc_bas;  in ns8250_bus_flush()
584 		ns8250_flush(bas, what);  in ns8250_bus_flush()
585 		uart_setreg(bas, REG_FCR, ns8250->fcr);  in ns8250_bus_flush()
586 		uart_barrier(bas);  in ns8250_bus_flush()
589 		error = ns8250_drain(bas, what);  in ns8250_bus_flush()
634 	struct uart_bas *bas;  in ns8250_bus_ioctl()  local
638 	bas = &sc->sc_bas;  in ns8250_bus_ioctl()
643 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
648 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
649 		uart_barrier(bas);  in ns8250_bus_ioctl()
652 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
653 		uart_barrier(bas);  in ns8250_bus_ioctl()
654 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
655 		uart_barrier(bas);  in ns8250_bus_ioctl()
656 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
661 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
662 		uart_barrier(bas);  in ns8250_bus_ioctl()
663 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
664 		uart_barrier(bas);  in ns8250_bus_ioctl()
667 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
668 		uart_barrier(bas);  in ns8250_bus_ioctl()
669 		uart_setreg(bas, REG_LCR, 0xbf);  in ns8250_bus_ioctl()
670 		uart_barrier(bas);  in ns8250_bus_ioctl()
671 		efr = uart_getreg(bas, REG_EFR);  in ns8250_bus_ioctl()
676 		uart_setreg(bas, REG_EFR, efr);  in ns8250_bus_ioctl()
677 		uart_barrier(bas);  in ns8250_bus_ioctl()
678 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
679 		uart_barrier(bas);  in ns8250_bus_ioctl()
682 		lcr = uart_getreg(bas, REG_LCR);  in ns8250_bus_ioctl()
683 		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);  in ns8250_bus_ioctl()
684 		uart_barrier(bas);  in ns8250_bus_ioctl()
685 		divisor = uart_getreg(bas, REG_DLL) |  in ns8250_bus_ioctl()
686 		    (uart_getreg(bas, REG_DLH) << 8);  in ns8250_bus_ioctl()
687 		uart_barrier(bas);  in ns8250_bus_ioctl()
688 		uart_setreg(bas, REG_LCR, lcr);  in ns8250_bus_ioctl()
689 		uart_barrier(bas);  in ns8250_bus_ioctl()
690 		baudrate = (divisor > 0) ? bas->rclk / divisor / 16 : 0;  in ns8250_bus_ioctl()
707 	struct uart_bas *bas;  in ns8250_bus_ipend()  local
713 	bas = &sc->sc_bas;  in ns8250_bus_ipend()
715 	iir = uart_getreg(bas, REG_IIR);  in ns8250_bus_ipend()
718 		(void)uart_getreg(bas, DW_REG_USR);  in ns8250_bus_ipend()
728 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_ipend()
738 			uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ipend()
739 			uart_barrier(bas);  in ns8250_bus_ipend()
744 		ns8250_clrint(bas);  in ns8250_bus_ipend()
754 	struct uart_bas *bas;  in ns8250_bus_param()  local
758 	bas = &sc->sc_bas;  in ns8250_bus_param()
771 		while (((uart_getreg(bas, DW_REG_USR) & USR_BUSY) != 0) &&  in ns8250_bus_param()
782 	error = ns8250_param(bas, baudrate, databits, stopbits, parity);  in ns8250_bus_param()
791 	struct uart_bas *bas;  in ns8250_bus_probe()  local
797 	bas = &sc->sc_bas;  in ns8250_bus_probe()
799 	error = ns8250_probe(bas);  in ns8250_bus_probe()
806 		ns8250_init(bas, 115200, 8, 1, UART_PARITY_NONE);  in ns8250_bus_probe()
810 	error = ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
820 	uart_setreg(bas, REG_MCR, MCR_LOOPBACK | MCR_IE | MCR_DTR | MCR_RTS);  in ns8250_bus_probe()
821 	uart_barrier(bas);  in ns8250_bus_probe()
832 	uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
833 	uart_barrier(bas);  in ns8250_bus_probe()
834 	if (!(uart_getreg(bas, REG_IIR) & IIR_FIFO_MASK)) {  in ns8250_bus_probe()
839 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
840 		uart_barrier(bas);  in ns8250_bus_probe()
850 	uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
851 	uart_barrier(bas);  in ns8250_bus_probe()
854 	delay = ns8250_delay(bas);  in ns8250_bus_probe()
857 	error = ns8250_drain(bas, UART_DRAIN_RECEIVER|UART_DRAIN_TRANSMITTER);  in ns8250_bus_probe()
859 		uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
864 		uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
865 		uart_barrier(bas);  in ns8250_bus_probe()
877 		uart_setreg(bas, REG_DATA, 0);  in ns8250_bus_probe()
878 		uart_barrier(bas);  in ns8250_bus_probe()
887 		while (((lsr |= uart_getreg(bas, REG_LSR)) & LSR_TEMT) == 0 &&  in ns8250_bus_probe()
891 			ier = uart_getreg(bas, REG_IER) & ns8250->ier_mask;  in ns8250_bus_probe()
892 			uart_setreg(bas, REG_IER, ier);  in ns8250_bus_probe()
893 			uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
898 			uart_setreg(bas, REG_FCR, val);  in ns8250_bus_probe()
899 			uart_barrier(bas);  in ns8250_bus_probe()
906 	uart_setreg(bas, REG_MCR, mcr);  in ns8250_bus_probe()
909 	ns8250_flush(bas, UART_FLUSH_RECEIVER|UART_FLUSH_TRANSMITTER);  in ns8250_bus_probe()
960 	struct uart_bas *bas;  in ns8250_bus_receive()  local
964 	bas = &sc->sc_bas;  in ns8250_bus_receive()
966 	lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
972 		xc = uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
978 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
982 		(void)uart_getreg(bas, REG_DATA);  in ns8250_bus_receive()
983 		uart_barrier(bas);  in ns8250_bus_receive()
984 		lsr = uart_getreg(bas, REG_LSR);  in ns8250_bus_receive()
994 	struct uart_bas *bas;  in ns8250_bus_setsig()  local
997 	bas = &sc->sc_bas;  in ns8250_bus_setsig()
1014 	uart_setreg(bas, REG_MCR, ns8250->mcr);  in ns8250_bus_setsig()
1015 	uart_barrier(bas);  in ns8250_bus_setsig()
1024 	struct uart_bas *bas;  in ns8250_bus_transmit()  local
1027 	bas = &sc->sc_bas;  in ns8250_bus_transmit()
1030 		if ((uart_getreg(bas, REG_LSR) & LSR_TEMT) == 0)  in ns8250_bus_transmit()
1031 			ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_transmit()
1033 		while ((uart_getreg(bas, REG_LSR) & LSR_THRE) == 0)  in ns8250_bus_transmit()
1037 		uart_setreg(bas, REG_DATA, sc->sc_txbuf[i]);  in ns8250_bus_transmit()
1038 		uart_barrier(bas);  in ns8250_bus_transmit()
1040 	uart_setreg(bas, REG_IER, ns8250->ier | IER_ETXRDY);  in ns8250_bus_transmit()
1041 	uart_barrier(bas);  in ns8250_bus_transmit()
1043 		ns8250_drain(bas, UART_DRAIN_TRANSMITTER);  in ns8250_bus_transmit()
1055 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_grab()  local
1065 	ier = uart_getreg(bas, REG_IER);  in ns8250_bus_grab()
1066 	uart_setreg(bas, REG_IER, ier & ns8250->ier_mask);  in ns8250_bus_grab()
1067 	uart_barrier(bas);  in ns8250_bus_grab()
1075 	struct uart_bas *bas = &sc->sc_bas;  in ns8250_bus_ungrab()  local
1081 	uart_setreg(bas, REG_IER, ns8250->ier);  in ns8250_bus_ungrab()
1082 	uart_barrier(bas);  in ns8250_bus_ungrab()