Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1 | /* |
Stefan Reinauer | 7e61e45 | 2008-01-18 10:35:56 +0000 | [diff] [blame] | 2 | * This file is part of the coreboot project. |
Uwe Hermann | b80dbf0 | 2007-04-22 19:08:13 +0000 | [diff] [blame] | 3 | * |
| 4 | * It was originally based on the Linux kernel (drivers/pci/pci.c). |
| 5 | * |
| 6 | * Modifications are: |
| 7 | * Copyright (C) 2003-2004 Linux Networx |
| 8 | * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx) |
| 9 | * Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com> |
| 10 | * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov> |
| 11 | * Copyright (C) 2005-2006 Tyan |
| 12 | * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan) |
Patrick Georgi | 16cdbb2 | 2009-04-21 20:14:31 +0000 | [diff] [blame] | 13 | * Copyright (C) 2005-2009 coresystems GmbH |
| 14 | * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH) |
Mike Loptien | 0f5cf5e | 2014-05-12 21:46:31 -0600 | [diff] [blame] | 15 | * Copyright (C) 2014 Sage Electronic Engineering, LLC. |
Uwe Hermann | b80dbf0 | 2007-04-22 19:08:13 +0000 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | /* |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 19 | * PCI Bus Services, see include/linux/pci.h for further explanation. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 20 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 21 | * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter, |
| 22 | * David Mosberger-Tang |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 23 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 24 | * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 25 | */ |
| 26 | |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 27 | #include <kconfig.h> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 28 | #include <console/console.h> |
| 29 | #include <stdlib.h> |
| 30 | #include <stdint.h> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 31 | #include <string.h> |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 32 | #include <arch/io.h> |
Kyösti Mälkki | 58ceb00 | 2014-06-20 06:21:01 +0300 | [diff] [blame] | 33 | #include <arch/acpi.h> |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 34 | #include <device/device.h> |
| 35 | #include <device/pci.h> |
| 36 | #include <device/pci_ids.h> |
Kyösti Mälkki | ab56b3b | 2013-11-28 16:44:51 +0200 | [diff] [blame] | 37 | #include <bootmode.h> |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 38 | #include <delay.h> |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 39 | #if CONFIG_HYPERTRANSPORT_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 40 | #include <device/hypertransport.h> |
| 41 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 42 | #if CONFIG_PCIX_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 43 | #include <device/pcix.h> |
| 44 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 45 | #if CONFIG_PCIEXP_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 46 | #include <device/pciexp.h> |
| 47 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 48 | #if CONFIG_AGP_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 49 | #include <device/agp.h> |
| 50 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 51 | #if CONFIG_CARDBUS_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 52 | #include <device/cardbus.h> |
| 53 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 54 | #if CONFIG_PC80_SYSTEM |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 55 | #include <pc80/i8259.h> |
| 56 | #endif |
Stefan Reinauer | 74a0efe | 2012-03-30 17:10:49 -0700 | [diff] [blame] | 57 | #if CONFIG_CHROMEOS |
| 58 | #include <vendorcode/google/chromeos/chromeos.h> |
| 59 | #endif |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 60 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 61 | u8 pci_moving_config8(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 62 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 63 | u8 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 64 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 65 | value = pci_read_config8(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 66 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 67 | pci_write_config8(dev, reg, 0xff); |
| 68 | ones = pci_read_config8(dev, reg); |
| 69 | |
| 70 | pci_write_config8(dev, reg, 0x00); |
| 71 | zeroes = pci_read_config8(dev, reg); |
| 72 | |
| 73 | pci_write_config8(dev, reg, value); |
| 74 | |
| 75 | return ones ^ zeroes; |
| 76 | } |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 77 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 78 | u16 pci_moving_config16(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 79 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 80 | u16 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 81 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 82 | value = pci_read_config16(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 83 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 84 | pci_write_config16(dev, reg, 0xffff); |
| 85 | ones = pci_read_config16(dev, reg); |
| 86 | |
| 87 | pci_write_config16(dev, reg, 0x0000); |
| 88 | zeroes = pci_read_config16(dev, reg); |
| 89 | |
| 90 | pci_write_config16(dev, reg, value); |
| 91 | |
| 92 | return ones ^ zeroes; |
| 93 | } |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 94 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 95 | u32 pci_moving_config32(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 96 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 97 | u32 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 98 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 99 | value = pci_read_config32(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 100 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 101 | pci_write_config32(dev, reg, 0xffffffff); |
| 102 | ones = pci_read_config32(dev, reg); |
| 103 | |
| 104 | pci_write_config32(dev, reg, 0x00000000); |
| 105 | zeroes = pci_read_config32(dev, reg); |
| 106 | |
| 107 | pci_write_config32(dev, reg, value); |
| 108 | |
| 109 | return ones ^ zeroes; |
| 110 | } |
| 111 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 112 | /** |
| 113 | * Given a device, a capability type, and a last position, return the next |
| 114 | * matching capability. Always start at the head of the list. |
| 115 | * |
| 116 | * @param dev Pointer to the device structure. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 117 | * @param cap PCI_CAP_LIST_ID of the PCI capability we're looking for. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 118 | * @param last Location of the PCI capability register to start from. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 119 | * @return The next matching capability. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 120 | */ |
| 121 | unsigned pci_find_next_capability(struct device *dev, unsigned cap, |
| 122 | unsigned last) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 123 | { |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 124 | unsigned pos = 0; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 125 | u16 status; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 126 | unsigned reps = 48; |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 127 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 128 | status = pci_read_config16(dev, PCI_STATUS); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 129 | if (!(status & PCI_STATUS_CAP_LIST)) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 130 | return 0; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 131 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 132 | switch (dev->hdr_type & 0x7f) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 133 | case PCI_HEADER_TYPE_NORMAL: |
| 134 | case PCI_HEADER_TYPE_BRIDGE: |
| 135 | pos = PCI_CAPABILITY_LIST; |
| 136 | break; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 137 | case PCI_HEADER_TYPE_CARDBUS: |
| 138 | pos = PCI_CB_CAPABILITY_LIST; |
| 139 | break; |
| 140 | default: |
| 141 | return 0; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 142 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 143 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 144 | pos = pci_read_config8(dev, pos); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 145 | while (reps-- && (pos >= 0x40)) { /* Loop through the linked list. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 146 | int this_cap; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 147 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 148 | pos &= ~3; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 149 | this_cap = pci_read_config8(dev, pos + PCI_CAP_LIST_ID); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 150 | printk(BIOS_SPEW, "Capability: type 0x%02x @ 0x%02x\n", |
| 151 | this_cap, pos); |
| 152 | if (this_cap == 0xff) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 153 | break; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 154 | |
| 155 | if (!last && (this_cap == cap)) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 156 | return pos; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 157 | |
| 158 | if (last == pos) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 159 | last = 0; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 160 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 161 | pos = pci_read_config8(dev, pos + PCI_CAP_LIST_NEXT); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 162 | } |
| 163 | return 0; |
| 164 | } |
| 165 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 166 | /** |
| 167 | * Given a device, and a capability type, return the next matching |
| 168 | * capability. Always start at the head of the list. |
| 169 | * |
| 170 | * @param dev Pointer to the device structure. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 171 | * @param cap PCI_CAP_LIST_ID of the PCI capability we're looking for. |
| 172 | * @return The next matching capability. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 173 | */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 174 | unsigned pci_find_capability(device_t dev, unsigned cap) |
| 175 | { |
| 176 | return pci_find_next_capability(dev, cap, 0); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 177 | } |
| 178 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 179 | /** |
| 180 | * Given a device and register, read the size of the BAR for that register. |
| 181 | * |
| 182 | * @param dev Pointer to the device structure. |
| 183 | * @param index Address of the PCI configuration register. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 184 | * @return TODO |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 185 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 186 | struct resource *pci_get_resource(struct device *dev, unsigned long index) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 187 | { |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 188 | struct resource *resource; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 189 | unsigned long value, attr; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 190 | resource_t moving, limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 191 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 192 | /* Initialize the resources to nothing. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 193 | resource = new_resource(dev, index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 194 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 195 | /* Get the initial value. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 196 | value = pci_read_config32(dev, index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 197 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 198 | /* See which bits move. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 199 | moving = pci_moving_config32(dev, index); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 200 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 201 | /* Initialize attr to the bits that do not move. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 202 | attr = value & ~moving; |
| 203 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 204 | /* If it is a 64bit resource look at the high half as well. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 205 | if (((attr & PCI_BASE_ADDRESS_SPACE_IO) == 0) && |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 206 | ((attr & PCI_BASE_ADDRESS_MEM_LIMIT_MASK) == |
| 207 | PCI_BASE_ADDRESS_MEM_LIMIT_64)) { |
| 208 | /* Find the high bits that move. */ |
| 209 | moving |= |
| 210 | ((resource_t) pci_moving_config32(dev, index + 4)) << 32; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 211 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 212 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 213 | /* Find the resource constraints. |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 214 | * Start by finding the bits that move. From there: |
| 215 | * - Size is the least significant bit of the bits that move. |
| 216 | * - Limit is all of the bits that move plus all of the lower bits. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 217 | * See PCI Spec 6.2.5.1. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 218 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 219 | limit = 0; |
| 220 | if (moving) { |
| 221 | resource->size = 1; |
| 222 | resource->align = resource->gran = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 223 | while (!(moving & resource->size)) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 224 | resource->size <<= 1; |
| 225 | resource->align += 1; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 226 | resource->gran += 1; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 227 | } |
| 228 | resource->limit = limit = moving | (resource->size - 1); |
| 229 | } |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 230 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 231 | /* |
| 232 | * Some broken hardware has read-only registers that do not |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 233 | * really size correctly. |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 234 | * |
| 235 | * Example: the Acer M7229 has BARs 1-4 normally read-only, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 236 | * so BAR1 at offset 0x10 reads 0x1f1. If you size that register |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 237 | * by writing 0xffffffff to it, it will read back as 0x1f1 -- which |
| 238 | * is a violation of the spec. |
| 239 | * |
| 240 | * We catch this case and ignore it by observing which bits move. |
| 241 | * |
| 242 | * This also catches the common case of unimplemented registers |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 243 | * that always read back as 0. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 244 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 245 | if (moving == 0) { |
| 246 | if (value != 0) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 247 | printk(BIOS_DEBUG, "%s register %02lx(%08lx), " |
| 248 | "read-only ignoring it\n", |
| 249 | dev_path(dev), index, value); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 250 | } |
| 251 | resource->flags = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 252 | } else if (attr & PCI_BASE_ADDRESS_SPACE_IO) { |
| 253 | /* An I/O mapped base address. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 254 | attr &= PCI_BASE_ADDRESS_IO_ATTR_MASK; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 255 | resource->flags |= IORESOURCE_IO; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 256 | /* I don't want to deal with 32bit I/O resources. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 257 | resource->limit = 0xffff; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 258 | } else { |
| 259 | /* A Memory mapped base address. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 260 | attr &= PCI_BASE_ADDRESS_MEM_ATTR_MASK; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 261 | resource->flags |= IORESOURCE_MEM; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 262 | if (attr & PCI_BASE_ADDRESS_MEM_PREFETCH) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 263 | resource->flags |= IORESOURCE_PREFETCH; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 264 | attr &= PCI_BASE_ADDRESS_MEM_LIMIT_MASK; |
| 265 | if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_32) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 266 | /* 32bit limit. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 267 | resource->limit = 0xffffffffUL; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 268 | } else if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_1M) { |
| 269 | /* 1MB limit. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 270 | resource->limit = 0x000fffffUL; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 271 | } else if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_64) { |
| 272 | /* 64bit limit. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 273 | resource->limit = 0xffffffffffffffffULL; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 274 | resource->flags |= IORESOURCE_PCI64; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 275 | } else { |
| 276 | /* Invalid value. */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 277 | printk(BIOS_ERR, "Broken BAR with value %lx\n", attr); |
| 278 | printk(BIOS_ERR, " on dev %s at index %02lx\n", |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 279 | dev_path(dev), index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 280 | resource->flags = 0; |
| 281 | } |
| 282 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 283 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 284 | /* Don't let the limit exceed which bits can move. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 285 | if (resource->limit > limit) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 286 | resource->limit = limit; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 287 | |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 288 | return resource; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 289 | } |
| 290 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 291 | /** |
| 292 | * Given a device and an index, read the size of the BAR for that register. |
| 293 | * |
| 294 | * @param dev Pointer to the device structure. |
| 295 | * @param index Address of the PCI configuration register. |
| 296 | */ |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 297 | static void pci_get_rom_resource(struct device *dev, unsigned long index) |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 298 | { |
| 299 | struct resource *resource; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 300 | unsigned long value; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 301 | resource_t moving; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 302 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 303 | /* Initialize the resources to nothing. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 304 | resource = new_resource(dev, index); |
| 305 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 306 | /* Get the initial value. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 307 | value = pci_read_config32(dev, index); |
| 308 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 309 | /* See which bits move. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 310 | moving = pci_moving_config32(dev, index); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 311 | |
| 312 | /* Clear the Enable bit. */ |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 313 | moving = moving & ~PCI_ROM_ADDRESS_ENABLE; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 314 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 315 | /* Find the resource constraints. |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 316 | * Start by finding the bits that move. From there: |
| 317 | * - Size is the least significant bit of the bits that move. |
| 318 | * - Limit is all of the bits that move plus all of the lower bits. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 319 | * See PCI Spec 6.2.5.1. |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 320 | */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 321 | if (moving) { |
| 322 | resource->size = 1; |
| 323 | resource->align = resource->gran = 0; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 324 | while (!(moving & resource->size)) { |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 325 | resource->size <<= 1; |
| 326 | resource->align += 1; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 327 | resource->gran += 1; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 328 | } |
Patrick Georgi | 16cdbb2 | 2009-04-21 20:14:31 +0000 | [diff] [blame] | 329 | resource->limit = moving | (resource->size - 1); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 330 | resource->flags |= IORESOURCE_MEM | IORESOURCE_READONLY; |
| 331 | } else { |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 332 | if (value != 0) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 333 | printk(BIOS_DEBUG, "%s register %02lx(%08lx), " |
| 334 | "read-only ignoring it\n", |
| 335 | dev_path(dev), index, value); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 336 | } |
| 337 | resource->flags = 0; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 338 | } |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 339 | compact_resources(dev); |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 340 | } |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 341 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 342 | /** |
| 343 | * Read the base address registers for a given device. |
| 344 | * |
| 345 | * @param dev Pointer to the dev structure. |
| 346 | * @param howmany How many registers to read (6 for device, 2 for bridge). |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 347 | */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 348 | static void pci_read_bases(struct device *dev, unsigned int howmany) |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 349 | { |
| 350 | unsigned long index; |
| 351 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 352 | for (index = PCI_BASE_ADDRESS_0; |
| 353 | (index < PCI_BASE_ADDRESS_0 + (howmany << 2));) { |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 354 | struct resource *resource; |
| 355 | resource = pci_get_resource(dev, index); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 356 | index += (resource->flags & IORESOURCE_PCI64) ? 8 : 4; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 357 | } |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 358 | |
| 359 | compact_resources(dev); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 360 | } |
| 361 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 362 | static void pci_record_bridge_resource(struct device *dev, resource_t moving, |
| 363 | unsigned index, unsigned long type) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 364 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 365 | struct resource *resource; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 366 | unsigned long gran; |
| 367 | resource_t step; |
| 368 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 369 | resource = NULL; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 370 | |
| 371 | if (!moving) |
| 372 | return; |
| 373 | |
| 374 | /* Initialize the constraints on the current bus. */ |
| 375 | resource = new_resource(dev, index); |
| 376 | resource->size = 0; |
| 377 | gran = 0; |
| 378 | step = 1; |
| 379 | while ((moving & step) == 0) { |
| 380 | gran += 1; |
| 381 | step <<= 1; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 382 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 383 | resource->gran = gran; |
| 384 | resource->align = gran; |
| 385 | resource->limit = moving | (step - 1); |
| 386 | resource->flags = type | IORESOURCE_PCI_BRIDGE | |
| 387 | IORESOURCE_BRIDGE; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 388 | } |
| 389 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 390 | static void pci_bridge_read_bases(struct device *dev) |
| 391 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 392 | resource_t moving_base, moving_limit, moving; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 393 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 394 | /* See if the bridge I/O resources are implemented. */ |
| 395 | moving_base = ((u32) pci_moving_config8(dev, PCI_IO_BASE)) << 8; |
| 396 | moving_base |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 397 | ((u32) pci_moving_config16(dev, PCI_IO_BASE_UPPER16)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 398 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 399 | moving_limit = ((u32) pci_moving_config8(dev, PCI_IO_LIMIT)) << 8; |
| 400 | moving_limit |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 401 | ((u32) pci_moving_config16(dev, PCI_IO_LIMIT_UPPER16)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 402 | |
| 403 | moving = moving_base & moving_limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 404 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 405 | /* Initialize the I/O space constraints on the current bus. */ |
| 406 | pci_record_bridge_resource(dev, moving, PCI_IO_BASE, IORESOURCE_IO); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 407 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 408 | /* See if the bridge prefmem resources are implemented. */ |
| 409 | moving_base = |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 410 | ((resource_t) pci_moving_config16(dev, PCI_PREF_MEMORY_BASE)) << 16; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 411 | moving_base |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 412 | ((resource_t) pci_moving_config32(dev, PCI_PREF_BASE_UPPER32)) << 32; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 413 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 414 | moving_limit = |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 415 | ((resource_t) pci_moving_config16(dev, PCI_PREF_MEMORY_LIMIT)) << 16; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 416 | moving_limit |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 417 | ((resource_t) pci_moving_config32(dev, PCI_PREF_LIMIT_UPPER32)) << 32; |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 418 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 419 | moving = moving_base & moving_limit; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 420 | /* Initialize the prefetchable memory constraints on the current bus. */ |
| 421 | pci_record_bridge_resource(dev, moving, PCI_PREF_MEMORY_BASE, |
| 422 | IORESOURCE_MEM | IORESOURCE_PREFETCH); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 423 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 424 | /* See if the bridge mem resources are implemented. */ |
| 425 | moving_base = ((u32) pci_moving_config16(dev, PCI_MEMORY_BASE)) << 16; |
| 426 | moving_limit = ((u32) pci_moving_config16(dev, PCI_MEMORY_LIMIT)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 427 | |
| 428 | moving = moving_base & moving_limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 429 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 430 | /* Initialize the memory resources on the current bus. */ |
| 431 | pci_record_bridge_resource(dev, moving, PCI_MEMORY_BASE, |
| 432 | IORESOURCE_MEM); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 433 | |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 434 | compact_resources(dev); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 435 | } |
| 436 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 437 | void pci_dev_read_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 438 | { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 439 | pci_read_bases(dev, 6); |
| 440 | pci_get_rom_resource(dev, PCI_ROM_ADDRESS); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 441 | } |
| 442 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 443 | void pci_bus_read_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 444 | { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 445 | pci_bridge_read_bases(dev); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 446 | pci_read_bases(dev, 2); |
| 447 | pci_get_rom_resource(dev, PCI_ROM_ADDRESS1); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 448 | } |
| 449 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 450 | void pci_domain_read_resources(struct device *dev) |
| 451 | { |
| 452 | struct resource *res; |
| 453 | |
| 454 | /* Initialize the system-wide I/O space constraints. */ |
| 455 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); |
| 456 | res->limit = 0xffffUL; |
| 457 | res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | |
| 458 | IORESOURCE_ASSIGNED; |
| 459 | |
| 460 | /* Initialize the system-wide memory resources constraints. */ |
| 461 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); |
| 462 | res->limit = 0xffffffffULL; |
| 463 | res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | |
| 464 | IORESOURCE_ASSIGNED; |
| 465 | } |
| 466 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 467 | static void pci_set_resource(struct device *dev, struct resource *resource) |
| 468 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 469 | resource_t base, end; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 470 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 471 | /* Make certain the resource has actually been assigned a value. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 472 | if (!(resource->flags & IORESOURCE_ASSIGNED)) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 473 | printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010llx not " |
| 474 | "assigned\n", dev_path(dev), resource->index, |
| 475 | resource_type(resource), resource->size); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 476 | return; |
| 477 | } |
| 478 | |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 479 | /* If this resource is fixed don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 480 | if (resource->flags & IORESOURCE_FIXED) |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 481 | return; |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 482 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 483 | /* If I have already stored this resource don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 484 | if (resource->flags & IORESOURCE_STORED) |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 485 | return; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 486 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 487 | /* If the resource is subtractive don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 488 | if (resource->flags & IORESOURCE_SUBTRACTIVE) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 489 | return; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 490 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 491 | /* Only handle PCI memory and I/O resources for now. */ |
| 492 | if (!(resource->flags & (IORESOURCE_MEM | IORESOURCE_IO))) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 493 | return; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 494 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 495 | /* Enable the resources in the command register. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 496 | if (resource->size) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 497 | if (resource->flags & IORESOURCE_MEM) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 498 | dev->command |= PCI_COMMAND_MEMORY; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 499 | if (resource->flags & IORESOURCE_IO) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 500 | dev->command |= PCI_COMMAND_IO; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 501 | if (resource->flags & IORESOURCE_PCI_BRIDGE) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 502 | dev->command |= PCI_COMMAND_MASTER; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 503 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 504 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 505 | /* Get the base address. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 506 | base = resource->base; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 507 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 508 | /* Get the end. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 509 | end = resource_end(resource); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 510 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 511 | /* Now store the resource. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 512 | resource->flags |= IORESOURCE_STORED; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 513 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 514 | /* |
| 515 | * PCI bridges have no enable bit. They are disabled if the base of |
| 516 | * the range is greater than the limit. If the size is zero, disable |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 517 | * by setting the base = limit and end = limit - 2^gran. |
| 518 | */ |
| 519 | if (resource->size == 0 && (resource->flags & IORESOURCE_PCI_BRIDGE)) { |
| 520 | base = resource->limit; |
| 521 | end = resource->limit - (1 << resource->gran); |
| 522 | resource->base = base; |
| 523 | } |
| 524 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 525 | if (!(resource->flags & IORESOURCE_PCI_BRIDGE)) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 526 | unsigned long base_lo, base_hi; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 527 | |
| 528 | /* |
| 529 | * Some chipsets allow us to set/clear the I/O bit |
| 530 | * (e.g. VIA 82C686A). So set it to be safe. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 531 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 532 | base_lo = base & 0xffffffff; |
| 533 | base_hi = (base >> 32) & 0xffffffff; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 534 | if (resource->flags & IORESOURCE_IO) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 535 | base_lo |= PCI_BASE_ADDRESS_SPACE_IO; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 536 | pci_write_config32(dev, resource->index, base_lo); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 537 | if (resource->flags & IORESOURCE_PCI64) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 538 | pci_write_config32(dev, resource->index + 4, base_hi); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 539 | } else if (resource->index == PCI_IO_BASE) { |
| 540 | /* Set the I/O ranges. */ |
| 541 | pci_write_config8(dev, PCI_IO_BASE, base >> 8); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 542 | pci_write_config16(dev, PCI_IO_BASE_UPPER16, base >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 543 | pci_write_config8(dev, PCI_IO_LIMIT, end >> 8); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 544 | pci_write_config16(dev, PCI_IO_LIMIT_UPPER16, end >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 545 | } else if (resource->index == PCI_MEMORY_BASE) { |
| 546 | /* Set the memory range. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 547 | pci_write_config16(dev, PCI_MEMORY_BASE, base >> 16); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 548 | pci_write_config16(dev, PCI_MEMORY_LIMIT, end >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 549 | } else if (resource->index == PCI_PREF_MEMORY_BASE) { |
| 550 | /* Set the prefetchable memory range. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 551 | pci_write_config16(dev, PCI_PREF_MEMORY_BASE, base >> 16); |
| 552 | pci_write_config32(dev, PCI_PREF_BASE_UPPER32, base >> 32); |
| 553 | pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT, end >> 16); |
| 554 | pci_write_config32(dev, PCI_PREF_LIMIT_UPPER32, end >> 32); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 555 | } else { |
| 556 | /* Don't let me think I stored the resource. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 557 | resource->flags &= ~IORESOURCE_STORED; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 558 | printk(BIOS_ERR, "ERROR: invalid resource->index %lx\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 559 | resource->index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 560 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 561 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 562 | report_resource_stored(dev, resource, ""); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 563 | } |
| 564 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 565 | void pci_dev_set_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 566 | { |
Myles Watson | c25cc11 | 2010-05-21 14:33:48 +0000 | [diff] [blame] | 567 | struct resource *res; |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 568 | struct bus *bus; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 569 | u8 line; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 570 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 571 | for (res = dev->resource_list; res; res = res->next) |
Myles Watson | c25cc11 | 2010-05-21 14:33:48 +0000 | [diff] [blame] | 572 | pci_set_resource(dev, res); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 573 | |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 574 | for (bus = dev->link_list; bus; bus = bus->next) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 575 | if (bus->children) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 576 | assign_resources(bus); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 577 | } |
| 578 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 579 | /* Set a default latency timer. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 580 | pci_write_config8(dev, PCI_LATENCY_TIMER, 0x40); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 581 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 582 | /* Set a default secondary latency timer. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 583 | if ((dev->hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE) |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 584 | pci_write_config8(dev, PCI_SEC_LATENCY_TIMER, 0x40); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 585 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 586 | /* Zero the IRQ settings. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 587 | line = pci_read_config8(dev, PCI_INTERRUPT_PIN); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 588 | if (line) |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 589 | pci_write_config8(dev, PCI_INTERRUPT_LINE, 0); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 590 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 591 | /* Set the cache line size, so far 64 bytes is good for everyone. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 592 | pci_write_config8(dev, PCI_CACHE_LINE_SIZE, 64 >> 2); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 593 | } |
| 594 | |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 595 | void pci_dev_enable_resources(struct device *dev) |
| 596 | { |
Eric Biederman | a9e632c | 2004-11-18 22:38:08 +0000 | [diff] [blame] | 597 | const struct pci_operations *ops; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 598 | u16 command; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 599 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 600 | /* Set the subsystem vendor and device ID for mainboard devices. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 601 | ops = ops_pci(dev); |
Eric Biederman | dbec2d4 | 2004-10-21 10:44:08 +0000 | [diff] [blame] | 602 | if (dev->on_mainboard && ops && ops->set_subsystem) { |
Duncan Laurie | 7e1c83e | 2013-08-09 07:55:10 -0700 | [diff] [blame] | 603 | if (CONFIG_SUBSYSTEM_VENDOR_ID) |
| 604 | dev->subsystem_vendor = CONFIG_SUBSYSTEM_VENDOR_ID; |
| 605 | if (CONFIG_SUBSYSTEM_DEVICE_ID) |
| 606 | dev->subsystem_device = CONFIG_SUBSYSTEM_DEVICE_ID; |
Sven Schnelle | 9132102 | 2011-03-01 19:58:47 +0000 | [diff] [blame] | 607 | printk(BIOS_DEBUG, "%s subsystem <- %04x/%04x\n", |
| 608 | dev_path(dev), dev->subsystem_vendor, |
| 609 | dev->subsystem_device); |
| 610 | ops->set_subsystem(dev, dev->subsystem_vendor, |
| 611 | dev->subsystem_device); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 612 | } |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 613 | command = pci_read_config16(dev, PCI_COMMAND); |
| 614 | command |= dev->command; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 615 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 616 | /* v3 has |
| 617 | * command |= (PCI_COMMAND_PARITY + PCI_COMMAND_SERR); // Error check. |
| 618 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 619 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 620 | printk(BIOS_DEBUG, "%s cmd <- %02x\n", dev_path(dev), command); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 621 | pci_write_config16(dev, PCI_COMMAND, command); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | void pci_bus_enable_resources(struct device *dev) |
| 625 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 626 | u16 ctrl; |
| 627 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 628 | /* |
| 629 | * Enable I/O in command register if there is VGA card |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 630 | * connected with (even it does not claim I/O resource). |
| 631 | */ |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 632 | if (dev->link_list->bridge_ctrl & PCI_BRIDGE_CTL_VGA) |
Li-Ta Lo | 515f6c7 | 2005-01-11 22:48:54 +0000 | [diff] [blame] | 633 | dev->command |= PCI_COMMAND_IO; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 634 | ctrl = pci_read_config16(dev, PCI_BRIDGE_CONTROL); |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 635 | ctrl |= dev->link_list->bridge_ctrl; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 636 | ctrl |= (PCI_BRIDGE_CTL_PARITY + PCI_BRIDGE_CTL_SERR); /* Error check. */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 637 | printk(BIOS_DEBUG, "%s bridge ctrl <- %04x\n", dev_path(dev), ctrl); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 638 | pci_write_config16(dev, PCI_BRIDGE_CONTROL, ctrl); |
| 639 | |
| 640 | pci_dev_enable_resources(dev); |
| 641 | } |
| 642 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 643 | void pci_bus_reset(struct bus *bus) |
| 644 | { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 645 | u16 ctl; |
| 646 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 647 | ctl = pci_read_config16(bus->dev, PCI_BRIDGE_CONTROL); |
| 648 | ctl |= PCI_BRIDGE_CTL_BUS_RESET; |
| 649 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, ctl); |
| 650 | mdelay(10); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 651 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 652 | ctl &= ~PCI_BRIDGE_CTL_BUS_RESET; |
| 653 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, ctl); |
| 654 | delay(1); |
| 655 | } |
| 656 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 657 | void pci_dev_set_subsystem(struct device *dev, unsigned vendor, unsigned device) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 658 | { |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 659 | pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 660 | ((device & 0xffff) << 16) | (vendor & 0xffff)); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 661 | } |
| 662 | |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 663 | #if CONFIG_VGA_ROM_RUN |
| 664 | static int should_run_oprom(struct device *dev) |
| 665 | { |
| 666 | static int should_run = -1; |
| 667 | |
| 668 | if (should_run >= 0) |
| 669 | return should_run; |
| 670 | |
Kyösti Mälkki | 9ab1c10 | 2013-12-22 00:22:49 +0200 | [diff] [blame] | 671 | /* Don't run VGA option ROMs, unless we have to print |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 672 | * something on the screen before the kernel is loaded. |
| 673 | */ |
Kyösti Mälkki | 9ab1c10 | 2013-12-22 00:22:49 +0200 | [diff] [blame] | 674 | should_run = !IS_ENABLED(CONFIG_BOOTMODE_STRAPS) || |
| 675 | developer_mode_enabled() || recovery_mode_enabled(); |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 676 | |
Kyösti Mälkki | 9ab1c10 | 2013-12-22 00:22:49 +0200 | [diff] [blame] | 677 | #if CONFIG_CHROMEOS |
| 678 | if (!should_run) |
| 679 | should_run = vboot_wants_oprom(); |
| 680 | #endif |
| 681 | if (!should_run) |
| 682 | printk(BIOS_DEBUG, "Not running VGA Option ROM\n"); |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 683 | return should_run; |
| 684 | } |
| 685 | |
| 686 | static int should_load_oprom(struct device *dev) |
| 687 | { |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 688 | /* If S3_VGA_ROM_RUN is disabled, skip running VGA option |
| 689 | * ROMs when coming out of an S3 resume. |
| 690 | */ |
Kyösti Mälkki | 58ceb00 | 2014-06-20 06:21:01 +0300 | [diff] [blame] | 691 | if (!IS_ENABLED(CONFIG_S3_VGA_ROM_RUN) && acpi_is_wakeup_s3() && |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 692 | ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)) |
| 693 | return 0; |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 694 | if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM)) |
| 695 | return 1; |
| 696 | if (should_run_oprom(dev)) |
| 697 | return 1; |
| 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | #endif /* CONFIG_VGA_ROM_RUN */ |
| 702 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 703 | /** Default handler: only runs the relevant PCI BIOS. */ |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 704 | void pci_dev_init(struct device *dev) |
| 705 | { |
Vladimir Serbinenko | b32816e | 2013-12-20 17:47:19 +0100 | [diff] [blame] | 706 | #if CONFIG_VGA_ROM_RUN |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 707 | struct rom_header *rom, *ram; |
| 708 | |
Vladimir Serbinenko | b32816e | 2013-12-20 17:47:19 +0100 | [diff] [blame] | 709 | /* Only execute VGA ROMs. */ |
| 710 | if (((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)) |
Myles Watson | 17aeeca | 2009-10-07 18:41:08 +0000 | [diff] [blame] | 711 | return; |
Roman Kononov | 778a42b | 2007-04-06 18:34:39 +0000 | [diff] [blame] | 712 | |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 713 | if (!should_load_oprom(dev)) |
Stefan Reinauer | 74a0efe | 2012-03-30 17:10:49 -0700 | [diff] [blame] | 714 | return; |
Aaron Durbin | ce872cb | 2013-03-28 15:59:19 -0500 | [diff] [blame] | 715 | |
| 716 | rom = pci_rom_probe(dev); |
| 717 | if (rom == NULL) |
| 718 | return; |
| 719 | |
| 720 | ram = pci_rom_load(dev, rom); |
| 721 | if (ram == NULL) |
| 722 | return; |
| 723 | |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 724 | if (!should_run_oprom(dev)) |
| 725 | return; |
| 726 | |
Stefan Reinauer | d98cf5b | 2008-08-01 11:25:41 +0000 | [diff] [blame] | 727 | run_bios(dev, (unsigned long)ram); |
Kyösti Mälkki | ab56b3b | 2013-11-28 16:44:51 +0200 | [diff] [blame] | 728 | gfx_set_init_done(1); |
| 729 | printk(BIOS_DEBUG, "VGA Option ROM was run\n"); |
Vladimir Serbinenko | b32816e | 2013-12-20 17:47:19 +0100 | [diff] [blame] | 730 | #endif /* CONFIG_VGA_ROM_RUN */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 731 | } |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 732 | |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 733 | /** Default device operation for PCI devices */ |
Eric Biederman | a9e632c | 2004-11-18 22:38:08 +0000 | [diff] [blame] | 734 | static struct pci_operations pci_dev_ops_pci = { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 735 | .set_subsystem = pci_dev_set_subsystem, |
| 736 | }; |
| 737 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 738 | struct device_operations default_pci_ops_dev = { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 739 | .read_resources = pci_dev_read_resources, |
| 740 | .set_resources = pci_dev_set_resources, |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 741 | .enable_resources = pci_dev_enable_resources, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 742 | .init = pci_dev_init, |
| 743 | .scan_bus = 0, |
| 744 | .enable = 0, |
| 745 | .ops_pci = &pci_dev_ops_pci, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 746 | }; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 747 | |
| 748 | /** Default device operations for PCI bridges */ |
Eric Biederman | a9e632c | 2004-11-18 22:38:08 +0000 | [diff] [blame] | 749 | static struct pci_operations pci_bus_ops_pci = { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 750 | .set_subsystem = 0, |
| 751 | }; |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 752 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 753 | struct device_operations default_pci_ops_bus = { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 754 | .read_resources = pci_bus_read_resources, |
| 755 | .set_resources = pci_dev_set_resources, |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 756 | .enable_resources = pci_bus_enable_resources, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 757 | .init = 0, |
| 758 | .scan_bus = pci_scan_bridge, |
| 759 | .enable = 0, |
| 760 | .reset_bus = pci_bus_reset, |
| 761 | .ops_pci = &pci_bus_ops_pci, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 762 | }; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 763 | |
| 764 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 765 | * Detect the type of downstream bridge. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 766 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 767 | * This function is a heuristic to detect which type of bus is downstream |
| 768 | * of a PCI-to-PCI bridge. This functions by looking for various capability |
| 769 | * blocks to figure out the type of downstream bridge. PCI-X, PCI-E, and |
| 770 | * Hypertransport all seem to have appropriate capabilities. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 771 | * |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 772 | * When only a PCI-Express capability is found the type is examined to see |
| 773 | * which type of bridge we have. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 774 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 775 | * @param dev Pointer to the device structure of the bridge. |
| 776 | * @return Appropriate bridge operations. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 777 | */ |
| 778 | static struct device_operations *get_pci_bridge_ops(device_t dev) |
| 779 | { |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 780 | #if CONFIG_PCIX_PLUGIN_SUPPORT |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 781 | unsigned int pcixpos; |
| 782 | pcixpos = pci_find_capability(dev, PCI_CAP_ID_PCIX); |
| 783 | if (pcixpos) { |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 784 | printk(BIOS_DEBUG, "%s subordinate bus PCI-X\n", dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 785 | return &default_pcix_ops_bus; |
| 786 | } |
| 787 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 788 | #if CONFIG_AGP_PLUGIN_SUPPORT |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 789 | /* How do I detect a PCI to AGP bridge? */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 790 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 791 | #if CONFIG_HYPERTRANSPORT_PLUGIN_SUPPORT |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 792 | unsigned int htpos = 0; |
| 793 | while ((htpos = pci_find_next_capability(dev, PCI_CAP_ID_HT, htpos))) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 794 | u16 flags; |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 795 | flags = pci_read_config16(dev, htpos + PCI_CAP_FLAGS); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 796 | if ((flags >> 13) == 1) { |
| 797 | /* Host or Secondary Interface */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 798 | printk(BIOS_DEBUG, "%s subordinate bus HT\n", |
| 799 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 800 | return &default_ht_ops_bus; |
| 801 | } |
| 802 | } |
| 803 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 804 | #if CONFIG_PCIEXP_PLUGIN_SUPPORT |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 805 | unsigned int pciexpos; |
| 806 | pciexpos = pci_find_capability(dev, PCI_CAP_ID_PCIE); |
| 807 | if (pciexpos) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 808 | u16 flags; |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 809 | flags = pci_read_config16(dev, pciexpos + PCI_EXP_FLAGS); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 810 | switch ((flags & PCI_EXP_FLAGS_TYPE) >> 4) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 811 | case PCI_EXP_TYPE_ROOT_PORT: |
| 812 | case PCI_EXP_TYPE_UPSTREAM: |
| 813 | case PCI_EXP_TYPE_DOWNSTREAM: |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 814 | printk(BIOS_DEBUG, "%s subordinate bus PCI Express\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 815 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 816 | return &default_pciexp_ops_bus; |
| 817 | case PCI_EXP_TYPE_PCI_BRIDGE: |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 818 | printk(BIOS_DEBUG, "%s subordinate PCI\n", |
| 819 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 820 | return &default_pci_ops_bus; |
| 821 | default: |
| 822 | break; |
| 823 | } |
| 824 | } |
| 825 | #endif |
| 826 | return &default_pci_ops_bus; |
| 827 | } |
| 828 | |
| 829 | /** |
Vadim Bendebury | 8049fc9 | 2012-04-24 12:53:19 -0700 | [diff] [blame] | 830 | * Check if a device id matches a PCI driver entry. |
| 831 | * |
| 832 | * The driver entry can either point at a zero terminated array of acceptable |
| 833 | * device IDs, or include a single device ID. |
| 834 | * |
| 835 | * @driver pointer to the PCI driver entry being checked |
| 836 | * @device_id PCI device ID of the device being matched |
| 837 | */ |
| 838 | static int device_id_match(struct pci_driver *driver, unsigned short device_id) |
| 839 | { |
| 840 | if (driver->devices) { |
| 841 | unsigned short check_id; |
| 842 | const unsigned short *device_list = driver->devices; |
| 843 | while ((check_id = *device_list++) != 0) |
| 844 | if (check_id == device_id) |
| 845 | return 1; |
| 846 | } |
| 847 | |
| 848 | return (driver->device == device_id); |
| 849 | } |
| 850 | |
| 851 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 852 | * Set up PCI device operation. |
| 853 | * |
| 854 | * Check if it already has a driver. If not, use find_device_operations(), |
| 855 | * or set to a default based on type. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 856 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 857 | * @param dev Pointer to the device whose pci_ops you want to set. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 858 | * @see pci_drivers |
| 859 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 860 | static void set_pci_ops(struct device *dev) |
| 861 | { |
| 862 | struct pci_driver *driver; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 863 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 864 | if (dev->ops) |
| 865 | return; |
| 866 | |
| 867 | /* |
| 868 | * Look through the list of setup drivers and find one for |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 869 | * this PCI device. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 870 | */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 871 | for (driver = &pci_drivers[0]; driver != &epci_drivers[0]; driver++) { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 872 | if ((driver->vendor == dev->vendor) && |
Vadim Bendebury | 8049fc9 | 2012-04-24 12:53:19 -0700 | [diff] [blame] | 873 | device_id_match(driver, dev->device)) { |
Uwe Hermann | 312673c | 2009-10-27 21:49:33 +0000 | [diff] [blame] | 874 | dev->ops = (struct device_operations *)driver->ops; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 875 | printk(BIOS_SPEW, "%s [%04x/%04x] %sops\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 876 | dev_path(dev), driver->vendor, driver->device, |
| 877 | (driver->ops->scan_bus ? "bus " : "")); |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 878 | return; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 879 | } |
| 880 | } |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 881 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 882 | /* If I don't have a specific driver use the default operations. */ |
| 883 | switch (dev->hdr_type & 0x7f) { /* Header type */ |
| 884 | case PCI_HEADER_TYPE_NORMAL: |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 885 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) |
| 886 | goto bad; |
| 887 | dev->ops = &default_pci_ops_dev; |
| 888 | break; |
| 889 | case PCI_HEADER_TYPE_BRIDGE: |
| 890 | if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) |
| 891 | goto bad; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 892 | dev->ops = get_pci_bridge_ops(dev); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 893 | break; |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 894 | #if CONFIG_CARDBUS_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 895 | case PCI_HEADER_TYPE_CARDBUS: |
| 896 | dev->ops = &default_cardbus_ops_bus; |
| 897 | break; |
| 898 | #endif |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 899 | default: |
| 900 | bad: |
Li-Ta Lo | 69c5a90 | 2004-04-29 20:08:54 +0000 | [diff] [blame] | 901 | if (dev->enabled) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 902 | printk(BIOS_ERR, "%s [%04x/%04x/%06x] has unknown " |
| 903 | "header type %02x, ignoring.\n", dev_path(dev), |
| 904 | dev->vendor, dev->device, |
| 905 | dev->class >> 8, dev->hdr_type); |
Eric Biederman | 83b991a | 2003-10-11 06:20:25 +0000 | [diff] [blame] | 906 | } |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 907 | } |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 908 | } |
| 909 | |
| 910 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 911 | * See if we have already allocated a device structure for a given devfn. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 912 | * |
| 913 | * Given a linked list of PCI device structures and a devfn number, find the |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 914 | * device structure correspond to the devfn, if present. This function also |
| 915 | * removes the device structure from the linked list. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 916 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 917 | * @param list The device structure list. |
| 918 | * @param devfn A device/function number. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 919 | * @return Pointer to the device structure found or NULL if we have not |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 920 | * allocated a device for this devfn yet. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 921 | */ |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 922 | static struct device *pci_scan_get_dev(struct device **list, unsigned int devfn) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 923 | { |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 924 | struct device *dev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 925 | |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 926 | dev = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 927 | for (; *list; list = &(*list)->sibling) { |
Eric Biederman | ad1b35a | 2003-10-14 02:36:51 +0000 | [diff] [blame] | 928 | if ((*list)->path.type != DEVICE_PATH_PCI) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 929 | printk(BIOS_ERR, "child %s not a PCI device\n", |
| 930 | dev_path(*list)); |
Eric Biederman | ad1b35a | 2003-10-14 02:36:51 +0000 | [diff] [blame] | 931 | continue; |
| 932 | } |
Stefan Reinauer | 2b34db8 | 2009-02-28 20:10:20 +0000 | [diff] [blame] | 933 | if ((*list)->path.pci.devfn == devfn) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 934 | /* Unlink from the list. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 935 | dev = *list; |
| 936 | *list = (*list)->sibling; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 937 | dev->sibling = NULL; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 938 | break; |
| 939 | } |
| 940 | } |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 941 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 942 | /* |
| 943 | * Just like alloc_dev() add the device to the list of devices on the |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 944 | * bus. When the list of devices was formed we removed all of the |
| 945 | * parents children, and now we are interleaving static and dynamic |
| 946 | * devices in order on the bus. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 947 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 948 | if (dev) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 949 | struct device *child; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 950 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 951 | /* Find the last child of our parent. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 952 | for (child = dev->bus->children; child && child->sibling;) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 953 | child = child->sibling; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 954 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 955 | /* Place the device on the list of children of its parent. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 956 | if (child) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 957 | child->sibling = dev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 958 | else |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 959 | dev->bus->children = dev; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 960 | } |
| 961 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 962 | return dev; |
| 963 | } |
| 964 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 965 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 966 | * Scan a PCI bus. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 967 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 968 | * Determine the existence of a given PCI device. Allocate a new struct device |
| 969 | * if dev==NULL was passed in and the device exists in hardware. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 970 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 971 | * @param dev Pointer to the dev structure. |
| 972 | * @param bus Pointer to the bus structure. |
| 973 | * @param devfn A device/function number to look at. |
| 974 | * @return The device structure for the device (if found), NULL otherwise. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 975 | */ |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 976 | device_t pci_probe_dev(device_t dev, struct bus *bus, unsigned devfn) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 977 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 978 | u32 id, class; |
| 979 | u8 hdr_type; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 980 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 981 | /* Detect if a device is present. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 982 | if (!dev) { |
| 983 | struct device dummy; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 984 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 985 | dummy.bus = bus; |
| 986 | dummy.path.type = DEVICE_PATH_PCI; |
Stefan Reinauer | 2b34db8 | 2009-02-28 20:10:20 +0000 | [diff] [blame] | 987 | dummy.path.pci.devfn = devfn; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 988 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 989 | id = pci_read_config32(&dummy, PCI_VENDOR_ID); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 990 | /* |
| 991 | * Have we found something? Some broken boards return 0 if a |
| 992 | * slot is empty, but the expected answer is 0xffffffff. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 993 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 994 | if (id == 0xffffffff) |
Stefan Reinauer | 7355c75 | 2010-04-02 16:30:25 +0000 | [diff] [blame] | 995 | return NULL; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 996 | |
Stefan Reinauer | 7355c75 | 2010-04-02 16:30:25 +0000 | [diff] [blame] | 997 | if ((id == 0x00000000) || (id == 0x0000ffff) || |
| 998 | (id == 0xffff0000)) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 999 | printk(BIOS_SPEW, "%s, bad id 0x%x\n", |
| 1000 | dev_path(&dummy), id); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1001 | return NULL; |
| 1002 | } |
| 1003 | dev = alloc_dev(bus, &dummy.path); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1004 | } else { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1005 | /* |
| 1006 | * Enable/disable the device. Once we have found the device- |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1007 | * specific operations this operations we will disable the |
| 1008 | * device with those as well. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1009 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1010 | * This is geared toward devices that have subfunctions |
| 1011 | * that do not show up by default. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1012 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1013 | * If a device is a stuff option on the motherboard |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1014 | * it may be absent and enable_dev() must cope. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1015 | */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1016 | /* Run the magic enable sequence for the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1017 | if (dev->chip_ops && dev->chip_ops->enable_dev) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1018 | dev->chip_ops->enable_dev(dev); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1019 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1020 | /* Now read the vendor and device ID. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1021 | id = pci_read_config32(dev, PCI_VENDOR_ID); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1022 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1023 | /* |
| 1024 | * If the device does not have a PCI ID disable it. Possibly |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1025 | * this is because we have already disabled the device. But |
| 1026 | * this also handles optional devices that may not always |
| 1027 | * show up. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1028 | */ |
| 1029 | /* If the chain is fully enumerated quit */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1030 | if ((id == 0xffffffff) || (id == 0x00000000) || |
| 1031 | (id == 0x0000ffff) || (id == 0xffff0000)) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1032 | if (dev->enabled) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1033 | printk(BIOS_INFO, "PCI: Static device %s not " |
| 1034 | "found, disabling it.\n", dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1035 | dev->enabled = 0; |
| 1036 | } |
| 1037 | return dev; |
| 1038 | } |
| 1039 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1040 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1041 | /* Read the rest of the PCI configuration information. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1042 | hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE); |
| 1043 | class = pci_read_config32(dev, PCI_CLASS_REVISION); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1044 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1045 | /* Store the interesting information in the device structure. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1046 | dev->vendor = id & 0xffff; |
| 1047 | dev->device = (id >> 16) & 0xffff; |
| 1048 | dev->hdr_type = hdr_type; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1049 | |
| 1050 | /* Class code, the upper 3 bytes of PCI_CLASS_REVISION. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1051 | dev->class = class >> 8; |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1052 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1053 | /* Architectural/System devices always need to be bus masters. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1054 | if ((dev->class >> 16) == PCI_BASE_CLASS_SYSTEM) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1055 | dev->command |= PCI_COMMAND_MASTER; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1056 | |
| 1057 | /* |
| 1058 | * Look at the vendor and device ID, or at least the header type and |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1059 | * class and figure out which set of configuration methods to use. |
| 1060 | * Unless we already have some PCI ops. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1061 | */ |
| 1062 | set_pci_ops(dev); |
| 1063 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1064 | /* Now run the magic enable/disable sequence for the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1065 | if (dev->ops && dev->ops->enable) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1066 | dev->ops->enable(dev); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1067 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1068 | /* Display the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1069 | printk(BIOS_DEBUG, "%s [%04x/%04x] %s%s\n", dev_path(dev), |
| 1070 | dev->vendor, dev->device, dev->enabled ? "enabled" : "disabled", |
| 1071 | dev->ops ? "" : " No operations"); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1072 | |
| 1073 | return dev; |
| 1074 | } |
| 1075 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1076 | /** |
Kyösti Mälkki | c73acdb | 2013-06-15 17:16:56 +0300 | [diff] [blame] | 1077 | * Test for match between romstage and ramstage device instance. |
| 1078 | * |
| 1079 | * @param dev Pointer to the device structure. |
| 1080 | * @param sdev Simple device model identifier, created with PCI_DEV(). |
| 1081 | * @return Non-zero if bus:dev.fn of device matches. |
| 1082 | */ |
| 1083 | unsigned int pci_match_simple_dev(device_t dev, pci_devfn_t sdev) |
| 1084 | { |
| 1085 | return dev->bus->secondary == PCI_DEV2SEGBUS(sdev) && |
| 1086 | dev->path.pci.devfn == PCI_DEV2DEVFN(sdev); |
| 1087 | } |
| 1088 | |
| 1089 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1090 | * Scan a PCI bus. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1091 | * |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1092 | * Determine the existence of devices and bridges on a PCI bus. If there are |
| 1093 | * bridges on the bus, recursively scan the buses behind the bridges. |
| 1094 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1095 | * This function is the default scan_bus() method for the root device |
| 1096 | * 'dev_root'. |
| 1097 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1098 | * @param bus Pointer to the bus structure. |
| 1099 | * @param min_devfn Minimum devfn to look at in the scan, usually 0x00. |
| 1100 | * @param max_devfn Maximum devfn to look at in the scan, usually 0xff. |
| 1101 | * @param max Current bus number. |
| 1102 | * @return The maximum bus number found, after scanning all subordinate busses. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1103 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1104 | unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn, |
| 1105 | unsigned max_devfn, unsigned int max) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1106 | { |
| 1107 | unsigned int devfn; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1108 | struct device *old_devices; |
| 1109 | struct device *child; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1110 | |
Stefan Reinauer | 0867062 | 2009-06-30 15:17:49 +0000 | [diff] [blame] | 1111 | #if CONFIG_PCI_BUS_SEGN_BITS |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1112 | printk(BIOS_DEBUG, "PCI: pci_scan_bus for bus %04x:%02x\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1113 | bus->secondary >> 8, bus->secondary & 0xff); |
Yinghai Lu | 5f9624d | 2006-10-04 22:56:21 +0000 | [diff] [blame] | 1114 | #else |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1115 | printk(BIOS_DEBUG, "PCI: pci_scan_bus for bus %02x\n", bus->secondary); |
Yinghai Lu | 5f9624d | 2006-10-04 22:56:21 +0000 | [diff] [blame] | 1116 | #endif |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1117 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1118 | /* Maximum sane devfn is 0xFF. */ |
Juhana Helovuo | 50b78b6 | 2010-09-13 14:43:02 +0000 | [diff] [blame] | 1119 | if (max_devfn > 0xff) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1120 | printk(BIOS_ERR, "PCI: pci_scan_bus limits devfn %x - " |
| 1121 | "devfn %x\n", min_devfn, max_devfn); |
| 1122 | printk(BIOS_ERR, "PCI: pci_scan_bus upper limit too big. " |
| 1123 | "Using 0xff.\n"); |
Juhana Helovuo | 50b78b6 | 2010-09-13 14:43:02 +0000 | [diff] [blame] | 1124 | max_devfn=0xff; |
| 1125 | } |
| 1126 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1127 | old_devices = bus->children; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1128 | bus->children = NULL; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1129 | |
| 1130 | post_code(0x24); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1131 | |
| 1132 | /* |
| 1133 | * Probe all devices/functions on this bus with some optimization for |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1134 | * non-existence and single function devices. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1135 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1136 | for (devfn = min_devfn; devfn <= max_devfn; devfn++) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1137 | struct device *dev; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1138 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1139 | /* First thing setup the device structure. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1140 | dev = pci_scan_get_dev(&old_devices, devfn); |
Li-Ta Lo | 9782f75 | 2004-05-05 21:15:42 +0000 | [diff] [blame] | 1141 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1142 | /* See if a device is present and setup the device structure. */ |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1143 | dev = pci_probe_dev(dev, bus, devfn); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 1144 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1145 | /* |
| 1146 | * If this is not a multi function device, or the device is |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1147 | * not present don't waste time probing another function. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1148 | * Skip to next device. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1149 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1150 | if ((PCI_FUNC(devfn) == 0x00) && (!dev |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1151 | || (dev->enabled && ((dev->hdr_type & 0x80) != 0x80)))) { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1152 | devfn += 0x07; |
| 1153 | } |
| 1154 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1155 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1156 | post_code(0x25); |
| 1157 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1158 | /* |
| 1159 | * Warn if any leftover static devices are are found. |
| 1160 | * There's probably a problem in devicetree.cb. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1161 | */ |
| 1162 | if (old_devices) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1163 | device_t left; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1164 | printk(BIOS_WARNING, "PCI: Left over static devices:\n"); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1165 | for (left = old_devices; left; left = left->sibling) |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1166 | printk(BIOS_WARNING, "%s\n", dev_path(left)); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1167 | |
| 1168 | printk(BIOS_WARNING, "PCI: Check your devicetree.cb.\n"); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1169 | } |
| 1170 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1171 | /* |
| 1172 | * For all children that implement scan_bus() (i.e. bridges) |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1173 | * scan the bus behind that child. |
| 1174 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1175 | for (child = bus->children; child; child = child->sibling) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1176 | max = scan_bus(child, max); |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1177 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1178 | /* |
| 1179 | * We've scanned the bus and so we know all about what's on the other |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1180 | * side of any bridges that may be on this bus plus any devices. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1181 | * Return how far we've got finding sub-buses. |
| 1182 | */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1183 | printk(BIOS_DEBUG, "PCI: pci_scan_bus returning with max=%03x\n", max); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1184 | post_code(0x55); |
| 1185 | return max; |
| 1186 | } |
| 1187 | |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1188 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1189 | * Scan a PCI bridge and the buses behind the bridge. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1190 | * |
| 1191 | * Determine the existence of buses behind the bridge. Set up the bridge |
| 1192 | * according to the result of the scan. |
| 1193 | * |
| 1194 | * This function is the default scan_bus() method for PCI bridge devices. |
| 1195 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1196 | * @param dev Pointer to the bridge device. |
| 1197 | * @param max The highest bus number assigned up to now. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1198 | * @param do_scan_bus TODO |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1199 | * @return The maximum bus number found, after scanning all subordinate buses. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1200 | */ |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1201 | unsigned int do_pci_scan_bridge(struct device *dev, unsigned int max, |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1202 | unsigned int (*do_scan_bus) (struct bus * bus, |
| 1203 | unsigned min_devfn, |
| 1204 | unsigned max_devfn, |
| 1205 | unsigned int max)) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1206 | { |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1207 | struct bus *bus; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1208 | u32 buses; |
| 1209 | u16 cr; |
Eric Biederman | 83b991a | 2003-10-11 06:20:25 +0000 | [diff] [blame] | 1210 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1211 | printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(dev)); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1212 | |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 1213 | if (dev->link_list == NULL) { |
| 1214 | struct bus *link; |
| 1215 | link = malloc(sizeof(*link)); |
| 1216 | if (link == NULL) |
| 1217 | die("Couldn't allocate a link!\n"); |
| 1218 | memset(link, 0, sizeof(*link)); |
| 1219 | link->dev = dev; |
| 1220 | dev->link_list = link; |
| 1221 | } |
| 1222 | |
| 1223 | bus = dev->link_list; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1224 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1225 | /* |
| 1226 | * Set up the primary, secondary and subordinate bus numbers. We have |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1227 | * no idea how many buses are behind this bridge yet, so we set the |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1228 | * subordinate bus number to 0xff for the moment. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1229 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1230 | bus->secondary = ++max; |
| 1231 | bus->subordinate = 0xff; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1232 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1233 | /* Clear all status bits and turn off memory, I/O and master enables. */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1234 | cr = pci_read_config16(dev, PCI_COMMAND); |
| 1235 | pci_write_config16(dev, PCI_COMMAND, 0x0000); |
| 1236 | pci_write_config16(dev, PCI_STATUS, 0xffff); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1237 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1238 | /* |
| 1239 | * Read the existing primary/secondary/subordinate bus |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1240 | * number configuration. |
| 1241 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1242 | buses = pci_read_config32(dev, PCI_PRIMARY_BUS); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1243 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1244 | /* |
| 1245 | * Configure the bus numbers for this bridge: the configuration |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1246 | * transactions will not be propagated by the bridge if it is not |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1247 | * correctly configured. |
| 1248 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1249 | buses &= 0xff000000; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1250 | buses |= (((unsigned int)(dev->bus->secondary) << 0) | |
| 1251 | ((unsigned int)(bus->secondary) << 8) | |
| 1252 | ((unsigned int)(bus->subordinate) << 16)); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1253 | pci_write_config32(dev, PCI_PRIMARY_BUS, buses); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1254 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1255 | /* Now we can scan all subordinate buses (those behind the bridge). */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1256 | max = do_scan_bus(bus, 0x00, 0xff, max); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1257 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1258 | /* |
| 1259 | * We know the number of buses behind this bridge. Set the subordinate |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1260 | * bus number to its real value. |
| 1261 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1262 | bus->subordinate = max; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1263 | buses = (buses & 0xff00ffff) | ((unsigned int)(bus->subordinate) << 16); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1264 | pci_write_config32(dev, PCI_PRIMARY_BUS, buses); |
| 1265 | pci_write_config16(dev, PCI_COMMAND, cr); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1266 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1267 | printk(BIOS_SPEW, "%s returns max %d\n", __func__, max); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1268 | return max; |
| 1269 | } |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1270 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1271 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1272 | * Scan a PCI bridge and the buses behind the bridge. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1273 | * |
| 1274 | * Determine the existence of buses behind the bridge. Set up the bridge |
| 1275 | * according to the result of the scan. |
| 1276 | * |
| 1277 | * This function is the default scan_bus() method for PCI bridge devices. |
| 1278 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1279 | * @param dev Pointer to the bridge device. |
| 1280 | * @param max The highest bus number assigned up to now. |
| 1281 | * @return The maximum bus number found, after scanning all subordinate buses. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1282 | */ |
| 1283 | unsigned int pci_scan_bridge(struct device *dev, unsigned int max) |
| 1284 | { |
| 1285 | return do_pci_scan_bridge(dev, max, pci_scan_bus); |
| 1286 | } |
| 1287 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1288 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1289 | * Scan a PCI domain. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1290 | * |
| 1291 | * This function is the default scan_bus() method for PCI domains. |
| 1292 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1293 | * @param dev Pointer to the domain. |
| 1294 | * @param max The highest bus number assigned up to now. |
| 1295 | * @return The maximum bus number found, after scanning all subordinate busses. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1296 | */ |
| 1297 | unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) |
| 1298 | { |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 1299 | max = pci_scan_bus(dev->link_list, PCI_DEVFN(0, 0), 0xff, max); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1300 | return max; |
| 1301 | } |
| 1302 | |
Mike Loptien | 0f5cf5e | 2014-05-12 21:46:31 -0600 | [diff] [blame] | 1303 | /** |
| 1304 | * Take an INT_PIN number (0, 1 - 4) and convert |
| 1305 | * it to a string ("NO PIN", "PIN A" - "PIN D") |
| 1306 | * |
| 1307 | * @param pin PCI Interrupt Pin number (0, 1 - 4) |
| 1308 | * @return A string corresponding to the pin number or "Invalid" |
| 1309 | */ |
| 1310 | const char *pin_to_str(int pin) |
| 1311 | { |
| 1312 | const char *str[5] = { |
| 1313 | "NO PIN", |
| 1314 | "PIN A", |
| 1315 | "PIN B", |
| 1316 | "PIN C", |
| 1317 | "PIN D", |
| 1318 | }; |
| 1319 | |
| 1320 | if (pin >= 0 && pin <= 4) |
| 1321 | return str[pin]; |
| 1322 | else |
| 1323 | return "Invalid PIN, not 0 - 4"; |
| 1324 | } |
| 1325 | |
| 1326 | /** |
| 1327 | * Get the PCI INT_PIN swizzle for a device defined as: |
| 1328 | * pin_parent = (pin_child + devn_child) % 4 + 1 |
| 1329 | * where PIN A = 1 ... PIN_D = 4 |
| 1330 | * |
| 1331 | * Given a PCI device structure 'dev', find the interrupt pin |
| 1332 | * that will be triggered on its parent bridge device when |
| 1333 | * generating an interrupt. For example: Device 1:3.2 may |
| 1334 | * use INT_PIN A but will trigger PIN D on its parent bridge |
| 1335 | * device. In this case, this function will return 4 (PIN D). |
| 1336 | * |
| 1337 | * @param dev A PCI device structure to swizzle interrupt pins for |
| 1338 | * @param *parent_bdg The PCI device structure for the bridge |
| 1339 | * device 'dev' is attached to |
| 1340 | * @return The interrupt pin number (1 - 4) that 'dev' will |
| 1341 | * trigger when generating an interrupt |
| 1342 | */ |
| 1343 | static int swizzle_irq_pins(device_t dev, device_t *parent_bridge) |
| 1344 | { |
| 1345 | device_t parent; /* Our current device's parent device */ |
| 1346 | device_t child; /* The child device of the parent */ |
| 1347 | uint8_t parent_bus = 0; /* Parent Bus number */ |
| 1348 | uint16_t parent_devfn = 0; /* Parent Device and Function number */ |
| 1349 | uint16_t child_devfn = 0; /* Child Device and Function number */ |
| 1350 | uint8_t swizzled_pin = 0; /* Pin swizzled across a bridge */ |
| 1351 | |
| 1352 | /* Start with PIN A = 0 ... D = 3 */ |
| 1353 | swizzled_pin = pci_read_config8(dev, PCI_INTERRUPT_PIN) - 1; |
| 1354 | |
| 1355 | /* While our current device has parent devices */ |
| 1356 | child = dev; |
| 1357 | for (parent = child->bus->dev; parent; parent = parent->bus->dev) { |
| 1358 | parent_bus = parent->bus->secondary; |
| 1359 | parent_devfn = parent->path.pci.devfn; |
| 1360 | child_devfn = child->path.pci.devfn; |
| 1361 | |
| 1362 | /* Swizzle the INT_PIN for any bridges not on root bus */ |
| 1363 | swizzled_pin = (PCI_SLOT(child_devfn) + swizzled_pin) % 4; |
| 1364 | printk(BIOS_SPEW, "\tWith INT_PIN swizzled to %s\n" |
| 1365 | "\tAttached to bridge device %01X:%02Xh.%02Xh\n", |
| 1366 | pin_to_str(swizzled_pin + 1), parent_bus, |
| 1367 | PCI_SLOT(parent_devfn), PCI_FUNC(parent_devfn)); |
| 1368 | |
| 1369 | /* Continue until we find the root bus */ |
| 1370 | if (parent_bus > 0) { |
| 1371 | /* |
| 1372 | * We will go on to the next parent so this parent |
| 1373 | * becomes the child |
| 1374 | */ |
| 1375 | child = parent; |
| 1376 | continue; |
| 1377 | } else { |
| 1378 | /* |
| 1379 | * Found the root bridge device, |
| 1380 | * fill in the structure and exit |
| 1381 | */ |
| 1382 | *parent_bridge = parent; |
| 1383 | break; |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | /* End with PIN A = 1 ... D = 4 */ |
| 1388 | return swizzled_pin + 1; |
| 1389 | } |
| 1390 | |
| 1391 | /** |
| 1392 | * Given a device structure 'dev', find its interrupt pin |
| 1393 | * and its parent bridge 'parent_bdg' device structure. |
| 1394 | * If it is behind a bridge, it will return the interrupt |
| 1395 | * pin number (1 - 4) of the parent bridge that the device |
| 1396 | * interrupt pin has been swizzled to, otherwise it will |
| 1397 | * return the interrupt pin that is programmed into the |
| 1398 | * PCI config space of the target device. If 'dev' is |
| 1399 | * behind a bridge, it will fill in 'parent_bdg' with the |
| 1400 | * device structure of the bridge it is behind, otherwise |
| 1401 | * it will copy 'dev' into 'parent_bdg'. |
| 1402 | * |
| 1403 | * @param dev A PCI device structure to get interrupt pins for. |
| 1404 | * @param *parent_bdg The PCI device structure for the bridge |
| 1405 | * device 'dev' is attached to. |
| 1406 | * @return The interrupt pin number (1 - 4) that 'dev' will |
| 1407 | * trigger when generating an interrupt. |
| 1408 | * Errors: -1 is returned if the device is not enabled |
| 1409 | * -2 is returned if a parent bridge could not be found. |
| 1410 | */ |
| 1411 | int get_pci_irq_pins(device_t dev, device_t *parent_bdg) |
| 1412 | { |
| 1413 | uint8_t bus = 0; /* The bus this device is on */ |
| 1414 | uint16_t devfn = 0; /* This device's device and function numbers */ |
| 1415 | uint8_t int_pin = 0; /* Interrupt pin used by the device */ |
| 1416 | uint8_t target_pin = 0; /* Interrupt pin we want to assign an IRQ to */ |
| 1417 | |
| 1418 | /* Make sure this device is enabled */ |
| 1419 | if (!(dev->enabled && (dev->path.type == DEVICE_PATH_PCI))) |
| 1420 | return -1; |
| 1421 | |
| 1422 | bus = dev->bus->secondary; |
| 1423 | devfn = dev->path.pci.devfn; |
| 1424 | |
| 1425 | /* Get and validate the interrupt pin used. Only 1-4 are allowed */ |
| 1426 | int_pin = pci_read_config8(dev, PCI_INTERRUPT_PIN); |
| 1427 | if (int_pin < 1 || int_pin > 4) |
| 1428 | return -1; |
| 1429 | |
| 1430 | printk(BIOS_SPEW, "PCI IRQ: Found device %01X:%02X.%02X using %s\n", |
| 1431 | bus, PCI_SLOT(devfn), PCI_FUNC(devfn), pin_to_str(int_pin)); |
| 1432 | |
| 1433 | /* If this device is on a bridge, swizzle its INT_PIN */ |
| 1434 | if (bus) { |
| 1435 | /* Swizzle its INT_PINs */ |
| 1436 | target_pin = swizzle_irq_pins(dev, parent_bdg); |
| 1437 | |
| 1438 | /* Make sure the swizzle returned valid structures */ |
| 1439 | if (parent_bdg == NULL) { |
| 1440 | printk(BIOS_WARNING, |
| 1441 | "Warning: Could not find parent bridge for this device!\n"); |
| 1442 | return -2; |
| 1443 | } |
| 1444 | } else { /* Device is not behind a bridge */ |
| 1445 | target_pin = int_pin; /* Return its own interrupt pin */ |
| 1446 | *parent_bdg = dev; /* Return its own structure */ |
| 1447 | } |
| 1448 | |
| 1449 | /* Target pin is the interrupt pin we want to assign an IRQ to */ |
| 1450 | return target_pin; |
| 1451 | } |
| 1452 | |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 1453 | #if CONFIG_PC80_SYSTEM |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1454 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1455 | * Assign IRQ numbers. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1456 | * |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1457 | * This function assigns IRQs for all functions contained within the indicated |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1458 | * device address. If the device does not exist or does not require interrupts |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1459 | * then this function has no effect. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1460 | * |
| 1461 | * This function should be called for each PCI slot in your system. |
| 1462 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1463 | * @param bus Pointer to the bus structure. |
| 1464 | * @param slot TODO |
| 1465 | * @param pIntAtoD An array of IRQ #s that are assigned to PINTA through PINTD |
| 1466 | * of this slot. The particular IRQ #s that are passed in depend on the |
| 1467 | * routing inside your southbridge and on your board. |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1468 | */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1469 | void pci_assign_irqs(unsigned bus, unsigned slot, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1470 | const unsigned char pIntAtoD[4]) |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1471 | { |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1472 | unsigned int funct; |
| 1473 | device_t pdev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1474 | u8 line, irq; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1475 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1476 | /* Each slot may contain up to eight functions. */ |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1477 | for (funct = 0; funct < 8; funct++) { |
| 1478 | pdev = dev_find_slot(bus, (slot << 3) + funct); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1479 | |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1480 | if (!pdev) |
| 1481 | continue; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1482 | |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1483 | line = pci_read_config8(pdev, PCI_INTERRUPT_PIN); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1484 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1485 | /* PCI spec says all values except 1..4 are reserved. */ |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1486 | if ((line < 1) || (line > 4)) |
| 1487 | continue; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1488 | |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1489 | irq = pIntAtoD[line - 1]; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1490 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1491 | printk(BIOS_DEBUG, "Assigning IRQ %d to %d:%x.%d\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1492 | irq, bus, slot, funct); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1493 | |
Stefan Reinauer | 14e2277 | 2010-04-27 06:56:47 +0000 | [diff] [blame] | 1494 | pci_write_config8(pdev, PCI_INTERRUPT_LINE, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1495 | pIntAtoD[line - 1]); |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1496 | |
| 1497 | #ifdef PARANOID_IRQ_ASSIGNMENTS |
Myles Watson | 17aeeca | 2009-10-07 18:41:08 +0000 | [diff] [blame] | 1498 | irq = pci_read_config8(pdev, PCI_INTERRUPT_LINE); |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1499 | printk(BIOS_DEBUG, " Readback = %d\n", irq); |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1500 | #endif |
| 1501 | |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 1502 | #if CONFIG_PC80_SYSTEM |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1503 | /* Change to level triggered. */ |
| 1504 | i8259_configure_irq_trigger(pIntAtoD[line - 1], |
| 1505 | IRQ_LEVEL_TRIGGERED); |
Stefan Reinauer | 5fb6216 | 2010-12-16 23:52:04 +0000 | [diff] [blame] | 1506 | #endif |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1507 | } |
| 1508 | } |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1509 | #endif |