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