arch/arm/plat-omap/fb.c

   1 #include <linux/module.h>
   2 #include <linux/kernel.h>
   3 #include <linux/init.h>
   4 #include <linux/platform_device.h>
   5 #include <linux/bootmem.h>
   6
   7 #include <asm/hardware.h>
   8 #include <asm/io.h>
   9 #include <asm/mach-types.h>
  10 #include <asm/mach/map.h>
  11
  12 #include <asm/arch/board.h>
  13 #include <asm/arch/sram.h>
  14 #include <asm/arch/omapfb.h>
  15
  16 #if defined(CONFIG_FB_OMAP) || defined(CONFIG_FB_OMAP_MODULE)
  17
  18 static struct omapfb_platform_data omapfb_config;
  19
  20 static u64 omap_fb_dma_mask = ~(u32)0;
  21
  22 static struct platform_device omap_fb_device = {
  23         .name           = "omapfb",
  24         .id             = -1,
  25         .dev = {
  26                 .dma_mask               = &omap_fb_dma_mask,
  27                 .coherent_dma_mask      = ~(u32)0,
  28                 .platform_data          = &omapfb_config,
  29         },
  30         .num_resources = 0,
  31 };
  32
  33 /* called from map_io */
  34 void omapfb_reserve_mem(void)
  35 {
  36         const struct omap_fbmem_config *fbmem_conf;
  37
  38         omapfb_config.fbmem.fb_sram_start = omap_fb_sram_start;
  39         omapfb_config.fbmem.fb_sram_size = omap_fb_sram_size;
  40
  41         fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
  42
  43         if (fbmem_conf != NULL) {
  44                 /* indicate that the bootloader already initialized the
  45                  * fb device, so we'll skip that part in the fb driver
  46                  */
  47                 omapfb_config.fbmem.fb_sdram_start = fbmem_conf->fb_sdram_start;
  48                 omapfb_config.fbmem.fb_sdram_size = fbmem_conf->fb_sdram_size;
  49                 if (fbmem_conf->fb_sdram_size) {
  50                         pr_info("Reserving %u bytes SDRAM for frame buffer\n",
  51                                 fbmem_conf->fb_sdram_size);
  52                         reserve_bootmem(fbmem_conf->fb_sdram_start,
  53                                         fbmem_conf->fb_sdram_size);
  54                 }
  55         }
  56 }
  57
  58 static inline int omap_init_fb(void)
  59 {
  60         const struct omap_lcd_config *conf;
  61
  62         conf = omap_get_config(OMAP_TAG_LCD, struct omap_lcd_config);
  63         if (conf == NULL)
  64                 return 0;
  65
  66         omapfb_config.lcd = *conf;
  67
  68         return platform_device_register(&omap_fb_device);
  69 }
  70
  71 arch_initcall(omap_init_fb);
  72
  73 #else
  74
  75 void omapfb_reserve_mem(void) {}
  76
  77 #endif
  78
  79