1 /*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 #include "opt_acpi.h" 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/malloc.h> 33 #include <sys/kernel.h> 34 35 #include "acpi.h" 36 37 #include <dev/acpica/acpivar.h> 38 39 #include <machine/pci_cfgreg.h> 40 #include <pci/pcivar.h> 41 #include <pci/pcib_private.h> 42 #include "pcib_if.h" 43 44 #include <dev/acpica/acpi_pcibvar.h> 45 46 /* 47 * Hooks for the ACPI CA debugging infrastructure 48 */ 49 #define _COMPONENT ACPI_BUS 50 ACPI_MODULE_NAME("PCI_ACPI") 51 52 struct acpi_hpcib_softc { 53 device_t ap_dev; 54 ACPI_HANDLE ap_handle; 55 56 int ap_segment; /* analagous to Alpha 'hose' */ 57 int ap_bus; /* bios-assigned bus number */ 58 59 ACPI_BUFFER ap_prt; /* interrupt routing table */ 60 }; 61 62 63 static int acpi_pcib_acpi_probe(device_t bus); 64 static int acpi_pcib_acpi_attach(device_t bus); 65 static int acpi_pcib_acpi_resume(device_t bus); 66 static int acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result); 67 static int acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value); 68 static u_int32_t acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes); 69 static void acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg, 70 u_int32_t data, int bytes); 71 static int acpi_pcib_acpi_route_interrupt(device_t pcib, 72 device_t dev, int pin); 73 74 static device_method_t acpi_pcib_acpi_methods[] = { 75 /* Device interface */ 76 DEVMETHOD(device_probe, acpi_pcib_acpi_probe), 77 DEVMETHOD(device_attach, acpi_pcib_acpi_attach), 78 DEVMETHOD(device_shutdown, bus_generic_shutdown), 79 DEVMETHOD(device_suspend, bus_generic_suspend), 80 DEVMETHOD(device_resume, acpi_pcib_acpi_resume), 81 82 /* Bus interface */ 83 DEVMETHOD(bus_print_child, bus_generic_print_child), 84 DEVMETHOD(bus_read_ivar, acpi_pcib_read_ivar), 85 DEVMETHOD(bus_write_ivar, acpi_pcib_write_ivar), 86 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 87 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 88 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 89 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 90 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 91 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 92 93 /* pcib interface */ 94 DEVMETHOD(pcib_maxslots, pcib_maxslots), 95 DEVMETHOD(pcib_read_config, acpi_pcib_read_config), 96 DEVMETHOD(pcib_write_config, acpi_pcib_write_config), 97 DEVMETHOD(pcib_route_interrupt, acpi_pcib_acpi_route_interrupt), 98 99 {0, 0} 100 }; 101 102 static driver_t acpi_pcib_acpi_driver = { 103 "pcib", 104 acpi_pcib_acpi_methods, 105 sizeof(struct acpi_hpcib_softc), 106 }; 107 108 DRIVER_MODULE(acpi_pcib, acpi, acpi_pcib_acpi_driver, pcib_devclass, 0, 0); 109 110 static int 111 acpi_pcib_acpi_probe(device_t dev) 112 { 113 114 if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 115 !acpi_disabled("pci") && 116 acpi_MatchHid(dev, "PNP0A03")) { 117 118 if (!pci_cfgregopen()) 119 return(ENXIO); 120 121 /* 122 * Set device description 123 */ 124 device_set_desc(dev, "ACPI Host-PCI bridge"); 125 return(0); 126 } 127 return(ENXIO); 128 } 129 130 static int 131 acpi_pcib_acpi_attach(device_t dev) 132 { 133 struct acpi_hpcib_softc *sc; 134 ACPI_STATUS status; 135 136 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 137 138 sc = device_get_softc(dev); 139 sc->ap_dev = dev; 140 sc->ap_handle = acpi_get_handle(dev); 141 142 /* 143 * Get our base bus number by evaluating _BBN. If that doesn't work, try _ADR. 144 * If this doesn't work, we assume we're bus number 0. 145 * 146 * XXX note that it may also not exist in the case where we are 147 * meant to use a private configuration space mechanism for this bus, 148 * so we should dig out our resources and check to see if we have 149 * anything like that. How do we do this? 150 * XXX If we have the requisite information, and if we don't think the 151 * default PCI configuration space handlers can deal with this bus, 152 * we should attach our own handler. 153 * XXX invoke _REG on this for the PCI config space address space? 154 */ 155 if (ACPI_FAILURE(status = acpi_EvaluateInteger(sc->ap_handle, "_BBN", &sc->ap_bus))) { 156 if (status != AE_NOT_FOUND) { 157 device_printf(dev, "could not evaluate _BBN - %s\n", AcpiFormatException(status)); 158 return_VALUE(ENXIO); 159 } 160 if (ACPI_FAILURE(status = acpi_EvaluateInteger(sc->ap_handle, "_ADR", &sc->ap_bus))) { 161 if (status != AE_NOT_FOUND) { 162 device_printf(dev, "could not evaluate _ADR - %s\n", AcpiFormatException(status)); 163 return_VALUE(ENXIO); 164 } 165 } else { 166 /* if it's not found, assume 0 */ 167 sc->ap_bus = 0; 168 } 169 } 170 171 /* 172 * Get our segment number by evaluating _SEG 173 * It's OK for this to not exist. 174 */ 175 if (ACPI_FAILURE(status = acpi_EvaluateInteger(sc->ap_handle, "_SEG", &sc->ap_segment))) { 176 if (status != AE_NOT_FOUND) { 177 device_printf(dev, "could not evaluate _SEG - %s\n", AcpiFormatException(status)); 178 return_VALUE(ENXIO); 179 } 180 /* if it's not found, assume 0 */ 181 sc->ap_segment = 0; 182 } 183 184 return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_bus)); 185 } 186 187 static int 188 acpi_pcib_acpi_resume(device_t dev) 189 { 190 struct acpi_hpcib_softc *sc = device_get_softc(dev); 191 192 return (acpi_pcib_resume(dev, &sc->ap_prt, sc->ap_bus)); 193 } 194 195 /* 196 * Support for standard PCI bridge ivars. 197 */ 198 static int 199 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 200 { 201 struct acpi_hpcib_softc *sc = device_get_softc(dev); 202 203 switch (which) { 204 case PCIB_IVAR_BUS: 205 *result = sc->ap_bus; 206 return(0); 207 case ACPI_IVAR_HANDLE: 208 *result = (uintptr_t)sc->ap_handle; 209 return(0); 210 } 211 return(ENOENT); 212 } 213 214 static int 215 acpi_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 216 { 217 struct acpi_hpcib_softc *sc = device_get_softc(dev); 218 219 switch (which) { 220 case PCIB_IVAR_BUS: 221 sc->ap_bus = value; 222 return(0); 223 } 224 return(ENOENT); 225 } 226 227 static u_int32_t 228 acpi_pcib_read_config(device_t dev, int bus, int slot, int func, int reg, int bytes) 229 { 230 return(pci_cfgregread(bus, slot, func, reg, bytes)); 231 } 232 233 static void 234 acpi_pcib_write_config(device_t dev, int bus, int slot, int func, int reg, u_int32_t data, int bytes) 235 { 236 pci_cfgregwrite(bus, slot, func, reg, data, bytes); 237 } 238 239 static int 240 acpi_pcib_acpi_route_interrupt(device_t pcib, device_t dev, int pin) 241 { 242 struct acpi_hpcib_softc *sc; 243 244 /* find the bridge softc */ 245 sc = device_get_softc(pcib); 246 return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt)); 247 } 248