117 lines
2.3 KiB
C
117 lines
2.3 KiB
C
/* $NetBSD: hil_gpib.c,v 1.12 2012/10/27 17:18:16 chs Exp $ */
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: hil_gpib.c,v 1.12 2012/10/27 17:18:16 chs Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <dev/gpib/gpibvar.h>
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#ifdef DEBUG
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int hildebug = 0;
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#define HDB_FOLLOW 0x01
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#define HDB_MMAP 0x02
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#define HDB_MASK 0x04
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#define HDB_CONFIG 0x08
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#define HDB_KEYBOARD 0x10
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#define HDB_IDMODULE 0x20
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#define HDB_EVENTS 0x80
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#define DPRINTF(mask, str) if (hildebug & (mask)) printf str
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#else
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#define DPRINTF(mask, str) /* nothing */
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#endif
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struct hil_softc {
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gpib_chipset_tag_t sc_ic;
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gpib_handle_t sc_hdl;
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int sc_address; /* GPIB address */
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int sc_flags;
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#define HILF_ALIVE 0x01
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#define HILF_OPEN 0x02
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#define HILF_UIO 0x04
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#define HILF_TIMO 0x08
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#define HILF_DELAY 0x10
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};
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int hilmatch(device_t, cfdata_t, void *);
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void hilattach(device_t, device_t, void *);
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const struct cfattach hil_ca = {
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sizeof(struct hil_softc), hilmatch, hilattach,
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};
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void hilcallback(void *, int);
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void hilstart(void *);
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int
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hilmatch(device_t parent, cfdata_t match, void *aux)
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{
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struct gpib_attach_args *ga = aux;
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u_int8_t *cmd = "SE;";
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u_int8_t stat;
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if (gpibsend(ga->ga_ic, ga->ga_address, -1, cmd, 3) != 3)
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return (0);
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if (gpibrecv(ga->ga_ic, ga->ga_address, -1, &stat, 1) != 1)
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return (0);
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printf("hilmatch: enable status byte 0x%x\n", stat);
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return (1);
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}
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void
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hilattach(device_t parent, device_t self, void *aux)
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{
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struct hil_softc *sc = device_private(self);
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struct gpib_attach_args *ga = aux;
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printf("\n");
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sc->sc_ic = ga->ga_ic;
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sc->sc_address = ga->ga_address;
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if (gpibregister(sc->sc_ic, sc->sc_address, hilcallback, sc,
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&sc->sc_hdl)) {
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aprint_error_dev(self, "can't register callback\n");
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return;
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}
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sc->sc_flags = HILF_ALIVE;
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}
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void
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hilcallback(void *v, int action)
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{
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struct hil_softc *sc = v;
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DPRINTF(HDB_FOLLOW, ("hilcallback: v=%p, action=%d\n", v, action));
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switch (action) {
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case GPIBCBF_START:
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hilstart(sc);
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case GPIBCBF_INTR:
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/* no-op */
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break;
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#ifdef DEBUG
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default:
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DPRINTF(HDB_FOLLOW, ("hilcallback: unknown action %d\n",
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action));
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break;
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#endif
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}
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}
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void
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hilstart(void *v)
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{
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struct hil_softc *sc = v;
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DPRINTF(HDB_FOLLOW, ("hilstart\n"));
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sc->sc_flags &= ~HILF_DELAY;
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}
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