OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   ) s4 Z7 `" D; r' o$ m
3. * edma_test.c
   ; W1 z9 }! L7 j  t2 K( B/ a
4. *
   ! q0 }( B0 d! ]4 {+ J. B. \
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
   8 ?' w- t1 K6 w: W/ W
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ; C3 t3 D0 L" A6 h
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
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
    
17. * published by the Free Software Foundation version 2.
    7 i1 ?- x* X. Z0 V
18. *
    . D3 W% R; x8 l, i5 d6 L5 k0 Z- z
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , n1 {) D" J/ \( |; ~; H0 N* H
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    3 U( m( I1 D8 N1 |3 _% y3 E$ M  w$ g
22. * GNU General Public License for more details.
    : @0 u: y7 t- O1 V7 Q& @' J4 q
23. */
    4 f% B% G. N. K) x
24. 
    
25. #include <linux/module.h>
    ' _4 Z" i  q( P7 R/ |- ]
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    7 S, l7 ?) r  H6 P4 l' u+ v
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    : w0 ^, K5 ?( I" s3 X) m
33. #include <linux/mm.h>
    : s( q$ @% J! F& d
34. #include <linux/dma-mapping.h>
    6 e# V% c- g& s
35. 
    
36. #include <mach/memory.h>
    % m3 Y+ ~+ g6 ^6 S/ c# i  g
37. #include <mach/hardware.h>
    . Q9 i2 N; `' O2 L0 s& t0 ]
38. #include <mach/irqs.h>
      B  B0 Q; }) F& E. V7 B" W
39. #include <asm/hardware/edma.h>
    ; Z" V! y& h& B
40. 
    * J5 F; Y: w0 R3 y  e
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ; ?1 P1 q4 A- S4 V1 D; x
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    " p; n, y+ C9 O6 C, G
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 r* o6 ?6 k; W% i
52. #endif
    4 e2 F7 B3 o( o) T+ `
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    * a0 f! h! U& v2 G( @3 F' E& g' v/ M
56. #define TCINTEN_SHIFT               20
    . m9 z* D* C4 d% k6 x# M
57. #define ITCINTEN_SHIFT              21
    ! \: P0 w4 a. {; a
58. #define TCCHEN_SHIFT                22
    . E" F0 J9 C' C
59. #define ITCCHEN_SHIFT               23
    ; `, a) ]) ~, z) s1 k
60. 
    
61. static volatile int irqraised1 = 0;
    $ H9 H8 _* g; c0 A% b$ y
62. static volatile int irqraised2 = 0;
    
63. 
    , {; z8 q- w. o( S; ]
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) ^& m+ F2 s6 Z- u0 r
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ) }: v9 E" ?; r7 z- L
69. dma_addr_t dmaphyssrc2 = 0;
    4 L8 ]/ U* M9 I+ t4 M) X
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    3 H$ _4 c7 \6 C# Q8 k/ a
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ; z% r6 C. d( a$ t. Z0 j
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    + v  N! J$ n; O! l9 y- k! t
77. 
    
78. static int acnt = 512;
    6 e; l& ~4 G8 m2 w# t6 f' }
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    : A* S* b& k! E- @& ^$ T8 ]5 e+ `
82. module_param(acnt, int, S_IRUGO);
    ( R$ h3 Q: M" f+ |5 \
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

3 Y% n2 E) f5 G7 [3 B8 \
      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。
& l  i$ Y  Q" @1 |0 n: v5 k( P     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
: S/ j$ ]6 N: T; M& Z* H. ]
& L3 v; d- D; B" W2 j/ r1 P1 T" @& j
% O5 _' ?8 x" {6 }