OMAPL138如何在Linux下使用EDMA3驱动

yyj

5 K; k! E1 h: L" x( k

1. [code]EDMA sample test application
   . j9 A8 ?0 H/ M2 d. ~
2. /*
   ( H  E/ p6 N3 U9 X' x* N/ D$ r
3. * edma_test.c
   
4. *
   : E) o7 F) r5 |0 z) h
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 |0 ?2 Y# [) S- F8 Q5 W
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    " a6 c8 v" Z5 y( F
11. *         TO CHANGE.
    
12. *
    8 R, b. ^' Z/ i2 l1 h
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ) m1 v6 K5 F1 y' g9 u1 Z7 U5 L
15. * This program is free software; you can redistribute it and/or
    0 L( A# E# B. R1 E9 b7 m2 j) V
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    5 M$ p! v: c9 ?* N
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; B* d. N9 h( T# J# R
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    0 ]: z- e) J" N* u
24. 
    
25. #include <linux/module.h>
    5 E, n, k4 K' L
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    3 W8 Q, O: h1 a
28. #include <linux/types.h>
    " {  N+ S/ {/ H" `, |7 l
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    / Y1 x+ Q- x6 t. ~3 k, }+ N: ?
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ) a; b" j9 G  r" ]* j, F0 b  {
36. #include <mach/memory.h>
    ! F7 S; ]( `2 o4 {- \$ q/ u
37. #include <mach/hardware.h>
    8 T& S* z% ]# Y) |7 w
38. #include <mach/irqs.h>
    ' b/ W" {8 }1 w( R
39. #include <asm/hardware/edma.h>
    0 v, w% j4 }/ r5 q  Q7 M; x
40. 
    - H- B, s2 d- ~# ]
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    # }1 x$ \" F) f7 W
43. 
    
44. #ifdef EDMA3_DEBUG
    8 |4 H9 l! [) t
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    3 `7 {" x( }, l0 ^# c$ A
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ! n' ~- f7 T' ^; s, V. e" N
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    % _; q; ?, V4 }: F  K
49. #define DMA_PRINTK( x... )
      K: A9 }6 a) }$ k3 q% t* e4 F
50. #define DMA_FN_IN
    ; w2 D' r3 {: K8 J
51. #define DMA_FN_OUT
    
52. #endif
    7 F/ r+ G0 N# E; n
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
      @' w1 s4 ?# ^2 e4 s6 j+ H
58. #define TCCHEN_SHIFT                22
    & R# p7 k: W' r* |# L" R
59. #define ITCCHEN_SHIFT               23
    4 P/ k0 p' H( R  J6 i# p
60. 
    
61. static volatile int irqraised1 = 0;
    # V7 t' J' K$ V( A
62. static volatile int irqraised2 = 0;
    
63. 
    # W# `5 V9 V- }( I2 I" ~* N; J3 F6 h
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);
    $ p0 a: n/ Q+ g% g
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;
    : b: X( p, a; h) [0 g+ I! Y
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ) l1 k7 }" W5 N7 H; d
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    7 N% o5 E4 C$ I$ B' ~" X: e3 G
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ( {0 p. c1 S7 Y
78. static int acnt = 512;
    8 D; P, m3 x( d  ?
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    7 a: h% h, |6 i4 S8 u
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

, {: I+ L. s( v2 B4 A# N: o: d6 s
      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
, `, k: s8 ~+ E! rarm-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。


1 N+ Y! Y. C: e  d# K* m' a0 r