OMAPL138如何在Linux下使用EDMA3驱动

yyj

- U) b: d$ h+ @5 H- }" _) J- j! R

1. [code]EDMA sample test application
   2 I2 n# }. B8 V& d+ m! B/ S0 O
2. /*
   ! |& j; ^% x7 Y$ d
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   1 M6 ?7 U+ Q' U7 f
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   / B" z) k5 o8 ^7 a! Y
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
      p5 o  u1 r! D9 @$ G
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
    - z+ B5 S7 O! T# T' u4 T
17. * published by the Free Software Foundation version 2.
    6 M6 D$ J! g0 P) J# i0 ?% `
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + ~$ ?( `# P+ E( P) Z, d
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. */
    " V/ Q9 K+ u4 h1 E; s
24. 
    / d& ~+ ?6 d' Z# v
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    - M& e! S! c' M3 f" E: o5 P6 I
30. #include <asm/io.h>
    ! b; z4 z2 T5 G  H" E
31. #include <linux/moduleparam.h>
    7 x2 Y0 Z( w& ?. Z3 |
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    : C* y/ B0 J( a" U( f
38. #include <mach/irqs.h>
    ( h* X; f' l& }1 a/ m
39. #include <asm/hardware/edma.h>
    3 q6 V8 |% \- \) G
40. 
    
41. #undef EDMA3_DEBUG
    8 E6 a( W% E/ n6 \
42. /*#define EDMA3_DEBUG*/
    % n4 `/ i. }2 ^7 i$ f
43. 
    
44. #ifdef EDMA3_DEBUG
    1 C4 T2 f: b- k3 Q$ [; d( f
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    # e" G2 g' q6 V- t8 x& @0 f
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
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 ~# o/ h) [& W4 X$ c: h% D& w+ ^
51. #define DMA_FN_OUT
    % ~% u& r0 }- G) B. d
52. #endif
    
53. 
    . y" J8 L+ e3 Z0 m$ A
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
      X6 S8 G* O* C1 N8 R
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    : j/ _* |* K* G. q7 n
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ! g# v- @, d" O3 H
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ; @. r& r. h( [  p0 u, K
70. dma_addr_t dmaphysdest1 = 0;
    / M+ N- d- W' O3 V& B( c; j
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    , T/ J# P; M3 J" u1 L) _7 ?# ]! ^3 A4 C
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    - ?1 U- R9 P; }! v1 c7 j* I
81. 
    # W! U2 d# V5 Q9 a/ \  `5 ~6 l
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

$ K. j4 B3 Z5 k7 m4 b      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
+ ~6 D# k3 ?* J& Y. E0 g8 v  garm-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。
2 E0 D, J: S1 y( Y     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
7 @3 ?& D( f, S* }- O5 A& y
) w- P% T$ e( b4 e  \5 v