dmac.h (1170B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * TXx9 SoC DMA Controller 4 */ 5 6#ifndef __ASM_TXX9_DMAC_H 7#define __ASM_TXX9_DMAC_H 8 9#include <linux/dmaengine.h> 10 11#define TXX9_DMA_MAX_NR_CHANNELS 4 12 13/** 14 * struct txx9dmac_platform_data - Controller configuration parameters 15 * @memcpy_chan: Channel used for DMA_MEMCPY 16 * @have_64bit_regs: DMAC have 64 bit registers 17 */ 18struct txx9dmac_platform_data { 19 int memcpy_chan; 20 bool have_64bit_regs; 21}; 22 23/** 24 * struct txx9dmac_chan_platform_data - Channel configuration parameters 25 * @dmac_dev: A platform device for DMAC 26 */ 27struct txx9dmac_chan_platform_data { 28 struct platform_device *dmac_dev; 29}; 30 31/** 32 * struct txx9dmac_slave - Controller-specific information about a slave 33 * @tx_reg: physical address of data register used for 34 * memory-to-peripheral transfers 35 * @rx_reg: physical address of data register used for 36 * peripheral-to-memory transfers 37 * @reg_width: peripheral register width 38 */ 39struct txx9dmac_slave { 40 u64 tx_reg; 41 u64 rx_reg; 42 unsigned int reg_width; 43}; 44 45void txx9_dmac_init(int id, unsigned long baseaddr, int irq, 46 const struct txx9dmac_platform_data *pdata); 47 48#endif /* __ASM_TXX9_DMAC_H */