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 <stdio_dev.h>
  27 #include <post.h>
  28 #include <linux/compiler.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 static struct serial_device *serial_devices;
  33 static struct serial_device *serial_current;
  34
  35 static void serial_null(void)
  36 {
  37 }
  38
  39 #define serial_initfunc(name)                                   \
  40         void name(void)                                         \
  41                 __attribute__((weak, alias("serial_null")));
  42
  43 serial_initfunc(mpc8xx_serial_initialize);
  44 serial_initfunc(ns16550_serial_initialize);
  45 serial_initfunc(pxa_serial_initialize);
  46 serial_initfunc(s3c24xx_serial_initialize);
  47 serial_initfunc(s5p_serial_initialize);
  48 serial_initfunc(zynq_serial_initalize);
  49 serial_initfunc(bfin_serial_initialize);
  50 serial_initfunc(bfin_jtag_initialize);
  51 serial_initfunc(mpc512x_serial_initialize);
  52 serial_initfunc(uartlite_serial_initialize);
  53 serial_initfunc(au1x00_serial_initialize);
  54 serial_initfunc(asc_serial_initialize);
  55 serial_initfunc(jz_serial_initialize);
  56 serial_initfunc(mpc5xx_serial_initialize);
  57 serial_initfunc(mpc8220_serial_initialize);
  58 serial_initfunc(mpc8260_scc_serial_initialize);
  59 serial_initfunc(mpc8260_smc_serial_initialize);
  60 serial_initfunc(mpc85xx_serial_initialize);
  61 serial_initfunc(iop480_serial_initialize);
  62 serial_initfunc(leon2_serial_initialize);
  63 serial_initfunc(leon3_serial_initialize);
  64 serial_initfunc(marvell_serial_initialize);
  65 serial_initfunc(amirix_serial_initialize);
  66 serial_initfunc(bmw_serial_initialize);
  67 serial_initfunc(cogent_serial_initialize);
  68 serial_initfunc(cpci750_serial_initialize);
  69 serial_initfunc(evb64260_serial_initialize);
  70 serial_initfunc(ml2_serial_initialize);
  71 serial_initfunc(sconsole_serial_initialize);
  72 serial_initfunc(p3mx_serial_initialize);
  73 serial_initfunc(altera_jtag_serial_initialize);
  74 serial_initfunc(altera_serial_initialize);
  75 serial_initfunc(atmel_serial_initialize);
  76 serial_initfunc(lpc32xx_serial_initialize);
  77 serial_initfunc(mcf_serial_initialize);
  78 serial_initfunc(ns9750_serial_initialize);
  79 serial_initfunc(oc_serial_initialize);
  80 serial_initfunc(s3c4510b_serial_initialize);
  81 serial_initfunc(s3c64xx_serial_initialize);
  82 serial_initfunc(sandbox_serial_initialize);
  83 serial_initfunc(clps7111_serial_initialize);
  84 serial_initfunc(imx_serial_initialize);
  85 serial_initfunc(ixp_serial_initialize);
  86 serial_initfunc(ks8695_serial_initialize);
  87 serial_initfunc(lh7a40x_serial_initialize);
  88 serial_initfunc(lpc2292_serial_initialize);
  89 serial_initfunc(max3100_serial_initialize);
  90 serial_initfunc(mxc_serial_initialize);
  91 serial_initfunc(netarm_serial_initialize);
  92 serial_initfunc(pl01x_serial_initialize);
  93 serial_initfunc(s3c44b0_serial_initialize);
  94 serial_initfunc(sa1100_serial_initialize);
  95
  96 void serial_register(struct serial_device *dev)
  97 {
  98 #ifdef CONFIG_NEEDS_MANUAL_RELOC
  99         dev->start += gd->reloc_off;
 100         dev->setbrg += gd->reloc_off;
 101         dev->getc += gd->reloc_off;
 102         dev->tstc += gd->reloc_off;
 103         dev->putc += gd->reloc_off;
 104         dev->puts += gd->reloc_off;
 105 #endif
 106
 107         dev->next = serial_devices;
 108         serial_devices = dev;
 109 }
 110
 111 void serial_initialize(void)
 112 {
 113         mpc8xx_serial_initialize();
 114         ns16550_serial_initialize();
 115         pxa_serial_initialize();
 116         s3c24xx_serial_initialize();
 117         s5p_serial_initialize();
 118         mpc512x_serial_initialize();
 119         bfin_serial_initialize();
 120         bfin_jtag_initialize();
 121         uartlite_serial_initialize();
 122         zynq_serial_initalize();
 123         au1x00_serial_initialize();
 124         asc_serial_initialize();
 125         jz_serial_initialize();
 126         mpc5xx_serial_initialize();
 127         mpc8220_serial_initialize();
 128         mpc8260_scc_serial_initialize();
 129         mpc8260_smc_serial_initialize();
 130         mpc85xx_serial_initialize();
 131         iop480_serial_initialize();
 132         leon2_serial_initialize();
 133         leon3_serial_initialize();
 134         marvell_serial_initialize();
 135         amirix_serial_initialize();
 136         bmw_serial_initialize();
 137         cogent_serial_initialize();
 138         cpci750_serial_initialize();
 139         evb64260_serial_initialize();
 140         ml2_serial_initialize();
 141         sconsole_serial_initialize();
 142         p3mx_serial_initialize();
 143         altera_jtag_serial_initialize();
 144         altera_serial_initialize();
 145         atmel_serial_initialize();
 146         lpc32xx_serial_initialize();
 147         mcf_serial_initialize();
 148         ns9750_serial_initialize();
 149         oc_serial_initialize();
 150         s3c4510b_serial_initialize();
 151         s3c64xx_serial_initialize();
 152         sandbox_serial_initialize();
 153         clps7111_serial_initialize();
 154         imx_serial_initialize();
 155         ixp_serial_initialize();
 156         ks8695_serial_initialize();
 157         lh7a40x_serial_initialize();
 158         lpc2292_serial_initialize();
 159         max3100_serial_initialize();
 160         mxc_serial_initialize();
 161         netarm_serial_initialize();
 162         pl01x_serial_initialize();
 163         s3c44b0_serial_initialize();
 164         sa1100_serial_initialize();
 165
 166         serial_assign(default_serial_console()->name);
 167 }
 168
 169 void serial_stdio_init(void)
 170 {
 171         struct stdio_dev dev;
 172         struct serial_device *s = serial_devices;
 173
 174         while (s) {
 175                 memset(&dev, 0, sizeof(dev));
 176
 177                 strcpy(dev.name, s->name);
 178                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 179
 180                 dev.start = s->start;
 181                 dev.stop = s->stop;
 182                 dev.putc = s->putc;
 183                 dev.puts = s->puts;
 184                 dev.getc = s->getc;
 185                 dev.tstc = s->tstc;
 186
 187                 stdio_register(&dev);
 188
 189                 s = s->next;
 190         }
 191 }
 192
 193 int serial_assign(const char *name)
 194 {
 195         struct serial_device *s;
 196
 197         for (s = serial_devices; s; s = s->next) {
 198                 if (strcmp(s->name, name) == 0) {
 199                         serial_current = s;
 200                         return 0;
 201                 }
 202         }
 203
 204         return 1;
 205 }
 206
 207 void serial_reinit_all(void)
 208 {
 209         struct serial_device *s;
 210
 211         for (s = serial_devices; s; s = s->next)
 212                 s->start();
 213 }
 214
 215 static struct serial_device *get_current(void)
 216 {
 217         struct serial_device *dev;
 218
 219         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 220                 dev = default_serial_console();
 221
 222                 /* We must have a console device */
 223                 if (!dev)
 224                         panic("Cannot find console");
 225         } else
 226                 dev = serial_current;
 227         return dev;
 228 }
 229
 230 int serial_init(void)
 231 {
 232         return get_current()->start();
 233 }
 234
 235 void serial_setbrg(void)
 236 {
 237         get_current()->setbrg();
 238 }
 239
 240 int serial_getc(void)
 241 {
 242         return get_current()->getc();
 243 }
 244
 245 int serial_tstc(void)
 246 {
 247         return get_current()->tstc();
 248 }
 249
 250 void serial_putc(const char c)
 251 {
 252         get_current()->putc(c);
 253 }
 254
 255 void serial_puts(const char *s)
 256 {
 257         get_current()->puts(s);
 258 }
 259
 260 #if CONFIG_POST & CONFIG_SYS_POST_UART
 261 static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
 262
 263 /* Mark weak until post/cpu/.../uart.c migrate over */
 264 __weak
 265 int uart_post_test(int flags)
 266 {
 267         unsigned char c;
 268         int ret, saved_baud, b;
 269         struct serial_device *saved_dev, *s;
 270         bd_t *bd = gd->bd;
 271
 272         /* Save current serial state */
 273         ret = 0;
 274         saved_dev = serial_current;
 275         saved_baud = bd->bi_baudrate;
 276
 277         for (s = serial_devices; s; s = s->next) {
 278                 /* If this driver doesn't support loop back, skip it */
 279                 if (!s->loop)
 280                         continue;
 281
 282                 /* Test the next device */
 283                 serial_current = s;
 284
 285                 ret = serial_init();
 286                 if (ret)
 287                         goto done;
 288
 289                 /* Consume anything that happens to be queued */
 290                 while (serial_tstc())
 291                         serial_getc();
 292
 293                 /* Enable loop back */
 294                 s->loop(1);
 295
 296                 /* Test every available baud rate */
 297                 for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
 298                         bd->bi_baudrate = bauds[b];
 299                         serial_setbrg();
 300
 301                         /*
 302                          * Stick to printable chars to avoid issues:
 303                          *  - terminal corruption
 304                          *  - serial program reacting to sequences and sending
 305                          *    back random extra data
 306                          *  - most serial drivers add in extra chars (like \r\n)
 307                          */
 308                         for (c = 0x20; c < 0x7f; ++c) {
 309                                 /* Send it out */
 310                                 serial_putc(c);
 311
 312                                 /* Make sure it's the same one */
 313                                 ret = (c != serial_getc());
 314                                 if (ret) {
 315                                         s->loop(0);
 316                                         goto done;
 317                                 }
 318
 319                                 /* Clean up the output in case it was sent */
 320                                 serial_putc('\b');
 321                                 ret = ('\b' != serial_getc());
 322                                 if (ret) {
 323                                         s->loop(0);
 324                                         goto done;
 325                                 }
 326                         }
 327                 }
 328
 329                 /* Disable loop back */
 330                 s->loop(0);
 331
 332                 /* XXX: There is no serial_stop() !? */
 333                 if (s->stop)
 334                         s->stop();
 335         }
 336
 337  done:
 338         /* Restore previous serial state */
 339         serial_current = saved_dev;
 340         bd->bi_baudrate = saved_baud;
 341         serial_reinit_all();
 342         serial_setbrg();
 343
 344         return ret;
 345 }
 346 #endif