English
- /*
- * 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/config.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 */
- volatile u32 *ohwswadr; /* adr to R_DMA_CHx_HWSW */
- volatile u32 *odescradr; /* adr to R_DMA_CHx_DESCR */
- /* 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 */
- const volatile u8 *istatusadr; /* adr to R_DMA_CHx_STATUS */
- volatile u32 *ihwswadr; /* adr to R_DMA_CHx_HWSW */
- 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 */
- /* end of fields defined in rs_table[] in .c-file */
- int uses_dma; /* Set to 1 if DMA should be used */
- unsigned char forced_eop; /* a fifo eop has been forced */
- 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 */
- long session; /* Session of opening process */
- long pgrp; /* pgrp of opening process */
- 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 tq_struct tqueue;
- struct async_icount icount; /* error-statistics etc.*/
- struct termios normal_termios;
- struct termios 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 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_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 */
