OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   ) c: V( O* a: A3 y/ k
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ) P% t) _* R. D- y9 n& X- F
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - Z: d7 D' |# `$ j8 O3 I+ [
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ) M0 o2 R* N8 e
11. *         TO CHANGE.
    
12. *
    : b0 e; V! @" Q2 i! L% t+ z
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    9 ~* I" k4 n2 L/ M& T
14. *
    , t" O- h  d0 Z, v8 e
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
    7 w3 d1 u) E& b+ v/ O
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
    
22. * GNU General Public License for more details.
    
23. */
    : f+ m; [) O' O: Z9 n. c9 D0 I
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ( V0 E7 l! C0 c9 l2 m
27. #include <linux/errno.h>
    % \$ t  q$ H3 f) z) m
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    3 n" Z/ n  m# E  J! @' [( B1 \
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - z" G, C; Z4 V3 [$ @# U4 Z- M7 U( P
33. #include <linux/mm.h>
    6 }4 T7 ?9 ^# w% ?4 @
34. #include <linux/dma-mapping.h>
    . {& V5 `/ _3 z& J
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    0 e# m. N  b- ^4 a  A. z' _
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    2 b3 N1 }6 Q( o8 ]
40. 
    . P% S' R0 J: F0 Z" _# t
41. #undef EDMA3_DEBUG
    9 b0 v9 c# z. C; \& D, F
42. /*#define EDMA3_DEBUG*/
    ( ~. V7 h7 Y+ G2 l# D' k7 ^9 [
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    # N- q3 t1 R/ h7 t( T% W! D4 }
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ! W3 M5 h6 K4 G- ]( G/ B) }
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ( n; J& t9 J4 {9 c5 O! e1 W
48. #else
    ! Z3 m- H1 W* z8 d' {; T1 j3 K4 }
49. #define DMA_PRINTK( x... )
      u8 R3 C' q# b  I! X
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    - y( Q& C$ X" p5 [5 `% `3 `
52. #endif
    8 ~/ V$ A# H! {4 g7 t4 A4 q
53. 
    0 i' Y& i. c7 y) {
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    4 d1 r2 h1 V" }/ L: M$ U9 U# R; S
55. #define STATIC_SHIFT                3
    5 y9 d5 u* L! r5 j- G% ]0 D0 C
56. #define TCINTEN_SHIFT               20
    $ Y/ a  R& r$ {4 I8 Z7 d
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    ) W5 p# {1 e8 H% @
62. static volatile int irqraised2 = 0;
    ; ^6 }, }( L7 {: }
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ i8 z& p: g  G5 q- v1 g  x( R* Z
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 ]% w9 v  [' f: G8 X! [
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    1 W1 z! k- t5 h; T; G
70. dma_addr_t dmaphysdest1 = 0;
    ) B& K1 D  v# ]) R; X, K: J: {
71. dma_addr_t dmaphysdest2 = 0;
    , M% ^1 e* C8 A
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ) T  G6 e) o; ?! F
76. char *dmabufdest2 = NULL;
    5 D0 `, X5 ^5 Z( T
77. 
    
78. static int acnt = 512;
    % R. E' S: }% d9 u
79. static int bcnt = 8;
    ! z$ g3 m1 k: U9 d
80. static int ccnt = 8;
    * s0 O0 w# Q3 b$ b
81. 
    # J% W, R5 @7 a4 w, `
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    / x* O9 b! t& C2 v
84. module_param(ccnt, int, S_IRUGO);

复制代码

+ k7 L+ w3 {1 H: Y! l      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
4 m2 Y* Z9 K) narm-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。
  g4 Z) q7 \8 N3 @! i4 V5 M) 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。
! d: L& W; t1 _; [+ q+ y" z