OMAPL138如何在Linux下使用EDMA3驱动

yyj

  h: U, }/ g2 E

1. [code]EDMA sample test application
   , k  x0 _+ \, Z9 E) h) B4 a( b
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ( f0 ^* U! ~9 h/ r& k" t
8. *
     i+ m  ?4 L# J8 |4 Q
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
    ) e& \& B2 x) A/ Q% A2 R5 a& g/ }
11. *         TO CHANGE.
    . N; @! A( a% W+ ^+ `# o7 |8 G
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    8 ^; B, d4 P) E1 p! S7 I
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.
    7 n3 [- @4 n7 n- e! y& e" A. J
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , \" U/ o" |6 ?4 f- a
20. * kind, whether express or implied; without even the implied warranty
    ) E$ l5 @3 y" D9 b: Q4 p1 t
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    + N! F. H4 I; W/ S
23. */
    , m: y" o" s& v5 h1 H$ R/ ?+ l& A
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ( ]' l6 o, ~& y4 Y  U
28. #include <linux/types.h>
    % x5 A) t3 B/ [6 q% O: o$ C
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. 
      v  J1 j* I1 @4 n
36. #include <mach/memory.h>
    9 G9 f3 p+ X+ @& x3 W; P
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    % b% \1 V- E/ ]% v& w
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    % r4 j- R0 v  r* L, O) w6 V
43. 
      V% Q7 X1 O* @8 J9 a7 R. f
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    * w- y8 q  F/ {  b
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    9 ]3 N4 s) N# l/ F% v9 S$ \/ a
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    1 T+ Z. N* q& [  @( o+ B( ^
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    % n  x' r/ S# m; l! `
56. #define TCINTEN_SHIFT               20
    7 {7 K7 \& |& n6 k' X8 i) [. o
57. #define ITCINTEN_SHIFT              21
    * f& Y6 E2 e' Q
58. #define TCCHEN_SHIFT                22
    $ ~! \5 u+ I* E+ S
59. #define ITCCHEN_SHIFT               23
    + o! I4 c  w1 [& u: G8 `( U. k5 {
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - |) q5 t/ v8 v7 R4 V; U( M+ A
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " f% }& F  t' ~4 d; d: w8 j
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    0 }6 i! J* F! D$ _; p6 B& `- q
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ' w& l" N# e/ a+ F# I! j8 _
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ! V1 g; C; w  w/ D! c( l
75. char *dmabufdest1 = NULL;
    . D# c! l1 L7 f4 O
76. char *dmabufdest2 = NULL;
      y2 G7 Q/ \( M
77. 
    
78. static int acnt = 512;
    " ]( A; \% t3 X
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

; m: d( K0 l/ _: H# I' V
      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
# P2 m' V' M+ karm-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。
  |& _8 s( t" B1 S
9 N- _( n7 A* v5 h1 Y% B6 ]