release/src-rt-6.x/linux/linux-2.6/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
  25 #include "hpsim_ssc.h"
  26
  27 static int simcons_init (struct console *, char *);
  28 static void simcons_write (struct console *, const char *, unsigned);
  29 static struct tty_driver *simcons_console_device (struct console *, int *);
  30
  31 struct console hpsim_cons = {
  32         .name =         "simcons",
  33         .write =        simcons_write,
  34         .device =       simcons_console_device,
  35         .setup =        simcons_init,
  36         .flags =        CON_PRINTBUFFER,
  37         .index =        -1,
  38 };
  39
  40 static int
  41 simcons_init (struct console *cons, char *options)
  42 {
  43         return 0;
  44 }
  45
  46 static void
  47 simcons_write (struct console *cons, const char *buf, unsigned count)
  48 {
  49         unsigned long ch;
  50
  51         while (count-- > 0) {
  52                 ch = *buf++;
  53                 ia64_ssc(ch, 0, 0, 0, SSC_PUTCHAR);
  54                 if (ch == '\n')
  55                   ia64_ssc('\r', 0, 0, 0, SSC_PUTCHAR);
  56         }
  57 }
  58
  59 static struct tty_driver *simcons_console_device (struct console *c, int *index)
  60 {
  61         extern struct tty_driver *hp_simserial_driver;
  62         *index = c->index;
  63         return hp_simserial_driver;
  64 }