OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   ! s5 K" @" T6 C
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   3 s" q" W7 w4 ?7 ]
6. *
   
7. *   This file contains EDMA3 Test code.
   + c' d; `# B) h4 x5 m5 h
8. *
   % K4 Z4 E0 |; r8 J. d4 C; l
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
    5 t& Y* f- F( K/ q. g- B3 r
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    & G+ N2 U1 I9 `( p7 H* p3 a% ~
15. * This program is free software; you can redistribute it and/or
    % X, ^; s6 E" c* S8 j& o1 e6 P
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ! P. w. ~+ Z9 R5 m* b+ @! ?% \  P
20. * kind, whether express or implied; without even the implied warranty
    8 A9 L! c0 |! f
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    ) U& q1 h6 k# u( `
25. #include <linux/module.h>
    8 m# h" w" l' @3 L3 c; y6 _' n
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    1 {2 C# r6 k% _* D/ E) b
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ! [  a' q6 D9 z( {& ~
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 Y! z2 _2 z  ~) F* l+ d
33. #include <linux/mm.h>
    $ G% B! o$ ]1 t  _6 b. C/ ^* B
34. #include <linux/dma-mapping.h>
    3 n0 W( Y# `. e* w5 f% k' q' V
35. 
    5 \8 e' z& U) r: o) _- z
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ) H! {; i" A% L( `
39. #include <asm/hardware/edma.h>
    
40. 
    5 ]1 ?" ]6 o, R$ r: Y5 O
41. #undef EDMA3_DEBUG
    8 M. R3 e9 y3 d. E! I1 P' U0 Z
42. /*#define EDMA3_DEBUG*/
    0 k. m: B" b% X4 b: O; x9 b
43. 
    
44. #ifdef EDMA3_DEBUG
    - j% a; `  H0 m" ^  i
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " b% @! ^6 Y) @/ v3 g. Z' R4 E  q
48. #else
    . l8 C9 [* R4 y' d* V2 E. W- m
49. #define DMA_PRINTK( x... )
    4 [% s( N' `# d) O# l$ ?
50. #define DMA_FN_IN
    2 r2 Q6 u$ s1 ]  @
51. #define DMA_FN_OUT
    
52. #endif
    7 P, z& X2 J/ y0 G
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 \/ u- ]% q3 L& T& D4 s3 _
55. #define STATIC_SHIFT                3
    + r' f, j8 W7 }3 f
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ' |- V- {9 P6 E" ^/ h; r& A$ z
58. #define TCCHEN_SHIFT                22
    8 A0 ~% k8 g6 n0 b* b
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    3 l' W" y7 C0 B6 J
62. static volatile int irqraised2 = 0;
    1 z8 q4 t, X0 L0 L% g
63. 
    * |: n9 N. ]' x' F2 f
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
      w6 v' Z. O8 G3 y
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 _+ X, ^0 @0 x, f9 k% W
67. 
    6 J. r% F4 V5 _! F) A/ Q
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    " Y( X: i7 s; j: }2 {
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
      m/ Q  T# ]" k/ b; Y  n1 Y7 Q
72. 
    
73. char *dmabufsrc1 = NULL;
    2 J$ {0 C- I/ c$ t1 Y5 l+ ?( d( w% x
74. char *dmabufsrc2 = NULL;
    : v: M/ M' V5 d0 q8 w6 p
75. char *dmabufdest1 = NULL;
    - b' R: V4 G' T- G
76. char *dmabufdest2 = NULL;
    % ~5 L* K$ k9 b  V
77. 
    
78. static int acnt = 512;
    ; u  R  v5 M7 C' ~, k! c  c
79. static int bcnt = 8;
    5 C  P2 W' K" j( A6 \
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    $ r% B, I: |$ L; I
84. module_param(ccnt, int, S_IRUGO);

复制代码

) z$ _* z* [& V( T. b
1 e2 U$ R+ X  Q4 a      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
2 P+ b  x! A8 k3 x" p5 C) _& L( oarm-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。
/ e/ b/ I  q9 P5 }% l/ y/ L
3 T* J4 F. c1 ~5 {( s