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/extres/syscon/syscon.h>
48
49 #include <dev/fdt/fdt_pinctrl.h>
50
51 #include <dev/ofw/ofw_bus.h>
52 #include <dev/ofw/ofw_bus_subr.h>
53
54 #include "syscon_if.h"
55
56 #define PINS_PER_REG 8
57 #define BITS_PER_PIN 4
58 #define PINS_MASK 0xf
59 #define MAX_PIN_FUNC 5
60
61 struct mv_pins {
62 const char *name;
63 const char *functions[MAX_PIN_FUNC];
64 };
65
66 struct mv_padconf {
67 const struct mv_pins *pins;
68 size_t npins;
69 };
70
71 const static struct mv_pins ap806_pins[] = {
72 {"mpp0", {"gpio", "sdio", NULL, "spi0"}},
73 {"mpp1", {"gpio", "sdio", NULL, "spi0"}},
74 {"mpp2", {"gpio", "sdio", NULL, "spi0"}},
75 {"mpp3", {"gpio", "sdio", NULL, "spi0"}},
76 {"mpp4", {"gpio", "sdio", NULL, "i2c0"}},
77 {"mpp5", {"gpio", "sdio", NULL, "i2c0"}},
78 {"mpp6", {"gpio", "sdio", NULL, NULL}},
79 {"mpp7", {"gpio", "sdio", NULL, "uart1"}},
80 {"mpp8", {"gpio", "sdio", NULL, "uart1"}},
81 {"mpp9", {"gpio", "sdio", NULL, "spi0"}},
82 {"mpp10", {"gpio", "sdio", NULL, NULL}},
83 {"mpp11", {"gpio", NULL, NULL, "uart0"}},
84 {"mpp12", {"gpio", "sdio", "sdio", NULL}},
85 {"mpp13", {"gpio", NULL, NULL}},
86 {"mpp14", {"gpio", NULL, NULL}},
87 {"mpp15", {"gpio", NULL, NULL}},
88 {"mpp16", {"gpio", NULL, NULL}},
89 {"mpp17", {"gpio", NULL, NULL}},
90 {"mpp18", {"gpio", NULL, NULL}},
91 {"mpp19", {"gpio", NULL, NULL, "uart0", "sdio"}},
92 };
93
94 const struct mv_padconf ap806_padconf = {
95 .npins = nitems(ap806_pins),
96 .pins = ap806_pins,
97 };
98
99 struct mv_pinctrl_softc {
100 device_t dev;
101 struct syscon *syscon;
102
103 struct mv_padconf *padconf;
104 };
105
106 static struct ofw_compat_data compat_data[] = {
107 {"marvell,ap806-pinctrl", (uintptr_t)&ap806_padconf},
108 {NULL, 0}
109 };
110
111 #define RD4(sc, reg) SYSCON_READ_4((sc)->syscon, (reg))
112 #define WR4(sc, reg, val) SYSCON_WRITE_4((sc)->syscon, (reg), (val))
113
114 static void
115 mv_pinctrl_configure_pin(struct mv_pinctrl_softc *sc, uint32_t pin,
116 uint32_t function)
117 {
118 uint32_t offset, shift, reg;
119
120 offset = (pin / PINS_PER_REG) * BITS_PER_PIN;
121 shift = (pin % PINS_PER_REG) * BITS_PER_PIN;
122 reg = RD4(sc, offset);
123 reg &= ~(PINS_MASK << shift);
124 reg |= function << shift;
125 WR4(sc, offset, reg);
126 }
127
128 static int
129 mv_pinctrl_configure_pins(device_t dev, phandle_t cfgxref)
130 {
131 struct mv_pinctrl_softc *sc;
132 phandle_t node;
133 char *function;
134 const char **pins;
135 int i, pin_num, pin_func, npins;
136
137 sc = device_get_softc(dev);
138 node = OF_node_from_xref(cfgxref);
139
140 if (OF_getprop_alloc(node, "marvell,function",
141 (void **)&function) == -1)
142 return (ENOMEM);
143
144 npins = ofw_bus_string_list_to_array(node, "marvell,pins", &pins);
145 if (npins == -1)
146 return (ENOMEM);
147
148 for (i = 0; i < npins; i++) {
149 for (pin_num = 0; pin_num < sc->padconf->npins; pin_num++) {
150 if (strcmp(pins[i], sc->padconf->pins[pin_num].name) == 0)
151 break;
152 }
153 if (pin_num == sc->padconf->npins)
154 continue;
155
156 for (pin_func = 0; pin_func < MAX_PIN_FUNC; pin_func++)
157 if (sc->padconf->pins[pin_num].functions[pin_func] &&
158 strcmp(function, sc->padconf->pins[pin_num].functions[pin_func]) == 0)
159 break;
160
161 if (pin_func == MAX_PIN_FUNC)
162 continue;
163
164 mv_pinctrl_configure_pin(sc, pin_num, pin_func);
165 }
166
167 OF_prop_free(pins);
168
169 return (0);
170 }
171
172 static int
173 mv_pinctrl_probe(device_t dev)
174 {
175
176 if (!ofw_bus_status_okay(dev))
177 return (ENXIO);
178
179 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
180 return (ENXIO);
181
182 device_set_desc(dev, "Marvell Pinctrl controller");
183 return (BUS_PROBE_DEFAULT);
184 }
185
186 static int
187 mv_pinctrl_attach(device_t dev)
188 {
189 struct mv_pinctrl_softc *sc;
190 phandle_t node;
191
192 sc = device_get_softc(dev);
193 sc->dev = dev;
194 sc->padconf = (struct mv_padconf *)
195 ofw_bus_search_compatible(dev,compat_data)->ocd_data;
196
197 if (SYSCON_GET_HANDLE(sc->dev, &sc->syscon) != 0 ||
198 sc->syscon == NULL) {
199 device_printf(dev, "cannot get syscon for device\n");
200 return (ENXIO);
201 }
202
203 node = ofw_bus_get_node(dev);
204
205 fdt_pinctrl_register(dev, "marvell,pins");
206 fdt_pinctrl_configure_tree(dev);
207
208 return (0);
209 }
210
211 static int
212 mv_pinctrl_detach(device_t dev)
213 {
214
215 return (EBUSY);
216 }
217
218 static device_method_t mv_pinctrl_methods[] = {
219 /* Device interface */
220 DEVMETHOD(device_probe, mv_pinctrl_probe),
221 DEVMETHOD(device_attach, mv_pinctrl_attach),
222 DEVMETHOD(device_detach, mv_pinctrl_detach),
223
224 /* fdt_pinctrl interface */
225 DEVMETHOD(fdt_pinctrl_configure,mv_pinctrl_configure_pins),
226
227 DEVMETHOD_END
228 };
229
230 static devclass_t mv_pinctrl_devclass;
231
232 static driver_t mv_pinctrl_driver = {
233 "mv_pinctrl",
234 mv_pinctrl_methods,
235 sizeof(struct mv_pinctrl_softc),
236 };
237
238 EARLY_DRIVER_MODULE(mv_pinctrl, simplebus, mv_pinctrl_driver,
239 mv_pinctrl_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE);
Cache object: 390d1fbc2bd42c78cdaa56424b461957
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