release/src-rt-6.x/linux/linux-2.6/drivers/char/decserial.c

   1 /*
   2  * sercons.c
   3  *      choose the right serial device at boot time
   4  *
   5  * triemer 6-SEP-1998
   6  *      sercons.c is designed to allow the three different kinds
   7  *      of serial devices under the decstation world to co-exist
   8  *      in the same kernel.  The idea here is to abstract
   9  *      the pieces of the drivers that are common to this file
  10  *      so that they do not clash at compile time and runtime.
  11  *
  12  * HK 16-SEP-1998 v0.002
  13  *      removed the PROM console as this is not a real serial
  14  *      device. Added support for PROM console in drivers/char/tty_io.c
  15  *      instead. Although it may work to enable more than one
  16  *      console device I strongly recommend to use only one.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <asm/dec/machtype.h>
  21
  22 #ifdef CONFIG_ZS
  23 extern int zs_init(void);
  24 #endif
  25
  26 #ifdef CONFIG_SERIAL_CONSOLE
  27
  28 #ifdef CONFIG_ZS
  29 extern void zs_serial_console_init(void);
  30 #endif
  31
  32 #endif
  33
  34 /* rs_init - starts up the serial interface -
  35    handle normal case of starting up the serial interface */
  36
  37 #ifdef CONFIG_SERIAL
  38
  39 int __init rs_init(void)
  40 {
  41 #ifdef CONFIG_ZS
  42     if (IOASIC)
  43         return zs_init();
  44 #endif
  45     return -ENXIO;
  46 }
  47
  48 __initcall(rs_init);
  49
  50 #endif
  51
  52 #ifdef CONFIG_SERIAL_CONSOLE
  53
  54 /* serial_console_init handles the special case of starting
  55  *   up the console on the serial port
  56  */
  57 static int __init decserial_console_init(void)
  58 {
  59 #ifdef CONFIG_ZS
  60     if (IOASIC)
  61         zs_serial_console_init();
  62 #endif
  63     return 0;
  64 }
  65 console_initcall(decserial_console_init);
  66
  67 #endif