1/*- 2 * Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca> 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 ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 21 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 22 * 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/arm/allwinner/clk/aw_codecclk.c 308324 2016-11-05 04:17:32Z mmel $ 27 */ 28 29/* 30 * Allwinner CODEC clock 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: stable/11/sys/arm/allwinner/clk/aw_codecclk.c 308324 2016-11-05 04:17:32Z mmel $"); 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/bus.h> 39#include <sys/rman.h> 40#include <sys/kernel.h> 41#include <sys/module.h> 42#include <machine/bus.h> 43 44#include <dev/ofw/ofw_bus.h> 45#include <dev/ofw/ofw_bus_subr.h> 46#include <dev/ofw/ofw_subr.h> 47 48#include <dev/extres/clk/clk_gate.h> 49#include <dev/extres/hwreset/hwreset.h> 50 51#include "clkdev_if.h" 52 53#define SCLK_GATING_SHIFT 31 54 55static struct ofw_compat_data compat_data[] = { 56 { "allwinner,sun4i-a10-codec-clk", 1 }, 57 { NULL, 0 } 58}; 59 60static int 61aw_codecclk_create(device_t dev, bus_addr_t paddr, struct clkdom *clkdom, 62 const char *pclkname, const char *clkname, int index) 63{ 64 const char *parent_names[1] = { pclkname }; 65 struct clk_gate_def def; 66 67 memset(&def, 0, sizeof(def)); 68 def.clkdef.id = index; 69 def.clkdef.name = clkname; 70 def.clkdef.parent_names = parent_names; 71 def.clkdef.parent_cnt = 1; 72 def.offset = paddr; 73 def.shift = SCLK_GATING_SHIFT; 74 def.mask = 1; 75 def.on_value = 1; 76 def.off_value = 0; 77 78 return (clknode_gate_register(clkdom, &def)); 79} 80 81static int 82aw_codecclk_probe(device_t dev) 83{ 84 if (!ofw_bus_status_okay(dev)) 85 return (ENXIO); 86 87 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 88 return (ENXIO); 89 90 device_set_desc(dev, "Allwinner CODEC Clock"); 91 return (BUS_PROBE_DEFAULT); 92} 93 94static int 95aw_codecclk_attach(device_t dev) 96{ 97 struct clkdom *clkdom; 98 const char **names; 99 int nout, error; 100 uint32_t *indices; 101 clk_t clk_parent; 102 bus_addr_t paddr; 103 bus_size_t psize; 104 phandle_t node; 105 106 node = ofw_bus_get_node(dev); 107 indices = NULL; 108 109 if (ofw_reg_to_paddr(node, 0, &paddr, &psize, NULL) != 0) { 110 device_printf(dev, "cannot parse 'reg' property\n"); 111 return (ENXIO); 112 } 113 114 clkdom = clkdom_create(dev); 115 116 nout = clk_parse_ofw_out_names(dev, node, &names, &indices); 117 if (nout != 1) { 118 device_printf(dev, "must have exactly one output clock\n"); 119 error = ENOENT; 120 goto fail; 121 } 122 123 error = clk_get_by_ofw_index(dev, 0, 0, &clk_parent); 124 if (error != 0) { 125 device_printf(dev, "cannot parse clock parent\n"); 126 return (ENXIO); 127 } 128 129 error = aw_codecclk_create(dev, paddr, clkdom, 130 clk_get_name(clk_parent), names[0], 1); 131 132 if (clkdom_finit(clkdom) != 0) { 133 device_printf(dev, "cannot finalize clkdom initialization\n"); 134 error = ENXIO; 135 goto fail; 136 } 137 138 if (bootverbose) 139 clkdom_dump(clkdom); 140 141 return (0); 142 143fail: 144 return (error); 145} 146 147static device_method_t aw_codecclk_methods[] = { 148 /* Device interface */ 149 DEVMETHOD(device_probe, aw_codecclk_probe), 150 DEVMETHOD(device_attach, aw_codecclk_attach), 151 152 DEVMETHOD_END 153}; 154 155static driver_t aw_codecclk_driver = { 156 "aw_codecclk", 157 aw_codecclk_methods, 158 0 159}; 160 161static devclass_t aw_codecclk_devclass; 162 163EARLY_DRIVER_MODULE(aw_codecclk, simplebus, aw_codecclk_driver, 164 aw_codecclk_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 165