1 /* 2 * The PCI Library -- Generic Direct Access Functions 3 * 4 * Copyright (c) 1997--2000 Martin Mares <[email protected]> 5 * 6 * Can be freely distributed and used under the terms of the GNU GPL. 7 */ 8 9 #include <string.h> 10 11 #include "internal.h" 12 13 void 14 pci_generic_scan_bus(struct pci_access *a, byte *busmap, int bus) 15 { 16 int dev, multi, ht; 17 struct pci_dev *t; 18 19 a->debug("Scanning bus %02x for devices...\n", bus); 20 if (busmap[bus]) 21 { 22 a->warning("Bus %02x seen twice (firmware bug). Ignored.", bus); 23 return; 24 } 25 busmap[bus] = 1; 26 t = pci_alloc_dev(a); 27 t->bus = bus; 28 for(dev=0; dev<32; dev++) 29 { 30 t->dev = dev; 31 multi = 0; 32 for(t->func=0; !t->func || multi && t->func<8; t->func++) 33 { 34 u32 vd = pci_read_long(t, PCI_VENDOR_ID); 35 struct pci_dev *d; 36 37 if (!vd || vd == 0xffffffff) 38 continue; 39 ht = pci_read_byte(t, PCI_HEADER_TYPE); 40 if (!t->func) 41 multi = ht & 0x80; 42 ht &= 0x7f; 43 d = pci_alloc_dev(a); 44 d->bus = t->bus; 45 d->dev = t->dev; 46 d->func = t->func; 47 d->vendor_id = vd & 0xffff; 48 d->device_id = vd >> 16U; 49 d->known_fields = PCI_FILL_IDENT; 50 d->hdrtype = ht; 51 pci_link_dev(a, d); 52 switch (ht) 53 { 54 case PCI_HEADER_TYPE_NORMAL: 55 break; 56 case PCI_HEADER_TYPE_BRIDGE: 57 case PCI_HEADER_TYPE_CARDBUS: 58 pci_generic_scan_bus(a, busmap, pci_read_byte(t, PCI_SECONDARY_BUS)); 59 break; 60 default: 61 a->debug("Device %04x:%02x:%02x.%d has unknown header type %02x.\n", d->domain, d->bus, d->dev, d->func, ht); 62 } 63 } 64 } 65 pci_free_dev(t); 66 } 67 68 void 69 pci_generic_scan(struct pci_access *a) 70 { 71 byte busmap[256]; 72 73 bzero(busmap, sizeof(busmap)); 74 pci_generic_scan_bus(a, busmap, 0); 75 } 76 77 int 78 pci_generic_fill_info(struct pci_dev *d, int flags) 79 { 80 struct pci_access *a = d->access; 81 82 if ((flags & (PCI_FILL_BASES | PCI_FILL_ROM_BASE)) && d->hdrtype < 0) 83 d->hdrtype = pci_read_byte(d, PCI_HEADER_TYPE); 84 if (flags & PCI_FILL_IDENT) 85 { 86 d->vendor_id = pci_read_word(d, PCI_VENDOR_ID); 87 d->device_id = pci_read_word(d, PCI_DEVICE_ID); 88 } 89 if (flags & PCI_FILL_IRQ) 90 d->irq = pci_read_byte(d, PCI_INTERRUPT_LINE); 91 if (flags & PCI_FILL_BASES) 92 { 93 int cnt = 0, i; 94 bzero(d->base_addr, sizeof(d->base_addr)); 95 switch (d->hdrtype) 96 { 97 case PCI_HEADER_TYPE_NORMAL: 98 cnt = 6; 99 break; 100 case PCI_HEADER_TYPE_BRIDGE: 101 cnt = 2; 102 break; 103 case PCI_HEADER_TYPE_CARDBUS: 104 cnt = 1; 105 break; 106 } 107 if (cnt) 108 { 109 u16 cmd = pci_read_word(d, PCI_COMMAND); 110 for(i=0; i<cnt; i++) 111 { 112 u32 x = pci_read_long(d, PCI_BASE_ADDRESS_0 + i*4); 113 if (!x || x == (u32) ~0) 114 continue; 115 d->base_addr[i] = x; 116 if (x & PCI_BASE_ADDRESS_SPACE_IO) 117 { 118 if (!a->buscentric && !(cmd & PCI_COMMAND_IO)) 119 d->base_addr[i] = 0; 120 } 121 else if (a->buscentric || (cmd & PCI_COMMAND_MEMORY)) 122 { 123 if ((x & PCI_BASE_ADDRESS_MEM_TYPE_MASK) == PCI_BASE_ADDRESS_MEM_TYPE_64) 124 { 125 if (i >= cnt-1) 126 a->warning("%04x:%02x:%02x.%d: Invalid 64-bit address seen.", d->domain, d->bus, d->dev, d->func); 127 else 128 { 129 u32 y = pci_read_long(d, PCI_BASE_ADDRESS_0 + (++i)*4); 130 #ifdef HAVE_64BIT_ADDRESS 131 d->base_addr[i-1] |= ((pciaddr_t) y) << 32; 132 #else 133 if (y) 134 { 135 a->warning("%04x:%02x:%02x.%d 64-bit device address ignored.", d->domain, d->bus, d->dev, d->func); 136 d->base_addr[i-1] = 0; 137 } 138 #endif 139 } 140 } 141 } 142 else 143 d->base_addr[i] = 0; 144 } 145 } 146 } 147 if (flags & PCI_FILL_ROM_BASE) 148 { 149 int reg = 0; 150 d->rom_base_addr = 0; 151 switch (d->hdrtype) 152 { 153 case PCI_HEADER_TYPE_NORMAL: 154 reg = PCI_ROM_ADDRESS; 155 break; 156 case PCI_HEADER_TYPE_BRIDGE: 157 reg = PCI_ROM_ADDRESS1; 158 break; 159 } 160 if (reg) 161 { 162 u32 a = pci_read_long(d, reg); 163 if (a & PCI_ROM_ADDRESS_ENABLE) 164 d->rom_base_addr = a; 165 } 166 } 167 return flags & ~PCI_FILL_SIZES; 168 } 169 170 static int 171 pci_generic_block_op(struct pci_dev *d, int pos, byte *buf, int len, 172 int (*r)(struct pci_dev *d, int pos, byte *buf, int len)) 173 { 174 if ((pos & 1) && len >= 1) 175 { 176 if (!r(d, pos, buf, 1)) 177 return 0; 178 pos++; buf++; len--; 179 } 180 if ((pos & 3) && len >= 2) 181 { 182 if (!r(d, pos, buf, 2)) 183 return 0; 184 pos += 2; buf += 2; len -= 2; 185 } 186 while (len >= 4) 187 { 188 if (!r(d, pos, buf, 4)) 189 return 0; 190 pos += 4; buf += 4; len -= 4; 191 } 192 if (len >= 2) 193 { 194 if (!r(d, pos, buf, 2)) 195 return 0; 196 pos += 2; buf += 2; len -= 2; 197 } 198 if (len && !r(d, pos, buf, 1)) 199 return 0; 200 return 1; 201 } 202 203 int 204 pci_generic_block_read(struct pci_dev *d, int pos, byte *buf, int len) 205 { 206 return pci_generic_block_op(d, pos, buf, len, d->access->methods->read); 207 } 208 209 int 210 pci_generic_block_write(struct pci_dev *d, int pos, byte *buf, int len) 211 { 212 return pci_generic_block_op(d, pos, buf, len, d->access->methods->write); 213 } 214