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