OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   . _% {6 k  i8 Q8 x" M9 q, q
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ; Z* g% C: J9 R: J$ X% f0 f
7. *   This file contains EDMA3 Test code.
   4 r9 n$ ~7 q* l- l; x
8. *
   # h8 H, v0 C- s2 ^. Q7 I; 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
    ' Q7 U3 q5 u+ a( Q# X- t6 S" L* E
11. *         TO CHANGE.
    8 h8 s/ ?; M, u& ~
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    " v' D; `; K% v- t! `
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    - d3 O$ T5 e8 g( V% H
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
    ; T; _! u. l0 i/ \3 V& ?
22. * GNU General Public License for more details.
    9 g3 u" y. |7 I+ {+ c, ]6 m/ Y' H0 G
23. */
    # \$ x2 }, {6 ?4 }  H2 h* K
24. 
    
25. #include <linux/module.h>
    3 c1 |3 C2 c8 I3 j: C, O6 k
26. #include <linux/init.h>
    / M, L# F' j% Y* _4 h3 {# [
27. #include <linux/errno.h>
    & b& C7 d# U, O1 J; Q8 h# x3 u
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
      {/ f' q1 q% X! r3 R9 @
30. #include <asm/io.h>
    8 h0 m2 X2 p! t4 K8 ?
31. #include <linux/moduleparam.h>
    " Z2 r5 k( ?+ j
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    $ ?9 ~; e) P' B; g
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    4 |) f+ o6 d  l* }# U0 a
38. #include <mach/irqs.h>
    4 Q- j+ g9 @3 t1 F/ p
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    * e, f, u8 P* Y5 S  U
42. /*#define EDMA3_DEBUG*/
    
43. 
    5 ~: \. @! H* ~
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! S. X, H) ~; @3 r0 m
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
    4 I# c1 c! @4 b
49. #define DMA_PRINTK( x... )
    % h, N/ x, I8 q8 _" `  t
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    / z. S# O2 V- |
52. #endif
    - B; J/ X0 c+ e+ s  N1 Q9 K# ?
53. 
    2 h/ K6 C# U: Y/ C! V
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / Z# l5 e; R0 O! P
55. #define STATIC_SHIFT                3
    % P; h9 ]0 x! t% M0 A( E
56. #define TCINTEN_SHIFT               20
    9 k2 [3 H) @  k4 C
57. #define ITCINTEN_SHIFT              21
    7 N% U, K. `( n$ R
58. #define TCCHEN_SHIFT                22
    8 R9 e# [  ]3 @$ z. J2 p
59. #define ITCCHEN_SHIFT               23
    ( H7 O* D3 R- z% |
60. 
    ) V) ?1 y- y. Z
61. static volatile int irqraised1 = 0;
    ( h/ R  ~/ Q# q% `2 U
62. static volatile int irqraised2 = 0;
    + S; A0 d" Q$ ^( |) g* G
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) p: A+ o: l* j$ a  y: I" k
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. 
    % Z/ ^# E2 b2 v2 P/ k
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 ~. ~% n0 |8 p3 @! m
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    , x/ {0 M0 W5 d6 |
73. char *dmabufsrc1 = NULL;
    ' e; d: Z. p9 S9 |4 D/ ~" Y
74. char *dmabufsrc2 = NULL;
    * o7 @6 s1 D2 R9 }3 F2 w
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    + v# x4 M: n9 L, b& R) f5 i
78. static int acnt = 512;
    ; N! S8 i: C; A. z+ v6 I, t
79. static int bcnt = 8;
    / h) v/ U8 h. V) ~
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ) x5 @7 o2 H" O. ~" B, B" A
83. module_param(bcnt, int, S_IRUGO);
    $ L' j( _! [# L% Y, O; C+ i  B
84. module_param(ccnt, int, S_IRUGO);

复制代码

) c+ P( x: l+ n. [9 V$ h" n% c      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
arm-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 e8 U9 C' \4 T     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
( }  [. ?" T( t6 O7 ?
  n4 u& b( E  W$ j" [/ z
8 y. S; m: H$ ^3 X5 ^2 q