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NetBSD/sys/dev/ic/cy.c
thorpej 16c4c5af26 New bus.h implementation/interface: 
- No more distinction between i/o-mapped and memory-mapped
	  devices.  It's all "bus space" now, and space tags
	  differentiate the space with finer grain than the
	  bus chipset tag.
	- Add memory barrier methods.
	- Implement space alloc/free methods.
	- Implement region read/write methods (like memcpy to/from
	  bus space).
This interface provides a better abstraction for dealing with
machine-independent chipset drivers.
1996-10-21 22:24:37 +00:00

1390 lines
32 KiB
C
Raw Blame History

/* $NetBSD: cy.c,v 1.5 1996/10/21 22:34:15 thorpej Exp $ */
/*
* cy.c
*
* Driver for Cyclades Cyclom-8/16/32 multiport serial cards
* (currently not tested with Cyclom-32 cards)
*
* Timo Rossi, 1996
*
* Supports both ISA and PCI Cyclom cards
*
* Uses CD1400 automatic CTS flow control, and
* if CY_HW_RTS is defined, uses CD1400 automatic input flow control.
* This requires a special cable that exchanges the RTS and DTR lines.
*
* Lots of debug output can be enabled by defining CY_DEBUG
* Some debugging counters (number of receive/transmit interrupts etc.)
* can be enabled by defining CY_DEBUG1
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/fcntl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/user.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <dev/ic/cd1400reg.h>
#include <dev/ic/cyreg.h>
#include <dev/ic/cyvar.h>
/* Macros to clear/set/test flags. */
#define SET(t, f) (t) |= (f)
#define CLR(t, f) (t) &= ~(f)
#define ISSET(t, f) ((t) & (f))
static int cyparam __P((struct tty *, struct termios *));
static void cystart __P((struct tty *));
static void cy_poll __P((void *));
static int cy_modem_control __P((struct cy_softc *,
struct cy_port *, int, int));
static void cy_enable_transmitter __P((struct cy_softc *, struct cy_port *));
static void cd1400_channel_cmd __P((struct cy_softc *, struct cy_port *, int));
static int cy_speed __P((speed_t, int *, int *));
struct cfdriver cy_cd = {
NULL, "cy", DV_TTY
};
static int cy_open = 0;
static int cy_events = 0;
cdev_decl(cy);
/*
* Common probe routine
*/
int
cy_find(sc)
struct cy_softc *sc;
{
int cy_chip, chip;
u_char firmware_ver;
bus_space_tag_t tag = sc->sc_memt;
bus_space_handle_t bsh = sc->sc_bsh;
int bustype = sc->sc_bustype;
/* Cyclom card hardware reset */
bus_space_write_1(tag, bsh, CY16_RESET << bustype, 0);
DELAY(500); /* wait for reset to complete */
bus_space_write_1(tag, bsh, CY_CLEAR_INTR << bustype, 0);
#ifdef CY_DEBUG
printf("cy: card reset done\n");
#endif
sc->sc_nchips = 0;
for (cy_chip = 0, chip = 0; cy_chip < CY_MAX_CD1400s;
cy_chip++, chip += (CY_CD1400_MEMSPACING << bustype)) {
int i;
/*
* the last 4 nchips are 'interleaved' with the first 4 on
* 32-port boards
*/
if (cy_chip == 4)
chip -= (CY32_ADDR_FIX << bustype);
#ifdef CY_DEBUG
printf("%s probe chip %d offset 0x%lx ... ",
sc->sc_dev.dv_xname, cy_chip, chip);
#endif
/* wait until the chip is ready for command */
DELAY(1000);
if (bus_space_read_1(tag, bsh, chip +
((CD1400_CCR << 1) << bustype)) != 0) {
#ifdef CY_DEBUG
printf("not ready for command\n");
#endif
break;
}
/* clear the firmware version reg. */
bus_space_write_1(tag, bsh, chip +
((CD1400_GFRCR << 1) << bustype), 0);
/*
* On Cyclom-16 references to non-existent chip 4
* actually access chip 0 (address line 9 not decoded).
* Here we check if the clearing of chip 4 GFRCR actually
* cleared chip 0 GFRCR. In that case we have a 16 port card.
*/
if (cy_chip == 4 &&
bus_space_read_1(tag, bsh, chip +
((CD1400_GFRCR << 1) << bustype)) == 0)
break;
/* reset the chip */
bus_space_write_1(tag, bsh, chip +
((CD1400_CCR << 1) << bustype),
CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET);
/* wait for the chip to initialize itself */
for (i = 0; i < 200; i++) {
DELAY(50);
firmware_ver = bus_space_read_1(tag, bsh, chip +
((CD1400_GFRCR << 1) << bustype));
if ((firmware_ver & 0xf0) == 0x40) /* found a CD1400 */
break;
}
#ifdef CY_DEBUG
printf("firmware version 0x%x\n", firmware_ver);
#endif
if ((firmware_ver & 0xf0) != 0x40)
break;
/* firmware version OK, CD1400 found */
sc->sc_nchips++;
}
if (sc->sc_nchips == 0) {
#ifdef CY_DEBUG
printf("no CD1400s found\n");
#endif
return 0;
}
#ifdef CY_DEBUG
printf("found %d CD1400s\n", sc->sc_nchips);
#endif
return 1;
}
void
cy_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
int port, cy_chip, num_chips, cdu, chip;
struct cy_softc *sc = (void *) self;
num_chips = sc->sc_nchips;
if (num_chips == 0)
return;
bzero(sc->sc_ports, sizeof(sc->sc_ports));
port = 0;
for (cy_chip = 0, chip = 0; cy_chip < num_chips; cy_chip++,
chip += (CY_CD1400_MEMSPACING << sc->sc_bustype)) {
if (cy_chip == 4)
chip -= (CY32_ADDR_FIX << sc->sc_bustype);
#ifdef CY_DEBUG
printf("attach CD1400 #%d offset 0x%x\n", cy_chip, chip);
#endif
sc->sc_cd1400_offs[cy_chip] = chip;
/*
* configure port 0 as serial port (should already be after
* reset)
*/
cd_write_reg(sc, cy_chip, CD1400_GCR, 0);
/* set up a receive timeout period (1ms) */
cd_write_reg(sc, cy_chip, CD1400_PPR,
(CY_CLOCK / CD1400_PPR_PRESCALER / 1000) + 1);
for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; cdu++) {
sc->sc_ports[port].cy_port_num = port;
sc->sc_ports[port].cy_chip = chip;
/* should we initialize anything else here? */
port++;
} /* for(each port on one CD1400...) */
} /* for(each CD1400 on a card... ) */
printf(" (%d ports)\n", port);
/* ensure an edge for the next interrupt */
bus_space_write_1(sc->sc_memt, sc->sc_bsh,
CY_CLEAR_INTR << sc->sc_bustype, 0);
}
/*
* open routine. returns zero if successfull, else error code
*/
int
cyopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int card = CY_CARD(dev);
int port = CY_PORT(dev);
struct cy_softc *sc;
struct cy_port *cy;
struct tty *tp;
int s, error;
#ifdef CY_DEBUG
printf("cy%d open port %d flag 0x%x mode 0x%x\n",
card, port, flag, mode);
#endif
if (card >= cy_cd.cd_ndevs || (sc = cy_cd.cd_devs[card]) == NULL)
return ENXIO;
cy = &sc->sc_ports[port];
s = spltty();
if (cy->cy_tty == NULL) {
if ((cy->cy_tty = ttymalloc()) == NULL) {
splx(s);
printf("cy%d: port %d: can't allocate tty\n",
card, port);
return ENOMEM;
}
tty_attach(cy->cy_tty);
}
splx(s);
tp = cy->cy_tty;
tp->t_oproc = cystart;
tp->t_param = cyparam;
tp->t_dev = dev;
if (!ISSET(tp->t_state, TS_ISOPEN)) {
SET(tp->t_state, TS_WOPEN);
ttychars(tp);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_cflag = TTYDEF_CFLAG;
if (ISSET(cy->cy_openflags, TIOCFLAG_CLOCAL))
SET(tp->t_cflag, CLOCAL);
if (ISSET(cy->cy_openflags, TIOCFLAG_CRTSCTS))
SET(tp->t_cflag, CRTSCTS);
if (ISSET(cy->cy_openflags, TIOCFLAG_MDMBUF))
SET(tp->t_cflag, MDMBUF);
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
s = spltty();
/*
* Allocate input ring buffer if we don't already have one
*/
if (cy->cy_ibuf == NULL) {
cy->cy_ibuf = malloc(CY_IBUF_SIZE, M_DEVBUF, M_NOWAIT);
if (cy->cy_ibuf == NULL) {
printf("%s: port %d: can't allocate input buffer\n",
sc->sc_dev.dv_xname, port);
splx(s);
return ENOMEM;
}
cy->cy_ibuf_end = cy->cy_ibuf + CY_IBUF_SIZE;
}
/* mark the ring buffer as empty */
cy->cy_ibuf_rd_ptr = cy->cy_ibuf_wr_ptr = cy->cy_ibuf;
/* select CD1400 channel */
cd_write_reg(sc, cy->cy_chip, CD1400_CAR,
port & CD1400_CAR_CHAN);
/* reset the channel */
cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDRESET);
/* encode unit (port) number in LIVR */
/* there is just enough space for 5 bits (32 ports) */
cd_write_reg(sc, cy->cy_chip, CD1400_LIVR, port << 3);
cy->cy_channel_control = 0;
/* hmm... need spltty() here? */
if (cy_open == 0) {
cy_open = 1;
timeout(cy_poll, NULL, 1);
}
/* this sets parameters and raises DTR */
cyparam(tp, &tp->t_termios);
ttsetwater(tp);
/* raise RTS too */
cy_modem_control(sc, cy, TIOCM_RTS, DMBIS);
cy->cy_carrier_stat =
cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2);
/* enable receiver and modem change interrupts */
cd_write_reg(sc, cy->cy_chip, CD1400_SRER,
CD1400_SRER_MDMCH | CD1400_SRER_RXDATA);
if (CY_DIALOUT(dev) ||
ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR) ||
ISSET(tp->t_cflag, MDMBUF) ||
ISSET(cy->cy_carrier_stat, CD1400_MSVR2_CD))
SET(tp->t_state, TS_CARR_ON);
else
CLR(tp->t_state, TS_CARR_ON);
} else if (ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) {
return EBUSY;
} else {
s = spltty();
}
/* wait for carrier if necessary */
if (!ISSET(flag, O_NONBLOCK)) {
while (!ISSET(tp->t_cflag, CLOCAL) &&
!ISSET(tp->t_state, TS_CARR_ON)) {
SET(tp->t_state, TS_WOPEN);
error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH,
"cydcd", 0);
if (error != 0) {
splx(s);
return error;
}
}
}
splx(s);
return (*linesw[tp->t_line].l_open) (dev, tp);
}
/*
* close routine. returns zero if successfull, else error code
*/
int
cyclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int card = CY_CARD(dev);
int port = CY_PORT(dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
struct tty *tp = cy->cy_tty;
int s;
#ifdef CY_DEBUG
printf("%s: close port %d, flag 0x%x, mode 0x%x\n",
sc->sc_dev.dv_xname, port, flag, mode);
#endif
(*linesw[tp->t_line].l_close) (tp, flag);
s = spltty();
if (ISSET(tp->t_cflag, HUPCL) &&
!ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR)) {
/*
* drop DTR and RTS (should we wait for output buffer to
* become empty first?)
*/
cy_modem_control(sc, cy, 0, DMSET);
}
/*
* XXX should we disable modem change and
* receive interrupts here or somewhere ?
*/
CLR(tp->t_state, TS_BUSY | TS_FLUSH);
splx(s);
ttyclose(tp);
return 0;
}
/*
* Read routine
*/
int
cyread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int card = CY_CARD(dev);
int port = CY_PORT(dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
struct tty *tp = cy->cy_tty;
#ifdef CY_DEBUG
printf("%s: read port %d uio 0x%x flag 0x%x\n",
sc->sc_dev.dv_xname, port, uio, flag);
#endif
return ((*linesw[tp->t_line].l_read) (tp, uio, flag));
}
/*
* Write routine
*/
int
cywrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
int card = CY_CARD(dev);
int port = CY_PORT(dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
struct tty *tp = cy->cy_tty;
#ifdef CY_DEBUG
printf("%s: write port %d uio 0x%x flag 0x%x\n",
sc->sc_dev.dv_xname, port, uio, flag);
#endif
return ((*linesw[tp->t_line].l_write) (tp, uio, flag));
}
/*
* return tty pointer
*/
struct tty *
cytty(dev)
dev_t dev;
{
int card = CY_CARD(dev);
int port = CY_PORT(dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
struct tty *tp = cy->cy_tty;
#ifdef CY_DEBUG
printf("%s: tty port %d tp 0x%x\n", sc->sc_dev.dv_xname, port, tp);
#endif
return tp;
}
/*
* ioctl routine
*/
int
cyioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int card = CY_CARD(dev);
int port = CY_PORT(dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
struct tty *tp = cy->cy_tty;
int error;
#ifdef CY_DEBUG
printf("%s: port %d ioctl cmd 0x%x data 0x%x flag 0x%x\n",
sc->sc_dev.dv_xname, port, cmd, data, flag);
#endif
error = (*linesw[tp->t_line].l_ioctl) (tp, cmd, data, flag, p);
if (error >= 0)
return error;
error = ttioctl(tp, cmd, data, flag, p);
if (error >= 0)
return error;
/* XXX should not allow dropping DTR when dialin? */
switch (cmd) {
case TIOCSBRK: /* start break */
SET(cy->cy_flags, CY_F_START_BREAK);
cy_enable_transmitter(sc, cy);
break;
case TIOCCBRK: /* stop break */
SET(cy->cy_flags, CY_F_END_BREAK);
cy_enable_transmitter(sc, cy);
break;
case TIOCSDTR: /* DTR on */
cy_modem_control(sc, cy, TIOCM_DTR, DMBIS);
break;
case TIOCCDTR: /* DTR off */
cy_modem_control(sc, cy, TIOCM_DTR, DMBIC);
break;
case TIOCMSET: /* set new modem control line values */
cy_modem_control(sc, cy, *((int *) data), DMSET);
break;
case TIOCMBIS: /* turn modem control bits on */
cy_modem_control(sc, cy, *((int *) data), DMBIS);
break;
case TIOCMBIC: /* turn modem control bits off */
cy_modem_control(sc, cy, *((int *) data), DMBIC);
break;
case TIOCMGET: /* get modem control/status line state */
*((int *) data) = cy_modem_control(sc, cy, 0, DMGET);
break;
case TIOCGFLAGS:
*((int *) data) = cy->cy_openflags |
(CY_DIALOUT(dev) ? TIOCFLAG_SOFTCAR : 0);
break;
case TIOCSFLAGS:
error = suser(p->p_ucred, &p->p_acflag);
if (error != 0)
return EPERM;
cy->cy_openflags = *((int *) data) &
(TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL |
TIOCFLAG_CRTSCTS | TIOCFLAG_MDMBUF);
break;
default:
return ENOTTY;
}
return 0;
}
/*
* start output
*/
void
cystart(tp)
struct tty *tp;
{
int card = CY_CARD(tp->t_dev);
int port = CY_PORT(tp->t_dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
int s;
#ifdef CY_DEBUG
printf("%s: port %d start, tty 0x%x\n", sc->sc_dev.dv_xname, port, tp);
#endif
s = spltty();
#ifdef CY_DEBUG1
cy->cy_start_count++;
#endif
if (!ISSET(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY)) {
if (tp->t_outq.c_cc <= tp->t_lowat) {
if (ISSET(tp->t_state, TS_ASLEEP)) {
CLR(tp->t_state, TS_ASLEEP);
wakeup(&tp->t_outq);
}
selwakeup(&tp->t_wsel);
if (tp->t_outq.c_cc == 0)
goto out;
}
SET(tp->t_state, TS_BUSY);
cy_enable_transmitter(sc, cy);
}
out:
splx(s);
}
/*
* stop output
*/
void
cystop(tp, flag)
struct tty *tp;
int flag;
{
int card = CY_CARD(tp->t_dev);
int port = CY_PORT(tp->t_dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
int s;
#ifdef CY_DEBUG
printf("%s: port %d stop tty 0x%x flag 0x%x\n",
sc->sc_dev.dv_xname, port, tp, flag);
#endif
s = spltty();
if (ISSET(tp->t_state, TS_BUSY)) {
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
/*
* the transmit interrupt routine will disable transmit when it
* notices that CY_F_STOP has been set.
*/
SET(cy->cy_flags, CY_F_STOP);
}
splx(s);
}
/*
* parameter setting routine.
* returns 0 if successfull, else returns error code
*/
static int
cyparam(tp, t)
struct tty *tp;
struct termios *t;
{
int card = CY_CARD(tp->t_dev);
int port = CY_PORT(tp->t_dev);
struct cy_softc *sc = cy_cd.cd_devs[card];
struct cy_port *cy = &sc->sc_ports[port];
int ibpr, obpr, i_clk_opt, o_clk_opt;
int s, opt;
#ifdef CY_DEBUG
printf("%s: port %d param tty 0x%x termios 0x%x\n",
sc->sc_dev.dv_xname, port, tp, t);
printf("ispeed %d ospeed %d\n", t->c_ispeed, t->c_ospeed);
#endif
if (t->c_ospeed != 0 && cy_speed(t->c_ospeed, &o_clk_opt, &obpr) < 0)
return EINVAL;
if (t->c_ispeed != 0 && cy_speed(t->c_ispeed, &i_clk_opt, &ibpr) < 0)
return EINVAL;
s = spltty();
/* hang up the line is ospeed is zero, else turn DTR on */
cy_modem_control(sc, cy, TIOCM_DTR, (t->c_ospeed == 0 ? DMBIC : DMBIS));
/* channel was selected by the above call to cy_modem_control() */
#if 0
cd_write_reg(sc, cy->cy_chip, CD1400_CAR, port & CD1400_CAR_CHAN);
#endif
/* set transmit speed */
if (t->c_ospeed != 0) {
cd_write_reg(sc, cy->cy_chip, CD1400_TCOR, o_clk_opt);
cd_write_reg(sc, cy->cy_chip, CD1400_TBPR, obpr);
}
/* set receive speed */
if (t->c_ispeed != 0) {
cd_write_reg(sc, cy->cy_chip, CD1400_RCOR, i_clk_opt);
cd_write_reg(sc, cy->cy_chip, CD1400_RBPR, ibpr);
}
opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN
| (ISSET(t->c_cflag, CREAD) ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS);
if (opt != cy->cy_channel_control) {
cy->cy_channel_control = opt;
cd1400_channel_cmd(sc, cy, opt);
}
/* compute COR1 contents */
opt = 0;
if (ISSET(t->c_cflag, PARENB)) {
if (ISSET(t->c_cflag, PARODD))
opt |= CD1400_COR1_PARODD;
opt |= CD1400_COR1_PARNORMAL;
}
if (!ISSET(t->c_iflag, INPCK))
opt |= CD1400_COR1_NOINPCK; /* no parity checking */
if (ISSET(t->c_cflag, CSTOPB))
opt |= CD1400_COR1_STOP2;
switch (t->c_cflag & CSIZE) {
case CS5:
opt |= CD1400_COR1_CS5;
break;
case CS6:
opt |= CD1400_COR1_CS6;
break;
case CS7:
opt |= CD1400_COR1_CS7;
break;
default:
opt |= CD1400_COR1_CS8;
break;
}
cd_write_reg(sc, cy->cy_chip, CD1400_COR1, opt);
#ifdef CY_DEBUG
printf("cor1 = 0x%x...", opt);
#endif
/*
* use the CD1400 automatic CTS flow control if CRTSCTS is set
*
* CD1400_COR2_ETC is used because breaks are generated with
* embedded transmit commands
*/
cd_write_reg(sc, cy->cy_chip, CD1400_COR2,
CD1400_COR2_ETC |
(ISSET(t->c_cflag, CRTSCTS) ? CD1400_COR2_CCTS_OFLOW : 0));
cd_write_reg(sc, cy->cy_chip, CD1400_COR3, CY_RX_FIFO_THRESHOLD);
cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDCORCHG |
CD1400_CCR_COR1 | CD1400_CCR_COR2 | CD1400_CCR_COR3);
cd_write_reg(sc, cy->cy_chip, CD1400_COR4, CD1400_COR4_PFO_EXCEPTION);
cd_write_reg(sc, cy->cy_chip, CD1400_COR5, 0);
/*
* set modem change option registers to generate interrupts
* on carrier detect changes.
*
* if hardware RTS handshaking is used (CY_HW_RTS, DTR and RTS lines
* exchanged), also set the handshaking threshold.
*/
#ifdef CY_HW_RTS
cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd |
(ISSET(t->c_cflag, CRTSCTS) ? RX_DTR_THRESHOLD : 0));
#else
cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd);
#endif /* CY_HW_RTS */
cd_write_reg(sc, cy->cy_chip, CD1400_MCOR2, CD1400_MCOR2_CDod);
/*
* set receive timeout to approx. 2ms
* could use more complex logic here...
* (but is it actually needed or even useful?)
*/
cd_write_reg(sc, cy->cy_chip, CD1400_RTPR, 2);
/*
* should do anything else here?
* XXX check MDMBUF handshaking like in com.c?
*/
splx(s);
return 0;
}
/*
* set/get modem line status
*
* bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR
*
* RTS and DTR are exchanged if CY_HW_RTS is set
*
*/
static int
cy_modem_control(sc, cy, bits, howto)
struct cy_softc *sc;
struct cy_port *cy;
int bits;
int howto;
{
int s, msvr;
struct tty *tp = cy->cy_tty;
s = spltty();
/* select channel */
cd_write_reg(sc, cy->cy_chip, CD1400_CAR,
cy->cy_port_num & CD1400_CAR_CHAN);
/* does not manipulate RTS if it is used for flow control */
switch (howto) {
case DMGET:
splx(s);
bits = 0;
if (cy->cy_channel_control & CD1400_CCR_RCVEN)
bits |= TIOCM_LE;
msvr = cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2);
#ifdef CY_HW_RTS
if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) &
CD1400_MSVR1_RTS)
bits |= TIOCM_DTR;
if (msvr & CD1400_MSVR2_DTR)
bits |= TIOCM_RTS;
#else
if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) &
CD1400_MSVR1_RTS)
bits |= TIOCM_RTS;
if (msvr & CD1400_MSVR2_DTR)
bits |= TIOCM_DTR;
#endif /* CY_HW_RTS */
if (msvr & CD1400_MSVR2_CTS)
bits |= TIOCM_CTS;
if (msvr & CD1400_MSVR2_CD)
bits |= TIOCM_CD;
if (msvr & CD1400_MSVR2_DSR) /* not connected on some
* Cyclom cards? */
bits |= TIOCM_DSR;
if (msvr & CD1400_MSVR2_RI) /* not connected on Cyclom-8Y
* cards? */
bits |= TIOCM_RI;
splx(s);
return bits;
case DMSET: /* replace old values with new ones */
#ifdef CY_HW_RTS
if (!ISSET(tp->>t_cflag, CRTSCTS))
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2,
((bits & TIOCM_RTS) ? CD1400_MSVR2_DTR : 0));
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1,
((bits & TIOCM_DTR) ? CD1400_MSVR1_RTS : 0));
#else
if (!ISSET(tp->t_cflag, CRTSCTS))
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1,
((bits & TIOCM_RTS) ? CD1400_MSVR1_RTS : 0));
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2,
((bits & TIOCM_DTR) ? CD1400_MSVR2_DTR : 0));
#endif /* CY_HW_RTS */
break;
case DMBIS: /* set bits */
#ifdef CY_HW_RTS
if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0)
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2,
CD1400_MSVR2_DTR);
if (bits & TIOCM_DTR)
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1,
CD1400_MSVR1_RTS);
#else
if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0)
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1,
CD1400_MSVR1_RTS);
if (bits & TIOCM_DTR)
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2,
CD1400_MSVR2_DTR);
#endif /* CY_HW_RTS */
break;
case DMBIC: /* clear bits */
#ifdef CY_HW_RTS
if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS))
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0);
if (bits & TIOCM_DTR)
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0);
#else
if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS))
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0);
if (bits & TIOCM_DTR)
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0);
#endif /* CY_HW_RTS */
break;
}
splx(s);
return 0;
}
/*
* Upper-level handler loop (called from timer interrupt?)
* This routine is common for multiple cards
*/
static void
cy_poll(arg)
void *arg;
{
int card, port;
struct cy_softc *sc;
struct cy_port *cy;
struct tty *tp;
static int counter = 0;
#ifdef CY_DEBUG1
int did_something;
#endif
int s = spltty();
if (cy_events == 0 && ++counter < 200) {
splx(s);
goto out;
}
cy_events = 0;
splx(s);
for (card = 0; card < cy_cd.cd_ndevs; card++) {
sc = cy_cd.cd_devs[card];
if (sc == NULL)
continue;
#ifdef CY_DEBUG1
sc->sc_poll_count1++;
did_something = 0;
#endif
for (port = 0; port < sc->sc_nchips * CD1400_NO_OF_CHANNELS;
port++) {
cy = &sc->sc_ports[port];
if ((tp = cy->cy_tty) == NULL || cy->cy_ibuf == NULL ||
!ISSET(tp->t_state, TS_ISOPEN | TS_WOPEN))
continue;
/*
* handle received data
*/
while (cy->cy_ibuf_rd_ptr != cy->cy_ibuf_wr_ptr) {
u_char line_stat;
int chr;
line_stat = cy->cy_ibuf_rd_ptr[0];
chr = cy->cy_ibuf_rd_ptr[1];
if (line_stat &
(CD1400_RDSR_BREAK | CD1400_RDSR_FE))
chr |= TTY_FE;
if (line_stat & CD1400_RDSR_PE)
chr |= TTY_PE;
/*
* on an overrun error the data is treated as
* good just as it should be.
*/
#ifdef CY_DEBUG
printf("%s: port %d ttyinput 0x%x\n",
sc->sc_dev.dv_xname, port, chr);
#endif
(*linesw[tp->t_line].l_rint) (chr, tp);
s = spltty(); /* really necessary? */
if ((cy->cy_ibuf_rd_ptr += 2) ==
cy->cy_ibuf_end)
cy->cy_ibuf_rd_ptr = cy->cy_ibuf;
splx(s);
#ifdef CY_DEBUG1
did_something = 1;
#endif
}
#ifndef CY_HW_RTS
/*
* If we don't have any received data in ibuf and
* CRTSCTS is on and RTS is turned off, it is time to
* turn RTS back on
*/
if (ISSET(tp->t_cflag, CRTSCTS)) {
/*
* we can't use cy_modem_control() here as it
* doesn't change RTS if RTSCTS is on
*/
cd_write_reg(sc, cy->cy_chip, CD1400_CAR,
port & CD1400_CAR_CHAN);
if ((cd_read_reg(sc, cy->cy_chip,
CD1400_MSVR1) & CD1400_MSVR1_RTS) == 0) {
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1,
CD1400_MSVR1_RTS);
#ifdef CY_DEBUG1
did_something = 1;
#endif
}
}
#endif /* CY_HW_RTS */
/*
* handle carrier changes
*/
s = spltty();
if (ISSET(cy->cy_flags, CY_F_CARRIER_CHANGED)) {
int carrier;
CLR(cy->cy_flags, CY_F_CARRIER_CHANGED);
splx(s);
carrier = ((cy->cy_carrier_stat &
CD1400_MSVR2_CD) != 0);
#ifdef CY_DEBUG
printf("cy_poll: carrier change "
"(card %d, port %d, carrier %d)\n",
card, port, carrier);
#endif
if (CY_DIALIN(tp->t_dev) &&
!(*linesw[tp->t_line].l_modem)(tp, carrier))
cy_modem_control(sc, cy,
TIOCM_DTR, DMBIC);
#ifdef CY_DEBUG1
did_something = 1;
#endif
} else
splx(s);
s = spltty();
if (ISSET(cy->cy_flags, CY_F_START)) {
CLR(cy->cy_flags, CY_F_START);
splx(s);
(*linesw[tp->t_line].l_start) (tp);
#ifdef CY_DEBUG1
did_something = 1;
#endif
} else
splx(s);
/* could move this to even upper level... */
if (cy->cy_fifo_overruns) {
cy->cy_fifo_overruns = 0;
/*
* doesn't report overrun count, but
* shouldn't really matter
*/
log(LOG_WARNING, "%s: port %d fifo overrun\n",
sc->sc_dev.dv_xname, port);
}
if (cy->cy_ibuf_overruns) {
cy->cy_ibuf_overruns = 0;
log(LOG_WARNING, "%s: port %d ibuf overrun\n",
sc->sc_dev.dv_xname, port);
}
} /* for(port...) */
#ifdef CY_DEBUG1
if (did_something && counter >= 200)
sc->sc_poll_count2++;
#endif
} /* for(card...) */
counter = 0;
out:
timeout(cy_poll, NULL, 1);
}
/*
* hardware interrupt routine
*/
int
cy_intr(arg)
void *arg;
{
struct cy_softc *sc = arg;
struct cy_port *cy;
int cy_chip, stat;
int int_serviced = 0;
/*
* Check interrupt status of each CD1400 chip on this card
* (multiple cards cannot share the same interrupt)
*/
for (cy_chip = 0; cy_chip < sc->sc_nchips; cy_chip++) {
stat = cd_read_reg(sc, cy_chip, CD1400_SVRR);
if (stat == 0)
continue;
if (ISSET(stat, CD1400_SVRR_RXRDY)) {
u_char save_car, save_rir, serv_type;
u_char line_stat, recv_data, n_chars;
u_char *buf_p;
save_rir = cd_read_reg(sc, cy_chip, CD1400_RIR);
save_car = cd_read_reg(sc, cy_chip, CD1400_CAR);
/* enter rx service */
cd_write_reg(sc, cy_chip, CD1400_CAR, save_rir);
serv_type = cd_read_reg(sc, cy_chip, CD1400_RIVR);
cy = &sc->sc_ports[serv_type >> 3];
#ifdef CY_DEBUG1
cy->cy_rx_int_count++;
#endif
if (cy->cy_tty == NULL ||
!ISSET(cy->cy_tty->t_state, TS_ISOPEN))
goto end_rx_serv;
buf_p = cy->cy_ibuf_wr_ptr;
if (ISSET(serv_type, CD1400_RIVR_EXCEPTION)) {
line_stat = cd_read_reg(sc, cy->cy_chip,
CD1400_RDSR);
recv_data = cd_read_reg(sc, cy->cy_chip,
CD1400_RDSR);
#ifdef CY_DEBUG
printf("cy%d port %d recv exception, line_stat 0x%x, char 0x%x\n",
card, cy->cy_port_num, line_stat, recv_data);
#endif
if (ISSET(line_stat, CD1400_RDSR_OE))
cy->cy_fifo_overruns++;
*buf_p++ = line_stat;
*buf_p++ = recv_data;
if (buf_p == cy->cy_ibuf_end)
buf_p = cy->cy_ibuf;
if (buf_p == cy->cy_ibuf_rd_ptr) {
if (buf_p == cy->cy_ibuf)
buf_p = cy->cy_ibuf_end;
buf_p -= 2;
cy->cy_ibuf_overruns++;
}
cy_events = 1;
} else {/* no exception, received data OK */
n_chars = cd_read_reg(sc, cy->cy_chip,
CD1400_RDCR);
#ifdef CY_DEBUG
printf("cy%d port %d receive ok %d chars\n",
card, cy->cy_port_num, n_chars);
#endif
while (n_chars--) {
*buf_p++ = 0; /* status: OK */
/* data byte */
*buf_p++ = cd_read_reg(sc,
cy->cy_chip, CD1400_RDSR);
if (buf_p == cy->cy_ibuf_end)
buf_p = cy->cy_ibuf;
if (buf_p == cy->cy_ibuf_rd_ptr) {
if (buf_p == cy->cy_ibuf)
buf_p = cy->cy_ibuf_end;
buf_p -= 2;
cy->cy_ibuf_overruns++;
break;
}
}
cy_events = 1;
}
cy->cy_ibuf_wr_ptr = buf_p;
#ifndef CY_HW_RTS
/* RTS handshaking for incoming data */
if (ISSET(cy->cy_tty->t_cflag, CRTSCTS)) {
int bf;
bf = buf_p - cy->cy_ibuf_rd_ptr;
if (bf < 0)
bf += CY_IBUF_SIZE;
if (bf > (CY_IBUF_SIZE / 2)) /* turn RTS off */
cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0);
}
#endif /* CY_HW_RTS */
end_rx_serv:
/* terminate service context */
cd_write_reg(sc, cy->cy_chip, CD1400_RIR, save_rir & 0x3f);
cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car);
int_serviced = 1;
} /* if(rx_service...) */
if (ISSET(stat, CD1400_SVRR_MDMCH)) {
u_char save_car, save_mir, serv_type, modem_stat;
save_mir = cd_read_reg(sc, cy_chip, CD1400_MIR);
save_car = cd_read_reg(sc, cy_chip, CD1400_CAR);
/* enter modem service */
cd_write_reg(sc, cy_chip, CD1400_CAR, save_mir);
serv_type = cd_read_reg(sc, cy_chip, CD1400_MIVR);
cy = &sc->sc_ports[serv_type >> 3];
#ifdef CY_DEBUG1
cy->cy_modem_int_count++;
#endif
modem_stat = cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2);
#ifdef CY_DEBUG
printf("cy%d port %d modem line change, new stat 0x%x\n",
card, cy->cy_port_num, modem_stat);
#endif
if (ISSET((cy->cy_carrier_stat ^ modem_stat), CD1400_MSVR2_CD)) {
SET(cy->cy_flags, CY_F_CARRIER_CHANGED);
cy_events = 1;
}
cy->cy_carrier_stat = modem_stat;
/* terminate service context */
cd_write_reg(sc, cy->cy_chip, CD1400_MIR, save_mir & 0x3f);
cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car);
int_serviced = 1;
} /* if(modem_service...) */
if (ISSET(stat, CD1400_SVRR_TXRDY)) {
u_char save_car, save_tir, serv_type,
count, ch;
struct tty *tp;
save_tir = cd_read_reg(sc, cy_chip, CD1400_TIR);
save_car = cd_read_reg(sc, cy_chip, CD1400_CAR);
/* enter tx service */
cd_write_reg(sc, cy_chip, CD1400_CAR, save_tir);
serv_type = cd_read_reg(sc, cy_chip, CD1400_TIVR);
cy = &sc->sc_ports[serv_type >> 3];
#ifdef CY_DEBUG1
cy->cy_tx_int_count++;
#endif
#ifdef CY_DEBUG
printf("cy%d port %d tx service\n", card,
cy->cy_port_num);
#endif
/* stop transmitting if no tty or CY_F_STOP set */
tp = cy->cy_tty;
if (tp == NULL || ISSET(cy->cy_flags, CY_F_STOP))
goto txdone;
count = 0;
if (ISSET(cy->cy_flags, CY_F_SEND_NUL)) {
cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0);
cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0);
count += 2;
CLR(cy->cy_flags, CY_F_SEND_NUL);
}
if (tp->t_outq.c_cc > 0) {
SET(tp->t_state, TS_BUSY);
while (tp->t_outq.c_cc > 0 &&
count < CD1400_TX_FIFO_SIZE) {
ch = getc(&tp->t_outq);
/*
* remember to double NUL characters
* because embedded transmit commands
* are enabled
*/
if (ch == 0) {
if (count >= CD1400_TX_FIFO_SIZE - 2) {
SET(cy->cy_flags, CY_F_SEND_NUL);
break;
}
cd_write_reg(sc, cy->cy_chip,
CD1400_TDR, ch);
count++;
}
cd_write_reg(sc, cy->cy_chip,
CD1400_TDR, ch);
count++;
}
} else {
/*
* no data to send -- check if we should
* start/stop a break
*/
/*
* XXX does this cause too much delay before
* breaks?
*/
if (ISSET(cy->cy_flags, CY_F_START_BREAK)) {
cd_write_reg(sc, cy->cy_chip,
CD1400_TDR, 0);
cd_write_reg(sc, cy->cy_chip,
CD1400_TDR, 0x81);
CLR(cy->cy_flags, CY_F_START_BREAK);
}
if (ISSET(cy->cy_flags, CY_F_END_BREAK)) {
cd_write_reg(sc, cy->cy_chip,
CD1400_TDR, 0);
cd_write_reg(sc, cy->cy_chip,
CD1400_TDR, 0x83);
CLR(cy->cy_flags, CY_F_END_BREAK);
}
}
if (tp->t_outq.c_cc == 0) {
txdone:
/*
* No data to send or requested to stop.
* Disable transmit interrupt
*/
cd_write_reg(sc, cy->cy_chip, CD1400_SRER,
cd_read_reg(sc, cy->cy_chip, CD1400_SRER)
& ~CD1400_SRER_TXRDY);
CLR(cy->cy_flags, CY_F_STOP);
CLR(tp->t_state, TS_BUSY);
}
if (tp->t_outq.c_cc <= tp->t_lowat) {
SET(cy->cy_flags, CY_F_START);
cy_events = 1;
}
/* terminate service context */
cd_write_reg(sc, cy->cy_chip, CD1400_TIR, save_tir & 0x3f);
cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car);
int_serviced = 1;
} /* if(tx_service...) */
} /* for(...all CD1400s on a card) */
/* ensure an edge for next interrupt */
bus_space_write_1(sc->sc_memt, sc->sc_bsh,
CY_CLEAR_INTR << sc->sc_bustype, 0);
return int_serviced;
}
/*
* subroutine to enable CD1400 transmitter
*/
static void
cy_enable_transmitter(sc, cy)
struct cy_softc *sc;
struct cy_port *cy;
{
int s = spltty();
cd_write_reg(sc, cy->cy_chip, CD1400_CAR,
cy->cy_port_num & CD1400_CAR_CHAN);
cd_write_reg(sc, cy->cy_chip, CD1400_SRER,
cd_read_reg(sc, cy->cy_chip, CD1400_SRER) | CD1400_SRER_TXRDY);
splx(s);
}
/*
* Execute a CD1400 channel command
*/
static void
cd1400_channel_cmd(sc, cy, cmd)
struct cy_softc *sc;
struct cy_port *cy;
int cmd;
{
u_int waitcnt = 5 * 8 * 1024; /* approx 5 ms */
#ifdef CY_DEBUG
printf("c1400_channel_cmd cy 0x%x command 0x%x\n", cy, cmd);
#endif
/* wait until cd1400 is ready to process a new command */
while (cd_read_reg(sc, cy->cy_chip, CD1400_CCR) != 0 && waitcnt-- > 0);
if (waitcnt == 0)
log(LOG_ERR, "%s: channel command timeout\n",
sc->sc_dev.dv_xname);
cd_write_reg(sc, cy->cy_chip, CD1400_CCR, cmd);
}
/*
* Compute clock option register and baud rate register values
* for a given speed. Return 0 on success, -1 on failure.
*
* The error between requested and actual speed seems
* to be well within allowed limits (less than 3%)
* with every speed value between 50 and 150000 bps.
*/
static int
cy_speed(speed, cor, bpr)
speed_t speed;
int *cor, *bpr;
{
int c, co, br;
if (speed < 50 || speed > 150000)
return -1;
for (c = 0, co = 8; co <= 2048; co <<= 2, c++) {
br = (CY_CLOCK + (co * speed) / 2) / (co * speed);
if (br < 0x100) {
*bpr = br;
*cor = c;
return 0;
}
}
return -1;
}
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