common/stdio.c

   1 /*
   2  * (C) Copyright 2000
   3  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <config.h>
   9 #include <common.h>
  10 #include <stdarg.h>
  11 #include <malloc.h>
  12 #include <stdio_dev.h>
  13 #include <serial.h>
  14 #ifdef CONFIG_LOGBUFFER
  15 #include <logbuff.h>
  16 #endif
  17 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
  18 #include <i2c.h>
  19 #endif
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 static struct stdio_dev devs;
  24 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
  25 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
  26
  27 #if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
  28 #define CONFIG_SYS_DEVICE_NULLDEV       1
  29 #endif
  30
  31
  32 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  33 void nulldev_putc(const char c)
  34 {
  35         /* nulldev is empty! */
  36 }
  37
  38 void nulldev_puts(const char *s)
  39 {
  40         /* nulldev is empty! */
  41 }
  42
  43 int nulldev_input(void)
  44 {
  45         /* nulldev is empty! */
  46         return 0;
  47 }
  48 #endif
  49
  50 /**************************************************************************
  51  * SYSTEM DRIVERS
  52  **************************************************************************
  53  */
  54
  55 static void drv_system_init (void)
  56 {
  57         struct stdio_dev dev;
  58
  59         memset (&dev, 0, sizeof (dev));
  60
  61         strcpy (dev.name, "serial");
  62         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  63         dev.putc = serial_putc;
  64         dev.puts = serial_puts;
  65         dev.getc = serial_getc;
  66         dev.tstc = serial_tstc;
  67         stdio_register (&dev);
  68
  69 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  70         memset (&dev, 0, sizeof (dev));
  71
  72         strcpy (dev.name, "nulldev");
  73         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  74         dev.putc = nulldev_putc;
  75         dev.puts = nulldev_puts;
  76         dev.getc = nulldev_input;
  77         dev.tstc = nulldev_input;
  78
  79         stdio_register (&dev);
  80 #endif
  81 }
  82
  83 /**************************************************************************
  84  * DEVICES
  85  **************************************************************************
  86  */
  87 struct list_head* stdio_get_list(void)
  88 {
  89         return &(devs.list);
  90 }
  91
  92 struct stdio_dev* stdio_get_by_name(const char *name)
  93 {
  94         struct list_head *pos;
  95         struct stdio_dev *dev;
  96
  97         if(!name)
  98                 return NULL;
  99
 100         list_for_each(pos, &(devs.list)) {
 101                 dev = list_entry(pos, struct stdio_dev, list);
 102                 if(strcmp(dev->name, name) == 0)
 103                         return dev;
 104         }
 105
 106         return NULL;
 107 }
 108
 109 struct stdio_dev* stdio_clone(struct stdio_dev *dev)
 110 {
 111         struct stdio_dev *_dev;
 112
 113         if(!dev)
 114                 return NULL;
 115
 116         _dev = calloc(1, sizeof(struct stdio_dev));
 117
 118         if(!_dev)
 119                 return NULL;
 120
 121         memcpy(_dev, dev, sizeof(struct stdio_dev));
 122
 123         return _dev;
 124 }
 125
 126 int stdio_register (struct stdio_dev * dev)
 127 {
 128         struct stdio_dev *_dev;
 129
 130         _dev = stdio_clone(dev);
 131         if(!_dev)
 132                 return -1;
 133         list_add_tail(&(_dev->list), &(devs.list));
 134         return 0;
 135 }
 136
 137 /* deregister the device "devname".
 138  * returns 0 if success, -1 if device is assigned and 1 if devname not found
 139  */
 140 #ifdef  CONFIG_SYS_STDIO_DEREGISTER
 141 int stdio_deregister(const char *devname)
 142 {
 143         int l;
 144         struct list_head *pos;
 145         struct stdio_dev *dev;
 146         char temp_names[3][16];
 147
 148         dev = stdio_get_by_name(devname);
 149
 150         if(!dev) /* device not found */
 151                 return -1;
 152         /* get stdio devices (ListRemoveItem changes the dev list) */
 153         for (l=0 ; l< MAX_FILES; l++) {
 154                 if (stdio_devices[l] == dev) {
 155                         /* Device is assigned -> report error */
 156                         return -1;
 157                 }
 158                 memcpy (&temp_names[l][0],
 159                         stdio_devices[l]->name,
 160                         sizeof(temp_names[l]));
 161         }
 162
 163         list_del(&(dev->list));
 164
 165         /* reassign Device list */
 166         list_for_each(pos, &(devs.list)) {
 167                 dev = list_entry(pos, struct stdio_dev, list);
 168                 for (l=0 ; l< MAX_FILES; l++) {
 169                         if(strcmp(dev->name, temp_names[l]) == 0)
 170                                 stdio_devices[l] = dev;
 171                 }
 172         }
 173         return 0;
 174 }
 175 #endif  /* CONFIG_SYS_STDIO_DEREGISTER */
 176
 177 int stdio_init (void)
 178 {
 179 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 180         /* already relocated for current ARM implementation */
 181         ulong relocation_offset = gd->reloc_off;
 182         int i;
 183
 184         /* relocate device name pointers */
 185         for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
 186                 stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
 187                                                 relocation_offset);
 188         }
 189 #endif /* CONFIG_NEEDS_MANUAL_RELOC */
 190
 191         /* Initialize the list */
 192         INIT_LIST_HEAD(&(devs.list));
 193
 194 #ifdef CONFIG_ARM_DCC
 195         drv_arm_dcc_init ();
 196 #endif
 197 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 198         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 199 #endif
 200 #ifdef CONFIG_LCD
 201         drv_lcd_init ();
 202 #endif
 203 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 204         drv_video_init ();
 205 #endif
 206 #ifdef CONFIG_KEYBOARD
 207         drv_keyboard_init ();
 208 #endif
 209 #ifdef CONFIG_LOGBUFFER
 210         drv_logbuff_init ();
 211 #endif
 212         drv_system_init ();
 213         serial_stdio_init ();
 214 #ifdef CONFIG_USB_TTY
 215         drv_usbtty_init ();
 216 #endif
 217 #ifdef CONFIG_NETCONSOLE
 218         drv_nc_init ();
 219 #endif
 220 #ifdef CONFIG_JTAG_CONSOLE
 221         drv_jtag_console_init ();
 222 #endif
 223 #ifdef CONFIG_CBMEM_CONSOLE
 224         cbmemc_init();
 225 #endif
 226         return (0);
 227 }