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[linux/fpc-iii.git] / arch / arm / plat-samsung / s5p-dev-mfc.c
bloba93fb6fb66062db6580ff327acadf3982a44de65
1 /*
2 * Copyright (C) 2010-2011 Samsung Electronics Co.Ltd
4 * Base S5P MFC resource and device definitions
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 */
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>
20 #include <mach/map.h>
21 #include <mach/irqs.h>
22 #include <plat/devs.h>
23 #include <plat/mfc.h>
25 static struct resource s5p_mfc_resource[] = {
26 [0] = DEFINE_RES_MEM(S5P_PA_MFC, SZ_64K),
27 [1] = DEFINE_RES_IRQ(IRQ_MFC),
30 struct platform_device s5p_device_mfc = {
31 .name = "s5p-mfc",
32 .id = -1,
33 .num_resources = ARRAY_SIZE(s5p_mfc_resource),
34 .resource = s5p_mfc_resource,
38 * MFC hardware has 2 memory interfaces which are modelled as two separate
39 * platform devices to let dma-mapping distinguish between them.
41 * MFC parent device (s5p_device_mfc) must be registered before memory
42 * interface specific devices (s5p_device_mfc_l and s5p_device_mfc_r).
45 struct platform_device s5p_device_mfc_l = {
46 .name = "s5p-mfc-l",
47 .id = -1,
48 .dev = {
49 .parent = &s5p_device_mfc.dev,
50 .dma_mask = &s5p_device_mfc_l.dev.coherent_dma_mask,
51 .coherent_dma_mask = DMA_BIT_MASK(32),
55 struct platform_device s5p_device_mfc_r = {
56 .name = "s5p-mfc-r",
57 .id = -1,
58 .dev = {
59 .parent = &s5p_device_mfc.dev,
60 .dma_mask = &s5p_device_mfc_r.dev.coherent_dma_mask,
61 .coherent_dma_mask = DMA_BIT_MASK(32),
65 struct s5p_mfc_reserved_mem {
66 phys_addr_t base;
67 unsigned long size;
68 struct device *dev;
71 static struct s5p_mfc_reserved_mem s5p_mfc_mem[2] __initdata;
73 void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize,
74 phys_addr_t lbase, unsigned int lsize)
76 int i;
78 s5p_mfc_mem[0].dev = &s5p_device_mfc_r.dev;
79 s5p_mfc_mem[0].base = rbase;
80 s5p_mfc_mem[0].size = rsize;
82 s5p_mfc_mem[1].dev = &s5p_device_mfc_l.dev;
83 s5p_mfc_mem[1].base = lbase;
84 s5p_mfc_mem[1].size = lsize;
86 for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
87 struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
88 if (memblock_remove(area->base, area->size)) {
89 printk(KERN_ERR "Failed to reserve memory for MFC device (%ld bytes at 0x%08lx)\n",
90 area->size, (unsigned long) area->base);
91 area->base = 0;
96 static int __init s5p_mfc_memory_init(void)
98 int i;
100 for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) {
101 struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i];
102 if (!area->base)
103 continue;
105 if (dma_declare_coherent_memory(area->dev, area->base,
106 area->base, area->size,
107 DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0)
108 printk(KERN_ERR "Failed to declare coherent memory for MFC device (%ld bytes at 0x%08lx)\n",
109 area->size, (unsigned long) area->base);
111 return 0;
113 device_initcall(s5p_mfc_memory_init);
115 #ifdef CONFIG_OF
116 int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname,
117 int depth, void *data)
119 __be32 *prop;
120 unsigned long len;
121 struct s5p_mfc_dt_meminfo *mfc_mem = data;
123 if (!data)
124 return 0;
126 if (!of_flat_dt_is_compatible(node, mfc_mem->compatible))
127 return 0;
129 prop = of_get_flat_dt_prop(node, "samsung,mfc-l", &len);
130 if (!prop || (len != 2 * sizeof(unsigned long)))
131 return 0;
133 mfc_mem->loff = be32_to_cpu(prop[0]);
134 mfc_mem->lsize = be32_to_cpu(prop[1]);
136 prop = of_get_flat_dt_prop(node, "samsung,mfc-r", &len);
137 if (!prop || (len != 2 * sizeof(unsigned long)))
138 return 0;
140 mfc_mem->roff = be32_to_cpu(prop[0]);
141 mfc_mem->rsize = be32_to_cpu(prop[1]);
143 return 1;
145 #endif