2 * Copyright (c) 2017 Emmanuel Vadot <manu@freebsd.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
18 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
20 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
21 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
35 #include <dev/extres/clk/clk.h>
37 #include <arm/allwinner/clkng/aw_clk.h>
38 #include <arm/allwinner/clkng/aw_clk_prediv_mux.h>
40 #include "clkdev_if.h"
43 * clknode for clocks matching the formula :
45 * clk = clkin / prediv / div
47 * and where prediv is conditional
51 struct aw_clk_prediv_mux_sc {
57 struct aw_clk_factor div;
58 struct aw_clk_factor prediv;
63 #define WRITE4(_clk, off, val) \
64 CLKDEV_WRITE_4(clknode_get_device(_clk), off, val)
65 #define READ4(_clk, off, val) \
66 CLKDEV_READ_4(clknode_get_device(_clk), off, val)
67 #define MODIFY4(_clk, off, clr, set ) \
68 CLKDEV_MODIFY_4(clknode_get_device(_clk), off, clr, set)
69 #define DEVICE_LOCK(_clk) \
70 CLKDEV_DEVICE_LOCK(clknode_get_device(_clk))
71 #define DEVICE_UNLOCK(_clk) \
72 CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk))
75 aw_clk_prediv_mux_init(struct clknode *clk, device_t dev)
77 struct aw_clk_prediv_mux_sc *sc;
80 sc = clknode_get_softc(clk);
83 READ4(clk, sc->offset, &val);
86 /* Init the current parent */
87 val = (val & sc->mux_mask) >> sc->mux_shift;
88 clknode_init_parent_idx(clk, val);
94 aw_clk_prediv_mux_set_mux(struct clknode *clk, int index)
96 struct aw_clk_prediv_mux_sc *sc;
99 sc = clknode_get_softc(clk);
102 READ4(clk, sc->offset, &val);
103 val &= ~sc->mux_mask;
104 val |= index << sc->mux_shift;
105 WRITE4(clk, sc->offset, val);
112 aw_clk_prediv_mux_recalc(struct clknode *clk, uint64_t *freq)
114 struct aw_clk_prediv_mux_sc *sc;
115 uint32_t val, div, prediv;
117 sc = clknode_get_softc(clk);
120 READ4(clk, sc->offset, &val);
123 div = aw_clk_get_factor(val, &sc->div);
124 prediv = aw_clk_get_factor(val, &sc->prediv);
126 *freq = *freq / prediv / div;
130 static clknode_method_t aw_prediv_mux_clknode_methods[] = {
131 /* Device interface */
132 CLKNODEMETHOD(clknode_init, aw_clk_prediv_mux_init),
133 CLKNODEMETHOD(clknode_set_mux, aw_clk_prediv_mux_set_mux),
134 CLKNODEMETHOD(clknode_recalc_freq, aw_clk_prediv_mux_recalc),
138 DEFINE_CLASS_1(aw_prediv_mux_clknode, aw_prediv_mux_clknode_class,
139 aw_prediv_mux_clknode_methods, sizeof(struct aw_clk_prediv_mux_sc),
143 aw_clk_prediv_mux_register(struct clkdom *clkdom, struct aw_clk_prediv_mux_def *clkdef)
146 struct aw_clk_prediv_mux_sc *sc;
148 clk = clknode_create(clkdom, &aw_prediv_mux_clknode_class, &clkdef->clkdef);
152 sc = clknode_get_softc(clk);
154 sc->offset = clkdef->offset;
156 sc->mux_shift = clkdef->mux_shift;
157 sc->mux_mask = ((1 << clkdef->mux_width) - 1) << sc->mux_shift;
159 sc->div.shift = clkdef->div.shift;
160 sc->div.mask = ((1 << clkdef->div.width) - 1) << sc->div.shift;
161 sc->div.value = clkdef->div.value;
162 sc->div.cond_shift = clkdef->div.cond_shift;
163 sc->div.cond_mask = ((1 << clkdef->div.cond_width) - 1) << sc->div.shift;
164 sc->div.cond_value = clkdef->div.cond_value;
165 sc->div.flags = clkdef->div.flags;
167 sc->prediv.shift = clkdef->prediv.shift;
168 sc->prediv.mask = ((1 << clkdef->prediv.width) - 1) << sc->prediv.shift;
169 sc->prediv.value = clkdef->prediv.value;
170 sc->prediv.cond_shift = clkdef->prediv.cond_shift;
171 if (clkdef->prediv.cond_width != 0)
172 sc->prediv.cond_mask = ((1 << clkdef->prediv.cond_width) - 1) << sc->prediv.shift;
174 sc->prediv.cond_mask = clkdef->prediv.cond_mask;
175 sc->prediv.cond_value = clkdef->prediv.cond_value;
176 sc->prediv.flags = clkdef->prediv.flags;
178 sc->flags = clkdef->flags;
180 clknode_register(clkdom, clk);