1 /*-
2 * Copyright (c) 2017 Justin Hibbits
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
21 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: stable/12/sys/powerpc/mikrotik/rb_led.c 313964 2017-02-19 19:56:12Z jhibbits $");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/module.h>
34 #include <sys/bus.h>
35 #include <sys/conf.h>
36 #include <sys/kernel.h>
37
38 #include <dev/ofw/ofw_bus.h>
39 #include <dev/ofw/openfirm.h>
40 #include <dev/led/led.h>
41
42 #include "gpio_if.h"
43
44 struct rbled_softc {
45 struct cdev *sc_led;
46 device_t sc_gpio;
47 uint32_t sc_ledpin;
48 };
49
50 static int rbled_probe(device_t);
51 static int rbled_attach(device_t);
52 static int rbled_detach(device_t);
53 static void rbled_toggle(void *, int);
54
55 static device_method_t rbled_methods[] = {
56 /* Device interface */
57 DEVMETHOD(device_probe, rbled_probe),
58 DEVMETHOD(device_attach, rbled_attach),
59 DEVMETHOD(device_detach, rbled_detach),
60
61 DEVMETHOD_END
62 };
63
64 static driver_t rbled_driver = {
65 "rbled",
66 rbled_methods,
67 sizeof(struct rbled_softc),
68 };
69
70 static devclass_t rbled_devclass;
71
72 DRIVER_MODULE(rbled, simplebus, rbled_driver, rbled_devclass, 0, 0);
73
74 static int
rbled_probe(device_t dev)75 rbled_probe(device_t dev)
76 {
77 phandle_t node;
78 const char *name;
79 cell_t gp[2];
80 char model[6];
81
82 node = ofw_bus_get_node(dev);
83
84 name = ofw_bus_get_name(dev);
85 if (name == NULL)
86 return (ENXIO);
87 if (strcmp(name, "led") != 0)
88 return (ENXIO);
89
90 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0)
91 return (ENXIO);
92
93 /* Check root model. */
94 node = OF_peer(0);
95 if (OF_getprop(node, "model", model, sizeof(model)) <= 0)
96 return (ENXIO);
97 if (strcmp(model, "RB800") != 0)
98 return (ENXIO);
99
100 device_set_desc(dev, "RouterBoard LED");
101 return (0);
102 }
103
104 static int
rbled_attach(device_t dev)105 rbled_attach(device_t dev)
106 {
107 struct rbled_softc *sc;
108 phandle_t node;
109 cell_t gp[2];
110
111 sc = device_get_softc(dev);
112 node = ofw_bus_get_node(dev);
113
114 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0)
115 return (ENXIO);
116
117 sc->sc_gpio = OF_device_from_xref(gp[0]);
118 if (sc->sc_gpio == NULL) {
119 device_printf(dev, "No GPIO resource found!\n");
120 return (ENXIO);
121 }
122 sc->sc_ledpin = gp[1];
123
124 sc->sc_led = led_create(rbled_toggle, sc, "user_led");
125
126 if (sc->sc_led == NULL)
127 return (ENXIO);
128
129 return (0);
130 }
131
132 static int
rbled_detach(device_t dev)133 rbled_detach(device_t dev)
134 {
135 struct rbled_softc *sc;
136
137 sc = device_get_softc(dev);
138 led_destroy(sc->sc_led);
139
140 return (0);
141 }
142
143 static void
rbled_toggle(void * priv,int onoff)144 rbled_toggle(void *priv, int onoff)
145 {
146 struct rbled_softc *sc = priv;
147
148 GPIO_PIN_SET(sc->sc_gpio, sc->sc_ledpin, onoff);
149 }
150