drivers/dma/dw/internal.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Driver for the Synopsys DesignWare DMA Controller
   4  *
   5  * Copyright (C) 2013 Intel Corporation
   6  */
   7
   8 #ifndef _DMA_DW_INTERNAL_H
   9 #define _DMA_DW_INTERNAL_H
  10
  11 #include <linux/dma/dw.h>
  12
  13 #include "regs.h"
  14
  15 int do_dma_probe(struct dw_dma_chip *chip);
  16 int do_dma_remove(struct dw_dma_chip *chip);
  17
  18 void do_dw_dma_on(struct dw_dma *dw);
  19 void do_dw_dma_off(struct dw_dma *dw);
  20
  21 int do_dw_dma_disable(struct dw_dma_chip *chip);
  22 int do_dw_dma_enable(struct dw_dma_chip *chip);
  23
  24 extern bool dw_dma_filter(struct dma_chan *chan, void *param);
  25
  26 #ifdef CONFIG_ACPI
  27 void dw_dma_acpi_controller_register(struct dw_dma *dw);
  28 void dw_dma_acpi_controller_free(struct dw_dma *dw);
  29 #else /* !CONFIG_ACPI */
  30 static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {}
  31 static inline void dw_dma_acpi_controller_free(struct dw_dma *dw) {}
  32 #endif /* !CONFIG_ACPI */
  33
  34 struct platform_device;
  35
  36 #ifdef CONFIG_OF
  37 struct dw_dma_platform_data *dw_dma_parse_dt(struct platform_device *pdev);
  38 void dw_dma_of_controller_register(struct dw_dma *dw);
  39 void dw_dma_of_controller_free(struct dw_dma *dw);
  40 #else
  41 static inline struct dw_dma_platform_data *dw_dma_parse_dt(struct platform_device *pdev)
  42 {
  43         return NULL;
  44 }
  45 static inline void dw_dma_of_controller_register(struct dw_dma *dw) {}
  46 static inline void dw_dma_of_controller_free(struct dw_dma *dw) {}
  47 #endif
  48
  49 struct dw_dma_chip_pdata {
  50         const struct dw_dma_platform_data *pdata;
  51         int (*probe)(struct dw_dma_chip *chip);
  52         int (*remove)(struct dw_dma_chip *chip);
  53         struct dw_dma_chip *chip;
  54 };
  55
  56 static __maybe_unused const struct dw_dma_chip_pdata dw_dma_chip_pdata = {
  57         .probe = dw_dma_probe,
  58         .remove = dw_dma_remove,
  59 };
  60
  61 static const struct dw_dma_platform_data idma32_pdata = {
  62         .nr_channels = 8,
  63         .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
  64         .chan_priority = CHAN_PRIORITY_ASCENDING,
  65         .block_size = 131071,
  66         .nr_masters = 1,
  67         .data_width = {4},
  68         .multi_block = {1, 1, 1, 1, 1, 1, 1, 1},
  69 };
  70
  71 static __maybe_unused const struct dw_dma_chip_pdata idma32_chip_pdata = {
  72         .pdata = &idma32_pdata,
  73         .probe = idma32_dma_probe,
  74         .remove = idma32_dma_remove,
  75 };
  76
  77 #endif /* _DMA_DW_INTERNAL_H */