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 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 );