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