clk.h revision 308324
1/*- 2 * Copyright 2016 Michal Meloun <mmel@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 * $FreeBSD: stable/11/sys/dev/extres/clk/clk.h 308324 2016-11-05 04:17:32Z mmel $ 27 */ 28 29#ifndef _DEV_EXTRES_CLK_H_ 30#define _DEV_EXTRES_CLK_H_ 31#include "opt_platform.h" 32 33#include <sys/kobj.h> 34#ifdef FDT 35#include <dev/ofw/ofw_bus.h> 36#endif 37#include "clknode_if.h" 38 39#define CLKNODE_IDX_NONE -1 /* Not-selected index */ 40 41/* clknode flags. */ 42#define CLK_NODE_STATIC_STRINGS 0x00000001 /* Static name strings */ 43#define CLK_NODE_GLITCH_FREE 0x00000002 /* Freq can change w/o stop */ 44#define CLK_NODE_CANNOT_STOP 0x00000004 /* Clock cannot be disabled */ 45 46/* Flags passed to clk_set_freq() and clknode_set_freq(). */ 47#define CLK_SET_ROUND_UP 0x00000001 48#define CLK_SET_ROUND_DOWN 0x00000002 49#define CLK_SET_USER_MASK 0x0000FFFF 50#define CLK_SET_DRYRUN 0x00010000 51 52typedef struct clk *clk_t; 53 54/* Initialization parameters for clocknode creation. */ 55struct clknode_init_def { 56 const char *name; 57 intptr_t id; 58 const char **parent_names; 59 int parent_cnt; 60 int flags; 61}; 62 63/* 64 * Shorthands for constructing method tables. 65 */ 66#define CLKNODEMETHOD KOBJMETHOD 67#define CLKNODEMETHOD_END KOBJMETHOD_END 68#define clknode_method_t kobj_method_t 69#define clknode_class_t kobj_class_t 70DECLARE_CLASS(clknode_class); 71 72/* 73 * Clock domain functions. 74 */ 75struct clkdom *clkdom_create(device_t dev); 76int clkdom_finit(struct clkdom *clkdom); 77void clkdom_dump(struct clkdom * clkdom); 78void clkdom_unlock(struct clkdom *clkdom); 79void clkdom_xlock(struct clkdom *clkdom); 80 81/* 82 * Clock providers interface. 83 */ 84struct clkdom *clkdom_get_by_dev(const device_t dev); 85 86struct clknode *clknode_create(struct clkdom *clkdom, 87 clknode_class_t clknode_class, const struct clknode_init_def *def); 88struct clknode *clknode_register(struct clkdom *cldom, struct clknode *clk); 89#ifdef FDT 90typedef int clknode_ofw_mapper_func(struct clkdom *clkdom, uint32_t ncells, 91 phandle_t *cells, struct clknode **clk); 92void clkdom_set_ofw_mapper(struct clkdom *clkdom, clknode_ofw_mapper_func *cmp); 93#endif 94 95void clknode_init_parent_idx(struct clknode *clknode, int idx); 96int clknode_set_parent_by_idx(struct clknode *clk, int idx); 97int clknode_set_parent_by_name(struct clknode *clk, const char *name); 98const char *clknode_get_name(struct clknode *clk); 99const char **clknode_get_parent_names(struct clknode *clk); 100int clknode_get_parents_num(struct clknode *clk); 101int clknode_get_parent_idx(struct clknode *clk); 102struct clknode *clknode_get_parent(struct clknode *clk); 103int clknode_get_flags(struct clknode *clk); 104void *clknode_get_softc(struct clknode *clk); 105device_t clknode_get_device(struct clknode *clk); 106struct clknode *clknode_find_by_name(const char *name); 107struct clknode *clknode_find_by_id(struct clkdom *clkdom, intptr_t id); 108int clknode_get_freq(struct clknode *clknode, uint64_t *freq); 109int clknode_set_freq(struct clknode *clknode, uint64_t freq, int flags, 110 int enablecnt); 111int clknode_enable(struct clknode *clknode); 112int clknode_disable(struct clknode *clknode); 113int clknode_stop(struct clknode *clknode, int depth); 114 115/* 116 * Clock consumers interface. 117 */ 118int clk_get_by_name(device_t dev, const char *name, clk_t *clk); 119int clk_get_by_id(device_t dev, struct clkdom *clkdom, intptr_t id, clk_t *clk); 120int clk_release(clk_t clk); 121int clk_get_freq(clk_t clk, uint64_t *freq); 122int clk_set_freq(clk_t clk, uint64_t freq, int flags); 123int clk_test_freq(clk_t clk, uint64_t freq, int flags); 124int clk_enable(clk_t clk); 125int clk_disable(clk_t clk); 126int clk_stop(clk_t clk); 127int clk_get_parent(clk_t clk, clk_t *parent); 128int clk_set_parent_by_clk(clk_t clk, clk_t parent); 129const char *clk_get_name(clk_t clk); 130 131#ifdef FDT 132int clk_get_by_ofw_index(device_t dev, phandle_t node, int idx, clk_t *clk); 133int clk_get_by_ofw_name(device_t dev, phandle_t node, const char *name, 134 clk_t *clk); 135int clk_parse_ofw_out_names(device_t dev, phandle_t node, 136 const char ***out_names, uint32_t **indices); 137int clk_parse_ofw_clk_name(device_t dev, phandle_t node, const char **name); 138#endif 139 140#endif /* _DEV_EXTRES_CLK_H_ */ 141