arch/arm/plat-samsung/s5p-dev-mfc.c

   1 /*
   2  * Copyright (C) 2010-2011 Samsung Electronics Co.Ltd
   3  *
   4  * Base S5P MFC resource and device definitions
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/memblock.h>
  16 #include <linux/ioport.h>
  17
  18 #include <mach/map.h>
  19 #include <plat/devs.h>
  20 #include <plat/irqs.h>
  21 #include <plat/mfc.h>
  22
  23 struct s5p_mfc_reserved_mem {
  24         phys_addr_t     base;
  25         unsigned long   size;
  26         struct device   *dev;
  27 };
  28
  29 static struct s5p_mfc_reserved_mem s5p_mfc_mem[2] __initdata;
  30
  31 void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize,
  32                                 phys_addr_t lbase, unsigned int lsize)
  33 {
  34         int i;
  35
  36         s5p_mfc_mem[0].dev = &s5p_device_mfc_r.dev;
  37         s5p_mfc_mem[0].base = rbase;
  38         s5p_mfc_mem[0].size = rsize;
  39
  40         s5p_mfc_mem[1].dev = &s5p_device_mfc_l.dev;
  41         s5p_mfc_mem[1].base = lbase;
  42         s5p_mfc_mem[1].size = lsize;
  43
  44         for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
  45                 struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
  46                 if (memblock_remove(area->base, area->size)) {
  47                         printk(KERN_ERR "Failed to reserve memory for MFC device (%ld bytes at 0x%08lx)\n",
  48                                area->size, (unsigned long) area->base);
  49                         area->base = 0;
  50                 }
  51         }
  52 }
  53
  54 static int __init s5p_mfc_memory_init(void)
  55 {
  56         int i;
  57
  58         for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
  59                 struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
  60                 if (!area->base)
  61                         continue;
  62
  63                 if (dma_declare_coherent_memory(area->dev, area->base,
  64                                 area->base, area->size,
  65                                 DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0)
  66                         printk(KERN_ERR "Failed to declare coherent memory for MFC device (%ld bytes at 0x%08lx)\n",
  67                                area->size, (unsigned long) area->base);
  68         }
  69         return 0;
  70 }
  71 device_initcall(s5p_mfc_memory_init);