arch/arm/plat-omap/fb.c

   1 /*
   2  * File: arch/arm/plat-omap/fb.c
   3  *
   4  * Framebuffer device registration for TI OMAP platforms
   5  *
   6  * Copyright (C) 2006 Nokia Corporation
   7  * Author: Imre Deak <imre.deak@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/kernel.h>
  26 #include <linux/init.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/bootmem.h>
  29
  30 #include <asm/hardware.h>
  31 #include <asm/io.h>
  32 #include <asm/mach-types.h>
  33 #include <asm/mach/map.h>
  34
  35 #include <asm/arch/board.h>
  36 #include <asm/arch/sram.h>
  37 #include <asm/arch/omapfb.h>
  38
  39 #if defined(CONFIG_FB_OMAP) || defined(CONFIG_FB_OMAP_MODULE)
  40
  41 static struct omapfb_platform_data omapfb_config;
  42
  43 static u64 omap_fb_dma_mask = ~(u32)0;
  44
  45 static struct platform_device omap_fb_device = {
  46         .name           = "omapfb",
  47         .id             = -1,
  48         .dev = {
  49                 .dma_mask               = &omap_fb_dma_mask,
  50                 .coherent_dma_mask      = ~(u32)0,
  51                 .platform_data          = &omapfb_config,
  52         },
  53         .num_resources = 0,
  54 };
  55
  56 /* called from map_io */
  57 void omapfb_reserve_mem(void)
  58 {
  59         const struct omap_fbmem_config *fbmem_conf;
  60         unsigned long total_size;
  61         int i;
  62
  63         if (!omap_fb_sram_valid) {
  64                 /* FBMEM SRAM configuration was already found to be invalid.
  65                  * Ignore the whole configuration block. */
  66                 omapfb_config.mem_desc.region_cnt = 0;
  67                 return;
  68         }
  69
  70         i = 0;
  71         total_size = 0;
  72         while ((fbmem_conf = omap_get_nr_config(OMAP_TAG_FBMEM,
  73                                 struct omap_fbmem_config, i)) != NULL) {
  74                 unsigned long start;
  75                 unsigned long size;
  76
  77                 if (i == OMAPFB_PLANE_NUM) {
  78                         printk(KERN_ERR "ignoring extra plane info\n");
  79                         break;
  80                 }
  81                 start = fbmem_conf->start;
  82                 size  = fbmem_conf->size;
  83                 omapfb_config.mem_desc.region[i].paddr = start;
  84                 omapfb_config.mem_desc.region[i].size = size;
  85                 if (omap_fb_sram_plane != i && start) {
  86                         reserve_bootmem(start, size);
  87                         total_size += size;
  88                 }
  89                 i++;
  90         }
  91         omapfb_config.mem_desc.region_cnt = i;
  92         if (total_size)
  93                 pr_info("Reserving %lu bytes SDRAM for frame buffer\n",
  94                          total_size);
  95
  96 }
  97
  98 void omapfb_set_ctrl_platform_data(void *data)
  99 {
 100         omapfb_config.ctrl_platform_data = data;
 101 }
 102
 103 static inline int omap_init_fb(void)
 104 {
 105         const struct omap_lcd_config *conf;
 106
 107         conf = omap_get_config(OMAP_TAG_LCD, struct omap_lcd_config);
 108         if (conf == NULL)
 109                 return 0;
 110
 111         omapfb_config.lcd = *conf;
 112
 113         return platform_device_register(&omap_fb_device);
 114 }
 115
 116 arch_initcall(omap_init_fb);
 117
 118 #else
 119
 120 void omapfb_reserve_mem(void) {}
 121
 122 #endif
 123
 124