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 CFG_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 return (CFG_NS16550_CLK / MODE_X_DIV / gd->baudrate); 148 149 } 150 151 #if !defined(CONFIG_SERIAL_MULTI) 152 int serial_init (void) 153 { 154 int clock_divisor; 155 156 #ifdef CFG_NS87308 157 initialise_ns87308(); 158 #endif 159 160 #ifdef CFG_NS16550_COM1 161 clock_divisor = calc_divisor(serial_ports[0]); 162 NS16550_init(serial_ports[0], clock_divisor); 163 #endif 164 #ifdef CFG_NS16550_COM2 165 clock_divisor = calc_divisor(serial_ports[1]); 166 NS16550_init(serial_ports[1], clock_divisor); 167 #endif 168 #ifdef CFG_NS16550_COM3 169 clock_divisor = calc_divisor(serial_ports[2]); 170 NS16550_init(serial_ports[2], clock_divisor); 171 #endif 172 #ifdef CFG_NS16550_COM4 173 clock_divisor = calc_divisor(serial_ports[3]); 174 NS16550_init(serial_ports[3], clock_divisor); 175 #endif 176 177 return (0); 178 } 179 #endif 180 181 void 182 _serial_putc(const char c,const int port) 183 { 184 if (c == '\n') 185 NS16550_putc(PORT, '\r'); 186 187 NS16550_putc(PORT, c); 188 } 189 190 void 191 _serial_putc_raw(const char c,const int port) 192 { 193 NS16550_putc(PORT, c); 194 } 195 196 void 197 _serial_puts (const char *s,const int port) 198 { 199 while (*s) { 200 _serial_putc (*s++,port); 201 } 202 } 203 204 205 int 206 _serial_getc(const int port) 207 { 208 return NS16550_getc(PORT); 209 } 210 211 int 212 _serial_tstc(const int port) 213 { 214 return NS16550_tstc(PORT); 215 } 216 217 void 218 _serial_setbrg (const int port) 219 { 220 int clock_divisor; 221 222 clock_divisor = calc_divisor(PORT); 223 NS16550_reinit(PORT, clock_divisor); 224 } 225 226 #if defined(CONFIG_SERIAL_MULTI) 227 static inline void 228 serial_putc_dev(unsigned int dev_index,const char c) 229 { 230 _serial_putc(c,dev_index); 231 } 232 #else 233 void 234 serial_putc(const char c) 235 { 236 _serial_putc(c,CONFIG_CONS_INDEX); 237 } 238 #endif 239 240 #if defined(CONFIG_SERIAL_MULTI) 241 static inline void 242 serial_putc_raw_dev(unsigned int dev_index,const char c) 243 { 244 _serial_putc_raw(c,dev_index); 245 } 246 #else 247 void 248 serial_putc_raw(const char c) 249 { 250 _serial_putc_raw(c,CONFIG_CONS_INDEX); 251 } 252 #endif 253 254 #if defined(CONFIG_SERIAL_MULTI) 255 static inline void 256 serial_puts_dev(unsigned int dev_index,const char *s) 257 { 258 _serial_puts(s,dev_index); 259 } 260 #else 261 void 262 serial_puts(const char *s) 263 { 264 _serial_puts(s,CONFIG_CONS_INDEX); 265 } 266 #endif 267 268 #if defined(CONFIG_SERIAL_MULTI) 269 static inline int 270 serial_getc_dev(unsigned int dev_index) 271 { 272 return _serial_getc(dev_index); 273 } 274 #else 275 int 276 serial_getc(void) 277 { 278 return _serial_getc(CONFIG_CONS_INDEX); 279 } 280 #endif 281 282 #if defined(CONFIG_SERIAL_MULTI) 283 static inline int 284 serial_tstc_dev(unsigned int dev_index) 285 { 286 return _serial_tstc(dev_index); 287 } 288 #else 289 int 290 serial_tstc(void) 291 { 292 return _serial_tstc(CONFIG_CONS_INDEX); 293 } 294 #endif 295 296 #if defined(CONFIG_SERIAL_MULTI) 297 static inline void 298 serial_setbrg_dev(unsigned int dev_index) 299 { 300 _serial_setbrg(dev_index); 301 } 302 #else 303 void 304 serial_setbrg(void) 305 { 306 _serial_setbrg(CONFIG_CONS_INDEX); 307 } 308 #endif 309 310 #if defined(CONFIG_SERIAL_MULTI) 311 312 DECLARE_ESERIAL_FUNCTIONS(1); 313 struct serial_device eserial1_device = 314 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); 315 DECLARE_ESERIAL_FUNCTIONS(2); 316 struct serial_device eserial2_device = 317 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); 318 DECLARE_ESERIAL_FUNCTIONS(3); 319 struct serial_device eserial3_device = 320 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); 321 DECLARE_ESERIAL_FUNCTIONS(4); 322 struct serial_device eserial4_device = 323 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); 324 #endif /* CONFIG_SERIAL_MULTI */ 325 326 #endif 327