OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   9 Z& ?% n/ h$ ?
2. /*
   
3. * edma_test.c
   4 `# _. @$ m7 K3 s
4. *
   2 o! H9 W2 B7 o8 Y2 x- @
5. * brief  EDMA3 Test Application
   7 ^! d# B2 A% \+ K2 o
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    ) Z5 m  O& p; Q( P! o/ V
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    . }$ R6 C! w3 ^& ?7 r- V
15. * This program is free software; you can redistribute it and/or
    ; ]" F# P' Z) k. Z" S3 O; u
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    & K2 `* u* \* n2 p  V
18. *
    2 Z' W8 w8 v" G% n6 L5 ~3 |0 O
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & Y5 p* u; p) w* {! j6 b
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. */
    
24. 
    ; t; k9 ]" a/ w: b6 ?2 y% e
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    . ?4 r7 I. }  j
27. #include <linux/errno.h>
    ; p* [9 O+ g4 G$ T/ `
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ! s' L3 ?+ J1 k1 {: e
33. #include <linux/mm.h>
    3 h( t5 m4 ], M' {
34. #include <linux/dma-mapping.h>
    1 \5 \& ?: R2 F5 U
35. 
    9 y1 N" L1 C$ m( |9 }
36. #include <mach/memory.h>
    ) h. o9 x' t' \
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    * A; r7 E  B7 @3 g1 h
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! e- N) {7 U0 e$ l  W+ [6 w
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " o1 Q( }! w( Y/ L7 e3 l( H" r3 p
48. #else
    : m# n% V, U) G  D1 ^  P  v  ?+ i
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    , Z0 @: V# T, Q9 J
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    : I4 d# M/ [* q) f$ P6 w8 \5 _+ ]
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    7 I+ z6 f% x) w+ f  D
62. static volatile int irqraised2 = 0;
    ' H/ B% J2 W1 B
63. 
    
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);
    & H2 [0 G5 r+ S! {1 p. _8 i9 j' r
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 H9 y$ R3 b6 ^. {; O
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    8 ^/ {, V! K( s7 b- X, l* G. o
69. dma_addr_t dmaphyssrc2 = 0;
    4 u+ x4 I( A/ W8 a  q: A
70. dma_addr_t dmaphysdest1 = 0;
    + s) k  z% Q' g' U4 m
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    % `& Q9 P8 w8 ~" u2 k6 s! ^
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ) e! W, [* ^1 Q: x6 [  e2 R
77. 
    
78. static int acnt = 512;
    : d1 N. A9 e/ O2 `
79. static int bcnt = 8;
    % B0 k$ m5 J; Y
80. static int ccnt = 8;
    * n+ C. B1 K- W0 D
81. 
    
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

' h  c3 v/ [; I: u3 Z) T      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
4 e+ d$ T7 F9 H) S3 P. P9 v+ z% w
7 s! M5 r. d% c2 Y( E8 t! z