LXR linux/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 <plat/mfc.h>
  21
  22#ifdef CONFIG_SAMSUNG_ATAGS
  23#include <mach/map.h>
  24#include <mach/irqs.h>
  25#include <plat/devs.h>
  26
  27static struct resource s5p_mfc_resource[] = {
  28        [0] = DEFINE_RES_MEM(S5P_PA_MFC, SZ_64K),
  29        [1] = DEFINE_RES_IRQ(IRQ_MFC),
  30};
  31
  32struct platform_device s5p_device_mfc = {
  33        .name           = "s5p-mfc",
  34        .id             = -1,
  35        .num_resources  = ARRAY_SIZE(s5p_mfc_resource),
  36        .resource       = s5p_mfc_resource,
  37};
  38
  39/*
  40 * MFC hardware has 2 memory interfaces which are modelled as two separate
  41 * platform devices to let dma-mapping distinguish between them.
  42 *
  43 * MFC parent device (s5p_device_mfc) must be registered before memory
  44 * interface specific devices (s5p_device_mfc_l and s5p_device_mfc_r).
  45 */
  46
  47struct platform_device s5p_device_mfc_l = {
  48        .name           = "s5p-mfc-l",
  49        .id             = -1,
  50        .dev            = {
  51                .parent                 = &s5p_device_mfc.dev,
  52                .dma_mask               = &s5p_device_mfc_l.dev.coherent_dma_mask,
  53                .coherent_dma_mask      = DMA_BIT_MASK(32),
  54        },
  55};
  56
  57struct platform_device s5p_device_mfc_r = {
  58        .name           = "s5p-mfc-r",
  59        .id             = -1,
  60        .dev            = {
  61                .parent                 = &s5p_device_mfc.dev,
  62                .dma_mask               = &s5p_device_mfc_r.dev.coherent_dma_mask,
  63                .coherent_dma_mask      = DMA_BIT_MASK(32),
  64        },
  65};
  66#else
  67static struct platform_device s5p_device_mfc_l;
  68static struct platform_device s5p_device_mfc_r;
  69#endif
  70
  71struct s5p_mfc_reserved_mem {
  72        phys_addr_t     base;
  73        unsigned long   size;
  74        struct device   *dev;
  75};
  76
  77static struct s5p_mfc_reserved_mem s5p_mfc_mem[2] __initdata;
  78
  79
  80void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize,
  81                                phys_addr_t lbase, unsigned int lsize)
  82{
  83        int i;
  84
  85        s5p_mfc_mem[0].dev = &s5p_device_mfc_r.dev;
  86        s5p_mfc_mem[0].base = rbase;
  87        s5p_mfc_mem[0].size = rsize;
  88
  89        s5p_mfc_mem[1].dev = &s5p_device_mfc_l.dev;
  90        s5p_mfc_mem[1].base = lbase;
  91        s5p_mfc_mem[1].size = lsize;
  92
  93        for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
  94                struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
  95                if (memblock_remove(area->base, area->size)) {
  96                        printk(KERN_ERR "Failed to reserve memory for MFC device (%ld bytes at 0x%08lx)\n",
  97                               area->size, (unsigned long) area->base);
  98                        area->base = 0;
  99                }
 100        }
 101}
 102
 103#ifdef CONFIG_SAMSUNG_ATAGS
 104static int __init s5p_mfc_memory_init(void)
 105{
 106        int i;
 107
 108        for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
 109                struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
 110                if (!area->base)
 111                        continue;
 112
 113                if (dma_declare_coherent_memory(area->dev, area->base,
 114                                area->base, area->size,
 115                                DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0)
 116                        printk(KERN_ERR "Failed to declare coherent memory for MFC device (%ld bytes at 0x%08lx)\n",
 117                               area->size, (unsigned long) area->base);
 118        }
 119        return 0;
 120}
 121device_initcall(s5p_mfc_memory_init);
 122#endif
 123
 124#ifdef CONFIG_OF
 125int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname,
 126                                int depth, void *data)
 127{
 128        __be32 *prop;
 129        unsigned long len;
 130        struct s5p_mfc_dt_meminfo *mfc_mem = data;
 131
 132        if (!data)
 133                return 0;
 134
 135        if (!of_flat_dt_is_compatible(node, mfc_mem->compatible))
 136                return 0;
 137
 138        prop = of_get_flat_dt_prop(node, "samsung,mfc-l", &len);
 139        if (!prop || (len != 2 * sizeof(unsigned long)))
 140                return 0;
 141
 142        mfc_mem->loff = be32_to_cpu(prop[0]);
 143        mfc_mem->lsize = be32_to_cpu(prop[1]);
 144
 145        prop = of_get_flat_dt_prop(node, "samsung,mfc-r", &len);
 146        if (!prop || (len != 2 * sizeof(unsigned long)))
 147                return 0;
 148
 149        mfc_mem->roff = be32_to_cpu(prop[0]);
 150        mfc_mem->rsize = be32_to_cpu(prop[1]);
 151
 152        return 1;
 153}
 154#endif
 155