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 #ifdef CONFIG_KIRKWOOD 31 #include <asm/arch/kirkwood.h> 32 #endif 33 34 #if defined (CONFIG_SERIAL_MULTI) 35 #include <serial.h> 36 #endif 37 38 DECLARE_GLOBAL_DATA_PTR; 39 40 #if !defined(CONFIG_CONS_INDEX) 41 #if defined (CONFIG_SERIAL_MULTI) 42 /* with CONFIG_SERIAL_MULTI we might have no console 43 * on these devices 44 */ 45 #else 46 #error "No console index specified." 47 #endif /* CONFIG_SERIAL_MULTI */ 48 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4) 49 #error "Invalid console index value." 50 #endif 51 52 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) 53 #error "Console port 1 defined but not configured." 54 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) 55 #error "Console port 2 defined but not configured." 56 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) 57 #error "Console port 3 defined but not configured." 58 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) 59 #error "Console port 4 defined but not configured." 60 #endif 61 62 /* Note: The port number specified in the functions is 1 based. 63 * the array is 0 based. 64 */ 65 static NS16550_t serial_ports[4] = { 66 #ifdef CONFIG_SYS_NS16550_COM1 67 (NS16550_t)CONFIG_SYS_NS16550_COM1, 68 #else 69 NULL, 70 #endif 71 #ifdef CONFIG_SYS_NS16550_COM2 72 (NS16550_t)CONFIG_SYS_NS16550_COM2, 73 #else 74 NULL, 75 #endif 76 #ifdef CONFIG_SYS_NS16550_COM3 77 (NS16550_t)CONFIG_SYS_NS16550_COM3, 78 #else 79 NULL, 80 #endif 81 #ifdef CONFIG_SYS_NS16550_COM4 82 (NS16550_t)CONFIG_SYS_NS16550_COM4 83 #else 84 NULL 85 #endif 86 }; 87 88 #define PORT serial_ports[port-1] 89 #if defined(CONFIG_CONS_INDEX) 90 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1]) 91 #endif 92 93 #if defined(CONFIG_SERIAL_MULTI) 94 95 /* Multi serial device functions */ 96 #define DECLARE_ESERIAL_FUNCTIONS(port) \ 97 int eserial##port##_init (void) {\ 98 int clock_divisor; \ 99 clock_divisor = calc_divisor(serial_ports[port-1]); \ 100 NS16550_init(serial_ports[port-1], clock_divisor); \ 101 return(0);}\ 102 void eserial##port##_setbrg (void) {\ 103 serial_setbrg_dev(port);}\ 104 int eserial##port##_getc (void) {\ 105 return serial_getc_dev(port);}\ 106 int eserial##port##_tstc (void) {\ 107 return serial_tstc_dev(port);}\ 108 void eserial##port##_putc (const char c) {\ 109 serial_putc_dev(port, c);}\ 110 void eserial##port##_puts (const char *s) {\ 111 serial_puts_dev(port, s);} 112 113 /* Serial device descriptor */ 114 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\ 115 name,\ 116 bus,\ 117 eserial##port##_init,\ 118 NULL,\ 119 eserial##port##_setbrg,\ 120 eserial##port##_getc,\ 121 eserial##port##_tstc,\ 122 eserial##port##_putc,\ 123 eserial##port##_puts, } 124 125 #endif /* CONFIG_SERIAL_MULTI */ 126 127 static int calc_divisor (NS16550_t port) 128 { 129 #ifdef CONFIG_OMAP1510 130 /* If can't cleanly clock 115200 set div to 1 */ 131 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 132 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 133 return (1); /* return 1 for base divisor */ 134 } 135 port->osc_12m_sel = 0; /* clear if previsouly set */ 136 #endif 137 #ifdef CONFIG_OMAP1610 138 /* If can't cleanly clock 115200 set div to 1 */ 139 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 140 return (26); /* return 26 for base divisor */ 141 } 142 #endif 143 144 #ifdef CONFIG_APTIX 145 #define MODE_X_DIV 13 146 #else 147 #define MODE_X_DIV 16 148 #endif 149 150 /* Compute divisor value. Normally, we should simply return: 151 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 152 * but we need to round that value by adding 0.5. 153 * Rounding is especially important at high baud rates. 154 */ 155 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 156 (MODE_X_DIV * gd->baudrate); 157 } 158 159 #if !defined(CONFIG_SERIAL_MULTI) 160 int serial_init (void) 161 { 162 int clock_divisor; 163 164 #ifdef CONFIG_NS87308 165 initialise_ns87308(); 166 #endif 167 168 #ifdef CONFIG_SYS_NS16550_COM1 169 clock_divisor = calc_divisor(serial_ports[0]); 170 NS16550_init(serial_ports[0], clock_divisor); 171 #endif 172 #ifdef CONFIG_SYS_NS16550_COM2 173 clock_divisor = calc_divisor(serial_ports[1]); 174 NS16550_init(serial_ports[1], clock_divisor); 175 #endif 176 #ifdef CONFIG_SYS_NS16550_COM3 177 clock_divisor = calc_divisor(serial_ports[2]); 178 NS16550_init(serial_ports[2], clock_divisor); 179 #endif 180 #ifdef CONFIG_SYS_NS16550_COM4 181 clock_divisor = calc_divisor(serial_ports[3]); 182 NS16550_init(serial_ports[3], clock_divisor); 183 #endif 184 185 return (0); 186 } 187 #endif 188 189 void 190 _serial_putc(const char c,const int port) 191 { 192 if (c == '\n') 193 NS16550_putc(PORT, '\r'); 194 195 NS16550_putc(PORT, c); 196 } 197 198 void 199 _serial_putc_raw(const char c,const int port) 200 { 201 NS16550_putc(PORT, c); 202 } 203 204 void 205 _serial_puts (const char *s,const int port) 206 { 207 while (*s) { 208 _serial_putc (*s++,port); 209 } 210 } 211 212 213 int 214 _serial_getc(const int port) 215 { 216 return NS16550_getc(PORT); 217 } 218 219 int 220 _serial_tstc(const int port) 221 { 222 return NS16550_tstc(PORT); 223 } 224 225 void 226 _serial_setbrg (const int port) 227 { 228 int clock_divisor; 229 230 clock_divisor = calc_divisor(PORT); 231 NS16550_reinit(PORT, clock_divisor); 232 } 233 234 #if defined(CONFIG_SERIAL_MULTI) 235 static inline void 236 serial_putc_dev(unsigned int dev_index,const char c) 237 { 238 _serial_putc(c,dev_index); 239 } 240 #else 241 void 242 serial_putc(const char c) 243 { 244 _serial_putc(c,CONFIG_CONS_INDEX); 245 } 246 #endif 247 248 #if defined(CONFIG_SERIAL_MULTI) 249 static inline void 250 serial_putc_raw_dev(unsigned int dev_index,const char c) 251 { 252 _serial_putc_raw(c,dev_index); 253 } 254 #else 255 void 256 serial_putc_raw(const char c) 257 { 258 _serial_putc_raw(c,CONFIG_CONS_INDEX); 259 } 260 #endif 261 262 #if defined(CONFIG_SERIAL_MULTI) 263 static inline void 264 serial_puts_dev(unsigned int dev_index,const char *s) 265 { 266 _serial_puts(s,dev_index); 267 } 268 #else 269 void 270 serial_puts(const char *s) 271 { 272 _serial_puts(s,CONFIG_CONS_INDEX); 273 } 274 #endif 275 276 #if defined(CONFIG_SERIAL_MULTI) 277 static inline int 278 serial_getc_dev(unsigned int dev_index) 279 { 280 return _serial_getc(dev_index); 281 } 282 #else 283 int 284 serial_getc(void) 285 { 286 return _serial_getc(CONFIG_CONS_INDEX); 287 } 288 #endif 289 290 #if defined(CONFIG_SERIAL_MULTI) 291 static inline int 292 serial_tstc_dev(unsigned int dev_index) 293 { 294 return _serial_tstc(dev_index); 295 } 296 #else 297 int 298 serial_tstc(void) 299 { 300 return _serial_tstc(CONFIG_CONS_INDEX); 301 } 302 #endif 303 304 #if defined(CONFIG_SERIAL_MULTI) 305 static inline void 306 serial_setbrg_dev(unsigned int dev_index) 307 { 308 _serial_setbrg(dev_index); 309 } 310 #else 311 void 312 serial_setbrg(void) 313 { 314 _serial_setbrg(CONFIG_CONS_INDEX); 315 } 316 #endif 317 318 #if defined(CONFIG_SERIAL_MULTI) 319 320 DECLARE_ESERIAL_FUNCTIONS(1); 321 struct serial_device eserial1_device = 322 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); 323 DECLARE_ESERIAL_FUNCTIONS(2); 324 struct serial_device eserial2_device = 325 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); 326 DECLARE_ESERIAL_FUNCTIONS(3); 327 struct serial_device eserial3_device = 328 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); 329 DECLARE_ESERIAL_FUNCTIONS(4); 330 struct serial_device eserial4_device = 331 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); 332 #endif /* CONFIG_SERIAL_MULTI */ 333