src/console/console.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2003 Eric Biederman
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #include <console/console.h>
  21 #include <build.h>
  22 #include <arch/hlt.h>
  23 #include <arch/io.h>
  24
  25 #ifndef __PRE_RAM__
  26 #include <string.h>
  27
  28 /*
  29  * FIXME: get_option() needs to be abstracted better so that other non-volatile
  30  * storage can be used. This will benefit machines without CMOS as well as those
  31  * without a battery-backed CMOS (e.g. some laptops).
  32  */
  33 #if CONFIG_HAVE_CMOS_DEFAULT
  34 #include <pc80/mc146818rtc.h>
  35 #else
  36 static inline int get_option(void *dest, const char *name) { return -1; }
  37 #endif
  38
  39 /* initialize the console */
  40 void console_init(void)
  41 {
  42         struct console_driver *driver;
  43         if(get_option(&console_loglevel, "debug_level"))
  44                 console_loglevel=CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
  45
  46         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  47                 if (!driver->init)
  48                         continue;
  49                 driver->init();
  50         }
  51 }
  52
  53 void console_tx_flush(void)
  54 {
  55         struct console_driver *driver;
  56         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  57                 if (!driver->tx_flush)
  58                         continue;
  59                 driver->tx_flush();
  60         }
  61 }
  62
  63 static void __console_tx_byte(unsigned char byte)
  64 {
  65         struct console_driver *driver;
  66         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  67                 driver->tx_byte(byte);
  68         }
  69 }
  70
  71 void console_tx_byte(unsigned char byte)
  72 {
  73         if (byte == '\n')
  74                 __console_tx_byte('\r');
  75         __console_tx_byte(byte);
  76 }
  77
  78 unsigned char console_rx_byte(void)
  79 {
  80         struct console_driver *driver;
  81         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  82                 if (driver->tst_byte)
  83                         break;
  84         }
  85         if (driver == econsole_drivers)
  86                 return 0;
  87         while (!driver->tst_byte());
  88         return driver->rx_byte();
  89 }
  90
  91 int console_tst_byte(void)
  92 {
  93         struct console_driver *driver;
  94         for(driver = console_drivers; driver < econsole_drivers; driver++)
  95                 if (driver->tst_byte)
  96                         return driver->tst_byte();
  97         return 0;
  98 }
  99
 100 #else // __PRE_RAM__   ^^^ NOT defined   vvv defined
 101
 102 void console_init(void)
 103 {
 104 #if CONFIG_EARLY_CONSOLE
 105
 106 #if CONFIG_USBDEBUG
 107         enable_usbdebug(CONFIG_USBDEBUG_DEFAULT_PORT);
 108         early_usbdebug_init();
 109 #endif
 110 #if CONFIG_CONSOLE_SERIAL
 111         uart_init();
 112 #endif
 113 #if CONFIG_DRIVERS_OXFORD_OXPCIE && CONFIG_CONSOLE_SERIAL8250MEM
 114         oxford_init();
 115 #endif
 116 #if CONFIG_CONSOLE_NE2K
 117         ne2k_init(CONFIG_CONSOLE_NE2K_IO_PORT);
 118 #endif
 119 #if CONFIG_CONSOLE_CBMEM
 120         cbmemc_init();
 121 #endif
 122         static const char console_test[] =
 123                 "\n\ncoreboot-"
 124                 COREBOOT_VERSION
 125                 COREBOOT_EXTRA_VERSION
 126                 " "
 127                 COREBOOT_BUILD
 128                 " starting...\n";
 129         print_info(console_test);
 130
 131 #endif /* CONFIG_EARLY_CONSOLE */
 132 }
 133 #endif