mirror of https://github.com/F-Stack/f-stack.git
153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2020 Oskar Holmlund <oskar.holmlund@ohdata.se>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/libkern.h>
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#include <sys/types.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <dev/fdt/simplebus.h>
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#include <dev/extres/clk/clk_mux.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include "clock_common.h"
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#if 0
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#define DPRINTF(dev, msg...) device_printf(dev, msg)
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#else
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#define DPRINTF(dev, msg...)
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#endif
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void
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read_clock_cells(device_t dev, struct clock_cell_info *clk) {
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ssize_t numbytes_clocks;
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phandle_t node, parent, *cells;
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int index, ncells, rv;
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node = ofw_bus_get_node(dev);
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/* Get names of parent clocks */
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numbytes_clocks = OF_getproplen(node, "clocks");
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clk->num_clock_cells = numbytes_clocks / sizeof(cell_t);
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/* Allocate space and get clock cells content */
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/* clock_cells / clock_cells_ncells will be freed in
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* find_parent_clock_names()
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*/
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clk->clock_cells = malloc(numbytes_clocks, M_DEVBUF, M_WAITOK|M_ZERO);
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clk->clock_cells_ncells = malloc(clk->num_clock_cells*sizeof(uint8_t),
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M_DEVBUF, M_WAITOK|M_ZERO);
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OF_getencprop(node, "clocks", clk->clock_cells, numbytes_clocks);
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/* Count number of clocks */
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clk->num_real_clocks = 0;
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for (index = 0; index < clk->num_clock_cells; index++) {
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rv = ofw_bus_parse_xref_list_alloc(node, "clocks", "#clock-cells",
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clk->num_real_clocks, &parent, &ncells, &cells);
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if (rv != 0)
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continue;
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if (cells != NULL)
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OF_prop_free(cells);
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clk->clock_cells_ncells[index] = ncells;
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index += ncells;
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clk->num_real_clocks++;
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}
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}
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int
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find_parent_clock_names(device_t dev, struct clock_cell_info *clk, struct clknode_init_def *def) {
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int index, clock_index, err;
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bool found_all = true;
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clk_t parent;
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/* Figure out names */
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for (index = 0, clock_index = 0; index < clk->num_clock_cells; index++) {
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/* Get name of parent clock */
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err = clk_get_by_ofw_index(dev, 0, clock_index, &parent);
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if (err != 0) {
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clock_index++;
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found_all = false;
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DPRINTF(dev, "Failed to find clock_cells[%d]=0x%x\n",
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index, clk->clock_cells[index]);
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index += clk->clock_cells_ncells[index];
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continue;
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}
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def->parent_names[clock_index] = clk_get_name(parent);
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clk_release(parent);
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DPRINTF(dev, "Found parent clock[%d/%d]: %s\n",
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clock_index, clk->num_real_clocks,
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def->parent_names[clock_index]);
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clock_index++;
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index += clk->clock_cells_ncells[index];
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}
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if (!found_all) {
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return 1;
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}
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free(clk->clock_cells, M_DEVBUF);
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free(clk->clock_cells_ncells, M_DEVBUF);
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return 0;
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}
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void
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create_clkdef(device_t dev, struct clock_cell_info *clk, struct clknode_init_def *def) {
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def->id = 1;
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clk_parse_ofw_clk_name(dev, ofw_bus_get_node(dev), &def->name);
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DPRINTF(dev, "node name: %s\n", def->name);
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def->parent_cnt = clk->num_real_clocks;
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def->parent_names = malloc(clk->num_real_clocks*sizeof(char *),
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M_OFWPROP, M_WAITOK);
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}
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void
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free_clkdef(struct clknode_init_def *def) {
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OF_prop_free(__DECONST(char *, def->name));
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OF_prop_free(def->parent_names);
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}
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