/*
* PCI code for DDB5477.
*
* Copyright (C) 2001 MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <asm/bootinfo.h>
#include <asm/debug.h>
#include <asm/ddb5xxx/ddb5xxx.h>
static struct resource extpci_io_resource = {
"ext pci IO space",
DDB_PCI0_IO_BASE - DDB_PCI_IO_BASE + 0x4000,
DDB_PCI0_IO_BASE - DDB_PCI_IO_BASE + DDB_PCI0_IO_SIZE - 1,
IORESOURCE_IO
};
static struct resource extpci_mem_resource = {
"ext pci memory space",
DDB_PCI0_MEM_BASE + 0x100000,
DDB_PCI0_MEM_BASE + DDB_PCI0_MEM_SIZE - 1,
IORESOURCE_MEM
};
static struct resource iopci_io_resource = {
"io pci IO space",
DDB_PCI1_IO_BASE - DDB_PCI_IO_BASE,
DDB_PCI1_IO_BASE - DDB_PCI_IO_BASE + DDB_PCI1_IO_SIZE - 1,
IORESOURCE_IO
};
static struct resource iopci_mem_resource = {
"ext pci memory space",
DDB_PCI1_MEM_BASE,
DDB_PCI1_MEM_BASE + DDB_PCI1_MEM_SIZE - 1,
IORESOURCE_MEM
};
extern struct pci_ops ddb5477_ext_pci_ops;
extern struct pci_ops ddb5477_io_pci_ops;
struct pci_controller ddb5477_ext_controller = {
.pci_ops = &ddb5477_ext_pci_ops,
.io_resource = &extpci_io_resource,
.mem_resource = &extpci_mem_resource
};
struct pci_controller ddb5477_io_controller = {
.pci_ops = &ddb5477_io_pci_ops,
.io_resource = &iopci_io_resource,
.mem_resource = &iopci_mem_resource
};
/*
* we fix up irqs based on the slot number.
* The first entry is at AD:11.
* Fortunately this works because, although we have two pci buses,
* they all have different slot numbers (except for rockhopper slot 20
* which is handled below).
*
*/
/*
* irq mapping : device -> pci int # -> vrc4377 irq# ,
* ddb5477 board manual page 4 and vrc5477 manual page 46
*/
/*
* based on ddb5477 manual page 11
*/
#define MAX_SLOT_NUM 21
static unsigned char irq_map[MAX_SLOT_NUM] = {
/* SLOT: 0, AD:11 */ 0xff,
/* SLOT: 1, AD:12 */ 0xff,
/* SLOT: 2, AD:13 */ 0xff,
/* SLOT: 3, AD:14 */ 0xff,
/* SLOT: 4, AD:15 */ VRC5477_IRQ_INTA, /* onboard tulip */
/* SLOT: 5, AD:16 */ VRC5477_IRQ_INTB, /* slot 1 */
/* SLOT: 6, AD:17 */ VRC5477_IRQ_INTC, /* slot 2 */
/* SLOT: 7, AD:18 */ VRC5477_IRQ_INTD, /* slot 3 */
/* SLOT: 8, AD:19 */ VRC5477_IRQ_INTE, /* slot 4 */
/* SLOT: 9, AD:20 */ 0xff,
/* SLOT: 10, AD:21 */ 0xff,
/* SLOT: 11, AD:22 */ 0xff,
/* SLOT: 12, AD:23 */ 0xff,
/* SLOT: 13, AD:24 */ 0xff,
/* SLOT: 14, AD:25 */ 0xff,
/* SLOT: 15, AD:26 */ 0xff,
/* SLOT: 16, AD:27 */ 0xff,
/* SLOT: 17, AD:28 */ 0xff,
/* SLOT: 18, AD:29 */ VRC5477_IRQ_IOPCI_INTC, /* vrc5477 ac97 */
/* SLOT: 19, AD:30 */ VRC5477_IRQ_IOPCI_INTB, /* vrc5477 usb peri */
/* SLOT: 20, AD:31 */ VRC5477_IRQ_IOPCI_INTA, /* vrc5477 usb host */
};
static unsigned char rockhopperII_irq_map[MAX_SLOT_NUM] = {
/* SLOT: 0, AD:11 */ 0xff,
/* SLOT: 1, AD:12 */ VRC5477_IRQ_INTB, /* onboard AMD PCNET */
/* SLOT: 2, AD:13 */ 0xff,
/* SLOT: 3, AD:14 */ 0xff,
/* SLOT: 4, AD:15 */ 14, /* M5229 ide ISA irq */
/* SLOT: 5, AD:16 */ VRC5477_IRQ_INTD, /* slot 3 */
/* SLOT: 6, AD:17 */ VRC5477_IRQ_INTA, /* slot 4 */
/* SLOT: 7, AD:18 */ VRC5477_IRQ_INTD, /* slot 5 */
/* SLOT: 8, AD:19 */ 0, /* M5457 modem nop */
/* SLOT: 9, AD:20 */ VRC5477_IRQ_INTA, /* slot 2 */
/* SLOT: 10, AD:21 */ 0xff,
/* SLOT: 11, AD:22 */ 0xff,
/* SLOT: 12, AD:23 */ 0xff,
/* SLOT: 13, AD:24 */ 0xff,
/* SLOT: 14, AD:25 */ 0xff,
/* SLOT: 15, AD:26 */ 0xff,
/* SLOT: 16, AD:27 */ 0xff,
/* SLOT: 17, AD:28 */ 0, /* M7101 PMU nop */
/* SLOT: 18, AD:29 */ VRC5477_IRQ_IOPCI_INTC, /* vrc5477 ac97 */
/* SLOT: 19, AD:30 */ VRC5477_IRQ_IOPCI_INTB, /* vrc5477 usb peri */
/* SLOT: 20, AD:31 */ VRC5477_IRQ_IOPCI_INTA, /* vrc5477 usb host */
};
int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
int slot_num;
unsigned char *slot_irq_map;
unsigned char irq;
/*
* We ignore the swizzled slot and pin values. The original
* pci_fixup_irq() codes largely base irq number on the dev slot
* numbers because except for one case they are unique even
* though there are multiple pci buses.
*/
if (mips_machtype == MACH_NEC_ROCKHOPPERII)
slot_irq_map = rockhopperII_irq_map;
else
slot_irq_map = irq_map;
slot_num = PCI_SLOT(dev->devfn);
irq = slot_irq_map[slot_num];
db_assert(slot_num < MAX_SLOT_NUM);
db_assert(irq != 0xff);
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
if (mips_machtype == MACH_NEC_ROCKHOPPERII) {
/* hack to distinquish overlapping slot 20s, one
* on bus 0 (ALI USB on the M1535 on the backplane),
* and one on bus 2 (NEC USB controller on the CPU board)
* Make the M1535 USB - ISA IRQ number 9.
*/
if (slot_num == 20 && dev->bus->number == 0) {
pci_write_config_byte(dev,
PCI_INTERRUPT_LINE,
9);
irq = 9;
}
}
return irq;
}
/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}
void ddb_pci_reset_bus(void)
{
u32 temp;
/*
* I am not sure about the "official" procedure, the following
* steps work as far as I know:
* We first set PCI cold reset bit (bit 31) in PCICTRL-H.
* Then we clear the PCI warm reset bit (bit 30) to 0 in PCICTRL-H.
* The same is true for both PCI channels.
*/
temp = ddb_in32(DDB_PCICTL0_H);
temp |= 0x80000000;
ddb_out32(DDB_PCICTL0_H, temp);
temp &= ~0xc0000000;
ddb_out32(DDB_PCICTL0_H, temp);
temp = ddb_in32(DDB_PCICTL1_H);
temp |= 0x80000000;
ddb_out32(DDB_PCICTL1_H, temp);
temp &= ~0xc0000000;
ddb_out32(DDB_PCICTL1_H, temp);
}
