OMAPL138如何在Linux下使用EDMA3驱动

yyj

  d$ x9 k! E1 s1 ]5 N: _' n, S

1. [code]EDMA sample test application
   3 y/ X) k! y5 r. n; k2 C
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   / W/ V( a" S' s; S
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - e5 d$ H+ n  X' ~! A+ c; A* V, D
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    6 N1 b4 H( c# u% {# H  t* m
11. *         TO CHANGE.
    3 f* @- l5 o- F4 z: o- I' o
12. *
    8 J6 h; A. s7 t  o. w
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    4 D& J; R4 c/ ?6 r
16. * modify it under the terms of the GNU General Public License as
    * L. F$ f5 z0 [3 z' y; m  ~2 r
17. * published by the Free Software Foundation version 2.
    6 C/ b( b! Y; I& m8 W1 G9 D, f- o
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    1 x9 i: a8 r2 l& E0 P; p
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    7 ~  ~) G+ [. y& Z7 t1 t6 |
23. */
    
24. 
    8 m2 c6 [% k% a) P
25. #include <linux/module.h>
    : ^1 g* u. O8 ^# t6 H( w6 S' ]4 l
26. #include <linux/init.h>
    2 m3 j: z4 {! N; d% g
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    . j: l5 i7 G$ ]1 q* B" h5 ]' \8 K# O" ~
29. #include <linux/interrupt.h>
    2 Y' E! d4 V; Y/ H
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
      B; U% J- A2 j; H: y/ J
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__)
    0 u* E" F! H0 H0 }% ]& t
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 O8 c# L) V3 M7 P/ L4 X
48. #else
    
49. #define DMA_PRINTK( x... )
    ( {' O: [9 p0 ]1 c8 _' _0 Z
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    9 Y5 `8 n5 H. Y3 _/ c  V  ~
56. #define TCINTEN_SHIFT               20
    : T, G. n5 F5 {! s5 I
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    $ F: Q& Q) j/ y
62. static volatile int irqraised2 = 0;
    " @& k9 v! g8 p+ D
63. 
    ; a- {5 {  g) z! }# c, U% i1 L
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. 
    . h- [7 {7 y( ?+ _* {; w8 t
68. dma_addr_t dmaphyssrc1 = 0;
    , H% V) d+ i* V  \: M
69. dma_addr_t dmaphyssrc2 = 0;
    ; ]1 r. a. }+ f; [& p* i; m
70. dma_addr_t dmaphysdest1 = 0;
    + V7 s. l) J& x& ]# [7 X
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    : o: G. x' \5 m. G
74. char *dmabufsrc2 = NULL;
    8 M) _( i, W) m1 Q$ g9 O! H% W
75. char *dmabufdest1 = NULL;
    % p, w! M7 v) c! I0 v0 }
76. char *dmabufdest2 = NULL;
    2 R3 [$ C& a; U5 d; g6 w
77. 
    7 z+ V  s& R& a
78. static int acnt = 512;
    9 z$ N' r2 y0 [/ r# {( d
79. static int bcnt = 8;
    ; k# L1 e% s5 W# r3 A. U
80. static int ccnt = 8;
    , ]& L5 H! \8 M7 \
81. 
    
82. module_param(acnt, int, S_IRUGO);
    1 L  ~: D: J& |; C% @$ O
83. module_param(bcnt, int, S_IRUGO);
    $ S2 X2 A6 I) L: Q/ S7 F
84. module_param(ccnt, int, S_IRUGO);

复制代码

. s5 I# Y& V+ [7 f) M/ B  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
( o/ M9 a, d& Q( w9 a7 h% Earm-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。

) t( X! r0 d+ n- W# I