OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   ; |+ O1 V/ h' _" y$ l
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   . m# K& E% V) X
7. *   This file contains EDMA3 Test code.
   4 v" {. z5 k& i! g/ l' j8 O: g
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.
    9 v  }, c2 H9 t; {  S  U- N
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
    % |3 s& M% K, g! G0 @
16. * modify it under the terms of the GNU General Public License as
    + w/ ]2 V& [: \8 m/ `  p/ B
17. * published by the Free Software Foundation version 2.
    
18. *
      u' q. l0 s, j9 A5 n( C
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
    ( |3 s( H7 z1 z) S: U, g  w" l
22. * GNU General Public License for more details.
    1 U4 C, L7 D/ J2 m+ A% `
23. */
    & g, B( X. m5 b6 X6 U
24. 
    
25. #include <linux/module.h>
    9 L- T, I" ], N. [
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    5 H1 N' ^0 w9 f
29. #include <linux/interrupt.h>
    ( N/ Y" b+ `6 ]# e' P- V
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    # q$ U; H* H( ?7 v( q
32. #include <linux/sysctl.h>
    3 C# ?: h( ^8 {+ a# P
33. #include <linux/mm.h>
    9 g) h2 z! z) m2 ?9 B, b  e& E; s
34. #include <linux/dma-mapping.h>
    ) L8 I) y6 G0 z
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    0 L1 {$ s  k# O: n% T
38. #include <mach/irqs.h>
    5 t' ?6 m5 {) a/ i" Y; y
39. #include <asm/hardware/edma.h>
    / l# V+ o8 z6 k4 u# P! @
40. 
    9 W% e* I& i; u1 l) ?* U% Z- j8 ^
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ; x' a8 M7 w5 E/ c; t9 _
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    # _5 H: k( `9 j0 N
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    $ b- V8 u4 D6 W) Y! F
50. #define DMA_FN_IN
    & B. F* T/ ?! Z6 W5 v  S
51. #define DMA_FN_OUT
    ! g, S; F$ ?, ^
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    . b* O8 C7 m1 n6 I2 S
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
      j) _8 ]7 W$ p. B: v1 _7 }
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; m2 B  ]5 K& p3 z" v$ ?& ]
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 M) L5 {9 E9 U6 |+ }& n9 [' D
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 m' ^; g2 ~; b9 k4 X* k
67. 
    7 J" E$ U  _( N
68. dma_addr_t dmaphyssrc1 = 0;
    * N& Y, r; m# O6 O1 [7 \* B' Y
69. dma_addr_t dmaphyssrc2 = 0;
    9 M" N- @- l4 V. J$ E+ L
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    1 M0 S! f9 }) }, X. C( j/ V
77. 
    6 K) f8 l! E" C5 O$ p: e3 r- w5 C
78. static int acnt = 512;
    
79. static int bcnt = 8;
    / p+ b2 {: t+ c: X
80. static int ccnt = 8;
    
81. 
    6 _/ B% r8 {$ V$ ?3 _& Y* W$ i8 G
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

: d, E+ ~7 j3 h2 p      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
5 O2 j( n9 \3 M" S2 R

5 k. i# ]5 [$ ]+ W; |* o