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 #if defined(CONFIG_SERIAL_MULTI)
  29
  30 static struct serial_device *serial_devices = NULL;
  31 static struct serial_device *serial_current = NULL;
  32
  33 #ifndef CONFIG_LWMON
  34 struct serial_device *default_serial_console (void)
  35 {
  36 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
  37         return &serial_smc_device;
  38 #elif defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
  39    || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
  40         return &serial_scc_device;
  41 #elif defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
  42    || defined(CONFIG_405EP)
  43         return &serial0_device;
  44 #else
  45 #error No default console
  46 #endif
  47 }
  48 #endif
  49
  50 static int serial_register (struct serial_device *dev)
  51 {
  52         DECLARE_GLOBAL_DATA_PTR;
  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         DECLARE_GLOBAL_DATA_PTR;
 135
 136         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 137                 struct serial_device *dev = default_serial_console ();
 138
 139                 return dev->init ();
 140         }
 141
 142         return serial_current->init ();
 143 }
 144
 145 void serial_setbrg (void)
 146 {
 147         DECLARE_GLOBAL_DATA_PTR;
 148
 149         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 150                 struct serial_device *dev = default_serial_console ();
 151
 152                 dev->setbrg ();
 153                 return;
 154         }
 155
 156         serial_current->setbrg ();
 157 }
 158
 159 int serial_getc (void)
 160 {
 161         DECLARE_GLOBAL_DATA_PTR;
 162
 163         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 164                 struct serial_device *dev = default_serial_console ();
 165
 166                 return dev->getc ();
 167         }
 168
 169         return serial_current->getc ();
 170 }
 171
 172 int serial_tstc (void)
 173 {
 174         DECLARE_GLOBAL_DATA_PTR;
 175
 176         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 177                 struct serial_device *dev = default_serial_console ();
 178
 179                 return dev->tstc ();
 180         }
 181
 182         return serial_current->tstc ();
 183 }
 184
 185 void serial_putc (const char c)
 186 {
 187         DECLARE_GLOBAL_DATA_PTR;
 188
 189         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 190                 struct serial_device *dev = default_serial_console ();
 191
 192                 dev->putc (c);
 193                 return;
 194         }
 195
 196         serial_current->putc (c);
 197 }
 198
 199 void serial_puts (const char *s)
 200 {
 201         DECLARE_GLOBAL_DATA_PTR;
 202
 203         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 204                 struct serial_device *dev = default_serial_console ();
 205
 206                 dev->puts (s);
 207                 return;
 208         }
 209
 210         serial_current->puts (s);
 211 }
 212
 213 #endif /* CONFIG_SERIAL_MULTI */