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