OMAPL138如何在Linux下使用EDMA3驱动

yyj

- N- s3 _$ C) G( t3 Y

1. [code]EDMA sample test application
   5 s; S$ U- w8 J/ R3 ?1 \
2. /*
   
3. * edma_test.c
   2 ^# R4 }' T! |# c
4. *
   
5. * brief  EDMA3 Test Application
     j) X8 v7 C8 P0 y. i. y! w
6. *
   
7. *   This file contains EDMA3 Test code.
   . x+ C, u5 Y% R, r( R" Q& E
8. *
   . J9 X2 B3 O  M7 r( ~! e( R; y
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 Z2 C  H! ~7 h# o9 O1 [9 q. `6 t" L
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    9 k; h; y" u& h1 c0 v& V1 N
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    1 v9 h! q% D2 z$ z
14. *
    
15. * This program is free software; you can redistribute it and/or
    9 }# J1 }. p. Y9 d6 R, A' Y
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    3 }; J- A# }* S, J1 Y
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    0 r8 Y, N. ]$ i. w3 [* A
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    6 w2 Z4 L  Y( Y; o) w5 a8 B
23. */
    3 ]& i& u, ~/ }  }4 }$ w
24. 
    8 @2 |6 i' V* L. O( B# X' B. z
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ' U. m4 E) y  t
29. #include <linux/interrupt.h>
    / g% A" V3 l# V$ ]$ K$ U2 `) r; B
30. #include <asm/io.h>
    + C6 L, @1 X0 ^+ Q5 U
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    % M4 m. L/ |6 A9 b0 ?7 L6 W
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    # U( {9 V) B) R/ a
38. #include <mach/irqs.h>
    2 c+ {% m) i) W
39. #include <asm/hardware/edma.h>
    5 c6 N. ]. H9 Z) I5 O! T/ a
40. 
    ) D' H: M# \9 X7 a" ^9 y
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    5 N6 ^9 h! r8 T  ]5 r
43. 
    / ]6 O3 i) }7 S8 P0 n% K
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    : A, i6 \- W) ?- e, P* ~3 k5 h' T
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    0 \6 H8 r- J/ H( g$ S5 m( m
49. #define DMA_PRINTK( x... )
    5 v+ d' |5 g1 O
50. #define DMA_FN_IN
    5 w* ?9 M3 l# Q6 k. l
51. #define DMA_FN_OUT
    
52. #endif
    ! z3 b( N) d3 L
53. 
    3 x& i* d/ E9 A) p
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
      Y3 O- o! O- p- X" }9 P
55. #define STATIC_SHIFT                3
    8 e: C4 }' E: y0 _7 }
56. #define TCINTEN_SHIFT               20
    $ q7 t; [; D8 @6 _6 U
57. #define ITCINTEN_SHIFT              21
    & p; i) \/ j6 e# v* J8 a
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    & J9 Z! G$ g; I' t! c
60. 
    5 h- ~+ V" W$ @4 {" p
61. static volatile int irqraised1 = 0;
    ) E0 A0 v# o% l! v6 q# J
62. static volatile int irqraised2 = 0;
    
63. 
    9 U% I; B( }6 e. r2 Q- a! s
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( d2 Z+ N7 U; E) ~. \
67. 
    ( K1 r0 w. G) z6 v
68. dma_addr_t dmaphyssrc1 = 0;
    0 q% ^  o8 q8 u+ r+ a
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    / o% s" \6 n, z1 N' J4 p
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ' d; S" s1 q) ?! ]3 C. d
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    . u+ R( |; U7 `. ]* G. z! U: g* V
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    8 Y& p7 B6 h0 ?; J$ D$ U, ], P- s
77. 
    
78. static int acnt = 512;
    ! v* F9 N! e) w$ w, o& a( n, E, G
79. static int bcnt = 8;
    & @8 Y7 ]5 y) b" I) U2 V( D
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    7 u& L; [$ i& U/ ~2 y
83. module_param(bcnt, int, S_IRUGO);
    6 [5 L2 R5 a% d
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
, P* X$ q2 R( Y: Z  i7 xarm-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。
  `6 H% S& }1 t: e