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 #include <mach/dma.h>
  18
  19 struct samsung_dma_prep_info {
  20         enum dma_transaction_type cap;
  21         enum dma_transfer_direction direction;
  22         dma_addr_t buf;
  23         unsigned long period;
  24         unsigned long len;
  25         void (*fp)(void *data);
  26         void *fp_param;
  27 };
  28
  29 struct samsung_dma_info {
  30         enum dma_transaction_type cap;
  31         enum dma_transfer_direction direction;
  32         enum dma_slave_buswidth width;
  33         dma_addr_t fifo;
  34         struct s3c2410_dma_client *client;
  35         struct property *dt_dmach_prop;
  36 };
  37
  38 struct samsung_dma_ops {
  39         unsigned (*request)(enum dma_ch ch, struct samsung_dma_info *info);
  40         int (*release)(unsigned ch, struct s3c2410_dma_client *client);
  41         int (*prepare)(unsigned ch, struct samsung_dma_prep_info *info);
  42         int (*trigger)(unsigned ch);
  43         int (*started)(unsigned ch);
  44         int (*flush)(unsigned ch);
  45         int (*stop)(unsigned ch);
  46 };
  47
  48 extern void *samsung_dmadev_get_ops(void);
  49 extern void *s3c_dma_get_ops(void);
  50
  51 static inline void *__samsung_dma_get_ops(void)
  52 {
  53         if (samsung_dma_is_dmadev())
  54                 return samsung_dmadev_get_ops();
  55         else
  56                 return s3c_dma_get_ops();
  57 }
  58
  59 /*
  60  * samsung_dma_get_ops
  61  * get the set of samsung dma operations
  62  */
  63 #define samsung_dma_get_ops() __samsung_dma_get_ops()
  64
  65 #endif /* __SAMSUNG_DMA_OPS_H_ */