1 /*- 2 * Copyright (c) 2015-2016 Landon Fuller <landon@landonf.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 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/module.h> 37 38 #include <dev/bhnd/bhnd_ids.h> 39 #include <dev/bhnd/bhnd.h> 40 41 #include "bhndbvar.h" 42 43 /* 44 * bhnd(4) driver mix-in providing a shared common methods for 45 * bhnd devices attached via a bhndb bridge. 46 */ 47 48 static int 49 bhnd_bhndb_read_board_info(device_t dev, device_t child, 50 struct bhnd_board_info *info) 51 { 52 int error; 53 54 /* Initialize with NVRAM-derived values */ 55 if ((error = bhnd_bus_generic_read_board_info(dev, child, info))) 56 return (error); 57 58 /* Let the bridge fill in any additional data */ 59 return (BHNDB_POPULATE_BOARD_INFO(device_get_parent(dev), dev, info)); 60 } 61 62 static bhnd_attach_type 63 bhnd_bhndb_get_attach_type(device_t dev, device_t child) 64 { 65 /* It's safe to assume that a bridged device is always an adapter */ 66 return (BHND_ATTACH_ADAPTER); 67 } 68 69 70 static bool 71 bhnd_bhndb_is_hw_disabled(device_t dev, device_t child) 72 { 73 struct bhnd_core_info core = bhnd_get_core_info(child); 74 75 /* Delegate to parent bridge */ 76 return (BHNDB_IS_CORE_DISABLED(device_get_parent(dev), dev, &core)); 77 } 78 79 80 static device_t 81 bhnd_bhndb_find_hostb_device(device_t dev) 82 { 83 struct bhnd_core_info core; 84 struct bhnd_core_match md; 85 int error; 86 87 /* Ask the bridge for the hostb core info */ 88 if ((error = BHNDB_GET_HOSTB_CORE(device_get_parent(dev), dev, &core))) 89 return (NULL); 90 91 /* Find the corresponding bus device */ 92 md = bhnd_core_get_match_desc(&core); 93 return (bhnd_match_child(dev, &md)); 94 } 95 96 static int 97 bhnd_bhndb_assign_intr(device_t dev, device_t child, int rid) 98 { 99 /* Delegate to parent bridge */ 100 return (BHND_BUS_ASSIGN_INTR(device_get_parent(dev), child, rid)); 101 } 102 103 static bhnd_clksrc 104 bhnd_bhndb_pwrctl_get_clksrc(device_t dev, device_t child, 105 bhnd_clock clock) 106 { 107 /* Delegate to parent bridge */ 108 return (BHND_BUS_PWRCTL_GET_CLKSRC(device_get_parent(dev), child, 109 clock)); 110 } 111 112 static int 113 bhnd_bhndb_pwrctl_gate_clock(device_t dev, device_t child, 114 bhnd_clock clock) 115 { 116 /* Delegate to parent bridge */ 117 return (BHND_BUS_PWRCTL_GATE_CLOCK(device_get_parent(dev), child, 118 clock)); 119 } 120 121 static int 122 bhnd_bhndb_pwrctl_ungate_clock(device_t dev, device_t child, 123 bhnd_clock clock) 124 { 125 /* Delegate to parent bridge */ 126 return (BHND_BUS_PWRCTL_UNGATE_CLOCK(device_get_parent(dev), child, 127 clock)); 128 } 129 130 static device_method_t bhnd_bhndb_methods[] = { 131 /* BHND interface */ 132 DEVMETHOD(bhnd_bus_get_attach_type, bhnd_bhndb_get_attach_type), 133 DEVMETHOD(bhnd_bus_is_hw_disabled, bhnd_bhndb_is_hw_disabled), 134 DEVMETHOD(bhnd_bus_find_hostb_device, bhnd_bhndb_find_hostb_device), 135 DEVMETHOD(bhnd_bus_read_board_info, bhnd_bhndb_read_board_info), 136 DEVMETHOD(bhnd_bus_assign_intr, bhnd_bhndb_assign_intr), 137 138 DEVMETHOD(bhnd_bus_pwrctl_get_clksrc, bhnd_bhndb_pwrctl_get_clksrc), 139 DEVMETHOD(bhnd_bus_pwrctl_gate_clock, bhnd_bhndb_pwrctl_gate_clock), 140 DEVMETHOD(bhnd_bus_pwrctl_ungate_clock, bhnd_bhndb_pwrctl_ungate_clock), 141 142 DEVMETHOD_END 143 }; 144 145 DEFINE_CLASS_0(bhnd, bhnd_bhndb_driver, bhnd_bhndb_methods, 0); 146