OMAPL138如何在Linux下使用EDMA3驱动

yyj

! ~, ~9 {$ d" C, t. K

1. [code]EDMA sample test application
   8 l/ H4 v3 J) f4 A% Z* D% i9 q+ v% o
2. /*
   8 I; W9 U- |& M8 r$ x9 ]
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   # C# R) p3 \) q
6. *
   
7. *   This file contains EDMA3 Test code.
   ' G# X- S( `8 [/ d4 l2 Z+ k
8. *
   8 r; _$ T. g* X
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   : a* u( a3 B! o, w" ?0 z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    $ m$ q% k( m: g' D/ G+ [' h5 m
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. *
    8 e% |; M+ `/ w) q7 N
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    9 m: m) V- P0 o; }8 T- c8 _
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    $ A1 b, z: I- m' j$ i) z* y' o
23. */
    4 C1 D# V4 j, N
24. 
    
25. #include <linux/module.h>
    , ^+ ]" V5 `9 {! z$ i
26. #include <linux/init.h>
    7 W8 j5 t5 F' {" o
27. #include <linux/errno.h>
    - U6 C2 X1 r8 E! X
28. #include <linux/types.h>
    5 Q+ H' ]; A( F0 l
29. #include <linux/interrupt.h>
    ! X7 c1 Z- e. p7 @, H% a
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    - T5 v' c1 C: a9 O. J9 a( j
34. #include <linux/dma-mapping.h>
    
35. 
      K1 `9 w  w# a3 z2 Q2 J: P
36. #include <mach/memory.h>
      S) N: |8 a) G. T8 Y
37. #include <mach/hardware.h>
      t& T# B: V7 N7 x
38. #include <mach/irqs.h>
    * h( L2 N6 Z  \* Z7 |
39. #include <asm/hardware/edma.h>
    
40. 
    # d: I- i+ f' y6 s
41. #undef EDMA3_DEBUG
    6 O7 W9 |. e0 G
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    8 }& {& l) p' X. {7 g8 f/ L
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    / I) Y0 K6 ?3 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
    5 ~' {% b5 e' Y& U+ D1 e
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " @5 T# L- q- ^+ t9 W8 |
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    * ^' G0 W9 i; R$ t' @
58. #define TCCHEN_SHIFT                22
    + K1 Y+ G# r* e% _, Z% X
59. #define ITCCHEN_SHIFT               23
    $ P! R% S: a: t4 ?5 M7 y' c; U$ v
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ; w) r  ?: L) n( M' I3 X
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 q6 z& x: B, D+ u
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;
    9 G5 T3 a4 C' N
71. dma_addr_t dmaphysdest2 = 0;
    6 i( J6 {0 l( A# p# V% P5 V- v
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ; o: G3 e. p: q4 ~; W
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    9 M1 ^6 X- ^8 `" n! X* z* ?
77. 
    
78. static int acnt = 512;
    0 u, A2 T) d9 T  _* X) F4 J
79. static int bcnt = 8;
    / ?+ p2 I5 T9 }* K: \
80. static int ccnt = 8;
    
81. 
    4 L. l2 q7 }) u' S! M1 L
82. module_param(acnt, int, S_IRUGO);
    1 d3 T1 D( |+ B# B
83. module_param(bcnt, int, S_IRUGO);
    5 u* ]" s" Q2 A& B8 ~
84. module_param(ccnt, int, S_IRUGO);

复制代码

& p: S# h5 i- M      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
. G3 L1 P' q4 u* O  E8 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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

% K" @, @% v2 [. X) g+ e