| 1 | /*- |
| 2 | * Copyright (c) 2000, 2001 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: src/sys/dev/acpica/Osd/OsdHardware.c,v 1.13 2004/04/14 03:39:08 njl Exp $ |
| 28 | * $DragonFly: src/sys/dev/acpica5/Osd/OsdHardware.c,v 1.2 2004/06/27 08:52:42 dillon Exp $ |
| 29 | */ |
| 30 | |
| 31 | /* |
| 32 | * 6.7 : Hardware Abstraction |
| 33 | */ |
| 34 | |
| 35 | #include "acpi.h" |
| 36 | |
| 37 | #include <machine/bus_pio.h> |
| 38 | #include <machine/bus.h> |
| 39 | #include <machine/pci_cfgreg.h> |
| 40 | #include <bus/pci/pcireg.h> |
| 41 | |
| 42 | /* |
| 43 | * ACPICA's rather gung-ho approach to hardware resource ownership is a little |
| 44 | * troublesome insofar as there is no easy way for us to know in advance |
| 45 | * exactly which I/O resources it's going to want to use. |
| 46 | * |
| 47 | * In order to deal with this, we ignore resource ownership entirely, and simply |
| 48 | * use the native I/O space accessor functionality. This is Evil, but it works. |
| 49 | * |
| 50 | * XXX use an intermediate #define for the tag/handle |
| 51 | */ |
| 52 | |
| 53 | #ifdef __i386__ |
| 54 | #define ACPI_BUS_SPACE_IO I386_BUS_SPACE_IO |
| 55 | #define ACPI_BUS_HANDLE 0 |
| 56 | #endif |
| 57 | #ifdef __ia64__ |
| 58 | #define ACPI_BUS_SPACE_IO IA64_BUS_SPACE_IO |
| 59 | #define ACPI_BUS_HANDLE 0 |
| 60 | #endif |
| 61 | #ifdef __amd64__ |
| 62 | #define ACPI_BUS_SPACE_IO AMD64_BUS_SPACE_IO |
| 63 | #define ACPI_BUS_HANDLE 0 |
| 64 | #endif |
| 65 | |
| 66 | ACPI_STATUS |
| 67 | AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width) |
| 68 | { |
| 69 | switch (Width) { |
| 70 | case 8: |
| 71 | *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO, |
| 72 | ACPI_BUS_HANDLE, InPort); |
| 73 | break; |
| 74 | case 16: |
| 75 | *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO, |
| 76 | ACPI_BUS_HANDLE, InPort); |
| 77 | break; |
| 78 | case 32: |
| 79 | *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO, |
| 80 | ACPI_BUS_HANDLE, InPort); |
| 81 | break; |
| 82 | default: |
| 83 | /* debug trap goes here */ |
| 84 | break; |
| 85 | } |
| 86 | |
| 87 | return (AE_OK); |
| 88 | } |
| 89 | |
| 90 | ACPI_STATUS |
| 91 | AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width) |
| 92 | { |
| 93 | switch (Width) { |
| 94 | case 8: |
| 95 | bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); |
| 96 | break; |
| 97 | case 16: |
| 98 | bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); |
| 99 | break; |
| 100 | case 32: |
| 101 | bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value); |
| 102 | break; |
| 103 | default: |
| 104 | /* debug trap goes here */ |
| 105 | break; |
| 106 | } |
| 107 | |
| 108 | return (AE_OK); |
| 109 | } |
| 110 | |
| 111 | ACPI_STATUS |
| 112 | AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value, |
| 113 | UINT32 Width) |
| 114 | { |
| 115 | u_int32_t byte_width = Width / 8; |
| 116 | u_int32_t val; |
| 117 | |
| 118 | if (!pci_cfgregopen()) |
| 119 | return (AE_NOT_EXIST); |
| 120 | |
| 121 | val = pci_cfgregread(PciId->Bus, PciId->Device, PciId->Function, Register, |
| 122 | byte_width); |
| 123 | switch (Width) { |
| 124 | case 8: |
| 125 | *(u_int8_t *)Value = val & 0xff; |
| 126 | break; |
| 127 | case 16: |
| 128 | *(u_int16_t *)Value = val & 0xffff; |
| 129 | break; |
| 130 | case 32: |
| 131 | *(u_int32_t *)Value = val; |
| 132 | break; |
| 133 | default: |
| 134 | /* debug trap goes here */ |
| 135 | break; |
| 136 | } |
| 137 | |
| 138 | return (AE_OK); |
| 139 | } |
| 140 | |
| 141 | |
| 142 | ACPI_STATUS |
| 143 | AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, |
| 144 | ACPI_INTEGER Value, UINT32 Width) |
| 145 | { |
| 146 | u_int32_t byte_width = Width / 8; |
| 147 | |
| 148 | if (!pci_cfgregopen()) |
| 149 | return (AE_NOT_EXIST); |
| 150 | |
| 151 | pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register, |
| 152 | Value, byte_width); |
| 153 | |
| 154 | return (AE_OK); |
| 155 | } |
| 156 | |
| 157 | /* XXX should use acpivar.h but too many include dependencies */ |
| 158 | extern ACPI_STATUS acpi_GetInteger(ACPI_HANDLE handle, char *path, int |
| 159 | *number); |
| 160 | |
| 161 | /* |
| 162 | * Depth-first recursive case for finding the bus, given the slot/function. |
| 163 | */ |
| 164 | static int |
| 165 | acpi_bus_number(ACPI_HANDLE root, ACPI_HANDLE curr, ACPI_PCI_ID *PciId) |
| 166 | { |
| 167 | ACPI_HANDLE parent; |
| 168 | ACPI_STATUS status; |
| 169 | ACPI_OBJECT_TYPE type; |
| 170 | UINT32 adr; |
| 171 | int bus, slot, func, class, subclass, header; |
| 172 | |
| 173 | /* Try to get the _BBN object of the root, otherwise assume it is 0. */ |
| 174 | bus = 0; |
| 175 | if (root == curr) { |
| 176 | status = acpi_GetInteger(root, "_BBN", &bus); |
| 177 | if (ACPI_FAILURE(status) && bootverbose) |
| 178 | printf("acpi_bus_number: root bus has no _BBN, assuming 0\n"); |
| 179 | return (bus); |
| 180 | } |
| 181 | status = AcpiGetParent(curr, &parent); |
| 182 | if (ACPI_FAILURE(status)) |
| 183 | return (bus); |
| 184 | |
| 185 | /* First, recurse up the tree until we find the host bus. */ |
| 186 | bus = acpi_bus_number(root, parent, PciId); |
| 187 | |
| 188 | /* Validate parent bus device type. */ |
| 189 | if (ACPI_FAILURE(AcpiGetType(parent, &type)) || type != ACPI_TYPE_DEVICE) { |
| 190 | printf("acpi_bus_number: not a device, type %d\n", type); |
| 191 | return (bus); |
| 192 | } |
| 193 | |
| 194 | /* Get the parent's slot and function. */ |
| 195 | status = acpi_GetInteger(parent, "_ADR", &adr); |
| 196 | if (ACPI_FAILURE(status)) { |
| 197 | printf("acpi_bus_number: can't get _ADR\n"); |
| 198 | return (bus); |
| 199 | } |
| 200 | slot = ACPI_HIWORD(adr); |
| 201 | func = ACPI_LOWORD(adr); |
| 202 | |
| 203 | /* Is this a PCI-PCI or Cardbus-PCI bridge? */ |
| 204 | class = pci_cfgregread(bus, slot, func, PCIR_CLASS, 1); |
| 205 | if (class != PCIC_BRIDGE) |
| 206 | return (bus); |
| 207 | subclass = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 1); |
| 208 | |
| 209 | /* Find the header type, masking off the multifunction bit. */ |
| 210 | header = pci_cfgregread(bus, slot, func, PCIR_HDRTYPE, 1) & PCIM_HDRTYPE; |
| 211 | if (header == PCIM_HDRTYPE_BRIDGE && subclass == PCIS_BRIDGE_PCI) |
| 212 | bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_1, 1); |
| 213 | if (header == PCIM_HDRTYPE_CARDBUS && subclass == PCIS_BRIDGE_CARDBUS) |
| 214 | bus = pci_cfgregread(bus, slot, func, PCIR_SECBUS_2, 1); |
| 215 | return (bus); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Find the bus number for a device |
| 220 | * |
| 221 | * rhandle: handle for the root bus |
| 222 | * chandle: handle for the device |
| 223 | * PciId: pointer to device slot and function, we fill out bus |
| 224 | */ |
| 225 | void |
| 226 | AcpiOsDerivePciId(ACPI_HANDLE rhandle, ACPI_HANDLE chandle, ACPI_PCI_ID **PciId) |
| 227 | { |
| 228 | ACPI_HANDLE parent; |
| 229 | ACPI_STATUS status; |
| 230 | int bus; |
| 231 | |
| 232 | if (pci_cfgregopen() == 0) |
| 233 | panic("AcpiOsDerivePciId unable to initialize pci bus"); |
| 234 | |
| 235 | /* Try to read _BBN for bus number if we're at the root */ |
| 236 | bus = 0; |
| 237 | if (rhandle == chandle) { |
| 238 | status = acpi_GetInteger(rhandle, "_BBN", &bus); |
| 239 | if (ACPI_FAILURE(status) && bootverbose) |
| 240 | printf("AcpiOsDerivePciId: root bus has no _BBN, assuming 0\n"); |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * Get the parent handle and call the recursive case. It is not |
| 245 | * clear why we seem to be getting a chandle that points to a child |
| 246 | * of the desired slot/function but passing in the parent handle |
| 247 | * here works. |
| 248 | */ |
| 249 | if (ACPI_SUCCESS(AcpiGetParent(chandle, &parent))) |
| 250 | bus = acpi_bus_number(rhandle, parent, *PciId); |
| 251 | (*PciId)->Bus = bus; |
| 252 | if (bootverbose) { |
| 253 | printf("AcpiOsDerivePciId: bus %d dev %d func %d\n", |
| 254 | (*PciId)->Bus, (*PciId)->Device, (*PciId)->Function); |
| 255 | } |
| 256 | } |