arch/mips/include/asm/txx9/dmac.h

   1 /*
   2  * TXx9 SoC DMA Controller
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef __ASM_TXX9_DMAC_H
  10 #define __ASM_TXX9_DMAC_H
  11
  12 #include <linux/dmaengine.h>
  13
  14 #define TXX9_DMA_MAX_NR_CHANNELS        4
  15
  16 /**
  17  * struct txx9dmac_platform_data - Controller configuration parameters
  18  * @memcpy_chan: Channel used for DMA_MEMCPY
  19  * @have_64bit_regs: DMAC have 64 bit registers
  20  */
  21 struct txx9dmac_platform_data {
  22         int     memcpy_chan;
  23         bool    have_64bit_regs;
  24 };
  25
  26 /**
  27  * struct txx9dmac_chan_platform_data - Channel configuration parameters
  28  * @dmac_dev: A platform device for DMAC
  29  */
  30 struct txx9dmac_chan_platform_data {
  31         struct platform_device *dmac_dev;
  32 };
  33
  34 /**
  35  * struct txx9dmac_slave - Controller-specific information about a slave
  36  * @tx_reg: physical address of data register used for
  37  *      memory-to-peripheral transfers
  38  * @rx_reg: physical address of data register used for
  39  *      peripheral-to-memory transfers
  40  * @reg_width: peripheral register width
  41  */
  42 struct txx9dmac_slave {
  43         u64             tx_reg;
  44         u64             rx_reg;
  45         unsigned int    reg_width;
  46 };
  47
  48 void txx9_dmac_init(int id, unsigned long baseaddr, int irq,
  49                     const struct txx9dmac_platform_data *pdata);
  50
  51 #endif /* __ASM_TXX9_DMAC_H */