1 | #ifndef PCI_H
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2 | #define PCI_H
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3 |
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4 | /*
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5 | ** Support for NE2000 PCI clones added David Monro June 1997
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6 | ** Generalised for other PCI NICs by Ken Yap July 1997
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7 | **
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8 | ** Most of this is taken from:
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9 | **
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10 | ** /usr/src/linux/drivers/pci/pci.c
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11 | ** /usr/src/linux/include/linux/pci.h
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12 | ** /usr/src/linux/arch/i386/bios32.c
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13 | ** /usr/src/linux/include/linux/bios32.h
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14 | ** /usr/src/linux/drivers/net/ne.c
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15 | */
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16 |
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17 | /*
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18 | * This program is free software; you can redistribute it and/or
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19 | * modify it under the terms of the GNU General Public License as
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20 | * published by the Free Software Foundation; either version 2, or (at
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21 | * your option) any later version.
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22 | */
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23 |
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24 | /*
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25 | * Sun GPL Disclaimer: For the avoidance of doubt, except that if any license choice
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26 | * other than GPL or LGPL is available it will apply instead, Sun elects to use only
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27 | * the General Public License version 2 (GPLv2) at this time for any software where
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28 | * a choice of GPL license versions is made available with the language indicating
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29 | * that GPLv2 or any later version may be used, or where a choice of which version
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30 | * of the GPL is applied is otherwise unspecified.
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31 | */
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32 |
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33 | #include "pci_ids.h"
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34 |
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35 | #define PCI_COMMAND_IO 0x1 /* Enable response in I/O space */
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36 | #define PCI_COMMAND_MEM 0x2 /* Enable response in mem space */
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37 | #define PCI_COMMAND_MASTER 0x4 /* Enable bus mastering */
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38 | #define PCI_LATENCY_TIMER 0x0d /* 8 bits */
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39 | #define PCI_COMMAND_SPECIAL 0x8 /* Enable response to special cycles */
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40 | #define PCI_COMMAND_INVALIDATE 0x10 /* Use memory write and invalidate */
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41 | #define PCI_COMMAND_VGA_PALETTE 0x20 /* Enable palette snooping */
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42 | #define PCI_COMMAND_PARITY 0x40 /* Enable parity checking */
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43 | #define PCI_COMMAND_WAIT 0x80 /* Enable address/data stepping */
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44 | #define PCI_COMMAND_SERR 0x100 /* Enable SERR */
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45 | #define PCI_COMMAND_FAST_BACK 0x200 /* Enable back-to-back writes */
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46 |
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47 | #define PCIBIOS_PCI_FUNCTION_ID 0xb1XX
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48 | #define PCIBIOS_PCI_BIOS_PRESENT 0xb101
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49 | #define PCIBIOS_FIND_PCI_DEVICE 0xb102
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50 | #define PCIBIOS_FIND_PCI_CLASS_CODE 0xb103
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51 | #define PCIBIOS_GENERATE_SPECIAL_CYCLE 0xb106
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52 | #define PCIBIOS_READ_CONFIG_BYTE 0xb108
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53 | #define PCIBIOS_READ_CONFIG_WORD 0xb109
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54 | #define PCIBIOS_READ_CONFIG_DWORD 0xb10a
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55 | #define PCIBIOS_WRITE_CONFIG_BYTE 0xb10b
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56 | #define PCIBIOS_WRITE_CONFIG_WORD 0xb10c
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57 | #define PCIBIOS_WRITE_CONFIG_DWORD 0xb10d
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58 |
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59 | #define PCI_VENDOR_ID 0x00 /* 16 bits */
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60 | #define PCI_DEVICE_ID 0x02 /* 16 bits */
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61 | #define PCI_COMMAND 0x04 /* 16 bits */
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62 |
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63 | #define PCI_STATUS 0x06 /* 16 bits */
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64 | #define PCI_STATUS_CAP_LIST 0x10 /* Support Capability List */
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65 | #define PCI_STATUS_66MHZ 0x20 /* Support 66 Mhz PCI 2.1 bus */
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66 | #define PCI_STATUS_UDF 0x40 /* Support User Definable Features [obsolete] */
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67 | #define PCI_STATUS_FAST_BACK 0x80 /* Accept fast-back to back */
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68 | #define PCI_STATUS_PARITY 0x100 /* Detected parity error */
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69 | #define PCI_STATUS_DEVSEL_MASK 0x600 /* DEVSEL timing */
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70 | #define PCI_STATUS_DEVSEL_FAST 0x000
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71 | #define PCI_STATUS_DEVSEL_MEDIUM 0x200
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72 | #define PCI_STATUS_DEVSEL_SLOW 0x400
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73 | #define PCI_STATUS_SIG_TARGET_ABORT 0x800 /* Set on target abort */
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74 | #define PCI_STATUS_REC_TARGET_ABORT 0x1000 /* Master ack of " */
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75 | #define PCI_STATUS_REC_MASTER_ABORT 0x2000 /* Set on master abort */
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76 | #define PCI_STATUS_SIG_SYSTEM_ERROR 0x4000 /* Set when we drive SERR */
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77 | #define PCI_STATUS_DETECTED_PARITY 0x8000 /* Set on parity error */
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78 |
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79 | #define PCI_REVISION 0x08 /* 8 bits */
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80 | #define PCI_REVISION_ID 0x08 /* 8 bits */
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81 | #define PCI_CLASS_REVISION 0x08 /* 32 bits */
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82 | #define PCI_CLASS_CODE 0x0b /* 8 bits */
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83 | #define PCI_SUBCLASS_CODE 0x0a /* 8 bits */
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84 | #define PCI_HEADER_TYPE 0x0e /* 8 bits */
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85 | #define PCI_HEADER_TYPE_NORMAL 0
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86 | #define PCI_HEADER_TYPE_BRIDGE 1
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87 | #define PCI_HEADER_TYPE_CARDBUS 2
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88 |
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89 |
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90 | /* Header type 0 (normal devices) */
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91 | #define PCI_CARDBUS_CIS 0x28
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92 | #define PCI_SUBSYSTEM_VENDOR_ID 0x2c
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93 | #define PCI_SUBSYSTEM_ID 0x2e
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94 |
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95 | #define PCI_BASE_ADDRESS_0 0x10 /* 32 bits */
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96 | #define PCI_BASE_ADDRESS_1 0x14 /* 32 bits */
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97 | #define PCI_BASE_ADDRESS_2 0x18 /* 32 bits */
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98 | #define PCI_BASE_ADDRESS_3 0x1c /* 32 bits */
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99 | #define PCI_BASE_ADDRESS_4 0x20 /* 32 bits */
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100 | #define PCI_BASE_ADDRESS_5 0x24 /* 32 bits */
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101 |
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102 | #define PCI_BASE_ADDRESS_MEM_TYPE_MASK 0x06
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103 | #define PCI_BASE_ADDRESS_MEM_TYPE_32 0x00 /* 32 bit address */
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104 | #define PCI_BASE_ADDRESS_MEM_TYPE_1M 0x02 /* Below 1M [obsolete] */
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105 | #define PCI_BASE_ADDRESS_MEM_TYPE_64 0x04 /* 64 bit address */
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106 |
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107 | #ifndef PCI_BASE_ADDRESS_IO_MASK
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108 | #define PCI_BASE_ADDRESS_IO_MASK (~0x03)
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109 | #endif
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110 | #ifndef PCI_BASE_ADDRESS_MEM_MASK
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111 | #define PCI_BASE_ADDRESS_MEM_MASK (~0x0f)
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112 | #endif
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113 | #define PCI_BASE_ADDRESS_SPACE_IO 0x01
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114 | #define PCI_ROM_ADDRESS 0x30 /* 32 bits */
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115 | #define PCI_ROM_ADDRESS_ENABLE 0x01 /* Write 1 to enable ROM,
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116 | bits 31..11 are address,
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117 | 10..2 are reserved */
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118 |
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119 | #define PCI_CAPABILITY_LIST 0x34 /* Offset of first capability list entry */
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120 |
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121 | #define PCI_INTERRUPT_LINE 0x3c /* IRQ number (0-15) */
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122 | #define PCI_INTERRUPT_PIN 0x3d /* IRQ pin on PCI bus (A-D) */
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123 |
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124 | /* Header type 1 (PCI-to-PCI bridges) */
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125 | #define PCI_PRIMARY_BUS 0x18 /* Primary bus number */
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126 | #define PCI_SECONDARY_BUS 0x19 /* Secondary bus number */
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127 | #define PCI_SUBORDINATE_BUS 0x1a /* Highest bus number behind the bridge */
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128 | #define PCI_SEC_LATENCY_TIMER 0x1b /* Latency timer for secondary interface */
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129 | #define PCI_IO_BASE 0x1c /* I/O range behind the bridge */
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130 | #define PCI_IO_LIMIT 0x1d
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131 | #define PCI_IO_RANGE_TYPE_MASK 0x0f /* I/O bridging type */
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132 | #define PCI_IO_RANGE_TYPE_16 0x00
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133 | #define PCI_IO_RANGE_TYPE_32 0x01
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134 | #define PCI_IO_RANGE_MASK ~0x0f
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135 | #define PCI_SEC_STATUS 0x1e /* Secondary status register, only bit 14 used */
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136 | #define PCI_MEMORY_BASE 0x20 /* Memory range behind */
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137 | #define PCI_MEMORY_LIMIT 0x22
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138 | #define PCI_MEMORY_RANGE_TYPE_MASK 0x0f
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139 | #define PCI_MEMORY_RANGE_MASK ~0x0f
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140 | #define PCI_PREF_MEMORY_BASE 0x24 /* Prefetchable memory range behind */
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141 | #define PCI_PREF_MEMORY_LIMIT 0x26
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142 | #define PCI_PREF_RANGE_TYPE_MASK 0x0f
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143 | #define PCI_PREF_RANGE_TYPE_32 0x00
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144 | #define PCI_PREF_RANGE_TYPE_64 0x01
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145 | #define PCI_PREF_RANGE_MASK ~0x0f
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146 | #define PCI_PREF_BASE_UPPER32 0x28 /* Upper half of prefetchable memory range */
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147 | #define PCI_PREF_LIMIT_UPPER32 0x2c
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148 | #define PCI_IO_BASE_UPPER16 0x30 /* Upper half of I/O addresses */
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149 | #define PCI_IO_LIMIT_UPPER16 0x32
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150 | /* 0x34 same as for htype 0 */
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151 | /* 0x35-0x3b is reserved */
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152 | #define PCI_ROM_ADDRESS1 0x38 /* Same as PCI_ROM_ADDRESS, but for htype 1 */
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153 | /* 0x3c-0x3d are same as for htype 0 */
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154 | #define PCI_BRIDGE_CONTROL 0x3e
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155 | #define PCI_BRIDGE_CTL_PARITY 0x01 /* Enable parity detection on secondary interface */
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156 | #define PCI_BRIDGE_CTL_SERR 0x02 /* The same for SERR forwarding */
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157 | #define PCI_BRIDGE_CTL_NO_ISA 0x04 /* Disable bridging of ISA ports */
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158 | #define PCI_BRIDGE_CTL_VGA 0x08 /* Forward VGA addresses */
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159 | #define PCI_BRIDGE_CTL_MASTER_ABORT 0x20 /* Report master aborts */
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160 | #define PCI_BRIDGE_CTL_BUS_RESET 0x40 /* Secondary bus reset */
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161 | #define PCI_BRIDGE_CTL_FAST_BACK 0x80 /* Fast Back2Back enabled on secondary interface */
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162 |
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163 | #define PCI_CB_CAPABILITY_LIST 0x14
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164 |
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165 | /* Capability lists */
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166 |
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167 | #define PCI_CAP_LIST_ID 0 /* Capability ID */
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168 | #define PCI_CAP_ID_PM 0x01 /* Power Management */
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169 | #define PCI_CAP_ID_AGP 0x02 /* Accelerated Graphics Port */
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170 | #define PCI_CAP_ID_VPD 0x03 /* Vital Product Data */
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171 | #define PCI_CAP_ID_SLOTID 0x04 /* Slot Identification */
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172 | #define PCI_CAP_ID_MSI 0x05 /* Message Signalled Interrupts */
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173 | #define PCI_CAP_ID_CHSWP 0x06 /* CompactPCI HotSwap */
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174 | #define PCI_CAP_LIST_NEXT 1 /* Next capability in the list */
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175 | #define PCI_CAP_FLAGS 2 /* Capability defined flags (16 bits) */
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176 | #define PCI_CAP_SIZEOF 4
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177 |
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178 | /* Power Management Registers */
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179 |
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180 | #define PCI_PM_PMC 2 /* PM Capabilities Register */
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181 | #define PCI_PM_CAP_VER_MASK 0x0007 /* Version */
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182 | #define PCI_PM_CAP_PME_CLOCK 0x0008 /* PME clock required */
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183 | #define PCI_PM_CAP_RESERVED 0x0010 /* Reserved field */
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184 | #define PCI_PM_CAP_DSI 0x0020 /* Device specific initialization */
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185 | #define PCI_PM_CAP_AUX_POWER 0x01C0 /* Auxilliary power support mask */
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186 | #define PCI_PM_CAP_D1 0x0200 /* D1 power state support */
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187 | #define PCI_PM_CAP_D2 0x0400 /* D2 power state support */
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188 | #define PCI_PM_CAP_PME 0x0800 /* PME pin supported */
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189 | #define PCI_PM_CAP_PME_MASK 0xF800 /* PME Mask of all supported states */
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190 | #define PCI_PM_CAP_PME_D0 0x0800 /* PME# from D0 */
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191 | #define PCI_PM_CAP_PME_D1 0x1000 /* PME# from D1 */
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192 | #define PCI_PM_CAP_PME_D2 0x2000 /* PME# from D2 */
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193 | #define PCI_PM_CAP_PME_D3 0x4000 /* PME# from D3 (hot) */
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194 | #define PCI_PM_CAP_PME_D3cold 0x8000 /* PME# from D3 (cold) */
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195 | #define PCI_PM_CTRL 4 /* PM control and status register */
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196 | #define PCI_PM_CTRL_STATE_MASK 0x0003 /* Current power state (D0 to D3) */
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197 | #define PCI_PM_CTRL_PME_ENABLE 0x0100 /* PME pin enable */
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198 | #define PCI_PM_CTRL_DATA_SEL_MASK 0x1e00 /* Data select (??) */
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199 | #define PCI_PM_CTRL_DATA_SCALE_MASK 0x6000 /* Data scale (??) */
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200 | #define PCI_PM_CTRL_PME_STATUS 0x8000 /* PME pin status */
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201 | #define PCI_PM_PPB_EXTENSIONS 6 /* PPB support extensions (??) */
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202 | #define PCI_PM_PPB_B2_B3 0x40 /* Stop clock when in D3hot (??) */
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203 | #define PCI_PM_BPCC_ENABLE 0x80 /* Bus power/clock control enable (??) */
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204 | #define PCI_PM_DATA_REGISTER 7 /* (??) */
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205 | #define PCI_PM_SIZEOF 8
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206 |
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207 | /* AGP registers */
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208 |
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209 | #define PCI_AGP_VERSION 2 /* BCD version number */
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210 | #define PCI_AGP_RFU 3 /* Rest of capability flags */
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211 | #define PCI_AGP_STATUS 4 /* Status register */
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212 | #define PCI_AGP_STATUS_RQ_MASK 0xff000000 /* Maximum number of requests - 1 */
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213 | #define PCI_AGP_STATUS_SBA 0x0200 /* Sideband addressing supported */
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214 | #define PCI_AGP_STATUS_64BIT 0x0020 /* 64-bit addressing supported */
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215 | #define PCI_AGP_STATUS_FW 0x0010 /* FW transfers supported */
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216 | #define PCI_AGP_STATUS_RATE4 0x0004 /* 4x transfer rate supported */
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217 | #define PCI_AGP_STATUS_RATE2 0x0002 /* 2x transfer rate supported */
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218 | #define PCI_AGP_STATUS_RATE1 0x0001 /* 1x transfer rate supported */
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219 | #define PCI_AGP_COMMAND 8 /* Control register */
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220 | #define PCI_AGP_COMMAND_RQ_MASK 0xff000000 /* Master: Maximum number of requests */
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221 | #define PCI_AGP_COMMAND_SBA 0x0200 /* Sideband addressing enabled */
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222 | #define PCI_AGP_COMMAND_AGP 0x0100 /* Allow processing of AGP transactions */
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223 | #define PCI_AGP_COMMAND_64BIT 0x0020 /* Allow processing of 64-bit addresses */
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224 | #define PCI_AGP_COMMAND_FW 0x0010 /* Force FW transfers */
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225 | #define PCI_AGP_COMMAND_RATE4 0x0004 /* Use 4x rate */
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226 | #define PCI_AGP_COMMAND_RATE2 0x0002 /* Use 2x rate */
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227 | #define PCI_AGP_COMMAND_RATE1 0x0001 /* Use 1x rate */
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228 | #define PCI_AGP_SIZEOF 12
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229 |
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230 | /* Slot Identification */
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231 |
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232 | #define PCI_SID_ESR 2 /* Expansion Slot Register */
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233 | #define PCI_SID_ESR_NSLOTS 0x1f /* Number of expansion slots available */
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234 | #define PCI_SID_ESR_FIC 0x20 /* First In Chassis Flag */
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235 | #define PCI_SID_CHASSIS_NR 3 /* Chassis Number */
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236 |
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237 | /* Message Signalled Interrupts registers */
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238 |
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239 | #define PCI_MSI_FLAGS 2 /* Various flags */
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240 | #define PCI_MSI_FLAGS_64BIT 0x80 /* 64-bit addresses allowed */
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241 | #define PCI_MSI_FLAGS_QSIZE 0x70 /* Message queue size configured */
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242 | #define PCI_MSI_FLAGS_QMASK 0x0e /* Maximum queue size available */
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243 | #define PCI_MSI_FLAGS_ENABLE 0x01 /* MSI feature enabled */
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244 | #define PCI_MSI_RFU 3 /* Rest of capability flags */
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245 | #define PCI_MSI_ADDRESS_LO 4 /* Lower 32 bits */
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246 | #define PCI_MSI_ADDRESS_HI 8 /* Upper 32 bits (if PCI_MSI_FLAGS_64BIT set) */
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247 | #define PCI_MSI_DATA_32 8 /* 16 bits of data for 32-bit devices */
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248 | #define PCI_MSI_DATA_64 12 /* 16 bits of data for 64-bit devices */
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249 |
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250 | #define PCI_SLOT(devfn) ((devfn) >> 3)
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251 | #define PCI_FUNC(devfn) ((devfn) & 0x07)
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252 |
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253 | #define BIOS32_SIGNATURE (('_' << 0) + ('3' << 8) + ('2' << 16) + ('_' << 24))
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254 |
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255 | /* PCI signature: "PCI " */
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256 | #define PCI_SIGNATURE (('P' << 0) + ('C' << 8) + ('I' << 16) + (' ' << 24))
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257 |
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258 | /* PCI service signature: "$PCI" */
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259 | #define PCI_SERVICE (('$' << 0) + ('P' << 8) + ('C' << 16) + ('I' << 24))
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260 |
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261 | union bios32 {
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262 | struct {
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263 | unsigned long signature; /* _32_ */
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264 | unsigned long entry; /* 32 bit physical address */
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265 | unsigned char revision; /* Revision level, 0 */
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266 | unsigned char length; /* Length in paragraphs should be 01 */
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267 | unsigned char checksum; /* All bytes must add up to zero */
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268 | unsigned char reserved[5]; /* Must be zero */
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269 | } fields;
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270 | char chars[16];
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271 | };
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272 |
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273 | struct pci_device;
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274 | struct dev;
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275 | typedef int (*pci_probe_t)(struct dev *, struct pci_device *);
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276 |
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277 | struct pci_device {
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278 | uint32_t class;
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279 | uint16_t vendor, dev_id;
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280 | const char *name;
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281 | /* membase and ioaddr are silly and depricated */
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282 | unsigned int membase;
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283 | unsigned int ioaddr;
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284 | unsigned int romaddr;
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285 | unsigned char irq;
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286 | unsigned char devfn;
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287 | unsigned char bus;
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288 | unsigned char use_specified;
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289 | const struct pci_driver *driver;
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290 | };
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291 |
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292 | extern void scan_pci_bus(int type, struct pci_device *dev);
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293 | extern void find_pci(int type, struct pci_device *dev);
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294 |
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295 | extern int pcibios_read_config_byte(unsigned int bus, unsigned int device_fn, unsigned int where, uint8_t *value);
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296 | extern int pcibios_write_config_byte (unsigned int bus, unsigned int device_fn, unsigned int where, uint8_t value);
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297 | extern int pcibios_read_config_word(unsigned int bus, unsigned int device_fn, unsigned int where, uint16_t *value);
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298 | extern int pcibios_write_config_word (unsigned int bus, unsigned int device_fn, unsigned int where, uint16_t value);
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299 | extern int pcibios_read_config_dword(unsigned int bus, unsigned int device_fn, unsigned int where, uint32_t *value);
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300 | extern int pcibios_write_config_dword(unsigned int bus, unsigned int device_fn, unsigned int where, uint32_t value);
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301 | extern unsigned long pcibios_bus_base(unsigned int bus);
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302 | extern void adjust_pci_device(struct pci_device *p);
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303 |
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304 |
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305 | static inline int
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306 | pci_read_config_byte(struct pci_device *dev, unsigned int where, uint8_t *value)
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307 | {
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308 | return pcibios_read_config_byte(dev->bus, dev->devfn, where, value);
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309 | }
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310 | static inline int
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311 | pci_write_config_byte(struct pci_device *dev, unsigned int where, uint8_t value)
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312 | {
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313 | return pcibios_write_config_byte(dev->bus, dev->devfn, where, value);
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314 | }
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315 | static inline int
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316 | pci_read_config_word(struct pci_device *dev, unsigned int where, uint16_t *value)
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317 | {
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318 | return pcibios_read_config_word(dev->bus, dev->devfn, where, value);
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319 | }
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320 | static inline int
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321 | pci_write_config_word(struct pci_device *dev, unsigned int where, uint16_t value)
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322 | {
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323 | return pcibios_write_config_word(dev->bus, dev->devfn, where, value);
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324 | }
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325 | static inline int
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326 | pci_read_config_dword(struct pci_device *dev, unsigned int where, uint32_t *value)
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327 | {
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328 | return pcibios_read_config_dword(dev->bus, dev->devfn, where, value);
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329 | }
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330 | static inline int
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331 | pci_write_config_dword(struct pci_device *dev, unsigned int where, uint32_t value)
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332 | {
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333 | return pcibios_write_config_dword(dev->bus, dev->devfn, where, value);
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334 | }
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335 |
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336 | /* Helper functions to find the size of a pci bar */
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337 | extern unsigned long pci_bar_start(struct pci_device *dev, unsigned int bar);
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338 | extern unsigned long pci_bar_size(struct pci_device *dev, unsigned int bar);
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339 | /* Helper function to find pci capabilities */
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340 | extern int pci_find_capability(struct pci_device *dev, int cap);
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341 | struct pci_id {
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342 | unsigned short vendor, dev_id;
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343 | const char *name;
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344 | };
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345 |
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346 | struct dev;
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347 | /* Most pci drivers will use this */
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348 | struct pci_driver {
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349 | int type;
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350 | const char *name;
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351 | pci_probe_t probe;
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352 | struct pci_id *ids;
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353 | int id_count;
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354 |
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355 | /* On a few occasions the hardware is standardized enough that
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356 | * we only need to know the class of the device and not the exact
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357 | * type to drive the device correctly. If this is the case
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358 | * set a class value other than 0.
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359 | */
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360 | unsigned short class;
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361 | };
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362 |
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363 | #define __pci_driver __attribute__ ((used,__section__(".drivers.pci")))
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364 | /* Defined by the linker... */
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365 | extern const struct pci_driver pci_drivers[];
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366 | extern const struct pci_driver pci_drivers_end[];
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367 |
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368 | #define PCI_ROM(VENDOR_ID, DEVICE_ID, IMAGE, DESCRIPTION) \
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369 | { VENDOR_ID, DEVICE_ID, IMAGE, }
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370 |
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371 | #endif /* PCI_H */
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