diff options
Diffstat (limited to 'arch/mips/alchemy/common/irq.c')
| -rw-r--r-- | arch/mips/alchemy/common/irq.c | 745 |
1 files changed, 380 insertions, 365 deletions
diff --git a/arch/mips/alchemy/common/irq.c b/arch/mips/alchemy/common/irq.c index 40c6ceceb5f..c88c821b4c3 100644 --- a/arch/mips/alchemy/common/irq.c +++ b/arch/mips/alchemy/common/irq.c @@ -24,6 +24,7 @@ * 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> @@ -36,15 +37,172 @@ #include <asm/mach-pb1x00/pb1000.h> #endif -#define EXT_INTC0_REQ0 2 /* IP 2 */ -#define EXT_INTC0_REQ1 3 /* IP 3 */ -#define EXT_INTC1_REQ0 4 /* IP 4 */ -#define EXT_INTC1_REQ1 5 /* IP 5 */ -#define MIPS_TIMER_IP 7 /* IP 7 */ - -void (*board_init_irq)(void) __initdata = NULL; +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 +}; -static DEFINE_SPINLOCK(irq_lock); #ifdef CONFIG_PM @@ -130,67 +288,47 @@ void restore_au1xxx_intctl(void) #endif /* CONFIG_PM */ -inline void local_enable_irq(unsigned int irq_nr) +static void au1x_ic0_unmask(unsigned int irq_nr) { unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE; - - if (bit >= 32) { - au_writel(1 << (bit - 32), IC1_MASKSET); - au_writel(1 << (bit - 32), IC1_WAKESET); - } else { - au_writel(1 << bit, IC0_MASKSET); - au_writel(1 << bit, IC0_WAKESET); - } + au_writel(1 << bit, IC0_MASKSET); + au_writel(1 << bit, IC0_WAKESET); au_sync(); } - -inline void local_disable_irq(unsigned int irq_nr) +static void au1x_ic1_unmask(unsigned int irq_nr) { - unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE; + unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE; + au_writel(1 << bit, IC1_MASKSET); + au_writel(1 << bit, IC1_WAKESET); - if (bit >= 32) { - au_writel(1 << (bit - 32), IC1_MASKCLR); - au_writel(1 << (bit - 32), IC1_WAKECLR); - } else { - au_writel(1 << bit, IC0_MASKCLR); - au_writel(1 << bit, IC0_WAKECLR); - } +/* 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 inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr) +static void au1x_ic0_mask(unsigned int irq_nr) { unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE; - - if (bit >= 32) { - au_writel(1 << (bit - 32), IC1_RISINGCLR); - au_writel(1 << (bit - 32), IC1_MASKCLR); - } else { - au_writel(1 << bit, IC0_RISINGCLR); - au_writel(1 << bit, IC0_MASKCLR); - } + au_writel(1 << bit, IC0_MASKCLR); + au_writel(1 << bit, IC0_WAKECLR); au_sync(); } - -static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr) +static void au1x_ic1_mask(unsigned int irq_nr) { - unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE; - - if (bit >= 32) { - au_writel(1 << (bit - 32), IC1_FALLINGCLR); - au_writel(1 << (bit - 32), IC1_MASKCLR); - } else { - au_writel(1 << bit, IC0_FALLINGCLR); - au_writel(1 << bit, IC0_MASKCLR); - } + unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE; + au_writel(1 << bit, IC1_MASKCLR); + au_writel(1 << bit, IC1_WAKECLR); au_sync(); } - -static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr) +static void au1x_ic0_ack(unsigned int irq_nr) { unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE; @@ -198,349 +336,229 @@ static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr) * This may assume that we don't get interrupts from * both edges at once, or if we do, that we don't care. */ - if (bit >= 32) { - au_writel(1 << (bit - 32), IC1_FALLINGCLR); - au_writel(1 << (bit - 32), IC1_RISINGCLR); - au_writel(1 << (bit - 32), IC1_MASKCLR); - } else { - au_writel(1 << bit, IC0_FALLINGCLR); - au_writel(1 << bit, IC0_RISINGCLR); - au_writel(1 << bit, IC0_MASKCLR); - } + au_writel(1 << bit, IC0_FALLINGCLR); + au_writel(1 << bit, IC0_RISINGCLR); au_sync(); } -static inline void mask_and_ack_level_irq(unsigned int irq_nr) +static void au1x_ic1_ack(unsigned int irq_nr) { - local_disable_irq(irq_nr); - au_sync(); -#if defined(CONFIG_MIPS_PB1000) - if (irq_nr == AU1000_GPIO_15) { - au_writel(0x8000, PB1000_MDR); /* ack int */ - au_sync(); - } -#endif -} - -static void end_irq(unsigned int irq_nr) -{ - if (!(irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS))) - local_enable_irq(irq_nr); + unsigned int bit = irq_nr - AU1000_INTC1_INT_BASE; -#if defined(CONFIG_MIPS_PB1000) - if (irq_nr == AU1000_GPIO_15) { - au_writel(0x4000, PB1000_MDR); /* enable int */ - au_sync(); - } -#endif + /* + * 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(); } -unsigned long save_local_and_disable(int controller) +static int au1x_ic1_setwake(unsigned int irq, unsigned int on) { - int i; - unsigned long flags, mask; - - spin_lock_irqsave(&irq_lock, flags); - if (controller) { - mask = au_readl(IC1_MASKSET); - for (i = 32; i < 64; i++) - local_disable_irq(i); - } else { - mask = au_readl(IC0_MASKSET); - for (i = 0; i < 32; i++) - local_disable_irq(i); - } - spin_unlock_irqrestore(&irq_lock, flags); - - return mask; -} + unsigned int bit = irq - AU1000_INTC1_INT_BASE; + unsigned long wakemsk, flags; -void restore_local_and_enable(int controller, unsigned long mask) -{ - int i; - unsigned long flags, new_mask; - - spin_lock_irqsave(&irq_lock, flags); - for (i = 0; i < 32; i++) - if (mask & (1 << i)) { - if (controller) - local_enable_irq(i + 32); - else - local_enable_irq(i); - } + /* only GPIO 0-7 can act as wakeup source: */ + if ((irq < AU1000_GPIO_0) || (irq > AU1000_GPIO_7)) + return -EINVAL; - if (controller) - new_mask = au_readl(IC1_MASKSET); + local_irq_save(flags); + wakemsk = au_readl(SYS_WAKEMSK); + if (on) + wakemsk |= 1 << bit; else - new_mask = au_readl(IC0_MASKSET); + wakemsk &= ~(1 << bit); + au_writel(wakemsk, SYS_WAKEMSK); + au_sync(); + local_irq_restore(flags); - spin_unlock_irqrestore(&irq_lock, flags); + return 0; } - -static struct irq_chip rise_edge_irq_type = { - .name = "Au1000 Rise Edge", - .ack = mask_and_ack_rise_edge_irq, - .mask = local_disable_irq, - .mask_ack = mask_and_ack_rise_edge_irq, - .unmask = local_enable_irq, - .end = end_irq, -}; - -static struct irq_chip fall_edge_irq_type = { - .name = "Au1000 Fall Edge", - .ack = mask_and_ack_fall_edge_irq, - .mask = local_disable_irq, - .mask_ack = mask_and_ack_fall_edge_irq, - .unmask = local_enable_irq, - .end = end_irq, -}; - -static struct irq_chip either_edge_irq_type = { - .name = "Au1000 Rise or Fall Edge", - .ack = mask_and_ack_either_edge_irq, - .mask = local_disable_irq, - .mask_ack = mask_and_ack_either_edge_irq, - .unmask = local_enable_irq, - .end = end_irq, +/* + * 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 level_irq_type = { - .name = "Au1000 Level", - .ack = mask_and_ack_level_irq, - .mask = local_disable_irq, - .mask_ack = mask_and_ack_level_irq, - .unmask = local_enable_irq, - .end = end_irq, +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 void __init setup_local_irq(unsigned int irq_nr, int type, int int_req) +static int au1x_ic_settype(unsigned int irq, unsigned int flow_type) { - unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE; - - if (irq_nr > AU1000_MAX_INTR) - return; - - /* Config2[n], Config1[n], Config0[n] */ - if (bit >= 32) { - switch (type) { - case INTC_INT_RISE_EDGE: /* 0:0:1 */ - au_writel(1 << (bit - 32), IC1_CFG2CLR); - au_writel(1 << (bit - 32), IC1_CFG1CLR); - au_writel(1 << (bit - 32), IC1_CFG0SET); - set_irq_chip(irq_nr, &rise_edge_irq_type); - break; - case INTC_INT_FALL_EDGE: /* 0:1:0 */ - au_writel(1 << (bit - 32), IC1_CFG2CLR); - au_writel(1 << (bit - 32), IC1_CFG1SET); - au_writel(1 << (bit - 32), IC1_CFG0CLR); - set_irq_chip(irq_nr, &fall_edge_irq_type); - break; - case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */ - au_writel(1 << (bit - 32), IC1_CFG2CLR); - au_writel(1 << (bit - 32), IC1_CFG1SET); - au_writel(1 << (bit - 32), IC1_CFG0SET); - set_irq_chip(irq_nr, &either_edge_irq_type); - break; - case INTC_INT_HIGH_LEVEL: /* 1:0:1 */ - au_writel(1 << (bit - 32), IC1_CFG2SET); - au_writel(1 << (bit - 32), IC1_CFG1CLR); - au_writel(1 << (bit - 32), IC1_CFG0SET); - set_irq_chip(irq_nr, &level_irq_type); - break; - case INTC_INT_LOW_LEVEL: /* 1:1:0 */ - au_writel(1 << (bit - 32), IC1_CFG2SET); - au_writel(1 << (bit - 32), IC1_CFG1SET); - au_writel(1 << (bit - 32), IC1_CFG0CLR); - set_irq_chip(irq_nr, &level_irq_type); - break; - case INTC_INT_DISABLED: /* 0:0:0 */ - au_writel(1 << (bit - 32), IC1_CFG0CLR); - au_writel(1 << (bit - 32), IC1_CFG1CLR); - au_writel(1 << (bit - 32), IC1_CFG2CLR); - break; - default: /* disable the interrupt */ - printk(KERN_WARNING "unexpected int type %d (irq %d)\n", - type, irq_nr); - au_writel(1 << (bit - 32), IC1_CFG0CLR); - au_writel(1 << (bit - 32), IC1_CFG1CLR); - au_writel(1 << (bit - 32), IC1_CFG2CLR); - return; - } - if (int_req) /* assign to interrupt request 1 */ - au_writel(1 << (bit - 32), IC1_ASSIGNCLR); - else /* assign to interrupt request 0 */ - au_writel(1 << (bit - 32), IC1_ASSIGNSET); - au_writel(1 << (bit - 32), IC1_SRCSET); - au_writel(1 << (bit - 32), IC1_MASKCLR); - au_writel(1 << (bit - 32), IC1_WAKECLR); + 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 { - switch (type) { - case INTC_INT_RISE_EDGE: /* 0:0:1 */ - au_writel(1 << bit, IC0_CFG2CLR); - au_writel(1 << bit, IC0_CFG1CLR); - au_writel(1 << bit, IC0_CFG0SET); - set_irq_chip(irq_nr, &rise_edge_irq_type); - break; - case INTC_INT_FALL_EDGE: /* 0:1:0 */ - au_writel(1 << bit, IC0_CFG2CLR); - au_writel(1 << bit, IC0_CFG1SET); - au_writel(1 << bit, IC0_CFG0CLR); - set_irq_chip(irq_nr, &fall_edge_irq_type); - break; - case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */ - au_writel(1 << bit, IC0_CFG2CLR); - au_writel(1 << bit, IC0_CFG1SET); - au_writel(1 << bit, IC0_CFG0SET); - set_irq_chip(irq_nr, &either_edge_irq_type); - break; - case INTC_INT_HIGH_LEVEL: /* 1:0:1 */ - au_writel(1 << bit, IC0_CFG2SET); - au_writel(1 << bit, IC0_CFG1CLR); - au_writel(1 << bit, IC0_CFG0SET); - set_irq_chip(irq_nr, &level_irq_type); - break; - case INTC_INT_LOW_LEVEL: /* 1:1:0 */ - au_writel(1 << bit, IC0_CFG2SET); - au_writel(1 << bit, IC0_CFG1SET); - au_writel(1 << bit, IC0_CFG0CLR); - set_irq_chip(irq_nr, &level_irq_type); - break; - case INTC_INT_DISABLED: /* 0:0:0 */ - au_writel(1 << bit, IC0_CFG0CLR); - au_writel(1 << bit, IC0_CFG1CLR); - au_writel(1 << bit, IC0_CFG2CLR); - break; - default: /* disable the interrupt */ - printk(KERN_WARNING "unexpected int type %d (irq %d)\n", - type, irq_nr); - au_writel(1 << bit, IC0_CFG0CLR); - au_writel(1 << bit, IC0_CFG1CLR); - au_writel(1 << bit, IC0_CFG2CLR); - return; - } - if (int_req) /* assign to interrupt request 1 */ - au_writel(1 << bit, IC0_ASSIGNCLR); - else /* assign to interrupt request 0 */ - au_writel(1 << bit, IC0_ASSIGNSET); - au_writel(1 << bit, IC0_SRCSET); - au_writel(1 << bit, IC0_MASKCLR); - au_writel(1 << bit, IC0_WAKECLR); + 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(); -} -/* - * Interrupts are nested. Even if an interrupt handler is registered - * as "fast", we might get another interrupt before we return from - * intcX_reqX_irqdispatch(). - */ + return ret; +} -static void intc0_req0_irqdispatch(void) +asmlinkage void plat_irq_dispatch(void) { - static unsigned long intc0_req0; - unsigned int bit; - - intc0_req0 |= au_readl(IC0_REQ0INT); + unsigned int pending = read_c0_status() & read_c0_cause(); + unsigned long s, off, bit; - if (!intc0_req0) + 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. */ - if ((intc0_req0 & (1 << AU1000_USB_DEV_REQ_INT))) { - intc0_req0 &= ~(1 << AU1000_USB_DEV_REQ_INT); + 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 - bit = __ffs(intc0_req0); - intc0_req0 &= ~(1 << bit); - do_IRQ(AU1000_INTC0_INT_BASE + bit); + do_IRQ(__ffs(s) + off); } - -static void intc0_req1_irqdispatch(void) -{ - static unsigned long intc0_req1; - unsigned int bit; - - intc0_req1 |= au_readl(IC0_REQ1INT); - - if (!intc0_req1) - return; - - bit = __ffs(intc0_req1); - intc0_req1 &= ~(1 << bit); - do_IRQ(AU1000_INTC0_INT_BASE + bit); -} - - -/* - * Interrupt Controller 1: - * interrupts 32 - 63 - */ -static void intc1_req0_irqdispatch(void) +/* setup edge/level and assign request 0/1 */ +void __init au1xxx_setup_irqmap(struct au1xxx_irqmap *map, int count) { - static unsigned long intc1_req0; - unsigned int bit; - - intc1_req0 |= au_readl(IC1_REQ0INT); - - if (!intc1_req0) - return; - - bit = __ffs(intc1_req0); - intc1_req0 &= ~(1 << bit); - do_IRQ(AU1000_INTC1_INT_BASE + bit); -} - - -static void intc1_req1_irqdispatch(void) -{ - static unsigned long intc1_req1; - unsigned int bit; - - intc1_req1 |= au_readl(IC1_REQ1INT); - - if (!intc1_req1) - return; - - bit = __ffs(intc1_req1); - intc1_req1 &= ~(1 << bit); - do_IRQ(AU1000_INTC1_INT_BASE + bit); -} - -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_status() & read_c0_cause(); + 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); + } - if (pending & CAUSEF_IP7) - do_IRQ(MIPS_CPU_IRQ_BASE + 7); - else if (pending & CAUSEF_IP2) - intc0_req0_irqdispatch(); - else if (pending & CAUSEF_IP3) - intc0_req1_irqdispatch(); - else if (pending & CAUSEF_IP4) - intc1_req0_irqdispatch(); - else if (pending & CAUSEF_IP5) - intc1_req1_irqdispatch(); - else - spurious_interrupt(); + au1x_ic_settype(irq_nr, map[count].im_type); + } } void __init arch_init_irq(void) { int i; - struct au1xxx_irqmap *imp; - extern struct au1xxx_irqmap au1xxx_irq_map[]; - extern struct au1xxx_irqmap au1xxx_ic0_map[]; - extern int au1xxx_nr_irqs; - extern int au1xxx_ic0_nr_irqs; /* * Initialize interrupt controllers to a safe state. @@ -569,28 +587,25 @@ void __init arch_init_irq(void) mips_cpu_irq_init(); - /* - * Initialize IC0, which is fixed per processor. + /* register all 64 possible IC0+IC1 irq sources as type "none". + * Use set_irq_type() to set edge/level behaviour at runtime. */ - imp = au1xxx_ic0_map; - for (i = 0; i < au1xxx_ic0_nr_irqs; i++) { - setup_local_irq(imp->im_irq, imp->im_type, imp->im_request); - imp++; - } + 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); /* - * Now set up the irq mapping for the board. + * Initialize IC0, which is fixed per processor. */ - imp = au1xxx_irq_map; - for (i = 0; i < au1xxx_nr_irqs; i++) { - setup_local_irq(imp->im_irq, imp->im_type, imp->im_request); - imp++; - } - - set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4); + au1xxx_setup_irqmap(au1xxx_ic0_map, ARRAY_SIZE(au1xxx_ic0_map)); - /* Board specific IRQ initialization. + /* Boards can register additional (GPIO-based) IRQs. */ - if (board_init_irq) - board_init_irq(); + board_init_irq(); + + set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3); } |