gapspci.c revision 1.3 1 /* $NetBSD: gapspci.c,v 1.3 2002/05/16 01:01:35 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Marcus Comstedt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Marcus Comstedt.
18 * 4. Neither the name of The NetBSD Foundation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/device.h>
41 #include <sys/malloc.h>
42 #include <sys/conf.h>
43 #include <sys/mbuf.h>
44
45 #include <machine/cpu.h>
46 #include <machine/bus.h>
47
48 #include <dev/pci/pcivar.h>
49 #include <dev/pci/pcireg.h>
50
51 #include <dev/pci/pcidevs.h>
52
53 #include <dreamcast/dev/g2/g2busvar.h>
54 #include <dreamcast/dev/g2/gapspcivar.h>
55
56 int gaps_match(struct device *, struct cfdata *, void *);
57 void gaps_attach(struct device *, struct device *, void *);
58
59 int gaps_print(void *, const char *);
60
61 struct cfattach gapspci_ca = {
62 sizeof(struct gaps_softc),
63 gaps_match,
64 gaps_attach,
65 };
66
67 int
68 gaps_match(struct device *parent, struct cfdata *match, void *aux)
69 {
70 struct g2bus_attach_args *ga = aux;
71 char idbuf[16];
72 bus_space_handle_t tmp_memh;
73
74 if(strcmp("gapspci", match->cf_driver->cd_name))
75 return 0;
76
77 if (bus_space_map(ga->ga_memt, 0x01001400, 0x100, 0, &tmp_memh) != 0)
78 return 0;
79
80 bus_space_read_region_1(ga->ga_memt, tmp_memh, 0,
81 idbuf, sizeof(idbuf));
82
83 bus_space_unmap(ga->ga_memt, tmp_memh, 0x100);
84
85 if(strncmp(idbuf, "GAPSPCI_BRIDGE_2", 16))
86 return 0;
87
88 return (1);
89 }
90
91 void
92 gaps_attach(struct device *parent, struct device *self, void *aux)
93 {
94 struct g2bus_attach_args *ga = aux;
95 struct gaps_softc *sc = (void *) self;
96 struct pcibus_attach_args pba;
97 int i;
98
99 printf(": SEGA GAPS PCI Bridge\n");
100
101 sc->sc_memt = ga->ga_memt;
102
103 sc->sc_dmabase = 0x1840000;
104 sc->sc_dmasize = 32768;
105
106 if (bus_space_map(sc->sc_memt, 0x01001400, 0x100,
107 0, &sc->sc_gaps_memh) != 0)
108 panic("gaps_attach: can't map GAPS register space");
109
110 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x18, 0x5a14a501);
111
112 for(i=0; i<1000000; i++)
113 ;
114
115 if(bus_space_read_4(sc->sc_memt, sc->sc_gaps_memh, 0x18) != 1)
116 panic("gaps_attach: GAPS PCI bridge not responding");
117
118 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x20, 0x1000000);
119 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x24, 0x1000000);
120 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x28, sc->sc_dmabase);
121 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x2c,
122 sc->sc_dmabase + sc->sc_dmasize);
123 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x14, 1);
124 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x34, 1);
125
126 gaps_pci_init(sc);
127 gaps_dma_init(sc);
128
129 memset(&pba, 0, sizeof(pba));
130
131 pba.pba_busname = "pci";
132 pba.pba_memt = sc->sc_memt;
133 pba.pba_dmat = &sc->sc_dmat;
134 pba.pba_bus = 0;
135 pba.pba_bridgetag = NULL;
136 pba.pba_flags = PCI_FLAGS_MEM_ENABLED;
137 pba.pba_pc = &sc->sc_pc;
138
139 (void) config_found(self, &pba, gaps_print);
140 }
141
142 int
143 gaps_print(void *aux, const char *pnp)
144 {
145 struct pcibus_attach_args *pba = aux;
146
147 if (pnp)
148 printf("%s at %s", pba->pba_busname, pnp);
149 printf(" bus %d", pba->pba_bus);
150
151 return (UNCONF);
152 }
153