137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
|
|
* serial.h: Arch-dep definitions for the Etrax100 serial driver.
|
|
*
|
|
* Copyright (C) 1998, 1999, 2000 Axis Communications AB
|
|
*/
|
|
|
|
#ifndef _ETRAX_SERIAL_H
|
|
#define _ETRAX_SERIAL_H
|
|
|
|
#include <linux/circ_buf.h>
|
|
#include <asm/termios.h>
|
|
|
|
/* Software state per channel */
|
|
|
|
#ifdef __KERNEL__
|
|
/*
|
|
* This is our internal structure for each serial port's state.
|
|
*
|
|
* Many fields are paralleled by the structure used by the serial_struct
|
|
* structure.
|
|
*
|
|
* For definitions of the flags field, see tty.h
|
|
*/
|
|
|
|
#define SERIAL_RECV_DESCRIPTORS 8
|
|
|
|
struct etrax_recv_buffer {
|
|
struct etrax_recv_buffer *next;
|
|
unsigned short length;
|
|
unsigned char error;
|
|
unsigned char pad;
|
|
|
|
unsigned char buffer[0];
|
|
};
|
|
|
|
struct e100_serial {
|
|
int baud;
|
|
volatile u8 *port; /* R_SERIALx_CTRL */
|
|
u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */
|
|
|
|
/* Output registers */
|
|
volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
|
|
volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */
|
|
volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */
|
|
const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */
|
|
|
|
/* Input registers */
|
|
volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
|
|
volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */
|
|
volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */
|
|
volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */
|
|
|
|
int flags; /* defined in tty.h */
|
|
|
|
u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */
|
|
u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */
|
|
u8 iseteop; /* bit number for R_SET_EOP for the input dma */
|
|
int enabled; /* Set to 1 if the port is enabled in HW config */
|
|
|
|
u8 dma_out_enabled:1; /* Set to 1 if DMA should be used */
|
|
u8 dma_in_enabled:1; /* Set to 1 if DMA should be used */
|
|
|
|
/* end of fields defined in rs_table[] in .c-file */
|
|
u8 uses_dma_in; /* Set to 1 if DMA is used */
|
|
u8 uses_dma_out; /* Set to 1 if DMA is used */
|
|
u8 forced_eop; /* a fifo eop has been forced */
|
|
int baud_base; /* For special baudrates */
|
|
int custom_divisor; /* For special baudrates */
|
|
struct etrax_dma_descr tr_descr;
|
|
struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS];
|
|
int cur_rec_descr;
|
|
|
|
volatile int tr_running; /* 1 if output is running */
|
|
|
|
struct tty_struct *tty;
|
|
int read_status_mask;
|
|
int ignore_status_mask;
|
|
int x_char; /* xon/xoff character */
|
|
int close_delay;
|
|
unsigned short closing_wait;
|
|
unsigned short closing_wait2;
|
|
unsigned long event;
|
|
unsigned long last_active;
|
|
int line;
|
|
int type; /* PORT_ETRAX */
|
|
int count; /* # of fd on device */
|
|
int blocked_open; /* # of blocked opens */
|
|
struct circ_buf xmit;
|
|
struct etrax_recv_buffer *first_recv_buffer;
|
|
struct etrax_recv_buffer *last_recv_buffer;
|
|
unsigned int recv_cnt;
|
|
unsigned int max_recv_cnt;
|
|
|
|
struct work_struct work;
|
|
struct async_icount icount; /* error-statistics etc.*/
|
|
struct ktermios normal_termios;
|
|
struct ktermios callout_termios;
|
|
#ifdef DECLARE_WAITQUEUE
|
|
wait_queue_head_t open_wait;
|
|
wait_queue_head_t close_wait;
|
|
#else
|
|
struct wait_queue *open_wait;
|
|
struct wait_queue *close_wait;
|
|
#endif
|
|
|
|
unsigned long char_time_usec; /* The time for 1 char, in usecs */
|
|
unsigned long flush_time_usec; /* How often we should flush */
|
|
unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */
|
|
unsigned long last_tx_active; /* Last tx time in jiffies */
|
|
unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */
|
|
unsigned long last_rx_active; /* Last rx time in jiffies */
|
|
|
|
int break_detected_cnt;
|
|
int errorcode;
|
|
|
|
#ifdef CONFIG_ETRAX_RS485
|
|
struct rs485_control rs485; /* RS-485 support */
|
|
#endif
|
|
};
|
|
|
|
/* this PORT is not in the standard serial.h. it's not actually used for
|
|
* anything since we only have one type of async serial-port anyway in this
|
|
* system.
|
|
*/
|
|
|
|
#define PORT_ETRAX 1
|
|
|
|
/*
|
|
* Events are used to schedule things to happen at timer-interrupt
|
|
* time, instead of at rs interrupt time.
|
|
*/
|
|
#define RS_EVENT_WRITE_WAKEUP 0
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* !_ETRAX_SERIAL_H */
|