drivers/staging/media/atomisp/pci/atomisp2/css2400/css_2401_csi2p_system/host/isys_dma.c

   1 /*
   2  * Support for Intel Camera Imaging ISP subsystem.
   3  * Copyright (c) 2015, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #include "isys_dma.h"
  16 #include "assert_support.h"
  17
  18 #ifndef __INLINE_ISYS2401_DMA__
  19 /*
  20  * Include definitions for isys dma register access functions. isys_dma.h
  21  * includes declarations of these functions by including isys_dma_public.h.
  22  */
  23 #include "isys_dma_private.h"
  24 #endif
  25
  26 const isys2401_dma_channel N_ISYS2401_DMA_CHANNEL_PROCS[N_ISYS2401_DMA_ID] = {
  27         N_ISYS2401_DMA_CHANNEL
  28 };
  29
  30 void isys2401_dma_set_max_burst_size(
  31         const isys2401_dma_ID_t dma_id,
  32         uint32_t                max_burst_size)
  33 {
  34         assert(dma_id < N_ISYS2401_DMA_ID);
  35         assert((max_burst_size > 0x00) && (max_burst_size <= 0xFF));
  36
  37         isys2401_dma_reg_store(dma_id,
  38                 DMA_DEV_INFO_REG_IDX(_DMA_V2_DEV_INTERF_MAX_BURST_IDX, HIVE_DMA_BUS_DDR_CONN),
  39                 (max_burst_size - 1));
  40 }