arch/mips64/sgi-ip27/ip27-console.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  */
   6 #include <linux/init.h>
   7 #include <linux/console.h>
   8 #include <linux/kdev_t.h>
   9 #include <linux/major.h>
  10 #include <asm/sn/addrs.h>
  11 #include <asm/sn/sn0/hub.h>
  12 #include <asm/sn/klconfig.h>
  13 #include <asm/sn/ioc3.h>
  14 #include <asm/sgialib.h>
  15 #include <asm/sn/sn_private.h>
  16
  17 void prom_putchar(char c)
  18 {
  19         struct ioc3 *ioc3;
  20         struct ioc3_uartregs *uart;
  21
  22         ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base;
  23         uart = &ioc3->sregs.uarta;
  24
  25         while ((uart->iu_lsr & 0x20) == 0);
  26         uart->iu_thr = c;
  27 }
  28
  29 char __init prom_getchar(void)
  30 {
  31         return 0;
  32 }
  33
  34 static void
  35 ip27prom_console_write(struct console *con, const char *s, unsigned n)
  36 {
  37         prom_printf("%s", s);
  38 }
  39
  40 static kdev_t
  41 ip27prom_console_dev(struct console *c)
  42 {
  43         return MKDEV(TTY_MAJOR, 64 + c->index);
  44 }
  45
  46 static struct console ip27_prom_console = {
  47     name:       "prom",
  48     write:      ip27prom_console_write,
  49     device:     ip27prom_console_dev,
  50     flags:      CON_PRINTBUFFER,
  51     index:      -1,
  52 };
  53
  54 __init void ip27_setup_console(void)
  55 {
  56         register_console(&ip27_prom_console);
  57 }