| /* |
| * Renesas SuperH DMA Engine support |
| * |
| * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> |
| * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved. |
| * |
| * This is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| */ |
| #ifndef __DMA_SHDMA_H |
| #define __DMA_SHDMA_H |
| |
| #include <linux/dmaengine.h> |
| #include <linux/interrupt.h> |
| #include <linux/list.h> |
| |
| #include <asm/dmaengine.h> |
| |
| #define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */ |
| |
| struct device; |
| |
| struct sh_dmae_chan { |
| dma_cookie_t completed_cookie; /* The maximum cookie completed */ |
| spinlock_t desc_lock; /* Descriptor operation lock */ |
| struct list_head ld_queue; /* Link descriptors queue */ |
| struct list_head ld_free; /* Link descriptors free */ |
| struct dma_chan common; /* DMA common channel */ |
| struct device *dev; /* Channel device */ |
| struct tasklet_struct tasklet; /* Tasklet */ |
| int descs_allocated; /* desc count */ |
| int xmit_shift; /* log_2(bytes_per_xfer) */ |
| int irq; |
| int id; /* Raw id of this channel */ |
| u32 __iomem *base; |
| char dev_id[16]; /* unique name per DMAC of channel */ |
| }; |
| |
| struct sh_dmae_device { |
| struct dma_device common; |
| struct sh_dmae_chan *chan[SH_DMAC_MAX_CHANNELS]; |
| struct sh_dmae_pdata *pdata; |
| u32 __iomem *chan_reg; |
| u16 __iomem *dmars; |
| }; |
| |
| #define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common) |
| #define to_sh_desc(lh) container_of(lh, struct sh_desc, node) |
| #define tx_to_sh_desc(tx) container_of(tx, struct sh_desc, async_tx) |
| |
| #endif /* __DMA_SHDMA_H */ |