/*- * Copyright 2016 Michal Meloun * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _DEV_CLK_H_ #define _DEV_CLK_H_ #include "opt_platform.h" #include #ifdef FDT #include #endif #include "clknode_if.h" #define CLKNODE_IDX_NONE -1 /* Not-selected index */ /* clknode flags. */ #define CLK_NODE_STATIC_STRINGS 0x00000001 /* Static name strings */ #define CLK_NODE_GLITCH_FREE 0x00000002 /* Freq can change w/o stop */ #define CLK_NODE_CANNOT_STOP 0x00000004 /* Cannot be disabled */ #define CLK_NODE_LINKED 0x00000008 /* Is linked clock */ #define CLK_NODE_REGISTERED 0x00000020 /* Is already registered */ /* Flags passed to clk_set_freq() and clknode_set_freq(). */ #define CLK_SET_ROUND(x) ((x) & (CLK_SET_ROUND_UP | CLK_SET_ROUND_DOWN)) #define CLK_SET_ROUND_EXACT 0 #define CLK_SET_ROUND_UP 0x00000001 #define CLK_SET_ROUND_DOWN 0x00000002 #define CLK_SET_ROUND_MULTIPLE 0x00000004 #define CLK_SET_ROUND_ANY (CLK_SET_ROUND_UP | CLK_SET_ROUND_DOWN) #define CLK_SET_USER_MASK 0x0000FFFF #define CLK_SET_DRYRUN 0x00010000 typedef struct clk *clk_t; /* Initialization parameters for clocknode creation. */ struct clknode_init_def { const char *name; intptr_t id; const char **parent_names; int parent_cnt; int flags; }; /* * Shorthands for constructing method tables. */ #define CLKNODEMETHOD KOBJMETHOD #define CLKNODEMETHOD_END KOBJMETHOD_END #define clknode_method_t kobj_method_t #define clknode_class_t kobj_class_t DECLARE_CLASS(clknode_class); /* * Clock domain functions. */ struct clkdom *clkdom_create(device_t dev); int clkdom_finit(struct clkdom *clkdom); void clkdom_dump(struct clkdom * clkdom); void clkdom_unlock(struct clkdom *clkdom); void clkdom_xlock(struct clkdom *clkdom); /* * Clock providers interface. */ struct clkdom *clkdom_get_by_dev(const device_t dev); struct clknode *clknode_create(struct clkdom *clkdom, clknode_class_t clknode_class, const struct clknode_init_def *def); struct clknode *clknode_register(struct clkdom *cldom, struct clknode *clk); #ifdef FDT typedef int clknode_ofw_mapper_func(struct clkdom *clkdom, uint32_t ncells, phandle_t *cells, struct clknode **clk); void clkdom_set_ofw_mapper(struct clkdom *clkdom, clknode_ofw_mapper_func *cmp); #endif void clknode_init_parent_idx(struct clknode *clknode, int idx); int clknode_set_parent_by_idx(struct clknode *clk, int idx); int clknode_set_parent_by_name(struct clknode *clk, const char *name); const char *clknode_get_name(struct clknode *clk); const char **clknode_get_parent_names(struct clknode *clk); int clknode_get_parents_num(struct clknode *clk); int clknode_get_parent_idx(struct clknode *clk); struct clknode *clknode_get_parent(struct clknode *clk); int clknode_get_flags(struct clknode *clk); void *clknode_get_softc(struct clknode *clk); device_t clknode_get_device(struct clknode *clk); struct clknode *clknode_find_by_name(const char *name); struct clknode *clknode_find_by_id(struct clkdom *clkdom, intptr_t id); int clknode_get_freq(struct clknode *clknode, uint64_t *freq); int clknode_set_freq(struct clknode *clknode, uint64_t freq, int flags, int enablecnt); int clknode_test_freq(struct clknode *clknode, uint64_t freq, int flags, int enablecnt, uint64_t *out_freq); int clknode_enable(struct clknode *clknode); int clknode_disable(struct clknode *clknode); int clknode_stop(struct clknode *clknode, int depth); /* * Clock consumers interface. */ int clk_get_by_name(device_t dev, const char *name, clk_t *clk); int clk_get_by_id(device_t dev, struct clkdom *clkdom, intptr_t id, clk_t *clk); int clk_release(clk_t clk); int clk_get_freq(clk_t clk, uint64_t *freq); int clk_set_freq(clk_t clk, uint64_t freq, int flags); int clk_test_freq(clk_t clk, uint64_t freq, int flags); int clk_enable(clk_t clk); int clk_disable(clk_t clk); int clk_stop(clk_t clk); int clk_get_parent(clk_t clk, clk_t *parent); int clk_set_parent_by_clk(clk_t clk, clk_t parent); const char *clk_get_name(clk_t clk); static inline uint64_t clk_freq_diff(uint64_t x, uint64_t y) { return (x >= y ? x - y : y - x); } #ifdef FDT int clk_set_assigned(device_t dev, phandle_t node); int clk_get_by_ofw_index(device_t dev, phandle_t node, int idx, clk_t *clk); int clk_get_by_ofw_index_prop(device_t dev, phandle_t cnode, const char *prop, int idx, clk_t *clk); int clk_get_by_ofw_name(device_t dev, phandle_t node, const char *name, clk_t *clk); int clk_parse_ofw_out_names(device_t dev, phandle_t node, const char ***out_names, uint32_t **indices); int clk_parse_ofw_clk_name(device_t dev, phandle_t node, const char **name); #endif #endif /* _DEV_CLK_H_ */