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/*
* 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>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <pci.h>
#include <asm/io.h>
#include <asm/pci.h>
DECLARE_GLOBAL_DATA_PTR;
static struct pci_controller *get_hose(void)
{
if (gd->hose)
return gd->hose;
return pci_bus_to_hose(0);
}
unsigned int x86_pci_read_config8(pci_dev_t dev, unsigned where)
{
uint8_t value;
if (pci_hose_read_config_byte(get_hose(), dev, where, &value))
return -1U;
return value;
}
unsigned int x86_pci_read_config16(pci_dev_t dev, unsigned where)
{
uint16_t value;
if (pci_hose_read_config_word(get_hose(), dev, where, &value))
return -1U;
return value;
}
unsigned int x86_pci_read_config32(pci_dev_t dev, unsigned where)
{
uint32_t value;
if (pci_hose_read_config_dword(get_hose(), dev, where, &value))
return -1U;
return value;
}
void x86_pci_write_config8(pci_dev_t dev, unsigned where, unsigned value)
{
pci_hose_write_config_byte(get_hose(), dev, where, value);
}
void x86_pci_write_config16(pci_dev_t dev, unsigned where, unsigned value)
{
pci_hose_write_config_word(get_hose(), dev, where, value);
}
void x86_pci_write_config32(pci_dev_t dev, unsigned where, unsigned value)
{
pci_hose_write_config_dword(get_hose(), dev, where, value);
}
int pci_x86_read_config(struct udevice *bus, 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(struct udevice *bus, 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;
}
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);
vendor = x86_pci_read_config16(bdf, PCI_VENDOR_ID);
if (vendor == 0xffff || vendor == 0x0000)
continue;
pin = x86_pci_read_config8(bdf, PCI_INTERRUPT_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);
x86_pci_write_config8(bdf, PCI_INTERRUPT_LINE, line);
}
}
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