Author: sgalabov
Date: Thu Apr 7 11:16:32 2016
New Revision: 297669
URL: https://svnweb.freebsd.org/changeset/base/297669
Log:
Initial import of Ralink/Mediatek MIPS SoC support #4
UART drivers.
- uart_dev_mtk.[ch] are the old-style Mediatek/Ralink-specific UART driver
as also found in sys/mips/rt305x/uart_dev_rt305x.c, with minor improvements
and FDT attachment enabled for the appropriate SoCs.
- uart_dev_mtk_ns8250.c is the new-style ns16550a-compatible UART driver
found in newer Mediatek SoCs. It uses the uart_dev_ns8250.c driver
indirectly and is basically just a wrapper around it and only overrides its
probe method.
The reason I am not using the uart_dev_ns8250.c driver directly is because
I have some code that does UART clock detection before initializing the
UART, so that we don't need to hard-code the UART clock frequency in the
dts files for each board.
Approved by: adrian (mentor)
Sponsored by: Smartcom - Bulgaria AD
Differential Revision: https://reviews.freebsd.org/D5840
Added:
head/sys/mips/mediatek/uart_dev_mtk.c (contents, props changed)
head/sys/mips/mediatek/uart_dev_mtk.h (contents, props changed)
head/sys/mips/mediatek/uart_dev_mtk_ns8250.c (contents, props changed)
Added: head/sys/mips/mediatek/uart_dev_mtk.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/mediatek/uart_dev_mtk.c Thu Apr 7 11:16:32 2016
(r297669)
@@ -0,0 +1,552 @@
+/* $NetBSD: uart.c,v 1.2 2007/03/23 20:05:47 dogcow Exp $ */
+
+/*-
+ * Copyright (c) 2013, Alexander A. Mityaev <san...@adm.ua>
+ * Copyright (c) 2010 Aleksandr Rybalko.
+ * Copyright (c) 2007 Ruslan Ermilov and Vsevolod Lobko.
+ * Copyright (c) 2007 Oleksandr Tymoshenko.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "opt_ddb.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/kdb.h>
+#include <sys/reboot.h>
+#include <sys/sysctl.h>
+#include <sys/kernel.h>
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/uart/uart.h>
+#include <dev/uart/uart_cpu.h>
+#include <dev/uart/uart_cpu_fdt.h>
+#include <dev/uart/uart_bus.h>
+
+#include <mips/mediatek/uart_dev_mtk.h>
+#include <mips/mediatek/mtk_soc.h>
+#include <mips/mediatek/mtk_sysctl.h>
+
+#include "uart_if.h"
+
+/* Set some reference clock value. Real value will be taken from FDT */
+#define DEFAULT_RCLK (120 * 1000 * 1000)
+
+/*
+ * Low-level UART interface.
+ */
+static int mtk_uart_probe(struct uart_bas *bas);
+static void mtk_uart_init(struct uart_bas *bas, int, int, int, int);
+static void mtk_uart_term(struct uart_bas *bas);
+static void mtk_uart_putc(struct uart_bas *bas, int);
+static int mtk_uart_rxready(struct uart_bas *bas);
+static int mtk_uart_getc(struct uart_bas *bas, struct mtx *);
+
+static struct uart_ops uart_mtk_ops = {
+ .probe = mtk_uart_probe,
+ .init = mtk_uart_init,
+ .term = mtk_uart_term,
+ .putc = mtk_uart_putc,
+ .rxready = mtk_uart_rxready,
+ .getc = mtk_uart_getc,
+};
+
+static int uart_output = 1;
+TUNABLE_INT("kern.uart_output", &uart_output);
+SYSCTL_INT(_kern, OID_AUTO, uart_output, CTLFLAG_RW,
+ &uart_output, 0, "UART output enabled.");
+
+static int
+mtk_uart_probe(struct uart_bas *bas)
+{
+ return (0);
+}
+
+static void
+mtk_uart_init(struct uart_bas *bas, int baudrate, int databits,
+ int stopbits, int parity)
+{
+ /* CLKDIV = 384000000/ 3/ 16/ br */
+ /* for 384MHz CLKDIV = 8000000 / baudrate; */
+ switch (databits) {
+ case 5:
+ databits = UART_LCR_5B;
+ break;
+ case 6:
+ databits = UART_LCR_6B;
+ break;
+ case 7:
+ databits = UART_LCR_7B;
+ break;
+ case 8:
+ databits = UART_LCR_8B;
+ break;
+ default:
+ /* Unsupported */
+ return;
+ }
+ switch (parity) {
+ case UART_PARITY_EVEN: parity = (UART_LCR_PEN|UART_LCR_EVEN); break;
+ case UART_PARITY_ODD: parity = (UART_LCR_PEN); break;
+ case UART_PARITY_NONE: parity = 0; break;
+ /* Unsupported */
+ default: return;
+ }
+
+ if (bas->rclk && baudrate) {
+ uart_setreg(bas, UART_CDDL_REG, bas->rclk/16/baudrate);
+ uart_barrier(bas);
+ }
+
+ uart_setreg(bas, UART_LCR_REG, databits |
+ (stopbits==1?0:UART_LCR_STB_15) |
+ parity);
+ uart_barrier(bas);
+}
+
+static void
+mtk_uart_term(struct uart_bas *bas)
+{
+ uart_setreg(bas, UART_MCR_REG, 0);
+ uart_barrier(bas);
+}
+
+static void
+mtk_uart_putc(struct uart_bas *bas, int c)
+{
+ char chr;
+ if (!uart_output) return;
+ chr = c;
+ while (!(uart_getreg(bas, UART_LSR_REG) & UART_LSR_THRE));
+ uart_setreg(bas, UART_TX_REG, c);
+ uart_barrier(bas);
+ while (!(uart_getreg(bas, UART_LSR_REG) & UART_LSR_THRE));
+}
+
+static int
+mtk_uart_rxready(struct uart_bas *bas)
+{
+ if (uart_getreg(bas, UART_LSR_REG) & UART_LSR_DR)
+ return (1);
+ return (0);
+}
+
+static int
+mtk_uart_getc(struct uart_bas *bas, struct mtx *hwmtx)
+{
+ int c;
+
+ uart_lock(hwmtx);
+
+ while (!(uart_getreg(bas, UART_LSR_REG) & UART_LSR_DR)) {
+ uart_unlock(hwmtx);
+ DELAY(10);
+ uart_lock(hwmtx);
+ }
+
+ c = uart_getreg(bas, UART_RX_REG);
+
+ uart_unlock(hwmtx);
+
+ return (c);
+}
+
+/*
+ * High-level UART interface.
+ */
+struct uart_mtk_softc {
+ struct uart_softc base;
+ uint8_t ier_mask;
+ uint8_t ier;
+};
+
+static int mtk_uart_bus_attach(struct uart_softc *);
+static int mtk_uart_bus_detach(struct uart_softc *);
+static int mtk_uart_bus_flush(struct uart_softc *, int);
+static int mtk_uart_bus_getsig(struct uart_softc *);
+static int mtk_uart_bus_ioctl(struct uart_softc *, int, intptr_t);
+static int mtk_uart_bus_ipend(struct uart_softc *);
+static int mtk_uart_bus_param(struct uart_softc *, int, int, int, int);
+static int mtk_uart_bus_probe(struct uart_softc *);
+static int mtk_uart_bus_receive(struct uart_softc *);
+static int mtk_uart_bus_setsig(struct uart_softc *, int);
+static int mtk_uart_bus_transmit(struct uart_softc *);
+static void mtk_uart_bus_grab(struct uart_softc *);
+static void mtk_uart_bus_ungrab(struct uart_softc *);
+
+static kobj_method_t uart_mtk_methods[] = {
+ KOBJMETHOD(uart_attach, mtk_uart_bus_attach),
+ KOBJMETHOD(uart_detach, mtk_uart_bus_detach),
+ KOBJMETHOD(uart_flush, mtk_uart_bus_flush),
+ KOBJMETHOD(uart_getsig, mtk_uart_bus_getsig),
+ KOBJMETHOD(uart_ioctl, mtk_uart_bus_ioctl),
+ KOBJMETHOD(uart_ipend, mtk_uart_bus_ipend),
+ KOBJMETHOD(uart_param, mtk_uart_bus_param),
+ KOBJMETHOD(uart_probe, mtk_uart_bus_probe),
+ KOBJMETHOD(uart_receive, mtk_uart_bus_receive),
+ KOBJMETHOD(uart_setsig, mtk_uart_bus_setsig),
+ KOBJMETHOD(uart_transmit, mtk_uart_bus_transmit),
+ KOBJMETHOD(uart_grab, mtk_uart_bus_grab),
+ KOBJMETHOD(uart_ungrab, mtk_uart_bus_ungrab),
+ { 0, 0 }
+};
+
+struct uart_class uart_mtk_class = {
+ "uart_mtk",
+ uart_mtk_methods,
+ sizeof(struct uart_mtk_softc),
+ .uc_ops = &uart_mtk_ops,
+ .uc_range = 1, /* use hinted range */
+ .uc_rclk = 0
+};
+
+static struct ofw_compat_data compat_data[] = {
+ { "ralink,rt2880-uart", (uintptr_t)&uart_mtk_class },
+ { "ralink,rt3050-uart", (uintptr_t)&uart_mtk_class },
+ { "ralink,rt3352-uart", (uintptr_t)&uart_mtk_class },
+ { "ralink,rt3883-uart", (uintptr_t)&uart_mtk_class },
+ { "ralink,rt5350-uart", (uintptr_t)&uart_mtk_class },
+ { "ralink,mt7620a-uart", (uintptr_t)&uart_mtk_class },
+ { NULL, (uintptr_t)NULL },
+};
+UART_FDT_CLASS_AND_DEVICE(compat_data);
+
+
+#define SIGCHG(c, i, s, d) \
+ if (c) { \
+ i |= (i & s) ? s : s | d; \
+ } else { \
+ i = (i & s) ? (i & ~s) | d : i; \
+ }
+
+/*
+ * Disable TX interrupt. uart should be locked
+ */
+static __inline void
+mtk_uart_disable_txintr(struct uart_softc *sc)
+{
+ struct uart_bas *bas = &sc->sc_bas;
+ uint8_t cr;
+
+ cr = uart_getreg(bas, UART_IER_REG);
+ cr &= ~UART_IER_ETBEI;
+ uart_setreg(bas, UART_IER_REG, cr);
+ uart_barrier(bas);
+}
+
+/*
+ * Enable TX interrupt. uart should be locked
+ */
+static __inline void
+mtk_uart_enable_txintr(struct uart_softc *sc)
+{
+ struct uart_bas *bas = &sc->sc_bas;
+ uint8_t cr;
+
+ cr = uart_getreg(bas, UART_IER_REG);
+ cr |= UART_IER_ETBEI;
+ uart_setreg(bas, UART_IER_REG, cr);
+ uart_barrier(bas);
+}
+
+static int
+mtk_uart_bus_attach(struct uart_softc *sc)
+{
+ struct uart_bas *bas;
+ struct uart_devinfo *di;
+ struct uart_mtk_softc *usc = (struct uart_mtk_softc *)sc;
+
+ bas = &sc->sc_bas;
+
+ if (!bas->rclk) {
+ bas->rclk = mtk_soc_get_uartclk();
+ }
+
+ if (sc->sc_sysdev != NULL) {
+ di = sc->sc_sysdev;
+ mtk_uart_init(bas, di->baudrate, di->databits, di->stopbits,
+ di->parity);
+ } else {
+ mtk_uart_init(bas, 57600, 8, 1, 0);
+ }
+
+ sc->sc_rxfifosz = 16;
+ sc->sc_txfifosz = 16;
+
+ (void)mtk_uart_bus_getsig(sc);
+
+ /* Enable FIFO */
+ uart_setreg(bas, UART_FCR_REG,
+ uart_getreg(bas, UART_FCR_REG) |
+ UART_FCR_FIFOEN | UART_FCR_TXTGR_1 | UART_FCR_RXTGR_1);
+ uart_barrier(bas);
+ /* Enable interrupts */
+ usc->ier_mask = 0xf0;
+ uart_setreg(bas, UART_IER_REG,
+ UART_IER_EDSSI | UART_IER_ELSI | UART_IER_ERBFI);
+ uart_barrier(bas);
+
+ return (0);
+}
+
+static int
+mtk_uart_bus_detach(struct uart_softc *sc)
+{
+ return (0);
+}
+
+static int
+mtk_uart_bus_flush(struct uart_softc *sc, int what)
+{
+ struct uart_bas *bas = &sc->sc_bas;
+ uint32_t fcr = uart_getreg(bas, UART_FCR_REG);
+
+ if (what & UART_FLUSH_TRANSMITTER) {
+ uart_setreg(bas, UART_FCR_REG, fcr|UART_FCR_TXRST);
+ uart_barrier(bas);
+ }
+ if (what & UART_FLUSH_RECEIVER) {
+ uart_setreg(bas, UART_FCR_REG, fcr|UART_FCR_RXRST);
+ uart_barrier(bas);
+ }
+ uart_setreg(bas, UART_FCR_REG, fcr);
+ uart_barrier(bas);
+ return (0);
+}
+
+static int
+mtk_uart_bus_getsig(struct uart_softc *sc)
+{
+ uint32_t new, old, sig;
+ uint8_t bes;
+
+ return(0);
+ do {
+ old = sc->sc_hwsig;
+ sig = old;
+ uart_lock(sc->sc_hwmtx);
+ bes = uart_getreg(&sc->sc_bas, UART_MSR_REG);
+ uart_unlock(sc->sc_hwmtx);
+ /* XXX: chip can show delta */
+ SIGCHG(bes & UART_MSR_CTS, sig, SER_CTS, SER_DCTS);
+ SIGCHG(bes & UART_MSR_DCD, sig, SER_DCD, SER_DDCD);
+ SIGCHG(bes & UART_MSR_DSR, sig, SER_DSR, SER_DDSR);
+ new = sig & ~SER_MASK_DELTA;
+ } while (!atomic_cmpset_32(&sc->sc_hwsig, old, new));
+
+ return (sig);
+}
+
+static int
+mtk_uart_bus_ioctl(struct uart_softc *sc, int request, intptr_t data)
+{
+ struct uart_bas *bas;
+ int baudrate, divisor, error;
+
+ bas = &sc->sc_bas;
+ error = 0;
+ uart_lock(sc->sc_hwmtx);
+ switch (request) {
+ case UART_IOCTL_BREAK:
+ /* TODO: Send BREAK */
+ break;
+ case UART_IOCTL_BAUD:
+ divisor = uart_getreg(bas, UART_CDDL_REG);
+ baudrate = bas->rclk / (divisor * 16);
+ *(int*)data = baudrate;
+ break;
+ default:
+ error = EINVAL;
+ break;
+ }
+ uart_unlock(sc->sc_hwmtx);
+ return (error);
+}
+
+static int
+mtk_uart_bus_ipend(struct uart_softc *sc)
+{
+ struct uart_bas *bas;
+ int ipend;
+ uint8_t iir, lsr, msr;
+
+// breakpoint();
+
+ bas = &sc->sc_bas;
+ ipend = 0;
+
+ uart_lock(sc->sc_hwmtx);
+ iir = uart_getreg(&sc->sc_bas, UART_IIR_REG);
+ lsr = uart_getreg(&sc->sc_bas, UART_LSR_REG);
+ uart_setreg(&sc->sc_bas, UART_LSR_REG, lsr);
+ msr = uart_getreg(&sc->sc_bas, UART_MSR_REG);
+ uart_setreg(&sc->sc_bas, UART_MSR_REG, msr);
+ if (iir & UART_IIR_INTP) {
+ uart_unlock(sc->sc_hwmtx);
+ return (0);
+ }
+ switch ((iir >> 1) & 0x07) {
+ case UART_IIR_ID_THRE:
+ ipend |= SER_INT_TXIDLE;
+ break;
+ case UART_IIR_ID_DR2:
+ mtk_uart_bus_flush(sc, UART_FLUSH_RECEIVER);
+ /* passthrough */
+ case UART_IIR_ID_DR:
+ ipend |= SER_INT_RXREADY;
+ break;
+ case UART_IIR_ID_MST:
+ case UART_IIR_ID_LINESTATUS:
+ ipend |= SER_INT_SIGCHG;
+ if (lsr & UART_LSR_BI)
+ ipend |= SER_INT_BREAK;
+ if (lsr & UART_LSR_OE)
+ ipend |= SER_INT_OVERRUN;
+ break;
+ default:
+ /* XXX: maybe return error here */
+ break;
+ }
+
+ uart_unlock(sc->sc_hwmtx);
+
+ return (ipend);
+}
+
+static int
+mtk_uart_bus_param(struct uart_softc *sc, int baudrate, int databits,
+ int stopbits, int parity)
+{
+ uart_lock(sc->sc_hwmtx);
+ mtk_uart_init(&sc->sc_bas, baudrate, databits, stopbits, parity);
+ uart_unlock(sc->sc_hwmtx);
+ return (0);
+}
+
+static int
+mtk_uart_bus_probe(struct uart_softc *sc)
+{
+ int error;
+
+ error = mtk_uart_probe(&sc->sc_bas);
+ if (error)
+ return (error);
+
+ device_set_desc(sc->sc_dev, "MTK UART Controller");
+
+ return (0);
+}
+
+static int
+mtk_uart_bus_receive(struct uart_softc *sc)
+{
+ struct uart_bas *bas;
+ int xc;
+ uint8_t lsr;
+
+ bas = &sc->sc_bas;
+ uart_lock(sc->sc_hwmtx);
+ lsr = uart_getreg(bas, UART_LSR_REG);
+ while ((lsr & UART_LSR_DR)) {
+ if (uart_rx_full(sc)) {
+ sc->sc_rxbuf[sc->sc_rxput] = UART_STAT_OVERRUN;
+ break;
+ }
+ xc = 0;
+ xc = uart_getreg(bas, UART_RX_REG);
+ if (lsr & UART_LSR_FE)
+ xc |= UART_STAT_FRAMERR;
+ if (lsr & UART_LSR_PE)
+ xc |= UART_STAT_PARERR;
+ if (lsr & UART_LSR_OE)
+ xc |= UART_STAT_OVERRUN;
+ uart_barrier(bas);
+ uart_rx_put(sc, xc);
+ lsr = uart_getreg(bas, UART_LSR_REG);
+ }
+
+ uart_unlock(sc->sc_hwmtx);
+ return (0);
+}
+
+static int
+mtk_uart_bus_setsig(struct uart_softc *sc, int sig)
+{
+ /* TODO: implement (?) */
+ return (sig);
+}
+
+static int
+mtk_uart_bus_transmit(struct uart_softc *sc)
+{
+ struct uart_bas *bas = &sc->sc_bas;
+ int i;
+
+ if (!uart_output) return (0);
+
+ bas = &sc->sc_bas;
+ uart_lock(sc->sc_hwmtx);
+ while ((uart_getreg(bas, UART_LSR_REG) & UART_LSR_THRE) == 0);
+ mtk_uart_enable_txintr(sc);
+ for (i = 0; i < sc->sc_txdatasz; i++) {
+ uart_setreg(bas, UART_TX_REG, sc->sc_txbuf[i]);
+ uart_barrier(bas);
+ }
+ sc->sc_txbusy = 1;
+ uart_unlock(sc->sc_hwmtx);
+ return (0);
+}
+
+void
+mtk_uart_bus_grab(struct uart_softc *sc)
+{
+ struct uart_bas *bas = &sc->sc_bas;
+ struct uart_mtk_softc *usc = (struct uart_mtk_softc *)sc;
+
+ uart_lock(sc->sc_hwmtx);
+ usc->ier = uart_getreg(bas, UART_IER_REG);
+ uart_setreg(bas, UART_IER_REG, usc->ier & usc->ier_mask);
+ uart_barrier(bas);
+ uart_unlock(sc->sc_hwmtx);
+}
+
+void
+mtk_uart_bus_ungrab(struct uart_softc *sc)
+{
+ struct uart_mtk_softc *usc = (struct uart_mtk_softc *)sc;
+ struct uart_bas *bas = &sc->sc_bas;
+
+ uart_lock(sc->sc_hwmtx);
+ uart_setreg(bas, UART_IER_REG, usc->ier);
+ uart_barrier(bas);
+ uart_unlock(sc->sc_hwmtx);
+}
Added: head/sys/mips/mediatek/uart_dev_mtk.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/mediatek/uart_dev_mtk.h Thu Apr 7 11:16:32 2016
(r297669)
@@ -0,0 +1,126 @@
+/*-
+ * Copyright (c) 2010 Aleksandr Rybalko.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * 3. The names of the authors may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#ifndef _MTKUART_H
+#define _MTKUART_H
+
+#undef uart_getreg
+#undef uart_setreg
+#define uart_getreg(bas, reg) \
+ bus_space_read_4((bas)->bst, (bas)->bsh, reg)
+#define uart_setreg(bas, reg, value) \
+ bus_space_write_4((bas)->bst, (bas)->bsh, reg, value)
+
+/* UART registers */
+#define UART_RX_REG 0x00
+#define UART_TX_REG 0x04
+
+#define UART_IER_REG 0x08
+#define UART_IER_EDSSI (1<<3) /* Only full UART */
+#define UART_IER_ELSI (1<<2)
+#define UART_IER_ETBEI (1<<1)
+#define UART_IER_ERBFI (1<<0)
+
+#define UART_IIR_REG 0x0c
+#define UART_IIR_RXFIFO (1<<7)
+#define UART_IIR_TXFIFO (1<<6)
+#define UART_IIR_ID_MST 0
+#define UART_IIR_ID_THRE 1
+#define UART_IIR_ID_DR 2
+#define UART_IIR_ID_LINESTATUS 3
+#define UART_IIR_ID_DR2 6
+#define UART_IIR_ID_SHIFT 1
+#define UART_IIR_ID_MASK 0x0000000e
+#define UART_IIR_INTP (1<<0)
+
+#define UART_FCR_REG 0x10
+#define UART_FCR_RXTGR_1 (0<<6)
+#define UART_FCR_RXTGR_4 (1<<6)
+#define UART_FCR_RXTGR_8 (2<<6)
+#define UART_FCR_RXTGR_12 (3<<6)
+#define UART_FCR_TXTGR_1 (0<<4)
+#define UART_FCR_TXTGR_4 (1<<4)
+#define UART_FCR_TXTGR_8 (2<<4)
+#define UART_FCR_TXTGR_12 (3<<4)
+#define UART_FCR_DMA (1<<3)
+#define UART_FCR_TXRST (1<<2)
+#define UART_FCR_RXRST (1<<1)
+#define UART_FCR_FIFOEN (1<<0)
+
+#define UART_LCR_REG 0x14
+#define UART_LCR_DLAB (1<<7)
+#define UART_LCR_BRK (1<<6)
+#define UART_LCR_FPAR (1<<5)
+#define UART_LCR_EVEN (1<<4)
+#define UART_LCR_PEN (1<<3)
+#define UART_LCR_STB_15 (1<<2)
+#define UART_LCR_5B 0
+#define UART_LCR_6B 1
+#define UART_LCR_7B 2
+#define UART_LCR_8B 3
+
+#define UART_MCR_REG 0x18
+#define UART_MCR_LOOP (1<<4)
+#define UART_MCR_OUT2_L (1<<3) /* Only full UART */
+#define UART_MCR_OUT1_L (1<<2) /* Only full UART */
+#define UART_MCR_RTS_L (1<<1) /* Only full UART */
+#define UART_MCR_DTR_L (1<<0) /* Only full UART */
+
+#define UART_LSR_REG 0x1c
+#define UART_LSR_ERINF (1<<7)
+#define UART_LSR_TEMT (1<<6)
+#define UART_LSR_THRE (1<<5)
+#define UART_LSR_BI (1<<4)
+#define UART_LSR_FE (1<<3)
+#define UART_LSR_PE (1<<2)
+#define UART_LSR_OE (1<<1)
+#define UART_LSR_DR (1<<0)
+
+#define UART_MSR_REG 0x20 /* Only full UART */
+#define UART_MSR_DCD (1<<7) /* Only full UART */
+#define UART_MSR_RI (1<<6) /* Only full UART */
+#define UART_MSR_DSR (1<<5) /* Only full UART */
+#define UART_MSR_CTS (1<<4) /* Only full UART */
+#define UART_MSR_DDCD (1<<3) /* Only full UART */
+#define UART_MSR_TERI (1<<2) /* Only full UART */
+#define UART_MSR_DDSR (1<<1) /* Only full UART */
+#define UART_MSR_DCTS (1<<0) /* Only full UART */
+
+#define UART_CDDL_REG 0x28
+#define UART_CDDLL_REG 0x2c
+#define UART_CDDLH_REG 0x30
+
+#define UART_IFCTL_REG 0x34
+#define UART_IFCTL_IFCTL (1<<0)
+
+int uart_cnattach(void);
+#endif /* _MTKUART_H */
Added: head/sys/mips/mediatek/uart_dev_mtk_ns8250.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/mediatek/uart_dev_mtk_ns8250.c Thu Apr 7 11:16:32
2016 (r297669)
@@ -0,0 +1,113 @@
+/*-
+ * Copyright (c) 2013 Ian Lepore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "opt_platform.h"
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+#include <machine/bus.h>
+
+#include <mips/mediatek/mtk_soc.h>
+#include <mips/mediatek/mtk_sysctl.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/uart/uart.h>
+#include <dev/uart/uart_cpu.h>
+#include <dev/uart/uart_cpu_fdt.h>
+#include <dev/uart/uart_bus.h>
+#include <dev/uart/uart_dev_ns8250.h>
+
+#include "uart_if.h"
+
+/*
+ * High-level UART interface.
+ */
+static struct uart_class uart_mtk_ns8250_class;
+static int mtk_ns8250_bus_probe(struct uart_softc *);
+
+static kobj_method_t mtk_ns8250_methods[] = {
+ KOBJMETHOD(uart_probe, mtk_ns8250_bus_probe),
+
+ KOBJMETHOD(uart_attach, ns8250_bus_attach),
+ KOBJMETHOD(uart_detach, ns8250_bus_detach),
+ KOBJMETHOD(uart_flush, ns8250_bus_flush),
+ KOBJMETHOD(uart_getsig, ns8250_bus_getsig),
+ KOBJMETHOD(uart_ioctl, ns8250_bus_ioctl),
+ KOBJMETHOD(uart_ipend, ns8250_bus_ipend),
+ KOBJMETHOD(uart_param, ns8250_bus_param),
+ KOBJMETHOD(uart_receive, ns8250_bus_receive),
+ KOBJMETHOD(uart_setsig, ns8250_bus_setsig),
+ KOBJMETHOD(uart_transmit, ns8250_bus_transmit),
+ KOBJMETHOD_END
+};
+
+static struct uart_class uart_mtk_ns8250_class = {
+ "mtk8250",
+ mtk_ns8250_methods,
+ sizeof(struct ns8250_softc),
+ .uc_ops = &uart_ns8250_ops,
+ .uc_range = 1, /* use hinted range */
+ .uc_rclk = 0,
+ .uc_rshift = 2
+};
+
+static struct ofw_compat_data compat_data[] = {
+ { "mtk,ns16550a", (uintptr_t)&uart_mtk_ns8250_class },
+ { "ns16550a", (uintptr_t)&uart_mtk_ns8250_class },
+ { NULL, (uintptr_t)NULL },
+};
+UART_FDT_CLASS_AND_DEVICE(compat_data);
+
+static int
+mtk_ns8250_bus_probe(struct uart_softc *sc)
+{
+ int status;
+
+ if (!ofw_bus_status_okay(sc->sc_dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(sc->sc_dev, compat_data)->ocd_data ==
+ (uintptr_t)NULL)
+ return (ENXIO);
+
+ sc->sc_bas.rclk = mtk_soc_get_uartclk();
+
+ status = ns8250_bus_probe(sc);
+ if (status == 0)
+ device_set_desc(sc->sc_dev, "MTK UART Controller (ns16550a)");
+
+ return (status);
+}
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