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 #if !defined(CONFIG_LWMON) && !defined(CONFIG_PXA27X)
  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_405EX) \
  45    || defined(CONFIG_MPC5xxx)
  46 #if defined(CONFIG_CONS_INDEX) && defined(CFG_NS16550_SERIAL)
  47 #if (CONFIG_CONS_INDEX==1)
  48         return &eserial1_device;
  49 #elif (CONFIG_CONS_INDEX==2)
  50         return &eserial2_device;
  51 #elif (CONFIG_CONS_INDEX==3)
  52         return &eserial3_device;
  53 #elif (CONFIG_CONS_INDEX==4)
  54         return &eserial4_device;
  55 #else
  56 #error "Bad CONFIG_CONS_INDEX."
  57 #endif
  58 #elif defined(CONFIG_UART1_CONSOLE)
  59                 return &serial1_device;
  60 #else
  61                 return &serial0_device;
  62 #endif
  63 #else
  64 #error No default console
  65 #endif
  66 }
  67 #endif
  68
  69 int serial_register (struct serial_device *dev)
  70 {
  71         dev->init += gd->reloc_off;
  72         dev->setbrg += gd->reloc_off;
  73         dev->getc += gd->reloc_off;
  74         dev->tstc += gd->reloc_off;
  75         dev->putc += gd->reloc_off;
  76         dev->puts += gd->reloc_off;
  77
  78         dev->next = serial_devices;
  79         serial_devices = dev;
  80
  81         return 0;
  82 }
  83
  84 void serial_initialize (void)
  85 {
  86 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
  87         serial_register (&serial_smc_device);
  88 #endif
  89 #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
  90  || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
  91         serial_register (&serial_scc_device);
  92 #endif
  93
  94 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
  95  || defined(CONFIG_405EP) || defined(CONFIG_405EZ) || defined(CONFIG_405EX) \
  96  || defined(CONFIG_MPC5xxx)
  97         serial_register(&serial0_device);
  98         serial_register(&serial1_device);
  99 #endif
 100
 101 #if defined(CFG_NS16550_SERIAL)
 102 #if defined(CFG_NS16550_COM1)
 103         serial_register(&eserial1_device);
 104 #endif
 105 #if defined(CFG_NS16550_COM2)
 106         serial_register(&eserial2_device);
 107 #endif
 108 #if defined(CFG_NS16550_COM3)
 109         serial_register(&eserial3_device);
 110 #endif
 111 #if defined(CFG_NS16550_COM4)
 112         serial_register(&eserial4_device);
 113 #endif
 114 #endif /* CFG_NS16550_SERIAL */
 115 #if defined (CONFIG_FFUART)
 116         serial_register(&serial_ffuart_device);
 117 #endif
 118 #if defined (CONFIG_BTUART)
 119         serial_register(&serial_btuart_device);
 120 #endif
 121 #if defined (CONFIG_STUART)
 122         serial_register(&serial_stuart_device);
 123 #endif
 124         serial_assign (default_serial_console ()->name);
 125 }
 126
 127 void serial_devices_init (void)
 128 {
 129         device_t dev;
 130         struct serial_device *s = serial_devices;
 131
 132         while (s) {
 133                 memset (&dev, 0, sizeof (dev));
 134
 135                 strcpy (dev.name, s->name);
 136                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 137
 138                 dev.start = s->init;
 139                 dev.putc = s->putc;
 140                 dev.puts = s->puts;
 141                 dev.getc = s->getc;
 142                 dev.tstc = s->tstc;
 143
 144                 device_register (&dev);
 145
 146                 s = s->next;
 147         }
 148 }
 149
 150 int serial_assign (char *name)
 151 {
 152         struct serial_device *s;
 153
 154         for (s = serial_devices; s; s = s->next) {
 155                 if (strcmp (s->name, name) == 0) {
 156                         serial_current = s;
 157                         return 0;
 158                 }
 159         }
 160
 161         return 1;
 162 }
 163
 164 void serial_reinit_all (void)
 165 {
 166         struct serial_device *s;
 167
 168         for (s = serial_devices; s; s = s->next) {
 169                 s->init ();
 170         }
 171 }
 172
 173 int serial_init (void)
 174 {
 175         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 176                 struct serial_device *dev = default_serial_console ();
 177
 178                 return dev->init ();
 179         }
 180
 181         return serial_current->init ();
 182 }
 183
 184 void serial_setbrg (void)
 185 {
 186         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 187                 struct serial_device *dev = default_serial_console ();
 188
 189                 dev->setbrg ();
 190                 return;
 191         }
 192
 193         serial_current->setbrg ();
 194 }
 195
 196 int serial_getc (void)
 197 {
 198         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 199                 struct serial_device *dev = default_serial_console ();
 200
 201                 return dev->getc ();
 202         }
 203
 204         return serial_current->getc ();
 205 }
 206
 207 int serial_tstc (void)
 208 {
 209         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 210                 struct serial_device *dev = default_serial_console ();
 211
 212                 return dev->tstc ();
 213         }
 214
 215         return serial_current->tstc ();
 216 }
 217
 218 void serial_putc (const char c)
 219 {
 220         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 221                 struct serial_device *dev = default_serial_console ();
 222
 223                 dev->putc (c);
 224                 return;
 225         }
 226
 227         serial_current->putc (c);
 228 }
 229
 230 void serial_puts (const char *s)
 231 {
 232         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 233                 struct serial_device *dev = default_serial_console ();
 234
 235                 dev->puts (s);
 236                 return;
 237         }
 238
 239         serial_current->puts (s);
 240 }
 241
 242 #endif /* CONFIG_SERIAL_MULTI */