common/stdio.c

   1 /*
   2  * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
   3  *
   4  * Changes for multibus/multiadapter I2C support.
   5  *
   6  * (C) Copyright 2000
   7  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include <config.h>
  13 #include <common.h>
  14 #include <errno.h>
  15 #include <stdarg.h>
  16 #include <malloc.h>
  17 #include <stdio_dev.h>
  18 #include <serial.h>
  19 #ifdef CONFIG_LOGBUFFER
  20 #include <logbuff.h>
  21 #endif
  22
  23 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
  24 #include <i2c.h>
  25 #endif
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 static struct stdio_dev devs;
  30 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
  31 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
  32
  33 #if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
  34 #define CONFIG_SYS_DEVICE_NULLDEV       1
  35 #endif
  36
  37 #ifdef  CONFIG_SYS_STDIO_DEREGISTER
  38 #define CONFIG_SYS_DEVICE_NULLDEV       1
  39 #endif
  40
  41 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  42 static void nulldev_putc(struct stdio_dev *dev, const char c)
  43 {
  44         /* nulldev is empty! */
  45 }
  46
  47 static void nulldev_puts(struct stdio_dev *dev, const char *s)
  48 {
  49         /* nulldev is empty! */
  50 }
  51
  52 static int nulldev_input(struct stdio_dev *dev)
  53 {
  54         /* nulldev is empty! */
  55         return 0;
  56 }
  57 #endif
  58
  59 static void stdio_serial_putc(struct stdio_dev *dev, const char c)
  60 {
  61         serial_putc(c);
  62 }
  63
  64 static void stdio_serial_puts(struct stdio_dev *dev, const char *s)
  65 {
  66         serial_puts(s);
  67 }
  68
  69 static int stdio_serial_getc(struct stdio_dev *dev)
  70 {
  71         return serial_getc();
  72 }
  73
  74 static int stdio_serial_tstc(struct stdio_dev *dev)
  75 {
  76         return serial_tstc();
  77 }
  78
  79 /**************************************************************************
  80  * SYSTEM DRIVERS
  81  **************************************************************************
  82  */
  83
  84 static void drv_system_init (void)
  85 {
  86         struct stdio_dev dev;
  87
  88         memset (&dev, 0, sizeof (dev));
  89
  90         strcpy (dev.name, "serial");
  91         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  92         dev.putc = stdio_serial_putc;
  93         dev.puts = stdio_serial_puts;
  94         dev.getc = stdio_serial_getc;
  95         dev.tstc = stdio_serial_tstc;
  96         stdio_register (&dev);
  97
  98 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  99         memset (&dev, 0, sizeof (dev));
 100
 101         strcpy (dev.name, "nulldev");
 102         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
 103         dev.putc = nulldev_putc;
 104         dev.puts = nulldev_puts;
 105         dev.getc = nulldev_input;
 106         dev.tstc = nulldev_input;
 107
 108         stdio_register (&dev);
 109 #endif
 110 }
 111
 112 /**************************************************************************
 113  * DEVICES
 114  **************************************************************************
 115  */
 116 struct list_head* stdio_get_list(void)
 117 {
 118         return &(devs.list);
 119 }
 120
 121 struct stdio_dev* stdio_get_by_name(const char *name)
 122 {
 123         struct list_head *pos;
 124         struct stdio_dev *dev;
 125
 126         if(!name)
 127                 return NULL;
 128
 129         list_for_each(pos, &(devs.list)) {
 130                 dev = list_entry(pos, struct stdio_dev, list);
 131                 if(strcmp(dev->name, name) == 0)
 132                         return dev;
 133         }
 134
 135         return NULL;
 136 }
 137
 138 struct stdio_dev* stdio_clone(struct stdio_dev *dev)
 139 {
 140         struct stdio_dev *_dev;
 141
 142         if(!dev)
 143                 return NULL;
 144
 145         _dev = calloc(1, sizeof(struct stdio_dev));
 146
 147         if(!_dev)
 148                 return NULL;
 149
 150         memcpy(_dev, dev, sizeof(struct stdio_dev));
 151
 152         return _dev;
 153 }
 154
 155 int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp)
 156 {
 157         struct stdio_dev *_dev;
 158
 159         _dev = stdio_clone(dev);
 160         if(!_dev)
 161                 return -ENODEV;
 162         list_add_tail(&(_dev->list), &(devs.list));
 163         if (devp)
 164                 *devp = _dev;
 165
 166         return 0;
 167 }
 168
 169 int stdio_register(struct stdio_dev *dev)
 170 {
 171         return stdio_register_dev(dev, NULL);
 172 }
 173
 174 /* deregister the device "devname".
 175  * returns 0 if success, -1 if device is assigned and 1 if devname not found
 176  */
 177 #ifdef  CONFIG_SYS_STDIO_DEREGISTER
 178 int stdio_deregister_dev(struct stdio_dev *dev, int force)
 179 {
 180         int l;
 181         struct list_head *pos;
 182         char temp_names[3][16];
 183
 184         /* get stdio devices (ListRemoveItem changes the dev list) */
 185         for (l=0 ; l< MAX_FILES; l++) {
 186                 if (stdio_devices[l] == dev) {
 187                         if (force) {
 188                                 strcpy(temp_names[l], "nulldev");
 189                                 continue;
 190                         }
 191                         /* Device is assigned -> report error */
 192                         return -1;
 193                 }
 194                 memcpy (&temp_names[l][0],
 195                         stdio_devices[l]->name,
 196                         sizeof(temp_names[l]));
 197         }
 198
 199         list_del(&(dev->list));
 200         free(dev);
 201
 202         /* reassign Device list */
 203         list_for_each(pos, &(devs.list)) {
 204                 dev = list_entry(pos, struct stdio_dev, list);
 205                 for (l=0 ; l< MAX_FILES; l++) {
 206                         if(strcmp(dev->name, temp_names[l]) == 0)
 207                                 stdio_devices[l] = dev;
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 int stdio_deregister(const char *devname, int force)
 214 {
 215         struct stdio_dev *dev;
 216
 217         dev = stdio_get_by_name(devname);
 218
 219         if (!dev) /* device not found */
 220                 return -ENODEV;
 221
 222         return stdio_deregister_dev(dev, force);
 223 }
 224 #endif  /* CONFIG_SYS_STDIO_DEREGISTER */
 225
 226 int stdio_init_tables(void)
 227 {
 228 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 229         /* already relocated for current ARM implementation */
 230         ulong relocation_offset = gd->reloc_off;
 231         int i;
 232
 233         /* relocate device name pointers */
 234         for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
 235                 stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
 236                                                 relocation_offset);
 237         }
 238 #endif /* CONFIG_NEEDS_MANUAL_RELOC */
 239
 240         /* Initialize the list */
 241         INIT_LIST_HEAD(&(devs.list));
 242
 243         return 0;
 244 }
 245
 246 int stdio_add_devices(void)
 247 {
 248 #ifdef CONFIG_SYS_I2C
 249         i2c_init_all();
 250 #else
 251 #if defined(CONFIG_HARD_I2C)
 252         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 253 #endif
 254 #endif
 255 #ifdef CONFIG_LCD
 256         drv_lcd_init ();
 257 #endif
 258 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 259         drv_video_init ();
 260 #endif
 261 #ifdef CONFIG_KEYBOARD
 262         drv_keyboard_init ();
 263 #endif
 264 #ifdef CONFIG_LOGBUFFER
 265         drv_logbuff_init ();
 266 #endif
 267         drv_system_init ();
 268         serial_stdio_init ();
 269 #ifdef CONFIG_USB_TTY
 270         drv_usbtty_init ();
 271 #endif
 272 #ifdef CONFIG_NETCONSOLE
 273         drv_nc_init ();
 274 #endif
 275 #ifdef CONFIG_JTAG_CONSOLE
 276         drv_jtag_console_init ();
 277 #endif
 278 #ifdef CONFIG_CBMEM_CONSOLE
 279         cbmemc_init();
 280 #endif
 281
 282         return 0;
 283 }
 284
 285 int stdio_init(void)
 286 {
 287         stdio_init_tables();
 288         stdio_add_devices();
 289
 290         return 0;
 291 }