Merge branch 'dev' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
[pandora-kernel.git] / arch / arm / plat-s5p / dev-mfc.c
1 /* linux/arch/arm/plat-s5p/dev-mfc.c
2  *
3  * Copyright (C) 2010-2011 Samsung Electronics Co.Ltd
4  *
5  * Base S5P MFC resource and device definitions
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11
12
13 #include <linux/kernel.h>
14 #include <linux/interrupt.h>
15 #include <linux/platform_device.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/memblock.h>
18 #include <linux/ioport.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);