uart_bus_ar71xx.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 */
27#include "opt_uart.h"
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/11/sys/mips/atheros/uart_bus_ar71xx.c 330897 2018-03-14 03:19:51Z eadler $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/bus.h>
35#include <sys/conf.h>
36#include <sys/kernel.h>
37#include <sys/module.h>
38
39#include <machine/bus.h>
40
41#include <dev/uart/uart.h>
42#include <dev/uart/uart_cpu.h>
43#include <dev/uart/uart_bus.h>
44
45#include <mips/atheros/ar71xxreg.h>
46#include <mips/atheros/ar71xx_cpudef.h>
47
48#include "uart_if.h"
49
50static int uart_ar71xx_probe(device_t dev);
51extern struct uart_class uart_ar71xx_uart_class;
52
53static device_method_t uart_ar71xx_methods[] = {
54	/* Device interface */
55	DEVMETHOD(device_probe,		uart_ar71xx_probe),
56	DEVMETHOD(device_attach,	uart_bus_attach),
57	DEVMETHOD(device_detach,	uart_bus_detach),
58	{ 0, 0 }
59};
60
61static driver_t uart_ar71xx_driver = {
62	uart_driver_name,
63	uart_ar71xx_methods,
64	sizeof(struct uart_softc),
65};
66
67extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
68
69static int
70uart_ar71xx_probe(device_t dev)
71{
72	struct uart_softc *sc;
73	uint64_t freq;
74
75	freq = ar71xx_uart_freq();
76
77	sc = device_get_softc(dev);
78	sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
79	sc->sc_class = &uart_ns8250_class;
80	bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
81	sc->sc_sysdev->bas.regshft = 2;
82	sc->sc_sysdev->bas.bst = mips_bus_space_generic;
83	sc->sc_sysdev->bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR) + 3;
84	sc->sc_bas.regshft = 2;
85	sc->sc_bas.bst = mips_bus_space_generic;
86	sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR) + 3;
87
88	return (uart_bus_probe(dev, 2, freq, 0, 0));
89}
90
91DRIVER_MODULE(uart, apb, uart_ar71xx_driver, uart_devclass, 0, 0);
92