drivers/net/ethernet/hisilicon/hns_mdio.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/hisilicon/hns_mdio.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/hisilicon/hns_mdio.c
Extension
.c
Size
15942 bytes
Lines
653
Domain
Driver Families
Bucket
drivers/net
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 hns_mdio_sc_reg {
	u16 mdio_clk_en;
	u16 mdio_clk_dis;
	u16 mdio_reset_req;
	u16 mdio_reset_dreq;
	u16 mdio_clk_st;
	u16 mdio_reset_st;
};

struct hns_mdio_device {
	u8 __iomem *vbase;		/* mdio reg base address */
	struct regmap *subctrl_vbase;
	struct hns_mdio_sc_reg sc_reg;
};

/* mdio reg */
#define MDIO_COMMAND_REG		0x0
#define MDIO_ADDR_REG			0x4
#define MDIO_WDATA_REG			0x8
#define MDIO_RDATA_REG			0xc
#define MDIO_STA_REG			0x10

/* cfg phy bit map */
#define MDIO_CMD_DEVAD_M	0x1f
#define MDIO_CMD_DEVAD_S	0
#define MDIO_CMD_PRTAD_M	0x1f
#define MDIO_CMD_PRTAD_S	5
#define MDIO_CMD_OP_S		10
#define MDIO_CMD_ST_S		12
#define MDIO_CMD_START_B	14

#define MDIO_ADDR_DATA_M	0xffff
#define MDIO_ADDR_DATA_S	0

#define MDIO_WDATA_DATA_M	0xffff
#define MDIO_WDATA_DATA_S	0

#define MDIO_RDATA_DATA_M	0xffff
#define MDIO_RDATA_DATA_S	0

#define MDIO_STATE_STA_B	0

enum mdio_st_clause {
	MDIO_ST_CLAUSE_45 = 0,
	MDIO_ST_CLAUSE_22
};

enum mdio_c22_op_seq {
	MDIO_C22_WRITE = 1,
	MDIO_C22_READ = 2
};

enum mdio_c45_op_seq {
	MDIO_C45_WRITE_ADDR = 0,
	MDIO_C45_WRITE_DATA,
	MDIO_C45_READ_INCREMENT,
	MDIO_C45_READ
};

/* peri subctrl reg */
#define MDIO_SC_CLK_EN		0x338
#define MDIO_SC_CLK_DIS		0x33C
#define MDIO_SC_RESET_REQ	0xA38
#define MDIO_SC_RESET_DREQ	0xA3C
#define MDIO_SC_CLK_ST		0x531C
#define MDIO_SC_RESET_ST	0x5A1C

static void mdio_write_reg(u8 __iomem *base, u32 reg, u32 value)
{
	writel_relaxed(value, base + reg);
}

#define MDIO_WRITE_REG(a, reg, value) \
	mdio_write_reg((a)->vbase, (reg), (value))

static u32 mdio_read_reg(u8 __iomem *base, u32 reg)
{
	return readl_relaxed(base + reg);
}

#define mdio_set_field(origin, mask, shift, val) \
	do { \
		(origin) &= (~((mask) << (shift))); \
		(origin) |= (((val) & (mask)) << (shift)); \
	} while (0)

#define mdio_get_field(origin, mask, shift) (((origin) >> (shift)) & (mask))

static void mdio_set_reg_field(u8 __iomem *base, u32 reg, u32 mask, u32 shift,
			       u32 val)

Annotation

Implementation Notes