drivers/tty/serial/dz.h
Source file repositories/reference/linux-study-clean/drivers/tty/serial/dz.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/tty/serial/dz.h- Extension
.h- Size
- 5478 bytes
- Lines
- 131
- Domain
- Driver Families
- Bucket
- drivers/tty
- 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.
- 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
- 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 DZ_SERIAL_H
#define DZ_SERIAL_H
/*
* Definitions for the Control and Status Register.
*/
#define DZ_TRDY 0x8000 /* Transmitter empty */
#define DZ_TIE 0x4000 /* Transmitter Interrupt Enbl */
#define DZ_TLINE 0x0300 /* Transmitter Line Number */
#define DZ_RDONE 0x0080 /* Receiver data ready */
#define DZ_RIE 0x0040 /* Receive Interrupt Enable */
#define DZ_MSE 0x0020 /* Master Scan Enable */
#define DZ_CLR 0x0010 /* Master reset */
#define DZ_MAINT 0x0008 /* Loop Back Mode */
/*
* Definitions for the Receiver Buffer Register.
*/
#define DZ_RBUF_MASK 0x00FF /* Data Mask */
#define DZ_LINE_MASK 0x0300 /* Line Mask */
#define DZ_DVAL 0x8000 /* Valid Data indicator */
#define DZ_OERR 0x4000 /* Overrun error indicator */
#define DZ_FERR 0x2000 /* Frame error indicator */
#define DZ_PERR 0x1000 /* Parity error indicator */
#define DZ_BREAK 0x0800 /* BREAK event software flag */
#define LINE(x) ((x & DZ_LINE_MASK) >> 8) /* Get the line number
from the input buffer */
#define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK))
/*
* Definitions for the Transmit Control Register.
*/
#define DZ_LINE_KEYBOARD 0x0001
#define DZ_LINE_MOUSE 0x0002
#define DZ_LINE_MODEM 0x0004
#define DZ_LINE_PRINTER 0x0008
#define DZ_MODEM_RTS 0x0800 /* RTS for the modem line (2) */
#define DZ_MODEM_DTR 0x0400 /* DTR for the modem line (2) */
#define DZ_PRINT_RTS 0x0200 /* RTS for the prntr line (3) */
#define DZ_PRINT_DTR 0x0100 /* DTR for the prntr line (3) */
#define DZ_LNENB 0x000f /* Transmitter Line Enable */
/*
* Definitions for the Modem Status Register.
*/
#define DZ_MODEM_RI 0x0800 /* RI for the modem line (2) */
#define DZ_MODEM_CD 0x0400 /* CD for the modem line (2) */
#define DZ_MODEM_DSR 0x0200 /* DSR for the modem line (2) */
#define DZ_MODEM_CTS 0x0100 /* CTS for the modem line (2) */
#define DZ_PRINT_RI 0x0008 /* RI for the printer line (3) */
#define DZ_PRINT_CD 0x0004 /* CD for the printer line (3) */
#define DZ_PRINT_DSR 0x0002 /* DSR for the prntr line (3) */
#define DZ_PRINT_CTS 0x0001 /* CTS for the prntr line (3) */
/*
* Definitions for the Transmit Data Register.
*/
#define DZ_BRK0 0x0100 /* Break assertion for line 0 */
#define DZ_BRK1 0x0200 /* Break assertion for line 1 */
#define DZ_BRK2 0x0400 /* Break assertion for line 2 */
#define DZ_BRK3 0x0800 /* Break assertion for line 3 */
/*
* Definitions for the Line Parameter Register.
*/
#define DZ_KEYBOARD 0x0000 /* line 0 = keyboard */
#define DZ_MOUSE 0x0001 /* line 1 = mouse */
#define DZ_MODEM 0x0002 /* line 2 = modem */
#define DZ_PRINTER 0x0003 /* line 3 = printer */
#define DZ_CSIZE 0x0018 /* Number of bits per byte (mask) */
#define DZ_CS5 0x0000 /* 5 bits per byte */
#define DZ_CS6 0x0008 /* 6 bits per byte */
#define DZ_CS7 0x0010 /* 7 bits per byte */
#define DZ_CS8 0x0018 /* 8 bits per byte */
#define DZ_CSTOPB 0x0020 /* 2 stop bits instead of one */
#define DZ_PARENB 0x0040 /* Parity enable */
#define DZ_PARODD 0x0080 /* Odd parity instead of even */
#define DZ_CBAUD 0x0E00 /* Baud Rate (mask) */
#define DZ_B50 0x0000
#define DZ_B75 0x0100
#define DZ_B110 0x0200
#define DZ_B134 0x0300
#define DZ_B150 0x0400
Annotation
- Atlas domain: Driver Families / drivers/tty.
- 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.