OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ v' t! U1 J4 |" U; j

1. [code]EDMA sample test application
   7 V, Q+ X+ Z) J% P5 l& ~
2. /*
   ; ]  v; G$ [" P# w' j* t
3. * edma_test.c
   , p) X7 L+ n4 O. Z
4. *
   
5. * brief  EDMA3 Test Application
   # P  E, X% p5 i" x- L" S; c
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ' ]* U) k$ G. f' T5 ?+ L! ?: y
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    # X9 I1 z4 q4 Q% o" ^$ e
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
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
    9 C+ X. r0 x3 a7 Q1 T. y4 X2 a
17. * published by the Free Software Foundation version 2.
    ! c1 a  K6 n0 S0 ^
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ! Q8 g6 I. z* K; J% W: D
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ( n3 T- s" R, |. j0 ]. X6 x" _) S
22. * GNU General Public License for more details.
    
23. */
    ) t3 r1 l8 H* z8 I' |+ V9 z6 i
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ( z. j" G; M2 [& I+ I9 @
29. #include <linux/interrupt.h>
    3 M9 N3 q; M" N8 r5 y/ V4 R
30. #include <asm/io.h>
    - V3 s$ j' M& G  T) d
31. #include <linux/moduleparam.h>
    7 ]& d2 T  |8 [
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    3 T# y, E% q9 k0 C0 ]8 ?3 X* A
34. #include <linux/dma-mapping.h>
    
35. 
    . R: |9 x( |% a1 ?5 f% x7 r
36. #include <mach/memory.h>
    , v! v- s; R. p7 u7 L( }0 M9 J
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    0 Q5 `5 a" x9 t6 C* ?* T- V9 `# E# N
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    * ^1 ^: `* Z4 z5 G7 S: V6 S1 K
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    " s+ q; R" p/ b1 y
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... )
    + c, `/ @% U' @+ c
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 A2 `# Y  a: O+ C
55. #define STATIC_SHIFT                3
    6 Q7 j$ X% J7 U9 [& z' X3 H8 |, z3 k
56. #define TCINTEN_SHIFT               20
    ' i# T) L# I" v* m' W* _
57. #define ITCINTEN_SHIFT              21
    - O9 v& p% [8 q" e! B
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    1 S" R4 U3 S  L. z8 p# N- f
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ; y% f) e6 |& j. g- 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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
      h1 V$ }8 Y5 L" U6 l
69. dma_addr_t dmaphyssrc2 = 0;
    1 ~; P+ X/ j- X. }) Y8 t- b
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    . ?- G4 k" u6 Z5 j( p% R, [9 u
74. char *dmabufsrc2 = NULL;
    1 v6 _4 A3 R9 F6 \, i
75. char *dmabufdest1 = NULL;
    , H( ~' k8 i! o+ u* y, R
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    6 j& l9 m/ A9 c: Z. S
79. static int bcnt = 8;
    4 \% b8 R% N, u# |% T! x
80. static int ccnt = 8;
    
81. 
    + e5 j* G- C& j; Q+ k& E& s
82. module_param(acnt, int, S_IRUGO);
    & }& a2 k5 l6 H' R6 c: ?0 I
83. module_param(bcnt, int, S_IRUGO);
    
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
! t+ f! Z/ l6 h0 E8 warm-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。
& q# x9 |1 v+ H& j     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。