diff options
Diffstat (limited to 'arch/mips/alchemy/common/irq.c')
| -rw-r--r-- | arch/mips/alchemy/common/irq.c | 646 |
1 files changed, 646 insertions, 0 deletions
diff --git a/arch/mips/alchemy/common/irq.c b/arch/mips/alchemy/common/irq.c new file mode 100644 index 00000000..8b60ba06 --- /dev/null +++ b/arch/mips/alchemy/common/irq.c @@ -0,0 +1,646 @@ +/* + * 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); |