From mboxrd@z Thu Jan 1 00:00:00 1970 From: shawn.guo@freescale.com (Shawn Guo) Date: Fri, 26 Nov 2010 14:49:03 +0800 Subject: [PATCH 04/15] ARM: mxs: Add interrupt support In-Reply-To: <1290754154-9428-1-git-send-email-shawn.guo@freescale.com> References: <1290754154-9428-1-git-send-email-shawn.guo@freescale.com> Message-ID: <1290754154-9428-5-git-send-email-shawn.guo@freescale.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add Interrupt Collector (ICOLL) support for MXS-based. Signed-off-by: Shawn Guo --- arch/arm/mach-mxs/icoll.c | 77 ++++++++++++++++++++++++++ arch/arm/mach-mxs/include/mach/entry-macro.S | 36 ++++++++++++ 2 files changed, 113 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-mxs/icoll.c create mode 100644 arch/arm/mach-mxs/include/mach/entry-macro.S diff --git a/arch/arm/mach-mxs/icoll.c b/arch/arm/mach-mxs/icoll.c new file mode 100644 index 0000000..a7a7d4f --- /dev/null +++ b/arch/arm/mach-mxs/icoll.c @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * 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 + +#include +#include + +#define HW_ICOLL_VECTOR 0x0000 +#define HW_ICOLL_LEVELACK 0x0010 +#define HW_ICOLL_CTRL 0x0020 +#define HW_ICOLL_INTERRUPTn_SET(n) (0x0124 + (n) * 0x10) +#define HW_ICOLL_INTERRUPTn_CLR(n) (0x0128 + (n) * 0x10) +#define BM_ICOLL_INTERRUPTn_ENABLE 0x00000004 +#define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 0x1 + +void __iomem *icoll_base; + +static void icoll_ack_irq(unsigned int irq) +{ + __raw_writel(0, icoll_base + HW_ICOLL_VECTOR); + + /* ACK current interrupt (level 0) */ + __raw_writel(BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0, + icoll_base + HW_ICOLL_LEVELACK); +} + +static void icoll_mask_irq(unsigned int irq) +{ + __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE, + icoll_base + HW_ICOLL_INTERRUPTn_CLR(irq)); +} + +static void icoll_unmask_irq(unsigned int irq) +{ + __raw_writel(BM_ICOLL_INTERRUPTn_ENABLE, + icoll_base + HW_ICOLL_INTERRUPTn_SET(irq)); +} + +static struct irq_chip mxs_icoll_chip = { + .ack = icoll_ack_irq, + .mask = icoll_mask_irq, + .unmask = icoll_unmask_irq, +}; + +void __init icoll_init_irq(void __iomem *irqbase) +{ + int i; + + icoll_base = irqbase; + + /* Reset icoll */ + mxs_reset_block(irqbase + HW_ICOLL_CTRL); + + for (i = 0; i < MXS_INTERNAL_IRQS; i++) { + set_irq_chip(i, &mxs_icoll_chip); + set_irq_handler(i, handle_level_irq); + set_irq_flags(i, IRQF_VALID); + } +} diff --git a/arch/arm/mach-mxs/include/mach/entry-macro.S b/arch/arm/mach-mxs/include/mach/entry-macro.S new file mode 100644 index 0000000..597948d --- /dev/null +++ b/arch/arm/mach-mxs/include/mach/entry-macro.S @@ -0,0 +1,36 @@ +/* + * Low-level IRQ helper macros for Freescale MXS-based + * + * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * 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. + */ + + .macro disable_fiq + .endm + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + ldr \base, =icoll_base + ldr \base, [\base] + ldr \irqnr, [\base, #0x70] + cmp \irqnr, #0x7F + moveqs \irqnr, #0 + .endm + + .macro get_irqnr_preamble, base, tmp + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + .endm -- 1.7.1