OMAPL138如何在Linux下使用EDMA3驱动

yyj

% ?: u) z* N% ~* _& u

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   ) S+ l( Z& S& U4 H1 G: N6 x
4. *
   + \( \8 N) A; W; v
5. * brief  EDMA3 Test Application
   ; T, \8 _7 H) l8 M' H3 t+ W
6. *
   % f& b1 d* ^, c6 K: O5 t
7. *   This file contains EDMA3 Test code.
   9 H8 X; u- h9 n. z9 p9 z
8. *
   7 T7 w9 J1 A& a2 m
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
    7 F8 e( u; ^/ i3 h) h) H6 ^7 v5 Q
11. *         TO CHANGE.
    & X( z, F  E* Z' w
12. *
    ) l4 }2 V( l# h2 f$ Z  M8 P4 s) M( T
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    , n3 V, g8 A) u: i
14. *
    ; n  u3 p; D6 P* ~! g4 d
15. * This program is free software; you can redistribute it and/or
    # L$ ^( R% w8 \' R# T# |7 C
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    1 F! i* \/ f5 c' e
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
    - H6 p  M0 W2 Q, V9 }
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
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>
    , ~# O) @5 U6 F6 m
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ' `9 G/ ^% C2 V4 G; Q. C3 M
32. #include <linux/sysctl.h>
    5 \5 e, E3 d; k( q2 G+ j
33. #include <linux/mm.h>
    $ z7 _9 [' ]: s- o4 V
34. #include <linux/dma-mapping.h>
    : k- d8 j" z  a: K9 [- g
35. 
    ( s$ T$ u; Q0 u. o; F5 ~# T# Q9 H
36. #include <mach/memory.h>
    * @4 g0 [6 I* V2 R. C- F2 {
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    / M& t2 e9 L3 b1 X7 Z. ?+ T7 x) Q
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 j, |& ?3 ]7 l6 X( }% i
43. 
    
44. #ifdef EDMA3_DEBUG
    ' f) k0 @$ X. J% F
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    # }% G% e2 @- i: U! a5 }
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    % |" G$ u( s% A* D4 W
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
    1 B9 h6 r1 L8 D
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    & `. I! v. V2 d" i6 q, P% |
59. #define ITCCHEN_SHIFT               23
    
60. 
    1 S7 ^* X4 c( k' A" p& ~
61. static volatile int irqraised1 = 0;
    4 \- ?3 a& N2 i% M5 |& v
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : x$ i& O. O- h- b( Y9 J: A
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    + D; e' e" H+ \- N. U* L
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # U$ W0 D, M2 i
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    5 D$ W2 n) r- o8 ]4 q5 E
69. dma_addr_t dmaphyssrc2 = 0;
    4 b# e* [& P$ L0 _9 m
70. dma_addr_t dmaphysdest1 = 0;
    9 ^7 U1 Q5 f) h" I: F7 }- ]
71. dma_addr_t dmaphysdest2 = 0;
    ! D+ N! F0 k( J
72. 
    + b$ p! s5 B7 c' }1 p5 E- G1 v
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    6 X$ T& U) B1 M- I* g$ w
75. char *dmabufdest1 = NULL;
    # i# K' H! Y  @- W9 b; S& o# g- \2 X
76. char *dmabufdest2 = NULL;
    
77. 
    & M( ^, }2 ]4 L  q. E' h
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : O( {; Q4 Q1 R: i/ G
80. static int ccnt = 8;
      O' i8 i: S3 \3 u
81. 
    ( R/ d3 G, }2 N# P
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    9 ?' P+ q2 M* C# c" E2 G
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 m8 j$ [5 U) }
      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。
- [$ z- o7 Y1 f* J9 o     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
  X1 f* [1 Y+ G& S