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 < 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 );