1 /* $NetBSD: mppb.c,v 1.13 2023/12/20 00:40:42 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Radoslaw Kujawa.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /* Matay Prometheus Zorro-PCI bridge driver. */
33
34 #include <sys/types.h>
35 #include <sys/param.h>
36 #include <sys/time.h>
37 #include <sys/systm.h>
38 #include <sys/errno.h>
39 #include <sys/device.h>
40 #include <sys/kmem.h>
41
42 #include <uvm/uvm_extern.h>
43
44 #include <machine/bus.h>
45 #include <machine/cpu.h>
46
47 #include <m68k/bus_dma.h>
48 #include <amiga/dev/zbusvar.h>
49 #include <amiga/pci/mppbreg.h>
50
51 #include <dev/pci/pcivar.h>
52 #include <dev/pci/pcireg.h>
53 #include <dev/pci/pcidevs.h>
54 #include <dev/pci/pciconf.h>
55
56 #include "opt_pci.h"
57
58 /* Zorro IDs */
59 #define ZORRO_MANID_MATAY 44359
60 #define ZORRO_PRODID_PROMETHEUS 1
61
62 struct mppb_softc {
63 device_t sc_dev;
64 volatile char *ba;
65 struct bus_space_tag pci_conf_area;
66 struct bus_space_tag pci_io_area;
67 struct bus_space_tag pci_mem_area;
68 struct amiga_pci_chipset apc;
69 };
70
71 static int mppb_match(device_t, cfdata_t, void *);
72 static void mppb_attach(device_t, device_t, void *);
73 pcireg_t mppb_pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
74 void mppb_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t);
75 int mppb_pci_bus_maxdevs(pci_chipset_tag_t, int);
76 void mppb_pci_attach_hook (device_t, device_t,
77 struct pcibus_attach_args *pba);
78 pcitag_t mppb_pci_make_tag(pci_chipset_tag_t, int, int, int);
79 void mppb_pci_decompose_tag(pci_chipset_tag_t, pcitag_t,
80 int *, int *, int *);
81 int mppb_pci_intr_map(const struct pci_attach_args *,
82 pci_intr_handle_t *);
83 const struct evcnt * mppb_pci_intr_evcnt(pci_chipset_tag_t,
84 pci_intr_handle_t);
85
86 CFATTACH_DECL_NEW(mppb, sizeof(struct mppb_softc),
87 mppb_match, mppb_attach, NULL, NULL);
88
89 static int
mppb_match(device_t parent,cfdata_t cf,void * aux)90 mppb_match(device_t parent, cfdata_t cf, void *aux)
91 {
92 struct zbus_args *zap;
93
94 zap = aux;
95
96 if (zap->manid != ZORRO_MANID_MATAY)
97 return 0;
98
99 if (zap->prodid != ZORRO_PRODID_PROMETHEUS)
100 return 0;
101
102 return 1;
103 }
104
105
106 static void
mppb_attach(device_t parent,device_t self,void * aux)107 mppb_attach(device_t parent, device_t self, void *aux)
108 {
109 struct mppb_softc *sc;
110 struct pcibus_attach_args pba;
111 struct zbus_args *zap;
112 pci_chipset_tag_t pc;
113
114 zap = aux;
115 sc = device_private(self);
116 pc = &sc->apc;
117 sc->sc_dev = self;
118 sc->ba = zap->va;
119
120 aprint_normal(": Matay Prometheus PCI bridge\n");
121
122 /* Setup bus space mappings. */
123 sc->pci_conf_area.base = (bus_addr_t) sc->ba + MPPB_CONF_BASE;
124 sc->pci_conf_area.absm = &amiga_bus_stride_1swap;
125
126 sc->pci_mem_area.base = (bus_addr_t) sc->ba + MPPB_MEM_BASE;
127 sc->pci_mem_area.absm = &amiga_bus_stride_1;
128
129 sc->pci_io_area.base = (bus_addr_t) sc->ba + MPPB_IO_BASE;
130 sc->pci_io_area.absm = &amiga_bus_stride_1;
131
132 #ifdef MPPB_DEBUG
133 aprint_normal("mppb mapped conf %x->%x, mem %x->%x\n, io %x->%x\n",
134 kvtop((void*) sc->pci_conf_area.base), sc->pci_conf_area.base,
135 kvtop((void*) sc->pci_mem_area.base), sc->pci_mem_area.base,
136 kvtop((void*) sc->pci_io_area.base), sc->pci_io_area.base);
137 #endif
138
139 sc->apc.pci_conf_datat = &(sc->pci_conf_area);
140
141 if (bus_space_map(sc->apc.pci_conf_datat, 0, MPPB_CONF_SIZE, 0,
142 &sc->apc.pci_conf_datah))
143 aprint_error_dev(self,
144 "couldn't map PCI configuration data space\n");
145
146 /* Initialize the PCI chipset tag. */
147 sc->apc.pc_conf_v = (void*) pc;
148 sc->apc.pc_bus_maxdevs = mppb_pci_bus_maxdevs;
149 sc->apc.pc_make_tag = amiga_pci_make_tag;
150 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag;
151 sc->apc.pc_conf_read = mppb_pci_conf_read;
152 sc->apc.pc_conf_write = mppb_pci_conf_write;
153 sc->apc.pc_attach_hook = mppb_pci_attach_hook;
154
155 sc->apc.pc_intr_map = mppb_pci_intr_map;
156 sc->apc.pc_intr_string = amiga_pci_intr_string;
157 sc->apc.pc_intr_establish = amiga_pci_intr_establish;
158 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish;
159
160 sc->apc.pc_conf_hook = amiga_pci_conf_hook;
161 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt;
162
163 #ifdef PCI_NETBSD_CONFIGURE
164 struct pciconf_resources *pcires = pciconf_resource_init();
165
166 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO,
167 MPPB_IO_BASE, MPPB_IO_SIZE);
168 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM,
169 MPPB_MEM_BASE, MPPB_MEM_SIZE);
170
171 #ifdef MPPB_DEBUG
172 aprint_normal("mppb: reconfiguring the bus!\n");
173 #endif /* MPPB_DEBUG */
174 pci_configure_bus(pc, pcires, 0, CACHELINE_SIZE);
175
176 pciconf_resource_fini(pcires);
177 #endif /* PCI_NETBSD_CONFIGURE */
178
179 pba.pba_iot = &(sc->pci_io_area);
180 pba.pba_memt = &(sc->pci_mem_area);
181 pba.pba_dmat = NULL;
182 pba.pba_dmat64 = NULL;
183 pba.pba_pc = pc;
184 pba.pba_flags = PCI_FLAGS_MEM_OKAY | PCI_FLAGS_IO_OKAY;
185 pba.pba_bus = 0;
186 pba.pba_bridgetag = NULL;
187
188 config_found(self, &pba, pcibusprint, CFARGS_NONE);
189 }
190
191 pcireg_t
mppb_pci_conf_read(pci_chipset_tag_t pc,pcitag_t tag,int reg)192 mppb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
193 {
194 uint32_t data;
195 uint32_t bus, dev, func;
196
197 if ((unsigned int)reg >= PCI_CONF_SIZE)
198 return (pcireg_t) -1;
199
200 pci_decompose_tag(pc, tag, &bus, &dev, &func);
201
202 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah,
203 (MPPB_CONF_STRIDE*dev) + reg);
204 #ifdef MPPB_DEBUG_CONF
205 aprint_normal("mppb conf read va: %lx, bus: %d, dev: %d, "
206 "func: %d, reg: %d -r-> data %x\n",
207 pc->pci_conf_datah, bus, dev, func, reg, data);
208 #endif /* MPPB_DEBUG_CONF */
209 return data;
210 }
211
212 void
mppb_pci_conf_write(pci_chipset_tag_t pc,pcitag_t tag,int reg,pcireg_t val)213 mppb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val)
214 {
215 uint32_t bus, dev, func;
216
217 if ((unsigned int)reg >= PCI_CONF_SIZE)
218 return;
219
220 pci_decompose_tag(pc, tag, &bus, &dev, &func);
221
222 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah,
223 (MPPB_CONF_STRIDE*dev) + reg, val);
224 #ifdef MPPB_DEBUG_CONF
225 aprint_normal("mppb conf write va: %lx, bus: %d, dev: %d, "
226 "func: %d, reg: %d -w-> data %x\n",
227 pc->pci_conf_datah, bus, dev, func, reg, val);
228 #endif /* MPPB_DEBUG_CONF */
229
230 }
231
232 int
mppb_pci_bus_maxdevs(pci_chipset_tag_t pc,int busno)233 mppb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
234 {
235 return 4; /* Prometheus has 4 slots */
236 }
237
238 void
mppb_pci_attach_hook(device_t parent,device_t self,struct pcibus_attach_args * pba)239 mppb_pci_attach_hook(device_t parent, device_t self,
240 struct pcibus_attach_args *pba)
241 {
242 }
243
244 int
mppb_pci_intr_map(const struct pci_attach_args * pa,pci_intr_handle_t * ihp)245 mppb_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
246 {
247 /* TODO: add sanity checking */
248
249 *ihp = MPPB_INT;
250 return 0;
251 }
252
253 const struct evcnt *
mppb_pci_intr_evcnt(pci_chipset_tag_t pc,pci_intr_handle_t ih)254 mppb_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih)
255 {
256 /* TODO: implement */
257 return NULL;
258 }
259