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 void vidconsole_back(struct udevice *dev) 61 { 62 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 63 64 priv->xcur_frac -= VID_TO_POS(priv->x_charsize); 65 if (priv->xcur_frac < priv->xstart_frac) { 66 priv->xcur_frac = (priv->cols - 1) * 67 VID_TO_POS(priv->x_charsize); 68 priv->ycur -= priv->y_charsize; 69 if (priv->ycur < 0) 70 priv->ycur = 0; 71 } 72 } 73 74 /* Move to a newline, scrolling the display if necessary */ 75 static void vidconsole_newline(struct udevice *dev) 76 { 77 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 78 struct udevice *vid_dev = dev->parent; 79 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 80 const int rows = CONFIG_CONSOLE_SCROLL_LINES; 81 int i; 82 83 priv->xcur_frac = priv->xstart_frac; 84 priv->ycur += priv->y_charsize; 85 86 /* Check if we need to scroll the terminal */ 87 if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) { 88 vidconsole_move_rows(dev, 0, rows, priv->rows - rows); 89 for (i = 0; i < rows; i++) 90 vidconsole_set_row(dev, priv->rows - i - 1, 91 vid_priv->colour_bg); 92 priv->ycur -= rows * priv->y_charsize; 93 } 94 priv->last_ch = 0; 95 96 video_sync(dev->parent); 97 } 98 99 int vidconsole_put_char(struct udevice *dev, char ch) 100 { 101 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 102 int ret; 103 104 switch (ch) { 105 case '\a': 106 /* beep */ 107 break; 108 case '\r': 109 priv->xcur_frac = priv->xstart_frac; 110 break; 111 case '\n': 112 vidconsole_newline(dev); 113 vidconsole_entry_start(dev); 114 break; 115 case '\t': /* Tab (8 chars alignment) */ 116 priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac) 117 + 1) * priv->tab_width_frac; 118 119 if (priv->xcur_frac >= priv->xsize_frac) 120 vidconsole_newline(dev); 121 break; 122 case '\b': 123 vidconsole_back(dev); 124 priv->last_ch = 0; 125 break; 126 default: 127 /* 128 * Failure of this function normally indicates an unsupported 129 * colour depth. Check this and return an error to help with 130 * diagnosis. 131 */ 132 ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch); 133 if (ret == -EAGAIN) { 134 vidconsole_newline(dev); 135 ret = vidconsole_putc_xy(dev, priv->xcur_frac, 136 priv->ycur, ch); 137 } 138 if (ret < 0) 139 return ret; 140 priv->xcur_frac += ret; 141 priv->last_ch = ch; 142 if (priv->xcur_frac >= priv->xsize_frac) 143 vidconsole_newline(dev); 144 break; 145 } 146 147 return 0; 148 } 149 150 static void vidconsole_putc(struct stdio_dev *sdev, const char ch) 151 { 152 struct udevice *dev = sdev->priv; 153 154 vidconsole_put_char(dev, ch); 155 } 156 157 static void vidconsole_puts(struct stdio_dev *sdev, const char *s) 158 { 159 struct udevice *dev = sdev->priv; 160 161 while (*s) 162 vidconsole_put_char(dev, *s++); 163 } 164 165 /* Set up the number of rows and colours (rotated drivers override this) */ 166 static int vidconsole_pre_probe(struct udevice *dev) 167 { 168 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 169 struct udevice *vid = dev->parent; 170 struct video_priv *vid_priv = dev_get_uclass_priv(vid); 171 172 priv->xsize_frac = VID_TO_POS(vid_priv->xsize); 173 174 return 0; 175 } 176 177 /* Register the device with stdio */ 178 static int vidconsole_post_probe(struct udevice *dev) 179 { 180 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 181 struct stdio_dev *sdev = &priv->sdev; 182 int ret; 183 184 if (!priv->tab_width_frac) 185 priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8; 186 187 if (dev->seq) { 188 snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d", 189 dev->seq); 190 } else { 191 strcpy(sdev->name, "vidconsole"); 192 } 193 194 sdev->flags = DEV_FLAGS_OUTPUT; 195 sdev->putc = vidconsole_putc; 196 sdev->puts = vidconsole_puts; 197 sdev->priv = dev; 198 ret = stdio_register(sdev); 199 if (ret) 200 return ret; 201 202 return 0; 203 } 204 205 UCLASS_DRIVER(vidconsole) = { 206 .id = UCLASS_VIDEO_CONSOLE, 207 .name = "vidconsole0", 208 .pre_probe = vidconsole_pre_probe, 209 .post_probe = vidconsole_post_probe, 210 .per_device_auto_alloc_size = sizeof(struct vidconsole_priv), 211 }; 212 213 void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row) 214 { 215 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 216 struct udevice *vid_dev = dev->parent; 217 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 218 219 priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1)); 220 priv->ycur = min_t(short, row, vid_priv->ysize - 1); 221 } 222 223 static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc, 224 char *const argv[]) 225 { 226 unsigned int col, row; 227 struct udevice *dev; 228 229 if (argc != 3) 230 return CMD_RET_USAGE; 231 232 uclass_first_device(UCLASS_VIDEO_CONSOLE, &dev); 233 if (!dev) 234 return CMD_RET_FAILURE; 235 col = simple_strtoul(argv[1], NULL, 10); 236 row = simple_strtoul(argv[2], NULL, 10); 237 vidconsole_position_cursor(dev, col, row); 238 239 return 0; 240 } 241 242 static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc, 243 char *const argv[]) 244 { 245 struct udevice *dev; 246 const char *s; 247 248 if (argc != 2) 249 return CMD_RET_USAGE; 250 251 uclass_first_device(UCLASS_VIDEO_CONSOLE, &dev); 252 if (!dev) 253 return CMD_RET_FAILURE; 254 for (s = argv[1]; *s; s++) 255 vidconsole_put_char(dev, *s); 256 257 return 0; 258 } 259 260 U_BOOT_CMD( 261 setcurs, 3, 1, do_video_setcursor, 262 "set cursor position within screen", 263 " <col> <row> in character" 264 ); 265 266 U_BOOT_CMD( 267 lcdputs, 2, 1, do_video_puts, 268 "print string on video framebuffer", 269 " <string>" 270 ); 271