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 #ifdef CONFIG_SERIAL_MULTI 231 serial_stdio_init (); 232 #endif 233 #ifdef CONFIG_USB_TTY 234 drv_usbtty_init (); 235 #endif 236 #ifdef CONFIG_NETCONSOLE 237 drv_nc_init (); 238 #endif 239 #ifdef CONFIG_JTAG_CONSOLE 240 drv_jtag_console_init (); 241 #endif 242 243 return (0); 244 } 245