payloads/libpayload/drivers/video/video.c

   1 /*
   2  *
   3  * Copyright (C) 2008 Advanced Micro Devices, Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <libpayload-config.h>
  30 #include <libpayload.h>
  31 #include <video_console.h>
  32
  33 #if CONFIG(LP_GEODELX_VIDEO_CONSOLE)
  34 extern struct video_console geodelx_video_console;
  35 #endif
  36
  37 #if CONFIG(LP_COREBOOT_VIDEO_CONSOLE)
  38 extern struct video_console coreboot_video_console;
  39 #endif
  40
  41 #if CONFIG(LP_VGA_VIDEO_CONSOLE)
  42 extern struct video_console vga_video_console;
  43 #endif
  44
  45 static struct video_console *console_list[] =
  46 {
  47 #if CONFIG(LP_GEODELX_VIDEO_CONSOLE)
  48         &geodelx_video_console,
  49 #endif
  50 #if CONFIG(LP_COREBOOT_VIDEO_CONSOLE)
  51         &coreboot_video_console,
  52 #endif
  53 #if CONFIG(LP_VGA_VIDEO_CONSOLE)
  54         &vga_video_console,
  55 #endif
  56 };
  57
  58 static struct video_console *console;
  59
  60 static int cursorx;
  61 static int cursory;
  62
  63 void video_get_rows_cols(unsigned int *rows, unsigned int *cols)
  64 {
  65         if (console) {
  66                 *cols = console->columns;
  67                 *rows = console->rows;
  68         } else {
  69                 *cols = *rows = 0;
  70         }
  71 }
  72
  73 static void video_console_fixup_cursor(void)
  74 {
  75         if (!console)
  76                 return;
  77
  78         if (cursorx < 0)
  79                 cursorx = 0;
  80
  81         if (cursory < 0)
  82                 cursory = 0;
  83
  84         if (cursorx >= console->columns) {
  85                 cursorx = 0;
  86                 cursory++;
  87         }
  88
  89         if (console->rows <= 0)
  90                 return;
  91
  92         while(cursory >= console->rows) {
  93                 console->scroll_up();
  94                 cursory--;
  95         }
  96
  97         if (console->set_cursor)
  98                 console->set_cursor(cursorx, cursory);
  99 }
 100
 101 void video_console_cursor_enable(int state)
 102 {
 103         if (console && console->enable_cursor)
 104                 console->enable_cursor(state);
 105 }
 106
 107 void video_console_clear(void)
 108 {
 109         if (console)
 110                 console->clear();
 111
 112         cursorx = 0;
 113         cursory = 0;
 114
 115         if (console && console->set_cursor)
 116                 console->set_cursor(cursorx, cursory);
 117 }
 118
 119 void video_console_putc(u8 row, u8 col, unsigned int ch)
 120 {
 121         if (console)
 122                 console->putc(row, col, ch);
 123 }
 124
 125 void video_console_putchar(unsigned int ch)
 126 {
 127         if (!console)
 128                 return;
 129
 130         /* replace black-on-black with light-gray-on-black.
 131          * do it here, instead of in libc/console.c
 132          */
 133         if ((ch & 0xFF00) == 0) {
 134                 ch |= 0x0700;
 135         }
 136
 137         switch(ch & 0xFF) {
 138         case '\r':
 139                 cursorx = 0;
 140                 break;
 141
 142         case '\n':
 143                 cursorx = 0;
 144                 cursory++;
 145                 break;
 146
 147         case '\b':
 148                 cursorx--;
 149                 if (cursorx < 0) {
 150                         cursory--;
 151                         cursorx = console->columns;
 152                 }
 153                 break;
 154
 155         case '\t':
 156                 while(cursorx % 8 && cursorx < console->columns)
 157                         console->putc(cursory, cursorx++, (ch & 0xFF00) | ' ');
 158                 break;
 159         default:
 160                 console->putc(cursory, cursorx++, ch);
 161                 break;
 162         }
 163
 164         video_console_fixup_cursor();
 165 }
 166
 167 void video_printf(int foreground, int background, enum video_printf_align align,
 168                   const char *fmt, ...)
 169 {
 170         int i = 0, len;
 171         char str[200];
 172
 173         va_list ap;
 174         va_start(ap, fmt);
 175         len = vsnprintf(str, ARRAY_SIZE(str), fmt, ap);
 176         va_end(ap);
 177         if (len <= 0)
 178                 return;
 179
 180         /* vsnprintf can return len larger than size. when it happens,
 181          * only size-1 characters have been actually written. */
 182         if (len >= ARRAY_SIZE(str))
 183                 len = ARRAY_SIZE(str) - 1;
 184
 185         if (len > console->columns) {
 186                 cursorx = 0;
 187         } else {
 188                 switch (align) {
 189                 case VIDEO_PRINTF_ALIGN_LEFT:
 190                         cursorx = 0;
 191                         break;
 192                 case VIDEO_PRINTF_ALIGN_CENTER:
 193                         cursorx = (console->columns - len) / 2;
 194                         break;
 195                 case VIDEO_PRINTF_ALIGN_RIGHT:
 196                         cursorx = console->columns - len;
 197                         break;
 198                 default:
 199                         break;
 200                 }
 201         }
 202
 203         foreground &= 0xf;
 204         foreground <<= 8;
 205         background &= 0xf;
 206         background <<= 12;
 207
 208         while (str[i])
 209                 video_console_putchar(str[i++] | foreground | background);
 210 }
 211
 212 void video_console_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
 213 {
 214         *x=0;
 215         *y=0;
 216         *en=0;
 217
 218         if (console && console->get_cursor)
 219                 console->get_cursor(x, y, en);
 220
 221         *x = cursorx;
 222         *y = cursory;
 223 }
 224
 225 void video_console_set_cursor(unsigned int x, unsigned int y)
 226 {
 227         cursorx = x;
 228         cursory = y;
 229         video_console_fixup_cursor();
 230 }
 231
 232 static struct console_output_driver cons = {
 233         .putchar = video_console_putchar
 234 };
 235
 236 int video_init(void)
 237 {
 238         int i;
 239         unsigned int dummy_cursor_enabled;
 240
 241         for (i = 0; i < ARRAY_SIZE(console_list); i++) {
 242                 if (console_list[i]->init())
 243                         continue;
 244
 245                 console = console_list[i];
 246
 247                 if (console->get_cursor)
 248                         console->get_cursor((unsigned int*)&cursorx,
 249                                             (unsigned int*)&cursory,
 250                                             &dummy_cursor_enabled);
 251
 252                 if (cursorx) {
 253                         cursorx = 0;
 254                         cursory++;
 255                 }
 256
 257                 video_console_fixup_cursor();
 258                 return 0;
 259         }
 260         return 1;
 261 }
 262
 263 int video_console_init(void)
 264 {
 265         int ret = video_init();
 266         if (ret)
 267                 return ret;
 268         console_add_output_driver(&cons);
 269         return 0;
 270 }