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