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) {\ 122 name,\ 123 eserial##port##_init,\ 124 NULL,\ 125 eserial##port##_setbrg,\ 126 eserial##port##_getc,\ 127 eserial##port##_tstc,\ 128 eserial##port##_putc,\ 129 eserial##port##_puts, } 130 131 #endif /* CONFIG_SERIAL_MULTI */ 132 133 static int calc_divisor (NS16550_t port) 134 { 135 #ifdef CONFIG_OMAP1510 136 /* If can't cleanly clock 115200 set div to 1 */ 137 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 138 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 139 return (1); /* return 1 for base divisor */ 140 } 141 port->osc_12m_sel = 0; /* clear if previsouly set */ 142 #endif 143 #ifdef CONFIG_OMAP1610 144 /* If can't cleanly clock 115200 set div to 1 */ 145 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 146 return (26); /* return 26 for base divisor */ 147 } 148 #endif 149 150 #ifdef CONFIG_APTIX 151 #define MODE_X_DIV 13 152 #else 153 #define MODE_X_DIV 16 154 #endif 155 156 /* Compute divisor value. Normally, we should simply return: 157 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 158 * but we need to round that value by adding 0.5. 159 * Rounding is especially important at high baud rates. 160 */ 161 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 162 (MODE_X_DIV * gd->baudrate); 163 } 164 165 #if !defined(CONFIG_SERIAL_MULTI) 166 int serial_init (void) 167 { 168 int clock_divisor; 169 170 #ifdef CONFIG_NS87308 171 initialise_ns87308(); 172 #endif 173 174 #ifdef CONFIG_SYS_NS16550_COM1 175 clock_divisor = calc_divisor(serial_ports[0]); 176 NS16550_init(serial_ports[0], clock_divisor); 177 #endif 178 #ifdef CONFIG_SYS_NS16550_COM2 179 clock_divisor = calc_divisor(serial_ports[1]); 180 NS16550_init(serial_ports[1], clock_divisor); 181 #endif 182 #ifdef CONFIG_SYS_NS16550_COM3 183 clock_divisor = calc_divisor(serial_ports[2]); 184 NS16550_init(serial_ports[2], clock_divisor); 185 #endif 186 #ifdef CONFIG_SYS_NS16550_COM4 187 clock_divisor = calc_divisor(serial_ports[3]); 188 NS16550_init(serial_ports[3], clock_divisor); 189 #endif 190 191 return (0); 192 } 193 #endif 194 195 void 196 _serial_putc(const char c,const int port) 197 { 198 if (c == '\n') 199 NS16550_putc(PORT, '\r'); 200 201 NS16550_putc(PORT, c); 202 } 203 204 void 205 _serial_putc_raw(const char c,const int port) 206 { 207 NS16550_putc(PORT, c); 208 } 209 210 void 211 _serial_puts (const char *s,const int port) 212 { 213 while (*s) { 214 _serial_putc (*s++,port); 215 } 216 } 217 218 219 int 220 _serial_getc(const int port) 221 { 222 return NS16550_getc(PORT); 223 } 224 225 int 226 _serial_tstc(const int port) 227 { 228 return NS16550_tstc(PORT); 229 } 230 231 void 232 _serial_setbrg (const int port) 233 { 234 int clock_divisor; 235 236 clock_divisor = calc_divisor(PORT); 237 NS16550_reinit(PORT, clock_divisor); 238 } 239 240 #if defined(CONFIG_SERIAL_MULTI) 241 static inline void 242 serial_putc_dev(unsigned int dev_index,const char c) 243 { 244 _serial_putc(c,dev_index); 245 } 246 #else 247 void 248 serial_putc(const char c) 249 { 250 _serial_putc(c,CONFIG_CONS_INDEX); 251 } 252 #endif 253 254 #if defined(CONFIG_SERIAL_MULTI) 255 static inline void 256 serial_putc_raw_dev(unsigned int dev_index,const char c) 257 { 258 _serial_putc_raw(c,dev_index); 259 } 260 #else 261 void 262 serial_putc_raw(const char c) 263 { 264 _serial_putc_raw(c,CONFIG_CONS_INDEX); 265 } 266 #endif 267 268 #if defined(CONFIG_SERIAL_MULTI) 269 static inline void 270 serial_puts_dev(unsigned int dev_index,const char *s) 271 { 272 _serial_puts(s,dev_index); 273 } 274 #else 275 void 276 serial_puts(const char *s) 277 { 278 _serial_puts(s,CONFIG_CONS_INDEX); 279 } 280 #endif 281 282 #if defined(CONFIG_SERIAL_MULTI) 283 static inline int 284 serial_getc_dev(unsigned int dev_index) 285 { 286 return _serial_getc(dev_index); 287 } 288 #else 289 int 290 serial_getc(void) 291 { 292 return _serial_getc(CONFIG_CONS_INDEX); 293 } 294 #endif 295 296 #if defined(CONFIG_SERIAL_MULTI) 297 static inline int 298 serial_tstc_dev(unsigned int dev_index) 299 { 300 return _serial_tstc(dev_index); 301 } 302 #else 303 int 304 serial_tstc(void) 305 { 306 return _serial_tstc(CONFIG_CONS_INDEX); 307 } 308 #endif 309 310 #if defined(CONFIG_SERIAL_MULTI) 311 static inline void 312 serial_setbrg_dev(unsigned int dev_index) 313 { 314 _serial_setbrg(dev_index); 315 } 316 #else 317 void 318 serial_setbrg(void) 319 { 320 _serial_setbrg(CONFIG_CONS_INDEX); 321 } 322 #endif 323 324 #if defined(CONFIG_SERIAL_MULTI) 325 326 DECLARE_ESERIAL_FUNCTIONS(1); 327 struct serial_device eserial1_device = 328 INIT_ESERIAL_STRUCTURE(1, "eserial0"); 329 DECLARE_ESERIAL_FUNCTIONS(2); 330 struct serial_device eserial2_device = 331 INIT_ESERIAL_STRUCTURE(2, "eserial1"); 332 DECLARE_ESERIAL_FUNCTIONS(3); 333 struct serial_device eserial3_device = 334 INIT_ESERIAL_STRUCTURE(3, "eserial2"); 335 DECLARE_ESERIAL_FUNCTIONS(4); 336 struct serial_device eserial4_device = 337 INIT_ESERIAL_STRUCTURE(4, "eserial3"); 338 339 __weak struct serial_device *default_serial_console(void) 340 { 341 #if CONFIG_CONS_INDEX == 1 342 return &eserial1_device; 343 #elif CONFIG_CONS_INDEX == 2 344 return &eserial2_device; 345 #elif CONFIG_CONS_INDEX == 3 346 return &eserial3_device; 347 #elif CONFIG_CONS_INDEX == 4 348 return &eserial4_device; 349 #else 350 #error "Bad CONFIG_CONS_INDEX." 351 #endif 352 } 353 354 #endif /* CONFIG_SERIAL_MULTI */ 355