drivers/serial/serial_atmel.h

   1 /* serial-atmel.h: Definitions for the Atmel serial driver.
   2  *
   3  * Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>,
   4  *                     D. Jeff Dionne <jeff@uClinux.org>,
   5  *                     The Silver Hammer Group, Ltd.
   6  * Copyright (C) 2004 Hyok S. Choi <hyok.choi@samsung.com>
   7  *                         2.6 port
   8  *
   9  * Based on:
  10  *
  11  * drivers/char/68328serial.h
  12  *
  13  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
  14  */
  15
  16 #ifndef _ATMEL_SERIAL_H
  17 #define _ATMEL_SERIAL_H
  18
  19 #include <linux/config.h>
  20 #include <asm/page.h>
  21 #include <asm/arch/hardware.h>
  22
  23 /*
  24  * For the close wait times, 0 means wait forever for serial port to
  25  * flush its output.  65535 means don't wait at all.
  26  */
  27 #define S_CLOSING_WAIT_INF      0
  28 #define S_CLOSING_WAIT_NONE     65535
  29
  30 /*
  31  * Definitions for S_struct (and serial_struct) flags field
  32  */
  33 #define S_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
  34                                    on the callout port */
  35 #define S_FOURPORT  0x0002      /* Set OU1, OUT2 per AST Fourport settings */
  36 #define S_SAK   0x0004  /* Secure Attention Key (Orange book) */
  37 #define S_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
  38
  39 #define S_SPD_MASK      0x0030
  40 #define S_SPD_HI        0x0010  /* Use 56000 instead of 38400 bps */
  41
  42 #define S_SPD_VHI       0x0020  /* Use 115200 instead of 38400 bps */
  43 #define S_SPD_CUST      0x0030  /* Use user-specified divisor */
  44
  45 #define S_SKIP_TEST     0x0040 /* Skip UART test during autoconfiguration */
  46 #define S_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */
  47 #define S_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
  48 #define S_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */
  49 #define S_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */
  50
  51 #define S_FLAGS 0x0FFF  /* Possible legal S flags */
  52 #define S_USR_MASK 0x0430       /* Legal flags that non-privileged
  53                                  * users can set or reset */
  54
  55 /* Internal flags used only by kernel/chr_drv/serial.c */
  56 #define S_INITIALIZED   0x80000000 /* Serial port was initialized */
  57 #define S_CALLOUT_ACTIVE        0x40000000 /* Call out device is active */
  58 #define S_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
  59 #define S_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
  60 #define S_CLOSING               0x08000000 /* Serial port is closing */
  61 #define S_CTS_FLOW              0x04000000 /* Do CTS flow control */
  62 #define S_CHECK_CD              0x02000000 /* i.e., CLOCAL */
  63
  64 #define RS_EVENT_WRITE_WAKEUP   0
  65 #define SERIAL_MAGIC 0x5301
  66
  67 /* Software state per channel */
  68
  69 /*
  70  * This is our internal structure for each serial port's state.
  71  *
  72  * Many fields are paralleled by the structure used by the serial_struct
  73  * structure.
  74  *
  75  * For definitions of the flags field, see tty.h
  76  */
  77
  78 struct atmel_serial {
  79         char soft_carrier;  /* Use soft carrier on this channel */
  80         char break_abort;   /* Is serial console in, so process brk/abrt */
  81         char is_cons;       /* Is this our console. */
  82
  83         /* We need to know the current clock divisor
  84          * to read the bps rate the chip has currently
  85          * loaded.
  86          */
  87         unsigned char clk_divisor;  /* May be 1, 16, 32, or 64 */
  88         int baud;
  89         int                     magic;
  90         int                     baud_base;
  91         int                     port;
  92         int                     irq;
  93         int                     irqmask;
  94         int                     flags;          /* defined in tty.h */
  95         int                     type;           /* UART type */
  96         int                     use_ints;
  97         volatile struct atmel_usart_regs        *usart;
  98         int                     cts_state;
  99         struct tty_struct       *tty;
 100         int                     read_status_mask;
 101         int                     ignore_status_mask;
 102         int                     timeout;
 103         int                     xmit_fifo_size;
 104         int                     custom_divisor;
 105         int                     x_char; /* xon/xoff character */
 106         int                     close_delay;
 107         unsigned short          closing_wait;
 108         unsigned short          closing_wait2;
 109         unsigned long           event;
 110         unsigned long           last_active;
 111         int                     line;
 112         int                     count;      /* # of fd on device */
 113         int                     blocked_open; /* # of blocked opens */
 114         unsigned char           *xmit_buf;
 115         unsigned char           *rx_buf;
 116         int                     xmit_head;
 117         int                     xmit_tail;
 118         int                     xmit_cnt;
 119         struct work_struct      tqueue;
 120         struct work_struct      tqueue_hangup;
 121         wait_queue_head_t       open_wait;
 122         wait_queue_head_t       close_wait;
 123 };
 124
 125 #endif /* !(_ATMEL_SERIAL_H) */