OMAPL138如何在Linux下使用EDMA3驱动

yyj

6 r, o9 O+ p7 y7 ?7 W

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   ) Y8 ^+ i) W3 ^/ Y# a! n9 h1 `: H* \
5. * brief  EDMA3 Test Application
   - A# m9 J: w5 v( x* A
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   9 O: K" |- }* V+ A$ @. C
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    7 d/ l: U+ O" V/ ?0 N
11. *         TO CHANGE.
    
12. *
    
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
    % K# u! ~: `* @( a4 `, Q
17. * published by the Free Software Foundation version 2.
    ! E7 Q2 |* W, R
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. */
    1 t9 H  \5 B2 L- v% W1 [4 U5 |# U- h
24. 
      f; I4 z7 y/ g9 S
25. #include <linux/module.h>
    8 P/ h* a9 ^' f8 l: I1 g8 e
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    % o% A; H6 F+ p
28. #include <linux/types.h>
    ; Y, A  ]' H* W: B
29. #include <linux/interrupt.h>
    ' V- o- R) H9 E1 D; N! C4 K. c
30. #include <asm/io.h>
    $ }8 J& I" b- _4 ?$ f
31. #include <linux/moduleparam.h>
      I% z4 U. s7 P! d
32. #include <linux/sysctl.h>
    ' y  B" F) P" V. l5 P
33. #include <linux/mm.h>
    . ?% b3 n4 I7 z, q+ d4 r4 Q2 H
34. #include <linux/dma-mapping.h>
    - o2 v+ x# D5 ~) g! F
35. 
    
36. #include <mach/memory.h>
    0 z: D/ c) X0 |$ D1 g
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 Y& H7 M" w/ n& w
39. #include <asm/hardware/edma.h>
    , |' {* k3 l8 V
40. 
    6 X; c: r* B  ^3 Z% l) v
41. #undef EDMA3_DEBUG
    $ u* R* m% `# u
42. /*#define EDMA3_DEBUG*/
    
43. 
    . I$ O( g1 w0 u7 v  S9 @/ S
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__)
    . |8 w+ b: W7 V0 S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    0 s# W8 g( `7 \9 P8 H: q
48. #else
    ) d7 c  ]8 l) ^- e. v) l: k2 p
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    * c% V% ^5 R9 i  @( d+ J
51. #define DMA_FN_OUT
    
52. #endif
    3 Z( F+ Y  \& A. Y( P- o
53. 
    $ |! d" J3 ]9 {0 v
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 M* }1 f& I8 N
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
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);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 o% _1 v3 `0 P, {5 _" z! C4 g
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 ]! a3 q, Q4 V( i4 K
67. 
    . B& n" @. J7 g* c2 h4 o) \9 H6 M
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    8 r& o8 X6 S9 g* b8 A: [* v
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    & Y5 n1 F+ ~! }, I
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    + c+ v; N. }" z
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ( A' P2 b$ g- e, ]/ I6 n" @
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    5 T4 ~; z5 x! ?" R' u3 D; N
83. module_param(bcnt, int, S_IRUGO);
    : Q, g! g: \4 d' |
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
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。
9 B- @- ^2 y0 u) x, f, q1 W8 B9 y' w5 e
9 T" o% m! x% y% L: x; K5 Z( ]
0 T9 Z6 P, k+ y% }+ Z) ?! p, D