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 <stdarg.h>
  15 #include <malloc.h>
  16 #include <stdio_dev.h>
  17 #include <serial.h>
  18 #ifdef CONFIG_LOGBUFFER
  19 #include <logbuff.h>
  20 #endif
  21
  22 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
  23 #include <i2c.h>
  24 #endif
  25
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 static struct stdio_dev devs;
  29 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
  30 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
  31
  32 #if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
  33 #define CONFIG_SYS_DEVICE_NULLDEV       1
  34 #endif
  35
  36
  37 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  38 void nulldev_putc(struct stdio_dev *dev, const char c)
  39 {
  40         /* nulldev is empty! */
  41 }
  42
  43 void nulldev_puts(struct stdio_dev *dev, const char *s)
  44 {
  45         /* nulldev is empty! */
  46 }
  47
  48 int nulldev_input(struct stdio_dev *dev)
  49 {
  50         /* nulldev is empty! */
  51         return 0;
  52 }
  53 #endif
  54
  55 void stdio_serial_putc(struct stdio_dev *dev, const char c)
  56 {
  57         serial_putc(c);
  58 }
  59
  60 void stdio_serial_puts(struct stdio_dev *dev, const char *s)
  61 {
  62         serial_puts(s);
  63 }
  64
  65 int stdio_serial_getc(struct stdio_dev *dev)
  66 {
  67         return serial_getc();
  68 }
  69
  70 int stdio_serial_tstc(struct stdio_dev *dev)
  71 {
  72         return serial_tstc();
  73 }
  74
  75 /**************************************************************************
  76  * SYSTEM DRIVERS
  77  **************************************************************************
  78  */
  79
  80 static void drv_system_init (void)
  81 {
  82         struct stdio_dev dev;
  83
  84         memset (&dev, 0, sizeof (dev));
  85
  86         strcpy (dev.name, "serial");
  87         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  88         dev.putc = stdio_serial_putc;
  89         dev.puts = stdio_serial_puts;
  90         dev.getc = stdio_serial_getc;
  91         dev.tstc = stdio_serial_tstc;
  92         stdio_register (&dev);
  93
  94 #ifdef CONFIG_SYS_DEVICE_NULLDEV
  95         memset (&dev, 0, sizeof (dev));
  96
  97         strcpy (dev.name, "nulldev");
  98         dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
  99         dev.putc = nulldev_putc;
 100         dev.puts = nulldev_puts;
 101         dev.getc = nulldev_input;
 102         dev.tstc = nulldev_input;
 103
 104         stdio_register (&dev);
 105 #endif
 106 }
 107
 108 /**************************************************************************
 109  * DEVICES
 110  **************************************************************************
 111  */
 112 struct list_head* stdio_get_list(void)
 113 {
 114         return &(devs.list);
 115 }
 116
 117 struct stdio_dev* stdio_get_by_name(const char *name)
 118 {
 119         struct list_head *pos;
 120         struct stdio_dev *dev;
 121
 122         if(!name)
 123                 return NULL;
 124
 125         list_for_each(pos, &(devs.list)) {
 126                 dev = list_entry(pos, struct stdio_dev, list);
 127                 if(strcmp(dev->name, name) == 0)
 128                         return dev;
 129         }
 130
 131         return NULL;
 132 }
 133
 134 struct stdio_dev* stdio_clone(struct stdio_dev *dev)
 135 {
 136         struct stdio_dev *_dev;
 137
 138         if(!dev)
 139                 return NULL;
 140
 141         _dev = calloc(1, sizeof(struct stdio_dev));
 142
 143         if(!_dev)
 144                 return NULL;
 145
 146         memcpy(_dev, dev, sizeof(struct stdio_dev));
 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(const char *devname)
 167 {
 168         int l;
 169         struct list_head *pos;
 170         struct stdio_dev *dev;
 171         char temp_names[3][16];
 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(temp_names[l]));
 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 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 205         /* already relocated for current ARM implementation */
 206         ulong relocation_offset = gd->reloc_off;
 207         int i;
 208
 209         /* relocate device name pointers */
 210         for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
 211                 stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
 212                                                 relocation_offset);
 213         }
 214 #endif /* CONFIG_NEEDS_MANUAL_RELOC */
 215
 216         /* Initialize the list */
 217         INIT_LIST_HEAD(&(devs.list));
 218
 219 #ifdef CONFIG_SYS_I2C
 220         i2c_init_all();
 221 #else
 222 #if defined(CONFIG_HARD_I2C)
 223         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 224 #endif
 225 #endif
 226 #ifdef CONFIG_LCD
 227         drv_lcd_init ();
 228 #endif
 229 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 230         drv_video_init ();
 231 #endif
 232 #ifdef CONFIG_KEYBOARD
 233         drv_keyboard_init ();
 234 #endif
 235 #ifdef CONFIG_LOGBUFFER
 236         drv_logbuff_init ();
 237 #endif
 238         drv_system_init ();
 239         serial_stdio_init ();
 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 #ifdef CONFIG_CBMEM_CONSOLE
 250         cbmemc_init();
 251 #endif
 252         return (0);
 253 }