arch/arm/plat-samsung/include/plat/dma-ops.h

   1 /* arch/arm/plat-samsung/include/plat/dma-ops.h
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * Samsung DMA support
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef __SAMSUNG_DMA_OPS_H_
  14 #define __SAMSUNG_DMA_OPS_H_ __FILE__
  15
  16 #include <linux/dmaengine.h>
  17
  18 struct samsung_dma_prep_info {
  19         enum dma_transaction_type cap;
  20         enum dma_data_direction direction;
  21         dma_addr_t buf;
  22         unsigned long period;
  23         unsigned long len;
  24         void (*fp)(void *data);
  25         void *fp_param;
  26 };
  27
  28 struct samsung_dma_info {
  29         enum dma_transaction_type cap;
  30         enum dma_data_direction direction;
  31         enum dma_slave_buswidth width;
  32         dma_addr_t fifo;
  33         struct s3c2410_dma_client *client;
  34 };
  35
  36 struct samsung_dma_ops {
  37         unsigned (*request)(enum dma_ch ch, struct samsung_dma_info *info);
  38         int (*release)(unsigned ch, struct s3c2410_dma_client *client);
  39         int (*prepare)(unsigned ch, struct samsung_dma_prep_info *info);
  40         int (*trigger)(unsigned ch);
  41         int (*started)(unsigned ch);
  42         int (*flush)(unsigned ch);
  43         int (*stop)(unsigned ch);
  44 };
  45
  46 extern void *samsung_dmadev_get_ops(void);
  47 extern void *s3c_dma_get_ops(void);
  48
  49 static inline void *__samsung_dma_get_ops(void)
  50 {
  51         if (samsung_dma_is_dmadev())
  52                 return samsung_dmadev_get_ops();
  53         else
  54                 return s3c_dma_get_ops();
  55 }
  56
  57 /*
  58  * samsung_dma_get_ops
  59  * get the set of samsung dma operations
  60  */
  61 #define samsung_dma_get_ops() __samsung_dma_get_ops()
  62
  63 #endif /* __SAMSUNG_DMA_OPS_H_ */