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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4300 | trochtova | 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 | * May 8, 2006 - 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 pci_generic_scan_bus(struct pci_access *a, byte * busmap, int bus) |
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| 16 | { |
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| 17 | int dev, multi, ht; |
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| 18 | struct pci_dev *t; |
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| 19 | |||
| 20 | a->debug("Scanning bus %02x for devices...\n", bus); |
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| 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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| 36 | |||
| 37 | if (!vd || vd == 0xffffffff) |
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| 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 | |||
| 53 | switch (ht) { |
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| 54 | case PCI_HEADER_TYPE_NORMAL: |
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| 55 | break; |
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| 56 | case PCI_HEADER_TYPE_BRIDGE: |
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| 57 | case PCI_HEADER_TYPE_CARDBUS: |
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| 58 | pci_generic_scan_bus(a, busmap, |
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| 59 | pci_read_byte(t, |
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| 60 | PCI_SECONDARY_BUS)); |
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| 61 | break; |
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| 62 | default: |
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| 63 | a->debug |
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| 64 | ("Device %04x:%02x:%02x.%d has unknown header type %02x.\n", |
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| 65 | d->domain, d->bus, d->dev, d->func, |
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| 66 | ht); |
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| 67 | } |
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| 68 | } |
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| 69 | } |
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| 70 | pci_free_dev(t); |
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| 71 | } |
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| 72 | |||
| 73 | void pci_generic_scan(struct pci_access *a) |
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| 74 | { |
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| 75 | byte busmap[256]; |
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| 76 | |||
| 77 | bzero(busmap, sizeof(busmap)); |
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| 78 | pci_generic_scan_bus(a, busmap, 0); |
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| 79 | } |
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| 80 | |||
| 81 | int pci_generic_fill_info(struct pci_dev *d, int flags) |
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| 82 | { |
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| 83 | struct pci_access *a = d->access; |
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| 84 | |||
| 85 | if ((flags & (PCI_FILL_BASES | PCI_FILL_ROM_BASE)) |
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| 86 | && d->hdrtype < 0) |
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| 87 | d->hdrtype = pci_read_byte(d, PCI_HEADER_TYPE) & 0x7f; |
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| 88 | if (flags & PCI_FILL_IDENT) { |
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| 89 | d->vendor_id = pci_read_word(d, PCI_VENDOR_ID); |
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| 90 | d->device_id = pci_read_word(d, PCI_DEVICE_ID); |
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| 91 | } |
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| 92 | if (flags & PCI_FILL_IRQ) |
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| 93 | d->irq = pci_read_byte(d, PCI_INTERRUPT_LINE); |
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| 94 | if (flags & PCI_FILL_BASES) { |
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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 | case PCI_HEADER_TYPE_NORMAL: |
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| 99 | cnt = 6; |
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| 100 | break; |
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| 101 | case PCI_HEADER_TYPE_BRIDGE: |
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| 102 | cnt = 2; |
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| 103 | break; |
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| 104 | case PCI_HEADER_TYPE_CARDBUS: |
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| 105 | cnt = 1; |
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| 106 | break; |
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| 107 | } |
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| 108 | if (cnt) { |
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| 109 | for (i = 0; i < cnt; i++) { |
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| 110 | u32 x = pci_read_long(d, PCI_BASE_ADDRESS_0 + i * 4); |
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| 111 | if (!x || x == (u32) ~ 0) |
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| 112 | continue; |
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| 113 | if ((x & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) |
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| 114 | d->base_addr[i] = x; |
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| 115 | else { |
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| 116 | if ((x & PCI_BASE_ADDRESS_MEM_TYPE_MASK) != PCI_BASE_ADDRESS_MEM_TYPE_64) |
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| 117 | d->base_addr[i] = x; |
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| 118 | else if (i >= cnt - 1) |
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| 119 | a->warning("%04x:%02x:%02x.%d: Invalid 64-bit address seen for BAR %d.", |
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| 120 | d->domain, d->bus, |
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| 121 | d->dev, d->func, i); |
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| 122 | else { |
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| 123 | u32 y = pci_read_long(d, PCI_BASE_ADDRESS_0 + (++i) * 4); |
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| 124 | #ifdef PCI_HAVE_64BIT_ADDRESS |
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| 125 | d->base_addr[i - 1] = x | (((pciaddr_t) y) << 32); |
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| 126 | #else |
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| 127 | if (y) |
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| 128 | a->warning("%04x:%02x:%02x.%d 64-bit device address ignored.", |
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| 129 | d->domain, |
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| 130 | d->bus, |
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| 131 | d->dev, |
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| 132 | d->func); |
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| 133 | else |
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| 134 | d->base_addr[i - 1] = x; |
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| 135 | #endif |
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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 | } |
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| 141 | if (flags & PCI_FILL_ROM_BASE) { |
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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 | case PCI_HEADER_TYPE_NORMAL: |
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| 146 | reg = PCI_ROM_ADDRESS; |
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| 147 | break; |
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| 148 | case PCI_HEADER_TYPE_BRIDGE: |
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| 149 | reg = PCI_ROM_ADDRESS1; |
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| 150 | break; |
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| 151 | } |
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| 152 | if (reg) { |
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| 153 | u32 u = pci_read_long(d, reg); |
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| 154 | if (u != 0xffffffff) |
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| 155 | d->rom_base_addr = u; |
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| 156 | } |
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| 157 | } |
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| 158 | return flags & ~PCI_FILL_SIZES; |
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| 159 | } |
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| 160 | |||
| 161 | static int |
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| 162 | pci_generic_block_op(struct pci_dev *d, int pos, byte * buf, int len, |
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| 163 | int (*r) (struct pci_dev * d, int pos, byte * buf, |
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| 164 | int len)) |
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| 165 | { |
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| 166 | if ((pos & 1) && len >= 1) { |
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| 167 | if (!r(d, pos, buf, 1)) |
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| 168 | return 0; |
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| 169 | pos++; |
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| 170 | buf++; |
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| 171 | len--; |
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| 172 | } |
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| 173 | if ((pos & 3) && len >= 2) { |
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| 174 | if (!r(d, pos, buf, 2)) |
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| 175 | return 0; |
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| 176 | pos += 2; |
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| 177 | buf += 2; |
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| 178 | len -= 2; |
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| 179 | } |
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| 180 | while (len >= 4) { |
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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; |
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| 184 | buf += 4; |
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| 185 | len -= 4; |
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| 186 | } |
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| 187 | if (len >= 2) { |
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| 188 | if (!r(d, pos, buf, 2)) |
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| 189 | return 0; |
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| 190 | pos += 2; |
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| 191 | buf += 2; |
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| 192 | len -= 2; |
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| 193 | } |
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| 194 | if (len && !r(d, pos, buf, 1)) |
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| 195 | return 0; |
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| 196 | return 1; |
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| 197 | } |
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| 198 | |||
| 199 | int pci_generic_block_read(struct pci_dev *d, int pos, byte * buf, int len) |
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| 200 | { |
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| 201 | return pci_generic_block_op(d, pos, buf, len, d->access->methods->read); |
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| 202 | } |
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| 203 | |||
| 204 | int pci_generic_block_write(struct pci_dev *d, int pos, byte * buf, int len) |
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| 205 | { |
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| 206 | return pci_generic_block_op(d, pos, buf, len, d->access->methods->write); |
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| 207 | } |