OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ F2 q! }( i3 ]; ~( U* t

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   : R0 d& @0 _! T" @9 `
5. * brief  EDMA3 Test Application
   5 B- k' \+ D2 y# n. j/ l  V
6. *
   
7. *   This file contains EDMA3 Test code.
   5 |) V; Q8 L" |0 z9 }1 q7 h' F* r& i$ W
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   9 u2 ]( C8 U; v
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    3 n$ A. \8 r5 c* o. e
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    - y. k1 }0 R# z0 X5 I
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
    9 _1 M% C9 F1 N4 y( O; o. G+ H
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 [- g+ h7 s; D* }
22. * GNU General Public License for more details.
    
23. */
    
24. 
    7 U+ x! l* s) X' J. s
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ' O, w) S% B/ h) K
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    4 M8 c0 E' T  @$ ^4 ?6 f3 `- u
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    9 }: w5 q/ b) L3 r  ^4 l3 |6 B
33. #include <linux/mm.h>
    7 _6 ~! T1 P+ W) b
34. #include <linux/dma-mapping.h>
    3 R/ P; w9 [, `! P- P
35. 
    
36. #include <mach/memory.h>
    / N1 n; t" C2 n$ P
37. #include <mach/hardware.h>
    
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
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / `2 ?& f) f! T5 W
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ; [! D0 Z5 C0 V, k
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    - {, [1 ]: ]' B6 d
48. #else
    0 c: D; c+ W1 m6 c; u0 ~
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    + z* L& y; u1 |* k1 r
51. #define DMA_FN_OUT
    ) d  {& `6 F+ _' j+ X
52. #endif
    $ [( |* b( m2 b5 L. Q9 V) A
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ' M. x# Y# S$ y/ C  a2 @
57. #define ITCINTEN_SHIFT              21
      S4 R& [& S& y+ P& H: t
58. #define TCCHEN_SHIFT                22
    $ B9 _& l& O$ A. N6 ^
59. #define ITCCHEN_SHIFT               23
    / T' K6 O' L- H  I1 b% k% z
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    * ?/ P, W' U1 A$ Y. \; ?
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( X6 L1 G( A  c/ E1 n: j) O
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 Z3 |. P/ H" n: V
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) s1 I7 @: Z4 O7 d
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ) k/ K5 |" x0 S3 q3 M3 {
69. dma_addr_t dmaphyssrc2 = 0;
    0 _6 q# |4 m- {. g' b8 b
70. dma_addr_t dmaphysdest1 = 0;
    0 e5 `0 Y+ S* h) x+ E) q3 N( o
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    4 y8 ?& g& r$ ^3 ~8 \& s$ a
74. char *dmabufsrc2 = NULL;
    , B  C! L' L$ s1 I- p$ Z
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    : z! h, Z9 g4 r
77. 
    
78. static int acnt = 512;
    , ^( z, _* |4 X# d( x  C
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    8 \" @1 u- r  R3 n0 C
83. module_param(bcnt, int, S_IRUGO);
    , `2 P2 c5 E: ~0 }
84. module_param(ccnt, int, S_IRUGO);

复制代码

3 u) n% y* l0 Z9 y/ Y7 |      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
& w" I$ g% t% q* g4 T, qarm-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。
3 N: O9 p; H( E  R0 K. C  B     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

. w" n; b6 r& \/ W4 x: h7 h1 P