From patchwork Thu Feb 18 16:14:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steen Hegelund X-Patchwork-Id: 12093817 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1ADCAC433DB for ; Thu, 18 Feb 2021 17:44:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CA4D464ED5 for ; Thu, 18 Feb 2021 17:44:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234548AbhBRRnL (ORCPT ); Thu, 18 Feb 2021 12:43:11 -0500 Received: from esa.microchip.iphmx.com ([68.232.153.233]:22530 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232860AbhBRQQ3 (ORCPT ); Thu, 18 Feb 2021 11:16:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1613664987; x=1645200987; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=bCIuQj7UEF7gW24RIXTiwVBmSA04qnA9oyGRVWLIcBI=; b=tptqzTZ4aDYyvy0cRFAYoqHrKTwl66dCCzGENQCMLC9H1mFF85MkdWol yFiZyVlvOpIudzKmC++Nt+p9uu4vyBIOXv4wV2yYCgw+lwnjBoTDomdjN NgYbmPwE+EwoEd3mywN9yxV3nWutSOybhlQ9/8KEL+DxhSl5FkaS5iNS7 wAvsqCHsqnAn+sQ9M56SCX3eEVlljVdJzU3BeTS3znwCBD5HMskl1Jlf2 FVY1j2+DlqJOW8jfr4MkXtfbFABlPsLWDXXcbla7XBhLPpTELCaS16Y1C eK2B38YWeyvhoDjoTOmENcMbiLjeoVZ6jbakCqDeK6lF1jXJ2wElcYQ3a A==; IronPort-SDR: InB1huoZF6WjGGRaComXPbxWlKTzUMyijzqbELpxrKYFDxHTfPEQthzzUSQiQijuxurkyX+z9G OMeCJkTifflaSVMW4UmAfRll0pPsK4Gf0vdSFq32K8XJixGVD/ku5q1tpZVTd4I6I8twwhqfDv Rl/yD87cUCjKx8kPkpcrbC0DmMjxDYcBXghvY/DX9X8elqezvymNQdxwOK+hWkSm4ck1Bk+jcY z0/prVYjB9f/13+Swo0+Yzn7jatCUvpmKIXG72QW6zbFpuRa/blJU2d3kQRtHwt5LPYiBcvPq8 t+o= X-IronPort-AV: E=Sophos;i="5.81,187,1610434800"; d="scan'208";a="110260098" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 18 Feb 2021 09:14:59 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Thu, 18 Feb 2021 09:14:59 -0700 Received: from mchp-dev-shegelun.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Thu, 18 Feb 2021 09:14:57 -0700 From: Steen Hegelund To: Kishon Vijay Abraham I , Vinod Koul CC: Steen Hegelund , Alexandre Belloni , Lars Povlsen , Bjarni Jonasson , Microchip UNG Driver List , , Subject: [PATCH v15 0/4] Adding the Sparx5 Serdes driver Date: Thu, 18 Feb 2021 17:14:47 +0100 Message-ID: <20210218161451.3489955-1-steen.hegelund@microchip.com> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Adding the Sparx5 Serdes driver This series of patches provides the serdes driver for the Microchip Sparx5 ethernet switch. The serdes driver supports the 10G and 25G serdes instances available in the Sparx5. The Sparx5 serdes support several interface modes with several speeds and also allows the client to change the mode and the speed according to changing in the environment such as changing cables from DAC to fiber. The serdes driver is to be used by the Sparx5 switchdev driver that will follow in subsequent series. Sparx5 Architecture: ==================== Below is a diagram of the Ethernet transport part of the Sparx5 chip. The diagram shows the switch core that sends/receives traffic via the Frame Bus and passes to the Port Modules. The Port Modules are able to talk to a SerDes via a Port Muxing configuration. The SerDes instances (33 in all) then passes the traffic on its lanes to the attached cuPHY or SFP module. +---------------------------------------------------------+ | | | Switch Core | | | +----------------------------+----------------------------+ | -------+--------------+------+-------+--------------+-----+ Frame Bus | | | | +------+-----+ +------+-----+ +------+-----+ +------+-----+ |1G/2.G Port | |5G Port | |10G Port | |25GG Port | |Modules | |Modules | |Modules | |Modules | |MAC, PCS | |MAC, PCS | |MAC, PCS | |MAC, PCS | +------+-----+ +------+-----+ +------+-----+ +------+-----+ | | | | -------+-+------------+-------+------+----------+---+-----+ Port Muxing | | | +-----+----+ +-----+----+ +--+-------+ |SerDes 5G | |SerDes 10G| |SerDes 25G| SerDes Driver |Lane (13) | |Lane (12) | |Lane (8) | Controls these +-----+----+ +-----+----+ +-----+----+ | | | to cuPHY to cuPHY to cuPHY or SFP or SFP or SFP The 33 SerDes instances are handled internally by 2 SerDes macros types: - A 10G SerDes macro that supports the following rates and modes: - 100 Mbps: - 100BASE-FX - 1.25 Gbps: - SGMII - 1000BASE-X - 1000BASE-KX - 3.125 Gbps: - 2.5GBASE-X - 2.5GBASE-KX - 5 Gbps: - QSGMII - USGMII - 5.15625 Gbps: - 5GBASE-KR - 5G-USXGMII - 10 Gbps: - 10G-USGMII - 10.3125 Gbps: - 10GBASE-R - 10GBASE-KR - USXGMII - A 25G SerDes macro that supports the following rates and modes: - 1.25 Gbps: - SGMII - 1000BASE-X - 1000BASE-KX - 3.125 Gbps: - 2.5GBASE-X - 2.5GBASE-KX - 5 Gbps: - QSGMII - USGMII - 5.15625 Gbps: - 5GBASE-KR - 5G-USXGMII - 10 Gbps: - 10G-USGMII - 10.3125 Gbps: - 10GBASE-R - 10GBASE-KR - USXGMII - 10.3125 Gbps: - 10GBASE-R - 10GBASE-KR - USXGMII - 25.78125 Gbps: - 25GBASE-KR - 25GBASE-CR - 25GBASE-SR - 25GBASE-LR - 25GBASE-ER The SerDes driver handles these SerDes instances and configures them based on the selected mode, speed and media type. In the current version of the SerDes driver only a subset of the above modes are supported: the modes that can be tested on our current evaluation boards (PCB134 and PCB35). The first 13 10G SerDes macros are limited to 6G, and this gives the SerDes instance architecture shown on the diagram above. The Port Muxing allows a Port Module to use a specific SerDes instance, but not all combinations are allowed. This is functionality as well as the configuration of the Port Modules is handled by the SwitchDev Driver. The Sparx5 Chip Register Model can be browsed at this location: https://github.com/microchip-ung/sparx-5_reginfo and the datasheet is available here: https://ww1.microchip.com/downloads/en/DeviceDoc/SparX-5_Family_L2L3_Enterprise_10G_Ethernet_Switches_Datasheet_00003822B.pdf History: -------- v14 -> v15: Changed the default interface function return value to -ENODEV. Moved the CMU initialization, so that it is always done before the serdes instance configuration. Added a reference to the Sparx5 datasheet. v13 -> v14: Changed the 25g apply, 10g apply and the CMU configuration functions to use a table based register update structure. The table entries still need serdes indices/instances so the table must be generated per serdes. v12 -> v13: Interface changes: - Added set_media and set_speed interfaces on the generic phy - Removed the ethernet SerDes configuration structure and its header file. Implementation changes: - Implemented the new media and speed interfaces in the Serdes driver - Removed the configure interface function in the SerDes driver - The existing configuration function is now only used internally v11 -> v12: Used bitfields for bools in configuration structures. Removed vertical alignment in structures. Removed CONFIG_DEBUG_KERNEL guard around warning checks v10 -> v11: Rebased on v5.11-rc1 v9 -> v10: Only add the new folder to the phy Kconfig (no sort fix) Corrected the serdes mode conversion for 2.5G mode. Clarified the SGMII and 1000BASEX conversion. Improved some of the more cryptic error messages. Expanded the validate function a bit, and removed the link status from the return value. v8 -> v9: Replace pr_err with dev_err Expanded the description here in the cover letter (should probably og into the driver, at least part of it). v7 -> v8: Provide the IO targets as offsets from the start of the IO range Initialise resource index v6 -> v7: This series changes the way the IO targets are provided to the driver. Now only one IO range is available in the DT, and the driver has a table to map its targets (as their order is still not sequential), thus reducing the DT needed information and binding requirements. The register access macros have been converted to functions. - Bindings: - reg prop: minItems set to 1 - reg-names prop: removed - Driver - Use one IO range and map targets via this. - Change register access macros to use functions. - Provided a new header files with reg access functions. - Device tree - Provide only one IO range v5 -> v6: Series error: This had the same content as v5 v4 -> v5: - Bindings: - Removed .yaml from compatible string - reg prop: removed description and added minItems - reg-names prop: removed description and added const name list and minItems - #phy-cells prop: removed description and added maxItems - Configuration interface - Removed include of linux/phy.h - Added include of linux/types.h - Driver - Added include of linux/phy.h v3 -> v4: - Add a reg-names item to the binding description - Add a clocks item to the binding description - Removed the clock parameter from the configuration interface - Use the clock dt node to get the coreclock, and using that when doing the actual serdes configuration - Added a clocks entry with a system clock reference to the serdes node in the device tree v2 -> v3: - Sorted the Kconfig sourced folders - Sorted the Makefile included folders - Changed the configuration interface documentation to use kernel style v1 -> v2: Fixed kernel test robot warnings - Made these structures static: - media_presets_25g - mode_presets_25g - media_presets_10g - mode_presets_10g - Removed these duplicate initializations: - sparx5_sd25g28_params.cfg_rx_reserve_15_8 - sparx5_sd25g28_params.cfg_pi_en - sparx5_sd25g28_params.cfg_cdrck_en - sparx5_sd10g28_params.cfg_cdrck_en Steen Hegelund (4): dt-bindings: phy: Add sparx5-serdes bindings phy: Add media type and speed serdes configuration interfaces phy: Add Sparx5 ethernet serdes PHY driver arm64: dts: sparx5: Add Sparx5 serdes driver node .../bindings/phy/microchip,sparx5-serdes.yaml | 100 + arch/arm64/boot/dts/microchip/sparx5.dtsi | 8 + drivers/phy/Kconfig | 1 + drivers/phy/Makefile | 1 + drivers/phy/microchip/Kconfig | 12 + drivers/phy/microchip/Makefile | 6 + drivers/phy/microchip/sparx5_serdes.c | 2480 +++++++++++++++ drivers/phy/microchip/sparx5_serdes.h | 136 + drivers/phy/microchip/sparx5_serdes_regs.h | 2695 +++++++++++++++++ drivers/phy/phy-core.c | 30 + include/linux/phy/phy.h | 26 + 11 files changed, 5495 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/microchip,sparx5-serdes.yaml create mode 100644 drivers/phy/microchip/Kconfig create mode 100644 drivers/phy/microchip/Makefile create mode 100644 drivers/phy/microchip/sparx5_serdes.c create mode 100644 drivers/phy/microchip/sparx5_serdes.h create mode 100644 drivers/phy/microchip/sparx5_serdes_regs.h --- 2.30.0