OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   & Z8 U9 h' E+ K3 G8 n; o
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ) P; X+ w1 G) c2 P6 t6 u
6. *
   : v" [% F( P  ~) F7 v" m/ b7 W
7. *   This file contains EDMA3 Test code.
   0 Y- a* g  W! q1 h6 b$ j
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.
    % b' U; h, ~( \
12. *
    ! S5 N5 m+ y$ A; \' b3 |
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , V3 z# |" C7 A8 c: G4 m, x% t
20. * kind, whether express or implied; without even the implied warranty
    ! X3 X4 e6 K3 `4 D$ G
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    # C4 C# v9 a% w/ n$ E  s5 f
23. */
    
24. 
    ' I7 k) C6 Q9 w3 W' s4 f
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    9 |3 p6 y7 v' P6 R
30. #include <asm/io.h>
    ' B0 H( C- u! ]- Y& p. P1 X) G
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    % a5 p  A$ x) s$ X" p
33. #include <linux/mm.h>
    0 D$ O  G; e6 f. M" h4 g2 W
34. #include <linux/dma-mapping.h>
    + A+ |+ W. ~* Z. \5 h2 P) I5 f
35. 
    
36. #include <mach/memory.h>
    * X  s! M7 n3 P" x
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
      o/ H9 T# m2 s0 N1 T) a$ o
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    : c) S3 O' V' M8 `, Z- V( {
44. #ifdef EDMA3_DEBUG
    7 ?/ \& b! P& [7 V1 t2 L7 k
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__)
    ) N& t1 M1 n3 r* @
48. #else
    0 ~, M' M! f2 n9 ^
49. #define DMA_PRINTK( x... )
    " I# o* f1 N5 b! o0 ~: Z. V2 M
50. #define DMA_FN_IN
    8 o7 B+ |1 |0 ]- \7 \
51. #define DMA_FN_OUT
    7 v$ X* D- ?+ B1 A, e" R8 \1 t
52. #endif
    ; ?  ]8 X' F/ A/ t7 M0 u# _. J
53. 
    & l: f+ Z* j9 w: F( b
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    8 C" M' W9 J3 L
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    - j7 e7 n6 Y: Z- t' S' n; e3 \& V
59. #define ITCCHEN_SHIFT               23
    * Q6 ^0 u# A# W* U! J
60. 
    
61. static volatile int irqraised1 = 0;
    ( b' Z& I% {: X9 N$ ~3 k
62. static volatile int irqraised2 = 0;
    % H- i; B# F' U* f: F9 o5 k- u
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - w& k; F8 f! Y! Y$ m. T; {
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. 
    4 e8 Q0 A6 Z) }1 d
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    1 d$ F) Z+ n- h2 H/ a: F8 e
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    * C! {0 _4 {/ h  ?
72. 
    2 E" p$ ]) U0 d" l- _' N
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    . r& k5 k( |4 g3 d' ^
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ' J1 ]7 s% I4 \0 G: y$ y, y3 ^) e7 w
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

; ~* J) Q# o0 z) ^/ w      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
+ a8 H- m0 t6 ]" L" L7 Farm-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。
. I! C9 V. X$ Q$ m/ l, ~2 q+ S