OMAPL138如何在Linux下使用EDMA3驱动

yyj

; [/ j3 n, K: E7 t

1. [code]EDMA sample test application
   , t% L3 ~3 }+ Y( {
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   5 Q7 m1 Q' T4 ^- U$ N8 F* h& W6 z
7. *   This file contains EDMA3 Test code.
   , E4 J( ~' m1 B6 B2 i8 n7 G
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    % F( n, N. F) Q0 n+ F% Q. K2 H
12. *
    ( S3 G- d; ~0 ?- ^- O" F
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ) }8 h4 Z' l. m' g7 l* B
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    2 O6 w% I4 f$ [8 W
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    3 k" c" `( h: v
20. * kind, whether express or implied; without even the implied warranty
    0 D% @6 t9 ~* O% W
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - M* [9 q, r/ F( E8 h6 e
22. * GNU General Public License for more details.
    ! i0 w+ p% k. n7 E7 E2 c. t
23. */
    
24. 
    3 P) K5 R4 e, G; p
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ; `7 N9 q. f+ k2 z
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    1 |8 I: o3 M* Z' L& U$ `- U/ _! A
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    $ L8 S7 g  C  C+ O' @# u" X+ p
34. #include <linux/dma-mapping.h>
    . O; l& b+ B+ j$ W) e
35. 
    
36. #include <mach/memory.h>
    ( f8 o9 a6 ]6 D) T2 ^3 W6 K
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 D3 f$ ]; G' D7 f5 |
39. #include <asm/hardware/edma.h>
    
40. 
    4 q: Q- _4 `* n9 }1 e
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
      j+ J+ j  Z' P& y" Y% M
43. 
    0 O+ _' ~9 V. l3 f% ?0 U% W2 |
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( z; k$ o$ q; s: c" o
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    2 E. o( k3 j- X& n
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . `% C0 N$ n# G. _2 k
48. #else
    1 y/ n  S6 u3 G0 j( B
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    : K$ P! n% W: G; M/ U
51. #define DMA_FN_OUT
    4 {* V; z; _7 G( V! ?; [8 S
52. #endif
    
53. 
    # Y9 y9 H4 o) Y3 r3 E! d1 l
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    8 M+ G) Z/ \% @; z
56. #define TCINTEN_SHIFT               20
    2 \+ j9 c' T( {- N# l& k/ U
57. #define ITCINTEN_SHIFT              21
    $ @  w6 }  J' }% V# k. ^
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    + Z0 f$ S# @) Y7 j
60. 
    
61. static volatile int irqraised1 = 0;
    7 z! A( [! M9 H" U
62. static volatile int irqraised2 = 0;
    - w$ H; A, ^. p5 [* |+ G8 u  J
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! o. d# i; a0 a) T( Q9 z. l
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    2 H$ U0 y+ c3 M! O2 W- [
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    2 t* v+ h  V0 _' V* H
73. char *dmabufsrc1 = NULL;
    % \' n% M* q6 A: X
74. char *dmabufsrc2 = NULL;
    3 p. c* \( y& K- Z
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    $ z% K( }" c/ t7 C) R  Y5 O
78. static int acnt = 512;
    / U1 q7 c, V2 R# N6 X' k! q+ ^, V
79. static int bcnt = 8;
    2 a& B- L  F+ y% ^3 G
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    # q8 w- Z: ^; E$ l, u  q
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

& j3 |* ^, g) X0 D      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。


6 B8 A5 I8 ]/ A/ u& U) \. ^2 x9 z