205 lines
6.3 KiB
C
205 lines
6.3 KiB
C
/*
|
|
* File: include/asm-blackfin/simple_bf533_dma.h
|
|
* Based on: none - original work
|
|
* Author: LG Soft India
|
|
* Copyright (C) 2004-2005 Analog Devices Inc.
|
|
* Created: Tue Sep 21 2004
|
|
* Description: This file contains the major Data structures and constants
|
|
* used for DMA Implementation in BF533
|
|
* Modified:
|
|
*
|
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* 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, 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; see the file COPYING.
|
|
* If not, write to the Free Software Foundation,
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifndef _BLACKFIN_DMA_H_
|
|
#define _BLACKFIN_DMA_H_
|
|
|
|
#include <asm/io.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/signal.h>
|
|
|
|
#include <linux/kernel.h>
|
|
#include <mach/dma.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
#include <asm/blackfin.h>
|
|
|
|
#define MAX_DMA_ADDRESS PAGE_OFFSET
|
|
|
|
/*****************************************************************************
|
|
* Generic DMA Declarations
|
|
*
|
|
****************************************************************************/
|
|
enum dma_chan_status {
|
|
DMA_CHANNEL_FREE,
|
|
DMA_CHANNEL_REQUESTED,
|
|
DMA_CHANNEL_ENABLED,
|
|
};
|
|
|
|
/*-------------------------
|
|
* config reg bits value
|
|
*-------------------------*/
|
|
#define DATA_SIZE_8 0
|
|
#define DATA_SIZE_16 1
|
|
#define DATA_SIZE_32 2
|
|
|
|
#define DMA_FLOW_STOP 0
|
|
#define DMA_FLOW_AUTO 1
|
|
#define DMA_FLOW_ARRAY 4
|
|
#define DMA_FLOW_SMALL 6
|
|
#define DMA_FLOW_LARGE 7
|
|
|
|
#define DIMENSION_LINEAR 0
|
|
#define DIMENSION_2D 1
|
|
|
|
#define DIR_READ 0
|
|
#define DIR_WRITE 1
|
|
|
|
#define INTR_DISABLE 0
|
|
#define INTR_ON_BUF 2
|
|
#define INTR_ON_ROW 3
|
|
|
|
#define DMA_NOSYNC_KEEP_DMA_BUF 0
|
|
#define DMA_SYNC_RESTART 1
|
|
|
|
struct dmasg {
|
|
unsigned long next_desc_addr;
|
|
unsigned long start_addr;
|
|
unsigned short cfg;
|
|
unsigned short x_count;
|
|
short x_modify;
|
|
unsigned short y_count;
|
|
short y_modify;
|
|
} __attribute__((packed));
|
|
|
|
struct dma_register {
|
|
unsigned long next_desc_ptr; /* DMA Next Descriptor Pointer register */
|
|
unsigned long start_addr; /* DMA Start address register */
|
|
|
|
unsigned short cfg; /* DMA Configuration register */
|
|
unsigned short dummy1; /* DMA Configuration register */
|
|
|
|
unsigned long reserved;
|
|
|
|
unsigned short x_count; /* DMA x_count register */
|
|
unsigned short dummy2;
|
|
|
|
short x_modify; /* DMA x_modify register */
|
|
unsigned short dummy3;
|
|
|
|
unsigned short y_count; /* DMA y_count register */
|
|
unsigned short dummy4;
|
|
|
|
short y_modify; /* DMA y_modify register */
|
|
unsigned short dummy5;
|
|
|
|
unsigned long curr_desc_ptr; /* DMA Current Descriptor Pointer
|
|
register */
|
|
unsigned long curr_addr_ptr; /* DMA Current Address Pointer
|
|
register */
|
|
unsigned short irq_status; /* DMA irq status register */
|
|
unsigned short dummy6;
|
|
|
|
unsigned short peripheral_map; /* DMA peripheral map register */
|
|
unsigned short dummy7;
|
|
|
|
unsigned short curr_x_count; /* DMA Current x-count register */
|
|
unsigned short dummy8;
|
|
|
|
unsigned long reserved2;
|
|
|
|
unsigned short curr_y_count; /* DMA Current y-count register */
|
|
unsigned short dummy9;
|
|
|
|
unsigned long reserved3;
|
|
|
|
};
|
|
|
|
typedef irqreturn_t(*dma_interrupt_t) (int irq, void *dev_id);
|
|
|
|
struct dma_channel {
|
|
struct mutex dmalock;
|
|
char *device_id;
|
|
enum dma_chan_status chan_status;
|
|
struct dma_register *regs;
|
|
struct dmasg *sg; /* large mode descriptor */
|
|
unsigned int ctrl_num; /* controller number */
|
|
dma_interrupt_t irq_callback;
|
|
void *data;
|
|
unsigned int dma_enable_flag;
|
|
unsigned int loopback_flag;
|
|
#ifdef CONFIG_PM
|
|
unsigned short saved_peripheral_map;
|
|
#endif
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
int blackfin_dma_suspend(void);
|
|
void blackfin_dma_resume(void);
|
|
#endif
|
|
|
|
/*******************************************************************************
|
|
* DMA API's
|
|
*******************************************************************************/
|
|
/* functions to set register mode */
|
|
void set_dma_start_addr(unsigned int channel, unsigned long addr);
|
|
void set_dma_next_desc_addr(unsigned int channel, unsigned long addr);
|
|
void set_dma_curr_desc_addr(unsigned int channel, unsigned long addr);
|
|
void set_dma_x_count(unsigned int channel, unsigned short x_count);
|
|
void set_dma_x_modify(unsigned int channel, short x_modify);
|
|
void set_dma_y_count(unsigned int channel, unsigned short y_count);
|
|
void set_dma_y_modify(unsigned int channel, short y_modify);
|
|
void set_dma_config(unsigned int channel, unsigned short config);
|
|
unsigned short set_bfin_dma_config(char direction, char flow_mode,
|
|
char intr_mode, char dma_mode, char width,
|
|
char syncmode);
|
|
void set_dma_curr_addr(unsigned int channel, unsigned long addr);
|
|
|
|
/* get curr status for polling */
|
|
unsigned short get_dma_curr_irqstat(unsigned int channel);
|
|
unsigned short get_dma_curr_xcount(unsigned int channel);
|
|
unsigned short get_dma_curr_ycount(unsigned int channel);
|
|
unsigned long get_dma_next_desc_ptr(unsigned int channel);
|
|
unsigned long get_dma_curr_desc_ptr(unsigned int channel);
|
|
unsigned long get_dma_curr_addr(unsigned int channel);
|
|
|
|
/* set large DMA mode descriptor */
|
|
void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg);
|
|
|
|
/* check if current channel is in use */
|
|
int dma_channel_active(unsigned int channel);
|
|
|
|
/* common functions must be called in any mode */
|
|
void free_dma(unsigned int channel);
|
|
int dma_channel_active(unsigned int channel); /* check if a channel is in use */
|
|
void disable_dma(unsigned int channel);
|
|
void enable_dma(unsigned int channel);
|
|
int request_dma(unsigned int channel, char *device_id);
|
|
int set_dma_callback(unsigned int channel, dma_interrupt_t callback,
|
|
void *data);
|
|
void dma_disable_irq(unsigned int channel);
|
|
void dma_enable_irq(unsigned int channel);
|
|
void clear_dma_irqstat(unsigned int channel);
|
|
void *dma_memcpy(void *dest, const void *src, size_t count);
|
|
void *safe_dma_memcpy(void *dest, const void *src, size_t count);
|
|
|
|
extern int channel2irq(unsigned int channel);
|
|
extern struct dma_register *dma_io_base_addr[MAX_BLACKFIN_DMA_CHANNEL];
|
|
|
|
#endif
|