OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ' K9 k% K, M: i
2. /*
   $ c$ T9 R, D" H, x& A9 j  K% C
3. * edma_test.c
   
4. *
   + B% A" h$ `/ s! t! z3 n) B
5. * brief  EDMA3 Test Application
   2 ~9 S2 x' ~: a6 j* `# J; |
6. *
   / l( c0 _! B9 R" [" }' ]1 i
7. *   This file contains EDMA3 Test code.
   
8. *
   + P# x0 i' S/ X7 V; L
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
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    : B& ~9 z  M$ \9 C3 ^: `- D
14. *
    4 k. X+ k- `* N: I' x$ @1 H, q
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    5 }! ]  M2 h. D3 S( z) Z
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    * D# V# d* H, u; @1 N
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    & X) d9 Y7 J" w& \2 [2 S0 F' c+ J
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    / M6 L7 I* C' `6 r) q1 V
27. #include <linux/errno.h>
    4 x& N- z7 K$ E" h, ?1 n
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    . P$ A$ K* T% Q6 `5 F
34. #include <linux/dma-mapping.h>
    
35. 
    # o# i% c+ t& _* s
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    3 E4 f0 q$ E7 Y. @3 I. O: l8 `6 a- Z" R# m
41. #undef EDMA3_DEBUG
    ) y9 w9 t2 t8 k6 S7 d1 P1 C2 t& c, F
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    * v, B9 G$ o. o  X2 H" }
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    , m, y. P& p$ O) ?4 z$ D; \- i+ i
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    7 L( E/ O! x5 E. Y" I$ f7 A6 m6 n% ^
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    2 o$ Q8 D/ d$ b! [4 j0 [3 Q
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    / Z& K/ u1 A+ }3 Q; `1 B
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ' k9 E5 T& A' f1 L
61. static volatile int irqraised1 = 0;
    + p7 [6 |7 K$ f# C
62. static volatile int irqraised2 = 0;
    . V, e# }' b, @8 o8 x! w( l
63. 
    ' W% v) B- s/ ]/ ]6 I7 X
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);
    . T8 `% C9 I# K+ U
67. 
    - a! L7 E- y9 W0 b8 z- T+ h, R3 ?% s
68. dma_addr_t dmaphyssrc1 = 0;
    & Q6 v* r( @8 `& N5 a: D, F6 u
69. dma_addr_t dmaphyssrc2 = 0;
    + m+ f5 o5 h8 Q
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ; M" P/ M* p7 c& V
72. 
    / y* w' Z0 ]3 v( q, e8 O6 w7 c" q2 j8 q1 x
73. char *dmabufsrc1 = NULL;
    5 y. r2 U( ], C( `+ ^
74. char *dmabufsrc2 = NULL;
    . [( }2 c3 g) K7 f6 o2 s0 f! N
75. char *dmabufdest1 = NULL;
    # p+ i3 Z2 b9 T4 L* s5 D
76. char *dmabufdest2 = NULL;
    ) r4 x- j! H) g' @& l6 y
77. 
    . |& r8 s: Y7 P, y' A) ~/ B8 n/ f! p
78. static int acnt = 512;
    
79. static int bcnt = 8;
    1 ]) Z) q( ]3 u9 e/ |% ~* b
80. static int ccnt = 8;
    $ y8 ?" G) a; ?( R  O
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

5 v7 v- ^( K# W$ V) B% j
      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

" t6 D( M& t0 C; u
5 U* a+ q$ N- e& k2 R1 K