File: [local] / sys / arch / hp300 / dev / hpib.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:05:41 2008 UTC (16 years, 5 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: hpib.c,v 1.13 2005/11/16 21:23:55 miod Exp $ */
/* $NetBSD: hpib.c,v 1.16 1997/04/27 20:58:57 thorpej Exp $ */
/*
* Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
* 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.
*
* @(#)hpib.c 8.2 (Berkeley) 1/12/94
*/
/*
* HP-IB bus driver
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <hp300/dev/dmavar.h>
#include <hp300/dev/hpibvar.h>
#include <machine/cpu.h>
#include <machine/hp300spu.h>
int hpibbusmatch(struct device *, void *, void *);
void hpibbusattach(struct device *, struct device *, void *);
struct cfattach hpibbus_ca = {
sizeof(struct hpibbus_softc), hpibbusmatch, hpibbusattach
};
struct cfdriver hpibbus_cd = {
NULL, "hpibbus", DV_DULL
};
void hpibbus_attach_children(struct hpibbus_softc *);
int hpibbussubmatch(struct device *, void *, void *);
int hpibbusprint(void *, const char *);
void hpibstart(void *);
void hpibdone(void *);
int hpibtimeout = 100000; /* # of status tests before we give up */
int hpibidtimeout = 10000; /* # of status tests for hpibid() calls */
int hpibdmathresh = 3; /* byte count beyond which to attempt dma */
/*
* HP-IB is essentially an IEEE 488 bus, with an HP command
* set (CS/80 on `newer' devices, Amigo on before-you-were-born
* devices) thrown on top. Devices that respond to CS/80 (and
* probably Amigo, too) are tagged with a 16-bit ID.
*
* HP-IB has a 2-level addressing scheme; slave, the analog
* of a SCSI ID, and punit, the analog of a SCSI LUN. Unfortunately,
* IDs are on a per-slave basis; punits are often used for disk
* drives that have an accompanying tape drive on the second punit.
*
* In addition, not all HP-IB devices speak CS/80 or Amigo.
* Examples of such devices are HP-IB plotters, which simply
* take raw plotter commands over 488. These devices do not
* have ID tags, and often the host cannot even tell if such
* a device is attached to the system!
*
* We nevertheless probe the whole (slave, punit) tuple space, since
* drivers for devices with a unique ID know exactly where to attach;
* and we disallow ``star'' locators for other drivers.
*/
int
hpibbusmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
return (1);
}
void
hpibbusattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct hpibbus_softc *sc = (struct hpibbus_softc *)self;
struct hpibdev_attach_args *ha = aux;
printf("\n");
/* Get the operations vector for the controller. */
sc->sc_ops = ha->ha_ops;
sc->sc_type = ha->ha_type; /* XXX */
sc->sc_ba = ha->ha_ba;
*(ha->ha_softcpp) = sc; /* XXX */
hpibreset(self->dv_unit); /* XXX souldn't be here */
/*
* Initialize the DMA queue entry.
*/
sc->sc_dq = (struct dmaqueue *)malloc(sizeof(struct dmaqueue),
M_DEVBUF, M_NOWAIT);
if (sc->sc_dq == NULL) {
printf("%s: can't allocate DMA queue entry\n", self->dv_xname);
return;
}
sc->sc_dq->dq_softc = sc;
sc->sc_dq->dq_start = hpibstart;
sc->sc_dq->dq_done = hpibdone;
/* Initialize the slave request queue. */
TAILQ_INIT(&sc->sc_queue);
/* Attach any devices on the bus. */
hpibbus_attach_children(sc);
}
void
hpibbus_attach_children(sc)
struct hpibbus_softc *sc;
{
struct hpibbus_attach_args ha;
int id, slave, punit;
int i;
for (slave = 0; slave < HPIB_NSLAVES; slave++) {
/*
* Get the ID tag for the device, if any.
* Plotters won't identify themselves, and
* get the same value as non-existent devices.
* However, aging HP-IB drives are slow to respond; try up
* to three times to get a valid ID.
*/
for (i = 0; i < 3; i++) {
id = hpibid(sc->sc_dev.dv_unit, slave);
if ((id & 0x200) != 0)
break;
delay(10000);
}
for (punit = 0; punit < HPIB_NPUNITS; punit++) {
/*
* Search through all configured children for this bus.
*/
ha.ha_id = id;
ha.ha_slave = slave;
ha.ha_punit = punit;
(void)config_found_sm(&sc->sc_dev, &ha, hpibbusprint,
hpibbussubmatch);
}
}
}
int
hpibbussubmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct hpibbus_attach_args *ha = aux;
if (cf->hpibbuscf_slave != HPIBBUS_SLAVE_UNK &&
cf->hpibbuscf_slave != ha->ha_slave)
return (0);
if (cf->hpibbuscf_punit != HPIBBUS_PUNIT_UNK &&
cf->hpibbuscf_punit != ha->ha_punit)
return (0);
return ((*cf->cf_attach->ca_match)(parent, match, aux));
}
int
hpibbusprint(aux, pnp)
void *aux;
const char *pnp;
{
struct hpibbus_attach_args *ha = aux;
if (pnp != NULL) {
if (ha->ha_id == 0 || ha->ha_punit != 0 /* XXX */)
return (QUIET);
printf("HP-IB device (id %04X) at %s", ha->ha_id, pnp);
}
printf(" slave %d punit %d", ha->ha_slave, ha->ha_punit);
return (UNCONF);
}
int
hpibdevprint(aux, pnp)
void *aux;
const char *pnp;
{
/* only hpibbus's can attach to hpibdev's -- easy. */
if (pnp != NULL)
printf("hpibbus at %s", pnp);
return (UNCONF);
}
void
hpibreset(unit)
int unit;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
(*sc->sc_ops->hpib_reset)(sc);
}
int
hpibreq(pdev, hq)
struct device *pdev;
struct hpibqueue *hq;
{
struct hpibbus_softc *sc = (struct hpibbus_softc *)pdev;
int s;
s = splhigh(); /* XXXthorpej */
TAILQ_INSERT_TAIL(&sc->sc_queue, hq, hq_list);
splx(s);
if (TAILQ_FIRST(&sc->sc_queue) == hq)
return (1);
return (0);
}
void
hpibfree(pdev, hq)
struct device *pdev;
struct hpibqueue *hq;
{
struct hpibbus_softc *sc = (struct hpibbus_softc *)pdev;
int s;
s = splhigh(); /* XXXthorpej */
TAILQ_REMOVE(&sc->sc_queue, hq, hq_list);
splx(s);
if ((hq = TAILQ_FIRST(&sc->sc_queue)) != NULL)
(*hq->hq_start)(hq->hq_softc);
}
int
hpibid(unit, slave)
int unit, slave;
{
short id;
int ohpibtimeout;
/*
* XXX shorten timeout value so autoconfig doesn't
* take forever on slow CPUs.
*/
ohpibtimeout = hpibtimeout;
hpibtimeout = hpibidtimeout * (cpuspeed / 8);
if (hpibrecv(unit, 31, slave, &id, 2) != 2)
id = 0;
hpibtimeout = ohpibtimeout;
return(id);
}
int
hpibsend(unit, slave, sec, addr, cnt)
int unit, slave, sec, cnt;
void *addr;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
return ((*sc->sc_ops->hpib_send)(sc, slave, sec, addr, cnt));
}
int
hpibrecv(unit, slave, sec, addr, cnt)
int unit, slave, sec, cnt;
void *addr;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
return ((*sc->sc_ops->hpib_recv)(sc, slave, sec, addr, cnt));
}
int
hpibpptest(unit, slave)
int unit;
int slave;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
return ((*sc->sc_ops->hpib_ppoll)(sc) & (0x80 >> slave));
}
void
hpibppclear(unit)
int unit;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
sc->sc_flags &= ~HPIBF_PPOLL;
}
void
hpibawait(unit)
int unit;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
sc->sc_flags |= HPIBF_PPOLL;
(*sc->sc_ops->hpib_ppwatch)(sc);
}
int
hpibswait(unit, slave)
int unit;
int slave;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
int timo = hpibtimeout;
int mask, (*ppoll)(struct hpibbus_softc *);
ppoll = sc->sc_ops->hpib_ppoll;
mask = 0x80 >> slave;
while (((*ppoll)(sc) & mask) == 0) {
if (--timo == 0) {
printf("%s: swait timeout\n", sc->sc_dev.dv_xname);
return(-1);
}
}
return(0);
}
int
hpibustart(unit)
int unit;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
if (sc->sc_type == HPIBA)
sc->sc_dq->dq_chan = DMA0;
else
sc->sc_dq->dq_chan = DMA0 | DMA1;
if (dmareq(sc->sc_dq))
return(1);
return(0);
}
void
hpibstart(arg)
void *arg;
{
struct hpibbus_softc *sc = arg;
struct hpibqueue *hq;
hq = TAILQ_FIRST(&sc->sc_queue);
(*hq->hq_go)(hq->hq_softc);
}
void
hpibgo(unit, slave, sec, vbuf, count, rw, timo)
int unit, slave, sec;
void *vbuf;
int count, rw, timo;
{
struct hpibbus_softc *sc = hpibbus_cd.cd_devs[unit];
(*sc->sc_ops->hpib_go)(sc, slave, sec, vbuf, count, rw, timo);
}
void
hpibdone(arg)
void *arg;
{
struct hpibbus_softc *sc = arg;
(*sc->sc_ops->hpib_done)(sc);
}
int
hpibintr(arg)
void *arg;
{
struct hpibbus_softc *sc = arg;
return ((sc->sc_ops->hpib_intr)(arg));
}