1 /* $NetBSD: grackle.c,v 1.19 2022/01/21 19:12:28 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2000 Tsubai Masanari. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: grackle.c,v 1.19 2022/01/21 19:12:28 thorpej Exp $");
31
32 #include <sys/param.h>
33 #include <sys/device.h>
34 #include <sys/systm.h>
35
36 #include <dev/pci/pcivar.h>
37 #include <dev/ofw/openfirm.h>
38 #include <dev/ofw/ofw_pci.h>
39
40 #include <machine/autoconf.h>
41 #include <machine/pio.h>
42
43 struct grackle_softc {
44 device_t sc_dev;
45 struct genppc_pci_chipset sc_pc;
46 struct powerpc_bus_space sc_iot;
47 struct powerpc_bus_space sc_memt;
48 };
49
50 static void grackle_attach(device_t, device_t, void *);
51 static int grackle_match(device_t, cfdata_t, void *);
52
53 static pcireg_t grackle_conf_read(void *, pcitag_t, int);
54 static void grackle_conf_write(void *, pcitag_t, int, pcireg_t);
55
56 CFATTACH_DECL_NEW(grackle, sizeof(struct grackle_softc),
57 grackle_match, grackle_attach, NULL, NULL);
58
59 static int
grackle_match(device_t parent,cfdata_t cf,void * aux)60 grackle_match(device_t parent, cfdata_t cf, void *aux)
61 {
62 struct confargs *ca = aux;
63 char compat[32];
64
65 if (strcmp(ca->ca_name, "pci") != 0)
66 return 0;
67
68 memset(compat, 0, sizeof(compat));
69 OF_getprop(ca->ca_node, "compatible", compat, sizeof(compat));
70 if (strcmp(compat, "grackle") != 0)
71 return 0;
72
73 return 1;
74 }
75
76 #define GRACKLE_ADDR 0xfec00000
77 #define GRACKLE_DATA 0xfee00000
78
79 static void
grackle_attach(device_t parent,device_t self,void * aux)80 grackle_attach(device_t parent, device_t self, void *aux)
81 {
82 struct grackle_softc *sc = device_private(self);
83 pci_chipset_tag_t pc = &sc->sc_pc;
84 struct confargs *ca = aux;
85 struct pcibus_attach_args pba;
86 int len, node = ca->ca_node;
87 uint32_t busrange[2];
88 struct ranges {
89 uint32_t pci_hi, pci_mid, pci_lo;
90 uint32_t host;
91 uint32_t size_hi, size_lo;
92 } ranges[6], *rp = ranges;
93
94 aprint_normal("\n");
95 sc->sc_dev = self;
96
97 /* PCI bus number */
98 if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
99 return;
100
101 /* find i/o tag */
102 len = OF_getprop(node, "ranges", ranges, sizeof(ranges));
103 if (len == -1)
104 return;
105 while (len >= sizeof(ranges[0])) {
106 if ((rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) ==
107 OFW_PCI_PHYS_HI_SPACE_IO) {
108 sc->sc_iot.pbs_base = rp->host;
109 sc->sc_iot.pbs_limit = rp->host + rp->size_lo;
110 break;
111 }
112 len -= sizeof(ranges[0]);
113 rp++;
114 }
115
116 sc->sc_iot.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE;
117 sc->sc_iot.pbs_offset = 0;
118 if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_IO, node, &sc->sc_iot,
119 "grackle io") != 0)
120 panic("Can't init grackle io tag");
121
122 sc->sc_memt.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE;
123 sc->sc_memt.pbs_base = 0x00000000;
124 if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_MEM, node, &sc->sc_memt,
125 "grackle mem") != 0)
126 panic("Can't init grackle mem tag");
127
128 macppc_pci_get_chipset_tag(pc);
129 pc->pc_node = node;
130 pc->pc_addr = mapiodev(GRACKLE_ADDR, 4, false);
131 pc->pc_data = mapiodev(GRACKLE_DATA, 4, false);
132 pc->pc_bus = busrange[0];
133 pc->pc_conf_read = grackle_conf_read;
134 pc->pc_conf_write = grackle_conf_write;
135 pc->pc_memt = &sc->sc_memt;
136 pc->pc_iot = &sc->sc_iot;
137
138 memset(&pba, 0, sizeof(pba));
139 pba.pba_memt = pc->pc_memt;
140 pba.pba_iot = pc->pc_iot;
141 pba.pba_dmat = &pci_bus_dma_tag;
142 pba.pba_dmat64 = NULL;
143 pba.pba_bus = pc->pc_bus;
144 pba.pba_bridgetag = NULL;
145 pba.pba_pc = pc;
146 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY;
147
148 config_found(self, &pba, pcibusprint,
149 CFARGS(.devhandle = device_handle(self)));
150 }
151
152 static pcireg_t
grackle_conf_read(void * cookie,pcitag_t tag,int reg)153 grackle_conf_read(void *cookie, pcitag_t tag, int reg)
154 {
155 pci_chipset_tag_t pc = cookie;
156 pcireg_t data;
157 int s;
158
159 if ((unsigned int)reg >= PCI_CONF_SIZE)
160 return (pcireg_t) -1;
161
162 s = splhigh();
163
164 out32rb(pc->pc_addr, tag | reg);
165 data = 0xffffffff;
166 if (!badaddr(pc->pc_data, 4))
167 data = in32rb(pc->pc_data);
168 out32rb(pc->pc_addr, 0);
169
170 splx(s);
171
172 return data;
173 }
174
175 static void
grackle_conf_write(void * cookie,pcitag_t tag,int reg,pcireg_t data)176 grackle_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data)
177 {
178 pci_chipset_tag_t pc = cookie;
179 int s;
180
181 if ((unsigned int)reg >= PCI_CONF_SIZE)
182 return;
183
184 s = splhigh();
185
186 out32rb(pc->pc_addr, tag | reg);
187 out32rb(pc->pc_data, data);
188 out32rb(pc->pc_addr, 0);
189
190 splx(s);
191 }
192