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 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 #elif defined(CONFIG_S3C2410) || defined(CONFIG_S3C2440) || \
  64       defined(CONFIG_S3C2442)
  65 #if defined(CONFIG_SERIAL1)
  66         return &s3c24xx_serial0_device;
  67 #elif defined(CONFIG_SERIAL2)
  68         return &s3c24xx_serial1_device;
  69 #elif defined(CONFIG_SERIAL3)
  70         return &s3c24xx_serial2_device;
  71 #else
  72 #error "CONFIG_SERIAL? missing."
  73 #endif
  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(CFG_NS16550_SERIAL)
 115 #if defined(CFG_NS16550_COM1)
 116         serial_register(&eserial1_device);
 117 #endif
 118 #if defined(CFG_NS16550_COM2)
 119         serial_register(&eserial2_device);
 120 #endif
 121 #if defined(CFG_NS16550_COM3)
 122         serial_register(&eserial3_device);
 123 #endif
 124 #if defined(CFG_NS16550_COM4)
 125         serial_register(&eserial4_device);
 126 #endif
 127 #endif /* CFG_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) || defined(CONFIG_S3C2440) || \
 138     defined(CONFIG_S3C2442)
 139         serial_register(&s3c24xx_serial0_device);
 140         serial_register(&s3c24xx_serial1_device);
 141         serial_register(&s3c24xx_serial2_device);
 142 #endif
 143         serial_assign (default_serial_console ()->name);
 144 }
 145
 146 void serial_devices_init (void)
 147 {
 148         device_t dev;
 149         struct serial_device *s = serial_devices;
 150
 151         while (s) {
 152                 memset (&dev, 0, sizeof (dev));
 153
 154                 strcpy (dev.name, s->name);
 155                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 156
 157                 dev.start = s->init;
 158                 dev.putc = s->putc;
 159                 dev.puts = s->puts;
 160                 dev.getc = s->getc;
 161                 dev.tstc = s->tstc;
 162
 163                 device_register (&dev);
 164
 165                 s = s->next;
 166         }
 167 }
 168
 169 int serial_assign (char *name)
 170 {
 171         struct serial_device *s;
 172
 173         for (s = serial_devices; s; s = s->next) {
 174                 if (strcmp (s->name, name) == 0) {
 175                         serial_current = s;
 176                         return 0;
 177                 }
 178         }
 179
 180         return 1;
 181 }
 182
 183 void serial_reinit_all (void)
 184 {
 185         struct serial_device *s;
 186
 187         for (s = serial_devices; s; s = s->next) {
 188                 s->init ();
 189         }
 190 }
 191
 192 int serial_init (void)
 193 {
 194         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 195                 struct serial_device *dev = default_serial_console ();
 196
 197                 return dev->init ();
 198         }
 199
 200         return serial_current->init ();
 201 }
 202
 203 void serial_setbrg (void)
 204 {
 205         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 206                 struct serial_device *dev = default_serial_console ();
 207
 208                 dev->setbrg ();
 209                 return;
 210         }
 211
 212         serial_current->setbrg ();
 213 }
 214
 215 int serial_getc (void)
 216 {
 217         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 218                 struct serial_device *dev = default_serial_console ();
 219
 220                 return dev->getc ();
 221         }
 222
 223         return serial_current->getc ();
 224 }
 225
 226 int serial_tstc (void)
 227 {
 228         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 229                 struct serial_device *dev = default_serial_console ();
 230
 231                 return dev->tstc ();
 232         }
 233
 234         return serial_current->tstc ();
 235 }
 236
 237 void serial_putc (const char c)
 238 {
 239         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 240                 struct serial_device *dev = default_serial_console ();
 241
 242                 dev->putc (c);
 243                 return;
 244         }
 245
 246         serial_current->putc (c);
 247 }
 248
 249 void serial_puts (const char *s)
 250 {
 251         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 252                 struct serial_device *dev = default_serial_console ();
 253
 254                 dev->puts (s);
 255                 return;
 256         }
 257
 258         serial_current->puts (s);
 259 }
 260
 261 #endif /* CONFIG_SERIAL_MULTI */