OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 T) q6 ?& M0 u7 g" X$ D" R- k

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   # L5 A6 Z. Z8 U" \
4. *
   % l7 V5 h( i8 @) M, b% C/ o
5. * brief  EDMA3 Test Application
   
6. *
   2 k, t8 l4 c. F
7. *   This file contains EDMA3 Test code.
   2 A7 e: p9 n! C5 a4 N. a
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   9 Y/ a! c0 S' {) z% f. j
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    + d0 j- @. Z% e4 T/ f
12. *
    ; V( ]7 O! ^: W- Q8 l% D' K
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ! @2 T' l# r; N2 W, ?) q
14. *
    
15. * This program is free software; you can redistribute it and/or
    2 [: f3 R5 D+ q5 v0 ?
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    # p6 i, H4 H7 s3 P& ?! ]
20. * kind, whether express or implied; without even the implied warranty
    # A8 q7 ~& h: w5 ~- C7 M
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ( d$ _- @% E8 o  Z7 U1 f* n9 K4 X+ m
23. */
    
24. 
    ' R2 g- p/ H- o2 A, x: p) ]3 x
25. #include <linux/module.h>
    ! Y; s) x: N- E8 H- ~: |) M
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    + `3 q5 `& v% C  F; {( B: j+ o
28. #include <linux/types.h>
    % K5 e9 ?1 h, [3 y: M* u
29. #include <linux/interrupt.h>
    6 Y* ~/ Z& r# f8 G1 s; ?0 Q
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    7 W6 K1 L" x  ^3 z$ y# [! q! `
32. #include <linux/sysctl.h>
    1 W# k) x5 e$ {& |, b
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    7 Q! Y! x1 n6 E8 [
36. #include <mach/memory.h>
    " J% a' C9 C# {' Z9 J/ n
37. #include <mach/hardware.h>
    + B) C  ?% ^" O/ S9 v1 [
38. #include <mach/irqs.h>
    ( ~& L* f  h: V
39. #include <asm/hardware/edma.h>
    % K5 |- e: ]6 ?# l3 J+ V
40. 
    
41. #undef EDMA3_DEBUG
    ( `% G" t! q% U5 y+ U$ d0 V3 V2 j
42. /*#define EDMA3_DEBUG*/
    . d, t- [+ \4 R2 D  W
43. 
    
44. #ifdef EDMA3_DEBUG
    * A( U5 q5 A( I( d# h% s
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' r# c1 _* Y, A4 ]: T" R! Q
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ' G+ m" |$ S$ q4 v8 _
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    3 [' L* _8 M0 q0 i
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    + j+ J( o, B! W' d% [6 u/ K& m& f
51. #define DMA_FN_OUT
    % f! `7 C. B2 T/ u# a2 u
52. #endif
    
53. 
    $ p: q$ O, W2 o8 i) ~0 {2 e
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    1 r: D9 o  E  {
55. #define STATIC_SHIFT                3
    8 U  o" Q# K  |& S
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    & v! M5 Z9 Z; U" d5 I
61. static volatile int irqraised1 = 0;
    ! }, M- j0 k- c
62. static volatile int irqraised2 = 0;
    
63. 
    & Q, A) J' O- H' J( a) D
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 A9 c0 E8 z8 x5 E
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
      Q6 S9 h9 V! D! r# b
69. dma_addr_t dmaphyssrc2 = 0;
    9 Z( w( m! p, r7 U( N
70. dma_addr_t dmaphysdest1 = 0;
    ; k* }; B* x) Q! }) z' f& T! q
71. dma_addr_t dmaphysdest2 = 0;
    6 S7 N* l! `+ l. }/ h
72. 
    3 F/ }5 o; z0 A+ d9 @: K& h# J
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    4 B& c2 G. L8 n6 E8 [
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    & C: V# r/ t, Y
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    1 {4 p; G( g9 {4 V& P$ s1 K" B
81. 
    
82. module_param(acnt, int, S_IRUGO);
    0 O- B& Q, {& G
83. module_param(bcnt, int, S_IRUGO);
    5 a0 s+ q* t. B6 M/ ^; u6 A) p
84. module_param(ccnt, int, S_IRUGO);

复制代码

. Q" z; Z) g. ]% D9 q
      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。