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/config.h>
  20 #include <linux/init.h>
  21 #include <asm/dec/machtype.h>
  22
  23 #ifdef CONFIG_ZS
  24 extern int zs_init(void);
  25 #endif
  26
  27 #ifdef CONFIG_DZ
  28 extern int dz_init(void);
  29 #endif
  30
  31 #ifdef CONFIG_SERIAL_CONSOLE
  32
  33 #ifdef CONFIG_ZS
  34 extern void zs_serial_console_init(void);
  35 #endif
  36
  37 #ifdef CONFIG_DZ
  38 extern void dz_serial_console_init(void);
  39 #endif
  40
  41 #endif
  42
  43 /* rs_init - starts up the serial interface -
  44    handle normal case of starting up the serial interface */
  45
  46 #ifdef CONFIG_SERIAL
  47
  48 int __init rs_init(void)
  49 {
  50
  51 #if defined(CONFIG_ZS) && defined(CONFIG_DZ)
  52     if (IOASIC)
  53         return zs_init();
  54     else
  55         return dz_init();
  56 #else
  57
  58 #ifdef CONFIG_ZS
  59     return zs_init();
  60 #endif
  61
  62 #ifdef CONFIG_DZ
  63     return dz_init();
  64 #endif
  65
  66 #endif
  67 }
  68
  69 __initcall(rs_init);
  70
  71 #endif
  72
  73 #ifdef CONFIG_SERIAL_CONSOLE
  74
  75 /* serial_console_init handles the special case of starting
  76  *   up the console on the serial port
  77  */
  78 static int __init decserial_console_init(void)
  79 {
  80 #if defined(CONFIG_ZS) && defined(CONFIG_DZ)
  81     if (IOASIC)
  82         zs_serial_console_init();
  83     else
  84         dz_serial_console_init();
  85 #else
  86
  87 #ifdef CONFIG_ZS
  88     zs_serial_console_init();
  89 #endif
  90
  91 #ifdef CONFIG_DZ
  92     dz_serial_console_init();
  93 #endif
  94
  95 #endif
  96     return 0;
  97 }
  98 console_initcall(decserial_console_init);
  99
 100 #endif