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_move_cursor(int x, int y)
 126 {
 127         cursorx += x;
 128         cursory += y;
 129         video_console_fixup_cursor();
 130 }
 131
 132 void video_console_putchar(unsigned int ch)
 133 {
 134         if (!console)
 135                 return;
 136
 137         /* replace black-on-black with light-gray-on-black.
 138          * do it here, instead of in libc/console.c
 139          */
 140         if ((ch & 0xFF00) == 0) {
 141                 ch |= 0x0700;
 142         }
 143
 144         switch(ch & 0xFF) {
 145         case '\r':
 146                 cursorx = 0;
 147                 break;
 148
 149         case '\n':
 150                 cursorx = 0;
 151                 cursory++;
 152                 break;
 153
 154         case '\b':
 155                 cursorx--;
 156                 if (cursorx < 0) {
 157                         cursory--;
 158                         cursorx = console->columns;
 159                 }
 160                 break;
 161
 162         case '\t':
 163                 while(cursorx % 8 && cursorx < console->columns)
 164                         console->putc(cursory, cursorx++, (ch & 0xFF00) | ' ');
 165                 break;
 166         default:
 167                 console->putc(cursory, cursorx++, ch);
 168                 break;
 169         }
 170
 171         video_console_fixup_cursor();
 172 }
 173
 174 void video_printf(int foreground, int background, enum video_printf_align align,
 175                   const char *fmt, ...)
 176 {
 177         int i = 0, len;
 178         char str[200];
 179
 180         va_list ap;
 181         va_start(ap, fmt);
 182         len = vsnprintf(str, ARRAY_SIZE(str), fmt, ap);
 183         va_end(ap);
 184         if (len <= 0)
 185                 return;
 186
 187         /* vsnprintf can return len larger than size. when it happens,
 188          * only size-1 characters have been actually written. */
 189         if (len >= ARRAY_SIZE(str))
 190                 len = ARRAY_SIZE(str) - 1;
 191
 192         if (len > console->columns) {
 193                 cursorx = 0;
 194         } else {
 195                 switch (align) {
 196                 case VIDEO_PRINTF_ALIGN_LEFT:
 197                         cursorx = 0;
 198                         break;
 199                 case VIDEO_PRINTF_ALIGN_CENTER:
 200                         cursorx = (console->columns - len) / 2;
 201                         break;
 202                 case VIDEO_PRINTF_ALIGN_RIGHT:
 203                         cursorx = console->columns - len;
 204                         break;
 205                 default:
 206                         break;
 207                 }
 208         }
 209
 210         foreground &= 0xf;
 211         foreground <<= 8;
 212         background &= 0xf;
 213         background <<= 12;
 214
 215         while (str[i])
 216                 video_console_putchar(str[i++] | foreground | background);
 217 }
 218
 219 void video_console_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
 220 {
 221         *x=0;
 222         *y=0;
 223         *en=0;
 224
 225         if (console && console->get_cursor)
 226                 console->get_cursor(x, y, en);
 227
 228         *x = cursorx;
 229         *y = cursory;
 230 }
 231
 232 void video_console_set_cursor(unsigned int x, unsigned int y)
 233 {
 234         cursorx = x;
 235         cursory = y;
 236         video_console_fixup_cursor();
 237 }
 238
 239 static struct console_output_driver cons = {
 240         .putchar = video_console_putchar
 241 };
 242
 243 int video_init(void)
 244 {
 245         int i;
 246         unsigned int dummy_cursor_enabled;
 247
 248         for (i = 0; i < ARRAY_SIZE(console_list); i++) {
 249                 if (console_list[i]->init())
 250                         continue;
 251
 252                 console = console_list[i];
 253
 254                 if (console->get_cursor)
 255                         console->get_cursor((unsigned int*)&cursorx,
 256                                             (unsigned int*)&cursory,
 257                                             &dummy_cursor_enabled);
 258
 259                 if (cursorx) {
 260                         cursorx = 0;
 261                         cursory++;
 262                 }
 263
 264                 video_console_fixup_cursor();
 265                 return 0;
 266         }
 267         return 1;
 268 }
 269
 270 int video_console_init(void)
 271 {
 272         int ret = video_init();
 273         if (ret)
 274                 return ret;
 275         console_add_output_driver(&cons);
 276         return 0;
 277 }