0,0 → 1,206 |
/* |
* The PCI Library -- Generic Direct Access Functions |
* |
* Copyright (c) 1997--2000 Martin Mares <mj@ucw.cz> |
* |
* Modified and ported to HelenOS by Jakub Jermar. |
* |
* Can be freely distributed and used under the terms of the GNU GPL. |
*/ |
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#include <string.h> |
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#include "internal.h" |
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void |
pci_generic_scan_bus(struct pci_access *a, byte *busmap, int bus) |
{ |
int dev, multi, ht; |
struct pci_dev *t; |
|
a->debug("Scanning bus %02x for devices...\n", bus); |
if (busmap[bus]) |
{ |
a->warning("Bus %02x seen twice (firmware bug). Ignored.", bus); |
return; |
} |
busmap[bus] = 1; |
t = pci_alloc_dev(a); |
t->bus = bus; |
for(dev=0; dev<32; dev++) |
{ |
t->dev = dev; |
multi = 0; |
for(t->func=0; !t->func || multi && t->func<8; t->func++) |
{ |
u32 vd = pci_read_long(t, PCI_VENDOR_ID); |
struct pci_dev *d; |
|
if (!vd || vd == 0xffffffff) |
continue; |
ht = pci_read_byte(t, PCI_HEADER_TYPE); |
if (!t->func) |
multi = ht & 0x80; |
ht &= 0x7f; |
d = pci_alloc_dev(a); |
d->bus = t->bus; |
d->dev = t->dev; |
d->func = t->func; |
d->vendor_id = vd & 0xffff; |
d->device_id = vd >> 16U; |
d->known_fields = PCI_FILL_IDENT; |
d->hdrtype = ht; |
pci_link_dev(a, d); |
switch (ht) |
{ |
case PCI_HEADER_TYPE_NORMAL: |
break; |
case PCI_HEADER_TYPE_BRIDGE: |
case PCI_HEADER_TYPE_CARDBUS: |
pci_generic_scan_bus(a, busmap, pci_read_byte(t, PCI_SECONDARY_BUS)); |
break; |
default: |
a->debug("Device %04x:%02x:%02x.%d has unknown header type %02x.\n", d->domain, d->bus, d->dev, d->func, ht); |
} |
} |
} |
pci_free_dev(t); |
} |
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void |
pci_generic_scan(struct pci_access *a) |
{ |
byte busmap[256]; |
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bzero(busmap, sizeof(busmap)); |
pci_generic_scan_bus(a, busmap, 0); |
} |
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int |
pci_generic_fill_info(struct pci_dev *d, int flags) |
{ |
struct pci_access *a = d->access; |
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if ((flags & (PCI_FILL_BASES | PCI_FILL_ROM_BASE)) && d->hdrtype < 0) |
d->hdrtype = pci_read_byte(d, PCI_HEADER_TYPE) & 0x7f; |
if (flags & PCI_FILL_IDENT) |
{ |
d->vendor_id = pci_read_word(d, PCI_VENDOR_ID); |
d->device_id = pci_read_word(d, PCI_DEVICE_ID); |
} |
if (flags & PCI_FILL_IRQ) |
d->irq = pci_read_byte(d, PCI_INTERRUPT_LINE); |
if (flags & PCI_FILL_BASES) |
{ |
int cnt = 0, i; |
bzero(d->base_addr, sizeof(d->base_addr)); |
switch (d->hdrtype) |
{ |
case PCI_HEADER_TYPE_NORMAL: |
cnt = 6; |
break; |
case PCI_HEADER_TYPE_BRIDGE: |
cnt = 2; |
break; |
case PCI_HEADER_TYPE_CARDBUS: |
cnt = 1; |
break; |
} |
if (cnt) |
{ |
for(i=0; i<cnt; i++) |
{ |
u32 x = pci_read_long(d, PCI_BASE_ADDRESS_0 + i*4); |
if (!x || x == (u32) ~0) |
continue; |
if ((x & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) |
d->base_addr[i] = x; |
else |
{ |
if ((x & PCI_BASE_ADDRESS_MEM_TYPE_MASK) != PCI_BASE_ADDRESS_MEM_TYPE_64) |
d->base_addr[i] = x; |
else if (i >= cnt-1) |
a->warning("%04x:%02x:%02x.%d: Invalid 64-bit address seen for BAR %d.", d->domain, d->bus, d->dev, d->func, i); |
else |
{ |
u32 y = pci_read_long(d, PCI_BASE_ADDRESS_0 + (++i)*4); |
#ifdef PCI_HAVE_64BIT_ADDRESS |
d->base_addr[i-1] = x | (((pciaddr_t) y) << 32); |
#else |
if (y) |
a->warning("%04x:%02x:%02x.%d 64-bit device address ignored.", d->domain, d->bus, d->dev, d->func); |
else |
d->base_addr[i-1] = x; |
#endif |
} |
} |
} |
} |
} |
if (flags & PCI_FILL_ROM_BASE) |
{ |
int reg = 0; |
d->rom_base_addr = 0; |
switch (d->hdrtype) |
{ |
case PCI_HEADER_TYPE_NORMAL: |
reg = PCI_ROM_ADDRESS; |
break; |
case PCI_HEADER_TYPE_BRIDGE: |
reg = PCI_ROM_ADDRESS1; |
break; |
} |
if (reg) |
{ |
u32 u = pci_read_long(d, reg); |
if (u != 0xffffffff) |
d->rom_base_addr = u; |
} |
} |
return flags & ~PCI_FILL_SIZES; |
} |
|
static int |
pci_generic_block_op(struct pci_dev *d, int pos, byte *buf, int len, |
int (*r)(struct pci_dev *d, int pos, byte *buf, int len)) |
{ |
if ((pos & 1) && len >= 1) |
{ |
if (!r(d, pos, buf, 1)) |
return 0; |
pos++; buf++; len--; |
} |
if ((pos & 3) && len >= 2) |
{ |
if (!r(d, pos, buf, 2)) |
return 0; |
pos += 2; buf += 2; len -= 2; |
} |
while (len >= 4) |
{ |
if (!r(d, pos, buf, 4)) |
return 0; |
pos += 4; buf += 4; len -= 4; |
} |
if (len >= 2) |
{ |
if (!r(d, pos, buf, 2)) |
return 0; |
pos += 2; buf += 2; len -= 2; |
} |
if (len && !r(d, pos, buf, 1)) |
return 0; |
return 1; |
} |
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int |
pci_generic_block_read(struct pci_dev *d, int pos, byte *buf, int len) |
{ |
return pci_generic_block_op(d, pos, buf, len, d->access->methods->read); |
} |
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int |
pci_generic_block_write(struct pci_dev *d, int pos, byte *buf, int len) |
{ |
return pci_generic_block_op(d, pos, buf, len, d->access->methods->write); |
} |