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 #elif defined(CONFIG_ORION5X) 33 #include <asm/arch/orion5x.h> 34 #elif defined(CONFIG_ARMADA100) 35 #include <asm/arch/armada100.h> 36 #endif 37 38 #if defined (CONFIG_SERIAL_MULTI) 39 #include <serial.h> 40 #endif 41 42 DECLARE_GLOBAL_DATA_PTR; 43 44 #if !defined(CONFIG_CONS_INDEX) 45 #if defined (CONFIG_SERIAL_MULTI) 46 /* with CONFIG_SERIAL_MULTI we might have no console 47 * on these devices 48 */ 49 #else 50 #error "No console index specified." 51 #endif /* CONFIG_SERIAL_MULTI */ 52 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4) 53 #error "Invalid console index value." 54 #endif 55 56 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) 57 #error "Console port 1 defined but not configured." 58 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) 59 #error "Console port 2 defined but not configured." 60 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) 61 #error "Console port 3 defined but not configured." 62 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) 63 #error "Console port 4 defined but not configured." 64 #endif 65 66 /* Note: The port number specified in the functions is 1 based. 67 * the array is 0 based. 68 */ 69 static NS16550_t serial_ports[4] = { 70 #ifdef CONFIG_SYS_NS16550_COM1 71 (NS16550_t)CONFIG_SYS_NS16550_COM1, 72 #else 73 NULL, 74 #endif 75 #ifdef CONFIG_SYS_NS16550_COM2 76 (NS16550_t)CONFIG_SYS_NS16550_COM2, 77 #else 78 NULL, 79 #endif 80 #ifdef CONFIG_SYS_NS16550_COM3 81 (NS16550_t)CONFIG_SYS_NS16550_COM3, 82 #else 83 NULL, 84 #endif 85 #ifdef CONFIG_SYS_NS16550_COM4 86 (NS16550_t)CONFIG_SYS_NS16550_COM4 87 #else 88 NULL 89 #endif 90 }; 91 92 #define PORT serial_ports[port-1] 93 #if defined(CONFIG_CONS_INDEX) 94 #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1]) 95 #endif 96 97 #if defined(CONFIG_SERIAL_MULTI) 98 99 /* Multi serial device functions */ 100 #define DECLARE_ESERIAL_FUNCTIONS(port) \ 101 int eserial##port##_init (void) {\ 102 int clock_divisor; \ 103 clock_divisor = calc_divisor(serial_ports[port-1]); \ 104 NS16550_init(serial_ports[port-1], clock_divisor); \ 105 return(0);}\ 106 void eserial##port##_setbrg (void) {\ 107 serial_setbrg_dev(port);}\ 108 int eserial##port##_getc (void) {\ 109 return serial_getc_dev(port);}\ 110 int eserial##port##_tstc (void) {\ 111 return serial_tstc_dev(port);}\ 112 void eserial##port##_putc (const char c) {\ 113 serial_putc_dev(port, c);}\ 114 void eserial##port##_puts (const char *s) {\ 115 serial_puts_dev(port, s);} 116 117 /* Serial device descriptor */ 118 #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\ 119 name,\ 120 bus,\ 121 eserial##port##_init,\ 122 NULL,\ 123 eserial##port##_setbrg,\ 124 eserial##port##_getc,\ 125 eserial##port##_tstc,\ 126 eserial##port##_putc,\ 127 eserial##port##_puts, } 128 129 #endif /* CONFIG_SERIAL_MULTI */ 130 131 static int calc_divisor (NS16550_t port) 132 { 133 #ifdef CONFIG_OMAP1510 134 /* If can't cleanly clock 115200 set div to 1 */ 135 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 136 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 137 return (1); /* return 1 for base divisor */ 138 } 139 port->osc_12m_sel = 0; /* clear if previsouly set */ 140 #endif 141 #ifdef CONFIG_OMAP1610 142 /* If can't cleanly clock 115200 set div to 1 */ 143 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 144 return (26); /* return 26 for base divisor */ 145 } 146 #endif 147 148 #ifdef CONFIG_APTIX 149 #define MODE_X_DIV 13 150 #else 151 #define MODE_X_DIV 16 152 #endif 153 154 /* Compute divisor value. Normally, we should simply return: 155 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 156 * but we need to round that value by adding 0.5. 157 * Rounding is especially important at high baud rates. 158 */ 159 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 160 (MODE_X_DIV * gd->baudrate); 161 } 162 163 #if !defined(CONFIG_SERIAL_MULTI) 164 int serial_init (void) 165 { 166 int clock_divisor; 167 168 #ifdef CONFIG_NS87308 169 initialise_ns87308(); 170 #endif 171 172 #ifdef CONFIG_SYS_NS16550_COM1 173 clock_divisor = calc_divisor(serial_ports[0]); 174 NS16550_init(serial_ports[0], clock_divisor); 175 #endif 176 #ifdef CONFIG_SYS_NS16550_COM2 177 clock_divisor = calc_divisor(serial_ports[1]); 178 NS16550_init(serial_ports[1], clock_divisor); 179 #endif 180 #ifdef CONFIG_SYS_NS16550_COM3 181 clock_divisor = calc_divisor(serial_ports[2]); 182 NS16550_init(serial_ports[2], clock_divisor); 183 #endif 184 #ifdef CONFIG_SYS_NS16550_COM4 185 clock_divisor = calc_divisor(serial_ports[3]); 186 NS16550_init(serial_ports[3], clock_divisor); 187 #endif 188 189 return (0); 190 } 191 #endif 192 193 void 194 _serial_putc(const char c,const int port) 195 { 196 if (c == '\n') 197 NS16550_putc(PORT, '\r'); 198 199 NS16550_putc(PORT, c); 200 } 201 202 void 203 _serial_putc_raw(const char c,const int port) 204 { 205 NS16550_putc(PORT, c); 206 } 207 208 void 209 _serial_puts (const char *s,const int port) 210 { 211 while (*s) { 212 _serial_putc (*s++,port); 213 } 214 } 215 216 217 int 218 _serial_getc(const int port) 219 { 220 return NS16550_getc(PORT); 221 } 222 223 int 224 _serial_tstc(const int port) 225 { 226 return NS16550_tstc(PORT); 227 } 228 229 void 230 _serial_setbrg (const int port) 231 { 232 int clock_divisor; 233 234 clock_divisor = calc_divisor(PORT); 235 NS16550_reinit(PORT, clock_divisor); 236 } 237 238 #if defined(CONFIG_SERIAL_MULTI) 239 static inline void 240 serial_putc_dev(unsigned int dev_index,const char c) 241 { 242 _serial_putc(c,dev_index); 243 } 244 #else 245 void 246 serial_putc(const char c) 247 { 248 _serial_putc(c,CONFIG_CONS_INDEX); 249 } 250 #endif 251 252 #if defined(CONFIG_SERIAL_MULTI) 253 static inline void 254 serial_putc_raw_dev(unsigned int dev_index,const char c) 255 { 256 _serial_putc_raw(c,dev_index); 257 } 258 #else 259 void 260 serial_putc_raw(const char c) 261 { 262 _serial_putc_raw(c,CONFIG_CONS_INDEX); 263 } 264 #endif 265 266 #if defined(CONFIG_SERIAL_MULTI) 267 static inline void 268 serial_puts_dev(unsigned int dev_index,const char *s) 269 { 270 _serial_puts(s,dev_index); 271 } 272 #else 273 void 274 serial_puts(const char *s) 275 { 276 _serial_puts(s,CONFIG_CONS_INDEX); 277 } 278 #endif 279 280 #if defined(CONFIG_SERIAL_MULTI) 281 static inline int 282 serial_getc_dev(unsigned int dev_index) 283 { 284 return _serial_getc(dev_index); 285 } 286 #else 287 int 288 serial_getc(void) 289 { 290 return _serial_getc(CONFIG_CONS_INDEX); 291 } 292 #endif 293 294 #if defined(CONFIG_SERIAL_MULTI) 295 static inline int 296 serial_tstc_dev(unsigned int dev_index) 297 { 298 return _serial_tstc(dev_index); 299 } 300 #else 301 int 302 serial_tstc(void) 303 { 304 return _serial_tstc(CONFIG_CONS_INDEX); 305 } 306 #endif 307 308 #if defined(CONFIG_SERIAL_MULTI) 309 static inline void 310 serial_setbrg_dev(unsigned int dev_index) 311 { 312 _serial_setbrg(dev_index); 313 } 314 #else 315 void 316 serial_setbrg(void) 317 { 318 _serial_setbrg(CONFIG_CONS_INDEX); 319 } 320 #endif 321 322 #if defined(CONFIG_SERIAL_MULTI) 323 324 DECLARE_ESERIAL_FUNCTIONS(1); 325 struct serial_device eserial1_device = 326 INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); 327 DECLARE_ESERIAL_FUNCTIONS(2); 328 struct serial_device eserial2_device = 329 INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); 330 DECLARE_ESERIAL_FUNCTIONS(3); 331 struct serial_device eserial3_device = 332 INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); 333 DECLARE_ESERIAL_FUNCTIONS(4); 334 struct serial_device eserial4_device = 335 INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); 336 #endif /* CONFIG_SERIAL_MULTI */ 337