From patchwork Tue Nov 2 05:41:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dylan Hung X-Patchwork-Id: 1549481 X-Patchwork-Delegate: rfried.dev@gmail.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=85.214.62.61; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4HjzK91cLXz9sVc for ; Tue, 2 Nov 2021 16:40:59 +1100 (AEDT) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 7DD9983535; Tue, 2 Nov 2021 06:40:52 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=aspeedtech.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id B4A8B835CA; Tue, 2 Nov 2021 06:40:50 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, T_SPF_HELO_TEMPERROR, T_SPF_TEMPERROR autolearn=ham autolearn_force=no version=3.4.2 Received: from twspam01.aspeedtech.com (twspam01.aspeedtech.com [211.20.114.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id CB25D8352D for ; Tue, 2 Nov 2021 06:40:46 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=aspeedtech.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=dylan_hung@aspeedtech.com Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 1A25Hp2Z042974; Tue, 2 Nov 2021 13:17:51 +0800 (GMT-8) (envelope-from dylan_hung@aspeedtech.com) Received: from DylanHung-PC.aspeed.com (192.168.2.216) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 2 Nov 2021 13:40:38 +0800 From: Dylan Hung To: , , , , CC: Subject: [PATCH] drivers: net: add Aspeed MDIO driver Date: Tue, 2 Nov 2021 13:41:54 +0800 Message-ID: <20211102054154.4880-1-dylan_hung@aspeedtech.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [192.168.2.216] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 1A25Hp2Z042974 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.34 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.2 at phobos.denx.de X-Virus-Status: Clean Add a driver for the MDIO interface for Aspeed AST2600 SOC. The driver only supports clause 22 for now. Signed-off-by: Dylan Hung Reviewed-by: Ramon Fried Reviewed-by: Ryan Chen --- drivers/net/Kconfig | 7 +++ drivers/net/Makefile | 1 + drivers/net/aspeed_mdio.c | 128 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 136 insertions(+) create mode 100644 drivers/net/aspeed_mdio.c diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 6c12959f37..4638180b74 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -826,6 +826,13 @@ config FSL_LS_MDIO This driver supports the MDIO bus found on the Fman 10G Ethernet MACs and on the mEMAC (which supports both Clauses 22 and 45). +config ASPEED_MDIO + bool "Aspeed MDIO interface support" + depends on DM_MDIO + help + This driver supports the MDIO bus of Aspeed AST2600 SOC. The driver + currently supports Clause 22. + config MDIO_MUX_MMIOREG bool "MDIO MUX accessed as a MMIO register access" depends on DM_MDIO_MUX diff --git a/drivers/net/Makefile b/drivers/net/Makefile index e4078d15a9..fe6c00fa48 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -101,3 +101,4 @@ obj-$(CONFIG_HIGMACV300_ETH) += higmacv300.o obj-$(CONFIG_MDIO_SANDBOX) += mdio_sandbox.o obj-$(CONFIG_FSL_ENETC) += fsl_enetc.o fsl_enetc_mdio.o obj-$(CONFIG_FSL_LS_MDIO) += fsl_ls_mdio.o +obj-$(CONFIG_ASPEED_MDIO) += aspeed_mdio.o diff --git a/drivers/net/aspeed_mdio.c b/drivers/net/aspeed_mdio.c new file mode 100644 index 0000000000..a99715a728 --- /dev/null +++ b/drivers/net/aspeed_mdio.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Aspeed MDIO driver + * + * (C) Copyright 2021 Aspeed Technology Inc. + * + * This file is inspired from the Linux kernel driver drivers/net/phy/mdio-aspeed.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ASPEED_MDIO_CTRL 0x0 +#define ASPEED_MDIO_CTRL_FIRE BIT(31) +#define ASPEED_MDIO_CTRL_ST BIT(28) +#define ASPEED_MDIO_CTRL_ST_C45 0 +#define ASPEED_MDIO_CTRL_ST_C22 1 +#define ASPEED_MDIO_CTRL_OP GENMASK(27, 26) +#define MDIO_C22_OP_WRITE 0b01 +#define MDIO_C22_OP_READ 0b10 +#define ASPEED_MDIO_CTRL_PHYAD GENMASK(25, 21) +#define ASPEED_MDIO_CTRL_REGAD GENMASK(20, 16) +#define ASPEED_MDIO_CTRL_MIIWDATA GENMASK(15, 0) + +#define ASPEED_MDIO_DATA 0x4 +#define ASPEED_MDIO_DATA_MDC_THRES GENMASK(31, 24) +#define ASPEED_MDIO_DATA_MDIO_EDGE BIT(23) +#define ASPEED_MDIO_DATA_MDIO_LATCH GENMASK(22, 20) +#define ASPEED_MDIO_DATA_IDLE BIT(16) +#define ASPEED_MDIO_DATA_MIIRDATA GENMASK(15, 0) + +#define ASPEED_MDIO_TIMEOUT_US 1000 + +struct aspeed_mdio_priv { + void *base; +}; + +static int aspeed_mdio_read(struct udevice *mdio_dev, int addr, int devad, int reg) +{ + struct aspeed_mdio_priv *priv = dev_get_priv(mdio_dev); + u32 ctrl; + u32 data; + int rc; + + if (devad != MDIO_DEVAD_NONE) + return -EOPNOTSUPP; + + ctrl = ASPEED_MDIO_CTRL_FIRE + | FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22) + | FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_READ) + | FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr) + | FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, reg); + + writel(ctrl, priv->base + ASPEED_MDIO_CTRL); + + rc = readl_poll_timeout(priv->base + ASPEED_MDIO_DATA, data, + data & ASPEED_MDIO_DATA_IDLE, + ASPEED_MDIO_TIMEOUT_US); + + if (rc < 0) + return rc; + + return FIELD_GET(ASPEED_MDIO_DATA_MIIRDATA, data); +} + +static int aspeed_mdio_write(struct udevice *mdio_dev, int addr, int devad, int reg, u16 val) +{ + struct aspeed_mdio_priv *priv = dev_get_priv(mdio_dev); + u32 ctrl; + + if (devad != MDIO_DEVAD_NONE) + return -EOPNOTSUPP; + + ctrl = ASPEED_MDIO_CTRL_FIRE + | FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22) + | FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_WRITE) + | FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr) + | FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, reg) + | FIELD_PREP(ASPEED_MDIO_CTRL_MIIWDATA, val); + + writel(ctrl, priv->base + ASPEED_MDIO_CTRL); + + return readl_poll_timeout(priv->base + ASPEED_MDIO_CTRL, ctrl, + !(ctrl & ASPEED_MDIO_CTRL_FIRE), + ASPEED_MDIO_TIMEOUT_US); +} + +static const struct mdio_ops aspeed_mdio_ops = { + .read = aspeed_mdio_read, + .write = aspeed_mdio_write, +}; + +static int aspeed_mdio_probe(struct udevice *dev) +{ + struct aspeed_mdio_priv *priv = dev_get_priv(dev); + struct reset_ctl reset_ctl; + int ret = 0; + + priv->base = dev_read_addr_ptr(dev); + + ret = reset_get_by_index(dev, 0, &reset_ctl); + reset_deassert(&reset_ctl); + + return 0; +} + +static const struct udevice_id aspeed_mdio_ids[] = { + { .compatible = "aspeed,ast2600-mdio" }, + { } +}; + +U_BOOT_DRIVER(aspeed_mdio) = { + .name = "aspeed_mdio", + .id = UCLASS_MDIO, + .of_match = aspeed_mdio_ids, + .probe = aspeed_mdio_probe, + .ops = &aspeed_mdio_ops, + .plat_auto = sizeof(struct mdio_perdev_priv), + .priv_auto = sizeof(struct aspeed_mdio_priv), +};