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