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 #include <linux/compiler.h> 26 27 #include <ns16550.h> 28 #ifdef CONFIG_NS87308 29 #include <ns87308.h> 30 #endif 31 32 #include <serial.h> 33 34 #ifndef CONFIG_NS16550_MIN_FUNCTIONS 35 36 DECLARE_GLOBAL_DATA_PTR; 37 38 #if !defined(CONFIG_CONS_INDEX) 39 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6) 40 #error "Invalid console index value." 41 #endif 42 43 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) 44 #error "Console port 1 defined but not configured." 45 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) 46 #error "Console port 2 defined but not configured." 47 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) 48 #error "Console port 3 defined but not configured." 49 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) 50 #error "Console port 4 defined but not configured." 51 #elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5) 52 #error "Console port 5 defined but not configured." 53 #elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6) 54 #error "Console port 6 defined but not configured." 55 #endif 56 57 /* Note: The port number specified in the functions is 1 based. 58 * the array is 0 based. 59 */ 60 static NS16550_t serial_ports[6] = { 61 #ifdef CONFIG_SYS_NS16550_COM1 62 (NS16550_t)CONFIG_SYS_NS16550_COM1, 63 #else 64 NULL, 65 #endif 66 #ifdef CONFIG_SYS_NS16550_COM2 67 (NS16550_t)CONFIG_SYS_NS16550_COM2, 68 #else 69 NULL, 70 #endif 71 #ifdef CONFIG_SYS_NS16550_COM3 72 (NS16550_t)CONFIG_SYS_NS16550_COM3, 73 #else 74 NULL, 75 #endif 76 #ifdef CONFIG_SYS_NS16550_COM4 77 (NS16550_t)CONFIG_SYS_NS16550_COM4, 78 #else 79 NULL, 80 #endif 81 #ifdef CONFIG_SYS_NS16550_COM5 82 (NS16550_t)CONFIG_SYS_NS16550_COM5, 83 #else 84 NULL, 85 #endif 86 #ifdef CONFIG_SYS_NS16550_COM6 87 (NS16550_t)CONFIG_SYS_NS16550_COM6 88 #else 89 NULL 90 #endif 91 }; 92 93 #define PORT serial_ports[port-1] 94 95 /* Multi serial device functions */ 96 #define DECLARE_ESERIAL_FUNCTIONS(port) \ 97 static int eserial##port##_init(void) \ 98 { \ 99 int clock_divisor; \ 100 clock_divisor = calc_divisor(serial_ports[port-1]); \ 101 NS16550_init(serial_ports[port-1], clock_divisor); \ 102 return 0 ; \ 103 } \ 104 static void eserial##port##_setbrg(void) \ 105 { \ 106 serial_setbrg_dev(port); \ 107 } \ 108 static int eserial##port##_getc(void) \ 109 { \ 110 return serial_getc_dev(port); \ 111 } \ 112 static int eserial##port##_tstc(void) \ 113 { \ 114 return serial_tstc_dev(port); \ 115 } \ 116 static void eserial##port##_putc(const char c) \ 117 { \ 118 serial_putc_dev(port, c); \ 119 } \ 120 static void eserial##port##_puts(const char *s) \ 121 { \ 122 serial_puts_dev(port, s); \ 123 } 124 125 /* Serial device descriptor */ 126 #define INIT_ESERIAL_STRUCTURE(port, __name) { \ 127 .name = __name, \ 128 .start = eserial##port##_init, \ 129 .stop = NULL, \ 130 .setbrg = eserial##port##_setbrg, \ 131 .getc = eserial##port##_getc, \ 132 .tstc = eserial##port##_tstc, \ 133 .putc = eserial##port##_putc, \ 134 .puts = eserial##port##_puts, \ 135 } 136 137 static int calc_divisor (NS16550_t port) 138 { 139 #ifdef CONFIG_OMAP1510 140 /* If can't cleanly clock 115200 set div to 1 */ 141 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 142 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 143 return (1); /* return 1 for base divisor */ 144 } 145 port->osc_12m_sel = 0; /* clear if previsouly set */ 146 #endif 147 #ifdef CONFIG_OMAP1610 148 /* If can't cleanly clock 115200 set div to 1 */ 149 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 150 return (26); /* return 26 for base divisor */ 151 } 152 #endif 153 154 #ifdef CONFIG_APTIX 155 #define MODE_X_DIV 13 156 #else 157 #define MODE_X_DIV 16 158 #endif 159 160 /* Compute divisor value. Normally, we should simply return: 161 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 162 * but we need to round that value by adding 0.5. 163 * Rounding is especially important at high baud rates. 164 */ 165 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 166 (MODE_X_DIV * gd->baudrate); 167 } 168 169 void 170 _serial_putc(const char c,const int port) 171 { 172 if (c == '\n') 173 NS16550_putc(PORT, '\r'); 174 175 NS16550_putc(PORT, c); 176 } 177 178 void 179 _serial_putc_raw(const char c,const int port) 180 { 181 NS16550_putc(PORT, c); 182 } 183 184 void 185 _serial_puts (const char *s,const int port) 186 { 187 while (*s) { 188 _serial_putc (*s++,port); 189 } 190 } 191 192 193 int 194 _serial_getc(const int port) 195 { 196 return NS16550_getc(PORT); 197 } 198 199 int 200 _serial_tstc(const int port) 201 { 202 return NS16550_tstc(PORT); 203 } 204 205 void 206 _serial_setbrg (const int port) 207 { 208 int clock_divisor; 209 210 clock_divisor = calc_divisor(PORT); 211 NS16550_reinit(PORT, clock_divisor); 212 } 213 214 static inline void 215 serial_putc_dev(unsigned int dev_index,const char c) 216 { 217 _serial_putc(c,dev_index); 218 } 219 220 static inline void 221 serial_putc_raw_dev(unsigned int dev_index,const char c) 222 { 223 _serial_putc_raw(c,dev_index); 224 } 225 226 static inline void 227 serial_puts_dev(unsigned int dev_index,const char *s) 228 { 229 _serial_puts(s,dev_index); 230 } 231 232 static inline int 233 serial_getc_dev(unsigned int dev_index) 234 { 235 return _serial_getc(dev_index); 236 } 237 238 static inline int 239 serial_tstc_dev(unsigned int dev_index) 240 { 241 return _serial_tstc(dev_index); 242 } 243 244 static inline void 245 serial_setbrg_dev(unsigned int dev_index) 246 { 247 _serial_setbrg(dev_index); 248 } 249 250 #if defined(CONFIG_SYS_NS16550_COM1) 251 DECLARE_ESERIAL_FUNCTIONS(1); 252 struct serial_device eserial1_device = 253 INIT_ESERIAL_STRUCTURE(1, "eserial0"); 254 #endif 255 #if defined(CONFIG_SYS_NS16550_COM2) 256 DECLARE_ESERIAL_FUNCTIONS(2); 257 struct serial_device eserial2_device = 258 INIT_ESERIAL_STRUCTURE(2, "eserial1"); 259 #endif 260 #if defined(CONFIG_SYS_NS16550_COM3) 261 DECLARE_ESERIAL_FUNCTIONS(3); 262 struct serial_device eserial3_device = 263 INIT_ESERIAL_STRUCTURE(3, "eserial2"); 264 #endif 265 #if defined(CONFIG_SYS_NS16550_COM4) 266 DECLARE_ESERIAL_FUNCTIONS(4); 267 struct serial_device eserial4_device = 268 INIT_ESERIAL_STRUCTURE(4, "eserial3"); 269 #endif 270 #if defined(CONFIG_SYS_NS16550_COM5) 271 DECLARE_ESERIAL_FUNCTIONS(5); 272 struct serial_device eserial5_device = 273 INIT_ESERIAL_STRUCTURE(5, "eserial4"); 274 #endif 275 #if defined(CONFIG_SYS_NS16550_COM6) 276 DECLARE_ESERIAL_FUNCTIONS(6); 277 struct serial_device eserial6_device = 278 INIT_ESERIAL_STRUCTURE(6, "eserial5"); 279 #endif 280 281 __weak struct serial_device *default_serial_console(void) 282 { 283 #if CONFIG_CONS_INDEX == 1 284 return &eserial1_device; 285 #elif CONFIG_CONS_INDEX == 2 286 return &eserial2_device; 287 #elif CONFIG_CONS_INDEX == 3 288 return &eserial3_device; 289 #elif CONFIG_CONS_INDEX == 4 290 return &eserial4_device; 291 #elif CONFIG_CONS_INDEX == 5 292 return &eserial5_device; 293 #elif CONFIG_CONS_INDEX == 6 294 return &eserial6_device; 295 #else 296 #error "Bad CONFIG_CONS_INDEX." 297 #endif 298 } 299 300 void ns16550_serial_initialize(void) 301 { 302 #if defined(CONFIG_SYS_NS16550_COM1) 303 serial_register(&eserial1_device); 304 #endif 305 #if defined(CONFIG_SYS_NS16550_COM2) 306 serial_register(&eserial2_device); 307 #endif 308 #if defined(CONFIG_SYS_NS16550_COM3) 309 serial_register(&eserial3_device); 310 #endif 311 #if defined(CONFIG_SYS_NS16550_COM4) 312 serial_register(&eserial4_device); 313 #endif 314 #if defined(CONFIG_SYS_NS16550_COM5) 315 serial_register(&eserial5_device); 316 #endif 317 #if defined(CONFIG_SYS_NS16550_COM6) 318 serial_register(&eserial6_device); 319 #endif 320 } 321 322 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */ 323