OMAPL138如何在Linux下使用EDMA3驱动

yyj

- Y' N0 ^+ H( x$ S

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   7 C: |# Q4 s, V# S: Y. I
5. * brief  EDMA3 Test Application
   " z# P7 \2 Z1 p* ?
6. *
   * J3 B+ o. i$ g/ |
7. *   This file contains EDMA3 Test code.
   
8. *
   2 A! m7 U# l8 V4 h- p
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   & W# {* ]9 [. a. v' z9 y5 a
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    3 `7 t( {% r8 A0 z  h  N
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ! l# B3 C" s( k) j
14. *
    1 x6 K2 `- J& t( F7 Y0 {0 w
15. * This program is free software; you can redistribute it and/or
    . X: U4 T) K' O" Y& E6 r6 A
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    . h! @+ w. ]" s& q/ [0 R
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1 \" S2 T9 C' g. X8 o/ y: H; e
22. * GNU General Public License for more details.
    
23. */
    
24. 
    ' m2 w1 Z! B" [" b, h+ E7 ?
25. #include <linux/module.h>
    8 B8 W, b2 ~9 i1 X; g. j
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    / w$ M+ o$ {' t2 M' }- U4 N6 ?5 \( d
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    3 z/ s( ?1 c# A6 V$ @3 B3 }/ |
33. #include <linux/mm.h>
    ! \2 e+ g  E) L& r1 Z
34. #include <linux/dma-mapping.h>
    7 Q9 V  k, v" E+ _
35. 
    - v$ U; O4 o  s6 L: k
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ( W- t' g. R  w  F7 u; k
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    + ]2 O3 B1 Q7 v; c
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . \: j1 a4 K! n. v& J
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
    7 @: k, \# b  J8 F
49. #define DMA_PRINTK( x... )
    0 n; J) ^5 d4 R' u/ J* L
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    + o" p* c# X7 r' w! n; Z6 G  r  N
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    + C! o- E0 J; ?/ Y: ^; A
62. static volatile int irqraised2 = 0;
    ! j8 ~- Z3 W* U# i
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & b6 Z5 a( T9 c- K9 P- r: `
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. 
    4 R; [7 b# e  `  I
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    " K; D5 G+ r  X/ `) m
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    6 |# C! Y9 ?9 {" K" Z
72. 
    7 j, R8 I7 I3 o. K) c
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ' p* s" o) V! A
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    + o' I" e' j1 U4 Y% \4 Q* s1 K
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    % Z6 r' |/ F' Y1 `* ~
84. module_param(ccnt, int, S_IRUGO);

复制代码

# V% ~/ a& i" Z$ B; O! s, D$ N
      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
$ [0 C1 _. D4 Uarm-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 M4 e) r4 e+ ?1 W