1 /* $OpenBSD: fhc.c,v 1.22 2024/03/29 21:29:33 miod Exp $ */
2
3 /*
4 * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/kernel.h>
32 #include <sys/device.h>
33 #include <sys/conf.h>
34 #include <sys/timeout.h>
35 #include <sys/malloc.h>
36
37 #include <machine/bus.h>
38 #include <machine/autoconf.h>
39 #include <machine/openfirm.h>
40
41 #include <sparc64/dev/fhcreg.h>
42 #include <sparc64/dev/fhcvar.h>
43 #include <sparc64/dev/iommureg.h>
44
45 struct cfdriver fhc_cd = {
46 NULL, "fhc", DV_DULL
47 };
48
49 int fhc_print(void *, const char *);
50
51 bus_space_tag_t fhc_alloc_bus_tag(struct fhc_softc *);
52 int _fhc_bus_map(bus_space_tag_t, bus_space_tag_t, bus_addr_t, bus_size_t,
53 int, bus_space_handle_t *);
54 void *fhc_intr_establish(bus_space_tag_t, bus_space_tag_t, int, int, int,
55 int (*)(void *), void *, const char *);
56 bus_space_handle_t *fhc_find_intr_handle(struct fhc_softc *, int);
57 void fhc_led_blink(void *, int);
58
59 void
fhc_attach(struct fhc_softc * sc)60 fhc_attach(struct fhc_softc *sc)
61 {
62 int node0, node;
63 u_int32_t ctrl;
64
65 printf(" board %d: %s\n", sc->sc_board,
66 getpropstring(sc->sc_node, "board-model"));
67
68 sc->sc_cbt = fhc_alloc_bus_tag(sc);
69
70 sc->sc_ign = sc->sc_board << 1;
71 bus_space_write_4(sc->sc_bt, sc->sc_ireg, FHC_I_IGN, sc->sc_ign);
72 sc->sc_ign = bus_space_read_4(sc->sc_bt, sc->sc_ireg, FHC_I_IGN);
73
74 ctrl = bus_space_read_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL);
75 if (!sc->sc_is_central)
76 ctrl |= FHC_P_CTRL_IXIST;
77 ctrl &= ~(FHC_P_CTRL_AOFF | FHC_P_CTRL_BOFF | FHC_P_CTRL_SLINE);
78 bus_space_write_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL, ctrl);
79 bus_space_read_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL);
80
81 /* clear interrupts */
82 bus_space_write_4(sc->sc_bt, sc->sc_freg, FHC_F_ICLR, 0);
83 bus_space_read_4(sc->sc_bt, sc->sc_freg, FHC_F_ICLR);
84 bus_space_write_4(sc->sc_bt, sc->sc_sreg, FHC_S_ICLR, 0);
85 bus_space_read_4(sc->sc_bt, sc->sc_sreg, FHC_S_ICLR);
86 bus_space_write_4(sc->sc_bt, sc->sc_ureg, FHC_U_ICLR, 0);
87 bus_space_read_4(sc->sc_bt, sc->sc_ureg, FHC_U_ICLR);
88 bus_space_write_4(sc->sc_bt, sc->sc_treg, FHC_T_ICLR, 0);
89 bus_space_read_4(sc->sc_bt, sc->sc_treg, FHC_T_ICLR);
90
91 getprop(sc->sc_node, "ranges", sizeof(struct fhc_range),
92 &sc->sc_nrange, (void **)&sc->sc_range);
93
94 node0 = firstchild(sc->sc_node);
95 for (node = node0; node; node = nextsibling(node)) {
96 struct fhc_attach_args fa;
97
98 if (!checkstatus(node))
99 continue;
100
101 bzero(&fa, sizeof(fa));
102
103 fa.fa_node = node;
104 fa.fa_bustag = sc->sc_cbt;
105
106 if (fhc_get_string(fa.fa_node, "name", &fa.fa_name)) {
107 printf("can't fetch name for node 0x%x\n", node);
108 continue;
109 }
110 getprop(node, "reg", sizeof(struct fhc_reg),
111 &fa.fa_nreg, (void **)&fa.fa_reg);
112 getprop(node, "interrupts", sizeof(int),
113 &fa.fa_nintr, (void **)&fa.fa_intr);
114 getprop(node, "address", sizeof(*fa.fa_promvaddrs),
115 &fa.fa_npromvaddrs, (void **)&fa.fa_promvaddrs);
116
117 (void)config_found(&sc->sc_dv, (void *)&fa, fhc_print);
118
119 free(fa.fa_name, M_DEVBUF, 0);
120 free(fa.fa_reg, M_DEVBUF, 0);
121 free(fa.fa_intr, M_DEVBUF, 0);
122 free(fa.fa_promvaddrs, M_DEVBUF, 0);
123 }
124
125 sc->sc_blink.bl_func = fhc_led_blink;
126 sc->sc_blink.bl_arg = sc;
127 blink_led_register(&sc->sc_blink);
128 }
129
130 int
fhc_print(void * args,const char * busname)131 fhc_print(void *args, const char *busname)
132 {
133 struct fhc_attach_args *fa = args;
134 char *class;
135
136 if (busname != NULL) {
137 printf("\"%s\" at %s", fa->fa_name, busname);
138 class = getpropstring(fa->fa_node, "device_type");
139 if (*class != '\0')
140 printf(" class %s", class);
141 }
142 return (UNCONF);
143 }
144
145 int
fhc_get_string(int node,char * name,char ** buf)146 fhc_get_string(int node, char *name, char **buf)
147 {
148 int len;
149
150 len = getproplen(node, name);
151 if (len < 0)
152 return (len);
153 *buf = (char *)malloc(len + 1, M_DEVBUF, M_NOWAIT);
154 if (*buf == NULL)
155 return (-1);
156
157 if (len != 0)
158 getpropstringA(node, name, *buf);
159 (*buf)[len] = '\0';
160 return (0);
161 }
162
163 bus_space_tag_t
fhc_alloc_bus_tag(struct fhc_softc * sc)164 fhc_alloc_bus_tag(struct fhc_softc *sc)
165 {
166 struct sparc_bus_space_tag *bt;
167
168 bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT | M_ZERO);
169 if (bt == NULL)
170 panic("fhc: couldn't alloc bus tag");
171
172 strlcpy(bt->name, sc->sc_dv.dv_xname, sizeof(bt->name));
173 bt->cookie = sc;
174 bt->parent = sc->sc_bt;
175 bt->asi = bt->parent->asi;
176 bt->sasi = bt->parent->sasi;
177 bt->sparc_bus_map = _fhc_bus_map;
178 /* XXX bt->sparc_bus_mmap = fhc_bus_mmap; */
179 bt->sparc_intr_establish = fhc_intr_establish;
180 return (bt);
181 }
182
183 int
_fhc_bus_map(bus_space_tag_t t,bus_space_tag_t t0,bus_addr_t addr,bus_size_t size,int flags,bus_space_handle_t * hp)184 _fhc_bus_map(bus_space_tag_t t, bus_space_tag_t t0, bus_addr_t addr,
185 bus_size_t size, int flags, bus_space_handle_t *hp)
186 {
187 struct fhc_softc *sc = t->cookie;
188 int64_t slot = BUS_ADDR_IOSPACE(addr);
189 int64_t offset = BUS_ADDR_PADDR(addr);
190 int i;
191
192 if (t->parent == NULL || t->parent->sparc_bus_map == NULL) {
193 printf("\n_fhc_bus_map: invalid parent");
194 return (EINVAL);
195 }
196
197 if (flags & BUS_SPACE_MAP_PROMADDRESS)
198 return ((*t->parent->sparc_bus_map)(t, t0, addr,
199 size, flags, hp));
200
201 for (i = 0; i < sc->sc_nrange; i++) {
202 bus_addr_t paddr;
203
204 if (sc->sc_range[i].cspace != slot)
205 continue;
206
207 paddr = offset - sc->sc_range[i].coffset;
208 paddr += sc->sc_range[i].poffset;
209 paddr |= ((bus_addr_t)sc->sc_range[i].pspace << 32);
210
211 return ((*t->parent->sparc_bus_map)(t->parent, t0, paddr,
212 size, flags, hp));
213 }
214
215 return (EINVAL);
216 }
217
218 bus_space_handle_t *
fhc_find_intr_handle(struct fhc_softc * sc,int ino)219 fhc_find_intr_handle(struct fhc_softc *sc, int ino)
220 {
221 switch (FHC_INO(ino)) {
222 case FHC_F_INO:
223 return &sc->sc_freg;
224 case FHC_S_INO:
225 return &sc->sc_sreg;
226 case FHC_U_INO:
227 return &sc->sc_ureg;
228 case FHC_T_INO:
229 return &sc->sc_treg;
230 default:
231 break;
232 }
233
234 return (NULL);
235 }
236
237 void *
fhc_intr_establish(bus_space_tag_t t,bus_space_tag_t t0,int ihandle,int level,int flags,int (* handler)(void *),void * arg,const char * what)238 fhc_intr_establish(bus_space_tag_t t, bus_space_tag_t t0, int ihandle,
239 int level, int flags, int (*handler)(void *), void *arg, const char *what)
240 {
241 struct fhc_softc *sc = t->cookie;
242 volatile u_int64_t *intrmapptr = NULL, *intrclrptr = NULL;
243 struct intrhand *ih;
244 long vec;
245
246 if (level == IPL_NONE)
247 level = INTLEV(ihandle);
248 if (level == IPL_NONE) {
249 printf(": no IPL, setting IPL 2.\n");
250 level = 2;
251 }
252
253 if ((flags & BUS_INTR_ESTABLISH_SOFTINTR) == 0) {
254 bus_space_handle_t *hp;
255 struct fhc_intr_reg *intrregs;
256
257 hp = fhc_find_intr_handle(sc, ihandle);
258 if (hp == NULL) {
259 printf(": can't find intr handle\n");
260 return (NULL);
261 }
262
263 intrregs = bus_space_vaddr(sc->sc_bt, *hp);
264 intrmapptr = &intrregs->imap;
265 intrclrptr = &intrregs->iclr;
266 vec = ((sc->sc_ign << INTMAP_IGN_SHIFT) & INTMAP_IGN) |
267 INTINO(ihandle);
268 } else
269 vec = INTVEC(ihandle);
270
271 ih = bus_intr_allocate(t0, handler, arg, vec, level, intrmapptr,
272 intrclrptr, what);
273 if (ih == NULL)
274 return (NULL);
275
276 intr_establish(ih);
277
278 if (intrmapptr != NULL) {
279 u_int64_t r;
280
281 r = *intrmapptr;
282 r |= INTMAP_V;
283 *intrmapptr = r;
284 r = *intrmapptr;
285 ih->ih_number |= r & INTMAP_INR;
286 }
287
288 return (ih);
289 }
290
291 void
fhc_led_blink(void * vsc,int on)292 fhc_led_blink(void *vsc, int on)
293 {
294 struct fhc_softc *sc = vsc;
295 int s;
296 u_int32_t r;
297
298 s = splhigh();
299 r = bus_space_read_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL);
300 if (on)
301 r |= FHC_P_CTRL_RLED;
302 else
303 r &= ~FHC_P_CTRL_RLED;
304 r &= ~(FHC_P_CTRL_AOFF | FHC_P_CTRL_BOFF | FHC_P_CTRL_SLINE);
305 bus_space_write_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL, r);
306 bus_space_read_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL);
307 splx(s);
308 }
309