OMAPL138如何在Linux下使用EDMA3驱动

yyj

: b& E& x) b1 L& p. T1 R

1. [code]EDMA sample test application
   0 H6 F" T' P' \% B
2. /*
   0 e2 f4 e. h, O
3. * edma_test.c
   
4. *
   . \7 j0 `7 T4 o. T
5. * brief  EDMA3 Test Application
   
6. *
   1 z: G+ E, u& `, H/ R+ d
7. *   This file contains EDMA3 Test code.
   8 q6 T0 r" K7 [* r
8. *
   : J% H" d$ R* X9 h- r2 b
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
    " }4 w4 _. {" n# I* u5 P- F
11. *         TO CHANGE.
    ( i+ D7 X7 [" h( w, C7 z" x
12. *
    9 G$ D) O7 l; z& F5 a2 `: ?
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    % s  b5 Y2 J5 b1 I2 H
15. * This program is free software; you can redistribute it and/or
    ' a: v, I. ^' w. C) W( O' c/ C  P3 w
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    $ G6 Q# O9 U( b; r& b
18. *
    % z) Y' x6 F/ I! c% [
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; |1 X3 o# l; D! e+ q
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      F) Z6 p+ z- @! S; U- ?
22. * GNU General Public License for more details.
    
23. */
    
24. 
    0 u8 T8 L0 P$ F2 N- R
25. #include <linux/module.h>
    ) `8 l* e1 }; u
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>
    
31. #include <linux/moduleparam.h>
    5 F* f* N/ l/ g/ L# X8 Q
32. #include <linux/sysctl.h>
    & T; @6 N/ X5 a, d
33. #include <linux/mm.h>
    6 Q! F! A- E& E5 T/ m, p( X1 h* z
34. #include <linux/dma-mapping.h>
    & H4 U: N' E% x& t! b9 L6 L: g
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ; P( r. U0 ?$ w# X9 L$ K3 g
38. #include <mach/irqs.h>
    7 G* z: m: Q& R  L' V+ j& E8 I
39. #include <asm/hardware/edma.h>
    
40. 
    ! N2 m% N4 D3 @* i
41. #undef EDMA3_DEBUG
    5 v% ?! ?, R# r+ v7 U5 a
42. /*#define EDMA3_DEBUG*/
    ' }& v5 J' C; x6 x" l
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    + S$ c) T# B! r$ D
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    , S  c3 n8 K  c
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
      L, _) y' C' J
51. #define DMA_FN_OUT
    % l$ [  I5 @, `+ b1 n/ H" O
52. #endif
    " R+ u" m, o" C' Z4 F
53. 
    * f* o+ ?/ x$ w9 s
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    & M2 w7 W- j8 R; i( I! s
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    8 D2 ~' w3 f- t/ U* z' r: |
59. #define ITCCHEN_SHIFT               23
    / d+ B; d+ Q; g7 O+ V
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    # q5 e7 d0 F& b: N4 ?3 b
63. 
    6 G# M/ \( k# W4 v9 J7 E2 Z. v  T
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);
    . X5 P! }4 v! M' K- ]" }$ _. l
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( q, Q) I, ^7 X2 f7 C4 b
67. 
    8 J0 z+ o; t0 a* D! x( ~0 q( Z
68. dma_addr_t dmaphyssrc1 = 0;
    9 D; @: n$ i8 P4 g
69. dma_addr_t dmaphyssrc2 = 0;
    " v& v8 F, W- V2 @, F" t. s
70. dma_addr_t dmaphysdest1 = 0;
    ; |; W  j4 ]; w  {
71. dma_addr_t dmaphysdest2 = 0;
    . \1 O7 I6 r* F1 ?
72. 
    8 v1 Z9 @+ \; A+ s& \" [% C
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    $ r+ x$ _& K- A7 u, }# A6 C/ f! ?
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    1 o. J1 _* M' K7 o
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

      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! F$ c- O3 E' U# Yarm-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。
" G4 |4 i" X) K: Y3 |     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
+ q# q" c+ t  D' d: b