NetBSD-5.0.2/sys/arch/hp300/dev/nhpib.c
/* $NetBSD: nhpib.c,v 1.40 2008/04/28 20:23:19 martin Exp $ */
/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*/
/*
* Copyright (c) 1982, 1990, 1993
* The Regents of the University of California. 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. 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.
*
* @(#)nhpib.c 8.2 (Berkeley) 1/12/94
*/
/*
* Internal/98624 HPIB driver
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nhpib.c,v 1.40 2008/04/28 20:23:19 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <hp300/dev/intiovar.h>
#include <hp300/dev/diovar.h>
#include <hp300/dev/diodevs.h>
#include <hp300/dev/dmavar.h>
#include <hp300/dev/nhpibreg.h>
#include <hp300/dev/hpibvar.h>
/*
* ODD parity table for listen and talk addresses and secondary commands.
* The TI9914A doesn't produce the parity bit.
*/
static const u_char listnr_par[] = {
0040,0241,0242,0043,0244,0045,0046,0247,
0250,0051,0052,0253,0054,0255,0256,0057,
0260,0061,0062,0263,0064,0265,0266,0067,
0070,0271,0272,0073,0274,0075,0076,0277,
};
static const u_char talker_par[] = {
0100,0301,0302,0103,0304,0105,0106,0307,
0310,0111,0112,0313,0114,0315,0316,0117,
0320,0121,0122,0323,0124,0325,0326,0127,
0130,0331,0332,0133,0334,0135,0136,0337,
};
static const u_char sec_par[] = {
0340,0141,0142,0343,0144,0345,0346,0147,
0150,0351,0352,0153,0354,0155,0156,0357,
0160,0361,0362,0163,0364,0165,0166,0367,
0370,0171,0172,0373,0174,0375,0376,0177
};
static void nhpibifc(struct nhpibdevice *);
static void nhpibreadtimo(void *);
static int nhpibwait(struct nhpibdevice *, int);
static void nhpibreset(struct hpibbus_softc *);
static int nhpibsend(struct hpibbus_softc *, int, int, void *, int);
static int nhpibrecv(struct hpibbus_softc *, int, int, void *, int);
static int nhpibppoll(struct hpibbus_softc *);
static void nhpibppwatch(void *);
static void nhpibgo(struct hpibbus_softc *, int, int, void *, int, int,
int);
static void nhpibdone(struct hpibbus_softc *);
static int nhpibintr(void *);
/*
* Our controller ops structure.
*/
static struct hpib_controller nhpib_controller = {
nhpibreset,
nhpibsend,
nhpibrecv,
nhpibppoll,
nhpibppwatch,
nhpibgo,
nhpibdone,
nhpibintr
};
struct nhpib_softc {
device_t sc_dev; /* generic device glue */
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
struct nhpibdevice *sc_regs; /* device registers */
struct hpibbus_softc *sc_hpibbus; /* XXX */
int sc_myaddr;
int sc_type;
struct callout sc_read_ch;
struct callout sc_ppwatch_ch;
};
static int nhpib_dio_match(device_t, cfdata_t, void *);
static void nhpib_dio_attach(device_t, device_t, void *);
static int nhpib_intio_match(device_t, cfdata_t, void *);
static void nhpib_intio_attach(device_t, device_t, void *);
static void nhpib_common_attach(struct nhpib_softc *, const char *);
CFATTACH_DECL_NEW(nhpib_dio, sizeof(struct nhpib_softc),
nhpib_dio_match, nhpib_dio_attach, NULL, NULL);
CFATTACH_DECL_NEW(nhpib_intio, sizeof(struct nhpib_softc),
nhpib_intio_match, nhpib_intio_attach, NULL, NULL);
static int
nhpib_intio_match(device_t parent, cfdata_t cf, void *aux)
{
struct intio_attach_args *ia = aux;
if (strcmp("hpib", ia->ia_modname) == 0)
return 1;
return 0;
}
static int
nhpib_dio_match(device_t parent, cfdata_t cf, void *aux)
{
struct dio_attach_args *da = aux;
if (da->da_id == DIO_DEVICE_ID_NHPIB)
return 1;
return 0;
}
static void
nhpib_intio_attach(device_t parent, device_t self, void *aux)
{
struct nhpib_softc *sc = device_private(self);
struct intio_attach_args *ia = aux;
bus_space_tag_t bst = ia->ia_bst;
const char *desc = "internal HP-IB";
sc->sc_dev = self;
if (bus_space_map(bst, ia->ia_iobase, INTIO_DEVSIZE, 0, &sc->sc_bsh)) {
aprint_error(": can't map registers\n");
return;
}
sc->sc_bst = bst;
sc->sc_myaddr = HPIBA_BA;
sc->sc_type = HPIBA;
nhpib_common_attach(sc, desc);
/* establish the interrupt handler */
(void)intio_intr_establish(nhpibintr, sc, ia->ia_ipl, IPL_BIO);
}
static void
nhpib_dio_attach(device_t parent, device_t self, void *aux)
{
struct nhpib_softc *sc = device_private(self);
struct dio_attach_args *da = aux;
bus_space_tag_t bst = da->da_bst;
const char *desc = DIO_DEVICE_DESC_NHPIB;
sc->sc_dev = self;
if (bus_space_map(bst, da->da_addr, da->da_size, 0, &sc->sc_bsh)) {
aprint_error(": can't map registers\n");
return;
}
sc->sc_dev = self;
sc->sc_bst = bst;
/* read address off switches */
sc->sc_myaddr = bus_space_read_1(sc->sc_bst, sc->sc_bsh, 5);
sc->sc_type = HPIBB;
nhpib_common_attach(sc, desc);
/* establish the interrupt handler */
(void)dio_intr_establish(nhpibintr, sc, da->da_ipl, IPL_BIO);
}
static void
nhpib_common_attach(struct nhpib_softc *sc, const char *desc)
{
struct hpibdev_attach_args ha;
aprint_normal(": %s\n", desc);
sc->sc_regs = bus_space_vaddr(sc->sc_bst, sc->sc_bsh);
callout_init(&sc->sc_read_ch, 0);
callout_init(&sc->sc_ppwatch_ch, 0);
ha.ha_ops = &nhpib_controller;
ha.ha_type = sc->sc_type; /* XXX */
ha.ha_ba = sc->sc_myaddr;
ha.ha_softcpp = &sc->sc_hpibbus; /* XXX */
(void)config_found(sc->sc_dev, &ha, hpibdevprint);
}
static void
nhpibreset(struct hpibbus_softc *hs)
{
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
struct nhpibdevice *hd = sc->sc_regs;
hd->hpib_acr = AUX_SSWRST;
hd->hpib_ar = hs->sc_ba;
hd->hpib_lim = LIS_ERR;
hd->hpib_mim = 0;
hd->hpib_acr = AUX_CDAI;
hd->hpib_acr = AUX_CSHDW;
hd->hpib_acr = AUX_SSTD1;
hd->hpib_acr = AUX_SVSTD1;
hd->hpib_acr = AUX_CPP;
hd->hpib_acr = AUX_CHDFA;
hd->hpib_acr = AUX_CHDFE;
hd->hpib_acr = AUX_RHDF;
hd->hpib_acr = AUX_CSWRST;
nhpibifc(hd);
hd->hpib_ie = IDS_IE;
hd->hpib_data = C_DCL_P;
DELAY(100000);
}
static void
nhpibifc(struct nhpibdevice *hd)
{
hd->hpib_acr = AUX_TCA;
hd->hpib_acr = AUX_CSRE;
hd->hpib_acr = AUX_SSIC;
DELAY(100);
hd->hpib_acr = AUX_CSIC;
hd->hpib_acr = AUX_SSRE;
}
static int
nhpibsend(struct hpibbus_softc *hs, int slave, int sec, void *ptr, int origcnt)
{
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
struct nhpibdevice *hd = sc->sc_regs;
int cnt = origcnt;
char *addr = ptr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL_P;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_data = talker_par[hs->sc_ba];
hd->hpib_acr = AUX_STON;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_data = listnr_par[slave];
if (nhpibwait(hd, MIS_BO))
goto senderror;
if (sec >= 0 || sec == -2) {
if (sec == -2) /* selected device clear KLUDGE */
hd->hpib_data = C_SDC_P;
else
hd->hpib_data = sec_par[sec];
if (nhpibwait(hd, MIS_BO))
goto senderror;
}
hd->hpib_acr = AUX_GTS;
if (cnt) {
while (--cnt > 0) {
hd->hpib_data = *addr++;
if (nhpibwait(hd, MIS_BO))
goto senderror;
}
hd->hpib_acr = AUX_EOI;
hd->hpib_data = *addr;
if (nhpibwait(hd, MIS_BO))
goto senderror;
hd->hpib_acr = AUX_TCA;
#if 0
/*
* May be causing 345 disks to hang due to interference
* with PPOLL mechanism.
*/
hd->hpib_data = C_UNL_P;
(void) nhpibwait(hd, MIS_BO);
#endif
}
return origcnt;
senderror:
nhpibifc(hd);
return origcnt - cnt - 1;
}
static int
nhpibrecv(struct hpibbus_softc *hs, int slave, int sec, void *ptr, int origcnt)
{
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
struct nhpibdevice *hd = sc->sc_regs;
int cnt = origcnt;
char *addr = ptr;
/*
* Slave < 0 implies continuation of a previous receive
* that probably timed out.
*/
if (slave >= 0) {
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL_P;
if (nhpibwait(hd, MIS_BO))
goto recverror;
hd->hpib_data = listnr_par[hs->sc_ba];
hd->hpib_acr = AUX_SLON;
if (nhpibwait(hd, MIS_BO))
goto recverror;
hd->hpib_data = talker_par[slave];
if (nhpibwait(hd, MIS_BO))
goto recverror;
if (sec >= 0) {
hd->hpib_data = sec_par[sec];
if (nhpibwait(hd, MIS_BO))
goto recverror;
}
hd->hpib_acr = AUX_RHDF;
hd->hpib_acr = AUX_GTS;
}
if (cnt) {
while (--cnt >= 0) {
if (nhpibwait(hd, MIS_BI))
goto recvbyteserror;
*addr++ = hd->hpib_data;
}
hd->hpib_acr = AUX_TCA;
hd->hpib_data = (slave == 31) ? C_UNA_P : C_UNT_P;
(void) nhpibwait(hd, MIS_BO);
}
return origcnt;
recverror:
nhpibifc(hd);
recvbyteserror:
return origcnt - cnt - 1;
}
static void
nhpibgo(struct hpibbus_softc *hs, int slave, int sec, void *ptr, int count,
int rw, int timo)
{
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
struct nhpibdevice *hd = sc->sc_regs;
char *addr = ptr;
hs->sc_flags |= HPIBF_IO;
if (timo)
hs->sc_flags |= HPIBF_TIMO;
if (rw == B_READ)
hs->sc_flags |= HPIBF_READ;
#ifdef DEBUG
else if (hs->sc_flags & HPIBF_READ) {
printf("nhpibgo: HPIBF_READ still set\n");
hs->sc_flags &= ~HPIBF_READ;
}
#endif
hs->sc_count = count;
hs->sc_addr = addr;
if (hs->sc_flags & HPIBF_READ) {
hs->sc_curcnt = count;
dmago(hs->sc_dq->dq_chan, addr, count, DMAGO_BYTE|DMAGO_READ);
nhpibrecv(hs, slave, sec, 0, 0);
hd->hpib_mim = MIS_END;
} else {
hd->hpib_mim = 0;
if (count < hpibdmathresh) {
hs->sc_curcnt = count;
nhpibsend(hs, slave, sec, addr, count);
nhpibdone(hs);
return;
}
hs->sc_curcnt = --count;
dmago(hs->sc_dq->dq_chan, addr, count, DMAGO_BYTE);
nhpibsend(hs, slave, sec, 0, 0);
}
hd->hpib_ie = IDS_IE | IDS_DMA(hs->sc_dq->dq_chan);
}
/*
* This timeout can only happen if a DMA read finishes DMAing with the read
* still pending (more data in read transaction than the driver was prepared
* to accept). At the moment, variable-record tape drives are the only things
* capabale of doing this. We repeat the necessary code from nhpibintr() -
* easier and quicker than calling nhpibintr() for this special case.
*/
static void
nhpibreadtimo(void *arg)
{
struct hpibbus_softc *hs = arg;
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
int s = splbio();
if (hs->sc_flags & HPIBF_IO) {
struct nhpibdevice *hd = sc->sc_regs;
struct hpibqueue *hq;
hd->hpib_mim = 0;
hd->hpib_acr = AUX_TCA;
hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO);
dmafree(hs->sc_dq);
hq = TAILQ_FIRST(&hs->sc_queue);
(hq->hq_intr)(hq->hq_softc);
}
splx(s);
}
static void
nhpibdone(struct hpibbus_softc *hs)
{
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
struct nhpibdevice *hd = sc->sc_regs;
int cnt;
cnt = hs->sc_curcnt;
hs->sc_addr += cnt;
hs->sc_count -= cnt;
hs->sc_flags |= HPIBF_DONE;
hd->hpib_ie = IDS_IE;
if (hs->sc_flags & HPIBF_READ) {
if ((hs->sc_flags & HPIBF_TIMO) &&
(hd->hpib_ids & IDS_IR) == 0)
callout_reset(&sc->sc_read_ch, hz >> 2,
nhpibreadtimo, hs);
} else {
if (hs->sc_count == 1) {
(void) nhpibwait(hd, MIS_BO);
hd->hpib_acr = AUX_EOI;
hd->hpib_data = *hs->sc_addr;
hd->hpib_mim = MIS_BO;
}
#ifdef DEBUG
else if (hs->sc_count)
panic("nhpibdone");
#endif
}
}
static int
nhpibintr(void *arg)
{
struct nhpib_softc *sc = arg;
struct hpibbus_softc *hs = sc->sc_hpibbus;
struct nhpibdevice *hd = sc->sc_regs;
struct hpibqueue *hq;
int stat0;
int stat1;
#ifdef lint
if (stat1 = unit)
return 1;
#endif
if ((hd->hpib_ids & IDS_IR) == 0)
return 0;
stat0 = hd->hpib_mis;
stat1 = hd->hpib_lis;
hq = TAILQ_FIRST(&hs->sc_queue);
if (hs->sc_flags & HPIBF_IO) {
hd->hpib_mim = 0;
if ((hs->sc_flags & HPIBF_DONE) == 0) {
hs->sc_flags &= ~HPIBF_TIMO;
dmastop(hs->sc_dq->dq_chan);
} else if (hs->sc_flags & HPIBF_TIMO)
callout_stop(&sc->sc_read_ch);
hd->hpib_acr = AUX_TCA;
hs->sc_flags &= ~(HPIBF_DONE|HPIBF_IO|HPIBF_READ|HPIBF_TIMO);
dmafree(hs->sc_dq);
(hq->hq_intr)(hq->hq_softc);
} else if (hs->sc_flags & HPIBF_PPOLL) {
hd->hpib_mim = 0;
stat0 = nhpibppoll(hs);
if (stat0 & (0x80 >> hq->hq_slave)) {
hs->sc_flags &= ~HPIBF_PPOLL;
(hq->hq_intr)(hq->hq_softc);
}
#ifdef DEBUG
else
printf("%s: PPOLL intr bad status %x\n",
device_xname(hs->sc_dev), stat0);
#endif
}
return 1;
}
static int
nhpibppoll(struct hpibbus_softc *hs)
{
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
struct nhpibdevice *hd = sc->sc_regs;
int ppoll;
hd->hpib_acr = AUX_SPP;
DELAY(25);
ppoll = hd->hpib_cpt;
hd->hpib_acr = AUX_CPP;
return ppoll;
}
#ifdef DEBUG
int nhpibreporttimo = 0;
#endif
static int
nhpibwait(struct nhpibdevice *hd, int x)
{
int timo = hpibtimeout;
while ((hd->hpib_mis & x) == 0 && --timo)
DELAY(1);
if (timo == 0) {
#ifdef DEBUG
if (nhpibreporttimo)
printf("hpib0: %s timo\n", x==MIS_BO?"OUT":"IN");
#endif
return -1;
}
return 0;
}
static void
nhpibppwatch(void *arg)
{
struct hpibbus_softc *hs = arg;
struct nhpib_softc *sc = device_private(device_parent(hs->sc_dev));
if ((hs->sc_flags & HPIBF_PPOLL) == 0)
return;
again:
if (nhpibppoll(hs) & (0x80 >> TAILQ_FIRST(&hs->sc_queue)->hq_slave))
sc->sc_regs->hpib_mim = MIS_BO;
else if (cold)
/* timeouts not working yet */
goto again;
else
callout_reset(&sc->sc_ppwatch_ch, 1, nhpibppwatch, hs);
}