OMAPL138如何在Linux下使用EDMA3驱动

yyj

6 Y+ f# t4 _% V& D& {

1. [code]EDMA sample test application
   / Q( N1 [, _( m$ t3 n6 S" A
2. /*
   3 H$ w! g& A7 i
3. * edma_test.c
   + \; H$ X% K2 A! ^& H/ ^
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
     p, C! X; d6 H4 L8 r8 k, M
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.
    5 H+ `7 B( }# N3 L
12. *
    0 W- Q! [2 _5 O- v
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.
    & W7 b; ]6 B1 f$ \
18. *
    6 ^9 i2 P% O0 d$ p! B- S/ M; e5 X
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + n7 I+ G2 v7 {3 J/ b
20. * kind, whether express or implied; without even the implied warranty
    9 n6 h4 q% G  R- {0 Y
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>
    . ]. I3 A- E) {0 H
26. #include <linux/init.h>
    ( C- x$ W3 x) k9 x4 l( j' u
27. #include <linux/errno.h>
    1 o1 b2 k! j# b! c0 X4 A
28. #include <linux/types.h>
      n7 A! m+ x; B' t
29. #include <linux/interrupt.h>
    - N6 h: z0 x: W. s2 m. l) p; x- G1 j
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    + u" u8 i6 a& A$ n
34. #include <linux/dma-mapping.h>
    
35. 
    # K* s* K; ?% T4 n3 j/ ?' o, i- z
36. #include <mach/memory.h>
    % X! m, K" c" d) k# E3 Z' ]6 q
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    " \+ p1 Y2 v) L$ B
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    . s" i3 }* Z. h
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( u: J: ~% o- h& S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    + R8 {' ~" f- A1 [0 z. g4 ?
50. #define DMA_FN_IN
    ( A# g8 E* ~5 d6 T6 I: Y* X# {
51. #define DMA_FN_OUT
    ) n5 p. {: M; W  y5 p; B
52. #endif
    
53. 
    8 t0 Y8 L# k  N( T' k+ Q# z! f
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / ?7 Y; _8 h: ]; i% j' U  J
55. #define STATIC_SHIFT                3
    " i- ]7 m/ P8 \
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    " T9 N- K2 ]1 `
58. #define TCCHEN_SHIFT                22
    8 ?' J1 m5 A$ U* z  [7 z
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / [; j) ~; V- V% K
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - X3 C0 G1 A( P( ~5 k  g
67. 
    - Q. K. \: J9 H% @: B. u4 ~3 X7 ]
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ; k1 e- E; i2 m- C! T* X
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    3 \; h/ w9 o+ ~
75. char *dmabufdest1 = NULL;
    : o0 \. A' s/ j5 }2 ?4 u- p
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    / P# D/ G2 N. Y  d
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    & @9 U" u" x  q$ K
81. 
    
82. module_param(acnt, int, S_IRUGO);
    # [( `0 R. [5 K$ y
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

: e4 o/ w" j' V, L4 L3 U# n- B- 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
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。