mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
![Rob Clark](/assets/img/avatar_default.png)
Note that this doesn't differentiate (due to lack of information in video_priv) between different possible component orders for 32bpp. But the main user at this point is efi_loader, and GOP expects xBGR so any video drivers that this is incorrect for already have problems. (Also, conveniently, this matches what simple-framebuffer bindings expect for kernels that use the simple-framebuffer DT binding to take over the bootloader display.) Signed-off-by: Rob Clark <robdclark@gmail.com>
482 lines
11 KiB
C
482 lines
11 KiB
C
/*
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* Copyright (c) 2015 Google, Inc
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* (C) Copyright 2001-2015
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* DENX Software Engineering -- wd@denx.de
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* Compulab Ltd - http://compulab.co.il/
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* Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <linux/ctype.h>
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#include <dm.h>
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#include <video.h>
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#include <video_console.h>
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#include <video_font.h> /* Get font data, width and height */
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/* By default we scroll by a single line */
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#ifndef CONFIG_CONSOLE_SCROLL_LINES
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#define CONFIG_CONSOLE_SCROLL_LINES 1
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#endif
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int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch)
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{
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struct vidconsole_ops *ops = vidconsole_get_ops(dev);
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if (!ops->putc_xy)
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return -ENOSYS;
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return ops->putc_xy(dev, x, y, ch);
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}
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int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc,
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uint count)
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{
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struct vidconsole_ops *ops = vidconsole_get_ops(dev);
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if (!ops->move_rows)
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return -ENOSYS;
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return ops->move_rows(dev, rowdst, rowsrc, count);
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}
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int vidconsole_set_row(struct udevice *dev, uint row, int clr)
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{
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struct vidconsole_ops *ops = vidconsole_get_ops(dev);
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if (!ops->set_row)
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return -ENOSYS;
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return ops->set_row(dev, row, clr);
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}
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static int vidconsole_entry_start(struct udevice *dev)
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{
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struct vidconsole_ops *ops = vidconsole_get_ops(dev);
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if (!ops->entry_start)
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return -ENOSYS;
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return ops->entry_start(dev);
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}
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/* Move backwards one space */
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static int vidconsole_back(struct udevice *dev)
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{
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struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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struct vidconsole_ops *ops = vidconsole_get_ops(dev);
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int ret;
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if (ops->backspace) {
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ret = ops->backspace(dev);
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if (ret != -ENOSYS)
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return ret;
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}
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priv->xcur_frac -= VID_TO_POS(priv->x_charsize);
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if (priv->xcur_frac < priv->xstart_frac) {
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priv->xcur_frac = (priv->cols - 1) *
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VID_TO_POS(priv->x_charsize);
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priv->ycur -= priv->y_charsize;
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if (priv->ycur < 0)
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priv->ycur = 0;
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}
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video_sync(dev->parent);
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return 0;
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}
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/* Move to a newline, scrolling the display if necessary */
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static void vidconsole_newline(struct udevice *dev)
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{
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struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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struct udevice *vid_dev = dev->parent;
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struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
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const int rows = CONFIG_CONSOLE_SCROLL_LINES;
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int i;
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priv->xcur_frac = priv->xstart_frac;
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priv->ycur += priv->y_charsize;
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/* Check if we need to scroll the terminal */
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if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) {
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vidconsole_move_rows(dev, 0, rows, priv->rows - rows);
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for (i = 0; i < rows; i++)
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vidconsole_set_row(dev, priv->rows - i - 1,
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vid_priv->colour_bg);
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priv->ycur -= rows * priv->y_charsize;
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}
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priv->last_ch = 0;
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video_sync(dev->parent);
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}
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static const struct {
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unsigned r;
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unsigned g;
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unsigned b;
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} colors[] = {
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{ 0x00, 0x00, 0x00 }, /* black */
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{ 0xff, 0x00, 0x00 }, /* red */
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{ 0x00, 0xff, 0x00 }, /* green */
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{ 0xff, 0xff, 0x00 }, /* yellow */
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{ 0x00, 0x00, 0xff }, /* blue */
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{ 0xff, 0x00, 0xff }, /* magenta */
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{ 0x00, 0xff, 0xff }, /* cyan */
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{ 0xff, 0xff, 0xff }, /* white */
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};
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static void set_color(struct video_priv *priv, unsigned idx, unsigned *c)
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{
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switch (priv->bpix) {
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case VIDEO_BPP16:
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*c = ((colors[idx].r >> 3) << 0) |
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((colors[idx].g >> 2) << 5) |
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((colors[idx].b >> 3) << 11);
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break;
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case VIDEO_BPP32:
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*c = 0xff000000 |
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(colors[idx].r << 0) |
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(colors[idx].g << 8) |
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(colors[idx].b << 16);
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break;
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default:
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/* unsupported, leave current color in place */
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break;
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}
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}
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static char *parsenum(char *s, int *num)
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{
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char *end;
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*num = simple_strtol(s, &end, 10);
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return end;
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}
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/*
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* Process a character while accumulating an escape string. Chars are
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* accumulated into escape_buf until the end of escape sequence is
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* found, at which point the sequence is parsed and processed.
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*/
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static void vidconsole_escape_char(struct udevice *dev, char ch)
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{
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struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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if (!IS_ENABLED(CONFIG_VIDEO_ANSI))
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goto error;
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/* Sanity checking for bogus ESC sequences: */
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if (priv->escape_len >= sizeof(priv->escape_buf))
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goto error;
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if (priv->escape_len == 0 && ch != '[')
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goto error;
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priv->escape_buf[priv->escape_len++] = ch;
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/*
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* Escape sequences are terminated by a letter, so keep
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* accumulating until we get one:
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*/
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if (!isalpha(ch))
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return;
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/*
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* clear escape mode first, otherwise things will get highly
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* surprising if you hit any debug prints that come back to
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* this console.
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*/
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priv->escape = 0;
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switch (ch) {
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case 'H':
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case 'f': {
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int row, col;
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char *s = priv->escape_buf;
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/*
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* Set cursor position: [%d;%df or [%d;%dH
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*/
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s++; /* [ */
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s = parsenum(s, &row);
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s++; /* ; */
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s = parsenum(s, &col);
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priv->ycur = row * priv->y_charsize;
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priv->xcur_frac = priv->xstart_frac +
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VID_TO_POS(col * priv->x_charsize);
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break;
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}
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case 'J': {
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int mode;
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/*
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* Clear part/all screen:
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* [J or [0J - clear screen from cursor down
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* [1J - clear screen from cursor up
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* [2J - clear entire screen
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*
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* TODO we really only handle entire-screen case, others
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* probably require some additions to video-uclass (and
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* are not really needed yet by efi_console)
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*/
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parsenum(priv->escape_buf + 1, &mode);
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if (mode == 2) {
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video_clear(dev->parent);
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video_sync(dev->parent);
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priv->ycur = 0;
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priv->xcur_frac = priv->xstart_frac;
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} else {
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debug("unsupported clear mode: %d\n", mode);
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}
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break;
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}
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case 'm': {
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struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
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char *s = priv->escape_buf;
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char *end = &priv->escape_buf[priv->escape_len];
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/*
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* Set graphics mode: [%d;...;%dm
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*
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* Currently only supports the color attributes:
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*
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* Foreground Colors:
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*
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* 30 Black
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* 31 Red
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* 32 Green
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* 33 Yellow
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* 34 Blue
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* 35 Magenta
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* 36 Cyan
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* 37 White
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*
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* Background Colors:
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*
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* 40 Black
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* 41 Red
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* 42 Green
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* 43 Yellow
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* 44 Blue
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* 45 Magenta
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* 46 Cyan
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* 47 White
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*/
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s++; /* [ */
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while (s < end) {
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int val;
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s = parsenum(s, &val);
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s++;
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switch (val) {
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case 30 ... 37:
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/* fg color */
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set_color(vid_priv, val - 30,
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(unsigned *)&vid_priv->colour_fg);
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break;
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case 40 ... 47:
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/* bg color */
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set_color(vid_priv, val - 40,
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(unsigned *)&vid_priv->colour_bg);
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break;
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default:
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/* unknown/unsupported */
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break;
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}
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}
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break;
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}
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default:
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debug("unrecognized escape sequence: %*s\n",
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priv->escape_len, priv->escape_buf);
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}
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return;
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error:
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/* something went wrong, just revert to normal mode: */
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priv->escape = 0;
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}
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int vidconsole_put_char(struct udevice *dev, char ch)
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{
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struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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int ret;
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if (priv->escape) {
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vidconsole_escape_char(dev, ch);
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return 0;
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}
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switch (ch) {
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case '\x1b':
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priv->escape_len = 0;
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priv->escape = 1;
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break;
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case '\a':
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/* beep */
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break;
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case '\r':
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priv->xcur_frac = priv->xstart_frac;
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break;
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case '\n':
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vidconsole_newline(dev);
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vidconsole_entry_start(dev);
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break;
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case '\t': /* Tab (8 chars alignment) */
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priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac)
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+ 1) * priv->tab_width_frac;
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if (priv->xcur_frac >= priv->xsize_frac)
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vidconsole_newline(dev);
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break;
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case '\b':
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vidconsole_back(dev);
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priv->last_ch = 0;
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break;
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default:
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/*
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* Failure of this function normally indicates an unsupported
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* colour depth. Check this and return an error to help with
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* diagnosis.
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*/
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ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch);
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if (ret == -EAGAIN) {
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vidconsole_newline(dev);
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ret = vidconsole_putc_xy(dev, priv->xcur_frac,
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priv->ycur, ch);
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}
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if (ret < 0)
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return ret;
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priv->xcur_frac += ret;
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priv->last_ch = ch;
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if (priv->xcur_frac >= priv->xsize_frac)
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vidconsole_newline(dev);
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break;
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}
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return 0;
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}
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static void vidconsole_putc(struct stdio_dev *sdev, const char ch)
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{
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struct udevice *dev = sdev->priv;
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vidconsole_put_char(dev, ch);
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video_sync(dev->parent);
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}
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static void vidconsole_puts(struct stdio_dev *sdev, const char *s)
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{
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struct udevice *dev = sdev->priv;
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while (*s)
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vidconsole_put_char(dev, *s++);
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video_sync(dev->parent);
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}
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/* Set up the number of rows and colours (rotated drivers override this) */
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static int vidconsole_pre_probe(struct udevice *dev)
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{
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struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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struct udevice *vid = dev->parent;
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struct video_priv *vid_priv = dev_get_uclass_priv(vid);
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priv->xsize_frac = VID_TO_POS(vid_priv->xsize);
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return 0;
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}
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/* Register the device with stdio */
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static int vidconsole_post_probe(struct udevice *dev)
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{
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struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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struct stdio_dev *sdev = &priv->sdev;
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if (!priv->tab_width_frac)
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priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8;
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if (dev->seq) {
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snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d",
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dev->seq);
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} else {
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strcpy(sdev->name, "vidconsole");
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}
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sdev->flags = DEV_FLAGS_OUTPUT;
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sdev->putc = vidconsole_putc;
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sdev->puts = vidconsole_puts;
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sdev->priv = dev;
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return stdio_register(sdev);
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}
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UCLASS_DRIVER(vidconsole) = {
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.id = UCLASS_VIDEO_CONSOLE,
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.name = "vidconsole0",
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.pre_probe = vidconsole_pre_probe,
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.post_probe = vidconsole_post_probe,
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.per_device_auto_alloc_size = sizeof(struct vidconsole_priv),
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};
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void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row)
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{
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struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
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struct udevice *vid_dev = dev->parent;
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struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
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priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1));
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priv->ycur = min_t(short, row, vid_priv->ysize - 1);
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}
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static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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unsigned int col, row;
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struct udevice *dev;
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if (argc != 3)
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return CMD_RET_USAGE;
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if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev))
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return CMD_RET_FAILURE;
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col = simple_strtoul(argv[1], NULL, 10);
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row = simple_strtoul(argv[2], NULL, 10);
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vidconsole_position_cursor(dev, col, row);
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return 0;
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}
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static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct udevice *dev;
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const char *s;
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if (argc != 2)
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return CMD_RET_USAGE;
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if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev))
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return CMD_RET_FAILURE;
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for (s = argv[1]; *s; s++)
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vidconsole_put_char(dev, *s);
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video_sync(dev->parent);
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return 0;
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}
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U_BOOT_CMD(
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setcurs, 3, 1, do_video_setcursor,
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"set cursor position within screen",
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" <col> <row> in character"
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);
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U_BOOT_CMD(
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lcdputs, 2, 1, do_video_puts,
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"print string on video framebuffer",
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" <string>"
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);
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