From patchwork Thu Jun 24 14:53:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Tachici X-Patchwork-Id: 12342335 X-Patchwork-Delegate: kuba@kernel.org 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 06911C49EA6 for ; Thu, 24 Jun 2021 14:45:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8E03613C3 for ; Thu, 24 Jun 2021 14:45:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232285AbhFXOrv (ORCPT ); Thu, 24 Jun 2021 10:47:51 -0400 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:61658 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231194AbhFXOrq (ORCPT ); Thu, 24 Jun 2021 10:47:46 -0400 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 15OEfUfG024009; Thu, 24 Jun 2021 10:45:09 -0400 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 39bk4vj7a8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 24 Jun 2021 10:45:09 -0400 Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 15OEj8fX041081 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 24 Jun 2021 10:45:08 -0400 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.858.5; Thu, 24 Jun 2021 10:45:07 -0400 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.858.5; Thu, 24 Jun 2021 10:45:06 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.858.5 via Frontend Transport; Thu, 24 Jun 2021 10:45:06 -0400 Received: from localhost.localdomain ([10.48.65.12]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 15OEj0IK003029; Thu, 24 Jun 2021 10:45:03 -0400 From: To: , CC: , , , , Alexandru Ardelean , Alexandru Tachici Subject: [PATCH 1/4] net: phy: adin1100: Add initial support for ADIN1100 industrial PHY Date: Thu, 24 Jun 2021 17:53:50 +0300 Message-ID: <20210624145353.6910-2-alexandru.tachici@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210624145353.6910-1-alexandru.tachici@analog.com> References: <20210624145353.6910-1-alexandru.tachici@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: QdbMjFJoHD5snEMFzmRxdCPU5sf7egIh X-Proofpoint-ORIG-GUID: QdbMjFJoHD5snEMFzmRxdCPU5sf7egIh X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-06-24_12:2021-06-24,2021-06-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 mlxlogscore=999 impostorscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 bulkscore=0 mlxscore=0 spamscore=0 clxscore=1015 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106240081 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Alexandru Ardelean The ADIN1100 is a low power single port 10BASE-T1L transceiver designed for industrial Ethernet applications and is compliant with the IEEE 802.3cg Ethernet standard for long reach 10 Mb/s Single Pair Ethernet. Signed-off-by: Alexandru Ardelean Signed-off-by: Alexandru Tachici Reported-by: kernel test robot --- drivers/net/phy/Kconfig | 7 + drivers/net/phy/Makefile | 1 + drivers/net/phy/adin1100.c | 437 +++++++++++++++++++++++++++++++++++++ 3 files changed, 445 insertions(+) create mode 100644 drivers/net/phy/adin1100.c diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index c56f703ae998..8f9f61fe0020 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -83,6 +83,13 @@ config ADIN_PHY - ADIN1300 - Robust,Industrial, Low Latency 10/100/1000 Gigabit Ethernet PHY +config ADIN1100_PHY + tristate "Analog Devices Industrial Ethernet T1L PHYs" + help + Adds support for the Analog Devices Industrial T1L Ethernet PHYs. + Currently supports the: + - ADIN1100 - Robust,Industrial, Low Power 10BASE-T1L Ethernet PHY + config AQUANTIA_PHY tristate "Aquantia PHYs" help diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 172bb193ae6a..3bd6a369d60c 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -31,6 +31,7 @@ sfp-obj-$(CONFIG_SFP) += sfp-bus.o obj-y += $(sfp-obj-y) $(sfp-obj-m) obj-$(CONFIG_ADIN_PHY) += adin.o +obj-$(CONFIG_ADIN1100_PHY) += adin1100.o obj-$(CONFIG_AMD_PHY) += amd.o aquantia-objs += aquantia_main.o ifdef CONFIG_HWMON diff --git a/drivers/net/phy/adin1100.c b/drivers/net/phy/adin1100.c new file mode 100644 index 000000000000..8d85a4d00d80 --- /dev/null +++ b/drivers/net/phy/adin1100.c @@ -0,0 +1,437 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) +/** + * Driver for Analog Devices Industrial Ethernet T1L PHYs + * + * Copyright 2020 Analog Devices Inc. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PHY_ID_ADIN1100 0x0283bc81 + +static const int phy_10_features_array[] = { + ETHTOOL_LINK_MODE_10baseT_Full_BIT, +}; + +#define ADIN_B10L_PCS_CNTRL 0x08e6 +#define ADIN_PCS_CNTRL_B10L_LB_PCS_EN BIT(14) + +#define ADIN_B10L_PMA_CNTRL 0x08f6 +#define ADIN_PMA_CNTRL_B10L_LB_PMA_LOC_EN BIT(0) + +#define ADIN_B10L_PMA_STAT 0x08f7 +#define ADIN_PMA_STAT_B10L_LB_PMA_LOC_ABLE BIT(13) +#define ADIN_PMA_STAT_B10L_TX_LVL_HI_ABLE BIT(12) + +#define ADIN_AN_CONTROL 0x0200 +#define ADIN_AN_RESTART BIT(9) +#define ADIN_AN_EN BIT(12) + +#define ADIN_AN_STATUS 0x0201 +#define ADIN_AN_ADV_ABILITY_L 0x0202 +#define ADIN_AN_ADV_ABILITY_M 0x0203 +#define ADIN_AN_ADV_ABILITY_H 0x0204U +#define ADIN_AN_ADV_B10L_TX_LVL_HI_ABL BIT(13) +#define ADIN_AN_ADV_B10L_TX_LVL_HI_REQ BIT(12) + +#define ADIN_AN_LP_ADV_ABILITY_L 0x0205 + +#define ADIN_AN_LP_ADV_ABILITY_M 0x0206 +#define ADIN_AN_LP_ADV_B10L BIT(14) +#define ADIN_AN_LP_ADV_B1000 BIT(7) +#define ADIN_AN_LP_ADV_B10S_FD BIT(6) +#define ADIN_AN_LP_ADV_B100 BIT(5) +#define ADIN_AN_LP_ADV_MST BIT(4) + +#define ADIN_AN_LP_ADV_ABILITY_H 0x0207 +#define ADIN_AN_LP_ADV_B10L_EEE BIT(14) +#define ADIN_AN_LP_ADV_B10L_TX_LVL_HI_ABL BIT(13) +#define ADIN_AN_LP_ADV_B10L_TX_LVL_HI_REQ BIT(12) +#define ADIN_AN_LP_ADV_B10S_HD BIT(11) + +#define ADIN_CRSM_SFT_RST 0x8810 +#define ADIN_CRSM_SFT_RST_EN BIT(0) + +#define ADIN_CRSM_SFT_PD_CNTRL 0x8812 +#define ADIN_CRSM_SFT_PD_CNTRL_EN BIT(0) + +#define ADIN_CRSM_STAT 0x8818 +#define ADIN_CRSM_SFT_PD_RDY BIT(1) +#define ADIN_CRSM_SYS_RDY BIT(0) + +#define ADIN_MAC_IF_LOOPBACK 0x803d +#define ADIN_MAC_IF_LOOPBACK_EN BIT(0) +#define ADIN_MAC_IF_REMOTE_LOOPBACK_EN BIT(2) + +/** + * struct adin_priv - ADIN PHY driver private data + * tx_level_24v set if the PHY supports 2.4V TX levels (10BASE-T1L) + */ +struct adin_priv { + unsigned int tx_level_24v:1; +}; + +static int adin_match_phy_device(struct phy_device *phydev) +{ + struct mii_bus *bus = phydev->mdio.bus; + int phy_addr = phydev->mdio.addr; + u32 id; + int rc; + + mutex_lock(&bus->mdio_lock); + + /* Need to call __mdiobus_read() directly here, because at this point + * in time, the driver isn't attached to the PHY device. + */ + rc = __mdiobus_read(bus, phy_addr, MDIO_DEVID1); + if (rc < 0) { + mutex_unlock(&bus->mdio_lock); + return rc; + } + + id = rc << 16; + + rc = __mdiobus_read(bus, phy_addr, MDIO_DEVID2); + mutex_unlock(&bus->mdio_lock); + + if (rc < 0) + return rc; + + id |= rc; + + switch (id) { + case PHY_ID_ADIN1100: + return 1; + default: + return 0; + } +} + +static void adin_mii_adv_m_to_ethtool_adv_t(unsigned long *advertising, u32 adv) +{ + if (adv & ADIN_AN_LP_ADV_B10L) + linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, advertising); + if (adv & ADIN_AN_LP_ADV_B1000) { + linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, advertising); + linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, advertising); + } + if (adv & ADIN_AN_LP_ADV_B10S_FD) + linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, advertising); + if (adv & ADIN_AN_LP_ADV_B100) + linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, advertising); +} + +static void adin_mii_adv_h_to_ethtool_adv_t(unsigned long *advertising, u32 adv) +{ + if (adv & ADIN_AN_LP_ADV_B10S_HD) + linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, advertising); +} + +static int adin_read_lpa(struct phy_device *phydev) +{ + int val; + + linkmode_zero(phydev->lp_advertising); + + val = phy_read_mmd(phydev, MDIO_MMD_AN, ADIN_AN_STATUS); + if (val < 0) + return val; + + if (!(val & MDIO_AN_STAT1_COMPLETE)) { + phydev->pause = 0; + phydev->asym_pause = 0; + + return 0; + } + + linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, + phydev->lp_advertising); + + /* Read the link partner's base page advertisement */ + val = phy_read_mmd(phydev, MDIO_MMD_AN, ADIN_AN_LP_ADV_ABILITY_L); + if (val < 0) + return val; + + phydev->pause = val & LPA_PAUSE_CAP ? 1 : 0; + phydev->asym_pause = val & LPA_PAUSE_ASYM ? 1 : 0; + + val = phy_read_mmd(phydev, MDIO_MMD_AN, ADIN_AN_LP_ADV_ABILITY_M); + if (val < 0) + return val; + + adin_mii_adv_m_to_ethtool_adv_t(phydev->lp_advertising, val); + + val = phy_read_mmd(phydev, MDIO_MMD_AN, ADIN_AN_LP_ADV_ABILITY_H); + if (val < 0) + return val; + + adin_mii_adv_h_to_ethtool_adv_t(phydev->lp_advertising, val); + + return 0; +} + +static int adin_read_status(struct phy_device *phydev) +{ + int ret; + + ret = genphy_c45_read_link(phydev); + if (ret) + return ret; + + phydev->speed = SPEED_UNKNOWN; + phydev->duplex = DUPLEX_UNKNOWN; + phydev->pause = 0; + phydev->asym_pause = 0; + + if (phydev->autoneg == AUTONEG_ENABLE) { + ret = adin_read_lpa(phydev); + if (ret) + return ret; + + phy_resolve_aneg_linkmode(phydev); + } else { + /* Only one mode & duplex supported */ + linkmode_zero(phydev->lp_advertising); + phydev->speed = SPEED_10; + phydev->duplex = DUPLEX_FULL; + } + + return ret; +} + +static int adin_config_aneg(struct phy_device *phydev) +{ + struct adin_priv *priv = phydev->priv; + int ret; + + /* No sense to continue if auto-neg is disabled, + * only one link-mode supported. + */ + if (phydev->autoneg == AUTONEG_DISABLE) + return 0; + + if (priv->tx_level_24v) + ret = phy_set_bits_mmd(phydev, MDIO_MMD_AN, + ADIN_AN_ADV_ABILITY_H, + ADIN_AN_ADV_B10L_TX_LVL_HI_ABL | + ADIN_AN_ADV_B10L_TX_LVL_HI_REQ); + else + ret = phy_clear_bits_mmd(phydev, MDIO_MMD_AN, + ADIN_AN_ADV_ABILITY_H, + ADIN_AN_ADV_B10L_TX_LVL_HI_ABL | + ADIN_AN_ADV_B10L_TX_LVL_HI_REQ); + + if (ret < 0) + return ret; + + return phy_set_bits_mmd(phydev, MDIO_MMD_AN, ADIN_AN_CONTROL, ADIN_AN_RESTART); +} + +static void adin_link_change_notify(struct phy_device *phydev) +{ + bool tx_level_24v; + bool lp_tx_level_24v; + int val, mask; + + if (phydev->state != PHY_RUNNING || phydev->autoneg == AUTONEG_DISABLE) + return; + + val = phy_read_mmd(phydev, MDIO_MMD_AN, ADIN_AN_LP_ADV_ABILITY_H); + if (val < 0) + return; + + mask = ADIN_AN_LP_ADV_B10L_TX_LVL_HI_ABL | ADIN_AN_LP_ADV_B10L_TX_LVL_HI_REQ; + lp_tx_level_24v = (val & mask) == mask; + + val = phy_read_mmd(phydev, MDIO_MMD_AN, ADIN_AN_ADV_ABILITY_H); + if (val < 0) + return; + + mask = ADIN_AN_ADV_B10L_TX_LVL_HI_ABL | ADIN_AN_ADV_B10L_TX_LVL_HI_REQ; + tx_level_24v = (val & mask) == mask; + + if (tx_level_24v && lp_tx_level_24v) + phydev_info(phydev, "Negotiated 2.4V TX level\n"); + else + phydev_info(phydev, "Negotiated 1.0V TX level\n"); +} + +static int adin_set_powerdown_mode(struct phy_device *phydev, bool en) +{ + int ret, timeout; + u16 val; + + if (en) + val = ADIN_CRSM_SFT_PD_CNTRL_EN; + else + val = 0; + + ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, + ADIN_CRSM_SFT_PD_CNTRL, val); + if (ret < 0) + return ret; + + timeout = 30; + while (timeout-- > 0) { + ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, + ADIN_CRSM_STAT); + if (ret < 0) + return ret; + + if ((ret & ADIN_CRSM_SFT_PD_RDY) == val) + return 0; + + mdelay(1); + } + + return -ETIMEDOUT; +} + +static int adin_suspend(struct phy_device *phydev) +{ + return adin_set_powerdown_mode(phydev, true); +} + +static int adin_resume(struct phy_device *phydev) +{ + return adin_set_powerdown_mode(phydev, false); +} + +static int adin_set_loopback(struct phy_device *phydev, bool enable) +{ + int ret; + + if (enable) + return phy_set_bits_mmd(phydev, MDIO_MMD_PCS, + ADIN_B10L_PCS_CNTRL, + ADIN_PCS_CNTRL_B10L_LB_PCS_EN); + + /* MAC interface block loopback */ + ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, ADIN_MAC_IF_LOOPBACK, + ADIN_MAC_IF_LOOPBACK_EN | + ADIN_MAC_IF_REMOTE_LOOPBACK_EN); + if (ret < 0) + return ret; + + /* PCS loopback (according to 10BASE-T1L spec) */ + ret = phy_clear_bits_mmd(phydev, MDIO_MMD_PCS, ADIN_B10L_PCS_CNTRL, + ADIN_PCS_CNTRL_B10L_LB_PCS_EN); + if (ret < 0) + return ret; + + /* PMA loopback (according to 10BASE-T1L spec) */ + return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, ADIN_B10L_PMA_CNTRL, + ADIN_PMA_CNTRL_B10L_LB_PMA_LOC_EN); +} + +static int adin_config_init(struct phy_device *phydev) +{ + struct adin_priv *priv = phydev->priv; + struct device *dev = &phydev->mdio.dev; + int ret; + + ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, ADIN_B10L_PMA_STAT); + if (ret < 0) + return ret; + + /* This depends on the voltage level from the power source */ + priv->tx_level_24v = !!(ret & ADIN_PMA_STAT_B10L_TX_LVL_HI_ABLE); + + phydev_dbg(phydev, "PHY supports 2.4V TX level: %s\n", + priv->tx_level_24v ? "yes" : "no"); + + if (priv->tx_level_24v && + device_property_present(dev, "adi,disable-2-4-v-tx-level")) { + phydev_info(phydev, + "PHY supports 2.4V TX level, but disabled via config\n"); + priv->tx_level_24v = 0; + } + + return 0; +} + +static int adin_soft_reset(struct phy_device *phydev) +{ + int timeout; + int ret; + + ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, ADIN_CRSM_SFT_RST, ADIN_CRSM_SFT_RST_EN); + if (ret < 0) + return ret; + + timeout = 30; + while (timeout >= 0) { + ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN_CRSM_STAT); + if (ret < 0) + return ret; + + if (ret & ADIN_CRSM_SYS_RDY) + return 0; + + usleep_range(10000, 15000); + timeout -= 10; + } + + return -ETIMEDOUT; +} + +static int adin_get_features(struct phy_device *phydev) +{ + linkmode_set_bit_array(phy_basic_ports_array, ARRAY_SIZE(phy_basic_ports_array), + phydev->supported); + + linkmode_set_bit_array(phy_10_features_array, ARRAY_SIZE(phy_10_features_array), + phydev->supported); + + return 0; +} + +static int adin_probe(struct phy_device *phydev) +{ + struct device *dev = &phydev->mdio.dev; + struct adin_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + phydev->priv = priv; + + return 0; +} + +static struct phy_driver adin_driver[] = { + { + PHY_ID_MATCH_MODEL(PHY_ID_ADIN1100), + .name = "ADIN1100", + .get_features = adin_get_features, + .match_phy_device = adin_match_phy_device, + .soft_reset = adin_soft_reset, + .probe = adin_probe, + .config_init = adin_config_init, + .config_aneg = adin_config_aneg, + .link_change_notify = adin_link_change_notify, + .read_status = adin_read_status, + .set_loopback = adin_set_loopback, + .suspend = adin_suspend, + .resume = adin_resume, + }, +}; + +module_phy_driver(adin_driver); + +static struct mdio_device_id __maybe_unused adin_tbl[] = { + { PHY_ID_MATCH_MODEL(PHY_ID_ADIN1100) }, + { } +}; + +MODULE_DEVICE_TABLE(mdio, adin_tbl); +MODULE_DESCRIPTION("Analog Devices Industrial Ethernet T1L PHY driver"); +MODULE_LICENSE("Dual BSD/GPL");