52 строки
1.3 KiB
C
52 строки
1.3 KiB
C
/*
|
|
* TXx9 SoC DMA Controller
|
|
*
|
|
* 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 __ASM_TXX9_DMAC_H
|
|
#define __ASM_TXX9_DMAC_H
|
|
|
|
#include <linux/dmaengine.h>
|
|
|
|
#define TXX9_DMA_MAX_NR_CHANNELS 4
|
|
|
|
/**
|
|
* struct txx9dmac_platform_data - Controller configuration parameters
|
|
* @memcpy_chan: Channel used for DMA_MEMCPY
|
|
* @have_64bit_regs: DMAC have 64 bit registers
|
|
*/
|
|
struct txx9dmac_platform_data {
|
|
int memcpy_chan;
|
|
bool have_64bit_regs;
|
|
};
|
|
|
|
/**
|
|
* struct txx9dmac_chan_platform_data - Channel configuration parameters
|
|
* @dmac_dev: A platform device for DMAC
|
|
*/
|
|
struct txx9dmac_chan_platform_data {
|
|
struct platform_device *dmac_dev;
|
|
};
|
|
|
|
/**
|
|
* struct txx9dmac_slave - Controller-specific information about a slave
|
|
* @tx_reg: physical address of data register used for
|
|
* memory-to-peripheral transfers
|
|
* @rx_reg: physical address of data register used for
|
|
* peripheral-to-memory transfers
|
|
* @reg_width: peripheral register width
|
|
*/
|
|
struct txx9dmac_slave {
|
|
u64 tx_reg;
|
|
u64 rx_reg;
|
|
unsigned int reg_width;
|
|
};
|
|
|
|
void txx9_dmac_init(int id, unsigned long baseaddr, int irq,
|
|
const struct txx9dmac_platform_data *pdata);
|
|
|
|
#endif /* __ASM_TXX9_DMAC_H */
|