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linux/arch/arm/mach-ixp2000/ixdp2x01.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

460 lines
12 KiB
C
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/*
* arch/arm/mach-ixp2000/ixdp2x01.c
*
* Code common to Intel IXDP2401 and IXDP2801 platforms
*
* Original Author: Andrzej Mialkowski <andrzej.mialkowski@intel.com>
* Maintainer: Deepak Saxena <dsaxena@plexity.net>
*
* Copyright (C) 2002-2003 Intel Corp.
* Copyright (C) 2003-2004 MontaVista Software, Inc.
*
* 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/mm.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/system.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/pci.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
/*************************************************************************
* IXDP2x01 IRQ Handling
*************************************************************************/
static void ixdp2x01_irq_mask(unsigned int irq)
{
ixp2000_reg_wrb(IXDP2X01_INT_MASK_SET_REG,
IXP2000_BOARD_IRQ_MASK(irq));
}
static void ixdp2x01_irq_unmask(unsigned int irq)
{
ixp2000_reg_write(IXDP2X01_INT_MASK_CLR_REG,
IXP2000_BOARD_IRQ_MASK(irq));
}
static u32 valid_irq_mask;
static void ixdp2x01_irq_handler(unsigned int irq, struct irqdesc *desc)
{
u32 ex_interrupt;
int i;
desc->chip->mask(irq);
ex_interrupt = *IXDP2X01_INT_STAT_REG & valid_irq_mask;
if (!ex_interrupt) {
printk(KERN_ERR "Spurious IXDP2X01 CPLD interrupt!\n");
return;
}
for (i = 0; i < IXP2000_BOARD_IRQS; i++) {
if (ex_interrupt & (1 << i)) {
struct irqdesc *cpld_desc;
int cpld_irq = IXP2000_BOARD_IRQ(0) + i;
cpld_desc = irq_desc + cpld_irq;
desc_handle_irq(cpld_irq, cpld_desc);
}
}
desc->chip->unmask(irq);
}
static struct irqchip ixdp2x01_irq_chip = {
.mask = ixdp2x01_irq_mask,
.ack = ixdp2x01_irq_mask,
.unmask = ixdp2x01_irq_unmask
};
/*
* We only do anything if we are the master NPU on the board.
* The slave NPU only has the ethernet chip going directly to
* the PCIB interrupt input.
*/
void __init ixdp2x01_init_irq(void)
{
int irq = 0;
/* initialize chip specific interrupts */
ixp2000_init_irq();
if (machine_is_ixdp2401())
valid_irq_mask = IXDP2401_VALID_IRQ_MASK;
else
valid_irq_mask = IXDP2801_VALID_IRQ_MASK;
/* Mask all interrupts from CPLD, disable simulation */
ixp2000_reg_write(IXDP2X01_INT_MASK_SET_REG, 0xffffffff);
ixp2000_reg_wrb(IXDP2X01_INT_SIM_REG, 0);
for (irq = NR_IXP2000_IRQS; irq < NR_IXDP2X01_IRQS; irq++) {
if (irq & valid_irq_mask) {
set_irq_chip(irq, &ixdp2x01_irq_chip);
set_irq_handler(irq, do_level_IRQ);
set_irq_flags(irq, IRQF_VALID);
} else {
set_irq_flags(irq, 0);
}
}
/* Hook into PCI interrupts */
set_irq_chained_handler(IRQ_IXP2000_PCIB, ixdp2x01_irq_handler);
}
/*************************************************************************
* IXDP2x01 memory map
*************************************************************************/
static struct map_desc ixdp2x01_io_desc __initdata = {
.virtual = IXDP2X01_VIRT_CPLD_BASE,
.pfn = __phys_to_pfn(IXDP2X01_PHYS_CPLD_BASE),
.length = IXDP2X01_CPLD_REGION_SIZE,
.type = MT_DEVICE
};
static void __init ixdp2x01_map_io(void)
{
ixp2000_map_io();
iotable_init(&ixdp2x01_io_desc, 1);
}
/*************************************************************************
* IXDP2x01 serial ports
*************************************************************************/
static struct plat_serial8250_port ixdp2x01_serial_port1[] = {
{
.mapbase = (unsigned long)IXDP2X01_UART1_PHYS_BASE,
.membase = (char *)IXDP2X01_UART1_VIRT_BASE,
.irq = IRQ_IXDP2X01_UART1,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.iotype = UPIO_MEM32,
.regshift = 2,
.uartclk = IXDP2X01_UART_CLK,
},
{ }
};
static struct resource ixdp2x01_uart_resource1 = {
.start = IXDP2X01_UART1_PHYS_BASE,
.end = IXDP2X01_UART1_PHYS_BASE + 0xffff,
.flags = IORESOURCE_MEM,
};
static struct platform_device ixdp2x01_serial_device1 = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM1,
.dev = {
.platform_data = ixdp2x01_serial_port1,
},
.num_resources = 1,
.resource = &ixdp2x01_uart_resource1,
};
static struct plat_serial8250_port ixdp2x01_serial_port2[] = {
{
.mapbase = (unsigned long)IXDP2X01_UART2_PHYS_BASE,
.membase = (char *)IXDP2X01_UART2_VIRT_BASE,
.irq = IRQ_IXDP2X01_UART2,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
.iotype = UPIO_MEM32,
.regshift = 2,
.uartclk = IXDP2X01_UART_CLK,
},
{ }
};
static struct resource ixdp2x01_uart_resource2 = {
.start = IXDP2X01_UART2_PHYS_BASE,
.end = IXDP2X01_UART2_PHYS_BASE + 0xffff,
.flags = IORESOURCE_MEM,
};
static struct platform_device ixdp2x01_serial_device2 = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM2,
.dev = {
.platform_data = ixdp2x01_serial_port2,
},
.num_resources = 1,
.resource = &ixdp2x01_uart_resource2,
};
static void ixdp2x01_uart_init(void)
{
platform_device_register(&ixdp2x01_serial_device1);
platform_device_register(&ixdp2x01_serial_device2);
}
/*************************************************************************
* IXDP2x01 timer tick configuration
*************************************************************************/
static unsigned int ixdp2x01_clock;
static int __init ixdp2x01_clock_setup(char *str)
{
ixdp2x01_clock = simple_strtoul(str, NULL, 10);
return 1;
}
__setup("ixdp2x01_clock=", ixdp2x01_clock_setup);
static void __init ixdp2x01_timer_init(void)
{
if (!ixdp2x01_clock)
ixdp2x01_clock = 50000000;
ixp2000_init_time(ixdp2x01_clock);
}
static struct sys_timer ixdp2x01_timer = {
.init = ixdp2x01_timer_init,
.offset = ixp2000_gettimeoffset,
};
/*************************************************************************
* IXDP2x01 PCI
*************************************************************************/
void __init ixdp2x01_pci_preinit(void)
{
ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00000000);
ixp2000_pci_preinit();
pcibios_setup("firmware");
}
#define DEVPIN(dev, pin) ((pin) | ((dev) << 3))
static int __init ixdp2x01_pci_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 == 0) {
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 MB bridge */
case 0x0008:
if (tmp_bus == dev->bus) {
/* Device is located directy after first MB bridge */
switch (devpin) {
case DEVPIN(1, 1): /* Onboard 82546 ch 0 */
if (machine_is_ixdp2401())
return IRQ_IXDP2401_INTA_82546;
return -1;
case DEVPIN(1, 2): /* Onboard 82546 ch 1 */
if (machine_is_ixdp2401())
return IRQ_IXDP2401_INTB_82546;
return -1;
case DEVPIN(0, 1): /* PMC INTA# */
return IRQ_IXDP2X01_SPCI_PMC_INTA;
case DEVPIN(0, 2): /* PMC INTB# */
return IRQ_IXDP2X01_SPCI_PMC_INTB;
case DEVPIN(0, 3): /* PMC INTC# */
return IRQ_IXDP2X01_SPCI_PMC_INTC;
case DEVPIN(0, 4): /* PMC INTD# */
return IRQ_IXDP2X01_SPCI_PMC_INTD;
}
}
break;
case 0x0010:
if (tmp_bus == dev->bus) {
/* Device is located directy after second MB bridge */
/* Secondary bus of second bridge */
switch (devpin) {
case DEVPIN(0, 1): /* DB#0 */
return IRQ_IXDP2X01_SPCI_DB_0;
case DEVPIN(1, 1): /* DB#1 */
return IRQ_IXDP2X01_SPCI_DB_1;
}
} else {
/* Device is located indirectly after second MB bridge */
/* Not supported now */
}
break;
}
return -1;
}
static int ixdp2x01_pci_setup(int nr, struct pci_sys_data *sys)
{
sys->mem_offset = 0xe0000000;
if (machine_is_ixdp2801() || machine_is_ixdp28x5())
sys->mem_offset -= ((*IXP2000_PCI_ADDR_EXT & 0xE000) << 16);
return ixp2000_pci_setup(nr, sys);
}
struct hw_pci ixdp2x01_pci __initdata = {
.nr_controllers = 1,
.setup = ixdp2x01_pci_setup,
.preinit = ixdp2x01_pci_preinit,
.scan = ixp2000_pci_scan_bus,
.map_irq = ixdp2x01_pci_map_irq,
};
int __init ixdp2x01_pci_init(void)
{
if (machine_is_ixdp2401() || machine_is_ixdp2801() ||\
machine_is_ixdp28x5())
pci_common_init(&ixdp2x01_pci);
return 0;
}
subsys_initcall(ixdp2x01_pci_init);
/*************************************************************************
* IXDP2x01 Machine Intialization
*************************************************************************/
static struct flash_platform_data ixdp2x01_flash_platform_data = {
.map_name = "cfi_probe",
.width = 1,
};
static unsigned long ixdp2x01_flash_bank_setup(unsigned long ofs)
{
ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG,
((ofs >> IXDP2X01_FLASH_WINDOW_BITS) | IXDP2X01_CPLD_FLASH_INTERN));
return (ofs & IXDP2X01_FLASH_WINDOW_MASK);
}
static struct ixp2000_flash_data ixdp2x01_flash_data = {
.platform_data = &ixdp2x01_flash_platform_data,
.bank_setup = ixdp2x01_flash_bank_setup
};
static struct resource ixdp2x01_flash_resource = {
.start = 0xc4000000,
.end = 0xc4000000 + 0x01ffffff,
.flags = IORESOURCE_MEM,
};
static struct platform_device ixdp2x01_flash = {
.name = "IXP2000-Flash",
.id = 0,
.dev = {
.platform_data = &ixdp2x01_flash_data,
},
.num_resources = 1,
.resource = &ixdp2x01_flash_resource,
};
static struct ixp2000_i2c_pins ixdp2x01_i2c_gpio_pins = {
.sda_pin = IXDP2X01_GPIO_SDA,
.scl_pin = IXDP2X01_GPIO_SCL,
};
static struct platform_device ixdp2x01_i2c_controller = {
.name = "IXP2000-I2C",
.id = 0,
.dev = {
.platform_data = &ixdp2x01_i2c_gpio_pins,
},
.num_resources = 0
};
static struct platform_device *ixdp2x01_devices[] __initdata = {
&ixdp2x01_flash,
&ixdp2x01_i2c_controller
};
static void __init ixdp2x01_init_machine(void)
{
ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG,
(IXDP2X01_CPLD_FLASH_BANK_MASK | IXDP2X01_CPLD_FLASH_INTERN));
ixdp2x01_flash_data.nr_banks =
((*IXDP2X01_CPLD_FLASH_REG & IXDP2X01_CPLD_FLASH_BANK_MASK) + 1);
platform_add_devices(ixdp2x01_devices, ARRAY_SIZE(ixdp2x01_devices));
ixp2000_uart_init();
ixdp2x01_uart_init();
}
#ifdef CONFIG_ARCH_IXDP2401
MACHINE_START(IXDP2401, "Intel IXDP2401 Development Platform")
/* Maintainer: MontaVista Software, Inc. */
.phys_io = IXP2000_UART_PHYS_BASE,
.io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.map_io = ixdp2x01_map_io,
.init_irq = ixdp2x01_init_irq,
.timer = &ixdp2x01_timer,
.init_machine = ixdp2x01_init_machine,
MACHINE_END
#endif
#ifdef CONFIG_ARCH_IXDP2801
MACHINE_START(IXDP2801, "Intel IXDP2801 Development Platform")
/* Maintainer: MontaVista Software, Inc. */
.phys_io = IXP2000_UART_PHYS_BASE,
.io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.map_io = ixdp2x01_map_io,
.init_irq = ixdp2x01_init_irq,
.timer = &ixdp2x01_timer,
.init_machine = ixdp2x01_init_machine,
MACHINE_END
/*
* IXDP28x5 is basically an IXDP2801 with a different CPU but Intel
* changed the machine ID in the bootloader
*/
MACHINE_START(IXDP28X5, "Intel IXDP2805/2855 Development Platform")
/* Maintainer: MontaVista Software, Inc. */
.phys_io = IXP2000_UART_PHYS_BASE,
.io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.map_io = ixdp2x01_map_io,
.init_irq = ixdp2x01_init_irq,
.timer = &ixdp2x01_timer,
.init_machine = ixdp2x01_init_machine,
MACHINE_END
#endif
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