pxp_dma.h
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/*
* Copyright (C) 2010-2015 Freescale Semiconductor, Inc. All Rights Reserved.
*
* This program 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _PXP_DMA
#define _PXP_DMA
#include <uapi/linux/pxp_dma.h>
struct pxp_tx_desc {
struct dma_async_tx_descriptor txd;
struct list_head tx_list;
struct list_head list;
int len;
union {
struct pxp_layer_param s0_param;
struct pxp_layer_param out_param;
struct pxp_layer_param ol_param;
struct pxp_layer_param processing_param;
} layer_param;
struct pxp_proc_data proc_data;
u32 hist_status; /* Histogram output status */
struct pxp_tx_desc *next;
};
struct pxp_channel {
struct dma_chan dma_chan;
dma_cookie_t completed; /* last completed cookie */
enum pxp_channel_status status;
void *client; /* Only one client per channel */
unsigned int n_tx_desc;
struct pxp_tx_desc *desc; /* allocated tx-descriptors */
struct list_head active_list; /* active tx-descriptors */
struct list_head free_list; /* free tx-descriptors */
struct list_head queue; /* queued tx-descriptors */
struct list_head list; /* track queued channel number */
spinlock_t lock; /* protects sg[0,1], queue */
struct mutex chan_mutex; /* protects status, cookie, free_list */
int active_buffer;
unsigned int eof_irq;
char eof_name[16]; /* EOF IRQ name for request_irq() */
};
#define to_tx_desc(tx) container_of(tx, struct pxp_tx_desc, txd)
#define to_pxp_channel(d) container_of(d, struct pxp_channel, dma_chan)
void pxp_txd_ack(struct dma_async_tx_descriptor *txd,
struct pxp_channel *pxp_chan);
#ifdef CONFIG_MXC_PXP_CLIENT_DEVICE
int register_pxp_device(void);
void unregister_pxp_device(void);
#else
static int register_pxp_device(void) { return 0; }
static void unregister_pxp_device(void) {}
#endif
void pxp_fill(
u32 bpp,
u32 value,
u32 width,
u32 height,
u32 output_buffer,
u32 output_pitch);
void m4_process(void);
#endif