drivers/dma/dw/internal.h

   1 /*
   2  * Driver for the Synopsys DesignWare DMA Controller
   3  *
   4  * Copyright (C) 2013 Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef _DW_DMAC_INTERNAL_H
  12 #define _DW_DMAC_INTERNAL_H
  13
  14 #include <linux/device.h>
  15 #include <linux/dw_dmac.h>
  16
  17 #include "regs.h"
  18
  19 /**
  20  * struct dw_dma_chip - representation of DesignWare DMA controller hardware
  21  * @dev:                struct device of the DMA controller
  22  * @irq:                irq line
  23  * @regs:               memory mapped I/O space
  24  * @dw:                 struct dw_dma that is filed by dw_dma_probe()
  25  */
  26 struct dw_dma_chip {
  27         struct device   *dev;
  28         int             irq;
  29         void __iomem    *regs;
  30         struct dw_dma   *dw;
  31 };
  32
  33 /* Export to the platform drivers */
  34 int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata);
  35 int dw_dma_remove(struct dw_dma_chip *chip);
  36
  37 void dw_dma_shutdown(struct dw_dma_chip *chip);
  38
  39 #ifdef CONFIG_PM_SLEEP
  40
  41 int dw_dma_suspend(struct dw_dma_chip *chip);
  42 int dw_dma_resume(struct dw_dma_chip *chip);
  43
  44 #endif /* CONFIG_PM_SLEEP */
  45
  46 /**
  47  * dwc_get_dms - get destination master
  48  * @slave:      pointer to the custom slave configuration
  49  *
  50  * Returns destination master in the custom slave configuration if defined, or
  51  * default value otherwise.
  52  */
  53 static inline unsigned int dwc_get_dms(struct dw_dma_slave *slave)
  54 {
  55         return slave ? slave->dst_master : 0;
  56 }
  57
  58 /**
  59  * dwc_get_sms - get source master
  60  * @slave:      pointer to the custom slave configuration
  61  *
  62  * Returns source master in the custom slave configuration if defined, or
  63  * default value otherwise.
  64  */
  65 static inline unsigned int dwc_get_sms(struct dw_dma_slave *slave)
  66 {
  67         return slave ? slave->src_master : 1;
  68 }
  69
  70 #endif /* _DW_DMAC_INTERNAL_H */