571 lines
13 KiB
C
571 lines
13 KiB
C
/* $NetBSD: gpib.c,v 1.19 2009/09/12 18:41:05 tsutsui Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2003 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Gregory McGarry.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: gpib.c,v 1.19 2009/09/12 18:41:05 tsutsui Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/device.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <dev/gpib/gpibvar.h>
|
|
|
|
#include <dev/gpib/gpibio.h> /* XXX */
|
|
|
|
#include "locators.h"
|
|
|
|
#ifndef DEBUG
|
|
#define DEBUG
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
int gpibdebug = 0xff;
|
|
#define DBG_FOLLOW 0x01
|
|
#define DBG_INTR 0x02
|
|
#define DBG_FAIL 0x04
|
|
#define DPRINTF(mask, str) if (gpibdebug & (mask)) printf str
|
|
#else
|
|
#define DPRINTF(mask, str) /* nothing */
|
|
#endif
|
|
|
|
int gpibmatch(device_t, cfdata_t, void *);
|
|
void gpibattach(device_t, device_t, void *);
|
|
|
|
CFATTACH_DECL(gpib, sizeof(struct gpib_softc),
|
|
gpibmatch, gpibattach, NULL, NULL);
|
|
|
|
static int gpibsubmatch1(device_t, cfdata_t,
|
|
const int *, void *);
|
|
static int gpibsubmatch2(device_t, cfdata_t,
|
|
const int *, void *);
|
|
static int gpibprint(void *, const char *);
|
|
|
|
dev_type_open(gpibopen);
|
|
dev_type_close(gpibclose);
|
|
dev_type_read(gpibread);
|
|
dev_type_write(gpibwrite);
|
|
dev_type_ioctl(gpibioctl);
|
|
dev_type_poll(gpibpoll);
|
|
|
|
const struct cdevsw gpib_cdevsw = {
|
|
gpibopen, gpibclose, gpibread, gpibwrite, gpibioctl,
|
|
nostop, notty, gpibpoll, nommap, nokqfilter, D_OTHER
|
|
};
|
|
|
|
extern struct cfdriver gpib_cd;
|
|
|
|
#define GPIBUNIT(dev) (minor(dev) & 0x0f)
|
|
|
|
int gpibtimeout = 100000; /* # of status tests before we give up */
|
|
|
|
int
|
|
gpibmatch(device_t parent, cfdata_t match, void *aux)
|
|
{
|
|
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
gpibattach(device_t parent, device_t self, void *aux)
|
|
{
|
|
struct gpib_softc *sc = device_private(self);
|
|
cfdata_t cf = device_cfdata(&sc->sc_dev);
|
|
struct gpibdev_attach_args *gda = aux;
|
|
struct gpib_attach_args ga;
|
|
int address;
|
|
|
|
sc->sc_ic = gda->ga_ic;
|
|
|
|
/*
|
|
* If the configuration file specified a host address, then
|
|
* use it in favour of registers/switches or the default (30).
|
|
*/
|
|
if (cf->cf_loc[GPIBDEVCF_ADDRESS] != GPIBDEVCF_ADDRESS_DEFAULT)
|
|
sc->sc_myaddr = cf->cf_loc[GPIBDEVCF_ADDRESS];
|
|
else if (gda->ga_address != GPIBDEVCF_ADDRESS_DEFAULT)
|
|
sc->sc_myaddr = gda->ga_address;
|
|
else
|
|
sc->sc_myaddr = 30;
|
|
|
|
printf(": host address %d\n", sc->sc_myaddr);
|
|
|
|
/* record our softc pointer */
|
|
sc->sc_ic->bus = sc;
|
|
|
|
/* Initialize the slave request queue */
|
|
TAILQ_INIT(&sc->sc_queue);
|
|
|
|
/* attach addressed devices */
|
|
for (address=0; address<GPIB_NDEVS; address++) {
|
|
ga.ga_ic = sc->sc_ic;
|
|
ga.ga_address = address;
|
|
(void) config_search_ia(gpibsubmatch1, &sc->sc_dev, "gpib", &ga);
|
|
}
|
|
|
|
/* attach the wild-carded devices - probably protocol busses */
|
|
ga.ga_ic = sc->sc_ic;
|
|
(void) config_search_ia(gpibsubmatch2, &sc->sc_dev, "gpib", &ga);
|
|
}
|
|
|
|
int
|
|
gpibsubmatch1(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
|
|
{
|
|
struct gpib_softc *sc = (struct gpib_softc *)parent;
|
|
struct gpib_attach_args *ga = aux;
|
|
|
|
if (cf->cf_loc[GPIBCF_ADDRESS] != ga->ga_address)
|
|
return (0);
|
|
|
|
if (cf->cf_loc[GPIBCF_ADDRESS] == sc->sc_myaddr)
|
|
return (0);
|
|
|
|
if (config_match(parent, cf, ga) > 0) {
|
|
if (gpib_alloc(sc, ga->ga_address))
|
|
return (0);
|
|
config_attach(parent, cf, ga, gpibprint);
|
|
return (0);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
gpibsubmatch2(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
|
|
{
|
|
struct gpib_attach_args *ga = aux;
|
|
|
|
if (cf->cf_loc[GPIBCF_ADDRESS] != GPIBCF_ADDRESS_DEFAULT)
|
|
return (0);
|
|
|
|
ga->ga_address = GPIBCF_ADDRESS_DEFAULT;
|
|
if (config_match(parent, cf, ga) > 0) {
|
|
config_attach(parent, cf, ga, gpibdevprint);
|
|
return (0);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
gpibprint(void *aux, const char *pnp)
|
|
{
|
|
struct gpib_attach_args *ga = aux;
|
|
|
|
if (ga->ga_address != GPIBCF_ADDRESS_DEFAULT)
|
|
printf(" address %d", ga->ga_address);
|
|
return (UNCONF);
|
|
}
|
|
|
|
int
|
|
gpibdevprint(void *aux, const char *pnp)
|
|
{
|
|
|
|
if (pnp != NULL)
|
|
printf("gpib at %s", pnp);
|
|
return (UNCONF);
|
|
}
|
|
|
|
/*
|
|
* Called by hardware driver, pass to device driver.
|
|
*/
|
|
int
|
|
gpibintr(void *v)
|
|
{
|
|
struct gpib_softc *sc = v;
|
|
gpib_handle_t hdl;
|
|
|
|
DPRINTF(DBG_INTR, ("gpibintr: sc=%p\n", sc));
|
|
|
|
hdl = TAILQ_FIRST(&sc->sc_queue);
|
|
(hdl->hq_callback)(hdl->hq_softc, GPIBCBF_INTR);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Create a callback handle.
|
|
*/
|
|
int
|
|
_gpibregister(struct gpib_softc *sc, int slave, gpib_callback_t callback, void *arg, gpib_handle_t *hdl)
|
|
{
|
|
|
|
*hdl = malloc(sizeof(struct gpibqueue), M_DEVBUF, M_NOWAIT);
|
|
if (*hdl == NULL) {
|
|
DPRINTF(DBG_FAIL, ("_gpibregister: can't allocate queue\n"));
|
|
return (1);
|
|
}
|
|
|
|
(*hdl)->hq_slave = slave;
|
|
(*hdl)->hq_callback = callback;
|
|
(*hdl)->hq_softc = arg;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Request exclusive access to the GPIB bus.
|
|
*/
|
|
int
|
|
_gpibrequest(struct gpib_softc *sc, gpib_handle_t hdl)
|
|
{
|
|
|
|
DPRINTF(DBG_FOLLOW, ("_gpibrequest: sc=%p hdl=%p\n", sc, hdl));
|
|
|
|
TAILQ_INSERT_TAIL(&sc->sc_queue, hdl, hq_list);
|
|
if (TAILQ_FIRST(&sc->sc_queue) == hdl)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Release exclusive access to the GPIB bus.
|
|
*/
|
|
void
|
|
_gpibrelease(struct gpib_softc *sc, gpib_handle_t hdl)
|
|
{
|
|
|
|
DPRINTF(DBG_FOLLOW, ("_gpibrelease: sc=%p hdl=%p\n", sc, hdl));
|
|
|
|
TAILQ_REMOVE(&sc->sc_queue, hdl, hq_list);
|
|
if ((hdl = TAILQ_FIRST(&sc->sc_queue)) != NULL)
|
|
(*hdl->hq_callback)(hdl->hq_softc, GPIBCBF_START);
|
|
}
|
|
|
|
|
|
/*
|
|
* Asynchronous wait.
|
|
*/
|
|
void
|
|
_gpibawait(struct gpib_softc *sc)
|
|
{
|
|
int slave;
|
|
|
|
DPRINTF(DBG_FOLLOW, ("_gpibawait: sc=%p\n", sc));
|
|
|
|
slave = TAILQ_FIRST(&sc->sc_queue)->hq_slave;
|
|
(*sc->sc_ic->ppwatch)(sc->sc_ic->cookie, slave);
|
|
}
|
|
|
|
/*
|
|
* Synchronous (spin) wait.
|
|
*/
|
|
int
|
|
_gpibswait(struct gpib_softc *sc, int slave)
|
|
{
|
|
int timo = gpibtimeout;
|
|
int (*pptest)(void *, int);
|
|
|
|
DPRINTF(DBG_FOLLOW, ("_gpibswait: sc=%p\n", sc));
|
|
|
|
pptest = sc->sc_ic->pptest;
|
|
while ((*pptest)(sc->sc_ic->cookie, slave) == 0) {
|
|
if (--timo == 0) {
|
|
aprint_error_dev(&sc->sc_dev, "swait timeout\n");
|
|
return(-1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Resource accounting: check if the address has already been
|
|
* claimed and allocated.
|
|
*/
|
|
int
|
|
gpib_isalloc(struct gpib_softc *sc, u_int8_t address)
|
|
{
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpib_isalloc: sc=%p address=%d\n", sc, address));
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (address >= GPIB_NDEVS)
|
|
panic("gpib_isalloc: device address out of range");
|
|
#endif
|
|
|
|
return ((sc->sc_rmap & (1 << address)) != 0);
|
|
}
|
|
|
|
/*
|
|
* Resource accounting: allocate the address.
|
|
*/
|
|
int
|
|
gpib_alloc(struct gpib_softc *sc, u_int8_t address)
|
|
{
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpib_alloc: sc=%p address=%d\n", sc, address));
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (address >= GPIB_NDEVS)
|
|
panic("gpib_alloc: device address out of range");
|
|
#endif
|
|
|
|
if (!gpib_isalloc(sc, address)) {
|
|
sc->sc_rmap |= (1 << address);
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Resource accounting: deallocate the address.
|
|
*/
|
|
void
|
|
gpib_dealloc(struct gpib_softc *sc, u_int8_t address)
|
|
{
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpib_free: sc=%p address=%d\n", sc, address));
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (address >= GPIB_NDEVS)
|
|
panic("gpib_free: device address out of range");
|
|
|
|
if (!gpib_isalloc(sc, address))
|
|
panic("gpib_free: not allocated");
|
|
#endif
|
|
|
|
sc->sc_rmap &= ~(1 << address);
|
|
}
|
|
|
|
int
|
|
_gpibsend(struct gpib_softc *sc, int slave, int sec, void *ptr, int origcnt)
|
|
{
|
|
int rv;
|
|
int cnt = 0;
|
|
u_int8_t cmds[4];
|
|
int i = 0;
|
|
|
|
DPRINTF(DBG_FOLLOW,
|
|
("_gpibsend: sc=%p slave %d sec=%d ptr=%p cnt=%d\n",
|
|
sc, slave, sec, ptr, origcnt));
|
|
|
|
/*
|
|
* For compatibility, call the hardware driver directly.
|
|
*/
|
|
if (sc->sc_ic->send != NULL) {
|
|
rv = (*sc->sc_ic->send)(sc->sc_ic->cookie,
|
|
slave, sec, ptr, origcnt);
|
|
return (rv);
|
|
}
|
|
|
|
if ((*sc->sc_ic->tc)(sc->sc_ic->cookie, 0))
|
|
goto senderror;
|
|
cmds[i++] = GPIBCMD_UNL;
|
|
cmds[i++] = GPIBCMD_TAG | sc->sc_myaddr;
|
|
cmds[i++] = GPIBCMD_LAG | slave;
|
|
if (sec >= 0 || sec == -2) {
|
|
if (sec == -2) /* selected device clear KLUDGE */
|
|
cmds[i++] = GPIBCMD_SDC;
|
|
else
|
|
cmds[i++] = GPIBCMD_SCG | sec;
|
|
}
|
|
if ((*sc->sc_ic->sendcmds)(sc->sc_ic->cookie, cmds, i) != i)
|
|
goto senderror;
|
|
if ((*sc->sc_ic->gts)(sc->sc_ic->cookie))
|
|
goto senderror;
|
|
if (origcnt) {
|
|
cnt = (*sc->sc_ic->senddata)(sc->sc_ic->cookie, ptr, origcnt);
|
|
if (cnt != origcnt)
|
|
goto senderror;
|
|
if ((*sc->sc_ic->tc)(sc->sc_ic->cookie, 0))
|
|
goto senderror;
|
|
}
|
|
return (origcnt);
|
|
|
|
senderror:
|
|
(*sc->sc_ic->ifc)(sc->sc_ic->cookie);
|
|
DPRINTF(DBG_FAIL,
|
|
("%s: _gpibsend failed: slave %d, sec %x, sent %d of %d bytes\n",
|
|
device_xname(&sc->sc_dev), slave, sec, cnt, origcnt));
|
|
return (cnt);
|
|
}
|
|
|
|
int
|
|
_gpibrecv(struct gpib_softc *sc, int slave, int sec, void *ptr, int origcnt)
|
|
{
|
|
int rv;
|
|
u_int8_t cmds[4];
|
|
int cnt = 0;
|
|
int i = 0;
|
|
|
|
DPRINTF(DBG_FOLLOW,
|
|
("_gpibrecv: sc=%p slave=%d sec=%d buf=%p cnt=%d\n",
|
|
sc, slave, sec, ptr, origcnt));
|
|
|
|
/*
|
|
* For compatibility, call the hardware driver directly.
|
|
*/
|
|
if (sc->sc_ic->recv != NULL) {
|
|
rv = (*sc->sc_ic->recv)(sc->sc_ic->cookie,
|
|
slave, sec, ptr, origcnt);
|
|
return (rv);
|
|
}
|
|
|
|
/*
|
|
* slave < 0 implies continuation of a previous receive
|
|
* that probably timed out.
|
|
*/
|
|
if (slave >= 0) {
|
|
if ((*sc->sc_ic->tc)(sc->sc_ic->cookie, 0))
|
|
goto recverror;
|
|
cmds[i++] = GPIBCMD_UNL;
|
|
cmds[i++] = GPIBCMD_LAG | sc->sc_myaddr;
|
|
cmds[i++] = GPIBCMD_TAG | slave;
|
|
if (sec >= 0)
|
|
cmds[i++] = GPIBCMD_SCG | sec;
|
|
if ((*sc->sc_ic->sendcmds)(sc->sc_ic->cookie, cmds, i) != i)
|
|
goto recverror;
|
|
if ((*sc->sc_ic->gts)(sc->sc_ic->cookie))
|
|
goto recverror;
|
|
}
|
|
if (origcnt) {
|
|
cnt = (*sc->sc_ic->recvdata)(sc->sc_ic->cookie, ptr, origcnt);
|
|
if (cnt != origcnt)
|
|
goto recverror;
|
|
if ((sc->sc_ic->tc)(sc->sc_ic->cookie, 0))
|
|
goto recverror;
|
|
cmds[0] = (slave == GPIB_BROADCAST_ADDR) ?
|
|
GPIBCMD_UNA : GPIBCMD_UNT;
|
|
if ((*sc->sc_ic->sendcmds)(sc->sc_ic->cookie, cmds, 1) != 1)
|
|
goto recverror;
|
|
}
|
|
return (origcnt);
|
|
|
|
recverror:
|
|
(*sc->sc_ic->ifc)(sc->sc_ic->cookie);
|
|
DPRINTF(DBG_FAIL,
|
|
("_gpibrecv: failed, sc=%p slave %d, sec %x, got %d of %d bytes\n",
|
|
sc, slave, sec, cnt, origcnt));
|
|
return (cnt);
|
|
}
|
|
|
|
/*
|
|
* /dev/gpib? interface
|
|
*/
|
|
|
|
int
|
|
gpibopen(dev_t dev, int flags, int mode, struct lwp *l)
|
|
{
|
|
struct gpib_softc *sc;
|
|
|
|
sc = device_lookup_private(&gpib_cd, GPIBUNIT(dev));
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpibopen: sc=%p\n", sc));
|
|
|
|
if (sc->sc_flags & GPIBF_ACTIVE)
|
|
return (EBUSY);
|
|
sc->sc_flags |= GPIBF_ACTIVE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
gpibclose(dev_t dev, int flag, int mode, struct lwp *l)
|
|
{
|
|
struct gpib_softc *sc;
|
|
|
|
sc = device_lookup_private(&gpib_cd, GPIBUNIT(dev));
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpibclose: sc=%p\n", sc));
|
|
|
|
sc->sc_flags &= ~GPIBF_ACTIVE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
gpibread(dev_t dev, struct uio *uio, int flags)
|
|
{
|
|
struct gpib_softc *sc;
|
|
|
|
sc = device_lookup_private(&gpib_cd, GPIBUNIT(dev));
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpibread: sc=%p\n", sc));
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
int
|
|
gpibwrite(dev_t dev, struct uio *uio, int flags)
|
|
{
|
|
struct gpib_softc *sc;
|
|
|
|
sc = device_lookup_private(&gpib_cd, GPIBUNIT(dev));
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpibwrite: sc=%p\n", sc));
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
int
|
|
gpibioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
|
|
{
|
|
struct gpib_softc *sc;
|
|
|
|
sc = device_lookup_private(&gpib_cd, GPIBUNIT(dev));
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpibioctl(%lu, '%c',%lu): sc=%p\n",
|
|
IOCPARM_LEN(cmd), (char)IOCGROUP(cmd), cmd & 0xff, sc));
|
|
|
|
switch (cmd) {
|
|
case GPIB_INFO:
|
|
(*(int *)data) = 0xa5a5a5a5;
|
|
break;
|
|
}
|
|
|
|
return (EINVAL);
|
|
}
|
|
|
|
int
|
|
gpibpoll(dev_t dev, int events, struct lwp *l)
|
|
{
|
|
struct gpib_softc *sc;
|
|
|
|
sc = device_lookup_private(&gpib_cd, GPIBUNIT(dev));
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
DPRINTF(DBG_FOLLOW, ("gpibpoll: sc=%p\n", sc));
|
|
|
|
return (0);
|
|
}
|