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Tue, 18 Aug 2020 19:42:46 -0800 Received: from MTKMBS06N1.mediatek.inc (172.21.101.129) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 18 Aug 2020 20:42:44 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs06n1.mediatek.inc (172.21.101.129) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 19 Aug 2020 11:42:43 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 19 Aug 2020 11:42:39 +0800 From: Mark-PK Tsai To: Subject: [PATCH 1/2] irqchip: irq-mst: Add MStar interrupt controller support Date: Wed, 19 Aug 2020 11:42:30 +0800 Message-ID: <20200819034231.20726-2-mark-pk.tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200819034231.20726-1-mark-pk.tsai@mediatek.com> References: <20200819034231.20726-1-mark-pk.tsai@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200818_234252_569545_85B3A1CC X-CRM114-Status: GOOD ( 23.36 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, alix.wu@mediatek.com, jason@lakedaemon.net, yj.chiang@mediatek.com, daniel@0x0f.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, matthias.bgg@gmail.com, tglx@linutronix.de, mark-pk.tsai@mediatek.com Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org Add MStar interrupt controller support using hierarchy irq domain. Signed-off-by: Mark-PK Tsai --- drivers/irqchip/Kconfig | 7 ++ drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-mst-intc.c | 195 +++++++++++++++++++++++++++++++++ 3 files changed, 203 insertions(+) create mode 100644 drivers/irqchip/irq-mst-intc.c diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index bb70b7177f94..c3a9d880a4ea 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -571,4 +571,11 @@ config LOONGSON_PCH_MSI help Support for the Loongson PCH MSI Controller. +config MST_IRQ + bool "MStar Interrupt Controller" + select IRQ_DOMAIN + select IRQ_DOMAIN_HIERARCHY + help + Support MStar Interrupt Controller. + endmenu diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 133f9c45744a..e2688a62403e 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -111,3 +111,4 @@ obj-$(CONFIG_LOONGSON_HTPIC) += irq-loongson-htpic.o obj-$(CONFIG_LOONGSON_HTVEC) += irq-loongson-htvec.o obj-$(CONFIG_LOONGSON_PCH_PIC) += irq-loongson-pch-pic.o obj-$(CONFIG_LOONGSON_PCH_MSI) += irq-loongson-pch-msi.o +obj-$(CONFIG_MST_IRQ) += irq-mst-intc.o diff --git a/drivers/irqchip/irq-mst-intc.c b/drivers/irqchip/irq-mst-intc.c new file mode 100644 index 000000000000..38d567741860 --- /dev/null +++ b/drivers/irqchip/irq-mst-intc.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) +/* + * Copyright (c) 2020 MediaTek Inc. + * Author Mark-PK Tsai + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define INTC_MASK 0x0 +#define INTC_EOI 0x20 + +struct mst_intc_chip_data { + raw_spinlock_t lock; + unsigned int irq_start, nr_irqs; + void __iomem *base; + bool no_eoi; +}; + +static void mst_poke_irq(struct irq_data *d, u32 offset) +{ + irq_hw_number_t hwirq = irqd_to_hwirq(d); + struct mst_intc_chip_data *cd = irq_data_get_irq_chip_data(d); + u16 val, mask; + + mask = 1 << (hwirq % 16); + offset += (hwirq / 16) * 4; + + raw_spin_lock(&cd->lock); + val = readw_relaxed(cd->base + offset) | mask; + writew_relaxed(val, cd->base + offset); + raw_spin_unlock(&cd->lock); +} + +static void mst_clear_irq(struct irq_data *d, u32 offset) +{ + irq_hw_number_t hwirq = irqd_to_hwirq(d); + struct mst_intc_chip_data *cd = irq_data_get_irq_chip_data(d); + u16 val, mask; + + mask = 1 << (hwirq % 16); + offset += (hwirq / 16) * 4; + + raw_spin_lock(&cd->lock); + val = readw_relaxed(cd->base + offset) & ~mask; + writew_relaxed(val, cd->base + offset); + raw_spin_unlock(&cd->lock); +} + +static void mst_intc_mask_irq(struct irq_data *d) +{ + mst_poke_irq(d, INTC_MASK); + irq_chip_mask_parent(d); +} + +static void mst_intc_unmask_irq(struct irq_data *d) +{ + mst_clear_irq(d, INTC_MASK); + irq_chip_unmask_parent(d); +} + +static void mst_intc_eoi_irq(struct irq_data *d) +{ + struct mst_intc_chip_data *cd = irq_data_get_irq_chip_data(d); + + if (!cd->no_eoi) + mst_poke_irq(d, INTC_EOI); + + irq_chip_eoi_parent(d); +} + +static struct irq_chip mst_intc_chip = { + .name = "mst-intc", + .irq_mask = mst_intc_mask_irq, + .irq_unmask = mst_intc_unmask_irq, + .irq_eoi = mst_intc_eoi_irq, + .irq_get_irqchip_state = irq_chip_get_parent_state, + .irq_set_irqchip_state = irq_chip_set_parent_state, + .irq_set_affinity = irq_chip_set_affinity_parent, + .irq_set_vcpu_affinity = irq_chip_set_vcpu_affinity_parent, + .irq_set_type = irq_chip_set_type_parent, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .flags = IRQCHIP_SET_TYPE_MASKED | + IRQCHIP_SKIP_SET_WAKE | + IRQCHIP_MASK_ON_SUSPEND, +}; + +static int mst_intc_domain_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + if (is_of_node(fwspec->fwnode)) { + if (fwspec->param_count != 3) + return -EINVAL; + + /* No PPI should point to this domain */ + if (fwspec->param[0] != 0) + return -EINVAL; + + *hwirq = fwspec->param[1]; + *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; + return 0; + } + + return -EINVAL; +} + +static int mst_intc_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *data) +{ + int i; + irq_hw_number_t hwirq; + struct irq_fwspec parent_fwspec, *fwspec = data; + struct mst_intc_chip_data *cd = (struct mst_intc_chip_data *)domain->host_data; + + /* Not GIC compliant */ + if (fwspec->param_count != 3) + return -EINVAL; + + /* No PPI should point to this domain */ + if (fwspec->param[0]) + return -EINVAL; + + if (fwspec->param[1] >= cd->nr_irqs) + return -EINVAL; + + hwirq = fwspec->param[1]; + for (i = 0; i < nr_irqs; i++) + irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i, + &mst_intc_chip, + domain->host_data); + + parent_fwspec = *fwspec; + parent_fwspec.fwnode = domain->parent->fwnode; + parent_fwspec.param[1] = cd->irq_start + hwirq; + return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_fwspec); +} + +static const struct irq_domain_ops mst_intc_domain_ops = { + .translate = mst_intc_domain_translate, + .alloc = mst_intc_domain_alloc, + .free = irq_domain_free_irqs_common, +}; + +int __init +mst_intc_of_init(struct device_node *dn, struct device_node *parent) +{ + struct irq_domain *domain, *domain_parent; + struct mst_intc_chip_data *cd; + unsigned int irq_start, irq_end; + + domain_parent = irq_find_host(parent); + if (!domain_parent) { + pr_err("mst-intc: interrupt-parent not found\n"); + return -EINVAL; + } + + if (of_property_read_u32_index(dn, "mstar,irqs-map-range", 0, &irq_start) || + of_property_read_u32_index(dn, "mstar,irqs-map-range", 1, &irq_end)) + return -EINVAL; + + cd = kzalloc(sizeof(*cd), GFP_KERNEL); + if (!cd) + return -ENOMEM; + + cd->base = of_iomap(dn, 0); + if (!cd->base) { + kfree(cd); + return -ENOMEM; + } + + cd->no_eoi = of_property_read_bool(dn, "mstar,intc-no-eoi"); + raw_spin_lock_init(&cd->lock); + cd->irq_start = irq_start; + cd->nr_irqs = irq_end - irq_start + 1; + domain = irq_domain_add_hierarchy(domain_parent, 0, cd->nr_irqs, dn, + &mst_intc_domain_ops, cd); + if (!domain) { + iounmap(cd->base); + kfree(cd); + return -ENOMEM; + } + + return 0; +} + +IRQCHIP_DECLARE(mst_intc, "mstar,mst-intc", mst_intc_of_init); From patchwork Wed Aug 19 03:42:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark-PK Tsai X-Patchwork-Id: 11722475 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2D375739 for ; Wed, 19 Aug 2020 03:51:46 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 06E122078B for ; Wed, 19 Aug 2020 03:51:45 +0000 (UTC) Authentication-Results: mail.kernel.org; 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b=RfSu+rcZUd3Cub/Xyz1jxH+TTd6MqM4ZtiXa3/zxdvv76GbCWgR25ZQ35bQz/wG0L+4OInFwm6XTG7K1ADSxbeQYBv0hhl/4SsyVGEOuGarLMt9RlMQKbKO4hmOFIo0lRk//LBHrIkXyvEBCXtrg30LGtwwra3NtPjCdbSLVEC4=; X-UUID: 1e36a9f7fb594d59abcaff7e16aa9929-20200818 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 865665168; Tue, 18 Aug 2020 19:51:33 -0800 Received: from mtkmbs05n2.mediatek.inc (172.21.101.140) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 18 Aug 2020 20:42:45 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs05n2.mediatek.inc (172.21.101.140) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 19 Aug 2020 11:42:43 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 19 Aug 2020 11:42:40 +0800 From: Mark-PK Tsai To: Subject: [PATCH 2/2] dt-bindings: interrupt-controller: Add MStar interrupt controller Date: Wed, 19 Aug 2020 11:42:31 +0800 Message-ID: <20200819034231.20726-3-mark-pk.tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200819034231.20726-1-mark-pk.tsai@mediatek.com> References: <20200819034231.20726-1-mark-pk.tsai@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200818_235138_377336_E1883A5A X-CRM114-Status: GOOD ( 15.95 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, alix.wu@mediatek.com, jason@lakedaemon.net, yj.chiang@mediatek.com, daniel@0x0f.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, matthias.bgg@gmail.com, tglx@linutronix.de, mark-pk.tsai@mediatek.com Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org Add binding for MStar interrupt controller. Signed-off-by: Mark-PK Tsai --- .../interrupt-controller/mstar,mst-intc.yaml | 82 +++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/mstar,mst-intc.yaml diff --git a/Documentation/devicetree/bindings/interrupt-controller/mstar,mst-intc.yaml b/Documentation/devicetree/bindings/interrupt-controller/mstar,mst-intc.yaml new file mode 100644 index 000000000000..6e383315e529 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/mstar,mst-intc.yaml @@ -0,0 +1,82 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/interrupt-controller/mstar,mst-intc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MStar Interrupt Controller + +maintainers: + - Mark-PK Tsai + +description: |+ + MStar, SigmaStar and Mediatek DTV SoCs contain multiple legacy + interrupt controllers that routes interrupts to the GIC. + + The HW block exposes a number of interrupt controllers, each + can support up to 64 interrupts. + +allOf: + - $ref: /schemas/interrupt-controller.yaml# + +properties: + compatible: + items: + - const: mstar,mst-intc + - enum: + - mediatek,mt58xx-intc + + interrupt-controller: true + + "#address-cells": + enum: [ 0, 1, 2 ] + + "#size-cells": + enum: [ 1, 2 ] + + "#interrupt-cells": + const: 3 + description: | + Use the same format as specified by GIC in arm,gic.yaml. + + reg: + description: | + Physical base address of the mstar interrupt controller + registers and length of memory mapped region. + minItems: 1 + + mstar,irqs-map-range: + description: | + The range of parent interrupt controller's interrupt lines + that are hardwired to mstar interrupt controller. + $ref: /schemas/types.yaml#/definitions/uint32-matrix + items: + minItems: 2 + maxItems: 2 + + mstar,intc-no-eoi: + description: | + Mark this controller has no End Of Interrupt(EOI) implementation. + This is a empty, boolean property. + type: boolean + +required: + - compatible + - reg + - mstar,irqs-map-range + +additionalProperties: false + +examples: + - | + mst_intc0: interrupt-controller@1f2032d0 { + compatible = "mstar,mst-intc", "mediatek,mt58xx-intc"; + interrupt-controller; + #interrupt-cells = <3>; + #address-cells = <1>; + #size-cells = <1>; + interrupt-parent = <&gic>; + reg = <0x1f2032d0 0x30>; + mstar,irqs-map-range = <0 63>; + }; +...