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 if (--priv->curr_col < 0) { 56 priv->curr_col = priv->cols - 1; 57 if (--priv->curr_row < 0) 58 priv->curr_row = 0; 59 } 60 61 vidconsole_putc_xy(dev, priv->curr_col * VIDEO_FONT_WIDTH, 62 priv->curr_row * VIDEO_FONT_HEIGHT, ' '); 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->curr_col = 0; 75 76 /* Check if we need to scroll the terminal */ 77 if (++priv->curr_row >= priv->rows) { 78 vidconsole_move_rows(dev, 0, rows, priv->rows - rows); 79 for (i = 0; i < rows; i++) 80 vidconsole_set_row(dev, priv->rows - i - 1, 81 vid_priv->colour_bg); 82 priv->curr_row -= rows; 83 } 84 video_sync(dev->parent); 85 } 86 87 int vidconsole_put_char(struct udevice *dev, char ch) 88 { 89 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 90 int ret; 91 92 switch (ch) { 93 case '\r': 94 priv->curr_col = 0; 95 break; 96 case '\n': 97 vidconsole_newline(dev); 98 break; 99 case '\t': /* Tab (8 chars alignment) */ 100 priv->curr_col += 8; 101 priv->curr_col &= ~7; 102 103 if (priv->curr_col >= priv->cols) 104 vidconsole_newline(dev); 105 break; 106 case '\b': 107 vidconsole_back(dev); 108 break; 109 default: 110 /* 111 * Failure of this function normally indicates an unsupported 112 * colour depth. Check this and return an error to help with 113 * diagnosis. 114 */ 115 ret = vidconsole_putc_xy(dev, 116 priv->curr_col * VIDEO_FONT_WIDTH, 117 priv->curr_row * VIDEO_FONT_HEIGHT, 118 ch); 119 if (ret) 120 return ret; 121 if (++priv->curr_col >= priv->cols) 122 vidconsole_newline(dev); 123 break; 124 } 125 126 return 0; 127 } 128 129 static void vidconsole_putc(struct stdio_dev *sdev, const char ch) 130 { 131 struct udevice *dev = sdev->priv; 132 133 vidconsole_put_char(dev, ch); 134 } 135 136 static void vidconsole_puts(struct stdio_dev *sdev, const char *s) 137 { 138 struct udevice *dev = sdev->priv; 139 140 while (*s) 141 vidconsole_put_char(dev, *s++); 142 } 143 144 /* Set up the number of rows and colours (rotated drivers override this) */ 145 static int vidconsole_pre_probe(struct udevice *dev) 146 { 147 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 148 struct udevice *vid = dev->parent; 149 struct video_priv *vid_priv = dev_get_uclass_priv(vid); 150 151 priv->rows = vid_priv->ysize / VIDEO_FONT_HEIGHT; 152 priv->cols = vid_priv->xsize / VIDEO_FONT_WIDTH; 153 154 return 0; 155 } 156 157 /* Register the device with stdio */ 158 static int vidconsole_post_probe(struct udevice *dev) 159 { 160 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 161 struct stdio_dev *sdev = &priv->sdev; 162 int ret; 163 164 strlcpy(sdev->name, dev->name, sizeof(sdev->name)); 165 sdev->flags = DEV_FLAGS_OUTPUT; 166 sdev->putc = vidconsole_putc; 167 sdev->puts = vidconsole_puts; 168 sdev->priv = dev; 169 ret = stdio_register(sdev); 170 if (ret) 171 return ret; 172 173 return 0; 174 } 175 176 UCLASS_DRIVER(vidconsole) = { 177 .id = UCLASS_VIDEO_CONSOLE, 178 .name = "vidconsole0", 179 .pre_probe = vidconsole_pre_probe, 180 .post_probe = vidconsole_post_probe, 181 .per_device_auto_alloc_size = sizeof(struct vidconsole_priv), 182 }; 183 184 void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row) 185 { 186 struct vidconsole_priv *priv = dev_get_uclass_priv(dev); 187 188 priv->curr_col = min_t(short, col, priv->cols - 1); 189 priv->curr_row = min_t(short, row, priv->rows - 1); 190 } 191 192 static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc, 193 char *const argv[]) 194 { 195 unsigned int col, row; 196 struct udevice *dev; 197 198 if (argc != 3) 199 return CMD_RET_USAGE; 200 201 uclass_first_device(UCLASS_VIDEO_CONSOLE, &dev); 202 if (!dev) 203 return CMD_RET_FAILURE; 204 col = simple_strtoul(argv[1], NULL, 10); 205 row = simple_strtoul(argv[2], NULL, 10); 206 vidconsole_position_cursor(dev, col, row); 207 208 return 0; 209 } 210 211 static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc, 212 char *const argv[]) 213 { 214 struct udevice *dev; 215 const char *s; 216 217 if (argc != 2) 218 return CMD_RET_USAGE; 219 220 uclass_first_device(UCLASS_VIDEO_CONSOLE, &dev); 221 if (!dev) 222 return CMD_RET_FAILURE; 223 for (s = argv[1]; *s; s++) 224 vidconsole_put_char(dev, *s); 225 226 return 0; 227 } 228 229 U_BOOT_CMD( 230 setcurs, 3, 1, do_video_setcursor, 231 "set cursor position within screen", 232 " <col> <row> in character" 233 ); 234 235 U_BOOT_CMD( 236 lcdputs, 2, 1, do_video_puts, 237 "print string on video framebuffer", 238 " <string>" 239 ); 240