hostb_pci.c revision 302408
1260684Skaiw/* 2260684Skaiw * Copyright (c) 1997, Stefan Esser <se@freebsd.org> 3260684Skaiw * All rights reserved. 4260684Skaiw * 5260684Skaiw * Redistribution and use in source and binary forms, with or without 6260684Skaiw * modification, are permitted provided that the following conditions 7260684Skaiw * are met: 8260684Skaiw * 1. Redistributions of source code must retain the above copyright 9260684Skaiw * notice unmodified, this list of conditions, and the following 10260684Skaiw * disclaimer. 11260684Skaiw * 2. Redistributions in binary form must reproduce the above copyright 12260684Skaiw * notice, this list of conditions and the following disclaimer in the 13260684Skaiw * documentation and/or other materials provided with the distribution. 14260684Skaiw * 15260684Skaiw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16260684Skaiw * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17260684Skaiw * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18260684Skaiw * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19260684Skaiw * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20260684Skaiw * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21260684Skaiw * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22260684Skaiw * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23260684Skaiw * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24260684Skaiw * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25260684Skaiw */ 26260684Skaiw 27260684Skaiw#include <sys/cdefs.h> 28260684Skaiw__FBSDID("$FreeBSD: stable/11/sys/dev/pci/hostb_pci.c 298955 2016-05-03 03:41:25Z pfg $"); 29260684Skaiw 30260684Skaiw#include <sys/param.h> 31260684Skaiw#include <sys/bus.h> 32260684Skaiw#include <sys/kernel.h> 33260684Skaiw#include <sys/module.h> 34260684Skaiw 35260684Skaiw#include <dev/pci/pcivar.h> 36300311Semaste#include <dev/pci/pcireg.h> 37260684Skaiw 38260684Skaiw/* 39260684Skaiw * Provide a device to "eat" the host->pci bridge devices that show up 40260684Skaiw * on PCI busses and stop them showing up twice on the probes. This also 41260684Skaiw * stops them showing up as 'none' in pciconf -l. If the host bridge 42260684Skaiw * provides an AGP capability then we create a child agp device for the 43260684Skaiw * agp GART driver to attach to. 44260684Skaiw */ 45260684Skaiwstatic int 46260684Skaiwpci_hostb_probe(device_t dev) 47260684Skaiw{ 48260684Skaiw u_int32_t id; 49260684Skaiw 50260684Skaiw id = pci_get_devid(dev); 51260684Skaiw 52260684Skaiw switch (id) { 53260684Skaiw 54260684Skaiw /* VIA VT82C596 Power Management Function */ 55260684Skaiw case 0x30501106: 56260684Skaiw return (ENXIO); 57260684Skaiw 58260684Skaiw default: 59260684Skaiw break; 60260684Skaiw } 61260684Skaiw 62260684Skaiw if (pci_get_class(dev) == PCIC_BRIDGE && 63260684Skaiw pci_get_subclass(dev) == PCIS_BRIDGE_HOST) { 64260684Skaiw device_set_desc(dev, "Host to PCI bridge"); 65260684Skaiw device_quiet(dev); 66260684Skaiw return (-10000); 67300311Semaste } 68260684Skaiw return (ENXIO); 69260684Skaiw} 70260684Skaiw 71260684Skaiwstatic int 72260684Skaiwpci_hostb_attach(device_t dev) 73260684Skaiw{ 74260684Skaiw 75260684Skaiw bus_generic_probe(dev); 76260684Skaiw 77260684Skaiw /* 78260684Skaiw * If AGP capabilities are present on this device, then create 79260684Skaiw * an AGP child. 80260684Skaiw */ 81260684Skaiw if (pci_find_cap(dev, PCIY_AGP, NULL) == 0) 82260684Skaiw device_add_child(dev, "agp", -1); 83260684Skaiw bus_generic_attach(dev); 84260684Skaiw return (0); 85260684Skaiw} 86260684Skaiw 87260684Skaiw/* Bus interface. */ 88260684Skaiw 89260684Skaiwstatic int 90260684Skaiwpci_hostb_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 91260684Skaiw{ 92260684Skaiw 93260684Skaiw return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result)); 94260684Skaiw} 95260684Skaiw 96260684Skaiwstatic int 97260684Skaiwpci_hostb_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 98260684Skaiw{ 99260684Skaiw 100260684Skaiw return (EINVAL); 101260684Skaiw} 102260684Skaiw 103260684Skaiwstatic struct resource * 104260684Skaiwpci_hostb_alloc_resource(device_t dev, device_t child, int type, int *rid, 105260684Skaiw rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 106260684Skaiw{ 107260684Skaiw 108260684Skaiw return (bus_alloc_resource(dev, type, rid, start, end, count, flags)); 109260684Skaiw} 110260684Skaiw 111276371Semastestatic int 112260684Skaiwpci_hostb_release_resource(device_t dev, device_t child, int type, int rid, 113260684Skaiw struct resource *r) 114260684Skaiw{ 115260684Skaiw 116260684Skaiw return (bus_release_resource(dev, type, rid, r)); 117260684Skaiw} 118260684Skaiw 119260684Skaiw/* PCI interface. */ 120260684Skaiw 121260684Skaiwstatic uint32_t 122260684Skaiwpci_hostb_read_config(device_t dev, device_t child, int reg, int width) 123260684Skaiw{ 124260684Skaiw 125260684Skaiw return (pci_read_config(dev, reg, width)); 126260684Skaiw} 127260684Skaiw 128260684Skaiwstatic void 129260684Skaiwpci_hostb_write_config(device_t dev, device_t child, int reg, 130260684Skaiw uint32_t val, int width) 131260684Skaiw{ 132260684Skaiw 133260684Skaiw pci_write_config(dev, reg, val, width); 134260684Skaiw} 135260684Skaiw 136260684Skaiwstatic int 137260684Skaiwpci_hostb_enable_busmaster(device_t dev, device_t child) 138260684Skaiw{ 139260684Skaiw 140260684Skaiw device_printf(dev, "child %s requested pci_enable_busmaster\n", 141260684Skaiw device_get_nameunit(child)); 142260684Skaiw return (pci_enable_busmaster(dev)); 143260684Skaiw} 144260684Skaiw 145260684Skaiwstatic int 146260684Skaiwpci_hostb_disable_busmaster(device_t dev, device_t child) 147260684Skaiw{ 148260684Skaiw 149260684Skaiw device_printf(dev, "child %s requested pci_disable_busmaster\n", 150260684Skaiw device_get_nameunit(child)); 151260684Skaiw return (pci_disable_busmaster(dev)); 152260684Skaiw} 153260684Skaiw 154260684Skaiwstatic int 155260684Skaiwpci_hostb_enable_io(device_t dev, device_t child, int space) 156260684Skaiw{ 157260684Skaiw 158260684Skaiw device_printf(dev, "child %s requested pci_enable_io\n", 159260684Skaiw device_get_nameunit(child)); 160260684Skaiw return (pci_enable_io(dev, space)); 161260684Skaiw} 162260684Skaiw 163260684Skaiwstatic int 164260684Skaiwpci_hostb_disable_io(device_t dev, device_t child, int space) 165260684Skaiw{ 166260684Skaiw 167260684Skaiw device_printf(dev, "child %s requested pci_disable_io\n", 168260684Skaiw device_get_nameunit(child)); 169260684Skaiw return (pci_disable_io(dev, space)); 170260684Skaiw} 171260684Skaiw 172260684Skaiwstatic int 173260684Skaiwpci_hostb_set_powerstate(device_t dev, device_t child, int state) 174260684Skaiw{ 175260684Skaiw 176260684Skaiw device_printf(dev, "child %s requested pci_set_powerstate\n", 177260684Skaiw device_get_nameunit(child)); 178260684Skaiw return (pci_set_powerstate(dev, state)); 179260684Skaiw} 180260684Skaiw 181260684Skaiwstatic int 182260684Skaiwpci_hostb_get_powerstate(device_t dev, device_t child) 183260684Skaiw{ 184260684Skaiw 185260684Skaiw device_printf(dev, "child %s requested pci_get_powerstate\n", 186260684Skaiw device_get_nameunit(child)); 187260684Skaiw return (pci_get_powerstate(dev)); 188260684Skaiw} 189260684Skaiw 190260684Skaiwstatic int 191260684Skaiwpci_hostb_assign_interrupt(device_t dev, device_t child) 192260684Skaiw{ 193276371Semaste 194260684Skaiw device_printf(dev, "child %s requested pci_assign_interrupt\n", 195260684Skaiw device_get_nameunit(child)); 196260684Skaiw return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev)); 197260684Skaiw} 198260684Skaiw 199260684Skaiwstatic int 200260684Skaiwpci_hostb_find_cap(device_t dev, device_t child, int capability, 201260684Skaiw int *capreg) 202276371Semaste{ 203260684Skaiw 204260684Skaiw return (pci_find_cap(dev, capability, capreg)); 205276371Semaste} 206260684Skaiw 207260684Skaiwstatic int 208260684Skaiwpci_hostb_find_extcap(device_t dev, device_t child, int capability, 209260684Skaiw int *capreg) 210260684Skaiw{ 211260684Skaiw 212260684Skaiw return (pci_find_extcap(dev, capability, capreg)); 213260684Skaiw} 214260684Skaiw 215260684Skaiwstatic int 216260684Skaiwpci_hostb_find_htcap(device_t dev, device_t child, int capability, 217260684Skaiw int *capreg) 218260684Skaiw{ 219260684Skaiw 220260684Skaiw return (pci_find_htcap(dev, capability, capreg)); 221260684Skaiw} 222260684Skaiw 223260684Skaiwstatic device_method_t pci_hostb_methods[] = { 224260684Skaiw /* Device interface */ 225260684Skaiw DEVMETHOD(device_probe, pci_hostb_probe), 226260684Skaiw DEVMETHOD(device_attach, pci_hostb_attach), 227260684Skaiw DEVMETHOD(device_shutdown, bus_generic_shutdown), 228260684Skaiw DEVMETHOD(device_suspend, bus_generic_suspend), 229260684Skaiw DEVMETHOD(device_resume, bus_generic_resume), 230260684Skaiw 231260684Skaiw /* Bus interface */ 232260684Skaiw DEVMETHOD(bus_read_ivar, pci_hostb_read_ivar), 233260684Skaiw DEVMETHOD(bus_write_ivar, pci_hostb_write_ivar), 234260684Skaiw DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 235260684Skaiw DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 236260684Skaiw 237260684Skaiw DEVMETHOD(bus_alloc_resource, pci_hostb_alloc_resource), 238260684Skaiw DEVMETHOD(bus_release_resource, pci_hostb_release_resource), 239260684Skaiw DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 240260684Skaiw DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 241260684Skaiw 242260684Skaiw /* PCI interface */ 243260684Skaiw DEVMETHOD(pci_read_config, pci_hostb_read_config), 244260684Skaiw DEVMETHOD(pci_write_config, pci_hostb_write_config), 245260684Skaiw DEVMETHOD(pci_enable_busmaster, pci_hostb_enable_busmaster), 246260684Skaiw DEVMETHOD(pci_disable_busmaster, pci_hostb_disable_busmaster), 247260684Skaiw DEVMETHOD(pci_enable_io, pci_hostb_enable_io), 248260684Skaiw DEVMETHOD(pci_disable_io, pci_hostb_disable_io), 249260684Skaiw DEVMETHOD(pci_get_powerstate, pci_hostb_get_powerstate), 250276371Semaste DEVMETHOD(pci_set_powerstate, pci_hostb_set_powerstate), 251260684Skaiw DEVMETHOD(pci_assign_interrupt, pci_hostb_assign_interrupt), 252260684Skaiw DEVMETHOD(pci_find_cap, pci_hostb_find_cap), 253260684Skaiw DEVMETHOD(pci_find_extcap, pci_hostb_find_extcap), 254260684Skaiw DEVMETHOD(pci_find_htcap, pci_hostb_find_htcap), 255276371Semaste 256260684Skaiw { 0, 0 } 257260684Skaiw}; 258260684Skaiw 259260684Skaiwstatic driver_t pci_hostb_driver = { 260260684Skaiw "hostb", 261260684Skaiw pci_hostb_methods, 262260684Skaiw 1, 263260684Skaiw}; 264260684Skaiw 265260684Skaiwstatic devclass_t pci_hostb_devclass; 266260684Skaiw 267260684SkaiwDRIVER_MODULE(hostb, pci, pci_hostb_driver, pci_hostb_devclass, 0, 0); 268260684Skaiw