1/*- 2 * Copyright (c) 2017 Emmanuel Vadot <manu@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 ``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 * $FreeBSD$ 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/bus.h> 35 36#include <dev/extres/clk/clk.h> 37 38#include <arm/allwinner/clkng/aw_clk.h> 39#include <arm/allwinner/clkng/aw_clk_prediv_mux.h> 40 41#include "clkdev_if.h" 42 43/* 44 * clknode for clocks matching the formula : 45 * 46 * clk = clkin / prediv / div 47 * 48 * and where prediv is conditional 49 * 50 */ 51 52struct aw_clk_prediv_mux_sc { 53 uint32_t offset; 54 55 uint32_t mux_shift; 56 uint32_t mux_mask; 57 58 struct aw_clk_factor div; 59 struct aw_clk_factor prediv; 60 61 uint32_t flags; 62}; 63 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)) 74 75static int 76aw_clk_prediv_mux_init(struct clknode *clk, device_t dev) 77{ 78 struct aw_clk_prediv_mux_sc *sc; 79 uint32_t val; 80 81 sc = clknode_get_softc(clk); 82 83 DEVICE_LOCK(clk); 84 READ4(clk, sc->offset, &val); 85 DEVICE_UNLOCK(clk); 86 87 /* Init the current parent */ 88 val = (val & sc->mux_mask) >> sc->mux_shift; 89 clknode_init_parent_idx(clk, val); 90 91 return (0); 92} 93 94static int 95aw_clk_prediv_mux_set_mux(struct clknode *clk, int index) 96{ 97 struct aw_clk_prediv_mux_sc *sc; 98 uint32_t val; 99 100 sc = clknode_get_softc(clk); 101 102 DEVICE_LOCK(clk); 103 READ4(clk, sc->offset, &val); 104 val &= ~sc->mux_mask; 105 val |= index << sc->mux_shift; 106 WRITE4(clk, sc->offset, val); 107 DEVICE_UNLOCK(clk); 108 109 return (0); 110} 111 112static int 113aw_clk_prediv_mux_recalc(struct clknode *clk, uint64_t *freq) 114{ 115 struct aw_clk_prediv_mux_sc *sc; 116 uint32_t val, div, prediv; 117 118 sc = clknode_get_softc(clk); 119 120 DEVICE_LOCK(clk); 121 READ4(clk, sc->offset, &val); 122 DEVICE_UNLOCK(clk); 123 124 div = aw_clk_get_factor(val, &sc->div); 125 prediv = aw_clk_get_factor(val, &sc->prediv); 126 127 *freq = *freq / prediv / div; 128 return (0); 129} 130 131static 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), 136 CLKNODEMETHOD_END 137}; 138 139DEFINE_CLASS_1(aw_prediv_mux_clknode, aw_prediv_mux_clknode_class, 140 aw_prediv_mux_clknode_methods, sizeof(struct aw_clk_prediv_mux_sc), 141 clknode_class); 142 143int 144aw_clk_prediv_mux_register(struct clkdom *clkdom, struct aw_clk_prediv_mux_def *clkdef) 145{ 146 struct clknode *clk; 147 struct aw_clk_prediv_mux_sc *sc; 148 149 clk = clknode_create(clkdom, &aw_prediv_mux_clknode_class, &clkdef->clkdef); 150 if (clk == NULL) 151 return (1); 152 153 sc = clknode_get_softc(clk); 154 155 sc->offset = clkdef->offset; 156 157 sc->mux_shift = clkdef->mux_shift; 158 sc->mux_mask = ((1 << clkdef->mux_width) - 1) << sc->mux_shift; 159 160 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; 167 168 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; 174 else 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; 178 179 sc->flags = clkdef->flags; 180 181 clknode_register(clkdom, clk); 182 183 return (0); 184} 185