OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   6 r# }4 W( F7 a" R9 ?' B
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   2 f7 i3 T# P& B5 M8 S
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   # J* i/ e5 x+ V. Y
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - L7 X6 v% {( i$ L
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    " ^- f1 j% V$ T- u7 w, d
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
    5 N9 @' M7 f0 t9 n2 Z: c) V- y
17. * published by the Free Software Foundation version 2.
    5 Y4 {2 n) }) M! f! P% q6 g. Y
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    # {2 }9 x& z1 o1 X9 T0 \# E
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! U- p7 T4 R9 }
22. * GNU General Public License for more details.
    0 \6 M  H1 y, B; a8 H
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    3 h% p  g9 z* e/ F" U1 c: {6 I7 j
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    % k: _2 V1 Z$ N: W" }2 z
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
      r- Q/ E4 k6 c( ~
36. #include <mach/memory.h>
    6 U! u7 t% M- u
37. #include <mach/hardware.h>
    6 p! P( Z1 A8 H) w  Q4 c. n
38. #include <mach/irqs.h>
    ( F( l# p, G" z: Y  p
39. #include <asm/hardware/edma.h>
    ! i: g4 C1 R: p: h1 H
40. 
    
41. #undef EDMA3_DEBUG
    1 s1 A, j  |8 ]7 Z
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    * x$ G7 d8 g0 y' P$ V9 ?
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    4 W! s' C/ d2 m  Z9 ~8 p
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    6 M3 q2 ^# a0 K* n9 }7 A9 s
51. #define DMA_FN_OUT
    ) X) U% h/ s# l, `
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 h& R9 t9 e/ B
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    + i/ _& u$ L7 T; j
58. #define TCCHEN_SHIFT                22
    . ~$ G% A5 P7 k3 _; E# @: y9 x
59. #define ITCCHEN_SHIFT               23
    6 p: o. o, i, n2 P
60. 
    * Z# Q( B0 c" D, ~
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    6 q- F) g; [1 U0 v9 h
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);
    0 L, i0 [7 {$ d3 T  O1 J+ e/ b
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    8 d% N8 }% R& e. b$ [% f
68. dma_addr_t dmaphyssrc1 = 0;
    ; M& R1 Y" i8 [( R! {/ ^
69. dma_addr_t dmaphyssrc2 = 0;
    6 \( p; J* M6 ]' W1 h- \
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    $ |9 Q( Z6 h1 U8 [/ V
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    / q2 ]9 H) v) p, t3 W
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , O& ?1 \: m% n- @+ ~/ U
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    0 g. Z  D& A2 l$ n4 T9 _" e
80. static int ccnt = 8;
    
81. 
    1 o+ d( X) J0 h1 V! t3 E( H( y) C
82. module_param(acnt, int, S_IRUGO);
    7 g0 t7 _$ `: k! \
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 I7 R9 w. Y: j1 v2 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。
9 r" \. g5 v" L0 f7 t3 \     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
9 `2 {7 _2 w/ n; s: u( B4 z