OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   & E4 \) ^8 U, s6 q
2. /*
   3 Z; N; u$ B8 {: I3 E% Z6 [
3. * edma_test.c
   0 ^2 O2 {  s; t2 f$ Y- {: e  r
4. *
   
5. * brief  EDMA3 Test Application
   & E; b( a6 {- q' s! ~1 j
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
     A6 c: R( @, ~4 t2 p2 h8 c5 }  }
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
     o) h( _) c. b. S2 Q5 d
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    - J$ V- B! N9 R3 H
11. *         TO CHANGE.
    5 x3 }. Z% h8 V4 D1 p
12. *
    " j4 u0 ]4 r$ }" n/ m
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    % L( O2 Y, m1 I8 |! R3 k4 c' Y9 w
16. * modify it under the terms of the GNU General Public License as
    ; G  a4 y  c5 L' R  @& |
17. * published by the Free Software Foundation version 2.
    ) z* Q2 w0 {* B; Q, P
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>
    5 k5 O: l6 J$ W" q
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    7 O6 M# g; ]" h$ x  p
30. #include <asm/io.h>
    . l  C' j0 `9 l: l* n1 f
31. #include <linux/moduleparam.h>
    1 d& u$ x& N+ W& F, G
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
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. 
    5 b! \: v, v9 R, ^! j4 G8 K7 R' F
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)
    7 L0 \; Y0 Z# }  v
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ( J+ a; \' u7 X* K. @; q- X
48. #else
    . V3 V9 S9 A' x; o
49. #define DMA_PRINTK( x... )
    ' W2 o- c, R3 w2 E0 w& w) g- q
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    - i. S) \$ S$ b! y: A! j3 y3 S
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    0 L, M: y* R3 l' p. @% j% N
59. #define ITCCHEN_SHIFT               23
    7 c4 G6 C1 p* |/ B8 ?5 x2 q, a
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    1 Z' _7 G+ J% j
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 Q8 A* I$ M: s* Y9 V
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;
    2 n2 E: ^! ]3 \
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    / A+ I4 G) d. u
71. dma_addr_t dmaphysdest2 = 0;
    , O8 A2 J5 D7 ?! ]
72. 
    7 h# }2 d1 L$ G+ B* ~: E3 V! ]
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    - g, v! Q6 l" @" K9 L
75. char *dmabufdest1 = NULL;
    5 W" h. J7 ~6 c' A/ k% k& U
76. char *dmabufdest2 = NULL;
    $ P$ R, Z2 m/ {9 a
77. 
    
78. static int acnt = 512;
    9 ?# }& j2 T, D9 R9 U9 F" h2 P
79. static int bcnt = 8;
    6 \, s' k* m. f( `) |
80. static int ccnt = 8;
    ' `3 U5 C3 |: e
81. 
    ; ^  u# l* ?/ O+ _% ]
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

, y( h( Q" _9 ]      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
, b  d, X  A. S$ C  Uarm-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。
& r) Y4 t' Z( G: L3 R1 i     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 t0 A: A* e  u
& R! A: ]  M& w2 u& ~/ U, c