diff options
| author | Guennadi Liakhovetski | 2012-07-02 22:30:53 +0200 |
|---|---|---|
| committer | Vinod Koul | 2012-07-13 09:12:59 +0530 |
| commit | e95be94b8c25220aca09ed78c176f9b55a1482c8 (patch) | |
| tree | bd8f0e21a8171d95da6c389289233af71736022c /drivers/dma/sh/shdma.h | |
| parent | cd9092c6eabe898ff5aeb1c14c2509ea9d1f0080 (diff) | |
dma: move shdma driver to an own directory
The shdma driver is going to be split into multiple files. To make this more
convenient move it to an own directory.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma/sh/shdma.h')
| -rw-r--r-- | drivers/dma/sh/shdma.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/dma/sh/shdma.h b/drivers/dma/sh/shdma.h new file mode 100644 index 000000000000..0b1d2c105f02 --- /dev/null +++ b/drivers/dma/sh/shdma.h @@ -0,0 +1,66 @@ +/* + * 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> + +#define SH_DMAC_MAX_CHANNELS 20 +#define SH_DMA_SLAVE_NUMBER 256 +#define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */ + +struct device; + +enum dmae_pm_state { + DMAE_PM_ESTABLISHED, + DMAE_PM_BUSY, + DMAE_PM_PENDING, +}; + +struct sh_dmae_chan { + 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 */ + int pm_error; + enum dmae_pm_state pm_state; +}; + +struct sh_dmae_device { + struct dma_device common; + struct sh_dmae_chan *chan[SH_DMAC_MAX_CHANNELS]; + struct sh_dmae_pdata *pdata; + struct list_head node; + u32 __iomem *chan_reg; + u16 __iomem *dmars; + unsigned int chcr_offset; + u32 chcr_ie_bit; +}; + +#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) +#define to_sh_dev(chan) container_of(chan->common.device,\ + struct sh_dmae_device, common) + +#endif /* __DMA_SHDMA_H */ |