mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 23:47:24 +00:00
101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2011 The Chromium OS Authors.
|
|
* (C) Copyright 2008,2009
|
|
* Graeme Russ, <graeme.russ@gmail.com>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <log.h>
|
|
#include <malloc.h>
|
|
#include <pci.h>
|
|
#include <asm/io.h>
|
|
#include <asm/pci.h>
|
|
|
|
int pci_x86_read_config(pci_dev_t bdf, uint offset, ulong *valuep,
|
|
enum pci_size_t size)
|
|
{
|
|
outl(bdf | (offset & 0xfc) | PCI_CFG_EN, PCI_REG_ADDR);
|
|
switch (size) {
|
|
case PCI_SIZE_8:
|
|
*valuep = inb(PCI_REG_DATA + (offset & 3));
|
|
break;
|
|
case PCI_SIZE_16:
|
|
*valuep = inw(PCI_REG_DATA + (offset & 2));
|
|
break;
|
|
case PCI_SIZE_32:
|
|
*valuep = inl(PCI_REG_DATA);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pci_x86_write_config(pci_dev_t bdf, uint offset, ulong value,
|
|
enum pci_size_t size)
|
|
{
|
|
outl(bdf | (offset & 0xfc) | PCI_CFG_EN, PCI_REG_ADDR);
|
|
switch (size) {
|
|
case PCI_SIZE_8:
|
|
outb(value, PCI_REG_DATA + (offset & 3));
|
|
break;
|
|
case PCI_SIZE_16:
|
|
outw(value, PCI_REG_DATA + (offset & 2));
|
|
break;
|
|
case PCI_SIZE_32:
|
|
outl(value, PCI_REG_DATA);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pci_x86_clrset_config(pci_dev_t bdf, uint offset, ulong clr, ulong set,
|
|
enum pci_size_t size)
|
|
{
|
|
ulong value;
|
|
int ret;
|
|
|
|
ret = pci_x86_read_config(bdf, offset, &value, size);
|
|
if (ret)
|
|
return ret;
|
|
value &= ~clr;
|
|
value |= set;
|
|
|
|
return pci_x86_write_config(bdf, offset, value, size);
|
|
}
|
|
|
|
void pci_assign_irqs(int bus, int device, u8 irq[4])
|
|
{
|
|
pci_dev_t bdf;
|
|
int func;
|
|
u16 vendor;
|
|
u8 pin, line;
|
|
|
|
for (func = 0; func < 8; func++) {
|
|
bdf = PCI_BDF(bus, device, func);
|
|
pci_read_config16(bdf, PCI_VENDOR_ID, &vendor);
|
|
if (vendor == 0xffff || vendor == 0x0000)
|
|
continue;
|
|
|
|
pci_read_config8(bdf, PCI_INTERRUPT_PIN, &pin);
|
|
|
|
/* PCI spec says all values except 1..4 are reserved */
|
|
if ((pin < 1) || (pin > 4))
|
|
continue;
|
|
|
|
line = irq[pin - 1];
|
|
if (!line)
|
|
continue;
|
|
|
|
debug("Assigning IRQ %d to PCI device %d.%x.%d (INT%c)\n",
|
|
line, bus, device, func, 'A' + pin - 1);
|
|
|
|
pci_write_config8(bdf, PCI_INTERRUPT_LINE, line);
|
|
}
|
|
}
|