OMAPL138如何在Linux下使用EDMA3驱动

yyj

; \% I) |  f1 c5 `) d# O( v# s

1. [code]EDMA sample test application
   
2. /*
   " J, {! I! U0 a& `: g5 w
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ) E0 Q7 J& q; l9 Y
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ p- ^2 C4 `: q; e/ T6 |
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    " t5 ?+ V% z6 {7 G5 _- n
11. *         TO CHANGE.
    ; X* i* r- n3 a1 ^5 ]- c# I
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
    - J/ w5 v  Q. [5 \1 U$ |
17. * published by the Free Software Foundation version 2.
    / l& e( y1 x( b. q: z; ]' ?; B
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    & U, ]+ z1 [; I1 E9 }$ I( R: B
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! v; ^: T% S0 q  s  c
22. * GNU General Public License for more details.
    , I4 R8 d4 o- C: ~0 }/ j/ V
23. */
    1 @) t3 O  z0 z. d* X; G4 R
24. 
    7 S2 s& A' x0 Q2 |/ r
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    " t" k2 p# V7 B0 @* F
27. #include <linux/errno.h>
    " K3 m+ ]+ t4 F# e4 d
28. #include <linux/types.h>
    ; ^- Y' ^! k- ^7 S8 C3 }
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    9 J& A/ O6 f; a& z
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    : m; q# a2 T) j6 A6 B
33. #include <linux/mm.h>
    6 Q# b! r. i8 E: Y- o% P( Y& s( y
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    1 }* v* Y- u9 \2 Q6 y. O
44. #ifdef EDMA3_DEBUG
    6 Q- I  t/ }& t8 |* k# ^
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    $ J2 q3 T* d9 M5 m! s" ]+ m
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    : N* q1 X- c" G3 ]1 D% J- _
48. #else
    - M" S$ I! Z$ v, {* b
49. #define DMA_PRINTK( x... )
    . f- {) _1 t3 l8 W6 z" h4 q( K
50. #define DMA_FN_IN
    * g% O( I( J; ]" ]  l& u
51. #define DMA_FN_OUT
    ' N9 u; |; f6 k! i' o/ V
52. #endif
    
53. 
    & |  q& p" |) i% c/ h
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    0 f* @+ o, Q( F: s% ]* k
57. #define ITCINTEN_SHIFT              21
    ) f+ ~1 l  J8 I
58. #define TCCHEN_SHIFT                22
    + I; H; B0 w0 T7 D3 y
59. #define ITCCHEN_SHIFT               23
    ! T' s& d$ y& K" O8 ~: x
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ! C3 a: ^( |- }; _2 u) y3 g
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);
    
67. 
    . O6 ^1 M" T7 H" O. I, `# K% y' _2 \
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    , W$ E* Y: t' j4 D* i( q
73. char *dmabufsrc1 = NULL;
    ' e# }) d" f; r2 o5 S  g* o
74. char *dmabufsrc2 = NULL;
    & ~$ Y' h+ P1 p: n4 X- }4 u/ u
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    % ]  ]3 k. W& a; u/ A3 w
78. static int acnt = 512;
    4 V  O: B: M; G' i. V
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    3 L2 n' \" I5 g. F
81. 
    $ K, @# Y  q% ?1 i$ W& u
82. module_param(acnt, int, S_IRUGO);
    - F. `9 ^; z% U7 [4 k* l$ i
83. module_param(bcnt, int, S_IRUGO);
    7 I) @% g0 M9 Z
84. module_param(ccnt, int, S_IRUGO);

复制代码

  o, Y6 c2 Q3 {. R7 \2 }2 R5 t4 {
      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
: k% W. p' y: {8 r. {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。
9 i( r- _1 a' a  @  P# k( F     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
% j7 j* A4 v# p; u) c
+ l, l! x) D0 N1 m+ K