arch/mips/alchemy/common/irq.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright 2001, 2007-2008 MontaVista Software Inc.
  * Author: MontaVista Software, Inc. <source@mvista.com>
  *
  * Copyright (C) 2007 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.
  *
  *  THIS  SOFTWARE  IS PROVIDED	  ``AS	IS'' AND   ANY	EXPRESS OR IMPLIED
  *  WARRANTIES,	  INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  *  NO	EVENT  SHALL   THE AUTHOR  BE	 LIABLE FOR ANY	  DIRECT, INDIRECT,
  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  *  NOT LIMITED	  TO, PROCUREMENT OF  SUBSTITUTE GOODS	OR SERVICES; LOSS OF
  *  USE, DATA,	OR PROFITS; OR	BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  *  ANY THEORY OF LIABILITY, WHETHER IN	 CONTRACT, STRICT LIABILITY, OR TORT
  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  *  You should have received a copy of the  GNU General Public License along
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include <linux/bitops.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>

 #include <asm/irq_cpu.h>
 #include <asm/mipsregs.h>
 #include <asm/mach-au1x00/au1000.h>
 #ifdef CONFIG_MIPS_PB1000
 #include <asm/mach-pb1x00/pb1000.h>
 #endif

 static int au1x_ic_settype(unsigned int irq, unsigned int flow_type);

 /* per-processor fixed function irqs */
 struct au1xxx_irqmap au1xxx_ic0_map[] __initdata = {

 #if defined(CONFIG_SOC_AU1000)
 	{ AU1000_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_UART2_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },

 #elif defined(CONFIG_SOC_AU1500)

 	{ AU1500_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1000_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1500_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1000_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1500_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1500_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },

 #elif defined(CONFIG_SOC_AU1100)

 	{ AU1100_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1100_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1100_SD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1100_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1100_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1100_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },

 #elif defined(CONFIG_SOC_AU1550)

 	{ AU1550_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1550_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1550_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_CRYPTO_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1550_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1550_PCI_RST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1550_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_PSC2_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_PSC3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1550_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1550_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1550_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
 	{ AU1550_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1550_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },

 #elif defined(CONFIG_SOC_AU1200)

 	{ AU1200_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_SWT_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1200_SD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_MAE_BE_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_MAE_FE_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_AES_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_CAMERA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
 	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1200_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
 	{ AU1200_USB_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
 	{ AU1200_MAE_BOTH_INT, IRQ_TYPE_LEVEL_HIGH, 0 },

 #else
 #error "Error: Unknown Alchemy SOC"
 #endif
 };


 #ifdef CONFIG_PM

 /*
  * Save/restore the interrupt controller state.
  * Called from the save/restore core registers as part of the
  * au_sleep function in power.c.....maybe I should just pm_register()
  * them instead?
  */
 static unsigned int	sleep_intctl_config0[2];
 static unsigned int	sleep_intctl_config1[2];
 static unsigned int	sleep_intctl_config2[2];
 static unsigned int	sleep_intctl_src[2];
 static unsigned int	sleep_intctl_assign[2];
 static unsigned int	sleep_intctl_wake[2];
 static unsigned int	sleep_intctl_mask[2];

 void save_au1xxx_intctl(void)
 {
 	sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
 	sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
 	sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
 	sleep_intctl_src[0] = au_readl(IC0_SRCRD);
 	sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
 	sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
 	sleep_intctl_mask[0] = au_readl(IC0_MASKRD);

 	sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
 	sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
 	sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
 	sleep_intctl_src[1] = au_readl(IC1_SRCRD);
 	sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
 	sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
 	sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
 }

 /*
  * For most restore operations, we clear the entire register and
  * then set the bits we found during the save.
  */
 void restore_au1xxx_intctl(void)
 {
 	au_writel(0xffffffff, IC0_MASKCLR); au_sync();

 	au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
 	au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
 	au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
 	au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
 	au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
 	au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
 	au_writel(0xffffffff, IC0_SRCCLR); au_sync();
 	au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
 	au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
 	au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
 	au_writel(0xffffffff, IC0_WAKECLR); au_sync();
 	au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
 	au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
 	au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
 	au_writel(0x00000000, IC0_TESTBIT); au_sync();

 	au_writel(0xffffffff, IC1_MASKCLR); au_sync();

 	au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
 	au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
 	au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
 	au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
 	au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
 	au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
 	au_writel(0xffffffff, IC1_SRCCLR); au_sync();
 	au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
 	au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
 	au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
 	au_writel(0xffffffff, IC1_WAKECLR); au_sync();
 	au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
 	au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
 	au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
 	au_writel(0x00000000, IC1_TESTBIT); au_sync();

 	au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();

 	au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
 }
 #endif /* CONFIG_PM */


 static void au1x_ic0_unmask(unsigned int irq_nr)
 {
 	unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
 	au_writel(1 << bit, IC0_MASKSET);
 	au_writel(1 << bit, IC0_WAKESET);
 	au_sync();
 }

 static void au1x_ic1_unmask(unsigned int irq_nr)
 {
 	unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;
 	au_writel(1 << bit, IC1_MASKSET);
 	au_writel(1 << bit, IC1_WAKESET);

 /* very hacky. does the pb1000 cpld auto-disable this int?
  * nowhere in the current kernel sources is it disabled.	--mlau
  */
 #if defined(CONFIG_MIPS_PB1000)
 	if (irq_nr == AU1000_GPIO_15)
 		au_writel(0x4000, PB1000_MDR); /* enable int */
 #endif
 	au_sync();
 }

 static void au1x_ic0_mask(unsigned int irq_nr)
 {
 	unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
 	au_writel(1 << bit, IC0_MASKCLR);
 	au_writel(1 << bit, IC0_WAKECLR);
 	au_sync();
 }

 static void au1x_ic1_mask(unsigned int irq_nr)
 {
 	unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;
 	au_writel(1 << bit, IC1_MASKCLR);
 	au_writel(1 << bit, IC1_WAKECLR);
 	au_sync();
 }

 static void au1x_ic0_ack(unsigned int irq_nr)
 {
 	unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;

 	/*
 	 * This may assume that we don't get interrupts from
 	 * both edges at once, or if we do, that we don't care.
 	 */
 	au_writel(1 << bit, IC0_FALLINGCLR);
 	au_writel(1 << bit, IC0_RISINGCLR);
 	au_sync();
 }

 static void au1x_ic1_ack(unsigned int irq_nr)
 {
 	unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;

 	/*
 	 * This may assume that we don't get interrupts from
 	 * both edges at once, or if we do, that we don't care.
 	 */
 	au_writel(1 << bit, IC1_FALLINGCLR);
 	au_writel(1 << bit, IC1_RISINGCLR);
 	au_sync();
 }

 static int au1x_ic1_setwake(unsigned int irq, unsigned int on)
 {
 	unsigned int bit = irq - AU1000_INTC1_INT_BASE;
 	unsigned long wakemsk, flags;

 	/* only GPIO 0-7 can act as wakeup source: */
 	if ((irq < AU1000_GPIO_0) || (irq > AU1000_GPIO_7))
 		return -EINVAL;

 	local_irq_save(flags);
 	wakemsk = au_readl(SYS_WAKEMSK);
 	if (on)
 		wakemsk |= 1 << bit;
 	else
 		wakemsk &= ~(1 << bit);
 	au_writel(wakemsk, SYS_WAKEMSK);
 	au_sync();
 	local_irq_restore(flags);

 	return 0;
 }

 /*
  * irq_chips for both ICs; this way the mask handlers can be
  * as short as possible.
  *
  * NOTE: the ->ack() callback is used by the handle_edge_irq
  *	 flowhandler only, the ->mask_ack() one by handle_level_irq,
  *	 so no need for an irq_chip for each type of irq (level/edge).
  */
 static struct irq_chip au1x_ic0_chip = {
 	.name		= "Alchemy-IC0",
 	.ack		= au1x_ic0_ack,		/* edge */
 	.mask		= au1x_ic0_mask,
 	.mask_ack	= au1x_ic0_mask,	/* level */
 	.unmask		= au1x_ic0_unmask,
 	.set_type	= au1x_ic_settype,
 };

 static struct irq_chip au1x_ic1_chip = {
 	.name		= "Alchemy-IC1",
 	.ack		= au1x_ic1_ack,		/* edge */
 	.mask		= au1x_ic1_mask,
 	.mask_ack	= au1x_ic1_mask,	/* level */
 	.unmask		= au1x_ic1_unmask,
 	.set_type	= au1x_ic_settype,
 	.set_wake	= au1x_ic1_setwake,
 };

 static int au1x_ic_settype(unsigned int irq, unsigned int flow_type)
 {
 	struct irq_chip *chip;
 	unsigned long icr[6];
 	unsigned int bit, ic;
 	int ret;

 	if (irq >= AU1000_INTC1_INT_BASE) {
 		bit = irq - AU1000_INTC1_INT_BASE;
 		chip = &au1x_ic1_chip;
 		ic = 1;
 	} else {
 		bit = irq - AU1000_INTC0_INT_BASE;
 		chip = &au1x_ic0_chip;
 		ic = 0;
 	}

 	if (bit > 31)
 		return -EINVAL;

 	icr[0] = ic ? IC1_CFG0SET : IC0_CFG0SET;
 	icr[1] = ic ? IC1_CFG1SET : IC0_CFG1SET;
 	icr[2] = ic ? IC1_CFG2SET : IC0_CFG2SET;
 	icr[3] = ic ? IC1_CFG0CLR : IC0_CFG0CLR;
 	icr[4] = ic ? IC1_CFG1CLR : IC0_CFG1CLR;
 	icr[5] = ic ? IC1_CFG2CLR : IC0_CFG2CLR;

 	ret = 0;

 	switch (flow_type) {	/* cfgregs 2:1:0 */
 	case IRQ_TYPE_EDGE_RISING:	/* 0:0:1 */
 		au_writel(1 << bit, icr[5]);
 		au_writel(1 << bit, icr[4]);
 		au_writel(1 << bit, icr[0]);
 		set_irq_chip_and_handler_name(irq, chip,
 				handle_edge_irq, "riseedge");
 		break;
 	case IRQ_TYPE_EDGE_FALLING:	/* 0:1:0 */
 		au_writel(1 << bit, icr[5]);
 		au_writel(1 << bit, icr[1]);
 		au_writel(1 << bit, icr[3]);
 		set_irq_chip_and_handler_name(irq, chip,
 				handle_edge_irq, "falledge");
 		break;
 	case IRQ_TYPE_EDGE_BOTH:	/* 0:1:1 */
 		au_writel(1 << bit, icr[5]);
 		au_writel(1 << bit, icr[1]);
 		au_writel(1 << bit, icr[0]);
 		set_irq_chip_and_handler_name(irq, chip,
 				handle_edge_irq, "bothedge");
 		break;
 	case IRQ_TYPE_LEVEL_HIGH:	/* 1:0:1 */
 		au_writel(1 << bit, icr[2]);
 		au_writel(1 << bit, icr[4]);
 		au_writel(1 << bit, icr[0]);
 		set_irq_chip_and_handler_name(irq, chip,
 				handle_level_irq, "hilevel");
 		break;
 	case IRQ_TYPE_LEVEL_LOW:	/* 1:1:0 */
 		au_writel(1 << bit, icr[2]);
 		au_writel(1 << bit, icr[1]);
 		au_writel(1 << bit, icr[3]);
 		set_irq_chip_and_handler_name(irq, chip,
 				handle_level_irq, "lowlevel");
 		break;
 	case IRQ_TYPE_NONE:		/* 0:0:0 */
 		au_writel(1 << bit, icr[5]);
 		au_writel(1 << bit, icr[4]);
 		au_writel(1 << bit, icr[3]);
 		/* set at least chip so we can call set_irq_type() on it */
 		set_irq_chip(irq, chip);
 		break;
 	default:
 		ret = -EINVAL;
 	}
 	au_sync();

 	return ret;
 }

 asmlinkage void plat_irq_dispatch(void)
 {
 	unsigned int pending = read_c0_status() & read_c0_cause();
 	unsigned long s, off, bit;

 	if (pending & CAUSEF_IP7) {
 		do_IRQ(MIPS_CPU_IRQ_BASE + 7);
 		return;
 	} else if (pending & CAUSEF_IP2) {
 		s = IC0_REQ0INT;
 		off = AU1000_INTC0_INT_BASE;
 	} else if (pending & CAUSEF_IP3) {
 		s = IC0_REQ1INT;
 		off = AU1000_INTC0_INT_BASE;
 	} else if (pending & CAUSEF_IP4) {
 		s = IC1_REQ0INT;
 		off = AU1000_INTC1_INT_BASE;
 	} else if (pending & CAUSEF_IP5) {
 		s = IC1_REQ1INT;
 		off = AU1000_INTC1_INT_BASE;
 	} else
 		goto spurious;

 	bit = 0;
 	s = au_readl(s);
 	if (unlikely(!s)) {
 spurious:
 		spurious_interrupt();
 		return;
 	}
 #ifdef AU1000_USB_DEV_REQ_INT
 	/*
 	 * Because of the tight timing of SETUP token to reply
 	 * transactions, the USB devices-side packet complete
 	 * interrupt needs the highest priority.
 	 */
 	bit = 1 << (AU1000_USB_DEV_REQ_INT - AU1000_INTC0_INT_BASE);
 	if ((pending & CAUSEF_IP2) && (s & bit)) {
 		do_IRQ(AU1000_USB_DEV_REQ_INT);
 		return;
 	}
 #endif
 	do_IRQ(__ffs(s) + off);
 }

 /* setup edge/level and assign request 0/1 */
 void __init au1xxx_setup_irqmap(struct au1xxx_irqmap *map, int count)
 {
 	unsigned int bit, irq_nr;

 	while (count--) {
 		irq_nr = map[count].im_irq;

 		if (((irq_nr < AU1000_INTC0_INT_BASE) ||
 		     (irq_nr >= AU1000_INTC0_INT_BASE + 32)) &&
 		    ((irq_nr < AU1000_INTC1_INT_BASE) ||
 		     (irq_nr >= AU1000_INTC1_INT_BASE + 32)))
 			continue;

 		if (irq_nr >= AU1000_INTC1_INT_BASE) {
 			bit = irq_nr - AU1000_INTC1_INT_BASE;
 			if (map[count].im_request)
 				au_writel(1 << bit, IC1_ASSIGNCLR);
 		} else {
 			bit = irq_nr - AU1000_INTC0_INT_BASE;
 			if (map[count].im_request)
 				au_writel(1 << bit, IC0_ASSIGNCLR);
 		}

 		au1x_ic_settype(irq_nr, map[count].im_type);
 	}
 }

 void __init arch_init_irq(void)
 {
 	int i;

 	/*
 	 * Initialize interrupt controllers to a safe state.
 	 */
 	au_writel(0xffffffff, IC0_CFG0CLR);
 	au_writel(0xffffffff, IC0_CFG1CLR);
 	au_writel(0xffffffff, IC0_CFG2CLR);
 	au_writel(0xffffffff, IC0_MASKCLR);
 	au_writel(0xffffffff, IC0_ASSIGNSET);
 	au_writel(0xffffffff, IC0_WAKECLR);
 	au_writel(0xffffffff, IC0_SRCSET);
 	au_writel(0xffffffff, IC0_FALLINGCLR);
 	au_writel(0xffffffff, IC0_RISINGCLR);
 	au_writel(0x00000000, IC0_TESTBIT);

 	au_writel(0xffffffff, IC1_CFG0CLR);
 	au_writel(0xffffffff, IC1_CFG1CLR);
 	au_writel(0xffffffff, IC1_CFG2CLR);
 	au_writel(0xffffffff, IC1_MASKCLR);
 	au_writel(0xffffffff, IC1_ASSIGNSET);
 	au_writel(0xffffffff, IC1_WAKECLR);
 	au_writel(0xffffffff, IC1_SRCSET);
 	au_writel(0xffffffff, IC1_FALLINGCLR);
 	au_writel(0xffffffff, IC1_RISINGCLR);
 	au_writel(0x00000000, IC1_TESTBIT);

 	mips_cpu_irq_init();

 	/* register all 64 possible IC0+IC1 irq sources as type "none".
 	 * Use set_irq_type() to set edge/level behaviour at runtime.
 	 */
 	for (i = AU1000_INTC0_INT_BASE;
 	     (i < AU1000_INTC0_INT_BASE + 32); i++)
 		au1x_ic_settype(i, IRQ_TYPE_NONE);

 	for (i = AU1000_INTC1_INT_BASE;
 	     (i < AU1000_INTC1_INT_BASE + 32); i++)
 		au1x_ic_settype(i, IRQ_TYPE_NONE);

 	/*
 	 * Initialize IC0, which is fixed per processor.
 	 */
 	au1xxx_setup_irqmap(au1xxx_ic0_map, ARRAY_SIZE(au1xxx_ic0_map));

 	/* Boards can register additional (GPIO-based) IRQs.
 	*/
 	board_init_irq();

 	set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3);
 }
	/*
	* Copyright 2001, 2007-2008 MontaVista Software Inc.
	* Author: MontaVista Software, Inc. <source@mvista.com>
	*
	* Copyright (C) 2007 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.
	*
	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <linux/bitops.h>
	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/irq.h>

	#include <asm/irq_cpu.h>
	#include <asm/mipsregs.h>
	#include <asm/mach-au1x00/au1000.h>
	#ifdef CONFIG_MIPS_PB1000
	#include <asm/mach-pb1x00/pb1000.h>
	#endif

	static int au1x_ic_settype(unsigned int irq, unsigned int flow_type);

	/* per-processor fixed function irqs */
	struct au1xxx_irqmap au1xxx_ic0_map[] __initdata = {

	#if defined(CONFIG_SOC_AU1000)
	{ AU1000_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_UART2_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },

	#elif defined(CONFIG_SOC_AU1500)

	{ AU1500_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1000_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1500_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1000_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1500_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1500_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },

	#elif defined(CONFIG_SOC_AU1100)

	{ AU1100_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1100_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1100_SD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1100_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1100_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1100_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },

	#elif defined(CONFIG_SOC_AU1550)

	{ AU1550_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1550_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1550_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_CRYPTO_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1550_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1550_PCI_RST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1550_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_PSC2_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_PSC3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1550_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1550_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1550_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
	{ AU1550_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1550_MAC1_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },

	#elif defined(CONFIG_SOC_AU1200)

	{ AU1200_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_SWT_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1200_SD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_DDMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_MAE_BE_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_UART1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_MAE_FE_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_PSC0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_PSC1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_AES_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_CAMERA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
	{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1200_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
	{ AU1200_USB_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
	{ AU1200_MAE_BOTH_INT, IRQ_TYPE_LEVEL_HIGH, 0 },

	#else
	#error "Error: Unknown Alchemy SOC"
	#endif
	};


	#ifdef CONFIG_PM

	/*
	* Save/restore the interrupt controller state.
	* Called from the save/restore core registers as part of the
	* au_sleep function in power.c.....maybe I should just pm_register()
	* them instead?
	*/
	static unsigned int sleep_intctl_config0[2];
	static unsigned int sleep_intctl_config1[2];
	static unsigned int sleep_intctl_config2[2];
	static unsigned int sleep_intctl_src[2];
	static unsigned int sleep_intctl_assign[2];
	static unsigned int sleep_intctl_wake[2];
	static unsigned int sleep_intctl_mask[2];

	void save_au1xxx_intctl(void)
	{
	sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
	sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
	sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
	sleep_intctl_src[0] = au_readl(IC0_SRCRD);
	sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
	sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
	sleep_intctl_mask[0] = au_readl(IC0_MASKRD);

	sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
	sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
	sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
	sleep_intctl_src[1] = au_readl(IC1_SRCRD);
	sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
	sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
	sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
	}

	/*
	* For most restore operations, we clear the entire register and
	* then set the bits we found during the save.
	*/
	void restore_au1xxx_intctl(void)
	{
	au_writel(0xffffffff, IC0_MASKCLR); au_sync();

	au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
	au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
	au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
	au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
	au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
	au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
	au_writel(0xffffffff, IC0_SRCCLR); au_sync();
	au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
	au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
	au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
	au_writel(0xffffffff, IC0_WAKECLR); au_sync();
	au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
	au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
	au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
	au_writel(0x00000000, IC0_TESTBIT); au_sync();

	au_writel(0xffffffff, IC1_MASKCLR); au_sync();

	au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
	au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
	au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
	au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
	au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
	au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
	au_writel(0xffffffff, IC1_SRCCLR); au_sync();
	au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
	au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
	au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
	au_writel(0xffffffff, IC1_WAKECLR); au_sync();
	au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
	au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
	au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
	au_writel(0x00000000, IC1_TESTBIT); au_sync();

	au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();

	au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
	}
	#endif /* CONFIG_PM */


	static void au1x_ic0_unmask(unsigned int irq_nr)
	{
	unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
	au_writel(1 << bit, IC0_MASKSET);
	au_writel(1 << bit, IC0_WAKESET);
	au_sync();
	}

	static void au1x_ic1_unmask(unsigned int irq_nr)
	{
	unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;
	au_writel(1 << bit, IC1_MASKSET);
	au_writel(1 << bit, IC1_WAKESET);

	/* very hacky. does the pb1000 cpld auto-disable this int?
	* nowhere in the current kernel sources is it disabled. --mlau
	*/
	#if defined(CONFIG_MIPS_PB1000)
	if (irq_nr == AU1000_GPIO_15)
	au_writel(0x4000, PB1000_MDR); /* enable int */
	#endif
	au_sync();
	}

	static void au1x_ic0_mask(unsigned int irq_nr)
	{
	unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
	au_writel(1 << bit, IC0_MASKCLR);
	au_writel(1 << bit, IC0_WAKECLR);
	au_sync();
	}

	static void au1x_ic1_mask(unsigned int irq_nr)
	{
	unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;
	au_writel(1 << bit, IC1_MASKCLR);
	au_writel(1 << bit, IC1_WAKECLR);
	au_sync();
	}

	static void au1x_ic0_ack(unsigned int irq_nr)
	{
	unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;

	/*
	* This may assume that we don't get interrupts from
	* both edges at once, or if we do, that we don't care.
	*/
	au_writel(1 << bit, IC0_FALLINGCLR);
	au_writel(1 << bit, IC0_RISINGCLR);
	au_sync();
	}

	static void au1x_ic1_ack(unsigned int irq_nr)
	{
	unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE;

	/*
	* This may assume that we don't get interrupts from
	* both edges at once, or if we do, that we don't care.
	*/
	au_writel(1 << bit, IC1_FALLINGCLR);
	au_writel(1 << bit, IC1_RISINGCLR);
	au_sync();
	}

	static int au1x_ic1_setwake(unsigned int irq, unsigned int on)
	{
	unsigned int bit = irq - AU1000_INTC1_INT_BASE;
	unsigned long wakemsk, flags;

	/* only GPIO 0-7 can act as wakeup source: */
	if ((irq < AU1000_GPIO_0) \|\| (irq > AU1000_GPIO_7))
	return -EINVAL;

	local_irq_save(flags);
	wakemsk = au_readl(SYS_WAKEMSK);
	if (on)
	wakemsk \|= 1 << bit;
	else
	wakemsk &= ~(1 << bit);
	au_writel(wakemsk, SYS_WAKEMSK);
	au_sync();
	local_irq_restore(flags);

	return 0;
	}

	/*
	* irq_chips for both ICs; this way the mask handlers can be
	* as short as possible.
	*
	* NOTE: the ->ack() callback is used by the handle_edge_irq
	* flowhandler only, the ->mask_ack() one by handle_level_irq,
	* so no need for an irq_chip for each type of irq (level/edge).
	*/
	static struct irq_chip au1x_ic0_chip = {
	.name = "Alchemy-IC0",
	.ack = au1x_ic0_ack, /* edge */
	.mask = au1x_ic0_mask,
	.mask_ack = au1x_ic0_mask, /* level */
	.unmask = au1x_ic0_unmask,
	.set_type = au1x_ic_settype,
	};

	static struct irq_chip au1x_ic1_chip = {
	.name = "Alchemy-IC1",
	.ack = au1x_ic1_ack, /* edge */
	.mask = au1x_ic1_mask,
	.mask_ack = au1x_ic1_mask, /* level */
	.unmask = au1x_ic1_unmask,
	.set_type = au1x_ic_settype,
	.set_wake = au1x_ic1_setwake,
	};

	static int au1x_ic_settype(unsigned int irq, unsigned int flow_type)
	{
	struct irq_chip *chip;
	unsigned long icr[6];
	unsigned int bit, ic;
	int ret;

	if (irq >= AU1000_INTC1_INT_BASE) {
	bit = irq - AU1000_INTC1_INT_BASE;
	chip = &au1x_ic1_chip;
	ic = 1;
	} else {
	bit = irq - AU1000_INTC0_INT_BASE;
	chip = &au1x_ic0_chip;
	ic = 0;
	}

	if (bit > 31)
	return -EINVAL;

	icr[0] = ic ? IC1_CFG0SET : IC0_CFG0SET;
	icr[1] = ic ? IC1_CFG1SET : IC0_CFG1SET;
	icr[2] = ic ? IC1_CFG2SET : IC0_CFG2SET;
	icr[3] = ic ? IC1_CFG0CLR : IC0_CFG0CLR;
	icr[4] = ic ? IC1_CFG1CLR : IC0_CFG1CLR;
	icr[5] = ic ? IC1_CFG2CLR : IC0_CFG2CLR;

	ret = 0;

	switch (flow_type) { /* cfgregs 2:1:0 */
	case IRQ_TYPE_EDGE_RISING: /* 0:0:1 */
	au_writel(1 << bit, icr[5]);
	au_writel(1 << bit, icr[4]);
	au_writel(1 << bit, icr[0]);
	set_irq_chip_and_handler_name(irq, chip,
	handle_edge_irq, "riseedge");
	break;
	case IRQ_TYPE_EDGE_FALLING: /* 0:1:0 */
	au_writel(1 << bit, icr[5]);
	au_writel(1 << bit, icr[1]);
	au_writel(1 << bit, icr[3]);
	set_irq_chip_and_handler_name(irq, chip,
	handle_edge_irq, "falledge");
	break;
	case IRQ_TYPE_EDGE_BOTH: /* 0:1:1 */
	au_writel(1 << bit, icr[5]);
	au_writel(1 << bit, icr[1]);
	au_writel(1 << bit, icr[0]);
	set_irq_chip_and_handler_name(irq, chip,
	handle_edge_irq, "bothedge");
	break;
	case IRQ_TYPE_LEVEL_HIGH: /* 1:0:1 */
	au_writel(1 << bit, icr[2]);
	au_writel(1 << bit, icr[4]);
	au_writel(1 << bit, icr[0]);
	set_irq_chip_and_handler_name(irq, chip,
	handle_level_irq, "hilevel");
	break;
	case IRQ_TYPE_LEVEL_LOW: /* 1:1:0 */
	au_writel(1 << bit, icr[2]);
	au_writel(1 << bit, icr[1]);
	au_writel(1 << bit, icr[3]);
	set_irq_chip_and_handler_name(irq, chip,
	handle_level_irq, "lowlevel");
	break;
	case IRQ_TYPE_NONE: /* 0:0:0 */
	au_writel(1 << bit, icr[5]);
	au_writel(1 << bit, icr[4]);
	au_writel(1 << bit, icr[3]);
	/* set at least chip so we can call set_irq_type() on it */
	set_irq_chip(irq, chip);
	break;
	default:
	ret = -EINVAL;
	}
	au_sync();

	return ret;
	}

	asmlinkage void plat_irq_dispatch(void)
	{
	unsigned int pending = read_c0_status() & read_c0_cause();
	unsigned long s, off, bit;

	if (pending & CAUSEF_IP7) {
	do_IRQ(MIPS_CPU_IRQ_BASE + 7);
	return;
	} else if (pending & CAUSEF_IP2) {
	s = IC0_REQ0INT;
	off = AU1000_INTC0_INT_BASE;
	} else if (pending & CAUSEF_IP3) {
	s = IC0_REQ1INT;
	off = AU1000_INTC0_INT_BASE;
	} else if (pending & CAUSEF_IP4) {
	s = IC1_REQ0INT;
	off = AU1000_INTC1_INT_BASE;
	} else if (pending & CAUSEF_IP5) {
	s = IC1_REQ1INT;
	off = AU1000_INTC1_INT_BASE;
	} else
	goto spurious;

	bit = 0;
	s = au_readl(s);
	if (unlikely(!s)) {
	spurious:
	spurious_interrupt();
	return;
	}
	#ifdef AU1000_USB_DEV_REQ_INT
	/*
	* Because of the tight timing of SETUP token to reply
	* transactions, the USB devices-side packet complete
	* interrupt needs the highest priority.
	*/
	bit = 1 << (AU1000_USB_DEV_REQ_INT - AU1000_INTC0_INT_BASE);
	if ((pending & CAUSEF_IP2) && (s & bit)) {
	do_IRQ(AU1000_USB_DEV_REQ_INT);
	return;
	}
	#endif
	do_IRQ(__ffs(s) + off);
	}

	/* setup edge/level and assign request 0/1 */
	void __init au1xxx_setup_irqmap(struct au1xxx_irqmap *map, int count)
	{
	unsigned int bit, irq_nr;

	while (count--) {
	irq_nr = map[count].im_irq;

	if (((irq_nr < AU1000_INTC0_INT_BASE) \|\|
	(irq_nr >= AU1000_INTC0_INT_BASE + 32)) &&
	((irq_nr < AU1000_INTC1_INT_BASE) \|\|
	(irq_nr >= AU1000_INTC1_INT_BASE + 32)))
	continue;

	if (irq_nr >= AU1000_INTC1_INT_BASE) {
	bit = irq_nr - AU1000_INTC1_INT_BASE;
	if (map[count].im_request)
	au_writel(1 << bit, IC1_ASSIGNCLR);
	} else {
	bit = irq_nr - AU1000_INTC0_INT_BASE;
	if (map[count].im_request)
	au_writel(1 << bit, IC0_ASSIGNCLR);
	}

	au1x_ic_settype(irq_nr, map[count].im_type);
	}
	}

	void __init arch_init_irq(void)
	{
	int i;

	/*
	* Initialize interrupt controllers to a safe state.
	*/
	au_writel(0xffffffff, IC0_CFG0CLR);
	au_writel(0xffffffff, IC0_CFG1CLR);
	au_writel(0xffffffff, IC0_CFG2CLR);
	au_writel(0xffffffff, IC0_MASKCLR);
	au_writel(0xffffffff, IC0_ASSIGNSET);
	au_writel(0xffffffff, IC0_WAKECLR);
	au_writel(0xffffffff, IC0_SRCSET);
	au_writel(0xffffffff, IC0_FALLINGCLR);
	au_writel(0xffffffff, IC0_RISINGCLR);
	au_writel(0x00000000, IC0_TESTBIT);

	au_writel(0xffffffff, IC1_CFG0CLR);
	au_writel(0xffffffff, IC1_CFG1CLR);
	au_writel(0xffffffff, IC1_CFG2CLR);
	au_writel(0xffffffff, IC1_MASKCLR);
	au_writel(0xffffffff, IC1_ASSIGNSET);
	au_writel(0xffffffff, IC1_WAKECLR);
	au_writel(0xffffffff, IC1_SRCSET);
	au_writel(0xffffffff, IC1_FALLINGCLR);
	au_writel(0xffffffff, IC1_RISINGCLR);
	au_writel(0x00000000, IC1_TESTBIT);

	mips_cpu_irq_init();

	/* register all 64 possible IC0+IC1 irq sources as type "none".
	* Use set_irq_type() to set edge/level behaviour at runtime.
	*/
	for (i = AU1000_INTC0_INT_BASE;
	(i < AU1000_INTC0_INT_BASE + 32); i++)
	au1x_ic_settype(i, IRQ_TYPE_NONE);

	for (i = AU1000_INTC1_INT_BASE;
	(i < AU1000_INTC1_INT_BASE + 32); i++)
	au1x_ic_settype(i, IRQ_TYPE_NONE);

	/*
	* Initialize IC0, which is fixed per processor.
	*/
	au1xxx_setup_irqmap(au1xxx_ic0_map, ARRAY_SIZE(au1xxx_ic0_map));

	/* Boards can register additional (GPIO-based) IRQs.
	*/
	board_init_irq();

	set_c0_status(IE_IRQ0 \| IE_IRQ1 \| IE_IRQ2 \| IE_IRQ3);
	}