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 * See file CREDITS for list of people who contributed to this 10 * project. 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License as 14 * published by the Free Software Foundation; either version 2 of 15 * the License, or (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 25 * MA 02111-1307 USA 26 */ 27 28 #include <config.h> 29 #include <common.h> 30 #include <stdarg.h> 31 #include <malloc.h> 32 #include <stdio_dev.h> 33 #include <serial.h> 34 #ifdef CONFIG_LOGBUFFER 35 #include <logbuff.h> 36 #endif 37 38 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C) 39 #include <i2c.h> 40 #endif 41 42 DECLARE_GLOBAL_DATA_PTR; 43 44 static struct stdio_dev devs; 45 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL }; 46 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" }; 47 48 #if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV) 49 #define CONFIG_SYS_DEVICE_NULLDEV 1 50 #endif 51 52 53 #ifdef CONFIG_SYS_DEVICE_NULLDEV 54 void nulldev_putc(const char c) 55 { 56 /* nulldev is empty! */ 57 } 58 59 void nulldev_puts(const char *s) 60 { 61 /* nulldev is empty! */ 62 } 63 64 int nulldev_input(void) 65 { 66 /* nulldev is empty! */ 67 return 0; 68 } 69 #endif 70 71 /************************************************************************** 72 * SYSTEM DRIVERS 73 ************************************************************************** 74 */ 75 76 static void drv_system_init (void) 77 { 78 struct stdio_dev dev; 79 80 memset (&dev, 0, sizeof (dev)); 81 82 strcpy (dev.name, "serial"); 83 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; 84 dev.putc = serial_putc; 85 dev.puts = serial_puts; 86 dev.getc = serial_getc; 87 dev.tstc = serial_tstc; 88 stdio_register (&dev); 89 90 #ifdef CONFIG_SYS_DEVICE_NULLDEV 91 memset (&dev, 0, sizeof (dev)); 92 93 strcpy (dev.name, "nulldev"); 94 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; 95 dev.putc = nulldev_putc; 96 dev.puts = nulldev_puts; 97 dev.getc = nulldev_input; 98 dev.tstc = nulldev_input; 99 100 stdio_register (&dev); 101 #endif 102 } 103 104 /************************************************************************** 105 * DEVICES 106 ************************************************************************** 107 */ 108 struct list_head* stdio_get_list(void) 109 { 110 return &(devs.list); 111 } 112 113 struct stdio_dev* stdio_get_by_name(const char *name) 114 { 115 struct list_head *pos; 116 struct stdio_dev *dev; 117 118 if(!name) 119 return NULL; 120 121 list_for_each(pos, &(devs.list)) { 122 dev = list_entry(pos, struct stdio_dev, list); 123 if(strcmp(dev->name, name) == 0) 124 return dev; 125 } 126 127 return NULL; 128 } 129 130 struct stdio_dev* stdio_clone(struct stdio_dev *dev) 131 { 132 struct stdio_dev *_dev; 133 134 if(!dev) 135 return NULL; 136 137 _dev = calloc(1, sizeof(struct stdio_dev)); 138 139 if(!_dev) 140 return NULL; 141 142 memcpy(_dev, dev, sizeof(struct stdio_dev)); 143 144 return _dev; 145 } 146 147 int stdio_register (struct stdio_dev * dev) 148 { 149 struct stdio_dev *_dev; 150 151 _dev = stdio_clone(dev); 152 if(!_dev) 153 return -1; 154 list_add_tail(&(_dev->list), &(devs.list)); 155 return 0; 156 } 157 158 /* deregister the device "devname". 159 * returns 0 if success, -1 if device is assigned and 1 if devname not found 160 */ 161 #ifdef CONFIG_SYS_STDIO_DEREGISTER 162 int stdio_deregister(const char *devname) 163 { 164 int l; 165 struct list_head *pos; 166 struct stdio_dev *dev; 167 char temp_names[3][16]; 168 169 dev = stdio_get_by_name(devname); 170 171 if(!dev) /* device not found */ 172 return -1; 173 /* get stdio devices (ListRemoveItem changes the dev list) */ 174 for (l=0 ; l< MAX_FILES; l++) { 175 if (stdio_devices[l] == dev) { 176 /* Device is assigned -> report error */ 177 return -1; 178 } 179 memcpy (&temp_names[l][0], 180 stdio_devices[l]->name, 181 sizeof(temp_names[l])); 182 } 183 184 list_del(&(dev->list)); 185 186 /* reassign Device list */ 187 list_for_each(pos, &(devs.list)) { 188 dev = list_entry(pos, struct stdio_dev, list); 189 for (l=0 ; l< MAX_FILES; l++) { 190 if(strcmp(dev->name, temp_names[l]) == 0) 191 stdio_devices[l] = dev; 192 } 193 } 194 return 0; 195 } 196 #endif /* CONFIG_SYS_STDIO_DEREGISTER */ 197 198 int stdio_init (void) 199 { 200 #if defined(CONFIG_NEEDS_MANUAL_RELOC) 201 /* already relocated for current ARM implementation */ 202 ulong relocation_offset = gd->reloc_off; 203 int i; 204 205 /* relocate device name pointers */ 206 for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) { 207 stdio_names[i] = (char *) (((ulong) stdio_names[i]) + 208 relocation_offset); 209 } 210 #endif /* CONFIG_NEEDS_MANUAL_RELOC */ 211 212 /* Initialize the list */ 213 INIT_LIST_HEAD(&(devs.list)); 214 215 #ifdef CONFIG_ARM_DCC 216 drv_arm_dcc_init (); 217 #endif 218 #ifdef CONFIG_SYS_I2C 219 i2c_init_all(); 220 #else 221 #if defined(CONFIG_HARD_I2C) 222 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); 223 #endif 224 #endif 225 #ifdef CONFIG_LCD 226 drv_lcd_init (); 227 #endif 228 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE) 229 drv_video_init (); 230 #endif 231 #ifdef CONFIG_KEYBOARD 232 drv_keyboard_init (); 233 #endif 234 #ifdef CONFIG_LOGBUFFER 235 drv_logbuff_init (); 236 #endif 237 drv_system_init (); 238 serial_stdio_init (); 239 #ifdef CONFIG_USB_TTY 240 drv_usbtty_init (); 241 #endif 242 #ifdef CONFIG_NETCONSOLE 243 drv_nc_init (); 244 #endif 245 #ifdef CONFIG_JTAG_CONSOLE 246 drv_jtag_console_init (); 247 #endif 248 #ifdef CONFIG_CBMEM_CONSOLE 249 cbmemc_init(); 250 #endif 251 return (0); 252 } 253