OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   1 @  Q% q2 j$ b- t) n! N& l! T) O
5. * brief  EDMA3 Test Application
     x( w& k& g9 O9 `. ]# K
6. *
   
7. *   This file contains EDMA3 Test code.
   + q, x8 Y# ?- M' }
8. *
   : }, ^6 F, Q; `. D# Y+ C1 n. a; b& [
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
    * t+ c9 K; ^9 [) g1 u7 S
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
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
    : K# `5 _, o; X" @/ P
17. * published by the Free Software Foundation version 2.
    
18. *
    ; S* R7 `2 o" b/ t& F8 O3 M
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    $ P9 f2 Z/ A) @
20. * kind, whether express or implied; without even the implied warranty
    1 d# b- t. p3 R2 E' p5 H* d
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    - F4 |5 D) R( ^8 X7 [
24. 
    : a' P5 N. f) q2 R
25. #include <linux/module.h>
    4 K5 Y( m% m/ x; L  h2 i4 n: ^
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    9 U1 C' v0 A" e: w% z$ N1 ]6 P( F
28. #include <linux/types.h>
    $ W3 U8 v* a4 O7 N$ z. S$ C5 A
29. #include <linux/interrupt.h>
    # s7 I4 c+ K0 P# i) d+ t
30. #include <asm/io.h>
    - O! U- h0 S/ w( t9 c, @
31. #include <linux/moduleparam.h>
    8 h* s! w5 v" g5 m! P  I
32. #include <linux/sysctl.h>
    : }$ t* ^) d2 O/ ~1 p
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    / T' {) |- c" z
35. 
    ! j% K+ V' n6 Q' B' C
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    + B. R; E# J, I; q2 @
39. #include <asm/hardware/edma.h>
    # g9 [/ y* n3 }+ _( x2 |! q& j% W0 E
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . t  E  J; T& d2 h5 O/ x
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    & d8 F' W, v* ?% |" ~% Q
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    8 r# \6 w2 F8 S/ q+ e6 a* P. X
48. #else
    + x# P/ j$ C: T4 o! [
49. #define DMA_PRINTK( x... )
    ) W* h& ^, c; x! l$ P; q$ [8 {
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 c5 S) k3 N' o2 S8 {1 G. i/ l
52. #endif
    8 ?; d" Y3 A) A0 x; ~  s
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    4 B: }6 M8 k& V( s
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    2 \0 l; X" Y  l6 w0 y. I
60. 
    
61. static volatile int irqraised1 = 0;
    ; w6 M# z$ \* s5 V: D- O. U; V( S
62. static volatile int irqraised2 = 0;
    8 A9 Q/ N) _+ n3 {7 }
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % Z- o, d# r+ x! G. G; j# \( g
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);
    % s0 e8 T2 V+ O2 Z0 E
67. 
    7 E7 P5 \$ ?: p2 q2 E5 x
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    + a! j7 {# U0 l9 U8 [! b% a
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    7 s) T6 s( |' L
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      h, V% R5 w, k; U6 F2 F0 r
76. char *dmabufdest2 = NULL;
    8 h# P, z! @+ [; J  y3 L
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    1 {. o& G5 F- k7 Q9 q
81. 
    
82. module_param(acnt, int, S_IRUGO);
    & c+ V. e) d8 z5 i5 T+ h
83. module_param(bcnt, int, S_IRUGO);
    " n$ }9 S+ K8 o: Y
84. module_param(ccnt, int, S_IRUGO);

复制代码

+ p7 ?1 J( @  L1 W! M# j; [
      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
6 L( q3 v; X, U& S" k: S" E  h) d" Farm-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。

$ A  f: W6 F5 z% C( B) I
* Q, x2 {% G4 L% a+ O