drivers/media/usb/pvrusb2/pvrusb2-util.h

Source file repositories/reference/linux-study-clean/drivers/media/usb/pvrusb2/pvrusb2-util.h

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/pvrusb2/pvrusb2-util.h
Extension
.h
Size
876 bytes
Lines
39
Domain
Driver Families
Bucket
drivers/media
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

#ifndef __PVRUSB2_UTIL_H
#define __PVRUSB2_UTIL_H

#define PVR2_DECOMPOSE_LE(t,i,d) \
    do {    \
	(t)[i] = (d) & 0xff;\
	(t)[i+1] = ((d) >> 8) & 0xff;\
	(t)[i+2] = ((d) >> 16) & 0xff;\
	(t)[i+3] = ((d) >> 24) & 0xff;\
    } while(0)

#define PVR2_DECOMPOSE_BE(t,i,d) \
    do {    \
	(t)[i+3] = (d) & 0xff;\
	(t)[i+2] = ((d) >> 8) & 0xff;\
	(t)[i+1] = ((d) >> 16) & 0xff;\
	(t)[i] = ((d) >> 24) & 0xff;\
    } while(0)

#define PVR2_COMPOSE_LE(t,i) \
    ((((u32)((t)[i+3])) << 24) | \
     (((u32)((t)[i+2])) << 16) | \
     (((u32)((t)[i+1])) << 8) | \
     ((u32)((t)[i])))

#define PVR2_COMPOSE_BE(t,i) \
    ((((u32)((t)[i])) << 24) | \
     (((u32)((t)[i+1])) << 16) | \
     (((u32)((t)[i+2])) << 8) | \
     ((u32)((t)[i+3])))


#endif /* __PVRUSB2_UTIL_H */

Annotation

Implementation Notes