OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   4 z6 X( t! L& [( l$ E6 t
2. /*
   2 Z+ P4 G4 T" l/ |
3. * edma_test.c
   $ m6 e8 p3 F& E/ G4 Q8 O: a, Q
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   3 {+ U7 h2 D: f' ?# }. _3 Z( p8 g
7. *   This file contains EDMA3 Test code.
   
8. *
   # J6 M0 C' e& H& L/ D8 S4 ~
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , z4 n# h- A0 W$ u
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    1 B* T$ L' d% U; @
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    - k: @1 D9 f+ i# e
14. *
    
15. * This program is free software; you can redistribute it and/or
      Q2 |) \2 j1 x% o
16. * modify it under the terms of the GNU General Public License as
    . U" \9 n+ U* z. x
17. * published by the Free Software Foundation version 2.
    0 W+ a' k* P7 N4 K' N
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ' |, U6 v) D2 t4 {: y" V1 g: Z
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. */
    + [% _8 G9 z2 E4 J4 X, C. {( `3 E) x
24. 
    
25. #include <linux/module.h>
    / {, u  {3 F9 Y# f- |
26. #include <linux/init.h>
    " S$ g0 ~' o; ^7 M8 G/ I" s  S9 l
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ' K5 x% L2 w/ C3 V# O- O# T* P0 c
29. #include <linux/interrupt.h>
    ; S( M4 o* i6 |5 Y7 j
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - l2 o2 s/ G2 h- u7 a# X
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    # c5 s4 @7 \: i% y/ w" {
35. 
    0 c, _7 Z* f2 V$ u: _! x- [
36. #include <mach/memory.h>
    * Z2 L; J' G. i$ c
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*/
    3 [; I, A: P6 ^$ d+ w! t  o; D
43. 
    
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    4 M+ |7 Q1 y8 E: M
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    9 U- g: p; x9 ?6 F6 T4 h7 t
51. #define DMA_FN_OUT
    
52. #endif
    5 f6 l- X6 F+ k; a7 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
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    - f+ ^0 H* ]2 m0 M0 H7 q  i
61. static volatile int irqraised1 = 0;
    2 F- X- ?( K! k+ x$ A8 q
62. static volatile int irqraised2 = 0;
    + E' a/ e4 h% d
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);
    ) U% Y4 N1 j$ W4 ~- Q) G
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; n. E, T: }; b4 p8 d6 \1 D
67. 
    / g2 V1 J; F+ Y  `$ W
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    3 r( L; y/ v+ W$ h" O
71. dma_addr_t dmaphysdest2 = 0;
    ) J+ l3 Y8 N; v& v/ r! D- J; L
72. 
    1 h5 p+ Z+ P+ v) F' ^
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    3 r% G1 S& ~7 x, L4 a. k' `
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    # C! V% n1 q: i
77. 
    $ z5 C/ W! j+ I: j
78. static int acnt = 512;
    
79. static int bcnt = 8;
    / V: e% [8 n1 a+ m/ K
80. static int ccnt = 8;
    ; Q8 t0 L. U1 o" w3 A9 |+ s- Z
81. 
    
82. module_param(acnt, int, S_IRUGO);
    - s" h* _' V( e$ B; l
83. module_param(bcnt, int, S_IRUGO);
    . c* X% Q+ S* B
84. module_param(ccnt, int, S_IRUGO);

复制代码

& s& c% E8 L, _) c$ z* b* k      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。
$ ~' y+ s$ L/ y: T+ |+ T/ |( r     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
7 Q2 P. P" m. Y8 R% O
8 m3 E: }5 o3 W; v- A: d