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 #ifdef CONFIG_ORION5X 34 #include <asm/arch/orion5x.h> 35 #endif 36 37 #if defined (CONFIG_SERIAL_MULTI) 38 #include <serial.h> 39 #endif 40 41 DECLARE_GLOBAL_DATA_PTR; 42 43 #if !defined(CONFIG_CONS_INDEX) 44 #if defined (CONFIG_SERIAL_MULTI) 45 /* with CONFIG_SERIAL_MULTI we might have no console 46 * on these devices 47 */ 48 #else 49 #error "No console index specified." 50 #endif /* CONFIG_SERIAL_MULTI */ 51 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4) 52 #error "Invalid console index value." 53 #endif 54 55 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) 56 #error "Console port 1 defined but not configured." 57 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) 58 #error "Console port 2 defined but not configured." 59 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) 60 #error "Console port 3 defined but not configured." 61 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) 62 #error "Console port 4 defined but not configured." 63 #endif 64 65 /* Note: The port number specified in the functions is 1 based. 66 * the array is 0 based. 67 */ 68 static NS16550_t serial_ports[4] = { 69 #ifdef CONFIG_SYS_NS16550_COM1 70 (NS16550_t)CONFIG_SYS_NS16550_COM1, 71 #else 72 NULL, 73 #endif 74 #ifdef CONFIG_SYS_NS16550_COM2 75 (NS16550_t)CONFIG_SYS_NS16550_COM2, 76 #else 77 NULL, 78 #endif 79 #ifdef CONFIG_SYS_NS16550_COM3 80 (NS16550_t)CONFIG_SYS_NS16550_COM3, 81 #else 82 NULL, 83 #endif 84 #ifdef CONFIG_SYS_NS16550_COM4 85 (NS16550_t)CONFIG_SYS_NS16550_COM4 86 #else 87 NULL 88 #endif 89 }; 90 91 #define PORT serial_ports[port-1] 92 #if defined(CONFIG_CONS_INDEX) 93 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1]) 94 #endif 95 96 #if defined(CONFIG_SERIAL_MULTI) 97 98 /* Multi serial device functions */ 99 #define DECLARE_ESERIAL_FUNCTIONS(port) \ 100 int eserial##port##_init (void) {\ 101 int clock_divisor; \ 102 clock_divisor = calc_divisor(serial_ports[port-1]); \ 103 NS16550_init(serial_ports[port-1], clock_divisor); \ 104 return(0);}\ 105 void eserial##port##_setbrg (void) {\ 106 serial_setbrg_dev(port);}\ 107 int eserial##port##_getc (void) {\ 108 return serial_getc_dev(port);}\ 109 int eserial##port##_tstc (void) {\ 110 return serial_tstc_dev(port);}\ 111 void eserial##port##_putc (const char c) {\ 112 serial_putc_dev(port, c);}\ 113 void eserial##port##_puts (const char *s) {\ 114 serial_puts_dev(port, s);} 115 116 /* Serial device descriptor */ 117 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\ 118 name,\ 119 bus,\ 120 eserial##port##_init,\ 121 NULL,\ 122 eserial##port##_setbrg,\ 123 eserial##port##_getc,\ 124 eserial##port##_tstc,\ 125 eserial##port##_putc,\ 126 eserial##port##_puts, } 127 128 #endif /* CONFIG_SERIAL_MULTI */ 129 130 static int calc_divisor (NS16550_t port) 131 { 132 #ifdef CONFIG_OMAP1510 133 /* If can't cleanly clock 115200 set div to 1 */ 134 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 135 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 136 return (1); /* return 1 for base divisor */ 137 } 138 port->osc_12m_sel = 0; /* clear if previsouly set */ 139 #endif 140 #ifdef CONFIG_OMAP1610 141 /* If can't cleanly clock 115200 set div to 1 */ 142 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 143 return (26); /* return 26 for base divisor */ 144 } 145 #endif 146 147 #ifdef CONFIG_APTIX 148 #define MODE_X_DIV 13 149 #else 150 #define MODE_X_DIV 16 151 #endif 152 153 /* Compute divisor value. Normally, we should simply return: 154 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 155 * but we need to round that value by adding 0.5. 156 * Rounding is especially important at high baud rates. 157 */ 158 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 159 (MODE_X_DIV * gd->baudrate); 160 } 161 162 #if !defined(CONFIG_SERIAL_MULTI) 163 int serial_init (void) 164 { 165 int clock_divisor; 166 167 #ifdef CONFIG_NS87308 168 initialise_ns87308(); 169 #endif 170 171 #ifdef CONFIG_SYS_NS16550_COM1 172 clock_divisor = calc_divisor(serial_ports[0]); 173 NS16550_init(serial_ports[0], clock_divisor); 174 #endif 175 #ifdef CONFIG_SYS_NS16550_COM2 176 clock_divisor = calc_divisor(serial_ports[1]); 177 NS16550_init(serial_ports[1], clock_divisor); 178 #endif 179 #ifdef CONFIG_SYS_NS16550_COM3 180 clock_divisor = calc_divisor(serial_ports[2]); 181 NS16550_init(serial_ports[2], clock_divisor); 182 #endif 183 #ifdef CONFIG_SYS_NS16550_COM4 184 clock_divisor = calc_divisor(serial_ports[3]); 185 NS16550_init(serial_ports[3], clock_divisor); 186 #endif 187 188 return (0); 189 } 190 #endif 191 192 void 193 _serial_putc(const char c,const int port) 194 { 195 if (c == '\n') 196 NS16550_putc(PORT, '\r'); 197 198 NS16550_putc(PORT, c); 199 } 200 201 void 202 _serial_putc_raw(const char c,const int port) 203 { 204 NS16550_putc(PORT, c); 205 } 206 207 void 208 _serial_puts (const char *s,const int port) 209 { 210 while (*s) { 211 _serial_putc (*s++,port); 212 } 213 } 214 215 216 int 217 _serial_getc(const int port) 218 { 219 return NS16550_getc(PORT); 220 } 221 222 int 223 _serial_tstc(const int port) 224 { 225 return NS16550_tstc(PORT); 226 } 227 228 void 229 _serial_setbrg (const int port) 230 { 231 int clock_divisor; 232 233 clock_divisor = calc_divisor(PORT); 234 NS16550_reinit(PORT, clock_divisor); 235 } 236 237 #if defined(CONFIG_SERIAL_MULTI) 238 static inline void 239 serial_putc_dev(unsigned int dev_index,const char c) 240 { 241 _serial_putc(c,dev_index); 242 } 243 #else 244 void 245 serial_putc(const char c) 246 { 247 _serial_putc(c,CONFIG_CONS_INDEX); 248 } 249 #endif 250 251 #if defined(CONFIG_SERIAL_MULTI) 252 static inline void 253 serial_putc_raw_dev(unsigned int dev_index,const char c) 254 { 255 _serial_putc_raw(c,dev_index); 256 } 257 #else 258 void 259 serial_putc_raw(const char c) 260 { 261 _serial_putc_raw(c,CONFIG_CONS_INDEX); 262 } 263 #endif 264 265 #if defined(CONFIG_SERIAL_MULTI) 266 static inline void 267 serial_puts_dev(unsigned int dev_index,const char *s) 268 { 269 _serial_puts(s,dev_index); 270 } 271 #else 272 void 273 serial_puts(const char *s) 274 { 275 _serial_puts(s,CONFIG_CONS_INDEX); 276 } 277 #endif 278 279 #if defined(CONFIG_SERIAL_MULTI) 280 static inline int 281 serial_getc_dev(unsigned int dev_index) 282 { 283 return _serial_getc(dev_index); 284 } 285 #else 286 int 287 serial_getc(void) 288 { 289 return _serial_getc(CONFIG_CONS_INDEX); 290 } 291 #endif 292 293 #if defined(CONFIG_SERIAL_MULTI) 294 static inline int 295 serial_tstc_dev(unsigned int dev_index) 296 { 297 return _serial_tstc(dev_index); 298 } 299 #else 300 int 301 serial_tstc(void) 302 { 303 return _serial_tstc(CONFIG_CONS_INDEX); 304 } 305 #endif 306 307 #if defined(CONFIG_SERIAL_MULTI) 308 static inline void 309 serial_setbrg_dev(unsigned int dev_index) 310 { 311 _serial_setbrg(dev_index); 312 } 313 #else 314 void 315 serial_setbrg(void) 316 { 317 _serial_setbrg(CONFIG_CONS_INDEX); 318 } 319 #endif 320 321 #if defined(CONFIG_SERIAL_MULTI) 322 323 DECLARE_ESERIAL_FUNCTIONS(1); 324 struct serial_device eserial1_device = 325 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); 326 DECLARE_ESERIAL_FUNCTIONS(2); 327 struct serial_device eserial2_device = 328 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); 329 DECLARE_ESERIAL_FUNCTIONS(3); 330 struct serial_device eserial3_device = 331 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); 332 DECLARE_ESERIAL_FUNCTIONS(4); 333 struct serial_device eserial4_device = 334 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); 335 #endif /* CONFIG_SERIAL_MULTI */ 336