OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   8 U' R# P4 N; I: l& D& b, P
2. /*
   
3. * edma_test.c
   0 _3 G3 J  Y2 }3 {6 d
4. *
   
5. * brief  EDMA3 Test Application
   . K* U1 Y0 y2 j( M+ B
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    ( p, l# b; c2 d' U# q3 m) k: C, M0 p" C  {
11. *         TO CHANGE.
    
12. *
    # f0 _+ ~. I- F* U
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    2 A$ R. p  ?' y/ J" }
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    0 x# t- ]0 A( Z1 q& `
17. * published by the Free Software Foundation version 2.
    
18. *
    1 c9 H. {6 N8 J1 J
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    / [/ w6 Z. t" R. y. l. z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    : J7 a3 O, b; \! e0 h4 g! s
22. * GNU General Public License for more details.
    
23. */
      G6 p  w# {# W8 O0 L
24. 
    6 a* a& L* }- Z
25. #include <linux/module.h>
    * u) l* L" s4 a* v" @* B- Y
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    7 K, |7 M- E( b/ Y; Z0 _
29. #include <linux/interrupt.h>
    ( S% B& e3 u0 x. v8 e
30. #include <asm/io.h>
    2 G( ^5 P, I3 `; ?" y0 L4 s  Y
31. #include <linux/moduleparam.h>
    1 q* m# {6 i) X4 u8 H
32. #include <linux/sysctl.h>
    * D- r7 L: |8 Y/ ~6 w( \9 G
33. #include <linux/mm.h>
    ! t* w. Q2 `+ {: [4 [) X
34. #include <linux/dma-mapping.h>
    
35. 
    0 _: G$ i! l3 u! U# }6 {
36. #include <mach/memory.h>
    3 l6 C, z6 Q: k" i9 A( E
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    # U5 q: A6 W% @! P$ A3 z4 F
40. 
    
41. #undef EDMA3_DEBUG
    0 E- ~7 `* a4 l. @
42. /*#define EDMA3_DEBUG*/
    
43. 
    . K& W# |# ^( C$ u
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
      [  z: f6 w4 y4 `
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    . L) ~' o' [. d# x% N% p/ H
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ; H, C5 y  N) |6 f8 Z+ q9 p7 b, L: Q4 y/ o
48. #else
    
49. #define DMA_PRINTK( x... )
    2 T; ?$ \* H1 ?2 M# a1 i
50. #define DMA_FN_IN
    ; M; _0 P" X; Z+ n
51. #define DMA_FN_OUT
    8 v! C; U1 H9 T, M! ]/ w5 Z
52. #endif
    ( j7 |1 C3 s1 e% \; L4 w, `3 ^- y
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 |0 n7 g6 b8 b% B" s
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    , N* B  k1 Q$ q4 p8 w; Q; G& M
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    1 @/ U7 R  F) H  o- A% p/ P
59. #define ITCCHEN_SHIFT               23
    
60. 
    3 ~* y4 u! B( i# ?7 T3 O
61. static volatile int irqraised1 = 0;
    0 y" u1 c% h+ ?  u
62. static volatile int irqraised2 = 0;
    
63. 
    ( ^, ~0 T/ Y! _) |
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & }9 P. D- P& T% i) L8 [
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / ^; _" O& g3 @
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    , |7 \8 A/ T: P; M  @( V
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    8 g( O& N: w+ `# Y4 U8 _
74. char *dmabufsrc2 = NULL;
    * ~' w" h2 x- O. H) `! X- {
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , n  N  @2 l/ {$ v  s& k
77. 
    2 j$ \* }3 `& k, h9 H% f: r' R
78. static int acnt = 512;
    1 E* Y8 W  a/ K9 m
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    $ F; ~# ^6 ^2 N6 `
81. 
    & @  ~$ c7 L9 e, D5 U9 }
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ) q  A) J  E! B9 x6 l  D
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
! n3 z' v- g9 W1 b* s2 a8 Sarm-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。
0 O0 t& q  o/ F+ r8 N     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
" s2 `- z: Q0 y7 N9 F: R
, Q6 B! z1 O6 o/ t# L  P