Edit File: dma-atmel.h
/* * Header file for the Atmel AHB DMA Controller driver * * Copyright (C) 2008 Atmel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #ifndef AT_HDMAC_H #define AT_HDMAC_H #include <linux/dmaengine.h> /** * struct at_dma_platform_data - Controller configuration parameters * @nr_channels: Number of channels supported by hardware (max 8) * @cap_mask: dma_capability flags supported by the platform */ struct at_dma_platform_data { unsigned int nr_channels; dma_cap_mask_t cap_mask; }; /** * struct at_dma_slave - Controller-specific information about a slave * @dma_dev: required DMA master device * @cfg: Platform-specific initializer for the CFG register */ struct at_dma_slave { struct device *dma_dev; u32 cfg; }; /* Platform-configurable bits in CFG */ #define ATC_SRC_PER(h) (0xFU & (h)) /* Channel src rq associated with periph handshaking ifc h */ #define ATC_DST_PER(h) ((0xFU & (h)) << 4) /* Channel dst rq associated with periph handshaking ifc h */ #define ATC_SRC_REP (0x1 << 8) /* Source Replay Mod */ #define ATC_SRC_H2SEL (0x1 << 9) /* Source Handshaking Mod */ #define ATC_SRC_H2SEL_SW (0x0 << 9) #define ATC_SRC_H2SEL_HW (0x1 << 9) #define ATC_DST_REP (0x1 << 12) /* Destination Replay Mod */ #define ATC_DST_H2SEL (0x1 << 13) /* Destination Handshaking Mod */ #define ATC_DST_H2SEL_SW (0x0 << 13) #define ATC_DST_H2SEL_HW (0x1 << 13) #define ATC_SOD (0x1 << 16) /* Stop On Done */ #define ATC_LOCK_IF (0x1 << 20) /* Interface Lock */ #define ATC_LOCK_B (0x1 << 21) /* AHB Bus Lock */ #define ATC_LOCK_IF_L (0x1 << 22) /* Master Interface Arbiter Lock */ #define ATC_LOCK_IF_L_CHUNK (0x0 << 22) #define ATC_LOCK_IF_L_BUFFER (0x1 << 22) #define ATC_AHB_PROT_MASK (0x7 << 24) /* AHB Protection */ #define ATC_FIFOCFG_MASK (0x3 << 28) /* FIFO Request Configuration */ #define ATC_FIFOCFG_LARGESTBURST (0x0 << 28) #define ATC_FIFOCFG_HALFFIFO (0x1 << 28) #define ATC_FIFOCFG_ENOUGHSPACE (0x2 << 28) #endif /* AT_HDMAC_H */