107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
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/*
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* Copyright (C) 2010 Samsung Electronics Co. Ltd.
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* Jaswinder Singh <jassi.brar@samsung.com>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __DMA_PL330_H_
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#define __DMA_PL330_H_ __FILE__
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#include <linux/dmaengine.h>
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/*
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* PL330 can assign any channel to communicate with
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* any of the peripherals attched to the DMAC.
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* For the sake of consistency across client drivers,
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* We keep the channel names unchanged and only add
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* missing peripherals are added.
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* Order is not important since DMA PL330 API driver
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* use these just as IDs.
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*/
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enum dma_ch {
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DMACH_MAX = 0,
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};
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struct s3c2410_dma_client {
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char *name;
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};
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static inline bool samsung_dma_has_circular(void)
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{
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return true;
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}
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static inline bool samsung_dma_is_dmadev(void)
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{
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return true;
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}
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static inline bool samsung_dma_has_infiniteloop(void)
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{
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return true;
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}
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struct samsung_dma_req {
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enum dma_transaction_type cap;
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struct s3c2410_dma_client *client;
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};
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struct samsung_dma_prep {
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enum dma_transaction_type cap;
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enum dma_transfer_direction direction;
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dma_addr_t buf;
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unsigned long period;
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unsigned long len;
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void (*fp)(void *data);
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void *fp_param;
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unsigned int infiniteloop;
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};
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struct samsung_dma_config {
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enum dma_transfer_direction direction;
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enum dma_slave_buswidth width;
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u32 maxburst;
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dma_addr_t fifo;
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};
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struct samsung_dma_ops {
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unsigned long(*request)(enum dma_ch ch, struct samsung_dma_req *param,
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struct device *dev, char *ch_name);
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int (*release)(unsigned long ch, void *param);
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int (*config)(unsigned long ch, struct samsung_dma_config *param);
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int (*prepare)(unsigned long ch, struct samsung_dma_prep *param, dma_cookie_t *cookie);
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int (*tx_status)(unsigned long ch, dma_cookie_t cookie, struct dma_tx_state *txstate);
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int (*trigger)(unsigned long ch);
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int (*started)(unsigned long ch);
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int (*getposition)(unsigned long ch, dma_addr_t *src, dma_addr_t *dst);
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int (*flush)(unsigned long ch);
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int (*stop)(unsigned long ch);
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int (*debug)(unsigned long ch);
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};
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/*
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* samsung_dma_get_ops
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* get the set of samsung dma operations
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*/
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#if defined(CONFIG_SAMSUNG_DMADEV) || defined(CONFIG_SAMSUNG_DMADEV_MODULE)
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extern void *samsung_dmadev_get_ops(void);
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extern void *s3c_dma_get_ops(void);
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static inline void *samsung_dma_get_ops(void)
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{
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if (samsung_dma_is_dmadev())
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return samsung_dmadev_get_ops();
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else
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return s3c_dma_get_ops();
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}
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#else
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#define samsung_dma_get_ops() NULL
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#endif
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#endif /* __DMA_PL330_H_ */
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