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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
phy: fsl-imx8mq-usb: add tca function driver for imx95
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@nxp.com>
Reviewed-by: Jun Li <jun.li@nxp.com>
Link: https://lore.kernel.org/r/20241204050907.1081781-1-xu.yang_2@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
authored by
Xu Yang
and committed by
Vinod Koul
b58f0f86
d2317767
+241
+1
drivers/phy/freescale/Kconfig
+1
drivers/phy/freescale/Kconfig
+240
drivers/phy/freescale/phy-fsl-imx8mq-usb.c
+240
drivers/phy/freescale/phy-fsl-imx8mq-usb.c
···
10
10
#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/consumer.h>
13
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#include <linux/usb/typec_mux.h>
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#define PHY_CTRL0 0x0
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#define PHY_CTRL0_REF_SSP_EN BIT(2)
···
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#define PHY_TUNE_DEFAULT 0xffffffff
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#define TCA_CLK_RST 0x00
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#define TCA_CLK_RST_SW BIT(9)
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#define TCA_CLK_RST_REF_CLK_EN BIT(1)
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#define TCA_CLK_RST_SUSPEND_CLK_EN BIT(0)
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#define TCA_INTR_EN 0x04
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#define TCA_INTR_STS 0x08
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#define TCA_GCFG 0x10
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#define TCA_GCFG_ROLE_HSTDEV BIT(4)
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#define TCA_GCFG_OP_MODE GENMASK(1, 0)
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#define TCA_GCFG_OP_MODE_SYSMODE 0
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#define TCA_GCFG_OP_MODE_SYNCMODE 1
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#define TCA_TCPC 0x14
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#define TCA_TCPC_VALID BIT(4)
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#define TCA_TCPC_LOW_POWER_EN BIT(3)
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#define TCA_TCPC_ORIENTATION_NORMAL BIT(2)
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#define TCA_TCPC_MUX_CONTRL GENMASK(1, 0)
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#define TCA_TCPC_MUX_CONTRL_NO_CONN 0
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#define TCA_TCPC_MUX_CONTRL_USB_CONN 1
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#define TCA_SYSMODE_CFG 0x18
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#define TCA_SYSMODE_TCPC_DISABLE BIT(3)
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#define TCA_SYSMODE_TCPC_FLIP BIT(2)
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#define TCA_CTRLSYNCMODE_CFG0 0x20
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#define TCA_CTRLSYNCMODE_CFG1 0x20
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#define TCA_PSTATE 0x30
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#define TCA_PSTATE_CM_STS BIT(4)
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#define TCA_PSTATE_TX_STS BIT(3)
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#define TCA_PSTATE_RX_PLL_STS BIT(2)
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#define TCA_PSTATE_PIPE0_POWER_DOWN GENMASK(1, 0)
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#define TCA_GEN_STATUS 0x34
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#define TCA_GEN_DEV_POR BIT(12)
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#define TCA_GEN_REF_CLK_SEL BIT(8)
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#define TCA_GEN_TYPEC_FLIP_INVERT BIT(4)
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#define TCA_GEN_PHY_TYPEC_DISABLE BIT(3)
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#define TCA_GEN_PHY_TYPEC_FLIP BIT(2)
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#define TCA_VBUS_CTRL 0x40
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#define TCA_VBUS_STATUS 0x44
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#define TCA_INFO 0xfc
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struct tca_blk {
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struct typec_switch_dev *sw;
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void __iomem *base;
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struct mutex mutex;
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enum typec_orientation orientation;
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};
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struct imx8mq_usb_phy {
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struct phy *phy;
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struct clk *clk;
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void __iomem *base;
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struct regulator *vbus;
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struct tca_blk *tca;
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u32 pcs_tx_swing_full;
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u32 pcs_tx_deemph_3p5db;
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u32 tx_vref_tune;
···
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u32 tx_vboost_level;
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u32 comp_dis_tune;
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};
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static void tca_blk_orientation_set(struct tca_blk *tca,
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enum typec_orientation orientation);
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#ifdef CONFIG_TYPEC
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static int tca_blk_typec_switch_set(struct typec_switch_dev *sw,
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enum typec_orientation orientation)
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{
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struct imx8mq_usb_phy *imx_phy = typec_switch_get_drvdata(sw);
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struct tca_blk *tca = imx_phy->tca;
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int ret;
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if (tca->orientation == orientation)
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return 0;
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ret = clk_prepare_enable(imx_phy->clk);
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if (ret)
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return ret;
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tca_blk_orientation_set(tca, orientation);
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clk_disable_unprepare(imx_phy->clk);
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return 0;
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}
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static struct typec_switch_dev *tca_blk_get_typec_switch(struct platform_device *pdev,
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struct imx8mq_usb_phy *imx_phy)
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{
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struct device *dev = &pdev->dev;
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struct typec_switch_dev *sw;
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struct typec_switch_desc sw_desc = { };
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sw_desc.drvdata = imx_phy;
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sw_desc.fwnode = dev->fwnode;
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sw_desc.set = tca_blk_typec_switch_set;
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sw_desc.name = NULL;
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sw = typec_switch_register(dev, &sw_desc);
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if (IS_ERR(sw)) {
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dev_err(dev, "Error register tca orientation switch: %ld",
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PTR_ERR(sw));
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return NULL;
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}
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return sw;
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}
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static void tca_blk_put_typec_switch(struct typec_switch_dev *sw)
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{
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typec_switch_unregister(sw);
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}
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#else
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static struct typec_switch_dev *tca_blk_get_typec_switch(struct platform_device *pdev,
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struct imx8mq_usb_phy *imx_phy)
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{
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return NULL;
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}
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static void tca_blk_put_typec_switch(struct typec_switch_dev *sw) {}
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#endif /* CONFIG_TYPEC */
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static void tca_blk_orientation_set(struct tca_blk *tca,
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enum typec_orientation orientation)
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{
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u32 val;
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mutex_lock(&tca->mutex);
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if (orientation == TYPEC_ORIENTATION_NONE) {
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/*
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* use Controller Synced Mode for TCA low power enable and
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* put PHY to USB safe state.
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*/
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val = FIELD_PREP(TCA_GCFG_OP_MODE, TCA_GCFG_OP_MODE_SYNCMODE);
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writel(val, tca->base + TCA_GCFG);
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val = TCA_TCPC_VALID | TCA_TCPC_LOW_POWER_EN;
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writel(val, tca->base + TCA_TCPC);
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goto out;
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}
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/* use System Configuration Mode for TCA mux control. */
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val = FIELD_PREP(TCA_GCFG_OP_MODE, TCA_GCFG_OP_MODE_SYSMODE);
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writel(val, tca->base + TCA_GCFG);
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/* Disable TCA module */
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val = readl(tca->base + TCA_SYSMODE_CFG);
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val |= TCA_SYSMODE_TCPC_DISABLE;
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writel(val, tca->base + TCA_SYSMODE_CFG);
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if (orientation == TYPEC_ORIENTATION_REVERSE)
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val |= TCA_SYSMODE_TCPC_FLIP;
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else if (orientation == TYPEC_ORIENTATION_NORMAL)
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val &= ~TCA_SYSMODE_TCPC_FLIP;
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writel(val, tca->base + TCA_SYSMODE_CFG);
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/* Enable TCA module */
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val &= ~TCA_SYSMODE_TCPC_DISABLE;
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writel(val, tca->base + TCA_SYSMODE_CFG);
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out:
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tca->orientation = orientation;
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mutex_unlock(&tca->mutex);
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}
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static void tca_blk_init(struct tca_blk *tca)
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{
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u32 val;
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/* reset XBar block */
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val = readl(tca->base + TCA_CLK_RST);
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val &= ~TCA_CLK_RST_SW;
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writel(val, tca->base + TCA_CLK_RST);
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udelay(100);
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/* clear reset */
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val |= TCA_CLK_RST_SW;
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writel(val, tca->base + TCA_CLK_RST);
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tca_blk_orientation_set(tca, tca->orientation);
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}
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static struct tca_blk *imx95_usb_phy_get_tca(struct platform_device *pdev,
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struct imx8mq_usb_phy *imx_phy)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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struct tca_blk *tca;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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if (!res)
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return NULL;
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tca = devm_kzalloc(dev, sizeof(*tca), GFP_KERNEL);
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if (!tca)
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return ERR_PTR(-ENOMEM);
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tca->base = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(tca->base))
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return ERR_CAST(tca->base);
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mutex_init(&tca->mutex);
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tca->orientation = TYPEC_ORIENTATION_NORMAL;
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tca->sw = tca_blk_get_typec_switch(pdev, imx_phy);
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return tca;
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}
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static void imx95_usb_phy_put_tca(struct imx8mq_usb_phy *imx_phy)
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{
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struct tca_blk *tca = imx_phy->tca;
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if (!tca)
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return;
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tca_blk_put_typec_switch(tca->sw);
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}
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static u32 phy_tx_vref_tune_from_property(u32 percent)
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{
···
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imx8m_phy_tune(imx_phy);
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if (imx_phy->tca)
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tca_blk_init(imx_phy->tca);
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+
540
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return 0;
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}
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···
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.data = &imx8mq_usb_phy_ops,},
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{.compatible = "fsl,imx8mp-usb-phy",
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.data = &imx8mp_usb_phy_ops,},
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{.compatible = "fsl,imx95-usb-phy",
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.data = &imx8mp_usb_phy_ops,},
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{ }
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};
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MODULE_DEVICE_TABLE(of, imx8mq_usb_phy_of_match);
···
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phy_set_drvdata(imx_phy->phy, imx_phy);
627
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imx_phy->tca = imx95_usb_phy_get_tca(pdev, imx_phy);
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if (IS_ERR(imx_phy->tca))
403
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return dev_err_probe(dev, PTR_ERR(imx_phy->tca),
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"failed to get tca\n");
405
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628
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imx8m_get_phy_tuning_data(imx_phy);
629
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phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
···
637
405
return PTR_ERR_OR_ZERO(phy_provider);
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}
639
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static void imx8mq_usb_phy_remove(struct platform_device *pdev)
409
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{
410
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struct imx8mq_usb_phy *imx_phy = platform_get_drvdata(pdev);
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imx95_usb_phy_put_tca(imx_phy);
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}
414
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static struct platform_driver imx8mq_usb_phy_driver = {
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.probe = imx8mq_usb_phy_probe,
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.remove = imx8mq_usb_phy_remove,
642
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.driver = {
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.name = "imx8mq-usb-phy",
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.of_match_table = imx8mq_usb_phy_of_match,