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freebsd-dev/sys/dev/sab/sab.c

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/* $OpenBSD: sab.c,v 1.7 2002/04/08 17:49:42 jason Exp $ */
/*
* Copyright (c) 2001 Jason L. Wright (jason@thought.net)
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* SAB82532 Dual UART driver
*/
#include "opt_ddb.h"
#include "opt_comconsole.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/cons.h>
#include <sys/fcntl.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <sys/serial.h>
#include <sys/syslog.h>
#include <sys/tty.h>
#include <ddb/ddb.h>
#include <dev/ofw/openfirm.h>
#include <sparc64/ebus/ebusvar.h>
#include <dev/sab/sab82532reg.h>
#define SAB_READ(sc, r) \
bus_space_read_1((sc)->sc_bt, (sc)->sc_bh, (r))
#define SAB_WRITE(sc, r, v) \
bus_space_write_1((sc)->sc_bt, (sc)->sc_bh, (r), (v))
#define SABTTY_LOCK(sc) mtx_lock_spin(&sc->sc_mtx)
#define SABTTY_UNLOCK(sc) mtx_unlock_spin(&sc->sc_mtx)
struct sabtty_softc {
device_t sc_dev;
struct sab_softc *sc_parent;
bus_space_tag_t sc_bt;
bus_space_handle_t sc_bh;
struct cdev *sc_si;
struct tty *sc_tty;
int sc_channel;
int sc_icnt;
uint8_t *sc_iput;
uint8_t *sc_iget;
int sc_ocnt;
uint8_t *sc_oget;
int sc_alt_break_state;
struct mtx sc_mtx;
uint8_t sc_console;
uint8_t sc_tx_done;
uint8_t sc_pvr_dtr;
uint8_t sc_pvr_dsr;
uint8_t sc_imr0;
uint8_t sc_imr1;
uint8_t sc_ibuf[CBLOCK];
uint8_t sc_obuf[CBLOCK];
};
struct sab_softc {
device_t sc_dev;
bus_space_tag_t sc_bt;
bus_space_handle_t sc_bh;
struct sabtty_softc *sc_child[SAB_NCHAN];
void *sc_ih;
void *sc_softih;
struct resource *sc_irqres;
int sc_irqrid;
struct resource *sc_iores;
int sc_iorid;
uint8_t sc_ipc;
};
static int sab_probe(device_t dev);
static int sab_attach(device_t dev);
static int sab_detach(device_t dev);
static void sab_intr(void *vsc);
static void sab_softintr(void *vsc);
static void sab_shutdown(void *vsc);
static int sabtty_probe(device_t dev);
static int sabtty_attach(device_t dev);
static int sabtty_detach(device_t dev);
static int sabtty_intr(struct sabtty_softc *sc);
static void sabtty_softintr(struct sabtty_softc *sc);
static void sabttybreak(struct tty *tp, int brk);
static int sabttymodem(struct tty *tp, int biton, int bitoff);
static int sabtty_param(struct sabtty_softc *sc, struct tty *tp,
struct termios *t);
static void sabtty_cec_wait(struct sabtty_softc *sc);
static void sabtty_tec_wait(struct sabtty_softc *sc);
static void sabtty_reset(struct sabtty_softc *sc);
static void sabtty_flush(struct sabtty_softc *sc);
static int sabtty_speed(int);
static int sabtty_console(device_t dev, char *mode, int len);
static cn_probe_t sab_cnprobe;
static cn_init_t sab_cninit;
static cn_term_t sab_cnterm;
static cn_getc_t sab_cngetc;
static cn_checkc_t sab_cncheckc;
static cn_putc_t sab_cnputc;
static cn_dbctl_t sab_cndbctl;
static int sabtty_cngetc(struct sabtty_softc *sc);
static int sabtty_cncheckc(struct sabtty_softc *sc);
static void sabtty_cnputc(struct sabtty_softc *sc, int c);
static d_open_t sabttyopen;
static d_close_t sabttyclose;
static void sabttystart(struct tty *tp);
static void sabttystop(struct tty *tp, int rw);
static int sabttyparam(struct tty *tp, struct termios *t);
static struct cdevsw sabtty_cdevsw = {
.d_version = D_VERSION,
.d_open = sabttyopen,
.d_close = sabttyclose,
.d_name = "sabtty",
.d_flags = D_TTY | D_NEEDGIANT,
};
static device_method_t sab_methods[] = {
DEVMETHOD(device_probe, sab_probe),
DEVMETHOD(device_attach, sab_attach),
DEVMETHOD(device_detach, sab_detach),
DEVMETHOD(bus_print_child, bus_generic_print_child),
{ 0, 0 }
};
static device_method_t sabtty_methods[] = {
DEVMETHOD(device_probe, sabtty_probe),
DEVMETHOD(device_attach, sabtty_attach),
DEVMETHOD(device_detach, sabtty_detach),
{ 0, 0 }
};
static driver_t sab_driver = {
"sab",
sab_methods,
sizeof(struct sab_softc),
};
static driver_t sabtty_driver = {
"sabtty",
sabtty_methods,
sizeof(struct sabtty_softc),
};
static devclass_t sab_devclass;
static devclass_t sabtty_devclass;
static struct sabtty_softc *sabtty_cons;
DRIVER_MODULE(sab, ebus, sab_driver, sab_devclass, 0, 0);
DRIVER_MODULE(sabtty, sab, sabtty_driver, sabtty_devclass, 0, 0);
CONS_DRIVER(sab, sab_cnprobe, sab_cninit, sab_cnterm, sab_cngetc,
sab_cncheckc, sab_cnputc, sab_cndbctl);
struct sabtty_rate {
int baud;
int n, m;
};
struct sabtty_rate sabtty_baudtable[] = {
{ 50, 35, 10 },
{ 75, 47, 9 },
{ 110, 32, 9 },
{ 134, 53, 8 },
{ 150, 47, 8 },
{ 200, 35, 8 },
{ 300, 47, 7 },
{ 600, 47, 6 },
{ 1200, 47, 5 },
{ 1800, 31, 5 },
{ 2400, 47, 4 },
{ 4800, 47, 3 },
{ 9600, 47, 2 },
{ 19200, 47, 1 },
{ 38400, 23, 1 },
{ 57600, 15, 1 },
{ 115200, 7, 1 },
{ 230400, 3, 1 },
{ 460800, 1, 1 },
{ 76800, 11, 1 },
{ 153600, 5, 1 },
{ 307200, 3, 1 },
{ 614400, 3, 0 },
{ 921600, 0, 1 },
};
static int
sab_probe(device_t dev)
{
struct resource *res;
bus_space_handle_t handle;
bus_space_tag_t tag;
uint8_t r;
int rid;
if (strcmp(ebus_get_name(dev), "se") != 0 &&
strcmp(ebus_get_name(dev), "serial") != 0)
return (ENXIO);
rid = 0;
res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
if (res == NULL)
return (ENXIO);
tag = rman_get_bustag(res);
handle = rman_get_bushandle(res);
r = bus_space_read_1(tag, handle, SAB_VSTR) & SAB_VSTR_VMASK;
switch (r) {
case SAB_VSTR_V_1:
device_set_desc(dev, "Siemens SAB 82532 v1");
break;
case SAB_VSTR_V_2:
device_set_desc(dev, "Siemens SAB 82532 v2");
break;
case SAB_VSTR_V_32:
device_set_desc(dev, "Siemens SAB 82532 v3.2");
break;
default:
device_set_desc(dev, "Siemens SAB 82532 ???");
break;
}
bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
return (0);
}
static int
sab_attach(device_t dev)
{
struct device *child[SAB_NCHAN];
struct resource *irqres;
struct resource *iores;
struct sab_softc *sc;
int irqrid;
int iorid;
int i;
iorid = 0;
irqrid = 0;
irqres = NULL;
sc = device_get_softc(dev);
iores = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &iorid,
RF_ACTIVE);
if (iores == NULL)
goto error;
irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irqrid,
RF_ACTIVE);
if (irqres == NULL)
goto error;
if (bus_setup_intr(dev, irqres, INTR_TYPE_TTY | INTR_FAST, sab_intr,
sc, &sc->sc_ih) != 0)
goto error;
sc->sc_dev = dev;
sc->sc_irqres = irqres;
sc->sc_iores = iores;
sc->sc_iorid = iorid;
sc->sc_irqres = irqres;
sc->sc_irqrid = irqrid;
sc->sc_bt = rman_get_bustag(iores);
sc->sc_bh = rman_get_bushandle(iores);
/* Set all pins, except DTR pins to be inputs */
SAB_WRITE(sc, SAB_PCR, ~(SAB_PVR_DTR_A | SAB_PVR_DTR_B));
/* Disable port interrupts */
SAB_WRITE(sc, SAB_PIM, 0xff);
SAB_WRITE(sc, SAB_PVR, SAB_PVR_DTR_A | SAB_PVR_DTR_B | SAB_PVR_MAGIC);
sc->sc_ipc = SAB_IPC_ICPL | SAB_IPC_VIS;
SAB_WRITE(sc, SAB_IPC, sc->sc_ipc);
for (i = 0; i < SAB_NCHAN; i++)
child[i] = device_add_child(dev, "sabtty", -1);
bus_generic_attach(dev);
for (i = 0; i < SAB_NCHAN; i++)
sc->sc_child[i] = device_get_softc(child[i]);
swi_add(&tty_ithd, "tty:sab", sab_softintr, sc, SWI_TTY,
INTR_TYPE_TTY, &sc->sc_softih);
if (sabtty_cons != NULL) {
DELAY(50000);
cninit();
}
EVENTHANDLER_REGISTER(shutdown_final, sab_shutdown, sc,
SHUTDOWN_PRI_DEFAULT);
return (0);
error:
if (irqres != NULL)
bus_release_resource(dev, SYS_RES_IRQ, irqrid, irqres);
if (iores != NULL)
bus_release_resource(dev, SYS_RES_IRQ, iorid, iores);
return (ENXIO);
}
static int
sab_detach(device_t dev)
{
struct sab_softc *sc;
sc = device_get_softc(dev);
bus_generic_detach(dev);
if (sc->sc_iores != NULL)
bus_release_resource(dev, SYS_RES_IOPORT, sc->sc_iorid,
sc->sc_iores);
return (0);
}
static void
sab_intr(void *v)
{
struct sab_softc *sc = v;
int needsoft = 0;
uint8_t gis;
gis = SAB_READ(sc, SAB_GIS);
/* channel A */
if ((gis & (SAB_GIS_ISA1 | SAB_GIS_ISA0)) != 0)
needsoft |= sabtty_intr(sc->sc_child[0]);
/* channel B */
if ((gis & (SAB_GIS_ISB1 | SAB_GIS_ISB0)) != 0)
needsoft |= sabtty_intr(sc->sc_child[1]);
if (needsoft)
swi_sched(sc->sc_softih, 0);
}
static void
sab_softintr(void *v)
{
struct sab_softc *sc = v;
sabtty_softintr(sc->sc_child[0]);
sabtty_softintr(sc->sc_child[1]);
}
static void
sab_shutdown(void *v)
{
struct sab_softc *sc = v;
SAB_WRITE(sc, SAB_IPC, SAB_IPC_ICPL | SAB_IPC_VIS);
SAB_WRITE(sc, SAB_RFC, SAB_READ(sc, SAB_RFC) & ~SAB_RFC_RFDF);
}
static int
sabtty_probe(device_t dev)
{
char desc[32];
snprintf(desc, sizeof(desc), "tty%c", device_get_unit(dev) + 'a');
device_set_desc_copy(dev, desc);
return (0);
}
static int
sabtty_attach(device_t dev)
{
struct sabtty_softc *sc;
struct tty *tp;
char mode[32];
int baud;
int clen;
char parity;
int stop;
char c;
sc = device_get_softc(dev);
mtx_init(&sc->sc_mtx, "sabtty", NULL, MTX_SPIN);
sc->sc_dev = dev;
sc->sc_parent = device_get_softc(device_get_parent(dev));
sc->sc_bt = sc->sc_parent->sc_bt;
sc->sc_channel = device_get_unit(dev) & 1;
sc->sc_iput = sc->sc_iget = sc->sc_ibuf;
sc->sc_oget = sc->sc_obuf;
switch (sc->sc_channel) {
case 0: /* port A */
sc->sc_pvr_dtr = SAB_PVR_DTR_A;
sc->sc_pvr_dsr = SAB_PVR_DSR_A;
bus_space_subregion(sc->sc_bt, sc->sc_parent->sc_bh,
SAB_CHAN_A, SAB_CHANLEN, &sc->sc_bh);
break;
case 1: /* port B */
sc->sc_pvr_dtr = SAB_PVR_DTR_B;
sc->sc_pvr_dsr = SAB_PVR_DSR_B;
bus_space_subregion(sc->sc_bt, sc->sc_parent->sc_bh,
SAB_CHAN_B, SAB_CHANLEN, &sc->sc_bh);
break;
default:
return (ENXIO);
}
tp = ttymalloc(NULL);
sc->sc_si = make_dev(&sabtty_cdevsw, device_get_unit(dev),
UID_ROOT, GID_WHEEL, 0600, "%s", device_get_desc(dev));
sc->sc_si->si_drv1 = sc;
sc->sc_si->si_tty = tp;
tp->t_dev = sc->sc_si;
sc->sc_tty = tp;
tp->t_oproc = sabttystart;
tp->t_param = sabttyparam;
tp->t_modem = sabttymodem;
tp->t_break = sabttybreak;
tp->t_stop = sabttystop;
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_cflag = CREAD | CLOCAL | CS8;
tp->t_ospeed = TTYDEF_SPEED;
tp->t_ispeed = TTYDEF_SPEED;
if (sabtty_console(dev, mode, sizeof(mode))) {
ttychars(tp);
if (sscanf(mode, "%d,%d,%c,%d,%c", &baud, &clen, &parity,
&stop, &c) == 5) {
tp->t_ospeed = baud;
tp->t_ispeed = baud;
tp->t_cflag = CREAD | CLOCAL;
switch (clen) {
case 5:
tp->t_cflag |= CS5;
break;
case 6:
tp->t_cflag |= CS6;
break;
case 7:
tp->t_cflag |= CS7;
break;
case 8:
default:
tp->t_cflag |= CS8;
break;
}
if (parity == 'e')
tp->t_cflag |= PARENB;
else if (parity == 'o')
tp->t_cflag |= PARENB | PARODD;
if (stop == 2)
tp->t_cflag |= CSTOPB;
}
device_printf(dev, "console %s\n", mode);
sc->sc_console = 1;
sabtty_cons = sc;
}
return (0);
}
static int
sabtty_detach(device_t dev)
{
return (bus_generic_detach(dev));
}
static int
sabtty_intr(struct sabtty_softc *sc)
{
int clearfifo;
int needsoft;
uint8_t isr0;
uint8_t isr1;
uint8_t c;
int brk;
int len;
int i;
brk = 0;
len = 0;
clearfifo = 0;
needsoft = 0;
SABTTY_LOCK(sc);
isr0 = SAB_READ(sc, SAB_ISR0);
isr1 = SAB_READ(sc, SAB_ISR1);
if (isr0 & SAB_ISR0_RPF) {
len = 32;
clearfifo = 1;
}
if (isr0 & SAB_ISR0_TCD) {
len = (32 - 1) & SAB_READ(sc, SAB_RBCL);
clearfifo = 1;
}
if (isr0 & SAB_ISR0_TIME) {
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_RFRD);
}
if (isr0 & SAB_ISR0_RFO)
clearfifo = 1;
if (len != 0) {
for (i = 0; i < len; i++) {
c = SAB_READ(sc, SAB_RFIFO);
#if defined(DDB) && defined(ALT_BREAK_TO_DEBUGGER)
if (sc->sc_console != 0 && (i & 1) == 0)
brk = db_alt_break(c, &sc->sc_alt_break_state);
#endif
*sc->sc_iput++ = c;
if (sc->sc_iput == sc->sc_ibuf + sizeof(sc->sc_ibuf))
sc->sc_iput = sc->sc_ibuf;
}
needsoft = 1;
}
if (clearfifo) {
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_RMC);
}
if (isr1 & SAB_ISR1_ALLS) {
sc->sc_tx_done = 1;
sc->sc_imr1 |= SAB_IMR1_ALLS;
SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
needsoft = 1;
}
#if defined(DDB) && defined(BREAK_TO_DEBUGGER)
if (sc->sc_console != 0 && (isr1 & SAB_ISR1_BRK) != 0) {
brk = 1;
}
#endif
if (isr1 & SAB_ISR1_XPR) {
if (sc->sc_ocnt > 0) {
len = min(sc->sc_ocnt, 32);
for (i = 0; i < len; i++)
SAB_WRITE(sc, SAB_XFIFO + i, *sc->sc_oget++);
sc->sc_ocnt -= len;
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_XF);
}
if (sc->sc_ocnt == 0) {
sc->sc_imr1 |= SAB_IMR1_XPR;
sc->sc_imr1 &= ~SAB_IMR1_ALLS;
SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
}
}
SABTTY_UNLOCK(sc);
if (brk != 0)
breakpoint();
return (needsoft);
}
static void
sabtty_softintr(struct sabtty_softc *sc)
{
struct tty *tp = sc->sc_tty;
int data;
int stat;
if ((tp->t_state & TS_ISOPEN) == 0)
return;
while (sc->sc_iget != sc->sc_iput) {
data = *sc->sc_iget++;
stat = *sc->sc_iget++;
if (stat & SAB_RSTAT_PE)
data |= TTY_PE;
if (stat & SAB_RSTAT_FE)
data |= TTY_FE;
if (sc->sc_iget == sc->sc_ibuf + sizeof(sc->sc_ibuf))
sc->sc_iget = sc->sc_ibuf;
ttyld_rint(tp, data);
}
if (sc->sc_tx_done != 0) {
sc->sc_tx_done = 0;
tp->t_state &= ~TS_BUSY;
ttyld_start(tp);
}
}
static int
sabttyopen(struct cdev *dev, int flags, int mode, struct thread *td)
{
struct sabtty_softc *sc;
struct tty *tp;
int error;
sc = dev->si_drv1;
tp = dev->si_tty;
if ((tp->t_state & TS_ISOPEN) != 0 &&
(tp->t_state & TS_XCLUDE) != 0 &&
suser(td) != 0)
return (EBUSY);
if ((tp->t_state & TS_ISOPEN) == 0) {
struct termios t;
sc->sc_iput = sc->sc_iget = sc->sc_ibuf;
/*
* Initialize the termios status to the defaults. Add in the
* sticky bits from TIOCSFLAGS.
*/
t.c_ispeed = 0;
t.c_ospeed = TTYDEF_SPEED;
t.c_cflag = TTYDEF_CFLAG;
/* Make sure zstty_param() will do something. */
tp->t_ospeed = 0;
(void)sabtty_param(sc, tp, &t);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
ttychars(tp);
ttsetwater(tp);
SABTTY_LOCK(sc);
sabtty_reset(sc);
sc->sc_parent->sc_ipc = SAB_IPC_ICPL;
SAB_WRITE(sc->sc_parent, SAB_IPC, sc->sc_parent->sc_ipc);
sc->sc_imr0 = SAB_IMR0_PERR | SAB_IMR0_FERR | SAB_IMR0_PLLA;
SAB_WRITE(sc, SAB_IMR0, sc->sc_imr0);
#if defined(DDB) && defined(BREAK_TO_DEBUGGER)
sc->sc_imr1 = SAB_IMR1_ALLS | SAB_IMR1_XDU |
SAB_IMR1_TIN | SAB_IMR1_CSC | SAB_IMR1_XMR | SAB_IMR1_XPR;
#else
sc->sc_imr1 = SAB_IMR1_BRK | SAB_IMR1_ALLS | SAB_IMR1_XDU |
SAB_IMR1_TIN | SAB_IMR1_CSC | SAB_IMR1_XMR | SAB_IMR1_XPR;
#endif
SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
SAB_WRITE(sc, SAB_CCR0, SAB_READ(sc, SAB_CCR0) | SAB_CCR0_PU);
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_XRES);
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_RRES);
sabtty_cec_wait(sc);
sabtty_flush(sc);
SABTTY_UNLOCK(sc);
/* XXX turn on DTR */
/* XXX handle initial DCD */
}
error = ttyopen(dev, tp);
if (error != 0)
return (error);
error = ttyld_open(tp, dev);
if (error != 0)
return (error);
return (0);
}
static int
sabttyclose(struct cdev *dev, int flags, int mode, struct thread *td)
{
struct tty *tp;
tp = dev->si_tty;
if ((tp->t_state & TS_ISOPEN) == 0)
return (0);
ttyld_close(tp, flags);
ttyclose(tp);
return (0);
}
static void
sabttybreak(struct tty *tp, int brk)
{
struct sabtty_softc *sc;
sc = tp->t_dev->si_drv1;
if (brk)
SAB_WRITE(sc, SAB_DAFO,
SAB_READ(sc, SAB_DAFO) | SAB_DAFO_XBRK);
else
SAB_WRITE(sc, SAB_DAFO,
SAB_READ(sc, SAB_DAFO) & ~SAB_DAFO_XBRK);
}
static void
sabttystart(struct tty *tp)
{
struct sabtty_softc *sc;
sc = tp->t_dev->si_drv1;
if ((tp->t_state & TS_TBLOCK) != 0)
/* XXX clear RTS */;
else
/* XXX set RTS */;
if ((tp->t_state & (TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) != 0) {
ttwwakeup(tp);
return;
}
if (tp->t_outq.c_cc <= tp->t_olowat) {
if ((tp->t_state & TS_SO_OLOWAT) != 0) {
tp->t_state &= ~TS_SO_OLOWAT;
wakeup(TSA_OLOWAT(tp));
}
selwakeuppri(&tp->t_wsel, TTOPRI);
if (tp->t_outq.c_cc == 0) {
if ((tp->t_state & (TS_BUSY | TS_SO_OCOMPLETE)) ==
TS_SO_OCOMPLETE && tp->t_outq.c_cc == 0) {
tp->t_state &= ~TS_SO_OCOMPLETE;
wakeup(TSA_OCOMPLETE(tp));
}
return;
}
}
sc->sc_ocnt = q_to_b(&tp->t_outq, sc->sc_obuf, sizeof(sc->sc_obuf));
if (sc->sc_ocnt == 0)
return;
sc->sc_oget = sc->sc_obuf;
tp->t_state |= TS_BUSY;
sc->sc_imr1 &= ~SAB_IMR1_XPR;
SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
ttwwakeup(tp);
}
static void
sabttystop(struct tty *tp, int flag)
{
struct sabtty_softc *sc;
sc = tp->t_dev->si_drv1;
if ((flag & FREAD) != 0) {
/* XXX stop reading, anything to do? */;
}
if ((flag & FWRITE) != 0) {
if ((tp->t_state & TS_BUSY) != 0) {
/* XXX do what? */
if ((tp->t_state & TS_TTSTOP) == 0)
tp->t_state |= TS_FLUSH;
}
}
}
static int
sabttyparam(struct tty *tp, struct termios *t)
{
struct sabtty_softc *sc;
sc = tp->t_dev->si_drv1;
return (sabtty_param(sc, tp, t));
}
int
sabttymodem(struct tty *tp, int biton, int bitoff)
{
struct sabtty_softc *sc;
u_int8_t r;
sc = tp->t_dev->si_drv1;
if (biton == 0 && bitoff == 0) {
if (SAB_READ(sc, SAB_STAR) & SAB_STAR_CTS)
biton |= TIOCM_CTS;
if ((SAB_READ(sc, SAB_VSTR) & SAB_VSTR_CD) == 0)
biton |= TIOCM_CD;
r = SAB_READ(sc, SAB_PVR);
if ((r & sc->sc_pvr_dtr) == 0)
biton |= TIOCM_DTR;
if ((r & sc->sc_pvr_dsr) == 0)
biton |= TIOCM_DSR;
r = SAB_READ(sc, SAB_MODE);
if ((r & (SAB_MODE_RTS|SAB_MODE_FRTS)) == SAB_MODE_RTS)
biton |= TIOCM_RTS;
return (biton);
}
bitoff |= biton;
if (bitoff & SER_RTS) {
r = SAB_READ(sc, SAB_MODE);
r &= ~SAB_MODE_FRTS;
if (biton & SER_RTS)
r |= SAB_MODE_RTS;
SAB_WRITE(sc, SAB_MODE, r);
}
if (bitoff & SER_DTR) {
r = SAB_READ(sc, SAB_PVR);
r &= ~sc->sc_pvr_dtr;
if (biton & SER_DTR)
r |= sc->sc_pvr_dtr;
SAB_WRITE(sc, SAB_PVR, r);
}
return (0);
}
int
sabtty_param(struct sabtty_softc *sc, struct tty *tp, struct termios *t)
{
int ospeed;
tcflag_t cflag;
u_int8_t dafo, r;
ospeed = sabtty_speed(t->c_ospeed);
if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed))
return (EINVAL);
/*
* 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);
/* hang up line if ospeed is zero, otherwise raise dtr */
if (t->c_ospeed != 0)
sabttymodem(tp, SER_DTR, 0);
else
sabttymodem(tp, 0, SER_DTR);
dafo = SAB_READ(sc, SAB_DAFO);
cflag = t->c_cflag;
if (sc->sc_console != 0) {
cflag |= CLOCAL;
cflag &= ~HUPCL;
}
if (cflag & CSTOPB)
dafo |= SAB_DAFO_STOP;
else
dafo &= ~SAB_DAFO_STOP;
dafo &= ~SAB_DAFO_CHL_CSIZE;
switch (cflag & CSIZE) {
case CS5:
dafo |= SAB_DAFO_CHL_CS5;
break;
case CS6:
dafo |= SAB_DAFO_CHL_CS6;
break;
case CS7:
dafo |= SAB_DAFO_CHL_CS7;
break;
default:
dafo |= SAB_DAFO_CHL_CS8;
break;
}
dafo &= ~SAB_DAFO_PARMASK;
if (cflag & PARENB) {
if (cflag & PARODD)
dafo |= SAB_DAFO_PAR_ODD;
else
dafo |= SAB_DAFO_PAR_EVEN;
} else
dafo |= SAB_DAFO_PAR_NONE;
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = cflag;
ttsetwater(tp);
SABTTY_LOCK(sc);
if (ospeed != 0) {
SAB_WRITE(sc, SAB_BGR, ospeed & 0xff);
r = SAB_READ(sc, SAB_CCR2);
r &= ~(SAB_CCR2_BR9 | SAB_CCR2_BR8);
r |= (ospeed >> 2) & (SAB_CCR2_BR9 | SAB_CCR2_BR8);
SAB_WRITE(sc, SAB_CCR2, r);
}
r = SAB_READ(sc, SAB_MODE);
r |= SAB_MODE_RAC;
if (cflag & CRTSCTS) {
r &= ~(SAB_MODE_RTS | SAB_MODE_FCTS);
r |= SAB_MODE_FRTS;
sc->sc_imr1 &= ~SAB_IMR1_CSC;
} else {
r |= SAB_MODE_RTS | SAB_MODE_FCTS;
r &= ~SAB_MODE_FRTS;
sc->sc_imr1 |= SAB_IMR1_CSC;
}
SAB_WRITE(sc, SAB_MODE, r);
SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
SABTTY_UNLOCK(sc);
return (0);
}
static void
sabtty_cec_wait(struct sabtty_softc *sc)
{
int i = 50000;
for (;;) {
if ((SAB_READ(sc, SAB_STAR) & SAB_STAR_CEC) == 0)
return;
if (--i == 0)
break;
DELAY(1);
}
}
static void
sabtty_tec_wait(struct sabtty_softc *sc)
{
int i = 200000;
for (;;) {
if ((SAB_READ(sc, SAB_STAR) & SAB_STAR_TEC) == 0)
return;
if (--i == 0)
break;
DELAY(1);
}
}
static void
sabtty_reset(struct sabtty_softc *sc)
{
/* power down */
SAB_WRITE(sc, SAB_CCR0, 0);
/* set basic configuration */
SAB_WRITE(sc, SAB_CCR0,
SAB_CCR0_MCE | SAB_CCR0_SC_NRZ | SAB_CCR0_SM_ASYNC);
SAB_WRITE(sc, SAB_CCR1, SAB_CCR1_ODS | SAB_CCR1_BCR | SAB_CCR1_CM_7);
SAB_WRITE(sc, SAB_CCR2, SAB_CCR2_BDF | SAB_CCR2_SSEL | SAB_CCR2_TOE);
SAB_WRITE(sc, SAB_CCR3, 0);
SAB_WRITE(sc, SAB_CCR4, SAB_CCR4_MCK4 | SAB_CCR4_EBRG);
SAB_WRITE(sc, SAB_MODE, SAB_MODE_RTS | SAB_MODE_FCTS | SAB_MODE_RAC);
SAB_WRITE(sc, SAB_RFC,
SAB_RFC_DPS | SAB_RFC_RFDF | SAB_RFC_RFTH_32CHAR);
/* clear interrupts */
sc->sc_imr0 = sc->sc_imr1 = 0xff;
SAB_WRITE(sc, SAB_IMR0, sc->sc_imr0);
SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
SAB_READ(sc, SAB_ISR0);
SAB_READ(sc, SAB_ISR1);
}
static void
sabtty_flush(struct sabtty_softc *sc)
{
/* clear rx fifo */
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_RRES);
/* clear tx fifo */
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_XRES);
}
static int
sabtty_speed(int rate)
{
int i, len, r;
if (rate == 0)
return (0);
len = sizeof(sabtty_baudtable)/sizeof(sabtty_baudtable[0]);
for (i = 0; i < len; i++) {
if (rate == sabtty_baudtable[i].baud) {
r = sabtty_baudtable[i].n |
(sabtty_baudtable[i].m << 6);
return (r);
}
}
return (-1);
}
static void
sab_cnprobe(struct consdev *cn)
{
struct sabtty_softc *sc = sabtty_cons;
if (sc == NULL)
cn->cn_pri = CN_DEAD;
else {
cn->cn_pri = CN_REMOTE;
strcpy(cn->cn_name, devtoname(sc->sc_si));
cn->cn_tp = sc->sc_tty;
}
}
static void
sab_cninit(struct consdev *cn)
{
}
static void
sab_cnterm(struct consdev *cn)
{
}
static int
sab_cngetc(struct consdev *cn)
{
struct sabtty_softc *sc = sabtty_cons;
if (sc == NULL)
return (-1);
return (sabtty_cngetc(sc));
}
static int
sab_cncheckc(struct consdev *cn)
{
struct sabtty_softc *sc = sabtty_cons;
if (sc == NULL)
return (-1);
return (sabtty_cncheckc(sc));
}
static void
sab_cnputc(struct consdev *cn, int c)
{
struct sabtty_softc *sc = sabtty_cons;
if (sc == NULL)
return;
sabtty_cnputc(sc, c);
}
static void
sab_cndbctl(struct consdev *cn, int c)
{
}
static void
sabtty_cnopen(struct sabtty_softc *sc)
{
SAB_WRITE(sc, SAB_IMR0, 0xff);
SAB_WRITE(sc, SAB_IMR1, 0xff);
SAB_WRITE(sc->sc_parent, SAB_IPC, sc->sc_parent->sc_ipc | SAB_IPC_VIS);
}
static void
sabtty_cnclose(struct sabtty_softc *sc)
{
SAB_WRITE(sc, SAB_IMR0, sc->sc_imr0);
SAB_WRITE(sc, SAB_IMR1, sc->sc_imr1);
SAB_WRITE(sc->sc_parent, SAB_IPC, sc->sc_parent->sc_ipc);
}
static int
sabtty_cngetc(struct sabtty_softc *sc)
{
uint8_t len;
uint8_t r;
sabtty_cnopen(sc);
again:
do {
r = SAB_READ(sc, SAB_STAR);
} while ((r & SAB_STAR_RFNE) == 0);
/*
* Ok, at least one byte in RFIFO, ask for permission to access RFIFO
* (I hate this chip... hate hate hate).
*/
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_RFRD);
/* Wait for RFIFO to come ready */
do {
r = SAB_READ(sc, SAB_ISR0);
} while ((r & SAB_ISR0_TCD) == 0);
len = SAB_READ(sc, SAB_RBCL) & (32 - 1);
if (len == 0)
goto again; /* Shouldn't happen... */
r = SAB_READ(sc, SAB_RFIFO);
/*
* Blow away everything left in the FIFO...
*/
sabtty_cec_wait(sc);
SAB_WRITE(sc, SAB_CMDR, SAB_CMDR_RMC);
sabtty_cnclose(sc);
return (r);
}
static int
sabtty_cncheckc(struct sabtty_softc *sc)
{
int8_t r;
r = -1;
sabtty_cnopen(sc);
if ((SAB_READ(sc, SAB_STAR) & SAB_STAR_RFNE) != 0)
r = sabtty_cngetc(sc);
sabtty_cnclose(sc);
return (r);
}
static void
sabtty_cnputc(struct sabtty_softc *sc, int c)
{
sabtty_cnopen(sc);
sabtty_tec_wait(sc);
SAB_WRITE(sc, SAB_TIC, c);
sabtty_tec_wait(sc);
sabtty_cnclose(sc);
}
static int
sabtty_console(device_t dev, char *mode, int len)
{
device_t parent;
phandle_t chosen;
phandle_t options;
ihandle_t stdin;
ihandle_t stdout;
char output[32];
char input[32];
char name[32];
parent = device_get_parent(dev);
chosen = OF_finddevice("/chosen");
options = OF_finddevice("/options");
if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1 ||
OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1 ||
OF_getprop(options, "input-device", input, sizeof(input)) == -1 ||
OF_getprop(options, "output-device", output, sizeof(output)) == -1)
return (0);
if (ebus_get_node(parent) != OF_instance_to_package(stdin) ||
ebus_get_node(parent) != OF_instance_to_package(stdout))
return (0);
if ((strcmp(input, device_get_desc(dev)) == 0 &&
strcmp(output, device_get_desc(dev)) == 0) ||
(strcmp(input, "keyboard") == 0 && strcmp(output, "screen") == 0 &&
(device_get_unit(dev) & 1) == 0)) {
if (mode != NULL) {
sprintf(name, "%s-mode", device_get_desc(dev));
return (OF_getprop(options, name, mode, len) != -1);
} else
return (1);
}
return (0);
}
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