drivers/phy/hisilicon/phy-hi3660-usb3.c

Source file repositories/reference/linux-study-clean/drivers/phy/hisilicon/phy-hi3660-usb3.c

File Facts

System
Linux kernel
Corpus path
drivers/phy/hisilicon/phy-hi3660-usb3.c
Extension
.c
Size
5816 bytes
Lines
235
Domain
Driver Families
Bucket
drivers/phy
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct hi3660_priv {
	struct device *dev;
	struct regmap *peri_crg;
	struct regmap *pctrl;
	struct regmap *otg_bc;
	u32 eye_diagram_param;
};

static int hi3660_phy_init(struct phy *phy)
{
	struct hi3660_priv *priv = phy_get_drvdata(phy);
	u32 val, mask;
	int ret;

	/* usb refclk iso disable */
	ret = regmap_write(priv->peri_crg, PERI_CRG_ISODIS, USB_REFCLK_ISO_EN);
	if (ret)
		goto out;

	/* enable usb_tcxo_en */
	val = USB_TCXO_EN | (USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START);
	ret = regmap_write(priv->pctrl, PCTRL_PERI_CTRL3, val);
	if (ret)
		goto out;

	/* assert phy */
	val = IP_RST_USB3OTGPHY_POR | IP_RST_USB3OTG;
	ret = regmap_write(priv->peri_crg, PERI_CRG_RSTEN4, val);
	if (ret)
		goto out;

	/* enable phy ref clk */
	val = SC_USB3PHY_ABB_GT_EN;
	mask = val;
	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL0, mask, val);
	if (ret)
		goto out;

	val = REF_SSP_EN;
	mask = val;
	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL7, mask, val);
	if (ret)
		goto out;

	/* exit from IDDQ mode */
	mask = USBOTG3CTRL2_POWERDOWN_HSP | USBOTG3CTRL2_POWERDOWN_SSP;
	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL2, mask, 0);
	if (ret)
		goto out;

	/* delay for exit from IDDQ mode */
	usleep_range(100, 120);

	/* deassert phy */
	val = IP_RST_USB3OTGPHY_POR | IP_RST_USB3OTG;
	ret = regmap_write(priv->peri_crg, PERI_CRG_RSTDIS4, val);
	if (ret)
		goto out;

	/* delay for phy deasserted */
	usleep_range(10000, 15000);

	/* fake vbus valid signal */
	val = USBOTG3_CTRL3_VBUSVLDEXT | USBOTG3_CTRL3_VBUSVLDEXTSEL;
	mask = val;
	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL3, mask, val);
	if (ret)
		goto out;

	/* delay for vbus valid */
	usleep_range(100, 120);

	ret = regmap_write(priv->otg_bc, USBOTG3_CTRL4,
			priv->eye_diagram_param);
	if (ret)
		goto out;

	return 0;
out:
	dev_err(priv->dev, "failed to init phy ret: %d\n", ret);
	return ret;
}

static int hi3660_phy_exit(struct phy *phy)
{
	struct hi3660_priv *priv = phy_get_drvdata(phy);
	u32 val;
	int ret;

	/* assert phy */

Annotation

Implementation Notes