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61 lines
1.6 KiB
61 lines
1.6 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* Renesas SuperH DMA Engine support |
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* |
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* Copyright (C) 2009 Nobuhiro Iwamatsu <[email protected]> |
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* Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved. |
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* |
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*/ |
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#ifndef __DMA_SHDMA_H |
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#define __DMA_SHDMA_H |
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#include <linux/sh_dma.h> |
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#include <linux/shdma-base.h> |
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#include <linux/dmaengine.h> |
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#include <linux/interrupt.h> |
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#include <linux/list.h> |
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#define SH_DMAE_MAX_CHANNELS 20 |
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#define SH_DMAE_TCR_MAX 0x00FFFFFF /* 16MB */ |
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struct device; |
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struct sh_dmae_chan { |
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struct shdma_chan shdma_chan; |
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const struct sh_dmae_slave_config *config; /* Slave DMA configuration */ |
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int xmit_shift; /* log_2(bytes_per_xfer) */ |
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void __iomem *base; |
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char dev_id[16]; /* unique name per DMAC of channel */ |
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int pm_error; |
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dma_addr_t slave_addr; |
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}; |
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struct sh_dmae_device { |
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struct shdma_dev shdma_dev; |
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struct sh_dmae_chan *chan[SH_DMAE_MAX_CHANNELS]; |
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const struct sh_dmae_pdata *pdata; |
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struct list_head node; |
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void __iomem *chan_reg; |
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void __iomem *dmars; |
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unsigned int chcr_offset; |
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u32 chcr_ie_bit; |
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}; |
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struct sh_dmae_regs { |
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u32 sar; /* SAR / source address */ |
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u32 dar; /* DAR / destination address */ |
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u32 tcr; /* TCR / transfer count */ |
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}; |
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struct sh_dmae_desc { |
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struct sh_dmae_regs hw; |
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struct shdma_desc shdma_desc; |
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}; |
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#define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, shdma_chan) |
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#define to_sh_desc(lh) container_of(lh, struct sh_desc, node) |
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#define tx_to_sh_desc(tx) container_of(tx, struct sh_desc, async_tx) |
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#define to_sh_dev(chan) container_of(chan->shdma_chan.dma_chan.device,\ |
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struct sh_dmae_device, shdma_dev.dma_dev) |
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#endif /* __DMA_SHDMA_H */
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