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 /* Move backwards one space */ 51 static void vidconsole_back(struct udevice *dev) 52 { 53 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 54 55 priv->xcur_frac -= VID_TO_POS(priv->x_charsize); 56 if (priv->xcur_frac < priv->xstart_frac) { 57 priv->xcur_frac = (priv->cols - 1) * 58 VID_TO_POS(priv->x_charsize); 59 priv->ycur -= priv->y_charsize; 60 if (priv->ycur < 0) 61 priv->ycur = 0; 62 } 63 } 64 65 /* Move to a newline, scrolling the display if necessary */ 66 static void vidconsole_newline(struct udevice *dev) 67 { 68 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 69 struct udevice *vid_dev = dev->parent; 70 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 71 const int rows = CONFIG_CONSOLE_SCROLL_LINES; 72 int i; 73 74 priv->xcur_frac = priv->xstart_frac; 75 priv->ycur += priv->y_charsize; 76 77 /* Check if we need to scroll the terminal */ 78 if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) { 79 vidconsole_move_rows(dev, 0, rows, priv->rows - rows); 80 for (i = 0; i < rows; i++) 81 vidconsole_set_row(dev, priv->rows - i - 1, 82 vid_priv->colour_bg); 83 priv->ycur -= rows * priv->y_charsize; 84 } 85 video_sync(dev->parent); 86 } 87 88 int vidconsole_put_char(struct udevice *dev, char ch) 89 { 90 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 91 int ret; 92 93 switch (ch) { 94 case '\a': 95 /* beep */ 96 break; 97 case '\r': 98 priv->xcur_frac = priv->xstart_frac; 99 break; 100 case '\n': 101 vidconsole_newline(dev); 102 break; 103 case '\t': /* Tab (8 chars alignment) */ 104 priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac) 105 + 1) * priv->tab_width_frac; 106 107 if (priv->xcur_frac >= priv->xsize_frac) 108 vidconsole_newline(dev); 109 break; 110 case '\b': 111 vidconsole_back(dev); 112 break; 113 default: 114 /* 115 * Failure of this function normally indicates an unsupported 116 * colour depth. Check this and return an error to help with 117 * diagnosis. 118 */ 119 ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch); 120 if (ret == -EAGAIN) { 121 vidconsole_newline(dev); 122 ret = vidconsole_putc_xy(dev, priv->xcur_frac, 123 priv->ycur, ch); 124 } 125 if (ret < 0) 126 return ret; 127 priv->xcur_frac += ret; 128 if (priv->xcur_frac >= priv->xsize_frac) 129 vidconsole_newline(dev); 130 break; 131 } 132 133 return 0; 134 } 135 136 static void vidconsole_putc(struct stdio_dev *sdev, const char ch) 137 { 138 struct udevice *dev = sdev->priv; 139 140 vidconsole_put_char(dev, ch); 141 } 142 143 static void vidconsole_puts(struct stdio_dev *sdev, const char *s) 144 { 145 struct udevice *dev = sdev->priv; 146 147 while (*s) 148 vidconsole_put_char(dev, *s++); 149 } 150 151 /* Set up the number of rows and colours (rotated drivers override this) */ 152 static int vidconsole_pre_probe(struct udevice *dev) 153 { 154 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 155 struct udevice *vid = dev->parent; 156 struct video_priv *vid_priv = dev_get_uclass_priv(vid); 157 158 priv->xsize_frac = VID_TO_POS(vid_priv->xsize); 159 160 return 0; 161 } 162 163 /* Register the device with stdio */ 164 static int vidconsole_post_probe(struct udevice *dev) 165 { 166 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 167 struct stdio_dev *sdev = &priv->sdev; 168 int ret; 169 170 if (!priv->tab_width_frac) 171 priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8; 172 173 if (dev->seq) { 174 snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d", 175 dev->seq); 176 } else { 177 strcpy(sdev->name, "vidconsole"); 178 } 179 180 sdev->flags = DEV_FLAGS_OUTPUT; 181 sdev->putc = vidconsole_putc; 182 sdev->puts = vidconsole_puts; 183 sdev->priv = dev; 184 ret = stdio_register(sdev); 185 if (ret) 186 return ret; 187 188 return 0; 189 } 190 191 UCLASS_DRIVER(vidconsole) = { 192 .id = UCLASS_VIDEO_CONSOLE, 193 .name = "vidconsole0", 194 .pre_probe = vidconsole_pre_probe, 195 .post_probe = vidconsole_post_probe, 196 .per_device_auto_alloc_size = sizeof(struct vidconsole_priv), 197 }; 198 199 void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row) 200 { 201 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 202 struct udevice *vid_dev = dev->parent; 203 struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); 204 205 priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1)); 206 priv->ycur = min_t(short, row, vid_priv->ysize - 1); 207 } 208 209 static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc, 210 char *const argv[]) 211 { 212 unsigned int col, row; 213 struct udevice *dev; 214 215 if (argc != 3) 216 return CMD_RET_USAGE; 217 218 uclass_first_device(UCLASS_VIDEO_CONSOLE, &dev); 219 if (!dev) 220 return CMD_RET_FAILURE; 221 col = simple_strtoul(argv[1], NULL, 10); 222 row = simple_strtoul(argv[2], NULL, 10); 223 vidconsole_position_cursor(dev, col, row); 224 225 return 0; 226 } 227 228 static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc, 229 char *const argv[]) 230 { 231 struct udevice *dev; 232 const char *s; 233 234 if (argc != 2) 235 return CMD_RET_USAGE; 236 237 uclass_first_device(UCLASS_VIDEO_CONSOLE, &dev); 238 if (!dev) 239 return CMD_RET_FAILURE; 240 for (s = argv[1]; *s; s++) 241 vidconsole_put_char(dev, *s); 242 243 return 0; 244 } 245 246 U_BOOT_CMD( 247 setcurs, 3, 1, do_video_setcursor, 248 "set cursor position within screen", 249 " <col> <row> in character" 250 ); 251 252 U_BOOT_CMD( 253 lcdputs, 2, 1, do_video_puts, 254 "print string on video framebuffer", 255 " <string>" 256 ); 257