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 #include <errno.h> 30 31 DECLARE_GLOBAL_DATA_PTR; 32 33 static struct serial_device *serial_devices; 34 static struct serial_device *serial_current; 35 36 static void serial_null(void) 37 { 38 } 39 40 #define serial_initfunc(name) \ 41 void name(void) \ 42 __attribute__((weak, alias("serial_null"))); 43 44 serial_initfunc(mpc8xx_serial_initialize); 45 serial_initfunc(ns16550_serial_initialize); 46 serial_initfunc(pxa_serial_initialize); 47 serial_initfunc(s3c24xx_serial_initialize); 48 serial_initfunc(s5p_serial_initialize); 49 serial_initfunc(zynq_serial_initalize); 50 serial_initfunc(bfin_serial_initialize); 51 serial_initfunc(bfin_jtag_initialize); 52 serial_initfunc(mpc512x_serial_initialize); 53 serial_initfunc(uartlite_serial_initialize); 54 serial_initfunc(au1x00_serial_initialize); 55 serial_initfunc(asc_serial_initialize); 56 serial_initfunc(jz_serial_initialize); 57 serial_initfunc(mpc5xx_serial_initialize); 58 serial_initfunc(mpc8220_serial_initialize); 59 serial_initfunc(mpc8260_scc_serial_initialize); 60 serial_initfunc(mpc8260_smc_serial_initialize); 61 serial_initfunc(mpc85xx_serial_initialize); 62 serial_initfunc(iop480_serial_initialize); 63 serial_initfunc(leon2_serial_initialize); 64 serial_initfunc(leon3_serial_initialize); 65 serial_initfunc(marvell_serial_initialize); 66 serial_initfunc(amirix_serial_initialize); 67 serial_initfunc(bmw_serial_initialize); 68 serial_initfunc(cogent_serial_initialize); 69 serial_initfunc(cpci750_serial_initialize); 70 serial_initfunc(evb64260_serial_initialize); 71 serial_initfunc(ml2_serial_initialize); 72 serial_initfunc(sconsole_serial_initialize); 73 serial_initfunc(p3mx_serial_initialize); 74 serial_initfunc(altera_jtag_serial_initialize); 75 serial_initfunc(altera_serial_initialize); 76 serial_initfunc(atmel_serial_initialize); 77 serial_initfunc(lpc32xx_serial_initialize); 78 serial_initfunc(mcf_serial_initialize); 79 serial_initfunc(ns9750_serial_initialize); 80 serial_initfunc(oc_serial_initialize); 81 serial_initfunc(s3c4510b_serial_initialize); 82 serial_initfunc(s3c64xx_serial_initialize); 83 serial_initfunc(sandbox_serial_initialize); 84 serial_initfunc(clps7111_serial_initialize); 85 serial_initfunc(imx_serial_initialize); 86 serial_initfunc(ixp_serial_initialize); 87 serial_initfunc(ks8695_serial_initialize); 88 serial_initfunc(lh7a40x_serial_initialize); 89 serial_initfunc(lpc2292_serial_initialize); 90 serial_initfunc(max3100_serial_initialize); 91 serial_initfunc(mxc_serial_initialize); 92 serial_initfunc(netarm_serial_initialize); 93 serial_initfunc(pl01x_serial_initialize); 94 serial_initfunc(s3c44b0_serial_initialize); 95 serial_initfunc(sa1100_serial_initialize); 96 serial_initfunc(sh_serial_initialize); 97 98 void serial_register(struct serial_device *dev) 99 { 100 #ifdef CONFIG_NEEDS_MANUAL_RELOC 101 if (dev->start) 102 dev->start += gd->reloc_off; 103 if (dev->stop) 104 dev->stop += gd->reloc_off; 105 if (dev->setbrg) 106 dev->setbrg += gd->reloc_off; 107 if (dev->getc) 108 dev->getc += gd->reloc_off; 109 if (dev->tstc) 110 dev->tstc += gd->reloc_off; 111 if (dev->putc) 112 dev->putc += gd->reloc_off; 113 if (dev->puts) 114 dev->puts += gd->reloc_off; 115 #endif 116 117 dev->next = serial_devices; 118 serial_devices = dev; 119 } 120 121 void serial_initialize(void) 122 { 123 mpc8xx_serial_initialize(); 124 ns16550_serial_initialize(); 125 pxa_serial_initialize(); 126 s3c24xx_serial_initialize(); 127 s5p_serial_initialize(); 128 mpc512x_serial_initialize(); 129 bfin_serial_initialize(); 130 bfin_jtag_initialize(); 131 uartlite_serial_initialize(); 132 zynq_serial_initalize(); 133 au1x00_serial_initialize(); 134 asc_serial_initialize(); 135 jz_serial_initialize(); 136 mpc5xx_serial_initialize(); 137 mpc8220_serial_initialize(); 138 mpc8260_scc_serial_initialize(); 139 mpc8260_smc_serial_initialize(); 140 mpc85xx_serial_initialize(); 141 iop480_serial_initialize(); 142 leon2_serial_initialize(); 143 leon3_serial_initialize(); 144 marvell_serial_initialize(); 145 amirix_serial_initialize(); 146 bmw_serial_initialize(); 147 cogent_serial_initialize(); 148 cpci750_serial_initialize(); 149 evb64260_serial_initialize(); 150 ml2_serial_initialize(); 151 sconsole_serial_initialize(); 152 p3mx_serial_initialize(); 153 altera_jtag_serial_initialize(); 154 altera_serial_initialize(); 155 atmel_serial_initialize(); 156 lpc32xx_serial_initialize(); 157 mcf_serial_initialize(); 158 ns9750_serial_initialize(); 159 oc_serial_initialize(); 160 s3c4510b_serial_initialize(); 161 s3c64xx_serial_initialize(); 162 sandbox_serial_initialize(); 163 clps7111_serial_initialize(); 164 imx_serial_initialize(); 165 ixp_serial_initialize(); 166 ks8695_serial_initialize(); 167 lh7a40x_serial_initialize(); 168 lpc2292_serial_initialize(); 169 max3100_serial_initialize(); 170 mxc_serial_initialize(); 171 netarm_serial_initialize(); 172 pl01x_serial_initialize(); 173 s3c44b0_serial_initialize(); 174 sa1100_serial_initialize(); 175 sh_serial_initialize(); 176 177 serial_assign(default_serial_console()->name); 178 } 179 180 void serial_stdio_init(void) 181 { 182 struct stdio_dev dev; 183 struct serial_device *s = serial_devices; 184 185 while (s) { 186 memset(&dev, 0, sizeof(dev)); 187 188 strcpy(dev.name, s->name); 189 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT; 190 191 dev.start = s->start; 192 dev.stop = s->stop; 193 dev.putc = s->putc; 194 dev.puts = s->puts; 195 dev.getc = s->getc; 196 dev.tstc = s->tstc; 197 198 stdio_register(&dev); 199 200 s = s->next; 201 } 202 } 203 204 int serial_assign(const char *name) 205 { 206 struct serial_device *s; 207 208 for (s = serial_devices; s; s = s->next) { 209 if (strcmp(s->name, name)) 210 continue; 211 serial_current = s; 212 return 0; 213 } 214 215 return -EINVAL; 216 } 217 218 void serial_reinit_all(void) 219 { 220 struct serial_device *s; 221 222 for (s = serial_devices; s; s = s->next) 223 s->start(); 224 } 225 226 static struct serial_device *get_current(void) 227 { 228 struct serial_device *dev; 229 230 if (!(gd->flags & GD_FLG_RELOC) || !serial_current) { 231 dev = default_serial_console(); 232 233 /* We must have a console device */ 234 if (!dev) { 235 #ifdef CONFIG_SPL_BUILD 236 puts("Cannot find console\n"); 237 hang(); 238 #else 239 panic("Cannot find console\n"); 240 #endif 241 } 242 } else 243 dev = serial_current; 244 return dev; 245 } 246 247 int serial_init(void) 248 { 249 return get_current()->start(); 250 } 251 252 void serial_setbrg(void) 253 { 254 get_current()->setbrg(); 255 } 256 257 int serial_getc(void) 258 { 259 return get_current()->getc(); 260 } 261 262 int serial_tstc(void) 263 { 264 return get_current()->tstc(); 265 } 266 267 void serial_putc(const char c) 268 { 269 get_current()->putc(c); 270 } 271 272 void serial_puts(const char *s) 273 { 274 get_current()->puts(s); 275 } 276 277 void default_serial_puts(const char *s) 278 { 279 struct serial_device *dev = get_current(); 280 while (*s) 281 dev->putc(*s++); 282 } 283 284 #if CONFIG_POST & CONFIG_SYS_POST_UART 285 static const int bauds[] = CONFIG_SYS_BAUDRATE_TABLE; 286 287 /* Mark weak until post/cpu/.../uart.c migrate over */ 288 __weak 289 int uart_post_test(int flags) 290 { 291 unsigned char c; 292 int ret, saved_baud, b; 293 struct serial_device *saved_dev, *s; 294 bd_t *bd = gd->bd; 295 296 /* Save current serial state */ 297 ret = 0; 298 saved_dev = serial_current; 299 saved_baud = bd->bi_baudrate; 300 301 for (s = serial_devices; s; s = s->next) { 302 /* If this driver doesn't support loop back, skip it */ 303 if (!s->loop) 304 continue; 305 306 /* Test the next device */ 307 serial_current = s; 308 309 ret = serial_init(); 310 if (ret) 311 goto done; 312 313 /* Consume anything that happens to be queued */ 314 while (serial_tstc()) 315 serial_getc(); 316 317 /* Enable loop back */ 318 s->loop(1); 319 320 /* Test every available baud rate */ 321 for (b = 0; b < ARRAY_SIZE(bauds); ++b) { 322 bd->bi_baudrate = bauds[b]; 323 serial_setbrg(); 324 325 /* 326 * Stick to printable chars to avoid issues: 327 * - terminal corruption 328 * - serial program reacting to sequences and sending 329 * back random extra data 330 * - most serial drivers add in extra chars (like \r\n) 331 */ 332 for (c = 0x20; c < 0x7f; ++c) { 333 /* Send it out */ 334 serial_putc(c); 335 336 /* Make sure it's the same one */ 337 ret = (c != serial_getc()); 338 if (ret) { 339 s->loop(0); 340 goto done; 341 } 342 343 /* Clean up the output in case it was sent */ 344 serial_putc('\b'); 345 ret = ('\b' != serial_getc()); 346 if (ret) { 347 s->loop(0); 348 goto done; 349 } 350 } 351 } 352 353 /* Disable loop back */ 354 s->loop(0); 355 356 /* XXX: There is no serial_stop() !? */ 357 if (s->stop) 358 s->stop(); 359 } 360 361 done: 362 /* Restore previous serial state */ 363 serial_current = saved_dev; 364 bd->bi_baudrate = saved_baud; 365 serial_reinit_all(); 366 serial_setbrg(); 367 368 return ret; 369 } 370 #endif 371