OMAPL138如何在Linux下使用EDMA3驱动

yyj

4 ~. G: |( h  e. P7 o

1. [code]EDMA sample test application
   ; i" f- q* C( b* o# e. |" u) }
2. /*
   
3. * edma_test.c
   
4. *
   - c; C1 u3 X4 g* k  D
5. * brief  EDMA3 Test Application
   & T6 J' t; {9 ~/ G0 \1 T% I# `0 o
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 v( w3 `# |0 p0 I
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    2 K, {8 A) y% I5 F
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    - {9 H$ g  S1 U1 `, {& N
14. *
    7 U7 K/ y, v- y7 J8 \
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
    % q$ Z& ]! B" Z6 O( V7 Y6 K% b
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , V# G/ X# ~2 b9 K
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    . p+ @, N& ?& g% o2 X& f9 q/ j7 d% I
23. */
    
24. 
    * o1 s# T, J# D' {3 K' S" W1 G3 i. ^
25. #include <linux/module.h>
    9 U4 O  M7 b; W% l4 `% k7 S
26. #include <linux/init.h>
    ! W' K  e( u7 }$ V. M- i, ?
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    . i& u* x" g" K/ O* z
29. #include <linux/interrupt.h>
    $ C9 A  F: r2 C) t7 i3 x& X
30. #include <asm/io.h>
    # u8 u! l. q% o7 |* U
31. #include <linux/moduleparam.h>
    + o8 ?6 ^& f3 F
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    1 d9 {0 Q& [3 l+ [0 Q$ a5 N
34. #include <linux/dma-mapping.h>
    
35. 
    3 P% {, G. x3 G1 x: S
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    3 a! n- p; \0 Q
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ) c0 z1 E8 v* M$ i. A
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    1 H6 x' u1 d7 t
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    + l% x. U* B! t- G1 I
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    4 N6 I# ^; _; E2 S0 C+ R/ m2 x
49. #define DMA_PRINTK( x... )
    1 ^1 `- a- y* t5 I  R7 O  p
50. #define DMA_FN_IN
    * K* ^' O) S7 U. N+ R5 o9 h
51. #define DMA_FN_OUT
    9 U: d4 k6 d% A8 I) C+ B
52. #endif
    + v& X2 L/ Q- C2 S  T( ?7 k
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ' `" _: Y! ]; r6 K3 |3 C1 E
55. #define STATIC_SHIFT                3
    5 w' u! E( @, x
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ; U9 r( Q  {- e+ u
59. #define ITCCHEN_SHIFT               23
    % c$ U( m! ^  f7 J! a# n# c
60. 
    
61. static volatile int irqraised1 = 0;
    0 c7 q& i- r4 e$ Y, v+ x7 D
62. static volatile int irqraised2 = 0;
    
63. 
    6 B" ^( ]6 I4 n: V3 e# Z
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);
    : H4 c3 A& ?; F1 I/ [' |
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    + t: B2 b. g- W
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    2 g+ j. {6 G* F
71. dma_addr_t dmaphysdest2 = 0;
    / I4 H0 P# V3 X6 d) R+ Z, t2 g, S9 {
72. 
    
73. char *dmabufsrc1 = NULL;
    , n- D+ F1 u; v+ ^  c$ D
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ; z' K2 z( `' B
77. 
    # k3 \) f: X/ p
78. static int acnt = 512;
    2 u2 F3 n+ g, U
79. static int bcnt = 8;
    7 N7 F3 T% E5 _9 v; \1 B" U
80. static int ccnt = 8;
    : Q8 j. Q( U- A9 ~) M5 N
81. 
    1 u1 z* D. |5 ~! n! W. E# `
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    , a8 f  d' }! z: Y
84. module_param(ccnt, int, S_IRUGO);

复制代码

# F) ]' M/ f. m% b5 a3 h3 Q7 N
      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。
5 G/ O- ^5 `( L( p
, H" i* w% O3 V7 ?$ p! P
4 j* M! @) W+ a. S' |