common/stdio.c

   1 /*
   2  * (C) Copyright 2000
   3  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   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 <config.h>
  25 #include <common.h>
  26 #include <stdarg.h>
  27 #include <malloc.h>
  28 #include <stdio_dev.h>
  29 #include <serial.h>
  30 #ifdef CONFIG_LOGBUFFER
  31 #include <logbuff.h>
  32 #endif
  33 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
  34 #include <i2c.h>
  35 #endif
  36
  37 DECLARE_GLOBAL_DATA_PTR;
  38
  39 static struct stdio_dev devs;
  40 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
  41 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
  42
  43 #if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
  44 #define CONFIG_SYS_DEVICE_NULLDEV       1
  45 #endif
  46
  47
  48 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  49 void nulldev_putc(const char c)
  50 {
  51         /* nulldev is empty! */
  52 }
  53
  54 void nulldev_puts(const char *s)
  55 {
  56         /* nulldev is empty! */
  57 }
  58
  59 int nulldev_input(void)
  60 {
  61         /* nulldev is empty! */
  62         return 0;
  63 }
  64 #endif
  65
  66 /**************************************************************************
  67  * SYSTEM DRIVERS
  68  **************************************************************************
  69  */
  70
  71 static void drv_system_init (void)
  72 {
  73         struct stdio_dev dev;
  74
  75         memset (&dev, 0, sizeof (dev));
  76
  77         strcpy (dev.name, "serial");
  78         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  79 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
  80         dev.putc = serial_buffered_putc;
  81         dev.puts = serial_buffered_puts;
  82         dev.getc = serial_buffered_getc;
  83         dev.tstc = serial_buffered_tstc;
  84 #else
  85         dev.putc = serial_putc;
  86         dev.puts = serial_puts;
  87         dev.getc = serial_getc;
  88         dev.tstc = serial_tstc;
  89 #endif
  90
  91         stdio_register (&dev);
  92
  93 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  94         memset (&dev, 0, sizeof (dev));
  95
  96         strcpy (dev.name, "nulldev");
  97         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  98         dev.putc = nulldev_putc;
  99         dev.puts = nulldev_puts;
 100         dev.getc = nulldev_input;
 101         dev.tstc = nulldev_input;
 102
 103         stdio_register (&dev);
 104 #endif
 105 }
 106
 107 /**************************************************************************
 108  * DEVICES
 109  **************************************************************************
 110  */
 111 struct list_head* stdio_get_list(void)
 112 {
 113         return &(devs.list);
 114 }
 115
 116 struct stdio_dev* stdio_get_by_name(char* name)
 117 {
 118         struct list_head *pos;
 119         struct stdio_dev *dev;
 120
 121         if(!name)
 122                 return NULL;
 123
 124         list_for_each(pos, &(devs.list)) {
 125                 dev = list_entry(pos, struct stdio_dev, list);
 126                 if(strcmp(dev->name, name) == 0)
 127                         return dev;
 128         }
 129
 130         return NULL;
 131 }
 132
 133 struct stdio_dev* stdio_clone(struct stdio_dev *dev)
 134 {
 135         struct stdio_dev *_dev;
 136
 137         if(!dev)
 138                 return NULL;
 139
 140         _dev = calloc(1, sizeof(struct stdio_dev));
 141
 142         if(!_dev)
 143                 return NULL;
 144
 145         memcpy(_dev, dev, sizeof(struct stdio_dev));
 146         strncpy(_dev->name, dev->name, 16);
 147
 148         return _dev;
 149 }
 150
 151 int stdio_register (struct stdio_dev * dev)
 152 {
 153         struct stdio_dev *_dev;
 154
 155         _dev = stdio_clone(dev);
 156         if(!_dev)
 157                 return -1;
 158         list_add_tail(&(_dev->list), &(devs.list));
 159         return 0;
 160 }
 161
 162 /* deregister the device "devname".
 163  * returns 0 if success, -1 if device is assigned and 1 if devname not found
 164  */
 165 #ifdef  CONFIG_SYS_STDIO_DEREGISTER
 166 int stdio_deregister(char *devname)
 167 {
 168         int l;
 169         struct list_head *pos;
 170         struct stdio_dev *dev;
 171         char temp_names[3][8];
 172
 173         dev = stdio_get_by_name(devname);
 174
 175         if(!dev) /* device not found */
 176                 return -1;
 177         /* get stdio devices (ListRemoveItem changes the dev list) */
 178         for (l=0 ; l< MAX_FILES; l++) {
 179                 if (stdio_devices[l] == dev) {
 180                         /* Device is assigned -> report error */
 181                         return -1;
 182                 }
 183                 memcpy (&temp_names[l][0],
 184                         stdio_devices[l]->name,
 185                         sizeof(stdio_devices[l]->name));
 186         }
 187
 188         list_del(&(dev->list));
 189
 190         /* reassign Device list */
 191         list_for_each(pos, &(devs.list)) {
 192                 dev = list_entry(pos, struct stdio_dev, list);
 193                 for (l=0 ; l< MAX_FILES; l++) {
 194                         if(strcmp(dev->name, temp_names[l]) == 0)
 195                                 stdio_devices[l] = dev;
 196                 }
 197         }
 198         return 0;
 199 }
 200 #endif  /* CONFIG_SYS_STDIO_DEREGISTER */
 201
 202 int stdio_init (void)
 203 {
 204 #ifndef CONFIG_ARM      /* already relocated for current ARM implementation */
 205         ulong relocation_offset = gd->reloc_off;
 206         int i;
 207
 208         /* relocate device name pointers */
 209         for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
 210                 stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
 211                                                 relocation_offset);
 212         }
 213 #endif
 214
 215         /* Initialize the list */
 216         INIT_LIST_HEAD(&(devs.list));
 217
 218 #ifdef CONFIG_ARM_DCC_MULTI
 219         drv_arm_dcc_init ();
 220 #endif
 221 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 222         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 223 #endif
 224 #ifdef CONFIG_LCD
 225         drv_lcd_init ();
 226 #endif
 227 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 228         drv_video_init ();
 229 #endif
 230 #ifdef CONFIG_KEYBOARD
 231         drv_keyboard_init ();
 232 #endif
 233 #ifdef CONFIG_LOGBUFFER
 234         drv_logbuff_init ();
 235 #endif
 236         drv_system_init ();
 237 #ifdef CONFIG_SERIAL_MULTI
 238         serial_stdio_init ();
 239 #endif
 240 #ifdef CONFIG_USB_TTY
 241         drv_usbtty_init ();
 242 #endif
 243 #ifdef CONFIG_NETCONSOLE
 244         drv_nc_init ();
 245 #endif
 246 #ifdef CONFIG_JTAG_CONSOLE
 247         drv_jtag_console_init ();
 248 #endif
 249
 250         return (0);
 251 }