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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2015 Google, Inc
- * (C) Copyright 2001-2015
- * DENX Software Engineering -- wd@denx.de
- * Compulab Ltd - http://compulab.co.il/
- * Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
- */
- #include <common.h>
- #include <command.h>
- #include <console.h>
- #include <log.h>
- #include <dm.h>
- #include <video.h>
- #include <video_console.h>
- #include <video_font.h> /* Bitmap font for code page 437 */
- #include <linux/ctype.h>
- /*
- * Structure to describe a console color
- */
- struct vid_rgb {
- u32 r;
- u32 g;
- u32 b;
- };
- /* By default we scroll by a single line */
- #ifndef CONFIG_CONSOLE_SCROLL_LINES
- #define CONFIG_CONSOLE_SCROLL_LINES 1
- #endif
- int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch)
- {
- struct vidconsole_ops *ops = vidconsole_get_ops(dev);
- if (!ops->putc_xy)
- return -ENOSYS;
- return ops->putc_xy(dev, x, y, ch);
- }
- int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc,
- uint count)
- {
- struct vidconsole_ops *ops = vidconsole_get_ops(dev);
- if (!ops->move_rows)
- return -ENOSYS;
- return ops->move_rows(dev, rowdst, rowsrc, count);
- }
- int vidconsole_set_row(struct udevice *dev, uint row, int clr)
- {
- struct vidconsole_ops *ops = vidconsole_get_ops(dev);
- if (!ops->set_row)
- return -ENOSYS;
- return ops->set_row(dev, row, clr);
- }
- static int vidconsole_entry_start(struct udevice *dev)
- {
- struct vidconsole_ops *ops = vidconsole_get_ops(dev);
- if (!ops->entry_start)
- return -ENOSYS;
- return ops->entry_start(dev);
- }
- /* Move backwards one space */
- static int vidconsole_back(struct udevice *dev)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- struct vidconsole_ops *ops = vidconsole_get_ops(dev);
- int ret;
- if (ops->backspace) {
- ret = ops->backspace(dev);
- if (ret != -ENOSYS)
- return ret;
- }
- priv->xcur_frac -= VID_TO_POS(priv->x_charsize);
- if (priv->xcur_frac < priv->xstart_frac) {
- priv->xcur_frac = (priv->cols - 1) *
- VID_TO_POS(priv->x_charsize);
- priv->ycur -= priv->y_charsize;
- if (priv->ycur < 0)
- priv->ycur = 0;
- }
- video_sync(dev->parent, false);
- return 0;
- }
- /* Move to a newline, scrolling the display if necessary */
- static void vidconsole_newline(struct udevice *dev)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- struct udevice *vid_dev = dev->parent;
- struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
- const int rows = CONFIG_CONSOLE_SCROLL_LINES;
- int i;
- priv->xcur_frac = priv->xstart_frac;
- priv->ycur += priv->y_charsize;
- /* Check if we need to scroll the terminal */
- if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) {
- vidconsole_move_rows(dev, 0, rows, priv->rows - rows);
- for (i = 0; i < rows; i++)
- vidconsole_set_row(dev, priv->rows - i - 1,
- vid_priv->colour_bg);
- priv->ycur -= rows * priv->y_charsize;
- }
- priv->last_ch = 0;
- video_sync(dev->parent, false);
- }
- static const struct vid_rgb colors[VID_COLOR_COUNT] = {
- { 0x00, 0x00, 0x00 }, /* black */
- { 0xc0, 0x00, 0x00 }, /* red */
- { 0x00, 0xc0, 0x00 }, /* green */
- { 0xc0, 0x60, 0x00 }, /* brown */
- { 0x00, 0x00, 0xc0 }, /* blue */
- { 0xc0, 0x00, 0xc0 }, /* magenta */
- { 0x00, 0xc0, 0xc0 }, /* cyan */
- { 0xc0, 0xc0, 0xc0 }, /* light gray */
- { 0x80, 0x80, 0x80 }, /* gray */
- { 0xff, 0x00, 0x00 }, /* bright red */
- { 0x00, 0xff, 0x00 }, /* bright green */
- { 0xff, 0xff, 0x00 }, /* yellow */
- { 0x00, 0x00, 0xff }, /* bright blue */
- { 0xff, 0x00, 0xff }, /* bright magenta */
- { 0x00, 0xff, 0xff }, /* bright cyan */
- { 0xff, 0xff, 0xff }, /* white */
- };
- u32 vid_console_color(struct video_priv *priv, unsigned int idx)
- {
- switch (priv->bpix) {
- case VIDEO_BPP16:
- if (CONFIG_IS_ENABLED(VIDEO_BPP16)) {
- return ((colors[idx].r >> 3) << 11) |
- ((colors[idx].g >> 2) << 5) |
- ((colors[idx].b >> 3) << 0);
- }
- break;
- case VIDEO_BPP32:
- if (CONFIG_IS_ENABLED(VIDEO_BPP32)) {
- return (colors[idx].r << 16) |
- (colors[idx].g << 8) |
- (colors[idx].b << 0);
- }
- break;
- default:
- break;
- }
- /*
- * For unknown bit arrangements just support
- * black and white.
- */
- if (idx)
- return 0xffffff; /* white */
- return 0x000000; /* black */
- }
- static char *parsenum(char *s, int *num)
- {
- char *end;
- *num = simple_strtol(s, &end, 10);
- return end;
- }
- /**
- * set_cursor_position() - set cursor position
- *
- * @priv: private data of the video console
- * @row: new row
- * @col: new column
- */
- static void set_cursor_position(struct vidconsole_priv *priv, int row, int col)
- {
- /*
- * Ensure we stay in the bounds of the screen.
- */
- if (row >= priv->rows)
- row = priv->rows - 1;
- if (col >= priv->cols)
- col = priv->cols - 1;
- priv->ycur = row * priv->y_charsize;
- priv->xcur_frac = priv->xstart_frac +
- VID_TO_POS(col * priv->x_charsize);
- }
- /**
- * get_cursor_position() - get cursor position
- *
- * @priv: private data of the video console
- * @row: row
- * @col: column
- */
- static void get_cursor_position(struct vidconsole_priv *priv,
- int *row, int *col)
- {
- *row = priv->ycur / priv->y_charsize;
- *col = VID_TO_PIXEL(priv->xcur_frac - priv->xstart_frac) /
- priv->x_charsize;
- }
- /*
- * Process a character while accumulating an escape string. Chars are
- * accumulated into escape_buf until the end of escape sequence is
- * found, at which point the sequence is parsed and processed.
- */
- static void vidconsole_escape_char(struct udevice *dev, char ch)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- if (!IS_ENABLED(CONFIG_VIDEO_ANSI))
- goto error;
- /* Sanity checking for bogus ESC sequences: */
- if (priv->escape_len >= sizeof(priv->escape_buf))
- goto error;
- if (priv->escape_len == 0) {
- switch (ch) {
- case '7':
- /* Save cursor position */
- get_cursor_position(priv, &priv->row_saved,
- &priv->col_saved);
- priv->escape = 0;
- return;
- case '8': {
- /* Restore cursor position */
- int row = priv->row_saved;
- int col = priv->col_saved;
- set_cursor_position(priv, row, col);
- priv->escape = 0;
- return;
- }
- case '[':
- break;
- default:
- goto error;
- }
- }
- priv->escape_buf[priv->escape_len++] = ch;
- /*
- * Escape sequences are terminated by a letter, so keep
- * accumulating until we get one:
- */
- if (!isalpha(ch))
- return;
- /*
- * clear escape mode first, otherwise things will get highly
- * surprising if you hit any debug prints that come back to
- * this console.
- */
- priv->escape = 0;
- switch (ch) {
- case 'A':
- case 'B':
- case 'C':
- case 'D':
- case 'E':
- case 'F': {
- int row, col, num;
- char *s = priv->escape_buf;
- /*
- * Cursor up/down: [%dA, [%dB, [%dE, [%dF
- * Cursor left/right: [%dD, [%dC
- */
- s++; /* [ */
- s = parsenum(s, &num);
- if (num == 0) /* No digit in sequence ... */
- num = 1; /* ... means "move by 1". */
- get_cursor_position(priv, &row, &col);
- if (ch == 'A' || ch == 'F')
- row -= num;
- if (ch == 'C')
- col += num;
- if (ch == 'D')
- col -= num;
- if (ch == 'B' || ch == 'E')
- row += num;
- if (ch == 'E' || ch == 'F')
- col = 0;
- if (col < 0)
- col = 0;
- if (row < 0)
- row = 0;
- /* Right and bottom overflows are handled in the callee. */
- set_cursor_position(priv, row, col);
- break;
- }
- case 'H':
- case 'f': {
- int row, col;
- char *s = priv->escape_buf;
- /*
- * Set cursor position: [%d;%df or [%d;%dH
- */
- s++; /* [ */
- s = parsenum(s, &row);
- s++; /* ; */
- s = parsenum(s, &col);
- /*
- * Video origin is [0, 0], terminal origin is [1, 1].
- */
- if (row)
- --row;
- if (col)
- --col;
- set_cursor_position(priv, row, col);
- break;
- }
- case 'J': {
- int mode;
- /*
- * Clear part/all screen:
- * [J or [0J - clear screen from cursor down
- * [1J - clear screen from cursor up
- * [2J - clear entire screen
- *
- * TODO we really only handle entire-screen case, others
- * probably require some additions to video-uclass (and
- * are not really needed yet by efi_console)
- */
- parsenum(priv->escape_buf + 1, &mode);
- if (mode == 2) {
- video_clear(dev->parent);
- video_sync(dev->parent, false);
- priv->ycur = 0;
- priv->xcur_frac = priv->xstart_frac;
- } else {
- debug("unsupported clear mode: %d\n", mode);
- }
- break;
- }
- case 'K': {
- struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
- int mode;
- /*
- * Clear (parts of) current line
- * [0K - clear line to end
- * [2K - clear entire line
- */
- parsenum(priv->escape_buf + 1, &mode);
- if (mode == 2) {
- int row, col;
- get_cursor_position(priv, &row, &col);
- vidconsole_set_row(dev, row, vid_priv->colour_bg);
- }
- break;
- }
- case 'm': {
- struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
- char *s = priv->escape_buf;
- char *end = &priv->escape_buf[priv->escape_len];
- /*
- * Set graphics mode: [%d;...;%dm
- *
- * Currently only supports the color attributes:
- *
- * Foreground Colors:
- *
- * 30 Black
- * 31 Red
- * 32 Green
- * 33 Yellow
- * 34 Blue
- * 35 Magenta
- * 36 Cyan
- * 37 White
- *
- * Background Colors:
- *
- * 40 Black
- * 41 Red
- * 42 Green
- * 43 Yellow
- * 44 Blue
- * 45 Magenta
- * 46 Cyan
- * 47 White
- */
- s++; /* [ */
- while (s < end) {
- int val;
- s = parsenum(s, &val);
- s++;
- switch (val) {
- case 0:
- /* all attributes off */
- video_set_default_colors(dev->parent, false);
- break;
- case 1:
- /* bold */
- vid_priv->fg_col_idx |= 8;
- vid_priv->colour_fg = vid_console_color(
- vid_priv, vid_priv->fg_col_idx);
- break;
- case 7:
- /* reverse video */
- vid_priv->colour_fg = vid_console_color(
- vid_priv, vid_priv->bg_col_idx);
- vid_priv->colour_bg = vid_console_color(
- vid_priv, vid_priv->fg_col_idx);
- break;
- case 30 ... 37:
- /* foreground color */
- vid_priv->fg_col_idx &= ~7;
- vid_priv->fg_col_idx |= val - 30;
- vid_priv->colour_fg = vid_console_color(
- vid_priv, vid_priv->fg_col_idx);
- break;
- case 40 ... 47:
- /* background color, also mask the bold bit */
- vid_priv->bg_col_idx &= ~0xf;
- vid_priv->bg_col_idx |= val - 40;
- vid_priv->colour_bg = vid_console_color(
- vid_priv, vid_priv->bg_col_idx);
- break;
- default:
- /* ignore unsupported SGR parameter */
- break;
- }
- }
- break;
- }
- default:
- debug("unrecognized escape sequence: %*s\n",
- priv->escape_len, priv->escape_buf);
- }
- return;
- error:
- /* something went wrong, just revert to normal mode: */
- priv->escape = 0;
- }
- /* Put that actual character on the screen (using the CP437 code page). */
- static int vidconsole_output_glyph(struct udevice *dev, char ch)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- int ret;
- /*
- * Failure of this function normally indicates an unsupported
- * colour depth. Check this and return an error to help with
- * diagnosis.
- */
- ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch);
- if (ret == -EAGAIN) {
- vidconsole_newline(dev);
- ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch);
- }
- if (ret < 0)
- return ret;
- priv->xcur_frac += ret;
- priv->last_ch = ch;
- if (priv->xcur_frac >= priv->xsize_frac)
- vidconsole_newline(dev);
- return 0;
- }
- int vidconsole_put_char(struct udevice *dev, char ch)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- int ret;
- if (priv->escape) {
- vidconsole_escape_char(dev, ch);
- return 0;
- }
- switch (ch) {
- case '\x1b':
- priv->escape_len = 0;
- priv->escape = 1;
- break;
- case '\a':
- /* beep */
- break;
- case '\r':
- priv->xcur_frac = priv->xstart_frac;
- break;
- case '\n':
- vidconsole_newline(dev);
- vidconsole_entry_start(dev);
- break;
- case '\t': /* Tab (8 chars alignment) */
- priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac)
- + 1) * priv->tab_width_frac;
- if (priv->xcur_frac >= priv->xsize_frac)
- vidconsole_newline(dev);
- break;
- case '\b':
- vidconsole_back(dev);
- priv->last_ch = 0;
- break;
- default:
- ret = vidconsole_output_glyph(dev, ch);
- if (ret < 0)
- return ret;
- break;
- }
- return 0;
- }
- int vidconsole_put_string(struct udevice *dev, const char *str)
- {
- const char *s;
- int ret;
- for (s = str; *s; s++) {
- ret = vidconsole_put_char(dev, *s);
- if (ret)
- return ret;
- }
- return 0;
- }
- static void vidconsole_putc(struct stdio_dev *sdev, const char ch)
- {
- struct udevice *dev = sdev->priv;
- int ret;
- ret = vidconsole_put_char(dev, ch);
- if (ret) {
- #ifdef DEBUG
- console_puts_select_stderr(true, "[vc err: putc]");
- #endif
- }
- video_sync(dev->parent, false);
- }
- static void vidconsole_puts(struct stdio_dev *sdev, const char *s)
- {
- struct udevice *dev = sdev->priv;
- int ret;
- ret = vidconsole_put_string(dev, s);
- if (ret) {
- #ifdef DEBUG
- char str[30];
- snprintf(str, sizeof(str), "[vc err: puts %d]", ret);
- console_puts_select_stderr(true, str);
- #endif
- }
- video_sync(dev->parent, false);
- }
- /* Set up the number of rows and colours (rotated drivers override this) */
- static int vidconsole_pre_probe(struct udevice *dev)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- struct udevice *vid = dev->parent;
- struct video_priv *vid_priv = dev_get_uclass_priv(vid);
- priv->xsize_frac = VID_TO_POS(vid_priv->xsize);
- return 0;
- }
- /* Register the device with stdio */
- static int vidconsole_post_probe(struct udevice *dev)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- struct stdio_dev *sdev = &priv->sdev;
- if (!priv->tab_width_frac)
- priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8;
- if (dev_seq(dev)) {
- snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d",
- dev_seq(dev));
- } else {
- strcpy(sdev->name, "vidconsole");
- }
- sdev->flags = DEV_FLAGS_OUTPUT;
- sdev->putc = vidconsole_putc;
- sdev->puts = vidconsole_puts;
- sdev->priv = dev;
- return stdio_register(sdev);
- }
- UCLASS_DRIVER(vidconsole) = {
- .id = UCLASS_VIDEO_CONSOLE,
- .name = "vidconsole0",
- .pre_probe = vidconsole_pre_probe,
- .post_probe = vidconsole_post_probe,
- .per_device_auto = sizeof(struct vidconsole_priv),
- };
- #ifdef CONFIG_VIDEO_COPY
- int vidconsole_sync_copy(struct udevice *dev, void *from, void *to)
- {
- struct udevice *vid = dev_get_parent(dev);
- return video_sync_copy(vid, from, to);
- }
- int vidconsole_memmove(struct udevice *dev, void *dst, const void *src,
- int size)
- {
- memmove(dst, src, size);
- return vidconsole_sync_copy(dev, dst, dst + size);
- }
- #endif
- #if CONFIG_IS_ENABLED(CMD_VIDCONSOLE)
- void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row)
- {
- struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- struct udevice *vid_dev = dev->parent;
- struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
- col *= priv->x_charsize;
- row *= priv->y_charsize;
- priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1));
- priv->xstart_frac = priv->xcur_frac;
- priv->ycur = min_t(short, row, vid_priv->ysize - 1);
- }
- static int do_video_setcursor(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- unsigned int col, row;
- struct udevice *dev;
- if (argc != 3)
- return CMD_RET_USAGE;
- if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev))
- return CMD_RET_FAILURE;
- col = simple_strtoul(argv[1], NULL, 10);
- row = simple_strtoul(argv[2], NULL, 10);
- vidconsole_position_cursor(dev, col, row);
- return 0;
- }
- static int do_video_puts(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- struct udevice *dev;
- const char *s;
- if (argc != 2)
- return CMD_RET_USAGE;
- if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev))
- return CMD_RET_FAILURE;
- for (s = argv[1]; *s; s++)
- vidconsole_put_char(dev, *s);
- video_sync(dev->parent, false);
- return 0;
- }
- U_BOOT_CMD(
- setcurs, 3, 1, do_video_setcursor,
- "set cursor position within screen",
- " <col> <row> in character"
- );
- U_BOOT_CMD(
- lcdputs, 2, 1, do_video_puts,
- "print string on video framebuffer",
- " <string>"
- );
- #endif /* CONFIG_IS_ENABLED(CMD_VIDCONSOLE) */
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