Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright (C) 2008 Advanced Micro Devices, Inc. |
Stefan Reinauer | 88ad6b0 | 2008-08-07 19:09:17 +0000 | [diff] [blame] | 5 | * Copyright (C) 2008 coresystems GmbH |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <libpayload.h> |
| 32 | #include <pci.h> |
| 33 | |
Stefan Reinauer | 88ad6b0 | 2008-08-07 19:09:17 +0000 | [diff] [blame] | 34 | u8 pci_read_config8(pcidev_t device, u16 reg) |
| 35 | { |
| 36 | outl(device | (reg & ~3), 0xCF8); |
| 37 | return inb(0xCFC + (reg & 3)); |
| 38 | } |
| 39 | |
| 40 | u16 pci_read_config16(pcidev_t device, u16 reg) |
| 41 | { |
| 42 | outl(device | (reg & ~3), 0xCF8); |
| 43 | return inw(0xCFC + (reg & 3)); |
| 44 | } |
| 45 | |
| 46 | u32 pci_read_config32(pcidev_t device, u16 reg) |
| 47 | { |
| 48 | outl(device | (reg & ~3), 0xCF8); |
| 49 | return inl(0xCFC + (reg & 3)); |
| 50 | } |
| 51 | |
| 52 | void pci_write_config8(pcidev_t device, u16 reg, u8 val) |
| 53 | { |
| 54 | outl(device | (reg & ~3), 0xCF8); |
| 55 | outb(val, 0xCFC + (reg & 3)); |
| 56 | } |
| 57 | |
| 58 | void pci_write_config16(pcidev_t device, u16 reg, u16 val) |
| 59 | { |
| 60 | outl(device | (reg & ~3), 0xCF8); |
| 61 | outw(val, 0xCFC + (reg & 3)); |
| 62 | } |
| 63 | |
| 64 | void pci_write_config32(pcidev_t device, u16 reg, u32 val) |
| 65 | { |
| 66 | outl(device | (reg & ~3), 0xCF8); |
| 67 | outl(val, 0xCFC + (reg & 3)); |
| 68 | } |
| 69 | |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 70 | static int find_on_bus(int bus, unsigned short vid, unsigned short did, |
| 71 | pcidev_t * dev) |
| 72 | { |
| 73 | int devfn; |
Stefan Reinauer | 88ad6b0 | 2008-08-07 19:09:17 +0000 | [diff] [blame] | 74 | u32 val; |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 75 | unsigned char hdr; |
| 76 | |
| 77 | for (devfn = 0; devfn < 0x100; devfn++) { |
Jordan Crouse | 6744231 | 2008-10-20 16:52:06 +0000 | [diff] [blame] | 78 | int func = devfn & 0x7; |
| 79 | int slot = (devfn >> 3) & 0x1f; |
| 80 | |
| 81 | val = pci_read_config32(PCI_DEV(bus, slot, func), |
| 82 | REG_VENDOR_ID); |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 83 | |
| 84 | if (val == 0xffffffff || val == 0x00000000 || |
| 85 | val == 0x0000ffff || val == 0xffff0000) |
| 86 | continue; |
| 87 | |
| 88 | if (val == ((did << 16) | vid)) { |
Jordan Crouse | 6744231 | 2008-10-20 16:52:06 +0000 | [diff] [blame] | 89 | *dev = PCI_DEV(bus, slot, func); |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 90 | return 1; |
| 91 | } |
| 92 | |
Jordan Crouse | 6744231 | 2008-10-20 16:52:06 +0000 | [diff] [blame] | 93 | hdr = pci_read_config8(PCI_DEV(bus, slot, func), |
| 94 | REG_HEADER_TYPE); |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 95 | hdr &= 0x7F; |
| 96 | |
| 97 | if (hdr == HEADER_TYPE_BRIDGE || hdr == HEADER_TYPE_CARDBUS) { |
| 98 | unsigned int busses; |
Jordan Crouse | 6744231 | 2008-10-20 16:52:06 +0000 | [diff] [blame] | 99 | busses = pci_read_config32(PCI_DEV(bus, slot, func), |
| 100 | REG_PRIMARY_BUS); |
| 101 | busses = (busses >> 8) & 0xFF; |
| 102 | |
| 103 | /* Avoid recursion if the new bus is the same as |
| 104 | * the old bus (insert lame The Who joke here) */ |
| 105 | |
| 106 | if ((busses != bus) && |
| 107 | find_on_bus(busses, vid, did, dev)) |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 108 | return 1; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
Stefan Reinauer | 88ad6b0 | 2008-08-07 19:09:17 +0000 | [diff] [blame] | 115 | int pci_find_device(u16 vid, u16 did, pcidev_t * dev) |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 116 | { |
| 117 | return find_on_bus(0, vid, did, dev); |
| 118 | } |
| 119 | |
Stefan Reinauer | 88ad6b0 | 2008-08-07 19:09:17 +0000 | [diff] [blame] | 120 | u32 pci_read_resource(pcidev_t dev, int bar) |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 121 | { |
Stefan Reinauer | 88ad6b0 | 2008-08-07 19:09:17 +0000 | [diff] [blame] | 122 | return pci_read_config32(dev, 0x10 + (bar * 4)); |
Jordan Crouse | 234e87f | 2008-04-10 22:50:44 +0000 | [diff] [blame] | 123 | } |
Jordan Crouse | 369a5f6 | 2008-10-20 16:51:20 +0000 | [diff] [blame] | 124 | |
| 125 | void pci_set_bus_master(pcidev_t dev) |
| 126 | { |
| 127 | u16 val = pci_read_config16(dev, REG_COMMAND); |
| 128 | val |= REG_COMMAND_BM; |
| 129 | pci_write_config16(dev, REG_COMMAND, val); |
| 130 | } |