OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   + t. P4 N& }% v7 @6 M3 [& ^
2. /*
   # @, p) ]/ y- t0 f; Z" D# k( L1 K
3. * edma_test.c
   / y! B% B% ], ^; W- v/ L# d2 i( L" I4 e
4. *
   
5. * brief  EDMA3 Test Application
   ' e. Y* j/ E  Y8 D
6. *
   . F# o& j( ]1 D2 P* ~
7. *   This file contains EDMA3 Test code.
   8 {2 N$ Q8 A; [/ `! }2 F/ r' n) `4 z
8. *
   / h) y7 z! F/ ]
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ) b9 z! U1 q6 `* `% _
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    5 S3 u, n# R+ M- M4 {3 V
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
    * l1 ]' c: ~& j, f1 O7 c( R
17. * published by the Free Software Foundation version 2.
    $ A! E6 ]: K" h
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    : w0 t" y0 n/ y) m7 {
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    8 V5 s  |! D. z* y, q( \+ c
23. */
    7 e. |/ e1 G+ A' {
24. 
    1 H# [  x- v( l" {
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    . R4 o' W% H( d" |" N& M
29. #include <linux/interrupt.h>
    ! T. U) h  ?  a; H7 v; k! t
30. #include <asm/io.h>
    ) r5 `0 B+ _7 }0 U2 |( ?; m& X
31. #include <linux/moduleparam.h>
    - _$ a& z2 _2 g* m0 u" W0 S9 {5 \( M
32. #include <linux/sysctl.h>
    - F9 ~- D; }6 c( O; Z' t8 e
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    , G/ g7 j, T5 R! }8 h* I
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    3 c. T9 P, [7 N( P
38. #include <mach/irqs.h>
    2 L$ o: `+ Q: e
39. #include <asm/hardware/edma.h>
    6 y. z  `, y, t* p) }2 W8 d
40. 
    & A& H; ~+ ~% ?7 _7 W
41. #undef EDMA3_DEBUG
    & P2 ^: L8 M+ D/ k) b# \
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
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__)
    6 C0 N5 ^2 q# q- o0 q9 [
48. #else
    % I: M& ~: S" r9 o
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ' J& n& [1 a" t6 H
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    2 G9 O! C+ _& R. j* E
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    * X% M4 d% U+ U2 G
62. static volatile int irqraised2 = 0;
    7 T8 o* T( ^/ r' g% s9 ~
63. 
    ' N) \7 q/ r, j- K/ 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);
    & z7 y" y  u2 }8 m# [' s
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    * I" C4 {: u) ~  O/ O" n$ b
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
      A# ?% j  M) I) ~! o. i' G1 y6 }
72. 
    ( `4 ^+ M% G; m$ S$ s
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ) n9 r7 m9 z; Q2 `* f7 J- R5 b* I! `
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    + S! b$ R: B+ S3 V
79. static int bcnt = 8;
    ! p) b  q5 z- o( a# h/ L/ U
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

" i& ]( v, u, L* Y5 q' o      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
( W, l/ @3 u7 Xarm-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。
* J; B% _* k, E# i) C/ G: O     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
7 x; k2 S) y" n( B
- u4 ]  \, X, v/ k" \