drivers/net/phy/dp83640.c

Source file repositories/reference/linux-study-clean/drivers/net/phy/dp83640.c

File Facts

System
Linux kernel
Corpus path
drivers/net/phy/dp83640.c
Extension
.c
Size
38583 bytes
Lines
1544
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 dp83640_skb_info {
	int ptp_type;
	unsigned long tmo;
};

struct phy_rxts {
	u16 ns_lo;   /* ns[15:0] */
	u16 ns_hi;   /* overflow[1:0], ns[29:16] */
	u16 sec_lo;  /* sec[15:0] */
	u16 sec_hi;  /* sec[31:16] */
	u16 seqid;   /* sequenceId[15:0] */
	u16 msgtype; /* messageType[3:0], hash[11:0] */
};

struct phy_txts {
	u16 ns_lo;   /* ns[15:0] */
	u16 ns_hi;   /* overflow[1:0], ns[29:16] */
	u16 sec_lo;  /* sec[15:0] */
	u16 sec_hi;  /* sec[31:16] */
};

struct rxts {
	struct list_head list;
	unsigned long tmo;
	u64 ns;
	u16 seqid;
	u8  msgtype;
	u16 hash;
};

struct dp83640_clock;

struct dp83640_private {
	struct list_head list;
	struct dp83640_clock *clock;
	struct phy_device *phydev;
	struct mii_timestamper mii_ts;
	struct delayed_work ts_work;
	int hwts_tx_en;
	int hwts_rx_en;
	int layer;
	int version;
	/* remember state of cfg0 during calibration */
	int cfg0;
	/* remember the last event time stamp */
	struct phy_txts edata;
	/* list of rx timestamps */
	struct list_head rxts;
	struct list_head rxpool;
	struct rxts rx_pool_data[MAX_RXTS];
	/* protects above three fields from concurrent access */
	spinlock_t rx_lock;
	/* queues of incoming and outgoing packets */
	struct sk_buff_head rx_queue;
	struct sk_buff_head tx_queue;
};

struct dp83640_clock {
	/* keeps the instance in the 'phyter_clocks' list */
	struct list_head list;
	/* we create one clock instance per MII bus */
	struct mii_bus *bus;
	/* protects extended registers from concurrent access */
	struct mutex extreg_lock;
	/* remembers which page was last selected */
	int page;
	/* our advertised capabilities */
	struct ptp_clock_info caps;
	/* protects the three fields below from concurrent access */
	struct mutex clock_lock;
	/* the one phyter from which we shall read */
	struct dp83640_private *chosen;
	/* list of the other attached phyters, not chosen */
	struct list_head phylist;
	/* reference to our PTP hardware clock */
	struct ptp_clock *ptp_clock;
};

/* globals */

enum {
	CALIBRATE_GPIO,
	PEROUT_GPIO,
	EXTTS0_GPIO,
	EXTTS1_GPIO,
	EXTTS2_GPIO,
	EXTTS3_GPIO,
	EXTTS4_GPIO,
	EXTTS5_GPIO,
	GPIO_TABLE_SIZE

Annotation

Implementation Notes