OMAPL138如何在Linux下使用EDMA3驱动

yyj

/ r4 P- h7 m3 |

1. [code]EDMA sample test application
   3 _- C; @7 R( W' P5 D
2. /*
   / r. `/ a) K4 [. n% d
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   5 M- p6 U4 u0 h& c5 U% O
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   * ]( j) o! s/ T6 x
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   7 ~1 h/ ~0 s# [7 ^3 }! S
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    . @8 |, R: J( A
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + I2 h$ A# B5 p. c5 G' y0 g. x
14. *
    
15. * This program is free software; you can redistribute it and/or
    % k- L) U3 i  C6 l$ g/ `
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    : y8 Z0 I; D: t% S/ M- M7 E/ v
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    7 [- d4 F& r: F$ i- u4 v
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    + l; w( [$ j, ~7 @
22. * GNU General Public License for more details.
    
23. */
    
24. 
    ' A7 r% b& p. ?) A4 i6 B
25. #include <linux/module.h>
    3 v) u2 Y" H, w" Y& P* `
26. #include <linux/init.h>
    4 P" U4 R; [: D% f4 _
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    / k- K' X7 y$ g5 i% ^
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    . X. n1 d! X, ]$ }( r" B' f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    / ^" d8 j1 P( t( `% f, M3 [/ \
40. 
    0 Q+ i& m' Q1 F) \
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    2 N6 H, v6 {- s; _; B8 s0 Z
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / H' W5 D' v9 z* h$ b( p+ r. p
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 i; ], F2 s$ B: p
48. #else
    ( R2 S7 i: D* z& `% c
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    " x! Q4 X% g5 o3 z
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    + W2 ~! {8 ?9 {
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    2 S$ m, W/ ?# |' r) D3 a
58. #define TCCHEN_SHIFT                22
    0 n( V& {* a" g. \* W& I
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    , @9 E) m0 k3 d" U5 X9 H" v& F
62. static volatile int irqraised2 = 0;
    
63. 
    0 B) q. o& T# Z! r  L& w( O+ P
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);
    
67. 
    , O% i" y, g0 |6 u5 l- X# ]) v
68. dma_addr_t dmaphyssrc1 = 0;
    2 p, u- c$ f1 Y% E+ e
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    # N* p1 ?9 N: y
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ( k" l+ |" e5 Q$ v3 R
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ' C" ?& H$ Z3 C: ^* h
76. char *dmabufdest2 = NULL;
    0 l; L% M" X1 s+ c  ?- i8 R! W9 E1 _
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ! o6 L' M3 [$ {
81. 
    
82. module_param(acnt, int, S_IRUGO);
    8 [8 F7 p/ v% M# g9 r
83. module_param(bcnt, int, S_IRUGO);
    , |3 K0 f& P& F& P3 j
84. module_param(ccnt, int, S_IRUGO);

复制代码

: F- r% D6 F# Y6 q! F
      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
: A6 N/ N7 l6 m7 h" s, e  _$ Marm-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。
. U' j+ J" |: E" @, s, p6 F     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

! w2 Z1 Y9 J2 N% ~# w
) O2 \* j. o/ h7 @