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 int eserial##port##_init (void) {\ 96 int clock_divisor; \ 97 clock_divisor = calc_divisor(serial_ports[port-1]); \ 98 NS16550_init(serial_ports[port-1], clock_divisor); \ 99 return(0);}\ 100 void eserial##port##_setbrg (void) {\ 101 serial_setbrg_dev(port);}\ 102 int eserial##port##_getc (void) {\ 103 return serial_getc_dev(port);}\ 104 int eserial##port##_tstc (void) {\ 105 return serial_tstc_dev(port);}\ 106 void eserial##port##_putc (const char c) {\ 107 serial_putc_dev(port, c);}\ 108 void eserial##port##_puts (const char *s) {\ 109 serial_puts_dev(port, s);} 110 111 /* Serial device descriptor */ 112 #define INIT_ESERIAL_STRUCTURE(port, __name) { \ 113 .name = __name, \ 114 .start = eserial##port##_init, \ 115 .stop = NULL, \ 116 .setbrg = eserial##port##_setbrg, \ 117 .getc = eserial##port##_getc, \ 118 .tstc = eserial##port##_tstc, \ 119 .putc = eserial##port##_putc, \ 120 .puts = eserial##port##_puts, \ 121 } 122 123 static int calc_divisor (NS16550_t port) 124 { 125 #ifdef CONFIG_OMAP1510 126 /* If can't cleanly clock 115200 set div to 1 */ 127 if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { 128 port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ 129 return (1); /* return 1 for base divisor */ 130 } 131 port->osc_12m_sel = 0; /* clear if previsouly set */ 132 #endif 133 #ifdef CONFIG_OMAP1610 134 /* If can't cleanly clock 115200 set div to 1 */ 135 if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { 136 return (26); /* return 26 for base divisor */ 137 } 138 #endif 139 140 #ifdef CONFIG_APTIX 141 #define MODE_X_DIV 13 142 #else 143 #define MODE_X_DIV 16 144 #endif 145 146 /* Compute divisor value. Normally, we should simply return: 147 * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate 148 * but we need to round that value by adding 0.5. 149 * Rounding is especially important at high baud rates. 150 */ 151 return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / 152 (MODE_X_DIV * gd->baudrate); 153 } 154 155 void 156 _serial_putc(const char c,const int port) 157 { 158 if (c == '\n') 159 NS16550_putc(PORT, '\r'); 160 161 NS16550_putc(PORT, c); 162 } 163 164 void 165 _serial_putc_raw(const char c,const int port) 166 { 167 NS16550_putc(PORT, c); 168 } 169 170 void 171 _serial_puts (const char *s,const int port) 172 { 173 while (*s) { 174 _serial_putc (*s++,port); 175 } 176 } 177 178 179 int 180 _serial_getc(const int port) 181 { 182 return NS16550_getc(PORT); 183 } 184 185 int 186 _serial_tstc(const int port) 187 { 188 return NS16550_tstc(PORT); 189 } 190 191 void 192 _serial_setbrg (const int port) 193 { 194 int clock_divisor; 195 196 clock_divisor = calc_divisor(PORT); 197 NS16550_reinit(PORT, clock_divisor); 198 } 199 200 static inline void 201 serial_putc_dev(unsigned int dev_index,const char c) 202 { 203 _serial_putc(c,dev_index); 204 } 205 206 static inline void 207 serial_putc_raw_dev(unsigned int dev_index,const char c) 208 { 209 _serial_putc_raw(c,dev_index); 210 } 211 212 static inline void 213 serial_puts_dev(unsigned int dev_index,const char *s) 214 { 215 _serial_puts(s,dev_index); 216 } 217 218 static inline int 219 serial_getc_dev(unsigned int dev_index) 220 { 221 return _serial_getc(dev_index); 222 } 223 224 static inline int 225 serial_tstc_dev(unsigned int dev_index) 226 { 227 return _serial_tstc(dev_index); 228 } 229 230 static inline void 231 serial_setbrg_dev(unsigned int dev_index) 232 { 233 _serial_setbrg(dev_index); 234 } 235 236 DECLARE_ESERIAL_FUNCTIONS(1); 237 struct serial_device eserial1_device = 238 INIT_ESERIAL_STRUCTURE(1, "eserial0"); 239 DECLARE_ESERIAL_FUNCTIONS(2); 240 struct serial_device eserial2_device = 241 INIT_ESERIAL_STRUCTURE(2, "eserial1"); 242 DECLARE_ESERIAL_FUNCTIONS(3); 243 struct serial_device eserial3_device = 244 INIT_ESERIAL_STRUCTURE(3, "eserial2"); 245 DECLARE_ESERIAL_FUNCTIONS(4); 246 struct serial_device eserial4_device = 247 INIT_ESERIAL_STRUCTURE(4, "eserial3"); 248 DECLARE_ESERIAL_FUNCTIONS(5); 249 struct serial_device eserial5_device = 250 INIT_ESERIAL_STRUCTURE(5, "eserial4"); 251 DECLARE_ESERIAL_FUNCTIONS(6); 252 struct serial_device eserial6_device = 253 INIT_ESERIAL_STRUCTURE(6, "eserial5"); 254 255 __weak struct serial_device *default_serial_console(void) 256 { 257 #if CONFIG_CONS_INDEX == 1 258 return &eserial1_device; 259 #elif CONFIG_CONS_INDEX == 2 260 return &eserial2_device; 261 #elif CONFIG_CONS_INDEX == 3 262 return &eserial3_device; 263 #elif CONFIG_CONS_INDEX == 4 264 return &eserial4_device; 265 #elif CONFIG_CONS_INDEX == 5 266 return &eserial5_device; 267 #elif CONFIG_CONS_INDEX == 6 268 return &eserial6_device; 269 #else 270 #error "Bad CONFIG_CONS_INDEX." 271 #endif 272 } 273 274 void ns16550_serial_initialize(void) 275 { 276 #if defined(CONFIG_SYS_NS16550_COM1) 277 serial_register(&eserial1_device); 278 #endif 279 #if defined(CONFIG_SYS_NS16550_COM2) 280 serial_register(&eserial2_device); 281 #endif 282 #if defined(CONFIG_SYS_NS16550_COM3) 283 serial_register(&eserial3_device); 284 #endif 285 #if defined(CONFIG_SYS_NS16550_COM4) 286 serial_register(&eserial4_device); 287 #endif 288 #if defined(CONFIG_SYS_NS16550_COM5) 289 serial_register(&eserial5_device); 290 #endif 291 #if defined(CONFIG_SYS_NS16550_COM6) 292 serial_register(&eserial6_device); 293 #endif 294 } 295