OMAPL138如何在Linux下使用EDMA3驱动

yyj

0 [0 {% e7 D$ b$ X

1. [code]EDMA sample test application
   
2. /*
   2 Z* }' _: T8 z4 B: ~+ ^) s8 @
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   6 a$ I* k) ]& t* j
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
    6 I1 z$ Y& j( Y0 A6 p
11. *         TO CHANGE.
    0 \0 }8 U) i/ D+ H* T
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    " E9 o/ E# C/ v/ T( k
14. *
    : ]& z+ T% J# P) _' |
15. * This program is free software; you can redistribute it and/or
    / L: v: N# o1 P6 @
16. * modify it under the terms of the GNU General Public License as
    , x3 V' P, h  ^5 a
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
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    : j# s( E/ O, |3 `, }
23. */
    : i4 [  F3 e" m6 @
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ) u( a, m5 T% [
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ) j8 a: O6 y( M; [! ~$ a
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    # ]; A3 c; a! l8 D$ V3 X" \& A9 O( k
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    : h: a/ Q' L3 p: j2 X; g, p
35. 
    
36. #include <mach/memory.h>
    / s$ H! l) h2 ~8 k2 O, d
37. #include <mach/hardware.h>
    ( O  k: I* J3 L# Q, k" W! o% _8 S
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    # c' l7 b& c; r& H; ~
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
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ) h  K& x) ^. Z) J6 K# U
51. #define DMA_FN_OUT
      Q& k$ H1 {, x0 Z- R* c- b
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 ?, Z! b# R% u2 L8 F
55. #define STATIC_SHIFT                3
    + ]( A/ `1 E2 A) S0 |
56. #define TCINTEN_SHIFT               20
    / `" J+ a9 n2 o# z% e1 V% O
57. #define ITCINTEN_SHIFT              21
    , G9 J3 |5 y8 v
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    5 d0 w4 X: R9 S: M/ D' X( \
60. 
    + G$ n: o  `6 }; j( s; B7 [
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # u$ M, c# W) c; G0 Y- w4 P
67. 
    + ~" w$ b  @/ l' z. M. c
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    5 Z* h" b( E( V* v
70. dma_addr_t dmaphysdest1 = 0;
    5 q/ @0 R+ l) Q
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    6 r" o6 J$ O& N' R3 _) l5 V, `$ |3 F! k
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : T3 h' A9 L+ y5 w; ]& w
80. static int ccnt = 8;
    ( @8 i/ K6 [& r1 @6 d9 M
81. 
    
82. module_param(acnt, int, S_IRUGO);
    * I+ `0 c9 E- D4 B/ N3 w  J" T
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

) k! S3 f+ {5 }& s' k7 c7 Z0 g( t+ k
9 H5 z6 I' F1 t      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
% n& u+ ]4 d2 i# p' ?. d( Uarm-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。