From patchwork Thu Dec 13 01:56:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?QmlhbyBIdWFuZyAo6buE5b2qKQ==?= X-Patchwork-Id: 10727527 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9B67A13AF for ; Thu, 13 Dec 2018 01:57:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88FB82A269 for ; Thu, 13 Dec 2018 01:57:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7D01A2A36D; Thu, 13 Dec 2018 01:57:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A27302A38C for ; Thu, 13 Dec 2018 01:57:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=14icwl3RM9Yx+RjDVVuYfsjg+BTaoFM7MOnLQet1noA=; b=aMXIlHvnPEKfak HJiP9qF3rw9cJqewlAMq3mfk9Rg5WqZqcllgActvmO5uy3ADkDqFSlIWzDLqns/Xv9LwsDVN/nNOi naIR6Oa2oNrNJ945HT96sJWC2K9g3Pq2rYKbnaG19eYeaujEi0K+0eOqG6hGh1f8BhCNqTtppO8Hx 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13 Dec 2018 09:56:20 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 13 Dec 2018 09:56:19 +0800 From: Biao Huang To: , Subject: [v7, PATCH 1/2] net:stmmac: dwmac-mediatek: add support for mt2712 Date: Thu, 13 Dec 2018 09:56:12 +0800 Message-ID: <1544666173-5121-2-git-send-email-biao.huang@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1544666173-5121-1-git-send-email-biao.huang@mediatek.com> References: <1544666173-5121-1-git-send-email-biao.huang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181212_175650_852463_10A2874C X-CRM114-Status: GOOD ( 20.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, nelson.chang@mediatek.com, andrew@lunn.ch, biao.huang@mediatek.com, netdev@vger.kernel.org, liguo.zhang@mediatek.com, linux-kernel@vger.kernel.org, matthias.bgg@gmail.com, joabreu@synopsys.com, linux-mediatek@lists.infradead.org, honghui.zhang@mediatek.com, yt.shen@mediatek.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add Ethernet support for MediaTek SoCs from the mt2712 family Signed-off-by: Biao Huang --- drivers/net/ethernet/stmicro/stmmac/Kconfig | 8 + drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c | 413 ++++++++++++++++++++ 3 files changed, 422 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 324049e..6209cc1 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -75,6 +75,14 @@ config DWMAC_LPC18XX ---help--- Support for NXP LPC18xx/43xx DWMAC Ethernet. +config DWMAC_MEDIATEK + tristate "MediaTek MT27xx GMAC support" + depends on OF && (ARCH_MEDIATEK || COMPILE_TEST) + help + Support for MediaTek GMAC Ethernet controller. + + This selects the MT2712 SoC support for the stmmac driver. + config DWMAC_MESON tristate "Amlogic Meson dwmac support" default ARCH_MESON diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 99967a8..bf09701 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_STMMAC_PLATFORM) += stmmac-platform.o obj-$(CONFIG_DWMAC_ANARION) += dwmac-anarion.o obj-$(CONFIG_DWMAC_IPQ806X) += dwmac-ipq806x.o obj-$(CONFIG_DWMAC_LPC18XX) += dwmac-lpc18xx.o +obj-$(CONFIG_DWMAC_MEDIATEK) += dwmac-mediatek.o obj-$(CONFIG_DWMAC_MESON) += dwmac-meson.o dwmac-meson8b.o obj-$(CONFIG_DWMAC_OXNAS) += dwmac-oxnas.o obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c new file mode 100644 index 0000000..e400cbd --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c @@ -0,0 +1,413 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2018 MediaTek Inc. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "stmmac.h" +#include "stmmac_platform.h" + +/* Peri Configuration register for mt2712 */ +#define PERI_ETH_PHY_INTF_SEL 0x418 +#define PHY_INTF_MII 0 +#define PHY_INTF_RGMII 1 +#define PHY_INTF_RMII 4 +#define RMII_CLK_SRC_RXC BIT(4) +#define RMII_CLK_SRC_INTERNAL BIT(5) + +#define PERI_ETH_DLY 0x428 +#define ETH_DLY_GTXC_INV BIT(6) +#define ETH_DLY_GTXC_ENABLE BIT(5) +#define ETH_DLY_GTXC_STAGES GENMASK(4, 0) +#define ETH_DLY_TXC_INV BIT(20) +#define ETH_DLY_TXC_ENABLE BIT(19) +#define ETH_DLY_TXC_STAGES GENMASK(18, 14) +#define ETH_DLY_RXC_INV BIT(13) +#define ETH_DLY_RXC_ENABLE BIT(12) +#define ETH_DLY_RXC_STAGES GENMASK(11, 7) + +#define PERI_ETH_DLY_FINE 0x800 +#define ETH_RMII_DLY_TX_INV BIT(2) +#define ETH_FINE_DLY_GTXC BIT(1) +#define ETH_FINE_DLY_RXC BIT(0) + +struct mac_delay_struct { + u32 tx_delay; + u32 rx_delay; + bool tx_inv; + bool rx_inv; + bool fine_tune; +}; + +struct mediatek_dwmac_plat_data { + const struct mediatek_dwmac_variant *variant; + struct mac_delay_struct mac_delay; + struct clk_bulk_data *clks; + struct device_node *np; + struct regmap *peri_regmap; + struct device *dev; + int phy_mode; + bool rmii_rxc; +}; + +struct mediatek_dwmac_variant { + int (*dwmac_set_phy_interface)(struct mediatek_dwmac_plat_data *plat); + int (*dwmac_set_delay)(struct mediatek_dwmac_plat_data *plat); + + /* clock ids to be requested */ + const char * const *clk_list; + int num_clks; + + u32 dma_bit_mask; + u32 rx_delay_max; + u32 tx_delay_max; +}; + +/* list of clocks required for mac */ +static const char * const mt2712_dwmac_clk_l[] = { + "axi", "apb", "mac_main", "ptp_ref" +}; + +static int mt2712_set_interface(struct mediatek_dwmac_plat_data *plat) +{ + int rmii_rxc = plat->rmii_rxc ? RMII_CLK_SRC_RXC : 0; + u32 intf_val = 0; + + /* select phy interface in top control domain */ + switch (plat->phy_mode) { + case PHY_INTERFACE_MODE_MII: + intf_val |= PHY_INTF_MII; + break; + case PHY_INTERFACE_MODE_RMII: + intf_val |= (PHY_INTF_RMII | rmii_rxc); + break; + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_TXID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_ID: + intf_val |= PHY_INTF_RGMII; + break; + default: + dev_err(plat->dev, "phy interface not supported\n"); + return -EINVAL; + } + + regmap_write(plat->peri_regmap, PERI_ETH_PHY_INTF_SEL, intf_val); + + return 0; +} + +static void mt2712_delay_ps2stage(struct mac_delay_struct *mac_delay) +{ + if (mac_delay->fine_tune) { + /* 170ps per stage for fine tune delay macro circuit*/ + mac_delay->tx_delay /= 170; + mac_delay->rx_delay /= 170; + } else { + /* 550ps per stage for coarse tune delay macro circuit*/ + mac_delay->tx_delay /= 550; + mac_delay->rx_delay /= 550; + } +} + +static int mt2712_set_delay(struct mediatek_dwmac_plat_data *plat) +{ + struct mac_delay_struct *mac_delay = &plat->mac_delay; + u32 delay_val = 0, fine_val = 0; + + mt2712_delay_ps2stage(mac_delay); + + switch (plat->phy_mode) { + case PHY_INTERFACE_MODE_MII: + delay_val |= FIELD_PREP(ETH_DLY_TXC_ENABLE, !!mac_delay->tx_delay); + delay_val |= FIELD_PREP(ETH_DLY_TXC_STAGES, mac_delay->tx_delay); + delay_val |= FIELD_PREP(ETH_DLY_TXC_INV, mac_delay->tx_inv); + + delay_val |= FIELD_PREP(ETH_DLY_RXC_ENABLE, !!mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_STAGES, mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_INV, mac_delay->rx_inv); + break; + case PHY_INTERFACE_MODE_RMII: + /* the rmii reference clock is from external phy, + * and the property "rmii_rxc" indicates which pin(TXC/RXC) + * the reference clk is connected to. The reference clock is a + * received signal, so rx_delay/rx_inv are used to indicate + * the reference clock timing adjustment + */ + if (plat->rmii_rxc) { + /* the rmii reference clock from outside is connected + * to RXC pin, the reference clock will be adjusted + * by RXC delay macro circuit. + */ + delay_val |= FIELD_PREP(ETH_DLY_RXC_ENABLE, !!mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_STAGES, mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_INV, mac_delay->rx_inv); + } else { + /* the rmii reference clock from outside is connected + * to TXC pin, the reference clock will be adjusted + * by TXC delay macro circuit. + */ + delay_val |= FIELD_PREP(ETH_DLY_TXC_ENABLE, !!mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_TXC_STAGES, mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_TXC_INV, mac_delay->rx_inv); + } + /* tx_inv will inverse the tx clock inside mac relateive to + * reference clock from external phy, + * and this bit is located in the same register with fine-tune + */ + if (mac_delay->tx_inv) + fine_val = ETH_RMII_DLY_TX_INV; + break; + case PHY_INTERFACE_MODE_RGMII: + /* the PHY is not responsible for inserting any internal + * delay by itself in PHY_INTERFACE_MODE_RGMII case, + * so Ethernet MAC will insert delays for both transmit + * and receive path here. + */ + if (mac_delay->fine_tune) + fine_val = ETH_FINE_DLY_GTXC | ETH_FINE_DLY_RXC; + + delay_val |= FIELD_PREP(ETH_DLY_GTXC_ENABLE, !!mac_delay->tx_delay); + delay_val |= FIELD_PREP(ETH_DLY_GTXC_STAGES, mac_delay->tx_delay); + delay_val |= FIELD_PREP(ETH_DLY_GTXC_INV, mac_delay->tx_inv); + + delay_val |= FIELD_PREP(ETH_DLY_RXC_ENABLE, !!mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_STAGES, mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_INV, mac_delay->rx_inv); + break; + case PHY_INTERFACE_MODE_RGMII_TXID: + /* the PHY should insert an internal delay for the transmit + * path in PHY_INTERFACE_MODE_RGMII_TXID case, + * so Ethernet MAC will insert the delay for receive path here. + */ + if (mac_delay->fine_tune) + fine_val = ETH_FINE_DLY_RXC; + + delay_val |= FIELD_PREP(ETH_DLY_RXC_ENABLE, !!mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_STAGES, mac_delay->rx_delay); + delay_val |= FIELD_PREP(ETH_DLY_RXC_INV, mac_delay->rx_inv); + break; + case PHY_INTERFACE_MODE_RGMII_RXID: + /* the PHY should insert an internal delay for the receive + * path in PHY_INTERFACE_MODE_RGMII_RXID case, + * so Ethernet MAC will insert the delay for transmit path here. + */ + if (mac_delay->fine_tune) + fine_val = ETH_FINE_DLY_GTXC; + + delay_val |= FIELD_PREP(ETH_DLY_GTXC_ENABLE, !!mac_delay->tx_delay); + delay_val |= FIELD_PREP(ETH_DLY_GTXC_STAGES, mac_delay->tx_delay); + delay_val |= FIELD_PREP(ETH_DLY_GTXC_INV, mac_delay->tx_inv); + break; + case PHY_INTERFACE_MODE_RGMII_ID: + /* the PHY should insert internal delays for both transmit + * and receive path in PHY_INTERFACE_MODE_RGMII_RXID case, + * so Ethernet MAC will NOT insert any delay here. + */ + break; + default: + dev_err(plat->dev, "phy interface not supported\n"); + return -EINVAL; + } + regmap_write(plat->peri_regmap, PERI_ETH_DLY, delay_val); + regmap_write(plat->peri_regmap, PERI_ETH_DLY_FINE, fine_val); + + return 0; +} + +static const struct mediatek_dwmac_variant mt2712_gmac_variant = { + .dwmac_set_phy_interface = mt2712_set_interface, + .dwmac_set_delay = mt2712_set_delay, + .clk_list = mt2712_dwmac_clk_l, + .num_clks = ARRAY_SIZE(mt2712_dwmac_clk_l), + .dma_bit_mask = 33, + .rx_delay_max = 17600, + .tx_delay_max = 17600, +}; + +static int mediatek_dwmac_config_dt(struct mediatek_dwmac_plat_data *plat) +{ + struct mac_delay_struct *mac_delay = &plat->mac_delay; + u32 tx_delay_ps, rx_delay_ps; + + plat->peri_regmap = syscon_regmap_lookup_by_phandle(plat->np, "mediatek,pericfg"); + if (IS_ERR(plat->peri_regmap)) { + dev_err(plat->dev, "Failed to get pericfg syscon\n"); + return PTR_ERR(plat->peri_regmap); + } + + plat->phy_mode = of_get_phy_mode(plat->np); + if (plat->phy_mode < 0) { + dev_err(plat->dev, "not find phy-mode\n"); + return -EINVAL; + } + + if (!of_property_read_u32(plat->np, "mediatek,tx-delay-ps", &tx_delay_ps)) { + if (tx_delay_ps < plat->variant->tx_delay_max) { + mac_delay->tx_delay = tx_delay_ps; + } else { + dev_err(plat->dev, "Invalid TX clock delay: %dps\n", tx_delay_ps); + return -EINVAL; + } + } + + if (!of_property_read_u32(plat->np, "mediatek,rx-delay-ps", &rx_delay_ps)) { + if (rx_delay_ps < plat->variant->rx_delay_max) { + mac_delay->rx_delay = rx_delay_ps; + } else { + dev_err(plat->dev, "Invalid RX clock delay: %dps\n", rx_delay_ps); + return -EINVAL; + } + } + + mac_delay->tx_inv = of_property_read_bool(plat->np, "mediatek,txc-inverse"); + mac_delay->rx_inv = of_property_read_bool(plat->np, "mediatek,rxc-inverse"); + mac_delay->fine_tune = of_property_read_bool(plat->np, "mediatek,fine-tune"); + plat->rmii_rxc = of_property_read_bool(plat->np, "mediatek,rmii-rxc"); + + return 0; +} + +static int mediatek_dwmac_clk_init(struct mediatek_dwmac_plat_data *plat) +{ + const struct mediatek_dwmac_variant *variant = plat->variant; + int i, num = variant->num_clks; + + plat->clks = devm_kcalloc(plat->dev, num, sizeof(*plat->clks), GFP_KERNEL); + if (!plat->clks) + return -ENOMEM; + + for (i = 0; i < num; i++) + plat->clks[i].id = variant->clk_list[i]; + + return devm_clk_bulk_get(plat->dev, num, plat->clks); +} + +static int mediatek_dwmac_init(struct platform_device *pdev, void *priv) +{ + struct mediatek_dwmac_plat_data *plat = priv; + const struct mediatek_dwmac_variant *variant = plat->variant; + int ret; + + ret = dma_set_mask_and_coherent(plat->dev, DMA_BIT_MASK(variant->dma_bit_mask)); + if (ret) { + dev_err(plat->dev, "No suitable DMA available, err = %d\n", ret); + return ret; + } + + ret = variant->dwmac_set_phy_interface(plat); + if (ret) { + dev_err(plat->dev, "failed to set phy interface, err = %d\n", ret); + return ret; + } + + ret = variant->dwmac_set_delay(plat); + if (ret) { + dev_err(plat->dev, "failed to set delay value, err = %d\n", ret); + return ret; + } + + ret = clk_bulk_prepare_enable(variant->num_clks, plat->clks); + if (ret) { + dev_err(plat->dev, "failed to enable clks, err = %d\n", ret); + return ret; + } + + return 0; +} + +static void mediatek_dwmac_exit(struct platform_device *pdev, void *priv) +{ + struct mediatek_dwmac_plat_data *plat = priv; + const struct mediatek_dwmac_variant *variant = plat->variant; + + clk_bulk_disable_unprepare(variant->num_clks, plat->clks); +} + +static int mediatek_dwmac_probe(struct platform_device *pdev) +{ + struct mediatek_dwmac_plat_data *priv_plat; + struct plat_stmmacenet_data *plat_dat; + struct stmmac_resources stmmac_res; + int ret; + + priv_plat = devm_kzalloc(&pdev->dev, sizeof(*priv_plat), GFP_KERNEL); + if (!priv_plat) + return -ENOMEM; + + priv_plat->variant = of_device_get_match_data(&pdev->dev); + if (!priv_plat->variant) { + dev_err(&pdev->dev, "Missing dwmac-mediatek variant\n"); + return -EINVAL; + } + + priv_plat->dev = &pdev->dev; + priv_plat->np = pdev->dev.of_node; + + ret = mediatek_dwmac_config_dt(priv_plat); + if (ret) + return ret; + + ret = mediatek_dwmac_clk_init(priv_plat); + if (ret) + return ret; + + ret = stmmac_get_platform_resources(pdev, &stmmac_res); + if (ret) + return ret; + + plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac); + if (IS_ERR(plat_dat)) + return PTR_ERR(plat_dat); + + plat_dat->interface = priv_plat->phy_mode; + /* clk_csr_i = 250-300MHz & MDC = clk_csr_i/124 */ + plat_dat->clk_csr = 5; + plat_dat->has_gmac4 = 1; + plat_dat->has_gmac = 0; + plat_dat->pmt = 0; + plat_dat->maxmtu = ETH_DATA_LEN; + plat_dat->bsp_priv = priv_plat; + plat_dat->init = mediatek_dwmac_init; + plat_dat->exit = mediatek_dwmac_exit; + mediatek_dwmac_init(pdev, priv_plat); + + ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res); + if (ret) { + stmmac_remove_config_dt(pdev, plat_dat); + return ret; + } + + return 0; +} + +static const struct of_device_id mediatek_dwmac_match[] = { + { .compatible = "mediatek,mt2712-gmac", + .data = &mt2712_gmac_variant }, + { } +}; + +MODULE_DEVICE_TABLE(of, mediatek_dwmac_match); + +static struct platform_driver mediatek_dwmac_driver = { + .probe = mediatek_dwmac_probe, + .remove = stmmac_pltfr_remove, + .driver = { + .name = "dwmac-mediatek", + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = mediatek_dwmac_match, + }, +}; +module_platform_driver(mediatek_dwmac_driver); + +MODULE_AUTHOR("Biao Huang "); +MODULE_DESCRIPTION("MediaTek DWMAC specific glue layer"); +MODULE_LICENSE("GPL v2"); From patchwork Thu Dec 13 01:56:13 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?QmlhbyBIdWFuZyAo6buE5b2qKQ==?= X-Patchwork-Id: 10727523 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 04D7313AF for ; Thu, 13 Dec 2018 01:57:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E6B6B2968F for ; Thu, 13 Dec 2018 01:57:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D71F42A36D; Thu, 13 Dec 2018 01:57:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6F48A2968F for ; 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Thu, 13 Dec 2018 01:57:12 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gXGF8-00074D-E1; Thu, 13 Dec 2018 01:56:53 +0000 X-UUID: 503c09e2c30c4f56912b463af71065de-20181213 X-UUID: 503c09e2c30c4f56912b463af71065de-20181213 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 856517064; Thu, 13 Dec 2018 09:56:22 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 13 Dec 2018 09:56:21 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 13 Dec 2018 09:56:20 +0800 From: Biao Huang To: , Subject: [v7, PATCH 2/2] dt-binding: mediatek-dwmac: add binding document for MediaTek MT2712 DWMAC Date: Thu, 13 Dec 2018 09:56:13 +0800 Message-ID: <1544666173-5121-3-git-send-email-biao.huang@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1544666173-5121-1-git-send-email-biao.huang@mediatek.com> References: <1544666173-5121-1-git-send-email-biao.huang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181212_175650_726299_16A67164 X-CRM114-Status: GOOD ( 12.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, nelson.chang@mediatek.com, andrew@lunn.ch, biao.huang@mediatek.com, netdev@vger.kernel.org, liguo.zhang@mediatek.com, linux-kernel@vger.kernel.org, matthias.bgg@gmail.com, joabreu@synopsys.com, linux-mediatek@lists.infradead.org, honghui.zhang@mediatek.com, yt.shen@mediatek.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The commit adds the device tree binding documentation for the MediaTek DWMAC found on MediaTek MT2712. Signed-off-by: Biao Huang --- .../devicetree/bindings/net/mediatek-dwmac.txt | 87 ++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/mediatek-dwmac.txt diff --git a/Documentation/devicetree/bindings/net/mediatek-dwmac.txt b/Documentation/devicetree/bindings/net/mediatek-dwmac.txt new file mode 100644 index 0000000..4de479b --- /dev/null +++ b/Documentation/devicetree/bindings/net/mediatek-dwmac.txt @@ -0,0 +1,87 @@ +MediaTek DWMAC glue layer controller + +This file documents platform glue layer for stmmac. +Please see stmmac.txt for the other unchanged properties. + +The device node has following properties. + +Required properties: +- compatible: Should be "mediatek,mt2712-gmac" for MT2712 SoC +- reg: Address and length of the register set for the device +- interrupts: Should contain the MAC interrupts +- interrupt-names: Should contain a list of interrupt names corresponding to + the interrupts in the interrupts property, if available. + Should be "macirq" for the main MAC IRQ +- clocks: Must contain a phandle for each entry in clock-names. +- clock-names: The name of the clock listed in the clocks property. These are + "axi", "apb", "mac_main", "ptp_ref" for MT2712 SoC +- mac-address: See ethernet.txt in the same directory +- phy-mode: See ethernet.txt in the same directory +- mediatek,pericfg: A phandle to the syscon node that control ethernet + interface and timing delay. + +Optional properties: +- mediatek,tx-delay-ps: TX clock delay macro value. Default is 0. + It should be defined for rgmii/rgmii-rxid/mii interface. +- mediatek,rx-delay-ps: RX clock delay macro value. Default is 0. + It should be defined for rgmii/rgmii-txid/mii/rmii interface. +Both delay properties need to be a multiple of 170 for fine-tune rgmii, +range 0~31*170. +Both delay properties need to be a multiple of 550 for coarse-tune rgmii, +range 0~31*550. +Both delay properties need to be a multiple of 550 for mii/rmii, +range 0~31*550. + +- mediatek,fine-tune: boolean property, if present indicates that fine delay + is selected for rgmii interface. + If present, tx-delay-ps/rx-delay-ps is 170+/-50ps per stage. + Else tx-delay-ps/rx-delay-ps of coarse delay macro is 0.55+/-0.2ns per stage. + This property do not apply to non-rgmii PHYs. + Only coarse-tune delay is supported for mii/rmii PHYs. +- mediatek,rmii-rxc: boolean property, if present indicates that the rmii + reference clock, which is from external PHYs, is connected to RXC pin + on MT2712 SoC. + Otherwise, is connected to TXC pin. +- mediatek,txc-inverse: boolean property, if present indicates that + 1. tx clock will be inversed in mii/rgmii case, + 2. tx clock inside MAC will be inversed relative to reference clock + which is from external PHYs in rmii case, and it rarely happen. +- mediatek,rxc-inverse: boolean property, if present indicates that + 1. rx clock will be inversed in mii/rgmii case. + 2. reference clock will be inversed when arrived at MAC in rmii case. +- assigned-clocks: mac_main and ptp_ref clocks +- assigned-clock-parents: parent clocks of the assigned clocks + +Example: + eth: ethernet@1101c000 { + compatible = "mediatek,mt2712-gmac"; + reg = <0 0x1101c000 0 0x1300>; + interrupts = ; + interrupt-names = "macirq"; + phy-mode ="rgmii"; + mac-address = [00 55 7b b5 7d f7]; + clock-names = "axi", + "apb", + "mac_main", + "ptp_ref", + "ptp_top"; + clocks = <&pericfg CLK_PERI_GMAC>, + <&pericfg CLK_PERI_GMAC_PCLK>, + <&topckgen CLK_TOP_ETHER_125M_SEL>, + <&topckgen CLK_TOP_ETHER_50M_SEL>; + assigned-clocks = <&topckgen CLK_TOP_ETHER_125M_SEL>, + <&topckgen CLK_TOP_ETHER_50M_SEL>; + assigned-clock-parents = <&topckgen CLK_TOP_ETHERPLL_125M>, + <&topckgen CLK_TOP_APLL1_D3>; + mediatek,pericfg = <&pericfg>; + mediatek,tx-delay-ps = <1530>; + mediatek,rx-delay-ps = <1530>; + mediatek,fine-tune; + mediatek,rmii-rxc; + mediatek,txc-inverse; + mediatek,rxc-inverse; + snps,txpbl = <32>; + snps,rxpbl = <32>; + snps,reset-gpio = <&pio 87 GPIO_ACTIVE_LOW>; + snps,reset-active-low; + };