drivers/gpib/include/amccs5933.h

Source file repositories/reference/linux-study-clean/drivers/gpib/include/amccs5933.h

File Facts

System
Linux kernel
Corpus path
drivers/gpib/include/amccs5933.h
Extension
.h
Size
1529 bytes
Lines
60
Domain
Driver Families
Bucket
drivers/gpib
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

// register offsets
enum {
	MBEF_REG = 0x34,	// mailbux empty/full
	INTCSR_REG = 0x38,	// interrupt control and status
	BMCSR_REG = 0x3c,	// bus master control and status
};

// incoming mailbox 0-3  register offsets
extern inline int INCOMING_MAILBOX_REG(unsigned int mailbox)
{
	return (0x10 + 4 * mailbox);
};

// bit definitions

// INTCSR bits
enum {
	OUTBOX_EMPTY_INTR_BIT = 0x10,	// enable outbox empty interrupt
	INBOX_FULL_INTR_BIT = 0x1000,	// enable inbox full interrupt
	INBOX_INTR_CS_BIT = 0x20000,	// read, or write clear inbox full interrupt
	INTR_ASSERTED_BIT = 0x800000,	// read only, interrupt asserted
};

// select byte 0 to 3 of incoming mailbox
extern inline int INBOX_BYTE_BITS(unsigned int byte)
{
	return (byte & 0x3) << 8;
};

// select incoming mailbox 0 to 3
extern inline int INBOX_SELECT_BITS(unsigned int mailbox)
{
	return (mailbox & 0x3) << 10;
};

// select byte 0 to 3 of outgoing mailbox
extern inline int OUTBOX_BYTE_BITS(unsigned int byte)
{
	return (byte & 0x3);
};

// select outgoing mailbox 0 to 3
extern inline int OUTBOX_SELECT_BITS(unsigned int mailbox)
{
	return (mailbox & 0x3) << 2;
};

// BMCSR bits
enum {
	MBOX_FLAGS_RESET_BIT = 0x08000000,	// resets mailbox empty/full flags
};

Annotation

Implementation Notes