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phy: fsl-imx8mq-usb: add tca function driver for imx95

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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>
This commit is contained in:
Xu Yang
2024-12-04 13:09:05 +08:00
committed by Vinod Koul
parent d231776772
commit b58f0f86fd
2 changed files with 241 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/phy/freescale/Kconfig
View File

@@ -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

240
drivers/phy/freescale/phy-fsl-imx8mq-usb.c
View File

@@ -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,