/*
* 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 <linux/slab.h>
#include <linux/syscore_ops.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
/* Interrupt Controller register offsets */
#define IC_CFG0RD 0x40
#define IC_CFG0SET 0x40
#define IC_CFG0CLR 0x44
#define IC_CFG1RD 0x48
#define IC_CFG1SET 0x48
#define IC_CFG1CLR 0x4C
#define IC_CFG2RD 0x50
#define IC_CFG2SET 0x50
#define IC_CFG2CLR 0x54
#define IC_REQ0INT 0x54
#define IC_SRCRD 0x58
#define IC_SRCSET 0x58
#define IC_SRCCLR 0x5C
#define IC_REQ1INT 0x5C
#define IC_ASSIGNRD 0x60
#define IC_ASSIGNSET 0x60
#define IC_ASSIGNCLR 0x64
#define IC_WAKERD 0x68
#define IC_WAKESET 0x68
#define IC_WAKECLR 0x6C
#define IC_MASKRD 0x70
#define IC_MASKSET 0x70
#define IC_MASKCLR 0x74
#define IC_RISINGRD 0x78
#define IC_RISINGCLR 0x78
#define IC_FALLINGRD 0x7C
#define IC_FALLINGCLR 0x7C
#define IC_TESTBIT 0x80
static int au1x_ic_settype(struct irq_data *d, unsigned int flow_type);
/* NOTE on interrupt priorities: The original writers of this code said:
*
* Because of the tight timing of SETUP token to reply transactions,
* the USB devices-side packet complete interrupt (USB_DEV_REQ_INT)
* needs the highest priority.
*/
/* per-processor fixed function irqs */
struct au1xxx_irqmap {
int im_irq;
int im_type;
int im_request; /* set 1 to get higher priority */
};
struct au1xxx_irqmap au1000_irqmap[] __initdata = {
{ 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, 0 },
{ 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, 1 },
{ 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, 1 },
{ 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 },
{ -1, },
};
struct au1xxx_irqmap au1500_irqmap[] __initdata = {
{ AU1500_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_PCI_INTA, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1500_PCI_INTB, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1500_UART3_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_PCI_INTC, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1500_PCI_INTD, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1500_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1500_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
{ AU1500_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 1 },
{ AU1500_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1500_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1500_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 },
{ AU1500_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ -1, },
};
struct au1xxx_irqmap au1100_irqmap[] __initdata = {
{ 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 },
{ AU1100_SSI0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_SSI1_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE+1, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE+2, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE+3, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE+4, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE+5, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE+6, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_DMA_INT_BASE+7, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
{ AU1100_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 1 },
{ AU1100_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1100_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1100_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_LCD_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1100_AC97C_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ -1, },
};
struct au1xxx_irqmap au1550_irqmap[] __initdata = {
{ 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 },
{ AU1550_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
{ AU1550_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 1 },
{ 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 },
{ -1, },
};
struct au1xxx_irqmap au1200_irqmap[] __initdata = {
{ 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 },
{ AU1200_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1200_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1200_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1200_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1200_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1200_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1200_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1200_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 },
{ 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 },
{ -1, },
};
static void au1x_ic0_unmask(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
__raw_writel(1 << bit, base + IC_MASKSET);
__raw_writel(1 << bit, base + IC_WAKESET);
wmb();
}
static void au1x_ic1_unmask(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
__raw_writel(1 << bit, base + IC_MASKSET);
__raw_writel(1 << bit, base + IC_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 (d->irq == AU1000_GPIO15_INT)
__raw_writel(0x4000, (void __iomem *)PB1000_MDR); /* enable int */
#endif
wmb();
}
static void au1x_ic0_mask(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
__raw_writel(1 << bit, base + IC_MASKCLR);
__raw_writel(1 << bit, base + IC_WAKECLR);
wmb();
}
static void au1x_ic1_mask(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
__raw_writel(1 << bit, base + IC_MASKCLR);
__raw_writel(1 << bit, base + IC_WAKECLR);
wmb();
}
static void au1x_ic0_ack(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
/*
* This may assume that we don't get interrupts from
* both edges at once, or if we do, that we don't care.
*/
__raw_writel(1 << bit, base + IC_FALLINGCLR);
__raw_writel(1 << bit, base + IC_RISINGCLR);
wmb();
}
static void au1x_ic1_ack(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
/*
* This may assume that we don't get interrupts from
* both edges at once, or if we do, that we don't care.
*/
__raw_writel(1 << bit, base + IC_FALLINGCLR);
__raw_writel(1 << bit, base + IC_RISINGCLR);
wmb();
}
static void au1x_ic0_maskack(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC0_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
__raw_writel(1 << bit, base + IC_WAKECLR);
__raw_writel(1 << bit, base + IC_MASKCLR);
__raw_writel(1 << bit, base + IC_RISINGCLR);
__raw_writel(1 << bit, base + IC_FALLINGCLR);
wmb();
}
static void au1x_ic1_maskack(struct irq_data *d)
{
unsigned int bit = d->irq - AU1000_INTC1_INT_BASE;
void __iomem *base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
__raw_writel(1 << bit, base + IC_WAKECLR);
__raw_writel(1 << bit, base + IC_MASKCLR);
__raw_writel(1 << bit, base + IC_RISINGCLR);
__raw_writel(1 << bit, base + IC_FALLINGCLR);
wmb();
}
static int au1x_ic1_setwake(struct irq_data *d, unsigned int on)
{
int bit = d->irq - AU1000_INTC1_INT_BASE;
unsigned long wakemsk, flags;
/* only GPIO 0-7 can act as wakeup source. Fortunately these
* are wired up identically on all supported variants.
*/
if ((bit < 0) || (bit > 7))
return -EINVAL;
local_irq_save(flags);
wakemsk = __raw_readl((void __iomem *)SYS_WAKEMSK);
if (on)
wakemsk |= 1 << bit;
else
wakemsk &= ~(1 << bit);
__raw_writel(wakemsk, (void __iomem *)SYS_WAKEMSK);
wmb();
local_irq_restore(flags);
return 0;
}
/*
* irq_chips for both ICs; this way the mask handlers can be
* as short as possible.
*/
static struct irq_chip au1x_ic0_chip = {
.name = "Alchemy-IC0",
.irq_ack = au1x_ic0_ack,
.irq_mask = au1x_ic0_mask,
.irq_mask_ack = au1x_ic0_maskack,
.irq_unmask = au1x_ic0_unmask,
.irq_set_type = au1x_ic_settype,
};
static struct irq_chip au1x_ic1_chip = {
.name = "Alchemy-IC1",
.irq_ack = au1x_ic1_ack,
.irq_mask = au1x_ic1_mask,
.irq_mask_ack = au1x_ic1_maskack,
.irq_unmask = au1x_ic1_unmask,
.irq_set_type = au1x_ic_settype,
.irq_set_wake = au1x_ic1_setwake,
};
static int au1x_ic_settype(struct irq_data *d, unsigned int flow_type)
{
struct irq_chip *chip;
unsigned int bit, irq = d->irq;
irq_flow_handler_t handler = NULL;
unsigned char *name = NULL;
void __iomem *base;
int ret;
if (irq >= AU1000_INTC1_INT_BASE) {
bit = irq - AU1000_INTC1_INT_BASE;
chip = &au1x_ic1_chip;
base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
} else {
bit = irq - AU1000_INTC0_INT_BASE;
chip = &au1x_ic0_chip;
base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
}
if (bit > 31)
return -EINVAL;
ret = 0;
switch (flow_type) { /* cfgregs 2:1:0 */
case IRQ_TYPE_EDGE_RISING: /* 0:0:1 */
__raw_writel(1 << bit, base + IC_CFG2CLR);
__raw_writel(1 << bit, base + IC_CFG1CLR);
__raw_writel(1 << bit, base + IC_CFG0SET);
handler = handle_edge_irq;
name = "riseedge";
break;
case IRQ_TYPE_EDGE_FALLING: /* 0:1:0 */
__raw_writel(1 << bit, base + IC_CFG2CLR);
__raw_writel(1 << bit, base + IC_CFG1SET);
__raw_writel(1 << bit, base + IC_CFG0CLR);
handler = handle_edge_irq;
name = "falledge";
break;
case IRQ_TYPE_EDGE_BOTH: /* 0:1:1 */
__raw_writel(1 << bit, base + IC_CFG2CLR);
__raw_writel(1 << bit, base + IC_CFG1SET);
__raw_writel(1 << bit, base + IC_CFG0SET);
handler = handle_edge_irq;
name = "bothedge";
break;
case IRQ_TYPE_LEVEL_HIGH: /* 1:0:1 */
__raw_writel(1 << bit, base + IC_CFG2SET);
__raw_writel(1 << bit, base + IC_CFG1CLR);
__raw_writel(1 << bit, base + IC_CFG0SET);
handler = handle_level_irq;
name = "hilevel";
break;
case IRQ_TYPE_LEVEL_LOW: /* 1:1:0 */
__raw_writel(1 << bit, base + IC_CFG2SET);
__raw_writel(1 << bit, base + IC_CFG1SET);
__raw_writel(1 << bit, base + IC_CFG0CLR);
handler = handle_level_irq;
name = "lowlevel";
break;
case IRQ_TYPE_NONE: /* 0:0:0 */
__raw_writel(1 << bit, base + IC_CFG2CLR);
__raw_writel(1 << bit, base + IC_CFG1CLR);
__raw_writel(1 << bit, base + IC_CFG0CLR);
break;
default:
ret = -EINVAL;
}
__irq_set_chip_handler_name_locked(d->irq, chip, handler, name);
wmb();
return ret;
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause();
unsigned long s, off;
if (pending & CAUSEF_IP7) {
off = MIPS_CPU_IRQ_BASE + 7;
goto handle;
} else if (pending & CAUSEF_IP2) {
s = KSEG1ADDR(AU1000_IC0_PHYS_ADDR) + IC_REQ0INT;
off = AU1000_INTC0_INT_BASE;
} else if (pending & CAUSEF_IP3) {
s = KSEG1ADDR(AU1000_IC0_PHYS_ADDR) + IC_REQ1INT;
off = AU1000_INTC0_INT_BASE;
} else if (pending & CAUSEF_IP4) {
s = KSEG1ADDR(AU1000_IC1_PHYS_ADDR) + IC_REQ0INT;
off = AU1000_INTC1_INT_BASE;
} else if (pending & CAUSEF_IP5) {
s = KSEG1ADDR(AU1000_IC1_PHYS_ADDR) + IC_REQ1INT;
off = AU1000_INTC1_INT_BASE;
} else
goto spurious;
s = __raw_readl((void __iomem *)s);
if (unlikely(!s)) {
spurious:
spurious_interrupt();
return;
}
off += __ffs(s);
handle:
do_IRQ(off);
}
static inline void ic_init(void __iomem *base)
{
/* initialize interrupt controller to a safe state */
__raw_writel(0xffffffff, base + IC_CFG0CLR);
__raw_writel(0xffffffff, base + IC_CFG1CLR);
__raw_writel(0xffffffff, base + IC_CFG2CLR);
__raw_writel(0xffffffff, base + IC_MASKCLR);
__raw_writel(0xffffffff, base + IC_ASSIGNCLR);
__raw_writel(0xffffffff, base + IC_WAKECLR);
__raw_writel(0xffffffff, base + IC_SRCSET);
__raw_writel(0xffffffff, base + IC_FALLINGCLR);
__raw_writel(0xffffffff, base + IC_RISINGCLR);
__raw_writel(0x00000000, base + IC_TESTBIT);
wmb();
}
static void __init au1000_init_irq(struct au1xxx_irqmap *map)
{
unsigned int bit, irq_nr;
void __iomem *base;
ic_init((void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR));
ic_init((void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR));
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 (irq_nr = AU1000_INTC0_INT_BASE;
(irq_nr < AU1000_INTC0_INT_BASE + 32); irq_nr++)
au1x_ic_settype(irq_get_irq_data(irq_nr), IRQ_TYPE_NONE);
for (irq_nr = AU1000_INTC1_INT_BASE;
(irq_nr < AU1000_INTC1_INT_BASE + 32); irq_nr++)
au1x_ic_settype(irq_get_irq_data(irq_nr), IRQ_TYPE_NONE);
/*
* Initialize IC0, which is fixed per processor.
*/
while (map->im_irq != -1) {
irq_nr = map->im_irq;
if (irq_nr >= AU1000_INTC1_INT_BASE) {
bit = irq_nr - AU1000_INTC1_INT_BASE;
base = (void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR);
} else {
bit = irq_nr - AU1000_INTC0_INT_BASE;
base = (void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR);
}
if (map->im_request)
__raw_writel(1 << bit, base + IC_ASSIGNSET);
au1x_ic_settype(irq_get_irq_data(irq_nr), map->im_type);
++map;
}
set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3);
}
void __init arch_init_irq(void)
{
switch (alchemy_get_cputype()) {
case ALCHEMY_CPU_AU1000:
au1000_init_irq(au1000_irqmap);
break;
case ALCHEMY_CPU_AU1500:
au1000_init_irq(au1500_irqmap);
break;
case ALCHEMY_CPU_AU1100:
au1000_init_irq(au1100_irqmap);
break;
case ALCHEMY_CPU_AU1550:
au1000_init_irq(au1550_irqmap);
break;
case ALCHEMY_CPU_AU1200:
au1000_init_irq(au1200_irqmap);
break;
}
}
static unsigned long alchemy_ic_pmdata[7 * 2];
static inline void alchemy_ic_suspend_one(void __iomem *base, unsigned long *d)
{
d[0] = __raw_readl(base + IC_CFG0RD);
d[1] = __raw_readl(base + IC_CFG1RD);
d[2] = __raw_readl(base + IC_CFG2RD);
d[3] = __raw_readl(base + IC_SRCRD);
d[4] = __raw_readl(base + IC_ASSIGNRD);
d[5] = __raw_readl(base + IC_WAKERD);
d[6] = __raw_readl(base + IC_MASKRD);
ic_init(base); /* shut it up too while at it */
}
static inline void alchemy_ic_resume_one(void __iomem *base, unsigned long *d)
{
ic_init(base);
__raw_writel(d[0], base + IC_CFG0SET);
__raw_writel(d[1], base + IC_CFG1SET);
__raw_writel(d[2], base + IC_CFG2SET);
__raw_writel(d[3], base + IC_SRCSET);
__raw_writel(d[4], base + IC_ASSIGNSET);
__raw_writel(d[5], base + IC_WAKESET);
wmb();
__raw_writel(d[6], base + IC_MASKSET);
wmb();
}
static int alchemy_ic_suspend(void)
{
alchemy_ic_suspend_one((void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR),
alchemy_ic_pmdata);
alchemy_ic_suspend_one((void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR),
&alchemy_ic_pmdata[7]);
return 0;
}
static void alchemy_ic_resume(void)
{
alchemy_ic_resume_one((void __iomem *)KSEG1ADDR(AU1000_IC1_PHYS_ADDR),
&alchemy_ic_pmdata[7]);
alchemy_ic_resume_one((void __iomem *)KSEG1ADDR(AU1000_IC0_PHYS_ADDR),
alchemy_ic_pmdata);
}
static struct syscore_ops alchemy_ic_syscore_ops = {
.suspend = alchemy_ic_suspend,
.resume = alchemy_ic_resume,
};
static int __init alchemy_ic_pm_init(void)
{
register_syscore_ops(&alchemy_ic_syscore_ops);
return 0;
}
device_initcall(alchemy_ic_pm_init);