| /* |
| * Driver for the Synopsys DesignWare DMA Controller (aka DMACA on |
| * AVR32 systems.) |
| * |
| * Copyright (C) 2007 Atmel Corporation |
| * |
| * 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. |
| */ |
| #ifndef DW_DMAC_H |
| #define DW_DMAC_H |
| |
| #include <linux/dmaengine.h> |
| |
| /** |
| * struct dw_dma_platform_data - Controller configuration parameters |
| * @nr_channels: Number of channels supported by hardware (max 8) |
| */ |
| struct dw_dma_platform_data { |
| unsigned int nr_channels; |
| }; |
| |
| /** |
| * struct dw_dma_slave - Controller-specific information about a slave |
| * @slave: Generic information about the slave |
| * @ctl_lo: Platform-specific initializer for the CTL_LO register |
| * @cfg_hi: Platform-specific initializer for the CFG_HI register |
| * @cfg_lo: Platform-specific initializer for the CFG_LO register |
| */ |
| struct dw_dma_slave { |
| struct dma_slave slave; |
| u32 cfg_hi; |
| u32 cfg_lo; |
| }; |
| |
| /* Platform-configurable bits in CFG_HI */ |
| #define DWC_CFGH_FCMODE (1 << 0) |
| #define DWC_CFGH_FIFO_MODE (1 << 1) |
| #define DWC_CFGH_PROTCTL(x) ((x) << 2) |
| #define DWC_CFGH_SRC_PER(x) ((x) << 7) |
| #define DWC_CFGH_DST_PER(x) ((x) << 11) |
| |
| /* Platform-configurable bits in CFG_LO */ |
| #define DWC_CFGL_PRIO(x) ((x) << 5) /* priority */ |
| #define DWC_CFGL_LOCK_CH_XFER (0 << 12) /* scope of LOCK_CH */ |
| #define DWC_CFGL_LOCK_CH_BLOCK (1 << 12) |
| #define DWC_CFGL_LOCK_CH_XACT (2 << 12) |
| #define DWC_CFGL_LOCK_BUS_XFER (0 << 14) /* scope of LOCK_BUS */ |
| #define DWC_CFGL_LOCK_BUS_BLOCK (1 << 14) |
| #define DWC_CFGL_LOCK_BUS_XACT (2 << 14) |
| #define DWC_CFGL_LOCK_CH (1 << 15) /* channel lockout */ |
| #define DWC_CFGL_LOCK_BUS (1 << 16) /* busmaster lockout */ |
| #define DWC_CFGL_HS_DST_POL (1 << 18) /* dst handshake active low */ |
| #define DWC_CFGL_HS_SRC_POL (1 << 19) /* src handshake active low */ |
| |
| static inline struct dw_dma_slave *to_dw_dma_slave(struct dma_slave *slave) |
| { |
| return container_of(slave, struct dw_dma_slave, slave); |
| } |
| |
| #endif /* DW_DMAC_H */ |