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b=TpKSTQLZDy53Y0BrQuYzouG+eu2g6mT36KmL18zLDl4MNjO/AWdOuvEDLIoHFmJM2OkN8SADo/eorklImKgZnTuN3roGl2+5ug4B8UfrrLFSxEKgBF4zJ+kpnYTFooybW+XpXXlaUuRut+fhHKci0omZTBbwS28WeCsAyAnAUhU= Received: from MW4PR18MB5084.namprd18.prod.outlook.com (2603:10b6:303:1a7::8) by SJ2PR18MB5787.namprd18.prod.outlook.com (2603:10b6:a03:577::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8207.14; Fri, 29 Nov 2024 15:01:18 +0000 Received: from MW4PR18MB5084.namprd18.prod.outlook.com ([fe80::1fe2:3c84:eebf:a905]) by MW4PR18MB5084.namprd18.prod.outlook.com ([fe80::1fe2:3c84:eebf:a905%7]) with mapi id 15.20.8207.010; Fri, 29 Nov 2024 15:01:18 +0000 Message-ID: <2467884e-9a49-4ab1-9c57-fe58f619048d@marvell.com> Date: Fri, 29 Nov 2024 20:31:37 +0530 User-Agent: Mozilla Thunderbird Subject: [PATCH 3/5] phy: fsl-imx8mq-usb: add tca function driver for imx95 To: Xu Yang , vkoul@kernel.org, kishon@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, gregkh@linuxfoundation.org, Frank.Li@nxp.com, jun.li@nxp.com, l.stach@pengutronix.de, aford173@gmail.com, hongxing.zhu@nxp.com, alexander.stein@ew.tq-group.com Cc: linux-phy@lists.infradead.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org References: <20240802091702.2057294-1-xu.yang_2@nxp.com> <20240802091702.2057294-3-xu.yang_2@nxp.com> Content-Language: en-US From: Amit Singh Tomar In-Reply-To: <20240802091702.2057294-3-xu.yang_2@nxp.com> X-ClientProxiedBy: PN3PR01CA0085.INDPRD01.PROD.OUTLOOK.COM (2603:1096:c01:9a::21) To MW4PR18MB5084.namprd18.prod.outlook.com (2603:10b6:303:1a7::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MW4PR18MB5084:EE_|SJ2PR18MB5787:EE_ X-MS-Office365-Filtering-Correlation-Id: 40ab0190-60e9-48ce-1592-08dd1086ad8a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014|7053199007|921020; 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charset="us-ascii"; Format="flowed" Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Hi, > The i.MX95 USB3 phy has a Type-C Assist block (TCA). This block consists > two functional blocks (XBar assist and VBus assist) and one system > access interface using APB. > > The primary functionality of XBar assist is: > - switching lane for flip > - moving unused lanes into lower power states. > > This info can be get from: > i.MX95 RM Chapter 163.3.8 Type-C assist (TCA) block. > > This will add support for TCA block to achieve lane switching and tca > lower power functionality. > > Signed-off-by: Xu Yang > Reviewed-by: Jun Li > --- > drivers/phy/freescale/Kconfig | 1 + > drivers/phy/freescale/phy-fsl-imx8mq-usb.c | 238 +++++++++++++++++++++ > 2 files changed, 239 insertions(+) > > diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig > index dcd9acff6d01..81f53564ee15 100644 > --- a/drivers/phy/freescale/Kconfig > +++ b/drivers/phy/freescale/Kconfig > @@ -5,6 +5,7 @@ if (ARCH_MXC && ARM64) || COMPILE_TEST > config PHY_FSL_IMX8MQ_USB > tristate "Freescale i.MX8M USB3 PHY" > depends on OF && HAS_IOMEM > + depends on TYPEC || TYPEC=n > select GENERIC_PHY > default ARCH_MXC && ARM64 > > diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c > index adc6394626ce..18d00cec0665 100644 > --- a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c > +++ b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c > @@ -10,6 +10,7 @@ > #include > #include > #include > +#include > > #define PHY_CTRL0 0x0 > #define PHY_CTRL0_REF_SSP_EN BIT(2) > @@ -50,11 +51,66 @@ > > #define PHY_TUNE_DEFAULT 0xffffffff > > +#define TCA_CLK_RST 0x00 > +#define TCA_CLK_RST_SW BIT(9) > +#define TCA_CLK_RST_REF_CLK_EN BIT(1) > +#define TCA_CLK_RST_SUSPEND_CLK_EN BIT(0) > + > +#define TCA_INTR_EN 0x04 > +#define TCA_INTR_STS 0x08 > + > +#define TCA_GCFG 0x10 > +#define TCA_GCFG_ROLE_HSTDEV BIT(4) > +#define TCA_GCFG_OP_MODE GENMASK(1, 0) > +#define TCA_GCFG_OP_MODE_SYSMODE 0 > +#define TCA_GCFG_OP_MODE_SYNCMODE 1 > + > +#define TCA_TCPC 0x14 > +#define TCA_TCPC_VALID BIT(4) > +#define TCA_TCPC_LOW_POWER_EN BIT(3) > +#define TCA_TCPC_ORIENTATION_NORMAL BIT(2) > +#define TCA_TCPC_MUX_CONTRL GENMASK(1, 0) > +#define TCA_TCPC_MUX_CONTRL_NO_CONN 0 > +#define TCA_TCPC_MUX_CONTRL_USB_CONN 1 > + > +#define TCA_SYSMODE_CFG 0x18 > +#define TCA_SYSMODE_TCPC_DISABLE BIT(3) > +#define TCA_SYSMODE_TCPC_FLIP BIT(2) > + > +#define TCA_CTRLSYNCMODE_CFG0 0x20 > +#define TCA_CTRLSYNCMODE_CFG1 0x20 > + > +#define TCA_PSTATE 0x30 > +#define TCA_PSTATE_CM_STS BIT(4) > +#define TCA_PSTATE_TX_STS BIT(3) > +#define TCA_PSTATE_RX_PLL_STS BIT(2) > +#define TCA_PSTATE_PIPE0_POWER_DOWN GENMASK(1, 0) > + > +#define TCA_GEN_STATUS 0x34 > +#define TCA_GEN_DEV_POR BIT(12) > +#define TCA_GEN_REF_CLK_SEL BIT(8) > +#define TCA_GEN_TYPEC_FLIP_INVERT BIT(4) > +#define TCA_GEN_PHY_TYPEC_DISABLE BIT(3) > +#define TCA_GEN_PHY_TYPEC_FLIP BIT(2) > + > +#define TCA_VBUS_CTRL 0x40 > +#define TCA_VBUS_STATUS 0x44 > + > +#define TCA_INFO 0xFC > + > +struct tca_blk { > + struct typec_switch_dev *sw; > + void __iomem *base; > + struct mutex mutex; > + enum typec_orientation orientation; > +}; > + > struct imx8mq_usb_phy { > struct phy *phy; > struct clk *clk; > void __iomem *base; > struct regulator *vbus; > + struct tca_blk *tca; > u32 pcs_tx_swing_full; > u32 pcs_tx_deemph_3p5db; > u32 tx_vref_tune; > @@ -64,6 +120,171 @@ struct imx8mq_usb_phy { > u32 comp_dis_tune; > }; > > + > +static void tca_blk_orientation_set(struct tca_blk *tca, > + enum typec_orientation orientation); > + > +#ifdef CONFIG_TYPEC > + > +static int tca_blk_typec_switch_set(struct typec_switch_dev *sw, > + enum typec_orientation orientation) > +{ > + struct imx8mq_usb_phy *imx_phy = typec_switch_get_drvdata(sw); > + struct tca_blk *tca = imx_phy->tca; > + int ret; > + > + if (tca->orientation == orientation) > + return 0; > + > + ret = clk_prepare_enable(imx_phy->clk); > + if (ret) > + return ret; > + > + tca_blk_orientation_set(tca, orientation); > + clk_disable_unprepare(imx_phy->clk); > + > + return 0; > +} > + > +static struct typec_switch_dev *tca_blk_get_typec_switch(struct platform_device *pdev, > + struct imx8mq_usb_phy *imx_phy) > +{ > + struct device *dev = &pdev->dev; > + struct typec_switch_dev *sw; > + struct typec_switch_desc sw_desc = { }; > + > + sw_desc.drvdata = imx_phy; > + sw_desc.fwnode = dev->fwnode; > + sw_desc.set = tca_blk_typec_switch_set; > + sw_desc.name = NULL; > + > + sw = typec_switch_register(dev, &sw_desc); > + if (IS_ERR(sw)) { > + dev_err(dev, "Error register tca orientation switch: %ld", > + PTR_ERR(sw)); > + return NULL; > + } > + > + return sw; > +} > + > +static void tca_blk_put_typec_switch(struct typec_switch_dev *sw) > +{ > + typec_switch_unregister(sw); > +} > + > +#else > + > +static struct typec_switch_dev *tca_blk_get_typec_switch(struct platform_device *pdev, > + struct imx8mq_usb_phy *imx_phy) > +{ > + return NULL; > +} > + > +static void tca_blk_put_typec_switch(struct typec_switch_dev *sw) {} > + > +#endif /* CONFIG_TYPEC */ > + > +static void tca_blk_orientation_set(struct tca_blk *tca, > + enum typec_orientation orientation) > +{ > + u32 val; > + > + mutex_lock(&tca->mutex); > + > + if (orientation == TYPEC_ORIENTATION_NONE) { > + /* > + * use Controller Synced Mode for TCA low power enable and > + * put PHY to USB safe state. > + */ > + val = readl(tca->base + TCA_GCFG); > + val = FIELD_PREP(TCA_GCFG_OP_MODE, TCA_GCFG_OP_MODE_SYNCMODE); > + writel(val, tca->base + TCA_GCFG); If the register is intended to be completely overwritten, the readl is unnecessary. Otherwise, ensure a proper read-modify-write sequence. > + > + val = readl(tca->base + TCA_TCPC); > + val = TCA_TCPC_VALID | TCA_TCPC_LOW_POWER_EN; > + writel(val, tca->base + TCA_TCPC); > + > + goto out; > + } > + > + /* use System Configuration Mode for TCA mux control. */ > + val = readl(tca->base + TCA_GCFG); > + val = FIELD_PREP(TCA_GCFG_OP_MODE, TCA_GCFG_OP_MODE_SYSMODE); > + writel(val, tca->base + TCA_GCFG); > + > + /* Disable TCA module */ > + val = readl(tca->base + TCA_SYSMODE_CFG); > + val |= TCA_SYSMODE_TCPC_DISABLE; > + writel(val, tca->base + TCA_SYSMODE_CFG); > + > + if (orientation == TYPEC_ORIENTATION_REVERSE) > + val |= TCA_SYSMODE_TCPC_FLIP; > + else if (orientation == TYPEC_ORIENTATION_NORMAL) > + val &= ~TCA_SYSMODE_TCPC_FLIP; > + > + writel(val, tca->base + TCA_SYSMODE_CFG); > + > + /* Enable TCA module */ > + val &= ~TCA_SYSMODE_TCPC_DISABLE; > + writel(val, tca->base + TCA_SYSMODE_CFG); > + > +out: > + tca->orientation = orientation; > + mutex_unlock(&tca->mutex); > +} > + > +static void tca_blk_init(struct tca_blk *tca) > +{ > + u32 val; > + > + /* reset XBar block */ > + val = readl(tca->base + TCA_CLK_RST); > + val &= ~TCA_CLK_RST_SW; > + writel(val, tca->base + TCA_CLK_RST); > + > + udelay(100); > + > + /* clear reset */ > + val |= TCA_CLK_RST_SW; > + writel(val, tca->base + TCA_CLK_RST); > + > + tca_blk_orientation_set(tca, tca->orientation); > +} > + > +static int imx95_usb_phy_get_tca(struct platform_device *pdev, > + struct imx8mq_usb_phy *imx_phy) > +{ > + struct device *dev = &pdev->dev; > + struct tca_blk *tca; > + > + tca = devm_kzalloc(dev, sizeof(*tca), GFP_KERNEL); > + if (!tca) > + return -ENOMEM; > + > + tca->base = devm_platform_ioremap_resource(pdev, 1); > + if (IS_ERR(tca->base)) > + return PTR_ERR(tca->base); > + > + mutex_init(&tca->mutex); > + > + tca->orientation = TYPEC_ORIENTATION_NORMAL; > + tca->sw = tca_blk_get_typec_switch(pdev, imx_phy); > + imx_phy->tca = tca; > + > + return 0; > +} > + > +static void imx95_usb_phy_put_tca(struct imx8mq_usb_phy *imx_phy) > +{ > + struct tca_blk *tca = imx_phy->tca; > + > + if (!tca) > + return; > + > + tca_blk_put_typec_switch(tca->sw); > +} > + > static u32 phy_tx_vref_tune_from_property(u32 percent) > { > percent = clamp(percent, 94U, 124U); > @@ -315,6 +536,9 @@ static int imx8mp_usb_phy_init(struct phy *phy) > > imx8m_phy_tune(imx_phy); > > + if (imx_phy->tca) > + tca_blk_init(imx_phy->tca); > + > return 0; > } > > @@ -359,6 +583,8 @@ static const struct of_device_id imx8mq_usb_phy_of_match[] = { > .data = &imx8mq_usb_phy_ops,}, > {.compatible = "fsl,imx8mp-usb-phy", > .data = &imx8mp_usb_phy_ops,}, > + {.compatible = "fsl,imx95-usb-phy", > + .data = &imx8mp_usb_phy_ops,}, > { } > }; > MODULE_DEVICE_TABLE(of, imx8mq_usb_phy_of_match); > @@ -398,6 +624,10 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev) > > phy_set_drvdata(imx_phy->phy, imx_phy); > > + if (device_is_compatible(dev, "fsl,imx95-usb-phy") && > + imx95_usb_phy_get_tca(pdev, imx_phy) < 0) > + return dev_err_probe(dev, -ENODEV, "failed to get tca\n"); > + > imx8m_get_phy_tuning_data(imx_phy); > > phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); > @@ -405,8 +635,16 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev) > return PTR_ERR_OR_ZERO(phy_provider); > } > > +static void imx8mq_usb_phy_remove(struct platform_device *pdev) > +{ > + struct imx8mq_usb_phy *imx_phy = platform_get_drvdata(pdev); > + > + imx95_usb_phy_put_tca(imx_phy); > +} > + > static struct platform_driver imx8mq_usb_phy_driver = { > .probe = imx8mq_usb_phy_probe, > + .remove = imx8mq_usb_phy_remove, > .driver = { > .name = "imx8mq-usb-phy", > .of_match_table = imx8mq_usb_phy_of_match, > -- > 2.34.1 > > -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy