drivers/video/logo/logo.c

   1
   2 /*
   3  *  Linux logo to be displayed on boot
   4  *
   5  *  Copyright (C) 1996 Larry Ewing (lewing@isc.tamu.edu)
   6  *  Copyright (C) 1996,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   7  *  Copyright (C) 2001 Greg Banks <gnb@alphalink.com.au>
   8  *  Copyright (C) 2001 Jan-Benedict Glaw <jbglaw@lug-owl.de>
   9  *  Copyright (C) 2003 Geert Uytterhoeven <geert@linux-m68k.org>
  10  */
  11
  12 #include <linux/linux_logo.h>
  13 #include <linux/stddef.h>
  14 #include <linux/module.h>
  15
  16 #ifdef CONFIG_M68K
  17 #include <asm/setup.h>
  18 #endif
  19
  20 #ifdef CONFIG_MIPS
  21 #include <asm/bootinfo.h>
  22 #endif
  23
  24 static bool nologo;
  25 module_param(nologo, bool, 0);
  26 MODULE_PARM_DESC(nologo, "Disables startup logo");
  27
  28 /*
  29  * Logos are located in the initdata, and will be freed in kernel_init.
  30  * Use late_init to mark the logos as freed to prevent any further use.
  31  */
  32
  33 static bool logos_freed;
  34
  35 static int __init fb_logo_late_init(void)
  36 {
  37         logos_freed = true;
  38         return 0;
  39 }
  40
  41 late_initcall(fb_logo_late_init);
  42
  43 /* logo's are marked __initdata. Use __init_refok to tell
  44  * modpost that it is intended that this function uses data
  45  * marked __initdata.
  46  */
  47 const struct linux_logo * __init_refok fb_find_logo(int depth)
  48 {
  49         const struct linux_logo *logo = NULL;
  50
  51         if (nologo || logos_freed)
  52                 return NULL;
  53
  54         if (depth >= 1) {
  55 #ifdef CONFIG_LOGO_LINUX_MONO
  56                 /* Generic Linux logo */
  57                 logo = &logo_linux_mono;
  58 #endif
  59 #ifdef CONFIG_LOGO_SUPERH_MONO
  60                 /* SuperH Linux logo */
  61                 logo = &logo_superh_mono;
  62 #endif
  63         }
  64
  65         if (depth >= 4) {
  66 #ifdef CONFIG_LOGO_LINUX_VGA16
  67                 /* Generic Linux logo */
  68                 logo = &logo_linux_vga16;
  69 #endif
  70 #ifdef CONFIG_LOGO_BLACKFIN_VGA16
  71                 /* Blackfin processor logo */
  72                 logo = &logo_blackfin_vga16;
  73 #endif
  74 #ifdef CONFIG_LOGO_SUPERH_VGA16
  75                 /* SuperH Linux logo */
  76                 logo = &logo_superh_vga16;
  77 #endif
  78         }
  79
  80         if (depth >= 8) {
  81 #ifdef CONFIG_LOGO_LINUX_CLUT224
  82                 /* Generic Linux logo */
  83                 logo = &logo_linux_clut224;
  84 #endif
  85 #ifdef CONFIG_LOGO_BLACKFIN_CLUT224
  86                 /* Blackfin Linux logo */
  87                 logo = &logo_blackfin_clut224;
  88 #endif
  89 #ifdef CONFIG_LOGO_DEC_CLUT224
  90                 /* DEC Linux logo on MIPS/MIPS64 or ALPHA */
  91                 logo = &logo_dec_clut224;
  92 #endif
  93 #ifdef CONFIG_LOGO_MAC_CLUT224
  94                 /* Macintosh Linux logo on m68k */
  95                 if (MACH_IS_MAC)
  96                         logo = &logo_mac_clut224;
  97 #endif
  98 #ifdef CONFIG_LOGO_PARISC_CLUT224
  99                 /* PA-RISC Linux logo */
 100                 logo = &logo_parisc_clut224;
 101 #endif
 102 #ifdef CONFIG_LOGO_SGI_CLUT224
 103                 /* SGI Linux logo on MIPS/MIPS64 and VISWS */
 104                 logo = &logo_sgi_clut224;
 105 #endif
 106 #ifdef CONFIG_LOGO_SUN_CLUT224
 107                 /* Sun Linux logo */
 108                 logo = &logo_sun_clut224;
 109 #endif
 110 #ifdef CONFIG_LOGO_SUPERH_CLUT224
 111                 /* SuperH Linux logo */
 112                 logo = &logo_superh_clut224;
 113 #endif
 114 #ifdef CONFIG_LOGO_M32R_CLUT224
 115                 /* M32R Linux logo */
 116                 logo = &logo_m32r_clut224;
 117 #endif
 118         }
 119         return logo;
 120 }
 121 EXPORT_SYMBOL_GPL(fb_find_logo);