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hpsim_console.c

/*
 * Platform dependent support for HP simulator.
 *
 * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
 *    David Mosberger-Tang <davidm@hpl.hp.com>
 * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/tty.h>
#include <linux/kdev_t.h>
#include <linux/console.h>

#include <asm/delay.h>
#include <asm/irq.h>
#include <asm/pal.h>
#include <asm/machvec.h>
#include <asm/pgtable.h>
#include <asm/sal.h>
#include <asm/hpsim.h>

#include "hpsim_ssc.h"

static int simcons_init (struct console *, char *);
static void simcons_write (struct console *, const char *, unsigned);
static struct tty_driver *simcons_console_device (struct console *, int *);

static struct console hpsim_cons = {
      .name =           "simcons",
      .write =    simcons_write,
      .device =   simcons_console_device,
      .setup =    simcons_init,
      .flags =    CON_PRINTBUFFER,
      .index =    -1,
};

static int
simcons_init (struct console *cons, char *options)
{
      return 0;
}

static void
simcons_write (struct console *cons, const char *buf, unsigned count)
{
      unsigned long ch;

      while (count-- > 0) {
            ch = *buf++;
            ia64_ssc(ch, 0, 0, 0, SSC_PUTCHAR);
            if (ch == '\n')
              ia64_ssc('\r', 0, 0, 0, SSC_PUTCHAR);
      }
}

static struct tty_driver *simcons_console_device (struct console *c, int *index)
{
      *index = c->index;
      return hp_simserial_driver;
}

int simcons_register(void)
{
      if (!ia64_platform_is("hpsim"))
            return 1;

      if (hpsim_cons.flags & CON_ENABLED)
            return 1;

      register_console(&hpsim_cons);
      return 0;
}

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