From patchwork Wed Dec 4 14:43:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lei Wei X-Patchwork-Id: 13893893 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4C1620B213; Wed, 4 Dec 2024 14:53:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733323994; cv=none; b=ttdqErsyqkLHh5nJghuSzARRZYPZWiGjw6oYWV+w/v8srRohll+mSCsVEztBLJA7dfDedhyMM4JFigC0brpk3LfEo+mIGQXMti7CeRRHnk1v8ksSvF29ewlKTvakFJyi3ChxMqICWKZUPhiZGCWMjKaPhMvsVFLGeFCq5OZGm5E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733323994; c=relaxed/simple; bh=hX2+RisNs7Sopsb8GRdv8J+NnTxdu3SzscHvnqrORME=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=deY5xoksRbxblaxa1skfJtOP8PjEIrR/1sT5d80Hk8RK0Z3qWEJ/aGMlzT1FcnOqsWRHH4k3RicKWAh8cbfHqZpNV8MsG+N3S60Q5voRKxhfljHifeB4CQi96PWN25qL+O61rUBKln2zNfWinvKP7e7Tsso3Dh1zFsrFEvU6GYY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=WdwN7mO9; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="WdwN7mO9" Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4B4Ell9g032114; Wed, 4 Dec 2024 14:52:56 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= idFW12SlE3rXTKh+FQtdnXDuH7ENmQNRwNsOyDnOa7E=; b=WdwN7mO9G+BNGDMa LnJT1G2OqYnZ+QDkSlWoHB/Q3MIONbW2duQMx2sdmH/BnvwnamHyH0FLASYWFnBc vYnxx3lVUITu0R1SB2c4pjatjRwG4+ghq3Beq1NkLOQeM7y2WyZ1j70K3IPU+xxH m8I3wYNEpOxGmMA4ERtgNmoNYoBh+JRQ3mliyrlWppRTmjaNSu9HRbTQgd3JIQms kNzGWA5FTUaX+A5TaPbI9H+giPTPi7cTbbi3QFBQO5RihZhlfUFi/L39EGLgmvxh rk52sQp3LH6Ly/dKdnDnS9zL3xTKcxgNMHCOMWn3agahYT6DvwtRBJCCI3Plz+kt fk213Q== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43a3faufrm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 04 Dec 2024 14:52:56 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4B4EqtNV019416 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 4 Dec 2024 14:52:55 GMT Received: from nsssdc-sh01-lnx.ap.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 4 Dec 2024 06:52:49 -0800 From: Lei Wei Date: Wed, 4 Dec 2024 22:43:54 +0800 Subject: [PATCH net-next v2 2/5] net: pcs: Add PCS driver for Qualcomm IPQ9574 SoC Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20241204-ipq_pcs_rc1-v2-2-26155f5364a1@quicinc.com> References: <20241204-ipq_pcs_rc1-v2-0-26155f5364a1@quicinc.com> In-Reply-To: <20241204-ipq_pcs_rc1-v2-0-26155f5364a1@quicinc.com> To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , Heiner Kallweit , Russell King CC: , , , , , , , , , , , , , X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1733323958; l=9172; i=quic_leiwei@quicinc.com; s=20240829; h=from:subject:message-id; bh=hX2+RisNs7Sopsb8GRdv8J+NnTxdu3SzscHvnqrORME=; b=aUfDKtJZwhjPkTMCOL3jM1+XiftEdOODAG0HIFUWjlf+0wqZjrOE5uJcYcMY7IvUqcSROge1D dXBq2LdkB72D8wX3SIiHgOerGrWImyBgGIruCKggkfWmslkY1U8pXSg X-Developer-Key: i=quic_leiwei@quicinc.com; a=ed25519; pk=uFXBHtxtDjtIrTKpDEZlMLSn1i/sonZepYO8yioKACM= X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: pBlI1EV9u0HuQjDHYTCEHtNHTPH7Ono_ X-Proofpoint-GUID: pBlI1EV9u0HuQjDHYTCEHtNHTPH7Ono_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 spamscore=0 mlxscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1011 priorityscore=1501 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412040114 The 'UNIPHY' PCS hardware block in Qualcomm's IPQ SoC supports different interface modes to enable Ethernet MAC connections for different types of external PHYs/switch. Each UNIPHY block includes a SerDes and PCS/XPCS blocks, and can operate in either PCS or XPCS modes. It supports 1Gbps and 2.5Gbps interface modes (Ex: SGMII) using the PCS, and 10Gbps interface modes (Ex: USXGMII) using the XPCS. There are three UNIPHY (PCS) instances in IPQ9574 SoC which support the six Ethernet ports in the SoC. This patch adds support for the platform driver, probe and clock registrations for the PCS driver. The platform driver creates an 'ipq_pcs' instance for each of the UNIPHY used on the given board. Signed-off-by: Lei Wei --- drivers/net/pcs/Kconfig | 9 ++ drivers/net/pcs/Makefile | 1 + drivers/net/pcs/pcs-qcom-ipq9574.c | 245 +++++++++++++++++++++++++++++++++++++ 3 files changed, 255 insertions(+) diff --git a/drivers/net/pcs/Kconfig b/drivers/net/pcs/Kconfig index f6aa437473de..de2ec527d523 100644 --- a/drivers/net/pcs/Kconfig +++ b/drivers/net/pcs/Kconfig @@ -25,6 +25,15 @@ config PCS_MTK_LYNXI This module provides helpers to phylink for managing the LynxI PCS which is part of MediaTek's SoC and Ethernet switch ICs. +config PCS_QCOM_IPQ9574 + tristate "Qualcomm IPQ9574 PCS" + depends on OF && (ARCH_QCOM || COMPILE_TEST) + depends on HAS_IOMEM + help + This module provides driver for UNIPHY PCS available on Qualcomm + IPQ9574 SoC. The UNIPHY PCS supports both PCS and XPCS functions + to support different interface modes for MAC to PHY connections. + config PCS_RZN1_MIIC tristate "Renesas RZ/N1 MII converter" depends on OF && (ARCH_RZN1 || COMPILE_TEST) diff --git a/drivers/net/pcs/Makefile b/drivers/net/pcs/Makefile index 4f7920618b90..2fa3faf8a5db 100644 --- a/drivers/net/pcs/Makefile +++ b/drivers/net/pcs/Makefile @@ -7,4 +7,5 @@ pcs_xpcs-$(CONFIG_PCS_XPCS) := pcs-xpcs.o pcs-xpcs-plat.o \ obj-$(CONFIG_PCS_XPCS) += pcs_xpcs.o obj-$(CONFIG_PCS_LYNX) += pcs-lynx.o obj-$(CONFIG_PCS_MTK_LYNXI) += pcs-mtk-lynxi.o +obj-$(CONFIG_PCS_QCOM_IPQ9574) += pcs-qcom-ipq9574.o obj-$(CONFIG_PCS_RZN1_MIIC) += pcs-rzn1-miic.o diff --git a/drivers/net/pcs/pcs-qcom-ipq9574.c b/drivers/net/pcs/pcs-qcom-ipq9574.c new file mode 100644 index 000000000000..ea90c1902b61 --- /dev/null +++ b/drivers/net/pcs/pcs-qcom-ipq9574.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include + +#include + +#define XPCS_INDIRECT_ADDR 0x8000 +#define XPCS_INDIRECT_AHB_ADDR 0x83fc +#define XPCS_INDIRECT_ADDR_H GENMASK(20, 8) +#define XPCS_INDIRECT_ADDR_L GENMASK(7, 0) +#define XPCS_INDIRECT_DATA_ADDR(reg) (FIELD_PREP(GENMASK(15, 10), 0x20) | \ + FIELD_PREP(GENMASK(9, 2), \ + FIELD_GET(XPCS_INDIRECT_ADDR_L, reg))) + +/* PCS private data */ +struct ipq_pcs { + struct device *dev; + void __iomem *base; + struct regmap *regmap; + phy_interface_t interface; + + /* RX clock supplied to NSSCC */ + struct clk_hw rx_hw; + /* TX clock supplied to NSSCC */ + struct clk_hw tx_hw; +}; + +static unsigned long ipq_pcs_clk_rate_get(struct ipq_pcs *qpcs) +{ + switch (qpcs->interface) { + case PHY_INTERFACE_MODE_USXGMII: + return 312500000; + default: + return 125000000; + } +} + +/* Return clock rate for the RX clock supplied to NSSCC + * as per the interface mode. + */ +static unsigned long ipq_pcs_rx_clk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct ipq_pcs *qpcs = container_of(hw, struct ipq_pcs, rx_hw); + + return ipq_pcs_clk_rate_get(qpcs); +} + +/* Return clock rate for the TX clock supplied to NSSCC + * as per the interface mode. + */ +static unsigned long ipq_pcs_tx_clk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct ipq_pcs *qpcs = container_of(hw, struct ipq_pcs, tx_hw); + + return ipq_pcs_clk_rate_get(qpcs); +} + +static int ipq_pcs_clk_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + switch (req->rate) { + case 125000000: + case 312500000: + return 0; + default: + return -EINVAL; + } +} + +/* Clock ops for the RX clock supplied to NSSCC */ +static const struct clk_ops ipq_pcs_rx_clk_ops = { + .determine_rate = ipq_pcs_clk_determine_rate, + .recalc_rate = ipq_pcs_rx_clk_recalc_rate, +}; + +/* Clock ops for the TX clock supplied to NSSCC */ +static const struct clk_ops ipq_pcs_tx_clk_ops = { + .determine_rate = ipq_pcs_clk_determine_rate, + .recalc_rate = ipq_pcs_tx_clk_recalc_rate, +}; + +static struct clk_hw *ipq_pcs_clk_hw_get(struct of_phandle_args *clkspec, + void *data) +{ + struct ipq_pcs *qpcs = data; + + switch (clkspec->args[0]) { + case PCS_RX_CLK: + return &qpcs->rx_hw; + case PCS_TX_CLK: + return &qpcs->tx_hw; + } + + return ERR_PTR(-EINVAL); +} + +/* Register the RX and TX clock which are output from SerDes to + * the NSSCC. The NSSCC driver assigns the RX and TX clock as + * parent, divides them to generate the MII RX and TX clock to + * each MII interface of the PCS as per the link speeds and + * interface modes. + */ +static int ipq_pcs_clk_register(struct ipq_pcs *qpcs) +{ + struct clk_init_data init = { }; + int ret; + + init.ops = &ipq_pcs_rx_clk_ops; + init.name = devm_kasprintf(qpcs->dev, GFP_KERNEL, "%s::rx_clk", + dev_name(qpcs->dev)); + if (!init.name) + return -ENOMEM; + + qpcs->rx_hw.init = &init; + ret = devm_clk_hw_register(qpcs->dev, &qpcs->rx_hw); + if (ret) + return ret; + + init.ops = &ipq_pcs_tx_clk_ops; + init.name = devm_kasprintf(qpcs->dev, GFP_KERNEL, "%s::tx_clk", + dev_name(qpcs->dev)); + if (!init.name) + return -ENOMEM; + + qpcs->tx_hw.init = &init; + ret = devm_clk_hw_register(qpcs->dev, &qpcs->tx_hw); + if (ret) + return ret; + + return devm_of_clk_add_hw_provider(qpcs->dev, ipq_pcs_clk_hw_get, qpcs); +} + +static int ipq_pcs_regmap_read(void *context, unsigned int reg, + unsigned int *val) +{ + struct ipq_pcs *qpcs = context; + + /* PCS uses direct AHB access while XPCS uses indirect AHB access */ + if (reg >= XPCS_INDIRECT_ADDR) { + writel(FIELD_GET(XPCS_INDIRECT_ADDR_H, reg), + qpcs->base + XPCS_INDIRECT_AHB_ADDR); + *val = readl(qpcs->base + XPCS_INDIRECT_DATA_ADDR(reg)); + } else { + *val = readl(qpcs->base + reg); + } + + return 0; +} + +static int ipq_pcs_regmap_write(void *context, unsigned int reg, + unsigned int val) +{ + struct ipq_pcs *qpcs = context; + + /* PCS uses direct AHB access while XPCS uses indirect AHB access */ + if (reg >= XPCS_INDIRECT_ADDR) { + writel(FIELD_GET(XPCS_INDIRECT_ADDR_H, reg), + qpcs->base + XPCS_INDIRECT_AHB_ADDR); + writel(val, qpcs->base + XPCS_INDIRECT_DATA_ADDR(reg)); + } else { + writel(val, qpcs->base + reg); + } + + return 0; +} + +static const struct regmap_config ipq_pcs_regmap_cfg = { + .reg_bits = 32, + .val_bits = 32, + .reg_read = ipq_pcs_regmap_read, + .reg_write = ipq_pcs_regmap_write, + .fast_io = true, +}; + +static int ipq9574_pcs_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ipq_pcs *qpcs; + struct clk *clk; + int ret; + + qpcs = devm_kzalloc(dev, sizeof(*qpcs), GFP_KERNEL); + if (!qpcs) + return -ENOMEM; + + qpcs->dev = dev; + + qpcs->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(qpcs->base)) + return dev_err_probe(dev, PTR_ERR(qpcs->base), + "Failed to ioremap resource\n"); + + qpcs->regmap = devm_regmap_init(dev, NULL, qpcs, &ipq_pcs_regmap_cfg); + if (IS_ERR(qpcs->regmap)) + return dev_err_probe(dev, PTR_ERR(qpcs->regmap), + "Failed to allocate register map\n"); + + clk = devm_clk_get_enabled(dev, "sys"); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), + "Failed to enable SYS clock\n"); + + clk = devm_clk_get_enabled(dev, "ahb"); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), + "Failed to enable AHB clock\n"); + + ret = ipq_pcs_clk_register(qpcs); + if (ret) + return ret; + + platform_set_drvdata(pdev, qpcs); + + return 0; +} + +static const struct of_device_id ipq9574_pcs_of_mtable[] = { + { .compatible = "qcom,ipq9574-pcs" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ipq9574_pcs_of_mtable); + +static struct platform_driver ipq9574_pcs_driver = { + .driver = { + .name = "ipq9574_pcs", + .suppress_bind_attrs = true, + .of_match_table = ipq9574_pcs_of_mtable, + }, + .probe = ipq9574_pcs_probe, +}; +module_platform_driver(ipq9574_pcs_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Qualcomm IPQ9574 PCS driver"); +MODULE_AUTHOR("Lei Wei ");