OMAPL138如何在Linux下使用EDMA3驱动

yyj

- r) x0 Y" @3 ~8 w0 a: ?

1. [code]EDMA sample test application
   
2. /*
   2 h; n# q* F! ]# G4 M- D
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
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.
    / M- N$ J- ^) H0 z
12. *
    - h9 }9 W! g+ ^
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    8 g4 S! v6 G/ w4 f" H. [
15. * This program is free software; you can redistribute it and/or
    ; l3 |% h0 j* f( N" p* Q* \% v5 c! Y  k
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ! x7 z1 E% ]' S
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; D9 Y6 a  S# F
20. * kind, whether express or implied; without even the implied warranty
    % \# l2 o0 ?# a! b: a5 T) K; f
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    # T. P+ g$ y+ L$ m! p! G. c; B
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    ' Y7 n/ r# G0 Z# f
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
      D8 u; @$ T: r" N# B* B& t
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    * |5 f' [0 v* T7 O6 C  z
30. #include <asm/io.h>
    & D/ r5 ^/ v8 {
31. #include <linux/moduleparam.h>
    3 v* W4 `+ E! F9 P
32. #include <linux/sysctl.h>
    ' y+ p' A; B  g/ t, d* J
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    , d2 J7 K/ Y# Y; J2 B+ B7 @
35. 
    
36. #include <mach/memory.h>
    6 O8 R' L- p6 k
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    0 R/ ?0 ]5 d$ N: }
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    & J% R: U& |$ A( Z
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    * ^: T( |8 E( n* I; y+ v
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
    0 w$ M7 x; V# z; b9 m* J% @& u
49. #define DMA_PRINTK( x... )
    ) B# I, W8 Q. k0 u% }
50. #define DMA_FN_IN
    - D0 Q7 Y8 E% K6 l! ^. g
51. #define DMA_FN_OUT
    
52. #endif
    * W0 C6 F; r# q
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    - t1 L# h( ?. `9 p+ @8 }. \4 c
59. #define ITCCHEN_SHIFT               23
    2 v# }. ~5 D! ^" G# `0 t8 e/ O
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);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 v1 K  Z9 y' p: o! H  s4 L0 b
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;
    % T* T1 S  v6 h7 f1 t2 e
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ' A! Q/ G, ^0 n0 q! A
74. char *dmabufsrc2 = NULL;
    . o2 @9 M9 l  O+ W
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    * y$ L( E- f5 j2 e
77. 
    + `9 y% H  C1 U8 F% U/ S$ a. E$ S
78. static int acnt = 512;
    
79. static int bcnt = 8;
    8 C) ~! B5 E* E, r/ w8 m3 j" q2 l
80. static int ccnt = 8;
    3 b- x( N! F0 w
81. 
    ! I1 Q# u3 l# z& Z. }& Q+ s$ O
82. module_param(acnt, int, S_IRUGO);
    8 K) H7 }0 U' }& ^
83. module_param(bcnt, int, S_IRUGO);
    # ?  e7 Q+ b* H* E" {0 K$ ~
84. module_param(ccnt, int, S_IRUGO);

复制代码

- M, L. [7 ~4 m0 q+ U3 W$ o      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
arm-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。