ae71c426ba
Patch from Thomas Gleixner From: Thomas Gleixner <tglx@linutronix.de> Fixup the conversion to generic irq subsystem. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
344 lines
8.4 KiB
C
344 lines
8.4 KiB
C
/*
|
|
* arch/arm/mach-ixp23xx/ixdp2351.c
|
|
*
|
|
* IXDP2351 board-specific routines
|
|
*
|
|
* Author: Deepak Saxena <dsaxena@plexity.net>
|
|
*
|
|
* Copyright 2005 (c) MontaVista Software, Inc.
|
|
*
|
|
* Based on 2.4 code Copyright 2004 (c) Intel Corporation
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/serial_8250.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/device.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/mtd/physmap.h>
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/memory.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/system.h>
|
|
#include <asm/tlbflush.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/mach/pci.h>
|
|
|
|
/*
|
|
* IXDP2351 Interrupt Handling
|
|
*/
|
|
static void ixdp2351_inta_mask(unsigned int irq)
|
|
{
|
|
*IXDP2351_CPLD_INTA_MASK_SET_REG = IXDP2351_INTA_IRQ_MASK(irq);
|
|
}
|
|
|
|
static void ixdp2351_inta_unmask(unsigned int irq)
|
|
{
|
|
*IXDP2351_CPLD_INTA_MASK_CLR_REG = IXDP2351_INTA_IRQ_MASK(irq);
|
|
}
|
|
|
|
static void ixdp2351_inta_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
|
|
{
|
|
u16 ex_interrupt =
|
|
*IXDP2351_CPLD_INTA_STAT_REG & IXDP2351_INTA_IRQ_VALID;
|
|
int i;
|
|
|
|
desc->chip->mask(irq);
|
|
|
|
for (i = 0; i < IXDP2351_INTA_IRQ_NUM; i++) {
|
|
if (ex_interrupt & (1 << i)) {
|
|
struct irqdesc *cpld_desc;
|
|
int cpld_irq =
|
|
IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + i);
|
|
cpld_desc = irq_desc + cpld_irq;
|
|
desc_handle_irq(cpld_irq, cpld_desc, regs);
|
|
}
|
|
}
|
|
|
|
desc->chip->unmask(irq);
|
|
}
|
|
|
|
static struct irqchip ixdp2351_inta_chip = {
|
|
.ack = ixdp2351_inta_mask,
|
|
.mask = ixdp2351_inta_mask,
|
|
.unmask = ixdp2351_inta_unmask
|
|
};
|
|
|
|
static void ixdp2351_intb_mask(unsigned int irq)
|
|
{
|
|
*IXDP2351_CPLD_INTB_MASK_SET_REG = IXDP2351_INTB_IRQ_MASK(irq);
|
|
}
|
|
|
|
static void ixdp2351_intb_unmask(unsigned int irq)
|
|
{
|
|
*IXDP2351_CPLD_INTB_MASK_CLR_REG = IXDP2351_INTB_IRQ_MASK(irq);
|
|
}
|
|
|
|
static void ixdp2351_intb_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
|
|
{
|
|
u16 ex_interrupt =
|
|
*IXDP2351_CPLD_INTB_STAT_REG & IXDP2351_INTB_IRQ_VALID;
|
|
int i;
|
|
|
|
desc->chip->ack(irq);
|
|
|
|
for (i = 0; i < IXDP2351_INTB_IRQ_NUM; i++) {
|
|
if (ex_interrupt & (1 << i)) {
|
|
struct irqdesc *cpld_desc;
|
|
int cpld_irq =
|
|
IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + i);
|
|
cpld_desc = irq_desc + cpld_irq;
|
|
desc_handle_irq(cpld_irq, cpld_desc, regs);
|
|
}
|
|
}
|
|
|
|
desc->chip->unmask(irq);
|
|
}
|
|
|
|
static struct irqchip ixdp2351_intb_chip = {
|
|
.ack = ixdp2351_intb_mask,
|
|
.mask = ixdp2351_intb_mask,
|
|
.unmask = ixdp2351_intb_unmask
|
|
};
|
|
|
|
void ixdp2351_init_irq(void)
|
|
{
|
|
int irq;
|
|
|
|
/* Mask all interrupts from CPLD, disable simulation */
|
|
*IXDP2351_CPLD_INTA_MASK_SET_REG = (u16) -1;
|
|
*IXDP2351_CPLD_INTB_MASK_SET_REG = (u16) -1;
|
|
*IXDP2351_CPLD_INTA_SIM_REG = 0;
|
|
*IXDP2351_CPLD_INTB_SIM_REG = 0;
|
|
|
|
ixp23xx_init_irq();
|
|
|
|
for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE);
|
|
irq <
|
|
IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + IXDP2351_INTA_IRQ_NUM);
|
|
irq++) {
|
|
if (IXDP2351_INTA_IRQ_MASK(irq) & IXDP2351_INTA_IRQ_VALID) {
|
|
set_irq_flags(irq, IRQF_VALID);
|
|
set_irq_handler(irq, do_level_IRQ);
|
|
set_irq_chip(irq, &ixdp2351_inta_chip);
|
|
}
|
|
}
|
|
|
|
for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE);
|
|
irq <
|
|
IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + IXDP2351_INTB_IRQ_NUM);
|
|
irq++) {
|
|
if (IXDP2351_INTB_IRQ_MASK(irq) & IXDP2351_INTB_IRQ_VALID) {
|
|
set_irq_flags(irq, IRQF_VALID);
|
|
set_irq_handler(irq, do_level_IRQ);
|
|
set_irq_chip(irq, &ixdp2351_intb_chip);
|
|
}
|
|
}
|
|
|
|
set_irq_chained_handler(IRQ_IXP23XX_INTA, ixdp2351_inta_handler);
|
|
set_irq_chained_handler(IRQ_IXP23XX_INTB, ixdp2351_intb_handler);
|
|
}
|
|
|
|
/*
|
|
* IXDP2351 PCI
|
|
*/
|
|
|
|
/*
|
|
* This board does not do normal PCI IRQ routing, or any
|
|
* sort of swizzling, so we just need to check where on the
|
|
* bus the device is and figure out what CPLD pin it is
|
|
* being routed to.
|
|
*/
|
|
#define DEVPIN(dev, pin) ((pin) | ((dev) << 3))
|
|
|
|
static int __init ixdp2351_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
u8 bus = dev->bus->number;
|
|
u32 devpin = DEVPIN(PCI_SLOT(dev->devfn), pin);
|
|
struct pci_bus *tmp_bus = dev->bus;
|
|
|
|
/* Primary bus, no interrupts here */
|
|
if (!bus)
|
|
return -1;
|
|
|
|
/* Lookup first leaf in bus tree */
|
|
while ((tmp_bus->parent != NULL) && (tmp_bus->parent->parent != NULL))
|
|
tmp_bus = tmp_bus->parent;
|
|
|
|
/* Select between known bridges */
|
|
switch (tmp_bus->self->devfn | (tmp_bus->self->bus->number << 8)) {
|
|
/* Device is located after first bridge */
|
|
case 0x0008:
|
|
if (tmp_bus == dev->bus) {
|
|
/* Device is located directy after first bridge */
|
|
switch (devpin) {
|
|
/* Onboard 82546 */
|
|
case DEVPIN(1, 1): /* Onboard 82546 ch 0 */
|
|
return IRQ_IXDP2351_INTA_82546;
|
|
case DEVPIN(1, 2): /* Onboard 82546 ch 1 */
|
|
return IRQ_IXDP2351_INTB_82546;
|
|
/* PMC SLOT */
|
|
case DEVPIN(0, 1): /* PMCP INTA# */
|
|
case DEVPIN(2, 4): /* PMCS INTD# */
|
|
return IRQ_IXDP2351_SPCI_PMC_INTA;
|
|
case DEVPIN(0, 2): /* PMCP INTB# */
|
|
case DEVPIN(2, 1): /* PMCS INTA# */
|
|
return IRQ_IXDP2351_SPCI_PMC_INTB;
|
|
case DEVPIN(0, 3): /* PMCP INTC# */
|
|
case DEVPIN(2, 2): /* PMCS INTB# */
|
|
return IRQ_IXDP2351_SPCI_PMC_INTC;
|
|
case DEVPIN(0, 4): /* PMCP INTD# */
|
|
case DEVPIN(2, 3): /* PMCS INTC# */
|
|
return IRQ_IXDP2351_SPCI_PMC_INTD;
|
|
}
|
|
} else {
|
|
/* Device is located indirectly after first bridge */
|
|
/* Not supported now */
|
|
return -1;
|
|
}
|
|
break;
|
|
case 0x0010:
|
|
if (tmp_bus == dev->bus) {
|
|
/* Device is located directy after second bridge */
|
|
/* Secondary bus of second bridge */
|
|
switch (devpin) {
|
|
case DEVPIN(0, 1): /* DB#0 */
|
|
case DEVPIN(0, 2):
|
|
case DEVPIN(0, 3):
|
|
case DEVPIN(0, 4):
|
|
return IRQ_IXDP2351_SPCI_DB_0;
|
|
case DEVPIN(1, 1): /* DB#1 */
|
|
case DEVPIN(1, 2):
|
|
case DEVPIN(1, 3):
|
|
case DEVPIN(1, 4):
|
|
return IRQ_IXDP2351_SPCI_DB_1;
|
|
case DEVPIN(2, 1): /* FIC1 */
|
|
case DEVPIN(2, 2):
|
|
case DEVPIN(2, 3):
|
|
case DEVPIN(2, 4):
|
|
case DEVPIN(3, 1): /* FIC2 */
|
|
case DEVPIN(3, 2):
|
|
case DEVPIN(3, 3):
|
|
case DEVPIN(3, 4):
|
|
return IRQ_IXDP2351_SPCI_FIC;
|
|
}
|
|
} else {
|
|
/* Device is located indirectly after second bridge */
|
|
/* Not supported now */
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
struct hw_pci ixdp2351_pci __initdata = {
|
|
.nr_controllers = 1,
|
|
.preinit = ixp23xx_pci_preinit,
|
|
.setup = ixp23xx_pci_setup,
|
|
.scan = ixp23xx_pci_scan_bus,
|
|
.map_irq = ixdp2351_map_irq,
|
|
};
|
|
|
|
int __init ixdp2351_pci_init(void)
|
|
{
|
|
if (machine_is_ixdp2351())
|
|
pci_common_init(&ixdp2351_pci);
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(ixdp2351_pci_init);
|
|
|
|
/*
|
|
* IXDP2351 Static Mapped I/O
|
|
*/
|
|
static struct map_desc ixdp2351_io_desc[] __initdata = {
|
|
{
|
|
.virtual = IXDP2351_NP_VIRT_BASE,
|
|
.pfn = __phys_to_pfn((u64)IXDP2351_NP_PHYS_BASE),
|
|
.length = IXDP2351_NP_PHYS_SIZE,
|
|
.type = MT_DEVICE
|
|
}, {
|
|
.virtual = IXDP2351_BB_BASE_VIRT,
|
|
.pfn = __phys_to_pfn((u64)IXDP2351_BB_BASE_PHYS),
|
|
.length = IXDP2351_BB_SIZE,
|
|
.type = MT_DEVICE
|
|
}
|
|
};
|
|
|
|
static void __init ixdp2351_map_io(void)
|
|
{
|
|
ixp23xx_map_io();
|
|
iotable_init(ixdp2351_io_desc, ARRAY_SIZE(ixdp2351_io_desc));
|
|
}
|
|
|
|
static struct physmap_flash_data ixdp2351_flash_data = {
|
|
.width = 1,
|
|
};
|
|
|
|
static struct resource ixdp2351_flash_resource = {
|
|
.start = 0x90000000,
|
|
.end = 0x93ffffff,
|
|
.flags = IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct platform_device ixdp2351_flash = {
|
|
.name = "physmap-flash",
|
|
.id = 0,
|
|
.dev = {
|
|
.platform_data = &ixdp2351_flash_data,
|
|
},
|
|
.num_resources = 1,
|
|
.resource = &ixdp2351_flash_resource,
|
|
};
|
|
|
|
static void __init ixdp2351_init(void)
|
|
{
|
|
platform_device_register(&ixdp2351_flash);
|
|
|
|
/*
|
|
* Mark flash as writeable
|
|
*/
|
|
IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE;
|
|
IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE;
|
|
IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE;
|
|
IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE;
|
|
|
|
ixp23xx_sys_init();
|
|
}
|
|
|
|
MACHINE_START(IXDP2351, "Intel IXDP2351 Development Platform")
|
|
/* Maintainer: MontaVista Software, Inc. */
|
|
.phys_io = IXP23XX_PERIPHERAL_PHYS,
|
|
.io_pg_offst = ((IXP23XX_PERIPHERAL_VIRT >> 18)) & 0xfffc,
|
|
.map_io = ixdp2351_map_io,
|
|
.init_irq = ixdp2351_init_irq,
|
|
.timer = &ixp23xx_timer,
|
|
.boot_params = 0x00000100,
|
|
.init_machine = ixdp2351_init,
|
|
MACHINE_END
|