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) || defined(CONFIG_405EZ) || defined(CONFIG_MPC5xxx)
  45 #if defined(CONFIG_CONS_INDEX) && defined(CFG_NS16550_SERIAL)
  46 #if (CONFIG_CONS_INDEX==1)
  47         return &eserial1_device;
  48 #elif (CONFIG_CONS_INDEX==2)
  49         return &eserial2_device;
  50 #elif (CONFIG_CONS_INDEX==3)
  51         return &eserial3_device;
  52 #elif (CONFIG_CONS_INDEX==4)
  53         return &eserial4_device;
  54 #else
  55 #error "Bad CONFIG_CONS_INDEX."
  56 #endif
  57 #elif defined(CONFIG_UART1_CONSOLE)
  58                 return &serial1_device;
  59 #else
  60                 return &serial0_device;
  61 #endif
  62 #else
  63 #error No default console
  64 #endif
  65 }
  66 #endif
  67
  68 static int serial_register (struct serial_device *dev)
  69 {
  70         dev->init += gd->reloc_off;
  71         dev->setbrg += gd->reloc_off;
  72         dev->getc += gd->reloc_off;
  73         dev->tstc += gd->reloc_off;
  74         dev->putc += gd->reloc_off;
  75         dev->puts += gd->reloc_off;
  76
  77         dev->next = serial_devices;
  78         serial_devices = dev;
  79
  80         return 0;
  81 }
  82
  83 void serial_initialize (void)
  84 {
  85 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
  86         serial_register (&serial_smc_device);
  87 #endif
  88 #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
  89  || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
  90         serial_register (&serial_scc_device);
  91 #endif
  92
  93 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
  94  || defined(CONFIG_405EP) || defined(CONFIG_405EZ) || defined(CONFIG_MPC5xxx)
  95         serial_register(&serial0_device);
  96         serial_register(&serial1_device);
  97 #endif
  98
  99 #if defined(CFG_NS16550_SERIAL)
 100 #if defined(CFG_NS16550_COM1)
 101         serial_register(&eserial1_device);
 102 #endif
 103 #if defined(CFG_NS16550_COM2)
 104         serial_register(&eserial2_device);
 105 #endif
 106 #if defined(CFG_NS16550_COM3)
 107         serial_register(&eserial3_device);
 108 #endif
 109 #if defined(CFG_NS16550_COM4)
 110         serial_register(&eserial4_device);
 111 #endif
 112 #endif /* CFG_NS16550_SERIAL */
 113         serial_assign (default_serial_console ()->name);
 114 }
 115
 116 void serial_devices_init (void)
 117 {
 118         device_t dev;
 119         struct serial_device *s = serial_devices;
 120
 121         while (s) {
 122                 memset (&dev, 0, sizeof (dev));
 123
 124                 strcpy (dev.name, s->name);
 125                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 126
 127                 dev.start = s->init;
 128                 dev.putc = s->putc;
 129                 dev.puts = s->puts;
 130                 dev.getc = s->getc;
 131                 dev.tstc = s->tstc;
 132
 133                 device_register (&dev);
 134
 135                 s = s->next;
 136         }
 137 }
 138
 139 int serial_assign (char *name)
 140 {
 141         struct serial_device *s;
 142
 143         for (s = serial_devices; s; s = s->next) {
 144                 if (strcmp (s->name, name) == 0) {
 145                         serial_current = s;
 146                         return 0;
 147                 }
 148         }
 149
 150         return 1;
 151 }
 152
 153 void serial_reinit_all (void)
 154 {
 155         struct serial_device *s;
 156
 157         for (s = serial_devices; s; s = s->next) {
 158                 s->init ();
 159         }
 160 }
 161
 162 int serial_init (void)
 163 {
 164         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 165                 struct serial_device *dev = default_serial_console ();
 166
 167                 return dev->init ();
 168         }
 169
 170         return serial_current->init ();
 171 }
 172
 173 void serial_setbrg (void)
 174 {
 175         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 176                 struct serial_device *dev = default_serial_console ();
 177
 178                 dev->setbrg ();
 179                 return;
 180         }
 181
 182         serial_current->setbrg ();
 183 }
 184
 185 int serial_getc (void)
 186 {
 187         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 188                 struct serial_device *dev = default_serial_console ();
 189
 190                 return dev->getc ();
 191         }
 192
 193         return serial_current->getc ();
 194 }
 195
 196 int serial_tstc (void)
 197 {
 198         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 199                 struct serial_device *dev = default_serial_console ();
 200
 201                 return dev->tstc ();
 202         }
 203
 204         return serial_current->tstc ();
 205 }
 206
 207 void serial_putc (const char c)
 208 {
 209         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 210                 struct serial_device *dev = default_serial_console ();
 211
 212                 dev->putc (c);
 213                 return;
 214         }
 215
 216         serial_current->putc (c);
 217 }
 218
 219 void serial_puts (const char *s)
 220 {
 221         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 222                 struct serial_device *dev = default_serial_console ();
 223
 224                 dev->puts (s);
 225                 return;
 226         }
 227
 228         serial_current->puts (s);
 229 }
 230
 231 #endif /* CONFIG_SERIAL_MULTI */