From patchwork Wed Dec 1 07:56:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allen-KH Cheng X-Patchwork-Id: 12649467 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 766C3C433F5 for ; Wed, 1 Dec 2021 07:57:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aYOod0ivCLLPD0NCxJ1NtGLGbP+Bnfp+HoSjiTM3T2A=; b=gRRHVLMr31jode 3NKm7T988u+wqz6x94u39qH05K21df19UuLkwBiAp7WJAaKC9NbOSOnj1rGK774X9Jbr9deCYQeMZ OhRWW5rK/PESOsiunh5VE82ObuxjDreubqk4wDQf0Lx/XAZJP1Xyxq8ogKLQi5SZddFPgg+OUpu2V 6pcd4+evjS1jx+h56CO/iAuYtztfKdlQOhcJapU1tt96tYIzDFA3umPxe86S4Ma1Bb0RxM079aMIW J2k1Qj7LSzp0HHe66kvEXW7lSnCvJaANOO4niL/5pzbOnNSjZrhyvkRjcMiEHJFBdght0pl2t6J63 rXatdSNJQotGNZNpQGyQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1msKU3-007jrD-DL; Wed, 01 Dec 2021 07:56:55 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1msKTW-007jh1-Ke; Wed, 01 Dec 2021 07:56:24 +0000 X-UUID: 12f888b8481748829149a95f34f10810-20211201 X-UUID: 12f888b8481748829149a95f34f10810-20211201 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1985168894; Wed, 01 Dec 2021 00:56:15 -0700 Received: from mtkexhb02.mediatek.inc (172.21.101.103) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 30 Nov 2021 23:56:14 -0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkexhb02.mediatek.inc (172.21.101.103) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 1 Dec 2021 15:56:07 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 1 Dec 2021 15:56:07 +0800 From: allen-kh.cheng To: Mark Brown , Rob Herring , Matthias Brugger , Jassi Brar CC: Linux-ALSA , , , Pierre-Louis Bossart , Liam Girdwood , Ranjani Sridharan , Kai Vehmanen , Daniel Baluta , Jaroslav Kysela , Takashi Iwai , , , , , , , Allen-KH Cheng Subject: [PATCH v9 1/3] dt-bindings: mediatek: add adsp-mbox document Date: Wed, 1 Dec 2021 15:56:02 +0800 Message-ID: <20211201075604.27864-2-allen-kh.cheng@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20211201075604.27864-1-allen-kh.cheng@mediatek.com> References: <20211201075604.27864-1-allen-kh.cheng@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-20211130_235622_725677_1355E0BD X-CRM114-Status: GOOD ( 14.26 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Allen-KH Cheng This patch adds document for mediatek adsp mbox Signed-off-by: Allen-KH Cheng --- .../bindings/mailbox/mtk,adsp-mbox.yaml | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml diff --git a/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml new file mode 100644 index 000000000000..25756837797f --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/mtk,adsp-mbox.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Mediatek ADSP mailbox + +maintainers: + - Allen-KH Cheng + +description: | + The MTK ADSP mailbox Inter-Processor Communication (IPC) enables the SoC + to ommunicate with ADSP by passing messages through two mailbox channels. + The MTK ADSP mailbox IPC also provides the ability for one processor to + signal the other processor using interrupts. + +properties: + compatible: + items: + - const: mediatek,mt8195-adsp-mbox + + "#mbox-cells": + const: 0 + + reg: + description: + Physical address base for dsp mbox registers. + + interrupts: + description: + adsp mbox interrupt + +required: + - compatible + - "#mbox-cells" + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include + #include + + adsp_mailbox0:mailbox@10816000 { + compatible = "mediatek,mt8195-adsp-mbox"; + #mbox-cells = <0>; + reg = <0x10816000 0x1000>; + interrupts = ; + }; From patchwork Wed Dec 1 07:56:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allen-KH Cheng X-Patchwork-Id: 12649465 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 36F03C433EF for ; Wed, 1 Dec 2021 07:56:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Wed, 01 Dec 2021 00:56:11 -0700 Received: from mtkmbs10n1.mediatek.inc (172.21.101.34) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 30 Nov 2021 23:56:09 -0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Wed, 1 Dec 2021 15:56:08 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 1 Dec 2021 15:56:07 +0800 From: allen-kh.cheng To: Mark Brown , Rob Herring , Matthias Brugger , Jassi Brar CC: Linux-ALSA , , , Pierre-Louis Bossart , Liam Girdwood , Ranjani Sridharan , Kai Vehmanen , Daniel Baluta , Jaroslav Kysela , Takashi Iwai , , , , , , , Allen-KH Cheng Subject: [PATCH v9 2/3] firmware: mediatek: add adsp ipc protocol interface Date: Wed, 1 Dec 2021 15:56:03 +0800 Message-ID: <20211201075604.27864-3-allen-kh.cheng@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20211201075604.27864-1-allen-kh.cheng@mediatek.com> References: <20211201075604.27864-1-allen-kh.cheng@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-20211130_235614_632946_6E57BC4B X-CRM114-Status: GOOD ( 26.13 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Allen-KH Cheng Some of mediatek processors contain the Tensilica HiFix DSP for audio processing. The communication between Host CPU and DSP firmware is taking place using a shared memory area for message passing. ADSP IPC protocol offers (send/recv) interfaces using mediatek-mailbox APIs. We use two mbox channels to implement a request-reply protocol. Signed-off-by: Allen-KH Cheng Reviewed-by: Tzung-Bi Shih --- drivers/firmware/Kconfig | 1 + drivers/firmware/Makefile | 1 + drivers/firmware/mediatek/Kconfig | 9 ++ drivers/firmware/mediatek/Makefile | 2 + drivers/firmware/mediatek/mtk-adsp-ipc.c | 135 ++++++++++++++++++ .../linux/firmware/mediatek/mtk-adsp-ipc.h | 65 +++++++++ 6 files changed, 213 insertions(+) create mode 100644 drivers/firmware/mediatek/Kconfig create mode 100644 drivers/firmware/mediatek/Makefile create mode 100644 drivers/firmware/mediatek/mtk-adsp-ipc.c create mode 100644 include/linux/firmware/mediatek/mtk-adsp-ipc.h diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 220a58cf0a44..005f76a9a31a 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -301,6 +301,7 @@ source "drivers/firmware/broadcom/Kconfig" source "drivers/firmware/google/Kconfig" source "drivers/firmware/efi/Kconfig" source "drivers/firmware/imx/Kconfig" +source "drivers/firmware/mediatek/Kconfig" source "drivers/firmware/meson/Kconfig" source "drivers/firmware/psci/Kconfig" source "drivers/firmware/smccc/Kconfig" diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile index 5ced0673d94b..c0d1f3bdeae4 100644 --- a/drivers/firmware/Makefile +++ b/drivers/firmware/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_GOOGLE_FIRMWARE) += google/ obj-$(CONFIG_EFI) += efi/ obj-$(CONFIG_UEFI_CPER) += efi/ obj-y += imx/ +obj-y += mediatek/ obj-y += psci/ obj-y += smccc/ obj-y += tegra/ diff --git a/drivers/firmware/mediatek/Kconfig b/drivers/firmware/mediatek/Kconfig new file mode 100644 index 000000000000..6d1e580b967b --- /dev/null +++ b/drivers/firmware/mediatek/Kconfig @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +config MTK_ADSP_IPC + tristate "MTK ADSP IPC Protocol driver" + depends on MTK_ADSP_MBOX + help + Say yes here to add support for the MediaTek ADSP IPC + between host AP (Linux) and the firmware running on ADSP. + ADSP exists on some mtk processors. + Client might use shared memory to exchange information with ADSP side. diff --git a/drivers/firmware/mediatek/Makefile b/drivers/firmware/mediatek/Makefile new file mode 100644 index 000000000000..4e840b65650d --- /dev/null +++ b/drivers/firmware/mediatek/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_MTK_ADSP_IPC) += mtk-adsp-ipc.o diff --git a/drivers/firmware/mediatek/mtk-adsp-ipc.c b/drivers/firmware/mediatek/mtk-adsp-ipc.c new file mode 100644 index 000000000000..49da06590612 --- /dev/null +++ b/drivers/firmware/mediatek/mtk-adsp-ipc.c @@ -0,0 +1,135 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2021 MediaTek Corporation. All rights reserved. + * Author: Allen-KH Cheng + */ + +#include +#include +#include +#include +#include +#include +#include + +int mtk_adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t msg) +{ + struct mtk_adsp_chan *dsp_chan; + int ret; + + if (idx >= MTK_ADSP_MBOX_NUM) + return -EINVAL; + + dsp_chan = &ipc->chans[idx]; + ret = mbox_send_message(dsp_chan->ch, &msg); + if (ret < 0) + return ret; + + return 0; +} +EXPORT_SYMBOL(mtk_adsp_ipc_send); + +static void mtk_adsp_ipc_recv(struct mbox_client *c, void *msg) +{ + struct mtk_adsp_chan *chan = container_of(c, struct mtk_adsp_chan, cl); + + switch (chan->idx) { + case MTK_ADSP_MBOX_REPLY: + chan->ipc->ops->handle_reply(chan->ipc); + break; + case MTK_ADSP_MBOX_REQUEST: + chan->ipc->ops->handle_request(chan->ipc); + break; + default: + break; + } +} + +static int mtk_adsp_ipc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_adsp_ipc *dsp_ipc; + struct mtk_adsp_chan *dsp_chan; + struct mbox_client *cl; + char *chan_name; + int ret; + int i, j; + + device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent); + + dsp_ipc = devm_kzalloc(dev, sizeof(*dsp_ipc), GFP_KERNEL); + if (!dsp_ipc) + return -ENOMEM; + + for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) { + chan_name = kasprintf(GFP_KERNEL, "mbox%d", i); + if (!chan_name) { + ret = -ENOMEM; + goto out; + } + + dsp_chan = &dsp_ipc->chans[i]; + cl = &dsp_chan->cl; + cl->dev = dev->parent; + cl->tx_block = false; + cl->knows_txdone = false; + cl->tx_prepare = NULL; + cl->rx_callback = mtk_adsp_ipc_recv; + + dsp_chan->ipc = dsp_ipc; + dsp_chan->idx = i; + dsp_chan->ch = mbox_request_channel_byname(cl, chan_name); + if (IS_ERR(dsp_chan->ch)) { + ret = PTR_ERR(dsp_chan->ch); + if (ret != -EPROBE_DEFER) + dev_err(dev, "Failed to request mbox chan %d ret %d\n", + i, ret); + goto out; + } + + dev_dbg(dev, "request mbox chan %s\n", chan_name); + kfree(chan_name); + } + + dsp_ipc->dev = dev; + dev_set_drvdata(dev, dsp_ipc); + dev_dbg(dev, "MTK ADSP IPC initialized\n"); + + return 0; + +out: + kfree(chan_name); + for (j = 0; j < i; j++) { + dsp_chan = &dsp_ipc->chans[j]; + mbox_free_channel(dsp_chan->ch); + } + + return ret; +} + +static int mtk_adsp_ipc_remove(struct platform_device *pdev) +{ + struct mtk_adsp_ipc *dsp_ipc = dev_get_drvdata(&pdev->dev); + struct mtk_adsp_chan *dsp_chan; + int i; + + for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) { + dsp_chan = &dsp_ipc->chans[i]; + mbox_free_channel(dsp_chan->ch); + } + + return 0; +} + +static struct platform_driver mtk_adsp_ipc_driver = { + .driver = { + .name = "mtk-adsp-ipc", + }, + .probe = mtk_adsp_ipc_probe, + .remove = mtk_adsp_ipc_remove, +}; +builtin_platform_driver(mtk_adsp_ipc_driver); + +MODULE_AUTHOR("Allen-KH Cheng "); +MODULE_DESCRIPTION("MTK ADSP IPC Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/firmware/mediatek/mtk-adsp-ipc.h b/include/linux/firmware/mediatek/mtk-adsp-ipc.h new file mode 100644 index 000000000000..08e3c7d3b405 --- /dev/null +++ b/include/linux/firmware/mediatek/mtk-adsp-ipc.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2021 MediaTek Inc. + */ + +#ifndef MTK_ADSP_IPC_H +#define MTK_ADSP_IPC_H + +#include +#include +#include +#include + +#define MTK_ADSP_IPC_REQ 0 +#define MTK_ADSP_IPC_RSP 1 +#define MTK_ADSP_IPC_OP_REQ 0x1 +#define MTK_ADSP_IPC_OP_RSP 0x2 + +enum { + MTK_ADSP_MBOX_REPLY, + MTK_ADSP_MBOX_REQUEST, + MTK_ADSP_MBOX_NUM, +}; + +struct mtk_adsp_ipc; + +struct mtk_adsp_ipc_ops { + void (*handle_reply)(struct mtk_adsp_ipc *ipc); + void (*handle_request)(struct mtk_adsp_ipc *ipc); +}; + +struct mtk_adsp_chan { + struct mtk_adsp_ipc *ipc; + struct mbox_client cl; + struct mbox_chan *ch; + char *name; + int idx; +}; + +struct mtk_adsp_ipc { + struct mtk_adsp_chan chans[MTK_ADSP_MBOX_NUM]; + struct device *dev; + struct mtk_adsp_ipc_ops *ops; + void *private_data; +}; + +static inline void mtk_adsp_ipc_set_data(struct mtk_adsp_ipc *ipc, void *data) +{ + if (!ipc) + return; + + ipc->private_data = data; +} + +static inline void *mtk_adsp_ipc_get_data(struct mtk_adsp_ipc *ipc) +{ + if (!ipc) + return NULL; + + return ipc->private_data; +} + +int mtk_adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t op); + +#endif /* MTK_ADSP_IPC_H */ From patchwork Wed Dec 1 07:56:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allen-KH Cheng X-Patchwork-Id: 12649469 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7DA9BC433EF for ; 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Wed, 1 Dec 2021 15:56:12 +0800 From: allen-kh.cheng To: Mark Brown , Rob Herring , Matthias Brugger , Jassi Brar CC: Linux-ALSA , , , Pierre-Louis Bossart , Liam Girdwood , Ranjani Sridharan , Kai Vehmanen , Daniel Baluta , Jaroslav Kysela , Takashi Iwai , , , , , , , Allen-KH Cheng Subject: [PATCH v9 3/3] mailbox: mediatek: add support for adsp mailbox controller Date: Wed, 1 Dec 2021 15:56:04 +0800 Message-ID: <20211201075604.27864-4-allen-kh.cheng@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20211201075604.27864-1-allen-kh.cheng@mediatek.com> References: <20211201075604.27864-1-allen-kh.cheng@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-20211130_235622_725141_8A306164 X-CRM114-Status: GOOD ( 22.87 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Allen-KH Cheng This patch is to for MediaTek ADSP IPC mailbox controller driver It is used to send short messages between processors with adsp Signed-off-by: Allen-KH Cheng Reviewed-by: Tzung-Bi Shih --- drivers/mailbox/Kconfig | 7 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mtk-adsp-mailbox.c | 176 +++++++++++++++++++++++++++++ 3 files changed, 185 insertions(+) create mode 100644 drivers/mailbox/mtk-adsp-mailbox.c diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index c9fc06c7e685..6922ffef6036 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -226,6 +226,13 @@ config STM32_IPCC with hardware for Inter-Processor Communication Controller (IPCC) between processors. Say Y here if you want to have this support. +config MTK_ADSP_MBOX + tristate "MediaTek ADSP Mailbox Controller" + depends on ARCH_MEDIATEK || COMPILE_TEST + help + Say yes here to add support for MediaTek ADSP mailbox controller + driver. It is used to send short messages between processors with dsp. + config MTK_CMDQ_MBOX tristate "MediaTek CMDQ Mailbox Support" depends on ARCH_MEDIATEK || COMPILE_TEST diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index c2089f04887e..18793e6caa2f 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -49,6 +49,8 @@ obj-$(CONFIG_TEGRA_HSP_MBOX) += tegra-hsp.o obj-$(CONFIG_STM32_IPCC) += stm32-ipcc.o +obj-$(CONFIG_MTK_ADSP_MBOX) += mtk-adsp-mailbox.o + obj-$(CONFIG_MTK_CMDQ_MBOX) += mtk-cmdq-mailbox.o obj-$(CONFIG_ZYNQMP_IPI_MBOX) += zynqmp-ipi-mailbox.o diff --git a/drivers/mailbox/mtk-adsp-mailbox.c b/drivers/mailbox/mtk-adsp-mailbox.c new file mode 100644 index 000000000000..b12107bc846a --- /dev/null +++ b/drivers/mailbox/mtk-adsp-mailbox.c @@ -0,0 +1,176 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2021 MediaTek Corporation. All rights reserved. + * Author: Allen-KH Cheng + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct mtk_adsp_mbox_priv { + struct device *dev; + struct mbox_controller mbox; + void __iomem *va_mboxreg; + const struct mtk_adsp_mbox_cfg *cfg; +}; + +struct mtk_adsp_mbox_cfg { + u32 set_in; + u32 set_out; + u32 clr_in; + u32 clr_out; +}; + +static struct mtk_adsp_mbox_priv *get_mtk_adsp_mbox_priv(struct mbox_controller *mbox) +{ + return container_of(mbox, struct mtk_adsp_mbox_priv, mbox); +} + +static irqreturn_t mtk_adsp_mbox_irq(int irq, void *data) +{ + struct mbox_chan *chan = data; + struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox); + u32 op = readl(priv->va_mboxreg + priv->cfg->set_out); + + writel(op, priv->va_mboxreg + priv->cfg->clr_out); + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t mtk_adsp_mbox_isr(int irq, void *data) +{ + struct mbox_chan *chan = data; + + mbox_chan_received_data(chan, NULL); + + return IRQ_HANDLED; +} + +static struct mbox_chan *mtk_adsp_mbox_xlate(struct mbox_controller *mbox, + const struct of_phandle_args *sp) +{ + return &mbox->chans[sp->args[0]]; +} + +static int mtk_adsp_mbox_startup(struct mbox_chan *chan) +{ + struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox); + + /* Clear DSP mbox command */ + writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_in); + writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_out); + + return 0; +} + +static void mtk_adsp_mbox_shutdown(struct mbox_chan *chan) +{ + struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox); + + /* Clear DSP mbox command */ + writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_in); + writel(0xFFFFFFFF, priv->va_mboxreg + priv->cfg->clr_out); +} + +static int mtk_adsp_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox); + u32 *msg = data; + + writel(*msg, priv->va_mboxreg + priv->cfg->set_in); + + return 0; +} + +static bool mtk_adsp_mbox_last_tx_done(struct mbox_chan *chan) +{ + struct mtk_adsp_mbox_priv *priv = get_mtk_adsp_mbox_priv(chan->mbox); + + return readl(priv->va_mboxreg + priv->cfg->set_in) == 0; +} + +static const struct mbox_chan_ops adsp_mbox_chan_ops = { + .send_data = mtk_adsp_mbox_send_data, + .startup = mtk_adsp_mbox_startup, + .shutdown = mtk_adsp_mbox_shutdown, + .last_tx_done = mtk_adsp_mbox_last_tx_done, +}; + +static int mtk_adsp_mbox_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_adsp_mbox_priv *priv; + const struct mtk_adsp_mbox_cfg *cfg; + struct mbox_controller *mbox; + int ret, irq; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + mbox = &priv->mbox; + mbox->dev = dev; + mbox->ops = &adsp_mbox_chan_ops; + mbox->txdone_irq = false; + mbox->txdone_poll = true; + mbox->of_xlate = mtk_adsp_mbox_xlate; + mbox->num_chans = 1; + mbox->chans = devm_kzalloc(dev, sizeof(*mbox->chans), GFP_KERNEL); + if (!mbox->chans) + return -ENOMEM; + + priv->va_mboxreg = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->va_mboxreg)) + return PTR_ERR(priv->va_mboxreg); + + cfg = of_device_get_match_data(dev); + if (!cfg) + return -EINVAL; + priv->cfg = cfg; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_threaded_irq(dev, irq, mtk_adsp_mbox_irq, + mtk_adsp_mbox_isr, IRQF_TRIGGER_NONE, + dev_name(dev), mbox->chans); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, priv); + + return devm_mbox_controller_register(dev, &priv->mbox); +} + +static const struct mtk_adsp_mbox_cfg mt8195_adsp_mbox_cfg = { + .set_in = 0x00, + .set_out = 0x1c, + .clr_in = 0x04, + .clr_out = 0x20, +}; + +static const struct of_device_id mtk_adsp_mbox_of_match[] = { + { .compatible = "mediatek,mt8195-adsp-mbox", .data = &mt8195_adsp_mbox_cfg }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_adsp_mbox_of_match); + +static struct platform_driver mtk_adsp_mbox_driver = { + .probe = mtk_adsp_mbox_probe, + .driver = { + .name = "mtk_adsp_mbox", + .of_match_table = mtk_adsp_mbox_of_match, + }, +}; +module_platform_driver(mtk_adsp_mbox_driver); + +MODULE_AUTHOR("Allen-KH Cheng "); +MODULE_DESCRIPTION("MTK ADSP Mailbox Controller"); +MODULE_LICENSE("GPL v2");