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 26 #ifdef CFG_NS16550_SERIAL 27 28 #include <ns16550.h> 29 #ifdef CONFIG_NS87308 30 #include <ns87308.h> 31 #endif 32 33 #if defined (CONFIG_SERIAL_MULTI) 34 #include <serial.h> 35 #endif 36 37 DECLARE_GLOBAL_DATA_PTR; 38 39 #if !defined(CONFIG_CONS_INDEX) 40 #if defined (CONFIG_SERIAL_MULTI) 41 /* with CONFIG_SERIAL_MULTI we might have no console 42 * on these devices 43 */ 44 #else 45 #error "No console index specified." 46 #endif /* CONFIG_SERIAL_MULTI */ 47 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4) 48 #error "Invalid console index value." 49 #endif 50 51 #if CONFIG_CONS_INDEX == 1 && !defined(CFG_NS16550_COM1) 52 #error "Console port 1 defined but not configured." 53 #elif CONFIG_CONS_INDEX == 2 && !defined(CFG_NS16550_COM2) 54 #error "Console port 2 defined but not configured." 55 #elif CONFIG_CONS_INDEX == 3 && !defined(CFG_NS16550_COM3) 56 #error "Console port 3 defined but not configured." 57 #elif CONFIG_CONS_INDEX == 4 && !defined(CFG_NS16550_COM4) 58 #error "Console port 4 defined but not configured." 59 #endif 60 61 /* Note: The port number specified in the functions is 1 based. 62 * the array is 0 based. 63 */ 64 static NS16550_t serial_ports[4] = { 65 #ifdef CFG_NS16550_COM1 66 (NS16550_t)CFG_NS16550_COM1, 67 #else 68 NULL, 69 #endif 70 #ifdef CFG_NS16550_COM2 71 (NS16550_t)CFG_NS16550_COM2, 72 #else 73 NULL, 74 #endif 75 #ifdef CFG_NS16550_COM3 76 (NS16550_t)CFG_NS16550_COM3, 77 #else 78 NULL, 79 #endif 80 #ifdef CFG_NS16550_COM4 81 (NS16550_t)CFG_NS16550_COM4 82 #else 83 NULL 84 #endif 85 }; 86 87 #define PORT serial_ports[port-1] 88 #if defined(CONFIG_CONS_INDEX) 89 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1]) 90 #endif 91 92 #if defined(CONFIG_SERIAL_MULTI) 93 94 /* Multi serial device functions */ 95 #define DECLARE_ESERIAL_FUNCTIONS(port) \ 96 int eserial##port##_init (void) {\ 97 int clock_divisor; \ 98 clock_divisor = calc_divisor(serial_ports[port-1]); \ 99 NS16550_init(serial_ports[port-1], clock_divisor); \ 100 return(0);}\ 101 void eserial##port##_setbrg (void) {\ 102 serial_setbrg_dev(port);}\ 103 int eserial##port##_getc (void) {\ 104 return serial_getc_dev(port);}\ 105 int eserial##port##_tstc (void) {\ 106 return serial_tstc_dev(port);}\ 107 void eserial##port##_putc (const char c) {\ 108 serial_putc_dev(port, c);}\ 109 void eserial##port##_puts (const char *s) {\ 110 serial_puts_dev(port, s);} 111 112 /* Serial device descriptor */ 113 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\ 114 name,\ 115 bus,\ 116 eserial##port##_init,\ 117 eserial##port##_setbrg,\ 118 eserial##port##_getc,\ 119 eserial##port##_tstc,\ 120 eserial##port##_putc,\ 121 eserial##port##_puts, } 122 123 #endif /* CONFIG_SERIAL_MULTI */ 124 125 static int calc_divisor (NS16550_t port) 126 { 127 #ifdef CONFIG_OMAP1510 128 /* If can't cleanly clock 115200 set div to 1 */ 129 if ((CFG_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 130 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 131 return (1); /* return 1 for base divisor */ 132 } 133 port->osc_12m_sel = 0; /* clear if previsouly set */ 134 #endif 135 #ifdef CONFIG_OMAP1610 136 /* If can't cleanly clock 115200 set div to 1 */ 137 if ((CFG_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 138 return (26); /* return 26 for base divisor */ 139 } 140 #endif 141 142 #ifdef CONFIG_APTIX 143 #define MODE_X_DIV 13 144 #else 145 #define MODE_X_DIV 16 146 #endif 147 148 /* Compute divisor value. Normally, we should simply return: 149 * CFG_NS16550_CLK) / MODE_X_DIV / gd->baudrate 150 * but we need to round that value by adding 0.5. 151 * Rounding is especially important at high baud rates. 152 */ 153 return (CFG_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 154 (MODE_X_DIV * gd->baudrate); 155 } 156 157 #if !defined(CONFIG_SERIAL_MULTI) 158 int serial_init (void) 159 { 160 int clock_divisor; 161 162 #ifdef CONFIG_NS87308 163 initialise_ns87308(); 164 #endif 165 166 #ifdef CFG_NS16550_COM1 167 clock_divisor = calc_divisor(serial_ports[0]); 168 NS16550_init(serial_ports[0], clock_divisor); 169 #endif 170 #ifdef CFG_NS16550_COM2 171 clock_divisor = calc_divisor(serial_ports[1]); 172 NS16550_init(serial_ports[1], clock_divisor); 173 #endif 174 #ifdef CFG_NS16550_COM3 175 clock_divisor = calc_divisor(serial_ports[2]); 176 NS16550_init(serial_ports[2], clock_divisor); 177 #endif 178 #ifdef CFG_NS16550_COM4 179 clock_divisor = calc_divisor(serial_ports[3]); 180 NS16550_init(serial_ports[3], clock_divisor); 181 #endif 182 183 return (0); 184 } 185 #endif 186 187 void 188 _serial_putc(const char c,const int port) 189 { 190 if (c == '\n') 191 NS16550_putc(PORT, '\r'); 192 193 NS16550_putc(PORT, c); 194 } 195 196 void 197 _serial_putc_raw(const char c,const int port) 198 { 199 NS16550_putc(PORT, c); 200 } 201 202 void 203 _serial_puts (const char *s,const int port) 204 { 205 while (*s) { 206 _serial_putc (*s++,port); 207 } 208 } 209 210 211 int 212 _serial_getc(const int port) 213 { 214 return NS16550_getc(PORT); 215 } 216 217 int 218 _serial_tstc(const int port) 219 { 220 return NS16550_tstc(PORT); 221 } 222 223 void 224 _serial_setbrg (const int port) 225 { 226 int clock_divisor; 227 228 clock_divisor = calc_divisor(PORT); 229 NS16550_reinit(PORT, clock_divisor); 230 } 231 232 #if defined(CONFIG_SERIAL_MULTI) 233 static inline void 234 serial_putc_dev(unsigned int dev_index,const char c) 235 { 236 _serial_putc(c,dev_index); 237 } 238 #else 239 void 240 serial_putc(const char c) 241 { 242 _serial_putc(c,CONFIG_CONS_INDEX); 243 } 244 #endif 245 246 #if defined(CONFIG_SERIAL_MULTI) 247 static inline void 248 serial_putc_raw_dev(unsigned int dev_index,const char c) 249 { 250 _serial_putc_raw(c,dev_index); 251 } 252 #else 253 void 254 serial_putc_raw(const char c) 255 { 256 _serial_putc_raw(c,CONFIG_CONS_INDEX); 257 } 258 #endif 259 260 #if defined(CONFIG_SERIAL_MULTI) 261 static inline void 262 serial_puts_dev(unsigned int dev_index,const char *s) 263 { 264 _serial_puts(s,dev_index); 265 } 266 #else 267 void 268 serial_puts(const char *s) 269 { 270 _serial_puts(s,CONFIG_CONS_INDEX); 271 } 272 #endif 273 274 #if defined(CONFIG_SERIAL_MULTI) 275 static inline int 276 serial_getc_dev(unsigned int dev_index) 277 { 278 return _serial_getc(dev_index); 279 } 280 #else 281 int 282 serial_getc(void) 283 { 284 return _serial_getc(CONFIG_CONS_INDEX); 285 } 286 #endif 287 288 #if defined(CONFIG_SERIAL_MULTI) 289 static inline int 290 serial_tstc_dev(unsigned int dev_index) 291 { 292 return _serial_tstc(dev_index); 293 } 294 #else 295 int 296 serial_tstc(void) 297 { 298 return _serial_tstc(CONFIG_CONS_INDEX); 299 } 300 #endif 301 302 #if defined(CONFIG_SERIAL_MULTI) 303 static inline void 304 serial_setbrg_dev(unsigned int dev_index) 305 { 306 _serial_setbrg(dev_index); 307 } 308 #else 309 void 310 serial_setbrg(void) 311 { 312 _serial_setbrg(CONFIG_CONS_INDEX); 313 } 314 #endif 315 316 #if defined(CONFIG_SERIAL_MULTI) 317 318 DECLARE_ESERIAL_FUNCTIONS(1); 319 struct serial_device eserial1_device = 320 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); 321 DECLARE_ESERIAL_FUNCTIONS(2); 322 struct serial_device eserial2_device = 323 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); 324 DECLARE_ESERIAL_FUNCTIONS(3); 325 struct serial_device eserial3_device = 326 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); 327 DECLARE_ESERIAL_FUNCTIONS(4); 328 struct serial_device eserial4_device = 329 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); 330 #endif /* CONFIG_SERIAL_MULTI */ 331 332 #endif 333