OMAPL138如何在Linux下使用EDMA3驱动

yyj

  a3 m3 B4 ~+ T- a% q7 e* m

1. [code]EDMA sample test application
   7 J7 P. k- m2 x& _! P. j  i
2. /*
   
3. * edma_test.c
   + f) M! S- k2 I
4. *
   $ S6 T9 R! C. B# B0 j1 F
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   8 o: x) W( M+ r5 v# t6 m8 [
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ; ]1 \4 [' d& N, l5 v$ ^
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    + F# |- b: |2 h  b+ Z% x+ V" O
11. *         TO CHANGE.
    . Q% |; t) l1 g6 G4 k/ j& S: @
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    & V2 \0 o) I3 Z! k5 \& N
15. * This program is free software; you can redistribute it and/or
    / V1 A# K% x- ?3 X2 \
16. * modify it under the terms of the GNU General Public License as
    $ h; F8 N3 C- q" G, f
17. * published by the Free Software Foundation version 2.
    
18. *
    . a0 _1 K; n% `& z1 {
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
    9 s& W' c4 B9 j& [  G  V
22. * GNU General Public License for more details.
    * o5 z+ W; G5 V0 }/ v# d4 |
23. */
    9 f* t8 H9 |+ U  M+ v& r) E
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    " w7 M$ m2 P% P! O, o% _6 E
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    . i! ]" ~# C7 _$ J4 X- }, `7 ?( Q
31. #include <linux/moduleparam.h>
    0 o6 B& D1 [4 z5 V4 v+ U
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    # s+ }' d9 U8 s+ t1 e" X2 n, o& ?' }
34. #include <linux/dma-mapping.h>
    
35. 
    : e1 w" j+ D& ~  M! S: q( d
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    1 i4 ^: l3 Q1 M4 ^9 Z
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    0 S. l, {, ^3 k& T# D( R
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    , ?5 B- H2 b1 z4 B* `: E. u
43. 
    
44. #ifdef EDMA3_DEBUG
    ' V& ?% }# n8 @) U. r: v
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 W/ w, C+ P1 w) g2 z
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    3 b* q7 V+ [4 `0 Z1 P% l
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
      P+ `6 O' c# _
48. #else
    ; D' m+ }! `  B6 w
49. #define DMA_PRINTK( x... )
      X% i  [8 [# A  ]
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    - B& d: x8 `) \% {) ^  _
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    5 V: L, v1 k$ b# C5 x5 J( y
58. #define TCCHEN_SHIFT                22
      T; M8 A+ f( ]5 b
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    " |; R! P% s  s  ~
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( m3 [& C% K+ D3 P
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    + j& \8 {; Z7 L9 g* F
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 o) X6 p  Y6 W* H& O6 G6 D5 |
67. 
    / {+ Z. D: g1 G, O
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ' Y+ e5 S: l" r$ y4 i- i
70. dma_addr_t dmaphysdest1 = 0;
    8 ^: O7 Q+ h1 M3 D# P/ C6 [
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    9 r4 f' N7 _& X9 ]7 l: n
73. char *dmabufsrc1 = NULL;
    & H8 W1 F' K* h/ o* v8 U  z' [
74. char *dmabufsrc2 = NULL;
    ) ~+ L1 J2 c5 a# a) R
75. char *dmabufdest1 = NULL;
    4 U3 [: J7 \% Q$ v. ~1 w
76. char *dmabufdest2 = NULL;
    / |7 [$ ?, B9 @
77. 
    
78. static int acnt = 512;
    2 h. p% w7 a/ B, G0 d
79. static int bcnt = 8;
    6 k6 q, y6 b, ^' x6 ^" Z0 f( U
80. static int ccnt = 8;
    & }7 U: o2 ?( _; W
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    / v" X1 ?* c# `; r: V; |: p/ C" |+ T
84. module_param(ccnt, int, S_IRUGO);

复制代码

3 r2 X- H9 q5 S4 |( C! O; Q- N1 X
* D4 C. y# D$ I) Z6 i& e      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
5 M+ A/ D6 }0 y6 G% 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。
: s  a$ F. {3 v& a2 b2 m     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。