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 eserial##port##_setbrg,\ 119 eserial##port##_getc,\ 120 eserial##port##_tstc,\ 121 eserial##port##_putc,\ 122 eserial##port##_puts, } 123 124 #endif /* CONFIG_SERIAL_MULTI */ 125 126 static int calc_divisor (NS16550_t port) 127 { 128 #ifdef CONFIG_OMAP1510 129 /* If can't cleanly clock 115200 set div to 1 */ 130 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 131 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 132 return (1); /* return 1 for base divisor */ 133 } 134 port->osc_12m_sel = 0; /* clear if previsouly set */ 135 #endif 136 #ifdef CONFIG_OMAP1610 137 /* If can't cleanly clock 115200 set div to 1 */ 138 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 139 return (26); /* return 26 for base divisor */ 140 } 141 #endif 142 143 #ifdef CONFIG_APTIX 144 #define MODE_X_DIV 13 145 #else 146 #define MODE_X_DIV 16 147 #endif 148 149 /* Compute divisor value. Normally, we should simply return: 150 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 151 * but we need to round that value by adding 0.5. 152 * Rounding is especially important at high baud rates. 153 */ 154 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 155 (MODE_X_DIV * gd->baudrate); 156 } 157 158 #if !defined(CONFIG_SERIAL_MULTI) 159 int serial_init (void) 160 { 161 int clock_divisor; 162 163 #ifdef CONFIG_NS87308 164 initialise_ns87308(); 165 #endif 166 167 #ifdef CONFIG_SYS_NS16550_COM1 168 clock_divisor = calc_divisor(serial_ports[0]); 169 NS16550_init(serial_ports[0], clock_divisor); 170 #endif 171 #ifdef CONFIG_SYS_NS16550_COM2 172 clock_divisor = calc_divisor(serial_ports[1]); 173 NS16550_init(serial_ports[1], clock_divisor); 174 #endif 175 #ifdef CONFIG_SYS_NS16550_COM3 176 clock_divisor = calc_divisor(serial_ports[2]); 177 NS16550_init(serial_ports[2], clock_divisor); 178 #endif 179 #ifdef CONFIG_SYS_NS16550_COM4 180 clock_divisor = calc_divisor(serial_ports[3]); 181 NS16550_init(serial_ports[3], clock_divisor); 182 #endif 183 184 return (0); 185 } 186 #endif 187 188 void 189 _serial_putc(const char c,const int port) 190 { 191 if (c == '\n') 192 NS16550_putc(PORT, '\r'); 193 194 NS16550_putc(PORT, c); 195 } 196 197 void 198 _serial_putc_raw(const char c,const int port) 199 { 200 NS16550_putc(PORT, c); 201 } 202 203 void 204 _serial_puts (const char *s,const int port) 205 { 206 while (*s) { 207 _serial_putc (*s++,port); 208 } 209 } 210 211 212 int 213 _serial_getc(const int port) 214 { 215 return NS16550_getc(PORT); 216 } 217 218 int 219 _serial_tstc(const int port) 220 { 221 return NS16550_tstc(PORT); 222 } 223 224 void 225 _serial_setbrg (const int port) 226 { 227 int clock_divisor; 228 229 clock_divisor = calc_divisor(PORT); 230 NS16550_reinit(PORT, clock_divisor); 231 } 232 233 #if defined(CONFIG_SERIAL_MULTI) 234 static inline void 235 serial_putc_dev(unsigned int dev_index,const char c) 236 { 237 _serial_putc(c,dev_index); 238 } 239 #else 240 void 241 serial_putc(const char c) 242 { 243 _serial_putc(c,CONFIG_CONS_INDEX); 244 } 245 #endif 246 247 #if defined(CONFIG_SERIAL_MULTI) 248 static inline void 249 serial_putc_raw_dev(unsigned int dev_index,const char c) 250 { 251 _serial_putc_raw(c,dev_index); 252 } 253 #else 254 void 255 serial_putc_raw(const char c) 256 { 257 _serial_putc_raw(c,CONFIG_CONS_INDEX); 258 } 259 #endif 260 261 #if defined(CONFIG_SERIAL_MULTI) 262 static inline void 263 serial_puts_dev(unsigned int dev_index,const char *s) 264 { 265 _serial_puts(s,dev_index); 266 } 267 #else 268 void 269 serial_puts(const char *s) 270 { 271 _serial_puts(s,CONFIG_CONS_INDEX); 272 } 273 #endif 274 275 #if defined(CONFIG_SERIAL_MULTI) 276 static inline int 277 serial_getc_dev(unsigned int dev_index) 278 { 279 return _serial_getc(dev_index); 280 } 281 #else 282 int 283 serial_getc(void) 284 { 285 return _serial_getc(CONFIG_CONS_INDEX); 286 } 287 #endif 288 289 #if defined(CONFIG_SERIAL_MULTI) 290 static inline int 291 serial_tstc_dev(unsigned int dev_index) 292 { 293 return _serial_tstc(dev_index); 294 } 295 #else 296 int 297 serial_tstc(void) 298 { 299 return _serial_tstc(CONFIG_CONS_INDEX); 300 } 301 #endif 302 303 #if defined(CONFIG_SERIAL_MULTI) 304 static inline void 305 serial_setbrg_dev(unsigned int dev_index) 306 { 307 _serial_setbrg(dev_index); 308 } 309 #else 310 void 311 serial_setbrg(void) 312 { 313 _serial_setbrg(CONFIG_CONS_INDEX); 314 } 315 #endif 316 317 #if defined(CONFIG_SERIAL_MULTI) 318 319 DECLARE_ESERIAL_FUNCTIONS(1); 320 struct serial_device eserial1_device = 321 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); 322 DECLARE_ESERIAL_FUNCTIONS(2); 323 struct serial_device eserial2_device = 324 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); 325 DECLARE_ESERIAL_FUNCTIONS(3); 326 struct serial_device eserial3_device = 327 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); 328 DECLARE_ESERIAL_FUNCTIONS(4); 329 struct serial_device eserial4_device = 330 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); 331 #endif /* CONFIG_SERIAL_MULTI */ 332