OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   1 J0 n) |2 T/ U+ B( H3 }6 b
2. /*
   5 s  U8 K, t* g0 U' H5 X( `
3. * edma_test.c
   ) D5 n3 w- Z7 l' E1 b/ T; g
4. *
   
5. * brief  EDMA3 Test Application
   6 Q! q6 o8 S# T+ L5 r0 L
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ' H; O6 n+ n1 m& G6 e
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.
    
12. *
    + p. s! e6 U3 t$ C
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    2 Y2 b# j" b: G
14. *
    
15. * This program is free software; you can redistribute it and/or
    3 |6 K: X: n3 y& ]; h
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
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % Q! `: b4 x2 c: P8 A
22. * GNU General Public License for more details.
    / @: h/ K0 F  }" |7 o0 T
23. */
    
24. 
    
25. #include <linux/module.h>
    ( S' G  Y/ s8 J7 [" I+ v% s/ K
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.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>
    
39. #include <asm/hardware/edma.h>
    1 N9 X' v# o0 B. O( U/ q& N6 t
40. 
    
41. #undef EDMA3_DEBUG
    # m# o. _* m6 e( \
42. /*#define EDMA3_DEBUG*/
    
43. 
    5 J/ o8 [3 G2 m- H
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__)
    * h. v' a: Z# j. U% D5 _
48. #else
    6 w# A* q( d5 k3 z
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ! i8 {- W9 j" t2 S
52. #endif
    " g. n! a- C( {  y8 D) _
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    1 J5 P  B' I( J1 Z, z% [2 k6 A
55. #define STATIC_SHIFT                3
    4 h6 y1 ]' h  y3 ~" V
56. #define TCINTEN_SHIFT               20
    7 A2 w. h6 j8 Q* x8 G$ _; M/ Y
57. #define ITCINTEN_SHIFT              21
    ( G1 R3 w7 `1 z  z* H+ ^
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    + J) w2 k0 T+ h* G' C3 T
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 |$ B4 s# ~( B0 g3 ~, x9 l
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . m# d  m+ ?! G5 l
67. 
    % T5 q5 q7 I9 h
68. dma_addr_t dmaphyssrc1 = 0;
    $ Q0 V& r! ^7 ?/ g
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - o" Q& [; w6 a" V
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    3 t: x3 I! }3 C  i- X  Q
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    " v. N' v5 N8 {( `
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    - |' W8 Q; L$ v# P, o( Z7 C) k
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
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

      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
0 a2 J0 ]+ f# t. k/ u& yarm-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。
; v# m8 H$ y  a     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 r* X0 D7 B6 J. I% x+ Z  z" R