OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   9 h; \3 |. v) F4 o+ g& `8 |
2. /*
   
3. * edma_test.c
   2 c& d& d5 t7 D/ ]2 G7 Q& X
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   3 b) \: T& j- R% y  u; U7 f2 }7 G! M" Y
8. *
   " J: Y" J. Y6 S0 y: p: t
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
    : o! ^- K# ~8 W6 h% A
11. *         TO CHANGE.
    * J9 _  [7 c$ i2 ?+ s' H
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    7 [0 W6 O% n4 y1 T
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + W( }" X( t- S5 E& n7 |
20. * kind, whether express or implied; without even the implied warranty
    8 M4 q# U5 ~  D' @8 Z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    : X, y7 I9 u+ e/ K% _
22. * GNU General Public License for more details.
    % o- n8 p% z2 d' s! R8 w3 ]% S
23. */
    7 `8 z" b3 Y6 K6 S( F5 A
24. 
    ; B3 }9 u2 [; X* [# A# ~
25. #include <linux/module.h>
    4 t1 y2 d0 ?5 X) {
26. #include <linux/init.h>
    $ m8 ]9 d) K3 S7 X+ _# I) ~! D
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    - a9 o# O1 K6 h; h7 m  a  {# B
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    * l. s% h/ D1 S" W# b5 {6 f8 e
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 F4 ?# Q# }7 D- t
33. #include <linux/mm.h>
    - p, M! M: i, v+ ^- U
34. #include <linux/dma-mapping.h>
    - o6 L: T& B, q- N4 u9 q
35. 
    
36. #include <mach/memory.h>
    ' G8 \% i* Y0 B1 ^" o- y' `- [
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ; \  j2 a5 a8 T6 [  h6 `
39. #include <asm/hardware/edma.h>
    7 h0 `8 i7 T* q! [" s- e1 `: w- e
40. 
    & N- I6 f, f8 ]  W5 w
41. #undef EDMA3_DEBUG
    1 Y+ a8 ~) B$ B; V/ x$ |
42. /*#define EDMA3_DEBUG*/
    
43. 
    6 N2 K/ k/ H$ c4 p4 v8 o
44. #ifdef EDMA3_DEBUG
    4 y4 c, U& F( v5 Z6 i* w
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! M1 x2 I' ~$ `- i8 o  L
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    / p7 X* h$ n1 Z5 m# O1 z  n6 P4 W
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    " @# R. }: V6 ]0 A0 O9 n
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 G; Y, Q3 X' k; [0 O) A; e
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
      V/ [' v7 ~! B) V
57. #define ITCINTEN_SHIFT              21
    9 z: Q0 G5 s; ~' c8 x# @9 I3 m
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ! t9 n4 w' S$ u, |
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;
    . P0 b8 p9 E+ v. [/ r+ O
69. dma_addr_t dmaphyssrc2 = 0;
    # O+ D+ l5 T8 M
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    & }/ g' {/ b# D* B5 r8 ?, V; Z
72. 
    6 A% ?& g" l$ }4 `" O3 R8 z8 p
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    7 O8 G$ H3 ^) j2 u$ D
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
      d9 p1 m4 e# m3 E% T8 I
80. static int ccnt = 8;
    
81. 
    & A" N. `7 a, p. z4 J3 ~: s
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    + r1 b/ @8 [- b0 N7 J. q- E, F
84. module_param(ccnt, int, S_IRUGO);

复制代码

8 a; h3 C) \- d3 X4 W
/ U0 D* `" c$ u" d% 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
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 x# F) z5 }$ J) P& H1 o     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
5 K3 x! f4 k# D6 K2 N7 O- |
, d3 _$ {- f. c) C& E