1 /* 2 * Copyright (c) 2015 Google, Inc 3 * (C) Copyright 2001-2015 4 * DENX Software Engineering -- wd@denx.de 5 * Compulab Ltd - http://compulab.co.il/ 6 * Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <dm.h> 13 #include <video.h> 14 #include <video_console.h> 15 #include <video_font.h> /* Get font data, width and height */ 16 17 /* By default we scroll by a single line */ 18 #ifndef CONFIG_CONSOLE_SCROLL_LINES 19 #define CONFIG_CONSOLE_SCROLL_LINES 1 20 #endif 21 22 int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch) 23 { 24 struct vidconsole_ops *ops = vidconsole_get_ops(dev); 25 26 if (!ops->putc_xy) 27 return -ENOSYS; 28 return ops->putc_xy(dev, x, y, ch); 29 } 30 31 int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc, 32 uint count) 33 { 34 struct vidconsole_ops *ops = vidconsole_get_ops(dev); 35 36 if (!ops->move_rows) 37 return -ENOSYS; 38 return ops->move_rows(dev, rowdst, rowsrc, count); 39 } 40 41 int vidconsole_set_row(struct udevice *dev, uint row, int clr) 42 { 43 struct vidconsole_ops *ops = vidconsole_get_ops(dev); 44 45 if (!ops->set_row) 46 return -ENOSYS; 47 return ops->set_row(dev, row, clr); 48 } 49 50 static int vidconsole_entry_start(struct udevice *dev) 51 { 52 struct vidconsole_ops *ops = vidconsole_get_ops(dev); 53 54 if (!ops->entry_start) 55 return -ENOSYS; 56 return ops->entry_start(dev); 57 } 58 59 /* Move backwards one space */ 60 static int vidconsole_back(struct udevice *dev) 61 { 62 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 63 struct vidconsole_ops *ops = vidconsole_get_ops(dev); 64 int ret; 65 66 if (ops->backspace) { 67 ret = ops->backspace(dev); 68 if (ret != -ENOSYS) 69 return ret; 70 } 71 72 priv->xcur_frac -= VID_TO_POS(priv->x_charsize); 73 if (priv->xcur_frac < priv->xstart_frac) { 74 priv->xcur_frac = (priv->cols - 1) * 75 VID_TO_POS(priv->x_charsize); 76 priv->ycur -= priv->y_charsize; 77 if (priv->ycur < 0) 78 priv->ycur = 0; 79 } 80 video_sync(dev->parent); 81 82 return 0; 83 } 84 85 /* Move to a newline, scrolling the display if necessary */ 86 static void vidconsole_newline(struct udevice *dev) 87 { 88 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 89 struct udevice *vid_dev = dev->parent; 90 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 91 const int rows = CONFIG_CONSOLE_SCROLL_LINES; 92 int i; 93 94 priv->xcur_frac = priv->xstart_frac; 95 priv->ycur += priv->y_charsize; 96 97 /* Check if we need to scroll the terminal */ 98 if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) { 99 vidconsole_move_rows(dev, 0, rows, priv->rows - rows); 100 for (i = 0; i < rows; i++) 101 vidconsole_set_row(dev, priv->rows - i - 1, 102 vid_priv->colour_bg); 103 priv->ycur -= rows * priv->y_charsize; 104 } 105 priv->last_ch = 0; 106 107 video_sync(dev->parent); 108 } 109 110 int vidconsole_put_char(struct udevice *dev, char ch) 111 { 112 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 113 int ret; 114 115 switch (ch) { 116 case '\a': 117 /* beep */ 118 break; 119 case '\r': 120 priv->xcur_frac = priv->xstart_frac; 121 break; 122 case '\n': 123 vidconsole_newline(dev); 124 vidconsole_entry_start(dev); 125 break; 126 case '\t': /* Tab (8 chars alignment) */ 127 priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac) 128 + 1) * priv->tab_width_frac; 129 130 if (priv->xcur_frac >= priv->xsize_frac) 131 vidconsole_newline(dev); 132 break; 133 case '\b': 134 vidconsole_back(dev); 135 priv->last_ch = 0; 136 break; 137 default: 138 /* 139 * Failure of this function normally indicates an unsupported 140 * colour depth. Check this and return an error to help with 141 * diagnosis. 142 */ 143 ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch); 144 if (ret == -EAGAIN) { 145 vidconsole_newline(dev); 146 ret = vidconsole_putc_xy(dev, priv->xcur_frac, 147 priv->ycur, ch); 148 } 149 if (ret < 0) 150 return ret; 151 priv->xcur_frac += ret; 152 priv->last_ch = ch; 153 if (priv->xcur_frac >= priv->xsize_frac) 154 vidconsole_newline(dev); 155 break; 156 } 157 158 return 0; 159 } 160 161 static void vidconsole_putc(struct stdio_dev *sdev, const char ch) 162 { 163 struct udevice *dev = sdev->priv; 164 165 vidconsole_put_char(dev, ch); 166 } 167 168 static void vidconsole_puts(struct stdio_dev *sdev, const char *s) 169 { 170 struct udevice *dev = sdev->priv; 171 172 while (*s) 173 vidconsole_put_char(dev, *s++); 174 video_sync(dev->parent); 175 } 176 177 /* Set up the number of rows and colours (rotated drivers override this) */ 178 static int vidconsole_pre_probe(struct udevice *dev) 179 { 180 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 181 struct udevice *vid = dev->parent; 182 struct video_priv *vid_priv = dev_get_uclass_priv(vid); 183 184 priv->xsize_frac = VID_TO_POS(vid_priv->xsize); 185 186 return 0; 187 } 188 189 /* Register the device with stdio */ 190 static int vidconsole_post_probe(struct udevice *dev) 191 { 192 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 193 struct stdio_dev *sdev = &priv->sdev; 194 195 if (!priv->tab_width_frac) 196 priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8; 197 198 if (dev->seq) { 199 snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d", 200 dev->seq); 201 } else { 202 strcpy(sdev->name, "vidconsole"); 203 } 204 205 sdev->flags = DEV_FLAGS_OUTPUT; 206 sdev->putc = vidconsole_putc; 207 sdev->puts = vidconsole_puts; 208 sdev->priv = dev; 209 210 return stdio_register(sdev); 211 } 212 213 UCLASS_DRIVER(vidconsole) = { 214 .id = UCLASS_VIDEO_CONSOLE, 215 .name = "vidconsole0", 216 .pre_probe = vidconsole_pre_probe, 217 .post_probe = vidconsole_post_probe, 218 .per_device_auto_alloc_size = sizeof(struct vidconsole_priv), 219 }; 220 221 void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row) 222 { 223 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 224 struct udevice *vid_dev = dev->parent; 225 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 226 227 priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1)); 228 priv->ycur = min_t(short, row, vid_priv->ysize - 1); 229 } 230 231 static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc, 232 char *const argv[]) 233 { 234 unsigned int col, row; 235 struct udevice *dev; 236 237 if (argc != 3) 238 return CMD_RET_USAGE; 239 240 if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev)) 241 return CMD_RET_FAILURE; 242 col = simple_strtoul(argv[1], NULL, 10); 243 row = simple_strtoul(argv[2], NULL, 10); 244 vidconsole_position_cursor(dev, col, row); 245 246 return 0; 247 } 248 249 static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc, 250 char *const argv[]) 251 { 252 struct udevice *dev; 253 const char *s; 254 255 if (argc != 2) 256 return CMD_RET_USAGE; 257 258 if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev)) 259 return CMD_RET_FAILURE; 260 for (s = argv[1]; *s; s++) 261 vidconsole_put_char(dev, *s); 262 263 return 0; 264 } 265 266 U_BOOT_CMD( 267 setcurs, 3, 1, do_video_setcursor, 268 "set cursor position within screen", 269 " <col> <row> in character" 270 ); 271 272 U_BOOT_CMD( 273 lcdputs, 2, 1, do_video_puts, 274 "print string on video framebuffer", 275 " <string>" 276 ); 277