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atmel-mci: convert to dma_request_channel and down-level dma_slave

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dma_request_channel provides an exclusive channel, so we no longer need to
pass slave data through dmaengine.

Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2009-01-06 11:38:16 -07:00
parent 33df8ca068
commit 74465b4ff9
7 changed files with 62 additions and 159 deletions
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38
include/linux/dmaengine.h
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@ -96,17 +96,6 @@ enum dma_transaction_type {
/* last transaction type for creation of the capabilities mask */
#define DMA_TX_TYPE_END (DMA_SLAVE + 1)
/**
* enum dma_slave_width - DMA slave register access width.
* @DMA_SLAVE_WIDTH_8BIT: Do 8-bit slave register accesses
* @DMA_SLAVE_WIDTH_16BIT: Do 16-bit slave register accesses
* @DMA_SLAVE_WIDTH_32BIT: Do 32-bit slave register accesses
*/
enum dma_slave_width {
DMA_SLAVE_WIDTH_8BIT,
DMA_SLAVE_WIDTH_16BIT,
DMA_SLAVE_WIDTH_32BIT,
};
/**
* enum dma_ctrl_flags - DMA flags to augment operation preparation,
@ -132,32 +121,6 @@ enum dma_ctrl_flags {
*/
typedef struct { DECLARE_BITMAP(bits, DMA_TX_TYPE_END); } dma_cap_mask_t;
/**
* struct dma_slave - Information about a DMA slave
* @dev: device acting as DMA slave
* @dma_dev: required DMA master device. If non-NULL, the client can not be
* bound to other masters than this.
* @tx_reg: physical address of data register used for
* memory-to-peripheral transfers
* @rx_reg: physical address of data register used for
* peripheral-to-memory transfers
* @reg_width: peripheral register width
*
* If dma_dev is non-NULL, the client can not be bound to other DMA
* masters than the one corresponding to this device. The DMA master
* driver may use this to determine if there is controller-specific
* data wrapped around this struct. Drivers of platform code that sets
* the dma_dev field must therefore make sure to use an appropriate
* controller-specific dma slave structure wrapping this struct.
*/
struct dma_slave {
struct device *dev;
struct device *dma_dev;
dma_addr_t tx_reg;
dma_addr_t rx_reg;
enum dma_slave_width reg_width;
};
/**
* struct dma_chan_percpu - the per-CPU part of struct dma_chan
* @refcount: local_t used for open-coded "bigref" counting
@ -248,7 +211,6 @@ typedef enum dma_state_client (*dma_filter_fn)(struct dma_chan *chan, void *filt
struct dma_client {
dma_event_callback event_callback;
dma_cap_mask_t cap_mask;
struct dma_slave *slave;
struct list_head global_node;
};