OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
     Y3 _9 i9 r/ i
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ) x" R: `/ V1 Q+ b
7. *   This file contains EDMA3 Test code.
   
8. *
   : m# v8 U" N1 k; Z, R4 y
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.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ( g% |4 `$ s- h. W, t9 L/ K
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.
    4 P2 S( I! x+ y( y
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    % F" C( ^9 E/ [+ a
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! y- j4 g. q1 j  C
22. * GNU General Public License for more details.
    5 A- }4 u2 u0 L" U, U( L' }* ~
23. */
    / n. d- z6 H, S+ R! H' V& A
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    1 h+ x+ D% v+ `! u  [' Z# }
27. #include <linux/errno.h>
    " B6 A$ D8 k0 Z, c" n' R! Y
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    % m; a. _5 {6 u* J8 c
30. #include <asm/io.h>
    7 m' u3 ?9 E& _$ d
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    9 V9 R& L" S0 ^7 o" }
33. #include <linux/mm.h>
    $ G0 H2 r. E1 X' E
34. #include <linux/dma-mapping.h>
    0 N1 r  J5 _# y% W5 h& q- j
35. 
    
36. #include <mach/memory.h>
    2 k9 _% z$ o$ q% c: U9 Y9 H. ^, ]
37. #include <mach/hardware.h>
    0 ?  I$ n' F( L9 j/ L2 P$ [
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    ) C( Q) n- C6 Q5 y( @1 Z* x
44. #ifdef EDMA3_DEBUG
    - x: @' h5 t, @) [' ]/ U# g3 [
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    4 J5 x' @1 h- U+ F% }- T% ~6 a
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    " }+ O% w1 u/ W  V* |
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    * z3 ]% k% O3 T) t. L: C- v
48. #else
    ( G; ?, s; Y- Q! a7 n
49. #define DMA_PRINTK( x... )
    2 ^9 u2 t% y8 x- f( |3 |
50. #define DMA_FN_IN
    " U# v0 P% {% z8 V
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    : m- J$ K- F& `$ E  C! u4 w
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    , q; t9 |3 G8 ?7 _+ K5 W
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    3 \8 p: v. I) V2 @/ x
60. 
    . J3 C( R1 x3 b/ y" B/ s+ S
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    $ ]/ R, p7 W7 T0 m* c
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . O# Z  F0 S' [: a( ^& H
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . w9 F3 n/ k9 k
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;
    . b& ~8 p! p$ g2 K
69. dma_addr_t dmaphyssrc2 = 0;
    & L1 g* [: E* x* B0 e! D' g5 B6 e
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    * t; U: h% V' g, A* n( i+ l# H$ h
72. 
    0 |3 }% T9 }" ?% y
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    0 z# @, I; x7 \) M, s' Y* M
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    9 d0 A- Q9 T' T3 ^+ z2 X2 ?
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    : ~' |, W* K# c, e; l4 D
81. 
      i5 A% ^7 f1 o; g$ v/ h' J
82. module_param(acnt, int, S_IRUGO);
    - }' r* F( g0 a0 f! ?7 c; L/ z* Y
83. module_param(bcnt, int, S_IRUGO);
    # F  z' s- b) s9 w
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
1 Z- X1 n& G2 _0 z8 |4 Larm-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。
  k  s" c. K: S3 D5 u     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

# p+ j7 I- `+ r3 U