OMAPL138如何在Linux下使用EDMA3驱动

yyj

  h# u0 H# Y7 T/ m

1. [code]EDMA sample test application
   
2. /*
   . K- \) v' @$ v( N8 `6 J5 p3 ~
3. * edma_test.c
   0 F; {( g9 z. Q8 ?
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   3 K( m; [: }4 W) ~
7. *   This file contains EDMA3 Test code.
   
8. *
   ) j' p9 C& v. v" N$ k- B* w* u' R8 k
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.
    # G( c: F) J$ n/ [# r& ~. k3 P" r
12. *
    # P1 J4 E2 v3 K; T3 ?. A% q  L
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    5 ]) L9 X, x6 u; g5 \& k: F& E
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
    % j) _$ U6 }+ F9 {4 o$ p
17. * published by the Free Software Foundation version 2.
    
18. *
    ' s4 n; o* E) l/ x  H( d+ S
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
    
22. * GNU General Public License for more details.
    4 v1 z) \& j( C5 V# S
23. */
    ; q# r# F+ U" H! ~/ M. G
24. 
    
25. #include <linux/module.h>
    ' l2 N% @5 ?8 ]# j. Q- h5 x; r
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>
    . X; O% M4 L' W+ o- W/ Y( {$ b
32. #include <linux/sysctl.h>
    + n, ?4 |6 z2 o0 R$ b
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    9 o6 D5 Q. b2 t5 W7 z% Z) {
35. 
    $ l2 a6 F# R5 X" _
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    + R" Q+ n& t$ M& K" X9 \. b
38. #include <mach/irqs.h>
    7 n6 c  p( D! }4 m
39. #include <asm/hardware/edma.h>
    ! k) S( r% K- n4 l
40. 
      l/ b, n' O9 r' u; ~  r
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    4 c) Q& v! l: u0 W0 \' c
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / h+ L1 \. a" u2 B6 {  H! \
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    " h- n( v0 K) C$ F
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    % r6 X5 m9 A% d$ Y' C) u
48. #else
    ) B* X# b! ?- V+ X/ L' r
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    . x# ~+ \  Q8 Y0 F
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    * }) e- V/ M- a0 b8 _" Q/ Q
56. #define TCINTEN_SHIFT               20
    - P% e% _4 ?; T0 L* j. F
57. #define ITCINTEN_SHIFT              21
    . w0 z6 s" H" q7 T
58. #define TCCHEN_SHIFT                22
    , Z3 Q" Q' z( y. ?
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ' `  L/ I9 v2 C: i: y0 x, y
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 w8 B/ h. S, r* f( A
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. 
    : c# u. M$ \* k  `6 g' v
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    5 X& O- U8 u8 A8 {& A* z
72. 
    * h5 m1 A' |+ T. e6 U+ J
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    , L" w, Y* Y) ^. E
75. char *dmabufdest1 = NULL;
    7 X- w: m6 {& p8 V0 \
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    " ^) w2 x, b6 h& E( R$ d1 t
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

8 E! Y+ m8 V* j
+ ]/ m) i) F  A# J7 t0 |* _- e      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 [5 A/ g6 V& k5 B- w# narm-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。
) S. G7 T) v4 i$ X5 {     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
5 N. d$ P8 n, j