/* $NetBSD: wmcom.c,v 1.7 2018/09/03 16:29:24 riastradh Exp $ */
/*
* Copyright (c) 2012 KIYOHARA Takashi
* All rights reserved.
*
* 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 ``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 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>
__KERNEL_RCSID(0, "$NetBSD: wmcom.c,v 1.7 2018/09/03 16:29:24 riastradh Exp $");
#include "rnd.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/fcntl.h>
#include <sys/intr.h>
#include <sys/kauth.h>
#include <sys/lwp.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/termios.h>
#include <sys/tty.h>
#include <sys/types.h>
#include <epoc32/windermere/windermerereg.h>
#include <epoc32/windermere/windermerevar.h>
#include <dev/cons.h>
#ifdef RND_COM
#include <sys/rndsource.h>
#endif
#include "ioconf.h"
#include "locators.h"
#define COMUNIT(x) TTUNIT(x)
#define COMDIALOUT(x) TTDIALOUT(x)
#define WMCOM_RING_SIZE 2048
struct wmcom_softc {
device_t sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
void *sc_si;
struct tty *sc_tty;
u_char *sc_tba;
u_int sc_tbc;
u_char *sc_rbuf;
char *volatile sc_rbget;
char *volatile sc_rbput;
volatile int sc_rbavail;
int sc_tx_done;
int sc_rx_ready;
int sc_hwflags;
#define COM_HW_CONSOLE (1 << 0)
#define COM_HW_DEV_OK (1 << 1)
#define COM_HW_KGDB (1 << 2)
int sc_swflags;
int sc_flags;
#define WMCOM_IRDA (1 << 0)
#ifdef RND_COM
krandsource_t rnd_source;
#endif
};
static int wmcom_match(device_t, cfdata_t, void *);
static void wmcom_attach(device_t, device_t, void *);
static int wmcom_intr(void *);
static void wmcom_soft(void *);
static void wmcom_start(struct tty *);
static int wmcom_param(struct tty *, struct termios *);
static int wmcom_hwiflow(struct tty *, int);
dev_type_open(wmcomopen);
dev_type_close(wmcomclose);
dev_type_read(wmcomread);
dev_type_write(wmcomwrite);
dev_type_ioctl(wmcomioctl);
dev_type_stop(wmcomstop);
dev_type_tty(wmcomtty);
dev_type_poll(wmcompoll);
static void wmcom_iflush(struct wmcom_softc *);
static void wmcom_shutdown(struct wmcom_softc *);
static void wmcom_break(struct wmcom_softc *, int);
static void wmcom_rxsoft(struct wmcom_softc *, struct tty *);
static inline uint32_t wmcom_rate2lcr(int);
static uint8_t wmcom_cflag2fcr(tcflag_t);
static int wmcom_cngetc(dev_t);
static void wmcom_cnputc(dev_t, int);
static void wmcom_cnpollc(dev_t, int);
CFATTACH_DECL_NEW(wmcom, sizeof(struct wmcom_softc),
wmcom_match, wmcom_attach, NULL, NULL);
const struct cdevsw wmcom_cdevsw = {
.d_open = wmcomopen,
.d_close = wmcomclose,
.d_read = wmcomread,
.d_write = wmcomwrite,
.d_ioctl = wmcomioctl,
.d_stop = wmcomstop,
.d_tty = wmcomtty,
.d_poll = wmcompoll,
.d_mmap = nommap,
.d_kqfilter = ttykqfilter,
.d_discard = nodiscard,
.d_flag = D_TTY
};
static struct cnm_state wmcom_cnm_state;
static vaddr_t wmcom_cnaddr;
static int wmcom_cnrate;
static tcflag_t wmcom_cncflag;
/* ARGSUSED */
static int
wmcom_match(device_t parent, cfdata_t match, void *aux)
{
struct windermere_attach_args *aa = aux;
/* Wildcard not accept */
if (aa->aa_offset == WINDERMERECF_OFFSET_DEFAULT ||
aa->aa_irq == WINDERMERECF_IRQ_DEFAULT)
return 0;
aa->aa_size = UART_SIZE;
return 1;
}
/* ARGSUSED */
static void
wmcom_attach(device_t parent, device_t self, void *aux)
{
struct wmcom_softc *sc = device_private(self);
struct windermere_attach_args *aa = aux;
aprint_naive("\n");
aprint_normal("\n");
sc->sc_dev = self;
if (windermere_bus_space_subregion(aa->aa_iot, *aa->aa_ioh,
aa->aa_offset, aa->aa_size, &sc->sc_ioh) != 0) {
aprint_error_dev(self, "can't map registers\n");
return;
}
sc->sc_iot = aa->aa_iot;
if (intr_establish(aa->aa_irq, IPL_SERIAL, 0, wmcom_intr, sc) == NULL) {
aprint_error_dev(self, "can't establish interrupt\n");
return;
}
if (aa->aa_offset == (wmcom_cnaddr & 0xfff))
SET(sc->sc_hwflags, COM_HW_CONSOLE);
if (aa->aa_offset == WINDERMERE_COM0_OFFSET)
SET(sc->sc_flags, WMCOM_IRDA);
sc->sc_tty = tty_alloc();
sc->sc_tty->t_oproc = wmcom_start;
sc->sc_tty->t_param = wmcom_param;
sc->sc_tty->t_hwiflow = wmcom_hwiflow;
sc->sc_tbc = 0;
sc->sc_rbuf = malloc(WMCOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT);
if (sc->sc_rbuf == NULL) {
aprint_error_dev(self, "unable to allocate ring buffer\n");
return;
}
sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf;
sc->sc_rbavail = WMCOM_RING_SIZE;
tty_attach(sc->sc_tty);
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
int maj = cdevsw_lookup_major(&wmcom_cdevsw);
sc->sc_tty->t_dev = makedev(maj, device_unit(sc->sc_dev));
cn_tab->cn_dev = sc->sc_tty->t_dev;
aprint_normal_dev(self, "console\n");
}
sc->sc_si = softint_establish(SOFTINT_SERIAL, wmcom_soft, sc);
#ifdef RND_COM
rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev),
RND_TYPE_TTY, RND_FLAG_DEFAULT);
#endif
SET(sc->sc_hwflags, COM_HW_DEV_OK);
}
static int
wmcom_intr(void *arg)
{
struct wmcom_softc *sc = arg;
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int cc;
uint32_t data;
uint8_t fr, intm;
u_char *put;
if (!device_is_active(sc->sc_dev))
return 0;
fr = bus_space_read_1(iot, ioh, UARTFR);
intm = bus_space_read_1(iot, ioh, UARTINTM);
if (bus_space_read_1(iot, ioh, UARTINT) & INT_RXINT) {
put = sc->sc_rbput;
cc = sc->sc_rbavail;
while (cc > 0) {
if (ISSET(fr, FR_RXFE))
break;
data = bus_space_read_4(iot, ioh, UARTDR);
cn_check_magic(sc->sc_tty->t_dev, data & 0xff,
wmcom_cnm_state);
put[0] = data & 0xff;
put[1] = (data >> 8) & 0xff;
put += 2;
if (put >= sc->sc_rbuf + (WMCOM_RING_SIZE << 1))
put = sc->sc_rbuf;
cc--;
sc->sc_rx_ready = 1;
fr = bus_space_read_1(iot, ioh, UARTFR);
}
/*
* Current string of incoming characters ended because
* no more data was available or we ran out of space.
* Schedule a receive event if any data was received.
* If we're out of space, turn off receive interrupts.
*/
sc->sc_rbput = put;
sc->sc_rbavail = cc;
/*
* See if we are in danger of overflowing a buffer. If
* so, use hardware flow control to ease the pressure.
*/
/* but wmcom cannot. X-( */
/*
* If we're out of space, disable receive interrupts
* until the queue has drained a bit.
*/
if (cc <= 0)
CLR(intm, INT_RXINT);
}
/*
* Done handling any receive interrupts. See if data can be
* transmitted as well. Schedule tx done event if no data left
* and tty was marked busy.
*/
if (!ISSET(fr, FR_TXFF)) {
/* Output the next chunk of the contiguous buffer, if any. */
if (sc->sc_tbc > 0) {
while (sc->sc_tbc > 0 && !ISSET(fr, FR_TXFF)) {
bus_space_write_1(iot, ioh, UARTDR,
*sc->sc_tba);
sc->sc_tba++;
sc->sc_tbc--;
fr = bus_space_read_1(iot, ioh, UARTFR);
}
} else if (!ISSET(fr, FR_BUSY) && ISSET(intm, INT_TXINT)) {
CLR(intm, INT_TXINT);
sc->sc_tx_done = 1;
}
}
bus_space_write_1(iot, ioh, UARTINTM, intm);
/* Wake up the poller. */
softint_schedule(sc->sc_si);
return 1;
}
static void
wmcom_soft(void *arg)
{
struct wmcom_softc *sc = arg;
struct tty *tp = sc->sc_tty;
if (!device_is_active(sc->sc_dev))
return;
if (sc->sc_rx_ready) {
sc->sc_rx_ready = 0;
wmcom_rxsoft(sc, tp);
}
if (sc->sc_tx_done) {
sc->sc_tx_done = 0;
CLR(tp->t_state, TS_BUSY);
if (ISSET(tp->t_state, TS_FLUSH))
CLR(tp->t_state, TS_FLUSH);
else
ndflush(&tp->t_outq,
(int)(sc->sc_tba - tp->t_outq.c_cf));
(*tp->t_linesw->l_start)(tp);
}
}
static void
wmcom_start(struct tty *tp)
{
struct wmcom_softc *sc
= device_lookup_private(&wmcom_cd, COMUNIT(tp->t_dev));
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int s, n;
uint8_t intm;
if (!device_is_active(sc->sc_dev))
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
goto out;
if (!ttypull(tp))
goto out;
/* Grab the first contiguous region of buffer space. */
{
u_char *tba;
int tbc;
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
(void)splserial();
sc->sc_tba = tba;
sc->sc_tbc = tbc;
}
SET(tp->t_state, TS_BUSY);
intm = bus_space_read_1(iot, ioh, UARTINTM);
if (!ISSET(intm, INT_TXINT)) {
bus_space_write_1(iot, ioh, UARTINTM, intm | INT_TXINT);
/* Output the first chunk of the contiguous buffer. */
n = uimin(sc->sc_tbc, UART_FIFO_SIZE);
bus_space_write_multi_1(iot, ioh, UARTDR, sc->sc_tba, n);
sc->sc_tba += n;
sc->sc_tbc -= n;
}
out:
splx(s);
return;
}
static int
wmcom_param(struct tty *tp, struct termios *t)
{
struct wmcom_softc *sc =
device_lookup_private(&wmcom_cd, COMUNIT(tp->t_dev));
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int s;
if (!device_is_active(sc->sc_dev))
return ENXIO;
if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
return EINVAL;
/*
* For the console, always force CLOCAL and !HUPCL, so that the port
* is always active.
*/
if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) ||
ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
SET(t->c_cflag, CLOCAL);
CLR(t->c_cflag, HUPCL);
}
/*
* If there were no changes, don't do anything. This avoids dropping
* input and improves performance when all we did was frob things like
* VMIN and VTIME.
*/
if (tp->t_ospeed == t->c_ospeed &&
tp->t_cflag == t->c_cflag)
return 0;
s = splserial();
bus_space_write_4(iot, ioh, UARTLCR, wmcom_rate2lcr(t->c_ospeed));
bus_space_write_1(iot, ioh, UARTFCR, wmcom_cflag2fcr(t->c_cflag));
/* And copy to tty. */
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
splx(s);
/*
* Update the tty layer's idea of the carrier bit.
* We tell tty the carrier is always on.
*/
(*tp->t_linesw->l_modem)(tp, 1);
return 0;
}
static int
wmcom_hwiflow(struct tty *tp, int block)
{
/* Nothing */
return 0;
}
/* ARGSUSED */
int
wmcomopen(dev_t dev, int flag, int mode, struct lwp *l)
{
struct wmcom_softc *sc;
struct tty *tp;
int error, s, s2;
uint8_t con;
sc = device_lookup_private(&wmcom_cd, COMUNIT(dev));
if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK))
return ENXIO;
if (!device_is_active(sc->sc_dev))
return ENXIO;
#ifdef KGDB
/*
* If this is the kgdb port, no other use is permitted.
*/
if (ISSET(sc->sc_hwflags, COM_HW_KGDB))
return EBUSY;
#endif
tp = sc->sc_tty;
if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
return EBUSY;
s = spltty();
/*
* Do the following iff this is a first open.
*/
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
struct termios t;
tp->t_dev = dev;
/* Enable and turn on interrupt */
con = CON_UARTEN;
if (ISSET(sc->sc_flags, WMCOM_IRDA))
con |= CON_IRTXM;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, UARTCON, con);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, UARTINTM, INT_RXINT);
/*
* Initialize the termios status to the defaults. Add in the
* sticky bits from TIOCSFLAGS.
*/
t.c_ispeed = 0;
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
t.c_ospeed = wmcom_cnrate;
t.c_cflag = wmcom_cncflag;
} else {
t.c_ospeed = TTYDEF_SPEED;
t.c_cflag = TTYDEF_CFLAG;
}
if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
SET(t.c_cflag, CLOCAL);
if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
SET(t.c_cflag, CRTSCTS);
if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
SET(t.c_cflag, MDMBUF);
/* Make sure wmcom_param() we do something */
tp->t_ospeed = 0;
wmcom_param(tp, &t);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
ttychars(tp);
ttsetwater(tp);
s2 = splserial();
/* Clear the input ring. */
sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf;
sc->sc_rbavail = WMCOM_RING_SIZE;
wmcom_iflush(sc);
splx(s2);
}
splx(s);
error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK));
if (error)
goto bad;
error = (*tp->t_linesw->l_open)(dev, tp);
if (error)
goto bad;
return 0;
bad:
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
/*
* We failed to open the device, and nobody else had it opened.
* Clean up the state as appropriate.
*/
wmcom_shutdown(sc);
/* Disable UART */
if (!ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
bus_space_write_1(sc->sc_iot, sc->sc_ioh, UARTCON, 0);
}
return error;
}
/* ARGSUSED */
int
wmcomclose(dev_t dev, int flag, int mode, struct lwp *l)
{
struct wmcom_softc *sc = device_lookup_private(&wmcom_cd, COMUNIT(dev));
struct tty *tp = sc->sc_tty;
/* XXXX This is for cons.c. */
if (!ISSET(tp->t_state, TS_ISOPEN))
return 0;
(*tp->t_linesw->l_close)(tp, flag);
ttyclose(tp);
if (!device_is_active(sc->sc_dev))
return 0;
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
/*
* Although we got a last close, the device may still be in
* use; e.g. if this was the dialout node, and there are still
* processes waiting for carrier on the non-dialout node.
*/
wmcom_shutdown(sc);
/* Disable UART */
if (!ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
bus_space_write_1(sc->sc_iot, sc->sc_ioh, UARTCON, 0);
}
return 0;
}
int
wmcomread(dev_t dev, struct uio *uio, int flag)
{
struct wmcom_softc *sc = device_lookup_private(&wmcom_cd, COMUNIT(dev));
struct tty *tp = sc->sc_tty;
if (!device_is_active(sc->sc_dev))
return EIO;
return (*tp->t_linesw->l_read)(tp, uio, flag);
}
int
wmcomwrite(dev_t dev, struct uio *uio, int flag)
{
struct wmcom_softc *sc = device_lookup_private(&wmcom_cd, COMUNIT(dev));
struct tty *tp = sc->sc_tty;
if (!device_is_active(sc->sc_dev))
return EIO;
return (*tp->t_linesw->l_write)(tp, uio, flag);
}
int
wmcomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
struct wmcom_softc *sc = device_lookup_private(&wmcom_cd, COMUNIT(dev));
struct tty *tp = sc->sc_tty;
int error, s;
if (!device_is_active(sc->sc_dev))
return EIO;
error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
if (error != EPASSTHROUGH)
return error;
error = ttioctl(tp, cmd, data, flag, l);
if (error != EPASSTHROUGH)
return error;
switch (cmd) {
case TIOCSFLAGS:
error = kauth_authorize_device_tty(l->l_cred,
KAUTH_DEVICE_TTY_PRIVSET, tp);
break;
default:
break;
}
if (error)
return error;
s = splserial();
error = 0;
switch (cmd) {
case TIOCSBRK:
wmcom_break(sc, 1);
break;
case TIOCCBRK:
wmcom_break(sc, 0);
break;
case TIOCGFLAGS:
*(int *)data = sc->sc_swflags;
break;
case TIOCSFLAGS:
sc->sc_swflags = *(int *)data;
break;
default:
error = EPASSTHROUGH;
break;
}
splx(s);
return error;
}
int
wmcompoll(dev_t dev, int events, struct lwp *l)
{
struct wmcom_softc *sc = device_lookup_private(&wmcom_cd, COMUNIT(dev));
struct tty *tp = sc->sc_tty;
if (!device_is_active(sc->sc_dev))
return EIO;
return (*tp->t_linesw->l_poll)(tp, events, l);
}
struct tty *
wmcomtty(dev_t dev)
{
struct wmcom_softc *sc = device_lookup_private(&wmcom_cd, COMUNIT(dev));
return sc->sc_tty;
}
void
wmcomstop(struct tty *tp, int flag)
{
int s;
s = splserial();
if (ISSET(tp->t_state, TS_BUSY)) {
/* Stop transmitting at the next chunk. */
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
}
splx(s);
}
static void
wmcom_iflush(struct wmcom_softc *sc)
{
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int timo;
timo = 50000;
while ((bus_space_read_1(iot, ioh, UARTFR) & FR_RXFE) == 0 &&
timo--)
bus_space_read_1(iot, ioh, UARTDR);
if (timo == 0)
printf("%s: iflush timeout\n", device_xname(sc->sc_dev));
}
static void
wmcom_shutdown(struct wmcom_softc *sc)
{
int s;
s = splserial();
/* Turn off interrupt */
bus_space_write_1(sc->sc_iot, sc->sc_ioh, UARTINTM, 0);
/* Clear any break condition set with TIOCSBRK. */
wmcom_break(sc, 0);
splx(s);
}
static void
wmcom_break(struct wmcom_softc *sc, int onoff)
{
int s;
uint8_t fcr;
s = splserial();
fcr = bus_space_read_1(sc->sc_iot, sc->sc_ioh, UARTFCR);
if (onoff)
SET(fcr, FCR_BREAK);
else
CLR(fcr, FCR_BREAK);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, UARTFCR, fcr);
splx(s);
}
static void
wmcom_rxsoft(struct wmcom_softc *sc, struct tty *tp)
{
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int code, s;
u_int cc, scc;
uint8_t intm;
u_char sts, *get;
get = sc->sc_rbget;
scc = cc = WMCOM_RING_SIZE - sc->sc_rbavail;
while (cc) {
code = get[0];
sts = get[1];
if (ISSET(sts, RSR_FE | RSR_PE | RSR_OE)) {
if (ISSET(sts, (RSR_FE)))
SET(code, TTY_FE);
if (ISSET(sts, RSR_PE))
SET(code, TTY_PE);
if (ISSET(sts, RSR_OE))
; /* XXXXX: Overrun */
}
if ((*tp->t_linesw->l_rint)(code, tp) == -1) {
/*
* The line discipline's buffer is out of space.
*/
/*
* We're either not using flow control, or the
* line discipline didn't tell us to block for
* some reason. Either way, we have no way to
* know when there's more space available, so
* just drop the rest of the data.
*/
get += cc << 1;
if (get >= sc->sc_rbuf + (WMCOM_RING_SIZE << 1))
get -= (WMCOM_RING_SIZE << 1);
cc = 0;
break;
}
get += 2;
if (get >= sc->sc_rbuf + (WMCOM_RING_SIZE << 1))
get = sc->sc_rbuf;
cc--;
}
if (cc != scc) {
sc->sc_rbget = get;
s = splserial();
cc = sc->sc_rbavail += scc - cc;
/* Buffers should be ok again, release possible block. */
if (cc >= 1) {
intm = bus_space_read_1(iot, ioh, UARTINTM);
SET(intm, INT_RXINT);
bus_space_write_1(iot, ioh, UARTINTM, intm);
}
splx(s);
}
}
static inline uint32_t
wmcom_rate2lcr(int rate)
{
return 7372800 / (16 * rate) - 1;
}
static uint8_t
wmcom_cflag2fcr(tcflag_t cflag)
{
int8_t fcr = FCR_UFIFOEN;
switch (cflag & CSIZE) {
case CS5: SET(fcr, FCR_WLEN_5); break;
case CS6: SET(fcr, FCR_WLEN_6); break;
case CS7: SET(fcr, FCR_WLEN_7); break;
case CS8: SET(fcr, FCR_WLEN_8); break;
default: SET(fcr, FCR_WLEN_8); break;
}
if (cflag & CSTOPB)
SET(fcr, FCR_XSTOP);
if (cflag & PARENB) {
SET(fcr, (FCR_PRTEN | FCR_EVENPRT));
if (cflag & PARODD)
CLR(fcr, FCR_EVENPRT);
}
return fcr;
}
#define WMCOM_CNREAD_1(offset) \
(*(volatile uint8_t *)(wmcom_cnaddr + ((offset) << 2)))
#define WMCOM_CNREAD_4(offset) \
(*(volatile uint32_t *)(wmcom_cnaddr + ((offset) << 2)))
#define WMCOM_CNWRITE_1(offset, val) \
(*(volatile uint8_t *)(wmcom_cnaddr + ((offset) << 2)) = val)
#define WMCOM_CNWRITE_4(offset, val) \
(*(volatile uint32_t *)(wmcom_cnaddr + ((offset) << 2)) = val)
static struct consdev wmcomcons = {
NULL, NULL, wmcom_cngetc, wmcom_cnputc, wmcom_cnpollc, NULL, NULL, NULL,
NODEV, CN_NORMAL
};
int
wmcom_cnattach(vaddr_t addr, int rate, tcflag_t cflag, int irda)
{
wmcom_cnaddr = addr;
wmcom_cnrate = rate;
wmcom_cncflag = cflag;
WMCOM_CNWRITE_4(UARTLCR, wmcom_rate2lcr(rate));
WMCOM_CNWRITE_1(UARTFCR, wmcom_cflag2fcr(cflag));
if (irda)
WMCOM_CNWRITE_1(UARTCON, CON_UARTEN | CON_IRTXM);
else
WMCOM_CNWRITE_1(UARTCON, CON_UARTEN);
cn_tab = &wmcomcons;
cn_init_magic(&wmcom_cnm_state);
cn_set_magic("\047\001"); /* default magic is BREAK */
return 0;
}
/* ARGSUSED */
static int
wmcom_cngetc(dev_t dev)
{
int s = splserial();
char ch;
while (WMCOM_CNREAD_1(UARTFR) & FR_RXFE);
ch = WMCOM_CNREAD_4(UARTDR);
{
#ifdef DDB
extern int db_active;
if (!db_active)
#endif
cn_check_magic(dev, ch, wmcom_cnm_state);
}
splx(s);
return ch;
}
/* ARGSUSED */
static void
wmcom_cnputc(dev_t dev, int c)
{
int s = splserial();
while (WMCOM_CNREAD_1(UARTFR) & FR_TXFF);
WMCOM_CNWRITE_1(UARTDR, c);
/* Make sure output. */
while (WMCOM_CNREAD_1(UARTFR) & FR_BUSY);
splx(s);
}
/* ARGSUSED */
static void
wmcom_cnpollc(dev_t dev, int on)
{
/* Nothing */
}