bhnd_nexus.c revision 303975
1/*- 2 * Copyright (c) 2015-2016 Landon Fuller <landon@freebsd.org> 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 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 16 * NO WARRANTY 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 * 29 * $FreeBSD: releng/11.0/sys/dev/bhnd/bhnd_nexus.c 301971 2016-06-16 19:57:24Z landonf $ 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: releng/11.0/sys/dev/bhnd/bhnd_nexus.c 301971 2016-06-16 19:57:24Z landonf $"); 34 35 36/* 37 * bhnd(4) driver mix-in providing shared common methods for 38 * bhnd bus devices attached via a root nexus. 39 */ 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/bus.h> 44#include <sys/kernel.h> 45#include <sys/module.h> 46#include <sys/rman.h> 47#include <sys/malloc.h> 48 49#include <machine/bus.h> 50 51#include <dev/bhnd/bhnd_ids.h> 52#include <dev/bhnd/cores/chipc/chipcreg.h> 53 54#include "bhnd_nexusvar.h" 55 56static const struct resource_spec bhnd_nexus_res_spec[] = { 57 { SYS_RES_MEMORY, 0, RF_ACTIVE }, /* chipc registers */ 58 { -1, 0, 0 } 59}; 60 61/** 62 * Map ChipCommon's register block and read the chip identifier data. 63 * 64 * @param dev A bhnd_nexus device. 65 * @param chipid On success, will be populated with the chip identifier. 66 * @retval 0 success 67 * @retval non-zero An error occurred reading the chip identifier.. 68 */ 69int 70bhnd_nexus_read_chipid(device_t dev, struct bhnd_chipid *chipid) 71{ 72 struct resource_spec rspec[nitems(bhnd_nexus_res_spec)]; 73 int error; 74 75 memcpy(rspec, bhnd_nexus_res_spec, sizeof(rspec)); 76 error = bhnd_read_chipid(dev, rspec, 0, chipid); 77 if (error) 78 device_printf(dev, "error %d reading chip ID\n", error); 79 80 return (error); 81} 82 83static bool 84bhnd_nexus_is_hw_disabled(device_t dev, device_t child) 85{ 86 return false; 87} 88 89static bhnd_attach_type 90bhnd_nexus_get_attach_type(device_t dev, device_t child) 91{ 92 return (BHND_ATTACH_NATIVE); 93} 94 95static int 96bhnd_nexus_activate_resource(device_t dev, device_t child, int type, int rid, 97 struct bhnd_resource *r) 98{ 99 int error; 100 101 /* Always direct */ 102 if ((error = bus_activate_resource(child, type, rid, r->res))) 103 return (error); 104 105 r->direct = true; 106 return (0); 107} 108 109static int 110bhnd_nexus_deactivate_resource(device_t dev, device_t child, 111 int type, int rid, struct bhnd_resource *r) 112{ 113 int error; 114 115 /* Always direct */ 116 KASSERT(r->direct, ("indirect resource delegated to bhnd_nexus\n")); 117 118 if ((error = bus_deactivate_resource(child, type, rid, r->res))) 119 return (error); 120 121 r->direct = false; 122 return (0); 123} 124 125static device_method_t bhnd_nexus_methods[] = { 126 /* bhnd interface */ 127 DEVMETHOD(bhnd_bus_activate_resource, bhnd_nexus_activate_resource), 128 DEVMETHOD(bhnd_bus_deactivate_resource, bhnd_nexus_deactivate_resource), 129 DEVMETHOD(bhnd_bus_is_hw_disabled, bhnd_nexus_is_hw_disabled), 130 DEVMETHOD(bhnd_bus_get_attach_type, bhnd_nexus_get_attach_type), 131 132 DEVMETHOD_END 133}; 134 135DEFINE_CLASS_0(bhnd, bhnd_nexus_driver, bhnd_nexus_methods, 136 sizeof(struct bhnd_softc)); 137