1 /*-
2 * Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@freebsd.org>
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 AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, 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 /* General Register File for Rockchip RK30xx */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/11.1/sys/arm/rockchip/rk30xx_grf.c 281085 2015-04-04 21:34:26Z andrew $");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/malloc.h>
38 #include <sys/rman.h>
39 #include <sys/timeet.h>
40 #include <sys/timetc.h>
41 #include <sys/watchdog.h>
42 #include <machine/bus.h>
43 #include <machine/cpu.h>
44 #include <machine/intr.h>
45
46 #include <dev/fdt/fdt_common.h>
47 #include <dev/ofw/openfirm.h>
48 #include <dev/ofw/ofw_bus.h>
49 #include <dev/ofw/ofw_bus_subr.h>
50
51 #include <machine/bus.h>
52
53 #include "rk30xx_grf.h"
54
55 struct rk30_grf_softc {
56 struct resource *res;
57 bus_space_tag_t bst;
58 bus_space_handle_t bsh;
59 };
60
61 static struct rk30_grf_softc *rk30_grf_sc = NULL;
62
63 #define grf_read_4(sc, reg) \
64 bus_space_read_4((sc)->bst, (sc)->bsh, (reg))
65 #define grf_write_4(sc, reg, val) \
66 bus_space_write_4((sc)->bst, (sc)->bsh, (reg), (val))
67
68 static int
69 rk30_grf_probe(device_t dev)
70 {
71
72 if (!ofw_bus_status_okay(dev))
73 return (ENXIO);
74
75 if (ofw_bus_is_compatible(dev, "rockchip,rk30xx-grf")) {
76 device_set_desc(dev, "RK30XX General Register File");
77 return(BUS_PROBE_DEFAULT);
78 }
79
80 return (ENXIO);
81 }
82
83 static int
84 rk30_grf_attach(device_t dev)
85 {
86 struct rk30_grf_softc *sc = device_get_softc(dev);
87 int rid = 0;
88
89 if (rk30_grf_sc)
90 return (ENXIO);
91
92 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
93 if (!sc->res) {
94 device_printf(dev, "could not allocate resource\n");
95 return (ENXIO);
96 }
97
98 sc->bst = rman_get_bustag(sc->res);
99 sc->bsh = rman_get_bushandle(sc->res);
100
101 rk30_grf_sc = sc;
102
103 return (0);
104 }
105
106 static device_method_t rk30_grf_methods[] = {
107 DEVMETHOD(device_probe, rk30_grf_probe),
108 DEVMETHOD(device_attach, rk30_grf_attach),
109 { 0, 0 }
110 };
111
112 static driver_t rk30_grf_driver = {
113 "rk30_grf",
114 rk30_grf_methods,
115 sizeof(struct rk30_grf_softc),
116 };
117
118 static devclass_t rk30_grf_devclass;
119
120 DRIVER_MODULE(rk30_grf, simplebus, rk30_grf_driver, rk30_grf_devclass, 0, 0);
121
122 void
123 rk30_grf_gpio_pud(uint32_t bank, uint32_t pin, uint32_t state)
124 {
125 uint32_t offset;
126
127 offset = GRF_GPIO0B_PULL - 4 + (bank * 16) + ((pin / 8) * 4);
128 pin = (7 - (pin % 8)) * 2;
129 grf_write_4(rk30_grf_sc, offset, (0x3 << (16 + pin)) | (state << pin));
130 }
131
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