release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/sibyte/common/cfe_console.c

   1 #include <linux/init.h>
   2 #include <linux/errno.h>
   3 #include <linux/console.h>
   4
   5 #include <asm/sibyte/board.h>
   6
   7 #include <asm/fw/cfe/cfe_api.h>
   8 #include <asm/fw/cfe/cfe_error.h>
   9
  10 extern int cfe_cons_handle;
  11
  12 static void cfe_console_write(struct console *cons, const char *str,
  13                        unsigned int count)
  14 {
  15         int i, last, written;
  16
  17         for (i=0, last=0; i<count; i++) {
  18                 if (!str[i])
  19                         /* XXXKW can/should this ever happen? */
  20                         return;
  21                 if (str[i] == '\n') {
  22                         do {
  23                                 written = cfe_write(cfe_cons_handle, &str[last], i-last);
  24                                 if (written < 0)
  25                                         ;
  26                                 last += written;
  27                         } while (last < i);
  28                         while (cfe_write(cfe_cons_handle, "\r", 1) <= 0)
  29                                 ;
  30                 }
  31         }
  32         if (last != count) {
  33                 do {
  34                         written = cfe_write(cfe_cons_handle, &str[last], count-last);
  35                         if (written < 0)
  36                                 ;
  37                         last += written;
  38                 } while (last < count);
  39         }
  40
  41 }
  42
  43 static int cfe_console_setup(struct console *cons, char *str)
  44 {
  45         char consdev[32];
  46         /* XXXKW think about interaction with 'console=' cmdline arg */
  47         /* If none of the console options are configured, the build will break. */
  48         if (cfe_getenv("BOOT_CONSOLE", consdev, 32) >= 0) {
  49 #ifdef CONFIG_SERIAL_SB1250_DUART
  50                 if (!strcmp(consdev, "uart0")) {
  51                         setleds("u0cn");
  52                 } else if (!strcmp(consdev, "uart1")) {
  53                         setleds("u1cn");
  54                 } else
  55 #endif
  56 #ifdef CONFIG_VGA_CONSOLE
  57                        if (!strcmp(consdev, "pcconsole0")) {
  58                                 setleds("pccn");
  59                 } else
  60 #endif
  61                         return -ENODEV;
  62         }
  63         return 0;
  64 }
  65
  66 static struct console sb1250_cfe_cons = {
  67         .name           = "cfe",
  68         .write          = cfe_console_write,
  69         .setup          = cfe_console_setup,
  70         .flags          = CON_PRINTBUFFER,
  71         .index          = -1,
  72 };
  73
  74 static int __init sb1250_cfe_console_init(void)
  75 {
  76         register_console(&sb1250_cfe_cons);
  77         return 0;
  78 }
  79
  80 console_initcall(sb1250_cfe_console_init);