diff options
Diffstat (limited to 'arch/frv/kernel/irq-routing.c')
| -rw-r--r-- | arch/frv/kernel/irq-routing.c | 291 |
1 files changed, 0 insertions, 291 deletions
diff --git a/arch/frv/kernel/irq-routing.c b/arch/frv/kernel/irq-routing.c deleted file mode 100644 index 53886adf47de..000000000000 --- a/arch/frv/kernel/irq-routing.c +++ /dev/null @@ -1,291 +0,0 @@ -/* irq-routing.c: IRQ routing - * - * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * 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. - */ - -#include <linux/sched.h> -#include <linux/random.h> -#include <linux/init.h> -#include <linux/serial_reg.h> -#include <asm/io.h> -#include <asm/irq-routing.h> -#include <asm/irc-regs.h> -#include <asm/serial-regs.h> -#include <asm/dma.h> - -struct irq_level frv_irq_levels[16] = { - [0 ... 15] = { - .lock = SPIN_LOCK_UNLOCKED, - } -}; - -struct irq_group *irq_groups[NR_IRQ_GROUPS]; - -extern struct irq_group frv_cpu_irqs; - -void __init frv_irq_route(struct irq_source *source, int irqlevel) -{ - source->level = &frv_irq_levels[irqlevel]; - source->next = frv_irq_levels[irqlevel].sources; - frv_irq_levels[irqlevel].sources = source; -} - -void __init frv_irq_route_external(struct irq_source *source, int irq) -{ - int irqlevel = 0; - - switch (irq) { - case IRQ_CPU_EXTERNAL0: irqlevel = IRQ_XIRQ0_LEVEL; break; - case IRQ_CPU_EXTERNAL1: irqlevel = IRQ_XIRQ1_LEVEL; break; - case IRQ_CPU_EXTERNAL2: irqlevel = IRQ_XIRQ2_LEVEL; break; - case IRQ_CPU_EXTERNAL3: irqlevel = IRQ_XIRQ3_LEVEL; break; - case IRQ_CPU_EXTERNAL4: irqlevel = IRQ_XIRQ4_LEVEL; break; - case IRQ_CPU_EXTERNAL5: irqlevel = IRQ_XIRQ5_LEVEL; break; - case IRQ_CPU_EXTERNAL6: irqlevel = IRQ_XIRQ6_LEVEL; break; - case IRQ_CPU_EXTERNAL7: irqlevel = IRQ_XIRQ7_LEVEL; break; - default: BUG(); - } - - source->level = &frv_irq_levels[irqlevel]; - source->next = frv_irq_levels[irqlevel].sources; - frv_irq_levels[irqlevel].sources = source; -} - -void __init frv_irq_set_group(struct irq_group *group) -{ - irq_groups[group->first_irq >> NR_IRQ_LOG2_ACTIONS_PER_GROUP] = group; -} - -void distribute_irqs(struct irq_group *group, unsigned long irqmask) -{ - struct irqaction *action; - int irq; - - while (irqmask) { - asm("scan %1,gr0,%0" : "=r"(irq) : "r"(irqmask)); - if (irq < 0 || irq > 31) - asm volatile("break"); - irq = 31 - irq; - - irqmask &= ~(1 << irq); - action = group->actions[irq]; - - irq += group->first_irq; - - if (action) { - int status = 0; - -// if (!(action->flags & IRQF_DISABLED)) -// local_irq_enable(); - - do { - status |= action->flags; - action->handler(irq, action->dev_id, __frame); - action = action->next; - } while (action); - - if (status & IRQF_SAMPLE_RANDOM) - add_interrupt_randomness(irq); - local_irq_disable(); - } - } -} - -/*****************************************************************************/ -/* - * CPU UART interrupts - */ -static void frv_cpuuart_doirq(struct irq_source *source) -{ -// uint8_t iir = readb(source->muxdata + UART_IIR * 8); -// if ((iir & 0x0f) != UART_IIR_NO_INT) - distribute_irqs(&frv_cpu_irqs, source->irqmask); -} - -struct irq_source frv_cpuuart[2] = { -#define __CPUUART(X, A) \ - [X] = { \ - .muxname = "uart", \ - .muxdata = (volatile void __iomem *)(unsigned long)A,\ - .irqmask = 1 << IRQ_CPU_UART##X, \ - .doirq = frv_cpuuart_doirq, \ - } - - __CPUUART(0, UART0_BASE), - __CPUUART(1, UART1_BASE), -}; - -/*****************************************************************************/ -/* - * CPU DMA interrupts - */ -static void frv_cpudma_doirq(struct irq_source *source) -{ - uint32_t cstr = readl(source->muxdata + DMAC_CSTRx); - if (cstr & DMAC_CSTRx_INT) - distribute_irqs(&frv_cpu_irqs, source->irqmask); -} - -struct irq_source frv_cpudma[8] = { -#define __CPUDMA(X, A) \ - [X] = { \ - .muxname = "dma", \ - .muxdata = (volatile void __iomem *)(unsigned long)A,\ - .irqmask = 1 << IRQ_CPU_DMA##X, \ - .doirq = frv_cpudma_doirq, \ - } - - __CPUDMA(0, 0xfe000900), - __CPUDMA(1, 0xfe000980), - __CPUDMA(2, 0xfe000a00), - __CPUDMA(3, 0xfe000a80), - __CPUDMA(4, 0xfe001000), - __CPUDMA(5, 0xfe001080), - __CPUDMA(6, 0xfe001100), - __CPUDMA(7, 0xfe001180), -}; - -/*****************************************************************************/ -/* - * CPU timer interrupts - can't tell whether they've generated an interrupt or not - */ -static void frv_cputimer_doirq(struct irq_source *source) -{ - distribute_irqs(&frv_cpu_irqs, source->irqmask); -} - -struct irq_source frv_cputimer[3] = { -#define __CPUTIMER(X) \ - [X] = { \ - .muxname = "timer", \ - .muxdata = NULL, \ - .irqmask = 1 << IRQ_CPU_TIMER##X, \ - .doirq = frv_cputimer_doirq, \ - } - - __CPUTIMER(0), - __CPUTIMER(1), - __CPUTIMER(2), -}; - -/*****************************************************************************/ -/* - * external CPU interrupts - can't tell directly whether they've generated an interrupt or not - */ -static void frv_cpuexternal_doirq(struct irq_source *source) -{ - distribute_irqs(&frv_cpu_irqs, source->irqmask); -} - -struct irq_source frv_cpuexternal[8] = { -#define __CPUEXTERNAL(X) \ - [X] = { \ - .muxname = "ext", \ - .muxdata = NULL, \ - .irqmask = 1 << IRQ_CPU_EXTERNAL##X, \ - .doirq = frv_cpuexternal_doirq, \ - } - - __CPUEXTERNAL(0), - __CPUEXTERNAL(1), - __CPUEXTERNAL(2), - __CPUEXTERNAL(3), - __CPUEXTERNAL(4), - __CPUEXTERNAL(5), - __CPUEXTERNAL(6), - __CPUEXTERNAL(7), -}; - -#define set_IRR(N,A,B,C,D) __set_IRR(N, (A << 28) | (B << 24) | (C << 20) | (D << 16)) - -struct irq_group frv_cpu_irqs = { - .sources = { - [IRQ_CPU_UART0] = &frv_cpuuart[0], - [IRQ_CPU_UART1] = &frv_cpuuart[1], - [IRQ_CPU_TIMER0] = &frv_cputimer[0], - [IRQ_CPU_TIMER1] = &frv_cputimer[1], - [IRQ_CPU_TIMER2] = &frv_cputimer[2], - [IRQ_CPU_DMA0] = &frv_cpudma[0], - [IRQ_CPU_DMA1] = &frv_cpudma[1], - [IRQ_CPU_DMA2] = &frv_cpudma[2], - [IRQ_CPU_DMA3] = &frv_cpudma[3], - [IRQ_CPU_DMA4] = &frv_cpudma[4], - [IRQ_CPU_DMA5] = &frv_cpudma[5], - [IRQ_CPU_DMA6] = &frv_cpudma[6], - [IRQ_CPU_DMA7] = &frv_cpudma[7], - [IRQ_CPU_EXTERNAL0] = &frv_cpuexternal[0], - [IRQ_CPU_EXTERNAL1] = &frv_cpuexternal[1], - [IRQ_CPU_EXTERNAL2] = &frv_cpuexternal[2], - [IRQ_CPU_EXTERNAL3] = &frv_cpuexternal[3], - [IRQ_CPU_EXTERNAL4] = &frv_cpuexternal[4], - [IRQ_CPU_EXTERNAL5] = &frv_cpuexternal[5], - [IRQ_CPU_EXTERNAL6] = &frv_cpuexternal[6], - [IRQ_CPU_EXTERNAL7] = &frv_cpuexternal[7], - }, -}; - -/*****************************************************************************/ -/* - * route the CPU's interrupt sources - */ -void __init route_cpu_irqs(void) -{ - frv_irq_set_group(&frv_cpu_irqs); - - __set_IITMR(0, 0x003f0000); /* DMA0-3, TIMER0-2 IRQ detect levels */ - __set_IITMR(1, 0x20000000); /* ERR0-1, UART0-1, DMA4-7 IRQ detect levels */ - - /* route UART and error interrupts */ - frv_irq_route(&frv_cpuuart[0], IRQ_UART0_LEVEL); - frv_irq_route(&frv_cpuuart[1], IRQ_UART1_LEVEL); - - set_IRR(6, IRQ_GDBSTUB_LEVEL, IRQ_GDBSTUB_LEVEL, IRQ_UART1_LEVEL, IRQ_UART0_LEVEL); - - /* route DMA channel interrupts */ - frv_irq_route(&frv_cpudma[0], IRQ_DMA0_LEVEL); - frv_irq_route(&frv_cpudma[1], IRQ_DMA1_LEVEL); - frv_irq_route(&frv_cpudma[2], IRQ_DMA2_LEVEL); - frv_irq_route(&frv_cpudma[3], IRQ_DMA3_LEVEL); - frv_irq_route(&frv_cpudma[4], IRQ_DMA4_LEVEL); - frv_irq_route(&frv_cpudma[5], IRQ_DMA5_LEVEL); - frv_irq_route(&frv_cpudma[6], IRQ_DMA6_LEVEL); - frv_irq_route(&frv_cpudma[7], IRQ_DMA7_LEVEL); - - set_IRR(4, IRQ_DMA3_LEVEL, IRQ_DMA2_LEVEL, IRQ_DMA1_LEVEL, IRQ_DMA0_LEVEL); - set_IRR(7, IRQ_DMA7_LEVEL, IRQ_DMA6_LEVEL, IRQ_DMA5_LEVEL, IRQ_DMA4_LEVEL); - - /* route timer interrupts */ - frv_irq_route(&frv_cputimer[0], IRQ_TIMER0_LEVEL); - frv_irq_route(&frv_cputimer[1], IRQ_TIMER1_LEVEL); - frv_irq_route(&frv_cputimer[2], IRQ_TIMER2_LEVEL); - - set_IRR(5, 0, IRQ_TIMER2_LEVEL, IRQ_TIMER1_LEVEL, IRQ_TIMER0_LEVEL); - - /* route external interrupts */ - frv_irq_route(&frv_cpuexternal[0], IRQ_XIRQ0_LEVEL); - frv_irq_route(&frv_cpuexternal[1], IRQ_XIRQ1_LEVEL); - frv_irq_route(&frv_cpuexternal[2], IRQ_XIRQ2_LEVEL); - frv_irq_route(&frv_cpuexternal[3], IRQ_XIRQ3_LEVEL); - frv_irq_route(&frv_cpuexternal[4], IRQ_XIRQ4_LEVEL); - frv_irq_route(&frv_cpuexternal[5], IRQ_XIRQ5_LEVEL); - frv_irq_route(&frv_cpuexternal[6], IRQ_XIRQ6_LEVEL); - frv_irq_route(&frv_cpuexternal[7], IRQ_XIRQ7_LEVEL); - - set_IRR(2, IRQ_XIRQ7_LEVEL, IRQ_XIRQ6_LEVEL, IRQ_XIRQ5_LEVEL, IRQ_XIRQ4_LEVEL); - set_IRR(3, IRQ_XIRQ3_LEVEL, IRQ_XIRQ2_LEVEL, IRQ_XIRQ1_LEVEL, IRQ_XIRQ0_LEVEL); - -#if defined(CONFIG_MB93091_VDK) - __set_TM1(0x55550000); /* XIRQ7-0 all active low */ -#elif defined(CONFIG_MB93093_PDK) - __set_TM1(0x15550000); /* XIRQ7 active high, 6-0 all active low */ -#else -#error dont know external IRQ trigger levels for this setup -#endif - -} /* end route_cpu_irqs() */ |