include/linux/amba/kmi.h
Source file repositories/reference/linux-study-clean/include/linux/amba/kmi.h
File Facts
- System
- Linux kernel
- Corpus path
include/linux/amba/kmi.h- Extension
.h- Size
- 2272 bytes
- Lines
- 79
- Domain
- Core OS
- Bucket
- Core Kernel Interface
- Inferred role
- Core OS: implementation source
- Status
- source implementation candidate
Why This File Exists
Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
#ifndef ASM_ARM_HARDWARE_AMBA_KMI_H
#define ASM_ARM_HARDWARE_AMBA_KMI_H
/*
* KMI control register:
* KMICR_TYPE 0 = PS2/AT mode, 1 = No line control bit mode
* KMICR_RXINTREN 1 = enable RX interrupts
* KMICR_TXINTREN 1 = enable TX interrupts
* KMICR_EN 1 = enable KMI
* KMICR_FD 1 = force KMI data low
* KMICR_FC 1 = force KMI clock low
*/
#define KMICR (KMI_BASE + 0x00)
#define KMICR_TYPE (1 << 5)
#define KMICR_RXINTREN (1 << 4)
#define KMICR_TXINTREN (1 << 3)
#define KMICR_EN (1 << 2)
#define KMICR_FD (1 << 1)
#define KMICR_FC (1 << 0)
/*
* KMI status register:
* KMISTAT_TXEMPTY 1 = transmitter register empty
* KMISTAT_TXBUSY 1 = currently sending data
* KMISTAT_RXFULL 1 = receiver register ready to be read
* KMISTAT_RXBUSY 1 = currently receiving data
* KMISTAT_RXPARITY parity of last databyte received
* KMISTAT_IC current level of KMI clock input
* KMISTAT_ID current level of KMI data input
*/
#define KMISTAT (KMI_BASE + 0x04)
#define KMISTAT_TXEMPTY (1 << 6)
#define KMISTAT_TXBUSY (1 << 5)
#define KMISTAT_RXFULL (1 << 4)
#define KMISTAT_RXBUSY (1 << 3)
#define KMISTAT_RXPARITY (1 << 2)
#define KMISTAT_IC (1 << 1)
#define KMISTAT_ID (1 << 0)
/*
* KMI data register
*/
#define KMIDATA (KMI_BASE + 0x08)
/*
* KMI clock divisor: to generate 8MHz internal clock
* div = (ref / 8MHz) - 1; 0 <= div <= 15
*/
#define KMICLKDIV (KMI_BASE + 0x0c)
/*
* KMI interrupt register:
* KMIIR_TXINTR 1 = transmit interrupt asserted
* KMIIR_RXINTR 1 = receive interrupt asserted
*/
#define KMIIR (KMI_BASE + 0x10)
#define KMIIR_TXINTR (1 << 1)
#define KMIIR_RXINTR (1 << 0)
/*
* The size of the KMI primecell
*/
#define KMI_SIZE (0x100)
#endif
Annotation
- Atlas domain: Core OS / Core Kernel Interface.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.