/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2000, 2001 Keith M Wesolowski
* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/types.h>
#include <asm/ip32/mace.h>
#include <asm/ip32/ip32_ints.h>
#undef DEBUG_MACE_PCI
/*
* Handle errors from the bridge. This includes master and target aborts,
* various command and address errors, and the interrupt test. This gets
* registered on the bridge error irq. It's conceivable that some of these
* conditions warrant a panic. Anybody care to say which ones?
*/
static irqreturn_t macepci_error(int irq, void *dev)
{
char s;
unsigned int flags = mace->pci.error;
unsigned int addr = mace->pci.error_addr;
if (flags & MACEPCI_ERROR_MEMORY_ADDR)
s = 'M';
else if (flags & MACEPCI_ERROR_CONFIG_ADDR)
s = 'C';
else
s = 'X';
if (flags & MACEPCI_ERROR_MASTER_ABORT) {
printk("MACEPCI: Master abort at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_MASTER_ABORT;
}
if (flags & MACEPCI_ERROR_TARGET_ABORT) {
printk("MACEPCI: Target abort at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_TARGET_ABORT;
}
if (flags & MACEPCI_ERROR_DATA_PARITY_ERR) {
printk("MACEPCI: Data parity error at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_DATA_PARITY_ERR;
}
if (flags & MACEPCI_ERROR_RETRY_ERR) {
printk("MACEPCI: Retry error at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_RETRY_ERR;
}
if (flags & MACEPCI_ERROR_ILLEGAL_CMD) {
printk("MACEPCI: Illegal command at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_ILLEGAL_CMD;
}
if (flags & MACEPCI_ERROR_SYSTEM_ERR) {
printk("MACEPCI: System error at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_SYSTEM_ERR;
}
if (flags & MACEPCI_ERROR_PARITY_ERR) {
printk("MACEPCI: Parity error at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_PARITY_ERR;
}
if (flags & MACEPCI_ERROR_OVERRUN) {
printk("MACEPCI: Overrun error at 0x%08x (%c)\n", addr, s);
flags &= ~MACEPCI_ERROR_OVERRUN;
}
if (flags & MACEPCI_ERROR_SIG_TABORT) {
printk("MACEPCI: Signaled target abort (clearing)\n");
flags &= ~MACEPCI_ERROR_SIG_TABORT;
}
if (flags & MACEPCI_ERROR_INTERRUPT_TEST) {
printk("MACEPCI: Interrupt test triggered (clearing)\n");
flags &= ~MACEPCI_ERROR_INTERRUPT_TEST;
}
mace->pci.error = flags;
return IRQ_HANDLED;
}
extern struct pci_ops mace_pci_ops;
#ifdef CONFIG_64BIT
static struct resource mace_pci_mem_resource = {
.name = "SGI O2 PCI MEM",
.start = MACEPCI_HI_MEMORY,
.end = 0x2FFFFFFFFUL,
.flags = IORESOURCE_MEM,
};
static struct resource mace_pci_io_resource = {
.name = "SGI O2 PCI IO",
.start = 0x00000000UL,
.end = 0xffffffffUL,
.flags = IORESOURCE_IO,
};
#define MACE_PCI_MEM_OFFSET 0x200000000
#else
static struct resource mace_pci_mem_resource = {
.name = "SGI O2 PCI MEM",
.start = MACEPCI_LOW_MEMORY,
.end = MACEPCI_LOW_MEMORY + 0x2000000 - 1,
.flags = IORESOURCE_MEM,
};
static struct resource mace_pci_io_resource = {
.name = "SGI O2 PCI IO",
.start = 0x00000000,
.end = 0xFFFFFFFF,
.flags = IORESOURCE_IO,
};
#define MACE_PCI_MEM_OFFSET (MACEPCI_LOW_MEMORY - 0x80000000)
#endif
static struct pci_controller mace_pci_controller = {
.pci_ops = &mace_pci_ops,
.mem_resource = &mace_pci_mem_resource,
.io_resource = &mace_pci_io_resource,
.iommu = 0,
.mem_offset = MACE_PCI_MEM_OFFSET,
.io_offset = 0,
};
static int __init mace_init(void)
{
PCIBIOS_MIN_IO = 0x1000;
/* Clear any outstanding errors and enable interrupts */
mace->pci.error_addr = 0;
mace->pci.error = 0;
mace->pci.control = 0xff008500;
printk("MACE PCI rev %d\n", mace->pci.rev);
BUG_ON(request_irq(MACE_PCI_BRIDGE_IRQ, macepci_error, 0,
"MACE PCI error", NULL));
iomem_resource = mace_pci_mem_resource;
ioport_resource = mace_pci_io_resource;
register_pci_controller(&mace_pci_controller);
return 0;
}
arch_initcall(mace_init);
