| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * LPC32xx DMA Controller Interface |
| * |
| * Copyright (C) 2008 by NXP Semiconductors |
| * @Author: Kevin Wells |
| * @Descr: Definitions for LPC3250 chip |
| * @References: NXP LPC3250 User's Guide |
| */ |
| |
| #ifndef _LPC32XX_DMA_H |
| #define _LPC32XX_DMA_H |
| |
| /* |
| * DMA linked list structure used with a channel's LLI register; |
| * refer to UM10326, "LPC32x0 and LPC32x0/01 User manual" - Rev. 3 |
| * tables 84, 85, 86 & 87 for details. |
| */ |
| struct lpc32xx_dmac_ll { |
| u32 dma_src; |
| u32 dma_dest; |
| u32 next_lli; |
| u32 next_ctrl; |
| }; |
| |
| /* control register definitions */ |
| #define DMAC_CHAN_INT_TC_EN (1 << 31) /* channel terminal count interrupt */ |
| #define DMAC_CHAN_DEST_AUTOINC (1 << 27) /* automatic destination increment */ |
| #define DMAC_CHAN_SRC_AUTOINC (1 << 26) /* automatic source increment */ |
| #define DMAC_CHAN_DEST_AHB1 (1 << 25) /* AHB1 master for dest. transfer */ |
| #define DMAC_CHAN_DEST_WIDTH_32 (1 << 22) /* Destination data width selection */ |
| #define DMAC_CHAN_SRC_WIDTH_32 (1 << 19) /* Source data width selection */ |
| #define DMAC_CHAN_DEST_BURST_1 0 |
| #define DMAC_CHAN_DEST_BURST_4 (1 << 15) /* Destination data burst size */ |
| #define DMAC_CHAN_SRC_BURST_1 0 |
| #define DMAC_CHAN_SRC_BURST_4 (1 << 12) /* Source data burst size */ |
| |
| /* |
| * config_ch register definitions |
| * DMAC_CHAN_FLOW_D_xxx: flow control with DMA as the controller |
| * DMAC_DEST_PERIP: Macro for loading destination peripheral |
| * DMAC_SRC_PERIP: Macro for loading source peripheral |
| */ |
| #define DMAC_CHAN_FLOW_D_M2P (0x1 << 11) |
| #define DMAC_CHAN_FLOW_D_P2M (0x2 << 11) |
| #define DMAC_DEST_PERIP(n) (((n) & 0x1F) << 6) |
| #define DMAC_SRC_PERIP(n) (((n) & 0x1F) << 1) |
| |
| /* |
| * config_ch register definitions |
| * (source and destination peripheral ID numbers). |
| * These can be used with the DMAC_DEST_PERIP and DMAC_SRC_PERIP macros. |
| */ |
| #define DMA_PERID_NAND1 1 |
| |
| /* Channel enable bit */ |
| #define DMAC_CHAN_ENABLE (1 << 0) |
| |
| int lpc32xx_dma_get_channel(void); |
| int lpc32xx_dma_start_xfer(unsigned int channel, |
| const struct lpc32xx_dmac_ll *desc, u32 config); |
| int lpc32xx_dma_wait_status(unsigned int channel); |
| |
| #endif /* _LPC32XX_DMA_H */ |
