1/*-
2 * Copyright (c) 2012 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/condvar.h>
37#include <sys/conf.h>
38#include <sys/consio.h>				/* struct vt_mode */
39#include <sys/fbio.h>				/* video_adapter_t */
40#include <sys/kernel.h>
41#include <sys/lock.h>
42#include <sys/malloc.h>
43#include <sys/module.h>
44#include <sys/mutex.h>
45#include <sys/rman.h>
46#include <sys/systm.h>
47
48#include <machine/bus.h>
49#include <machine/resource.h>
50
51#include <dev/terasic/mtl/terasic_mtl.h>
52
53/*
54 * Device driver for the Terasic Multitouch LCD (MTL).  Three separate
55 * sub-drivers that support, respectively, access to device control registers,
56 * the pixel frame buffer, and the text frame buffer.  The last of these is
57 * also hooked up to syscons.
58 *
59 * Eventually, the frame buffer control registers and touch screen input FIFO
60 * will end up being separate sub-drivers as well.
61 *
62 * Note: sub-driver detach routines must check whether or not they have
63 * attached as they may be called even if the attach routine hasn't been, on
64 * an error.
65 */
66
67devclass_t	terasic_mtl_devclass;
68
69int
70terasic_mtl_attach(struct terasic_mtl_softc *sc)
71{
72	int error;
73
74	error = terasic_mtl_reg_attach(sc);
75	if (error)
76		goto error;
77	error = terasic_mtl_pixel_attach(sc);
78	if (error)
79		goto error;
80	error = terasic_mtl_text_attach(sc);
81	if (error)
82		goto error;
83	/*
84	 * XXXRW: Once we've attached syscons, we can't detach it, so do it
85	 * last.
86	 */
87	error = terasic_mtl_syscons_attach(sc);
88	if (error)
89		goto error;
90	terasic_mtl_blend_default_set(sc, TERASIC_MTL_COLOR_BLACK);
91	terasic_mtl_blend_pixel_set(sc, TERASIC_MTL_ALPHA_TRANSPARENT);
92	terasic_mtl_blend_textfg_set(sc, TERASIC_MTL_ALPHA_OPAQUE);
93	terasic_mtl_blend_textbg_set(sc, TERASIC_MTL_ALPHA_OPAQUE);
94	return (0);
95error:
96	terasic_mtl_text_detach(sc);
97	terasic_mtl_pixel_detach(sc);
98	terasic_mtl_reg_detach(sc);
99	return (error);
100}
101
102void
103terasic_mtl_detach(struct terasic_mtl_softc *sc)
104{
105
106	/* XXXRW: syscons can't detach, but we try anyway, only to panic. */
107	terasic_mtl_syscons_detach(sc);
108
109	/* All other aspects of the driver can detach just fine. */
110	terasic_mtl_text_detach(sc);
111	terasic_mtl_pixel_detach(sc);
112	terasic_mtl_reg_detach(sc);
113}
114