1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2018 Rubicon Communications, LLC (Netgate)
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/bus.h>
36
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/rman.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42
43 #include <machine/bus.h>
44 #include <machine/resource.h>
45 #include <machine/intr.h>
46
47 #include <dev/fdt/simplebus.h>
48
49 #include <dev/ofw/ofw_bus.h>
50 #include <dev/ofw/ofw_bus_subr.h>
51
52 #include <dt-bindings/interrupt-controller/irq.h>
53 #include "pic_if.h"
54
55 #define ICU_GRP_NSR 0x0
56 #define ICU_GRP_SR 0x1
57 #define ICU_GRP_SEI 0x4
58 #define ICU_GRP_REI 0x5
59
60 #define ICU_SETSPI_NSR_AL 0x10
61 #define ICU_SETSPI_NSR_AH 0x14
62 #define ICU_CLRSPI_NSR_AL 0x18
63 #define ICU_CLRSPI_NSR_AH 0x1c
64 #define ICU_INT_CFG(x) (0x100 + (x) * 4)
65 #define ICU_INT_ENABLE (1 << 24)
66 #define ICU_INT_EDGE (1 << 28)
67 #define ICU_INT_GROUP_SHIFT 29
68 #define ICU_INT_MASK 0x3ff
69
70 #define MV_CP110_ICU_MAX_NIRQS 207
71
72 struct mv_cp110_icu_softc {
73 device_t dev;
74 device_t parent;
75 struct resource *res;
76 struct intr_map_data_fdt *parent_map_data;
77 };
78
79 static struct resource_spec mv_cp110_icu_res_spec[] = {
80 { SYS_RES_MEMORY, 0, RF_ACTIVE | RF_SHAREABLE },
81 { -1, 0 }
82 };
83
84 static struct ofw_compat_data compat_data[] = {
85 {"marvell,cp110-icu-nsr", 1},
86 {"marvell,cp110-icu-sei", 2},
87 {NULL, 0}
88 };
89
90 #define RD4(sc, reg) bus_read_4((sc)->res, (reg))
91 #define WR4(sc, reg, val) bus_write_4((sc)->res, (reg), (val))
92
93 static int
94 mv_cp110_icu_probe(device_t dev)
95 {
96
97 if (!ofw_bus_status_okay(dev))
98 return (ENXIO);
99
100 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
101 return (ENXIO);
102
103 device_set_desc(dev, "Marvell Interrupt Consolidation Unit");
104 return (BUS_PROBE_DEFAULT);
105 }
106
107 static int
108 mv_cp110_icu_attach(device_t dev)
109 {
110 struct mv_cp110_icu_softc *sc;
111 phandle_t node, msi_parent;
112
113 sc = device_get_softc(dev);
114 sc->dev = dev;
115 node = ofw_bus_get_node(dev);
116
117 if (OF_getencprop(node, "msi-parent", &msi_parent,
118 sizeof(phandle_t)) <= 0) {
119 device_printf(dev, "cannot find msi-parent property\n");
120 return (ENXIO);
121 }
122
123 if ((sc->parent = OF_device_from_xref(msi_parent)) == NULL) {
124 device_printf(dev, "cannot find msi-parent device\n");
125 return (ENXIO);
126 }
127 if (bus_alloc_resources(dev, mv_cp110_icu_res_spec, &sc->res) != 0) {
128 device_printf(dev, "cannot allocate resources for device\n");
129 return (ENXIO);
130 }
131
132 if (intr_pic_register(dev, OF_xref_from_node(node)) == NULL) {
133 device_printf(dev, "Cannot register ICU\n");
134 goto fail;
135 }
136
137 /* Allocate GICP compatible mapping entry (2 cells) */
138 sc->parent_map_data = (struct intr_map_data_fdt *)intr_alloc_map_data(
139 INTR_MAP_DATA_FDT, sizeof(struct intr_map_data_fdt) +
140 + 3 * sizeof(phandle_t), M_WAITOK | M_ZERO);
141 return (0);
142
143 fail:
144 bus_release_resources(dev, mv_cp110_icu_res_spec, &sc->res);
145 return (ENXIO);
146 }
147
148 static struct intr_map_data *
149 mv_cp110_icu_convert_map_data(struct mv_cp110_icu_softc *sc, struct intr_map_data *data)
150 {
151 struct intr_map_data_fdt *daf;
152 uint32_t reg, irq_no, irq_type;
153
154 daf = (struct intr_map_data_fdt *)data;
155 if (daf->ncells != 2)
156 return (NULL);
157 irq_no = daf->cells[0];
158 irq_type = daf->cells[1];
159 if (irq_no >= MV_CP110_ICU_MAX_NIRQS)
160 return (NULL);
161 if (irq_type != IRQ_TYPE_LEVEL_HIGH &&
162 irq_type != IRQ_TYPE_EDGE_RISING)
163 return (NULL);
164
165 /* We rely on fact that ICU->GIC mapping is preset by bootstrap. */
166 reg = RD4(sc, ICU_INT_CFG(irq_no));
167
168 /* Construct GICP compatible mapping. */
169 sc->parent_map_data->ncells = 2;
170 sc->parent_map_data->cells[0] = reg & ICU_INT_MASK;
171 sc->parent_map_data->cells[1] = irq_type;
172
173 return ((struct intr_map_data *)sc->parent_map_data);
174 }
175
176 static int
177 mv_cp110_icu_detach(device_t dev)
178 {
179
180 return (EBUSY);
181 }
182
183 static int
184 mv_cp110_icu_activate_intr(device_t dev, struct intr_irqsrc *isrc,
185 struct resource *res, struct intr_map_data *data)
186 {
187 struct mv_cp110_icu_softc *sc;
188
189 sc = device_get_softc(dev);
190 data = mv_cp110_icu_convert_map_data(sc, data);
191 if (data == NULL)
192 return (EINVAL);
193 return (PIC_ACTIVATE_INTR(sc->parent, isrc, res, data));
194 }
195
196 static void
197 mv_cp110_icu_enable_intr(device_t dev, struct intr_irqsrc *isrc)
198 {
199 struct mv_cp110_icu_softc *sc;
200 sc = device_get_softc(dev);
201
202 PIC_ENABLE_INTR(sc->parent, isrc);
203 }
204
205 static void
206 mv_cp110_icu_disable_intr(device_t dev, struct intr_irqsrc *isrc)
207 {
208 struct mv_cp110_icu_softc *sc;
209
210 sc = device_get_softc(dev);
211
212 PIC_DISABLE_INTR(sc->parent, isrc);
213 }
214
215 static int
216 mv_cp110_icu_map_intr(device_t dev, struct intr_map_data *data,
217 struct intr_irqsrc **isrcp)
218 {
219 struct mv_cp110_icu_softc *sc;
220 struct intr_map_data_fdt *daf;
221 uint32_t reg, irq_no, irq_type;
222 int ret;
223
224 sc = device_get_softc(dev);
225
226 if (data->type != INTR_MAP_DATA_FDT)
227 return (ENOTSUP);
228
229 /* Parse original */
230 daf = (struct intr_map_data_fdt *)data;
231 if (daf->ncells != 2)
232 return (EINVAL);
233 irq_no = daf->cells[0];
234 irq_type = daf->cells[1];
235 data = mv_cp110_icu_convert_map_data(sc, data);
236 if (data == NULL)
237 return (EINVAL);
238
239 reg = RD4(sc, ICU_INT_CFG(irq_no));
240 reg |= ICU_INT_ENABLE;
241 if (irq_type == IRQ_TYPE_LEVEL_HIGH)
242 reg &= ~ICU_INT_EDGE;
243 else
244 reg |= ICU_INT_EDGE;
245 WR4(sc, ICU_INT_CFG(irq_no), reg);
246
247 ret = PIC_MAP_INTR(sc->parent, data, isrcp);
248 (*isrcp)->isrc_dev = sc->dev;
249 return (ret);
250 }
251
252 static int
253 mv_cp110_icu_deactivate_intr(device_t dev, struct intr_irqsrc *isrc,
254 struct resource *res, struct intr_map_data *data)
255 {
256 struct mv_cp110_icu_softc *sc;
257
258 sc = device_get_softc(dev);
259 data = mv_cp110_icu_convert_map_data(sc, data);
260 if (data == NULL)
261 return (EINVAL);
262
263 return (PIC_DEACTIVATE_INTR(sc->parent, isrc, res, data));
264 }
265
266 static int
267 mv_cp110_icu_setup_intr(device_t dev, struct intr_irqsrc *isrc,
268 struct resource *res, struct intr_map_data *data)
269 {
270 struct mv_cp110_icu_softc *sc;
271
272 sc = device_get_softc(dev);
273 data = mv_cp110_icu_convert_map_data(sc, data);
274 if (data == NULL)
275 return (EINVAL);
276
277 return (PIC_SETUP_INTR(sc->parent, isrc, res, data));
278 }
279
280 static int
281 mv_cp110_icu_teardown_intr(device_t dev, struct intr_irqsrc *isrc,
282 struct resource *res, struct intr_map_data *data)
283 {
284 struct mv_cp110_icu_softc *sc;
285
286 sc = device_get_softc(dev);
287 data = mv_cp110_icu_convert_map_data(sc, data);
288 if (data == NULL)
289 return (EINVAL);
290
291 return (PIC_TEARDOWN_INTR(sc->parent, isrc, res, data));
292 }
293
294 static void
295 mv_cp110_icu_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
296 {
297 struct mv_cp110_icu_softc *sc;
298
299 sc = device_get_softc(dev);
300
301 PIC_PRE_ITHREAD(sc->parent, isrc);
302 }
303
304 static void
305 mv_cp110_icu_post_ithread(device_t dev, struct intr_irqsrc *isrc)
306 {
307 struct mv_cp110_icu_softc *sc;
308
309 sc = device_get_softc(dev);
310
311 PIC_POST_ITHREAD(sc->parent, isrc);
312 }
313
314 static void
315 mv_cp110_icu_post_filter(device_t dev, struct intr_irqsrc *isrc)
316 {
317 struct mv_cp110_icu_softc *sc;
318
319 sc = device_get_softc(dev);
320
321 PIC_POST_FILTER(sc->parent, isrc);
322 }
323
324 static device_method_t mv_cp110_icu_methods[] = {
325 /* Device interface */
326 DEVMETHOD(device_probe, mv_cp110_icu_probe),
327 DEVMETHOD(device_attach, mv_cp110_icu_attach),
328 DEVMETHOD(device_detach, mv_cp110_icu_detach),
329
330 /* Interrupt controller interface */
331 DEVMETHOD(pic_activate_intr, mv_cp110_icu_activate_intr),
332 DEVMETHOD(pic_disable_intr, mv_cp110_icu_disable_intr),
333 DEVMETHOD(pic_enable_intr, mv_cp110_icu_enable_intr),
334 DEVMETHOD(pic_map_intr, mv_cp110_icu_map_intr),
335 DEVMETHOD(pic_deactivate_intr, mv_cp110_icu_deactivate_intr),
336 DEVMETHOD(pic_setup_intr, mv_cp110_icu_setup_intr),
337 DEVMETHOD(pic_teardown_intr, mv_cp110_icu_teardown_intr),
338 DEVMETHOD(pic_post_filter, mv_cp110_icu_post_filter),
339 DEVMETHOD(pic_post_ithread, mv_cp110_icu_post_ithread),
340 DEVMETHOD(pic_pre_ithread, mv_cp110_icu_pre_ithread),
341
342 DEVMETHOD_END
343 };
344
345 static devclass_t mv_cp110_icu_devclass;
346
347 static driver_t mv_cp110_icu_driver = {
348 "mv_cp110_icu",
349 mv_cp110_icu_methods,
350 sizeof(struct mv_cp110_icu_softc),
351 };
352
353 EARLY_DRIVER_MODULE(mv_cp110_icu, mv_cp110_icu_bus, mv_cp110_icu_driver,
354 mv_cp110_icu_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LAST);
Cache object: 7b40c1d7cf8241fafc5c20f582bb013e
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