git.sur5r.net Git - u-boot/blob - drivers/video/vidconsole-uclass.c

   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 );