From: Peter Horton Date: Mon, 6 Dec 2010 11:37:38 +0000 (+0000) Subject: mx51: support FIQ on TZIC, revised X-Git-Tag: v2.6.38-rc1~38^2~3^2~46 X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=cdc3f10630ecddb7870e087ff9679eef3d7b4e21;p=~andy%2Flinux mx51: support FIQ on TZIC, revised Add support for FIQ on mx51 TZIC TZIC changes tested with FIQ audio on an mx51 board AVIC changes build with mx3_defconfig, not tested Signed-off-by: Peter Horton Signed-off-by: Sascha Hauer --- diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile index 989cb59e67a..5fd20e96876 100644 --- a/arch/arm/plat-mxc/Makefile +++ b/arch/arm/plat-mxc/Makefile @@ -3,7 +3,7 @@ # # Common support -obj-y := clock.o gpio.o time.o devices.o cpu.o system.o +obj-y := clock.o gpio.o time.o devices.o cpu.o system.o irq-common.o # MX51 uses the TZIC interrupt controller, older platforms use AVIC obj-$(CONFIG_MXC_TZIC) += tzic.o diff --git a/arch/arm/plat-mxc/avic.c b/arch/arm/plat-mxc/avic.c index 7331f2ace5f..9a4e8a22dd0 100644 --- a/arch/arm/plat-mxc/avic.c +++ b/arch/arm/plat-mxc/avic.c @@ -24,6 +24,8 @@ #include #include +#include "irq-common.h" + #define AVIC_INTCNTL 0x00 /* int control reg */ #define AVIC_NIMASK 0x04 /* int mask reg */ #define AVIC_INTENNUM 0x08 /* int enable number reg */ @@ -46,9 +48,9 @@ void __iomem *avic_base; -int imx_irq_set_priority(unsigned char irq, unsigned char prio) -{ #ifdef CONFIG_MXC_IRQ_PRIOR +static int avic_irq_set_priority(unsigned char irq, unsigned char prio) +{ unsigned int temp; unsigned int mask = 0x0F << irq % 8 * 4; @@ -62,14 +64,11 @@ int imx_irq_set_priority(unsigned char irq, unsigned char prio) __raw_writel(temp, avic_base + AVIC_NIPRIORITY(irq / 8)); return 0; -#else - return -ENOSYS; -#endif } -EXPORT_SYMBOL(imx_irq_set_priority); +#endif #ifdef CONFIG_FIQ -int mxc_set_irq_fiq(unsigned int irq, unsigned int type) +static int avic_set_irq_fiq(unsigned int irq, unsigned int type) { unsigned int irqt; @@ -87,7 +86,6 @@ int mxc_set_irq_fiq(unsigned int irq, unsigned int type) return 0; } -EXPORT_SYMBOL(mxc_set_irq_fiq); #endif /* CONFIG_FIQ */ /* Disable interrupt number "irq" in the AVIC */ @@ -102,10 +100,18 @@ static void mxc_unmask_irq(unsigned int irq) __raw_writel(irq, avic_base + AVIC_INTENNUM); } -static struct irq_chip mxc_avic_chip = { - .ack = mxc_mask_irq, - .mask = mxc_mask_irq, - .unmask = mxc_unmask_irq, +static struct mxc_irq_chip mxc_avic_chip = { + .base = { + .ack = mxc_mask_irq, + .mask = mxc_mask_irq, + .unmask = mxc_unmask_irq, + }, +#ifdef CONFIG_MXC_IRQ_PRIOR + .set_priority = avic_irq_set_priority, +#endif +#ifdef CONFIG_FIQ + .set_irq_fiq = avic_set_irq_fiq, +#endif }; /* @@ -133,7 +139,7 @@ void __init mxc_init_irq(void __iomem *irqbase) __raw_writel(0, avic_base + AVIC_INTTYPEH); __raw_writel(0, avic_base + AVIC_INTTYPEL); for (i = 0; i < MXC_INTERNAL_IRQS; i++) { - set_irq_chip(i, &mxc_avic_chip); + set_irq_chip(i, &mxc_avic_chip.base); set_irq_handler(i, handle_level_irq); set_irq_flags(i, IRQF_VALID); } diff --git a/arch/arm/plat-mxc/include/mach/entry-macro.S b/arch/arm/plat-mxc/include/mach/entry-macro.S index aeb08697726..bd9bb979914 100644 --- a/arch/arm/plat-mxc/include/mach/entry-macro.S +++ b/arch/arm/plat-mxc/include/mach/entry-macro.S @@ -54,15 +54,15 @@ #elif defined CONFIG_MXC_TZIC @ Load offset & priority of the highest priority @ interrupt pending. + @ 0x080 is INTSEC0 register @ 0xD80 is HIPND0 register mov \irqnr, #0 - mov \irqstat, #0x0D80 -1000: - ldr \tmp, [\irqstat, \base] - cmp \tmp, #0 - bne 1001f - addeq \irqnr, \irqnr, #32 - addeq \irqstat, \irqstat, #4 +1000: add \irqstat, \base, \irqnr, lsr #3 + ldr \tmp, [\irqstat, #0xd80] + ldr \irqstat, [\irqstat, #0x080] + ands \tmp, \tmp, \irqstat + bne 1001f + add \irqnr, \irqnr, #32 cmp \irqnr, #128 blo 1000b b 2001f diff --git a/arch/arm/plat-mxc/irq-common.c b/arch/arm/plat-mxc/irq-common.c new file mode 100644 index 00000000000..0c799ac2773 --- /dev/null +++ b/arch/arm/plat-mxc/irq-common.c @@ -0,0 +1,60 @@ +/* + * Copyright (C) BitBox Ltd 2010 + * + * 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#include +#include + +#include "irq-common.h" + +int imx_irq_set_priority(unsigned char irq, unsigned char prio) +{ + struct mxc_irq_chip *chip; + struct irq_chip *base; + int ret; + + ret = -ENOSYS; + + base = get_irq_chip(irq); + if (base) { + chip = container_of(base, struct mxc_irq_chip, base); + if (chip->set_priority) + ret = chip->set_priority(irq, prio); + } + + return ret; +} +EXPORT_SYMBOL(imx_irq_set_priority); + +int mxc_set_irq_fiq(unsigned int irq, unsigned int type) +{ + struct mxc_irq_chip *chip; + struct irq_chip *base; + int ret; + + ret = -ENOSYS; + + base = get_irq_chip(irq); + if (base) { + chip = container_of(base, struct mxc_irq_chip, base); + if (chip->set_irq_fiq) + ret = chip->set_irq_fiq(irq, type); + } + + return ret; +} +EXPORT_SYMBOL(mxc_set_irq_fiq); diff --git a/arch/arm/plat-mxc/irq-common.h b/arch/arm/plat-mxc/irq-common.h new file mode 100644 index 00000000000..7203543fb1b --- /dev/null +++ b/arch/arm/plat-mxc/irq-common.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) BitBox Ltd 2010 + * + * 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#ifndef __PLAT_MXC_IRQ_COMMON_H__ +#define __PLAT_MXC_IRQ_COMMON_H__ + +struct mxc_irq_chip +{ + struct irq_chip base; + int (*set_priority)(unsigned char irq, unsigned char prio); + int (*set_irq_fiq)(unsigned int irq, unsigned int type); +}; + +#endif diff --git a/arch/arm/plat-mxc/tzic.c b/arch/arm/plat-mxc/tzic.c index 3703ab28257..e69ed8a8c20 100644 --- a/arch/arm/plat-mxc/tzic.c +++ b/arch/arm/plat-mxc/tzic.c @@ -21,6 +21,8 @@ #include #include +#include "irq-common.h" + /* ***************************************** * TZIC Registers * @@ -47,6 +49,25 @@ void __iomem *tzic_base; /* Used as irq controller base in entry-macro.S */ +#ifdef CONFIG_FIQ +static int tzic_set_irq_fiq(unsigned int irq, unsigned int type) +{ + unsigned int index, mask, value; + + index = irq >> 5; + if (unlikely(index >= 4)) + return -EINVAL; + mask = 1U << (irq & 0x1F); + + value = __raw_readl(tzic_base + TZIC_INTSEC0(index)) | mask; + if (type) + value &= ~mask; + __raw_writel(value, tzic_base + TZIC_INTSEC0(index)); + + return 0; +} +#endif + /** * tzic_mask_irq() - Disable interrupt number "irq" in the TZIC * @@ -104,12 +125,17 @@ static int tzic_set_wake_irq(unsigned int irq, unsigned int enable) return 0; } -static struct irq_chip mxc_tzic_chip = { - .name = "MXC_TZIC", - .ack = tzic_mask_irq, - .mask = tzic_mask_irq, - .unmask = tzic_unmask_irq, - .set_wake = tzic_set_wake_irq, +static struct mxc_irq_chip mxc_tzic_chip = { + .base = { + .name = "MXC_TZIC", + .ack = tzic_mask_irq, + .mask = tzic_mask_irq, + .unmask = tzic_unmask_irq, + .set_wake = tzic_set_wake_irq, + }, +#ifdef CONFIG_FIQ + .set_irq_fiq = tzic_set_irq_fiq, +#endif }; /* @@ -141,10 +167,16 @@ void __init tzic_init_irq(void __iomem *irqbase) /* all IRQ no FIQ Warning :: No selection */ for (i = 0; i < MXC_INTERNAL_IRQS; i++) { - set_irq_chip(i, &mxc_tzic_chip); + set_irq_chip(i, &mxc_tzic_chip.base); set_irq_handler(i, handle_level_irq); set_irq_flags(i, IRQF_VALID); } + +#ifdef CONFIG_FIQ + /* Initialize FIQ */ + init_FIQ(); +#endif + pr_info("TrustZone Interrupt Controller (TZIC) initialized\n"); }