OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   , r  Q/ y6 m5 V4 l
2. /*
   ( d1 M' q  ^9 T. v) p( q( J
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   6 L3 D5 F3 Q! y, x) R
7. *   This file contains EDMA3 Test code.
   5 q. }0 u' j- i  [, y
8. *
   - x' I, D- r& z" O  x
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    2 M4 v- x2 H+ x' c  Q
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    : _& H- [! v0 c, _  S
14. *
    3 @- a# b; l$ \- `3 |
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.
    $ U, H( i& e. D% |9 h
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
    # U, H8 L6 y8 Y" Z" ?
22. * GNU General Public License for more details.
    
23. */
    ! ?- ]1 z: ]& v2 I
24. 
    9 j) ?. q, D! K' P% |( G) B
25. #include <linux/module.h>
    , P5 U( L. I; h& k1 S
26. #include <linux/init.h>
    # b: ?! Y0 B% r
27. #include <linux/errno.h>
    6 I) M) H! O: r2 a% F2 x7 p
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    4 n6 T/ O7 h$ b( @$ D
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    6 w/ G, h$ c8 v- q, C
32. #include <linux/sysctl.h>
    3 h5 _6 Z' c4 d2 u. A
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    - R$ H9 G1 v: `2 t3 n$ y: A+ q
36. #include <mach/memory.h>
    1 ~9 v" @6 B% ~+ @" w
37. #include <mach/hardware.h>
      r) D. |; R8 v% q) H/ X* Z) j/ b
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    8 j% h1 [& [# T+ L" i+ @9 z
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    9 a$ p4 H: X! G4 g  Q* \# k: y
43. 
    6 S8 e, a9 C& w; U5 s* X
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__)
    ; k7 `8 h5 Q7 v
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    $ O$ U) ]) N2 Z! Y2 j8 }
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    " H# O! q5 z. y- K& N
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ! w& u8 g& L6 B% \4 F
56. #define TCINTEN_SHIFT               20
    , @1 m7 X2 i: H
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    # P/ {+ Q" M( d# H  W" A
61. static volatile int irqraised1 = 0;
    1 o; x" D! v- c0 `3 S- s, `
62. static volatile int irqraised2 = 0;
    
63. 
    . w+ l1 t  X) Z  n) ?1 i
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * r) X/ q& K; h* P  t4 ?
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : V% b/ U' d+ w) L
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 e3 R6 d' {, k7 c; n8 c5 f
67. 
    3 M, q! l$ V' ?8 g- [% k% Q
68. dma_addr_t dmaphyssrc1 = 0;
    7 ~( T; I9 u2 k! {" R
69. dma_addr_t dmaphyssrc2 = 0;
    8 l7 |0 V0 }* a1 Y& Z
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    : w( n0 A8 Z7 A( E: E1 L3 j7 x
72. 
    
73. char *dmabufsrc1 = NULL;
    3 f5 p( f1 i) Y8 M. ]
74. char *dmabufsrc2 = NULL;
    4 C8 d5 L5 J; l4 a' U4 p8 n7 o
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    0 L+ }3 M3 c& `
77. 
      \5 z: m7 k0 m3 U
78. static int acnt = 512;
    " r8 H* X# }# v- j! S9 L% S0 i% @1 K
79. static int bcnt = 8;
    0 ]1 I$ I0 }3 Z) L! f
80. static int ccnt = 8;
    ; G" P( `5 N! h+ |) L
81. 
    ) H9 w' ^0 s* r" y, B' K) w4 U7 _
82. module_param(acnt, int, S_IRUGO);
    & ^8 X" w) @0 ^' ^9 M4 _
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 @) `( I/ |" X8 E2 R
* K' e: ~2 Z/ d3 \- j& h      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。
* L- [& w; M3 O' D     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


$ k! _" }9 }" |0 o, |