drivers/usb/musb/musb_dsps.c

Source file repositories/reference/linux-study-clean/drivers/usb/musb/musb_dsps.c

File Facts

System
Linux kernel
Corpus path
drivers/usb/musb/musb_dsps.c
Extension
.c
Size
26645 bytes
Lines
1049
Domain
Driver Families
Bucket
drivers/usb
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 dsps_musb_wrapper {
	u16	revision;
	u16	control;
	u16	status;
	u16	epintr_set;
	u16	epintr_clear;
	u16	epintr_status;
	u16	coreintr_set;
	u16	coreintr_clear;
	u16	coreintr_status;
	u16	phy_utmi;
	u16	mode;
	u16	tx_mode;
	u16	rx_mode;

	/* bit positions for control */
	unsigned	reset:5;

	/* bit positions for interrupt */
	unsigned	usb_shift:5;
	u32		usb_mask;
	u32		usb_bitmap;
	unsigned	drvvbus:5;

	unsigned	txep_shift:5;
	u32		txep_mask;
	u32		txep_bitmap;

	unsigned	rxep_shift:5;
	u32		rxep_mask;
	u32		rxep_bitmap;

	/* bit positions for phy_utmi */
	unsigned	otg_disable:5;

	/* bit positions for mode */
	unsigned	iddig:5;
	unsigned	iddig_mux:5;
	/* miscellaneous stuff */
	unsigned	poll_timeout;
};

/*
 * register shadow for suspend
 */
struct dsps_context {
	u32 control;
	u32 epintr;
	u32 coreintr;
	u32 phy_utmi;
	u32 mode;
	u32 tx_mode;
	u32 rx_mode;
};

/*
 * DSPS glue structure.
 */
struct dsps_glue {
	struct device *dev;
	struct platform_device *musb;	/* child musb pdev */
	const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
	int vbus_irq;			/* optional vbus irq */
	unsigned long last_timer;    /* last timer data for each instance */
	bool sw_babble_enabled;
	void __iomem *usbss_base;

	struct dsps_context context;
	struct debugfs_regset32 regset;
	struct dentry *dbgfs_root;
};

static const struct debugfs_reg32 dsps_musb_regs[] = {
	{ "revision",		0x00 },
	{ "control",		0x14 },
	{ "status",		0x18 },
	{ "eoi",		0x24 },
	{ "intr0_stat",		0x30 },
	{ "intr1_stat",		0x34 },
	{ "intr0_set",		0x38 },
	{ "intr1_set",		0x3c },
	{ "txmode",		0x70 },
	{ "rxmode",		0x74 },
	{ "autoreq",		0xd0 },
	{ "srpfixtime",		0xd4 },
	{ "tdown",		0xd8 },
	{ "phy_utmi",		0xe0 },
	{ "mode",		0xe8 },
};

Annotation

Implementation Notes