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 /* in devices.c */
  24 extern void omap_nop_release(struct device *dev);
  25
  26 static struct platform_device omap_fb_device = {
  27         .name           = "omapfb",
  28         .id             = -1,
  29         .dev = {
  30                 .release                = omap_nop_release,
  31                 .dma_mask               = &omap_fb_dma_mask,
  32                 .coherent_dma_mask      = ~(u32)0,
  33                 .platform_data          = &omapfb_config,
  34         },
  35         .num_resources = 0,
  36 };
  37
  38 /* called from map_io */
  39 void omapfb_reserve_mem(void)
  40 {
  41         const struct omap_fbmem_config *fbmem_conf;
  42
  43         omapfb_config.fbmem.fb_sram_start = omap_fb_sram_start;
  44         omapfb_config.fbmem.fb_sram_size = omap_fb_sram_size;
  45
  46         fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
  47
  48         if (fbmem_conf != NULL) {
  49                 /* indicate that the bootloader already initialized the
  50                  * fb device, so we'll skip that part in the fb driver
  51                  */
  52                 omapfb_config.fbmem.fb_sdram_start = fbmem_conf->fb_sdram_start;
  53                 omapfb_config.fbmem.fb_sdram_size = fbmem_conf->fb_sdram_size;
  54                 if (fbmem_conf->fb_sdram_size) {
  55                         pr_info("Reserving %u bytes SDRAM for frame buffer\n",
  56                                 fbmem_conf->fb_sdram_size);
  57                         reserve_bootmem(fbmem_conf->fb_sdram_start,
  58                                         fbmem_conf->fb_sdram_size);
  59                 }
  60         }
  61 }
  62
  63 static inline int omap_init_fb(void)
  64 {
  65         const struct omap_lcd_config *conf;
  66
  67         conf = omap_get_config(OMAP_TAG_LCD, struct omap_lcd_config);
  68         if (conf == NULL)
  69                 return 0;
  70
  71         omapfb_config.lcd = *conf;
  72
  73         return platform_device_register(&omap_fb_device);
  74 }
  75
  76 arch_initcall(omap_init_fb);
  77
  78 #else
  79
  80 void omapfb_reserve_mem(void) {}
  81
  82 #endif
  83
  84