arch/mips/cobalt/console.c

   1 /*
   2  * (C) P. Horton 2006
   3  */
   4
   5 #include <linux/config.h>
   6 #include <linux/init.h>
   7 #include <linux/kernel.h>
   8 #include <linux/console.h>
   9 #include <linux/serial_reg.h>
  10 #include <asm/addrspace.h>
  11 #include <asm/mach-cobalt/cobalt.h>
  12
  13 static void putchar(int c)
  14 {
  15         if(c == '\n')
  16                 putchar('\r');
  17
  18         while(!(COBALT_UART[UART_LSR] & UART_LSR_THRE))
  19                 ;
  20
  21         COBALT_UART[UART_TX] = c;
  22 }
  23
  24 static void cons_write(struct console *c, const char *s, unsigned n)
  25 {
  26         while(n-- && *s)
  27                 putchar(*s++);
  28 }
  29
  30 static struct console cons_info =
  31 {
  32         .name   = "uart",
  33         .write  = cons_write,
  34         .flags  = CON_PRINTBUFFER | CON_BOOT,
  35         .index  = -1,
  36 };
  37
  38 void __init cobalt_early_console(void)
  39 {
  40         register_console(&cons_info);
  41
  42         printk("Cobalt: early console registered\n");
  43 }