OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   1 d" y: K. Q$ v' C% e
2. /*
   
3. * edma_test.c
   # C( j  [/ `0 l3 U3 h' O; N
4. *
   
5. * brief  EDMA3 Test Application
   : L$ S( G$ L) ^% d" w4 V4 M9 e1 ^: u
6. *
   9 c  g2 v. C  |# T4 k
7. *   This file contains EDMA3 Test code.
   * ~  C1 P" z( k; r  e
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
    ; e8 `  U6 g, Z1 d! [- n1 _+ w
11. *         TO CHANGE.
    
12. *
    8 i7 I. }" M6 q: @. b/ N
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
      m. O/ i0 g3 {2 r- K, `0 r
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.
    , h) V6 r2 h. m! g
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ) p2 u2 k) `6 U4 Y7 u+ H* H  |
20. * kind, whether express or implied; without even the implied warranty
    ) _/ t- k7 }  h4 j
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    8 j4 v2 Y' K, g% k2 G* b0 c
23. */
    
24. 
    
25. #include <linux/module.h>
    * W8 P7 {+ z& `" `9 Z
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    0 f5 G' {$ W  x7 t; ~
29. #include <linux/interrupt.h>
    $ v* N& f. s% ]" f8 o
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    2 S5 o3 g; y$ |; _
32. #include <linux/sysctl.h>
    ! f0 \) a1 o1 f' F! |
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    4 R6 ?. D3 C) Y* a/ S8 r% G
37. #include <mach/hardware.h>
    9 x7 u+ h9 u8 R4 `
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    0 h. ?1 z1 W# F; ]
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    0 T. V3 n- `: `. }9 q6 C. U4 U" ^
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__)
    ( x7 A8 O  p# e1 J; ?# m
48. #else
    ) W8 O- o$ l$ i' m
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    - Z! N" x4 H! u2 m6 V
51. #define DMA_FN_OUT
    * V/ o4 h0 t' U
52. #endif
    ( P1 N! i5 V4 h- P6 B$ H
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ; W9 i" A  n* T5 u* C/ s/ `
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    % r% Y% H- b( E$ R: W- A
61. static volatile int irqraised1 = 0;
    * i" A' x( ]. l& w; I
62. static volatile int irqraised2 = 0;
    9 s9 S4 v- e+ X3 {) g% x8 U
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);
    % I1 n  U6 b3 N* ~2 U+ k. j
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    7 K2 t. p! B  ^# J
68. dma_addr_t dmaphyssrc1 = 0;
    $ [' {' S: D: E' x
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
      _1 w3 b/ o4 O9 \8 Y' j
71. dma_addr_t dmaphysdest2 = 0;
    8 E) m2 g; ?+ m/ E6 v
72. 
    
73. char *dmabufsrc1 = NULL;
    3 y% f- L+ L7 U9 P
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    & Q9 Z( u2 C4 G
76. char *dmabufdest2 = NULL;
    
77. 
    ( T  ^# y+ p3 a3 I; L# Z
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    9 i4 T" H  o8 o+ O4 o: i
81. 
    
82. module_param(acnt, int, S_IRUGO);
    9 B: K# J- b1 t4 j" y4 D
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

$ g1 |* C# V3 R! v
( i) f/ [; N2 m# q7 B      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。
5 M2 }& |5 C4 T. l# `     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
" C* n3 o+ O/ v( K4 M+ C