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
8 * SPDX-License-Identifier: GPL-2.0+
14 #include <video_console.h>
15 #include <video_font.h> /* Get font data, width and height */
17 /* By default we scroll by a single line */
18 #ifndef CONFIG_CONSOLE_SCROLL_LINES
19 #define CONFIG_CONSOLE_SCROLL_LINES 1
22 int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch)
24 struct vidconsole_ops *ops = vidconsole_get_ops(dev);
28 return ops->putc_xy(dev, x, y, ch);
31 int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc,
34 struct vidconsole_ops *ops = vidconsole_get_ops(dev);
38 return ops->move_rows(dev, rowdst, rowsrc, count);
41 int vidconsole_set_row(struct udevice *dev, uint row, int clr)
43 struct vidconsole_ops *ops = vidconsole_get_ops(dev);
47 return ops->set_row(dev, row, clr);
50 /* Move backwards one space */
51 static void vidconsole_back(struct udevice *dev)
53 struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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;
65 /* Move to a newline, scrolling the display if necessary */
66 static void vidconsole_newline(struct udevice *dev)
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;
74 priv->xcur_frac = priv->xstart_frac;
75 priv->ycur += priv->y_charsize;
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,
83 priv->ycur -= rows * priv->y_charsize;
85 video_sync(dev->parent);
88 int vidconsole_put_char(struct udevice *dev, char ch)
90 struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
98 priv->xcur_frac = priv->xstart_frac;
101 vidconsole_newline(dev);
103 case '\t': /* Tab (8 chars alignment) */
104 priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac)
105 + 1) * priv->tab_width_frac;
107 if (priv->xcur_frac >= priv->xsize_frac)
108 vidconsole_newline(dev);
111 vidconsole_back(dev);
115 * Failure of this function normally indicates an unsupported
116 * colour depth. Check this and return an error to help with
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,
127 priv->xcur_frac += ret;
128 if (priv->xcur_frac >= priv->xsize_frac)
129 vidconsole_newline(dev);
136 static void vidconsole_putc(struct stdio_dev *sdev, const char ch)
138 struct udevice *dev = sdev->priv;
140 vidconsole_put_char(dev, ch);
143 static void vidconsole_puts(struct stdio_dev *sdev, const char *s)
145 struct udevice *dev = sdev->priv;
148 vidconsole_put_char(dev, *s++);
151 /* Set up the number of rows and colours (rotated drivers override this) */
152 static int vidconsole_pre_probe(struct udevice *dev)
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);
158 priv->xsize_frac = VID_TO_POS(vid_priv->xsize);
163 /* Register the device with stdio */
164 static int vidconsole_post_probe(struct udevice *dev)
166 struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
167 struct stdio_dev *sdev = &priv->sdev;
170 if (!priv->tab_width_frac)
171 priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8;
174 snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d",
177 strcpy(sdev->name, "vidconsole");
180 sdev->flags = DEV_FLAGS_OUTPUT;
181 sdev->putc = vidconsole_putc;
182 sdev->puts = vidconsole_puts;
184 ret = stdio_register(sdev);
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),
199 void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row)
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);
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);
209 static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc,
212 unsigned int col, row;
216 return CMD_RET_USAGE;
218 uclass_first_device(UCLASS_VIDEO_CONSOLE, &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);
228 static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc,
235 return CMD_RET_USAGE;
237 uclass_first_device(UCLASS_VIDEO_CONSOLE, &dev);
239 return CMD_RET_FAILURE;
240 for (s = argv[1]; *s; s++)
241 vidconsole_put_char(dev, *s);
247 setcurs, 3, 1, do_video_setcursor,
248 "set cursor position within screen",
249 " <col> <row> in character"
253 lcdputs, 2, 1, do_video_puts,
254 "print string on video framebuffer",