hil_gpib.c revision 1.12 
1/*	$NetBSD: hil_gpib.c,v 1.12 2012/10/27 17:18:16 chs Exp $	*/
2
3#include <sys/cdefs.h>
4__KERNEL_RCSID(0, "$NetBSD: hil_gpib.c,v 1.12 2012/10/27 17:18:16 chs Exp $");
5
6#include <sys/param.h>
7#include <sys/systm.h>
8#include <sys/callout.h>
9#include <sys/conf.h>
10#include <sys/device.h>
11
12#include <dev/gpib/gpibvar.h>
13
14#ifdef DEBUG
15int     hildebug = 0;
16#define HDB_FOLLOW      0x01
17#define HDB_MMAP	0x02
18#define HDB_MASK	0x04
19#define HDB_CONFIG      0x08
20#define HDB_KEYBOARD    0x10
21#define HDB_IDMODULE    0x20
22#define HDB_EVENTS      0x80
23#define DPRINTF(mask, str)	if (hildebug & (mask)) printf str
24#else
25#define DPRINTF(mask, str)	/* nothing */
26#endif
27
28struct  hil_softc {
29	gpib_chipset_tag_t sc_ic;
30	gpib_handle_t sc_hdl;
31
32	int	sc_address;		 /* GPIB address */
33	int     sc_flags;
34#define HILF_ALIVE	0x01
35#define HILF_OPEN	0x02
36#define HILF_UIO	0x04
37#define HILF_TIMO	0x08
38#define HILF_DELAY	0x10
39};
40
41int     hilmatch(device_t, cfdata_t, void *);
42void    hilattach(device_t, device_t, void *);
43
44const struct cfattach hil_ca = {
45	sizeof(struct hil_softc), hilmatch, hilattach,
46};
47
48void	hilcallback(void *, int);
49void	hilstart(void *);
50
51int
52hilmatch(device_t parent, cfdata_t match, void *aux)
53{
54	struct gpib_attach_args *ga = aux;
55	u_int8_t *cmd = "SE;";
56	u_int8_t stat;
57
58	if (gpibsend(ga->ga_ic, ga->ga_address, -1, cmd, 3) != 3)
59		return (0);
60	if (gpibrecv(ga->ga_ic, ga->ga_address, -1, &stat, 1) != 1)
61		return (0);
62	printf("hilmatch: enable status byte 0x%x\n", stat);
63	return (1);
64}
65
66void
67hilattach(device_t parent, device_t self, void *aux)
68{
69	struct hil_softc *sc = device_private(self);
70	struct gpib_attach_args *ga = aux;
71
72	printf("\n");
73
74	sc->sc_ic = ga->ga_ic;
75	sc->sc_address = ga->ga_address;
76
77	if (gpibregister(sc->sc_ic, sc->sc_address, hilcallback, sc,
78	    &sc->sc_hdl)) {
79		aprint_error_dev(self, "can't register callback\n");
80		return;
81	}
82
83	sc->sc_flags = HILF_ALIVE;
84}
85
86void
87hilcallback(void *v, int action)
88{
89	struct hil_softc *sc = v;
90
91	DPRINTF(HDB_FOLLOW, ("hilcallback: v=%p, action=%d\n", v, action));
92
93	switch (action) {
94	case GPIBCBF_START:
95		hilstart(sc);
96	case GPIBCBF_INTR:
97		/* no-op */
98		break;
99#ifdef DEBUG
100	default:
101		DPRINTF(HDB_FOLLOW, ("hilcallback: unknown action %d\n",
102		    action));
103		break;
104#endif
105	}
106}
107
108void
109hilstart(void *v)
110{
111	struct hil_softc *sc = v;
112
113	DPRINTF(HDB_FOLLOW, ("hilstart\n"));
114
115	sc->sc_flags &= ~HILF_DELAY;
116}
117