2 * Copyright (c) 2017 Emmanuel Vadot <manu@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
36 #include <dev/extres/clk/clk.h>
38 #include <arm/allwinner/clkng/aw_clk.h>
39 #include <arm/allwinner/clkng/aw_clk_prediv_mux.h>
41 #include "clkdev_if.h"
44 * clknode for clocks matching the formula :
46 * clk = clkin / prediv / div
48 * and where prediv is conditional
52 struct aw_clk_prediv_mux_sc {
58 struct aw_clk_factor div;
59 struct aw_clk_factor prediv;
64 #define WRITE4(_clk, off, val) \
65 CLKDEV_WRITE_4(clknode_get_device(_clk), off, val)
66 #define READ4(_clk, off, val) \
67 CLKDEV_READ_4(clknode_get_device(_clk), off, val)
68 #define MODIFY4(_clk, off, clr, set ) \
69 CLKDEV_MODIFY_4(clknode_get_device(_clk), off, clr, set)
70 #define DEVICE_LOCK(_clk) \
71 CLKDEV_DEVICE_LOCK(clknode_get_device(_clk))
72 #define DEVICE_UNLOCK(_clk) \
73 CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk))
76 aw_clk_prediv_mux_init(struct clknode *clk, device_t dev)
78 struct aw_clk_prediv_mux_sc *sc;
81 sc = clknode_get_softc(clk);
84 READ4(clk, sc->offset, &val);
87 /* Init the current parent */
88 val = (val & sc->mux_mask) >> sc->mux_shift;
89 clknode_init_parent_idx(clk, val);
95 aw_clk_prediv_mux_set_mux(struct clknode *clk, int index)
97 struct aw_clk_prediv_mux_sc *sc;
100 sc = clknode_get_softc(clk);
103 READ4(clk, sc->offset, &val);
104 val &= ~sc->mux_mask;
105 val |= index << sc->mux_shift;
106 WRITE4(clk, sc->offset, val);
113 aw_clk_prediv_mux_recalc(struct clknode *clk, uint64_t *freq)
115 struct aw_clk_prediv_mux_sc *sc;
116 uint32_t val, div, prediv;
118 sc = clknode_get_softc(clk);
121 READ4(clk, sc->offset, &val);
124 div = aw_clk_get_factor(val, &sc->div);
125 prediv = aw_clk_get_factor(val, &sc->prediv);
127 *freq = *freq / prediv / div;
131 static clknode_method_t aw_prediv_mux_clknode_methods[] = {
132 /* Device interface */
133 CLKNODEMETHOD(clknode_init, aw_clk_prediv_mux_init),
134 CLKNODEMETHOD(clknode_set_mux, aw_clk_prediv_mux_set_mux),
135 CLKNODEMETHOD(clknode_recalc_freq, aw_clk_prediv_mux_recalc),
139 DEFINE_CLASS_1(aw_prediv_mux_clknode, aw_prediv_mux_clknode_class,
140 aw_prediv_mux_clknode_methods, sizeof(struct aw_clk_prediv_mux_sc),
144 aw_clk_prediv_mux_register(struct clkdom *clkdom, struct aw_clk_prediv_mux_def *clkdef)
147 struct aw_clk_prediv_mux_sc *sc;
149 clk = clknode_create(clkdom, &aw_prediv_mux_clknode_class, &clkdef->clkdef);
153 sc = clknode_get_softc(clk);
155 sc->offset = clkdef->offset;
157 sc->mux_shift = clkdef->mux_shift;
158 sc->mux_mask = ((1 << clkdef->mux_width) - 1) << sc->mux_shift;
160 sc->div.shift = clkdef->div.shift;
161 sc->div.mask = ((1 << clkdef->div.width) - 1) << sc->div.shift;
162 sc->div.value = clkdef->div.value;
163 sc->div.cond_shift = clkdef->div.cond_shift;
164 sc->div.cond_mask = ((1 << clkdef->div.cond_width) - 1) << sc->div.shift;
165 sc->div.cond_value = clkdef->div.cond_value;
166 sc->div.flags = clkdef->div.flags;
168 sc->prediv.shift = clkdef->prediv.shift;
169 sc->prediv.mask = ((1 << clkdef->prediv.width) - 1) << sc->prediv.shift;
170 sc->prediv.value = clkdef->prediv.value;
171 sc->prediv.cond_shift = clkdef->prediv.cond_shift;
172 if (clkdef->prediv.cond_width != 0)
173 sc->prediv.cond_mask = ((1 << clkdef->prediv.cond_width) - 1) << sc->prediv.shift;
175 sc->prediv.cond_mask = clkdef->prediv.cond_mask;
176 sc->prediv.cond_value = clkdef->prediv.cond_value;
177 sc->prediv.flags = clkdef->prediv.flags;
179 sc->flags = clkdef->flags;
181 clknode_register(clkdom, clk);