OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   , R% H. w& V$ g4 S8 ^
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   * b% }4 @5 X# ]/ s4 @  @+ `7 r
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 ]! E/ ?* M/ t: p9 X  w
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    9 \% p. B$ i8 ]8 c
12. *
    7 {# A6 n1 E+ X
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    + b+ Z# U5 _! y) R9 m
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    # }+ e/ ?' v& 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
    & i8 r. c* ~! u$ N+ o9 a
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ; }. e9 Y. u7 i  O' L4 Y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    " @" g1 V; D8 ]; c1 G6 Y
30. #include <asm/io.h>
    / a/ r, Q8 x% m8 N9 h
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    0 {2 r' ]( x- v; C: G& ^6 T; T
39. #include <asm/hardware/edma.h>
    * w( e, r8 W# M: |9 H' j
40. 
      ~8 F  ^& e6 K1 Q5 {% s# n
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    - Y: d7 A0 @3 c, W
43. 
    ; \0 [- X. m: e0 a' k
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__)
    
48. #else
    1 m  r9 ?/ L% S% i* |# k
49. #define DMA_PRINTK( x... )
    8 I1 j7 t* b* P1 e9 z( j: l
50. #define DMA_FN_IN
    / a4 ~& V0 Q: q7 s
51. #define DMA_FN_OUT
    
52. #endif
    ! C$ r) U! E7 t: v/ T8 n- g( ?0 B
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    0 X0 Q2 B- {9 x: Q9 @
56. #define TCINTEN_SHIFT               20
    . f& k' X! K% ~- e# G6 _8 p9 q
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ( x) L" |$ S8 U2 q& B2 t1 W
59. #define ITCCHEN_SHIFT               23
    7 k8 u% x5 ]7 ?
60. 
    6 x: e3 z5 ^0 T, d* \/ M% s8 ]
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    - V9 \& _, |% a0 G. m" U$ ?
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! t4 d4 v) s; r
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. 
    6 T# b; K* s/ M' A& V  h) |
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    8 }2 k9 t1 \6 A6 |: A6 u
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    0 I7 r1 Y6 C1 ]- @5 i# \, a
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    * b) I1 W1 }1 K/ ^( D
75. char *dmabufdest1 = NULL;
    ; O" }; W% U8 d7 S% M/ c9 w5 b
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    % b( C+ ]9 y) ]$ S
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ) g+ ?5 O) O5 i5 c5 D% C3 v, ?
83. module_param(bcnt, int, S_IRUGO);
      n: H% p! N- K7 Y
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 H2 e6 D" t7 C4 H
      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
4 {! X& \* s( y( I7 _6 e6 ~