linux/drivers/tty/serial/crisv10.h
Peter Hurley f5bce77300 cris: Remove obsolete ASYNC_SPLIT_TERMIOS behavior
ASYNC_SPLIT_TERMIOS behavior is a remnant of the long-dead /dev/cuaXX
callout device. Split termios handling was removed tree-wide in v2.5.71 by:

commit 99a21edebbfd8c29e39ee7fcc8a1ffa423657290
Author: Alexander Viro <viro@www.linux.org.uk>
Date:   Wed Jun 11 07:41:28 2003 -0700

    [PATCH] tty_driver refcounting

    killed the last remnants of callout stuff - we don't need to mess with
    storing termios privately anymore.

which pre-dated the re-introduction into the cris serial driver
in v2.6.7 by:

commit 311a5ffeda8ccb3f1f3840069f37234e043092d4
Author: Andrew Morton <akpm@osdl.org>
Date:   Mon May 31 18:52:29 2004 -0700

    [PATCH] CRIS architecture update

    From: "Mikael Starvik" <mikael.starvik@axis.com>

    - Lots of fixes from 2.4.

    - Updated for 2.6.6.

    - Added IDE driver

Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-05 20:18:30 -08:00

133 lines
3.8 KiB
C

/*
* serial.h: Arch-dep definitions for the Etrax100 serial driver.
*
* Copyright (C) 1998-2007 Axis Communications AB
*/
#ifndef _ETRAX_SERIAL_H
#define _ETRAX_SERIAL_H
#include <linux/circ_buf.h>
#include <asm/termios.h>
#include <asm/dma.h>
#include <arch/io_interface_mux.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 {
struct tty_port port;
int baud;
volatile u8 *ioport; /* 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 */
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; /* Set to 1 if DMA should be used */
u8 dma_in_enabled; /* Set to 1 if DMA should be used */
/* end of fields defined in rs_table[] in .c-file */
int dma_owner;
unsigned int dma_in_nbr;
unsigned int dma_out_nbr;
unsigned int dma_in_irq_nbr;
unsigned int dma_out_irq_nbr;
unsigned long dma_in_irq_flags;
unsigned long dma_out_irq_flags;
char *dma_in_irq_description;
char *dma_out_irq_description;
enum cris_io_interface io_if;
char *io_if_description;
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 */
int x_char; /* xon/xoff character */
unsigned long event;
int line;
int type; /* PORT_ETRAX */
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.*/
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 serial_rs485 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 */