xref: /netbsd/sys/dev/gpib/hil_gpib.c (revision 6550d01e)
1 /*	$NetBSD: hil_gpib.c,v 1.11 2009/05/12 14:21:58 cegger Exp $	*/
2 
3 #include <sys/cdefs.h>
4 __KERNEL_RCSID(0, "$NetBSD: hil_gpib.c,v 1.11 2009/05/12 14:21:58 cegger 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
15 int     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 
28 struct  hil_softc {
29 	struct device sc_dev;
30 	gpib_chipset_tag_t sc_ic;
31 	gpib_handle_t sc_hdl;
32 
33 	int	sc_address;		 /* GPIB address */
34 	int     sc_flags;
35 #define HILF_ALIVE	0x01
36 #define HILF_OPEN	0x02
37 #define HILF_UIO	0x04
38 #define HILF_TIMO	0x08
39 #define HILF_DELAY	0x10
40 };
41 
42 int     hilmatch(device_t, cfdata_t, void *);
43 void    hilattach(device_t, device_t, void *);
44 
45 const struct cfattach hil_ca = {
46 	sizeof(struct hil_softc), hilmatch, hilattach,
47 };
48 
49 void	hilcallback(void *, int);
50 void	hilstart(void *);
51 
52 int
53 hilmatch(device_t parent, cfdata_t match, void *aux)
54 {
55 	struct gpib_attach_args *ga = aux;
56 	u_int8_t *cmd = "SE;";
57 	u_int8_t stat;
58 
59 	if (gpibsend(ga->ga_ic, ga->ga_address, -1, cmd, 3) != 3)
60 		return (0);
61 	if (gpibrecv(ga->ga_ic, ga->ga_address, -1, &stat, 1) != 1)
62 		return (0);
63 	printf("hilmatch: enable status byte 0x%x\n", stat);
64 	return (1);
65 }
66 
67 void
68 hilattach(device_t parent, device_t self, void *aux)
69 {
70 	struct hil_softc *sc = device_private(self);
71 	struct gpib_attach_args *ga = aux;
72 
73 	printf("\n");
74 
75 	sc->sc_ic = ga->ga_ic;
76 	sc->sc_address = ga->ga_address;
77 
78 	if (gpibregister(sc->sc_ic, sc->sc_address, hilcallback, sc,
79 	    &sc->sc_hdl)) {
80 		aprint_error_dev(&sc->sc_dev, "can't register callback\n");
81 		return;
82 	}
83 
84 	sc->sc_flags = HILF_ALIVE;
85 }
86 
87 void
88 hilcallback(void *v, int action)
89 {
90 	struct hil_softc *sc = v;
91 
92 	DPRINTF(HDB_FOLLOW, ("hilcallback: v=%p, action=%d\n", v, action));
93 
94 	switch (action) {
95 	case GPIBCBF_START:
96 		hilstart(sc);
97 	case GPIBCBF_INTR:
98 		/* no-op */
99 		break;
100 #ifdef DEBUG
101 	default:
102 		DPRINTF(HDB_FOLLOW, ("hilcallback: unknown action %d\n",
103 		    action));
104 		break;
105 #endif
106 	}
107 }
108 
109 void
110 hilstart(void *v)
111 {
112 	struct hil_softc *sc = v;
113 
114 	DPRINTF(HDB_FOLLOW, ("hilstart(%x)\n", device_unit(&sc->sc_dev)));
115 
116 	sc->sc_flags &= ~HILF_DELAY;
117 }
118