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