OMAPL138如何在Linux下使用EDMA3驱动

yyj

  {3 x) V; W4 ]6 M- c8 y" C% B& M

1. [code]EDMA sample test application
   
2. /*
   5 P$ ^9 I) e( J9 \" J$ b; }2 ?# ~
3. * edma_test.c
   2 o' f, Y( h$ J2 A9 y
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   0 f$ s. B( O4 S0 ?/ z: E# N
8. *
   
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. *
    6 x2 f+ c1 T& }5 L! Q
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    * O7 z$ j: r$ v& f. c3 o
14. *
    - e9 J/ ^: v% `( A3 m6 i! x
15. * This program is free software; you can redistribute it and/or
    0 U/ O2 X( D! X" l* n/ _7 M4 P# e
16. * modify it under the terms of the GNU General Public License as
      J1 q+ ?; s& J" d
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    % W5 @# J6 i$ ~0 Y7 D9 ]
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    5 L! ]+ E% ~: k: I( M6 K
22. * GNU General Public License for more details.
      b+ ?& [% t5 G  V' U# Q0 H8 |
23. */
    . i+ A8 i: f+ O. r4 H; E7 }
24. 
    1 s) v7 o$ q( f8 o* w
25. #include <linux/module.h>
    0 t( U, o0 t5 l! q1 d! y+ u& Z
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>
    9 T0 G+ R% f- {  c* D
31. #include <linux/moduleparam.h>
    6 b# F# T6 ~6 _/ R
32. #include <linux/sysctl.h>
      |0 X; K. s, B/ \% @* a: d
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    * W4 X9 \0 l: W
35. 
    
36. #include <mach/memory.h>
    7 q! X! z" y8 q6 u1 K; d
37. #include <mach/hardware.h>
    * N  ^6 g- E  p/ p3 F9 G) `7 T
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    , y$ j$ p/ N7 ^- \6 x6 K
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    ) y+ b; d5 z: T/ l9 w* W: [1 |6 k
44. #ifdef EDMA3_DEBUG
    ) k/ @$ {4 b5 I) U' `" P
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
    2 o/ ]$ t* e" f' C5 }
49. #define DMA_PRINTK( x... )
    " c4 `% `5 }7 K6 U9 B; N
50. #define DMA_FN_IN
    , _/ p" w0 I  R( K$ F) Z
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ! E8 K2 w9 [( [) `/ M
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " A0 F- J# b# c! @) f$ S2 O
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
    ! x% t' h; B  x/ s. n
60. 
    
61. static volatile int irqraised1 = 0;
    . ~* A+ z+ a0 ~" b6 |+ h
62. static volatile int irqraised2 = 0;
      |( V4 q: `9 Z8 H3 o# j" ^
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # G: P7 P# {9 i5 i9 M
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);
    " n2 v1 ?+ R  L) Y
67. 
    : Y: n4 c# }& k
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    & o# Y+ E5 `8 ?* p' q0 e" c
71. dma_addr_t dmaphysdest2 = 0;
    ! q, N2 {0 g1 \" V* z
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
      d: c; o, ]5 k9 ]/ J* N3 ^/ G
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    0 o5 P  S( Z8 i: s5 K/ d
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

! i- g3 I( n8 @4 @, s
      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
- M# ?% I! ~+ c: r- D$ marm-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。

, z$ ?. v' B; E- q7 m  c! z* l