diff options
Diffstat (limited to 'arch/m68knommu/platform/coldfire/intc.c')
| -rw-r--r-- | arch/m68knommu/platform/coldfire/intc.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/arch/m68knommu/platform/coldfire/intc.c b/arch/m68knommu/platform/coldfire/intc.c deleted file mode 100644 index d648081a63f..00000000000 --- a/arch/m68knommu/platform/coldfire/intc.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * intc.c -- support for the old ColdFire interrupt controller - * - * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com> - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive - * for more details. - */ - -#include <linux/types.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/io.h> -#include <asm/traps.h> -#include <asm/coldfire.h> -#include <asm/mcfsim.h> - -/* - * The mapping of irq number to a mask register bit is not one-to-one. - * The irq numbers are either based on "level" of interrupt or fixed - * for an autovector-able interrupt. So we keep a local data structure - * that maps from irq to mask register. Not all interrupts will have - * an IMR bit. - */ -unsigned char mcf_irq2imr[NR_IRQS]; - -/* - * Define the miniumun and maximum external interrupt numbers. - * This is also used as the "level" interrupt numbers. - */ -#define EIRQ1 25 -#define EIRQ7 31 - -/* - * In the early version 2 core ColdFire parts the IMR register was 16 bits - * in size. Version 3 (and later version 2) core parts have a 32 bit - * sized IMR register. Provide some size independant methods to access the - * IMR register. - */ -#ifdef MCFSIM_IMR_IS_16BITS - -void mcf_setimr(int index) -{ - u16 imr; - imr = __raw_readw(MCF_MBAR + MCFSIM_IMR); - __raw_writew(imr | (0x1 << index), MCF_MBAR + MCFSIM_IMR); -} - -void mcf_clrimr(int index) -{ - u16 imr; - imr = __raw_readw(MCF_MBAR + MCFSIM_IMR); - __raw_writew(imr & ~(0x1 << index), MCF_MBAR + MCFSIM_IMR); -} - -void mcf_maskimr(unsigned int mask) -{ - u16 imr; - imr = __raw_readw(MCF_MBAR + MCFSIM_IMR); - imr |= mask; - __raw_writew(imr, MCF_MBAR + MCFSIM_IMR); -} - -#else - -void mcf_setimr(int index) -{ - u32 imr; - imr = __raw_readl(MCF_MBAR + MCFSIM_IMR); - __raw_writel(imr | (0x1 << index), MCF_MBAR + MCFSIM_IMR); -} - -void mcf_clrimr(int index) -{ - u32 imr; - imr = __raw_readl(MCF_MBAR + MCFSIM_IMR); - __raw_writel(imr & ~(0x1 << index), MCF_MBAR + MCFSIM_IMR); -} - -void mcf_maskimr(unsigned int mask) -{ - u32 imr; - imr = __raw_readl(MCF_MBAR + MCFSIM_IMR); - imr |= mask; - __raw_writel(imr, MCF_MBAR + MCFSIM_IMR); -} - -#endif - -/* - * Interrupts can be "vectored" on the ColdFire cores that support this old - * interrupt controller. That is, the device raising the interrupt can also - * supply the vector number to interrupt through. The AVR register of the - * interrupt controller enables or disables this for each external interrupt, - * so provide generic support for this. Setting this up is out-of-band for - * the interrupt system API's, and needs to be done by the driver that - * supports this device. Very few devices actually use this. - */ -void mcf_autovector(int irq) -{ -#ifdef MCFSIM_AVR - if ((irq >= EIRQ1) && (irq <= EIRQ7)) { - u8 avec; - avec = __raw_readb(MCF_MBAR + MCFSIM_AVR); - avec |= (0x1 << (irq - EIRQ1 + 1)); - __raw_writeb(avec, MCF_MBAR + MCFSIM_AVR); - } -#endif -} - -static void intc_irq_mask(struct irq_data *d) -{ - if (mcf_irq2imr[d->irq]) - mcf_setimr(mcf_irq2imr[d->irq]); -} - -static void intc_irq_unmask(struct irq_data *d) -{ - if (mcf_irq2imr[d->irq]) - mcf_clrimr(mcf_irq2imr[d->irq]); -} - -static int intc_irq_set_type(struct irq_data *d, unsigned int type) -{ - return 0; -} - -static struct irq_chip intc_irq_chip = { - .name = "CF-INTC", - .irq_mask = intc_irq_mask, - .irq_unmask = intc_irq_unmask, - .irq_set_type = intc_irq_set_type, -}; - -void __init init_IRQ(void) -{ - int irq; - - init_vectors(); - mcf_maskimr(0xffffffff); - - for (irq = 0; (irq < NR_IRQS); irq++) { - set_irq_chip(irq, &intc_irq_chip); - set_irq_type(irq, IRQ_TYPE_LEVEL_HIGH); - set_irq_handler(irq, handle_level_irq); - } -} - |