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Rev | Author | Line No. | Line |
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1301 | jermar | 1 | /* |
2 | * The PCI Library -- Generic Direct Access Functions |
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3 | * |
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4 | * Copyright (c) 1997--2000 Martin Mares <mj@ucw.cz> |
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5 | * |
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1324 | jermar | 6 | * May 8, 2006 - Modified and ported to HelenOS by Jakub Jermar. |
1301 | jermar | 7 | * |
8 | * Can be freely distributed and used under the terms of the GNU GPL. |
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9 | */ |
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10 | |||
11 | #include <string.h> |
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12 | |||
13 | #include "internal.h" |
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14 | |||
1302 | jermar | 15 | void pci_generic_scan_bus(struct pci_access *a, byte * busmap, int bus) |
1301 | jermar | 16 | { |
1302 | jermar | 17 | int dev, multi, ht; |
18 | struct pci_dev *t; |
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1301 | jermar | 19 | |
1302 | jermar | 20 | a->debug("Scanning bus %02x for devices...\n", bus); |
21 | if (busmap[bus]) { |
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22 | a->warning("Bus %02x seen twice (firmware bug). Ignored.", |
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23 | bus); |
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24 | return; |
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25 | } |
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26 | busmap[bus] = 1; |
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27 | t = pci_alloc_dev(a); |
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28 | t->bus = bus; |
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29 | for (dev = 0; dev < 32; dev++) { |
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30 | t->dev = dev; |
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31 | multi = 0; |
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32 | for (t->func = 0; !t->func || multi && t->func < 8; |
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33 | t->func++) { |
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34 | u32 vd = pci_read_long(t, PCI_VENDOR_ID); |
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35 | struct pci_dev *d; |
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1301 | jermar | 36 | |
1302 | jermar | 37 | if (!vd || vd == 0xffffffff) |
38 | continue; |
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39 | ht = pci_read_byte(t, PCI_HEADER_TYPE); |
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40 | if (!t->func) |
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41 | multi = ht & 0x80; |
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42 | ht &= 0x7f; |
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43 | d = pci_alloc_dev(a); |
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44 | d->bus = t->bus; |
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45 | d->dev = t->dev; |
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46 | d->func = t->func; |
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47 | d->vendor_id = vd & 0xffff; |
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48 | d->device_id = vd >> 16U; |
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49 | d->known_fields = PCI_FILL_IDENT; |
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50 | d->hdrtype = ht; |
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51 | pci_link_dev(a, d); |
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52 | switch (ht) { |
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53 | case PCI_HEADER_TYPE_NORMAL: |
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54 | break; |
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55 | case PCI_HEADER_TYPE_BRIDGE: |
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56 | case PCI_HEADER_TYPE_CARDBUS: |
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57 | pci_generic_scan_bus(a, busmap, |
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58 | pci_read_byte(t, |
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59 | PCI_SECONDARY_BUS)); |
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60 | break; |
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61 | default: |
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62 | a->debug |
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63 | ("Device %04x:%02x:%02x.%d has unknown header type %02x.\n", |
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64 | d->domain, d->bus, d->dev, d->func, |
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65 | ht); |
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66 | } |
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67 | } |
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1301 | jermar | 68 | } |
1302 | jermar | 69 | pci_free_dev(t); |
1301 | jermar | 70 | } |
71 | |||
1302 | jermar | 72 | void pci_generic_scan(struct pci_access *a) |
1301 | jermar | 73 | { |
1302 | jermar | 74 | byte busmap[256]; |
1301 | jermar | 75 | |
1302 | jermar | 76 | bzero(busmap, sizeof(busmap)); |
77 | pci_generic_scan_bus(a, busmap, 0); |
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1301 | jermar | 78 | } |
79 | |||
1302 | jermar | 80 | int pci_generic_fill_info(struct pci_dev *d, int flags) |
1301 | jermar | 81 | { |
1302 | jermar | 82 | struct pci_access *a = d->access; |
1301 | jermar | 83 | |
1302 | jermar | 84 | if ((flags & (PCI_FILL_BASES | PCI_FILL_ROM_BASE)) |
85 | && d->hdrtype < 0) |
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86 | d->hdrtype = pci_read_byte(d, PCI_HEADER_TYPE) & 0x7f; |
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87 | if (flags & PCI_FILL_IDENT) { |
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88 | d->vendor_id = pci_read_word(d, PCI_VENDOR_ID); |
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89 | d->device_id = pci_read_word(d, PCI_DEVICE_ID); |
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1301 | jermar | 90 | } |
1302 | jermar | 91 | if (flags & PCI_FILL_IRQ) |
92 | d->irq = pci_read_byte(d, PCI_INTERRUPT_LINE); |
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93 | if (flags & PCI_FILL_BASES) { |
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94 | int cnt = 0, i; |
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95 | bzero(d->base_addr, sizeof(d->base_addr)); |
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96 | switch (d->hdrtype) { |
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97 | case PCI_HEADER_TYPE_NORMAL: |
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98 | cnt = 6; |
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99 | break; |
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100 | case PCI_HEADER_TYPE_BRIDGE: |
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101 | cnt = 2; |
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102 | break; |
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103 | case PCI_HEADER_TYPE_CARDBUS: |
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104 | cnt = 1; |
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105 | break; |
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106 | } |
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107 | if (cnt) { |
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108 | for (i = 0; i < cnt; i++) { |
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1324 | jermar | 109 | u32 x = pci_read_long(d, PCI_BASE_ADDRESS_0 + i * 4); |
1302 | jermar | 110 | if (!x || x == (u32) ~ 0) |
111 | continue; |
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1324 | jermar | 112 | if ((x & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) |
1302 | jermar | 113 | d->base_addr[i] = x; |
114 | else { |
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1324 | jermar | 115 | if ((x & PCI_BASE_ADDRESS_MEM_TYPE_MASK) != PCI_BASE_ADDRESS_MEM_TYPE_64) |
1302 | jermar | 116 | d->base_addr[i] = x; |
117 | else if (i >= cnt - 1) |
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1324 | jermar | 118 | a->warning("%04x:%02x:%02x.%d: Invalid 64-bit address seen for BAR %d.", |
1302 | jermar | 119 | d->domain, d->bus, |
120 | d->dev, d->func, i); |
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121 | else { |
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1324 | jermar | 122 | u32 y = pci_read_long(d, PCI_BASE_ADDRESS_0 + (++i) * 4); |
1301 | jermar | 123 | #ifdef PCI_HAVE_64BIT_ADDRESS |
1324 | jermar | 124 | d->base_addr[i - 1] = x | (((pciaddr_t) y) << 32); |
1301 | jermar | 125 | #else |
1302 | jermar | 126 | if (y) |
1324 | jermar | 127 | a->warning("%04x:%02x:%02x.%d 64-bit device address ignored.", |
1302 | jermar | 128 | d->domain, |
129 | d->bus, |
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130 | d->dev, |
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131 | d->func); |
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132 | else |
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1324 | jermar | 133 | d->base_addr[i - 1] = x; |
1301 | jermar | 134 | #endif |
1302 | jermar | 135 | } |
136 | } |
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137 | } |
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1301 | jermar | 138 | } |
139 | } |
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1302 | jermar | 140 | if (flags & PCI_FILL_ROM_BASE) { |
141 | int reg = 0; |
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142 | d->rom_base_addr = 0; |
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143 | switch (d->hdrtype) { |
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144 | case PCI_HEADER_TYPE_NORMAL: |
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145 | reg = PCI_ROM_ADDRESS; |
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146 | break; |
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147 | case PCI_HEADER_TYPE_BRIDGE: |
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148 | reg = PCI_ROM_ADDRESS1; |
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149 | break; |
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150 | } |
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151 | if (reg) { |
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152 | u32 u = pci_read_long(d, reg); |
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153 | if (u != 0xffffffff) |
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154 | d->rom_base_addr = u; |
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155 | } |
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1301 | jermar | 156 | } |
1302 | jermar | 157 | return flags & ~PCI_FILL_SIZES; |
1301 | jermar | 158 | } |
159 | |||
160 | static int |
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1302 | jermar | 161 | pci_generic_block_op(struct pci_dev *d, int pos, byte * buf, int len, |
162 | int (*r) (struct pci_dev * d, int pos, byte * buf, |
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163 | int len)) |
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1301 | jermar | 164 | { |
1302 | jermar | 165 | if ((pos & 1) && len >= 1) { |
166 | if (!r(d, pos, buf, 1)) |
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167 | return 0; |
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168 | pos++; |
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169 | buf++; |
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170 | len--; |
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171 | } |
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172 | if ((pos & 3) && len >= 2) { |
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173 | if (!r(d, pos, buf, 2)) |
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174 | return 0; |
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175 | pos += 2; |
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176 | buf += 2; |
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177 | len -= 2; |
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178 | } |
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179 | while (len >= 4) { |
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180 | if (!r(d, pos, buf, 4)) |
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181 | return 0; |
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182 | pos += 4; |
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183 | buf += 4; |
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184 | len -= 4; |
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185 | } |
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186 | if (len >= 2) { |
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187 | if (!r(d, pos, buf, 2)) |
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188 | return 0; |
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189 | pos += 2; |
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190 | buf += 2; |
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191 | len -= 2; |
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192 | } |
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193 | if (len && !r(d, pos, buf, 1)) |
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194 | return 0; |
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195 | return 1; |
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1301 | jermar | 196 | } |
197 | |||
1302 | jermar | 198 | int pci_generic_block_read(struct pci_dev *d, int pos, byte * buf, int len) |
1301 | jermar | 199 | { |
1324 | jermar | 200 | return pci_generic_block_op(d, pos, buf, len, d->access->methods->read); |
1301 | jermar | 201 | } |
202 | |||
1302 | jermar | 203 | int pci_generic_block_write(struct pci_dev *d, int pos, byte * buf, int len) |
1301 | jermar | 204 | { |
1324 | jermar | 205 | return pci_generic_block_op(d, pos, buf, len, d->access->methods->write); |
1301 | jermar | 206 | } |