OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 C! u& c  _; F; T( V

1. [code]EDMA sample test application
   
2. /*
   - b7 {1 P. `8 `9 `" w0 H% v8 D4 ~( U
3. * edma_test.c
   # A: r( a4 \- e" L/ L
4. *
   : s- M* _" c% d3 ~4 Y
5. * brief  EDMA3 Test Application
   # |+ J7 y: P; [0 b
6. *
   
7. *   This file contains EDMA3 Test code.
   8 H/ V2 O1 k) U* y+ q  j) I/ i3 \
8. *
   4 E  {* T- i" k( `; ~  h
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
    $ g* i$ w! E# x4 Z
11. *         TO CHANGE.
    / M8 L5 I" ~$ e
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    , k8 _8 F5 I3 ^" ^9 j: P
14. *
    ) |4 j) O$ U  ]. Z1 Q) @
15. * This program is free software; you can redistribute it and/or
    * [2 z7 n* x4 z5 F
16. * modify it under the terms of the GNU General Public License as
    ! _- U% {# c# g6 T2 y4 u' c( B4 m# |5 ~
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    - I6 i! j0 N8 C
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1 }! d) s1 V  l8 t& h1 ~# D# E& {: F
22. * GNU General Public License for more details.
    - ?5 m* F' _4 F  z5 k$ {8 v$ S! ?
23. */
    ; g& B5 U+ d# _- A
24. 
    
25. #include <linux/module.h>
      m' b  A+ s2 t6 i3 ]8 J' P
26. #include <linux/init.h>
    7 @, W" m, }/ _
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    * q) D/ c. m5 a' S" v- w2 r
29. #include <linux/interrupt.h>
    / w; l; ~2 _$ F7 L& @
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    . N0 b. A6 N' I5 Y( q' A3 Z
32. #include <linux/sysctl.h>
    * d" l$ K3 X( P9 g2 ~- i) J+ m
33. #include <linux/mm.h>
    : K/ Z% `# D) V" b6 ]4 I$ ^
34. #include <linux/dma-mapping.h>
    
35. 
    ( h( ^/ ~1 ^0 h. t" d2 a- i* g
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ) w  P1 R2 v! ]4 B/ t
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    + `& c% u' E: o" }" n
41. #undef EDMA3_DEBUG
    0 Y1 e% A( V1 Q) i$ Q" e0 z
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    , m# C' h4 k$ J3 E9 a3 f: [
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
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
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    : V0 v7 p2 e* ]7 I! \) @
52. #endif
    $ A. z) C3 s6 i1 f% L
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    * ]. A& z$ [4 v  ^
55. #define STATIC_SHIFT                3
      k! |9 x) N+ ~  k
56. #define TCINTEN_SHIFT               20
    & I$ P& m) D& f$ \+ K3 x) |2 A
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    , F# {" s7 K' |5 a/ g, U8 V4 \& S. b4 y
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    5 |$ `' w8 T  o* T1 ?. x2 u" o
62. static volatile int irqraised2 = 0;
    ) p. I9 ~' ?3 {% k
63. 
    ! f/ q9 ?3 s. p9 p. f
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 v) a+ M) O( ?0 I  h
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);
    
67. 
    # `0 }" O! y5 K, v
68. dma_addr_t dmaphyssrc1 = 0;
    ) P! g7 N1 \* u+ w$ `/ L
69. dma_addr_t dmaphyssrc2 = 0;
    * b! [7 F$ L5 P3 L! y. f
70. dma_addr_t dmaphysdest1 = 0;
    # j( T$ n% Z! K. w  q3 p
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ; K9 S' S7 y  D' u8 P
78. static int acnt = 512;
    % F& K( \9 \0 j: `4 J4 S
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    ; m- H0 v; g$ X8 p
82. module_param(acnt, int, S_IRUGO);
    3 I! t( o4 ~( r" ^3 w$ \; r
83. module_param(bcnt, int, S_IRUGO);
    " U% c. m7 T) @& t( p
84. module_param(ccnt, int, S_IRUGO);

复制代码

( r3 J' R" p+ V8 \      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
6 i, w  O; o: j1 narm-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。
. U- ~0 W* b' z" M. `% ]