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) |
Uwe Hermann | b80dbf0 | 2007-04-22 19:08:13 +0000 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | /* |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 18 | * PCI Bus Services, see include/linux/pci.h for further explanation. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 19 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 20 | * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter, |
| 21 | * David Mosberger-Tang |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 22 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 23 | * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 24 | */ |
| 25 | |
| 26 | #include <console/console.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <stdint.h> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 29 | #include <string.h> |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 30 | #include <arch/io.h> |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 31 | #include <device/device.h> |
| 32 | #include <device/pci.h> |
| 33 | #include <device/pci_ids.h> |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 34 | #include <delay.h> |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 35 | #if CONFIG_HYPERTRANSPORT_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 36 | #include <device/hypertransport.h> |
| 37 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 38 | #if CONFIG_PCIX_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 39 | #include <device/pcix.h> |
| 40 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 41 | #if CONFIG_PCIEXP_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 42 | #include <device/pciexp.h> |
| 43 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 44 | #if CONFIG_AGP_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 45 | #include <device/agp.h> |
| 46 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 47 | #if CONFIG_CARDBUS_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 48 | #include <device/cardbus.h> |
| 49 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 50 | #if CONFIG_PC80_SYSTEM |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 51 | #include <pc80/i8259.h> |
| 52 | #endif |
Stefan Reinauer | 0a50084 | 2011-09-23 10:33:58 -0700 | [diff] [blame] | 53 | #if CONFIG_HAVE_ACPI_RESUME && !CONFIG_S3_VGA_ROM_RUN |
| 54 | #include <arch/acpi.h> |
| 55 | #endif |
Stefan Reinauer | 74a0efe | 2012-03-30 17:10:49 -0700 | [diff] [blame] | 56 | #if CONFIG_CHROMEOS |
| 57 | #include <vendorcode/google/chromeos/chromeos.h> |
| 58 | #endif |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 59 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 60 | u8 pci_moving_config8(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 61 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 62 | u8 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 63 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 64 | value = pci_read_config8(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 65 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 66 | pci_write_config8(dev, reg, 0xff); |
| 67 | ones = pci_read_config8(dev, reg); |
| 68 | |
| 69 | pci_write_config8(dev, reg, 0x00); |
| 70 | zeroes = pci_read_config8(dev, reg); |
| 71 | |
| 72 | pci_write_config8(dev, reg, value); |
| 73 | |
| 74 | return ones ^ zeroes; |
| 75 | } |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 76 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 77 | u16 pci_moving_config16(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 78 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 79 | u16 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 80 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 81 | value = pci_read_config16(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 82 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 83 | pci_write_config16(dev, reg, 0xffff); |
| 84 | ones = pci_read_config16(dev, reg); |
| 85 | |
| 86 | pci_write_config16(dev, reg, 0x0000); |
| 87 | zeroes = pci_read_config16(dev, reg); |
| 88 | |
| 89 | pci_write_config16(dev, reg, value); |
| 90 | |
| 91 | return ones ^ zeroes; |
| 92 | } |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 93 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 94 | u32 pci_moving_config32(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 95 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 96 | u32 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 97 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 98 | value = pci_read_config32(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 99 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 100 | pci_write_config32(dev, reg, 0xffffffff); |
| 101 | ones = pci_read_config32(dev, reg); |
| 102 | |
| 103 | pci_write_config32(dev, reg, 0x00000000); |
| 104 | zeroes = pci_read_config32(dev, reg); |
| 105 | |
| 106 | pci_write_config32(dev, reg, value); |
| 107 | |
| 108 | return ones ^ zeroes; |
| 109 | } |
| 110 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 111 | /** |
| 112 | * Given a device, a capability type, and a last position, return the next |
| 113 | * matching capability. Always start at the head of the list. |
| 114 | * |
| 115 | * @param dev Pointer to the device structure. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 116 | * @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] | 117 | * @param last Location of the PCI capability register to start from. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 118 | * @return The next matching capability. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 119 | */ |
| 120 | unsigned pci_find_next_capability(struct device *dev, unsigned cap, |
| 121 | unsigned last) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 122 | { |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 123 | unsigned pos = 0; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 124 | u16 status; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 125 | unsigned reps = 48; |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 126 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 127 | status = pci_read_config16(dev, PCI_STATUS); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 128 | if (!(status & PCI_STATUS_CAP_LIST)) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 129 | return 0; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 130 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 131 | switch (dev->hdr_type & 0x7f) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 132 | case PCI_HEADER_TYPE_NORMAL: |
| 133 | case PCI_HEADER_TYPE_BRIDGE: |
| 134 | pos = PCI_CAPABILITY_LIST; |
| 135 | break; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 136 | case PCI_HEADER_TYPE_CARDBUS: |
| 137 | pos = PCI_CB_CAPABILITY_LIST; |
| 138 | break; |
| 139 | default: |
| 140 | return 0; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 141 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 142 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 143 | pos = pci_read_config8(dev, pos); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 144 | while (reps-- && (pos >= 0x40)) { /* Loop through the linked list. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 145 | int this_cap; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 146 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 147 | pos &= ~3; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 148 | this_cap = pci_read_config8(dev, pos + PCI_CAP_LIST_ID); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 149 | printk(BIOS_SPEW, "Capability: type 0x%02x @ 0x%02x\n", |
| 150 | this_cap, pos); |
| 151 | if (this_cap == 0xff) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 152 | break; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 153 | |
| 154 | if (!last && (this_cap == cap)) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 155 | return pos; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 156 | |
| 157 | if (last == pos) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 158 | last = 0; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 159 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 160 | pos = pci_read_config8(dev, pos + PCI_CAP_LIST_NEXT); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 161 | } |
| 162 | return 0; |
| 163 | } |
| 164 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 165 | /** |
| 166 | * Given a device, and a capability type, return the next matching |
| 167 | * capability. Always start at the head of the list. |
| 168 | * |
| 169 | * @param dev Pointer to the device structure. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 170 | * @param cap PCI_CAP_LIST_ID of the PCI capability we're looking for. |
| 171 | * @return The next matching capability. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 172 | */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 173 | unsigned pci_find_capability(device_t dev, unsigned cap) |
| 174 | { |
| 175 | return pci_find_next_capability(dev, cap, 0); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 176 | } |
| 177 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 178 | /** |
| 179 | * Given a device and register, read the size of the BAR for that register. |
| 180 | * |
| 181 | * @param dev Pointer to the device structure. |
| 182 | * @param index Address of the PCI configuration register. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 183 | * @return TODO |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 184 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 185 | struct resource *pci_get_resource(struct device *dev, unsigned long index) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 186 | { |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 187 | struct resource *resource; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 188 | unsigned long value, attr; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 189 | resource_t moving, limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 190 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 191 | /* Initialize the resources to nothing. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 192 | resource = new_resource(dev, index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 193 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 194 | /* Get the initial value. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 195 | value = pci_read_config32(dev, index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 196 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 197 | /* See which bits move. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 198 | moving = pci_moving_config32(dev, index); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 199 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 200 | /* Initialize attr to the bits that do not move. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 201 | attr = value & ~moving; |
| 202 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 203 | /* 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] | 204 | if (((attr & PCI_BASE_ADDRESS_SPACE_IO) == 0) && |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 205 | ((attr & PCI_BASE_ADDRESS_MEM_LIMIT_MASK) == |
| 206 | PCI_BASE_ADDRESS_MEM_LIMIT_64)) { |
| 207 | /* Find the high bits that move. */ |
| 208 | moving |= |
| 209 | ((resource_t) pci_moving_config32(dev, index + 4)) << 32; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 210 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 211 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 212 | /* Find the resource constraints. |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 213 | * Start by finding the bits that move. From there: |
| 214 | * - Size is the least significant bit of the bits that move. |
| 215 | * - 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] | 216 | * See PCI Spec 6.2.5.1. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 217 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 218 | limit = 0; |
| 219 | if (moving) { |
| 220 | resource->size = 1; |
| 221 | resource->align = resource->gran = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 222 | while (!(moving & resource->size)) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 223 | resource->size <<= 1; |
| 224 | resource->align += 1; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 225 | resource->gran += 1; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 226 | } |
| 227 | resource->limit = limit = moving | (resource->size - 1); |
| 228 | } |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 229 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 230 | /* |
| 231 | * Some broken hardware has read-only registers that do not |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 232 | * really size correctly. |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 233 | * |
| 234 | * Example: the Acer M7229 has BARs 1-4 normally read-only, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 235 | * so BAR1 at offset 0x10 reads 0x1f1. If you size that register |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 236 | * by writing 0xffffffff to it, it will read back as 0x1f1 -- which |
| 237 | * is a violation of the spec. |
| 238 | * |
| 239 | * We catch this case and ignore it by observing which bits move. |
| 240 | * |
| 241 | * This also catches the common case of unimplemented registers |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 242 | * that always read back as 0. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 243 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 244 | if (moving == 0) { |
| 245 | if (value != 0) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 246 | printk(BIOS_DEBUG, "%s register %02lx(%08lx), " |
| 247 | "read-only ignoring it\n", |
| 248 | dev_path(dev), index, value); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 249 | } |
| 250 | resource->flags = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 251 | } else if (attr & PCI_BASE_ADDRESS_SPACE_IO) { |
| 252 | /* An I/O mapped base address. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 253 | attr &= PCI_BASE_ADDRESS_IO_ATTR_MASK; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 254 | resource->flags |= IORESOURCE_IO; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 255 | /* I don't want to deal with 32bit I/O resources. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 256 | resource->limit = 0xffff; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 257 | } else { |
| 258 | /* A Memory mapped base address. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 259 | attr &= PCI_BASE_ADDRESS_MEM_ATTR_MASK; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 260 | resource->flags |= IORESOURCE_MEM; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 261 | if (attr & PCI_BASE_ADDRESS_MEM_PREFETCH) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 262 | resource->flags |= IORESOURCE_PREFETCH; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 263 | attr &= PCI_BASE_ADDRESS_MEM_LIMIT_MASK; |
| 264 | if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_32) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 265 | /* 32bit limit. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 266 | resource->limit = 0xffffffffUL; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 267 | } else if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_1M) { |
| 268 | /* 1MB limit. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 269 | resource->limit = 0x000fffffUL; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 270 | } else if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_64) { |
| 271 | /* 64bit limit. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 272 | resource->limit = 0xffffffffffffffffULL; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 273 | resource->flags |= IORESOURCE_PCI64; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 274 | } else { |
| 275 | /* Invalid value. */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 276 | printk(BIOS_ERR, "Broken BAR with value %lx\n", attr); |
| 277 | printk(BIOS_ERR, " on dev %s at index %02lx\n", |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 278 | dev_path(dev), index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 279 | resource->flags = 0; |
| 280 | } |
| 281 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 282 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 283 | /* Don't let the limit exceed which bits can move. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 284 | if (resource->limit > limit) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 285 | resource->limit = limit; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 286 | |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 287 | return resource; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 288 | } |
| 289 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 290 | /** |
| 291 | * Given a device and an index, read the size of the BAR for that register. |
| 292 | * |
| 293 | * @param dev Pointer to the device structure. |
| 294 | * @param index Address of the PCI configuration register. |
| 295 | */ |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 296 | 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] | 297 | { |
| 298 | struct resource *resource; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 299 | unsigned long value; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 300 | resource_t moving; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 301 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 302 | /* Initialize the resources to nothing. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 303 | resource = new_resource(dev, index); |
| 304 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 305 | /* Get the initial value. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 306 | value = pci_read_config32(dev, index); |
| 307 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 308 | /* See which bits move. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 309 | moving = pci_moving_config32(dev, index); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 310 | |
| 311 | /* Clear the Enable bit. */ |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 312 | moving = moving & ~PCI_ROM_ADDRESS_ENABLE; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 313 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 314 | /* Find the resource constraints. |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 315 | * Start by finding the bits that move. From there: |
| 316 | * - Size is the least significant bit of the bits that move. |
| 317 | * - 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] | 318 | * See PCI Spec 6.2.5.1. |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 319 | */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 320 | if (moving) { |
| 321 | resource->size = 1; |
| 322 | resource->align = resource->gran = 0; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 323 | while (!(moving & resource->size)) { |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 324 | resource->size <<= 1; |
| 325 | resource->align += 1; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 326 | resource->gran += 1; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 327 | } |
Patrick Georgi | 16cdbb2 | 2009-04-21 20:14:31 +0000 | [diff] [blame] | 328 | resource->limit = moving | (resource->size - 1); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 329 | resource->flags |= IORESOURCE_MEM | IORESOURCE_READONLY; |
| 330 | } else { |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 331 | if (value != 0) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 332 | printk(BIOS_DEBUG, "%s register %02lx(%08lx), " |
| 333 | "read-only ignoring it\n", |
| 334 | dev_path(dev), index, value); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 335 | } |
| 336 | resource->flags = 0; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 337 | } |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 338 | compact_resources(dev); |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 339 | } |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 340 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 341 | /** |
| 342 | * Read the base address registers for a given device. |
| 343 | * |
| 344 | * @param dev Pointer to the dev structure. |
| 345 | * @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] | 346 | */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 347 | static void pci_read_bases(struct device *dev, unsigned int howmany) |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 348 | { |
| 349 | unsigned long index; |
| 350 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 351 | for (index = PCI_BASE_ADDRESS_0; |
| 352 | (index < PCI_BASE_ADDRESS_0 + (howmany << 2));) { |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 353 | struct resource *resource; |
| 354 | resource = pci_get_resource(dev, index); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 355 | index += (resource->flags & IORESOURCE_PCI64) ? 8 : 4; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 356 | } |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 357 | |
| 358 | compact_resources(dev); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 359 | } |
| 360 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 361 | static void pci_record_bridge_resource(struct device *dev, resource_t moving, |
| 362 | unsigned index, unsigned long type) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 363 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 364 | struct resource *resource; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 365 | unsigned long gran; |
| 366 | resource_t step; |
| 367 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 368 | resource = NULL; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 369 | |
| 370 | if (!moving) |
| 371 | return; |
| 372 | |
| 373 | /* Initialize the constraints on the current bus. */ |
| 374 | resource = new_resource(dev, index); |
| 375 | resource->size = 0; |
| 376 | gran = 0; |
| 377 | step = 1; |
| 378 | while ((moving & step) == 0) { |
| 379 | gran += 1; |
| 380 | step <<= 1; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 381 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 382 | resource->gran = gran; |
| 383 | resource->align = gran; |
| 384 | resource->limit = moving | (step - 1); |
| 385 | resource->flags = type | IORESOURCE_PCI_BRIDGE | |
| 386 | IORESOURCE_BRIDGE; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 387 | } |
| 388 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 389 | static void pci_bridge_read_bases(struct device *dev) |
| 390 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 391 | resource_t moving_base, moving_limit, moving; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 392 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 393 | /* See if the bridge I/O resources are implemented. */ |
| 394 | moving_base = ((u32) pci_moving_config8(dev, PCI_IO_BASE)) << 8; |
| 395 | moving_base |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 396 | ((u32) pci_moving_config16(dev, PCI_IO_BASE_UPPER16)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 397 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 398 | moving_limit = ((u32) pci_moving_config8(dev, PCI_IO_LIMIT)) << 8; |
| 399 | moving_limit |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 400 | ((u32) pci_moving_config16(dev, PCI_IO_LIMIT_UPPER16)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 401 | |
| 402 | moving = moving_base & moving_limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 403 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 404 | /* Initialize the I/O space constraints on the current bus. */ |
| 405 | pci_record_bridge_resource(dev, moving, PCI_IO_BASE, IORESOURCE_IO); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 406 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 407 | /* See if the bridge prefmem resources are implemented. */ |
| 408 | moving_base = |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 409 | ((resource_t) pci_moving_config16(dev, PCI_PREF_MEMORY_BASE)) << 16; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 410 | moving_base |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 411 | ((resource_t) pci_moving_config32(dev, PCI_PREF_BASE_UPPER32)) << 32; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 412 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 413 | moving_limit = |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 414 | ((resource_t) pci_moving_config16(dev, PCI_PREF_MEMORY_LIMIT)) << 16; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 415 | moving_limit |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 416 | ((resource_t) pci_moving_config32(dev, PCI_PREF_LIMIT_UPPER32)) << 32; |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 417 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 418 | moving = moving_base & moving_limit; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 419 | /* Initialize the prefetchable memory constraints on the current bus. */ |
| 420 | pci_record_bridge_resource(dev, moving, PCI_PREF_MEMORY_BASE, |
| 421 | IORESOURCE_MEM | IORESOURCE_PREFETCH); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 422 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 423 | /* See if the bridge mem resources are implemented. */ |
| 424 | moving_base = ((u32) pci_moving_config16(dev, PCI_MEMORY_BASE)) << 16; |
| 425 | moving_limit = ((u32) pci_moving_config16(dev, PCI_MEMORY_LIMIT)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 426 | |
| 427 | moving = moving_base & moving_limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 428 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 429 | /* Initialize the memory resources on the current bus. */ |
| 430 | pci_record_bridge_resource(dev, moving, PCI_MEMORY_BASE, |
| 431 | IORESOURCE_MEM); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 432 | |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 433 | compact_resources(dev); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 434 | } |
| 435 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 436 | void pci_dev_read_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 437 | { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 438 | pci_read_bases(dev, 6); |
| 439 | pci_get_rom_resource(dev, PCI_ROM_ADDRESS); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 440 | } |
| 441 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 442 | void pci_bus_read_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 443 | { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 444 | pci_bridge_read_bases(dev); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 445 | pci_read_bases(dev, 2); |
| 446 | pci_get_rom_resource(dev, PCI_ROM_ADDRESS1); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 447 | } |
| 448 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 449 | void pci_domain_read_resources(struct device *dev) |
| 450 | { |
| 451 | struct resource *res; |
| 452 | |
| 453 | /* Initialize the system-wide I/O space constraints. */ |
| 454 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); |
| 455 | res->limit = 0xffffUL; |
| 456 | res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | |
| 457 | IORESOURCE_ASSIGNED; |
| 458 | |
| 459 | /* Initialize the system-wide memory resources constraints. */ |
| 460 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); |
| 461 | res->limit = 0xffffffffULL; |
| 462 | res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | |
| 463 | IORESOURCE_ASSIGNED; |
| 464 | } |
| 465 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 466 | static void pci_set_resource(struct device *dev, struct resource *resource) |
| 467 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 468 | resource_t base, end; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 469 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 470 | /* Make certain the resource has actually been assigned a value. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 471 | if (!(resource->flags & IORESOURCE_ASSIGNED)) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 472 | printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010llx not " |
| 473 | "assigned\n", dev_path(dev), resource->index, |
| 474 | resource_type(resource), resource->size); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 475 | return; |
| 476 | } |
| 477 | |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 478 | /* If this resource is fixed don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 479 | if (resource->flags & IORESOURCE_FIXED) |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 480 | return; |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 481 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 482 | /* If I have already stored this resource don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 483 | if (resource->flags & IORESOURCE_STORED) |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 484 | return; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 485 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 486 | /* If the resource is subtractive don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 487 | if (resource->flags & IORESOURCE_SUBTRACTIVE) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 488 | return; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 489 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 490 | /* Only handle PCI memory and I/O resources for now. */ |
| 491 | if (!(resource->flags & (IORESOURCE_MEM | IORESOURCE_IO))) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 492 | return; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 493 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 494 | /* Enable the resources in the command register. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 495 | if (resource->size) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 496 | if (resource->flags & IORESOURCE_MEM) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 497 | dev->command |= PCI_COMMAND_MEMORY; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 498 | if (resource->flags & IORESOURCE_IO) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 499 | dev->command |= PCI_COMMAND_IO; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 500 | if (resource->flags & IORESOURCE_PCI_BRIDGE) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 501 | dev->command |= PCI_COMMAND_MASTER; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 502 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 503 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 504 | /* Get the base address. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 505 | base = resource->base; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 506 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 507 | /* Get the end. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 508 | end = resource_end(resource); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 509 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 510 | /* Now store the resource. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 511 | resource->flags |= IORESOURCE_STORED; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 512 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 513 | /* |
| 514 | * PCI bridges have no enable bit. They are disabled if the base of |
| 515 | * 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] | 516 | * by setting the base = limit and end = limit - 2^gran. |
| 517 | */ |
| 518 | if (resource->size == 0 && (resource->flags & IORESOURCE_PCI_BRIDGE)) { |
| 519 | base = resource->limit; |
| 520 | end = resource->limit - (1 << resource->gran); |
| 521 | resource->base = base; |
| 522 | } |
| 523 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 524 | if (!(resource->flags & IORESOURCE_PCI_BRIDGE)) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 525 | unsigned long base_lo, base_hi; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 526 | |
| 527 | /* |
| 528 | * Some chipsets allow us to set/clear the I/O bit |
| 529 | * (e.g. VIA 82C686A). So set it to be safe. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 530 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 531 | base_lo = base & 0xffffffff; |
| 532 | base_hi = (base >> 32) & 0xffffffff; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 533 | if (resource->flags & IORESOURCE_IO) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 534 | base_lo |= PCI_BASE_ADDRESS_SPACE_IO; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 535 | pci_write_config32(dev, resource->index, base_lo); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 536 | if (resource->flags & IORESOURCE_PCI64) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 537 | pci_write_config32(dev, resource->index + 4, base_hi); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 538 | } else if (resource->index == PCI_IO_BASE) { |
| 539 | /* Set the I/O ranges. */ |
| 540 | pci_write_config8(dev, PCI_IO_BASE, base >> 8); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 541 | pci_write_config16(dev, PCI_IO_BASE_UPPER16, base >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 542 | pci_write_config8(dev, PCI_IO_LIMIT, end >> 8); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 543 | pci_write_config16(dev, PCI_IO_LIMIT_UPPER16, end >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 544 | } else if (resource->index == PCI_MEMORY_BASE) { |
| 545 | /* Set the memory range. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 546 | pci_write_config16(dev, PCI_MEMORY_BASE, base >> 16); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 547 | pci_write_config16(dev, PCI_MEMORY_LIMIT, end >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 548 | } else if (resource->index == PCI_PREF_MEMORY_BASE) { |
| 549 | /* Set the prefetchable memory range. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 550 | pci_write_config16(dev, PCI_PREF_MEMORY_BASE, base >> 16); |
| 551 | pci_write_config32(dev, PCI_PREF_BASE_UPPER32, base >> 32); |
| 552 | pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT, end >> 16); |
| 553 | pci_write_config32(dev, PCI_PREF_LIMIT_UPPER32, end >> 32); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 554 | } else { |
| 555 | /* Don't let me think I stored the resource. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 556 | resource->flags &= ~IORESOURCE_STORED; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 557 | printk(BIOS_ERR, "ERROR: invalid resource->index %lx\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 558 | resource->index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 559 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 560 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 561 | report_resource_stored(dev, resource, ""); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 562 | } |
| 563 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 564 | void pci_dev_set_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 565 | { |
Myles Watson | c25cc11 | 2010-05-21 14:33:48 +0000 | [diff] [blame] | 566 | struct resource *res; |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 567 | struct bus *bus; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 568 | u8 line; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 569 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 570 | for (res = dev->resource_list; res; res = res->next) |
Myles Watson | c25cc11 | 2010-05-21 14:33:48 +0000 | [diff] [blame] | 571 | pci_set_resource(dev, res); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 572 | |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 573 | for (bus = dev->link_list; bus; bus = bus->next) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 574 | if (bus->children) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 575 | assign_resources(bus); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 576 | } |
| 577 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 578 | /* Set a default latency timer. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 579 | pci_write_config8(dev, PCI_LATENCY_TIMER, 0x40); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 580 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 581 | /* Set a default secondary latency timer. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 582 | if ((dev->hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE) |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 583 | pci_write_config8(dev, PCI_SEC_LATENCY_TIMER, 0x40); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 584 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 585 | /* Zero the IRQ settings. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 586 | line = pci_read_config8(dev, PCI_INTERRUPT_PIN); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 587 | if (line) |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 588 | pci_write_config8(dev, PCI_INTERRUPT_LINE, 0); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 589 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 590 | /* 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] | 591 | pci_write_config8(dev, PCI_CACHE_LINE_SIZE, 64 >> 2); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 592 | } |
| 593 | |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 594 | void pci_dev_enable_resources(struct device *dev) |
| 595 | { |
Eric Biederman | a9e632c | 2004-11-18 22:38:08 +0000 | [diff] [blame] | 596 | const struct pci_operations *ops; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 597 | u16 command; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 598 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 599 | /* Set the subsystem vendor and device ID for mainboard devices. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 600 | ops = ops_pci(dev); |
Eric Biederman | dbec2d4 | 2004-10-21 10:44:08 +0000 | [diff] [blame] | 601 | if (dev->on_mainboard && ops && ops->set_subsystem) { |
Sven Schnelle | 9132102 | 2011-03-01 19:58:47 +0000 | [diff] [blame] | 602 | printk(BIOS_DEBUG, "%s subsystem <- %04x/%04x\n", |
| 603 | dev_path(dev), dev->subsystem_vendor, |
| 604 | dev->subsystem_device); |
| 605 | ops->set_subsystem(dev, dev->subsystem_vendor, |
| 606 | dev->subsystem_device); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 607 | } |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 608 | command = pci_read_config16(dev, PCI_COMMAND); |
| 609 | command |= dev->command; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 610 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 611 | /* v3 has |
| 612 | * command |= (PCI_COMMAND_PARITY + PCI_COMMAND_SERR); // Error check. |
| 613 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 614 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 615 | printk(BIOS_DEBUG, "%s cmd <- %02x\n", dev_path(dev), command); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 616 | pci_write_config16(dev, PCI_COMMAND, command); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | void pci_bus_enable_resources(struct device *dev) |
| 620 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 621 | u16 ctrl; |
| 622 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 623 | /* |
| 624 | * Enable I/O in command register if there is VGA card |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 625 | * connected with (even it does not claim I/O resource). |
| 626 | */ |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 627 | if (dev->link_list->bridge_ctrl & PCI_BRIDGE_CTL_VGA) |
Li-Ta Lo | 515f6c7 | 2005-01-11 22:48:54 +0000 | [diff] [blame] | 628 | dev->command |= PCI_COMMAND_IO; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 629 | ctrl = pci_read_config16(dev, PCI_BRIDGE_CONTROL); |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 630 | ctrl |= dev->link_list->bridge_ctrl; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 631 | ctrl |= (PCI_BRIDGE_CTL_PARITY + PCI_BRIDGE_CTL_SERR); /* Error check. */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 632 | printk(BIOS_DEBUG, "%s bridge ctrl <- %04x\n", dev_path(dev), ctrl); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 633 | pci_write_config16(dev, PCI_BRIDGE_CONTROL, ctrl); |
| 634 | |
| 635 | pci_dev_enable_resources(dev); |
| 636 | } |
| 637 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 638 | void pci_bus_reset(struct bus *bus) |
| 639 | { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 640 | u16 ctl; |
| 641 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 642 | ctl = pci_read_config16(bus->dev, PCI_BRIDGE_CONTROL); |
| 643 | ctl |= PCI_BRIDGE_CTL_BUS_RESET; |
| 644 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, ctl); |
| 645 | mdelay(10); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 646 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 647 | ctl &= ~PCI_BRIDGE_CTL_BUS_RESET; |
| 648 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, ctl); |
| 649 | delay(1); |
| 650 | } |
| 651 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 652 | void pci_dev_set_subsystem(struct device *dev, unsigned vendor, unsigned device) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 653 | { |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 654 | pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 655 | ((device & 0xffff) << 16) | (vendor & 0xffff)); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 656 | } |
| 657 | |
Bill Richardson | 0a405ba | 2012-06-26 16:33:45 -0700 | [diff] [blame] | 658 | #if CONFIG_CHROMEOS |
| 659 | int oprom_is_loaded = 0; |
| 660 | #endif |
| 661 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 662 | /** Default handler: only runs the relevant PCI BIOS. */ |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 663 | void pci_dev_init(struct device *dev) |
| 664 | { |
Stefan Reinauer | 8ada152 | 2012-11-16 13:34:48 -0800 | [diff] [blame] | 665 | #if CONFIG_PCI_ROM_RUN || CONFIG_VGA_ROM_RUN |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 666 | struct rom_header *rom, *ram; |
| 667 | |
Myles Watson | 17aeeca | 2009-10-07 18:41:08 +0000 | [diff] [blame] | 668 | if (CONFIG_PCI_ROM_RUN != 1 && /* Only execute VGA ROMs. */ |
| 669 | ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)) |
Roman Kononov | 778a42b | 2007-04-06 18:34:39 +0000 | [diff] [blame] | 670 | return; |
Myles Watson | 17aeeca | 2009-10-07 18:41:08 +0000 | [diff] [blame] | 671 | |
| 672 | if (CONFIG_VGA_ROM_RUN != 1 && /* Only execute non-VGA ROMs. */ |
| 673 | ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)) |
| 674 | return; |
Roman Kononov | 778a42b | 2007-04-06 18:34:39 +0000 | [diff] [blame] | 675 | |
Stefan Reinauer | 74a0efe | 2012-03-30 17:10:49 -0700 | [diff] [blame] | 676 | #if CONFIG_CHROMEOS |
| 677 | /* In ChromeOS we want to boot blazingly fast. Therefore |
| 678 | * we don't run (VGA) option ROMs, unless we have to print |
| 679 | * something on the screen before the kernel is loaded. |
| 680 | */ |
Bill Richardson | 0a405ba | 2012-06-26 16:33:45 -0700 | [diff] [blame] | 681 | if (!developer_mode_enabled() && !recovery_mode_enabled() && |
| 682 | !vboot_wants_oprom()) { |
| 683 | printk(BIOS_DEBUG, "Not loading VGA Option ROM\n"); |
Stefan Reinauer | 74a0efe | 2012-03-30 17:10:49 -0700 | [diff] [blame] | 684 | return; |
Bill Richardson | 0a405ba | 2012-06-26 16:33:45 -0700 | [diff] [blame] | 685 | } |
Stefan Reinauer | 74a0efe | 2012-03-30 17:10:49 -0700 | [diff] [blame] | 686 | #endif |
| 687 | |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 688 | rom = pci_rom_probe(dev); |
| 689 | if (rom == NULL) |
| 690 | return; |
Roman Kononov | 778a42b | 2007-04-06 18:34:39 +0000 | [diff] [blame] | 691 | |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 692 | ram = pci_rom_load(dev, rom); |
Yinghai Lu | 9e4faef | 2005-01-14 22:04:49 +0000 | [diff] [blame] | 693 | if (ram == NULL) |
| 694 | return; |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 695 | |
Stefan Reinauer | 0a50084 | 2011-09-23 10:33:58 -0700 | [diff] [blame] | 696 | #if CONFIG_HAVE_ACPI_RESUME && !CONFIG_S3_VGA_ROM_RUN |
| 697 | /* If S3_VGA_ROM_RUN is disabled, skip running VGA option |
| 698 | * ROMs when coming out of an S3 resume. |
| 699 | */ |
| 700 | if ((acpi_slp_type == 3) && |
| 701 | ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)) |
| 702 | return; |
| 703 | #endif |
Stefan Reinauer | d98cf5b | 2008-08-01 11:25:41 +0000 | [diff] [blame] | 704 | run_bios(dev, (unsigned long)ram); |
Bill Richardson | 0a405ba | 2012-06-26 16:33:45 -0700 | [diff] [blame] | 705 | #if CONFIG_CHROMEOS |
| 706 | oprom_is_loaded = 1; |
| 707 | printk(BIOS_DEBUG, "VGA Option ROM has been loaded\n"); |
| 708 | #endif |
Torsten Duwe | 1f2f800 | 2008-01-06 01:10:54 +0000 | [diff] [blame] | 709 | #endif /* CONFIG_PCI_ROM_RUN || CONFIG_VGA_ROM_RUN */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 710 | } |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 711 | |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 712 | /** Default device operation for PCI devices */ |
Eric Biederman | a9e632c | 2004-11-18 22:38:08 +0000 | [diff] [blame] | 713 | static struct pci_operations pci_dev_ops_pci = { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 714 | .set_subsystem = pci_dev_set_subsystem, |
| 715 | }; |
| 716 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 717 | struct device_operations default_pci_ops_dev = { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 718 | .read_resources = pci_dev_read_resources, |
| 719 | .set_resources = pci_dev_set_resources, |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 720 | .enable_resources = pci_dev_enable_resources, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 721 | .init = pci_dev_init, |
| 722 | .scan_bus = 0, |
| 723 | .enable = 0, |
| 724 | .ops_pci = &pci_dev_ops_pci, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 725 | }; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 726 | |
| 727 | /** Default device operations for PCI bridges */ |
Eric Biederman | a9e632c | 2004-11-18 22:38:08 +0000 | [diff] [blame] | 728 | static struct pci_operations pci_bus_ops_pci = { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 729 | .set_subsystem = 0, |
| 730 | }; |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 731 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 732 | struct device_operations default_pci_ops_bus = { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 733 | .read_resources = pci_bus_read_resources, |
| 734 | .set_resources = pci_dev_set_resources, |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 735 | .enable_resources = pci_bus_enable_resources, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 736 | .init = 0, |
| 737 | .scan_bus = pci_scan_bridge, |
| 738 | .enable = 0, |
| 739 | .reset_bus = pci_bus_reset, |
| 740 | .ops_pci = &pci_bus_ops_pci, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 741 | }; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 742 | |
| 743 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 744 | * Detect the type of downstream bridge. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 745 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 746 | * This function is a heuristic to detect which type of bus is downstream |
| 747 | * of a PCI-to-PCI bridge. This functions by looking for various capability |
| 748 | * blocks to figure out the type of downstream bridge. PCI-X, PCI-E, and |
| 749 | * Hypertransport all seem to have appropriate capabilities. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 750 | * |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 751 | * When only a PCI-Express capability is found the type is examined to see |
| 752 | * which type of bridge we have. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 753 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 754 | * @param dev Pointer to the device structure of the bridge. |
| 755 | * @return Appropriate bridge operations. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 756 | */ |
| 757 | static struct device_operations *get_pci_bridge_ops(device_t dev) |
| 758 | { |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 759 | #if CONFIG_PCIX_PLUGIN_SUPPORT |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame^] | 760 | unsigned int pcixpos; |
| 761 | pcixpos = pci_find_capability(dev, PCI_CAP_ID_PCIX); |
| 762 | if (pcixpos) { |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 763 | printk(BIOS_DEBUG, "%s subordinate bus PCI-X\n", dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 764 | return &default_pcix_ops_bus; |
| 765 | } |
| 766 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 767 | #if CONFIG_AGP_PLUGIN_SUPPORT |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 768 | /* How do I detect a PCI to AGP bridge? */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 769 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 770 | #if CONFIG_HYPERTRANSPORT_PLUGIN_SUPPORT |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame^] | 771 | unsigned int htpos = 0; |
| 772 | while ((htpos = pci_find_next_capability(dev, PCI_CAP_ID_HT, htpos))) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 773 | u16 flags; |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame^] | 774 | flags = pci_read_config16(dev, htpos + PCI_CAP_FLAGS); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 775 | if ((flags >> 13) == 1) { |
| 776 | /* Host or Secondary Interface */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 777 | printk(BIOS_DEBUG, "%s subordinate bus HT\n", |
| 778 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 779 | return &default_ht_ops_bus; |
| 780 | } |
| 781 | } |
| 782 | #endif |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 783 | #if CONFIG_PCIEXP_PLUGIN_SUPPORT |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame^] | 784 | unsigned int pciexpos; |
| 785 | pciexpos = pci_find_capability(dev, PCI_CAP_ID_PCIE); |
| 786 | if (pciexpos) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 787 | u16 flags; |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame^] | 788 | flags = pci_read_config16(dev, pciexpos + PCI_EXP_FLAGS); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 789 | switch ((flags & PCI_EXP_FLAGS_TYPE) >> 4) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 790 | case PCI_EXP_TYPE_ROOT_PORT: |
| 791 | case PCI_EXP_TYPE_UPSTREAM: |
| 792 | case PCI_EXP_TYPE_DOWNSTREAM: |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 793 | printk(BIOS_DEBUG, "%s subordinate bus PCI Express\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 794 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 795 | return &default_pciexp_ops_bus; |
| 796 | case PCI_EXP_TYPE_PCI_BRIDGE: |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 797 | printk(BIOS_DEBUG, "%s subordinate PCI\n", |
| 798 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 799 | return &default_pci_ops_bus; |
| 800 | default: |
| 801 | break; |
| 802 | } |
| 803 | } |
| 804 | #endif |
| 805 | return &default_pci_ops_bus; |
| 806 | } |
| 807 | |
| 808 | /** |
Vadim Bendebury | 8049fc9 | 2012-04-24 12:53:19 -0700 | [diff] [blame] | 809 | * Check if a device id matches a PCI driver entry. |
| 810 | * |
| 811 | * The driver entry can either point at a zero terminated array of acceptable |
| 812 | * device IDs, or include a single device ID. |
| 813 | * |
| 814 | * @driver pointer to the PCI driver entry being checked |
| 815 | * @device_id PCI device ID of the device being matched |
| 816 | */ |
| 817 | static int device_id_match(struct pci_driver *driver, unsigned short device_id) |
| 818 | { |
| 819 | if (driver->devices) { |
| 820 | unsigned short check_id; |
| 821 | const unsigned short *device_list = driver->devices; |
| 822 | while ((check_id = *device_list++) != 0) |
| 823 | if (check_id == device_id) |
| 824 | return 1; |
| 825 | } |
| 826 | |
| 827 | return (driver->device == device_id); |
| 828 | } |
| 829 | |
| 830 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 831 | * Set up PCI device operation. |
| 832 | * |
| 833 | * Check if it already has a driver. If not, use find_device_operations(), |
| 834 | * or set to a default based on type. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 835 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 836 | * @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] | 837 | * @see pci_drivers |
| 838 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 839 | static void set_pci_ops(struct device *dev) |
| 840 | { |
| 841 | struct pci_driver *driver; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 842 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 843 | if (dev->ops) |
| 844 | return; |
| 845 | |
| 846 | /* |
| 847 | * Look through the list of setup drivers and find one for |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 848 | * this PCI device. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 849 | */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 850 | for (driver = &pci_drivers[0]; driver != &epci_drivers[0]; driver++) { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 851 | if ((driver->vendor == dev->vendor) && |
Vadim Bendebury | 8049fc9 | 2012-04-24 12:53:19 -0700 | [diff] [blame] | 852 | device_id_match(driver, dev->device)) { |
Uwe Hermann | 312673c | 2009-10-27 21:49:33 +0000 | [diff] [blame] | 853 | dev->ops = (struct device_operations *)driver->ops; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 854 | printk(BIOS_SPEW, "%s [%04x/%04x] %sops\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 855 | dev_path(dev), driver->vendor, driver->device, |
| 856 | (driver->ops->scan_bus ? "bus " : "")); |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 857 | return; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 858 | } |
| 859 | } |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 860 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 861 | /* If I don't have a specific driver use the default operations. */ |
| 862 | switch (dev->hdr_type & 0x7f) { /* Header type */ |
| 863 | case PCI_HEADER_TYPE_NORMAL: |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 864 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) |
| 865 | goto bad; |
| 866 | dev->ops = &default_pci_ops_dev; |
| 867 | break; |
| 868 | case PCI_HEADER_TYPE_BRIDGE: |
| 869 | if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) |
| 870 | goto bad; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 871 | dev->ops = get_pci_bridge_ops(dev); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 872 | break; |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 873 | #if CONFIG_CARDBUS_PLUGIN_SUPPORT |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 874 | case PCI_HEADER_TYPE_CARDBUS: |
| 875 | dev->ops = &default_cardbus_ops_bus; |
| 876 | break; |
| 877 | #endif |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 878 | default: |
| 879 | bad: |
Li-Ta Lo | 69c5a90 | 2004-04-29 20:08:54 +0000 | [diff] [blame] | 880 | if (dev->enabled) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 881 | printk(BIOS_ERR, "%s [%04x/%04x/%06x] has unknown " |
| 882 | "header type %02x, ignoring.\n", dev_path(dev), |
| 883 | dev->vendor, dev->device, |
| 884 | dev->class >> 8, dev->hdr_type); |
Eric Biederman | 83b991a | 2003-10-11 06:20:25 +0000 | [diff] [blame] | 885 | } |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 886 | } |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 890 | * 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] | 891 | * |
| 892 | * 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] | 893 | * device structure correspond to the devfn, if present. This function also |
| 894 | * removes the device structure from the linked list. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 895 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 896 | * @param list The device structure list. |
| 897 | * @param devfn A device/function number. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 898 | * @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] | 899 | * allocated a device for this devfn yet. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 900 | */ |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 901 | 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] | 902 | { |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 903 | struct device *dev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 904 | |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 905 | dev = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 906 | for (; *list; list = &(*list)->sibling) { |
Eric Biederman | ad1b35a | 2003-10-14 02:36:51 +0000 | [diff] [blame] | 907 | if ((*list)->path.type != DEVICE_PATH_PCI) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 908 | printk(BIOS_ERR, "child %s not a PCI device\n", |
| 909 | dev_path(*list)); |
Eric Biederman | ad1b35a | 2003-10-14 02:36:51 +0000 | [diff] [blame] | 910 | continue; |
| 911 | } |
Stefan Reinauer | 2b34db8 | 2009-02-28 20:10:20 +0000 | [diff] [blame] | 912 | if ((*list)->path.pci.devfn == devfn) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 913 | /* Unlink from the list. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 914 | dev = *list; |
| 915 | *list = (*list)->sibling; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 916 | dev->sibling = NULL; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 917 | break; |
| 918 | } |
| 919 | } |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 920 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 921 | /* |
| 922 | * 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] | 923 | * bus. When the list of devices was formed we removed all of the |
| 924 | * parents children, and now we are interleaving static and dynamic |
| 925 | * devices in order on the bus. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 926 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 927 | if (dev) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 928 | struct device *child; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 929 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 930 | /* Find the last child of our parent. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 931 | for (child = dev->bus->children; child && child->sibling;) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 932 | child = child->sibling; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 933 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 934 | /* Place the device on the list of children of its parent. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 935 | if (child) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 936 | child->sibling = dev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 937 | else |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 938 | dev->bus->children = dev; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 939 | } |
| 940 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 941 | return dev; |
| 942 | } |
| 943 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 944 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 945 | * Scan a PCI bus. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 946 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 947 | * Determine the existence of a given PCI device. Allocate a new struct device |
| 948 | * if dev==NULL was passed in and the device exists in hardware. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 949 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 950 | * @param dev Pointer to the dev structure. |
| 951 | * @param bus Pointer to the bus structure. |
| 952 | * @param devfn A device/function number to look at. |
| 953 | * @return The device structure for the device (if found), NULL otherwise. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 954 | */ |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 955 | 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] | 956 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 957 | u32 id, class; |
| 958 | u8 hdr_type; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 959 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 960 | /* Detect if a device is present. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 961 | if (!dev) { |
| 962 | struct device dummy; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 963 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 964 | dummy.bus = bus; |
| 965 | dummy.path.type = DEVICE_PATH_PCI; |
Stefan Reinauer | 2b34db8 | 2009-02-28 20:10:20 +0000 | [diff] [blame] | 966 | dummy.path.pci.devfn = devfn; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 967 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 968 | id = pci_read_config32(&dummy, PCI_VENDOR_ID); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 969 | /* |
| 970 | * Have we found something? Some broken boards return 0 if a |
| 971 | * slot is empty, but the expected answer is 0xffffffff. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 972 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 973 | if (id == 0xffffffff) |
Stefan Reinauer | 7355c75 | 2010-04-02 16:30:25 +0000 | [diff] [blame] | 974 | return NULL; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 975 | |
Stefan Reinauer | 7355c75 | 2010-04-02 16:30:25 +0000 | [diff] [blame] | 976 | if ((id == 0x00000000) || (id == 0x0000ffff) || |
| 977 | (id == 0xffff0000)) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 978 | printk(BIOS_SPEW, "%s, bad id 0x%x\n", |
| 979 | dev_path(&dummy), id); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 980 | return NULL; |
| 981 | } |
| 982 | dev = alloc_dev(bus, &dummy.path); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 983 | } else { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 984 | /* |
| 985 | * Enable/disable the device. Once we have found the device- |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 986 | * specific operations this operations we will disable the |
| 987 | * device with those as well. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 988 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 989 | * This is geared toward devices that have subfunctions |
| 990 | * that do not show up by default. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 991 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 992 | * If a device is a stuff option on the motherboard |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 993 | * it may be absent and enable_dev() must cope. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 994 | */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 995 | /* Run the magic enable sequence for the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 996 | if (dev->chip_ops && dev->chip_ops->enable_dev) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 997 | dev->chip_ops->enable_dev(dev); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 998 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 999 | /* Now read the vendor and device ID. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1000 | id = pci_read_config32(dev, PCI_VENDOR_ID); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1001 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1002 | /* |
| 1003 | * If the device does not have a PCI ID disable it. Possibly |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1004 | * this is because we have already disabled the device. But |
| 1005 | * this also handles optional devices that may not always |
| 1006 | * show up. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1007 | */ |
| 1008 | /* If the chain is fully enumerated quit */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1009 | if ((id == 0xffffffff) || (id == 0x00000000) || |
| 1010 | (id == 0x0000ffff) || (id == 0xffff0000)) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1011 | if (dev->enabled) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1012 | printk(BIOS_INFO, "PCI: Static device %s not " |
| 1013 | "found, disabling it.\n", dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1014 | dev->enabled = 0; |
| 1015 | } |
| 1016 | return dev; |
| 1017 | } |
| 1018 | } |
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 | /* Read the rest of the PCI configuration information. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1021 | hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE); |
| 1022 | class = pci_read_config32(dev, PCI_CLASS_REVISION); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1023 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1024 | /* Store the interesting information in the device structure. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1025 | dev->vendor = id & 0xffff; |
| 1026 | dev->device = (id >> 16) & 0xffff; |
| 1027 | dev->hdr_type = hdr_type; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1028 | |
| 1029 | /* Class code, the upper 3 bytes of PCI_CLASS_REVISION. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1030 | dev->class = class >> 8; |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1031 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1032 | /* Architectural/System devices always need to be bus masters. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1033 | if ((dev->class >> 16) == PCI_BASE_CLASS_SYSTEM) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1034 | dev->command |= PCI_COMMAND_MASTER; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1035 | |
| 1036 | /* |
| 1037 | * 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] | 1038 | * class and figure out which set of configuration methods to use. |
| 1039 | * Unless we already have some PCI ops. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1040 | */ |
| 1041 | set_pci_ops(dev); |
| 1042 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1043 | /* Now run the magic enable/disable sequence for the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1044 | if (dev->ops && dev->ops->enable) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1045 | dev->ops->enable(dev); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1046 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1047 | /* Display the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1048 | printk(BIOS_DEBUG, "%s [%04x/%04x] %s%s\n", dev_path(dev), |
| 1049 | dev->vendor, dev->device, dev->enabled ? "enabled" : "disabled", |
| 1050 | dev->ops ? "" : " No operations"); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1051 | |
| 1052 | return dev; |
| 1053 | } |
| 1054 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1055 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1056 | * Scan a PCI bus. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1057 | * |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1058 | * Determine the existence of devices and bridges on a PCI bus. If there are |
| 1059 | * bridges on the bus, recursively scan the buses behind the bridges. |
| 1060 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1061 | * This function is the default scan_bus() method for the root device |
| 1062 | * 'dev_root'. |
| 1063 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1064 | * @param bus Pointer to the bus structure. |
| 1065 | * @param min_devfn Minimum devfn to look at in the scan, usually 0x00. |
| 1066 | * @param max_devfn Maximum devfn to look at in the scan, usually 0xff. |
| 1067 | * @param max Current bus number. |
| 1068 | * @return The maximum bus number found, after scanning all subordinate busses. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1069 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1070 | unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn, |
| 1071 | unsigned max_devfn, unsigned int max) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1072 | { |
| 1073 | unsigned int devfn; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1074 | struct device *old_devices; |
| 1075 | struct device *child; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1076 | |
Stefan Reinauer | 0867062 | 2009-06-30 15:17:49 +0000 | [diff] [blame] | 1077 | #if CONFIG_PCI_BUS_SEGN_BITS |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1078 | printk(BIOS_DEBUG, "PCI: pci_scan_bus for bus %04x:%02x\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1079 | bus->secondary >> 8, bus->secondary & 0xff); |
Yinghai Lu | 5f9624d | 2006-10-04 22:56:21 +0000 | [diff] [blame] | 1080 | #else |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1081 | 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] | 1082 | #endif |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1083 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1084 | /* Maximum sane devfn is 0xFF. */ |
Juhana Helovuo | 50b78b6 | 2010-09-13 14:43:02 +0000 | [diff] [blame] | 1085 | if (max_devfn > 0xff) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1086 | printk(BIOS_ERR, "PCI: pci_scan_bus limits devfn %x - " |
| 1087 | "devfn %x\n", min_devfn, max_devfn); |
| 1088 | printk(BIOS_ERR, "PCI: pci_scan_bus upper limit too big. " |
| 1089 | "Using 0xff.\n"); |
Juhana Helovuo | 50b78b6 | 2010-09-13 14:43:02 +0000 | [diff] [blame] | 1090 | max_devfn=0xff; |
| 1091 | } |
| 1092 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1093 | old_devices = bus->children; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1094 | bus->children = NULL; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1095 | |
| 1096 | post_code(0x24); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1097 | |
| 1098 | /* |
| 1099 | * Probe all devices/functions on this bus with some optimization for |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1100 | * non-existence and single function devices. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1101 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1102 | for (devfn = min_devfn; devfn <= max_devfn; devfn++) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1103 | struct device *dev; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1104 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1105 | /* First thing setup the device structure. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1106 | dev = pci_scan_get_dev(&old_devices, devfn); |
Li-Ta Lo | 9782f75 | 2004-05-05 21:15:42 +0000 | [diff] [blame] | 1107 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1108 | /* See if a device is present and setup the device structure. */ |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1109 | dev = pci_probe_dev(dev, bus, devfn); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 1110 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1111 | /* |
| 1112 | * If this is not a multi function device, or the device is |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1113 | * not present don't waste time probing another function. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1114 | * Skip to next device. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1115 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1116 | if ((PCI_FUNC(devfn) == 0x00) && (!dev |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1117 | || (dev->enabled && ((dev->hdr_type & 0x80) != 0x80)))) { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1118 | devfn += 0x07; |
| 1119 | } |
| 1120 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1121 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1122 | post_code(0x25); |
| 1123 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1124 | /* |
| 1125 | * Warn if any leftover static devices are are found. |
| 1126 | * There's probably a problem in devicetree.cb. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1127 | */ |
| 1128 | if (old_devices) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1129 | device_t left; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1130 | printk(BIOS_WARNING, "PCI: Left over static devices:\n"); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1131 | for (left = old_devices; left; left = left->sibling) |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1132 | printk(BIOS_WARNING, "%s\n", dev_path(left)); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1133 | |
| 1134 | printk(BIOS_WARNING, "PCI: Check your devicetree.cb.\n"); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1135 | } |
| 1136 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1137 | /* |
| 1138 | * For all children that implement scan_bus() (i.e. bridges) |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1139 | * scan the bus behind that child. |
| 1140 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1141 | for (child = bus->children; child; child = child->sibling) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1142 | max = scan_bus(child, max); |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1143 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1144 | /* |
| 1145 | * 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] | 1146 | * 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] | 1147 | * Return how far we've got finding sub-buses. |
| 1148 | */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1149 | 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] | 1150 | post_code(0x55); |
| 1151 | return max; |
| 1152 | } |
| 1153 | |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1154 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1155 | * Scan a PCI bridge and the buses behind the bridge. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1156 | * |
| 1157 | * Determine the existence of buses behind the bridge. Set up the bridge |
| 1158 | * according to the result of the scan. |
| 1159 | * |
| 1160 | * This function is the default scan_bus() method for PCI bridge devices. |
| 1161 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1162 | * @param dev Pointer to the bridge device. |
| 1163 | * @param max The highest bus number assigned up to now. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1164 | * @param do_scan_bus TODO |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1165 | * @return The maximum bus number found, after scanning all subordinate buses. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1166 | */ |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1167 | unsigned int do_pci_scan_bridge(struct device *dev, unsigned int max, |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1168 | unsigned int (*do_scan_bus) (struct bus * bus, |
| 1169 | unsigned min_devfn, |
| 1170 | unsigned max_devfn, |
| 1171 | unsigned int max)) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1172 | { |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1173 | struct bus *bus; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1174 | u32 buses; |
| 1175 | u16 cr; |
Eric Biederman | 83b991a | 2003-10-11 06:20:25 +0000 | [diff] [blame] | 1176 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1177 | printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(dev)); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1178 | |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 1179 | if (dev->link_list == NULL) { |
| 1180 | struct bus *link; |
| 1181 | link = malloc(sizeof(*link)); |
| 1182 | if (link == NULL) |
| 1183 | die("Couldn't allocate a link!\n"); |
| 1184 | memset(link, 0, sizeof(*link)); |
| 1185 | link->dev = dev; |
| 1186 | dev->link_list = link; |
| 1187 | } |
| 1188 | |
| 1189 | bus = dev->link_list; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1190 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1191 | /* |
| 1192 | * Set up the primary, secondary and subordinate bus numbers. We have |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1193 | * 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] | 1194 | * subordinate bus number to 0xff for the moment. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1195 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1196 | bus->secondary = ++max; |
| 1197 | bus->subordinate = 0xff; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1198 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1199 | /* 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] | 1200 | cr = pci_read_config16(dev, PCI_COMMAND); |
| 1201 | pci_write_config16(dev, PCI_COMMAND, 0x0000); |
| 1202 | pci_write_config16(dev, PCI_STATUS, 0xffff); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1203 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1204 | /* |
| 1205 | * Read the existing primary/secondary/subordinate bus |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1206 | * number configuration. |
| 1207 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1208 | buses = pci_read_config32(dev, PCI_PRIMARY_BUS); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1209 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1210 | /* |
| 1211 | * Configure the bus numbers for this bridge: the configuration |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1212 | * transactions will not be propagated by the bridge if it is not |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1213 | * correctly configured. |
| 1214 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1215 | buses &= 0xff000000; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1216 | buses |= (((unsigned int)(dev->bus->secondary) << 0) | |
| 1217 | ((unsigned int)(bus->secondary) << 8) | |
| 1218 | ((unsigned int)(bus->subordinate) << 16)); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1219 | pci_write_config32(dev, PCI_PRIMARY_BUS, buses); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1220 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1221 | /* Now we can scan all subordinate buses (those behind the bridge). */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1222 | max = do_scan_bus(bus, 0x00, 0xff, max); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1223 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1224 | /* |
| 1225 | * We know the number of buses behind this bridge. Set the subordinate |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1226 | * bus number to its real value. |
| 1227 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1228 | bus->subordinate = max; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1229 | buses = (buses & 0xff00ffff) | ((unsigned int)(bus->subordinate) << 16); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1230 | pci_write_config32(dev, PCI_PRIMARY_BUS, buses); |
| 1231 | pci_write_config16(dev, PCI_COMMAND, cr); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1232 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1233 | printk(BIOS_SPEW, "%s returns max %d\n", __func__, max); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1234 | return max; |
| 1235 | } |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1236 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1237 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1238 | * Scan a PCI bridge and the buses behind the bridge. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1239 | * |
| 1240 | * Determine the existence of buses behind the bridge. Set up the bridge |
| 1241 | * according to the result of the scan. |
| 1242 | * |
| 1243 | * This function is the default scan_bus() method for PCI bridge devices. |
| 1244 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1245 | * @param dev Pointer to the bridge device. |
| 1246 | * @param max The highest bus number assigned up to now. |
| 1247 | * @return The maximum bus number found, after scanning all subordinate buses. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1248 | */ |
| 1249 | unsigned int pci_scan_bridge(struct device *dev, unsigned int max) |
| 1250 | { |
| 1251 | return do_pci_scan_bridge(dev, max, pci_scan_bus); |
| 1252 | } |
| 1253 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1254 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1255 | * Scan a PCI domain. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1256 | * |
| 1257 | * This function is the default scan_bus() method for PCI domains. |
| 1258 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1259 | * @param dev Pointer to the domain. |
| 1260 | * @param max The highest bus number assigned up to now. |
| 1261 | * @return The maximum bus number found, after scanning all subordinate busses. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1262 | */ |
| 1263 | unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) |
| 1264 | { |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 1265 | 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] | 1266 | return max; |
| 1267 | } |
| 1268 | |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 1269 | #if CONFIG_PC80_SYSTEM |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1270 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1271 | * Assign IRQ numbers. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1272 | * |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1273 | * This function assigns IRQs for all functions contained within the indicated |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1274 | * 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] | 1275 | * then this function has no effect. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1276 | * |
| 1277 | * This function should be called for each PCI slot in your system. |
| 1278 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1279 | * @param bus Pointer to the bus structure. |
| 1280 | * @param slot TODO |
| 1281 | * @param pIntAtoD An array of IRQ #s that are assigned to PINTA through PINTD |
| 1282 | * of this slot. The particular IRQ #s that are passed in depend on the |
| 1283 | * routing inside your southbridge and on your board. |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1284 | */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1285 | void pci_assign_irqs(unsigned bus, unsigned slot, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1286 | const unsigned char pIntAtoD[4]) |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1287 | { |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1288 | unsigned int funct; |
| 1289 | device_t pdev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1290 | u8 line, irq; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1291 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1292 | /* Each slot may contain up to eight functions. */ |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1293 | for (funct = 0; funct < 8; funct++) { |
| 1294 | pdev = dev_find_slot(bus, (slot << 3) + funct); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1295 | |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1296 | if (!pdev) |
| 1297 | continue; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1298 | |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1299 | line = pci_read_config8(pdev, PCI_INTERRUPT_PIN); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1300 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1301 | /* PCI spec says all values except 1..4 are reserved. */ |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1302 | if ((line < 1) || (line > 4)) |
| 1303 | continue; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1304 | |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1305 | irq = pIntAtoD[line - 1]; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1306 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1307 | printk(BIOS_DEBUG, "Assigning IRQ %d to %d:%x.%d\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1308 | irq, bus, slot, funct); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1309 | |
Stefan Reinauer | 14e2277 | 2010-04-27 06:56:47 +0000 | [diff] [blame] | 1310 | pci_write_config8(pdev, PCI_INTERRUPT_LINE, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1311 | pIntAtoD[line - 1]); |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1312 | |
| 1313 | #ifdef PARANOID_IRQ_ASSIGNMENTS |
Myles Watson | 17aeeca | 2009-10-07 18:41:08 +0000 | [diff] [blame] | 1314 | irq = pci_read_config8(pdev, PCI_INTERRUPT_LINE); |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1315 | printk(BIOS_DEBUG, " Readback = %d\n", irq); |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1316 | #endif |
| 1317 | |
Patrick Georgi | e166782 | 2012-05-05 15:29:32 +0200 | [diff] [blame] | 1318 | #if CONFIG_PC80_SYSTEM |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1319 | /* Change to level triggered. */ |
| 1320 | i8259_configure_irq_trigger(pIntAtoD[line - 1], |
| 1321 | IRQ_LEVEL_TRIGGERED); |
Stefan Reinauer | 5fb6216 | 2010-12-16 23:52:04 +0000 | [diff] [blame] | 1322 | #endif |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1323 | } |
| 1324 | } |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1325 | #endif |