1 /*-
2 * Copyright (c) 2015 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under
6 * the sponsorship of the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
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 #include <sys/kernel.h>
37 #include <sys/module.h>
38
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41 #include <dev/fdt/simplebus.h>
42
43 #include <machine/bus.h>
44 #include <machine/resource.h>
45
46 #include "thunder_mdio_var.h"
47
48 static int thunder_mdio_fdt_probe(device_t);
49 static int thunder_mdio_fdt_attach(device_t);
50
51 static device_method_t thunder_mdio_fdt_methods[] = {
52 /* Device interface */
53 DEVMETHOD(device_probe, thunder_mdio_fdt_probe),
54 DEVMETHOD(device_attach, thunder_mdio_fdt_attach),
55
56 /* End */
57 DEVMETHOD_END
58 };
59
60 DEFINE_CLASS_1(thunder_mdio, thunder_mdio_fdt_driver, thunder_mdio_fdt_methods,
61 sizeof(struct thunder_mdio_softc), thunder_mdio_driver);
62
63 static devclass_t thunder_mdio_fdt_devclass;
64
65 EARLY_DRIVER_MODULE(thunder_mdio, ofwbus, thunder_mdio_fdt_driver,
66 thunder_mdio_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
67 EARLY_DRIVER_MODULE(thunder_mdio, mdionexus, thunder_mdio_fdt_driver,
68 thunder_mdio_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
69
70 static struct ofw_compat_data mdio_compat_data[] = {
71 {"cavium,octeon-3860-mdio", true},
72 {"cavium,thunder-8890-mdio", true},
73 {NULL, false}
74 };
75
76 static int
77 thunder_mdio_fdt_probe(device_t dev)
78 {
79
80 if (!ofw_bus_status_okay(dev))
81 return (ENXIO);
82 if (!ofw_bus_search_compatible(dev, mdio_compat_data)->ocd_data)
83 return (ENXIO);
84
85 device_set_desc(dev, THUNDER_MDIO_DEVSTR);
86 return (BUS_PROBE_DEFAULT);
87 }
88
89 static int
90 thunder_mdio_fdt_attach(device_t dev)
91 {
92 phandle_t node;
93 int ret;
94
95 /* Call core attach */
96 ret = thunder_mdio_attach(dev);
97 if (ret != 0)
98 return (ret);
99 /*
100 * Register device to this node/xref.
101 * Thanks to that we will be able to retrieve device_t structure
102 * while holding only node reference acquired from FDT.
103 */
104 node = ofw_bus_get_node(dev);
105 OF_device_register_xref(OF_xref_from_node(node), dev);
106
107 return (0);
108 }
109
110 struct mdionexus_softc {
111 struct simplebus_softc simplebus_sc;
112 };
113
114 static device_probe_t mdionexus_fdt_probe;
115 static device_attach_t mdionexus_fdt_attach;
116
117 static const struct ofw_bus_devinfo * mdionexus_ofw_get_devinfo(device_t,
118 device_t);
119
120 static device_method_t mdionexus_fdt_methods[] = {
121 /* Device interface */
122 DEVMETHOD(device_probe, mdionexus_fdt_probe),
123 DEVMETHOD(device_attach, mdionexus_fdt_attach),
124
125 /* Bus interface */
126 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
127 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
128 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
129
130 /* ofw_bus interface */
131 DEVMETHOD(ofw_bus_get_devinfo, mdionexus_ofw_get_devinfo),
132 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
133 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
134 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
135 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
136 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
137
138 DEVMETHOD_END
139 };
140
141 DEFINE_CLASS_0(mdionexus, mdionexus_fdt_driver, mdionexus_fdt_methods,
142 sizeof(struct mdionexus_softc));
143
144 static devclass_t mdionexus_fdt_devclass;
145
146 EARLY_DRIVER_MODULE(mdionexus, mrmlbus, mdionexus_fdt_driver,
147 mdionexus_fdt_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
148
149 static int mdionexus_ofw_fill_ranges(phandle_t, struct simplebus_softc *);
150 static int mdionexus_ofw_bus_attach(device_t);
151
152 static int
153 mdionexus_fdt_probe(device_t dev)
154 {
155
156 if (!ofw_bus_status_okay(dev))
157 return (ENXIO);
158
159 if (!ofw_bus_is_compatible(dev, "cavium,thunder-8890-mdio-nexus"))
160 return (ENXIO);
161
162 device_set_desc(dev, "Cavium ThunderX MDIO nexus");
163 return (BUS_PROBE_SPECIFIC);
164 }
165
166 static int
167 mdionexus_fdt_attach(device_t dev)
168 {
169 int err;
170
171 err = mdionexus_ofw_bus_attach(dev);
172 if (err != 0)
173 return (err);
174
175 return (bus_generic_attach(dev));
176 }
177
178 /* OFW bus interface */
179 struct mdionexus_ofw_devinfo {
180 struct ofw_bus_devinfo di_dinfo;
181 struct resource_list di_rl;
182 };
183
184 static const struct ofw_bus_devinfo *
185 mdionexus_ofw_get_devinfo(device_t bus __unused, device_t child)
186 {
187 struct mdionexus_ofw_devinfo *di;
188
189 di = device_get_ivars(child);
190 return (&di->di_dinfo);
191 }
192
193 /* Helper functions */
194
195 static int
196 mdionexus_ofw_fill_ranges(phandle_t node, struct simplebus_softc *sc)
197 {
198 int host_address_cells;
199 cell_t *base_ranges;
200 ssize_t nbase_ranges;
201 int err;
202 int i, j, k;
203
204 err = OF_searchencprop(OF_parent(node), "#address-cells",
205 &host_address_cells, sizeof(host_address_cells));
206 if (err <= 0)
207 return (-1);
208
209 nbase_ranges = OF_getproplen(node, "ranges");
210 if (nbase_ranges < 0)
211 return (-1);
212 sc->nranges = nbase_ranges / sizeof(cell_t) /
213 (sc->acells + host_address_cells + sc->scells);
214 if (sc->nranges == 0)
215 return (0);
216
217 sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
218 M_THUNDER_MDIO, M_WAITOK);
219 base_ranges = malloc(nbase_ranges, M_THUNDER_MDIO, M_WAITOK);
220 OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
221
222 for (i = 0, j = 0; i < sc->nranges; i++) {
223 sc->ranges[i].bus = 0;
224 for (k = 0; k < sc->acells; k++) {
225 sc->ranges[i].bus <<= 32;
226 sc->ranges[i].bus |= base_ranges[j++];
227 }
228 sc->ranges[i].host = 0;
229 for (k = 0; k < host_address_cells; k++) {
230 sc->ranges[i].host <<= 32;
231 sc->ranges[i].host |= base_ranges[j++];
232 }
233 sc->ranges[i].size = 0;
234 for (k = 0; k < sc->scells; k++) {
235 sc->ranges[i].size <<= 32;
236 sc->ranges[i].size |= base_ranges[j++];
237 }
238 }
239
240 free(base_ranges, M_THUNDER_MDIO);
241 return (sc->nranges);
242 }
243
244 static int
245 mdionexus_ofw_bus_attach(device_t dev)
246 {
247 struct simplebus_softc *sc;
248 struct mdionexus_ofw_devinfo *di;
249 device_t child;
250 phandle_t parent, node;
251
252 parent = ofw_bus_get_node(dev);
253 simplebus_init(dev, parent);
254
255 sc = (struct simplebus_softc *)device_get_softc(dev);
256
257 if (mdionexus_ofw_fill_ranges(parent, sc) < 0) {
258 device_printf(dev, "could not get ranges\n");
259 return (ENXIO);
260 }
261 /* Iterate through all bus subordinates */
262 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
263 /* Allocate and populate devinfo. */
264 di = malloc(sizeof(*di), M_THUNDER_MDIO, M_WAITOK | M_ZERO);
265 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node) != 0) {
266 free(di, M_THUNDER_MDIO);
267 continue;
268 }
269
270 /* Initialize and populate resource list. */
271 resource_list_init(&di->di_rl);
272 ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells,
273 &di->di_rl);
274 ofw_bus_intr_to_rl(dev, node, &di->di_rl, NULL);
275
276 /* Add newbus device for this FDT node */
277 child = device_add_child(dev, NULL, -1);
278 if (child == NULL) {
279 resource_list_free(&di->di_rl);
280 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
281 free(di, M_THUNDER_MDIO);
282 continue;
283 }
284
285 device_set_ivars(child, di);
286 }
287
288 return (0);
289 }
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