OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 ]2 b1 Q% \( S+ |

1. [code]EDMA sample test application
   * ?* K* t# n5 g  L9 b9 ]
2. /*
   
3. * edma_test.c
   
4. *
   % `+ }% q  a- A, a. @; R# q% [
5. * brief  EDMA3 Test Application
   % O! ]0 U) P6 D' {
6. *
   / y& f2 G) \% r8 }$ E) x4 u7 G7 r
7. *   This file contains EDMA3 Test code.
   0 G" s9 b/ k3 S% d* I7 p4 G
8. *
   + m: J0 v. L- y, K- P6 P& [
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 t8 t5 s  Q* t$ T
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    5 t/ }, p  M  W% j2 H# v
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
    / Q" Y1 W# l5 n& z5 K
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    $ X: X* }% g* [# o7 w! N
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.
    - S4 x/ L- T( }$ X; H9 j
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    / a" h+ A# `1 W1 G' w1 Z) v) p
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    # Y3 o: I" ?  ]/ n/ _+ o; a
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    0 @! k  q$ J8 c4 Z: p
33. #include <linux/mm.h>
    / W' f0 O& u: u4 S( O& [
34. #include <linux/dma-mapping.h>
    2 k( w- p! o- C/ }. |
35. 
    7 F' d9 x, g7 s4 d5 V: ?
36. #include <mach/memory.h>
    % E) p4 I, p# n6 _
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ' U2 ]: s! U% R7 M3 H% ~
39. #include <asm/hardware/edma.h>
    
40. 
    : Y, X0 K/ A. I, e4 y; f$ @
41. #undef EDMA3_DEBUG
    1 @/ h. B$ n( @- z
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ! [3 O$ Z# M1 P
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    : E+ c( }4 \3 W4 m6 Y2 B  K, n
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    + R; v6 Z* q2 l) ^- a/ A
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 E( f  i+ @9 p+ o. L& {
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ! W- J; z: J' T! r
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    * `1 N; h( K0 W% u3 @
59. #define ITCCHEN_SHIFT               23
    0 y, c% v1 y) v$ [7 h) K
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # d( ?. S0 F& c( a
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 M- ?4 F# p! I* `. N+ ~4 d
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! V- s* s6 A/ W1 j, U8 N( c' R& T
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    - g  v" q% _7 c! a, T* Q
69. dma_addr_t dmaphyssrc2 = 0;
    * [& H& p0 x1 U& g9 d
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    0 t7 h* I& @: e) T
72. 
    # H  e  ?9 x* n3 O
73. char *dmabufsrc1 = NULL;
    * T) Y0 G) e: M
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      C! h0 U& Z: N; e  v
76. char *dmabufdest2 = NULL;
    ) p; V4 q7 ]( ^3 l5 j) H& f
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    6 t2 K% w( k! w1 j8 Z( h% r, W
82. module_param(acnt, int, S_IRUGO);
    + e/ a' x# k/ D! Z2 T+ J% U
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

) f$ P0 h# f* U      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
* y. m/ v8 l1 j/ [2 J& l8 Marm-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。
  `: R. T7 u% v% z8 O: w( ^
" o) m, s  P/ }