NetBSD-5.0.2/sys/arch/hpcmips/tx/txcom.c
/* $NetBSD: txcom.c,v 1.40 2008/06/12 16:50:53 tsutsui Exp $ */
/*-
* Copyright (c) 1999, 2000, 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by UCHIYAMA Yasushi.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
__KERNEL_RCSID(0, "$NetBSD: txcom.c,v 1.40 2008/06/12 16:50:53 tsutsui Exp $");
#include "opt_tx39uart_debug.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/kauth.h>
#include <sys/proc.h> /* tsleep/wakeup */
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/file.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <dev/cons.h> /* consdev */
#include <machine/bus.h>
#include <machine/config_hook.h>
#include <hpcmips/tx/tx39var.h>
#include <hpcmips/tx/tx39icureg.h>
#include <hpcmips/tx/tx39uartvar.h>
#include <hpcmips/tx/tx39uartreg.h>
#include <hpcmips/tx/tx39irvar.h>
#include <hpcmips/tx/tx39clockreg.h> /* XXX */
/*
* UARTA channel has DTR, DSR, RTS, CTS lines. and they wired to MFIO/IO port.
*/
#define IS_COM0(s) ((s) == 0)
#define IS_COM1(s) ((s) == 1)
#define ON ((void *)1)
#define OFF ((void *)0)
#ifdef TX39UART_DEBUG
#define DPRINTF_ENABLE
#define DPRINTF_DEBUG tx39uart_debug
#endif
#include <machine/debug.h>
#define TXCOM_HW_CONSOLE 0x40
#define TXCOM_RING_SIZE 256 /* must be a power of two! */
#define TXCOM_RING_MASK (TXCOM_RING_SIZE - 1)
struct txcom_chip {
tx_chipset_tag_t sc_tc;
int sc_slot; /* UARTA or UARTB */
int sc_cflag;
int sc_speed;
int sc_swflags;
int sc_hwflags;
int sc_dcd;
int sc_msr_cts;
int sc_tx_stopped;
};
struct txcom_softc {
struct device sc_dev;
struct tty *sc_tty;
struct txcom_chip *sc_chip;
struct callout sc_txsoft_ch;
struct callout sc_rxsoft_ch;
u_int8_t *sc_tba; /* transmit buffer address */
int sc_tbc; /* transmit byte count */
int sc_heldtbc;
u_int8_t *sc_rbuf; /* receive buffer address */
int sc_rbput; /* receive byte count */
int sc_rbget;
};
extern struct cfdriver txcom_cd;
int txcom_match(struct device *, struct cfdata *, void *);
void txcom_attach(struct device *, struct device *, void *);
int txcom_print(void*, const char *);
int txcom_txintr(void *);
int txcom_rxintr(void *);
int txcom_frameerr_intr(void *);
int txcom_parityerr_intr(void *);
int txcom_break_intr(void *);
void txcom_rxsoft(void *);
void txcom_txsoft(void *);
int txcom_stsoft(void *);
int txcom_stsoft2(void *);
int txcom_stsoft3(void *);
int txcom_stsoft4(void *);
void txcom_shutdown(struct txcom_softc *);
void txcom_break(struct txcom_softc *, int);
void txcom_modem(struct txcom_softc *, int);
void txcomstart(struct tty *);
int txcomparam(struct tty *, struct termios *);
void txcom_reset (struct txcom_chip *);
int txcom_enable (struct txcom_chip *, bool);
void txcom_disable (struct txcom_chip *);
void txcom_setmode (struct txcom_chip *);
void txcom_setbaudrate(struct txcom_chip *);
int txcom_cngetc (dev_t);
void txcom_cnputc (dev_t, int);
void txcom_cnpollc (dev_t, int);
int txcom_dcd_hook(void *, int, long, void *);
int txcom_cts_hook(void *, int, long, void *);
inline int __txcom_txbufready(struct txcom_chip *, int);
const char *__txcom_slotname(int);
#ifdef TX39UARTDEBUG
void txcom_dump(struct txcom_chip *);
#endif
struct consdev txcomcons = {
NULL, NULL, txcom_cngetc, txcom_cnputc, txcom_cnpollc, NULL, NULL,
NULL, NODEV, CN_NORMAL
};
/* Serial console */
struct txcom_chip txcom_chip;
CFATTACH_DECL(txcom, sizeof(struct txcom_softc),
txcom_match, txcom_attach, NULL, NULL);
dev_type_open(txcomopen);
dev_type_close(txcomclose);
dev_type_read(txcomread);
dev_type_write(txcomwrite);
dev_type_ioctl(txcomioctl);
dev_type_stop(txcomstop);
dev_type_tty(txcomtty);
dev_type_poll(txcompoll);
const struct cdevsw txcom_cdevsw = {
txcomopen, txcomclose, txcomread, txcomwrite, txcomioctl,
txcomstop, txcomtty, txcompoll, nommap, ttykqfilter, D_TTY
};
int
txcom_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
/* if the autoconfiguration got this far, there's a slot here */
return 1;
}
void
txcom_attach(struct device *parent, struct device *self, void *aux)
{
struct tx39uart_attach_args *ua = aux;
struct txcom_softc *sc = (void*)self;
tx_chipset_tag_t tc;
struct tty *tp;
struct txcom_chip *chip;
int slot, console;
/* Check this slot used as serial console */
console = (ua->ua_slot == txcom_chip.sc_slot) &&
(txcom_chip.sc_hwflags & TXCOM_HW_CONSOLE);
if (console) {
sc->sc_chip = &txcom_chip;
} else {
if (!(sc->sc_chip = malloc(sizeof(struct txcom_chip),
M_DEVBUF, M_WAITOK))) {
printf(": can't allocate chip\n");
return;
}
memset(sc->sc_chip, 0, sizeof(struct txcom_chip));
}
chip = sc->sc_chip;
tc = chip->sc_tc = ua->ua_tc;
slot = chip->sc_slot = ua->ua_slot;
#ifdef TX39UARTDEBUG
txcom_dump(chip);
#endif
if (!console)
txcom_reset(chip);
if (!(sc->sc_rbuf = malloc(TXCOM_RING_SIZE, M_DEVBUF, M_WAITOK))) {
printf(": can't allocate buffer.\n");
return;
}
memset(sc->sc_rbuf, 0, TXCOM_RING_SIZE);
tp = ttymalloc();
tp->t_oproc = txcomstart;
tp->t_param = txcomparam;
tp->t_hwiflow = NULL;
sc->sc_tty = tp;
tty_attach(tp);
if (ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
int maj;
/* locate the major number */
maj = cdevsw_lookup_major(&txcom_cdevsw);
cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev));
printf(": console");
}
printf("\n");
/*
* Enable interrupt
*/
#define TXCOMINTR(i, s) MAKEINTR(2, TX39_INTRSTATUS2_UART##i##INT(s))
tx_intr_establish(tc, TXCOMINTR(RX, slot), IST_EDGE, IPL_TTY,
txcom_rxintr, sc);
tx_intr_establish(tc, TXCOMINTR(TX, slot), IST_EDGE, IPL_TTY,
txcom_txintr, sc);
tx_intr_establish(tc, TXCOMINTR(RXOVERRUN, slot), IST_EDGE, IPL_TTY,
txcom_rxintr, sc);
tx_intr_establish(tc, TXCOMINTR(TXOVERRUN, slot), IST_EDGE, IPL_TTY,
txcom_txintr, sc);
tx_intr_establish(tc, TXCOMINTR(FRAMEERR, slot), IST_EDGE, IPL_TTY,
txcom_frameerr_intr, sc);
tx_intr_establish(tc, TXCOMINTR(PARITYERR, slot), IST_EDGE, IPL_TTY,
txcom_parityerr_intr, sc);
tx_intr_establish(tc, TXCOMINTR(BREAK, slot), IST_EDGE, IPL_TTY,
txcom_break_intr, sc);
/*
* UARTA has external signal line. (its wiring is platform dependent)
*/
if (IS_COM0(slot)) {
/* install DCD, CTS hooks. */
config_hook(CONFIG_HOOK_EVENT, CONFIG_HOOK_COM0_DCD,
CONFIG_HOOK_EXCLUSIVE, txcom_dcd_hook, sc);
config_hook(CONFIG_HOOK_EVENT, CONFIG_HOOK_COM0_CTS,
CONFIG_HOOK_EXCLUSIVE, txcom_cts_hook, sc);
}
/*
* UARTB can connect IR module
*/
if (IS_COM1(slot)) {
struct txcom_attach_args tca;
tca.tca_tc = tc;
tca.tca_parent = self;
config_found(self, &tca, txcom_print);
}
}
int
txcom_print(void *aux, const char *pnp)
{
return pnp ? QUIET : UNCONF;
}
void
txcom_reset(struct txcom_chip *chip)
{
tx_chipset_tag_t tc;
int slot, ofs;
txreg_t reg;
tc = chip->sc_tc;
slot = chip->sc_slot;
ofs = TX39_UARTCTRL1_REG(slot);
/* Supply clock */
reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG);
reg |= (slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK);
tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg);
/* reset UART module */
tx_conf_write(tc, ofs, 0);
}
int
txcom_enable(struct txcom_chip *chip, bool console)
{
tx_chipset_tag_t tc;
txreg_t reg;
int slot, ofs, timeout;
tc = chip->sc_tc;
slot = chip->sc_slot;
ofs = TX39_UARTCTRL1_REG(slot);
/*
* External power supply (if any)
* When serial console, Windows CE already powered on it.
*/
if (!console) {
config_hook_call(CONFIG_HOOK_POWERCONTROL,
CONFIG_HOOK_POWERCONTROL_COM0, PWCTL_ON);
delay(3);
}
/* Supply clock */
reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG);
reg |= (slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK);
tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg);
/*
* XXX Disable DMA (DMA not coded yet)
*/
reg = tx_conf_read(tc, ofs);
reg &= ~(TX39_UARTCTRL1_ENDMARX | TX39_UARTCTRL1_ENDMATX);
tx_conf_write(tc, ofs, reg);
/* enable */
reg = tx_conf_read(tc, ofs);
reg |= TX39_UARTCTRL1_ENUART;
reg &= ~TX39_UARTCTRL1_ENBREAHALT;
tx_conf_write(tc, ofs, reg);
timeout = 100000;
while(!(tx_conf_read(tc, ofs) & TX39_UARTCTRL1_UARTON) &&
--timeout > 0)
;
if (timeout == 0 && !cold) {
printf("%s never power up\n", __txcom_slotname(slot));
return 1;
}
return 0;
}
void
txcom_disable(struct txcom_chip *chip)
{
tx_chipset_tag_t tc;
txreg_t reg;
int slot;
tc = chip->sc_tc;
slot = chip->sc_slot;
reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot));
/* DMA */
reg &= ~(TX39_UARTCTRL1_ENDMARX | TX39_UARTCTRL1_ENDMATX);
/* disable module */
reg &= ~TX39_UARTCTRL1_ENUART;
tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg);
/* Clock */
reg = tx_conf_read(tc, TX39_CLOCKCTRL_REG);
reg &= ~(slot ? TX39_CLOCK_ENUARTBCLK : TX39_CLOCK_ENUARTACLK);
tx_conf_write(tc, TX39_CLOCKCTRL_REG, reg);
}
inline int
__txcom_txbufready(struct txcom_chip *chip, int retry)
{
tx_chipset_tag_t tc = chip->sc_tc;
int ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
do {
if (tx_conf_read(tc, ofs) & TX39_UARTCTRL1_EMPTY)
return 1;
} while(--retry != 0);
return 0;
}
void
txcom_pulse_mode(struct device *dev)
{
struct txcom_softc *sc = (void*)dev;
struct txcom_chip *chip = sc->sc_chip;
tx_chipset_tag_t tc = chip->sc_tc;
int ofs;
txreg_t reg;
ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
reg = tx_conf_read(tc, ofs);
/* WindowsCE use this setting */
reg |= TX39_UARTCTRL1_PULSEOPT1;
reg &= ~TX39_UARTCTRL1_PULSEOPT2;
reg |= TX39_UARTCTRL1_DTINVERT;
tx_conf_write(tc, ofs, reg);
}
/*
* console
*/
int
txcom_cngetc(dev_t dev)
{
tx_chipset_tag_t tc;
int ofs, c, s;
s = spltty();
tc = txcom_chip.sc_tc;
ofs = TX39_UARTCTRL1_REG(txcom_chip.sc_slot);
while(!(TX39_UARTCTRL1_RXHOLDFULL & tx_conf_read(tc, ofs)))
;
c = TX39_UARTRXHOLD_RXDATA(
tx_conf_read(tc, TX39_UARTRXHOLD_REG(txcom_chip.sc_slot)));
if (c == '\r')
c = '\n';
splx(s);
return c;
}
void
txcom_cnputc(dev_t dev, int c)
{
struct txcom_chip *chip = &txcom_chip;
tx_chipset_tag_t tc = chip->sc_tc;
int s;
s = spltty();
/* Wait for transmitter to empty */
__txcom_txbufready(chip, -1);
tx_conf_write(tc, TX39_UARTTXHOLD_REG(chip->sc_slot),
(c & TX39_UARTTXHOLD_TXDATA_MASK));
__txcom_txbufready(chip, -1);
splx(s);
}
void
txcom_cnpollc(dev_t dev, int on)
{
}
void
txcom_setmode(struct txcom_chip *chip)
{
tcflag_t cflag = chip->sc_cflag;
int ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
txreg_t reg;
reg = tx_conf_read(chip->sc_tc, ofs);
reg &= ~TX39_UARTCTRL1_ENUART;
tx_conf_write(chip->sc_tc, ofs, reg);
switch (ISSET(cflag, CSIZE)) {
default:
printf("txcom_setmode: CS7, CS8 only. use CS7");
/* FALL THROUGH */
case CS7:
reg |= TX39_UARTCTRL1_BIT7;
break;
case CS8:
reg &= ~TX39_UARTCTRL1_BIT7;
break;
}
if (ISSET(cflag, PARENB)) {
reg |= TX39_UARTCTRL1_ENPARITY;
if (ISSET(cflag, PARODD)) {
reg &= ~TX39_UARTCTRL1_EVENPARITY;
} else {
reg |= TX39_UARTCTRL1_EVENPARITY;
}
} else {
reg &= ~TX39_UARTCTRL1_ENPARITY;
}
if (ISSET(cflag, CSTOPB))
reg |= TX39_UARTCTRL1_TWOSTOP;
else
reg &= ~TX39_UARTCTRL1_TWOSTOP;
reg |= TX39_UARTCTRL1_ENUART;
tx_conf_write(chip->sc_tc, ofs, reg);
}
void
txcom_setbaudrate(struct txcom_chip *chip)
{
int baudrate;
int ofs = TX39_UARTCTRL1_REG(chip->sc_slot);
txreg_t reg, reg1;
if (chip->sc_speed == 0)
return;
if (!cold)
DPRINTF("%d\n", chip->sc_speed);
reg1 = tx_conf_read(chip->sc_tc, ofs);
reg1 &= ~TX39_UARTCTRL1_ENUART;
tx_conf_write(chip->sc_tc, ofs, reg1);
baudrate = TX39_UARTCLOCKHZ / (chip->sc_speed * 16) - 1;
reg = TX39_UARTCTRL2_BAUDRATE_SET(0, baudrate);
tx_conf_write(chip->sc_tc, TX39_UARTCTRL2_REG(chip->sc_slot), reg);
reg1 |= TX39_UARTCTRL1_ENUART;
tx_conf_write(chip->sc_tc, ofs, reg1);
}
int
txcom_cnattach(int slot, int speed, int cflag)
{
cn_tab = &txcomcons;
txcom_chip.sc_tc = tx_conf_get_tag();
txcom_chip.sc_slot = slot;
txcom_chip.sc_cflag = cflag;
txcom_chip.sc_speed = speed;
txcom_chip.sc_hwflags |= TXCOM_HW_CONSOLE;
#if notyet
txcom_reset(&txcom_chip);
#endif
txcom_setmode(&txcom_chip);
txcom_setbaudrate(&txcom_chip);
if (txcom_enable(&txcom_chip, true) != 0)
return 1;
return 0;
}
/*
* tty
*/
void
txcom_break(struct txcom_softc *sc, int on)
{
struct txcom_chip *chip = sc->sc_chip;
tx_conf_write(chip->sc_tc, TX39_UARTTXHOLD_REG(chip->sc_slot),
on ? TX39_UARTTXHOLD_BREAK : 0);
}
void
txcom_modem(struct txcom_softc *sc, int on)
{
struct txcom_chip *chip = sc->sc_chip;
tx_chipset_tag_t tc = chip->sc_tc;
int slot = chip->sc_slot;
txreg_t reg;
/* assert DTR */
if (IS_COM0(slot)) {
config_hook_call(CONFIG_HOOK_SET,
CONFIG_HOOK_COM0_DTR,
(void *)on);
}
reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot));
reg &= ~TX39_UARTCTRL1_ENUART;
tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg);
if (on) {
reg &= ~TX39_UARTCTRL1_DISTXD;
} else {
reg |= TX39_UARTCTRL1_DISTXD; /* low UARTTXD */
}
reg |= TX39_UARTCTRL1_ENUART;
tx_conf_write(tc, TX39_UARTCTRL1_REG(slot), reg);
}
void
txcom_shutdown(struct txcom_softc *sc)
{
struct tty *tp = sc->sc_tty;
int s = spltty();
/* Clear any break condition set with TIOCSBRK. */
txcom_break(sc, 0);
/*
* Hang up if necessary. Wait a bit, so the other side has time to
* notice even if we immediately open the port again.
*/
if (ISSET(tp->t_cflag, HUPCL)) {
txcom_modem(sc, 0);
(void) tsleep(sc, TTIPRI, ttclos, hz);
}
/* Turn off interrupts if not the console. */
if (!ISSET(sc->sc_chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
txcom_disable(sc->sc_chip);
}
splx(s);
}
const char *
__txcom_slotname(int slot)
{
static const char *slotname[] = {"UARTA", "UARTB", "unknown"};
if (slot != 0 && slot != 1)
return slotname[2];
return slotname[slot];
}
int
txcom_frameerr_intr(void *arg)
{
struct txcom_softc *sc = arg;
printf("%s frame error\n", __txcom_slotname(sc->sc_chip->sc_slot));
return 0;
}
int
txcom_parityerr_intr(void *arg)
{
struct txcom_softc *sc = arg;
printf("%s parity error\n", __txcom_slotname(sc->sc_chip->sc_slot));
return 0;
}
int
txcom_break_intr(void *arg)
{
struct txcom_softc *sc = arg;
printf("%s break\n", __txcom_slotname(sc->sc_chip->sc_slot));
return 0;
}
int
txcom_rxintr(void *arg)
{
struct txcom_softc *sc = arg;
struct txcom_chip *chip = sc->sc_chip;
u_int8_t c;
c = TX39_UARTRXHOLD_RXDATA(
tx_conf_read(chip->sc_tc,
TX39_UARTRXHOLD_REG(chip->sc_slot)));
sc->sc_rbuf[sc->sc_rbput] = c;
sc->sc_rbput = (sc->sc_rbput + 1) % TXCOM_RING_MASK;
callout_reset(&sc->sc_rxsoft_ch, 1, txcom_rxsoft, sc);
return 0;
}
void
txcom_rxsoft(void *arg)
{
struct txcom_softc *sc = arg;
struct tty *tp = sc->sc_tty;
int (*rint)(int, struct tty *);
int code;
int s, end, get;
rint = tp->t_linesw->l_rint;
s = spltty();
end = sc->sc_rbput;
get = sc->sc_rbget;
while (get != end) {
code = sc->sc_rbuf[get];
if ((*rint)(code, tp) == -1) {
/*
* The line discipline's buffer is out of space.
*/
}
get = (get + 1) % TXCOM_RING_MASK;
}
sc->sc_rbget = get;
splx(s);
}
int
txcom_txintr(void *arg)
{
struct txcom_softc *sc = arg;
struct txcom_chip *chip = sc->sc_chip;
tx_chipset_tag_t tc = chip->sc_tc;
if (sc->sc_tbc > 0) {
tx_conf_write(tc, TX39_UARTTXHOLD_REG(chip->sc_slot),
(*sc->sc_tba &
TX39_UARTTXHOLD_TXDATA_MASK));
sc->sc_tbc--;
sc->sc_tba++;
} else {
callout_reset(&sc->sc_rxsoft_ch, 1, txcom_txsoft, sc);
}
return 0;
}
void
txcom_txsoft(void *arg)
{
struct txcom_softc *sc = arg;
struct tty *tp = sc->sc_tty;
int s = spltty();
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);
splx(s);
}
int
txcomopen(dev_t dev, int flag, int mode, struct lwp *l)
{
struct txcom_softc *sc;
struct txcom_chip *chip;
struct tty *tp;
int s, err = ENXIO;
sc = device_lookup_private(&txcom_cd, minor(dev));
if (sc == NULL)
return err;
chip = sc->sc_chip;
tp = sc->sc_tty;
if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
return (EBUSY);
s = spltty();
if (txcom_enable(sc->sc_chip, false)) {
splx(s);
goto out;
}
/*
* 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;
t.c_ispeed = 0;
if (ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
t.c_ospeed = chip->sc_speed;
t.c_cflag = chip->sc_cflag;
} else {
t.c_ospeed = TTYDEF_SPEED;
t.c_cflag = TTYDEF_CFLAG;
}
if (ISSET(chip->sc_swflags, TIOCFLAG_CLOCAL))
SET(t.c_cflag, CLOCAL);
if (ISSET(chip->sc_swflags, TIOCFLAG_CRTSCTS))
SET(t.c_cflag, CRTSCTS);
if (ISSET(chip->sc_swflags, TIOCFLAG_MDMBUF))
SET(t.c_cflag, MDMBUF);
/* Make sure txcomparam() will do something. */
tp->t_ospeed = 0;
txcomparam(tp, &t);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
ttychars(tp);
ttsetwater(tp);
/*
* Turn on DTR. We must always do this, even if carrier is not
* present, because otherwise we'd have to use TIOCSDTR
* immediately after setting CLOCAL, which applications do not
* expect. We always assert DTR while the device is open
* unless explicitly requested to deassert it.
*/
txcom_modem(sc, 1);
/* Clear the input ring, and unblock. */
sc->sc_rbget = sc->sc_rbput = 0;
}
splx(s);
#define TXCOMDIALOUT(x) (minor(x) & 0x80000)
if ((err = ttyopen(tp, TXCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)))) {
DPRINTF("ttyopen failed\n");
goto out;
}
if ((err = (*tp->t_linesw->l_open)(dev, tp))) {
DPRINTF("line dicipline open failed\n");
goto out;
}
return err;
out:
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.
*/
txcom_shutdown(sc);
}
return err;
}
int
txcomclose(dev_t dev, int flag, int mode, struct lwp *l)
{
struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
struct tty *tp = sc->sc_tty;
/* XXX This is for cons.c. */
if (!ISSET(tp->t_state, TS_ISOPEN))
return 0;
(*tp->t_linesw->l_close)(tp, flag);
ttyclose(tp);
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.
*/
txcom_shutdown(sc);
}
return 0;
}
int
txcomread(dev_t dev, struct uio *uio, int flag)
{
struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
struct tty *tp = sc->sc_tty;
return ((*tp->t_linesw->l_read)(tp, uio, flag));
}
int
txcomwrite(dev_t dev, struct uio *uio, int flag)
{
struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
struct tty *tp = sc->sc_tty;
return ((*tp->t_linesw->l_write)(tp, uio, flag));
}
int
txcompoll(dev_t dev, int events, struct lwp *l)
{
struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
struct tty *tp = sc->sc_tty;
return ((*tp->t_linesw->l_poll)(tp, events, l));
}
struct tty *
txcomtty(dev_t dev)
{
struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
return sc->sc_tty;
}
int
txcomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
struct txcom_softc *sc = device_lookup_private(&txcom_cd, minor(dev));
struct tty *tp = sc->sc_tty;
int s, err;
err = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
if (err != EPASSTHROUGH) {
return err;
}
err = ttioctl(tp, cmd, data, flag, l);
if (err != EPASSTHROUGH) {
return err;
}
err = 0;
s = spltty();
switch (cmd) {
default:
err = EPASSTHROUGH;
break;
case TIOCSBRK:
txcom_break(sc, 1);
break;
case TIOCCBRK:
txcom_break(sc, 0);
break;
case TIOCSDTR:
txcom_modem(sc, 1);
break;
case TIOCCDTR:
txcom_modem(sc, 0);
break;
case TIOCGFLAGS:
*(int *)data = sc->sc_chip->sc_swflags;
break;
case TIOCSFLAGS:
err = kauth_authorize_device_tty(l->l_cred,
KAUTH_DEVICE_TTY_PRIVSET, tp);
if (err) {
break;
}
sc->sc_chip->sc_swflags = *(int *)data;
break;
}
splx(s);
return err;
}
void
txcomstop(struct tty *tp, int flag)
{
struct txcom_softc *sc;
int s;
sc = device_lookup_private(&txcom_cd, minor(tp->t_dev));
s = spltty();
if (ISSET(tp->t_state, TS_BUSY)) {
/* Stop transmitting at the next chunk. */
sc->sc_tbc = 0;
sc->sc_heldtbc = 0;
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
}
splx(s);
}
void
txcomstart(struct tty *tp)
{
struct txcom_softc *sc;
struct txcom_chip *chip;
tx_chipset_tag_t tc;
int slot;
int s;
sc = device_lookup_private(&txcom_cd, minor(tp->t_dev));
chip = sc->sc_chip;
tc = chip->sc_tc;
slot = chip->sc_slot;
s = spltty();
if (!__txcom_txbufready(chip, 0) ||
ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
goto out;
if (!ttypull(tp))
goto out;
sc->sc_tba = tp->t_outq.c_cf;
sc->sc_tbc = ndqb(&tp->t_outq, 0);
SET(tp->t_state, TS_BUSY);
/* Output the first character of the contiguous buffer. */
tx_conf_write(tc, TX39_UARTTXHOLD_REG(slot),
(*sc->sc_tba & TX39_UARTTXHOLD_TXDATA_MASK));
sc->sc_tbc--;
sc->sc_tba++;
out:
splx(s);
}
/*
* Set TXcom tty parameters from termios.
*/
int
txcomparam(struct tty *tp, struct termios *t)
{
struct txcom_softc *sc;
struct txcom_chip *chip;
int ospeed;
int s;
sc = device_lookup_private(&txcom_cd, minor(tp->t_dev));
if (sc == NULL)
return ENXIO;
ospeed = t->c_ospeed;
/* Check requested parameters. */
if (ospeed < 0) {
return EINVAL;
}
if (t->c_ispeed && t->c_ispeed != ospeed) {
return EINVAL;
}
s = spltty();
chip = sc->sc_chip;
/*
* For the console, always force CLOCAL and !HUPCL, so that the port
* is always active.
*/
if (ISSET(chip->sc_swflags, TIOCFLAG_SOFTCAR) ||
ISSET(chip->sc_hwflags, TXCOM_HW_CONSOLE)) {
SET(t->c_cflag, CLOCAL);
CLR(t->c_cflag, HUPCL);
}
splx(s);
/*
* If we're not in a mode that assumes a connection is present, then
* ignore carrier changes.
*/
if (ISSET(t->c_cflag, CLOCAL | MDMBUF))
chip->sc_dcd = 0;
else
chip->sc_dcd = 1;
/*
* Only whack the UART when params change.
* Some callers need to clear tp->t_ospeed
* to make sure initialization gets done.
*/
if (tp->t_ospeed == ospeed && tp->t_cflag == t->c_cflag) {
return 0;
}
s = spltty();
chip = sc->sc_chip;
chip->sc_speed = ospeed;
chip->sc_cflag = t->c_cflag;
txcom_setmode(chip);
txcom_setbaudrate(chip);
/* And copy to tty. */
tp->t_ispeed = 0;
tp->t_ospeed = chip->sc_speed;
tp->t_cflag = chip->sc_cflag;
/*
* Update the tty layer's idea of the carrier bit, in case we changed
* CLOCAL or MDMBUF. We don't hang up here; we only do that by
* explicit request.
*/
(void) (*tp->t_linesw->l_modem)(tp, chip->sc_dcd);
/*
* If hardware flow control is disabled, unblock any hard flow
* control state.
*/
if (!ISSET(chip->sc_cflag, CHWFLOW)) {
txcomstart(tp);
}
splx(s);
return 0;
}
int
txcom_dcd_hook(void *arg, int type, long id, void *msg)
{
struct txcom_softc *sc = arg;
struct tty *tp = sc->sc_tty;
struct txcom_chip *chip = sc->sc_chip;
int modem = !(int)msg; /* p-edge 1, n-edge 0 */
DPRINTF("DCD %s\n", modem ? "ON" : "OFF");
if (modem && chip->sc_dcd)
(void) (*tp->t_linesw->l_modem)(tp, chip->sc_dcd);
return 0;
}
int
txcom_cts_hook(void *arg, int type, long id, void *msg)
{
struct txcom_softc *sc = arg;
struct tty *tp = sc->sc_tty;
struct txcom_chip *chip = sc->sc_chip;
int clear = !(int)msg; /* p-edge 1, n-edge 0 */
DPRINTF("CTS %s\n", clear ? "ON" : "OFF");
if (chip->sc_msr_cts) {
if (!clear) {
chip->sc_tx_stopped = 1;
} else {
chip->sc_tx_stopped = 0;
(*tp->t_linesw->l_start)(tp);
}
}
return 0;
}
#ifdef TX39UARTDEBUG
void
txcom_dump(struct txcom_chip *chip)
{
tx_chipset_tag_t tc = chip->sc_tc;
int slot = chip->sc_slot;
txreg_t reg;
reg = tx_conf_read(tc, TX39_UARTCTRL1_REG(slot));
#define ISSETPRINT(r, m) \
dbg_bitmask_print(r, TX39_UARTCTRL1_##m, #m)
ISSETPRINT(reg, UARTON);
ISSETPRINT(reg, EMPTY);
ISSETPRINT(reg, PRXHOLDFULL);
ISSETPRINT(reg, RXHOLDFULL);
ISSETPRINT(reg, ENDMARX);
ISSETPRINT(reg, ENDMATX);
ISSETPRINT(reg, TESTMODE);
ISSETPRINT(reg, ENBREAHALT);
ISSETPRINT(reg, ENDMATEST);
ISSETPRINT(reg, ENDMALOOP);
ISSETPRINT(reg, PULSEOPT2);
ISSETPRINT(reg, PULSEOPT1);
ISSETPRINT(reg, DTINVERT);
ISSETPRINT(reg, DISTXD);
ISSETPRINT(reg, TWOSTOP);
ISSETPRINT(reg, LOOPBACK);
ISSETPRINT(reg, BIT7);
ISSETPRINT(reg, EVENPARITY);
ISSETPRINT(reg, ENPARITY);
ISSETPRINT(reg, ENUART);
}
#endif /* TX39UARTDEBUG */