LXR linux/arch/ia64/hp/sim/hpsim

   1/*
   2 * Platform dependent support for HP simulator.
   3 *
   4 * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
   5 *      David Mosberger-Tang <davidm@hpl.hp.com>
   6 * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
   7 */
   8
   9#include <linux/init.h>
  10#include <linux/kernel.h>
  11#include <linux/param.h>
  12#include <linux/string.h>
  13#include <linux/types.h>
  14#include <linux/tty.h>
  15#include <linux/kdev_t.h>
  16#include <linux/console.h>
  17
  18#include <asm/delay.h>
  19#include <asm/irq.h>
  20#include <asm/pal.h>
  21#include <asm/machvec.h>
  22#include <asm/pgtable.h>
  23#include <asm/sal.h>
  24#include <asm/hpsim.h>
  25
  26#include "hpsim_ssc.h"
  27
  28static int simcons_init (struct console *, char *);
  29static void simcons_write (struct console *, const char *, unsigned);
  30static struct tty_driver *simcons_console_device (struct console *, int *);
  31
  32static struct console hpsim_cons = {
  33        .name =         "simcons",
  34        .write =        simcons_write,
  35        .device =       simcons_console_device,
  36        .setup =        simcons_init,
  37        .flags =        CON_PRINTBUFFER,
  38        .index =        -1,
  39};
  40
  41static int
  42simcons_init (struct console *cons, char *options)
  43{
  44        return 0;
  45}
  46
  47static void
  48simcons_write (struct console *cons, const char *buf, unsigned count)
  49{
  50        unsigned long ch;
  51
  52        while (count-- > 0) {
  53                ch = *buf++;
  54                ia64_ssc(ch, 0, 0, 0, SSC_PUTCHAR);
  55                if (ch == '\n')
  56                  ia64_ssc('\r', 0, 0, 0, SSC_PUTCHAR);
  57        }
  58}
  59
  60static struct tty_driver *simcons_console_device (struct console *c, int *index)
  61{
  62        *index = c->index;
  63        return hp_simserial_driver;
  64}
  65
  66int simcons_register(void)
  67{
  68        if (!ia64_platform_is("hpsim"))
  69                return 1;
  70
  71        if (hpsim_cons.flags & CON_ENABLED)
  72                return 1;
  73
  74        register_console(&hpsim_cons);
  75        return 0;
  76}
  77