OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   8 M  b( @6 v6 _1 y! c7 U/ S
2. /*
   : S3 p0 @5 \; I/ y" F/ t' `. j' D
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ! \7 m7 l* b: b; H" V
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
    
11. *         TO CHANGE.
    
12. *
    8 `8 |/ a. o9 A) u- l0 t. z. n. s
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      H5 ?, i/ O6 j! ?0 U2 E0 u8 b" m
14. *
    
15. * This program is free software; you can redistribute it and/or
    2 t, l! Y. l7 d( |$ K
16. * modify it under the terms of the GNU General Public License as
    8 n6 E, t: M" z
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
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * o4 s" |% A& m% `
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    4 R/ L1 ?9 k+ Q
26. #include <linux/init.h>
    2 t4 c  H% ]. i
27. #include <linux/errno.h>
    3 z( _0 l# E  Q: |) q" @2 t. h, n
28. #include <linux/types.h>
    0 M/ S* y1 G$ I8 m& e( J: e8 w/ G
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    4 ^, s9 v# I" q1 e2 @$ i" ^* \
32. #include <linux/sysctl.h>
    5 B. y/ M( N0 L# ^+ U4 T; P9 C" i
33. #include <linux/mm.h>
    - ^  z# {7 W; @# }  {/ R  W5 }" W
34. #include <linux/dma-mapping.h>
    
35. 
    5 h6 Q& X2 w) J# ~/ y
36. #include <mach/memory.h>
    , L' E, n4 g9 L* S; N' y
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    $ a2 y+ m. a8 h% n
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    # }, Y% M; N$ s$ {
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__)
    . `/ v+ u  a3 U$ Q: h
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    / X- Y' Y- S3 ?. I* P
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    5 f7 t- t4 j" P8 i, Z2 p2 b
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) o5 K: O1 U8 d# j# {+ S! N. S: N
55. #define STATIC_SHIFT                3
    - Y7 Y" ^& E9 P& [5 N5 W8 V, ]
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    $ B" T: }- z2 g/ c$ E
59. #define ITCCHEN_SHIFT               23
    
60. 
    / j; d, _, q  |
61. static volatile int irqraised1 = 0;
    " s4 U5 s6 K7 ?8 e; U
62. static volatile int irqraised2 = 0;
    3 F' o! n* I) F+ F
63. 
    ( g+ h1 \0 C. {
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : m! k3 x  i5 ^& B4 b. r; h6 `5 _, |
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. 
    8 z3 H" u  @% A
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
      H% l% _% T, G
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    3 H/ j$ L( L4 ]
73. char *dmabufsrc1 = NULL;
    ' c7 D; |$ n3 C6 A) O
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      w& E: Q! M/ A! D/ m6 ^
76. char *dmabufdest2 = NULL;
    
77. 
    3 D8 @- T) w& T4 l) i
78. static int acnt = 512;
    3 K4 A0 l9 z- \5 C0 C+ s8 F
79. static int bcnt = 8;
    ! \0 C& b6 {  V( \, f: g
80. static int ccnt = 8;
    1 F( F, W. c/ L# I
81. 
    
82. module_param(acnt, int, S_IRUGO);
    # m& n  O3 @+ I
83. module_param(bcnt, int, S_IRUGO);
    $ }! S6 J( J8 q; ~9 ?' T9 F
84. module_param(ccnt, int, S_IRUGO);

复制代码

( [( `8 L$ W8 `3 ^4 _      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
! e  Q1 O' P* U% r/ h! e9 harm-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。
: s$ Z0 q& d$ F0 e  n9 n) O! l5 I