OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   , k! F) d/ U$ h! u7 S) \' L& M
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   3 n5 r" T# h, L0 q
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   0 \" x% `3 j4 ]) w$ p; J- C
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
      d. j' V& o+ Y* e7 s% ?
11. *         TO CHANGE.
    - n$ t0 d9 r- ~, \4 D/ k# y0 v
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    * z: ?4 p0 F% f
14. *
    
15. * This program is free software; you can redistribute it and/or
    0 x& n, I. `( A4 a
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    3 y' J0 r. x9 \* o% q. P
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. */
    ( G, t0 y+ Z: T2 b7 X- c
24. 
    ) H% f% }- L$ m1 e' x# R. H
25. #include <linux/module.h>
    $ f3 e! w4 a7 @3 Q3 n1 v
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    $ r. R. o6 {9 }& ?. X. ]
28. #include <linux/types.h>
    3 g/ i5 q6 F2 C% D" U7 ]$ k
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    " g" j0 j$ E' I8 o" f* H. ~1 e$ Y3 m
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    7 s& d0 C) I$ ~# ~" R
33. #include <linux/mm.h>
    2 ?5 u5 T' v7 ]3 w+ [
34. #include <linux/dma-mapping.h>
    1 G' e  y& S8 ?1 I/ m7 }4 p( w3 ?
35. 
    
36. #include <mach/memory.h>
    8 h0 N4 G1 H+ v1 W2 Q
37. #include <mach/hardware.h>
    8 g: {6 Z6 e+ H
38. #include <mach/irqs.h>
    : ]3 J  C( t" V
39. #include <asm/hardware/edma.h>
    
40. 
    0 U9 `7 `+ v# k9 f2 G  g+ y6 I& [! R6 n2 }
41. #undef EDMA3_DEBUG
    ( W& c( f; k' ^: \- r% F0 A
42. /*#define EDMA3_DEBUG*/
    0 k* v/ l( B) v# _' ]
43. 
    7 p8 a5 d2 h' K) e. O! `
44. #ifdef EDMA3_DEBUG
    7 T5 ?. H/ a: Q' o2 S6 d
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    6 V6 R8 i; z  d
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    . u9 K' r% ?8 w. G1 s% h6 K
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / R% n% r9 E: O% X
55. #define STATIC_SHIFT                3
    8 h# @& D, s2 G9 f4 O* A' L
56. #define TCINTEN_SHIFT               20
    3 M/ p4 p, V" C7 K' N% U5 S& \! Q
57. #define ITCINTEN_SHIFT              21
      e, l: |5 h2 ?0 t
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    % e) S+ n7 I9 q. E
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    6 j1 j' j/ L/ U9 r1 }
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    ; H$ ~) R* f, F$ ~
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    1 X7 b, ]7 t& l. m
71. dma_addr_t dmaphysdest2 = 0;
    / l" J/ R8 M) S# n9 ?/ {2 M
72. 
    1 `# h9 M" k6 i1 X3 Y! J
73. char *dmabufsrc1 = NULL;
    5 W8 q1 A0 }; G. _" a$ h* A
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    - A4 n( H( v; a- q: t2 z
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    * l& F. Z  w5 K! g# c: `1 r
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    2 T5 J5 ~2 h  S2 k
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

/ \$ ?' \1 t/ H: F- v" n* Z0 E9 X
' }  I) J/ M' b1 a      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
2 t* e0 }2 l; E& y/ D0 U0 b% barm-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。

! |* U3 h0 A! F" r7 j( Y) {