OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   # G) e5 _0 Z8 _4 ?9 g. v4 }9 g
3. * edma_test.c
   4 s: t7 c  y- X9 m7 e! [0 z- m4 C7 _
4. *
   3 n# T# I: v+ j
5. * brief  EDMA3 Test Application
   
6. *
   5 g5 }) Y2 w/ a. h7 l
7. *   This file contains EDMA3 Test code.
   
8. *
   4 g+ k' |' n" W" f! i1 K) s
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
    * w  k, J$ n* p* I3 v( B- l7 B9 E& V# {/ A
11. *         TO CHANGE.
    
12. *
    & m% a8 N& b2 w0 v% N
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + P  z1 ~2 ^' B5 `6 d& m
14. *
    
15. * This program is free software; you can redistribute it and/or
    * g4 ~" u5 W/ Q$ h- X, L& K  o
16. * modify it under the terms of the GNU General Public License as
    9 G: Q0 ~- |  K( p) _) R
17. * published by the Free Software Foundation version 2.
    3 ~/ M+ d( l+ g, |
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    / e  N" C* c1 y7 t$ |
20. * kind, whether express or implied; without even the implied warranty
    4 O2 f# Q1 }1 m6 C
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    # @. I9 b( Q  I
22. * GNU General Public License for more details.
    
23. */
    * F# d  K% m2 W, A' w7 o
24. 
    % k2 {) ]( C. F/ L+ s' T" P
25. #include <linux/module.h>
    ( i. v4 Z, u- S% P& v
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    # v& x6 H! K( W; p. K
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ; R2 d0 x  m0 r
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    & r  A& {* C9 \; _  u
35. 
    ' R* [4 L6 i5 c; r) C
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    % u! ?4 |  d/ G- E/ x
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    1 _+ [+ M" f. a' _
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    - q7 A; l# [0 `, x1 z3 ?% f# U
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    2 [) _) T8 d' f" m8 k0 r
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    9 o( o0 V( }4 t( C: w4 U
52. #endif
    4 b  x5 g& w. C# U' ~: N2 A2 Q
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    . O; y$ F  c! @& f7 b2 l# s9 h
60. 
    
61. static volatile int irqraised1 = 0;
    / `  Q: u/ w- C" Q: [
62. static volatile int irqraised2 = 0;
    
63. 
    0 Y2 l+ d$ m# G4 k/ e! h5 F4 i" J# g
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # }9 q9 ~: [) w
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 [3 {% T# h9 s2 D- k' y) z- W4 k
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( p" k# e- S' S' D
67. 
    $ l+ L  L/ O9 x3 U/ g9 Y3 E
68. dma_addr_t dmaphyssrc1 = 0;
    8 r/ A4 e5 \/ \1 b; }
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    + M6 W! t9 B# K$ t4 U
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    . g, m. s' o5 x9 @& _  x1 K1 N0 D+ T
73. char *dmabufsrc1 = NULL;
    % X3 t! K2 _8 @7 U. D
74. char *dmabufsrc2 = NULL;
    7 }. q; [0 @" T% w6 N* U" X. y
75. char *dmabufdest1 = NULL;
    ' U( ]" g7 s' N7 d: t
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
      T: L! l4 q* E
80. static int ccnt = 8;
    
81. 
    2 b8 Z# \4 D: H: I- S2 c
82. module_param(acnt, int, S_IRUGO);
    4 N4 \# h2 y+ g0 I, n- E5 P
83. module_param(bcnt, int, S_IRUGO);
    7 o; ]" b1 {/ Y
84. module_param(ccnt, int, S_IRUGO);

复制代码

5 o- I) J9 s1 v  ~# p0 C% e1 v      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 P# W# W7 J! e# B$ R/ Warm-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。
; ]& \) n, Y! G; ^9 p* f# y$ Q     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

3 J* u5 d0 \  X5 |
9 X! `1 m" z) t9 x# c) @# k