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/* $OpenBSD: com_leioc.c,v 1.2 2017/02/19 10:18:41 visa Exp $ */
/*
* Copyright (c) 2016 Visa Hankala
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/termios.h>
#include <sys/tty.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/loongson3.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <loongson/dev/leiocreg.h>
#include <loongson/dev/leiocvar.h>
#define UART_FREQ 33000000
#define UART_RATE 115200
int com_leioc_match(struct device *, void *, void *);
void com_leioc_attach(struct device *, struct device *, void *);
int com_leioc_intr(void *);
const struct cfattach com_leioc_ca = {
sizeof(struct com_softc), com_leioc_match, com_leioc_attach
};
extern struct cfdriver com_cd;
int
com_leioc_match(struct device *parent, void *match, void *aux)
{
struct leioc_attach_args *laa = aux;
if (strcmp(laa->laa_name, com_cd.cd_name) == 0)
return 1;
return 0;
}
void
com_leioc_attach(struct device *parent, struct device *self, void *aux)
{
struct leioc_attach_args *laa = aux;
struct com_softc *sc = (void *)self;
int console = 0;
if (comconsiot == &leioc_io_space_tag && comconsaddr == laa->laa_base)
console = 1;
sc->sc_hwflags = 0;
sc->sc_swflags = 0;
sc->sc_frequency = UART_FREQ;
if (!console || comconsattached) {
sc->sc_iot = &leioc_io_space_tag;
sc->sc_iobase = laa->laa_base;
if (bus_space_map(sc->sc_iot, sc->sc_iobase, COM_NPORTS, 0,
&sc->sc_ioh)) {
printf(": could not map UART registers\n");
return;
}
} else {
/* Reuse the early console settings. */
sc->sc_iot = comconsiot;
sc->sc_iobase = comconsaddr;
if (comcnattach(sc->sc_iot, sc->sc_iobase, comconsrate,
sc->sc_frequency, comconscflag))
panic("could not set up serial console");
sc->sc_ioh = comconsioh;
}
com_attach_subr(sc);
loongson3_intr_establish(LS3_IRQ_LPC, IPL_TTY, com_leioc_intr, sc,
sc->sc_dev.dv_xname);
}
int
com_leioc_intr(void *arg)
{
comintr(arg);
/*
* Always return non-zero to prevent console clutter about spurious
* interrupts. comstart() enables the transmitter holding register
* empty interrupt before adding data to the FIFO, which can trigger
* a premature interrupt on the primary CPU in a multiprocessor system.
*/
return 1;
}
void
leioc_cons_setup(void)
{
comconsiot = &leioc_io_space_tag;
comconsaddr = LEIOC_UART0_BASE;
comconsfreq = UART_FREQ;
comconsrate = UART_RATE;
comconscflag = (TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) |
CS8 | CLOCAL;
}
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