/* $OpenBSD: z8530kbd.c,v 1.19 2007/05/25 21:27:15 krw Exp $ */
/* $NetBSD: z8530tty.c,v 1.77 2001/05/30 15:24:24 lukem Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998, 1999
* Charles M. Hannum. 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 Charles M. Hannum.
* 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.
*/
/*
* Copyright (c) 1994 Gordon W. Ross
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)zs.c 8.1 (Berkeley) 7/19/93
*/
/*
* Zilog Z8530 Dual UART driver (tty interface)
*
* This is the "slave" driver that will be attached to
* the "zsc" driver for plain "tty" async. serial lines.
*
* Credits, history:
*
* The original version of this code was the sparc/dev/zs.c driver
* as distributed with the Berkeley 4.4 Lite release. Since then,
* Gordon Ross reorganized the code into the current parent/child
* driver scheme, separating the Sun keyboard and mouse support
* into independent child drivers.
*
* RTS/CTS flow-control support was a collaboration of:
* Gordon Ross <gwr@netbsd.org>,
* Bill Studenmund <wrstuden@loki.stanford.edu>
* Ian Dall <Ian.Dall@dsto.defence.gov.au>
*
* The driver was massively overhauled in November 1997 by Charles Hannum,
* fixing *many* bugs, and substantially improving performance.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/tty.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <machine/autoconf.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wskbdvar.h>
#include <dev/sun/sunkbdreg.h>
#include <dev/sun/sunkbdvar.h>
#include <sparc64/dev/z8530reg.h>
#include <machine/z8530var.h>
#include <dev/cons.h>
/*
* How many input characters we can buffer.
* The port-specific var.h may override this.
* Note: must be a power of two!
*/
#ifndef ZSKBD_RING_SIZE
#define ZSKBD_RING_SIZE 2048
#endif
struct cfdriver zskbd_cd = {
NULL, "zskbd", DV_TTY
};
/*
* Make this an option variable one can patch.
* But be warned: this must be a power of 2!
*/
u_int zskbd_rbuf_size = ZSKBD_RING_SIZE;
/* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */
u_int zskbd_rbuf_hiwat = (ZSKBD_RING_SIZE * 1) / 4;
u_int zskbd_rbuf_lowat = (ZSKBD_RING_SIZE * 3) / 4;
struct zskbd_softc {
struct sunkbd_softc sc_base;
struct zs_chanstate *zst_cs;
struct timeout zst_diag_ch;
u_int zst_overflows,
zst_floods,
zst_errors;
int zst_hwflags, /* see z8530var.h */
zst_swflags; /* TIOCFLAG_SOFTCAR, ... <ttycom.h> */
u_int zst_r_hiwat,
zst_r_lowat;
u_char *volatile zst_rbget,
*volatile zst_rbput;
volatile u_int zst_rbavail;
u_char *zst_rbuf,
*zst_ebuf;
/*
* The transmit byte count and address are used for pseudo-DMA
* output in the hardware interrupt code. PDMA can be suspended
* to get pending changes done; heldtbc is used for this. It can
* also be stopped for ^S; this sets TS_TTSTOP in tp->t_state.
*/
u_char *zst_tba; /* transmit buffer address */
u_int zst_tbc, /* transmit byte count */
zst_heldtbc; /* held tbc while xmission stopped */
u_char zst_tbuf[ZSKBD_RING_SIZE];
u_char *zst_tbeg, *zst_tend, *zst_tbp;
/* Flags to communicate with zskbd_softint() */
volatile u_char zst_rx_flags, /* receiver blocked */
#define RX_TTY_BLOCKED 0x01
#define RX_TTY_OVERFLOWED 0x02
#define RX_IBUF_BLOCKED 0x04
#define RX_IBUF_OVERFLOWED 0x08
#define RX_ANY_BLOCK 0x0f
zst_tx_busy, /* working on an output chunk */
zst_tx_done, /* done with one output chunk */
zst_tx_stopped, /* H/W level stop (lost CTS) */
zst_st_check, /* got a status interrupt */
zst_rx_ready;
/* PPS signal on DCD, with or without inkernel clock disciplining */
u_char zst_ppsmask; /* pps signal mask */
u_char zst_ppsassert; /* pps leading edge */
u_char zst_ppsclear; /* pps trailing edge */
};
/* Definition of the driver for autoconfig. */
static int zskbd_match(struct device *, void *, void *);
static void zskbd_attach(struct device *, struct device *, void *);
struct cfattach zskbd_ca = {
sizeof(struct zskbd_softc), zskbd_match, zskbd_attach
};
struct zsops zsops_kbd;
static void zs_modem(struct zskbd_softc *, int);
static void zs_hwiflow(struct zskbd_softc *);
static void zs_maskintr(struct zskbd_softc *);
struct zskbd_softc *zskbd_device_lookup(struct cfdriver *, int);
/* Low-level routines. */
static void zskbd_rxint(struct zs_chanstate *);
static void zskbd_stint(struct zs_chanstate *, int);
static void zskbd_txint(struct zs_chanstate *);
static void zskbd_softint(struct zs_chanstate *);
static void zskbd_diag(void *);
int zskbd_init(struct zskbd_softc *);
void zskbd_putc(struct zskbd_softc *, u_int8_t);
void zskbd_raw(struct zskbd_softc *, u_int8_t);
/* wskbd glue */
void zskbd_cngetc(void *, u_int *, int *);
void zskbd_cnpollc(void *, int);
void zsstart_tx(struct zskbd_softc *);
int zsenqueue_tx(void *, u_int8_t *, u_int);
struct wskbd_consops zskbd_consops = {
zskbd_cngetc,
zskbd_cnpollc
};
#define ZSKBDUNIT(x) (minor(x) & 0x7ffff)
struct zskbd_softc *
zskbd_device_lookup(cf, unit)
struct cfdriver *cf;
int unit;
{
return (struct zskbd_softc *)device_lookup(cf, unit);
}
/*
* zskbd_match: how is this zs channel configured?
*/
int
zskbd_match(parent, vcf, aux)
struct device *parent;
void *vcf;
void *aux;
{
struct cfdata *cf = vcf;
struct zsc_attach_args *args = aux;
int ret;
/* If we're not looking for a keyboard, just exit */
if (strcmp(args->type, "keyboard") != 0)
return (0);
ret = 10;
/* Exact match is better than wildcard. */
if (cf->cf_loc[ZSCCF_CHANNEL] == args->channel)
ret += 2;
/* This driver accepts wildcard. */
if (cf->cf_loc[ZSCCF_CHANNEL] == ZSCCF_CHANNEL_DEFAULT)
ret += 1;
return (ret);
}
void
zskbd_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct zsc_softc *zsc = (void *)parent;
struct zskbd_softc *zst = (void *)self;
struct sunkbd_softc *ss = (void *)self;
struct cfdata *cf = self->dv_cfdata;
struct zsc_attach_args *args = aux;
struct wskbddev_attach_args a;
struct zs_chanstate *cs;
int channel, s, tty_unit, console = 0;
dev_t dev;
ss->sc_sendcmd = zsenqueue_tx;
timeout_set(&ss->sc_bellto, sunkbd_bellstop, zst);
timeout_set(&zst->zst_diag_ch, zskbd_diag, zst);
zst->zst_tbp = zst->zst_tba = zst->zst_tbeg = zst->zst_tbuf;
zst->zst_tend = zst->zst_tbeg + ZSKBD_RING_SIZE;
tty_unit = ss->sc_dev.dv_unit;
channel = args->channel;
cs = zsc->zsc_cs[channel];
cs->cs_private = zst;
cs->cs_ops = &zsops_kbd;
zst->zst_cs = cs;
zst->zst_swflags = cf->cf_flags; /* softcar, etc. */
zst->zst_hwflags = args->hwflags;
dev = makedev(zs_major, tty_unit);
if (zst->zst_swflags)
printf(" flags 0x%x", zst->zst_swflags);
/*
* Check whether we serve as a console device.
* XXX - split console input/output channels aren't
* supported yet on /dev/console
*/
if ((zst->zst_hwflags & ZS_HWFLAG_CONSOLE_INPUT) != 0) {
if ((args->hwflags & ZS_HWFLAG_USE_CONSDEV) != 0) {
args->consdev->cn_dev = dev;
cn_tab->cn_pollc = wskbd_cnpollc;
cn_tab->cn_getc = wskbd_cngetc;
}
cn_tab->cn_dev = dev;
console = 1;
}
zst->zst_rbuf = malloc(zskbd_rbuf_size << 1, M_DEVBUF, M_WAITOK);
zst->zst_ebuf = zst->zst_rbuf + (zskbd_rbuf_size << 1);
/* Disable the high water mark. */
zst->zst_r_hiwat = 0;
zst->zst_r_lowat = 0;
zst->zst_rbget = zst->zst_rbput = zst->zst_rbuf;
zst->zst_rbavail = zskbd_rbuf_size;
/* if there are no enable/disable functions, assume the device
is always enabled */
if (!cs->enable)
cs->enabled = 1;
/*
* Hardware init
*/
if (ISSET(zst->zst_hwflags, ZS_HWFLAG_CONSOLE)) {
/* Call zsparam similar to open. */
/* Wait a while for previous console output to complete */
DELAY(10000);
} else if (!ISSET(zst->zst_hwflags, ZS_HWFLAG_NORESET)) {
/* Not the console; may need reset. */
int reset;
reset = (channel == 0) ? ZSWR9_A_RESET : ZSWR9_B_RESET;
s = splzs();
zs_write_reg(cs, 9, reset);
splx(s);
}
/*
* Probe for a keyboard.
* If one is found, turn on receiver and status interrupts.
* We defer the actual write of the register to zsparam(),
* but we must make sure status interrupts are turned on by
* the time zsparam() reads the initial rr0 state.
*/
if (zskbd_init(zst)) {
SET(cs->cs_preg[1], ZSWR1_RIE | ZSWR1_SIE);
zs_write_reg(cs, 1, cs->cs_creg[1]);
/* Make sure DTR is on now. */
s = splzs();
zs_modem(zst, 1);
splx(s);
} else {
/* Will raise DTR in open. */
s = splzs();
zs_modem(zst, 0);
splx(s);
return;
}
ss->sc_click =
strcmp(getpropstring(optionsnode, "keyboard-click?"), "true") == 0;
sunkbd_setclick(ss, ss->sc_click);
a.console = console;
if (ISTYPE5(ss->sc_layout)) {
a.keymap = &sunkbd5_keymapdata;
#ifndef SUNKBD5_LAYOUT
if (ss->sc_layout < MAXSUNLAYOUT &&
sunkbd_layouts[ss->sc_layout] != -1)
sunkbd5_keymapdata.layout =
sunkbd_layouts[ss->sc_layout];
#endif
} else {
a.keymap = &sunkbd_keymapdata;
#ifndef SUNKBD_LAYOUT
if (ss->sc_layout < MAXSUNLAYOUT &&
sunkbd_layouts[ss->sc_layout] != -1)
sunkbd_keymapdata.layout =
sunkbd_layouts[ss->sc_layout];
#endif
}
a.accessops = &sunkbd_accessops;
a.accesscookie = zst;
if (console)
wskbd_cnattach(&zskbd_consops, zst, a.keymap);
ss->sc_wskbddev = config_found(self, &a, wskbddevprint);
}
int
zskbd_init(zst)
struct zskbd_softc *zst;
{
struct sunkbd_softc *ss = (void *)zst;
struct zs_chanstate *cs = zst->zst_cs;
int s, tries;
u_int8_t v3, v4, v5, rr0;
/* setup for 1200n81 */
if (zs_set_speed(cs, 1200)) { /* set 1200bps */
printf(": failed to set baudrate\n");
return 0;
}
if (zs_set_modes(cs, CS8 | CLOCAL)) {
printf(": failed to set modes\n");
return 0;
}
s = splzs();
zs_maskintr(zst);
v3 = cs->cs_preg[3]; /* set 8 bit chars */
v5 = cs->cs_preg[5];
CLR(v3, ZSWR3_RXSIZE);
CLR(v5, ZSWR5_TXSIZE);
SET(v3, ZSWR3_RX_8);
SET(v5, ZSWR5_TX_8);
cs->cs_preg[3] = v3;
cs->cs_preg[5] = v5;
v4 = cs->cs_preg[4]; /* no parity 1 stop */
CLR(v4, ZSWR4_SBMASK | ZSWR4_PARMASK);
SET(v4, ZSWR4_ONESB | ZSWR4_EVENP);
cs->cs_preg[4] = v4;
if (!cs->cs_heldchange) {
if (zst->zst_tx_busy) {
zst->zst_heldtbc = zst->zst_tbc;
zst->zst_tbc = 0;
cs->cs_heldchange = 1;
} else
zs_loadchannelregs(cs);
}
/*
* Hardware flow control is disabled, turn off the buffer water
* marks and unblock any soft flow control state. Otherwise, enable
* the water marks.
*/
zst->zst_r_hiwat = 0;
zst->zst_r_lowat = 0;
if (ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
CLR(zst->zst_rx_flags, RX_TTY_OVERFLOWED);
zst->zst_rx_ready = 1;
cs->cs_softreq = 1;
}
if (ISSET(zst->zst_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) {
CLR(zst->zst_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED);
zs_hwiflow(zst);
}
/*
* Force a recheck of the hardware carrier and flow control status,
* since we may have changed which bits we're looking at.
*/
zskbd_stint(cs, 1);
splx(s);
/*
* Hardware flow control is disabled, unblock any hard flow control
* state.
*/
if (zst->zst_tx_stopped) {
zst->zst_tx_stopped = 0;
zsstart_tx(zst);
}
zskbd_softint(cs);
/* Ok, start the reset sequence... */
s = splhigh();
for (tries = 5; tries != 0; tries--) {
int ltries;
ss->sc_leds = 0;
ss->sc_layout = -1;
/* Send reset request */
zskbd_putc(zst, SKBD_CMD_RESET);
ltries = 1000;
while (--ltries > 0) {
rr0 = *cs->cs_reg_csr;
if (rr0 & ZSRR0_RX_READY) {
sunkbd_raw(ss, *cs->cs_reg_data);
if (ss->sc_kbdstate == SKBD_STATE_RESET)
break;
}
DELAY(1000);
}
if (ltries == 0)
continue;
/* Wait for reset to finish. */
ltries = 1000;
while (--ltries > 0) {
rr0 = *cs->cs_reg_csr;
if (rr0 & ZSRR0_RX_READY) {
sunkbd_raw(ss, *cs->cs_reg_data);
if (ss->sc_kbdstate == SKBD_STATE_GETKEY)
break;
}
DELAY(1000);
}
if (ltries == 0)
continue;
/* Send layout request */
zskbd_putc(zst, SKBD_CMD_LAYOUT);
ltries = 1000;
while (--ltries > 0) {
rr0 = *cs->cs_reg_csr;
if (rr0 & ZSRR0_RX_READY) {
sunkbd_raw(ss, *cs->cs_reg_data);
if (ss->sc_layout != -1)
break;
}
DELAY(1000);
}
if (ltries == 0)
continue;
break;
}
if (tries == 0)
printf(": no keyboard\n");
else
printf(": layout %d\n", ss->sc_layout);
splx(s);
return tries;
}
void
zskbd_putc(zst, c)
struct zskbd_softc *zst;
u_int8_t c;
{
u_int8_t rr0;
int s;
s = splhigh();
do {
rr0 = *zst->zst_cs->cs_reg_csr;
} while ((rr0 & ZSRR0_TX_READY) == 0);
*zst->zst_cs->cs_reg_data = c;
delay(2);
splx(s);
}
int
zsenqueue_tx(v, str, len)
void *v;
u_int8_t *str;
u_int len;
{
struct zskbd_softc *zst = v;
int s;
u_int i;
s = splzs();
if (zst->zst_tbc + len > ZSKBD_RING_SIZE)
return (-1);
zst->zst_tbc += len;
for (i = 0; i < len; i++) {
*zst->zst_tbp = str[i];
if (++zst->zst_tbp == zst->zst_tend)
zst->zst_tbp = zst->zst_tbeg;
}
splx(s);
zsstart_tx(zst);
return (0);
}
void
zsstart_tx(zst)
struct zskbd_softc *zst;
{
struct zs_chanstate *cs = zst->zst_cs;
int s, s1;
s = spltty();
if (zst->zst_tx_stopped)
goto out;
if (zst->zst_tbc == 0)
goto out;
s1 = splzs();
zst->zst_tx_busy = 1;
if (!ISSET(cs->cs_preg[1], ZSWR1_TIE)) {
SET(cs->cs_preg[1], ZSWR1_TIE);
cs->cs_creg[1] = cs->cs_preg[1];
zs_write_reg(cs, 1, cs->cs_creg[1]);
}
zs_write_data(cs, *zst->zst_tba);
zst->zst_tbc--;
if (++zst->zst_tba == zst->zst_tend)
zst->zst_tba = zst->zst_tbeg;
splx(s1);
out:
splx(s);
}
/*
* Compute interrupt enable bits and set in the pending bits. Called both
* in zsparam() and when PPS (pulse per second timing) state changes.
* Must be called at splzs().
*/
static void
zs_maskintr(zst)
struct zskbd_softc *zst;
{
struct zs_chanstate *cs = zst->zst_cs;
int tmp15;
cs->cs_rr0_mask = cs->cs_rr0_cts | cs->cs_rr0_dcd;
if (zst->zst_ppsmask != 0)
cs->cs_rr0_mask |= cs->cs_rr0_pps;
tmp15 = cs->cs_preg[15];
if (ISSET(cs->cs_rr0_mask, ZSRR0_DCD))
SET(tmp15, ZSWR15_DCD_IE);
else
CLR(tmp15, ZSWR15_DCD_IE);
if (ISSET(cs->cs_rr0_mask, ZSRR0_CTS))
SET(tmp15, ZSWR15_CTS_IE);
else
CLR(tmp15, ZSWR15_CTS_IE);
cs->cs_preg[15] = tmp15;
}
/*
* Raise or lower modem control (DTR/RTS) signals. If a character is
* in transmission, the change is deferred.
*/
static void
zs_modem(zst, onoff)
struct zskbd_softc *zst;
int onoff;
{
struct zs_chanstate *cs = zst->zst_cs;
if (cs->cs_wr5_dtr == 0)
return;
if (onoff)
SET(cs->cs_preg[5], cs->cs_wr5_dtr);
else
CLR(cs->cs_preg[5], cs->cs_wr5_dtr);
if (!cs->cs_heldchange) {
if (zst->zst_tx_busy) {
zst->zst_heldtbc = zst->zst_tbc;
zst->zst_tbc = 0;
cs->cs_heldchange = 1;
} else
zs_loadchannelregs(cs);
}
}
/*
* Internal version of zshwiflow
* called at splzs
*/
static void
zs_hwiflow(zst)
struct zskbd_softc *zst;
{
struct zs_chanstate *cs = zst->zst_cs;
if (cs->cs_wr5_rts == 0)
return;
if (ISSET(zst->zst_rx_flags, RX_ANY_BLOCK)) {
CLR(cs->cs_preg[5], cs->cs_wr5_rts);
CLR(cs->cs_creg[5], cs->cs_wr5_rts);
} else {
SET(cs->cs_preg[5], cs->cs_wr5_rts);
SET(cs->cs_creg[5], cs->cs_wr5_rts);
}
zs_write_reg(cs, 5, cs->cs_creg[5]);
}
/****************************************************************
* Interface to the lower layer (zscc)
****************************************************************/
#define integrate
integrate void zskbd_rxsoft(struct zskbd_softc *);
integrate void zskbd_txsoft(struct zskbd_softc *);
integrate void zskbd_stsoft(struct zskbd_softc *);
/*
* receiver ready interrupt.
* called at splzs
*/
static void
zskbd_rxint(cs)
struct zs_chanstate *cs;
{
struct zskbd_softc *zst = cs->cs_private;
u_char *put, *end;
u_int cc;
u_char rr0, rr1, c;
end = zst->zst_ebuf;
put = zst->zst_rbput;
cc = zst->zst_rbavail;
while (cc > 0) {
/*
* First read the status, because reading the received char
* destroys the status of this char.
*/
rr1 = zs_read_reg(cs, 1);
c = zs_read_data(cs);
if (ISSET(rr1, ZSRR1_FE | ZSRR1_DO | ZSRR1_PE)) {
/* Clear the receive error. */
zs_write_csr(cs, ZSWR0_RESET_ERRORS);
}
put[0] = c;
put[1] = rr1;
put += 2;
if (put >= end)
put = zst->zst_rbuf;
cc--;
rr0 = zs_read_csr(cs);
if (!ISSET(rr0, ZSRR0_RX_READY))
break;
}
/*
* 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.
*/
zst->zst_rbput = put;
zst->zst_rbavail = cc;
if (!ISSET(zst->zst_rx_flags, RX_TTY_OVERFLOWED)) {
zst->zst_rx_ready = 1;
cs->cs_softreq = 1;
}
/*
* See if we are in danger of overflowing a buffer. If
* so, use hardware flow control to ease the pressure.
*/
if (!ISSET(zst->zst_rx_flags, RX_IBUF_BLOCKED) &&
cc < zst->zst_r_hiwat) {
SET(zst->zst_rx_flags, RX_IBUF_BLOCKED);
zs_hwiflow(zst);
}
/*
* If we're out of space, disable receive interrupts
* until the queue has drained a bit.
*/
if (!cc) {
SET(zst->zst_rx_flags, RX_IBUF_OVERFLOWED);
CLR(cs->cs_preg[1], ZSWR1_RIE);
cs->cs_creg[1] = cs->cs_preg[1];
zs_write_reg(cs, 1, cs->cs_creg[1]);
}
}
/*
* transmitter ready interrupt. (splzs)
*/
static void
zskbd_txint(cs)
struct zs_chanstate *cs;
{
struct zskbd_softc *zst = cs->cs_private;
/*
* If we've delayed a parameter change, do it now, and restart
* output.
*/
if (cs->cs_heldchange) {
zs_loadchannelregs(cs);
cs->cs_heldchange = 0;
zst->zst_tbc = zst->zst_heldtbc;
zst->zst_heldtbc = 0;
}
/* Output the next character in the buffer, if any. */
if (zst->zst_tbc > 0) {
zs_write_data(cs, *zst->zst_tba);
zst->zst_tbc--;
if (++zst->zst_tba == zst->zst_tend)
zst->zst_tba = zst->zst_tbeg;
} else {
/* Disable transmit completion interrupts if necessary. */
if (ISSET(cs->cs_preg[1], ZSWR1_TIE)) {
CLR(cs->cs_preg[1], ZSWR1_TIE);
cs->cs_creg[1] = cs->cs_preg[1];
zs_write_reg(cs, 1, cs->cs_creg[1]);
}
if (zst->zst_tx_busy) {
zst->zst_tx_busy = 0;
zst->zst_tx_done = 1;
cs->cs_softreq = 1;
}
}
}
/*
* status change interrupt. (splzs)
*/
static void
zskbd_stint(cs, force)
struct zs_chanstate *cs;
int force;
{
struct zskbd_softc *zst = cs->cs_private;
u_char rr0, delta;
rr0 = zs_read_csr(cs);
zs_write_csr(cs, ZSWR0_RESET_STATUS);
/*
* Check here for console break, so that we can abort
* even when interrupts are locking up the machine.
*/
if (!force)
delta = rr0 ^ cs->cs_rr0;
else
delta = cs->cs_rr0_mask;
cs->cs_rr0 = rr0;
if (ISSET(delta, cs->cs_rr0_mask)) {
SET(cs->cs_rr0_delta, delta);
/*
* Stop output immediately if we lose the output
* flow control signal or carrier detect.
*/
if (ISSET(~rr0, cs->cs_rr0_mask)) {
zst->zst_tbc = 0;
zst->zst_heldtbc = 0;
}
zst->zst_st_check = 1;
cs->cs_softreq = 1;
}
}
void
zskbd_diag(arg)
void *arg;
{
struct zskbd_softc *zst = arg;
struct sunkbd_softc *ss = arg;
int overflows, floods;
int s;
s = splzs();
overflows = zst->zst_overflows;
zst->zst_overflows = 0;
floods = zst->zst_floods;
zst->zst_floods = 0;
zst->zst_errors = 0;
splx(s);
log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n",
ss->sc_dev.dv_xname,
overflows, overflows == 1 ? "" : "s",
floods, floods == 1 ? "" : "s");
}
integrate void
zskbd_rxsoft(zst)
struct zskbd_softc *zst;
{
struct sunkbd_softc *ss = (void *)zst;
struct zs_chanstate *cs = zst->zst_cs;
u_char *get, *end;
u_int cc, scc, type;
u_char rr1;
int code, value;
int s;
end = zst->zst_ebuf;
get = zst->zst_rbget;
scc = cc = zskbd_rbuf_size - zst->zst_rbavail;
if (cc == zskbd_rbuf_size) {
zst->zst_floods++;
if (zst->zst_errors++ == 0)
timeout_add(&zst->zst_diag_ch, 60 * hz);
}
while (cc) {
code = get[0];
rr1 = get[1];
if (ISSET(rr1, ZSRR1_DO | ZSRR1_FE | ZSRR1_PE)) {
if (ISSET(rr1, ZSRR1_DO)) {
zst->zst_overflows++;
if (zst->zst_errors++ == 0)
timeout_add(&zst->zst_diag_ch, 60 * hz);
}
if (ISSET(rr1, ZSRR1_FE))
SET(code, TTY_FE);
if (ISSET(rr1, ZSRR1_PE))
SET(code, TTY_PE);
}
sunkbd_decode(code, &type, &value);
wskbd_input(ss->sc_wskbddev, type, value);
get += 2;
if (get >= end)
get = zst->zst_rbuf;
cc--;
}
if (cc != scc) {
zst->zst_rbget = get;
s = splzs();
cc = zst->zst_rbavail += scc - cc;
/* Buffers should be ok again, release possible block. */
if (cc >= zst->zst_r_lowat) {
if (ISSET(zst->zst_rx_flags, RX_IBUF_OVERFLOWED)) {
CLR(zst->zst_rx_flags, RX_IBUF_OVERFLOWED);
SET(cs->cs_preg[1], ZSWR1_RIE);
cs->cs_creg[1] = cs->cs_preg[1];
zs_write_reg(cs, 1, cs->cs_creg[1]);
}
if (ISSET(zst->zst_rx_flags, RX_IBUF_BLOCKED)) {
CLR(zst->zst_rx_flags, RX_IBUF_BLOCKED);
zs_hwiflow(zst);
}
}
splx(s);
}
}
integrate void
zskbd_txsoft(zst)
struct zskbd_softc *zst;
{
}
integrate void
zskbd_stsoft(zst)
struct zskbd_softc *zst;
{
struct zs_chanstate *cs = zst->zst_cs;
u_char rr0, delta;
int s;
s = splzs();
rr0 = cs->cs_rr0;
delta = cs->cs_rr0_delta;
cs->cs_rr0_delta = 0;
splx(s);
if (ISSET(delta, cs->cs_rr0_cts)) {
/* Block or unblock output according to flow control. */
if (ISSET(rr0, cs->cs_rr0_cts))
zst->zst_tx_stopped = 0;
else
zst->zst_tx_stopped = 1;
}
}
/*
* Software interrupt. Called at zssoft
*
* The main job to be done here is to empty the input ring
* by passing its contents up to the tty layer. The ring is
* always emptied during this operation, therefore the ring
* must not be larger than the space after "high water" in
* the tty layer, or the tty layer might drop our input.
*
* Note: an "input blockage" condition is assumed to exist if
* EITHER the TS_TBLOCK flag or zst_rx_blocked flag is set.
*/
static void
zskbd_softint(cs)
struct zs_chanstate *cs;
{
struct zskbd_softc *zst = cs->cs_private;
int s;
s = spltty();
if (zst->zst_rx_ready) {
zst->zst_rx_ready = 0;
zskbd_rxsoft(zst);
}
if (zst->zst_st_check) {
zst->zst_st_check = 0;
zskbd_stsoft(zst);
}
if (zst->zst_tx_done) {
zst->zst_tx_done = 0;
zskbd_txsoft(zst);
}
splx(s);
}
struct zsops zsops_kbd = {
zskbd_rxint, /* receive char available */
zskbd_stint, /* external/status */
zskbd_txint, /* xmit buffer empty */
zskbd_softint, /* process software interrupt */
};
void
zskbd_cnpollc(v, on)
void *v;
int on;
{
extern int swallow_zsintrs;
if (on)
swallow_zsintrs++;
else
swallow_zsintrs--;
}
void
zskbd_cngetc(v, type, data)
void *v;
u_int *type;
int *data;
{
struct zskbd_softc *zst = v;
int s;
u_int8_t c, rr0;
s = splhigh();
do {
rr0 = *zst->zst_cs->cs_reg_csr;
} while ((rr0 & ZSRR0_RX_READY) == 0);
c = *zst->zst_cs->cs_reg_data;
splx(s);
switch (c) {
case SKBD_RSP_IDLE:
*type = WSCONS_EVENT_ALL_KEYS_UP;
*data = 0;
break;
default:
*type = (c & 0x80) ?
WSCONS_EVENT_KEY_UP : WSCONS_EVENT_KEY_DOWN;
*data = c & 0x7f;
break;
}
}
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