uart_bus_puc.c revision 120452 
1/*-
2 * Copyright (c) 2002 JF Hay.  All rights reserved.
3 * Copyright (c) 2001 M. Warner Losh.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/dev/uart/uart_bus_puc.c 120452 2003-09-26 05:14:56Z marcel $");
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/bus.h>
32#include <sys/conf.h>
33#include <sys/kernel.h>
34#include <sys/module.h>
35#include <machine/bus.h>
36#include <sys/rman.h>
37#include <machine/resource.h>
38
39#include <dev/pci/pcivar.h>
40#include <dev/puc/pucvar.h>
41
42#include <dev/uart/uart.h>
43#include <dev/uart/uart_bus.h>
44
45static int uart_puc_probe(device_t dev);
46
47static device_method_t uart_puc_methods[] = {
48	/* Device interface */
49	DEVMETHOD(device_probe,		uart_puc_probe),
50	DEVMETHOD(device_attach,	uart_bus_attach),
51	DEVMETHOD(device_detach,	uart_bus_detach),
52	{ 0, 0 }
53};
54
55static driver_t uart_puc_driver = {
56	uart_driver_name,
57	uart_puc_methods,
58	sizeof(struct uart_softc),
59};
60
61static int
62uart_puc_probe(device_t dev)
63{
64	device_t parent;
65	struct uart_softc *sc;
66	uintptr_t port, rclk, regshft, type;
67
68	parent = device_get_parent(dev);
69	sc = device_get_softc(dev);
70
71	if (BUS_READ_IVAR(parent, dev, PUC_IVAR_SUBTYPE, &type))
72		return (ENXIO);
73	switch (type) {
74	case PUC_PORT_UART_NS8250:
75		sc->sc_class = &uart_ns8250_class;
76		port = 0;
77		break;
78	case PUC_PORT_UART_SAB82532:
79		sc->sc_class = &uart_sab82532_class;
80		if (BUS_READ_IVAR(parent, dev, PUC_IVAR_PORT, &port))
81			port = 0;
82		break;
83	case PUC_PORT_UART_Z8530:
84		sc->sc_class = &uart_z8530_class;
85		if (BUS_READ_IVAR(parent, dev, PUC_IVAR_PORT, &port))
86			port = 0;
87		break;
88	default:
89		return (ENXIO);
90	}
91
92	if (BUS_READ_IVAR(parent, dev, PUC_IVAR_FREQ, &rclk))
93		rclk = 0;
94	if (BUS_READ_IVAR(parent, dev, PUC_IVAR_REGSHFT, &regshft))
95		regshft = 0;
96	return (uart_bus_probe(dev, regshft, rclk, 0, port));
97}
98
99DRIVER_MODULE(uart, puc, uart_puc_driver, uart_devclass, 0, 0);
100