OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   - Q) D1 [* w8 b+ t0 [
2. /*
   
3. * edma_test.c
   6 t2 t6 x) X9 x: m( T
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ! l1 U. A2 j; H  z/ ?' Y: O9 ]
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
    $ L5 i( z  y' S( w. U+ v
11. *         TO CHANGE.
    
12. *
    # [: z  V1 e, D# x, f' l
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    7 O5 M! u( h# G6 X) t: O* S
14. *
    8 z( p% a' c, s9 o  e' _: |
15. * This program is free software; you can redistribute it and/or
      o2 ~4 n9 ]( `( G3 e# ]6 I
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    1 h/ H' h; m) Q
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ; Z4 b- G2 O2 K, J
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    1 q3 d  p$ ~" g1 x
23. */
    
24. 
    : c$ j9 M* J5 l( K* w* Y
25. #include <linux/module.h>
    8 m$ Y' _6 S; G" a4 Y* y: ~5 |+ ?5 b' }
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ' \  y+ l2 r  d
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    * R; ?! m7 \5 }
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    0 C: e" m* z+ A, y1 A
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    # `8 d9 M* O, |
42. /*#define EDMA3_DEBUG*/
    & V& ]; a6 R: V' @* H% I
43. 
    $ ~  g& t6 `7 r  H! j6 m% R' x
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / ^9 P* H. @  w$ S, o
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
    7 C* F0 x$ Y- M; _; [  B
49. #define DMA_PRINTK( x... )
    3 C5 Z$ B) U8 P2 i3 O2 t; M# R
50. #define DMA_FN_IN
    ! O. J  L1 R" E4 N
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    + ?0 ?5 i) x* ~
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    / B8 V- w6 a, e
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    6 w9 w1 u: Q$ t3 R8 b/ x7 x  X
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * N0 T2 P& w; m  A& N" J
67. 
    / G6 q+ Q7 z, t6 n+ {! u
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    - D2 U) b1 U6 ?$ s
72. 
    ) Y* w$ h' I. A9 ]; _
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    * P& e- G6 A. l1 H
75. char *dmabufdest1 = NULL;
    . j% m" r4 U' K+ `
76. char *dmabufdest2 = NULL;
    
77. 
    4 L9 \! _, k) Y! J
78. static int acnt = 512;
    8 v( v& U5 `9 T) i" a0 ]
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    1 \$ f# y4 i+ F5 r. t4 C% j9 k
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    # G! ?7 u1 r/ x) S5 |& S5 U' r! O
84. module_param(ccnt, int, S_IRUGO);

复制代码

' s4 w; ~# ^$ Z2 N
' ^5 f. T! d1 C% d      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
( l  I' H/ E& e( X! ^$ {* Qarm-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。
/ b0 X, S1 {6 a( 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。
$ \4 @4 h) }- w) ]
9 ^5 X' }' ~3 ?1 ^/ T3 _
, a9 z* f& N! V. O; [