[PATCH v11 1/3] phy: fsl-imx8mq-usb: add tca function driver for imx95
Frank Li
Frank.li at nxp.com
Thu Feb 13 12:11:03 PST 2025
On Thu, Jan 16, 2025 at 11:46:23AM +0800, Xu Yang wrote:
> Hi Vinod,
Vinod:
Do you have chance to check these patch? The whole i.mx95 usb
depend on this!
Frank
>
> On Mon, Jan 06, 2025 at 10:03:03AM +0800, Xu Yang wrote:
> > Hi,
> >
> > On Wed, Dec 04, 2024 at 01:09:05PM +0800, Xu Yang wrote:
> > > 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 <xu.yang_2 at nxp.com>
> > > Reviewed-by: Jun Li <jun.li at nxp.com>
> > >
> > > ---
> > > Changes in v2:
> > > - return the value of imx95_usb_phy_get_tca()
> > > Changes in v3:
> > > - no changes
> > > Changes in v4:
> > > - remove compatible check for imx95
> > > - check whether tca register region exist or not, yes means has tca,
> > > otherwise skip tca setup
> > > Changes in v5:
> > > - no changes
> > > Changes in v6:
> > > - no changes
> > > Changes in v7:
> > > - fix sparse warnings in imx95_usb_phy_get_tca()
> > > Changes in v8:
> > > - #define TCA_INFO 0xFC -> 0xfc
> > > Changes in v9:
> > > - no changes
> > > Changes in v10:
> > > - no changes
> > > Changes in v11:
> > > - remove some unnecessary readl() as suggested by Amit Singh Tomar
> > > ---
> > > drivers/phy/freescale/Kconfig | 1 +
> > > drivers/phy/freescale/phy-fsl-imx8mq-usb.c | 240 +++++++++++++++++++++
> > > 2 files changed, 241 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..a974ef94de9a 100644
> > > --- a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c
> > > +++ b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c
> > > @@ -10,6 +10,7 @@
> > > #include <linux/phy/phy.h>
> > > #include <linux/platform_device.h>
> > > #include <linux/regulator/consumer.h>
> > > +#include <linux/usb/typec_mux.h>
> > >
> > > #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 +120,172 @@ 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 = FIELD_PREP(TCA_GCFG_OP_MODE, TCA_GCFG_OP_MODE_SYNCMODE);
> > > + writel(val, tca->base + TCA_GCFG);
> > > +
> > > + 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 = 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 struct tca_blk *imx95_usb_phy_get_tca(struct platform_device *pdev,
> > > + struct imx8mq_usb_phy *imx_phy)
> > > +{
> > > + struct device *dev = &pdev->dev;
> > > + struct resource *res;
> > > + struct tca_blk *tca;
> > > +
> > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> > > + if (!res)
> > > + return NULL;
> > > +
> > > + tca = devm_kzalloc(dev, sizeof(*tca), GFP_KERNEL);
> > > + if (!tca)
> > > + return ERR_PTR(-ENOMEM);
> > > +
> > > + tca->base = devm_ioremap_resource(&pdev->dev, res);
> > > + if (IS_ERR(tca->base))
> > > + return ERR_CAST(tca->base);
> > > +
> > > + mutex_init(&tca->mutex);
> > > +
> > > + tca->orientation = TYPEC_ORIENTATION_NORMAL;
> > > + tca->sw = tca_blk_get_typec_switch(pdev, imx_phy);
> > > +
> > > + return tca;
> > > +}
> > > +
> > > +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 +537,9 @@ 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 +584,8 @@ 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 +625,11 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev)
> > >
> > > phy_set_drvdata(imx_phy->phy, imx_phy);
> > >
> > > + imx_phy->tca = imx95_usb_phy_get_tca(pdev, imx_phy);
> > > + if (IS_ERR(imx_phy->tca))
> > > + return dev_err_probe(dev, PTR_ERR(imx_phy->tca),
> > > + "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 +637,16 @@ 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
> > >
> >
> > Happy New Year!
> > And a gentle ping.
>
> A gentle ping!
> If no other concerns, please help pick up them since many users are
> waiting for it. And v6.13 is almost coming.
>
> Thanks,
> Xu Yang
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