[mirror_ubuntu-bionic-kernel.git] / arch / arm / mach-ixp2000 / core.c

/*
 * arch/arm/mach-ixp2000/core.c
 *
 * Common routines used by all IXP2400/2800 based platforms.
 *
 * Author: Deepak Saxena <dsaxena@plexity.net>
 *
 * Copyright 2004 (C) MontaVista Software, Inc. 
 *
 * Based on work Copyright (C) 2002-2003 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/serial_8250.h>
#include <linux/mm.h>

#include <asm/types.h>
#include <asm/setup.h>
#include <asm/memory.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/tlbflush.h>
#include <asm/pgtable.h>

#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/mach/irq.h>

#include <asm/arch/gpio.h>

static DEFINE_SPINLOCK(ixp2000_slowport_lock);
static unsigned long ixp2000_slowport_irq_flags;

/*************************************************************************
 * Slowport access routines
 *************************************************************************/
void ixp2000_acquire_slowport(struct slowport_cfg *new_cfg, struct slowport_cfg *old_cfg)
{
	spin_lock_irqsave(&ixp2000_slowport_lock, ixp2000_slowport_irq_flags);

	old_cfg->CCR = *IXP2000_SLOWPORT_CCR;
	old_cfg->WTC = *IXP2000_SLOWPORT_WTC2;
	old_cfg->RTC = *IXP2000_SLOWPORT_RTC2;
	old_cfg->PCR = *IXP2000_SLOWPORT_PCR;
	old_cfg->ADC = *IXP2000_SLOWPORT_ADC;

	ixp2000_reg_write(IXP2000_SLOWPORT_CCR, new_cfg->CCR);
	ixp2000_reg_write(IXP2000_SLOWPORT_WTC2, new_cfg->WTC);
	ixp2000_reg_write(IXP2000_SLOWPORT_RTC2, new_cfg->RTC);
	ixp2000_reg_write(IXP2000_SLOWPORT_PCR, new_cfg->PCR);
	ixp2000_reg_wrb(IXP2000_SLOWPORT_ADC, new_cfg->ADC);
}

void ixp2000_release_slowport(struct slowport_cfg *old_cfg)
{
	ixp2000_reg_write(IXP2000_SLOWPORT_CCR, old_cfg->CCR);
	ixp2000_reg_write(IXP2000_SLOWPORT_WTC2, old_cfg->WTC);
	ixp2000_reg_write(IXP2000_SLOWPORT_RTC2, old_cfg->RTC);
	ixp2000_reg_write(IXP2000_SLOWPORT_PCR, old_cfg->PCR);
	ixp2000_reg_wrb(IXP2000_SLOWPORT_ADC, old_cfg->ADC);

	spin_unlock_irqrestore(&ixp2000_slowport_lock, 
					ixp2000_slowport_irq_flags);
}

/*************************************************************************
 * Chip specific mappings shared by all IXP2000 systems
 *************************************************************************/
static struct map_desc ixp2000_io_desc[] __initdata = {
	{
		.virtual	= IXP2000_CAP_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_CAP_PHYS_BASE),
		.length		= IXP2000_CAP_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_INTCTL_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_INTCTL_PHYS_BASE),
		.length		= IXP2000_INTCTL_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_PCI_CREG_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_PCI_CREG_PHYS_BASE),
		.length		= IXP2000_PCI_CREG_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_PCI_CSR_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_PCI_CSR_PHYS_BASE),
		.length		= IXP2000_PCI_CSR_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_MSF_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_MSF_PHYS_BASE),
		.length		= IXP2000_MSF_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_SCRATCH_RING_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_SCRATCH_RING_PHYS_BASE),
		.length		= IXP2000_SCRATCH_RING_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_SRAM0_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_SRAM0_PHYS_BASE),
		.length		= IXP2000_SRAM0_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_PCI_IO_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_PCI_IO_PHYS_BASE),
		.length		= IXP2000_PCI_IO_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_PCI_CFG0_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_PCI_CFG0_PHYS_BASE),
		.length		= IXP2000_PCI_CFG0_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}, {
		.virtual	= IXP2000_PCI_CFG1_VIRT_BASE,
		.pfn		= __phys_to_pfn(IXP2000_PCI_CFG1_PHYS_BASE),
		.length		= IXP2000_PCI_CFG1_SIZE,
		.type		= MT_DEVICE_IXP2000,
	}
};

void __init ixp2000_map_io(void)
{
	/*
	 * On IXP2400 CPUs we need to use MT_DEVICE_IXP2000 so that
	 * XCB=101 (to avoid triggering erratum #66), and given that
	 * this mode speeds up I/O accesses and we have write buffer
	 * flushes in the right places anyway, it doesn't hurt to use
	 * XCB=101 for all IXP2000s.
	 */
	iotable_init(ixp2000_io_desc, ARRAY_SIZE(ixp2000_io_desc));

	/* Set slowport to 8-bit mode.  */
	ixp2000_reg_wrb(IXP2000_SLOWPORT_FRM, 1);
}


/*************************************************************************
 * Serial port support for IXP2000
 *************************************************************************/
static struct plat_serial8250_port ixp2000_serial_port[] = {
	{
		.mapbase	= IXP2000_UART_PHYS_BASE,
		.membase	= (char *)(IXP2000_UART_VIRT_BASE + 3),
		.irq		= IRQ_IXP2000_UART,
		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
		.iotype		= UPIO_MEM,
		.regshift	= 2,
		.uartclk	= 50000000,
	},
	{ },
};

static struct resource ixp2000_uart_resource = {
	.start		= IXP2000_UART_PHYS_BASE,
	.end		= IXP2000_UART_PHYS_BASE + 0x1f,
	.flags		= IORESOURCE_MEM,
};

static struct platform_device ixp2000_serial_device = {
	.name		= "serial8250",
	.id		= PLAT8250_DEV_PLATFORM,
	.dev		= {
		.platform_data		= ixp2000_serial_port,
	},
	.num_resources	= 1,
	.resource	= &ixp2000_uart_resource,
};

void __init ixp2000_uart_init(void)
{
	platform_device_register(&ixp2000_serial_device);
}


/*************************************************************************
 * Timer-tick functions for IXP2000
 *************************************************************************/
static unsigned ticks_per_jiffy;
static unsigned ticks_per_usec;
static unsigned next_jiffy_time;
static volatile unsigned long *missing_jiffy_timer_csr;

unsigned long ixp2000_gettimeoffset (void)
{
 	unsigned long offset;

	offset = next_jiffy_time - *missing_jiffy_timer_csr;

	return offset / ticks_per_usec;
}

static int ixp2000_timer_interrupt(int irq, void *dev_id)
{
	/* clear timer 1 */
	ixp2000_reg_wrb(IXP2000_T1_CLR, 1);

	while ((signed long)(next_jiffy_time - *missing_jiffy_timer_csr)
							>= ticks_per_jiffy) {
		timer_tick();
		next_jiffy_time -= ticks_per_jiffy;
	}

	return IRQ_HANDLED;
}

static struct irqaction ixp2000_timer_irq = {
	.name		= "IXP2000 Timer Tick",
	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
	.handler	= ixp2000_timer_interrupt,
};

void __init ixp2000_init_time(unsigned long tick_rate)
{
	ticks_per_jiffy = (tick_rate + HZ/2) / HZ;
	ticks_per_usec = tick_rate / 1000000;

	/*
	 * We use timer 1 as our timer interrupt.
	 */
	ixp2000_reg_write(IXP2000_T1_CLR, 0);
	ixp2000_reg_write(IXP2000_T1_CLD, ticks_per_jiffy - 1);
	ixp2000_reg_write(IXP2000_T1_CTL, (1 << 7));

	/*
	 * We use a second timer as a monotonic counter for tracking
	 * missed jiffies.  The IXP2000 has four timers, but if we're
	 * on an A-step IXP2800, timer 2 and 3 don't work, so on those
	 * chips we use timer 4.  Timer 4 is the only timer that can
	 * be used for the watchdog, so we use timer 2 if we're on a
	 * non-buggy chip.
	 */
	if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) {
		printk(KERN_INFO "Enabling IXP2800 erratum #25 workaround\n");

		ixp2000_reg_write(IXP2000_T4_CLR, 0);
		ixp2000_reg_write(IXP2000_T4_CLD, -1);
		ixp2000_reg_wrb(IXP2000_T4_CTL, (1 << 7));
		missing_jiffy_timer_csr = IXP2000_T4_CSR;
	} else {
		ixp2000_reg_write(IXP2000_T2_CLR, 0);
		ixp2000_reg_write(IXP2000_T2_CLD, -1);
		ixp2000_reg_wrb(IXP2000_T2_CTL, (1 << 7));
		missing_jiffy_timer_csr = IXP2000_T2_CSR;
	}
 	next_jiffy_time = 0xffffffff;

	/* register for interrupt */
	setup_irq(IRQ_IXP2000_TIMER1, &ixp2000_timer_irq);
}

/*************************************************************************
 * GPIO helpers
 *************************************************************************/
static unsigned long GPIO_IRQ_falling_edge;
static unsigned long GPIO_IRQ_rising_edge;
static unsigned long GPIO_IRQ_level_low;
static unsigned long GPIO_IRQ_level_high;

static void update_gpio_int_csrs(void)
{
	ixp2000_reg_write(IXP2000_GPIO_FEDR, GPIO_IRQ_falling_edge);
	ixp2000_reg_write(IXP2000_GPIO_REDR, GPIO_IRQ_rising_edge);
	ixp2000_reg_write(IXP2000_GPIO_LSLR, GPIO_IRQ_level_low);
	ixp2000_reg_wrb(IXP2000_GPIO_LSHR, GPIO_IRQ_level_high);
}

void gpio_line_config(int line, int direction)
{
	unsigned long flags;

	local_irq_save(flags);
	if (direction == GPIO_OUT) {
		/* if it's an output, it ain't an interrupt anymore */
		GPIO_IRQ_falling_edge &= ~(1 << line);
		GPIO_IRQ_rising_edge &= ~(1 << line);
		GPIO_IRQ_level_low &= ~(1 << line);
		GPIO_IRQ_level_high &= ~(1 << line);
		update_gpio_int_csrs();

		ixp2000_reg_wrb(IXP2000_GPIO_PDSR, 1 << line);
	} else if (direction == GPIO_IN) {
		ixp2000_reg_wrb(IXP2000_GPIO_PDCR, 1 << line);
	}
	local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_line_config);


/*************************************************************************
 * IRQ handling IXP2000
 *************************************************************************/
static void ixp2000_GPIO_irq_handler(unsigned int irq, struct irq_desc *desc)
{                               
	int i;
	unsigned long status = *IXP2000_GPIO_INST;
		   
	for (i = 0; i <= 7; i++) {
		if (status & (1<<i)) {
			desc = irq_desc + i + IRQ_IXP2000_GPIO0;
			desc_handle_irq(i + IRQ_IXP2000_GPIO0, desc);
		}
	}
}

static int ixp2000_GPIO_irq_type(unsigned int irq, unsigned int type)
{
	int line = irq - IRQ_IXP2000_GPIO0;

	/*
	 * First, configure this GPIO line as an input.
	 */
	ixp2000_reg_write(IXP2000_GPIO_PDCR, 1 << line);

	/*
	 * Then, set the proper trigger type.
	 */
	if (type & IRQT_FALLING)
		GPIO_IRQ_falling_edge |= 1 << line;
	else
		GPIO_IRQ_falling_edge &= ~(1 << line);
	if (type & IRQT_RISING)
		GPIO_IRQ_rising_edge |= 1 << line;
	else
		GPIO_IRQ_rising_edge &= ~(1 << line);
	if (type & IRQT_LOW)
		GPIO_IRQ_level_low |= 1 << line;
	else
		GPIO_IRQ_level_low &= ~(1 << line);
	if (type & IRQT_HIGH)
		GPIO_IRQ_level_high |= 1 << line;
	else
		GPIO_IRQ_level_high &= ~(1 << line);
	update_gpio_int_csrs();

	return 0;
}

static void ixp2000_GPIO_irq_mask_ack(unsigned int irq)
{
	ixp2000_reg_write(IXP2000_GPIO_INCR, (1 << (irq - IRQ_IXP2000_GPIO0)));

	ixp2000_reg_write(IXP2000_GPIO_EDSR, (1 << (irq - IRQ_IXP2000_GPIO0)));
	ixp2000_reg_write(IXP2000_GPIO_LDSR, (1 << (irq - IRQ_IXP2000_GPIO0)));
	ixp2000_reg_wrb(IXP2000_GPIO_INST, (1 << (irq - IRQ_IXP2000_GPIO0)));
}

static void ixp2000_GPIO_irq_mask(unsigned int irq)
{
	ixp2000_reg_wrb(IXP2000_GPIO_INCR, (1 << (irq - IRQ_IXP2000_GPIO0)));
}

static void ixp2000_GPIO_irq_unmask(unsigned int irq)
{
	ixp2000_reg_write(IXP2000_GPIO_INSR, (1 << (irq - IRQ_IXP2000_GPIO0)));
}

static struct irq_chip ixp2000_GPIO_irq_chip = {
	.ack		= ixp2000_GPIO_irq_mask_ack,
	.mask		= ixp2000_GPIO_irq_mask,
	.unmask		= ixp2000_GPIO_irq_unmask,
	.set_type	= ixp2000_GPIO_irq_type,
};

static void ixp2000_pci_irq_mask(unsigned int irq)
{
	unsigned long temp = *IXP2000_PCI_XSCALE_INT_ENABLE;
	if (irq == IRQ_IXP2000_PCIA)
		ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, (temp & ~(1 << 26)));
	else if (irq == IRQ_IXP2000_PCIB)
		ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, (temp & ~(1 << 27)));
}

static void ixp2000_pci_irq_unmask(unsigned int irq)
{
	unsigned long temp = *IXP2000_PCI_XSCALE_INT_ENABLE;
	if (irq == IRQ_IXP2000_PCIA)
		ixp2000_reg_write(IXP2000_PCI_XSCALE_INT_ENABLE, (temp | (1 << 26)));
	else if (irq == IRQ_IXP2000_PCIB)
		ixp2000_reg_write(IXP2000_PCI_XSCALE_INT_ENABLE, (temp | (1 << 27)));
}

/*
 * Error interrupts. These are used extensively by the microengine drivers
 */
static void ixp2000_err_irq_handler(unsigned int irq, struct irq_desc *desc)
{
	int i;
	unsigned long status = *IXP2000_IRQ_ERR_STATUS;

	for(i = 31; i >= 0; i--) {
		if(status & (1 << i)) {
			desc = irq_desc + IRQ_IXP2000_DRAM0_MIN_ERR + i;
			desc_handle_irq(IRQ_IXP2000_DRAM0_MIN_ERR + i, desc);
		}
	}
}

static void ixp2000_err_irq_mask(unsigned int irq)
{
	ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_CLR,
			(1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)));
}

static void ixp2000_err_irq_unmask(unsigned int irq)
{
	ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_SET,
			(1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)));
}

static struct irq_chip ixp2000_err_irq_chip = {
	.ack	= ixp2000_err_irq_mask,
	.mask	= ixp2000_err_irq_mask,
	.unmask	= ixp2000_err_irq_unmask
};

static struct irq_chip ixp2000_pci_irq_chip = {
	.ack	= ixp2000_pci_irq_mask,
	.mask	= ixp2000_pci_irq_mask,
	.unmask	= ixp2000_pci_irq_unmask
};

static void ixp2000_irq_mask(unsigned int irq)
{
	ixp2000_reg_wrb(IXP2000_IRQ_ENABLE_CLR, (1 << irq));
}

static void ixp2000_irq_unmask(unsigned int irq)
{
	ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET, (1 << irq));
}

static struct irq_chip ixp2000_irq_chip = {
	.ack	= ixp2000_irq_mask,
	.mask	= ixp2000_irq_mask,
	.unmask	= ixp2000_irq_unmask
};

void __init ixp2000_init_irq(void)
{
	int irq;

	/*
	 * Mask all sources
	 */
	ixp2000_reg_write(IXP2000_IRQ_ENABLE_CLR, 0xffffffff);
	ixp2000_reg_write(IXP2000_FIQ_ENABLE_CLR, 0xffffffff);

	/* clear all GPIO edge/level detects */
	ixp2000_reg_write(IXP2000_GPIO_REDR, 0);
	ixp2000_reg_write(IXP2000_GPIO_FEDR, 0);
	ixp2000_reg_write(IXP2000_GPIO_LSHR, 0);
	ixp2000_reg_write(IXP2000_GPIO_LSLR, 0);
	ixp2000_reg_write(IXP2000_GPIO_INCR, -1);

	/* clear PCI interrupt sources */
	ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, 0);

	/*
	 * Certain bits in the IRQ status register of the 
	 * IXP2000 are reserved. Instead of trying to map
	 * things non 1:1 from bit position to IRQ number,
	 * we mark the reserved IRQs as invalid. This makes
	 * our mask/unmask code much simpler.
	 */
	for (irq = IRQ_IXP2000_SOFT_INT; irq <= IRQ_IXP2000_THDB3; irq++) {
		if ((1 << irq) & IXP2000_VALID_IRQ_MASK) {
			set_irq_chip(irq, &ixp2000_irq_chip);
			set_irq_handler(irq, handle_level_irq);
			set_irq_flags(irq, IRQF_VALID);
		} else set_irq_flags(irq, 0);
	}

	for (irq = IRQ_IXP2000_DRAM0_MIN_ERR; irq <= IRQ_IXP2000_SP_INT; irq++) {
		if((1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)) &
				IXP2000_VALID_ERR_IRQ_MASK) {
			set_irq_chip(irq, &ixp2000_err_irq_chip);
			set_irq_handler(irq, handle_level_irq);
			set_irq_flags(irq, IRQF_VALID);
		}
		else
			set_irq_flags(irq, 0);
	}
	set_irq_chained_handler(IRQ_IXP2000_ERRSUM, ixp2000_err_irq_handler);

	for (irq = IRQ_IXP2000_GPIO0; irq <= IRQ_IXP2000_GPIO7; irq++) {
		set_irq_chip(irq, &ixp2000_GPIO_irq_chip);
		set_irq_handler(irq, handle_level_irq);
		set_irq_flags(irq, IRQF_VALID);
	}
	set_irq_chained_handler(IRQ_IXP2000_GPIO, ixp2000_GPIO_irq_handler);

	/*
	 * Enable PCI irqs.  The actual PCI[AB] decoding is done in
	 * entry-macro.S, so we don't need a chained handler for the
	 * PCI interrupt source.
	 */
	ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET, (1 << IRQ_IXP2000_PCI));
	for (irq = IRQ_IXP2000_PCIA; irq <= IRQ_IXP2000_PCIB; irq++) {
		set_irq_chip(irq, &ixp2000_pci_irq_chip);
		set_irq_handler(irq, handle_level_irq);
		set_irq_flags(irq, IRQF_VALID);
	}
}
Commit	Line	Data
1da177e4	1	/*
fa87cedd	2	* arch/arm/mach-ixp2000/core.c
1da177e4 LT	3	*
	4	* Common routines used by all IXP2400/2800 based platforms.
	5	*
	6	* Author: Deepak Saxena <dsaxena@plexity.net>
	7	*
	8	* Copyright 2004 (C) MontaVista Software, Inc.
	9	*
	10	* Based on work Copyright (C) 2002-2003 Intel Corporation
	11	*
	12	* This file is licensed under the terms of the GNU General Public
	13	* License version 2. This program is licensed "as is" without any
	14	* warranty of any kind, whether express or implied.
	15	*/
	16
1da177e4 LT	17	#include <linux/kernel.h>
	18	#include <linux/init.h>
	19	#include <linux/spinlock.h>
	20	#include <linux/sched.h>
	21	#include <linux/interrupt.h>
64ffae8a	22	#include <linux/irq.h>
1da177e4 LT	23	#include <linux/serial.h>
	24	#include <linux/tty.h>
	25	#include <linux/bitops.h>
28187f2c	26	#include <linux/serial_8250.h>
1da177e4 LT	27	#include <linux/mm.h>
	28
	29	#include <asm/types.h>
	30	#include <asm/setup.h>
	31	#include <asm/memory.h>
	32	#include <asm/hardware.h>
1da177e4 LT	33	#include <asm/irq.h>
	34	#include <asm/system.h>
	35	#include <asm/tlbflush.h>
	36	#include <asm/pgtable.h>
	37
	38	#include <asm/mach/map.h>
	39	#include <asm/mach/time.h>
	40	#include <asm/mach/irq.h>
	41
c4982887 LB	42	#include <asm/arch/gpio.h>
c4982887 LB	43
1da177e4 LT	44	static DEFINE_SPINLOCK(ixp2000_slowport_lock);
	45	static unsigned long ixp2000_slowport_irq_flags;
	46
	47	/*************************************************************************
	48	* Slowport access routines
	49	*************************************************************************/
	50	void ixp2000_acquire_slowport(struct slowport_cfg new_cfg, struct slowport_cfg old_cfg)
	51	{
1da177e4 LT	52	spin_lock_irqsave(&ixp2000_slowport_lock, ixp2000_slowport_irq_flags);
	53
	54	old_cfg->CCR = *IXP2000_SLOWPORT_CCR;
	55	old_cfg->WTC = *IXP2000_SLOWPORT_WTC2;
	56	old_cfg->RTC = *IXP2000_SLOWPORT_RTC2;
	57	old_cfg->PCR = *IXP2000_SLOWPORT_PCR;
	58	old_cfg->ADC = *IXP2000_SLOWPORT_ADC;
	59
	60	ixp2000_reg_write(IXP2000_SLOWPORT_CCR, new_cfg->CCR);
	61	ixp2000_reg_write(IXP2000_SLOWPORT_WTC2, new_cfg->WTC);
	62	ixp2000_reg_write(IXP2000_SLOWPORT_RTC2, new_cfg->RTC);
	63	ixp2000_reg_write(IXP2000_SLOWPORT_PCR, new_cfg->PCR);
e9b72e43	64	ixp2000_reg_wrb(IXP2000_SLOWPORT_ADC, new_cfg->ADC);
1da177e4 LT	65	}
	66
	67	void ixp2000_release_slowport(struct slowport_cfg *old_cfg)
	68	{
	69	ixp2000_reg_write(IXP2000_SLOWPORT_CCR, old_cfg->CCR);
	70	ixp2000_reg_write(IXP2000_SLOWPORT_WTC2, old_cfg->WTC);
	71	ixp2000_reg_write(IXP2000_SLOWPORT_RTC2, old_cfg->RTC);
	72	ixp2000_reg_write(IXP2000_SLOWPORT_PCR, old_cfg->PCR);
e9b72e43	73	ixp2000_reg_wrb(IXP2000_SLOWPORT_ADC, old_cfg->ADC);
1da177e4 LT	74
	75	spin_unlock_irqrestore(&ixp2000_slowport_lock,
	76	ixp2000_slowport_irq_flags);
	77	}
	78
	79	/*************************************************************************
	80	* Chip specific mappings shared by all IXP2000 systems
	81	*************************************************************************/
	82	static struct map_desc ixp2000_io_desc[] __initdata = {
	83	{
	84	.virtual = IXP2000_CAP_VIRT_BASE,
db0d087e	85	.pfn = __phys_to_pfn(IXP2000_CAP_PHYS_BASE),
1da177e4	86	.length = IXP2000_CAP_SIZE,
0af92bef	87	.type = MT_DEVICE_IXP2000,
1da177e4 LT	88	}, {
1da177e4 LT	89	.virtual = IXP2000_INTCTL_VIRT_BASE,
db0d087e	90	.pfn = __phys_to_pfn(IXP2000_INTCTL_PHYS_BASE),
1da177e4	91	.length = IXP2000_INTCTL_SIZE,
0af92bef	92	.type = MT_DEVICE_IXP2000,
1da177e4 LT	93	}, {
1da177e4 LT	94	.virtual = IXP2000_PCI_CREG_VIRT_BASE,
db0d087e	95	.pfn = __phys_to_pfn(IXP2000_PCI_CREG_PHYS_BASE),
1da177e4	96	.length = IXP2000_PCI_CREG_SIZE,
0af92bef	97	.type = MT_DEVICE_IXP2000,
1da177e4 LT	98	}, {
1da177e4 LT	99	.virtual = IXP2000_PCI_CSR_VIRT_BASE,
db0d087e	100	.pfn = __phys_to_pfn(IXP2000_PCI_CSR_PHYS_BASE),
1da177e4	101	.length = IXP2000_PCI_CSR_SIZE,
0af92bef	102	.type = MT_DEVICE_IXP2000,
baaf7ed1 LB	103	}, {
baaf7ed1 LB	104	.virtual = IXP2000_MSF_VIRT_BASE,
db0d087e	105	.pfn = __phys_to_pfn(IXP2000_MSF_PHYS_BASE),
baaf7ed1	106	.length = IXP2000_MSF_SIZE,
0af92bef	107	.type = MT_DEVICE_IXP2000,
dd29c727 LB	108	}, {
	109	.virtual = IXP2000_SCRATCH_RING_VIRT_BASE,
	110	.pfn = __phys_to_pfn(IXP2000_SCRATCH_RING_PHYS_BASE),
	111	.length = IXP2000_SCRATCH_RING_SIZE,
0af92bef	112	.type = MT_DEVICE_IXP2000,
dd29c727 LB	113	}, {
	114	.virtual = IXP2000_SRAM0_VIRT_BASE,
	115	.pfn = __phys_to_pfn(IXP2000_SRAM0_PHYS_BASE),
	116	.length = IXP2000_SRAM0_SIZE,
0af92bef	117	.type = MT_DEVICE_IXP2000,
1da177e4 LT	118	}, {
1da177e4 LT	119	.virtual = IXP2000_PCI_IO_VIRT_BASE,
db0d087e	120	.pfn = __phys_to_pfn(IXP2000_PCI_IO_PHYS_BASE),
1da177e4	121	.length = IXP2000_PCI_IO_SIZE,
0af92bef	122	.type = MT_DEVICE_IXP2000,
1da177e4 LT	123	}, {
1da177e4 LT	124	.virtual = IXP2000_PCI_CFG0_VIRT_BASE,
db0d087e	125	.pfn = __phys_to_pfn(IXP2000_PCI_CFG0_PHYS_BASE),
1da177e4	126	.length = IXP2000_PCI_CFG0_SIZE,
0af92bef	127	.type = MT_DEVICE_IXP2000,
1da177e4 LT	128	}, {
1da177e4 LT	129	.virtual = IXP2000_PCI_CFG1_VIRT_BASE,
db0d087e	130	.pfn = __phys_to_pfn(IXP2000_PCI_CFG1_PHYS_BASE),
1da177e4	131	.length = IXP2000_PCI_CFG1_SIZE,
0af92bef	132	.type = MT_DEVICE_IXP2000,
1da177e4 LT	133	}
	134	};
	135
1da177e4 LT	136	void __init ixp2000_map_io(void)
1da177e4 LT	137	{
1da177e4	138	/*
0af92bef	139	* On IXP2400 CPUs we need to use MT_DEVICE_IXP2000 so that
5391473f LB	140	* XCB=101 (to avoid triggering erratum #66), and given that
	141	* this mode speeds up I/O accesses and we have write buffer
	142	* flushes in the right places anyway, it doesn't hurt to use
	143	* XCB=101 for all IXP2000s.
1da177e4	144	*/
1da177e4	145	iotable_init(ixp2000_io_desc, ARRAY_SIZE(ixp2000_io_desc));
1da177e4 LT	146
1da177e4 LT	147	/* Set slowport to 8-bit mode. */
e9b72e43	148	ixp2000_reg_wrb(IXP2000_SLOWPORT_FRM, 1);
1da177e4 LT	149	}
1da177e4 LT	150
28187f2c LB	151
	152	/*************************************************************************
	153	* Serial port support for IXP2000
	154	*************************************************************************/
	155	static struct plat_serial8250_port ixp2000_serial_port[] = {
	156	{
	157	.mapbase = IXP2000_UART_PHYS_BASE,
	158	.membase = (char *)(IXP2000_UART_VIRT_BASE + 3),
	159	.irq = IRQ_IXP2000_UART,
	160	.flags = UPF_BOOT_AUTOCONF \| UPF_SKIP_TEST,
	161	.iotype = UPIO_MEM,
	162	.regshift = 2,
	163	.uartclk = 50000000,
	164	},
	165	{ },
	166	};
	167
	168	static struct resource ixp2000_uart_resource = {
	169	.start = IXP2000_UART_PHYS_BASE,
702c96d5	170	.end = IXP2000_UART_PHYS_BASE + 0x1f,
28187f2c LB	171	.flags = IORESOURCE_MEM,
	172	};
	173
	174	static struct platform_device ixp2000_serial_device = {
	175	.name = "serial8250",
6df29deb	176	.id = PLAT8250_DEV_PLATFORM,
28187f2c LB	177	.dev = {
	178	.platform_data = ixp2000_serial_port,
	179	},
	180	.num_resources = 1,
	181	.resource = &ixp2000_uart_resource,
	182	};
	183
	184	void __init ixp2000_uart_init(void)
	185	{
	186	platform_device_register(&ixp2000_serial_device);
	187	}
	188
	189
1da177e4 LT	190	/*************************************************************************
	191	* Timer-tick functions for IXP2000
	192	*************************************************************************/
	193	static unsigned ticks_per_jiffy;
	194	static unsigned ticks_per_usec;
	195	static unsigned next_jiffy_time;
e4fe1981	196	static volatile unsigned long *missing_jiffy_timer_csr;
1da177e4 LT	197
	198	unsigned long ixp2000_gettimeoffset (void)
	199	{
	200	unsigned long offset;
	201
e4fe1981	202	offset = next_jiffy_time - *missing_jiffy_timer_csr;
1da177e4 LT	203
	204	return offset / ticks_per_usec;
	205	}
	206
0cd61b68	207	static int ixp2000_timer_interrupt(int irq, void *dev_id)
1da177e4	208	{
1da177e4	209	/* clear timer 1 */
e9b72e43	210	ixp2000_reg_wrb(IXP2000_T1_CLR, 1);
c4982887	211
f869afab LB	212	while ((signed long)(next_jiffy_time - *missing_jiffy_timer_csr)
f869afab LB	213	>= ticks_per_jiffy) {
0cd61b68	214	timer_tick();
1da177e4 LT	215	next_jiffy_time -= ticks_per_jiffy;
	216	}
	217
1da177e4 LT	218	return IRQ_HANDLED;
	219	}
	220
	221	static struct irqaction ixp2000_timer_irq = {
	222	.name = "IXP2000 Timer Tick",
b30fabad	223	.flags = IRQF_DISABLED \| IRQF_TIMER \| IRQF_IRQPOLL,
09b8b5f8	224	.handler = ixp2000_timer_interrupt,
1da177e4 LT	225	};
	226
	227	void __init ixp2000_init_time(unsigned long tick_rate)
	228	{
1da177e4 LT	229	ticks_per_jiffy = (tick_rate + HZ/2) / HZ;
	230	ticks_per_usec = tick_rate / 1000000;
	231
e4fe1981 LB	232	/*
	233	* We use timer 1 as our timer interrupt.
	234	*/
	235	ixp2000_reg_write(IXP2000_T1_CLR, 0);
1da177e4 LT	236	ixp2000_reg_write(IXP2000_T1_CLD, ticks_per_jiffy - 1);
	237	ixp2000_reg_write(IXP2000_T1_CTL, (1 << 7));
	238
	239	/*
e4fe1981 LB	240	* We use a second timer as a monotonic counter for tracking
	241	* missed jiffies. The IXP2000 has four timers, but if we're
	242	* on an A-step IXP2800, timer 2 and 3 don't work, so on those
	243	* chips we use timer 4. Timer 4 is the only timer that can
	244	* be used for the watchdog, so we use timer 2 if we're on a
	245	* non-buggy chip.
1da177e4	246	*/
e4fe1981 LB	247	if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) {
	248	printk(KERN_INFO "Enabling IXP2800 erratum #25 workaround\n");
	249
	250	ixp2000_reg_write(IXP2000_T4_CLR, 0);
	251	ixp2000_reg_write(IXP2000_T4_CLD, -1);
e9b72e43	252	ixp2000_reg_wrb(IXP2000_T4_CTL, (1 << 7));
e4fe1981 LB	253	missing_jiffy_timer_csr = IXP2000_T4_CSR;
	254	} else {
	255	ixp2000_reg_write(IXP2000_T2_CLR, 0);
	256	ixp2000_reg_write(IXP2000_T2_CLD, -1);
e9b72e43	257	ixp2000_reg_wrb(IXP2000_T2_CTL, (1 << 7));
e4fe1981 LB	258	missing_jiffy_timer_csr = IXP2000_T2_CSR;
e4fe1981 LB	259	}
1da177e4 LT	260	next_jiffy_time = 0xffffffff;
	261
	262	/* register for interrupt */
	263	setup_irq(IRQ_IXP2000_TIMER1, &ixp2000_timer_irq);
	264	}
	265
	266	/*************************************************************************
	267	* GPIO helpers
	268	*************************************************************************/
1da177e4	269	static unsigned long GPIO_IRQ_falling_edge;
c4982887	270	static unsigned long GPIO_IRQ_rising_edge;
1da177e4 LT	271	static unsigned long GPIO_IRQ_level_low;
	272	static unsigned long GPIO_IRQ_level_high;
	273
c4982887 LB	274	static void update_gpio_int_csrs(void)
	275	{
	276	ixp2000_reg_write(IXP2000_GPIO_FEDR, GPIO_IRQ_falling_edge);
	277	ixp2000_reg_write(IXP2000_GPIO_REDR, GPIO_IRQ_rising_edge);
	278	ixp2000_reg_write(IXP2000_GPIO_LSLR, GPIO_IRQ_level_low);
e9b72e43	279	ixp2000_reg_wrb(IXP2000_GPIO_LSHR, GPIO_IRQ_level_high);
c4982887 LB	280	}
	281
	282	void gpio_line_config(int line, int direction)
1da177e4 LT	283	{
	284	unsigned long flags;
	285
	286	local_irq_save(flags);
c4982887	287	if (direction == GPIO_OUT) {
1da177e4	288	/* if it's an output, it ain't an interrupt anymore */
1da177e4 LT	289	GPIO_IRQ_falling_edge &= ~(1 << line);
	290	GPIO_IRQ_rising_edge &= ~(1 << line);
	291	GPIO_IRQ_level_low &= ~(1 << line);
	292	GPIO_IRQ_level_high &= ~(1 << line);
c4982887 LB	293	update_gpio_int_csrs();
c4982887 LB	294
e9b72e43	295	ixp2000_reg_wrb(IXP2000_GPIO_PDSR, 1 << line);
c4982887	296	} else if (direction == GPIO_IN) {
e9b72e43	297	ixp2000_reg_wrb(IXP2000_GPIO_PDCR, 1 << line);
1da177e4	298	}
1da177e4	299	local_irq_restore(flags);
c4982887	300	}
fc8ea7a1	301	EXPORT_SYMBOL(gpio_line_config);
1da177e4 LT	302
	303
	304	/*************************************************************************
	305	* IRQ handling IXP2000
	306	*************************************************************************/
10dd5ce2	307	static void ixp2000_GPIO_irq_handler(unsigned int irq, struct irq_desc *desc)
1da177e4 LT	308	{
	309	int i;
	310	unsigned long status = *IXP2000_GPIO_INST;
	311
	312	for (i = 0; i <= 7; i++) {
	313	if (status & (1<<i)) {
	314	desc = irq_desc + i + IRQ_IXP2000_GPIO0;
0cd61b68	315	desc_handle_irq(i + IRQ_IXP2000_GPIO0, desc);
1da177e4 LT	316	}
	317	}
	318	}
	319
c4982887 LB	320	static int ixp2000_GPIO_irq_type(unsigned int irq, unsigned int type)
	321	{
	322	int line = irq - IRQ_IXP2000_GPIO0;
	323
	324	/*
	325	* First, configure this GPIO line as an input.
	326	*/
	327	ixp2000_reg_write(IXP2000_GPIO_PDCR, 1 << line);
	328
	329	/*
	330	* Then, set the proper trigger type.
	331	*/
	332	if (type & IRQT_FALLING)
	333	GPIO_IRQ_falling_edge \|= 1 << line;
	334	else
	335	GPIO_IRQ_falling_edge &= ~(1 << line);
	336	if (type & IRQT_RISING)
	337	GPIO_IRQ_rising_edge \|= 1 << line;
	338	else
	339	GPIO_IRQ_rising_edge &= ~(1 << line);
	340	if (type & IRQT_LOW)
	341	GPIO_IRQ_level_low \|= 1 << line;
	342	else
	343	GPIO_IRQ_level_low &= ~(1 << line);
	344	if (type & IRQT_HIGH)
	345	GPIO_IRQ_level_high \|= 1 << line;
	346	else
	347	GPIO_IRQ_level_high &= ~(1 << line);
	348	update_gpio_int_csrs();
	349
c4982887 LB	350	return 0;
	351	}
	352
1da177e4 LT	353	static void ixp2000_GPIO_irq_mask_ack(unsigned int irq)
	354	{
	355	ixp2000_reg_write(IXP2000_GPIO_INCR, (1 << (irq - IRQ_IXP2000_GPIO0)));
c4982887 LB	356
	357	ixp2000_reg_write(IXP2000_GPIO_EDSR, (1 << (irq - IRQ_IXP2000_GPIO0)));
	358	ixp2000_reg_write(IXP2000_GPIO_LDSR, (1 << (irq - IRQ_IXP2000_GPIO0)));
e9b72e43	359	ixp2000_reg_wrb(IXP2000_GPIO_INST, (1 << (irq - IRQ_IXP2000_GPIO0)));
1da177e4 LT	360	}
	361
	362	static void ixp2000_GPIO_irq_mask(unsigned int irq)
	363	{
e9b72e43	364	ixp2000_reg_wrb(IXP2000_GPIO_INCR, (1 << (irq - IRQ_IXP2000_GPIO0)));
1da177e4 LT	365	}
	366
	367	static void ixp2000_GPIO_irq_unmask(unsigned int irq)
	368	{
	369	ixp2000_reg_write(IXP2000_GPIO_INSR, (1 << (irq - IRQ_IXP2000_GPIO0)));
	370	}
	371
10dd5ce2	372	static struct irq_chip ixp2000_GPIO_irq_chip = {
7801907b RK	373	.ack = ixp2000_GPIO_irq_mask_ack,
7801907b RK	374	.mask = ixp2000_GPIO_irq_mask,
2be863c9	375	.unmask = ixp2000_GPIO_irq_unmask,
7801907b	376	.set_type = ixp2000_GPIO_irq_type,
1da177e4 LT	377	};
	378
	379	static void ixp2000_pci_irq_mask(unsigned int irq)
	380	{
	381	unsigned long temp = *IXP2000_PCI_XSCALE_INT_ENABLE;
	382	if (irq == IRQ_IXP2000_PCIA)
e9b72e43	383	ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, (temp & ~(1 << 26)));
1da177e4	384	else if (irq == IRQ_IXP2000_PCIB)
e9b72e43	385	ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, (temp & ~(1 << 27)));
1da177e4 LT	386	}
	387
	388	static void ixp2000_pci_irq_unmask(unsigned int irq)
	389	{
	390	unsigned long temp = *IXP2000_PCI_XSCALE_INT_ENABLE;
	391	if (irq == IRQ_IXP2000_PCIA)
	392	ixp2000_reg_write(IXP2000_PCI_XSCALE_INT_ENABLE, (temp \| (1 << 26)));
	393	else if (irq == IRQ_IXP2000_PCIB)
	394	ixp2000_reg_write(IXP2000_PCI_XSCALE_INT_ENABLE, (temp \| (1 << 27)));
	395	}
	396
7866f649 DJ	397	/*
	398	* Error interrupts. These are used extensively by the microengine drivers
	399	*/
10dd5ce2	400	static void ixp2000_err_irq_handler(unsigned int irq, struct irq_desc *desc)
7866f649 DJ	401	{
	402	int i;
	403	unsigned long status = *IXP2000_IRQ_ERR_STATUS;
	404
	405	for(i = 31; i >= 0; i--) {
	406	if(status & (1 << i)) {
	407	desc = irq_desc + IRQ_IXP2000_DRAM0_MIN_ERR + i;
0cd61b68	408	desc_handle_irq(IRQ_IXP2000_DRAM0_MIN_ERR + i, desc);
7866f649 DJ	409	}
	410	}
	411	}
	412
	413	static void ixp2000_err_irq_mask(unsigned int irq)
	414	{
	415	ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_CLR,
	416	(1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)));
	417	}
	418
	419	static void ixp2000_err_irq_unmask(unsigned int irq)
	420	{
	421	ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_SET,
	422	(1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)));
	423	}
	424
10dd5ce2	425	static struct irq_chip ixp2000_err_irq_chip = {
7866f649 DJ	426	.ack = ixp2000_err_irq_mask,
	427	.mask = ixp2000_err_irq_mask,
	428	.unmask = ixp2000_err_irq_unmask
	429	};
	430
10dd5ce2	431	static struct irq_chip ixp2000_pci_irq_chip = {
1da177e4 LT	432	.ack = ixp2000_pci_irq_mask,
	433	.mask = ixp2000_pci_irq_mask,
	434	.unmask = ixp2000_pci_irq_unmask
	435	};
	436
	437	static void ixp2000_irq_mask(unsigned int irq)
	438	{
e9b72e43	439	ixp2000_reg_wrb(IXP2000_IRQ_ENABLE_CLR, (1 << irq));
1da177e4 LT	440	}
	441
	442	static void ixp2000_irq_unmask(unsigned int irq)
	443	{
c4982887	444	ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET, (1 << irq));
1da177e4 LT	445	}
1da177e4 LT	446
10dd5ce2	447	static struct irq_chip ixp2000_irq_chip = {
1da177e4 LT	448	.ack = ixp2000_irq_mask,
	449	.mask = ixp2000_irq_mask,
	450	.unmask = ixp2000_irq_unmask
	451	};
	452
	453	void __init ixp2000_init_irq(void)
	454	{
	455	int irq;
	456
	457	/*
	458	* Mask all sources
	459	*/
	460	ixp2000_reg_write(IXP2000_IRQ_ENABLE_CLR, 0xffffffff);
	461	ixp2000_reg_write(IXP2000_FIQ_ENABLE_CLR, 0xffffffff);
	462
	463	/* clear all GPIO edge/level detects */
	464	ixp2000_reg_write(IXP2000_GPIO_REDR, 0);
	465	ixp2000_reg_write(IXP2000_GPIO_FEDR, 0);
	466	ixp2000_reg_write(IXP2000_GPIO_LSHR, 0);
	467	ixp2000_reg_write(IXP2000_GPIO_LSLR, 0);
	468	ixp2000_reg_write(IXP2000_GPIO_INCR, -1);
	469
	470	/* clear PCI interrupt sources */
e9b72e43	471	ixp2000_reg_wrb(IXP2000_PCI_XSCALE_INT_ENABLE, 0);
1da177e4 LT	472
	473	/*
	474	* Certain bits in the IRQ status register of the
	475	* IXP2000 are reserved. Instead of trying to map
	476	* things non 1:1 from bit position to IRQ number,
	477	* we mark the reserved IRQs as invalid. This makes
	478	* our mask/unmask code much simpler.
	479	*/
	480	for (irq = IRQ_IXP2000_SOFT_INT; irq <= IRQ_IXP2000_THDB3; irq++) {
c4982887	481	if ((1 << irq) & IXP2000_VALID_IRQ_MASK) {
1da177e4	482	set_irq_chip(irq, &ixp2000_irq_chip);
10dd5ce2	483	set_irq_handler(irq, handle_level_irq);
1da177e4 LT	484	set_irq_flags(irq, IRQF_VALID);
	485	} else set_irq_flags(irq, 0);
	486	}
c4982887	487
7866f649 DJ	488	for (irq = IRQ_IXP2000_DRAM0_MIN_ERR; irq <= IRQ_IXP2000_SP_INT; irq++) {
	489	if((1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)) &
	490	IXP2000_VALID_ERR_IRQ_MASK) {
	491	set_irq_chip(irq, &ixp2000_err_irq_chip);
10dd5ce2	492	set_irq_handler(irq, handle_level_irq);
7866f649 DJ	493	set_irq_flags(irq, IRQF_VALID);
	494	}
	495	else
	496	set_irq_flags(irq, 0);
	497	}
	498	set_irq_chained_handler(IRQ_IXP2000_ERRSUM, ixp2000_err_irq_handler);
	499
1da177e4 LT	500	for (irq = IRQ_IXP2000_GPIO0; irq <= IRQ_IXP2000_GPIO7; irq++) {
1da177e4 LT	501	set_irq_chip(irq, &ixp2000_GPIO_irq_chip);
10dd5ce2	502	set_irq_handler(irq, handle_level_irq);
bd115ea0	503	set_irq_flags(irq, IRQF_VALID);
1da177e4 LT	504	}
	505	set_irq_chained_handler(IRQ_IXP2000_GPIO, ixp2000_GPIO_irq_handler);
	506
	507	/*
	508	* Enable PCI irqs. The actual PCI[AB] decoding is done in
	509	* entry-macro.S, so we don't need a chained handler for the
	510	* PCI interrupt source.
	511	*/
	512	ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET, (1 << IRQ_IXP2000_PCI));
	513	for (irq = IRQ_IXP2000_PCIA; irq <= IRQ_IXP2000_PCIB; irq++) {
	514	set_irq_chip(irq, &ixp2000_pci_irq_chip);
10dd5ce2	515	set_irq_handler(irq, handle_level_irq);
1da177e4 LT	516	set_irq_flags(irq, IRQF_VALID);
	517	}
	518	}
	519