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08d62f58aa
It is really useful not only for debugging to have an IRQ line and DMA pool labeled with driver and its instance ID. Do this for DesignWare DMA driver. All current users of this IP would be enhanced later on. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
74 lines
2 KiB
C
74 lines
2 KiB
C
/*
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* Driver for the Synopsys DesignWare DMA Controller
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*
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* Copyright (C) 2007 Atmel Corporation
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* Copyright (C) 2010-2011 ST Microelectronics
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* Copyright (C) 2014 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _DMA_DW_H
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#define _DMA_DW_H
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/dmaengine.h>
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#include <linux/platform_data/dma-dw.h>
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struct dw_dma;
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/**
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* struct dw_dma_chip - representation of DesignWare DMA controller hardware
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* @dev: struct device of the DMA controller
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* @id: instance ID
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* @irq: irq line
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* @regs: memory mapped I/O space
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* @clk: hclk clock
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* @dw: struct dw_dma that is filed by dw_dma_probe()
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* @pdata: pointer to platform data
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*/
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struct dw_dma_chip {
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struct device *dev;
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int id;
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int irq;
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void __iomem *regs;
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struct clk *clk;
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struct dw_dma *dw;
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const struct dw_dma_platform_data *pdata;
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};
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/* Export to the platform drivers */
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#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
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int dw_dma_probe(struct dw_dma_chip *chip);
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int dw_dma_remove(struct dw_dma_chip *chip);
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#else
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static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
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static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
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#endif /* CONFIG_DW_DMAC_CORE */
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/* DMA API extensions */
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struct dw_desc;
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struct dw_cyclic_desc {
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struct dw_desc **desc;
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unsigned long periods;
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void (*period_callback)(void *param);
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void *period_callback_param;
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};
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struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
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dma_addr_t buf_addr, size_t buf_len, size_t period_len,
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enum dma_transfer_direction direction);
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void dw_dma_cyclic_free(struct dma_chan *chan);
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int dw_dma_cyclic_start(struct dma_chan *chan);
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void dw_dma_cyclic_stop(struct dma_chan *chan);
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dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan);
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dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan);
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#endif /* _DMA_DW_H */
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