1 /* 2 * (C) Copyright 2000 3 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com. 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 <linux/compiler.h> 26 27 #include <ns16550.h> 28 #ifdef CONFIG_NS87308 29 #include <ns87308.h> 30 #endif 31 #ifdef CONFIG_KIRKWOOD 32 #include <asm/arch/kirkwood.h> 33 #elif defined(CONFIG_ORION5X) 34 #include <asm/arch/orion5x.h> 35 #elif defined(CONFIG_ARMADA100) 36 #include <asm/arch/armada100.h> 37 #elif defined(CONFIG_PANTHEON) 38 #include <asm/arch/pantheon.h> 39 #endif 40 41 #if defined (CONFIG_SERIAL_MULTI) 42 #include <serial.h> 43 #endif 44 45 DECLARE_GLOBAL_DATA_PTR; 46 47 #if !defined(CONFIG_CONS_INDEX) 48 #if defined (CONFIG_SERIAL_MULTI) 49 /* with CONFIG_SERIAL_MULTI we might have no console 50 * on these devices 51 */ 52 #else 53 #error "No console index specified." 54 #endif /* CONFIG_SERIAL_MULTI */ 55 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4) 56 #error "Invalid console index value." 57 #endif 58 59 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) 60 #error "Console port 1 defined but not configured." 61 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) 62 #error "Console port 2 defined but not configured." 63 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) 64 #error "Console port 3 defined but not configured." 65 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) 66 #error "Console port 4 defined but not configured." 67 #endif 68 69 /* Note: The port number specified in the functions is 1 based. 70 * the array is 0 based. 71 */ 72 static NS16550_t serial_ports[4] = { 73 #ifdef CONFIG_SYS_NS16550_COM1 74 (NS16550_t)CONFIG_SYS_NS16550_COM1, 75 #else 76 NULL, 77 #endif 78 #ifdef CONFIG_SYS_NS16550_COM2 79 (NS16550_t)CONFIG_SYS_NS16550_COM2, 80 #else 81 NULL, 82 #endif 83 #ifdef CONFIG_SYS_NS16550_COM3 84 (NS16550_t)CONFIG_SYS_NS16550_COM3, 85 #else 86 NULL, 87 #endif 88 #ifdef CONFIG_SYS_NS16550_COM4 89 (NS16550_t)CONFIG_SYS_NS16550_COM4 90 #else 91 NULL 92 #endif 93 }; 94 95 #define PORT serial_ports[port-1] 96 #if defined(CONFIG_CONS_INDEX) 97 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1]) 98 #endif 99 100 #if defined(CONFIG_SERIAL_MULTI) 101 102 /* Multi serial device functions */ 103 #define DECLARE_ESERIAL_FUNCTIONS(port) \ 104 int eserial##port##_init (void) {\ 105 int clock_divisor; \ 106 clock_divisor = calc_divisor(serial_ports[port-1]); \ 107 NS16550_init(serial_ports[port-1], clock_divisor); \ 108 return(0);}\ 109 void eserial##port##_setbrg (void) {\ 110 serial_setbrg_dev(port);}\ 111 int eserial##port##_getc (void) {\ 112 return serial_getc_dev(port);}\ 113 int eserial##port##_tstc (void) {\ 114 return serial_tstc_dev(port);}\ 115 void eserial##port##_putc (const char c) {\ 116 serial_putc_dev(port, c);}\ 117 void eserial##port##_puts (const char *s) {\ 118 serial_puts_dev(port, s);} 119 120 /* Serial device descriptor */ 121 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\ 122 name,\ 123 bus,\ 124 eserial##port##_init,\ 125 NULL,\ 126 eserial##port##_setbrg,\ 127 eserial##port##_getc,\ 128 eserial##port##_tstc,\ 129 eserial##port##_putc,\ 130 eserial##port##_puts, } 131 132 #endif /* CONFIG_SERIAL_MULTI */ 133 134 static int calc_divisor (NS16550_t port) 135 { 136 #ifdef CONFIG_OMAP1510 137 /* If can't cleanly clock 115200 set div to 1 */ 138 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 139 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 140 return (1); /* return 1 for base divisor */ 141 } 142 port->osc_12m_sel = 0; /* clear if previsouly set */ 143 #endif 144 #ifdef CONFIG_OMAP1610 145 /* If can't cleanly clock 115200 set div to 1 */ 146 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 147 return (26); /* return 26 for base divisor */ 148 } 149 #endif 150 151 #ifdef CONFIG_APTIX 152 #define MODE_X_DIV 13 153 #else 154 #define MODE_X_DIV 16 155 #endif 156 157 /* Compute divisor value. Normally, we should simply return: 158 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 159 * but we need to round that value by adding 0.5. 160 * Rounding is especially important at high baud rates. 161 */ 162 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 163 (MODE_X_DIV * gd->baudrate); 164 } 165 166 #if !defined(CONFIG_SERIAL_MULTI) 167 int serial_init (void) 168 { 169 int clock_divisor; 170 171 #ifdef CONFIG_NS87308 172 initialise_ns87308(); 173 #endif 174 175 #ifdef CONFIG_SYS_NS16550_COM1 176 clock_divisor = calc_divisor(serial_ports[0]); 177 NS16550_init(serial_ports[0], clock_divisor); 178 #endif 179 #ifdef CONFIG_SYS_NS16550_COM2 180 clock_divisor = calc_divisor(serial_ports[1]); 181 NS16550_init(serial_ports[1], clock_divisor); 182 #endif 183 #ifdef CONFIG_SYS_NS16550_COM3 184 clock_divisor = calc_divisor(serial_ports[2]); 185 NS16550_init(serial_ports[2], clock_divisor); 186 #endif 187 #ifdef CONFIG_SYS_NS16550_COM4 188 clock_divisor = calc_divisor(serial_ports[3]); 189 NS16550_init(serial_ports[3], clock_divisor); 190 #endif 191 192 return (0); 193 } 194 #endif 195 196 void 197 _serial_putc(const char c,const int port) 198 { 199 if (c == '\n') 200 NS16550_putc(PORT, '\r'); 201 202 NS16550_putc(PORT, c); 203 } 204 205 void 206 _serial_putc_raw(const char c,const int port) 207 { 208 NS16550_putc(PORT, c); 209 } 210 211 void 212 _serial_puts (const char *s,const int port) 213 { 214 while (*s) { 215 _serial_putc (*s++,port); 216 } 217 } 218 219 220 int 221 _serial_getc(const int port) 222 { 223 return NS16550_getc(PORT); 224 } 225 226 int 227 _serial_tstc(const int port) 228 { 229 return NS16550_tstc(PORT); 230 } 231 232 void 233 _serial_setbrg (const int port) 234 { 235 int clock_divisor; 236 237 clock_divisor = calc_divisor(PORT); 238 NS16550_reinit(PORT, clock_divisor); 239 } 240 241 #if defined(CONFIG_SERIAL_MULTI) 242 static inline void 243 serial_putc_dev(unsigned int dev_index,const char c) 244 { 245 _serial_putc(c,dev_index); 246 } 247 #else 248 void 249 serial_putc(const char c) 250 { 251 _serial_putc(c,CONFIG_CONS_INDEX); 252 } 253 #endif 254 255 #if defined(CONFIG_SERIAL_MULTI) 256 static inline void 257 serial_putc_raw_dev(unsigned int dev_index,const char c) 258 { 259 _serial_putc_raw(c,dev_index); 260 } 261 #else 262 void 263 serial_putc_raw(const char c) 264 { 265 _serial_putc_raw(c,CONFIG_CONS_INDEX); 266 } 267 #endif 268 269 #if defined(CONFIG_SERIAL_MULTI) 270 static inline void 271 serial_puts_dev(unsigned int dev_index,const char *s) 272 { 273 _serial_puts(s,dev_index); 274 } 275 #else 276 void 277 serial_puts(const char *s) 278 { 279 _serial_puts(s,CONFIG_CONS_INDEX); 280 } 281 #endif 282 283 #if defined(CONFIG_SERIAL_MULTI) 284 static inline int 285 serial_getc_dev(unsigned int dev_index) 286 { 287 return _serial_getc(dev_index); 288 } 289 #else 290 int 291 serial_getc(void) 292 { 293 return _serial_getc(CONFIG_CONS_INDEX); 294 } 295 #endif 296 297 #if defined(CONFIG_SERIAL_MULTI) 298 static inline int 299 serial_tstc_dev(unsigned int dev_index) 300 { 301 return _serial_tstc(dev_index); 302 } 303 #else 304 int 305 serial_tstc(void) 306 { 307 return _serial_tstc(CONFIG_CONS_INDEX); 308 } 309 #endif 310 311 #if defined(CONFIG_SERIAL_MULTI) 312 static inline void 313 serial_setbrg_dev(unsigned int dev_index) 314 { 315 _serial_setbrg(dev_index); 316 } 317 #else 318 void 319 serial_setbrg(void) 320 { 321 _serial_setbrg(CONFIG_CONS_INDEX); 322 } 323 #endif 324 325 #if defined(CONFIG_SERIAL_MULTI) 326 327 DECLARE_ESERIAL_FUNCTIONS(1); 328 struct serial_device eserial1_device = 329 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); 330 DECLARE_ESERIAL_FUNCTIONS(2); 331 struct serial_device eserial2_device = 332 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); 333 DECLARE_ESERIAL_FUNCTIONS(3); 334 struct serial_device eserial3_device = 335 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); 336 DECLARE_ESERIAL_FUNCTIONS(4); 337 struct serial_device eserial4_device = 338 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); 339 340 __weak struct serial_device *default_serial_console(void) 341 { 342 #if CONFIG_CONS_INDEX == 1 343 return &eserial1_device; 344 #elif CONFIG_CONS_INDEX == 2 345 return &eserial2_device; 346 #elif CONFIG_CONS_INDEX == 3 347 return &eserial3_device; 348 #elif CONFIG_CONS_INDEX == 4 349 return &eserial4_device; 350 #else 351 #error "Bad CONFIG_CONS_INDEX." 352 #endif 353 } 354 355 #endif /* CONFIG_SERIAL_MULTI */ 356