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         dev.putc = serial_putc;
  80         dev.puts = serial_puts;
  81         dev.getc = serial_getc;
  82         dev.tstc = serial_tstc;
  83         stdio_register (&dev);
  84
  85 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  86         memset (&dev, 0, sizeof (dev));
  87
  88         strcpy (dev.name, "nulldev");
  89         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  90         dev.putc = nulldev_putc;
  91         dev.puts = nulldev_puts;
  92         dev.getc = nulldev_input;
  93         dev.tstc = nulldev_input;
  94
  95         stdio_register (&dev);
  96 #endif
  97 }
  98
  99 /**************************************************************************
 100  * DEVICES
 101  **************************************************************************
 102  */
 103 struct list_head* stdio_get_list(void)
 104 {
 105         return &(devs.list);
 106 }
 107
 108 struct stdio_dev* stdio_get_by_name(const char *name)
 109 {
 110         struct list_head *pos;
 111         struct stdio_dev *dev;
 112
 113         if(!name)
 114                 return NULL;
 115
 116         list_for_each(pos, &(devs.list)) {
 117                 dev = list_entry(pos, struct stdio_dev, list);
 118                 if(strcmp(dev->name, name) == 0)
 119                         return dev;
 120         }
 121
 122         return NULL;
 123 }
 124
 125 struct stdio_dev* stdio_clone(struct stdio_dev *dev)
 126 {
 127         struct stdio_dev *_dev;
 128
 129         if(!dev)
 130                 return NULL;
 131
 132         _dev = calloc(1, sizeof(struct stdio_dev));
 133
 134         if(!_dev)
 135                 return NULL;
 136
 137         memcpy(_dev, dev, sizeof(struct stdio_dev));
 138         strncpy(_dev->name, dev->name, 16);
 139
 140         return _dev;
 141 }
 142
 143 int stdio_register (struct stdio_dev * dev)
 144 {
 145         struct stdio_dev *_dev;
 146
 147         _dev = stdio_clone(dev);
 148         if(!_dev)
 149                 return -1;
 150         list_add_tail(&(_dev->list), &(devs.list));
 151         return 0;
 152 }
 153
 154 /* deregister the device "devname".
 155  * returns 0 if success, -1 if device is assigned and 1 if devname not found
 156  */
 157 #ifdef  CONFIG_SYS_STDIO_DEREGISTER
 158 int stdio_deregister(const char *devname)
 159 {
 160         int l;
 161         struct list_head *pos;
 162         struct stdio_dev *dev;
 163         char temp_names[3][16];
 164
 165         dev = stdio_get_by_name(devname);
 166
 167         if(!dev) /* device not found */
 168                 return -1;
 169         /* get stdio devices (ListRemoveItem changes the dev list) */
 170         for (l=0 ; l< MAX_FILES; l++) {
 171                 if (stdio_devices[l] == dev) {
 172                         /* Device is assigned -> report error */
 173                         return -1;
 174                 }
 175                 memcpy (&temp_names[l][0],
 176                         stdio_devices[l]->name,
 177                         sizeof(temp_names[l]));
 178         }
 179
 180         list_del(&(dev->list));
 181
 182         /* reassign Device list */
 183         list_for_each(pos, &(devs.list)) {
 184                 dev = list_entry(pos, struct stdio_dev, list);
 185                 for (l=0 ; l< MAX_FILES; l++) {
 186                         if(strcmp(dev->name, temp_names[l]) == 0)
 187                                 stdio_devices[l] = dev;
 188                 }
 189         }
 190         return 0;
 191 }
 192 #endif  /* CONFIG_SYS_STDIO_DEREGISTER */
 193
 194 int stdio_init (void)
 195 {
 196 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 197         /* already relocated for current ARM implementation */
 198         ulong relocation_offset = gd->reloc_off;
 199         int i;
 200
 201         /* relocate device name pointers */
 202         for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
 203                 stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
 204                                                 relocation_offset);
 205         }
 206 #endif /* CONFIG_NEEDS_MANUAL_RELOC */
 207
 208         /* Initialize the list */
 209         INIT_LIST_HEAD(&(devs.list));
 210
 211 #ifdef CONFIG_ARM_DCC_MULTI
 212         drv_arm_dcc_init ();
 213 #endif
 214 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 215         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 216 #endif
 217 #ifdef CONFIG_LCD
 218         drv_lcd_init ();
 219 #endif
 220 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 221         drv_video_init ();
 222 #endif
 223 #ifdef CONFIG_KEYBOARD
 224         drv_keyboard_init ();
 225 #endif
 226 #ifdef CONFIG_LOGBUFFER
 227         drv_logbuff_init ();
 228 #endif
 229         drv_system_init ();
 230         serial_stdio_init ();
 231 #ifdef CONFIG_USB_TTY
 232         drv_usbtty_init ();
 233 #endif
 234 #ifdef CONFIG_NETCONSOLE
 235         drv_nc_init ();
 236 #endif
 237 #ifdef CONFIG_JTAG_CONSOLE
 238         drv_jtag_console_init ();
 239 #endif
 240
 241         return (0);
 242 }