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 <sys/param.h>
39 #include <sys/consio.h> /* struct vt_mode */
40 #include <sys/endian.h>
41 #include <sys/fbio.h> /* video_adapter_t */
43 #include <sys/mutex.h>
45 #include <sys/systm.h>
48 #include <machine/bus.h>
49 #include <machine/resource.h>
50 #include <machine/vm.h>
52 #include <dev/terasic/mtl/terasic_mtl.h>
54 static d_mmap_t terasic_mtl_text_mmap;
55 static d_read_t terasic_mtl_text_read;
56 static d_write_t terasic_mtl_text_write;
58 static struct cdevsw terasic_mtl_text_cdevsw = {
59 .d_version = D_VERSION,
60 .d_mmap = terasic_mtl_text_mmap,
61 .d_read = terasic_mtl_text_read,
62 .d_write = terasic_mtl_text_write,
63 .d_name = "terasic_mtl_text",
67 * All I/O to/from the mtl device must be 16-bit, and aligned to 16-bit.
70 terasic_mtl_text_read(struct cdev *dev, struct uio *uio, int flag)
72 struct terasic_mtl_softc *sc;
77 if (uio->uio_offset < 0 || uio->uio_offset % 2 != 0 ||
78 uio->uio_resid % 2 != 0)
81 size = rman_get_size(sc->mtl_text_res);
83 if ((uio->uio_offset + uio->uio_resid < 0) ||
84 (uio->uio_offset + uio->uio_resid > size))
86 while (uio->uio_resid > 0) {
87 offset = uio->uio_offset;
88 if (offset + sizeof(v) > size)
90 v = bus_read_2(sc->mtl_text_res, offset);
91 error = uiomove(&v, sizeof(v), uio);
99 terasic_mtl_text_write(struct cdev *dev, struct uio *uio, int flag)
101 struct terasic_mtl_softc *sc;
106 if (uio->uio_offset < 0 || uio->uio_offset % 2 != 0 ||
107 uio->uio_resid % 2 != 0)
110 size = rman_get_size(sc->mtl_text_res);
112 while (uio->uio_resid > 0) {
113 offset = uio->uio_offset;
114 if (offset + sizeof(v) > size)
116 error = uiomove(&v, sizeof(v), uio);
119 bus_write_2(sc->mtl_text_res, offset, v);
125 terasic_mtl_text_mmap(struct cdev *dev, vm_ooffset_t offset,
126 vm_paddr_t *paddr, int nprot, vm_memattr_t *memattr)
128 struct terasic_mtl_softc *sc;
133 if (trunc_page(offset) == offset &&
134 offset + PAGE_SIZE > offset &&
135 rman_get_size(sc->mtl_text_res) >= offset + PAGE_SIZE) {
136 *paddr = rman_get_start(sc->mtl_text_res) + offset;
137 *memattr = VM_MEMATTR_UNCACHEABLE;
144 terasic_mtl_text_putc(struct terasic_mtl_softc *sc, u_int x, u_int y,
145 uint8_t c, uint8_t a)
150 KASSERT(x < TERASIC_MTL_COLS, ("%s: TERASIC_MTL_COLS", __func__));
151 KASSERT(y < TERASIC_MTL_ROWS, ("%s: TERASIC_MTL_ROWS", __func__));
153 offset = sizeof(uint16_t) * (x + y * TERASIC_MTL_COLS);
154 v = (c << TERASIC_MTL_TEXTFRAMEBUF_CHAR_SHIFT) |
155 (a << TERASIC_MTL_TEXTFRAMEBUF_ATTR_SHIFT);
157 bus_write_2(sc->mtl_text_res, offset, v);
161 terasic_mtl_text_attach(struct terasic_mtl_softc *sc)
166 terasic_mtl_reg_textframebufaddr_get(sc, &v);
167 if (v != TERASIC_MTL_TEXTFRAMEBUF_EXPECTED_ADDR) {
168 device_printf(sc->mtl_dev, "%s: unexpected text frame buffer "
169 "address (%08x); cannot attach\n", __func__, v);
172 for (offset = 0; offset < rman_get_size(sc->mtl_text_res);
173 offset += sizeof(uint16_t))
174 bus_write_2(sc->mtl_text_res, offset, 0);
176 sc->mtl_text_cdev = make_dev(&terasic_mtl_text_cdevsw, sc->mtl_unit,
177 UID_ROOT, GID_WHEEL, 0400, "mtl_text%d", sc->mtl_unit);
178 if (sc->mtl_text_cdev == NULL) {
179 device_printf(sc->mtl_dev, "%s: make_dev failed\n", __func__);
182 /* XXXRW: Slight race between make_dev(9) and here. */
183 TERASIC_MTL_LOCK_INIT(sc);
184 sc->mtl_text_cdev->si_drv1 = sc;
189 terasic_mtl_text_detach(struct terasic_mtl_softc *sc)
192 if (sc->mtl_text_cdev != NULL) {
193 destroy_dev(sc->mtl_text_cdev);
194 TERASIC_MTL_LOCK_DESTROY(sc);