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 81 return 0; 82 } 83 84 /* Move to a newline, scrolling the display if necessary */ 85 static void vidconsole_newline(struct udevice *dev) 86 { 87 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 88 struct udevice *vid_dev = dev->parent; 89 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 90 const int rows = CONFIG_CONSOLE_SCROLL_LINES; 91 int i; 92 93 priv->xcur_frac = priv->xstart_frac; 94 priv->ycur += priv->y_charsize; 95 96 /* Check if we need to scroll the terminal */ 97 if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) { 98 vidconsole_move_rows(dev, 0, rows, priv->rows - rows); 99 for (i = 0; i < rows; i++) 100 vidconsole_set_row(dev, priv->rows - i - 1, 101 vid_priv->colour_bg); 102 priv->ycur -= rows * priv->y_charsize; 103 } 104 priv->last_ch = 0; 105 106 video_sync(dev->parent); 107 } 108 109 int vidconsole_put_char(struct udevice *dev, char ch) 110 { 111 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 112 int ret; 113 114 switch (ch) { 115 case '\a': 116 /* beep */ 117 break; 118 case '\r': 119 priv->xcur_frac = priv->xstart_frac; 120 break; 121 case '\n': 122 vidconsole_newline(dev); 123 vidconsole_entry_start(dev); 124 break; 125 case '\t': /* Tab (8 chars alignment) */ 126 priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac) 127 + 1) * priv->tab_width_frac; 128 129 if (priv->xcur_frac >= priv->xsize_frac) 130 vidconsole_newline(dev); 131 break; 132 case '\b': 133 vidconsole_back(dev); 134 priv->last_ch = 0; 135 break; 136 default: 137 /* 138 * Failure of this function normally indicates an unsupported 139 * colour depth. Check this and return an error to help with 140 * diagnosis. 141 */ 142 ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch); 143 if (ret == -EAGAIN) { 144 vidconsole_newline(dev); 145 ret = vidconsole_putc_xy(dev, priv->xcur_frac, 146 priv->ycur, ch); 147 } 148 if (ret < 0) 149 return ret; 150 priv->xcur_frac += ret; 151 priv->last_ch = ch; 152 if (priv->xcur_frac >= priv->xsize_frac) 153 vidconsole_newline(dev); 154 break; 155 } 156 157 return 0; 158 } 159 160 static void vidconsole_putc(struct stdio_dev *sdev, const char ch) 161 { 162 struct udevice *dev = sdev->priv; 163 164 vidconsole_put_char(dev, ch); 165 } 166 167 static void vidconsole_puts(struct stdio_dev *sdev, const char *s) 168 { 169 struct udevice *dev = sdev->priv; 170 171 while (*s) 172 vidconsole_put_char(dev, *s++); 173 video_sync(dev->parent); 174 } 175 176 /* Set up the number of rows and colours (rotated drivers override this) */ 177 static int vidconsole_pre_probe(struct udevice *dev) 178 { 179 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 180 struct udevice *vid = dev->parent; 181 struct video_priv *vid_priv = dev_get_uclass_priv(vid); 182 183 priv->xsize_frac = VID_TO_POS(vid_priv->xsize); 184 185 return 0; 186 } 187 188 /* Register the device with stdio */ 189 static int vidconsole_post_probe(struct udevice *dev) 190 { 191 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 192 struct stdio_dev *sdev = &priv->sdev; 193 int ret; 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 ret = stdio_register(sdev); 210 if (ret) 211 return ret; 212 213 return 0; 214 } 215 216 UCLASS_DRIVER(vidconsole) = { 217 .id = UCLASS_VIDEO_CONSOLE, 218 .name = "vidconsole0", 219 .pre_probe = vidconsole_pre_probe, 220 .post_probe = vidconsole_post_probe, 221 .per_device_auto_alloc_size = sizeof(struct vidconsole_priv), 222 }; 223 224 void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row) 225 { 226 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 227 struct udevice *vid_dev = dev->parent; 228 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 229 230 priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1)); 231 priv->ycur = min_t(short, row, vid_priv->ysize - 1); 232 } 233 234 static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc, 235 char *const argv[]) 236 { 237 unsigned int col, row; 238 struct udevice *dev; 239 240 if (argc != 3) 241 return CMD_RET_USAGE; 242 243 if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev)) 244 return CMD_RET_FAILURE; 245 col = simple_strtoul(argv[1], NULL, 10); 246 row = simple_strtoul(argv[2], NULL, 10); 247 vidconsole_position_cursor(dev, col, row); 248 249 return 0; 250 } 251 252 static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc, 253 char *const argv[]) 254 { 255 struct udevice *dev; 256 const char *s; 257 258 if (argc != 2) 259 return CMD_RET_USAGE; 260 261 if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev)) 262 return CMD_RET_FAILURE; 263 for (s = argv[1]; *s; s++) 264 vidconsole_put_char(dev, *s); 265 266 return 0; 267 } 268 269 U_BOOT_CMD( 270 setcurs, 3, 1, do_video_setcursor, 271 "set cursor position within screen", 272 " <col> <row> in character" 273 ); 274 275 U_BOOT_CMD( 276 lcdputs, 2, 1, do_video_puts, 277 "print string on video framebuffer", 278 " <string>" 279 ); 280