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