1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2021 Semihalf. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/bus.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/mutex.h> 36 #include <sys/rman.h> 37 #include <machine/bus.h> 38 39 #include <dev/fdt/simplebus.h> 40 41 #include <dev/extres/clk/clk.h> 42 #include <dev/extres/clk/clk_div.h> 43 #include <dev/extres/clk/clk_fixed.h> 44 #include <dev/extres/clk/clk_gate.h> 45 #include <dev/extres/clk/clk_mux.h> 46 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include "clkdev_if.h" 51 #include "periph.h" 52 53 #define PARENT_CNT 2 54 #define TBG_A_S_OFW_INDEX 0 55 56 /* 57 * Register chain: fixed (freq/2) -> mux (choose fixed or parent frequency) -> 58 * gate (enable or disable clock). 59 */ 60 61 int 62 a37x0_periph_register_mux_gate(struct clkdom *clkdom, 63 struct a37x0_periph_clknode_def *device_def) 64 { 65 const char *parent_names[PARENT_CNT]; 66 struct clk_fixed_def fixed; 67 struct clk_gate_def *gate; 68 struct clk_mux_def *mux; 69 const char *dev_name; 70 int error, dev_id; 71 72 dev_name = device_def->common_def.device_name; 73 dev_id = device_def->common_def.device_id; 74 mux = &device_def->clk_def.mux_gate.mux; 75 gate = &device_def->clk_def.mux_gate.gate; 76 fixed = device_def->clk_def.fixed.fixed; 77 78 fixed.clkdef.id = A37x0_INTERNAL_CLK_ID(dev_id, FIXED1_POS); 79 fixed.clkdef.parent_names = &device_def->common_def.pname; 80 fixed.clkdef.parent_cnt = 1; 81 fixed.clkdef.flags = 0x0; 82 fixed.mult = 1; 83 fixed.div = 2; 84 fixed.freq = 0; 85 86 error = clknode_fixed_register(clkdom, &fixed); 87 if (error) 88 goto fail; 89 90 parent_names[0] = device_def->common_def.pname; 91 parent_names[1] = fixed.clkdef.name; 92 93 a37x0_periph_set_props(&mux->clkdef, parent_names, PARENT_CNT); 94 error = a37x0_periph_create_mux(clkdom, mux, 95 A37x0_INTERNAL_CLK_ID(dev_id, MUX_POS)); 96 if (error) 97 goto fail; 98 99 a37x0_periph_set_props(&gate->clkdef, &mux->clkdef.name, 1); 100 error = a37x0_periph_create_gate(clkdom, gate, 101 dev_id); 102 if (error) 103 goto fail; 104 105 fail: 106 107 return (error); 108 } 109 110 /* 111 * Register chain: fixed1 (freq/2) -> mux (fixed1 or TBG-A-S frequency) -> 112 * gate -> fixed2 (freq/2). 113 */ 114 115 int 116 a37x0_periph_register_mux_gate_fixed(struct clkdom * clkdom, 117 struct a37x0_periph_clknode_def *device_def) 118 { 119 struct clk_fixed_def *fixed1, *fixed2; 120 const char *parent_names[PARENT_CNT]; 121 struct clk_gate_def *gate; 122 struct clk_mux_def *mux; 123 const char *dev_name; 124 int error, dev_id; 125 126 dev_name = device_def->common_def.device_name; 127 dev_id = device_def->common_def.device_id; 128 mux = &device_def->clk_def.mux_gate_fixed.mux; 129 gate = &device_def->clk_def.mux_gate_fixed.gate; 130 fixed1 = &device_def->clk_def.mux_gate_fixed.fixed1; 131 fixed2 = &device_def->clk_def.mux_gate_fixed.fixed2; 132 133 fixed1->clkdef.parent_names = &device_def->common_def.pname; 134 fixed1->clkdef.id = A37x0_INTERNAL_CLK_ID(dev_id, FIXED1_POS); 135 fixed1->clkdef.flags = 0x0; 136 fixed1->mult = 1; 137 fixed1->div = 2; 138 fixed1->freq = 0; 139 140 error = clknode_fixed_register(clkdom, fixed1); 141 if (error) 142 goto fail; 143 144 parent_names[0] = device_def->common_def.tbgs[TBG_A_S_OFW_INDEX]; 145 parent_names[1] = fixed1->clkdef.name; 146 147 a37x0_periph_set_props(&mux->clkdef, parent_names, PARENT_CNT); 148 error = a37x0_periph_create_mux(clkdom, mux, 149 A37x0_INTERNAL_CLK_ID(dev_id, MUX_POS)); 150 if (error) 151 goto fail; 152 153 a37x0_periph_set_props(&gate->clkdef, &mux->clkdef.name, 1); 154 error = a37x0_periph_create_gate(clkdom, gate, 155 A37x0_INTERNAL_CLK_ID(dev_id, GATE_POS)); 156 if (error) 157 goto fail; 158 159 fixed2->clkdef.parent_names = &gate->clkdef.name; 160 fixed2->clkdef.parent_cnt = 1; 161 fixed2->clkdef.id = dev_id; 162 163 error = clknode_fixed_register(clkdom, fixed2); 164 if (error) 165 goto fail; 166 167 fail: 168 169 return (error); 170 } 171