bha_isa.c revision 1.1 
1#include <sys/types.h>
2#include <sys/param.h>
3#include <sys/device.h>
4
5#include <machine/bus.h>
6#include <machine/intr.h>
7
8#include <scsi/scsi_all.h>
9#include <scsi/scsiconf.h>
10
11#include <dev/isa/isavar.h>
12#include <dev/isa/isadmavar.h>
13
14#include <dev/ic/bhareg.h>
15#include <dev/ic/bhavar.h>
16
17#define	BHA_ISA_IOSIZE	4
18
19int	bha_isa_probe __P((struct device *, void *, void *));
20void	bha_isa_attach __P((struct device *, struct device *, void *));
21
22struct cfattach bha_isa_ca = {
23	sizeof(struct bha_softc), bha_isa_probe, bha_isa_attach
24};
25
26/*
27 * Check the slots looking for a board we recognise
28 * If we find one, note it's address (slot) and call
29 * the actual probe routine to check it out.
30 */
31int
32bha_isa_probe(parent, match, aux)
33	struct device *parent;
34	void *match, *aux;
35{
36	struct isa_attach_args *ia = aux;
37	struct bha_softc sc;
38	bus_chipset_tag_t bc = ia->ia_bc;
39	bus_io_handle_t ioh;
40	isa_chipset_tag_t ic = ia->ia_ic;
41	int rv;
42
43	if (bus_io_map(bc, ia->ia_iobase, BHA_ISA_IOSIZE, &ioh))
44		return (0);
45
46	rv = bha_find(bc, ioh, &sc);
47
48	bus_io_unmap(bc, ioh, BHA_ISA_IOSIZE);
49
50	if (rv) {
51		if (ia->ia_irq != -1 && ia->ia_irq != sc.sc_irq)
52			return (0);
53		if (ia->ia_drq != -1 && ia->ia_drq != sc.sc_drq)
54			return (0);
55		ia->ia_irq = sc.sc_irq;
56		ia->ia_drq = sc.sc_drq;
57		ia->ia_msize = 0;
58		ia->ia_iosize = BHA_ISA_IOSIZE;
59	}
60	return (rv);
61}
62
63/*
64 * Attach all the sub-devices we can find
65 */
66void
67bha_isa_attach(parent, self, aux)
68	struct device *parent, *self;
69	void *aux;
70{
71	struct isa_attach_args *ia = aux;
72	struct bha_softc *sc = (void *)self;
73	bus_chipset_tag_t bc = ia->ia_bc;
74	bus_io_handle_t ioh;
75	isa_chipset_tag_t ic = ia->ia_ic;
76
77	printf("\n");
78
79	if (bus_io_map(bc, ia->ia_iobase, BHA_ISA_IOSIZE, &ioh))
80		panic("bha_attach: bus_io_map failed!");
81
82	sc->sc_bc = bc;
83	sc->sc_ioh = ioh;
84	if (!bha_find(bc, ioh, sc))
85		panic("bha_attach: bha_find failed!");
86
87	if (sc->sc_drq != -1)
88		isa_dmacascade(sc->sc_drq);
89
90	sc->sc_ih = isa_intr_establish(ic, sc->sc_irq, IST_EDGE, IPL_BIO,
91	    bha_intr, sc);
92	if (sc->sc_ih == NULL) {
93		printf("%s: couldn't establish interrupt\n",
94		    sc->sc_dev.dv_xname);
95		return;
96	}
97
98	bha_attach(sc);
99}
100