From patchwork Thu Aug 3 11:15:10 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 9878727 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 79EDE60311 for ; Thu, 3 Aug 2017 11:16:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6880428780 for ; Thu, 3 Aug 2017 11:16:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5D2ED2887D; Thu, 3 Aug 2017 11:16:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, RCVD_IN_DNSWL_NONE, URIBL_BLACK autolearn=no version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A703B28780 for ; Thu, 3 Aug 2017 11:16:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=VxSrCSTk1ovQIbzfcYx9moN86ukkFRtJBIuvuf6M+PE=; b=iHq gZLSiZdIhhFy3yWL59hE7XHsbjwve6zc7Bw75D9C/QnHHslfRwpT2zI2CsvYyOCtKxDY1TH9XuPuI YMXujaQ3/cx/FskAkdWq/PivAjIDoam4fA9o7N6ZIzsPbsK9tG0zp7b1N1DdVimc7fBMmdHxHcIG8 jRVon0RGAB1DLz4qt+GdUSU/Qw1lplTrUVX8PhJsfyVD5nuMtvvmxOD7Qi4CSDlUU0hL9zaaAfwpD lKT51ZXR7n2c5i2fdNRRItVpWjhDM7yRC5ReO3UF8LYoqq9l2KomRu5Cetunhe7wPHZDegRU1MZqg sF77emVyA3mpM4tfl9h2QcGYIZfFS9Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1ddE78-0000jz-WE; Thu, 03 Aug 2017 11:16:27 +0000 Received: from conuserg-07.nifty.com ([210.131.2.74]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1ddE75-0000ii-4Z for linux-arm-kernel@lists.infradead.org; Thu, 03 Aug 2017 11:16:25 +0000 Received: from pug.e01.socionext.com (p14092-ipngnfx01kyoto.kyoto.ocn.ne.jp [153.142.97.92]) (authenticated) by conuserg-07.nifty.com with ESMTP id v73BFOQR000407; Thu, 3 Aug 2017 20:15:24 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-07.nifty.com v73BFOQR000407 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1501758925; bh=CLotnnaecDDF8DKleNPUS7r7PAgJ0BWQGqjCUOqDh4I=; h=From:To:Cc:Subject:Date:From; b=PJBlFmzswxCtmdQCqbzd4KpGS+hS/BljqD0BZs0929HW66HX2o6M862oyDCxUReHM 4UuwL2rc2QzivlCO/YFaOLQNVibH79PBgRkhpZFJ7eZWKYmYtCMELCvzRqNXcadGO/ ++cs7WtXdTS/PVvbJ7FDYykXs0PMwQmDO71mNvAr14Om9ZVtjntvMqO1NhD2yPSmka Jm0Y450u2u/6yX77kuji/KVfDAb3gJBUhFSysPVH+yR+rVIub67HWBwkCZlEZNmM1/ raK+7yA9aEw6mQBI6H2LHK4GEd9S7OPOM7qMeQ7zOkiIveoTpG3G9CWQKvUwOAapQ5 rL7J5EhDXzeaQ== X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: Thomas Gleixner , Jason Cooper , Marc Zyngier Subject: [PATCH] irqchip: uniphier-aidet: add UniPhier AIDET irqchip driver Date: Thu, 3 Aug 2017 20:15:10 +0900 Message-Id: <1501758910-3488-1-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170803_041623_412365_D8129B41 X-CRM114-Status: GOOD ( 23.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Masahiro Yamada , linux-kernel@vger.kernel.org, Jassi Brar , Rob Herring , Masami Hiramatsu , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP UniPhier SoCs contain AIDET (ARM Interrupt Detector). This is intended to provide additional features that are not covered by GIC. The main purpose is to provide logic inverter to support low level and falling edge trigger type for interrupt lines from on-board devices. Signed-off-by: Masahiro Yamada --- .../socionext,uniphier-aidet.txt | 32 +++ MAINTAINERS | 1 + drivers/irqchip/Kconfig | 5 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-uniphier-aidet.c | 252 +++++++++++++++++++++ 5 files changed, 291 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/socionext,uniphier-aidet.txt create mode 100644 drivers/irqchip/irq-uniphier-aidet.c diff --git a/Documentation/devicetree/bindings/interrupt-controller/socionext,uniphier-aidet.txt b/Documentation/devicetree/bindings/interrupt-controller/socionext,uniphier-aidet.txt new file mode 100644 index 000000000000..af57fbccd234 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/socionext,uniphier-aidet.txt @@ -0,0 +1,32 @@ +UniPhier AIDET + +UniPhier AIDET (ARM Interrupt Detector) is an add-on block for ARM GIC (Generic +Interrupt Controller). GIC itself can handle only high level and rising edge +interrupts. The AIDET provides logic inverter to support low level and falling +edge interrupts. + +Required properties: +- compatible: Should be one of the following: + "socionext,uniphier-ld4-aidet" - for LD4 SoC + "socionext,uniphier-pro4-aidet" - for Pro4 SoC + "socionext,uniphier-sld8-aidet" - for sLD8 SoC + "socionext,uniphier-pro5-aidet" - for Pro5 SoC + "socionext,uniphier-pxs2-aidet" - for PXs2/LD6b SoC + "socionext,uniphier-ld11-aidet" - for LD11 SoC + "socionext,uniphier-ld20-aidet" - for LD20 SoC + "socionext,uniphier-pxs3-aidet" - for PXs3 SoC +- reg: Specifies offset and length of the register set for the device. +- interrupt-controller: Identifies the node as an interrupt controller +- #interrupt-cells : Specifies the number of cells needed to encode an interrupt + source. The value should be 2. The first cell defines the interrupt number. + The second cell specifies the trigger type as defined in interrupts.txt in + this directory. + +Example: + + aidet: aidet@5fc20000 { + compatible = "socionext,uniphier-pro4-aidet"; + reg = <0x5fc20000 0x200>; + interrupt-controller; + #interrupt-cells = <2>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 567343b8ffaa..26b3d10b7344 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1993,6 +1993,7 @@ F: arch/arm64/boot/dts/socionext/ F: drivers/bus/uniphier-system-bus.c F: drivers/clk/uniphier/ F: drivers/i2c/busses/i2c-uniphier* +F: drivers/irqchip/irq-uniphier-aidet.c F: drivers/pinctrl/uniphier/ F: drivers/reset/reset-uniphier.c F: drivers/tty/serial/8250/8250_uniphier.c diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index f1fd5f44d1d4..a0d7218a1677 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -306,3 +306,8 @@ config QCOM_IRQ_COMBINER help Say yes here to add support for the IRQ combiner devices embedded in Qualcomm Technologies chips. + +config IRQ_UNIPHIER_AIDET + def_bool y + depends on ARCH_UNIPHIER || COMPILE_TEST + select IRQ_DOMAIN_HIERARCHY diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index e88d856cc09c..2c630574986f 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -78,3 +78,4 @@ obj-$(CONFIG_EZNPS_GIC) += irq-eznps.o obj-$(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 diff --git a/drivers/irqchip/irq-uniphier-aidet.c b/drivers/irqchip/irq-uniphier-aidet.c new file mode 100644 index 000000000000..8ceed5070e77 --- /dev/null +++ b/drivers/irqchip/irq-uniphier-aidet.c @@ -0,0 +1,252 @@ +/* + * Driver for UniPhier AIDET (ARM Interrupt Detector) + * + * Copyright (C) 2017 Socionext Inc. + * Author: Masahiro Yamada + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define UNIPHIER_AIDET_NR_IRQS 256 + +#define UNIPHIER_AIDET_DETCONF 0x00 + +struct uniphier_aidet_priv { + struct irq_chip chip; + struct irq_domain *domain; + void __iomem *reg_base; + spinlock_t lock; + u32 saved_vals[UNIPHIER_AIDET_NR_IRQS / 32]; +}; + +static void uniphier_aidet_reg_update(struct uniphier_aidet_priv *priv, + unsigned int reg, u32 mask, u32 val) +{ + unsigned long flags; + u32 tmp; + + spin_lock_irqsave(&priv->lock, flags); + tmp = readl(priv->reg_base + reg); + tmp &= ~mask; + tmp |= mask & val; + writel(tmp, priv->reg_base + reg); + spin_unlock_irqrestore(&priv->lock, flags); +} + +static void uniphier_aidet_detconf_update(struct uniphier_aidet_priv *priv, + unsigned long index, unsigned int val) +{ + unsigned int reg; + u32 mask; + + reg = UNIPHIER_AIDET_DETCONF + index / 32 * 4; + mask = BIT(index % 32); + + uniphier_aidet_reg_update(priv, reg, mask, val ? mask : 0); +} + +static int uniphier_aidet_irq_set_type(struct irq_data *data, unsigned int type) +{ + struct uniphier_aidet_priv *priv = data->chip_data; + unsigned int val = 0; + + /* enable inverter for active low triggers */ + switch (type) { + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_LEVEL_HIGH: + break; + case IRQ_TYPE_EDGE_FALLING: + val = 1; + type = IRQ_TYPE_EDGE_RISING; + break; + case IRQ_TYPE_LEVEL_LOW: + val = 1; + type = IRQ_TYPE_LEVEL_HIGH; + break; + default: + return -EINVAL; + } + + uniphier_aidet_detconf_update(priv, data->hwirq, val); + + return irq_chip_set_type_parent(data, type); +} + +static int uniphier_aidet_domain_translate(struct irq_domain *domain, + struct irq_fwspec *fwspec, + unsigned long *out_hwirq, + unsigned int *out_type) +{ + if (WARN_ON(fwspec->param_count < 2)) + return -EINVAL; + + *out_hwirq = fwspec->param[0]; + *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK; + + return 0; +} + +static int uniphier_aidet_domain_alloc(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs, + void *arg) +{ + struct uniphier_aidet_priv *priv = domain->host_data; + irq_hw_number_t hwirq; + unsigned int type; + int i, ret; + + ret = uniphier_aidet_domain_translate(domain, arg, &hwirq, &type); + if (ret) + return ret; + + if (hwirq >= UNIPHIER_AIDET_NR_IRQS) + return -ENXIO; + + for (i = 0; i < nr_irqs; i++) { + struct irq_fwspec parent_fwspec; + + ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, + &priv->chip, priv); + if (ret) + return ret; + + /* parent is GIC */ + parent_fwspec.fwnode = domain->parent->fwnode; + parent_fwspec.param_count = 3; + parent_fwspec.param[0] = 0; /* SPI */ + parent_fwspec.param[1] = hwirq - 32; + parent_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH; + + ret = irq_domain_alloc_irqs_parent(domain, virq, 1, + &parent_fwspec); + if (ret) + return ret; + + virq++; + hwirq++; + } + + return 0; +} + +static const struct irq_domain_ops uniphier_aidet_domain_ops = { + .alloc = uniphier_aidet_domain_alloc, + .free = irq_domain_free_irqs_common, + .translate = uniphier_aidet_domain_translate, +}; + +static int uniphier_aidet_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *parent_np; + struct irq_domain *parent_domain; + struct uniphier_aidet_priv *priv; + struct resource *res; + + parent_np = of_irq_find_parent(dev->of_node); + if (!parent_np) + return -ENXIO; + + parent_domain = irq_find_host(parent_np); + of_node_put(parent_np); + if (!parent_domain) + return -EPROBE_DEFER; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->reg_base = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->reg_base)) + return PTR_ERR(priv->reg_base); + + spin_lock_init(&priv->lock); + + priv->chip.name = dev_name(dev); + priv->chip.irq_mask = irq_chip_mask_parent; + priv->chip.irq_unmask = irq_chip_unmask_parent; + priv->chip.irq_eoi = irq_chip_eoi_parent; + priv->chip.irq_set_type = uniphier_aidet_irq_set_type; + + priv->domain = irq_domain_add_hierarchy(parent_domain, 0, + UNIPHIER_AIDET_NR_IRQS, + dev->of_node, + &uniphier_aidet_domain_ops, + priv); + if (!priv->domain) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + return 0; +} + +static int __maybe_unused uniphier_aidet_suspend(struct device *dev) +{ + struct uniphier_aidet_priv *priv = dev_get_drvdata(dev); + int i; + + for (i = 0; i < ARRAY_SIZE(priv->saved_vals); i++) + priv->saved_vals[i] = readl(priv->reg_base + + UNIPHIER_AIDET_DETCONF + i * 4); + + return 0; +} + +static int __maybe_unused uniphier_aidet_resume(struct device *dev) +{ + struct uniphier_aidet_priv *priv = dev_get_drvdata(dev); + int i; + + for (i = 0; i < ARRAY_SIZE(priv->saved_vals); i++) + writel(priv->saved_vals[i], + priv->reg_base + UNIPHIER_AIDET_DETCONF + i * 4); + + return 0; +} + +static const struct dev_pm_ops uniphier_aidet_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(uniphier_aidet_suspend, + uniphier_aidet_resume) +}; + +static const struct of_device_id uniphier_aidet_match[] = { + { .compatible = "socionext,uniphier-ld4-aidet" }, + { .compatible = "socionext,uniphier-pro4-aidet" }, + { .compatible = "socionext,uniphier-sld8-aidet" }, + { .compatible = "socionext,uniphier-pro5-aidet" }, + { .compatible = "socionext,uniphier-pxs2-aidet" }, + { .compatible = "socionext,uniphier-ld11-aidet" }, + { .compatible = "socionext,uniphier-ld20-aidet" }, + { .compatible = "socionext,uniphier-pxs3-aidet" }, + { /* sentinel */ } +}; + +static struct platform_driver uniphier_aidet_driver = { + .probe = uniphier_aidet_probe, + .driver = { + .name = "uniphier-aidet", + .of_match_table = uniphier_aidet_match, + .pm = &uniphier_aidet_pm_ops, + }, +}; +builtin_platform_driver(uniphier_aidet_driver);