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: releng/8.1/sys/arm/xscale/pxa/pxa_obio.c 179701 2008-06-10 06:06:15Z kevlo $");
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 <machine/bus.h>
36 #include <machine/intr.h>
37
38 #include <arm/xscale/pxa/pxavar.h>
39 #include <arm/xscale/pxa/pxareg.h>
40
41 static void pxa_identify(driver_t *, device_t);
42 static int pxa_probe(device_t);
43 static int pxa_attach(device_t);
44
45 static int pxa_print_child(device_t, device_t);
46
47 static int pxa_setup_intr(device_t, device_t, struct resource *, int,
48 driver_filter_t *, driver_intr_t *, void *, void **);
49 static int pxa_read_ivar(device_t, device_t, int, uintptr_t *);
50
51 static struct resource_list * pxa_get_resource_list(device_t, device_t);
52 static struct resource * pxa_alloc_resource(device_t, device_t, int,
53 int *, u_long, u_long, u_long, u_int);
54 static int pxa_release_resource(device_t, device_t, int,
55 int, struct resource *);
56 static int pxa_activate_resource(device_t, device_t,
57 int, int, struct resource *);
58
59 static struct resource * pxa_alloc_gpio_irq(device_t, device_t, int,
60 int *, u_long, u_long, u_long, u_int);
61
62 struct obio_device {
63 const char *od_name;
64 u_long od_base;
65 u_long od_size;
66 u_int od_irqs[5];
67 struct resource_list od_resources;
68 };
69
70 static struct obio_device obio_devices[] = {
71 { "icu", PXA2X0_INTCTL_BASE, PXA2X0_INTCTL_SIZE, { 0 } },
72 { "timer", PXA2X0_OST_BASE, PXA2X0_OST_SIZE, { PXA2X0_INT_OST0, PXA2X0_INT_OST1, PXA2X0_INT_OST2, PXA2X0_INT_OST3, 0 } },
73 { "dmac", PXA2X0_DMAC_BASE, PXA2X0_DMAC_SIZE, { PXA2X0_INT_DMA, 0 } },
74 { "gpio", PXA2X0_GPIO_BASE, PXA250_GPIO_SIZE, { PXA2X0_INT_GPIO0, PXA2X0_INT_GPIO1, PXA2X0_INT_GPION, 0 } },
75 { "uart", PXA2X0_FFUART_BASE, PXA2X0_FFUART_SIZE, { PXA2X0_INT_FFUART, 0 } },
76 { "uart", PXA2X0_BTUART_BASE, PXA2X0_BTUART_SIZE, { PXA2X0_INT_BTUART, 0 } },
77 { "uart", PXA2X0_STUART_BASE, PXA2X0_STUART_SIZE, { PXA2X0_INT_STUART, 0 } },
78 { "uart", PXA2X0_HWUART_BASE, PXA2X0_HWUART_SIZE, { PXA2X0_INT_HWUART, 0 } },
79 { "smi", PXA2X0_CS0_START, PXA2X0_CS_SIZE * 6, { 0 } },
80 { NULL, 0, 0, { 0 } }
81 };
82
83 void
84 pxa_identify(driver_t *driver, device_t parent)
85 {
86
87 BUS_ADD_CHILD(parent, 0, "pxa", 0);
88 }
89
90 int
91 pxa_probe(device_t dev)
92 {
93
94 device_set_desc(dev, "XScale PXA On-board IO");
95 return (0);
96 }
97
98 int
99 pxa_attach(device_t dev)
100 {
101 struct obio_softc *sc;
102 struct obio_device *od;
103 int i;
104 device_t child;
105
106 sc = device_get_softc(dev);
107
108 sc->obio_bst = obio_tag;
109
110 sc->obio_mem.rm_type = RMAN_ARRAY;
111 sc->obio_mem.rm_descr = "PXA2X0 OBIO Memory";
112 if (rman_init(&sc->obio_mem) != 0)
113 panic("pxa_attach: failed to init obio mem rman");
114 if (rman_manage_region(&sc->obio_mem, 0, PXA250_PERIPH_END) != 0)
115 panic("pxa_attach: failed to set up obio mem rman");
116
117 sc->obio_irq.rm_type = RMAN_ARRAY;
118 sc->obio_irq.rm_descr = "PXA2X0 OBIO IRQ";
119 if (rman_init(&sc->obio_irq) != 0)
120 panic("pxa_attach: failed to init obio irq rman");
121 if (rman_manage_region(&sc->obio_irq, 0, 31) != 0)
122 panic("pxa_attach: failed to set up obio irq rman (main irqs)");
123 if (rman_manage_region(&sc->obio_irq, IRQ_GPIO0, IRQ_GPIO_MAX) != 0)
124 panic("pxa_attach: failed to set up obio irq rman (gpio irqs)");
125
126 for (od = obio_devices; od->od_name != NULL; od++) {
127 resource_list_init(&od->od_resources);
128
129 resource_list_add(&od->od_resources, SYS_RES_MEMORY, 0,
130 od->od_base, od->od_base + od->od_size, od->od_size);
131
132 for (i = 0; od->od_irqs[i] != 0; i++) {
133 resource_list_add(&od->od_resources, SYS_RES_IRQ, i,
134 od->od_irqs[i], od->od_irqs[i], 1);
135 }
136
137 child = device_add_child(dev, od->od_name, -1);
138 device_set_ivars(child, od);
139 }
140
141 bus_generic_probe(dev);
142 bus_generic_attach(dev);
143
144 return (0);
145 }
146
147 static int
148 pxa_print_child(device_t dev, device_t child)
149 {
150 struct obio_device *od;
151 int retval;
152
153 od = (struct obio_device *)device_get_ivars(child);
154 if (od == NULL)
155 panic("Unknown device on pxa0");
156
157 retval = 0;
158
159 retval += bus_print_child_header(dev, child);
160
161 retval += resource_list_print_type(&od->od_resources, "at mem",
162 SYS_RES_MEMORY, "0x%08lx");
163 retval += resource_list_print_type(&od->od_resources, "irq",
164 SYS_RES_IRQ, "%ld");
165
166 retval += bus_print_child_footer(dev, child);
167
168 return (retval);
169 }
170
171 static int
172 pxa_setup_intr(device_t dev, device_t child, struct resource *irq, int flags,
173 driver_filter_t *filter, driver_intr_t *ithread, void *arg, void **cookiep)
174 {
175 struct obio_softc *sc;
176
177 sc = (struct obio_softc *)device_get_softc(dev);
178
179 BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags, filter,
180 ithread, arg, cookiep);
181 arm_unmask_irq(rman_get_start(irq));
182 return (0);
183 }
184
185 static int
186 pxa_teardown_intr(device_t dev, device_t child, struct resource *ires,
187 void *cookie)
188 {
189 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, ires, cookie));}
190
191 static int
192 pxa_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
193 {
194 struct obio_device *od;
195
196 od = (struct obio_device *)device_get_ivars(child);
197
198 switch (which) {
199 case PXA_IVAR_BASE:
200 *((u_long *)result) = od->od_base;
201 break;
202
203 default:
204 return (ENOENT);
205 }
206
207 return (0);
208 }
209
210 static struct resource_list *
211 pxa_get_resource_list(device_t dev, device_t child)
212 {
213 struct obio_device *od;
214
215 od = (struct obio_device *)device_get_ivars(child);
216
217 if (od == NULL)
218 return (NULL);
219
220 return (&od->od_resources);
221 }
222
223 static struct resource *
224 pxa_alloc_resource(device_t dev, device_t child, int type, int *rid,
225 u_long start, u_long end, u_long count, u_int flags)
226 {
227 struct obio_softc *sc;
228 struct obio_device *od;
229 struct resource *rv;
230 struct resource_list *rl;
231 struct resource_list_entry *rle;
232 struct rman *rm;
233 int needactivate;
234
235 sc = (struct obio_softc *)device_get_softc(dev);
236 od = (struct obio_device *)device_get_ivars(child);
237 rl = &od->od_resources;
238
239 rle = resource_list_find(rl, type, *rid);
240 if (rle == NULL) {
241 /* We can allocate GPIO-based IRQs lazily. */
242 if (type == SYS_RES_IRQ)
243 return (pxa_alloc_gpio_irq(dev, child, type, rid,
244 start, end, count, flags));
245 return (NULL);
246 }
247 if (rle->res != NULL)
248 panic("pxa_alloc_resource: resource is busy");
249
250 switch (type) {
251 case SYS_RES_IRQ:
252 rm = &sc->obio_irq;
253 break;
254
255 case SYS_RES_MEMORY:
256 rm = &sc->obio_mem;
257 break;
258
259 default:
260 return (NULL);
261 }
262
263 needactivate = flags & RF_ACTIVE;
264 flags &= ~RF_ACTIVE;
265 rv = rman_reserve_resource(rm, rle->start, rle->end, rle->count, flags,
266 child);
267 if (rv == NULL)
268 return (NULL);
269 rle->res = rv;
270 rman_set_rid(rv, *rid);
271 if (type == SYS_RES_MEMORY) {
272 rman_set_bustag(rv, sc->obio_bst);
273 rman_set_bushandle(rv, rle->start);
274 }
275
276 if (needactivate) {
277 if (bus_activate_resource(child, type, *rid, rv)) {
278 rman_release_resource(rv);
279 return (NULL);
280 }
281 }
282
283 return (rv);
284 }
285
286 static int
287 pxa_release_resource(device_t dev, device_t child, int type, int rid,
288 struct resource *r)
289 {
290 struct obio_device *od;
291 struct resource_list *rl;
292 struct resource_list_entry *rle;
293
294 od = (struct obio_device *)device_get_ivars(child);
295 rl = &od->od_resources;
296
297 if (type == SYS_RES_IOPORT)
298 type = SYS_RES_MEMORY;
299
300 rle = resource_list_find(rl, type, rid);
301
302 if (!rle)
303 panic("pxa_release_resource: can't find resource");
304 if (!rle->res)
305 panic("pxa_release_resource: resource entry is not busy");
306
307 rman_release_resource(rle->res);
308 rle->res = NULL;
309
310 return (0);
311 }
312
313 static int
314 pxa_activate_resource(device_t dev, device_t child, int type, int rid,
315 struct resource *r)
316 {
317
318 return (rman_activate_resource(r));
319 }
320
321 static device_method_t pxa_methods[] = {
322 DEVMETHOD(device_identify, pxa_identify),
323 DEVMETHOD(device_probe, pxa_probe),
324 DEVMETHOD(device_attach, pxa_attach),
325
326 DEVMETHOD(bus_print_child, pxa_print_child),
327
328 DEVMETHOD(bus_read_ivar, pxa_read_ivar),
329 DEVMETHOD(bus_setup_intr, pxa_setup_intr),
330 DEVMETHOD(bus_teardown_intr, pxa_teardown_intr),
331
332 DEVMETHOD(bus_get_resource_list, pxa_get_resource_list),
333 DEVMETHOD(bus_alloc_resource, pxa_alloc_resource),
334 DEVMETHOD(bus_release_resource, pxa_release_resource),
335 DEVMETHOD(bus_activate_resource, pxa_activate_resource),
336
337 {0, 0}
338 };
339
340 static driver_t pxa_driver = {
341 "pxa",
342 pxa_methods,
343 sizeof(struct obio_softc),
344 };
345
346 static devclass_t pxa_devclass;
347
348 DRIVER_MODULE(pxa, nexus, pxa_driver, pxa_devclass, 0, 0);
349
350 static struct resource *
351 pxa_alloc_gpio_irq(device_t dev, device_t child, int type, int *rid,
352 u_long start, u_long end, u_long count, u_int flags)
353 {
354 struct obio_softc *sc;
355 struct obio_device *od;
356 struct resource_list *rl;
357 struct resource_list_entry *rle;
358 struct resource *rv;
359 struct rman *rm;
360 int needactivate;
361
362 sc = device_get_softc(dev);
363 od = device_get_ivars(child);
364 rl = &od->od_resources;
365 rm = &sc->obio_irq;
366
367 needactivate = flags & RF_ACTIVE;
368 flags &= ~RF_ACTIVE;
369 rv = rman_reserve_resource(rm, start, end, count, flags, child);
370 if (rv == NULL)
371 return (NULL);
372
373 resource_list_add(rl, type, *rid, start, end, count);
374 rle = resource_list_find(rl, type, *rid);
375 if (rle == NULL)
376 panic("pxa_alloc_gpio_irq: unexpectedly can't find resource");
377
378 rle->res = rv;
379 rle->start = rman_get_start(rv);
380 rle->end = rman_get_end(rv);
381 rle->count = count;
382
383 if (needactivate) {
384 if (bus_activate_resource(child, type, *rid, rv)) {
385 rman_release_resource(rv);
386 return (NULL);
387 }
388 }
389
390 if (bootverbose)
391 device_printf(dev, "lazy allocation of irq %ld for %s\n",
392 start, device_get_nameunit(child));
393
394 return (rv);
395 }
Cache object: f5985c9da9f87e0ca43ec29a6e3e3249
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