arch/arm/plat-omap/fb.c

   1 #include <linux/config.h>
   2 #include <linux/module.h>
   3 #include <linux/kernel.h>
   4 #include <linux/init.h>
   5 #include <linux/platform_device.h>
   6 #include <linux/bootmem.h>
   7
   8 #include <asm/hardware.h>
   9 #include <asm/io.h>
  10 #include <asm/mach-types.h>
  11 #include <asm/mach/map.h>
  12
  13 #include <asm/arch/board.h>
  14 #include <asm/arch/sram.h>
  15 #include <asm/arch/omapfb.h>
  16
  17 #if defined(CONFIG_FB_OMAP) || defined(CONFIG_FB_OMAP_MODULE)
  18
  19 static struct omapfb_platform_data omapfb_config;
  20
  21 static u64 omap_fb_dma_mask = ~(u32)0;
  22
  23 static struct platform_device omap_fb_device = {
  24         .name           = "omapfb",
  25         .id             = -1,
  26         .dev = {
  27                 .dma_mask               = &omap_fb_dma_mask,
  28                 .coherent_dma_mask      = ~(u32)0,
  29                 .platform_data          = &omapfb_config,
  30         },
  31         .num_resources = 0,
  32 };
  33
  34 /* called from map_io */
  35 void omapfb_reserve_mem(void)
  36 {
  37         const struct omap_fbmem_config *fbmem_conf;
  38
  39         omapfb_config.fbmem.fb_sram_start = omap_fb_sram_start;
  40         omapfb_config.fbmem.fb_sram_size = omap_fb_sram_size;
  41
  42         fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
  43
  44         if (fbmem_conf != NULL) {
  45                 /* indicate that the bootloader already initialized the
  46                  * fb device, so we'll skip that part in the fb driver
  47                  */
  48                 omapfb_config.fbmem.fb_sdram_start = fbmem_conf->fb_sdram_start;
  49                 omapfb_config.fbmem.fb_sdram_size = fbmem_conf->fb_sdram_size;
  50                 if (fbmem_conf->fb_sdram_size) {
  51                         pr_info("Reserving %u bytes SDRAM for frame buffer\n",
  52                                 fbmem_conf->fb_sdram_size);
  53                         reserve_bootmem(fbmem_conf->fb_sdram_start,
  54                                         fbmem_conf->fb_sdram_size);
  55                 }
  56         }
  57 }
  58
  59 static inline int omap_init_fb(void)
  60 {
  61         const struct omap_lcd_config *conf;
  62
  63         conf = omap_get_config(OMAP_TAG_LCD, struct omap_lcd_config);
  64         if (conf == NULL)
  65                 return 0;
  66
  67         omapfb_config.lcd = *conf;
  68
  69         return platform_device_register(&omap_fb_device);
  70 }
  71
  72 arch_initcall(omap_init_fb);
  73
  74 #else
  75
  76 void omapfb_reserve_mem(void) {}
  77
  78 #endif
  79
  80