git.sur5r.net Git - u-boot/blob - 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
  91 void serial_register(struct serial_device *dev)
  92 {
  93 #ifdef CONFIG_NEEDS_MANUAL_RELOC
  94         dev->start += gd->reloc_off;
  95         dev->setbrg += gd->reloc_off;
  96         dev->getc += gd->reloc_off;
  97         dev->tstc += gd->reloc_off;
  98         dev->putc += gd->reloc_off;
  99         dev->puts += gd->reloc_off;
 100 #endif
 101
 102         dev->next = serial_devices;
 103         serial_devices = dev;
 104 }
 105
 106 void serial_initialize(void)
 107 {
 108         mpc8xx_serial_initialize();
 109         ns16550_serial_initialize();
 110         pxa_serial_initialize();
 111         s3c24xx_serial_initialize();
 112         s5p_serial_initialize();
 113         mpc512x_serial_initialize();
 114         bfin_serial_initialize();
 115         bfin_jtag_initialize();
 116         uartlite_serial_initialize();
 117         zynq_serial_initalize();
 118         au1x00_serial_initialize();
 119         asc_serial_initialize();
 120         jz_serial_initialize();
 121         mpc5xx_serial_initialize();
 122         mpc8220_serial_initialize();
 123         mpc8260_scc_serial_initialize();
 124         mpc8260_smc_serial_initialize();
 125         mpc85xx_serial_initialize();
 126         iop480_serial_initialize();
 127         leon2_serial_initialize();
 128         leon3_serial_initialize();
 129         marvell_serial_initialize();
 130         amirix_serial_initialize();
 131         bmw_serial_initialize();
 132         cogent_serial_initialize();
 133         cpci750_serial_initialize();
 134         evb64260_serial_initialize();
 135         ml2_serial_initialize();
 136         sconsole_serial_initialize();
 137         p3mx_serial_initialize();
 138         altera_jtag_serial_initialize();
 139         altera_serial_initialize();
 140         atmel_serial_initialize();
 141         lpc32xx_serial_initialize();
 142         mcf_serial_initialize();
 143         ns9750_serial_initialize();
 144         oc_serial_initialize();
 145         s3c4510b_serial_initialize();
 146         s3c64xx_serial_initialize();
 147         sandbox_serial_initialize();
 148         clps7111_serial_initialize();
 149         imx_serial_initialize();
 150         ixp_serial_initialize();
 151         ks8695_serial_initialize();
 152         lh7a40x_serial_initialize();
 153         lpc2292_serial_initialize();
 154         max3100_serial_initialize();
 155
 156         serial_assign(default_serial_console()->name);
 157 }
 158
 159 void serial_stdio_init(void)
 160 {
 161         struct stdio_dev dev;
 162         struct serial_device *s = serial_devices;
 163
 164         while (s) {
 165                 memset(&dev, 0, sizeof(dev));
 166
 167                 strcpy(dev.name, s->name);
 168                 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
 169
 170                 dev.start = s->start;
 171                 dev.stop = s->stop;
 172                 dev.putc = s->putc;
 173                 dev.puts = s->puts;
 174                 dev.getc = s->getc;
 175                 dev.tstc = s->tstc;
 176
 177                 stdio_register(&dev);
 178
 179                 s = s->next;
 180         }
 181 }
 182
 183 int serial_assign(const char *name)
 184 {
 185         struct serial_device *s;
 186
 187         for (s = serial_devices; s; s = s->next) {
 188                 if (strcmp(s->name, name) == 0) {
 189                         serial_current = s;
 190                         return 0;
 191                 }
 192         }
 193
 194         return 1;
 195 }
 196
 197 void serial_reinit_all(void)
 198 {
 199         struct serial_device *s;
 200
 201         for (s = serial_devices; s; s = s->next)
 202                 s->start();
 203 }
 204
 205 static struct serial_device *get_current(void)
 206 {
 207         struct serial_device *dev;
 208
 209         if (!(gd->flags & GD_FLG_RELOC) || !serial_current) {
 210                 dev = default_serial_console();
 211
 212                 /* We must have a console device */
 213                 if (!dev)
 214                         panic("Cannot find console");
 215         } else
 216                 dev = serial_current;
 217         return dev;
 218 }
 219
 220 int serial_init(void)
 221 {
 222         return get_current()->start();
 223 }
 224
 225 void serial_setbrg(void)
 226 {
 227         get_current()->setbrg();
 228 }
 229
 230 int serial_getc(void)
 231 {
 232         return get_current()->getc();
 233 }
 234
 235 int serial_tstc(void)
 236 {
 237         return get_current()->tstc();
 238 }
 239
 240 void serial_putc(const char c)
 241 {
 242         get_current()->putc(c);
 243 }
 244
 245 void serial_puts(const char *s)
 246 {
 247         get_current()->puts(s);
 248 }
 249
 250 #if CONFIG_POST & CONFIG_SYS_POST_UART
 251 static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE;
 252
 253 /* Mark weak until post/cpu/.../uart.c migrate over */
 254 __weak
 255 int uart_post_test(int flags)
 256 {
 257         unsigned char c;
 258         int ret, saved_baud, b;
 259         struct serial_device *saved_dev, *s;
 260         bd_t *bd = gd->bd;
 261
 262         /* Save current serial state */
 263         ret = 0;
 264         saved_dev = serial_current;
 265         saved_baud = bd->bi_baudrate;
 266
 267         for (s = serial_devices; s; s = s->next) {
 268                 /* If this driver doesn't support loop back, skip it */
 269                 if (!s->loop)
 270                         continue;
 271
 272                 /* Test the next device */
 273                 serial_current = s;
 274
 275                 ret = serial_init();
 276                 if (ret)
 277                         goto done;
 278
 279                 /* Consume anything that happens to be queued */
 280                 while (serial_tstc())
 281                         serial_getc();
 282
 283                 /* Enable loop back */
 284                 s->loop(1);
 285
 286                 /* Test every available baud rate */
 287                 for (b = 0; b < ARRAY_SIZE(bauds); ++b) {
 288                         bd->bi_baudrate = bauds[b];
 289                         serial_setbrg();
 290
 291                         /*
 292                          * Stick to printable chars to avoid issues:
 293                          *  - terminal corruption
 294                          *  - serial program reacting to sequences and sending
 295                          *    back random extra data
 296                          *  - most serial drivers add in extra chars (like \r\n)
 297                          */
 298                         for (c = 0x20; c < 0x7f; ++c) {
 299                                 /* Send it out */
 300                                 serial_putc(c);
 301
 302                                 /* Make sure it's the same one */
 303                                 ret = (c != serial_getc());
 304                                 if (ret) {
 305                                         s->loop(0);
 306                                         goto done;
 307                                 }
 308
 309                                 /* Clean up the output in case it was sent */
 310                                 serial_putc('\b');
 311                                 ret = ('\b' != serial_getc());
 312                                 if (ret) {
 313                                         s->loop(0);
 314                                         goto done;
 315                                 }
 316                         }
 317                 }
 318
 319                 /* Disable loop back */
 320                 s->loop(0);
 321
 322                 /* XXX: There is no serial_stop() !? */
 323                 if (s->stop)
 324                         s->stop();
 325         }
 326
 327  done:
 328         /* Restore previous serial state */
 329         serial_current = saved_dev;
 330         bd->bi_baudrate = saved_baud;
 331         serial_reinit_all();
 332         serial_setbrg();
 333
 334         return ret;
 335 }
 336 #endif