2 * Copyright (c) 2015 Google, Inc
4 * SPDX-License-Identifier: GPL-2.0+
7 #ifndef __video_console_h
8 #define __video_console_h
12 #define VID_FRAC_DIV 256
14 #define VID_TO_PIXEL(x) ((x) / VID_FRAC_DIV)
15 #define VID_TO_POS(x) ((x) * VID_FRAC_DIV)
18 * The 8 colors supported by the console
34 * struct vidconsole_priv - uclass-private data about a console device
36 * Drivers must set up @rows, @cols, @x_charsize, @y_charsize in their probe()
37 * method. Drivers may set up @xstart_frac if desired.
39 * @sdev: stdio device, acting as an output sink
40 * @xcur_frac: Current X position, in fractional units (VID_TO_POS(x))
41 * @curr_row: Current Y position in pixels (0=top)
42 * @rows: Number of text rows
43 * @cols: Number of text columns
44 * @x_charsize: Character width in pixels
45 * @y_charsize: Character height in pixels
46 * @tab_width_frac: Tab width in fractional units
47 * @xsize_frac: Width of the display in fractional units
48 * @xstart_frac: Left margin for the text console in fractional units
49 * @last_ch: Last character written to the text console on this line
50 * @escape: TRUE if currently accumulating an ANSI escape sequence
51 * @escape_len: Length of accumulated escape sequence so far
52 * @escape_buf: Buffer to accumulate escape sequence
54 struct vidconsole_priv {
55 struct stdio_dev sdev;
67 * ANSI escape sequences are accumulated character by character,
68 * starting after the ESC char (0x1b) until the entire sequence
69 * is consumed at which point it is acted upon.
77 * struct vidconsole_ops - Video console operations
79 * These operations work on either an absolute console position (measured
80 * in pixels) or a text row number (measured in rows, where each row consists
81 * of an entire line of text - typically 16 pixels).
83 struct vidconsole_ops {
85 * putc_xy() - write a single character to a position
87 * @dev: Device to write to
88 * @x_frac: Fractional pixel X position (0=left-most pixel) which
89 * is the X position multipled by VID_FRAC_DIV.
90 * @y: Pixel Y position (0=top-most pixel)
91 * @ch: Character to write
92 * @return number of fractional pixels that the cursor should move,
93 * if all is OK, -EAGAIN if we ran out of space on this line, other -ve
96 int (*putc_xy)(struct udevice *dev, uint x_frac, uint y, char ch);
99 * move_rows() - Move text rows from one place to another
101 * @dev: Device to adjust
102 * @rowdst: Destination text row (0=top)
103 * @rowsrc: Source start text row
104 * @count: Number of text rows to move
105 * @return 0 if OK, -ve on error
107 int (*move_rows)(struct udevice *dev, uint rowdst, uint rowsrc,
111 * set_row() - Set the colour of a text row
113 * Every pixel contained within the text row is adjusted
115 * @dev: Device to adjust
116 * @row: Text row to adjust (0=top)
117 * @clr: Raw colour (pixel value) to write to each pixel
118 * @return 0 if OK, -ve on error
120 int (*set_row)(struct udevice *dev, uint row, int clr);
123 * entry_start() - Indicate that text entry is starting afresh
125 * Consoles which use proportional fonts need to track the position of
126 * each character output so that backspace will return to the correct
127 * place. This method signals to the console driver that a new entry
128 * line is being start (e.g. the user pressed return to start a new
129 * command). The driver can use this signal to empty its list of
132 int (*entry_start)(struct udevice *dev);
135 * backspace() - Handle erasing the last character
137 * With proportional fonts the vidconsole uclass cannot itself erase
138 * the previous character. This optional method will be called when
139 * a backspace is needed. The driver should erase the previous
140 * character and update the cursor position (xcur_frac, ycur) to the
141 * start of the previous character.
143 * If not implement, default behaviour will work for fixed-width
146 int (*backspace)(struct udevice *dev);
149 /* Get a pointer to the driver operations for a video console device */
150 #define vidconsole_get_ops(dev) ((struct vidconsole_ops *)(dev)->driver->ops)
153 * vidconsole_putc_xy() - write a single character to a position
155 * @dev: Device to write to
156 * @x_frac: Fractional pixel X position (0=left-most pixel) which
157 * is the X position multipled by VID_FRAC_DIV.
158 * @y: Pixel Y position (0=top-most pixel)
159 * @ch: Character to write
160 * @return number of fractional pixels that the cursor should move,
161 * if all is OK, -EAGAIN if we ran out of space on this line, other -ve
164 int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch);
167 * vidconsole_move_rows() - Move text rows from one place to another
169 * @dev: Device to adjust
170 * @rowdst: Destination text row (0=top)
171 * @rowsrc: Source start text row
172 * @count: Number of text rows to move
173 * @return 0 if OK, -ve on error
175 int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc,
179 * vidconsole_set_row() - Set the colour of a text row
181 * Every pixel contained within the text row is adjusted
183 * @dev: Device to adjust
184 * @row: Text row to adjust (0=top)
185 * @clr: Raw colour (pixel value) to write to each pixel
186 * @return 0 if OK, -ve on error
188 int vidconsole_set_row(struct udevice *dev, uint row, int clr);
191 * vidconsole_put_char() - Output a character to the current console position
193 * Outputs a character to the console and advances the cursor. This function
194 * handles wrapping to new lines and scrolling the console. Special
195 * characters are handled also: \n, \r, \b and \t.
197 * The device always starts with the cursor at position 0,0 (top left). It
198 * can be adjusted manually using vidconsole_position_cursor().
200 * @dev: Device to adjust
201 * @ch: Character to write
202 * @return 0 if OK, -ve on error
204 int vidconsole_put_char(struct udevice *dev, char ch);
207 * vidconsole_position_cursor() - Move the text cursor
209 * @dev: Device to adjust
210 * @col: New cursor text column
211 * @row: New cursor text row
212 * @return 0 if OK, -ve on error
214 void vidconsole_position_cursor(struct udevice *dev, unsigned col,
217 #ifdef CONFIG_DM_VIDEO
220 * vid_console_color() - convert a color code to a pixel's internal
223 * The caller has to guarantee that the color index is less than
226 * @priv private data of the console device
228 * @return color value
230 u32 vid_console_color(struct video_priv *priv, unsigned int idx);