arch/ia64/hp/sim/hpsim_console.c

   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
  28 static int simcons_init (struct console *, char *);
  29 static void simcons_write (struct console *, const char *, unsigned);
  30 static struct tty_driver *simcons_console_device (struct console *, int *);
  31
  32 static 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
  41 static int
  42 simcons_init (struct console *cons, char *options)
  43 {
  44         return 0;
  45 }
  46
  47 static void
  48 simcons_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
  60 static struct tty_driver *simcons_console_device (struct console *c, int *index)
  61 {
  62         *index = c->index;
  63         return hp_simserial_driver;
  64 }
  65
  66 int 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 }