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_puts(const char *s, const int port)
 131 {
 132         while (*s) {
 133                 _serial_putc(*s++, port);
 134         }
 135 }
 136
 137 static int _serial_getc(const int port)
 138 {
 139         return NS16550_getc(PORT);
 140 }
 141
 142 static int _serial_tstc(const int port)
 143 {
 144         return NS16550_tstc(PORT);
 145 }
 146
 147 static void _serial_setbrg(const int port)
 148 {
 149         int clock_divisor;
 150
 151         clock_divisor = ns16550_calc_divisor(PORT, CONFIG_SYS_NS16550_CLK,
 152                                              gd->baudrate);
 153         NS16550_reinit(PORT, clock_divisor);
 154 }
 155
 156 static inline void
 157 serial_putc_dev(unsigned int dev_index,const char c)
 158 {
 159         _serial_putc(c,dev_index);
 160 }
 161
 162 static inline void
 163 serial_puts_dev(unsigned int dev_index,const char *s)
 164 {
 165         _serial_puts(s,dev_index);
 166 }
 167
 168 static inline int
 169 serial_getc_dev(unsigned int dev_index)
 170 {
 171         return _serial_getc(dev_index);
 172 }
 173
 174 static inline int
 175 serial_tstc_dev(unsigned int dev_index)
 176 {
 177         return _serial_tstc(dev_index);
 178 }
 179
 180 static inline void
 181 serial_setbrg_dev(unsigned int dev_index)
 182 {
 183         _serial_setbrg(dev_index);
 184 }
 185
 186 #if defined(CONFIG_SYS_NS16550_COM1)
 187 DECLARE_ESERIAL_FUNCTIONS(1);
 188 struct serial_device eserial1_device =
 189         INIT_ESERIAL_STRUCTURE(1, "eserial0");
 190 #endif
 191 #if defined(CONFIG_SYS_NS16550_COM2)
 192 DECLARE_ESERIAL_FUNCTIONS(2);
 193 struct serial_device eserial2_device =
 194         INIT_ESERIAL_STRUCTURE(2, "eserial1");
 195 #endif
 196 #if defined(CONFIG_SYS_NS16550_COM3)
 197 DECLARE_ESERIAL_FUNCTIONS(3);
 198 struct serial_device eserial3_device =
 199         INIT_ESERIAL_STRUCTURE(3, "eserial2");
 200 #endif
 201 #if defined(CONFIG_SYS_NS16550_COM4)
 202 DECLARE_ESERIAL_FUNCTIONS(4);
 203 struct serial_device eserial4_device =
 204         INIT_ESERIAL_STRUCTURE(4, "eserial3");
 205 #endif
 206 #if defined(CONFIG_SYS_NS16550_COM5)
 207 DECLARE_ESERIAL_FUNCTIONS(5);
 208 struct serial_device eserial5_device =
 209         INIT_ESERIAL_STRUCTURE(5, "eserial4");
 210 #endif
 211 #if defined(CONFIG_SYS_NS16550_COM6)
 212 DECLARE_ESERIAL_FUNCTIONS(6);
 213 struct serial_device eserial6_device =
 214         INIT_ESERIAL_STRUCTURE(6, "eserial5");
 215 #endif
 216
 217 __weak struct serial_device *default_serial_console(void)
 218 {
 219 #if CONFIG_CONS_INDEX == 1
 220         return &eserial1_device;
 221 #elif CONFIG_CONS_INDEX == 2
 222         return &eserial2_device;
 223 #elif CONFIG_CONS_INDEX == 3
 224         return &eserial3_device;
 225 #elif CONFIG_CONS_INDEX == 4
 226         return &eserial4_device;
 227 #elif CONFIG_CONS_INDEX == 5
 228         return &eserial5_device;
 229 #elif CONFIG_CONS_INDEX == 6
 230         return &eserial6_device;
 231 #else
 232 #error "Bad CONFIG_CONS_INDEX."
 233 #endif
 234 }
 235
 236 void ns16550_serial_initialize(void)
 237 {
 238 #if defined(CONFIG_SYS_NS16550_COM1)
 239         serial_register(&eserial1_device);
 240 #endif
 241 #if defined(CONFIG_SYS_NS16550_COM2)
 242         serial_register(&eserial2_device);
 243 #endif
 244 #if defined(CONFIG_SYS_NS16550_COM3)
 245         serial_register(&eserial3_device);
 246 #endif
 247 #if defined(CONFIG_SYS_NS16550_COM4)
 248         serial_register(&eserial4_device);
 249 #endif
 250 #if defined(CONFIG_SYS_NS16550_COM5)
 251         serial_register(&eserial5_device);
 252 #endif
 253 #if defined(CONFIG_SYS_NS16550_COM6)
 254         serial_register(&eserial6_device);
 255 #endif
 256 }
 257
 258 #endif /* !CONFIG_NS16550_MIN_FUNCTIONS */