1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
45 #include <dev/uart/uart.h>
46 #include <dev/uart/uart_bus.h>
47 #include <dev/uart/uart_cpu.h>
71 	uart,
77 /* TTY swi(9) event. Allows all uart soft handlers to share one ithread. */
84 	cp->cn_pri = CN_DEAD;  in uart_cnprobe()
94 	strlcpy(cp->cn_name, uart_driver_name, sizeof(cp->cn_name));  in uart_cnprobe()
95 	cp->cn_pri = (boothowto & RB_SERIAL) ? CN_REMOTE : CN_NORMAL;  in uart_cnprobe()
96 	cp->cn_arg = &uart_console;  in uart_cnprobe()
106 	 * single- or multi-user. The problem is that we don't know at  in uart_cninit()
113 	di = cp->cn_arg;  in uart_cninit()
114 	KASSERT(di->cookie == NULL, ("foo"));  in uart_cninit()
115 	di->cookie = cp;  in uart_cninit()
116 	di->type = UART_DEV_CONSOLE;  in uart_cninit()
125 	uart_init(cp->cn_arg);  in uart_cnresume()
132 	uart_term(cp->cn_arg);  in uart_cnterm()
139 	uart_grab(cp->cn_arg);  in uart_cngrab()
146 	uart_ungrab(cp->cn_arg);  in uart_cnungrab()
153 	uart_putc(cp->cn_arg, c);  in uart_cnputc()
160 	return (uart_poll(cp->cn_arg));  in uart_cngetc()
170 	if (sc == NULL || sc->sc_leaving)  in uart_tty_open()
173 	sc->sc_opened = 1;  in uart_tty_open()
183 	if (sc == NULL || sc->sc_leaving || !sc->sc_opened)  in uart_tty_close()
186 	if (sc->sc_hwiflow)  in uart_tty_close()
188 	if (sc->sc_hwoflow)  in uart_tty_close()
190 	if (sc->sc_sysdev == NULL)  in uart_tty_close()
194 	sc->sc_opened = 0;  in uart_tty_close()
203 	if (sc == NULL || sc->sc_leaving)  in uart_tty_outwakeup()
206 	if (sc->sc_txbusy)  in uart_tty_outwakeup()
213 	if ((tp->t_termios.c_cflag & CCTS_OFLOW) && !sc->sc_hwoflow &&  in uart_tty_outwakeup()
214 	    !(sc->sc_hwsig & SER_CTS))  in uart_tty_outwakeup()
217 	sc->sc_txdatasz = ttydisc_getc(tp, sc->sc_txbuf, sc->sc_txfifosz);  in uart_tty_outwakeup()
218 	if (sc->sc_txdatasz != 0)  in uart_tty_outwakeup()
228 	if (sc == NULL || sc->sc_leaving)  in uart_tty_inwakeup()
231 	if (sc->sc_isquelch) {  in uart_tty_inwakeup()
232 		if ((tp->t_termios.c_cflag & CRTS_IFLOW) && !sc->sc_hwiflow)  in uart_tty_inwakeup()
234 		sc->sc_isquelch = 0;  in uart_tty_inwakeup()
255 		return pps_ioctl(cmd, data, &sc->sc_pps);  in uart_tty_ioctl()
266 	if (sc == NULL || sc->sc_leaving)  in uart_tty_param()
268 	if (t->c_ispeed != t->c_ospeed && t->c_ospeed != 0)  in uart_tty_param()
270 	if (t->c_ospeed == 0) {  in uart_tty_param()
274 	switch (t->c_cflag & CSIZE) {  in uart_tty_param()
280 	stopbits = (t->c_cflag & CSTOPB) ? 2 : 1;  in uart_tty_param()
281 	if (t->c_cflag & PARENB)  in uart_tty_param()
282 		parity = (t->c_cflag & PARODD) ? UART_PARITY_ODD :  in uart_tty_param()
286 	if (UART_PARAM(sc, t->c_ospeed, databits, stopbits, parity) != 0)  in uart_tty_param()
288 	if ((t->c_cflag & CNO_RTSDTR) == 0)  in uart_tty_param()
290 	/* Set input flow control state. */  in uart_tty_param()
291 	if (!sc->sc_hwiflow) {  in uart_tty_param()
292 		if ((t->c_cflag & CRTS_IFLOW) && sc->sc_isquelch)  in uart_tty_param()
295 			if ((t->c_cflag & CNO_RTSDTR) == 0)  in uart_tty_param()
299 		UART_IOCTL(sc, UART_IOCTL_IFLOW, (t->c_cflag & CRTS_IFLOW));  in uart_tty_param()
300 	/* Set output flow control state. */  in uart_tty_param()
301 	if (sc->sc_hwoflow)  in uart_tty_param()
302 		UART_IOCTL(sc, UART_IOCTL_OFLOW, (t->c_cflag & CCTS_OFLOW));  in uart_tty_param()
315 	return (sc->sc_hwsig);  in uart_tty_modem()
325 	if (sc->sc_leaving)  in uart_tty_intr()
328 	pend = atomic_readandclear_32(&sc->sc_ttypend);  in uart_tty_intr()
332 	tp = sc->sc_u.u_tty.tp;  in uart_tty_intr()
336 		while (!uart_rx_empty(sc) && !sc->sc_isquelch) {  in uart_tty_intr()
346 				sc->sc_isquelch = 1;  in uart_tty_intr()
347 				if ((tp->t_termios.c_cflag & CRTS_IFLOW) &&  in uart_tty_intr()
348 				    !sc->sc_hwiflow)  in uart_tty_intr()
377 	 * XXX: uart(4) could reuse the device unit number before it is  in uart_tty_free()
390 	if (sc == NULL || sc->sc_leaving)  in uart_tty_busy()
396 	 * which case we will incorrectly but non-fatally report a busy Tx  in uart_tty_busy()
401 	if (sc->sc_txbusy)  in uart_tty_busy()
425 	sc->sc_u.u_tty.tp = tp = tty_alloc(&uart_tty_class, sc);  in uart_tty_attach()
427 	unit = device_get_unit(sc->sc_dev);  in uart_tty_attach()
429 	if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {  in uart_tty_attach()
430 		sprintf(((struct consdev *)sc->sc_sysdev->cookie)->cn_name,  in uart_tty_attach()
432 		tty_init_console(tp, sc->sc_sysdev->baudrate);  in uart_tty_attach()
436 	    INTR_TYPE_TTY, &sc->sc_softih);  in uart_tty_attach()
448 	tp = sc->sc_u.u_tty.tp;  in uart_tty_detach()
451 	swi_remove(sc->sc_softih);  in uart_tty_detach()
461 	if (sc->sc_u.u_tty.tp != NULL)  in uart_tty_getlock()
462 		return (tty_getlock(sc->sc_u.u_tty.tp));  in uart_tty_getlock()