1 /* $NetBSD: sbbrz.c,v 1.9 2022/03/03 06:27:21 riastradh Exp $ */
2
3 /*
4 * Copyright 2000, 2001
5 * Broadcom Corporation. All rights reserved.
6 *
7 * This software is furnished under license and may be used and copied only
8 * in accordance with the following terms and conditions. Subject to these
9 * conditions, you may download, copy, install, use, modify and distribute
10 * modified or unmodified copies of this software in source and/or binary
11 * form. No title or ownership is transferred hereby.
12 *
13 * 1) Any source code used, modified or distributed must reproduce and
14 * retain this copyright notice and list of conditions as they appear in
15 * the source file.
16 *
17 * 2) No right is granted to use any trade name, trademark, or logo of
18 * Broadcom Corporation. Neither the "Broadcom Corporation" name nor any
19 * trademark or logo of Broadcom Corporation may be used to endorse or
20 * promote products derived from this software without the prior written
21 * permission of Broadcom Corporation.
22 *
23 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
26 * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
27 * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
28 * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
33 * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 /* from: $NetBSD: apecs.c,v 1.38 2000/06/29 08:58:45 mrg Exp */
37
38 /*-
39 * Copyright (c) 2000, 2010 The NetBSD Foundation, Inc.
40 * All rights reserved.
41 *
42 * This code is derived from software contributed to The NetBSD Foundation
43 * by Jason R. Thorpe.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
55 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
56 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
57 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
58 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
59 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
60 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
61 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
62 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
63 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
64 * POSSIBILITY OF SUCH DAMAGE.
65 */
66
67 /*
68 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
69 * All rights reserved.
70 *
71 * Author: Chris G. Demetriou
72 *
73 * Permission to use, copy, modify and distribute this software and
74 * its documentation is hereby granted, provided that both the copyright
75 * notice and this permission notice appear in all copies of the
76 * software, derivative works or modified versions, and any portions
77 * thereof, and that both notices appear in supporting documentation.
78 *
79 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
80 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
81 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
82 *
83 * Carnegie Mellon requests users of this software to return to
84 *
85 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
86 * School of Computer Science
87 * Carnegie Mellon University
88 * Pittsburgh PA 15213-3890
89 *
90 * any improvements or extensions that they make and grant Carnegie the
91 * rights to redistribute these changes.
92 */
93
94 /*
95 * Driver for SB-1250 I/O bridge 0, which provides the PCI and LDT
96 * interfaces.
97 */
98
99 #define _MIPS_BUS_DMA_PRIVATE
100
101 #include <sys/param.h>
102 #include <sys/device.h>
103 #include <sys/systm.h>
104 #include <sys/bus.h>
105
106 #include <dev/pci/pcireg.h>
107 #include <dev/pci/pcivar.h>
108 #include <dev/pci/pcidevs.h>
109
110 #include <mips/locore.h>
111 #include <mips/sibyte/include/sb1250_regs.h>
112 #include <mips/sibyte/include/sb1250_scd.h>
113 #include <mips/sibyte/include/zbbusvar.h>
114 #include <mips/sibyte/pci/sbbrzvar.h>
115
116 static int sbbrz_match(device_t, cfdata_t, void *);
117 static void sbbrz_attach(device_t, device_t, void *);
118
119 CFATTACH_DECL_NEW(sbbrz, 0, sbbrz_match, sbbrz_attach, NULL, NULL);
120
121 static int sbbrz_print(void *, const char *pnp);
122
123 /* There can be only one. */
124 struct sbbrz_softc sbbrz_softc;
125
126 static int
sbbrz_match(device_t parent,cfdata_t match,void * aux)127 sbbrz_match(device_t parent, cfdata_t match, void *aux)
128 {
129 struct zbbus_attach_args *zap = aux;
130
131 if (zap->za_locs.za_type != ZBBUS_ENTTYPE_BRZ)
132 return (0);
133
134 if (sbbrz_softc.sc_dev != NULL)
135 return (0);
136
137 return 1;
138 }
139
140 /*
141 * Set up the chipset's function pointers.
142 */
143 static void
sbbrz_init(struct sbbrz_softc * sc)144 sbbrz_init(struct sbbrz_softc *sc)
145 {
146 int error;
147
148 sbbrz_bus_io_init(&sc->sc_iot, sc);
149 sbbrz_bus_mem_init(&sc->sc_memt, sc);
150
151 bus_dma_tag_t t = &sc->sc_dmat64;
152 t->_cookie = sc;
153 t->_wbase = 0;
154 t->_bounce_alloc_lo = 0;
155 t->_bounce_alloc_hi = 0;
156 t->_dmamap_ops = mips_bus_dmamap_ops;
157 t->_dmamem_ops = mips_bus_dmamem_ops;
158 t->_dmatag_ops = mips_bus_dmatag_ops;
159
160 error = bus_dmatag_subregion(t, 0, __MASK(32), &sc->sc_dmat32, 0);
161 if (error)
162 panic("%s: failed to create 32bit dma tag: %d",
163 __func__, error);
164
165 sbbrz_pci_init(&sc->sc_pc, sc);
166 }
167
168 static void
sbbrz_attach(device_t parent,device_t self,void * aux)169 sbbrz_attach(device_t parent, device_t self, void *aux)
170 {
171 struct sbbrz_softc *sc = &sbbrz_softc;
172 struct pcibus_attach_args pba;
173 uint64_t regval;
174 bool host;
175
176 /* Tell the user whether it's host or device mode. */
177 regval = mips3_ld((register_t)MIPS_PHYS_TO_KSEG1(A_SCD_SYSTEM_CFG));
178 host = (regval & M_SYS_PCI_HOST) != 0;
179
180 aprint_normal(": %s pci mode\n", host ? "host" : "device");
181
182 /* note that we've attached the bridge; can't have two. */
183 sc->sc_dev = self;
184 device_set_private(self, sc);
185
186 /*
187 * set up the bridge's info; done once at console init time
188 * (maybe), but doesn't hurt to do twice.
189 */
190 sbbrz_init(sc);
191
192 #if _has_pba_busname
193 pba.pba_busname = "pci";
194 #endif
195 pba.pba_iot = &sc->sc_iot;
196 pba.pba_memt = &sc->sc_memt;
197 pba.pba_dmat64 = &sc->sc_dmat64;
198 pba.pba_dmat = sc->sc_dmat32;
199 pba.pba_pc = &sc->sc_pc;
200 pba.pba_bus = 0;
201 pba.pba_bridgetag = NULL;
202 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY |
203 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
204 config_found(self, &pba, sbbrz_print, CFARGS_NONE);
205 }
206
207 static int
sbbrz_print(void * aux,const char * pnp)208 sbbrz_print(void *aux, const char *pnp)
209 {
210 struct pcibus_attach_args *pba = aux;
211
212 /* only PCIs can attach to sbbrz; easy. */
213 if (pnp)
214 #if _has_pba_busname
215 aprint_normal("%s at %s\n", pba->pba_busname, pnp);
216 #else
217 aprint_normal("\n* sbbrz_pci at %s", pnp);
218 #endif
219 aprint_normal(" bus %d", pba->pba_bus);
220 return (UNCONF);
221 }
222