OMAPL138如何在Linux下使用EDMA3驱动

yyj

, B4 s# L  _3 H8 |$ E7 X

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
     j5 d6 r$ z5 P  h( c9 Z
5. * brief  EDMA3 Test Application
   
6. *
   - q/ F- }! \$ h
7. *   This file contains EDMA3 Test code.
   4 e6 |$ I5 B+ D) \4 L7 Y
8. *
   % a! H1 c' d9 p$ ~
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
    6 z5 h# D3 L1 \6 Q
11. *         TO CHANGE.
    ( }1 f" k8 S0 J: b, B: D# D
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ( ]8 x- O3 z6 Q2 ^! F8 v3 `
14. *
    
15. * This program is free software; you can redistribute it and/or
    7 h. f' V! r5 x) q" X7 s
16. * modify it under the terms of the GNU General Public License as
    ' Q) M7 ?! w$ u0 w, G$ r) d
17. * published by the Free Software Foundation version 2.
    $ {$ d4 N1 k- n3 N; w5 ?6 w3 M, D/ O
18. *
    ; j) a) s* i! c2 y0 s' A
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    . o- m2 `* ?: V+ {2 i. d! \
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % K3 S; t0 e/ ~' P' m; {
22. * GNU General Public License for more details.
    & q' G; C; R- v5 Y; D
23. */
    
24. 
    . S3 ^6 {7 k; \0 d/ |2 F
25. #include <linux/module.h>
    $ _$ e5 l0 M) }& `* F5 B8 K
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    " j: T9 x7 X4 f. h- @# Y) F
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    " l. y3 C9 r: B
30. #include <asm/io.h>
    ' u/ e% {6 a- f" t& ?
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ' |0 \+ U, T, O( k$ O  T
33. #include <linux/mm.h>
    0 X3 o# u7 f/ R
34. #include <linux/dma-mapping.h>
    : y" M: M5 N8 g' S8 f
35. 
    + p6 k3 X& a! D, O8 e
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    * O+ G( O; E, j3 q) W
38. #include <mach/irqs.h>
    1 Y; }- h6 ?  W/ l
39. #include <asm/hardware/edma.h>
    
40. 
    5 E8 S; T- T4 ^4 C7 }
41. #undef EDMA3_DEBUG
    4 ~' ^1 B" O. d, d  I" ^
42. /*#define EDMA3_DEBUG*/
    1 @; C0 t8 J$ t: i" B, H3 ^0 M
43. 
    7 i# i+ j4 ?" f$ G0 Z
44. #ifdef EDMA3_DEBUG
    + Q. c6 ^6 Z* @% }! m* K7 w
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__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    & E/ S& F& s  A" O% i
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ( W6 T, M8 ]' h6 |: q& ]! \
57. #define ITCINTEN_SHIFT              21
    ) D* V; o0 z& M5 ^, n; p
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    # _; Z; A$ `8 C8 a1 ^- ?3 E
62. static volatile int irqraised2 = 0;
    
63. 
    3 M  `# X3 A' p& X5 R7 R
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. 
    5 `% K- L! L  G/ k+ L5 K
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - o$ ?; B3 [5 ~7 m# f$ [- Y
71. dma_addr_t dmaphysdest2 = 0;
    * W* P4 V4 |, c# @$ l
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
      @) c# [" u2 ?, B; T# G* A: r
78. static int acnt = 512;
    
79. static int bcnt = 8;
    5 W( P- h, i- R
80. static int ccnt = 8;
    % ]& j- ~' b- e0 w5 `- f
81. 
    ) R! _' V" M) U( [5 E) Y% Q
82. module_param(acnt, int, S_IRUGO);
    5 _; P- Q8 U3 H% Z& r( M
83. module_param(bcnt, int, S_IRUGO);
    4 ], j5 j4 M! h) a" g9 i/ I) J
84. module_param(ccnt, int, S_IRUGO);

复制代码

  N5 e$ I4 [  ~; b* t% E" _
  z. ^% `  u9 v" G6 q      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
- _4 z( l8 @' f( Y, k( Varm-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。
- Z2 f! V( F  J

$ A: O3 L' q( W0 J