Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933105AbdLRHP4 (ORCPT ); Mon, 18 Dec 2017 02:15:56 -0500 Received: from mail-pl0-f66.google.com ([209.85.160.66]:44433 "EHLO mail-pl0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932789AbdLRHOO (ORCPT ); Mon, 18 Dec 2017 02:14:14 -0500 X-Google-Smtp-Source: ACJfBouCCgypMGKDyHdjHGKmjh58Qy6RSo8tuo1UV9BtjoIjhdR3FoV76MlCHymND8Frt25+vFRq2Q== From: Greentime Hu To: greentime@andestech.com, linux-kernel@vger.kernel.org, arnd@arndb.de, linux-arch@vger.kernel.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, robh+dt@kernel.org, netdev@vger.kernel.org, deanbo422@gmail.com, devicetree@vger.kernel.org, viro@zeniv.linux.org.uk, dhowells@redhat.com, will.deacon@arm.com, daniel.lezcano@linaro.org, linux-serial@vger.kernel.org, geert.uytterhoeven@gmail.com, linus.walleij@linaro.org, mark.rutland@arm.com, greg@kroah.com, ren_guo@c-sky.com, pombredanne@nexb.com Cc: green.hu@gmail.com, Rick Chen Subject: [PATCH v4 32/36] irqchip: Andestech Internal Vector Interrupt Controller driver Date: Mon, 18 Dec 2017 14:46:44 +0800 Message-Id: <3b747d3707c53509193c87e2e079e29085de18c6.1513577007.git.green.hu@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4258 Lines: 139 From: Greentime Hu This patch adds the Andestech Internal Vector Interrupt Controller driver. You can find the spec here. Ch4.9 of AndeStar SPA V3 Manual. http://www.andestech.com/product.php?cls=9 Signed-off-by: Rick Chen Signed-off-by: Greentime Hu Reviewed-by: Marc Zyngier --- drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-ativic32.c | 107 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 108 insertions(+) create mode 100644 drivers/irqchip/irq-ativic32.c diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index b842dfd..201ca9f 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -80,3 +80,4 @@ obj-$(CONFIG_ARCH_ASPEED) += irq-aspeed-vic.o irq-aspeed-i2c-ic.o obj-$(CONFIG_STM32_EXTI) += irq-stm32-exti.o obj-$(CONFIG_QCOM_IRQ_COMBINER) += qcom-irq-combiner.o obj-$(CONFIG_IRQ_UNIPHIER_AIDET) += irq-uniphier-aidet.o +obj-$(CONFIG_NDS32) += irq-ativic32.o diff --git a/drivers/irqchip/irq-ativic32.c b/drivers/irqchip/irq-ativic32.c new file mode 100644 index 0000000..f69a858 --- /dev/null +++ b/drivers/irqchip/irq-ativic32.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include +#include +#include +#include +#include +#include +#include +#include + +static void ativic32_ack_irq(struct irq_data *data) +{ + __nds32__mtsr_dsb(BIT(data->hwirq), NDS32_SR_INT_PEND2); +} + +static void ativic32_mask_irq(struct irq_data *data) +{ + unsigned long int_mask2 = __nds32__mfsr(NDS32_SR_INT_MASK2); + __nds32__mtsr_dsb(int_mask2 & (~(BIT(data->hwirq))), NDS32_SR_INT_MASK2); +} + +static void ativic32_unmask_irq(struct irq_data *data) +{ + unsigned long int_mask2 = __nds32__mfsr(NDS32_SR_INT_MASK2); + __nds32__mtsr_dsb(int_mask2 | (BIT(data->hwirq)), NDS32_SR_INT_MASK2); +} + +static struct irq_chip ativic32_chip = { + .name = "ativic32", + .irq_ack = ativic32_ack_irq, + .irq_mask = ativic32_mask_irq, + .irq_unmask = ativic32_unmask_irq, +}; + +static unsigned int __initdata nivic_map[6] = { 6, 2, 10, 16, 24, 32 }; + +static struct irq_domain *root_domain; +static int ativic32_irq_domain_map(struct irq_domain *id, unsigned int virq, + irq_hw_number_t hw) +{ + + unsigned long int_trigger_type; + u32 type; + struct irq_data *irq_data; + int_trigger_type = __nds32__mfsr(NDS32_SR_INT_TRIGGER); + irq_data = irq_get_irq_data(virq); + if (!irq_data) + return -EINVAL; + + if (int_trigger_type & (BIT(hw))) { + irq_set_chip_and_handler(virq, &ativic32_chip, handle_edge_irq); + type = IRQ_TYPE_EDGE_RISING; + } else { + irq_set_chip_and_handler(virq, &ativic32_chip, handle_level_irq); + type = IRQ_TYPE_LEVEL_HIGH; + } + + irqd_set_trigger_type(irq_data, type); + return 0; +} + +static struct irq_domain_ops ativic32_ops = { + .map = ativic32_irq_domain_map, + .xlate = irq_domain_xlate_onecell +}; + +static irq_hw_number_t get_intr_src(void) +{ + return ((__nds32__mfsr(NDS32_SR_ITYPE) & ITYPE_mskVECTOR) >> ITYPE_offVECTOR) + - NDS32_VECTOR_offINTERRUPT; +} + +asmlinkage void asm_do_IRQ(struct pt_regs *regs) +{ + irq_hw_number_t hwirq = get_intr_src(); + handle_domain_irq(root_domain, hwirq, regs); +} + +int __init ativic32_init_irq(struct device_node *node, struct device_node *parent) +{ + unsigned long int_vec_base, nivic, nr_ints; + + if (WARN(parent, "non-root ativic32 are not supported")) + return -EINVAL; + + int_vec_base = __nds32__mfsr(NDS32_SR_IVB); + + if (((int_vec_base & IVB_mskIVIC_VER) >> IVB_offIVIC_VER) == 0) + panic("Unable to use atcivic32 for this cpu.\n"); + + nivic = (int_vec_base & IVB_mskNIVIC) >> IVB_offNIVIC; + if (nivic >= ARRAY_SIZE(nivic_map)) + panic("The number of input for ativic32 is not supported.\n"); + + nr_ints = nivic_map[nivic]; + + root_domain = irq_domain_add_linear(node, nr_ints, + &ativic32_ops, NULL); + + if (!root_domain) + panic("%s: unable to create IRQ domain\n", node->full_name); + + return 0; +} +IRQCHIP_DECLARE(ativic32, "andestech,ativic32", ativic32_init_irq); -- 1.7.9.5