1297627Sjmcneill/*- 2297627Sjmcneill * Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca> 3297627Sjmcneill * All rights reserved. 4297627Sjmcneill * 5297627Sjmcneill * Redistribution and use in source and binary forms, with or without 6297627Sjmcneill * modification, are permitted provided that the following conditions 7297627Sjmcneill * are met: 8297627Sjmcneill * 1. Redistributions of source code must retain the above copyright 9297627Sjmcneill * notice, this list of conditions and the following disclaimer. 10297627Sjmcneill * 2. Redistributions in binary form must reproduce the above copyright 11297627Sjmcneill * notice, this list of conditions and the following disclaimer in the 12297627Sjmcneill * documentation and/or other materials provided with the distribution. 13297627Sjmcneill * 14297627Sjmcneill * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15297627Sjmcneill * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16297627Sjmcneill * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17297627Sjmcneill * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18297627Sjmcneill * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19297627Sjmcneill * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20297627Sjmcneill * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 21297627Sjmcneill * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 22297627Sjmcneill * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23297627Sjmcneill * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24297627Sjmcneill * SUCH DAMAGE. 25297627Sjmcneill * 26297627Sjmcneill * $FreeBSD$ 27297627Sjmcneill */ 28297627Sjmcneill 29297627Sjmcneill/* 30297627Sjmcneill * Allwinner oscillator clock 31297627Sjmcneill */ 32297627Sjmcneill 33297627Sjmcneill#include <sys/cdefs.h> 34297627Sjmcneill__FBSDID("$FreeBSD$"); 35297627Sjmcneill 36297627Sjmcneill#include <sys/param.h> 37297627Sjmcneill#include <sys/systm.h> 38297627Sjmcneill#include <sys/bus.h> 39297627Sjmcneill#include <sys/rman.h> 40297627Sjmcneill#include <sys/kernel.h> 41297627Sjmcneill#include <sys/module.h> 42297627Sjmcneill 43297627Sjmcneill#include <dev/ofw/ofw_bus.h> 44297627Sjmcneill#include <dev/ofw/ofw_bus_subr.h> 45297627Sjmcneill 46297627Sjmcneill#include <dev/extres/clk/clk_fixed.h> 47297627Sjmcneill 48297627Sjmcneillstatic int 49297627Sjmcneillaw_oscclk_probe(device_t dev) 50297627Sjmcneill{ 51297627Sjmcneill if (!ofw_bus_status_okay(dev)) 52297627Sjmcneill return (ENXIO); 53297627Sjmcneill 54297627Sjmcneill if (!ofw_bus_is_compatible(dev, "allwinner,sun4i-a10-osc-clk")) 55297627Sjmcneill return (ENXIO); 56297627Sjmcneill 57297627Sjmcneill device_set_desc(dev, "Allwinner Oscillator Clock"); 58297627Sjmcneill return (BUS_PROBE_DEFAULT); 59297627Sjmcneill} 60297627Sjmcneill 61297627Sjmcneillstatic int 62297627Sjmcneillaw_oscclk_attach(device_t dev) 63297627Sjmcneill{ 64297627Sjmcneill struct clk_fixed_def def; 65297627Sjmcneill struct clkdom *clkdom; 66297627Sjmcneill phandle_t node; 67297627Sjmcneill uint32_t freq; 68297627Sjmcneill int error; 69297627Sjmcneill 70297627Sjmcneill node = ofw_bus_get_node(dev); 71297627Sjmcneill 72297627Sjmcneill if (OF_getencprop(node, "clock-frequency", &freq, sizeof(freq)) <= 0) { 73297627Sjmcneill device_printf(dev, "missing clock-frequency property\n"); 74297627Sjmcneill error = ENXIO; 75297627Sjmcneill goto fail; 76297627Sjmcneill } 77297627Sjmcneill 78297627Sjmcneill clkdom = clkdom_create(dev); 79297627Sjmcneill 80297627Sjmcneill memset(&def, 0, sizeof(def)); 81297627Sjmcneill def.clkdef.id = 1; 82297627Sjmcneill def.freq = freq; 83297627Sjmcneill error = clk_parse_ofw_clk_name(dev, node, &def.clkdef.name); 84297627Sjmcneill if (error != 0) { 85297627Sjmcneill device_printf(dev, "cannot parse clock name\n"); 86297627Sjmcneill error = ENXIO; 87297627Sjmcneill goto fail; 88297627Sjmcneill } 89297627Sjmcneill 90297627Sjmcneill error = clknode_fixed_register(clkdom, &def); 91297627Sjmcneill if (error != 0) { 92297627Sjmcneill device_printf(dev, "cannot register fixed clock\n"); 93297627Sjmcneill error = ENXIO; 94297627Sjmcneill goto fail; 95297627Sjmcneill } 96297627Sjmcneill 97297627Sjmcneill if (clkdom_finit(clkdom) != 0) { 98297627Sjmcneill device_printf(dev, "cannot finalize clkdom initialization\n"); 99297627Sjmcneill error = ENXIO; 100297627Sjmcneill goto fail; 101297627Sjmcneill } 102297627Sjmcneill 103297627Sjmcneill if (bootverbose) 104297627Sjmcneill clkdom_dump(clkdom); 105297627Sjmcneill 106299703Sgonzo OF_prop_free(__DECONST(char *, def.clkdef.name)); 107297627Sjmcneill 108297627Sjmcneill return (0); 109297627Sjmcneill 110297627Sjmcneillfail: 111299703Sgonzo OF_prop_free(__DECONST(char *, def.clkdef.name)); 112297627Sjmcneill return (error); 113297627Sjmcneill} 114297627Sjmcneill 115297627Sjmcneillstatic device_method_t aw_oscclk_methods[] = { 116297627Sjmcneill /* Device interface */ 117297627Sjmcneill DEVMETHOD(device_probe, aw_oscclk_probe), 118297627Sjmcneill DEVMETHOD(device_attach, aw_oscclk_attach), 119297627Sjmcneill 120297627Sjmcneill DEVMETHOD_END 121297627Sjmcneill}; 122297627Sjmcneill 123297627Sjmcneillstatic driver_t aw_oscclk_driver = { 124297627Sjmcneill "aw_oscclk", 125297627Sjmcneill aw_oscclk_methods, 126297627Sjmcneill 0, 127297627Sjmcneill}; 128297627Sjmcneill 129297627Sjmcneillstatic devclass_t aw_oscclk_devclass; 130297627Sjmcneill 131297627SjmcneillEARLY_DRIVER_MODULE(aw_oscclk, simplebus, aw_oscclk_driver, 132297627Sjmcneill aw_oscclk_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 133