/*-
* Copyright (c) 2015-2017 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were 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.
*
* Portions of this software were developed by the University of Cambridge
* Computer Laboratory as part of the CTSRD Project, with support from the
* UK Higher Education Innovation Fund (HEIF).
*
* 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/kdb.h>
#include <sys/kernel.h>
#include <sys/priv.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/cons.h>
#include <sys/consio.h>
#include <sys/tty.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <dev/ofw/openfirm.h>
#include <ddb/ddb.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/asm.h>
#include <machine/trap.h>
#include <machine/vmparam.h>
#include <machine/sbi.h>
/* bus softc */
struct rcons_softc {
struct resource *res[1];
void *ihl[1];
device_t dev;
};
/* CN Console interface */
static tsw_outwakeup_t riscvtty_outwakeup;
static struct ttydevsw riscv_ttydevsw = {
.tsw_flags = TF_NOPREFIX,
.tsw_outwakeup = riscvtty_outwakeup,
};
static int polltime;
static struct callout riscv_callout;
static struct tty *tp = NULL;
#if defined(KDB)
static int alt_break_state;
#endif
static void riscv_timeout(void *);
static cn_probe_t riscv_cnprobe;
static cn_init_t riscv_cninit;
static cn_term_t riscv_cnterm;
static cn_getc_t riscv_cngetc;
static cn_putc_t riscv_cnputc;
static cn_grab_t riscv_cngrab;
static cn_ungrab_t riscv_cnungrab;
CONSOLE_DRIVER(riscv);
#define MAX_BURST_LEN 1
static void
riscv_putc(int c)
{
sbi_console_putchar(c);
}
#ifdef EARLY_PRINTF
early_putc_t *early_putc = riscv_putc;
#endif
static void
cn_drvinit(void *unused)
{
if (riscv_consdev.cn_pri != CN_DEAD &&
riscv_consdev.cn_name[0] != '\0') {
tp = tty_alloc(&riscv_ttydevsw, NULL);
tty_init_console(tp, 0);
tty_makedev(tp, NULL, "%s", "rcons");
polltime = 1;
callout_init(&riscv_callout, 1);
callout_reset(&riscv_callout, polltime, riscv_timeout, NULL);
}
}
SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL);
static void
riscvtty_outwakeup(struct tty *tp)
{
u_char buf[MAX_BURST_LEN];
int len;
int i;
for (;;) {
len = ttydisc_getc(tp, buf, sizeof(buf));
if (len == 0)
break;
KASSERT(len == 1, ("tty error"));
for (i = 0; i < len; i++)
riscv_putc(buf[i]);
}
}
static void
riscv_timeout(void *v)
{
int c;
tty_lock(tp);
while ((c = riscv_cngetc(NULL)) != -1)
ttydisc_rint(tp, c, 0);
ttydisc_rint_done(tp);
tty_unlock(tp);
callout_reset(&riscv_callout, polltime, riscv_timeout, NULL);
}
static void
riscv_cnprobe(struct consdev *cp)
{
cp->cn_pri = CN_NORMAL;
}
static void
riscv_cninit(struct consdev *cp)
{
strcpy(cp->cn_name, "rcons");
}
static void
riscv_cnterm(struct consdev *cp)
{
}
static void
riscv_cngrab(struct consdev *cp)
{
}
static void
riscv_cnungrab(struct consdev *cp)
{
}
static int
riscv_cngetc(struct consdev *cp)
{
int ch;
ch = sbi_console_getchar();
if (ch > 0 && ch < 0xff) {
#if defined(KDB)
kdb_alt_break(ch, &alt_break_state);
#endif
return (ch);
}
return (-1);
}
static void
riscv_cnputc(struct consdev *cp, int c)
{
riscv_putc(c);
}
/* Bus interface */
static int
rcons_probe(device_t dev)
{
device_set_desc(dev, "RISC-V console");
return (BUS_PROBE_DEFAULT);
}
static int
rcons_attach(device_t dev)
{
struct rcons_softc *sc;
if (device_get_unit(dev) != 0)
return (ENXIO);
sc = device_get_softc(dev);
sc->dev = dev;
csr_set(sie, SIE_SSIE);
bus_generic_attach(sc->dev);
return (0);
}
static device_method_t rcons_methods[] = {
DEVMETHOD(device_probe, rcons_probe),
DEVMETHOD(device_attach, rcons_attach),
DEVMETHOD_END
};
static driver_t rcons_driver = {
"rcons",
rcons_methods,
sizeof(struct rcons_softc)
};
static devclass_t rcons_devclass;
DRIVER_MODULE(rcons, nexus, rcons_driver, rcons_devclass, 0, 0);
