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 #if defined(CONFIG_UART1_CONSOLE)
  44                 return &serial1_device;
  45 #else
  46                 return &serial0_device;
  47 #endif
  48 #else
  49 #error No default console
  50 #endif
  51 }
  52 #endif
  53
  54 static int serial_register (struct serial_device *dev)
  55 {
  56         DECLARE_GLOBAL_DATA_PTR;
  57
  58         dev->init += gd->reloc_off;
  59         dev->setbrg += gd->reloc_off;
  60         dev->getc += gd->reloc_off;
  61         dev->tstc += gd->reloc_off;
  62         dev->putc += gd->reloc_off;
  63         dev->puts += gd->reloc_off;
  64
  65         dev->next = serial_devices;
  66         serial_devices = dev;
  67
  68         return 0;
  69 }
  70
  71 void serial_initialize (void)
  72 {
  73 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
  74         serial_register (&serial_smc_device);
  75 #endif
  76 #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
  77  || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
  78         serial_register (&serial_scc_device);
  79 #endif
  80
  81 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
  82  || defined(CONFIG_405EP)
  83         serial_register(&serial0_device);
  84         serial_register(&serial1_device);
  85 #endif
  86
  87         serial_assign (default_serial_console ()->name);
  88 }
  89
  90 void serial_devices_init (void)
  91 {
  92         device_t dev;
  93         struct serial_device *s = serial_devices;
  94
  95         while (s) {
  96                 memset (&dev, 0, sizeof (dev));
  97
  98                 strcpy (dev.name, s->name);
  99                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 100
 101                 dev.start = s->init;
 102                 dev.putc = s->putc;
 103                 dev.puts = s->puts;
 104                 dev.getc = s->getc;
 105                 dev.tstc = s->tstc;
 106
 107                 device_register (&dev);
 108
 109                 s = s->next;
 110         }
 111 }
 112
 113 int serial_assign (char *name)
 114 {
 115         struct serial_device *s;
 116
 117         for (s = serial_devices; s; s = s->next) {
 118                 if (strcmp (s->name, name) == 0) {
 119                         serial_current = s;
 120                         return 0;
 121                 }
 122         }
 123
 124         return 1;
 125 }
 126
 127 void serial_reinit_all (void)
 128 {
 129         struct serial_device *s;
 130
 131         for (s = serial_devices; s; s = s->next) {
 132                 s->init ();
 133         }
 134 }
 135
 136 int serial_init (void)
 137 {
 138         DECLARE_GLOBAL_DATA_PTR;
 139
 140         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 141                 struct serial_device *dev = default_serial_console ();
 142
 143                 return dev->init ();
 144         }
 145
 146         return serial_current->init ();
 147 }
 148
 149 void serial_setbrg (void)
 150 {
 151         DECLARE_GLOBAL_DATA_PTR;
 152
 153         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 154                 struct serial_device *dev = default_serial_console ();
 155
 156                 dev->setbrg ();
 157                 return;
 158         }
 159
 160         serial_current->setbrg ();
 161 }
 162
 163 int serial_getc (void)
 164 {
 165         DECLARE_GLOBAL_DATA_PTR;
 166
 167         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 168                 struct serial_device *dev = default_serial_console ();
 169
 170                 return dev->getc ();
 171         }
 172
 173         return serial_current->getc ();
 174 }
 175
 176 int serial_tstc (void)
 177 {
 178         DECLARE_GLOBAL_DATA_PTR;
 179
 180         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 181                 struct serial_device *dev = default_serial_console ();
 182
 183                 return dev->tstc ();
 184         }
 185
 186         return serial_current->tstc ();
 187 }
 188
 189 void serial_putc (const char c)
 190 {
 191         DECLARE_GLOBAL_DATA_PTR;
 192
 193         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 194                 struct serial_device *dev = default_serial_console ();
 195
 196                 dev->putc (c);
 197                 return;
 198         }
 199
 200         serial_current->putc (c);
 201 }
 202
 203 void serial_puts (const char *s)
 204 {
 205         DECLARE_GLOBAL_DATA_PTR;
 206
 207         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 208                 struct serial_device *dev = default_serial_console ();
 209
 210                 dev->puts (s);
 211                 return;
 212         }
 213
 214         serial_current->puts (s);
 215 }
 216
 217 #endif /* CONFIG_SERIAL_MULTI */