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android_kernel_xiaomi_sdm845/arch/arm/mach-ixp23xx/ixdp2351.c
Linus Torvalds 0cd61b68c3 Initial blind fixup for arm for irq changes 
Untested, but this should fix up the bulk of the totally mechanical
issues, and should make the actual detail fixing easier.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-06 10:59:54 -07:00

345 lines
8.4 KiB
C
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/*
* 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)
{
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);
}
}
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)
{
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);
}
}
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
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