2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Robert N. M. Watson
7 * This software was developed by SRI International and the University of
8 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
9 * ("CTSRD"), as part of the DARPA CRASH research programme.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include "opt_syscons.h"
38 #include <sys/param.h>
40 #include <sys/condvar.h>
42 #include <sys/consio.h> /* struct vt_mode */
43 #include <sys/endian.h>
44 #include <sys/fbio.h> /* video_adapter_t */
45 #include <sys/kernel.h>
47 #include <sys/malloc.h>
48 #include <sys/module.h>
49 #include <sys/mutex.h>
51 #include <sys/systm.h>
53 #include <machine/bus.h>
54 #include <machine/resource.h>
56 #include <dev/terasic/mtl/terasic_mtl.h>
59 * Device driver for the Terasic Multitouch LCD (MTL). Three separate
60 * sub-drivers that support, respectively, access to device control registers,
61 * the pixel frame buffer, and the text frame buffer. The pixel frame buffer
62 * is hooked up to vt(4), and the text frame buffer to syscons(4).
64 * Eventually, the frame buffer control registers and touch screen input FIFO
65 * will end up being separate sub-drivers as well.
67 * Note: sub-driver detach routines must check whether or not they have
68 * attached as they may be called even if the attach routine hasn't been, on
72 devclass_t terasic_mtl_devclass;
75 terasic_mtl_attach(struct terasic_mtl_softc *sc)
79 error = terasic_mtl_reg_attach(sc);
82 error = terasic_mtl_pixel_attach(sc);
85 error = terasic_mtl_text_attach(sc);
89 * XXXRW: Once we've attached syscons or vt, we can't detach it, so do
93 terasic_mtl_reg_pixel_endian_set(sc, BYTE_ORDER == BIG_ENDIAN);
94 error = terasic_mtl_fbd_attach(sc);
97 terasic_mtl_blend_pixel_set(sc, TERASIC_MTL_ALPHA_OPAQUE);
98 terasic_mtl_blend_textfg_set(sc, TERASIC_MTL_ALPHA_TRANSPARENT);
99 terasic_mtl_blend_textbg_set(sc, TERASIC_MTL_ALPHA_TRANSPARENT);
102 error = terasic_mtl_syscons_attach(sc);
105 terasic_mtl_blend_pixel_set(sc, TERASIC_MTL_ALPHA_TRANSPARENT);
106 terasic_mtl_blend_textfg_set(sc, TERASIC_MTL_ALPHA_OPAQUE);
107 terasic_mtl_blend_textbg_set(sc, TERASIC_MTL_ALPHA_OPAQUE);
109 terasic_mtl_blend_default_set(sc, TERASIC_MTL_COLOR_BLACK);
112 terasic_mtl_text_detach(sc);
113 terasic_mtl_pixel_detach(sc);
114 terasic_mtl_reg_detach(sc);
119 terasic_mtl_detach(struct terasic_mtl_softc *sc)
122 /* XXXRW: syscons and vt can't detach, but try anyway, only to panic. */
124 terasic_mtl_syscons_detach(sc);
127 terasic_mtl_fbd_detach(sc);
130 /* All other aspects of the driver can detach just fine. */
131 terasic_mtl_text_detach(sc);
132 terasic_mtl_pixel_detach(sc);
133 terasic_mtl_reg_detach(sc);