drivers/misc/altera-stapl/altera-jtag.h

Source file repositories/reference/linux-study-clean/drivers/misc/altera-stapl/altera-jtag.h

File Facts

System
Linux kernel
Corpus path
drivers/misc/altera-stapl/altera-jtag.h
Extension
.h
Size
2727 bytes
Lines
100
Domain
Driver Families
Bucket
drivers/misc
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 altera_jtag {
	/* Global variable to store the current JTAG state */
	enum altera_jtag_state jtag_state;

	/* Store current stop-state for DR and IR scan commands */
	enum altera_jtag_state drstop_state;
	enum altera_jtag_state irstop_state;

	/* Store current padding values */
	u32 dr_pre;
	u32 dr_post;
	u32 ir_pre;
	u32 ir_post;
	u32 dr_length;
	u32 ir_length;
	u8 *dr_pre_data;
	u8 *dr_post_data;
	u8 *ir_pre_data;
	u8 *ir_post_data;
	u8 *dr_buffer;
	u8 *ir_buffer;
};

#define ALTERA_STACK_SIZE 128
#define ALTERA_MESSAGE_LENGTH 1024

struct altera_state {
	struct altera_config	*config;
	struct altera_jtag	js;
	char			msg_buff[ALTERA_MESSAGE_LENGTH + 1];
	long			stack[ALTERA_STACK_SIZE];
};

int altera_jinit(struct altera_state *astate);
int altera_set_drstop(struct altera_jtag *js, enum altera_jtag_state state);
int altera_set_irstop(struct altera_jtag *js, enum altera_jtag_state state);
int altera_set_dr_pre(struct altera_jtag *js, u32 count, u32 start_index,
				u8 *preamble_data);
int altera_set_ir_pre(struct altera_jtag *js, u32 count, u32 start_index,
				u8 *preamble_data);
int altera_set_dr_post(struct altera_jtag *js, u32 count, u32 start_index,
				u8 *postamble_data);
int altera_set_ir_post(struct altera_jtag *js, u32 count, u32 start_index,
				u8 *postamble_data);
int altera_goto_jstate(struct altera_state *astate,
				enum altera_jtag_state state);
int altera_wait_cycles(struct altera_state *astate, s32 cycles,
				enum altera_jtag_state wait_state);
int altera_wait_msecs(struct altera_state *astate, s32 microseconds,
				enum altera_jtag_state wait_state);
int altera_irscan(struct altera_state *astate, u32 count,
				u8 *tdi_data, u32 start_index);
int altera_swap_ir(struct altera_state *astate,
				u32 count, u8 *in_data,
				u32 in_index, u8 *out_data,
				u32 out_index);
int altera_drscan(struct altera_state *astate, u32 count,
				u8 *tdi_data, u32 start_index);
int altera_swap_dr(struct altera_state *astate, u32 count,
				u8 *in_data, u32 in_index,
				u8 *out_data, u32 out_index);
void altera_free_buffers(struct altera_state *astate);
#endif /* ALTERA_JTAG_H */

Annotation

Implementation Notes