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[34.38.134.32]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434da0d6961sm30318525e9.12.2024.12.05.09.41.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Dec 2024 09:41:40 -0800 (PST) From: Tudor Ambarus To: jassisinghbrar@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, alim.akhtar@samsung.com Cc: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, andre.draszik@linaro.org, kernel-team@android.com, willmcvicker@google.com, peter.griffin@linaro.org, Tudor Ambarus Subject: [PATCH v3 1/3] dt-bindings: mailbox: add bindings for samsung,exynos Date: Thu, 5 Dec 2024 17:41:35 +0000 Message-ID: <20241205174137.190545-2-tudor.ambarus@linaro.org> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog In-Reply-To: <20241205174137.190545-1-tudor.ambarus@linaro.org> References: <20241205174137.190545-1-tudor.ambarus@linaro.org> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add bindings for the Samsung Exynos Mailbox Controller. Signed-off-by: Tudor Ambarus --- .../bindings/mailbox/samsung,exynos.yaml | 70 +++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/samsung,exynos.yaml diff --git a/Documentation/devicetree/bindings/mailbox/samsung,exynos.yaml b/Documentation/devicetree/bindings/mailbox/samsung,exynos.yaml new file mode 100644 index 000000000000..1fddec1fc64c --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/samsung,exynos.yaml @@ -0,0 +1,70 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright 2024 Linaro Ltd. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/samsung,exynos.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung Exynos Mailbox Controller + +maintainers: + - Tudor Ambarus + +description: | + The samsung exynos mailbox controller has 16 flag bits for hardware interrupt + generation and a shared register for passing mailbox messages. When the + controller is used by the ACPM protocol the shared register is ignored and + the mailbox controller acts as a doorbell. The controller just raises the + interrupt to the firmware after the ACPM protocol has written the message to + SRAM. + +properties: + compatible: + const: google,gs101-acpm-mbox + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-names: + items: + - const: pclk + + interrupts: + description: IRQ line for the RX mailbox. + maxItems: 1 + + '#mbox-cells': + const: 1 + +required: + - compatible + - reg + - clocks + - clock-names + - interrupts + - '#mbox-cells' + +additionalProperties: false + +examples: + # Doorbell mode. + - | + #include + #include + + soc { + #address-cells = <1>; + #size-cells = <1>; + + ap2apm_mailbox: mailbox@17610000 { + compatible = "google,gs101-acpm-mbox"; + reg = <0x17610000 0x1000>; + clocks = <&cmu_apm CLK_GOUT_APM_MAILBOX_APM_AP_PCLK>; + clock-names = "pclk"; + interrupts = ; + #mbox-cells = <1>; + }; + }; From patchwork Thu Dec 5 17:41:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 847769 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C055A22579A for ; 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[34.38.134.32]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434da0d6961sm30318525e9.12.2024.12.05.09.41.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Dec 2024 09:41:41 -0800 (PST) From: Tudor Ambarus To: jassisinghbrar@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, alim.akhtar@samsung.com Cc: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, andre.draszik@linaro.org, kernel-team@android.com, willmcvicker@google.com, peter.griffin@linaro.org, Tudor Ambarus Subject: [PATCH v3 2/3] mailbox: add samsung exynos driver Date: Thu, 5 Dec 2024 17:41:36 +0000 Message-ID: <20241205174137.190545-3-tudor.ambarus@linaro.org> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog In-Reply-To: <20241205174137.190545-1-tudor.ambarus@linaro.org> References: <20241205174137.190545-1-tudor.ambarus@linaro.org> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The samsung exynos mailbox controller has 16 flag bits for hardware interrupt generation and a shared register for passing mailbox messages. When the controller is used by the ACPM protocol the shared register is ignored and the mailbox controller acts as a doorbell. The controller just raises the interrupt to APM after the ACPM protocol has written the message to SRAM. Add support for the samsung exynos mailbox controller. Signed-off-by: Tudor Ambarus --- drivers/mailbox/Kconfig | 11 +++ drivers/mailbox/Makefile | 2 + drivers/mailbox/exynos-mailbox.c | 143 +++++++++++++++++++++++++++++++ 3 files changed, 156 insertions(+) create mode 100644 drivers/mailbox/exynos-mailbox.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 8ecba7fb999e..44b808c4d97f 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -36,6 +36,17 @@ config ARM_MHU_V3 that provides different means of transports: supported extensions will be discovered and possibly managed at probe-time. +config EXYNOS_MBOX + tristate "Exynos Mailbox" + depends on ARCH_EXYNOS || COMPILE_TEST + help + Say Y here if you want to build the Samsung Exynos Mailbox controller + driver. The controller has 16 flag bits for hardware interrupt + generation and a shared register for passing mailbox messages. + When the controller is used by the ACPM protocol the shared register + is ignored and the mailbox controller acts as a doorbell that raises + the interrupt to the ACPM firmware. + config IMX_MBOX tristate "i.MX Mailbox" depends on ARCH_MXC || COMPILE_TEST diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 5f4f5b0ce2cc..86192b5c7c32 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -11,6 +11,8 @@ obj-$(CONFIG_ARM_MHU_V2) += arm_mhuv2.o obj-$(CONFIG_ARM_MHU_V3) += arm_mhuv3.o +obj-$(CONFIG_EXYNOS_MBOX) += exynos-mailbox.o + obj-$(CONFIG_IMX_MBOX) += imx-mailbox.o obj-$(CONFIG_ARMADA_37XX_RWTM_MBOX) += armada-37xx-rwtm-mailbox.o diff --git a/drivers/mailbox/exynos-mailbox.c b/drivers/mailbox/exynos-mailbox.c new file mode 100644 index 000000000000..6d4e9b3106b2 --- /dev/null +++ b/drivers/mailbox/exynos-mailbox.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2020 Samsung Electronics Co., Ltd. + * Copyright 2020 Google LLC. + * Copyright 2024 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define EXYNOS_MBOX_MCUCTRL 0x0 /* Mailbox Control Register */ +#define EXYNOS_MBOX_INTCR0 0x24 /* Interrupt Clear Register 0 */ +#define EXYNOS_MBOX_INTMR0 0x28 /* Interrupt Mask Register 0 */ +#define EXYNOS_MBOX_INTSR0 0x2c /* Interrupt Status Register 0 */ +#define EXYNOS_MBOX_INTMSR0 0x30 /* Interrupt Mask Status Register 0 */ +#define EXYNOS_MBOX_INTGR1 0x40 /* Interrupt Generation Register 1 */ +#define EXYNOS_MBOX_INTMR1 0x48 /* Interrupt Mask Register 1 */ +#define EXYNOS_MBOX_INTSR1 0x4c /* Interrupt Status Register 1 */ +#define EXYNOS_MBOX_INTMSR1 0x50 /* Interrupt Mask Status Register 1 */ + +#define EXYNOS_MBOX_INTMR0_MASK GENMASK(15, 0) +#define EXYNOS_MBOX_INTGR1_MASK GENMASK(15, 0) + +#define EXYNOS_MBOX_CHAN_COUNT HWEIGHT32(EXYNOS_MBOX_INTGR1_MASK) + +/** + * struct exynos_mbox - driver's private data. + * @regs: mailbox registers base address. + * @mbox: pointer to the mailbox controller. + * @dev: pointer to the mailbox device. + * @pclk: pointer to the mailbox peripheral clock. + */ +struct exynos_mbox { + void __iomem *regs; + struct mbox_controller *mbox; + struct device *dev; + struct clk *pclk; +}; + +static int exynos_mbox_chan_index(struct mbox_chan *chan) +{ + struct mbox_controller *mbox = chan->mbox; + int i; + + for (i = 0; i < mbox->num_chans; i++) + if (chan == &mbox->chans[i]) + return i; + return -EINVAL; +} + +static int exynos_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct exynos_mbox *exynos_mbox = dev_get_drvdata(chan->mbox->dev); + int index; + + index = exynos_mbox_chan_index(chan); + if (index < 0) + return index; + + writel_relaxed(BIT(index), exynos_mbox->regs + EXYNOS_MBOX_INTGR1); + + return 0; +} + +static const struct mbox_chan_ops exynos_mbox_chan_ops = { + .send_data = exynos_mbox_send_data, +}; + +static const struct of_device_id exynos_mbox_match[] = { + { .compatible = "google,gs101-acpm-mbox" }, + {}, +}; +MODULE_DEVICE_TABLE(of, exynos_mbox_match); + +static int exynos_mbox_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct exynos_mbox *exynos_mbox; + struct mbox_controller *mbox; + struct mbox_chan *chans; + int i; + + exynos_mbox = devm_kzalloc(dev, sizeof(*exynos_mbox), GFP_KERNEL); + if (!exynos_mbox) + return -ENOMEM; + + mbox = devm_kzalloc(dev, sizeof(*mbox), GFP_KERNEL); + if (!mbox) + return -ENOMEM; + + chans = devm_kcalloc(dev, EXYNOS_MBOX_CHAN_COUNT, sizeof(*chans), + GFP_KERNEL); + if (!chans) + return -ENOMEM; + + exynos_mbox->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(exynos_mbox->regs)) + return PTR_ERR(exynos_mbox->regs); + + exynos_mbox->pclk = devm_clk_get_enabled(dev, "pclk"); + if (IS_ERR(exynos_mbox->pclk)) + return dev_err_probe(dev, PTR_ERR(exynos_mbox->pclk), + "Failed to enable clock.\n"); + + mbox->num_chans = EXYNOS_MBOX_CHAN_COUNT; + mbox->chans = chans; + mbox->dev = dev; + mbox->ops = &exynos_mbox_chan_ops; + + for (i = 0; i < EXYNOS_MBOX_CHAN_COUNT; i++) + chans[i].mbox = mbox; + + exynos_mbox->dev = dev; + exynos_mbox->mbox = mbox; + + platform_set_drvdata(pdev, exynos_mbox); + + /* Mask out all interrupts. We support just polling channels for now. */ + writel_relaxed(EXYNOS_MBOX_INTMR0_MASK, + exynos_mbox->regs + EXYNOS_MBOX_INTMR0); + + return devm_mbox_controller_register(dev, mbox); +} + +static struct platform_driver exynos_mbox_driver = { + .probe = exynos_mbox_probe, + .driver = { + .name = "exynos-acpm-mbox", + .of_match_table = of_match_ptr(exynos_mbox_match), + }, +}; +module_platform_driver(exynos_mbox_driver); + +MODULE_AUTHOR("Tudor Ambarus "); +MODULE_DESCRIPTION("Exynos mailbox driver"); +MODULE_LICENSE("GPL"); From patchwork Thu Dec 5 17:41:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 848040 Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E73B227B81 for ; Thu, 5 Dec 2024 17:41:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733420507; cv=none; b=cftZZuiCc6CjmM15alCIV1rwmKojkuWzwp3X8I+2Wu+1cYaWzctzPbwMMwOuaQkPFwbaCrFs1QCWuvk9aZznxc/MRCjgx2qv67LqDlUgcEUv9zBPOlse//OKnWROf8Uy2uKfUaVbjzRBNo2aoWBADjm6bD/SE3+pLHPSi6uTxCM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733420507; c=relaxed/simple; bh=xXPiygVHodTqiKWiUOsE0uULVZtvJJ1/Xa366WcUIss=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=heNGulgB8YKNB784uxoIXxF649TWi7eW4LB65R9J50ochSzb41BZ+4y4s8Po4hAyt6nC+Pz88vJ0jzdBVBBhWiSQ2IRjj6TVvNr1lBHstkLzOJ8YMIgE2upVu8DG5FWLDhocsSjjM4do/pVIhGKGSI+DdnkbWK00qL+qKpqA2dw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=hoCyBSCU; arc=none smtp.client-ip=209.85.128.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="hoCyBSCU" Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-4349e1467fbso8603965e9.1 for ; Thu, 05 Dec 2024 09:41:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1733420503; x=1734025303; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jKhrlzK7pKMmsPY9TXNGvHHUZJEtDgIZ1kDt6TVOg0Y=; b=hoCyBSCUaa7B5i+frE52rQ8fgIzcpSk8Koqxe5fuGzIXJBy1emI+qFfO+8l3dS4i1A HeJSYgZ/RP8ibDf4Qrjn+8tQ3IKCc92UQqk1XwMGT5KBcXt2n7fL/txkL4Y8+xDi2825 hi5ElMVngRN9O8TgOEq+S68vSSchHUiwO/Mry9A6q4+ztnki3sl7o2e3t6g4dQnPEokG XrxfAkxpzxaycP5G3bD9pUqYAXJDVYW5Jsf4XzXuZt9/vYFEBwdak42HVeu7q/TRRquE /zJ+hxLR9ZzVmQX2J0zdB2Tk1CqwZuZ5eOMW6h1lKGWCzFrwQa8l8d3Txl/xYAhVyguU uB5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733420503; x=1734025303; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jKhrlzK7pKMmsPY9TXNGvHHUZJEtDgIZ1kDt6TVOg0Y=; b=GjvJXTrc02UywYdeCNFUhoY2+4N01o9VEYtPsg8N9t2hIjzaR8Yo1sc/ihHG3gjA1y pv6xzMSBnSpTHxtutNG7QvA4VoWWDvF7NZAU8VA7KWWxBTBrNgWsN4RtsBe7CUYGrcRe ngMiaNHpDPF0pIPI0DMRpedhGmhx1s7LLsYKnSoQveIP+d1Ly5mEUVuUEdJCrKE1M9m+ JJhBmic8uIZAJYo9jmHjrRRJfSueWts2v9xXdQpSpT+/6XXYuZ9D91DE6UMXdtBzAerH 5Sz+M2g+xbaqK/cEdMwdyOVj5Q5tDKIG7utNBKN6ty2w1srNNHbQGYZNrH0/khIyEIDP 8/og== X-Forwarded-Encrypted: i=1; AJvYcCXNieyjXZa+7aUdOV174QA0iEMLb8rL5qLnJ2LJykyzT9hLJ6eEXsJ9D3RpAKSa6RBsJ8diz/pTn5Q9t3NWVp2zgg==@vger.kernel.org X-Gm-Message-State: AOJu0YzYxkvkrQ6uHTlx2zJ8o/LzXoVCoSCizY4LhYds6MCIBOD76iLD d4Thrjurc/qGKNycm/w46IaVhk0i67fIe5yIfa4eqQozITwJvKq1MgiB/9gsjH4= X-Gm-Gg: ASbGncsH2j3uq8wV6lGWywJ+reI6ADQnD8QyJ1Lx4W03q+6YogkCSsUEyO9IDubTGM9 UqKDEj/NuyHn4Jr/RQK7UgjimTNp7mweZ2nfbK5OKxUSrD/K4UzskI2c6ExYYjubnRBW9uEFJ3U +Z1NdOB4uiMCzVlcFBsz9F9oPF244IqvNGoPjNC7lTz8I3KFJjMwRHu+kKSp0FB91Kj5l2uzCyd pzOkV/zqtwONtM+1JRovI98awOibFYjeQj6qeJRh4Li1L20m1SlZrhiopF2T5U+TeszTWDsPE6a +Fb7rkdPwXceoxdzFUjGKwSmNwZr63xX X-Google-Smtp-Source: AGHT+IETTIMwCAt1THUCSfAIoi1qf9ZFSIPgjGWfgvAXtjPszoHVRLgp6w2ts+qYW08bZrcEVzFXEQ== X-Received: by 2002:a05:600c:350a:b0:434:a7e3:db66 with SMTP id 5b1f17b1804b1-434ddecfe72mr1375775e9.26.1733420502746; Thu, 05 Dec 2024 09:41:42 -0800 (PST) Received: from ta2.c.googlers.com.com (32.134.38.34.bc.googleusercontent.com. [34.38.134.32]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434da0d6961sm30318525e9.12.2024.12.05.09.41.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Dec 2024 09:41:42 -0800 (PST) From: Tudor Ambarus To: jassisinghbrar@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, alim.akhtar@samsung.com Cc: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, andre.draszik@linaro.org, kernel-team@android.com, willmcvicker@google.com, peter.griffin@linaro.org, Tudor Ambarus Subject: [PATCH v3 3/3] MAINTAINERS: add entry for samsung exynos mailbox driver Date: Thu, 5 Dec 2024 17:41:37 +0000 Message-ID: <20241205174137.190545-4-tudor.ambarus@linaro.org> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog In-Reply-To: <20241205174137.190545-1-tudor.ambarus@linaro.org> References: <20241205174137.190545-1-tudor.ambarus@linaro.org> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add entry for the samsung exynos mailbox driver. Signed-off-by: Tudor Ambarus --- MAINTAINERS | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 1e930c7a58b1..41a29d1d6e4d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3023,6 +3023,7 @@ F: drivers/*/*s3c24* F: drivers/*/*s3c64xx* F: drivers/*/*s5pv210* F: drivers/clocksource/samsung_pwm_timer.c +F: drivers/mailbox/exynos-mailbox.c F: drivers/memory/samsung/ F: drivers/pwm/pwm-samsung.c F: drivers/soc/samsung/ @@ -20712,6 +20713,14 @@ F: arch/arm64/boot/dts/exynos/exynos850* F: drivers/clk/samsung/clk-exynos850.c F: include/dt-bindings/clock/exynos850.h +SAMSUNG EXYNOS MAILBOX DRIVER +M: Tudor Ambarus +L: linux-kernel@vger.kernel.org +L: linux-samsung-soc@vger.kernel.org +S: Supported +F: Documentation/devicetree/bindings/mailbox/samsung,exynos.yaml +F: drivers/mailbox/exynos-mailbox.c + SAMSUNG EXYNOS PSEUDO RANDOM NUMBER GENERATOR (RNG) DRIVER M: Krzysztof Kozlowski L: linux-crypto@vger.kernel.org