From patchwork Mon Dec 7 12:13:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steen Hegelund X-Patchwork-Id: 11955597 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=-11.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,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 15FCEC433FE for ; Mon, 7 Dec 2020 12:15:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4B6F233A0 for ; Mon, 7 Dec 2020 12:15:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727394AbgLGMPD (ORCPT ); Mon, 7 Dec 2020 07:15:03 -0500 Received: from esa2.microchip.iphmx.com ([68.232.149.84]:18700 "EHLO esa2.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726953AbgLGMPD (ORCPT ); Mon, 7 Dec 2020 07:15:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1607343302; x=1638879302; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=GFjTBwiMsy/jkht3qyFKrEfUwi0zcnxXvuQxaUOUZMA=; b=ukVqmoArXv4oOY7Ky2RX4odpDxIw6oSd9/DgEBX2At4fVkOzhI9FJ8mq jEpua/cacpjGpiZa6+LijVp9TuCBkQp9idslMRJuazrsSmYlVAEpkU9Uf 5CHZhTcCmYzBbms//ruuQfFsSBDqgsJd44ljBf8fQINqO8oo5VmjHr4ga gmdr1D2WbBEwgDP0fdW3hKo761N/pTGtyvjGt1GpfzQzLDXAGOg+p9wSm RYVH5qO95f0xQRIn/wfyA2EerPJIRQHU8S9nz7MoBv3T3dqauZ/hrLEVz vpXx9kCUlhEaG5d33F27vJCHnS16L4YpaB9vUVMfNFimqK0WDnLwBu4to Q==; IronPort-SDR: aPlQPbbxV4o/pof+XZr6LiHVeGs5VFBiFOzEEDSM32YvBWps66rSzkGtFl//KPRKHuQxf47GcT gVUjx2zb9OtfF+B7V93kur9fEIaE4ehiZ4/gnkTCjlX/AIfDYirfdSYZD+0k/BTKEm+h7P6A01 AdaAGu/0LKtcsYR/K+01io9BpA4YjltVhQ9SMq4WTWQ00+lii1IfZ51IS/SlofcBHll+aqWy8k B+gLzdq3fVRiY2ssHV1yAQjTgaf2jpy4YBcNI5jzwIVbyufavOMOedu7RNyWaN0hmjdfBOeorM LZY= X-IronPort-AV: E=Sophos;i="5.78,399,1599548400"; d="scan'208";a="98863061" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 07 Dec 2020 05:13:56 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Mon, 7 Dec 2020 05:13:56 -0700 Received: from mchp-dev-shegelun.microchip.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Mon, 7 Dec 2020 05:13:54 -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 v9 0/4] Adding the Sparx5 Serdes driver Date: Mon, 7 Dec 2020 13:13:41 +0100 Message-ID: <20201207121345.3818234-1-steen.hegelund@microchip.com> X-Mailer: git-send-email 2.29.2 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 Arhitecture: =================== 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. History: -------- 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 Lars Povlsen (2): dt-bindings: phy: Add sparx5-serdes bindings arm64: dts: sparx5: Add Sparx5 serdes driver node Steen Hegelund (2): phy: Add ethernet serdes configuration option phy: Add Sparx5 ethernet serdes PHY driver .../bindings/phy/microchip,sparx5-serdes.yaml | 100 + arch/arm64/boot/dts/microchip/sparx5.dtsi | 8 + drivers/phy/Kconfig | 3 +- drivers/phy/Makefile | 1 + drivers/phy/microchip/Kconfig | 12 + drivers/phy/microchip/Makefile | 6 + drivers/phy/microchip/sparx5_serdes.c | 2436 +++++++++++++++ drivers/phy/microchip/sparx5_serdes.h | 129 + drivers/phy/microchip/sparx5_serdes_regs.h | 2695 +++++++++++++++++ include/linux/phy/phy-ethernet-serdes.h | 30 + include/linux/phy/phy.h | 4 + 11 files changed, 5423 insertions(+), 1 deletion(-) 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 create mode 100644 include/linux/phy/phy-ethernet-serdes.h