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
67 devclass_t terasic_mtl_devclass;
68
69 int
terasic_mtl_attach(struct terasic_mtl_softc * sc)70 terasic_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);
95 error:
96 terasic_mtl_text_detach(sc);
97 terasic_mtl_pixel_detach(sc);
98 terasic_mtl_reg_detach(sc);
99 return (error);
100 }
101
102 void
terasic_mtl_detach(struct terasic_mtl_softc * sc)103 terasic_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