1 /* 2 * (C) Copyright 2000 3 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <linux/compiler.h> 10 11 #include <ns16550.h> 12 #ifdef CONFIG_NS87308 13 #include <ns87308.h> 14 #endif 15 16 #include <serial.h> 17 18 #ifndef CONFIG_NS16550_MIN_FUNCTIONS 19 20 DECLARE_GLOBAL_DATA_PTR; 21 22 #if !defined(CONFIG_CONS_INDEX) 23 #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6) 24 #error "Invalid console index value." 25 #endif 26 27 #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) 28 #error "Console port 1 defined but not configured." 29 #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) 30 #error "Console port 2 defined but not configured." 31 #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) 32 #error "Console port 3 defined but not configured." 33 #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) 34 #error "Console port 4 defined but not configured." 35 #elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5) 36 #error "Console port 5 defined but not configured." 37 #elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6) 38 #error "Console port 6 defined but not configured." 39 #endif 40 41 /* Note: The port number specified in the functions is 1 based. 42 * the array is 0 based. 43 */ 44 static NS16550_t serial_ports[6] = { 45 #ifdef CONFIG_SYS_NS16550_COM1 46 (NS16550_t)CONFIG_SYS_NS16550_COM1, 47 #else 48 NULL, 49 #endif 50 #ifdef CONFIG_SYS_NS16550_COM2 51 (NS16550_t)CONFIG_SYS_NS16550_COM2, 52 #else 53 NULL, 54 #endif 55 #ifdef CONFIG_SYS_NS16550_COM3 56 (NS16550_t)CONFIG_SYS_NS16550_COM3, 57 #else 58 NULL, 59 #endif 60 #ifdef CONFIG_SYS_NS16550_COM4 61 (NS16550_t)CONFIG_SYS_NS16550_COM4, 62 #else 63 NULL, 64 #endif 65 #ifdef CONFIG_SYS_NS16550_COM5 66 (NS16550_t)CONFIG_SYS_NS16550_COM5, 67 #else 68 NULL, 69 #endif 70 #ifdef CONFIG_SYS_NS16550_COM6 71 (NS16550_t)CONFIG_SYS_NS16550_COM6 72 #else 73 NULL 74 #endif 75 }; 76 77 #define PORT serial_ports[port-1] 78 79 /* Multi serial device functions */ 80 #define DECLARE_ESERIAL_FUNCTIONS(port) \ 81 static int eserial##port##_init(void) \ 82 { \ 83 int clock_divisor; \ 84 clock_divisor = calc_divisor(serial_ports[port-1]); \ 85 NS16550_init(serial_ports[port-1], clock_divisor); \ 86 return 0 ; \ 87 } \ 88 static void eserial##port##_setbrg(void) \ 89 { \ 90 serial_setbrg_dev(port); \ 91 } \ 92 static int eserial##port##_getc(void) \ 93 { \ 94 return serial_getc_dev(port); \ 95 } \ 96 static int eserial##port##_tstc(void) \ 97 { \ 98 return serial_tstc_dev(port); \ 99 } \ 100 static void eserial##port##_putc(const char c) \ 101 { \ 102 serial_putc_dev(port, c); \ 103 } \ 104 static void eserial##port##_puts(const char *s) \ 105 { \ 106 serial_puts_dev(port, s); \ 107 } 108 109 /* Serial device descriptor */ 110 #define INIT_ESERIAL_STRUCTURE(port, __name) { \ 111 .name = __name, \ 112 .start = eserial##port##_init, \ 113 .stop = NULL, \ 114 .setbrg = eserial##port##_setbrg, \ 115 .getc = eserial##port##_getc, \ 116 .tstc = eserial##port##_tstc, \ 117 .putc = eserial##port##_putc, \ 118 .puts = eserial##port##_puts, \ 119 } 120 121 static int calc_divisor (NS16550_t port) 122 { 123 const unsigned int mode_x_div = 16; 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 133 134 return DIV_ROUND_CLOSEST(CONFIG_SYS_NS16550_CLK, 135 mode_x_div * gd->baudrate); 136 } 137 138 void 139 _serial_putc(const char c,const int port) 140 { 141 if (c == '\n') 142 NS16550_putc(PORT, '\r'); 143 144 NS16550_putc(PORT, c); 145 } 146 147 void 148 _serial_putc_raw(const char c,const int port) 149 { 150 NS16550_putc(PORT, c); 151 } 152 153 void 154 _serial_puts (const char *s,const int port) 155 { 156 while (*s) { 157 _serial_putc (*s++,port); 158 } 159 } 160 161 162 int 163 _serial_getc(const int port) 164 { 165 return NS16550_getc(PORT); 166 } 167 168 int 169 _serial_tstc(const int port) 170 { 171 return NS16550_tstc(PORT); 172 } 173 174 void 175 _serial_setbrg (const int port) 176 { 177 int clock_divisor; 178 179 clock_divisor = calc_divisor(PORT); 180 NS16550_reinit(PORT, clock_divisor); 181 } 182 183 static inline void 184 serial_putc_dev(unsigned int dev_index,const char c) 185 { 186 _serial_putc(c,dev_index); 187 } 188 189 static inline void 190 serial_putc_raw_dev(unsigned int dev_index,const char c) 191 { 192 _serial_putc_raw(c,dev_index); 193 } 194 195 static inline void 196 serial_puts_dev(unsigned int dev_index,const char *s) 197 { 198 _serial_puts(s,dev_index); 199 } 200 201 static inline int 202 serial_getc_dev(unsigned int dev_index) 203 { 204 return _serial_getc(dev_index); 205 } 206 207 static inline int 208 serial_tstc_dev(unsigned int dev_index) 209 { 210 return _serial_tstc(dev_index); 211 } 212 213 static inline void 214 serial_setbrg_dev(unsigned int dev_index) 215 { 216 _serial_setbrg(dev_index); 217 } 218 219 #if defined(CONFIG_SYS_NS16550_COM1) 220 DECLARE_ESERIAL_FUNCTIONS(1); 221 struct serial_device eserial1_device = 222 INIT_ESERIAL_STRUCTURE(1, "eserial0"); 223 #endif 224 #if defined(CONFIG_SYS_NS16550_COM2) 225 DECLARE_ESERIAL_FUNCTIONS(2); 226 struct serial_device eserial2_device = 227 INIT_ESERIAL_STRUCTURE(2, "eserial1"); 228 #endif 229 #if defined(CONFIG_SYS_NS16550_COM3) 230 DECLARE_ESERIAL_FUNCTIONS(3); 231 struct serial_device eserial3_device = 232 INIT_ESERIAL_STRUCTURE(3, "eserial2"); 233 #endif 234 #if defined(CONFIG_SYS_NS16550_COM4) 235 DECLARE_ESERIAL_FUNCTIONS(4); 236 struct serial_device eserial4_device = 237 INIT_ESERIAL_STRUCTURE(4, "eserial3"); 238 #endif 239 #if defined(CONFIG_SYS_NS16550_COM5) 240 DECLARE_ESERIAL_FUNCTIONS(5); 241 struct serial_device eserial5_device = 242 INIT_ESERIAL_STRUCTURE(5, "eserial4"); 243 #endif 244 #if defined(CONFIG_SYS_NS16550_COM6) 245 DECLARE_ESERIAL_FUNCTIONS(6); 246 struct serial_device eserial6_device = 247 INIT_ESERIAL_STRUCTURE(6, "eserial5"); 248 #endif 249 250 __weak struct serial_device *default_serial_console(void) 251 { 252 #if CONFIG_CONS_INDEX == 1 253 return &eserial1_device; 254 #elif CONFIG_CONS_INDEX == 2 255 return &eserial2_device; 256 #elif CONFIG_CONS_INDEX == 3 257 return &eserial3_device; 258 #elif CONFIG_CONS_INDEX == 4 259 return &eserial4_device; 260 #elif CONFIG_CONS_INDEX == 5 261 return &eserial5_device; 262 #elif CONFIG_CONS_INDEX == 6 263 return &eserial6_device; 264 #else 265 #error "Bad CONFIG_CONS_INDEX." 266 #endif 267 } 268 269 void ns16550_serial_initialize(void) 270 { 271 #if defined(CONFIG_SYS_NS16550_COM1) 272 serial_register(&eserial1_device); 273 #endif 274 #if defined(CONFIG_SYS_NS16550_COM2) 275 serial_register(&eserial2_device); 276 #endif 277 #if defined(CONFIG_SYS_NS16550_COM3) 278 serial_register(&eserial3_device); 279 #endif 280 #if defined(CONFIG_SYS_NS16550_COM4) 281 serial_register(&eserial4_device); 282 #endif 283 #if defined(CONFIG_SYS_NS16550_COM5) 284 serial_register(&eserial5_device); 285 #endif 286 #if defined(CONFIG_SYS_NS16550_COM6) 287 serial_register(&eserial6_device); 288 #endif 289 } 290 291 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */ 292