2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018 Rubicon Communications, LLC (Netgate)
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/mutex.h>
41 #include <machine/bus.h>
43 #include <dev/fdt/simplebus.h>
45 #include <dev/ofw/ofw_bus.h>
46 #include <dev/ofw/ofw_bus_subr.h>
48 #include <dev/fdt/simple_mfd.h>
50 device_t simple_mfd_add_device(device_t dev, phandle_t node, u_int order,
51 const char *name, int unit, struct simplebus_devinfo *di);
52 struct simplebus_devinfo *simple_mfd_setup_dinfo(device_t dev, phandle_t node, struct simplebus_devinfo *di);
54 #include "syscon_if.h"
55 #include <dev/extres/syscon/syscon.h>
57 MALLOC_DECLARE(M_SYSCON);
59 static uint32_t simple_mfd_syscon_read_4(struct syscon *syscon, bus_size_t offset);
60 static int simple_mfd_syscon_write_4(struct syscon *syscon, bus_size_t offset,
62 static int simple_mfd_syscon_modify_4(struct syscon *syscon, bus_size_t offset,
63 uint32_t clear_bits, uint32_t set_bits);
65 #define SYSCON_LOCK(_sc) mtx_lock_spin(&(_sc)->mtx)
66 #define SYSCON_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->mtx)
67 #define SYSCON_LOCK_INIT(_sc) mtx_init(&(_sc)->mtx, \
68 device_get_nameunit((_sc)->dev), "syscon", MTX_SPIN)
69 #define SYSCON_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->mtx);
70 #define SYSCON_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_OWNED);
71 #define SYSCON_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_NOTOWNED);
73 static syscon_method_t simple_mfd_syscon_methods[] = {
74 SYSCONMETHOD(syscon_read_4, simple_mfd_syscon_read_4),
75 SYSCONMETHOD(syscon_write_4, simple_mfd_syscon_write_4),
76 SYSCONMETHOD(syscon_modify_4, simple_mfd_syscon_modify_4),
80 DEFINE_CLASS_1(simple_mfd_syscon, simple_mfd_syscon_class,
81 simple_mfd_syscon_methods, 0, syscon_class);
84 simple_mfd_syscon_read_4(struct syscon *syscon, bus_size_t offset)
86 struct simple_mfd_softc *sc;
89 sc = device_get_softc(syscon->pdev);
92 val = bus_read_4(sc->mem_res, offset);
98 simple_mfd_syscon_write_4(struct syscon *syscon, bus_size_t offset,
101 struct simple_mfd_softc *sc;
103 sc = device_get_softc(syscon->pdev);
106 bus_write_4(sc->mem_res, offset, val);
112 simple_mfd_syscon_modify_4(struct syscon *syscon, bus_size_t offset,
113 uint32_t clear_bits, uint32_t set_bits)
115 struct simple_mfd_softc *sc;
118 sc = device_get_softc(syscon->pdev);
121 val = bus_read_4(sc->mem_res, offset);
124 bus_write_4(sc->mem_res, offset, val);
130 simple_mfd_probe(device_t dev)
133 if (!ofw_bus_status_okay(dev))
135 if (!ofw_bus_is_compatible(dev, "simple-mfd"))
138 device_set_desc(dev, "Simple MFD (Multi-Functions Device)");
140 return (BUS_PROBE_GENERIC);
144 simple_mfd_attach(device_t dev)
146 struct simple_mfd_softc *sc;
147 phandle_t node, child;
151 sc = device_get_softc(dev);
152 node = ofw_bus_get_node(dev);
157 /* Parse address-cells and size-cells from the parent node as a fallback */
158 if (OF_getencprop(node, "#address-cells", &sc->sc.acells,
159 sizeof(sc->sc.acells)) == -1) {
160 if (OF_getencprop(OF_parent(node), "#address-cells", &sc->sc.acells,
161 sizeof(sc->sc.acells)) == -1) {
165 if (OF_getencprop(node, "#size-cells", &sc->sc.scells,
166 sizeof(sc->sc.scells)) == -1) {
167 if (OF_getencprop(OF_parent(node), "#size-cells", &sc->sc.scells,
168 sizeof(sc->sc.scells)) == -1) {
173 /* If the node has a ranges prop, parse it so children mapping will be done correctly */
174 if (OF_hasprop(node, "ranges")) {
175 if (simplebus_fill_ranges(node, &sc->sc) < 0) {
176 device_printf(dev, "could not get ranges\n");
181 /* Attach child devices */
182 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
183 cdev = simple_mfd_add_device(dev, child, 0, NULL, -1, NULL);
185 device_probe_and_attach(cdev);
188 if (ofw_bus_is_compatible(dev, "syscon")) {
189 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
191 if (sc->mem_res == NULL) {
193 "Cannot allocate memory resource\n");
197 SYSCON_LOCK_INIT(sc);
198 sc->syscon = syscon_create_ofw_node(dev,
199 &simple_mfd_syscon_class, ofw_bus_get_node(dev));
200 if (sc->syscon == NULL) {
202 "Failed to create/register syscon\n");
206 return (bus_generic_attach(dev));
210 simple_mfd_detach(device_t dev)
212 struct simple_mfd_softc *sc;
214 sc = device_get_softc(dev);
215 if (ofw_bus_is_compatible(dev, "syscon")) {
216 if (sc->syscon != NULL) {
217 syscon_unregister(sc->syscon);
218 free(sc->syscon, M_SYSCON);
221 SYSCON_LOCK_DESTROY(sc);
223 if (sc->mem_res != NULL)
224 bus_release_resource(dev, SYS_RES_MEMORY, 0,
230 struct simplebus_devinfo *
231 simple_mfd_setup_dinfo(device_t dev, phandle_t node,
232 struct simplebus_devinfo *di)
234 struct simplebus_softc *sc;
235 struct simplebus_devinfo *ndi;
237 sc = device_get_softc(dev);
239 ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
242 if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) {
248 /* reg resources is from the parent but interrupts is on the node itself */
249 resource_list_init(&ndi->rl);
250 ofw_bus_reg_to_rl(dev, OF_parent(node), sc->acells, sc->scells, &ndi->rl);
251 ofw_bus_intr_to_rl(dev, node, &ndi->rl, NULL);
257 simple_mfd_add_device(device_t dev, phandle_t node, u_int order,
258 const char *name, int unit, struct simplebus_devinfo *di)
260 struct simplebus_devinfo *ndi;
263 if ((ndi = simple_mfd_setup_dinfo(dev, node, di)) == NULL)
265 cdev = device_add_child_ordered(dev, order, name, unit);
267 device_printf(dev, "<%s>: device_add_child failed\n",
268 ndi->obdinfo.obd_name);
269 resource_list_free(&ndi->rl);
270 ofw_bus_gen_destroy_devinfo(&ndi->obdinfo);
275 device_set_ivars(cdev, ndi);
280 static device_method_t simple_mfd_methods[] = {
281 /* Device interface */
282 DEVMETHOD(device_probe, simple_mfd_probe),
283 DEVMETHOD(device_attach, simple_mfd_attach),
284 DEVMETHOD(device_detach, simple_mfd_detach),
289 DEFINE_CLASS_1(simple_mfd, simple_mfd_driver, simple_mfd_methods,
290 sizeof(struct simple_mfd_softc), simplebus_driver);
292 static devclass_t simple_mfd_devclass;
294 EARLY_DRIVER_MODULE(simple_mfd, simplebus, simple_mfd_driver,
295 simple_mfd_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_LATE);
296 MODULE_VERSION(simple_mfd, 1);