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 #include <linux/of_fdt.h>
  18 #include <linux/of.h>
  19
  20 #include <mach/map.h>
  21 #include <plat/devs.h>
  22 #include <plat/irqs.h>
  23 #include <plat/mfc.h>
  24
  25 struct s5p_mfc_reserved_mem {
  26         phys_addr_t     base;
  27         unsigned long   size;
  28         struct device   *dev;
  29 };
  30
  31 static struct s5p_mfc_reserved_mem s5p_mfc_mem[2] __initdata;
  32
  33 void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize,
  34                                 phys_addr_t lbase, unsigned int lsize)
  35 {
  36         int i;
  37
  38         s5p_mfc_mem[0].dev = &s5p_device_mfc_r.dev;
  39         s5p_mfc_mem[0].base = rbase;
  40         s5p_mfc_mem[0].size = rsize;
  41
  42         s5p_mfc_mem[1].dev = &s5p_device_mfc_l.dev;
  43         s5p_mfc_mem[1].base = lbase;
  44         s5p_mfc_mem[1].size = lsize;
  45
  46         for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
  47                 struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
  48                 if (memblock_remove(area->base, area->size)) {
  49                         printk(KERN_ERR "Failed to reserve memory for MFC device (%ld bytes at 0x%08lx)\n",
  50                                area->size, (unsigned long) area->base);
  51                         area->base = 0;
  52                 }
  53         }
  54 }
  55
  56 static int __init s5p_mfc_memory_init(void)
  57 {
  58         int i;
  59
  60         for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
  61                 struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
  62                 if (!area->base)
  63                         continue;
  64
  65                 if (dma_declare_coherent_memory(area->dev, area->base,
  66                                 area->base, area->size,
  67                                 DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0)
  68                         printk(KERN_ERR "Failed to declare coherent memory for MFC device (%ld bytes at 0x%08lx)\n",
  69                                area->size, (unsigned long) area->base);
  70         }
  71         return 0;
  72 }
  73 device_initcall(s5p_mfc_memory_init);
  74
  75 #ifdef CONFIG_OF
  76 int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname,
  77                                 int depth, void *data)
  78 {
  79         __be32 *prop;
  80         unsigned long len;
  81         struct s5p_mfc_dt_meminfo *mfc_mem = data;
  82
  83         if (!data)
  84                 return 0;
  85
  86         if (!of_flat_dt_is_compatible(node, mfc_mem->compatible))
  87                 return 0;
  88
  89         prop = of_get_flat_dt_prop(node, "samsung,mfc-l", &len);
  90         if (!prop || (len != 2 * sizeof(unsigned long)))
  91                 return 0;
  92
  93         mfc_mem->loff = be32_to_cpu(prop[0]);
  94         mfc_mem->lsize = be32_to_cpu(prop[1]);
  95
  96         prop = of_get_flat_dt_prop(node, "samsung,mfc-r", &len);
  97         if (!prop || (len != 2 * sizeof(unsigned long)))
  98                 return 0;
  99
 100         mfc_mem->roff = be32_to_cpu(prop[0]);
 101         mfc_mem->rsize = be32_to_cpu(prop[1]);
 102
 103         return 1;
 104 }
 105 #endif