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