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/*
* (C) Copyright 2008
* Graeme Russ, graeme.russ@gmail.com.
*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB <daniel@omicron.se>.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <pci.h>
#include <asm/pci.h>
#include <asm/ic/pci.h>
static void pci_enet_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
{
/* a configurable lists of IRQs to steal when we need one */
static int irq_list[] = {
CONFIG_SYS_FIRST_PCI_IRQ,
CONFIG_SYS_SECOND_PCI_IRQ,
CONFIG_SYS_THIRD_PCI_IRQ,
CONFIG_SYS_FORTH_PCI_IRQ
};
static int next_irq_index=0;
uchar tmp_pin;
int pin;
pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &tmp_pin);
pin = tmp_pin;
pin -= 1; /* PCI config space use 1-based numbering */
if (pin == -1) {
return; /* device use no irq */
}
/* map device number + pin to a pin on the sc520 */
switch (PCI_DEV(dev)) {
case 12: /* First Ethernet Chip */
pin += SC520_PCI_INTA;
break;
case 13: /* Second Ethernet Chip */
pin += SC520_PCI_INTB;
break;
default:
return;
}
pin &= 3; /* wrap around */
if (sc520_pci_ints[pin] == -1) {
/* re-route one interrupt for us */
if (next_irq_index > 3) {
return;
}
if (pci_sc520_set_irq(pin, irq_list[next_irq_index])) {
return;
}
next_irq_index++;
}
if (-1 != sc520_pci_ints[pin]) {
pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
sc520_pci_ints[pin]);
}
printf("fixup_irq: device %d pin %c irq %d\n",
PCI_DEV(dev), 'A' + pin, sc520_pci_ints[pin]);
}
static struct pci_controller enet_hose = {
fixup_irq: pci_enet_fixup_irq,
};
void pci_init_board(void)
{
pci_sc520_init(&enet_hose);
}
int pci_set_regions(struct pci_controller *hose)
{
/* System memory space */
pci_set_region(hose->regions + 0,
SC520_PCI_MEMORY_BUS,
SC520_PCI_MEMORY_PHYS,
SC520_PCI_MEMORY_SIZE,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
/* ISA/PCI memory space */
pci_set_region(hose->regions + 1,
SC520_ISA_MEM_BUS,
SC520_ISA_MEM_PHYS,
SC520_ISA_MEM_SIZE,
PCI_REGION_MEM);
/* PCI I/O space */
pci_set_region(hose->regions + 2,
SC520_PCI_IO_BUS,
SC520_PCI_IO_PHYS,
SC520_PCI_IO_SIZE,
PCI_REGION_IO);
/* ISA/PCI I/O space */
pci_set_region(hose->regions + 3,
SC520_ISA_IO_BUS,
SC520_ISA_IO_PHYS,
SC520_ISA_IO_SIZE,
PCI_REGION_IO);
return 4;
}
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