drivers/phy/socionext/phy-uniphier-usb3hs.c

Source file repositories/reference/linux-study-clean/drivers/phy/socionext/phy-uniphier-usb3hs.c

File Facts

System
Linux kernel
Corpus path
drivers/phy/socionext/phy-uniphier-usb3hs.c
Extension
.c
Size
11639 bytes
Lines
471
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 uniphier_u3hsphy_param {
	struct {
		int reg_no;
		int msb;
		int lsb;
	} field;
	u8 value;
};

struct uniphier_u3hsphy_trim_param {
	unsigned int rterm;
	unsigned int sel_t;
	unsigned int hs_i;
};

#define trim_param_is_valid(p)	((p)->rterm || (p)->sel_t || (p)->hs_i)

struct uniphier_u3hsphy_priv {
	struct device *dev;
	void __iomem *base;
	struct clk *clk, *clk_parent, *clk_ext, *clk_parent_gio;
	struct reset_control *rst, *rst_parent, *rst_parent_gio;
	struct regulator *vbus;
	const struct uniphier_u3hsphy_soc_data *data;
};

struct uniphier_u3hsphy_soc_data {
	bool is_legacy;
	int nparams;
	const struct uniphier_u3hsphy_param param[MAX_PHY_PARAMS];
	u32 config0;
	u32 config1;
	void (*trim_func)(struct uniphier_u3hsphy_priv *priv, u32 *pconfig,
			  struct uniphier_u3hsphy_trim_param *pt);
};

static void uniphier_u3hsphy_trim_ld20(struct uniphier_u3hsphy_priv *priv,
				       u32 *pconfig,
				       struct uniphier_u3hsphy_trim_param *pt)
{
	*pconfig &= ~HSPHY_CFG0_RTERM_MASK;
	*pconfig |= FIELD_PREP(HSPHY_CFG0_RTERM_MASK, pt->rterm);

	*pconfig &= ~HSPHY_CFG0_SEL_T_MASK;
	*pconfig |= FIELD_PREP(HSPHY_CFG0_SEL_T_MASK, pt->sel_t);

	*pconfig &= ~HSPHY_CFG0_HS_I_MASK;
	*pconfig |= FIELD_PREP(HSPHY_CFG0_HS_I_MASK,  pt->hs_i);
}

static int uniphier_u3hsphy_get_nvparam(struct uniphier_u3hsphy_priv *priv,
					const char *name, unsigned int *val)
{
	struct nvmem_cell *cell;
	u8 *buf;

	cell = devm_nvmem_cell_get(priv->dev, name);
	if (IS_ERR(cell))
		return PTR_ERR(cell);

	buf = nvmem_cell_read(cell, NULL);
	if (IS_ERR(buf))
		return PTR_ERR(buf);

	*val = *buf;

	kfree(buf);

	return 0;
}

static int uniphier_u3hsphy_get_nvparams(struct uniphier_u3hsphy_priv *priv,
					 struct uniphier_u3hsphy_trim_param *pt)
{
	int ret;

	ret = uniphier_u3hsphy_get_nvparam(priv, "rterm", &pt->rterm);
	if (ret)
		return ret;

	ret = uniphier_u3hsphy_get_nvparam(priv, "sel_t", &pt->sel_t);
	if (ret)
		return ret;

	ret = uniphier_u3hsphy_get_nvparam(priv, "hs_i", &pt->hs_i);
	if (ret)
		return ret;

	return 0;
}

Annotation

Implementation Notes