2 * Driver for the Synopsys DesignWare DMA Controller (aka DMACA on
5 * Copyright (C) 2007 Atmel Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
14 #include <linux/dmaengine.h>
17 * struct dw_dma_platform_data - Controller configuration parameters
18 * @nr_channels: Number of channels supported by hardware (max 8)
20 struct dw_dma_platform_data {
21 unsigned int nr_channels;
25 * struct dw_dma_slave - Controller-specific information about a slave
26 * @slave: Generic information about the slave
27 * @ctl_lo: Platform-specific initializer for the CTL_LO register
28 * @cfg_hi: Platform-specific initializer for the CFG_HI register
29 * @cfg_lo: Platform-specific initializer for the CFG_LO register
32 struct dma_slave slave;
37 /* Platform-configurable bits in CFG_HI */
38 #define DWC_CFGH_FCMODE (1 << 0)
39 #define DWC_CFGH_FIFO_MODE (1 << 1)
40 #define DWC_CFGH_PROTCTL(x) ((x) << 2)
41 #define DWC_CFGH_SRC_PER(x) ((x) << 7)
42 #define DWC_CFGH_DST_PER(x) ((x) << 11)
44 /* Platform-configurable bits in CFG_LO */
45 #define DWC_CFGL_PRIO(x) ((x) << 5) /* priority */
46 #define DWC_CFGL_LOCK_CH_XFER (0 << 12) /* scope of LOCK_CH */
47 #define DWC_CFGL_LOCK_CH_BLOCK (1 << 12)
48 #define DWC_CFGL_LOCK_CH_XACT (2 << 12)
49 #define DWC_CFGL_LOCK_BUS_XFER (0 << 14) /* scope of LOCK_BUS */
50 #define DWC_CFGL_LOCK_BUS_BLOCK (1 << 14)
51 #define DWC_CFGL_LOCK_BUS_XACT (2 << 14)
52 #define DWC_CFGL_LOCK_CH (1 << 15) /* channel lockout */
53 #define DWC_CFGL_LOCK_BUS (1 << 16) /* busmaster lockout */
54 #define DWC_CFGL_HS_DST_POL (1 << 18) /* dst handshake active low */
55 #define DWC_CFGL_HS_SRC_POL (1 << 19) /* src handshake active low */
57 static inline struct dw_dma_slave *to_dw_dma_slave(struct dma_slave *slave)
59 return container_of(slave, struct dw_dma_slave, slave);
62 #endif /* DW_DMAC_H */