1 /* $NetBSD: acafh.c,v 1.7 2023/12/20 00:40:42 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2013 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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: acafh.c,v 1.7 2023/12/20 00:40:42 thorpej Exp $");
34
35 /*
36 * Individual Computers ACA500 driver.
37 */
38
39 #include <sys/param.h>
40 #include <sys/device.h>
41 #include <sys/socket.h>
42 #include <sys/systm.h>
43 #include <sys/bus.h>
44 #include <sys/types.h>
45
46 #include <uvm/uvm.h>
47
48 #include <machine/cpu.h>
49
50 #include <amiga/amiga/device.h>
51 #include <amiga/amiga/isr.h>
52
53 #include <amiga/dev/zbusvar.h>
54 #include <amiga/dev/acafhvar.h>
55 #include <amiga/dev/acafhreg.h>
56
57 int acafh_match(device_t, cfdata_t , void *);
58 void acafh_attach(device_t, device_t, void *);
59 static int acafh_print(void *, const char *);
60 static uint8_t acafh_reg_read(struct acafh_softc *, uint8_t);
61 static uint8_t acafh_revision(struct acafh_softc *);
62
63 CFATTACH_DECL_NEW(acafh, sizeof(struct acafh_softc),
64 acafh_match, acafh_attach, NULL, NULL);
65
66 /*
67 * Since ACA500 is not an AutoConfig board and current amiga port infrastructure
68 * does not have typical obio attachment, we need to hack in the probe procedure
69 * into mbattach(). This is supposed to be a temporary solution.
70 */
71 bool
acafh_mbattach_probe(void)72 acafh_mbattach_probe(void)
73 {
74 vaddr_t aca_rom_vbase;
75 struct bus_space_tag aca_rom_bst;
76 bus_space_tag_t aca_rom_t;
77 bus_space_handle_t aca_rom_h;
78 uint32_t aca_id;
79 bool rv;
80
81 rv = false;
82
83 #ifdef ACAFH_DEBUG
84 aprint_normal("acafh: probing for ACA500\n");
85 #endif /* ACAFH_DEBUG */
86
87 /*
88 * Allocate VA to hold one mapped page, which we will use
89 * to access the beginning of ACA500 flash.
90 */
91 aca_rom_vbase = uvm_km_alloc(kernel_map,
92 PAGE_SIZE, 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
93
94 /* Create the physical to virtual mapping. */
95 pmap_enter(vm_map_pmap(kernel_map), aca_rom_vbase, ACAFH_ROM_BASE,
96 VM_PROT_READ, PMAP_NOCACHE);
97 pmap_update(vm_map_pmap(kernel_map));
98
99 aca_rom_bst.base = (bus_addr_t) aca_rom_vbase;
100 aca_rom_bst.absm = &amiga_bus_stride_1;
101 aca_rom_t = &aca_rom_bst;
102 bus_space_map(aca_rom_t, 0, PAGE_SIZE, 0, &aca_rom_h);
103
104 /* Read out the ID. */
105 aca_id = bus_space_read_4(aca_rom_t, aca_rom_h, ACAFH_ROM_ID_OFFSET);
106 #ifdef ACAFH_DEBUG
107 aprint_normal("acafh: probe read %x from ACA ROM offset %x\n", aca_id,
108 ACAFH_ROM_ID_OFFSET);
109 #endif /* ACAFH_DEBUG */
110
111 if (aca_id == ACAFH_ROM_ID_VALUE)
112 rv = true;
113 else
114 rv = false;
115
116 #ifdef ACAFH_DEBUG
117 aprint_normal("acafh: clean up after probe\n");
118 #endif /* ACAFH_DEBUG */
119
120 pmap_remove(vm_map_pmap(kernel_map), aca_rom_vbase, aca_rom_vbase + PAGE_SIZE);
121 pmap_update(vm_map_pmap(kernel_map));
122
123 uvm_km_free(kernel_map, aca_rom_vbase, PAGE_SIZE,
124 UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
125
126 return rv;
127 }
128
129 int
acafh_match(device_t parent,cfdata_t cf,void * aux)130 acafh_match(device_t parent, cfdata_t cf, void *aux)
131 {
132 if (matchname(aux, "acafh") == 0)
133 return(0);
134 return(1);
135 }
136
137 void
acafh_attach(device_t parent,device_t self,void * aux)138 acafh_attach(device_t parent, device_t self, void *aux)
139 {
140 struct acafh_softc *sc;
141 vaddr_t aca_vbase;
142 int i;
143 struct acafhbus_attach_args aaa_wdc;
144 struct acafhbus_attach_args aaa_cp;
145
146 sc = device_private(self);
147 sc->sc_dev = self;
148
149 /*
150 * Allocate enough kernel memory.
151 * XXX: we should be sure to prepare enough kva during early init...
152 */
153 aca_vbase = uvm_km_alloc(kernel_map,
154 ACAFH_END - ACAFH_BASE, 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
155
156 if (aca_vbase == 0) {
157 aprint_error_dev(sc->sc_dev,
158 "failed allocating virtual memory\n");
159 return;
160 }
161
162 /*
163 * Map the ACA500 registers into kernel virutal space.
164 */
165 for (i = ACAFH_BASE; i < ACAFH_END; i += PAGE_SIZE)
166 pmap_enter(vm_map_pmap(kernel_map),
167 i - ACAFH_BASE + aca_vbase, i,
168 VM_PROT_READ | VM_PROT_WRITE, true);
169 pmap_update(vm_map_pmap(kernel_map));
170
171 aca_vbase += ACAFH_FIRST_REG_OFF;
172
173 sc->sc_aca_bst.base = (bus_addr_t) aca_vbase;
174 sc->sc_aca_bst.absm = &amiga_bus_stride_1;
175 /* sc->sc_aca_bst.absm = &amiga_bus_stride_0x4000; */
176 sc->sc_aca_iot = &sc->sc_aca_bst;
177
178 bus_space_map(sc->sc_aca_iot, 0, 0xF, 0, &sc->sc_aca_ioh);
179
180 #ifdef ACAFH_DEBUG
181 aprint_normal_dev(sc->sc_dev,
182 "ACA500 registers mapped to pa %x (va %x)\n",
183 kvtop((void*)sc->sc_aca_ioh), sc->sc_aca_bst.base);
184 aprint_normal_dev(sc->sc_dev, "AUX intr enable %x\n",
185 acafh_reg_read(sc, ACAFH_MEMPROBE_AUXIRQ));
186 #endif /* ACAFH_DEBUG */
187
188 aprint_normal(": Individual Computers ACA500 (rev %x)\n",
189 acafh_revision(sc));
190
191 aprint_normal_dev(sc->sc_dev, "CF cards present: ");
192 if (acafh_reg_read(sc, ACAFH_CF_DETECT_BOOT)) {
193 aprint_normal("BOOT ");
194 }
195 if (acafh_reg_read(sc, ACAFH_CF_DETECT_AUX)) {
196 aprint_normal("AUX ");
197 }
198 aprint_normal("\n");
199
200 aaa_wdc.aaa_pbase = (bus_addr_t) GAYLE_IDE_BASE + 2;
201 strcpy(aaa_wdc.aaa_name, "wdc_acafh");
202 config_found(sc->sc_dev, &aaa_wdc, acafh_print, CFARGS_NONE);
203
204 aaa_cp.aaa_pbase = (bus_addr_t) ACAFH_CLOCKPORT_BASE;
205 strcpy(aaa_cp.aaa_name, "gencp_acafh");
206 config_found(sc->sc_dev, &aaa_cp, acafh_print, CFARGS_NONE);
207 }
208
209 uint8_t
acafh_cf_intr_status(struct acafh_softc * sc,uint8_t slot)210 acafh_cf_intr_status(struct acafh_softc *sc, uint8_t slot)
211 {
212 uint8_t status;
213
214 if (slot == 0) {
215 status = acafh_reg_read(sc, ACAFH_CF_IRQ_BOOT);
216 } else {
217 status = acafh_reg_read(sc, ACAFH_CF_IRQ_AUX);
218 }
219
220 return status;
221 }
222
223 static uint8_t
acafh_revision(struct acafh_softc * sc)224 acafh_revision(struct acafh_softc *sc)
225 {
226 uint8_t revbit0, revbit1, revbit2, revbit3;
227
228 revbit3 = acafh_reg_read(sc, ACAFH_VERSION_BIT3);
229 revbit2 = acafh_reg_read(sc, ACAFH_VERSION_BIT2);
230 revbit1 = acafh_reg_read(sc, ACAFH_VERSION_BIT1);
231 revbit0 = acafh_reg_read(sc, ACAFH_VERSION_BIT0);
232
233 return revbit0 | (revbit1 << 1) | (revbit2 << 2) | (revbit3 << 3);
234 }
235
236 static uint8_t
acafh_reg_read(struct acafh_softc * sc,uint8_t reg)237 acafh_reg_read(struct acafh_softc *sc, uint8_t reg)
238 {
239 uint16_t val;
240
241 val = bus_space_read_2(sc->sc_aca_iot, sc->sc_aca_ioh, reg * 0x4000);
242 #ifdef ACAFH_DEBUG
243 aprint_normal_dev(sc->sc_dev, "read out reg %x from %lx (%x), val %x\n",
244 reg, sc->sc_aca_ioh + reg, (bus_addr_t) kvtop((void*)
245 ((unsigned) sc->sc_aca_ioh + reg * 0x4000)), val);
246 #endif /* ACAFH_DEBUG */
247
248 return (val & ACAFH_MSB_MASK) >> ACAFH_MSB_SHIFT;
249 }
250
251 static int
acafh_print(void * aux,const char * w)252 acafh_print(void *aux, const char *w)
253 {
254 if (w == NULL)
255 return 0;
256
257 return 0;
258 }
259
260