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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/consio.h> /* struct vt_mode */
#include <sys/endian.h>
#include <sys/fbio.h> /* video_adapter_t */
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/vm.h>
#include <dev/terasic/mtl/terasic_mtl.h>
static d_mmap_t terasic_mtl_text_mmap;
static d_read_t terasic_mtl_text_read;
static d_write_t terasic_mtl_text_write;
static struct cdevsw terasic_mtl_text_cdevsw = {
.d_version = D_VERSION,
.d_mmap = terasic_mtl_text_mmap,
.d_read = terasic_mtl_text_read,
.d_write = terasic_mtl_text_write,
.d_name = "terasic_mtl_text",
};
/*
* All I/O to/from the mtl device must be 16-bit, and aligned to 16-bit.
*/
static int
terasic_mtl_text_read(struct cdev *dev, struct uio *uio, int flag)
{
struct terasic_mtl_softc *sc;
u_long offset, size;
uint16_t v;
int error;
if (uio->uio_offset < 0 || uio->uio_offset % 2 != 0 ||
uio->uio_resid % 2 != 0)
return (ENODEV);
sc = dev->si_drv1;
size = rman_get_size(sc->mtl_text_res);
error = 0;
if ((uio->uio_offset + uio->uio_resid < 0) ||
(uio->uio_offset + uio->uio_resid > size))
return (ENODEV);
while (uio->uio_resid > 0) {
offset = uio->uio_offset;
if (offset + sizeof(v) > size)
return (ENODEV);
v = bus_read_2(sc->mtl_text_res, offset);
error = uiomove(&v, sizeof(v), uio);
if (error)
return (error);
}
return (error);
}
static int
terasic_mtl_text_write(struct cdev *dev, struct uio *uio, int flag)
{
struct terasic_mtl_softc *sc;
u_long offset, size;
uint16_t v;
int error;
if (uio->uio_offset < 0 || uio->uio_offset % 2 != 0 ||
uio->uio_resid % 2 != 0)
return (ENODEV);
sc = dev->si_drv1;
size = rman_get_size(sc->mtl_text_res);
error = 0;
while (uio->uio_resid > 0) {
offset = uio->uio_offset;
if (offset + sizeof(v) > size)
return (ENODEV);
error = uiomove(&v, sizeof(v), uio);
if (error)
return (error);
bus_write_2(sc->mtl_text_res, offset, v);
}
return (error);
}
static int
terasic_mtl_text_mmap(struct cdev *dev, vm_ooffset_t offset,
vm_paddr_t *paddr, int nprot, vm_memattr_t *memattr)
{
struct terasic_mtl_softc *sc;
int error;
sc = dev->si_drv1;
error = 0;
if (trunc_page(offset) == offset &&
offset + PAGE_SIZE > offset &&
rman_get_size(sc->mtl_text_res) >= offset + PAGE_SIZE) {
*paddr = rman_get_start(sc->mtl_text_res) + offset;
*memattr = VM_MEMATTR_UNCACHEABLE;
} else
error = ENODEV;
return (error);
}
void
terasic_mtl_text_putc(struct terasic_mtl_softc *sc, u_int x, u_int y,
uint8_t c, uint8_t a)
{
u_int offset;
uint16_t v;
KASSERT(x < TERASIC_MTL_COLS, ("%s: TERASIC_MTL_COLS", __func__));
KASSERT(y < TERASIC_MTL_ROWS, ("%s: TERASIC_MTL_ROWS", __func__));
offset = sizeof(uint16_t) * (x + y * TERASIC_MTL_COLS);
v = (c << TERASIC_MTL_TEXTFRAMEBUF_CHAR_SHIFT) |
(a << TERASIC_MTL_TEXTFRAMEBUF_ATTR_SHIFT);
v = htole16(v);
bus_write_2(sc->mtl_text_res, offset, v);
}
int
terasic_mtl_text_attach(struct terasic_mtl_softc *sc)
{
uint32_t v;
u_int offset;
terasic_mtl_reg_textframebufaddr_get(sc, &v);
if (v != TERASIC_MTL_TEXTFRAMEBUF_EXPECTED_ADDR) {
device_printf(sc->mtl_dev, "%s: unexpected text frame buffer "
"address (%08x); cannot attach\n", __func__, v);
return (ENXIO);
}
for (offset = 0; offset < rman_get_size(sc->mtl_text_res);
offset += sizeof(uint16_t))
bus_write_2(sc->mtl_text_res, offset, 0);
sc->mtl_text_cdev = make_dev(&terasic_mtl_text_cdevsw, sc->mtl_unit,
UID_ROOT, GID_WHEEL, 0400, "mtl_text%d", sc->mtl_unit);
if (sc->mtl_text_cdev == NULL) {
device_printf(sc->mtl_dev, "%s: make_dev failed\n", __func__);
return (ENXIO);
}
/* XXXRW: Slight race between make_dev(9) and here. */
TERASIC_MTL_LOCK_INIT(sc);
sc->mtl_text_cdev->si_drv1 = sc;
return (0);
}
void
terasic_mtl_text_detach(struct terasic_mtl_softc *sc)
{
if (sc->mtl_text_cdev != NULL) {
destroy_dev(sc->mtl_text_cdev);
TERASIC_MTL_LOCK_DESTROY(sc);
}
}
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