OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 O* J8 B' U: T- h+ Q1 d$ ]

1. [code]EDMA sample test application
   
2. /*
   3 a- K" f- R# ~- `
3. * edma_test.c
   % s! P1 J$ K! p. {' r
4. *
   ) C- g" h1 ^* G% I. p6 _
5. * brief  EDMA3 Test Application
   ! V, B8 W1 d2 M4 T" w' ?
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    7 o3 g: ^, x  A) ^
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
    " c4 D8 F) y$ V
17. * published by the Free Software Foundation version 2.
    ! F" |- _3 k6 G/ h6 w& K' e" x$ P
18. *
    . y( J6 }( l0 ^
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    8 A( ~5 K! ^/ c& t+ y
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.
    $ B! l/ y3 ?8 o+ M0 L0 e2 h
23. */
    
24. 
    
25. #include <linux/module.h>
    6 o  [1 J; _# S4 F9 k5 v  R1 u
26. #include <linux/init.h>
    4 g% Q+ r+ ^. Y) \
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    / t* E1 e% ~# D! v
29. #include <linux/interrupt.h>
    % e' n  r* ]# q4 S+ @7 N, p: k- U& D
30. #include <asm/io.h>
    ( ?) N" D$ ^% h" }
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    2 q+ U' C, ~( X) d9 B, @6 d
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    3 g2 T. C5 ]+ Q+ T  b6 _( T6 u
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    1 b7 @; a1 _8 }6 r6 z
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    3 i/ k& T7 Q- M
40. 
    
41. #undef EDMA3_DEBUG
    8 U; C( C5 N9 I2 Y
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    , [9 j+ _; X. l# U
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    7 Q2 A- W8 S% i2 W3 y9 t
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
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
    
52. #endif
    
53. 
    ) Y0 I/ ?+ U, I( U: S% Y
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ( G0 ^: a6 R: R# x! |$ E
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ! q* E1 N0 E' ]1 Q- C
61. static volatile int irqraised1 = 0;
    9 \, w! z8 Q% f) g* N
62. static volatile int irqraised2 = 0;
    
63. 
    ) B( i: w" \+ x
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) f  c# \6 ]% `
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " X# X/ u! k7 P8 j, J+ t: I; S
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;
    + W4 H( o* _0 v
69. dma_addr_t dmaphyssrc2 = 0;
    . A* B+ g0 z6 I; O- l
70. dma_addr_t dmaphysdest1 = 0;
    ) g* @& y1 O& [
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    7 |' }: x0 B7 _
75. char *dmabufdest1 = NULL;
    8 [* e" Y/ ^) @; t& e
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    ( ]2 S$ T* T/ {9 r  v( b& M- V# c
79. static int bcnt = 8;
    , s6 G( }% u0 w* h
80. static int ccnt = 8;
    3 [1 I. _0 {3 V0 w2 L* y8 w( i
81. 
    0 [8 b0 Q* |8 y/ {' U7 y) o
82. module_param(acnt, int, S_IRUGO);
    - Q7 ^2 M+ p9 b0 S) G
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

( b& Y7 E4 T: f
      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
/ X3 x$ D$ x! I5 @  x& earm-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。