167 lines
4.8 KiB
C
167 lines
4.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2021 Semihalf.
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.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/mutex.h>
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#include <sys/rman.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.h>
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#include <dev/extres/clk/clk_div.h>
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#include <dev/extres/clk/clk_fixed.h>
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#include <dev/extres/clk/clk_gate.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 "clkdev_if.h"
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#include "periph.h"
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#define PARENT_CNT 2
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#define TBG_A_S_OFW_INDEX 0
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/*
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* Register chain: fixed (freq/2) -> mux (choose fixed or parent frequency) ->
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* gate (enable or disable clock).
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*/
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int
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a37x0_periph_register_mux_gate(struct clkdom *clkdom,
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struct a37x0_periph_clknode_def *device_def)
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{
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const char *parent_names[PARENT_CNT];
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struct clk_fixed_def fixed;
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struct clk_gate_def *gate;
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struct clk_mux_def *mux;
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int error, dev_id;
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dev_id = device_def->common_def.device_id;
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mux = &device_def->clk_def.mux_gate.mux;
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gate = &device_def->clk_def.mux_gate.gate;
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fixed = device_def->clk_def.fixed.fixed;
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fixed.clkdef.id = A37x0_INTERNAL_CLK_ID(dev_id, FIXED1_POS);
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fixed.clkdef.parent_names = &device_def->common_def.pname;
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fixed.clkdef.parent_cnt = 1;
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fixed.clkdef.flags = 0x0;
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fixed.mult = 1;
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fixed.div = 2;
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fixed.freq = 0;
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error = clknode_fixed_register(clkdom, &fixed);
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if (error)
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goto fail;
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parent_names[0] = device_def->common_def.pname;
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parent_names[1] = fixed.clkdef.name;
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a37x0_periph_set_props(&mux->clkdef, parent_names, PARENT_CNT);
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error = a37x0_periph_create_mux(clkdom, mux,
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A37x0_INTERNAL_CLK_ID(dev_id, MUX_POS));
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if (error)
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goto fail;
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a37x0_periph_set_props(&gate->clkdef, &mux->clkdef.name, 1);
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error = a37x0_periph_create_gate(clkdom, gate,
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dev_id);
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if (error)
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goto fail;
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fail:
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return (error);
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}
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/*
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* Register chain: fixed1 (freq/2) -> mux (fixed1 or TBG-A-S frequency) ->
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* gate -> fixed2 (freq/2).
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*/
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int
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a37x0_periph_register_mux_gate_fixed(struct clkdom * clkdom,
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struct a37x0_periph_clknode_def *device_def)
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{
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struct clk_fixed_def *fixed1, *fixed2;
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const char *parent_names[PARENT_CNT];
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struct clk_gate_def *gate;
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struct clk_mux_def *mux;
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int error, dev_id;
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dev_id = device_def->common_def.device_id;
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mux = &device_def->clk_def.mux_gate_fixed.mux;
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gate = &device_def->clk_def.mux_gate_fixed.gate;
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fixed1 = &device_def->clk_def.mux_gate_fixed.fixed1;
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fixed2 = &device_def->clk_def.mux_gate_fixed.fixed2;
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fixed1->clkdef.parent_names = &device_def->common_def.pname;
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fixed1->clkdef.id = A37x0_INTERNAL_CLK_ID(dev_id, FIXED1_POS);
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fixed1->clkdef.flags = 0x0;
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fixed1->mult = 1;
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fixed1->div = 2;
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fixed1->freq = 0;
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error = clknode_fixed_register(clkdom, fixed1);
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if (error)
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goto fail;
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parent_names[0] = device_def->common_def.tbgs[TBG_A_S_OFW_INDEX];
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parent_names[1] = fixed1->clkdef.name;
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a37x0_periph_set_props(&mux->clkdef, parent_names, PARENT_CNT);
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error = a37x0_periph_create_mux(clkdom, mux,
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A37x0_INTERNAL_CLK_ID(dev_id, MUX_POS));
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if (error)
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goto fail;
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a37x0_periph_set_props(&gate->clkdef, &mux->clkdef.name, 1);
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error = a37x0_periph_create_gate(clkdom, gate,
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A37x0_INTERNAL_CLK_ID(dev_id, GATE_POS));
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if (error)
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goto fail;
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fixed2->clkdef.parent_names = &gate->clkdef.name;
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fixed2->clkdef.parent_cnt = 1;
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fixed2->clkdef.id = dev_id;
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error = clknode_fixed_register(clkdom, fixed2);
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if (error)
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goto fail;
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fail:
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return (error);
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}
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