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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3D296C433FE for ; Sun, 26 Dec 2021 21:49:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234615AbhLZVtB (ORCPT ); Sun, 26 Dec 2021 16:49:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58180 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234563AbhLZVtA (ORCPT ); Sun, 26 Dec 2021 16:49:00 -0500 X-Greylist: delayed 1171 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Sun, 26 Dec 2021 13:49:00 PST Received: from fudo.makrotopia.org (fudo.makrotopia.org [IPv6:2a07:2ec0:3002::71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7FEB9C06173E; Sun, 26 Dec 2021 13:49:00 -0800 (PST) Received: from local by fudo.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.94.2) (envelope-from ) id 1n1b4w-0006KZ-7T; Sun, 26 Dec 2021 22:29:18 +0100 Date: Sun, 26 Dec 2021 21:29:09 +0000 From: Daniel Golle To: linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Felix Fietkau , John Crispin , Sean Wang , Mark Lee , "David S. Miller" , Jakub Kicinski , Matthias Brugger , Russell King Subject: [PATCH] net: ethernet: mtk_eth_soc: implement Clause 45 MDIO access Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement read and write access to IEEE 802.3 Clause 45 Ethernet phy registers. Tested on the Ubiquiti UniFi 6 LR access point featuring MediaTek MT7622BV WiSoC with Aquantia AQR112C. Signed-off-by: Daniel Golle --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 56 ++++++++++++++++++--- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 3 ++ 2 files changed, 51 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index bcb91b01e69f5..9f896a90a4c4c 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -102,10 +102,30 @@ static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, write_data &= 0xffff; - mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE | - (phy_register << PHY_IAC_REG_SHIFT) | - (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data, - MTK_PHY_IAC); + if (phy_register & MII_ADDR_C45) { + u8 dev_num = (phy_register >> 16) & 0x1f; + u16 reg = (u16)(phy_register & 0xffff); + + mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_SET_ADDR | + (phy_addr << PHY_IAC_ADDR_SHIFT) | + (dev_num << PHY_IAC_REG_SHIFT) | + reg, + MTK_PHY_IAC); + + if (mtk_mdio_busy_wait(eth)) + return 0xffff; + + mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_WRITE | + (phy_addr << PHY_IAC_ADDR_SHIFT) | + (dev_num << PHY_IAC_REG_SHIFT) | + write_data, + MTK_PHY_IAC); + } else { + mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE | + (phy_register << PHY_IAC_REG_SHIFT) | + (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data, + MTK_PHY_IAC); + } if (mtk_mdio_busy_wait(eth)) return -1; @@ -120,10 +140,29 @@ static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg) if (mtk_mdio_busy_wait(eth)) return 0xffff; - mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ | - (phy_reg << PHY_IAC_REG_SHIFT) | - (phy_addr << PHY_IAC_ADDR_SHIFT), - MTK_PHY_IAC); + if (phy_reg & MII_ADDR_C45) { + u8 dev_num = (phy_reg >> 16) & 0x1f; + u16 reg = (u16)(phy_reg & 0xffff); + + mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_SET_ADDR | + (phy_addr << PHY_IAC_ADDR_SHIFT) | + (dev_num << PHY_IAC_REG_SHIFT) | + reg, + MTK_PHY_IAC); + + if (mtk_mdio_busy_wait(eth)) + return 0xffff; + + mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_READ_C45 | + (phy_addr << PHY_IAC_ADDR_SHIFT) | + (dev_num << PHY_IAC_REG_SHIFT), + MTK_PHY_IAC); + } else { + mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ | + (phy_reg << PHY_IAC_REG_SHIFT) | + (phy_addr << PHY_IAC_ADDR_SHIFT), + MTK_PHY_IAC); + } if (mtk_mdio_busy_wait(eth)) return 0xffff; @@ -497,6 +536,7 @@ static int mtk_mdio_init(struct mtk_eth *eth) eth->mii_bus->name = "mdio"; eth->mii_bus->read = mtk_mdio_read; eth->mii_bus->write = mtk_mdio_write; + eth->mii_bus->probe_capabilities = MDIOBUS_C22_C45; eth->mii_bus->priv = eth; eth->mii_bus->parent = eth->dev; diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index 5ef70dd8b49c6..b73d8adc9d24c 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -341,9 +341,12 @@ /* PHY Indirect Access Control registers */ #define MTK_PHY_IAC 0x10004 #define PHY_IAC_ACCESS BIT(31) +#define PHY_IAC_SET_ADDR 0 #define PHY_IAC_READ BIT(19) +#define PHY_IAC_READ_C45 (BIT(18) | BIT(19)) #define PHY_IAC_WRITE BIT(18) #define PHY_IAC_START BIT(16) +#define PHY_IAC_START_C45 0 #define PHY_IAC_ADDR_SHIFT 20 #define PHY_IAC_REG_SHIFT 25 #define PHY_IAC_TIMEOUT HZ -- 2.34.1