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author | Kamil Debski <k.debski@samsung.com> | 2011-07-21 16:42:30 +0900 |
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committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-07-21 17:29:00 +0900 |
commit | 0f75a96bc0c4611dea0c7207533f822315120054 (patch) | |
tree | 3a1a174f9dcde361112a38377df61a27fcb9542c /arch/arm/plat-s5p/dev-mfc.c | |
parent | 35ce909ee6dacb0cb74ad04fd04e869fd5f83a7f (diff) | |
download | linux-0f75a96bc0c4611dea0c7207533f822315120054.tar.gz linux-0f75a96bc0c4611dea0c7207533f822315120054.tar.bz2 linux-0f75a96bc0c4611dea0c7207533f822315120054.zip |
ARM: S5P: Add support for MFC device
Add support for MFC device to plat-s5p, mach-exynos4, mach-s5pv210:
- clock support
- memory mapping and reserving
- s5p_device_mfc platform device
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-s5p/dev-mfc.c')
-rw-r--r-- | arch/arm/plat-s5p/dev-mfc.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/arm/plat-s5p/dev-mfc.c b/arch/arm/plat-s5p/dev-mfc.c new file mode 100644 index 000000000000..94226a0010f7 --- /dev/null +++ b/arch/arm/plat-s5p/dev-mfc.c @@ -0,0 +1,123 @@ +/* linux/arch/arm/plat-s5p/dev-mfc.c + * + * Copyright (C) 2010-2011 Samsung Electronics Co.Ltd + * + * Base S5P MFC resource and device definitions + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + + +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/memblock.h> +#include <linux/ioport.h> + +#include <mach/map.h> +#include <plat/devs.h> +#include <plat/irqs.h> +#include <plat/mfc.h> + +static struct resource s5p_mfc_resource[] = { + [0] = { + .start = S5P_PA_MFC, + .end = S5P_PA_MFC + SZ_64K - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_MFC, + .end = IRQ_MFC, + .flags = IORESOURCE_IRQ, + } +}; + +struct platform_device s5p_device_mfc = { + .name = "s5p-mfc", + .id = -1, + .num_resources = ARRAY_SIZE(s5p_mfc_resource), + .resource = s5p_mfc_resource, +}; + +/* + * MFC hardware has 2 memory interfaces which are modelled as two separate + * platform devices to let dma-mapping distinguish between them. + * + * MFC parent device (s5p_device_mfc) must be registered before memory + * interface specific devices (s5p_device_mfc_l and s5p_device_mfc_r). + */ + +static u64 s5p_mfc_dma_mask = DMA_BIT_MASK(32); + +struct platform_device s5p_device_mfc_l = { + .name = "s5p-mfc-l", + .id = -1, + .dev = { + .parent = &s5p_device_mfc.dev, + .dma_mask = &s5p_mfc_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +struct platform_device s5p_device_mfc_r = { + .name = "s5p-mfc-r", + .id = -1, + .dev = { + .parent = &s5p_device_mfc.dev, + .dma_mask = &s5p_mfc_dma_mask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +struct s5p_mfc_reserved_mem { + phys_addr_t base; + unsigned long size; + struct device *dev; +}; + +static struct s5p_mfc_reserved_mem s5p_mfc_mem[2] __initdata; + +void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize, + phys_addr_t lbase, unsigned int lsize) +{ + int i; + + s5p_mfc_mem[0].dev = &s5p_device_mfc_r.dev; + s5p_mfc_mem[0].base = rbase; + s5p_mfc_mem[0].size = rsize; + + s5p_mfc_mem[1].dev = &s5p_device_mfc_l.dev; + s5p_mfc_mem[1].base = lbase; + s5p_mfc_mem[1].size = lsize; + + for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) { + struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i]; + if (memblock_remove(area->base, area->size)) { + printk(KERN_ERR "Failed to reserve memory for MFC device (%ld bytes at 0x%08lx)\n", + area->size, (unsigned long) area->base); + area->base = 0; + } + } +} + +static int __init s5p_mfc_memory_init(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(s5p_mfc_mem); i++) { + struct s5p_mfc_reserved_mem *area = &s5p_mfc_mem[i]; + if (!area->base) + continue; + + if (dma_declare_coherent_memory(area->dev, area->base, + area->base, area->size, + DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0) + printk(KERN_ERR "Failed to declare coherent memory for MFC device (%ld bytes at 0x%08lx)\n", + area->size, (unsigned long) area->base); + } + return 0; +} +device_initcall(s5p_mfc_memory_init); |