common/lcd_console.c

   1 /*
   2  * (C) Copyright 2001-2014
   3  * DENX Software Engineering -- wd@denx.de
   4  * Compulab Ltd - http://compulab.co.il/
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <lcd.h>
  11 #include <video_font.h>         /* Get font data, width and height */
  12
  13 #define CONSOLE_ROW_SIZE        (VIDEO_FONT_HEIGHT * lcd_line_length)
  14 #define CONSOLE_ROW_FIRST       lcd_console_address
  15 #define CONSOLE_SIZE            (CONSOLE_ROW_SIZE * console_rows)
  16
  17 static short console_curr_col;
  18 static short console_curr_row;
  19 static short console_cols;
  20 static short console_rows;
  21 static void *lcd_console_address;
  22
  23 void lcd_init_console(void *address, int rows, int cols)
  24 {
  25         console_curr_col = 0;
  26         console_curr_row = 0;
  27         console_cols = cols;
  28         console_rows = rows;
  29         lcd_console_address = address;
  30 }
  31
  32 void lcd_set_col(short col)
  33 {
  34         console_curr_col = col;
  35 }
  36
  37 void lcd_set_row(short row)
  38 {
  39         console_curr_row = row;
  40 }
  41
  42 void lcd_position_cursor(unsigned col, unsigned row)
  43 {
  44         console_curr_col = min_t(short, col, console_cols - 1);
  45         console_curr_row = min_t(short, row, console_rows - 1);
  46 }
  47
  48 int lcd_get_screen_rows(void)
  49 {
  50         return console_rows;
  51 }
  52
  53 int lcd_get_screen_columns(void)
  54 {
  55         return console_cols;
  56 }
  57
  58 static void lcd_putc_xy(ushort x, ushort y, char c)
  59 {
  60         uchar *dest;
  61         ushort row;
  62         int fg_color = lcd_getfgcolor();
  63         int bg_color = lcd_getbgcolor();
  64         int i;
  65
  66         dest = (uchar *)(lcd_console_address +
  67                          y * lcd_line_length + x * NBITS(LCD_BPP) / 8);
  68
  69         for (row = 0; row < VIDEO_FONT_HEIGHT; ++row, dest += lcd_line_length) {
  70 #if LCD_BPP == LCD_COLOR16
  71                 ushort *d = (ushort *)dest;
  72 #elif LCD_BPP == LCD_COLOR32
  73                 u32 *d = (u32 *)dest;
  74 #else
  75                 uchar *d = dest;
  76 #endif
  77                 uchar bits;
  78                 bits = video_fontdata[c * VIDEO_FONT_HEIGHT + row];
  79
  80                 for (i = 0; i < 8; ++i) {
  81                         *d++ = (bits & 0x80) ? fg_color : bg_color;
  82                         bits <<= 1;
  83                 }
  84         }
  85 }
  86
  87 static void console_scrollup(void)
  88 {
  89         const int rows = CONFIG_CONSOLE_SCROLL_LINES;
  90         int bg_color = lcd_getbgcolor();
  91
  92         /* Copy up rows ignoring those that will be overwritten */
  93         memcpy(CONSOLE_ROW_FIRST,
  94                lcd_console_address + CONSOLE_ROW_SIZE * rows,
  95                CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows);
  96
  97         /* Clear the last rows */
  98 #if (LCD_BPP != LCD_COLOR32)
  99         memset(lcd_console_address + CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows,
 100                bg_color, CONSOLE_ROW_SIZE * rows);
 101 #else
 102         u32 *ppix = lcd_console_address +
 103                     CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows;
 104         u32 i;
 105         for (i = 0;
 106             i < (CONSOLE_ROW_SIZE * rows) / NBYTES(panel_info.vl_bpix);
 107             i++) {
 108                 *ppix++ = bg_color;
 109         }
 110 #endif
 111         lcd_sync();
 112         console_curr_row -= rows;
 113 }
 114
 115 static inline void console_back(void)
 116 {
 117         if (--console_curr_col < 0) {
 118                 console_curr_col = console_cols - 1;
 119                 if (--console_curr_row < 0)
 120                         console_curr_row = 0;
 121         }
 122
 123         lcd_putc_xy(console_curr_col * VIDEO_FONT_WIDTH,
 124                     console_curr_row * VIDEO_FONT_HEIGHT, ' ');
 125 }
 126
 127 static inline void console_newline(void)
 128 {
 129         console_curr_col = 0;
 130
 131         /* Check if we need to scroll the terminal */
 132         if (++console_curr_row >= console_rows)
 133                 console_scrollup();
 134         else
 135                 lcd_sync();
 136 }
 137
 138 void lcd_putc(const char c)
 139 {
 140         if (!lcd_is_enabled) {
 141                 serial_putc(c);
 142
 143                 return;
 144         }
 145
 146         switch (c) {
 147         case '\r':
 148                 console_curr_col = 0;
 149
 150                 return;
 151         case '\n':
 152                 console_newline();
 153
 154                 return;
 155         case '\t':      /* Tab (8 chars alignment) */
 156                 console_curr_col +=  8;
 157                 console_curr_col &= ~7;
 158
 159                 if (console_curr_col >= console_cols)
 160                         console_newline();
 161
 162                 return;
 163         case '\b':
 164                 console_back();
 165
 166                 return;
 167         default:
 168                 lcd_putc_xy(console_curr_col * VIDEO_FONT_WIDTH,
 169                             console_curr_row * VIDEO_FONT_HEIGHT, c);
 170                 if (++console_curr_col >= console_cols)
 171                         console_newline();
 172         }
 173 }
 174
 175 void lcd_puts(const char *s)
 176 {
 177         if (!lcd_is_enabled) {
 178                 serial_puts(s);
 179
 180                 return;
 181         }
 182
 183         while (*s)
 184                 lcd_putc(*s++);
 185
 186         lcd_sync();
 187 }
 188
 189 void lcd_printf(const char *fmt, ...)
 190 {
 191         va_list args;
 192         char buf[CONFIG_SYS_PBSIZE];
 193
 194         va_start(args, fmt);
 195         vsprintf(buf, fmt, args);
 196         va_end(args);
 197
 198         lcd_puts(buf);
 199 }
 200
 201 static int do_lcd_setcursor(cmd_tbl_t *cmdtp, int flag, int argc,
 202                             char *const argv[])
 203 {
 204         unsigned int col, row;
 205
 206         if (argc != 3)
 207                 return CMD_RET_USAGE;
 208
 209         col = simple_strtoul(argv[1], NULL, 10);
 210         row = simple_strtoul(argv[2], NULL, 10);
 211         lcd_position_cursor(col, row);
 212
 213         return 0;
 214 }
 215
 216 static int do_lcd_puts(cmd_tbl_t *cmdtp, int flag, int argc,
 217                        char *const argv[])
 218 {
 219         if (argc != 2)
 220                 return CMD_RET_USAGE;
 221
 222         lcd_puts(argv[1]);
 223
 224         return 0;
 225 }
 226
 227 U_BOOT_CMD(
 228         setcurs, 3,     1,      do_lcd_setcursor,
 229         "set cursor position within screen",
 230         "    <col> <row> in character"
 231 );
 232
 233 U_BOOT_CMD(
 234         lcdputs, 2,     1,      do_lcd_puts,
 235         "print string on lcd-framebuffer",
 236         "    <string>"
 237 );
 238