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 } 228