1/*	$NetBSD: gemini_com.c,v 1.4 2018/12/08 17:46:09 thorpej Exp $	*/
2
3/* adapted from:
4 *	NetBSD: omap_com.c,v 1.2 2008/03/14 15:09:09 cube Exp
5 */
6
7/*
8 * Based on arch/arm/xscale/pxa2x0_com.c
9 *
10 * Copyright 2003 Wasabi Systems, Inc.
11 * All rights reserved.
12 *
13 * Written by Steve C. Woodford for Wasabi Systems, Inc.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 *    notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 *    notice, this list of conditions and the following disclaimer in the
22 *    documentation and/or other materials provided with the distribution.
23 * 3. All advertising materials mentioning features or use of this software
24 *    must display the following acknowledgement:
25 *      This product includes software developed for the NetBSD Project by
26 *      Wasabi Systems, Inc.
27 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
28 *    or promote products derived from this software without specific prior
29 *    written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
33 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
34 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
35 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
36 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
37 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
38 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
39 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGE.
42 */
43
44#include <sys/cdefs.h>
45__KERNEL_RCSID(0, "$NetBSD: gemini_com.c,v 1.4 2018/12/08 17:46:09 thorpej Exp $");
46
47#include "opt_com.h"
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/device.h>
52#include <sys/termios.h>
53
54#include <machine/intr.h>
55#include <sys/bus.h>
56
57#include <arm/pic/picvar.h>
58
59#include <dev/ic/comreg.h>
60#include <dev/ic/comvar.h>
61
62#include <arm/gemini/gemini_reg.h>
63#include <arm/gemini/gemini_obiovar.h>
64
65#include <arm/gemini/gemini_com.h>
66
67#include "locators.h"
68
69static int	gemini_com_match(device_t, cfdata_t , void *);
70static void	gemini_com_attach(device_t, device_t, void *);
71
72CFATTACH_DECL_NEW(gemini_com, sizeof(struct com_softc),
73    gemini_com_match, gemini_com_attach, NULL, NULL);
74
75static int
76gemini_com_match(device_t parent, cfdata_t cf, void *aux)
77{
78	struct obio_attach_args *obio = aux;
79	bus_space_handle_t bh;
80	int rv;
81
82	if (obio->obio_addr == -1 || obio->obio_intr == -1)
83	    panic("gemini_com must have addr and intr specified in config.");
84
85	if (obio->obio_size == 0)
86		obio->obio_size = GEMINI_UART_SIZE;
87
88	if (com_is_console(obio->obio_iot, obio->obio_addr, NULL))
89		return (1);
90
91	if (bus_space_map(obio->obio_iot, obio->obio_addr, obio->obio_size,
92			  0, &bh))
93		return (0);
94
95	rv = comprobe1(obio->obio_iot, bh);
96
97	bus_space_unmap(obio->obio_iot, bh, obio->obio_size);
98
99	return (rv);
100}
101
102static void
103gemini_com_attach(device_t parent, device_t self, void *aux)
104{
105	struct com_softc *sc = device_private(self);
106	struct obio_attach_args *obio = aux;
107	bus_space_tag_t iot;
108	bus_space_handle_t ioh;
109	bus_addr_t iobase;
110
111	sc->sc_dev = self;
112	iot = obio->obio_iot;
113	iobase = obio->obio_addr;
114	sc->sc_frequency = GEMINI_COM_FREQ;
115	sc->sc_type = COM_TYPE_16550_NOERS;
116
117	if (com_is_console(iot, iobase, &ioh) == 0 &&
118	    bus_space_map(iot, iobase, obio->obio_size, 0, &ioh)) {
119		panic(": can't map registers\n");
120		return;
121	}
122	com_init_regs(&sc->sc_regs, iot, ioh, iobase);
123
124	com_attach_subr(sc);
125	aprint_naive("\n");
126
127	intr_establish(obio->obio_intr, IPL_SERIAL, IST_LEVEL_HIGH,
128		comintr, sc);
129}
130