OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ t5 }  b1 Q5 s1 w6 {# X

1. [code]EDMA sample test application
   , b+ ?3 m; {$ V. I% m* M
2. /*
   
3. * edma_test.c
   
4. *
   0 S7 D+ Q6 Z& b& }  i0 F  |
5. * brief  EDMA3 Test Application
   
6. *
   9 v6 o& i" B& t! W; A
7. *   This file contains EDMA3 Test code.
   
8. *
   " i; Q0 r5 J  f5 H5 j8 z$ |/ ?7 B
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ; @/ B3 v* n$ l+ |7 n
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    ; L. i' p# `& D2 ?* K5 ^+ L
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      f6 o. l5 s' X; e3 R8 ^5 d" P$ C
14. *
    % B' O% b, D; _# ?1 F' [
15. * This program is free software; you can redistribute it and/or
    # [. @1 O) ^. D& R( ~7 {- p" y: M
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
    * W- B/ g, K0 S8 U' u% {2 p; g( N. n
22. * GNU General Public License for more details.
    
23. */
    * F2 l; J/ R3 \5 X. W0 G
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    8 R  i; ], @" T5 W8 h
27. #include <linux/errno.h>
    " u( z9 t$ f; s& M9 j- {
28. #include <linux/types.h>
    + Y" q, F: }. P5 l. ]7 l
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    7 o/ Y; r3 [$ ?" k: i2 s! l
31. #include <linux/moduleparam.h>
    ' f$ q0 X; C$ w' H2 P
32. #include <linux/sysctl.h>
    - `4 L2 h" |  i$ {
33. #include <linux/mm.h>
    3 N( F# d+ Q+ c) x1 I" y8 ]4 N
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    1 ~% |, M- _! M( U0 V& r1 |
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    8 q- o3 |* U4 L$ a- Z5 r
41. #undef EDMA3_DEBUG
    # `: g  o: T4 l5 g2 t
42. /*#define EDMA3_DEBUG*/
    
43. 
    ! r9 n8 u2 G# p- p; c0 r5 Q
44. #ifdef EDMA3_DEBUG
    0 W" ~4 o9 \9 A. b
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    . X: M" a+ |1 i  [: ]6 i; ~
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    7 w8 o4 S7 T* _" @4 v2 l
49. #define DMA_PRINTK( x... )
    ; A* ]7 j0 K( x. W
50. #define DMA_FN_IN
    3 |& Y" T. x4 r
51. #define DMA_FN_OUT
    0 s/ X9 W6 ^6 ~
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    3 n4 Q- n- c! o7 b! u. P7 @; ]
56. #define TCINTEN_SHIFT               20
    - x% m8 x$ A" M; ?8 u2 b, S
57. #define ITCINTEN_SHIFT              21
    " R: b. Y$ V8 _# \4 V' ]
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    6 e' C2 G" |2 J5 U
60. 
    5 r: [6 ^6 }  v+ S# q
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % |7 x. N  d$ o' l+ }% l$ ~+ J
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : P: F$ g3 Z) E& V5 f1 F
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    9 u) ^0 B3 H- x, i. A
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    # {$ G5 t% R0 G) ?% q$ p/ v9 M
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    & p+ Y. y5 i# \
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    : s( {5 q/ O7 m1 E3 m
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    " ^5 r- F' Z7 P- G* L& t5 q
81. 
    + E7 j5 s/ k% v3 V3 D8 e6 D
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

1 P  w. }6 C+ t+ @9 L. P0 Q      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
0 x0 a$ p2 f$ X* @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。
0 g2 o8 m+ Z3 p& U+ j: ~     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
7 P( D* a* a0 t8 \9 M" Q
/ d( S# I/ h2 Q
9 \" v2 g% L' b: R. w" C