1 /* $NetBSD: acafh.c,v 1.5 2021/08/07 16:18:41 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 1.5 2021/08/07 16:18:41 thorpej Exp $");
34
35 /*
36 * Individual Computers ACA500 driver.
37 */
38
39 #include <sys/param.h>
40 #include <sys/device.h>
41 #include <sys/malloc.h>
42 #include <sys/socket.h>
43 #include <sys/systm.h>
44 #include <sys/bus.h>
45 #include <sys/types.h>
46
47 #include <uvm/uvm.h>
48
49 #include <machine/cpu.h>
50
51 #include <amiga/amiga/device.h>
52 #include <amiga/amiga/isr.h>
53
54 #include <amiga/dev/zbusvar.h>
55 #include <amiga/dev/acafhvar.h>
56 #include <amiga/dev/acafhreg.h>
57
58 int acafh_match(device_t, cfdata_t , void *);
59 void acafh_attach(device_t, device_t, void *);
60 static int acafh_print(void *, const char *);
61 static uint8_t acafh_reg_read(struct acafh_softc *, uint8_t);
62 static uint8_t acafh_revision(struct acafh_softc *);
63
64 CFATTACH_DECL_NEW(acafh, sizeof(struct acafh_softc),
65 acafh_match, acafh_attach, NULL, NULL);
66
67 /*
68 * Since ACA500 is not an AutoConfig board and current amiga port infrastructure
69 * does not have typical obio attachment, we need to hack in the probe procedure
70 * into mbattach(). This is supposed to be a temporary solution.
71 */
72 bool
acafh_mbattach_probe(void)73 acafh_mbattach_probe(void)
74 {
75 vaddr_t aca_rom_vbase;
76 struct bus_space_tag aca_rom_bst;
77 bus_space_tag_t aca_rom_t;
78 bus_space_handle_t aca_rom_h;
79 uint32_t aca_id;
80 bool rv;
81
82 rv = false;
83
84 #ifdef ACAFH_DEBUG
85 aprint_normal("acafh: probing for ACA500\n");
86 #endif /* ACAFH_DEBUG */
87
88 /*
89 * Allocate VA to hold one mapped page, which we will use
90 * to access the beginning of ACA500 flash.
91 */
92 aca_rom_vbase = uvm_km_alloc(kernel_map,
93 PAGE_SIZE, 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
94
95 /* Create the physical to virtual mapping. */
96 pmap_enter(vm_map_pmap(kernel_map), aca_rom_vbase, ACAFH_ROM_BASE,
97 VM_PROT_READ, PMAP_NOCACHE);
98 pmap_update(vm_map_pmap(kernel_map));
99
100 aca_rom_bst.base = (bus_addr_t) aca_rom_vbase;
101 aca_rom_bst.absm = &amiga_bus_stride_1;
102 aca_rom_t = &aca_rom_bst;
103 bus_space_map(aca_rom_t, 0, PAGE_SIZE, 0, &aca_rom_h);
104
105 /* Read out the ID. */
106 aca_id = bus_space_read_4(aca_rom_t, aca_rom_h, ACAFH_ROM_ID_OFFSET);
107 #ifdef ACAFH_DEBUG
108 aprint_normal("acafh: probe read %x from ACA ROM offset %x\n", aca_id,
109 ACAFH_ROM_ID_OFFSET);
110 #endif /* ACAFH_DEBUG */
111
112 if (aca_id == ACAFH_ROM_ID_VALUE)
113 rv = true;
114 else
115 rv = false;
116
117 #ifdef ACAFH_DEBUG
118 aprint_normal("acafh: clean up after probe\n");
119 #endif /* ACAFH_DEBUG */
120
121 pmap_remove(vm_map_pmap(kernel_map), aca_rom_vbase, aca_rom_vbase + PAGE_SIZE);
122 pmap_update(vm_map_pmap(kernel_map));
123
124 uvm_km_free(kernel_map, aca_rom_vbase, PAGE_SIZE,
125 UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
126
127 return rv;
128 }
129
130 int
acafh_match(device_t parent,cfdata_t cf,void * aux)131 acafh_match(device_t parent, cfdata_t cf, void *aux)
132 {
133 if (matchname(aux, "acafh") == 0)
134 return(0);
135 return(1);
136 }
137
138 void
acafh_attach(device_t parent,device_t self,void * aux)139 acafh_attach(device_t parent, device_t self, void *aux)
140 {
141 struct acafh_softc *sc;
142 vaddr_t aca_vbase;
143 int i;
144 struct acafhbus_attach_args aaa_wdc;
145 struct acafhbus_attach_args aaa_cp;
146
147 sc = device_private(self);
148 sc->sc_dev = self;
149
150 /*
151 * Allocate enough kernel memory.
152 * XXX: we should be sure to prepare enough kva during early init...
153 */
154 aca_vbase = uvm_km_alloc(kernel_map,
155 ACAFH_END - ACAFH_BASE, 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
156
157 if (aca_vbase == 0) {
158 aprint_error_dev(sc->sc_dev,
159 "failed allocating virtual memory\n");
160 return;
161 }
162
163 /*
164 * Map the ACA500 registers into kernel virutal space.
165 */
166 for (i = ACAFH_BASE; i < ACAFH_END; i += PAGE_SIZE)
167 pmap_enter(vm_map_pmap(kernel_map),
168 i - ACAFH_BASE + aca_vbase, i,
169 VM_PROT_READ | VM_PROT_WRITE, true);
170 pmap_update(vm_map_pmap(kernel_map));
171
172 aca_vbase += ACAFH_FIRST_REG_OFF;
173
174 sc->sc_aca_bst.base = (bus_addr_t) aca_vbase;
175 sc->sc_aca_bst.absm = &amiga_bus_stride_1;
176 /* sc->sc_aca_bst.absm = &amiga_bus_stride_0x4000; */
177 sc->sc_aca_iot = &sc->sc_aca_bst;
178
179 bus_space_map(sc->sc_aca_iot, 0, 0xF, 0, &sc->sc_aca_ioh);
180
181 #ifdef ACAFH_DEBUG
182 aprint_normal_dev(sc->sc_dev,
183 "ACA500 registers mapped to pa %x (va %x)\n",
184 kvtop((void*)sc->sc_aca_ioh), sc->sc_aca_bst.base);
185 aprint_normal_dev(sc->sc_dev, "AUX intr enable %x\n",
186 acafh_reg_read(sc, ACAFH_MEMPROBE_AUXIRQ));
187 #endif /* ACAFH_DEBUG */
188
189 aprint_normal(": Individual Computers ACA500 (rev %x)\n",
190 acafh_revision(sc));
191
192 aprint_normal_dev(sc->sc_dev, "CF cards present: ");
193 if (acafh_reg_read(sc, ACAFH_CF_DETECT_BOOT)) {
194 aprint_normal("BOOT ");
195 }
196 if (acafh_reg_read(sc, ACAFH_CF_DETECT_AUX)) {
197 aprint_normal("AUX ");
198 }
199 aprint_normal("\n");
200
201 aaa_wdc.aaa_pbase = (bus_addr_t) GAYLE_IDE_BASE + 2;
202 strcpy(aaa_wdc.aaa_name, "wdc_acafh");
203 config_found(sc->sc_dev, &aaa_wdc, acafh_print, CFARGS_NONE);
204
205 aaa_cp.aaa_pbase = (bus_addr_t) ACAFH_CLOCKPORT_BASE;
206 strcpy(aaa_cp.aaa_name, "gencp_acafh");
207 config_found(sc->sc_dev, &aaa_cp, acafh_print, CFARGS_NONE);
208 }
209
210 uint8_t
acafh_cf_intr_status(struct acafh_softc * sc,uint8_t slot)211 acafh_cf_intr_status(struct acafh_softc *sc, uint8_t slot)
212 {
213 uint8_t status;
214
215 if (slot == 0) {
216 status = acafh_reg_read(sc, ACAFH_CF_IRQ_BOOT);
217 } else {
218 status = acafh_reg_read(sc, ACAFH_CF_IRQ_AUX);
219 }
220
221 return status;
222 }
223
224 static uint8_t
acafh_revision(struct acafh_softc * sc)225 acafh_revision(struct acafh_softc *sc)
226 {
227 uint8_t revbit0, revbit1, revbit2, revbit3;
228
229 revbit3 = acafh_reg_read(sc, ACAFH_VERSION_BIT3);
230 revbit2 = acafh_reg_read(sc, ACAFH_VERSION_BIT2);
231 revbit1 = acafh_reg_read(sc, ACAFH_VERSION_BIT1);
232 revbit0 = acafh_reg_read(sc, ACAFH_VERSION_BIT0);
233
234 return revbit0 | (revbit1 << 1) | (revbit2 << 2) | (revbit3 << 3);
235 }
236
237 static uint8_t
acafh_reg_read(struct acafh_softc * sc,uint8_t reg)238 acafh_reg_read(struct acafh_softc *sc, uint8_t reg)
239 {
240 uint16_t val;
241
242 val = bus_space_read_2(sc->sc_aca_iot, sc->sc_aca_ioh, reg * 0x4000);
243 #ifdef ACAFH_DEBUG
244 aprint_normal_dev(sc->sc_dev, "read out reg %x from %lx (%x), val %x\n",
245 reg, sc->sc_aca_ioh + reg, (bus_addr_t) kvtop((void*)
246 ((unsigned) sc->sc_aca_ioh + reg * 0x4000)), val);
247 #endif /* ACAFH_DEBUG */
248
249 return (val & ACAFH_MSB_MASK) >> ACAFH_MSB_SHIFT;
250 }
251
252 static int
acafh_print(void * aux,const char * w)253 acafh_print(void *aux, const char *w)
254 {
255 if (w == NULL)
256 return 0;
257
258 return 0;
259 }
260
261