OMAPL138如何在Linux下使用EDMA3驱动

yyj · 发表于 2018-1-30 11:01:43

本帖最后由 yyj 于 2018-1-30 11:01 编辑

[code]EDMA sample test application
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/*
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* edma_test.c% | r7 G3 H [ F/ C
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* brief EDMA3 Test Application
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* This file contains EDMA3 Test code.5 `- c' ^# o7 t" a# n/ ~
*
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* NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
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* REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT/ m. m6 P8 L6 t" f- W) t7 K& g
* TO CHANGE.& p" t* {7 X% f$ A4 B5 i
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/# @* f# ?2 g' a
*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as7 T7 T) [8 n4 W+ _! s
* published by the Free Software Foundation version 2.7 m" W! T, q2 {3 y
*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any0 p6 j2 ?' d5 R
* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.1 r+ T5 S" t _/ F+ ^
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#include <linux/module.h>
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#include <linux/init.h>% r( Y( S9 I- T! n7 C
#include <linux/errno.h>2 @+ e' Y. b7 t: G; T6 `/ r% [' o0 V
#include <linux/types.h>) X& ~' p: C q
#include <linux/interrupt.h>* \- k1 b. }$ i" x7 r
#include <asm/io.h>, J" [6 ]3 X! {+ X9 I* K: J
#include <linux/moduleparam.h>
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#include <linux/sysctl.h>" |" E5 z/ y2 a" A' K' e
#include <linux/mm.h>/ o4 E G# c2 G6 Z# x9 `
#include <linux/dma-mapping.h>. [+ @% m8 a/ s# g
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#include <mach/memory.h>! Y ^# N% l: f8 q( Q; E6 t+ b+ y
#include <mach/hardware.h>' J6 X( b* y1 A7 a+ |3 w7 S% b
#include <mach/irqs.h>1 m* [" P* m/ c4 s/ X
#include <asm/hardware/edma.h>, `) j) }9 t/ x' V
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#undef EDMA3_DEBUG
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/*#define EDMA3_DEBUG*/$ c$ N# h( O6 f# B, a
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#ifdef EDMA3_DEBUG5 Q$ r: `+ Z1 l9 ]
#define DMA_PRINTK(ARGS...) printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)2 l2 ^7 R/ X1 C! ]) p
#define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
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#define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
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#else- U0 ^% B! R' h& m) z
#define DMA_PRINTK( x... )" R1 Z( }# S) d! W2 ^% \8 g. g7 z
#define DMA_FN_IN7 I8 q9 n. ?6 z5 U
#define DMA_FN_OUT! O ]+ S! U+ r8 _0 \; n8 U
#endif
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#define MAX_DMA_TRANSFER_IN_BYTES (32768)& N" v# z2 r; D* c
#define STATIC_SHIFT 3
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#define TCINTEN_SHIFT 20
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#define ITCINTEN_SHIFT 21- i8 C7 [+ x4 v6 V
#define TCCHEN_SHIFT 22: y: R" C5 p4 q: V
#define ITCCHEN_SHIFT 23
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static volatile int irqraised1 = 0;0 A7 V! E( K8 o1 E' H/ Y
static volatile int irqraised2 = 0;
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int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);2 v. r- t+ }! B2 @8 K% x$ ~
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dma_addr_t dmaphyssrc1 = 0;7 K- [0 o- N% T5 @1 p, h
dma_addr_t dmaphyssrc2 = 0;/ x( j6 @) c! G/ y; N
dma_addr_t dmaphysdest1 = 0;8 u1 d$ W; `! C6 y$ \6 S& X" E' y9 b
dma_addr_t dmaphysdest2 = 0;' r* ?1 I& C& W3 E1 |/ ~7 b
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char *dmabufsrc1 = NULL;
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char *dmabufsrc2 = NULL; f C0 i% Y. @! i" t
char *dmabufdest1 = NULL;- m A, u9 X- Y1 i# i: n
char *dmabufdest2 = NULL;
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static int acnt = 512;
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static int bcnt = 8;0 @4 N6 u1 O. {" b( G0 x
static int ccnt = 8;+ f. P$ m. |6 h4 w+ U- u7 A8 U
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module_param(acnt, int, S_IRUGO);
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module_param(bcnt, int, S_IRUGO);
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module_param(ccnt, int, S_IRUGO);

复制代码

   这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
arm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
   我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

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