On 10-10-24, 17:08, 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@xxxxxxx>
> Reviewed-by: Jun Li <jun.li@xxxxxxx>
>
> ---
> 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()
> ---
> drivers/phy/freescale/Kconfig | 1 +
> drivers/phy/freescale/phy-fsl-imx8mq-usb.c | 243 +++++++++++++++++++++
> 2 files changed, 244 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..661191276b27 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
lowercase please
> +
> +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 +120,175 @@ 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);
> +}
Why to put a wrapper over an API, call this instead?
> +
> +#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);
> +
> + 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 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 +540,9 @@ 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 +587,8 @@ 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 +628,11 @@ 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 +640,16 @@ 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
--
~Vinod
