From patchwork Mon Oct 14 07:58:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pi-Hsun Shih X-Patchwork-Id: 11187979 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 C604B139A for ; Mon, 14 Oct 2019 07:58:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9ED6320673 for ; Mon, 14 Oct 2019 07:58:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="TKC44juv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730146AbfJNH61 (ORCPT ); Mon, 14 Oct 2019 03:58:27 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:38163 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729880AbfJNH61 (ORCPT ); Mon, 14 Oct 2019 03:58:27 -0400 Received: by mail-pl1-f195.google.com with SMTP id w8so7649432plq.5 for ; Mon, 14 Oct 2019 00:58:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=zq2idAI5QbvylMcTdhYX+jOntNKTXawDb3g0tY+VUeA=; b=TKC44juvLTUtOYvpPffnlXP32PiHITQ0NlscI2DsA1ZlP2f8WlOfRj2IgtnwP0l1UV 5LMi+89UernAosrovcPZHraOa8vrDUVwPWROkXS9WdQ2IlE1QpwUN1e6+3wC/U3P7NgM RBxBl2nftHGmCp+yGAW67KXNoJzHwZ7pFGxNU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=zq2idAI5QbvylMcTdhYX+jOntNKTXawDb3g0tY+VUeA=; b=H/bkuyUjGleuPELUYnXtOUkrZbwuiMdyN+yfWCZilGR644JA91vBJ4GDoYELI/Na4M 2AhtxMDMMoqB44vQ9cwIQmhZSssgQscSj6glNvU5ynrP4KhQRhuiY3CmuHMRvxKjVNKW ym+4aF4tlPsKKH/4yNiH+ySCZfD0KFrXPFvnq1ZHSPWNqX+ytYSwILnoAEubGXKPn+ap oJ5m16yB+Aca4PnORgz7wCL3mYEUq81Z27OmURcgTjUNvDpGtxjU7Pb/BTA05mkN6Cmq Q5EIzTb+5qc6gI6Sjh+HihGYIMLkGPsP6y5Q9GeN+GNw9XzB/ceZZQ5n/1nmdSrVS63c TGcw== X-Gm-Message-State: APjAAAXwhSK79NeswVcqnxIab5wgi1GpcQYqszN5jJ1jykUv/qaiBz7S Jycb3q7DmDDifKv3txXD6dwgqHGgHAM= X-Google-Smtp-Source: APXvYqyU9jl6fv3LCoiUISoY8naIYvEm7WwIxhwcvFc1NYVD8n+0kvaFnILKpFP/YkqfvXWNwwQKug== X-Received: by 2002:a17:902:8342:: with SMTP id z2mr28568440pln.309.1571039905128; Mon, 14 Oct 2019 00:58:25 -0700 (PDT) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id q76sm36695998pfc.86.2019.10.14.00.58.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Oct 2019 00:58:24 -0700 (PDT) From: Pi-Hsun Shih Cc: Pi-Hsun Shih , devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-kernel@vger.kernel.org (open list), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-remoteproc@vger.kernel.org (open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM) Subject: [PATCH v20 0/4] Add support for mt8183 SCP. Date: Mon, 14 Oct 2019 15:58:05 +0800 Message-Id: <20191014075812.181942-1-pihsun@chromium.org> X-Mailer: git-send-email 2.23.0.700.g56cf767bdb-goog MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Add support for controlling and communicating with mt8183's system control processor (SCP), using the remoteproc & rpmsg framework. And also add a cros_ec driver for CrOS EC host command over rpmsg. The overall structure of the series is: * remoteproc/mtk_scp.c: Control the start / stop of SCP (Patch 2). * remoteproc/mtk_scp_ipi.c: Communicates to SCP using inter-processor interrupt (IPI) and shared memory (Patch 2). * rpmsg/mtk_rpmsg.c: Wrapper to wrap the IPI communication into a rpmsg device. Supports name service for SCP firmware to announce channels (Patch 3). * add scp dts node to mt8183 platform (Patch 4). Changes from v19: - Fix an incorrect include in mtk_rpmsg.h (linux/device.h -> linux/platform_device.h) Changes from v18: - Change the way shared memory is handled, and drop patch 3. Changes from v17: - Fix mixture use of __iomem found by sparse. - Change the ipi handler to take a u32 instead of enum scp_ipi_id. - Mark mtk_rpmsg_{prepare,unprepare,stop} as static. Changes from v16: - Change the desc_lock mutex to be a per-id lock. - Put the execution of handler inside the per-id lock, to prevent race between scp_ipi_unregister and handler being run. - Move the initialization of mutex to before scp_ipi_register. Changes from v15: - Fix a bug on incorrect usage of wait_event_timeout return value. Changes from v14: - Fix a typo on variable in DEBUG section. Changes from v13: - Move include/linux/platform_data/mtk_scp.h to include/linux/remoteproc/mtk_scp.h. - Rename scp_get_reserve_* to scp_get_reserved_*. - Add lock for access of scp->ipi_desc. - Lock the whole ipi_send function. - Move more setting of cache size from SCP firmware to kernel driver, to prevent problem while loading firmware onto DRAM. - Minor fixes addressing comment. Changes from v12: - Initialize cache before firmware load, to avoid problem while loading large firmware. - Disable watchdog before stopping SCP, to avoid extra warning message. - Fix new warnings by checkpatch. Changes from v11: - Fixed a bug that mtk_rpmsg_endpoint is not properly cleaned up if rproc_boot fails. - Add missing documentation in comment. Changes from v10: - Drop applied cros_ec_rpmsg patches. - Add clock reset before loading SCP firmware. - Fix some type mismatch warnings when printing debug messages. Changes from v9: - Remove reserve-memory-vpu_share node. - Remove change to cros_ec_commands.h (That is already in https://lore.kernel.org/lkml/20190518063949.GY4319@dell/T/) Changes from v8: - Rebased onto https://patchwork.kernel.org/cover/10962385/. - Drop merged cros_ec_rpmsg patch, and add scp dts node patch. - Add more reserved memory region. Changes from v7: - Rebase onto https://lore.kernel.org/patchwork/patch/1059196/. - Fix clock enable/disable timing for SCP driver. - Add more SCP IPI ID. Changes from v6: - Decouple mtk_rpmsg from mtk_scp. - Change data of EC response to be aligned to 4 bytes. Changes from v5: - Add device tree binding document for cros_ec_rpmsg. - Better document in comments for cros_ec_rpmsg. - Remove dependency on CONFIG_ in binding tree document. Changes from v4: - Merge patch 6 (Load ELF firmware) into patch 2, so the driver loads ELF firmware by default, and no longer accept plain binary. - rpmsg_device listed in device tree (as a child of the SCP node) would have it's device tree node mapped to the rpmsg_device, so the rpmsg driver can use the properties on device tree. Changes from v3: - Make writing to SCP SRAM aligned. - Add a new patch (Patch 6) to load ELF instead of bin firmware. - Add host event support for EC driver. - Fix some bugs found in testing (missing spin_lock_init, rproc_subdev_unprepare to rproc_subdev_stop). - Fix some coding style issue found by checkpatch.pl. Changes from v2: - Fold patch 3 into patch 2 in v2. - Move IPI id around to support cross-testing for old and new firmware. - Finish more TODO items. Changes from v1: - Extract functions and rename variables in mtk_scp.c. - Do cleanup properly in mtk_rpmsg.c, which also removes the problem of short-lived work items. - Code format fix based on feedback for cros_ec_rpmsg.c. - Extract feature detection for SCP into separate patch (Patch 6). Eddie Huang (1): arm64: dts: mt8183: add scp node Erin Lo (2): dt-bindings: Add a binding for Mediatek SCP remoteproc/mediatek: add SCP support for mt8183 Pi-Hsun Shih (1): rpmsg: add rpmsg support for mt8183 SCP. .../bindings/remoteproc/mtk,scp.txt | 36 ++ arch/arm64/boot/dts/mediatek/mt8183-evb.dts | 11 + arch/arm64/boot/dts/mediatek/mt8183.dtsi | 12 + drivers/remoteproc/Kconfig | 10 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/mtk_common.h | 94 +++ drivers/remoteproc/mtk_scp.c | 583 ++++++++++++++++++ drivers/remoteproc/mtk_scp_ipi.c | 176 ++++++ drivers/rpmsg/Kconfig | 9 + drivers/rpmsg/Makefile | 1 + drivers/rpmsg/mtk_rpmsg.c | 414 +++++++++++++ include/linux/remoteproc/mtk_scp.h | 143 +++++ include/linux/rpmsg/mtk_rpmsg.h | 38 ++ 13 files changed, 1528 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt create mode 100644 drivers/remoteproc/mtk_common.h create mode 100644 drivers/remoteproc/mtk_scp.c create mode 100644 drivers/remoteproc/mtk_scp_ipi.c create mode 100644 drivers/rpmsg/mtk_rpmsg.c create mode 100644 include/linux/remoteproc/mtk_scp.h create mode 100644 include/linux/rpmsg/mtk_rpmsg.h