OMAPL138如何在Linux下使用EDMA3驱动

yyj

! |* m2 t3 s! M. x; A

1. [code]EDMA sample test application
   1 f3 T$ i# }; L& ?7 ~: L4 q
2. /*
   
3. * edma_test.c
   
4. *
   - z* q: C4 |9 d
5. * brief  EDMA3 Test Application
   $ o0 |, d+ F5 i! f3 d; j; l) q. h
6. *
   , B) S  k  c, r* b% [- j
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - j2 n( w  x+ z8 W2 W' u
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    7 B+ x8 O$ O2 J
11. *         TO CHANGE.
    9 M7 i( |: l6 a8 C; ^0 c: i& j
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.
    
18. *
    
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.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    & O; P" J0 S2 L$ ?" E* t/ q
27. #include <linux/errno.h>
    - h' q4 b) |* m; H' S$ o% T! _6 c3 f
28. #include <linux/types.h>
    ( h7 j# _; G- k+ u4 s
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
      }7 A- f" _+ C# y
32. #include <linux/sysctl.h>
    0 p- M; r( Z$ A, g
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    7 \$ U  P4 {" F! t
35. 
    $ s* z1 [9 t: Q2 ~0 R8 ~2 @) H
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    . X" s( y1 B& [0 G, i$ y
38. #include <mach/irqs.h>
    : Q' y5 d* f! w" n
39. #include <asm/hardware/edma.h>
    9 O; `* J+ V3 }' P
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    5 @( ]' Z. _5 f, H+ N
43. 
    $ b# ]6 K3 b- z0 E+ L9 o" B4 h
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__)
    % h; E" j( J2 m/ c! O4 t
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    . f6 v' P  X5 B2 Y# E/ ^" @
51. #define DMA_FN_OUT
    4 Y9 `3 Z% G; e7 r8 J
52. #endif
    
53. 
    ) ^* D2 A8 s' ]% A" u2 L# u1 B
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    0 v( D$ S' }) C- A$ w- T2 v2 {
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    % f8 I' U) F6 l- J0 n
58. #define TCCHEN_SHIFT                22
      Y6 l- c4 P* q, B! C2 O5 @% n" E* {
59. #define ITCCHEN_SHIFT               23
    
60. 
    ; k$ U6 Q6 S" [# f" z$ v4 y- m: ^
61. static volatile int irqraised1 = 0;
    7 R8 {8 P. A* T% p
62. static volatile int irqraised2 = 0;
    8 t- w% o2 d' B8 A0 h
63. 
    
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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    & o4 I9 n0 b/ Y- f
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    5 z# }% C( I: f0 [) S
76. char *dmabufdest2 = NULL;
    - ~, r. C. O) I# N4 A: B
77. 
    9 ?( r& K+ s% V+ A9 o; P5 V
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ) h, J* S, X( Z
80. static int ccnt = 8;
    
81. 
    " n  r1 K" r8 G- p/ S  j/ G% E/ a
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    4 U# d0 u! s' U7 H# M6 I
84. module_param(ccnt, int, S_IRUGO);

复制代码

) }' ?: q' P' A& j5 i7 C% I
      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
) A4 Y- z: Z7 ?# f2 t  M( U0 carm-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。

8 ~4 f! o8 v, E- r3 Q8 t( r* I
# I$ k# l8 ~' P) y% h5 ~