common/serial.c

   1 /*
   2  * (C) Copyright 2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <serial.h>
  26 #include <devices.h>
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 #if defined(CONFIG_SERIAL_MULTI)
  31
  32 static struct serial_device *serial_devices = NULL;
  33 static struct serial_device *serial_current = NULL;
  34
  35 #ifndef CONFIG_LWMON
  36 struct serial_device *default_serial_console (void)
  37 {
  38 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
  39         return &serial_smc_device;
  40 #elif defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
  41    || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
  42         return &serial_scc_device;
  43 #elif defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
  44    || defined(CONFIG_405EP)
  45         return &serial0_device;
  46 #else
  47 #error No default console
  48 #endif
  49 }
  50 #endif
  51
  52 static int serial_register (struct serial_device *dev)
  53 {
  54         dev->init += gd->reloc_off;
  55         dev->setbrg += gd->reloc_off;
  56         dev->getc += gd->reloc_off;
  57         dev->tstc += gd->reloc_off;
  58         dev->putc += gd->reloc_off;
  59         dev->puts += gd->reloc_off;
  60
  61         dev->next = serial_devices;
  62         serial_devices = dev;
  63
  64         return 0;
  65 }
  66
  67 void serial_initialize (void)
  68 {
  69 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
  70         serial_register (&serial_smc_device);
  71 #endif
  72 #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
  73  || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
  74         serial_register (&serial_scc_device);
  75 #endif
  76
  77 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
  78  || defined(CONFIG_405EP)
  79         serial_register(&serial0_device);
  80         serial_register(&serial1_device);
  81 #endif
  82
  83         serial_assign (default_serial_console ()->name);
  84 }
  85
  86 void serial_devices_init (void)
  87 {
  88         device_t dev;
  89         struct serial_device *s = serial_devices;
  90
  91         while (s) {
  92                 memset (&dev, 0, sizeof (dev));
  93
  94                 strcpy (dev.name, s->name);
  95                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
  96
  97                 dev.start = s->init;
  98                 dev.putc = s->putc;
  99                 dev.puts = s->puts;
 100                 dev.getc = s->getc;
 101                 dev.tstc = s->tstc;
 102
 103                 device_register (&dev);
 104
 105                 s = s->next;
 106         }
 107 }
 108
 109 int serial_assign (char *name)
 110 {
 111         struct serial_device *s;
 112
 113         for (s = serial_devices; s; s = s->next) {
 114                 if (strcmp (s->name, name) == 0) {
 115                         serial_current = s;
 116                         return 0;
 117                 }
 118         }
 119
 120         return 1;
 121 }
 122
 123 void serial_reinit_all (void)
 124 {
 125         struct serial_device *s;
 126
 127         for (s = serial_devices; s; s = s->next) {
 128                 s->init ();
 129         }
 130 }
 131
 132 int serial_init (void)
 133 {
 134         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 135                 struct serial_device *dev = default_serial_console ();
 136
 137                 return dev->init ();
 138         }
 139
 140         return serial_current->init ();
 141 }
 142
 143 void serial_setbrg (void)
 144 {
 145         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 146                 struct serial_device *dev = default_serial_console ();
 147
 148                 dev->setbrg ();
 149                 return;
 150         }
 151
 152         serial_current->setbrg ();
 153 }
 154
 155 int serial_getc (void)
 156 {
 157         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 158                 struct serial_device *dev = default_serial_console ();
 159
 160                 return dev->getc ();
 161         }
 162
 163         return serial_current->getc ();
 164 }
 165
 166 int serial_tstc (void)
 167 {
 168         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 169                 struct serial_device *dev = default_serial_console ();
 170
 171                 return dev->tstc ();
 172         }
 173
 174         return serial_current->tstc ();
 175 }
 176
 177 void serial_putc (const char c)
 178 {
 179         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 180                 struct serial_device *dev = default_serial_console ();
 181
 182                 dev->putc (c);
 183                 return;
 184         }
 185
 186         serial_current->putc (c);
 187 }
 188
 189 void serial_puts (const char *s)
 190 {
 191         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 192                 struct serial_device *dev = default_serial_console ();
 193
 194                 dev->puts (s);
 195                 return;
 196         }
 197
 198         serial_current->puts (s);
 199 }
 200
 201 #endif /* CONFIG_SERIAL_MULTI */