| /* | |
| * This file is subject to the terms and conditions of the GNU General Public | |
| * License. See the file "COPYING" in the main directory of this archive | |
| * for more details. | |
| * | |
| * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org> | |
| * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> | |
| * | |
| */ | |
| #ifndef __ASM_MACH_ATH25_DMA_COHERENCE_H | |
| #define __ASM_MACH_ATH25_DMA_COHERENCE_H | |
| #include <linux/device.h> | |
| /* | |
| * We need some arbitrary non-zero value to be programmed to the BAR1 register | |
| * of PCI host controller to enable DMA. The same value should be used as the | |
| * offset to calculate the physical address of DMA buffer for PCI devices. | |
| */ | |
| #define AR2315_PCI_HOST_SDRAM_BASEADDR 0x20000000 | |
| static inline dma_addr_t ath25_dev_offset(struct device *dev) | |
| { | |
| #ifdef CONFIG_PCI | |
| extern struct bus_type pci_bus_type; | |
| if (dev && dev->bus == &pci_bus_type) | |
| return AR2315_PCI_HOST_SDRAM_BASEADDR; | |
| #endif | |
| return 0; | |
| } | |
| static inline dma_addr_t | |
| plat_map_dma_mem(struct device *dev, void *addr, size_t size) | |
| { | |
| return virt_to_phys(addr) + ath25_dev_offset(dev); | |
| } | |
| static inline dma_addr_t | |
| plat_map_dma_mem_page(struct device *dev, struct page *page) | |
| { | |
| return page_to_phys(page) + ath25_dev_offset(dev); | |
| } | |
| static inline unsigned long | |
| plat_dma_addr_to_phys(struct device *dev, dma_addr_t dma_addr) | |
| { | |
| return dma_addr - ath25_dev_offset(dev); | |
| } | |
| static inline void | |
| plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr, size_t size, | |
| enum dma_data_direction direction) | |
| { | |
| } | |
| static inline int plat_dma_supported(struct device *dev, u64 mask) | |
| { | |
| return 1; | |
| } | |
| static inline int plat_device_is_coherent(struct device *dev) | |
| { | |
| #ifdef CONFIG_DMA_COHERENT | |
| return 1; | |
| #endif | |
| #ifdef CONFIG_DMA_NONCOHERENT | |
| return 0; | |
| #endif | |
| } | |
| static inline void plat_post_dma_flush(struct device *dev) | |
| { | |
| } | |
| #endif /* __ASM_MACH_ATH25_DMA_COHERENCE_H */ |