1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
145  * FIXME: actual register size is SoC-dependent, we need to handle it
148 	bus_space_read_4((bas)->bst, (bas)->bsh, uart_regofs(bas, reg))
150 	bus_space_write_4((bas)->bst, (bas)->bsh, uart_regofs(bas, reg), value)
153  * Low-level UART interface.
220 	if (bas->rclk != 0 && baudrate != 0) {  in uart_pl011_param()
221 		baud = bas->rclk * 4 / baudrate;  in uart_pl011_param()
236 	 * Loader tells us to infer the rclk when it sets xo to 0 in  in uart_pl011_param()
238 	 * baudrate was set by the firmware, so calculate rclk from baudrate and  in uart_pl011_param()
240 	 * will have us fall back to other rclk methods. This method should be  in uart_pl011_param()
244 	if (bas->rclk == 0 && baudrate > 0 && bas->rclk_guess) {  in uart_pl011_param()
249 		bas->rclk = (div * baudrate) / 4;  in uart_pl011_param()
314  * High-level UART interface.
388 	bas = &sc->sc_bas;  in uart_pl011_bus_attach()
391 	psc->imsc = (UART_RXREADY | RIS_RTIM | UART_TXEMPTY);  in uart_pl011_bus_attach()
392 	__uart_setreg(bas, UART_IMSC, psc->imsc);  in uart_pl011_bus_attach()
427 	uart_lock(sc->sc_hwmtx);  in uart_pl011_bus_ioctl()
438 	uart_unlock(sc->sc_hwmtx);  in uart_pl011_bus_ioctl()
452 	bas = &sc->sc_bas;  in uart_pl011_bus_ipend()
454 	uart_lock(sc->sc_hwmtx);  in uart_pl011_bus_ipend()
465 		if (sc->sc_txbusy)  in uart_pl011_bus_ipend()
469 		__uart_setreg(bas, UART_IMSC, psc->imsc & ~UART_TXEMPTY);  in uart_pl011_bus_ipend()
472 	uart_unlock(sc->sc_hwmtx);  in uart_pl011_bus_ipend()
482 	uart_lock(sc->sc_hwmtx);  in uart_pl011_bus_param()
483 	uart_pl011_param(&sc->sc_bas, baudrate, databits, stopbits, parity);  in uart_pl011_bus_param()
484 	uart_unlock(sc->sc_hwmtx);  in uart_pl011_bus_param()
501 	 * FIFOs.  We check for both the old freebsd-historic and the proper  in uart_pl011_bus_hwrev_fdt()
502 	 * bindings-defined compatible strings for bcm2835, and also check the  in uart_pl011_bus_hwrev_fdt()
506 	if (ofw_bus_is_compatible(sc->sc_dev, "brcm,bcm2835-pl011") ||  in uart_pl011_bus_hwrev_fdt()
507 	    ofw_bus_is_compatible(sc->sc_dev, "broadcom,bcm2835-uart")) {  in uart_pl011_bus_hwrev_fdt()
510 		node = ofw_bus_get_node(sc->sc_dev);  in uart_pl011_bus_hwrev_fdt()
511 		if (OF_getencprop(node, "arm,primecell-periphid", &periphid,  in uart_pl011_bus_hwrev_fdt()
517 	return (-1);  in uart_pl011_bus_hwrev_fdt()
526 	hwrev = -1;  in uart_pl011_bus_probe()
532 		hwrev = __uart_getreg(&sc->sc_bas, UART_PIDREG_2) >> 4;  in uart_pl011_bus_probe()
535 		sc->sc_rxfifosz = FIFO_RX_SIZE_R2;  in uart_pl011_bus_probe()
536 		sc->sc_txfifosz = FIFO_TX_SIZE_R2;  in uart_pl011_bus_probe()
538 		sc->sc_rxfifosz = FIFO_RX_SIZE_R3;  in uart_pl011_bus_probe()
539 		sc->sc_txfifosz = FIFO_TX_SIZE_R3;  in uart_pl011_bus_probe()
542 	device_set_desc(sc->sc_dev, "PrimeCell UART (PL011)");  in uart_pl011_bus_probe()
554 	bas = &sc->sc_bas;  in uart_pl011_bus_receive()
555 	uart_lock(sc->sc_hwmtx);  in uart_pl011_bus_receive()
562 			sc->sc_rxbuf[sc->sc_rxput] = UART_STAT_OVERRUN;  in uart_pl011_bus_receive()
577 	uart_unlock(sc->sc_hwmtx);  in uart_pl011_bus_receive()
597 	bas = &sc->sc_bas;  in uart_pl011_bus_transmit()
598 	uart_lock(sc->sc_hwmtx);  in uart_pl011_bus_transmit()
600 	for (i = 0; i < sc->sc_txdatasz; i++) {  in uart_pl011_bus_transmit()
601 		__uart_setreg(bas, UART_DR, sc->sc_txbuf[i]);  in uart_pl011_bus_transmit()
606 	sc->sc_txbusy = 1;  in uart_pl011_bus_transmit()
607 	__uart_setreg(bas, UART_IMSC, psc->imsc);  in uart_pl011_bus_transmit()
609 	uart_unlock(sc->sc_hwmtx);  in uart_pl011_bus_transmit()
621 	bas = &sc->sc_bas;  in uart_pl011_bus_grab()
624 	uart_lock(sc->sc_hwmtx);  in uart_pl011_bus_grab()
625 	__uart_setreg(bas, UART_IMSC, psc->imsc & ~IMSC_MASK_ALL);  in uart_pl011_bus_grab()
626 	uart_unlock(sc->sc_hwmtx);  in uart_pl011_bus_grab()
636 	bas = &sc->sc_bas;  in uart_pl011_bus_ungrab()
639 	uart_lock(sc->sc_hwmtx);  in uart_pl011_bus_ungrab()
640 	__uart_setreg(bas, UART_IMSC, psc->imsc);  in uart_pl011_bus_ungrab()
641 	uart_unlock(sc->sc_hwmtx);  in uart_pl011_bus_ungrab()