OMAPL138如何在Linux下使用EDMA3驱动

yyj

% g& S3 X; W- j) ~- C

1. [code]EDMA sample test application
   
2. /*
   / ~! E0 e& p6 V# x" L
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   3 V( m" s2 Z- A  s6 j3 ]
7. *   This file contains EDMA3 Test code.
   ; Y* {4 M$ z* D0 }' w8 [& {5 m0 H
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. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    5 I. `! i7 s5 v1 B0 |* v" r3 z+ }7 a- E
14. *
      k) G7 W6 s* H# a; E6 U7 |
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
      O! |1 G0 q1 ^8 L- \( U4 V- l
17. * published by the Free Software Foundation version 2.
    ( m* P$ H5 W1 b6 q
18. *
    - p3 `" \# u+ b( R( R& |4 l
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.
    9 C! W2 f! N6 E( y
23. */
    % U( ?5 s3 N5 m  W/ J" C
24. 
    1 ]4 Q1 G2 H. H8 P- C
25. #include <linux/module.h>
    4 f, x. _/ m: p
26. #include <linux/init.h>
    + K. V9 f3 i5 q
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    9 g) d/ W- H+ o$ S* N' G" q
29. #include <linux/interrupt.h>
    8 T. L" F% p$ V3 u, f; H
30. #include <asm/io.h>
    0 e! j6 |* Z+ ?* }, d2 Q& B
31. #include <linux/moduleparam.h>
    9 P2 b0 j& O- c3 a# @/ F. n
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    2 d; e5 g0 \$ I" {1 [  z, a5 Z
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    1 ~4 _" }( b" k% ~; O
39. #include <asm/hardware/edma.h>
    , ^: _# ]4 Z6 s% x% X
40. 
      x( ^' T5 Z2 u% B" e
41. #undef EDMA3_DEBUG
    3 U, x  Q$ f. E% A; `5 x
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    + [' k' o5 _' n2 o9 n
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ) Y$ k4 j* F3 s& H0 Q
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    6 W. V- X# L8 }1 p/ }9 j* ~
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 g$ O% ?9 W  ~5 F1 K- `+ e/ S
52. #endif
    " L! y; J" c  A/ r4 y) ?  U
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    8 S" ~# h; l+ Q- @2 }, r0 |& h3 S
55. #define STATIC_SHIFT                3
    & k6 l; N7 f9 x" X: C9 x
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    / G, U- i1 T4 |  |; y0 f$ V) k
59. #define ITCCHEN_SHIFT               23
    $ A0 u) r6 X' L7 w
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    0 w) d; s9 u+ \2 w; u' `5 s9 W0 z$ K2 M
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & O0 x2 t7 M& r1 c5 H3 h  x5 C
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);
    ) E  L. ~1 h( w+ |
67. 
    8 W1 n" d2 X& {' E; f# ~" D; f
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    0 S+ t' D2 U, D8 t3 V; q6 U
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    + b: q4 w9 ~4 y
73. char *dmabufsrc1 = NULL;
    9 }  H! M4 u7 ?* d* C- a
74. char *dmabufsrc2 = NULL;
    ! @4 k- r2 o" t* g4 d
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    9 b8 r3 x4 C5 w! _
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    7 W) c" V1 O% }
81. 
    + {' V$ \! N/ E6 `
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

      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
4 x6 Z1 \# k5 C5 @' h+ sarm-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。
; t, H  r0 o# H
  ~! d8 o* l0 C
2 L* B( ~# ?- f+ |' k6 q7 N' w