| // 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 <linux/ctype.h> |
| #include <dm.h> |
| #include <video.h> |
| #include <video_console.h> |
| #include <video_font.h> /* Bitmap font for code page 437 */ |
| |
| /* |
| * 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: |
| return ((colors[idx].r >> 3) << 11) | |
| ((colors[idx].g >> 2) << 5) | |
| ((colors[idx].b >> 3) << 0); |
| case VIDEO_BPP32: |
| return (colors[idx].r << 16) | |
| (colors[idx].g << 8) | |
| (colors[idx].b << 0); |
| default: |
| /* |
| * For unknown bit arrangements just support |
| * black and white. |
| */ |
| if (idx) |
| return 0xffffff; /* white */ |
| else |
| 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 '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); |
| |
| 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 '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 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 */ |
| vid_priv->colour_bg = vid_console_color( |
| vid_priv, val - 40); |
| 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; |
| } |
| |
| 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: |
| /* |
| * 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); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static void vidconsole_putc(struct stdio_dev *sdev, const char ch) |
| { |
| struct udevice *dev = sdev->priv; |
| |
| vidconsole_put_char(dev, ch); |
| video_sync(dev->parent, false); |
| } |
| |
| static void vidconsole_puts(struct stdio_dev *sdev, const char *s) |
| { |
| struct udevice *dev = sdev->priv; |
| |
| while (*s) |
| vidconsole_put_char(dev, *s++); |
| 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) { |
| snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d", |
| dev->seq); |
| } 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_alloc_size = sizeof(struct vidconsole_priv), |
| }; |
| |
| 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->ycur = min_t(short, row, vid_priv->ysize - 1); |
| } |
| |
| static int do_video_setcursor(cmd_tbl_t *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(cmd_tbl_t *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>" |
| ); |