OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   0 _& c, F1 a2 s/ B6 g% |; L1 `
2. /*
   
3. * edma_test.c
   
4. *
     l$ B' \* R4 t' U  @. w1 {
5. * brief  EDMA3 Test Application
   
6. *
   ! Q& V2 S# R' E1 w
7. *   This file contains EDMA3 Test code.
   " m: H  i/ ~5 P& l: d( g
8. *
   2 H6 r  t$ S: l) ]1 t& W" M
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   3 A1 {( o$ z- w' c4 m7 o
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    5 U, ~" Y. ]5 x& M8 l5 k; g/ y
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    5 \! X+ V* Q; k% I
14. *
    1 a! R1 d6 R9 o8 C3 [
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. *
    ; D# X% |' H1 F6 e( D+ W
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    & t0 O) g: s  ^  t
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    2 \9 [$ d  }$ N1 z
22. * GNU General Public License for more details.
    
23. */
    & E/ J, @3 }# d2 S
24. 
    . \* E% ?* g) U" J$ b  X. B
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    7 @6 Q- u# A% ^" J1 a
27. #include <linux/errno.h>
    . v: o- p: a" B% _6 e$ f, j
28. #include <linux/types.h>
    6 a: L7 Z! a" z
29. #include <linux/interrupt.h>
    ' F; W7 e# D7 \( k1 {8 J3 h
30. #include <asm/io.h>
    : T" M" X% O  A" s# ?# p
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
      C  P0 f  U, r  h" I" V$ X
33. #include <linux/mm.h>
    1 f3 [8 I( C- _" r1 Y& ?% ^
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    7 ^! y0 @8 u. O0 T
39. #include <asm/hardware/edma.h>
    
40. 
    , q- C  k4 L2 Q7 O) p
41. #undef EDMA3_DEBUG
    ) V' U) k- ^; `8 M: T# O
42. /*#define EDMA3_DEBUG*/
    ; u% k' }; `# ?  x( ^5 K8 D
43. 
    , ?* U' R( _% @; p( C7 }
44. #ifdef EDMA3_DEBUG
    3 u1 ]0 D2 Y$ |' v% I
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 @1 S, r6 z9 y* _1 f
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % h9 m- p2 Q9 b
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    # Y9 F! Y: ^; d# O+ }4 t, A
48. #else
    . }/ p+ z, P& s& K) V, }' ]) B
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    " `! b/ p% b7 _. U
52. #endif
    
53. 
    6 V" {+ s3 t' u, W
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ( i, H/ N: @; d' s/ e
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    3 W- d$ n# p9 ?. T+ v' S
60. 
    4 n: N5 ~7 h0 k8 _
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    8 |7 i0 [: D+ |" O
63. 
    
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    0 ]0 E( @6 p* G+ t) l4 v( w
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    - r& C4 B, ^' l, g6 m2 K2 S
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    3 a$ ^6 n& O! h  W
72. 
    * y' s3 d+ n9 R6 j
73. char *dmabufsrc1 = NULL;
    2 q7 x2 ]# Z- `
74. char *dmabufsrc2 = NULL;
    & }' K" k! @; L1 r1 b! _: H
75. char *dmabufdest1 = NULL;
      V" J" i5 V( }
76. char *dmabufdest2 = NULL;
    
77. 
    5 ?+ L; G, G5 g
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ) \7 `  p: B% G+ C0 ~! j+ s6 S
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
      H0 Z" m. ]" A; `4 K2 Q
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

# A* f; y9 n  s" s2 K6 c
  W2 N9 P9 F. b      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
" B" v. l% n3 Z* s2 X' O9 Yarm-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。
" k! P% `* Z& l
! s% U, @4 F2 X; b: R8 h/ }, ]; ?1 z
+ F; S: M- d, ~, ~9 J7 z