OMAPL138如何在Linux下使用EDMA3驱动

yyj

# A8 c+ P% j% o' l

1. [code]EDMA sample test application
   
2. /*
   ' U0 B: o* n% Z: K& z* |5 V3 ]2 R
3. * edma_test.c
   8 {5 V. s2 x5 o$ {2 z1 x
4. *
   # }1 ^  ?/ s; z0 ]0 \5 ]0 J2 [
5. * brief  EDMA3 Test Application
   - r6 G$ f9 O3 r7 h; }& N  ^; Y
6. *
   0 Y% q8 D3 ?2 _( Y5 o& }
7. *   This file contains EDMA3 Test code.
   & s* M! k, M2 O1 I3 \
8. *
   2 e0 K! b7 M6 C3 I+ P
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * G7 p- W2 i2 g8 x" F: ^( z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    - Y) n3 t9 n9 @0 Q; H
14. *
    
15. * This program is free software; you can redistribute it and/or
    , Q) T5 X5 g0 S1 g+ o9 A" @4 x9 q: j
16. * modify it under the terms of the GNU General Public License as
    ; u; m6 L8 [2 ?& A3 w
17. * published by the Free Software Foundation version 2.
    & k& _. K4 b) h8 r1 G/ T; n
18. *
    % P2 T1 w' W$ A1 @. W9 `3 n
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    6 |! p/ I% @# w
20. * kind, whether express or implied; without even the implied warranty
    ' O% K3 }5 W* Q' ~4 i
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! B1 ^' K% D0 X' ~( J
22. * GNU General Public License for more details.
    
23. */
    
24. 
    3 Q; j& [$ k- S, V( R/ m3 x/ @
25. #include <linux/module.h>
    4 e/ V8 y4 N4 t. t
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    7 V9 ]2 J* u  \7 \3 O) r
29. #include <linux/interrupt.h>
    " c+ K- c1 T/ p
30. #include <asm/io.h>
    " H7 g; J% _% }6 F$ ~# `
31. #include <linux/moduleparam.h>
    9 K* R, Y( d( E! X: }0 `
32. #include <linux/sysctl.h>
    6 H: _- U3 o4 {4 A: @$ t4 d3 q
33. #include <linux/mm.h>
    & [; K% _  r- S9 r* Y: h5 d
34. #include <linux/dma-mapping.h>
    : p! ~+ w1 N: T+ V. |2 q
35. 
    $ R& P: y/ P8 ?6 d  C6 K: Q$ [. r( k
36. #include <mach/memory.h>
    3 e& e$ J& L. R6 U' `# N* P
37. #include <mach/hardware.h>
    2 x) b/ |  H" `  b, e  w, ]- j
38. #include <mach/irqs.h>
    / s6 I; _8 }& H/ O( \
39. #include <asm/hardware/edma.h>
    : Y5 @4 K5 B: H: J( P3 |
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    + [' Y* ]' ?, d2 c
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    # p' [1 ?0 U$ ]5 b; w( C
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
    6 S9 {5 T* t6 |% l: l
49. #define DMA_PRINTK( x... )
    ; `3 ]; X: O7 ^% s: J2 s9 e
50. #define DMA_FN_IN
    4 @4 l! F- B3 @( E  {! k" I
51. #define DMA_FN_OUT
    / o' s+ P# b9 Q% X# C% R* O
52. #endif
    * [) e" V# @2 c# z5 m/ _$ c0 Y
53. 
    % |( r3 ]' \( q# t
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ! I1 w0 h9 G' ?6 K8 ?" z; d
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    6 h1 Y1 g4 g: A7 N
57. #define ITCINTEN_SHIFT              21
    ( K+ M! P. ~! b4 e8 o
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    7 W# v& {# J; @0 g" p; n2 X) Y
60. 
    4 B, ?1 H& Q; U3 f8 D* w( W4 X3 T* x
61. static volatile int irqraised1 = 0;
    5 ~% g9 V/ x, Q) _
62. static volatile int irqraised2 = 0;
    . g4 c# j* o5 q" o
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # ]  N4 {0 F% Z+ q) I) a$ k7 n
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 w  j7 e$ v. n5 x
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - v$ ], U8 i7 f! m3 Z0 N
67. 
    5 n6 c4 @) O: x4 ?- ^' Z
68. dma_addr_t dmaphyssrc1 = 0;
    & s) c! t1 |3 W% m; D/ Q( m
69. dma_addr_t dmaphyssrc2 = 0;
    7 @. N$ e# y9 u, }9 }
70. dma_addr_t dmaphysdest1 = 0;
    % k6 X4 [7 F5 R! h
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    2 S2 l! Y0 y% q" h% ^9 M* [
73. char *dmabufsrc1 = NULL;
    + Z- ]0 `# q3 D5 z. L6 B
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    & L) }% s7 S& a4 C/ m
77. 
    + e/ P  {1 e' i* V
78. static int acnt = 512;
    
79. static int bcnt = 8;
    1 E2 N1 j. h1 v5 m% `) I% b# E+ w: s
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    5 l: {- ?) l7 R4 o8 g5 b5 t" X
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

  w8 w* p/ c: x. d% A' M: p
      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
# p: m7 n' A* g7 a+ {7 E, r7 aarm-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。
4 r6 Y/ k% ~' U( f     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
' N, X! v9 I+ S
6 ]5 }. Z( N4 g  q
8 W& i5 h. @# d' w- Z- ^