OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   + t. C4 P+ \0 [$ Z; h5 B" `
2. /*
   " O7 V. D3 b6 f% ~) K8 R* v
3. * edma_test.c
   
4. *
   ! g7 h1 p* Y# W
5. * brief  EDMA3 Test Application
   8 [1 a) `1 k. ~) Y* Z" b* k$ z# U
6. *
   # I, g. g( D: x
7. *   This file contains EDMA3 Test code.
   ' E! m! T0 q/ z0 I# {
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   2 _! [4 E' D) f, ~) S$ o  v! n
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    6 h2 V& r! L5 k& g" K# E8 `" K- Z
11. *         TO CHANGE.
    
12. *
    6 c) _" f  B! i3 L& [: I
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    . ]: u/ e9 h/ t5 n7 D( M
16. * modify it under the terms of the GNU General Public License as
    0 e2 c7 ~8 k/ }4 M% [( R
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 d& p  N4 K0 I# G; S
20. * kind, whether express or implied; without even the implied warranty
    ; g7 j. B6 U: B* O- p: S1 L
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    & Q9 a. ^/ H+ N  }5 d
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    5 g$ Y# P3 G% ^4 V9 H' Z
28. #include <linux/types.h>
    ! O' H6 }8 b# O7 |6 E! H3 Y
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    & ~8 o6 A+ {8 b* b" p0 ?
33. #include <linux/mm.h>
    ( x) l6 X( O( c6 ~( _  C2 X% G
34. #include <linux/dma-mapping.h>
    
35. 
    * L; [+ E+ d! _' r
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    , h, c" v" ^( c+ L# ~2 ]( W2 P/ s
41. #undef EDMA3_DEBUG
    * V$ c- B9 I8 B
42. /*#define EDMA3_DEBUG*/
    $ {& K0 _; o0 E" C2 t
43. 
    
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ( d# w7 a4 e4 I- w) x, K$ P- `$ O2 T
48. #else
    " V% A0 G( G& \( S) @4 `
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    - z* N* O3 U4 s) b; a
51. #define DMA_FN_OUT
    8 m5 j3 c9 c/ ]6 \! }9 R
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
      {8 X4 f7 G& r- k% Q( N* I
55. #define STATIC_SHIFT                3
    3 d) e. {; S' r/ W, H
56. #define TCINTEN_SHIFT               20
    * w. e3 T; L$ M+ Z9 y/ N! U) R" j/ T
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    2 L; S6 J2 ]+ {5 J. \  m0 k
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    6 F' A+ `: b7 w
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 t0 x# \6 Y1 \: a4 q( a- T; L' b
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;
    + t& ]- Y4 R% g" T% J: C
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    / D' @; g* k: K; S
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    % N# `# d3 a) s* @) `# |
79. static int bcnt = 8;
    ! i1 d0 L+ x7 Z6 ]
80. static int ccnt = 8;
    
81. 
    ; |( z+ E' ~) t. }7 N$ W
82. module_param(acnt, int, S_IRUGO);
    & p( V0 }- w* e
83. module_param(bcnt, int, S_IRUGO);
    ) x; V3 I: G) I3 f8 g3 y1 o3 L! o
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
/ }3 I* G, a/ x1 C8 M( darm-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。
7 o: f1 L7 \. J! E, g8 f% j     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 h% x# A6 ]& z4 ?
2 I# O9 i5 B1 s2 V3 _
+ p  X. ^7 Z: L5 F' @9 `% ]" H