OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ( ~7 J" M; W- U( y7 t5 ~- [$ S
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   4 j8 p. y3 p9 Q$ G9 O- ?* c( E
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   & |+ G3 S3 K2 [" `3 }  w4 S7 l+ Z# W
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
    1 t$ ~5 T% E  x! V4 ^+ @+ [
11. *         TO CHANGE.
    8 k# g5 i4 J7 j" j; E
12. *
    3 m5 {$ O8 C3 E/ k" b
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ( ]+ D# Q; j, e  ~( M5 z, |. ^
14. *
    
15. * This program is free software; you can redistribute it and/or
    , i0 B5 o" |1 X6 c- Y6 \- L
16. * modify it under the terms of the GNU General Public License as
    ; l6 Q$ i  {/ R' O! x3 d
17. * published by the Free Software Foundation version 2.
    
18. *
    " E( |0 d9 v# H; {
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    $ T( @/ X; K, Y( X
22. * GNU General Public License for more details.
    
23. */
    
24. 
    1 [& {" y% c5 A8 R5 N" p& [
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    # @/ _8 o7 G* |1 P! Y0 B
30. #include <asm/io.h>
      i5 n  r7 c2 H( r8 v
31. #include <linux/moduleparam.h>
    . q$ Z$ ~) s* e9 ?# ?! b& a7 ]
32. #include <linux/sysctl.h>
    4 g! G8 Z' _! J' p! c1 |3 B" R, Q4 v1 h
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    & z% ~- F7 M, {' f/ B
35. 
    
36. #include <mach/memory.h>
    ' k& M, @$ c* |) o# N
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    2 ]- A3 P& s5 d! ~/ R% K  ]
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    $ c" b  j- B1 i7 {% S5 t9 p
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ; ?; U# x, K9 V1 ^* D1 g1 _8 w/ |3 ~+ k
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 m+ [0 }! z: ]9 j
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    9 Y" `: r+ ]( v. ]. ~
48. #else
    
49. #define DMA_PRINTK( x... )
    - u3 e' @# F9 G
50. #define DMA_FN_IN
    # \% [' c* g; K) e, U% M
51. #define DMA_FN_OUT
    3 F$ _3 T/ w3 u) p9 D9 }
52. #endif
    4 q0 o/ d$ s" |# D5 F7 R7 \
53. 
    0 o3 _: f$ X. G) [( F: B
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    - w% p$ z3 F6 A) g2 ?
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    ! o2 U: [" M, T9 R! i" |2 y
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * q' y3 N, v, Q6 w
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 r# F2 r( {5 C* [+ ?6 h
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    * L! Q$ D* a# t9 I* ]; M* I
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    , |) \0 }7 o% I. E' v; ^( t
75. char *dmabufdest1 = NULL;
    ) y" A# }3 I4 c0 y! n8 ]
76. char *dmabufdest2 = NULL;
    
77. 
    ) y8 o% j6 L0 r% z2 l: O* F. T3 z
78. static int acnt = 512;
    3 [0 K$ _9 G0 f. F
79. static int bcnt = 8;
    9 s3 s: g5 L* d* H6 T) I; X* f( v+ }
80. static int ccnt = 8;
    
81. 
    5 w* H2 [8 ~2 b& \
82. module_param(acnt, int, S_IRUGO);
    5 A6 M: l. G. q$ r. ]# a5 m, E+ b
83. module_param(bcnt, int, S_IRUGO);
    6 Q# P: _) {! _' C8 X
84. module_param(ccnt, int, S_IRUGO);

复制代码

% d1 a- [1 O# W2 P$ `
: ]( u1 T6 |2 o      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
& A+ d4 M4 c- E- h" S* xarm-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。
% i# y' M8 }2 d5 a: 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。
6 z- m& \4 B" [! b
5 J8 N" K$ j) E; S