serial.c File Reference

#include <slibc.h>
#include <sys/types.h>
#include <sys/io.h>
#include <stdio.h>
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stddef.h>
#include <assert.h>
#include <list.h>
#include <object.h>
#include <vfs.h>
#include <device.h>
#include <serial.h>
#include <interrupt.h>
#include <isr.h>
#include <debug.h>

Include dependency graph for serial.c:

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Data Structures
struct	context

Macros
#define	DATA5   0x00
#define	DATA6   0x01
#define	DATA7   0x02
#define	DATA8   0x03
#define	EVEN_PARITY   0x02
#define	NO_PARITY   0x00
#define	ODD_PARITY   0x01
#define	SERIAL_MAX_SPEED   115200
#define	STOPBITS1   0x00
#define	STOPBITS2   0x01

Enumerations
enum	IER {   RX = 0x01, TX = 0x02, RX_STAT = 0x04, MODEM_STAT = 0x08,   SLEEP_MODE = 0x10, LOW_POWER = 0x20 }
enum	port_offset {   DATA = 0x00, INTR_ENABLE = 0x01, BAUD_LO = 0x00, BAUD_HI = 0x01,   FIFO = 0x02, LINE_CTRL = 0x03, MODEM_CTRL = 0x04, LINE_STATUS = 0x05,   MODEM_STATUS = 0x06, SCRATCH = 0x07 }

Functions
int	serial_close (struct ninfo *ninfo, struct nctx *ctx)
int	serial_init (void)
	Serial 장치를 사용할 수 있도록 초기화 하는 함수 More...
int	serial_ioctl (struct ninfo *ninfo, struct nctx *ctx, int request, va_list va)
int	serial_open (struct ninfo *ninfo, struct nctx *ctx)
int	serial_read (struct ninfo *ninfo, struct nctx *ctx, void *buf, size_t size)
int	serial_write (struct ninfo *ninfo, struct nctx *ctx, const void *buf, size_t size)

Macro Definition Documentation

#define DATA5   0x00

Definition at line 47 of file serial.c.

#define DATA6   0x01

Definition at line 48 of file serial.c.

#define DATA7   0x02

Definition at line 49 of file serial.c.

#define DATA8   0x03

Definition at line 50 of file serial.c.

#define EVEN_PARITY   0x02

Definition at line 57 of file serial.c.

#define NO_PARITY   0x00

Definition at line 55 of file serial.c.

#define ODD_PARITY   0x01

Definition at line 56 of file serial.c.

#define SERIAL_MAX_SPEED   115200

Definition at line 59 of file serial.c.

#define STOPBITS1   0x00

Definition at line 52 of file serial.c.

#define STOPBITS2   0x01

Definition at line 53 of file serial.c.

Enumeration Type Documentation

enum IER

Enumerator
RX	Enable Received Data Available Interrupt
TX	Enable Transmitter Holding Register Empty Intr
RX_STAT
MODEM_STAT	Enable Modem Status Interrupt
SLEEP_MODE	Enable Sleep Mode (16750)
LOW_POWER	Enable Low Power Mode (16750)

Definition at line 61 of file serial.c.

enum port_offset

Enumerator
DATA	Data Register (w/o DLAB)
INTR_ENABLE	Interrupt enable register (w/o DLAB)
BAUD_LO	Baudrate divisor low byte (w DLAB)
BAUD_HI	Baudrate divisor hi byte (w DLAB)
FIFO	Interrupt identification and FIFO ctrl register
LINE_CTRL	Line control register (MSB = DLAB)
MODEM_CTRL	Modem control register
LINE_STATUS	Line status register
MODEM_STATUS	Modem status register
SCRATCH	Scratch register

Definition at line 34 of file serial.c.

Function Documentation

int serial_close	(	struct ninfo *	ninfo,
		struct nctx *	ctx
	)

Note

If there is one more serial driver is exists, don't remove ISR handler.

Definition at line 213 of file serial.c.

References ninfo_dev::device, free(), IRQ_NR_SERIAL_EVEN, IRQ_NR_SERIAL_ODD, MINOR, NULL, nctx::priv, ninfo::priv, and unregister_irq().

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int serial_ioctl	(	struct ninfo *	ninfo,
		struct nctx *	ctx,
		int	request,
		va_list	va
	)

Definition at line 168 of file serial.c.

References context::baudrate, context::data, EINVAL, context::parity, nctx::priv, SERIAL_CMD_BAUDRATE, SERIAL_CMD_DATA, SERIAL_CMD_ENTER_SETUP, SERIAL_CMD_LEAVE_SETUP, SERIAL_CMD_PARITY, SERIAL_CMD_STOP, context::setup, context::stop, va_arg, and context::validate.

int serial_open	(	struct ninfo *	ninfo,
		struct nctx *	ctx
	)

Note

If a isr is already registered, do not add this again

Definition at line 107 of file serial.c.

References ninfo_dev::device, ENODEV, ENOMEM, free(), IRQ_NR_SERIAL_EVEN, IRQ_NR_SERIAL_ODD, malloc(), MINOR, NORMAL_PRIORITY, NULL, nctx::offset, nctx::priv, ninfo::priv, and register_irq().

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int serial_read	(	struct ninfo *	ninfo,
		struct nctx *	ctx,
		void *	buf,
		size_t	size
	)

Definition at line 141 of file serial.c.

References EBUSY, nctx::priv, and context::setup.

int serial_write	(	struct ninfo *	ninfo,
		struct nctx *	ctx,
		const void *	buf,
		size_t	size
	)

Definition at line 154 of file serial.c.

References EBUSY, nctx::priv, and context::setup.