OMAPL138如何在Linux下使用EDMA3驱动

yyj

: D* u; J# d* G0 T8 v

1. [code]EDMA sample test application
   " S( B/ u! H2 ^+ V
2. /*
   % j) V9 l1 Y- v* a  a- Q
3. * edma_test.c
   * s, H/ S) y) _3 _
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 t& N: ~. E8 K7 I& T! N! L
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    : V" u8 M1 j* n
12. *
    ! Y8 j' r. ?$ f  R9 C) P
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 y# g7 A" C; d. n
14. *
    , ~" i- K/ ^8 W" l1 o2 u5 {
15. * This program is free software; you can redistribute it and/or
    , J: |' j' U+ X( S. N$ E) G
16. * modify it under the terms of the GNU General Public License as
    ( M, s7 _8 v& B! Y# G
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    $ x/ _# e" o, N2 F6 d
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    3 D. U1 e3 U' W* ]. B: \
23. */
    % ?' `8 d4 g& C
24. 
    7 M  c& r2 V" l7 Y; ]: l) {8 K1 U
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    4 b1 U2 H- `/ a) p/ B; z
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    2 n4 n9 T6 @" k, N" \$ k
30. #include <asm/io.h>
    2 H, C8 R( j+ h1 k" ^
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    . E0 [; w2 p+ B9 ?7 G; f8 ~5 w3 u7 K. {
39. #include <asm/hardware/edma.h>
    
40. 
    ) X* G  ?6 B# G. Y! e+ B
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    / t( s' X' e/ s* h8 Q
43. 
    2 E, H9 ^8 {% k( X# G
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    " D9 b4 n9 e( Q8 H3 Z, f. \: p
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
    & b# V) O0 j' v+ A  Q3 F
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ! z; r/ T- [; {; b2 U1 h
52. #endif
    
53. 
    ' B: @6 H5 h! [9 T0 h/ m" O
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    0 ~" b7 ]# f% V# J7 e- t+ d
56. #define TCINTEN_SHIFT               20
    2 F2 C, p1 x& z& `+ R
57. #define ITCINTEN_SHIFT              21
    & C" `- @5 L3 X" t3 u# ^
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    # e4 t( X1 M1 F# U
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
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);
    ! @- E: f4 A- d* `& p1 R$ L& x  ^
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    + \8 |% A+ ~3 s6 R6 p- r
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    2 R" E  j. W8 ^/ Y+ ]' ^6 N% U7 c
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    5 o8 J0 H* r: b3 m) x) t
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    * N8 v* u0 f: p; ~  J
73. char *dmabufsrc1 = NULL;
    8 S0 F. s# A& X8 L8 J
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ! _8 g: k7 o6 z) Y4 i
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    8 H5 T# }2 h- E
79. static int bcnt = 8;
    - ?- _3 N- Q" L
80. static int ccnt = 8;
    5 x- M+ L' T0 T. x- \: U
81. 
    
82. module_param(acnt, int, S_IRUGO);
    - W6 r/ n. n4 S5 d0 i, \. x
83. module_param(bcnt, int, S_IRUGO);
    ; e7 q/ D& t2 W& ~/ O! n: I- P
84. module_param(ccnt, int, S_IRUGO);

复制代码

- e3 D5 {8 Z) A5 m
      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。
$ n' y4 e1 _- I, e6 k     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 _' w! ~( K& N

# T3 k) f9 K9 I