/* * 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 <linux/of_fdt.h> #include <linux/of.h> #include <mach/map.h> #include <mach/irqs.h> #include <plat/devs.h> #include <plat/mfc.h> static struct resource s5p_mfc_resource[] = { [0] = DEFINE_RES_MEM(S5P_PA_MFC, SZ_64K), [1] = DEFINE_RES_IRQ(IRQ_MFC), }; 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). */ struct platform_device s5p_device_mfc_l = { .name = "s5p-mfc-l", .id = -1, .dev = { .parent = &s5p_device_mfc.dev, .dma_mask = &s5p_device_mfc_l.dev.coherent_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_device_mfc_r.dev.coherent_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); #ifdef CONFIG_OF int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname, int depth, void *data) { __be32 *prop; unsigned long len; struct s5p_mfc_dt_meminfo *mfc_mem = data; if (!data) return 0; if (!of_flat_dt_is_compatible(node, mfc_mem->compatible)) return 0; prop = of_get_flat_dt_prop(node, "samsung,mfc-l", &len); if (!prop || (len != 2 * sizeof(unsigned long))) return 0; mfc_mem->loff = be32_to_cpu(prop[0]); mfc_mem->lsize = be32_to_cpu(prop[1]); prop = of_get_flat_dt_prop(node, "samsung,mfc-r", &len); if (!prop || (len != 2 * sizeof(unsigned long))) return 0; mfc_mem->roff = be32_to_cpu(prop[0]); mfc_mem->rsize = be32_to_cpu(prop[1]); return 1; } #endif