OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ' B/ K$ t9 z- b: w1 R# K: t3 s
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   + L8 W, K8 m, |, Q6 K) c
6. *
   
7. *   This file contains EDMA3 Test code.
   " i1 z" e0 C& q- q$ Q2 h) o* V4 o
8. *
   
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
    
11. *         TO CHANGE.
    1 ?- s7 y& n2 O2 Y. s; d" a1 u
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    2 T2 L6 m3 h8 ^& ?
14. *
    # l- N5 g+ q1 A
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , C# c  @1 w1 E. J
20. * kind, whether express or implied; without even the implied warranty
    2 T( K9 U  a2 S! J* W7 ]$ a- c% H5 k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    / P) j. `  I: Z9 x$ _; D5 u' z
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    - c; s6 e' ?6 y+ c9 t# r* C
26. #include <linux/init.h>
    * J/ Q9 S, q+ H* R, {% v# [+ S
27. #include <linux/errno.h>
    , Q" |4 r4 ]4 d) i4 @* D; @5 E+ s# E
28. #include <linux/types.h>
    / V$ }& C2 @$ O5 T: F' A
29. #include <linux/interrupt.h>
    4 M7 V/ V7 q6 r: @  @
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    " F8 b; f) D" v  n8 C8 K
32. #include <linux/sysctl.h>
    * S6 u; e; m- _9 W, z. |* Q% Z, j$ Z
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    * ]/ j7 Z2 L( B9 ]5 E2 E% i. s* i
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    1 n3 @* Y1 Y; b  Y# Z' S
40. 
    
41. #undef EDMA3_DEBUG
    ( C: [. g* m3 \  T$ [
42. /*#define EDMA3_DEBUG*/
      e3 F: F% A) x
43. 
    9 Y+ `( W1 ~& H( z! T, ]
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' a9 g! f" {* j; g
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 b5 |2 m9 R8 I3 O3 M4 ?3 B* p
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    : x0 Q$ |1 L* t/ J( s: m
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    6 y, s# D5 q: z) W* f% ~
53. 
    ' d5 e# J( a4 ?9 V
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    6 n) b8 w; G3 y
58. #define TCCHEN_SHIFT                22
    ; r! l' ^5 D4 N' }1 R0 M2 t
59. #define ITCCHEN_SHIFT               23
    # H$ P( z4 ]; c  Y" G
60. 
    ( j* L! e+ W& j% m7 F/ @. N
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    , y; {5 Z2 H6 I% M( O
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % \( @5 K2 E: c# Z1 a* O9 [" H. 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);
    ; S. k& X1 }1 f& U/ r0 F
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    , i9 a$ m! v5 B3 @
69. dma_addr_t dmaphyssrc2 = 0;
    ; u' f8 S2 W7 H* a; j+ t8 Q
70. dma_addr_t dmaphysdest1 = 0;
    8 N6 s& T& G; R# g  o) L  x& I# V
71. dma_addr_t dmaphysdest2 = 0;
    ( }( `3 N$ q" Z, ~/ e4 S
72. 
    
73. char *dmabufsrc1 = NULL;
    * P, L8 [2 ?) ?: G6 }  `* x
74. char *dmabufsrc2 = NULL;
    9 y( j$ m1 c5 Q+ ]8 y- e- T
75. char *dmabufdest1 = NULL;
    & a5 j7 k5 @- C9 A) `$ A
76. char *dmabufdest2 = NULL;
    
77. 
    ) R/ b+ [# @2 p1 ]! ~$ \
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    " z4 ~0 C; l' ?4 c$ ~
82. module_param(acnt, int, S_IRUGO);
    + j- @6 m, ?! v+ Y  ~  s% e
83. module_param(bcnt, int, S_IRUGO);
    * X, m3 I4 q0 u; Y! q9 W# t1 `! a
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
8 H( P9 L+ `' o/ s0 M1 [3 e6 o8 Rarm-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。


2 O2 [% N4 a" E: F2 d3 B