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 static struct serial_device *serial_devices = NULL;
  31 static struct serial_device *serial_current = NULL;
  32
  33 #if !defined(CONFIG_LWMON) && !defined(CONFIG_PXA27X)
  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) || defined(CONFIG_405EZ) || defined(CONFIG_405EX) \
  43    || defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC83xx) \
  44    || defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
  45 #if defined(CONFIG_CONS_INDEX) && defined(CONFIG_SYS_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 #elif defined(CONFIG_S3C2410)
  63 #if defined(CONFIG_SERIAL1)
  64         return &s3c24xx_serial0_device;
  65 #elif defined(CONFIG_SERIAL2)
  66         return &s3c24xx_serial1_device;
  67 #elif defined(CONFIG_SERIAL3)
  68         return &s3c24xx_serial2_device;
  69 #else
  70 #error "CONFIG_SERIAL? missing."
  71 #endif
  72 #elif defined(CONFIG_OMAP3_ZOOM2)
  73                 return ZOOM2_DEFAULT_SERIAL_DEVICE;
  74 #else
  75 #error No default console
  76 #endif
  77 }
  78
  79 struct serial_device *default_serial_console(void) __attribute__((weak, alias("__default_serial_console")));
  80 #endif
  81
  82 int serial_register (struct serial_device *dev)
  83 {
  84         dev->init += gd->reloc_off;
  85         dev->setbrg += gd->reloc_off;
  86         dev->getc += gd->reloc_off;
  87         dev->tstc += gd->reloc_off;
  88         dev->putc += gd->reloc_off;
  89         dev->puts += gd->reloc_off;
  90
  91         dev->next = serial_devices;
  92         serial_devices = dev;
  93
  94         return 0;
  95 }
  96
  97 void serial_initialize (void)
  98 {
  99 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)
 100         serial_register (&serial_smc_device);
 101 #endif
 102 #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) \
 103  || defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
 104         serial_register (&serial_scc_device);
 105 #endif
 106
 107 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) \
 108  || defined(CONFIG_405EP) || defined(CONFIG_405EZ) || defined(CONFIG_405EX) \
 109  || defined(CONFIG_MPC5xxx)
 110         serial_register(&serial0_device);
 111         serial_register(&serial1_device);
 112 #endif
 113
 114 #if defined(CONFIG_SYS_NS16550_SERIAL)
 115 #if defined(CONFIG_SYS_NS16550_COM1)
 116         serial_register(&eserial1_device);
 117 #endif
 118 #if defined(CONFIG_SYS_NS16550_COM2)
 119         serial_register(&eserial2_device);
 120 #endif
 121 #if defined(CONFIG_SYS_NS16550_COM3)
 122         serial_register(&eserial3_device);
 123 #endif
 124 #if defined(CONFIG_SYS_NS16550_COM4)
 125         serial_register(&eserial4_device);
 126 #endif
 127 #endif /* CONFIG_SYS_NS16550_SERIAL */
 128 #if defined (CONFIG_FFUART)
 129         serial_register(&serial_ffuart_device);
 130 #endif
 131 #if defined (CONFIG_BTUART)
 132         serial_register(&serial_btuart_device);
 133 #endif
 134 #if defined (CONFIG_STUART)
 135         serial_register(&serial_stuart_device);
 136 #endif
 137 #if defined(CONFIG_S3C2410)
 138         serial_register(&s3c24xx_serial0_device);
 139         serial_register(&s3c24xx_serial1_device);
 140         serial_register(&s3c24xx_serial2_device);
 141 #endif
 142         serial_assign (default_serial_console ()->name);
 143 }
 144
 145 void serial_devices_init (void)
 146 {
 147         device_t dev;
 148         struct serial_device *s = serial_devices;
 149
 150         while (s) {
 151                 memset (&dev, 0, sizeof (dev));
 152
 153                 strcpy (dev.name, s->name);
 154                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 155
 156                 dev.start = s->init;
 157                 dev.putc = s->putc;
 158                 dev.puts = s->puts;
 159                 dev.getc = s->getc;
 160                 dev.tstc = s->tstc;
 161
 162                 device_register (&dev);
 163
 164                 s = s->next;
 165         }
 166 }
 167
 168 int serial_assign (char *name)
 169 {
 170         struct serial_device *s;
 171
 172         for (s = serial_devices; s; s = s->next) {
 173                 if (strcmp (s->name, name) == 0) {
 174                         serial_current = s;
 175                         return 0;
 176                 }
 177         }
 178
 179         return 1;
 180 }
 181
 182 void serial_reinit_all (void)
 183 {
 184         struct serial_device *s;
 185
 186         for (s = serial_devices; s; s = s->next) {
 187                 s->init ();
 188         }
 189 }
 190
 191 int serial_init (void)
 192 {
 193         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 194                 struct serial_device *dev = default_serial_console ();
 195
 196                 return dev->init ();
 197         }
 198
 199         return serial_current->init ();
 200 }
 201
 202 void serial_setbrg (void)
 203 {
 204         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 205                 struct serial_device *dev = default_serial_console ();
 206
 207                 dev->setbrg ();
 208                 return;
 209         }
 210
 211         serial_current->setbrg ();
 212 }
 213
 214 int serial_getc (void)
 215 {
 216         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 217                 struct serial_device *dev = default_serial_console ();
 218
 219                 return dev->getc ();
 220         }
 221
 222         return serial_current->getc ();
 223 }
 224
 225 int serial_tstc (void)
 226 {
 227         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 228                 struct serial_device *dev = default_serial_console ();
 229
 230                 return dev->tstc ();
 231         }
 232
 233         return serial_current->tstc ();
 234 }
 235
 236 void serial_putc (const char c)
 237 {
 238         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 239                 struct serial_device *dev = default_serial_console ();
 240
 241                 dev->putc (c);
 242                 return;
 243         }
 244
 245         serial_current->putc (c);
 246 }
 247
 248 void serial_puts (const char *s)
 249 {
 250         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 251                 struct serial_device *dev = default_serial_console ();
 252
 253                 dev->puts (s);
 254                 return;
 255         }
 256
 257         serial_current->puts (s);
 258 }