From patchwork Thu Jun 18 12:08:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ioana Ciornei X-Patchwork-Id: 1312035 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nxp.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49nghq1j3gz9sRh for ; Thu, 18 Jun 2020 22:09:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728496AbgFRMJK (ORCPT ); Thu, 18 Jun 2020 08:09:10 -0400 Received: from inva021.nxp.com ([92.121.34.21]:48800 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725955AbgFRMJI (ORCPT ); Thu, 18 Jun 2020 08:09:08 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id DEAED200D4B; Thu, 18 Jun 2020 14:09:05 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id D2394200D4A; Thu, 18 Jun 2020 14:09:05 +0200 (CEST) Received: from fsr-ub1864-126.ea.freescale.net (fsr-ub1864-126.ea.freescale.net [10.171.82.212]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 6345A2048B; Thu, 18 Jun 2020 14:09:05 +0200 (CEST) From: Ioana Ciornei To: netdev@vger.kernel.org, davem@davemloft.net Cc: vladimir.oltean@nxp.com, claudiu.manoil@nxp.com, alexandru.marginean@nxp.com, michael@walle.cc, andrew@lunn.ch, linux@armlinux.org.uk, f.fainelli@gmail.com, Russell King , Ioana Ciornei Subject: [PATCH net-next 1/5] net: phylink: add interface to configure clause 22 PCS PHY Date: Thu, 18 Jun 2020 15:08:33 +0300 Message-Id: <20200618120837.27089-2-ioana.ciornei@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618120837.27089-1-ioana.ciornei@nxp.com> References: <20200618120837.27089-1-ioana.ciornei@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Russell King Add helper for clause 22 PCS configuration via the MII bus. Apart from applying the advertisements, the pcs_config helper also sets up the BMCR_ANENABLE depending on the in-band AN state. Signed-off-by: Russell King Signed-off-by: Ioana Ciornei --- drivers/net/phy/phylink.c | 37 +++++++++++++++++++++++++++++++++++++ include/linux/phylink.h | 3 +++ 2 files changed, 40 insertions(+) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 0ab65fb75258..9670e8757fe1 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -2267,6 +2267,43 @@ int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs, } EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement); +/** + * phylink_mii_c22_pcs_config() - configure clause 22 PCS + * @pcs: a pointer to a &struct mdio_device. + * @mode: link autonegotiation mode + * @interface: the PHY interface mode being configured + * @advertising: the ethtool advertisement mask + * + * Configure a Clause 22 PCS PHY with the appropriate negotiation + * parameters for the @mode, @interface and @advertising parameters. + * Returns negative error number on failure, zero if the advertisement + * has not changed, or positive if there is a change. + */ +int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, + phy_interface_t interface, + const unsigned long *advertising) +{ + bool changed; + u16 bmcr; + int ret; + + ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface, + advertising); + if (ret < 0) + return ret; + + changed = ret > 0; + + bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0; + ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR, + BMCR_ANENABLE, bmcr); + if (ret < 0) + return ret; + + return changed ? 1 : 0; +} +EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); + /** * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation * @pcs: a pointer to a &struct mdio_device. diff --git a/include/linux/phylink.h b/include/linux/phylink.h index cc5b452a184e..d979832d0c71 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -410,6 +410,9 @@ void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs, phy_interface_t interface, const unsigned long *advertising); +int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, + phy_interface_t interface, + const unsigned long *advertising); void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs); void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, From patchwork Thu Jun 18 12:08:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ioana Ciornei X-Patchwork-Id: 1312034 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nxp.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49nghm1S3wz9sRk for ; Thu, 18 Jun 2020 22:09:12 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728802AbgFRMJL (ORCPT ); Thu, 18 Jun 2020 08:09:11 -0400 Received: from inva021.nxp.com ([92.121.34.21]:48834 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726964AbgFRMJI (ORCPT ); Thu, 18 Jun 2020 08:09:08 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id A1A56200D4A; Thu, 18 Jun 2020 14:09:06 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 9511C2000A7; Thu, 18 Jun 2020 14:09:06 +0200 (CEST) Received: from fsr-ub1864-126.ea.freescale.net (fsr-ub1864-126.ea.freescale.net [10.171.82.212]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id E0ED32048B; Thu, 18 Jun 2020 14:09:05 +0200 (CEST) From: Ioana Ciornei To: netdev@vger.kernel.org, davem@davemloft.net Cc: vladimir.oltean@nxp.com, claudiu.manoil@nxp.com, alexandru.marginean@nxp.com, michael@walle.cc, andrew@lunn.ch, linux@armlinux.org.uk, f.fainelli@gmail.com, Ioana Ciornei Subject: [PATCH net-next 2/5] net: phylink: consider QSGMII interface mode in phylink_mii_c22_pcs_get_state Date: Thu, 18 Jun 2020 15:08:34 +0300 Message-Id: <20200618120837.27089-3-ioana.ciornei@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618120837.27089-1-ioana.ciornei@nxp.com> References: <20200618120837.27089-1-ioana.ciornei@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The same link partner advertisement word is used for both QSGMII and SGMII, thus treat both interface modes using the same phylink_decode_sgmii_word() function. Signed-off-by: Ioana Ciornei --- drivers/net/phy/phylink.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 9670e8757fe1..46f1e638b287 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -2186,6 +2186,7 @@ void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, break; case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_QSGMII: phylink_decode_sgmii_word(state, lpa); break; From patchwork Thu Jun 18 12:08:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ioana Ciornei X-Patchwork-Id: 1312037 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nxp.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49nghx4kwBz9sRk for ; Thu, 18 Jun 2020 22:09:21 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728989AbgFRMJU (ORCPT ); Thu, 18 Jun 2020 08:09:20 -0400 Received: from inva020.nxp.com ([92.121.34.13]:34930 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727779AbgFRMJJ (ORCPT ); Thu, 18 Jun 2020 08:09:09 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 2C76B1A00E0; Thu, 18 Jun 2020 14:09:07 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 204151A00FF; Thu, 18 Jun 2020 14:09:07 +0200 (CEST) Received: from fsr-ub1864-126.ea.freescale.net (fsr-ub1864-126.ea.freescale.net [10.171.82.212]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id A4AE52048B; Thu, 18 Jun 2020 14:09:06 +0200 (CEST) From: Ioana Ciornei To: netdev@vger.kernel.org, davem@davemloft.net Cc: vladimir.oltean@nxp.com, claudiu.manoil@nxp.com, alexandru.marginean@nxp.com, michael@walle.cc, andrew@lunn.ch, linux@armlinux.org.uk, f.fainelli@gmail.com, Ioana Ciornei Subject: [PATCH net-next 3/5] net: mdiobus: add clause 45 mdiobus write accessor Date: Thu, 18 Jun 2020 15:08:35 +0300 Message-Id: <20200618120837.27089-4-ioana.ciornei@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618120837.27089-1-ioana.ciornei@nxp.com> References: <20200618120837.27089-1-ioana.ciornei@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add the locked variant of the clause 45 mdiobus write accessor - mdiobus_c45_write(). Signed-off-by: Ioana Ciornei --- include/linux/mdio.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/mdio.h b/include/linux/mdio.h index 36d2e0673d03..323f1d1fa271 100644 --- a/include/linux/mdio.h +++ b/include/linux/mdio.h @@ -357,6 +357,12 @@ static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad, return mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum)); } +static inline int mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad, + u16 regnum, u16 val) +{ + return mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum), val); +} + int mdiobus_register_device(struct mdio_device *mdiodev); int mdiobus_unregister_device(struct mdio_device *mdiodev); bool mdiobus_is_registered_device(struct mii_bus *bus, int addr); From patchwork Thu Jun 18 12:08:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ioana Ciornei X-Patchwork-Id: 1312036 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nxp.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49nghx007sz9sRh for ; Thu, 18 Jun 2020 22:09:20 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728850AbgFRMJU (ORCPT ); Thu, 18 Jun 2020 08:09:20 -0400 Received: from inva020.nxp.com ([92.121.34.13]:34948 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727784AbgFRMJL (ORCPT ); Thu, 18 Jun 2020 08:09:11 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id A5E3D1A0F41; Thu, 18 Jun 2020 14:09:07 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 96A621A0F3B; Thu, 18 Jun 2020 14:09:07 +0200 (CEST) Received: from fsr-ub1864-126.ea.freescale.net (fsr-ub1864-126.ea.freescale.net [10.171.82.212]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 2F4B92048B; Thu, 18 Jun 2020 14:09:07 +0200 (CEST) From: Ioana Ciornei To: netdev@vger.kernel.org, davem@davemloft.net Cc: vladimir.oltean@nxp.com, claudiu.manoil@nxp.com, alexandru.marginean@nxp.com, michael@walle.cc, andrew@lunn.ch, linux@armlinux.org.uk, f.fainelli@gmail.com, Ioana Ciornei Subject: [PATCH net-next 4/5] net: phy: add Lynx PCS MDIO module Date: Thu, 18 Jun 2020 15:08:36 +0300 Message-Id: <20200618120837.27089-5-ioana.ciornei@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618120837.27089-1-ioana.ciornei@nxp.com> References: <20200618120837.27089-1-ioana.ciornei@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add a Lynx PCS MDIO module which exposes the necessary operations to drive the PCS using PHYLINK. The majority of the code is extracted from the Felix DSA driver, which will be also modified in a later patch, and exposed as a separate module for code reusability purposes. At the moment, USXGMII (only with in-band AN and speeds up to 2500), SGMII, QSGMII and 2500Base-X (only w/o in-band AN) are supported by the Lynx PCS MDIO module since these were also supported by Felix. The module can only be enabled by the drivers in need and not user selectable. Signed-off-by: Ioana Ciornei --- MAINTAINERS | 7 + drivers/net/phy/Kconfig | 6 + drivers/net/phy/Makefile | 1 + drivers/net/phy/mdio-lynx-pcs.c | 358 ++++++++++++++++++++++++++++++++ include/linux/mdio-lynx-pcs.h | 43 ++++ 5 files changed, 415 insertions(+) create mode 100644 drivers/net/phy/mdio-lynx-pcs.c create mode 100644 include/linux/mdio-lynx-pcs.h diff --git a/MAINTAINERS b/MAINTAINERS index 301330e02bca..febba4b0a1fd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10529,6 +10529,13 @@ F: Documentation/devicetree/bindings/net/ieee802154/mcr20a.txt F: drivers/net/ieee802154/mcr20a.c F: drivers/net/ieee802154/mcr20a.h +MDIO LYNX PCS MODULE +M: Ioana Ciornei +L: netdev@vger.kernel.org +S: Maintained +F: drivers/net/phy/mdio-lynx-pcs.c +F: include/linux/mdio-lynx-pcs.h + MEASUREMENT COMPUTING CIO-DAC IIO DRIVER M: William Breathitt Gray L: linux-iio@vger.kernel.org diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index f25702386d83..6ea835e5d8ec 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -235,6 +235,12 @@ config MDIO_XPCS This module provides helper functions for Synopsys DesignWare XPCS controllers. +config MDIO_LYNX_PCS + bool + help + This module provides helper functions for Lynx PCS enablement + representing the PCS as an MDIO device. + endif endif diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index dc9e53b511d6..931d826b3a2b 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -47,6 +47,7 @@ obj-$(CONFIG_MDIO_SUN4I) += mdio-sun4i.o obj-$(CONFIG_MDIO_THUNDER) += mdio-thunder.o obj-$(CONFIG_MDIO_XGENE) += mdio-xgene.o obj-$(CONFIG_MDIO_XPCS) += mdio-xpcs.o +obj-$(CONFIG_MDIO_LYNX_PCS) += mdio-lynx-pcs.o obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += mii_timestamper.o diff --git a/drivers/net/phy/mdio-lynx-pcs.c b/drivers/net/phy/mdio-lynx-pcs.c new file mode 100644 index 000000000000..becd01651500 --- /dev/null +++ b/drivers/net/phy/mdio-lynx-pcs.c @@ -0,0 +1,358 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) +/* Copyright 2020 NXP + * Lynx PCS MDIO helpers + */ + +#include +#include +#include + +#define SGMII_CLOCK_PERIOD_NS 8 /* PCS is clocked at 125 MHz */ +#define SGMII_LINK_TIMER_VAL(ns) ((u32)((ns) / SGMII_CLOCK_PERIOD_NS)) + +#define SGMII_AN_LINK_TIMER_NS 1600000 /* defined by SGMII spec */ + +#define SGMII_LINK_TIMER_LO 0x12 +#define SGMII_LINK_TIMER_HI 0x13 +#define SGMII_IF_MODE 0x14 +#define SGMII_IF_MODE_SGMII_EN BIT(0) +#define SGMII_IF_MODE_USE_SGMII_AN BIT(1) +#define SGMII_IF_MODE_SPEED(x) (((x) << 2) & GENMASK(3, 2)) +#define SGMII_IF_MODE_SPEED_MSK GENMASK(3, 2) +#define SGMII_IF_MODE_DUPLEX BIT(4) + +#define USXGMII_ADVERTISE_LSTATUS(x) (((x) << 15) & BIT(15)) +#define USXGMII_ADVERTISE_FDX BIT(12) +#define USXGMII_ADVERTISE_SPEED(x) (((x) << 9) & GENMASK(11, 9)) + +#define USXGMII_LPA_LSTATUS(lpa) ((lpa) >> 15) +#define USXGMII_LPA_DUPLEX(lpa) (((lpa) & GENMASK(12, 12)) >> 12) +#define USXGMII_LPA_SPEED(lpa) (((lpa) & GENMASK(11, 9)) >> 9) + +enum usxgmii_speed { + USXGMII_SPEED_10 = 0, + USXGMII_SPEED_100 = 1, + USXGMII_SPEED_1000 = 2, + USXGMII_SPEED_2500 = 4, +}; + +enum sgmii_speed { + SGMII_SPEED_10 = 0, + SGMII_SPEED_100 = 1, + SGMII_SPEED_1000 = 2, + SGMII_SPEED_2500 = 2, +}; + +static void lynx_pcs_an_restart_usxgmii(struct mdio_device *pcs) +{ + mdiobus_c45_write(pcs->bus, pcs->addr, + MDIO_MMD_VEND2, MII_BMCR, + BMCR_RESET | BMCR_ANENABLE | BMCR_ANRESTART); +} + +static void lynx_pcs_an_restart(struct mdio_lynx_pcs *pcs, phy_interface_t ifmode) +{ + switch (ifmode) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_QSGMII: + phylink_mii_c22_pcs_an_restart(pcs->dev); + break; + case PHY_INTERFACE_MODE_USXGMII: + lynx_pcs_an_restart_usxgmii(pcs->dev); + break; + case PHY_INTERFACE_MODE_2500BASEX: + break; + default: + dev_err(&pcs->dev->dev, "Invalid PCS interface type %s\n", + phy_modes(ifmode)); + break; + } +} + +static void lynx_pcs_get_state_usxgmii(struct mdio_device *pcs, + struct phylink_link_state *state) +{ + struct mii_bus *bus = pcs->bus; + int addr = pcs->addr; + int status, lpa; + + status = mdiobus_c45_read(bus, addr, MDIO_MMD_VEND2, MII_BMSR); + if (status < 0) + return; + + state->link = !!(status & MDIO_STAT1_LSTATUS); + state->an_complete = !!(status & MDIO_AN_STAT1_COMPLETE); + if (!state->link || !state->an_complete) + return; + + lpa = mdiobus_c45_read(bus, addr, MDIO_MMD_VEND2, MII_LPA); + if (lpa < 0) + return; + + switch (USXGMII_LPA_SPEED(lpa)) { + case USXGMII_SPEED_10: + state->speed = SPEED_10; + break; + case USXGMII_SPEED_100: + state->speed = SPEED_100; + break; + case USXGMII_SPEED_1000: + state->speed = SPEED_1000; + break; + case USXGMII_SPEED_2500: + state->speed = SPEED_2500; + break; + default: + break; + } + + if (USXGMII_LPA_DUPLEX(lpa)) + state->duplex = DUPLEX_FULL; + else + state->duplex = DUPLEX_HALF; +} + +static void lynx_pcs_get_state_2500basex(struct mdio_device *pcs, + struct phylink_link_state *state) +{ + struct mii_bus *bus = pcs->bus; + int addr = pcs->addr; + int bmsr, lpa; + + bmsr = mdiobus_read(bus, addr, MII_BMSR); + lpa = mdiobus_read(bus, addr, MII_LPA); + if (bmsr < 0 || lpa < 0) { + state->link = false; + return; + } + + state->link = !!(bmsr & BMSR_LSTATUS); + state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); + if (!state->link) + return; + + state->speed = SPEED_2500; + state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX; +} + +static void lynx_pcs_get_state(struct mdio_lynx_pcs *pcs, phy_interface_t ifmode, + struct phylink_link_state *state) +{ + switch (ifmode) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_QSGMII: + phylink_mii_c22_pcs_get_state(pcs->dev, state); + break; + case PHY_INTERFACE_MODE_2500BASEX: + lynx_pcs_get_state_2500basex(pcs->dev, state); + break; + case PHY_INTERFACE_MODE_USXGMII: + lynx_pcs_get_state_usxgmii(pcs->dev, state); + break; + default: + break; + } + + dev_dbg(&pcs->dev->dev, + "mode=%s/%s/%s link=%u an_enabled=%u an_complete=%u\n", + phy_modes(ifmode), + phy_speed_to_str(state->speed), + phy_duplex_to_str(state->duplex), + state->link, state->an_enabled, state->an_complete); +} + +static int lynx_pcs_config_sgmii(struct mdio_device *pcs, unsigned int mode, + const unsigned long *advertising) +{ + struct mii_bus *bus = pcs->bus; + int addr = pcs->addr; + u16 if_mode; + int err; + + /* SGMII spec requires tx_config_Reg[15:0] to be exactly 0x4001 + * for the MAC PCS in order to acknowledge the AN. + */ + mdiobus_write(bus, addr, MII_ADVERTISE, + ADVERTISE_SGMII | ADVERTISE_LPACK); + + if_mode = SGMII_IF_MODE_SGMII_EN; + if (mode == MLO_AN_INBAND) { + u32 link_timer; + + if_mode |= SGMII_IF_MODE_USE_SGMII_AN; + + /* Adjust link timer for SGMII */ + link_timer = SGMII_LINK_TIMER_VAL(SGMII_AN_LINK_TIMER_NS); + mdiobus_write(bus, addr, SGMII_LINK_TIMER_LO, link_timer & 0xffff); + mdiobus_write(bus, addr, SGMII_LINK_TIMER_HI, link_timer >> 16); + } + mdiobus_modify(bus, addr, SGMII_IF_MODE, + SGMII_IF_MODE_SGMII_EN | SGMII_IF_MODE_USE_SGMII_AN, + if_mode); + + err = phylink_mii_c22_pcs_config(pcs, mode, PHY_INTERFACE_MODE_SGMII, + advertising); + return err; +} + +static int lynx_pcs_config_usxgmii(struct mdio_device *pcs, unsigned int mode, + const unsigned long *advertising) +{ + struct mii_bus *bus = pcs->bus; + int addr = pcs->addr; + + /* Configure device ability for the USXGMII Replicator */ + mdiobus_c45_write(bus, addr, MDIO_MMD_VEND2, MII_ADVERTISE, + USXGMII_ADVERTISE_SPEED(USXGMII_SPEED_2500) | + USXGMII_ADVERTISE_LSTATUS(1) | + ADVERTISE_SGMII | + ADVERTISE_LPACK | + USXGMII_ADVERTISE_FDX); + return 0; +} + +static int lynx_pcs_config(struct mdio_lynx_pcs *pcs, unsigned int mode, + phy_interface_t ifmode, + const unsigned long *advertising) +{ + switch (ifmode) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_QSGMII: + lynx_pcs_config_sgmii(pcs->dev, mode, advertising); + break; + case PHY_INTERFACE_MODE_2500BASEX: + /* 2500Base-X only works without in-band AN, + * thus nothing to do here + */ + break; + case PHY_INTERFACE_MODE_USXGMII: + lynx_pcs_config_usxgmii(pcs->dev, mode, advertising); + break; + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static void lynx_pcs_link_up_sgmii(struct mdio_device *pcs, unsigned int mode, + int speed, int duplex) +{ + struct mii_bus *bus = pcs->bus; + u16 if_mode = 0, sgmii_speed; + int addr = pcs->addr; + + /* The PCS needs to be configured manually only + * when not operating on in-band mode + */ + if (mode == MLO_AN_INBAND) + return; + + if (duplex == DUPLEX_HALF) + if_mode |= SGMII_IF_MODE_DUPLEX; + + switch (speed) { + case SPEED_1000: + sgmii_speed = SGMII_SPEED_1000; + break; + case SPEED_100: + sgmii_speed = SGMII_SPEED_100; + break; + case SPEED_10: + sgmii_speed = SGMII_SPEED_10; + break; + case SPEED_UNKNOWN: + /* Silently don't do anything */ + return; + default: + dev_err(&pcs->dev, "Invalid PCS speed %d\n", speed); + return; + } + if_mode |= SGMII_IF_MODE_SPEED(sgmii_speed); + + mdiobus_modify(bus, addr, SGMII_IF_MODE, + SGMII_IF_MODE_DUPLEX | SGMII_IF_MODE_SPEED_MSK, + if_mode); +} + +/* 2500Base-X is SerDes protocol 7 on Felix and 6 on ENETC. It is a SerDes lane + * clocked at 3.125 GHz which encodes symbols with 8b/10b and does not have + * auto-negotiation of any link parameters. Electrically it is compatible with + * a single lane of XAUI. + * The hardware reference manual wants to call this mode SGMII, but it isn't + * really, since the fundamental features of SGMII: + * - Downgrading the link speed by duplicating symbols + * - Auto-negotiation + * are not there. + * The speed is configured at 1000 in the IF_MODE because the clock frequency + * is actually given by a PLL configured in the Reset Configuration Word (RCW). + * Since there is no difference between fixed speed SGMII w/o AN and 802.3z w/o + * AN, we call this PHY interface type 2500Base-X. In case a PHY negotiates a + * lower link speed on line side, the system-side interface remains fixed at + * 2500 Mbps and we do rate adaptation through pause frames. + */ +static void lynx_pcs_link_up_2500basex(struct mdio_device *pcs, + unsigned int mode, + int speed, int duplex) +{ + struct mii_bus *bus = pcs->bus; + int addr = pcs->addr; + + if (mode == MLO_AN_INBAND) { + dev_err(&pcs->dev, "AN not supported for 2500BaseX\n"); + return; + } + + mdiobus_write(bus, addr, SGMII_IF_MODE, + SGMII_IF_MODE_SGMII_EN | + SGMII_IF_MODE_SPEED(SGMII_SPEED_2500)); +} + +static void lynx_pcs_link_up(struct mdio_lynx_pcs *pcs, unsigned int mode, + phy_interface_t interface, + int speed, int duplex) +{ + switch (interface) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_QSGMII: + lynx_pcs_link_up_sgmii(pcs->dev, mode, speed, duplex); + break; + case PHY_INTERFACE_MODE_2500BASEX: + lynx_pcs_link_up_2500basex(pcs->dev, mode, speed, duplex); + break; + case PHY_INTERFACE_MODE_USXGMII: + /* At the moment, only in-band AN is supported for USXGMII + * so nothing to do in link_up + */ + break; + default: + break; + } +} + +struct mdio_lynx_pcs *mdio_lynx_pcs_create(struct mdio_device *mdio_dev) +{ + struct mdio_lynx_pcs *pcs; + + if (WARN_ON(!mdio_dev)) + return NULL; + + pcs = kzalloc(sizeof(*pcs), GFP_KERNEL); + if (!pcs) + return NULL; + + pcs->dev = mdio_dev; + pcs->an_restart = lynx_pcs_an_restart; + pcs->get_state = lynx_pcs_get_state; + pcs->link_up = lynx_pcs_link_up; + pcs->config = lynx_pcs_config; + + return pcs; +} +EXPORT_SYMBOL(mdio_lynx_pcs_create); + +void mdio_lynx_pcs_free(struct mdio_lynx_pcs *pcs) +{ + kfree(pcs); +} +EXPORT_SYMBOL(mdio_lynx_pcs_free); diff --git a/include/linux/mdio-lynx-pcs.h b/include/linux/mdio-lynx-pcs.h new file mode 100644 index 000000000000..480ae2e2ecd8 --- /dev/null +++ b/include/linux/mdio-lynx-pcs.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ +/* Copyright 2020 NXP + * Lynx PCS MDIO helpers + */ + +#ifndef __LINUX_MDIO_LYNX_PCS_H +#define __LINUX_MDIO_LYNX_PCS_H + +#include +#include + +struct mdio_lynx_pcs { + struct mdio_device *dev; + + void (*an_restart)(struct mdio_lynx_pcs *pcs, phy_interface_t ifmode); + + void (*get_state)(struct mdio_lynx_pcs *pcs, phy_interface_t ifmode, + struct phylink_link_state *state); + + int (*config)(struct mdio_lynx_pcs *pcs, unsigned int mode, + phy_interface_t ifmode, + const unsigned long *advertising); + + void (*link_up)(struct mdio_lynx_pcs *pcs, unsigned int mode, + phy_interface_t ifmode, int speed, int duplex); +}; + +#if IS_ENABLED(CONFIG_MDIO_LYNX_PCS) +struct mdio_lynx_pcs *mdio_lynx_pcs_create(struct mdio_device *mdio_dev); + +void mdio_lynx_pcs_free(struct mdio_lynx_pcs *pcs); +#else +static struct mdio_lynx_pcs *mdio_lynx_pcs_create(struct mdio_device *mdio_dev) +{ + return NULL; +} + +static void mdio_lynx_pcs_free(struct mdio_lynx_pcs *pcs) +{ +} +#endif + +#endif /* __LINUX_MDIO_LYNX_PCS_H */ From patchwork Thu Jun 18 12:08:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ioana Ciornei X-Patchwork-Id: 1312038 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nxp.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49ngj10TScz9sRh for ; Thu, 18 Jun 2020 22:09:25 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729208AbgFRMJY (ORCPT ); Thu, 18 Jun 2020 08:09:24 -0400 Received: from inva020.nxp.com ([92.121.34.13]:34974 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727793AbgFRMJN (ORCPT ); Thu, 18 Jun 2020 08:09:13 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 31CC21A0F43; Thu, 18 Jun 2020 14:09:08 +0200 (CEST) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 209951A0F3B; Thu, 18 Jun 2020 14:09:08 +0200 (CEST) Received: from fsr-ub1864-126.ea.freescale.net (fsr-ub1864-126.ea.freescale.net [10.171.82.212]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id A5D3D2048B; Thu, 18 Jun 2020 14:09:07 +0200 (CEST) From: Ioana Ciornei To: netdev@vger.kernel.org, davem@davemloft.net Cc: vladimir.oltean@nxp.com, claudiu.manoil@nxp.com, alexandru.marginean@nxp.com, michael@walle.cc, andrew@lunn.ch, linux@armlinux.org.uk, f.fainelli@gmail.com, Ioana Ciornei Subject: [PATCH net-next 5/5] net: dsa: felix: use the Lynx PCS helpers Date: Thu, 18 Jun 2020 15:08:37 +0300 Message-Id: <20200618120837.27089-6-ioana.ciornei@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618120837.27089-1-ioana.ciornei@nxp.com> References: <20200618120837.27089-1-ioana.ciornei@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Use the helper functions introduced by the newly added Lynx PCS MDIO module. Instead of representing the PCS as a phy_device, a mdio_device structure will be passed to the Lynx module which is now actually implementing all the PCS configuration and status reporting. All code previously used for PCS momnitoring and runtime configuration is removed and replaced will calls to the Lynx PCS operations. Tested on the following SERDES protocols of LS1028A: 0x7777 (2500Base-X), 0x85bb (QSGMII), 0x9999 (SGMII) and 0x13bb (USXGMII). Signed-off-by: Ioana Ciornei Reviewed-by: Vladimir Oltean Tested-by: Vladimir Oltean Reported-by: kernel test robot --- drivers/net/dsa/ocelot/Kconfig | 1 + drivers/net/dsa/ocelot/felix.c | 5 + drivers/net/dsa/ocelot/felix.h | 7 +- drivers/net/dsa/ocelot/felix_vsc9959.c | 385 +++---------------------- include/linux/fsl/enetc_mdio.h | 21 -- 5 files changed, 52 insertions(+), 367 deletions(-) diff --git a/drivers/net/dsa/ocelot/Kconfig b/drivers/net/dsa/ocelot/Kconfig index a5b7cca03d09..d6bdb511aac5 100644 --- a/drivers/net/dsa/ocelot/Kconfig +++ b/drivers/net/dsa/ocelot/Kconfig @@ -7,6 +7,7 @@ config NET_DSA_MSCC_FELIX select MSCC_OCELOT_SWITCH select NET_DSA_TAG_OCELOT select FSL_ENETC_MDIO + select MDIO_LYNX_PCS help This driver supports the VSC9959 network switch, which is a member of the Vitesse / Microsemi / Microchip Ocelot family of switching cores. diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c index 66648986e6e3..7995695fae0a 100644 --- a/drivers/net/dsa/ocelot/felix.c +++ b/drivers/net/dsa/ocelot/felix.c @@ -277,6 +277,7 @@ static void felix_phylink_mac_link_up(struct dsa_switch *ds, int port, { struct ocelot *ocelot = ds->priv; struct ocelot_port *ocelot_port = ocelot->ports[port]; + struct felix *felix = ocelot_to_felix(ocelot); /* Enable MAC module */ ocelot_port_writel(ocelot_port, DEV_MAC_ENA_CFG_RX_ENA | @@ -295,6 +296,10 @@ static void felix_phylink_mac_link_up(struct dsa_switch *ds, int port, QSYS_SWITCH_PORT_MODE_SCH_NEXT_CFG(1) | QSYS_SWITCH_PORT_MODE_PORT_ENA, QSYS_SWITCH_PORT_MODE, port); + + if (felix->info->pcs_link_up) + felix->info->pcs_link_up(ocelot, port, link_an_mode, interface, + speed, duplex); } static void felix_port_qos_map_init(struct ocelot *ocelot, int port) diff --git a/drivers/net/dsa/ocelot/felix.h b/drivers/net/dsa/ocelot/felix.h index a891736ca006..81d93bfee23b 100644 --- a/drivers/net/dsa/ocelot/felix.h +++ b/drivers/net/dsa/ocelot/felix.h @@ -4,6 +4,8 @@ #ifndef _MSCC_FELIX_H #define _MSCC_FELIX_H +#include + #define ocelot_to_felix(o) container_of((o), struct felix, ocelot) #define FELIX_NUM_TC 8 @@ -34,6 +36,9 @@ struct felix_info { void (*pcs_an_restart)(struct ocelot *ocelot, int port); void (*pcs_link_state)(struct ocelot *ocelot, int port, struct phylink_link_state *state); + void (*pcs_link_up)(struct ocelot *ocelot, int port, + unsigned int mode, phy_interface_t interface, + int speed, int duplex); int (*prevalidate_phy_mode)(struct ocelot *ocelot, int port, phy_interface_t phy_mode); int (*port_setup_tc)(struct dsa_switch *ds, int port, @@ -55,7 +60,7 @@ struct felix { struct felix_info *info; struct ocelot ocelot; struct mii_bus *imdio; - struct phy_device **pcs; + struct mdio_lynx_pcs **pcs; }; #endif diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c index 1dd9e348152d..6f18fd4ea44a 100644 --- a/drivers/net/dsa/ocelot/felix_vsc9959.c +++ b/drivers/net/dsa/ocelot/felix_vsc9959.c @@ -17,19 +17,6 @@ #define VSC9959_VCAP_IS2_ENTRY_WIDTH 376 #define VSC9959_VCAP_PORT_CNT 6 -/* TODO: should find a better place for these */ -#define USXGMII_BMCR_RESET BIT(15) -#define USXGMII_BMCR_AN_EN BIT(12) -#define USXGMII_BMCR_RST_AN BIT(9) -#define USXGMII_BMSR_LNKS(status) (((status) & GENMASK(2, 2)) >> 2) -#define USXGMII_BMSR_AN_CMPL(status) (((status) & GENMASK(5, 5)) >> 5) -#define USXGMII_ADVERTISE_LNKS(x) (((x) << 15) & BIT(15)) -#define USXGMII_ADVERTISE_FDX BIT(12) -#define USXGMII_ADVERTISE_SPEED(x) (((x) << 9) & GENMASK(11, 9)) -#define USXGMII_LPA_LNKS(lpa) ((lpa) >> 15) -#define USXGMII_LPA_DUPLEX(lpa) (((lpa) & GENMASK(12, 12)) >> 12) -#define USXGMII_LPA_SPEED(lpa) (((lpa) & GENMASK(11, 9)) >> 9) - #define VSC9959_TAS_GCL_ENTRY_MAX 63 enum usxgmii_speed { @@ -728,181 +715,15 @@ static int vsc9959_reset(struct ocelot *ocelot) return 0; } -static void vsc9959_pcs_an_restart_sgmii(struct phy_device *pcs) -{ - phy_set_bits(pcs, MII_BMCR, BMCR_ANRESTART); -} - -static void vsc9959_pcs_an_restart_usxgmii(struct phy_device *pcs) -{ - phy_write_mmd(pcs, MDIO_MMD_VEND2, MII_BMCR, - USXGMII_BMCR_RESET | - USXGMII_BMCR_AN_EN | - USXGMII_BMCR_RST_AN); -} - static void vsc9959_pcs_an_restart(struct ocelot *ocelot, int port) { struct felix *felix = ocelot_to_felix(ocelot); - struct phy_device *pcs = felix->pcs[port]; + struct mdio_lynx_pcs *pcs = felix->pcs[port]; if (!pcs) return; - switch (pcs->interface) { - case PHY_INTERFACE_MODE_SGMII: - case PHY_INTERFACE_MODE_QSGMII: - vsc9959_pcs_an_restart_sgmii(pcs); - break; - case PHY_INTERFACE_MODE_USXGMII: - vsc9959_pcs_an_restart_usxgmii(pcs); - break; - default: - dev_err(ocelot->dev, "Invalid PCS interface type %s\n", - phy_modes(pcs->interface)); - break; - } -} - -/* We enable SGMII AN only when the PHY has managed = "in-band-status" in the - * device tree. If we are in MLO_AN_PHY mode, we program directly state->speed - * into the PCS, which is retrieved out-of-band over MDIO. This also has the - * benefit of working with SGMII fixed-links, like downstream switches, where - * both link partners attempt to operate as AN slaves and therefore AN never - * completes. But it also has the disadvantage that some PHY chips don't pass - * traffic if SGMII AN is enabled but not completed (acknowledged by us), so - * setting MLO_AN_INBAND is actually required for those. - */ -static void vsc9959_pcs_init_sgmii(struct phy_device *pcs, - unsigned int link_an_mode, - const struct phylink_link_state *state) -{ - if (link_an_mode == MLO_AN_INBAND) { - int bmsr, bmcr; - - /* Some PHYs like VSC8234 don't like it when AN restarts on - * their system side and they restart line side AN too, going - * into an endless link up/down loop. Don't restart PCS AN if - * link is up already. - * We do check that AN is enabled just in case this is the 1st - * call, PCS detects a carrier but AN is disabled from power on - * or by boot loader. - */ - bmcr = phy_read(pcs, MII_BMCR); - if (bmcr < 0) - return; - - bmsr = phy_read(pcs, MII_BMSR); - if (bmsr < 0) - return; - - if ((bmcr & BMCR_ANENABLE) && (bmsr & BMSR_LSTATUS)) - return; - - /* SGMII spec requires tx_config_Reg[15:0] to be exactly 0x4001 - * for the MAC PCS in order to acknowledge the AN. - */ - phy_write(pcs, MII_ADVERTISE, ADVERTISE_SGMII | - ADVERTISE_LPACK); - - phy_write(pcs, ENETC_PCS_IF_MODE, - ENETC_PCS_IF_MODE_SGMII_EN | - ENETC_PCS_IF_MODE_USE_SGMII_AN); - - /* Adjust link timer for SGMII */ - phy_write(pcs, ENETC_PCS_LINK_TIMER1, - ENETC_PCS_LINK_TIMER1_VAL); - phy_write(pcs, ENETC_PCS_LINK_TIMER2, - ENETC_PCS_LINK_TIMER2_VAL); - - phy_write(pcs, MII_BMCR, BMCR_ANRESTART | BMCR_ANENABLE); - } else { - int speed; - - if (state->duplex == DUPLEX_HALF) { - phydev_err(pcs, "Half duplex not supported\n"); - return; - } - switch (state->speed) { - case SPEED_1000: - speed = ENETC_PCS_SPEED_1000; - break; - case SPEED_100: - speed = ENETC_PCS_SPEED_100; - break; - case SPEED_10: - speed = ENETC_PCS_SPEED_10; - break; - case SPEED_UNKNOWN: - /* Silently don't do anything */ - return; - default: - phydev_err(pcs, "Invalid PCS speed %d\n", state->speed); - return; - } - - phy_write(pcs, ENETC_PCS_IF_MODE, - ENETC_PCS_IF_MODE_SGMII_EN | - ENETC_PCS_IF_MODE_SGMII_SPEED(speed)); - - /* Yes, not a mistake: speed is given by IF_MODE. */ - phy_write(pcs, MII_BMCR, BMCR_RESET | - BMCR_SPEED1000 | - BMCR_FULLDPLX); - } -} - -/* 2500Base-X is SerDes protocol 7 on Felix and 6 on ENETC. It is a SerDes lane - * clocked at 3.125 GHz which encodes symbols with 8b/10b and does not have - * auto-negotiation of any link parameters. Electrically it is compatible with - * a single lane of XAUI. - * The hardware reference manual wants to call this mode SGMII, but it isn't - * really, since the fundamental features of SGMII: - * - Downgrading the link speed by duplicating symbols - * - Auto-negotiation - * are not there. - * The speed is configured at 1000 in the IF_MODE and BMCR MDIO registers - * because the clock frequency is actually given by a PLL configured in the - * Reset Configuration Word (RCW). - * Since there is no difference between fixed speed SGMII w/o AN and 802.3z w/o - * AN, we call this PHY interface type 2500Base-X. In case a PHY negotiates a - * lower link speed on line side, the system-side interface remains fixed at - * 2500 Mbps and we do rate adaptation through pause frames. - */ -static void vsc9959_pcs_init_2500basex(struct phy_device *pcs, - unsigned int link_an_mode, - const struct phylink_link_state *state) -{ - if (link_an_mode == MLO_AN_INBAND) { - phydev_err(pcs, "AN not supported on 3.125GHz SerDes lane\n"); - return; - } - - phy_write(pcs, ENETC_PCS_IF_MODE, - ENETC_PCS_IF_MODE_SGMII_EN | - ENETC_PCS_IF_MODE_SGMII_SPEED(ENETC_PCS_SPEED_2500)); - - phy_write(pcs, MII_BMCR, BMCR_SPEED1000 | - BMCR_FULLDPLX | - BMCR_RESET); -} - -static void vsc9959_pcs_init_usxgmii(struct phy_device *pcs, - unsigned int link_an_mode, - const struct phylink_link_state *state) -{ - if (link_an_mode != MLO_AN_INBAND) { - phydev_err(pcs, "USXGMII only supports in-band AN for now\n"); - return; - } - - /* Configure device ability for the USXGMII Replicator */ - phy_write_mmd(pcs, MDIO_MMD_VEND2, MII_ADVERTISE, - USXGMII_ADVERTISE_SPEED(USXGMII_SPEED_2500) | - USXGMII_ADVERTISE_LNKS(1) | - ADVERTISE_SGMII | - ADVERTISE_LPACK | - USXGMII_ADVERTISE_FDX); + pcs->an_restart(pcs, ocelot->ports[port]->phy_mode); } static void vsc9959_pcs_init(struct ocelot *ocelot, int port, @@ -910,178 +731,37 @@ static void vsc9959_pcs_init(struct ocelot *ocelot, int port, const struct phylink_link_state *state) { struct felix *felix = ocelot_to_felix(ocelot); - struct phy_device *pcs = felix->pcs[port]; + struct mdio_lynx_pcs *pcs = felix->pcs[port]; if (!pcs) return; - /* The PCS does not implement the BMSR register fully, so capability - * detection via genphy_read_abilities does not work. Since we can get - * the PHY config word from the LPA register though, there is still - * value in using the generic phy_resolve_aneg_linkmode function. So - * populate the supported and advertising link modes manually here. - */ - linkmode_set_bit_array(phy_basic_ports_array, - ARRAY_SIZE(phy_basic_ports_array), - pcs->supported); - linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, pcs->supported); - linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, pcs->supported); - linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, pcs->supported); - if (pcs->interface == PHY_INTERFACE_MODE_2500BASEX || - pcs->interface == PHY_INTERFACE_MODE_USXGMII) - linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, - pcs->supported); - if (pcs->interface != PHY_INTERFACE_MODE_2500BASEX) - linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, - pcs->supported); - phy_advertise_supported(pcs); - - switch (pcs->interface) { - case PHY_INTERFACE_MODE_SGMII: - case PHY_INTERFACE_MODE_QSGMII: - vsc9959_pcs_init_sgmii(pcs, link_an_mode, state); - break; - case PHY_INTERFACE_MODE_2500BASEX: - vsc9959_pcs_init_2500basex(pcs, link_an_mode, state); - break; - case PHY_INTERFACE_MODE_USXGMII: - vsc9959_pcs_init_usxgmii(pcs, link_an_mode, state); - break; - default: - dev_err(ocelot->dev, "Unsupported link mode %s\n", - phy_modes(pcs->interface)); - } -} - -static void vsc9959_pcs_link_state_resolve(struct phy_device *pcs, - struct phylink_link_state *state) -{ - state->an_complete = pcs->autoneg_complete; - state->an_enabled = pcs->autoneg; - state->link = pcs->link; - state->duplex = pcs->duplex; - state->speed = pcs->speed; - /* SGMII AN does not negotiate flow control, but that's ok, - * since phylink already knows that, and does: - * link_state.pause |= pl->phy_state.pause; - */ - state->pause = MLO_PAUSE_NONE; - - phydev_dbg(pcs, - "mode=%s/%s/%s adv=%*pb lpa=%*pb link=%u an_enabled=%u an_complete=%u\n", - phy_modes(pcs->interface), - phy_speed_to_str(pcs->speed), - phy_duplex_to_str(pcs->duplex), - __ETHTOOL_LINK_MODE_MASK_NBITS, pcs->advertising, - __ETHTOOL_LINK_MODE_MASK_NBITS, pcs->lp_advertising, - pcs->link, pcs->autoneg, pcs->autoneg_complete); + pcs->config(pcs, link_an_mode, state->interface, state->advertising); } -static void vsc9959_pcs_link_state_sgmii(struct phy_device *pcs, - struct phylink_link_state *state) -{ - int err; - - err = genphy_update_link(pcs); - if (err < 0) - return; - - if (pcs->autoneg_complete) { - u16 lpa = phy_read(pcs, MII_LPA); - - mii_lpa_to_linkmode_lpa_sgmii(pcs->lp_advertising, lpa); - - phy_resolve_aneg_linkmode(pcs); - } -} - -static void vsc9959_pcs_link_state_2500basex(struct phy_device *pcs, - struct phylink_link_state *state) +static void vsc9959_pcs_link_state(struct ocelot *ocelot, int port, + struct phylink_link_state *state) { - int err; + struct felix *felix = ocelot_to_felix(ocelot); + struct mdio_lynx_pcs *pcs = felix->pcs[port]; - err = genphy_update_link(pcs); - if (err < 0) + if (!pcs) return; - pcs->speed = SPEED_2500; - pcs->asym_pause = true; - pcs->pause = true; + pcs->get_state(pcs, ocelot->ports[port]->phy_mode, state); } -static void vsc9959_pcs_link_state_usxgmii(struct phy_device *pcs, - struct phylink_link_state *state) -{ - int status, lpa; - - status = phy_read_mmd(pcs, MDIO_MMD_VEND2, MII_BMSR); - if (status < 0) - return; - - pcs->autoneg = true; - pcs->autoneg_complete = USXGMII_BMSR_AN_CMPL(status); - pcs->link = USXGMII_BMSR_LNKS(status); - - if (!pcs->link || !pcs->autoneg_complete) - return; - - lpa = phy_read_mmd(pcs, MDIO_MMD_VEND2, MII_LPA); - if (lpa < 0) - return; - - switch (USXGMII_LPA_SPEED(lpa)) { - case USXGMII_SPEED_10: - pcs->speed = SPEED_10; - break; - case USXGMII_SPEED_100: - pcs->speed = SPEED_100; - break; - case USXGMII_SPEED_1000: - pcs->speed = SPEED_1000; - break; - case USXGMII_SPEED_2500: - pcs->speed = SPEED_2500; - break; - default: - break; - } - - if (USXGMII_LPA_DUPLEX(lpa)) - pcs->duplex = DUPLEX_FULL; - else - pcs->duplex = DUPLEX_HALF; -} - -static void vsc9959_pcs_link_state(struct ocelot *ocelot, int port, - struct phylink_link_state *state) +static void vsc9959_pcs_link_up(struct ocelot *ocelot, int port, + unsigned int mode, phy_interface_t interface, + int speed, int duplex) { struct felix *felix = ocelot_to_felix(ocelot); - struct phy_device *pcs = felix->pcs[port]; + struct mdio_lynx_pcs *pcs = felix->pcs[port]; if (!pcs) return; - pcs->speed = SPEED_UNKNOWN; - pcs->duplex = DUPLEX_UNKNOWN; - pcs->pause = 0; - pcs->asym_pause = 0; - - switch (pcs->interface) { - case PHY_INTERFACE_MODE_SGMII: - case PHY_INTERFACE_MODE_QSGMII: - vsc9959_pcs_link_state_sgmii(pcs, state); - break; - case PHY_INTERFACE_MODE_2500BASEX: - vsc9959_pcs_link_state_2500basex(pcs, state); - break; - case PHY_INTERFACE_MODE_USXGMII: - vsc9959_pcs_link_state_usxgmii(pcs, state); - break; - default: - return; - } - - vsc9959_pcs_link_state_resolve(pcs, state); + pcs->link_up(pcs, mode, interface, speed, duplex); } static int vsc9959_prevalidate_phy_mode(struct ocelot *ocelot, int port, @@ -1130,6 +810,14 @@ static int vsc9959_mdio_bus_alloc(struct ocelot *ocelot) return -ENOMEM; } + felix->pcs = devm_kcalloc(dev, felix->info->num_ports, + sizeof(struct mdio_lynx_pcs *), + GFP_KERNEL); + if (!felix->pcs) { + dev_err(dev, "failed to allocate array for Lynx PCS devices\n"); + return -ENOMEM; + } + imdio_base = pci_resource_start(felix->pdev, felix->info->imdio_pci_bar); @@ -1177,18 +865,23 @@ static int vsc9959_mdio_bus_alloc(struct ocelot *ocelot) for (port = 0; port < felix->info->num_ports; port++) { struct ocelot_port *ocelot_port = ocelot->ports[port]; - struct phy_device *pcs; - bool is_c45 = false; + struct mdio_device *pcs_mdio; - if (ocelot_port->phy_mode == PHY_INTERFACE_MODE_USXGMII) - is_c45 = true; + if (dsa_is_unused_port(felix->ds, port)) + continue; + + if (ocelot_port->phy_mode == PHY_INTERFACE_MODE_INTERNAL) + continue; - pcs = get_phy_device(felix->imdio, port, is_c45); - if (IS_ERR(pcs)) + pcs_mdio = mdio_device_create(felix->imdio, port); + if (IS_ERR(pcs_mdio)) continue; - pcs->interface = ocelot_port->phy_mode; - felix->pcs[port] = pcs; + felix->pcs[port] = mdio_lynx_pcs_create(pcs_mdio); + if (!felix->pcs[port]) { + mdio_device_free(pcs_mdio); + continue; + } dev_info(dev, "Found PCS at internal MDIO address %d\n", port); } @@ -1202,12 +895,13 @@ static void vsc9959_mdio_bus_free(struct ocelot *ocelot) int port; for (port = 0; port < ocelot->num_phys_ports; port++) { - struct phy_device *pcs = felix->pcs[port]; + struct mdio_lynx_pcs *pcs = felix->pcs[port]; if (!pcs) continue; - put_device(&pcs->mdio.dev); + mdio_device_free(pcs->dev); + mdio_lynx_pcs_free(pcs); } mdiobus_unregister(felix->imdio); } @@ -1415,6 +1109,7 @@ struct felix_info felix_info_vsc9959 = { .pcs_init = vsc9959_pcs_init, .pcs_an_restart = vsc9959_pcs_an_restart, .pcs_link_state = vsc9959_pcs_link_state, + .pcs_link_up = vsc9959_pcs_link_up, .prevalidate_phy_mode = vsc9959_prevalidate_phy_mode, .port_setup_tc = vsc9959_port_setup_tc, .port_sched_speed_set = vsc9959_sched_speed_set, diff --git a/include/linux/fsl/enetc_mdio.h b/include/linux/fsl/enetc_mdio.h index 4875dd38af7e..483679f53a91 100644 --- a/include/linux/fsl/enetc_mdio.h +++ b/include/linux/fsl/enetc_mdio.h @@ -6,27 +6,6 @@ #include -/* PCS registers */ -#define ENETC_PCS_LINK_TIMER1 0x12 -#define ENETC_PCS_LINK_TIMER1_VAL 0x06a0 -#define ENETC_PCS_LINK_TIMER2 0x13 -#define ENETC_PCS_LINK_TIMER2_VAL 0x0003 -#define ENETC_PCS_IF_MODE 0x14 -#define ENETC_PCS_IF_MODE_SGMII_EN BIT(0) -#define ENETC_PCS_IF_MODE_USE_SGMII_AN BIT(1) -#define ENETC_PCS_IF_MODE_SGMII_SPEED(x) (((x) << 2) & GENMASK(3, 2)) - -/* Not a mistake, the SerDes PLL needs to be set at 3.125 GHz by Reset - * Configuration Word (RCW, outside Linux control) for 2.5G SGMII mode. The PCS - * still thinks it's at gigabit. - */ -enum enetc_pcs_speed { - ENETC_PCS_SPEED_10 = 0, - ENETC_PCS_SPEED_100 = 1, - ENETC_PCS_SPEED_1000 = 2, - ENETC_PCS_SPEED_2500 = 2, -}; - struct enetc_hw; struct enetc_mdio_priv {