1 /*- 2 * Copyright (c) 2015-2016 Landon Fuller <landon@landonf.org> 3 * Copyright (c) 2017 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * Portions of this software were developed by Landon Fuller 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer, 14 * without modification. 15 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 16 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 17 * redistribution must be conditioned upon including a substantially 18 * similar Disclaimer requirement for further binary redistribution. 19 * 20 * NO WARRANTY 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 24 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 25 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 26 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 29 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 31 * THE POSSIBILITY OF SUCH DAMAGES. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/kernel.h> 39 #include <sys/bus.h> 40 #include <sys/module.h> 41 42 #include <dev/bhnd/bhnd_ids.h> 43 #include <dev/bhnd/bhnd.h> 44 45 #include "bhnd_pwrctl_hostb_if.h" 46 47 #include "bhndbvar.h" 48 49 /* 50 * bhnd(4) driver mix-in providing a shared common methods for 51 * bhnd devices attached via a bhndb bridge. 52 */ 53 54 static int 55 bhnd_bhndb_read_board_info(device_t dev, device_t child, 56 struct bhnd_board_info *info) 57 { 58 int error; 59 60 /* Initialize with NVRAM-derived values */ 61 if ((error = bhnd_bus_generic_read_board_info(dev, child, info))) 62 return (error); 63 64 /* Let the bridge fill in any additional data */ 65 return (BHNDB_POPULATE_BOARD_INFO(device_get_parent(dev), dev, info)); 66 } 67 68 static bhnd_attach_type 69 bhnd_bhndb_get_attach_type(device_t dev, device_t child) 70 { 71 /* It's safe to assume that a bridged device is always an adapter */ 72 return (BHND_ATTACH_ADAPTER); 73 } 74 75 76 static bool 77 bhnd_bhndb_is_hw_disabled(device_t dev, device_t child) 78 { 79 struct bhnd_core_info core = bhnd_get_core_info(child); 80 81 /* Delegate to parent bridge */ 82 return (BHNDB_IS_CORE_DISABLED(device_get_parent(dev), dev, &core)); 83 } 84 85 86 static device_t 87 bhnd_bhndb_find_hostb_device(device_t dev) 88 { 89 struct bhnd_core_info core; 90 struct bhnd_core_match md; 91 int error; 92 93 /* Ask the bridge for the hostb core info */ 94 if ((error = BHNDB_GET_HOSTB_CORE(device_get_parent(dev), dev, &core))) 95 return (NULL); 96 97 /* Find the corresponding bus device */ 98 md = bhnd_core_get_match_desc(&core); 99 return (bhnd_bus_match_child(dev, &md)); 100 } 101 102 static int 103 bhnd_bhndb_map_intr(device_t dev, device_t child, u_int intr, rman_res_t *irq) 104 { 105 /* Delegate to parent bridge */ 106 return (BHND_BUS_MAP_INTR(device_get_parent(dev), child, intr, irq)); 107 } 108 109 static void 110 bhnd_bhndb_unmap_intr(device_t dev, device_t child, rman_res_t irq) 111 { 112 /* Delegate to parent bridge */ 113 return (BHND_BUS_UNMAP_INTR(device_get_parent(dev), child, irq)); 114 } 115 116 static bhnd_clksrc 117 bhnd_bhndb_pwrctl_get_clksrc(device_t dev, device_t child, 118 bhnd_clock clock) 119 { 120 /* Delegate to parent bridge */ 121 return (BHND_PWRCTL_HOSTB_GET_CLKSRC(device_get_parent(dev), child, 122 clock)); 123 } 124 125 static int 126 bhnd_bhndb_pwrctl_gate_clock(device_t dev, device_t child, 127 bhnd_clock clock) 128 { 129 /* Delegate to parent bridge */ 130 return (BHND_PWRCTL_HOSTB_GATE_CLOCK(device_get_parent(dev), child, 131 clock)); 132 } 133 134 static int 135 bhnd_bhndb_pwrctl_ungate_clock(device_t dev, device_t child, 136 bhnd_clock clock) 137 { 138 /* Delegate to parent bridge */ 139 return (BHND_PWRCTL_HOSTB_UNGATE_CLOCK(device_get_parent(dev), child, 140 clock)); 141 } 142 143 static int 144 bhnd_bhndb_setup_intr(device_t dev, device_t child, struct resource *irq, 145 int flags, driver_filter_t *filter, driver_intr_t *intr, void *arg, 146 void **cookiep) 147 { 148 device_t core, bus; 149 int error; 150 151 /* Find the actual bus-attached child core */ 152 core = child; 153 while ((bus = device_get_parent(core)) != NULL) { 154 if (bus == dev) 155 break; 156 157 core = bus; 158 } 159 160 KASSERT(core != NULL, ("%s is not a child of %s", 161 device_get_nameunit(child), device_get_nameunit(dev))); 162 163 /* Ask our bridge to enable interrupt routing for the child core */ 164 error = BHNDB_ROUTE_INTERRUPTS(device_get_parent(dev), core); 165 if (error) 166 return (error); 167 168 /* Delegate actual interrupt setup to the default bhnd bus 169 * implementation */ 170 return (bhnd_generic_setup_intr(dev, child, irq, flags, filter, intr, 171 arg, cookiep)); 172 } 173 174 static device_method_t bhnd_bhndb_methods[] = { 175 /* Bus interface */ 176 DEVMETHOD(bus_setup_intr, bhnd_bhndb_setup_intr), 177 178 /* BHND interface */ 179 DEVMETHOD(bhnd_bus_get_attach_type, bhnd_bhndb_get_attach_type), 180 DEVMETHOD(bhnd_bus_is_hw_disabled, bhnd_bhndb_is_hw_disabled), 181 DEVMETHOD(bhnd_bus_find_hostb_device, bhnd_bhndb_find_hostb_device), 182 DEVMETHOD(bhnd_bus_read_board_info, bhnd_bhndb_read_board_info), 183 DEVMETHOD(bhnd_bus_map_intr, bhnd_bhndb_map_intr), 184 DEVMETHOD(bhnd_bus_unmap_intr, bhnd_bhndb_unmap_intr), 185 186 /* BHND PWRCTL hostb interface */ 187 DEVMETHOD(bhnd_pwrctl_hostb_get_clksrc, bhnd_bhndb_pwrctl_get_clksrc), 188 DEVMETHOD(bhnd_pwrctl_hostb_gate_clock, bhnd_bhndb_pwrctl_gate_clock), 189 DEVMETHOD(bhnd_pwrctl_hostb_ungate_clock, bhnd_bhndb_pwrctl_ungate_clock), 190 191 DEVMETHOD_END 192 }; 193 194 DEFINE_CLASS_0(bhnd, bhnd_bhndb_driver, bhnd_bhndb_methods, 0); 195