include/linux/serialP.h

   1 /*
   2  * Private header file for the (dumb) serial driver
   3  *
   4  * Copyright (C) 1997 by Theodore Ts'o.
   5  *
   6  * Redistribution of this file is permitted under the terms of the GNU
   7  * Public License (GPL)
   8  */
   9
  10 #ifndef _LINUX_SERIALP_H
  11 #define _LINUX_SERIALP_H
  12
  13 /*
  14  * This is our internal structure for each serial port's state.
  15  *
  16  * Many fields are paralleled by the structure used by the serial_struct
  17  * structure.
  18  *
  19  * For definitions of the flags field, see tty.h
  20  */
  21
  22 #include <linux/version.h>
  23 #include <linux/config.h>
  24 #include <linux/termios.h>
  25 #include <linux/workqueue.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/circ_buf.h>
  28 #include <linux/wait.h>
  29
  30 struct serial_state {
  31         int     magic;
  32         int     baud_base;
  33         unsigned long   port;
  34         int     irq;
  35         int     flags;
  36         int     hub6;
  37         int     type;
  38         int     line;
  39         int     revision;       /* Chip revision (950) */
  40         int     xmit_fifo_size;
  41         int     custom_divisor;
  42         int     count;
  43         u8      *iomem_base;
  44         u16     iomem_reg_shift;
  45         unsigned short  close_delay;
  46         unsigned short  closing_wait; /* time to wait before closing */
  47         struct async_icount     icount;
  48         int     io_type;
  49         struct async_struct *info;
  50         struct pci_dev  *dev;
  51 };
  52
  53 struct async_struct {
  54         int                     magic;
  55         unsigned long           port;
  56         int                     hub6;
  57         int                     flags;
  58         int                     xmit_fifo_size;
  59         struct serial_state     *state;
  60         struct tty_struct       *tty;
  61         int                     read_status_mask;
  62         int                     ignore_status_mask;
  63         int                     timeout;
  64         int                     quot;
  65         int                     x_char; /* xon/xoff character */
  66         int                     close_delay;
  67         unsigned short          closing_wait;
  68         unsigned short          closing_wait2; /* obsolete */
  69         int                     IER;    /* Interrupt Enable Register */
  70         int                     MCR;    /* Modem control register */
  71         int                     LCR;    /* Line control register */
  72         int                     ACR;     /* 16950 Additional Control Reg. */
  73         unsigned long           event;
  74         unsigned long           last_active;
  75         int                     line;
  76         int                     blocked_open; /* # of blocked opens */
  77         struct circ_buf         xmit;
  78         spinlock_t              xmit_lock;
  79         u8                      *iomem_base;
  80         u16                     iomem_reg_shift;
  81         int                     io_type;
  82         struct work_struct                      work;
  83         struct tasklet_struct   tlet;
  84 #ifdef DECLARE_WAITQUEUE
  85         wait_queue_head_t       open_wait;
  86         wait_queue_head_t       close_wait;
  87         wait_queue_head_t       delta_msr_wait;
  88 #else
  89         struct wait_queue       *open_wait;
  90         struct wait_queue       *close_wait;
  91         struct wait_queue       *delta_msr_wait;
  92 #endif
  93         struct async_struct     *next_port; /* For the linked list */
  94         struct async_struct     *prev_port;
  95 };
  96
  97 #define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base))
  98
  99 #define SERIAL_MAGIC 0x5301
 100 #define SSTATE_MAGIC 0x5302
 101
 102 /*
 103  * Events are used to schedule things to happen at timer-interrupt
 104  * time, instead of at rs interrupt time.
 105  */
 106 #define RS_EVENT_WRITE_WAKEUP   0
 107
 108 /*
 109  * Multiport serial configuration structure --- internal structure
 110  */
 111 struct rs_multiport_struct {
 112         int             port1;
 113         unsigned char   mask1, match1;
 114         int             port2;
 115         unsigned char   mask2, match2;
 116         int             port3;
 117         unsigned char   mask3, match3;
 118         int             port4;
 119         unsigned char   mask4, match4;
 120         int             port_monitor;
 121 };
 122
 123 #if defined(__alpha__) && !defined(CONFIG_PCI)
 124 /*
 125  * Digital did something really horribly wrong with the OUT1 and OUT2
 126  * lines on at least some ALPHA's.  The failure mode is that if either
 127  * is cleared, the machine locks up with endless interrupts.
 128  *
 129  * This is still used by arch/mips/au1000/common/serial.c for some weird
 130  * reason (mips != alpha!)
 131  */
 132 #define ALPHA_KLUDGE_MCR  (UART_MCR_OUT2 | UART_MCR_OUT1)
 133 #elif defined(CONFIG_SBC8560)
 134 /*
 135  * WindRiver did something similarly broken on their SBC8560 board. The
 136  * UART tristates its IRQ output while OUT2 is clear, but they pulled
 137  * the interrupt line _up_ instead of down, so if we register the IRQ
 138  * while the UART is in that state, we die in an IRQ storm. */
 139 #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
 140 #else
 141 #define ALPHA_KLUDGE_MCR 0
 142 #endif
 143
 144 /*
 145  * Definitions for PCI support.
 146  */
 147 #define SPCI_FL_BASE_MASK       0x0007
 148 #define SPCI_FL_BASE0   0x0000
 149 #define SPCI_FL_BASE1   0x0001
 150 #define SPCI_FL_BASE2   0x0002
 151 #define SPCI_FL_BASE3   0x0003
 152 #define SPCI_FL_BASE4   0x0004
 153 #define SPCI_FL_GET_BASE(x)     (x & SPCI_FL_BASE_MASK)
 154
 155 #define SPCI_FL_IRQ_MASK       (0x0007 << 4)
 156 #define SPCI_FL_IRQBASE0       (0x0000 << 4)
 157 #define SPCI_FL_IRQBASE1       (0x0001 << 4)
 158 #define SPCI_FL_IRQBASE2       (0x0002 << 4)
 159 #define SPCI_FL_IRQBASE3       (0x0003 << 4)
 160 #define SPCI_FL_IRQBASE4       (0x0004 << 4)
 161 #define SPCI_FL_GET_IRQBASE(x)        ((x & SPCI_FL_IRQ_MASK) >> 4)
 162
 163 /* Use successive BARs (PCI base address registers),
 164    else use offset into some specified BAR */
 165 #define SPCI_FL_BASE_TABLE      0x0100
 166
 167 /* Use successive entries in the irq resource table */
 168 #define SPCI_FL_IRQ_TABLE       0x0200
 169
 170 /* Use the irq resource table instead of dev->irq */
 171 #define SPCI_FL_IRQRESOURCE     0x0400
 172
 173 /* Use the Base address register size to cap number of ports */
 174 #define SPCI_FL_REGION_SZ_CAP   0x0800
 175
 176 /* Do not use irq sharing for this device */
 177 #define SPCI_FL_NO_SHIRQ        0x1000
 178
 179 /* This is a PNP device */
 180 #define SPCI_FL_ISPNP           0x2000
 181
 182 #define SPCI_FL_PNPDEFAULT      (SPCI_FL_IRQRESOURCE|SPCI_FL_ISPNP)
 183
 184 #endif /* _LINUX_SERIAL_H */