OMAPL138如何在Linux下使用EDMA3驱动

yyj

! ~: Q0 ~9 P8 h( A; `% l

1. [code]EDMA sample test application
   $ x9 u3 P+ p( q) x
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   + i$ ?0 V! O" A! X
7. *   This file contains EDMA3 Test code.
   
8. *
   * p7 p( C  X' l
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * W3 R9 r' t2 o& }- k. h
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    + A7 m. h0 h/ e9 O' O& z- Q# g
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      i8 r8 W  E& V
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
    4 D1 w' ~  v, W6 V9 Q
17. * published by the Free Software Foundation version 2.
    * A2 m/ g' {, j1 D5 {& I  R
18. *
    " q) g& L2 U& y! J8 \& }" Z3 o. T
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , s1 V3 g$ E- `9 j. v7 f' i
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    9 q+ F% j8 F9 a3 A% M
22. * GNU General Public License for more details.
    ' `2 b# H* s# ^9 p
23. */
      u7 H9 s0 g8 n( [+ ]
24. 
    % W& q" _5 @. ?' p0 k- w
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    + K) `+ m* z1 j7 s% y
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    . d( s6 k! V- J9 d9 L+ N+ _3 Y
30. #include <asm/io.h>
    0 ?# j, ~0 J' e! r+ {
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    - W' G3 l( j2 I$ X! q' e
34. #include <linux/dma-mapping.h>
    % W  @0 k6 ]; o. x  [
35. 
    " {& p$ G% o: U2 [$ H8 }) x
36. #include <mach/memory.h>
    ! a" j- p% \! X0 {. I9 k# }
37. #include <mach/hardware.h>
    5 _/ E6 |0 N6 S7 G( ]0 D# o
38. #include <mach/irqs.h>
    # Z% |& u0 [  u: T' g
39. #include <asm/hardware/edma.h>
    6 t0 ]$ P  z' D+ k
40. 
    
41. #undef EDMA3_DEBUG
    3 H, @8 ^7 t: S
42. /*#define EDMA3_DEBUG*/
    ) R- Y7 d: g# F$ E; P, v  t4 L& U
43. 
    ; r9 L7 j, M. H. |0 A! U
44. #ifdef EDMA3_DEBUG
    ' v% ?, e, _. C4 c
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( t0 c7 R5 [' \( t% b- K: C4 ?
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ! Q. I0 x! F* `- Q6 c. X! b/ }& A
48. #else
    
49. #define DMA_PRINTK( x... )
    % C) T. B1 w8 `* C4 L5 q# A
50. #define DMA_FN_IN
    1 Z, S# ~- c5 B) \
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / T  C8 Y. E, p* Q7 P  S
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    . m1 p- `6 R# [" O1 r
57. #define ITCINTEN_SHIFT              21
    5 y* q! V! w+ \! f
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    $ L9 Z0 `7 }' r3 n: I$ h
61. static volatile int irqraised1 = 0;
    7 c. H- h6 _9 |9 g& o7 X
62. static volatile int irqraised2 = 0;
    
63. 
    0 G8 X) M) I/ T& g
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 ]% e: M4 d7 [- l0 X
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % r. ~" P+ h% W. ^3 M) K
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    2 a/ n& d7 t2 J' Q
68. dma_addr_t dmaphyssrc1 = 0;
    * q) ]( I+ B0 q- J2 B
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    # X$ X% K4 q5 ~8 ~) ~; ]
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    8 F8 v6 U. _* P5 H/ D- g7 c
73. char *dmabufsrc1 = NULL;
    7 F4 T# [* _% A7 K/ M( A. o. {
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    , T0 N+ h& H& d2 N. S
76. char *dmabufdest2 = NULL;
    + T2 _: p" k: C* Q  G
77. 
    7 l$ E: ^: {  B
78. static int acnt = 512;
    3 L, K  x' q0 g# h. o& j9 y
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

: V2 L% I+ 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。