1 /*-
2 * Copyright (c) 2006 Benno Rice. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/malloc.h>
34 #include <sys/rman.h>
35 #include <sys/timetc.h>
36 #include <machine/bus.h>
37 #include <machine/intr.h>
38
39 #include <vm/vm.h>
40 #include <vm/pmap.h>
41
42 #include <arm/xscale/pxa/pxavar.h>
43 #include <arm/xscale/pxa/pxareg.h>
44
45 static MALLOC_DEFINE(M_PXASMI, "PXA SMI",
46 "Data for static memory interface devices.");
47
48 struct pxa_smi_softc {
49 struct resource *ps_res[1];
50 struct rman ps_mem;
51 bus_space_tag_t ps_bst;
52 bus_addr_t ps_base;
53 };
54
55 struct smi_ivars {
56 struct resource_list smid_resources;
57 bus_addr_t smid_mem;
58 };
59
60 static struct resource_spec pxa_smi_spec[] = {
61 { SYS_RES_MEMORY, 0, RF_ACTIVE },
62 { -1, 0 }
63 };
64
65 static int pxa_smi_probe(device_t);
66 static int pxa_smi_attach(device_t);
67
68 static int pxa_smi_print_child(device_t, device_t);
69
70 static int pxa_smi_read_ivar(device_t, device_t, int, uintptr_t *);
71
72 static struct resource * pxa_smi_alloc_resource(device_t, device_t,
73 int, int *, u_long, u_long, u_long, u_int);
74 static int pxa_smi_release_resource(device_t, device_t,
75 int, int, struct resource *);
76 static int pxa_smi_activate_resource(device_t, device_t,
77 int, int, struct resource *);
78
79 static void pxa_smi_add_device(device_t, const char *, int);
80
81 static int
pxa_smi_probe(device_t dev)82 pxa_smi_probe(device_t dev)
83 {
84
85 if (resource_disabled("smi", device_get_unit(dev)))
86 return (ENXIO);
87
88 device_set_desc(dev, "Static Memory Interface");
89 return (0);
90 }
91
92 static int
pxa_smi_attach(device_t dev)93 pxa_smi_attach(device_t dev)
94 {
95 int error, i, dunit;
96 const char *dname;
97 struct pxa_smi_softc *sc;
98
99 sc = (struct pxa_smi_softc *)device_get_softc(dev);
100
101 error = bus_alloc_resources(dev, pxa_smi_spec, sc->ps_res);
102 if (error) {
103 device_printf(dev, "could not allocate resources\n");
104 return (ENXIO);
105 }
106
107 sc->ps_mem.rm_type = RMAN_ARRAY;
108 sc->ps_mem.rm_descr = device_get_nameunit(dev);
109 if (rman_init(&sc->ps_mem) != 0)
110 panic("pxa_smi_attach: failed to init mem rman");
111 if (rman_manage_region(&sc->ps_mem, 0, PXA2X0_CS_SIZE * 6) != 0)
112 panic("pxa_smi_attach: failed ot set up mem rman");
113
114 sc->ps_bst = base_tag;
115 sc->ps_base = rman_get_start(sc->ps_res[0]);
116
117 i = 0;
118 while (resource_find_match(&i, &dname, &dunit, "at",
119 device_get_nameunit(dev)) == 0) {
120 pxa_smi_add_device(dev, dname, dunit);
121 }
122
123 bus_generic_probe(dev);
124 bus_generic_attach(dev);
125
126 return (0);
127 }
128
129 static int
pxa_smi_print_child(device_t dev,device_t child)130 pxa_smi_print_child(device_t dev, device_t child)
131 {
132 struct smi_ivars *smid;
133 int retval;
134
135 smid = (struct smi_ivars *)device_get_ivars(child);
136 if (smid == NULL) {
137 device_printf(dev, "unknown device: %s\n",
138 device_get_nameunit(child));
139 return (0);
140 }
141
142 retval = 0;
143
144 retval += bus_print_child_header(dev, child);
145
146 retval += resource_list_print_type(&smid->smid_resources, "at mem",
147 SYS_RES_MEMORY, "%#lx");
148 retval += resource_list_print_type(&smid->smid_resources, "irq",
149 SYS_RES_IRQ, "%ld");
150
151 retval += bus_print_child_footer(dev, child);
152
153 return (retval);
154 }
155
156 static int
pxa_smi_read_ivar(device_t dev,device_t child,int which,uintptr_t * result)157 pxa_smi_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
158 {
159 struct pxa_smi_softc *sc;
160 struct smi_ivars *smid;
161
162 sc = device_get_softc(dev);
163 smid = device_get_ivars(child);
164
165 switch (which) {
166 case SMI_IVAR_PHYSBASE:
167 *((bus_addr_t *)result) = smid->smid_mem;
168 break;
169
170 default:
171 return (ENOENT);
172 }
173
174 return (0);
175 }
176
177 static struct resource *
pxa_smi_alloc_resource(device_t dev,device_t child,int type,int * rid,u_long start,u_long end,u_long count,u_int flags)178 pxa_smi_alloc_resource(device_t dev, device_t child, int type, int *rid,
179 u_long start, u_long end, u_long count, u_int flags)
180 {
181 struct pxa_smi_softc *sc;
182 struct smi_ivars *smid;
183 struct resource *rv;
184 struct resource_list *rl;
185 struct resource_list_entry *rle;
186 int needactivate;
187
188 sc = (struct pxa_smi_softc *)device_get_softc(dev);
189 smid = (struct smi_ivars *)device_get_ivars(child);
190 rl = &smid->smid_resources;
191
192 if (type == SYS_RES_IOPORT)
193 type = SYS_RES_MEMORY;
194
195 rle = resource_list_find(rl, type, *rid);
196 if (rle == NULL)
197 return (NULL);
198 if (rle->res != NULL)
199 panic("pxa_smi_alloc_resource: resource is busy");
200
201 needactivate = flags & RF_ACTIVE;
202 flags &= ~RF_ACTIVE;
203
204 switch (type) {
205 case SYS_RES_MEMORY:
206 rv = rman_reserve_resource(&sc->ps_mem, rle->start, rle->end,
207 rle->count, flags, child);
208 if (rv == NULL)
209 return (NULL);
210 rle->res = rv;
211 rman_set_rid(rv, *rid);
212 rman_set_bustag(rv, sc->ps_bst);
213 rman_set_bushandle(rv, rle->start);
214 if (needactivate) {
215 if (bus_activate_resource(child, type, *rid, rv) != 0) {
216 rman_release_resource(rv);
217 return (NULL);
218 }
219 }
220
221 break;
222
223 case SYS_RES_IRQ:
224 rv = bus_alloc_resource(dev, type, rid, rle->start, rle->end,
225 rle->count, flags);
226 if (rv == NULL)
227 return (NULL);
228 if (needactivate) {
229 if (bus_activate_resource(child, type, *rid, rv) != 0) {
230 bus_release_resource(dev, type, *rid, rv);
231 return (NULL);
232 }
233 }
234
235 break;
236
237 default:
238 return (NULL);
239 }
240
241 return (rv);
242 }
243
244 static int
pxa_smi_release_resource(device_t dev,device_t child,int type,int rid,struct resource * r)245 pxa_smi_release_resource(device_t dev, device_t child, int type, int rid,
246 struct resource *r)
247 {
248 struct smi_ivars *smid;
249 struct resource_list *rl;
250 struct resource_list_entry *rle;
251
252 if (type == SYS_RES_IRQ)
253 return (bus_release_resource(dev, SYS_RES_IRQ, rid, r));
254
255 smid = (struct smi_ivars *)device_get_ivars(child);
256 rl = &smid->smid_resources;
257
258 if (type == SYS_RES_IOPORT)
259 type = SYS_RES_MEMORY;
260
261 rle = resource_list_find(rl, type, rid);
262 if (rle == NULL)
263 panic("pxa_smi_release_resource: can't find resource");
264 if (rle->res == NULL)
265 panic("pxa_smi_release_resource: resource entry not busy");
266
267 rman_release_resource(rle->res);
268 rle->res = NULL;
269
270 return (0);
271 }
272
273 static int
pxa_smi_activate_resource(device_t dev,device_t child,int type,int rid,struct resource * r)274 pxa_smi_activate_resource(device_t dev, device_t child, int type, int rid,
275 struct resource *r)
276 {
277 struct pxa_smi_softc *sc;
278
279 sc = (struct pxa_smi_softc *)device_get_softc(dev);
280
281 if (type == SYS_RES_IRQ)
282 return (bus_activate_resource(dev, SYS_RES_IRQ, rid, r));
283
284 rman_set_bushandle(r, (bus_space_handle_t)pmap_mapdev(rman_get_start(r),
285 rman_get_size(r)));
286 return (rman_activate_resource(r));
287 }
288
289 static device_method_t pxa_smi_methods[] = {
290 DEVMETHOD(device_probe, pxa_smi_probe),
291 DEVMETHOD(device_attach, pxa_smi_attach),
292
293 DEVMETHOD(bus_print_child, pxa_smi_print_child),
294
295 DEVMETHOD(bus_read_ivar, pxa_smi_read_ivar),
296
297 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
298
299 DEVMETHOD(bus_alloc_resource, pxa_smi_alloc_resource),
300 DEVMETHOD(bus_release_resource, pxa_smi_release_resource),
301 DEVMETHOD(bus_activate_resource, pxa_smi_activate_resource),
302
303 {0, 0}
304 };
305
306 static driver_t pxa_smi_driver = {
307 "smi",
308 pxa_smi_methods,
309 sizeof(struct pxa_smi_softc),
310 };
311
312 static devclass_t pxa_smi_devclass;
313
314 DRIVER_MODULE(smi, pxa, pxa_smi_driver, pxa_smi_devclass, 0, 0);
315
316 static void
pxa_smi_add_device(device_t dev,const char * name,int unit)317 pxa_smi_add_device(device_t dev, const char *name, int unit)
318 {
319 device_t child;
320 int start, count;
321 struct smi_ivars *ivars;
322
323 ivars = (struct smi_ivars *)malloc(
324 sizeof(struct smi_ivars), M_PXASMI, M_WAITOK);
325 if (ivars == NULL)
326 return;
327
328 child = device_add_child(dev, name, unit);
329 if (child == NULL) {
330 free(ivars, M_PXASMI);
331 return;
332 }
333
334 device_set_ivars(child, ivars);
335 resource_list_init(&ivars->smid_resources);
336
337 start = 0;
338 count = 0;
339 resource_int_value(name, unit, "mem", &start);
340 resource_int_value(name, unit, "size", &count);
341 if (start > 0 || count > 0) {
342 resource_list_add(&ivars->smid_resources, SYS_RES_MEMORY, 0,
343 start, start + count, count);
344 ivars->smid_mem = (bus_addr_t)start;
345 }
346
347 start = -1;
348 count = 0;
349 resource_int_value(name, unit, "irq", &start);
350 if (start > -1)
351 resource_list_add(&ivars->smid_resources, SYS_RES_IRQ, 0, start,
352 start, 1);
353
354 if (resource_disabled(name, unit))
355 device_disable(child);
356 }
357