drivers/serial/serial_ns16550.c

   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 = ns16550_calc_divisor(serial_ports[port-1], \
  85                                 CONFIG_SYS_NS16550_CLK, gd->baudrate); \
  86                 NS16550_init(serial_ports[port-1], clock_divisor); \
  87                 return 0 ; \
  88         } \
  89         static void eserial##port##_setbrg(void) \
  90         { \
  91                 serial_setbrg_dev(port); \
  92         } \
  93         static int  eserial##port##_getc(void) \
  94         { \
  95                 return serial_getc_dev(port); \
  96         } \
  97         static int  eserial##port##_tstc(void) \
  98         { \
  99                 return serial_tstc_dev(port); \
 100         } \
 101         static void eserial##port##_putc(const char c) \
 102         { \
 103                 serial_putc_dev(port, c); \
 104         } \
 105         static void eserial##port##_puts(const char *s) \
 106         { \
 107                 serial_puts_dev(port, s); \
 108         }
 109
 110 /* Serial device descriptor */
 111 #define INIT_ESERIAL_STRUCTURE(port, __name) {  \
 112         .name   = __name,                       \
 113         .start  = eserial##port##_init,         \
 114         .stop   = NULL,                         \
 115         .setbrg = eserial##port##_setbrg,       \
 116         .getc   = eserial##port##_getc,         \
 117         .tstc   = eserial##port##_tstc,         \
 118         .putc   = eserial##port##_putc,         \
 119         .puts   = eserial##port##_puts,         \
 120 }
 121
 122 static void _serial_putc(const char c, const int port)
 123 {
 124         if (c == '\n')
 125                 NS16550_putc(PORT, '\r');
 126
 127         NS16550_putc(PORT, c);
 128 }
 129
 130 static void _serial_putc_raw(const char c, const int port)
 131 {
 132         NS16550_putc(PORT, c);
 133 }
 134
 135 static void _serial_puts(const char *s, const int port)
 136 {
 137         while (*s) {
 138                 _serial_putc(*s++, port);
 139         }
 140 }
 141
 142 static int _serial_getc(const int port)
 143 {
 144         return NS16550_getc(PORT);
 145 }
 146
 147 static int _serial_tstc(const int port)
 148 {
 149         return NS16550_tstc(PORT);
 150 }
 151
 152 static void _serial_setbrg(const int port)
 153 {
 154         int clock_divisor;
 155
 156         clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
 157                                              gd->baudrate);
 158         NS16550_reinit(PORT, clock_divisor);
 159 }
 160
 161 static inline void
 162 serial_putc_dev(unsigned int dev_index,const char c)
 163 {
 164         _serial_putc(c,dev_index);
 165 }
 166
 167 static inline void
 168 serial_putc_raw_dev(unsigned int dev_index,const char c)
 169 {
 170         _serial_putc_raw(c,dev_index);
 171 }
 172
 173 static inline void
 174 serial_puts_dev(unsigned int dev_index,const char *s)
 175 {
 176         _serial_puts(s,dev_index);
 177 }
 178
 179 static inline int
 180 serial_getc_dev(unsigned int dev_index)
 181 {
 182         return _serial_getc(dev_index);
 183 }
 184
 185 static inline int
 186 serial_tstc_dev(unsigned int dev_index)
 187 {
 188         return _serial_tstc(dev_index);
 189 }
 190
 191 static inline void
 192 serial_setbrg_dev(unsigned int dev_index)
 193 {
 194         _serial_setbrg(dev_index);
 195 }
 196
 197 #if defined(CONFIG_SYS_NS16550_COM1)
 198 DECLARE_ESERIAL_FUNCTIONS(1);
 199 struct serial_device eserial1_device =
 200         INIT_ESERIAL_STRUCTURE(1, "eserial0");
 201 #endif
 202 #if defined(CONFIG_SYS_NS16550_COM2)
 203 DECLARE_ESERIAL_FUNCTIONS(2);
 204 struct serial_device eserial2_device =
 205         INIT_ESERIAL_STRUCTURE(2, "eserial1");
 206 #endif
 207 #if defined(CONFIG_SYS_NS16550_COM3)
 208 DECLARE_ESERIAL_FUNCTIONS(3);
 209 struct serial_device eserial3_device =
 210         INIT_ESERIAL_STRUCTURE(3, "eserial2");
 211 #endif
 212 #if defined(CONFIG_SYS_NS16550_COM4)
 213 DECLARE_ESERIAL_FUNCTIONS(4);
 214 struct serial_device eserial4_device =
 215         INIT_ESERIAL_STRUCTURE(4, "eserial3");
 216 #endif
 217 #if defined(CONFIG_SYS_NS16550_COM5)
 218 DECLARE_ESERIAL_FUNCTIONS(5);
 219 struct serial_device eserial5_device =
 220         INIT_ESERIAL_STRUCTURE(5, "eserial4");
 221 #endif
 222 #if defined(CONFIG_SYS_NS16550_COM6)
 223 DECLARE_ESERIAL_FUNCTIONS(6);
 224 struct serial_device eserial6_device =
 225         INIT_ESERIAL_STRUCTURE(6, "eserial5");
 226 #endif
 227
 228 __weak struct serial_device *default_serial_console(void)
 229 {
 230 #if CONFIG_CONS_INDEX == 1
 231         return &eserial1_device;
 232 #elif CONFIG_CONS_INDEX == 2
 233         return &eserial2_device;
 234 #elif CONFIG_CONS_INDEX == 3
 235         return &eserial3_device;
 236 #elif CONFIG_CONS_INDEX == 4
 237         return &eserial4_device;
 238 #elif CONFIG_CONS_INDEX == 5
 239         return &eserial5_device;
 240 #elif CONFIG_CONS_INDEX == 6
 241         return &eserial6_device;
 242 #else
 243 #error "Bad CONFIG_CONS_INDEX."
 244 #endif
 245 }
 246
 247 void ns16550_serial_initialize(void)
 248 {
 249 #if defined(CONFIG_SYS_NS16550_COM1)
 250         serial_register(&eserial1_device);
 251 #endif
 252 #if defined(CONFIG_SYS_NS16550_COM2)
 253         serial_register(&eserial2_device);
 254 #endif
 255 #if defined(CONFIG_SYS_NS16550_COM3)
 256         serial_register(&eserial3_device);
 257 #endif
 258 #if defined(CONFIG_SYS_NS16550_COM4)
 259         serial_register(&eserial4_device);
 260 #endif
 261 #if defined(CONFIG_SYS_NS16550_COM5)
 262         serial_register(&eserial5_device);
 263 #endif
 264 #if defined(CONFIG_SYS_NS16550_COM6)
 265         serial_register(&eserial6_device);
 266 #endif
 267 }
 268
 269 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */