OMAPL138如何在Linux下使用EDMA3驱动

yyj

* @7 R  c( z3 N7 _9 S1 R( x: |

1. [code]EDMA sample test application
   
2. /*
   5 U3 v* b& C; C. M% B* n
3. * edma_test.c
     z* p  R4 t/ j# s, G
4. *
   3 h$ b' a& `1 [# W- w; j1 o
5. * brief  EDMA3 Test Application
     X5 l/ J5 J. P3 D
6. *
   ' x* U# r- d$ S# e" r
7. *   This file contains EDMA3 Test code.
   ( s) h* v0 j) O2 l
8. *
   & H) W# ]1 ]# `1 ?: x5 `
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   / S% b4 o* n8 _% O" b3 l
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    9 Y* v9 |+ Z4 @$ r
12. *
    * K" G( d  ]+ @
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ' q/ D9 n% p6 z! f4 ?! p
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.
    1 J& f8 p* }) s: N: E
18. *
    4 Q( C$ K8 c0 j1 E3 h
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    : Q) m1 k/ @- g1 e4 I) o$ X) |
20. * kind, whether express or implied; without even the implied warranty
    2 \# o+ [) G0 }, a: r7 K0 I
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & @4 W( F0 J5 R% ^
22. * GNU General Public License for more details.
    4 B# @; D) k9 a
23. */
    
24. 
    2 b- A4 V9 ~3 @6 {9 m) d) J
25. #include <linux/module.h>
    ! {9 }% X* q8 g( c. v% d
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    6 E3 f$ F# G% k
28. #include <linux/types.h>
    " Z1 L$ B# Y+ O+ a2 K# R2 o
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    . |; c% |! b( ?+ l0 q
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ) P$ J% C* x  G& s0 z
36. #include <mach/memory.h>
    " k5 K9 D- I% A6 H
37. #include <mach/hardware.h>
    ( t: [6 ]5 y0 n- Q5 T+ q
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    1 k8 y/ w* G2 Z3 D9 V
40. 
    ) P# ^9 b% k; o; L4 }0 I3 n
41. #undef EDMA3_DEBUG
    4 z& F% }0 ?; Z  U: `
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    + \9 ?* W  v# t8 ~+ y+ N) L
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    $ c8 Q( t" \: |: B( x8 ]8 k
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... )
    3 {+ {2 x) D4 E) ]1 E
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    % _8 M' e, E  W$ V8 O" |
55. #define STATIC_SHIFT                3
    3 [9 v+ q& ]& }( ]/ R5 D, l
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
      E" H2 ~& n# A/ i2 l! W
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    9 V9 ^' g. W! Q7 S$ Q) g
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;
    * O  w% \- e; X5 q
69. dma_addr_t dmaphyssrc2 = 0;
    ( O% u, j) ^9 o8 A+ ?2 U
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    0 P7 C$ `$ @) N; Z9 t& h
72. 
    $ b7 h: q) h6 ^! _" k$ @7 K' ~8 u& z: Y
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    . S5 T) ]) |% U9 x
75. char *dmabufdest1 = NULL;
    2 [+ ~% V, h* E3 n
76. char *dmabufdest2 = NULL;
    
77. 
    # l$ I+ t* U4 }
78. static int acnt = 512;
      d- p5 N8 `& g, ~8 O
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
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

! R7 M, E0 ?. e# k" O9 e+ }/ a7 P. i
      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
" ?# I, |- D  f" w5 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。
" O, p# k3 F1 {: B. _- H     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
% J# ?/ x6 h5 f8 U