OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   7 B3 x( m! p4 I/ {% f
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   * E' h/ f* }$ T4 s
8. *
   " B# H0 C+ @; A( i& D- P- F
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - \$ H+ a4 A7 ?3 b1 V) b6 H
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    ; R8 o  _; V$ r4 w' X  a& l# l9 R
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    7 o6 V8 S) z- D2 q% Y# R
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
    + n3 o- Q# C) Q- w6 {' v; i' A) Z
17. * published by the Free Software Foundation version 2.
    % N; j. J, x1 E; r
18. *
    & U7 z* {4 Z( ]! L6 @
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    6 ~6 B9 L  y  @" T% }
20. * kind, whether express or implied; without even the implied warranty
    5 s' W) ]0 I; }1 v5 N4 `" T' Z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    - l( j$ A- k- N: Z4 }% B
24. 
    
25. #include <linux/module.h>
    7 a! }8 g! m+ H3 @" I
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    # N1 m. U9 f- d, V
28. #include <linux/types.h>
    1 t4 L; b# C+ w1 S) B( b" g
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    & A& ~+ w" g3 v2 [  i, O2 P
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    4 D, w1 |3 F8 v6 C
34. #include <linux/dma-mapping.h>
    8 x6 x# L: e2 F1 l  y: X
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    1 R% {( y1 |# o6 f; `" l( J: Y& v
38. #include <mach/irqs.h>
    ( j5 G$ q  o7 K8 Z! n
39. #include <asm/hardware/edma.h>
    7 c+ [+ u! a! `7 N- ?& l. T1 t
40. 
    % {6 V: L+ ?$ U
41. #undef EDMA3_DEBUG
    , k: |5 _5 f3 Q, D+ I1 B- `3 t/ ]
42. /*#define EDMA3_DEBUG*/
    . ^+ v/ m0 H  q0 W
43. 
    ' n4 B) d9 I3 _. Z' D" a0 V
44. #ifdef EDMA3_DEBUG
    ( r: o2 s* r# j2 q" U
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
    ( H$ x- K+ S6 B! }
49. #define DMA_PRINTK( x... )
    ) R; f- ?* X7 J6 n9 |0 c
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    + ~7 X) t1 f. j8 {, L( C
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    " ]6 ]' W; r3 Y) z( J4 ]2 q) F* E
57. #define ITCINTEN_SHIFT              21
    7 N. t7 V$ N6 w6 x) }" Z
58. #define TCCHEN_SHIFT                22
    6 M- l2 ]  L4 S! j# ?+ w
59. #define ITCCHEN_SHIFT               23
    % I: a+ U/ ]2 z. ^) T/ |
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / [5 @5 ^$ I4 C- k5 B" B! t/ W
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 K" L$ a* U% n8 p& v, c0 r3 e) |
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 p4 u3 F+ b, m7 Q6 H$ x: `# D
68. dma_addr_t dmaphyssrc1 = 0;
      O3 Z3 N3 h1 o. L: @3 `
69. dma_addr_t dmaphyssrc2 = 0;
    : [4 W3 {- C# z* ~! A8 Z
70. dma_addr_t dmaphysdest1 = 0;
    - z0 _; A5 Z4 m- G9 i. `
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    & s( R2 ?/ g" n( r" k' r. W
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    6 j* x( ~7 v& m8 N; y) U7 T
78. static int acnt = 512;
    * u' R9 A( P! m& h6 y8 J
79. static int bcnt = 8;
    ' {5 K. L2 c! D2 F9 T3 E
80. static int ccnt = 8;
    
81. 
    2 U( ]. j0 T( c5 G9 l* J: [  Q
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

' F+ f/ R5 L* d  U' B8 d
! \6 K9 w* j/ a0 G9 b5 {# V+ \      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。
0 o5 G( Y, |! |, L( e2 s6 U     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
& n' s3 w5 S; K' P
* r8 a# U0 C# M: a& V
) \3 J/ f/ _4 K2 d+ _, [7 J