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/* Remote serial interface for local (hardwired) serial ports for GO32.
   Copyright (C) 1992, 1993, 2000, 2001, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.
 
   Contributed by Nigel Stephens, Algorithmics Ltd. (nigel@algor.co.uk).
 
   This version uses DPMI interrupts to handle buffered i/o
   without the separate "asynctsr" program.
 
   This file is part of GDB.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
#include "defs.h"
#include "gdbcmd.h"
#include "serial.h"
#include "gdb_string.h"
 
 
/*
 * NS16550 UART registers
 */
 
#define COM1ADDR        0x3f8
#define COM2ADDR        0x2f8
#define COM3ADDR        0x3e8
#define COM4ADDR        0x3e0
 
#define com_data        0        /* data register (R/W) */
#define com_dlbl        0        /* divisor latch low (W) */
#define com_ier         1       /* interrupt enable (W) */
#define com_dlbh        1       /* divisor latch high (W) */
#define com_iir         2       /* interrupt identification (R) */
#define com_fifo        2       /* FIFO control (W) */
#define com_lctl        3       /* line control register (R/W) */
#define com_cfcr        3       /* line control register (R/W) */
#define com_mcr         4       /* modem control register (R/W) */
#define com_lsr         5       /* line status register (R/W) */
#define com_msr         6       /* modem status register (R/W) */
 
/*
 * Constants for computing 16 bit baud rate divisor (lower byte
 * in com_dlbl, upper in com_dlbh) from 1.8432MHz crystal.  Divisor is
 * 1.8432 MHz / (16 * X) for X bps.  If the baud rate can't be set
 * to within +- (desired_rate*SPEED_TOLERANCE/1000) bps, we fail.
 */
#define COMTICK         (1843200/16)
#define SPEED_TOLERANCE 30      /* thousandths; real == desired +- 3.0% */
 
/* interrupt enable register */
#define IER_ERXRDY      0x1     /* int on rx ready */
#define IER_ETXRDY      0x2     /* int on tx ready */
#define IER_ERLS        0x4     /* int on line status change */
#define IER_EMSC        0x8     /* int on modem status change */
 
/* interrupt identification register */
#define IIR_FIFO_MASK   0xc0    /* set if FIFOs are enabled */
#define IIR_IMASK       0xf     /* interrupt cause mask */
#define IIR_NOPEND      0x1     /* nothing pending */
#define IIR_RLS         0x6     /* receive line status */
#define IIR_RXRDY       0x4     /* receive ready */
#define IIR_RXTOUT      0xc     /* receive timeout */
#define IIR_TXRDY       0x2     /* transmit ready */
#define IIR_MLSC        0x0     /* modem status */
 
 
/* fifo control register */
#define FIFO_ENABLE     0x01    /* enable fifo */
#define FIFO_RCV_RST    0x02    /* reset receive fifo */
#define FIFO_XMT_RST    0x04    /* reset transmit fifo */
#define FIFO_DMA_MODE   0x08    /* enable dma mode */
#define FIFO_TRIGGER_1  0x00    /* trigger at 1 char */
#define FIFO_TRIGGER_4  0x40    /* trigger at 4 chars */
#define FIFO_TRIGGER_8  0x80    /* trigger at 8 chars */
#define FIFO_TRIGGER_14 0xc0    /* trigger at 14 chars */
 
/* character format control register */
#define CFCR_DLAB       0x80    /* divisor latch */
#define CFCR_SBREAK     0x40    /* send break */
#define CFCR_PZERO      0x30    /* zero parity */
#define CFCR_PONE       0x20    /* one parity */
#define CFCR_PEVEN      0x10    /* even parity */
#define CFCR_PODD       0x00    /* odd parity */
#define CFCR_PENAB      0x08    /* parity enable */
#define CFCR_STOPB      0x04    /* 2 stop bits */
#define CFCR_8BITS      0x03    /* 8 data bits */
#define CFCR_7BITS      0x02    /* 7 data bits */
#define CFCR_6BITS      0x01    /* 6 data bits */
#define CFCR_5BITS      0x00    /* 5 data bits */
 
/* modem control register */
#define MCR_LOOPBACK    0x10    /* loopback */
#define MCR_IENABLE     0x08    /* output 2 = int enable */
#define MCR_DRS         0x04    /* output 1 = xxx */
#define MCR_RTS         0x02    /* enable RTS */
#define MCR_DTR         0x01    /* enable DTR */
 
/* line status register */
#define LSR_RCV_FIFO    0x80    /* error in receive fifo */
#define LSR_TSRE        0x40    /* transmitter empty */
#define LSR_TXRDY       0x20    /* transmitter ready */
#define LSR_BI          0x10    /* break detected */
#define LSR_FE          0x08    /* framing error */
#define LSR_PE          0x04    /* parity error */
#define LSR_OE          0x02    /* overrun error */
#define LSR_RXRDY       0x01    /* receiver ready */
#define LSR_RCV_MASK    0x1f
 
/* modem status register */
#define MSR_DCD         0x80
#define MSR_RI          0x40
#define MSR_DSR         0x20
#define MSR_CTS         0x10
#define MSR_DDCD        0x08
#define MSR_TERI        0x04
#define MSR_DDSR        0x02
#define MSR_DCTS        0x01
 
#include <time.h>
#include <dos.h>
#include <go32.h>
#include <dpmi.h>
typedef unsigned long u_long;
 
/* 16550 rx fifo trigger point */
#define FIFO_TRIGGER    FIFO_TRIGGER_4
 
/* input buffer size */
#define CBSIZE  4096
 
#define RAWHZ   18
 
#ifdef DOS_STATS
#define CNT_RX          16
#define CNT_TX          17
#define CNT_STRAY       18
#define CNT_ORUN        19
#define NCNT            20
 
static int intrcnt;
static int cnts[NCNT];
static char *cntnames[NCNT] =
{
  /* h/w interrupt counts. */
  "mlsc", "nopend", "txrdy", "?3",
  "rxrdy", "?5", "rls", "?7",
  "?8", "?9", "?a", "?b",
  "rxtout", "?d", "?e", "?f",
  /* s/w counts. */
  "rxcnt", "txcnt", "stray", "swoflo"
};
 
#define COUNT(x) cnts[x]++
#else
#define COUNT(x)
#endif
 
/* Main interrupt controller port addresses. */
#define ICU_BASE        0x20
#define ICU_OCW2        (ICU_BASE + 0)
#define ICU_MASK        (ICU_BASE + 1)
 
/* Original interrupt controller mask register. */
unsigned char icu_oldmask;
 
/* Maximum of 8 interrupts (we don't handle the slave icu yet). */
#define NINTR   8
 
static struct intrupt
  {
    char inuse;
    struct dos_ttystate *port;
    _go32_dpmi_seginfo old_rmhandler;
    _go32_dpmi_seginfo old_pmhandler;
    _go32_dpmi_seginfo new_rmhandler;
    _go32_dpmi_seginfo new_pmhandler;
    _go32_dpmi_registers regs;
  }
intrupts[NINTR];
 
 
static struct dos_ttystate
  {
    int base;
    int irq;
    int refcnt;
    struct intrupt *intrupt;
    int fifo;
    int baudrate;
    unsigned char cbuf[CBSIZE];
    unsigned int first;
    unsigned int count;
    int txbusy;
    unsigned char old_mcr;
    int ferr;
    int perr;
    int oflo;
    int msr;
  }
ports[4] =
{
  {
    COM1ADDR, 4, 0, NULL, 0, 0, "", 0, 0, 0, 0, 0, 0, 0, 0
  }
  ,
  {
    COM2ADDR, 3, 0, NULL, 0, 0, "", 0, 0, 0, 0, 0, 0, 0, 0
  }
  ,
  {
    COM3ADDR, 4, 0, NULL, 0, 0, "", 0, 0, 0, 0, 0, 0, 0, 0
  }
  ,
  {
    COM4ADDR, 3, 0, NULL, 0, 0, "", 0, 0, 0, 0, 0, 0, 0, 0
  }
};
 
static int dos_open (struct serial *scb, const char *name);
static void dos_raw (struct serial *scb);
static int dos_readchar (struct serial *scb, int timeout);
static int dos_setbaudrate (struct serial *scb, int rate);
static int dos_write (struct serial *scb, const char *str, int len);
static void dos_close (struct serial *scb);
static serial_ttystate dos_get_tty_state (struct serial *scb);
static int dos_set_tty_state (struct serial *scb, serial_ttystate state);
static int dos_baudconv (int rate);
 
#define inb(p,a)        inportb((p)->base + (a))
#define outb(p,a,v)     outportb((p)->base + (a), (v))
#define disable()       asm volatile ("cli");
#define enable()        asm volatile ("sti");
 
 
static int
dos_getc (volatile struct dos_ttystate *port)
{
  int c;
 
  if (port->count == 0)
    return -1;
 
  c = port->cbuf[port->first];
  disable ();
  port->first = (port->first + 1) & (CBSIZE - 1);
  port->count--;
  enable ();
  return c;
}
 
 
static int
dos_putc (int c, struct dos_ttystate *port)
{
  if (port->count >= CBSIZE - 1)
    return -1;
  port->cbuf[(port->first + port->count) & (CBSIZE - 1)] = c;
  port->count++;
  return 0;
}
 
 
 
static void
dos_comisr (int irq)
{
  struct dos_ttystate *port;
  unsigned char iir, lsr, c;
 
  disable ();                   /* Paranoia */
  outportb (ICU_OCW2, 0x20);    /* End-Of-Interrupt */
#ifdef DOS_STATS
  ++intrcnt;
#endif
 
  port = intrupts[irq].port;
  if (!port)
    {
      COUNT (CNT_STRAY);
      return;                   /* not open */
    }
 
  while (1)
    {
      iir = inb (port, com_iir) & IIR_IMASK;
      switch (iir)
        {
 
        case IIR_RLS:
          lsr = inb (port, com_lsr);
          goto rx;
 
        case IIR_RXTOUT:
        case IIR_RXRDY:
          lsr = 0;
 
        rx:
          do
            {
              c = inb (port, com_data);
              if (lsr & (LSR_BI | LSR_FE | LSR_PE | LSR_OE))
                {
                  if (lsr & (LSR_BI | LSR_FE))
                    port->ferr++;
                  else if (lsr & LSR_PE)
                    port->perr++;
                  if (lsr & LSR_OE)
                    port->oflo++;
                }
 
              if (dos_putc (c, port) < 0)
                {
                  COUNT (CNT_ORUN);
                }
              else
                {
                  COUNT (CNT_RX);
                }
            }
          while ((lsr = inb (port, com_lsr)) & LSR_RXRDY);
          break;
 
        case IIR_MLSC:
          /* could be used to flowcontrol Tx */
          port->msr = inb (port, com_msr);
          break;
 
        case IIR_TXRDY:
          port->txbusy = 0;
          break;
 
        case IIR_NOPEND:
          /* no more pending interrupts, all done */
          return;
 
        default:
          /* unexpected interrupt, ignore */
          break;
        }
      COUNT (iir);
    }
}
 
#define ISRNAME(x) dos_comisr##x
#define ISR(x) static void ISRNAME(x)(void) {dos_comisr(x);}
 
ISR (0) ISR (1) ISR (2) ISR (3) /* OK */
ISR (4) ISR (5) ISR (6) ISR (7) /* OK */
 
typedef void (*isr_t) (void);
 
static isr_t isrs[NINTR] =
  {
       ISRNAME (0), ISRNAME (1), ISRNAME (2), ISRNAME (3),
       ISRNAME (4), ISRNAME (5), ISRNAME (6), ISRNAME (7)
  };
 
 
 
static struct intrupt *
dos_hookirq (unsigned int irq)
{
  struct intrupt *intr;
  unsigned int vec;
  isr_t isr;
 
  if (irq >= NINTR)
    return 0;
 
  intr = &intrupts[irq];
  if (intr->inuse)
    return 0;
 
  vec = 0x08 + irq;
  isr = isrs[irq];
 
  /* setup real mode handler */
  _go32_dpmi_get_real_mode_interrupt_vector (vec, &intr->old_rmhandler);
 
  intr->new_rmhandler.pm_selector = _go32_my_cs ();
  intr->new_rmhandler.pm_offset = (u_long) isr;
  if (_go32_dpmi_allocate_real_mode_callback_iret (&intr->new_rmhandler,
                                                   &intr->regs))
    {
      return 0;
    }
 
  if (_go32_dpmi_set_real_mode_interrupt_vector (vec, &intr->new_rmhandler))
    {
      return 0;
    }
 
  /* setup protected mode handler */
  _go32_dpmi_get_protected_mode_interrupt_vector (vec, &intr->old_pmhandler);
 
  intr->new_pmhandler.pm_selector = _go32_my_cs ();
  intr->new_pmhandler.pm_offset = (u_long) isr;
  _go32_dpmi_allocate_iret_wrapper (&intr->new_pmhandler);
 
  if (_go32_dpmi_set_protected_mode_interrupt_vector (vec,
                                                      &intr->new_pmhandler))
    {
      return 0;
    }
 
  /* setup interrupt controller mask */
  disable ();
  outportb (ICU_MASK, inportb (ICU_MASK) & ~(1 << irq));
  enable ();
 
  intr->inuse = 1;
  return intr;
}
 
 
static void
dos_unhookirq (struct intrupt *intr)
{
  unsigned int irq, vec;
  unsigned char mask;
 
  irq = intr - intrupts;
  vec = 0x08 + irq;
 
  /* restore old interrupt mask bit */
  mask = 1 << irq;
  disable ();
  outportb (ICU_MASK, inportb (ICU_MASK) | (mask & icu_oldmask));
  enable ();
 
  /* remove real mode handler */
  _go32_dpmi_set_real_mode_interrupt_vector (vec, &intr->old_rmhandler);
  _go32_dpmi_free_real_mode_callback (&intr->new_rmhandler);
 
  /* remove protected mode handler */
  _go32_dpmi_set_protected_mode_interrupt_vector (vec, &intr->old_pmhandler);
  _go32_dpmi_free_iret_wrapper (&intr->new_pmhandler);
  intr->inuse = 0;
}
 
 
 
static int
dos_open (struct serial *scb, const char *name)
{
  struct dos_ttystate *port;
  int fd, i;
 
  if (strncasecmp (name, "/dev/", 5) == 0)
    name += 5;
  else if (strncasecmp (name, "\\dev\\", 5) == 0)
    name += 5;
 
  if (strlen (name) != 4 || strncasecmp (name, "com", 3) != 0)
    {
      errno = ENOENT;
      return -1;
    }
 
  if (name[3] < '1' || name[3] > '4')
    {
      errno = ENOENT;
      return -1;
    }
 
  /* FIXME: this is a Bad Idea (tm)!  One should *never* invent file
     handles, since they might be already used by other files/devices.
     The Right Way to do this is to create a real handle by dup()'ing
     some existing one.  */
  fd = name[3] - '1';
  port = &ports[fd];
  if (port->refcnt++ > 0)
    {
      /* Device already opened another user.  Just point at it. */
      scb->fd = fd;
      return 0;
    }
 
  /* force access to ID reg */
  outb (port, com_cfcr, 0);
  outb (port, com_iir, 0);
  for (i = 0; i < 17; i++)
    {
      if ((inb (port, com_iir) & 0x38) == 0)
        goto ok;
      (void) inb (port, com_data);      /* clear recv */
    }
  errno = ENODEV;
  return -1;
 
ok:
  /* disable all interrupts in chip */
  outb (port, com_ier, 0);
 
  /* tentatively enable 16550 fifo, and see if it responds */
  outb (port, com_fifo,
        FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER);
  sleep (1);
  port->fifo = ((inb (port, com_iir) & IIR_FIFO_MASK) == IIR_FIFO_MASK);
 
  /* clear pending status reports. */
  (void) inb (port, com_lsr);
  (void) inb (port, com_msr);
 
  /* enable external interrupt gate (to avoid floating IRQ) */
  outb (port, com_mcr, MCR_IENABLE);
 
  /* hook up interrupt handler and initialise icu */
  port->intrupt = dos_hookirq (port->irq);
  if (!port->intrupt)
    {
      outb (port, com_mcr, 0);
      outb (port, com_fifo, 0);
      errno = ENODEV;
      return -1;
    }
 
  disable ();
 
  /* record port */
  port->intrupt->port = port;
  scb->fd = fd;
 
  /* clear rx buffer, tx busy flag and overflow count */
  port->first = port->count = 0;
  port->txbusy = 0;
  port->oflo = 0;
 
  /* set default baud rate and mode: 9600,8,n,1 */
  i = dos_baudconv (port->baudrate = 9600);
  outb (port, com_cfcr, CFCR_DLAB);
  outb (port, com_dlbl, i & 0xff);
  outb (port, com_dlbh, i >> 8);
  outb (port, com_cfcr, CFCR_8BITS);
 
  /* enable all interrupts */
  outb (port, com_ier, IER_ETXRDY | IER_ERXRDY | IER_ERLS | IER_EMSC);
 
  /* enable DTR & RTS */
  outb (port, com_mcr, MCR_DTR | MCR_RTS | MCR_IENABLE);
 
  enable ();
 
  return 0;
}
 
 
static void
dos_close (struct serial *scb)
{
  struct dos_ttystate *port;
  struct intrupt *intrupt;
 
  if (!scb)
    return;
 
  port = &ports[scb->fd];
 
  if (port->refcnt-- > 1)
    return;
 
  if (!(intrupt = port->intrupt))
    return;
 
  /* disable interrupts, fifo, flow control */
  disable ();
  port->intrupt = 0;
  intrupt->port = 0;
  outb (port, com_fifo, 0);
  outb (port, com_ier, 0);
  enable ();
 
  /* unhook handler, and disable interrupt gate */
  dos_unhookirq (intrupt);
  outb (port, com_mcr, 0);
 
  /* Check for overflow errors */
  if (port->oflo)
    {
      fprintf_unfiltered (gdb_stderr,
                          "Serial input overruns occurred.\n");
      fprintf_unfiltered (gdb_stderr, "This system %s handle %d baud.\n",
                          port->fifo ? "cannot" : "needs a 16550 to",
                          port->baudrate);
    }
}
 
 
 
static int
dos_noop (struct serial *scb)
{
  return 0;
}
 
static void
dos_raw (struct serial *scb)
{
  /* Always in raw mode */
}
 
static int
dos_readchar (struct serial *scb, int timeout)
{
  struct dos_ttystate *port = &ports[scb->fd];
  long then;
  int c;
 
  then = rawclock () + (timeout * RAWHZ);
  while ((c = dos_getc (port)) < 0)
    {
      if (timeout >= 0 && (rawclock () - then) >= 0)
        return SERIAL_TIMEOUT;
    }
 
  return c;
}
 
 
static serial_ttystate
dos_get_tty_state (struct serial *scb)
{
  struct dos_ttystate *port = &ports[scb->fd];
  struct dos_ttystate *state;
 
  /* Are they asking about a port we opened?  */
  if (port->refcnt <= 0)
    {
      /* We've never heard about this port.  We should fail this call,
         unless they are asking about one of the 3 standard handles,
         in which case we pretend the handle was open by us if it is
         connected to a terminal device.  This is beacuse Unix
         terminals use the serial interface, so GDB expects the
         standard handles to go through here.  */
      if (scb->fd >= 3 || !isatty (scb->fd))
        return NULL;
    }
 
  state = (struct dos_ttystate *) xmalloc (sizeof *state);
  *state = *port;
  return (serial_ttystate) state;
}
 
static int
dos_set_tty_state (struct serial *scb, serial_ttystate ttystate)
{
  struct dos_ttystate *state;
 
  state = (struct dos_ttystate *) ttystate;
  dos_setbaudrate (scb, state->baudrate);
  return 0;
}
 
static int
dos_noflush_set_tty_state (struct serial *scb, serial_ttystate new_ttystate,
                           serial_ttystate old_ttystate)
{
  struct dos_ttystate *state;
 
  state = (struct dos_ttystate *) new_ttystate;
  dos_setbaudrate (scb, state->baudrate);
  return 0;
}
 
static int
dos_flush_input (struct serial *scb)
{
  struct dos_ttystate *port = &ports[scb->fd];
 
  disable ();
  port->first = port->count = 0;
  if (port->fifo)
    outb (port, com_fifo, FIFO_ENABLE | FIFO_RCV_RST | FIFO_TRIGGER);
  enable ();
  return 0;
}
 
static void
dos_print_tty_state (struct serial *scb, serial_ttystate ttystate,
                     struct ui_file *stream)
{
  /* Nothing to print */
  return;
}
 
static int
dos_baudconv (int rate)
{
  long x, err;
 
  if (rate <= 0)
    return -1;
 
#define divrnd(n, q)    (((n) * 2 / (q) + 1) / 2) /* divide and round off */
  x = divrnd (COMTICK, rate);
  if (x <= 0)
    return -1;
 
  err = divrnd (1000 * COMTICK, x * rate) - 1000;
  if (err < 0)
    err = -err;
  if (err > SPEED_TOLERANCE)
    return -1;
#undef divrnd
  return x;
}
 
 
static int
dos_setbaudrate (struct serial *scb, int rate)
{
  struct dos_ttystate *port = &ports[scb->fd];
 
  if (port->baudrate != rate)
    {
      int x;
      unsigned char cfcr;
 
      x = dos_baudconv (rate);
      if (x <= 0)
        {
          fprintf_unfiltered (gdb_stderr, "%d: impossible baudrate\n", rate);
          errno = EINVAL;
          return -1;
        }
 
      disable ();
      cfcr = inb (port, com_cfcr);
 
      outb (port, com_cfcr, CFCR_DLAB);
      outb (port, com_dlbl, x & 0xff);
      outb (port, com_dlbh, x >> 8);
      outb (port, com_cfcr, cfcr);
      port->baudrate = rate;
      enable ();
    }
 
  return 0;
}
 
static int
dos_setstopbits (struct serial *scb, int num)
{
  struct dos_ttystate *port = &ports[scb->fd];
  unsigned char cfcr;
 
  disable ();
  cfcr = inb (port, com_cfcr);
 
  switch (num)
    {
    case SERIAL_1_STOPBITS:
      outb (port, com_cfcr, cfcr & ~CFCR_STOPB);
      break;
    case SERIAL_1_AND_A_HALF_STOPBITS:
    case SERIAL_2_STOPBITS:
      outb (port, com_cfcr, cfcr | CFCR_STOPB);
      break;
    default:
      enable ();
      return 1;
    }
  enable ();
 
  return 0;
}
 
static int
dos_write (struct serial *scb, const char *str, int len)
{
  volatile struct dos_ttystate *port = &ports[scb->fd];
  int fifosize = port->fifo ? 16 : 1;
  long then;
  int cnt;
 
  while (len > 0)
    {
      /* send the data, fifosize bytes at a time */
      cnt = fifosize > len ? len : fifosize;
      port->txbusy = 1;
      /* Francisco Pastor <fpastor.etra-id@etra.es> says OUTSB messes
         up the communications with UARTs with FIFOs.  */
#ifdef UART_FIFO_WORKS
      outportsb (port->base + com_data, str, cnt);
      str += cnt;
      len -= cnt;
#else
      for ( ; cnt > 0; cnt--, len--)
        outportb (port->base + com_data, *str++);
#endif
#ifdef DOS_STATS
      cnts[CNT_TX] += cnt;
#endif
      /* wait for transmission to complete (max 1 sec) */
      then = rawclock () + RAWHZ;
      while (port->txbusy)
        {
          if ((rawclock () - then) >= 0)
            {
              errno = EIO;
              return SERIAL_ERROR;
            }
        }
    }
  return 0;
}
 
 
static int
dos_sendbreak (struct serial *scb)
{
  volatile struct dos_ttystate *port = &ports[scb->fd];
  unsigned char cfcr;
  long then;
 
  cfcr = inb (port, com_cfcr);
  outb (port, com_cfcr, cfcr | CFCR_SBREAK);
 
  /* 0.25 sec delay */
  then = rawclock () + RAWHZ / 4;
  while ((rawclock () - then) < 0)
    continue;
 
  outb (port, com_cfcr, cfcr);
  return 0;
}
 
 
static struct serial_ops dos_ops =
{
  "hardwire",
  0,
  dos_open,
  dos_close,
  dos_readchar,
  dos_write,
  dos_noop,                     /* flush output */
  dos_flush_input,
  dos_sendbreak,
  dos_raw,
  dos_get_tty_state,
  dos_set_tty_state,
  dos_print_tty_state,
  dos_noflush_set_tty_state,
  dos_setbaudrate,
  dos_setstopbits,
  dos_noop,                     /* wait for output to drain */
  (void (*)(struct serial *, int))NULL  /* change into async mode */
};
 
 
static void
dos_info (char *arg, int from_tty)
{
  struct dos_ttystate *port;
#ifdef DOS_STATS
  int i;
#endif
 
  for (port = ports; port < &ports[4]; port++)
    {
      if (port->baudrate == 0)
        continue;
      printf_filtered ("Port:\tCOM%ld (%sactive)\n", (long)(port - ports) + 1,
                       port->intrupt ? "" : "not ");
      printf_filtered ("Addr:\t0x%03x (irq %d)\n", port->base, port->irq);
      printf_filtered ("16550:\t%s\n", port->fifo ? "yes" : "no");
      printf_filtered ("Speed:\t%d baud\n", port->baudrate);
      printf_filtered ("Errs:\tframing %d parity %d overflow %d\n\n",
                       port->ferr, port->perr, port->oflo);
    }
 
#ifdef DOS_STATS
  printf_filtered ("\nTotal interrupts: %d\n", intrcnt);
  for (i = 0; i < NCNT; i++)
    if (cnts[i])
      printf_filtered ("%s:\t%d\n", cntnames[i], cnts[i]);
#endif
}
 
 
void
_initialize_ser_dos (void)
{
  serial_add_interface (&dos_ops);
 
  /* Save original interrupt mask register. */
  icu_oldmask = inportb (ICU_MASK);
 
  /* Mark fixed motherboard irqs as inuse. */
  intrupts[0].inuse =            /* timer tick */
    intrupts[1].inuse =         /* keyboard */
    intrupts[2].inuse = 1;      /* slave icu */
 
  add_setshow_zinteger_cmd ("com1base", class_obscure, &ports[0].base, _("\
Set COM1 base i/o port address."), _("\
Show COM1 base i/o port address."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_setshow_zinteger_cmd ("com1irq", class_obscure, &ports[0].irq, _("\
Set COM1 interrupt request."), _("\
Show COM1 interrupt request."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_setshow_zinteger_cmd ("com2base", class_obscure, &ports[1].base, _("\
Set COM2 base i/o port address."), _("\
Show COM2 base i/o port address."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_setshow_zinteger_cmd ("com2irq", class_obscure, &ports[1].irq, _("\
Set COM2 interrupt request."), _("\
Show COM2 interrupt request."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_setshow_zinteger_cmd ("com3base", class_obscure, &ports[2].base, _("\
Set COM3 base i/o port address."), _("\
Show COM3 base i/o port address."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_setshow_zinteger_cmd ("com3irq", class_obscure, &ports[2].irq, _("\
Set COM3 interrupt request."), _("\
Show COM3 interrupt request."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_setshow_zinteger_cmd ("com4base", class_obscure, &ports[3].base, _("\
Set COM4 base i/o port address."), _("\
Show COM4 base i/o port address."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_setshow_zinteger_cmd ("com4irq", class_obscure, &ports[3].irq, _("\
Set COM4 interrupt request."), _("\
Show COM4 interrupt request."), NULL,
                            NULL,
                            NULL, /* FIXME: i18n: */
                            &setlist, &showlist);
 
  add_info ("serial", dos_info,
            _("Print DOS serial port status."));
}
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[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [gdb/] [ser-go32.c] - Blame information for rev 841

Line No.	Rev	Author	Line
1	330	jeremybenn	`/* Remote serial interface for local (hardwired) serial ports for GO32.`
2			`Copyright (C) 1992, 1993, 2000, 2001, 2007, 2008, 2009, 2010`
3			`Free Software Foundation, Inc.`
4
5			`Contributed by Nigel Stephens, Algorithmics Ltd. (nigel@algor.co.uk).`
6
7			`This version uses DPMI interrupts to handle buffered i/o`
8			`without the separate "asynctsr" program.`
9
10			`This file is part of GDB.`
11
12			`This program is free software; you can redistribute it and/or modify`
13			`it under the terms of the GNU General Public License as published by`
14			`the Free Software Foundation; either version 3 of the License, or`
15			`(at your option) any later version.`
16
17			`This program is distributed in the hope that it will be useful,`
18			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
19			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
20			`GNU General Public License for more details.`
21
22			`You should have received a copy of the GNU General Public License`
23			`along with this program. If not, see <http://www.gnu.org/licenses/>. */`
24
25			`#include "defs.h"`
26			`#include "gdbcmd.h"`
27			`#include "serial.h"`
28			`#include "gdb_string.h"`
29
30
31			`/*`
32			`* NS16550 UART registers`
33			`*/`
34
35			`#define COM1ADDR 0x3f8`
36			`#define COM2ADDR 0x2f8`
37			`#define COM3ADDR 0x3e8`
38			`#define COM4ADDR 0x3e0`
39
40			`#define com_data 0 /* data register (R/W) */`