OMAPL138如何在Linux下使用EDMA3驱动

yyj

- q7 ?& J& b& K2 a$ l' T& i

1. [code]EDMA sample test application
   / m" c) u8 X( [0 ?* w
2. /*
   & h3 C1 {2 x- q  p
3. * edma_test.c
   
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
   6 v# q! e3 ^5 k
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    4 A. o0 K; b5 A" l5 v; m5 T
11. *         TO CHANGE.
      q: w7 I5 R7 S# B$ v2 ^7 A3 r  B
12. *
    . l' f5 G! e, [% W  n$ f+ c% j! E) H
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ! e$ F; |5 ]6 U) z( z8 B4 R8 w$ Q
14. *
    0 O5 L9 W! n1 d: l- ?# D$ W
15. * This program is free software; you can redistribute it and/or
    , W' A- E" L  e' D
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    - s5 B  `. ^! w$ ^6 I- |2 l; _
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.
    0 ]  @$ E9 w5 V) X
23. */
    
24. 
    
25. #include <linux/module.h>
    / v' \# p) l* Y2 ]
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    . [& ^! M3 ?$ ]3 j5 l
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    " ?6 B2 x8 V, s: ]( m
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    2 `7 a* @, v' N( m
34. #include <linux/dma-mapping.h>
    7 r. d2 i$ r  u: W. h5 \7 K
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    % l/ e- s5 m( {7 A' A0 g' s9 c
38. #include <mach/irqs.h>
    " F; u  x& a4 |- |
39. #include <asm/hardware/edma.h>
    6 g7 Y8 p1 p, K$ f
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    6 s* P- t' j5 w
43. 
    
44. #ifdef EDMA3_DEBUG
    
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
    6 ~& }% i2 J3 Y. Y
51. #define DMA_FN_OUT
    1 C. S" I, {4 i) P: K! I6 y
52. #endif
    
53. 
    0 J& T/ ]# Y- [7 O( Z" {' _
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    4 J8 D) {3 u# s% N4 J, V% M, n
56. #define TCINTEN_SHIFT               20
    8 ~8 [; s1 V% t/ C3 N
57. #define ITCINTEN_SHIFT              21
    7 O: t! F4 A% I7 X7 U
58. #define TCCHEN_SHIFT                22
    5 a% r  [- `/ r7 t, o
59. #define ITCCHEN_SHIFT               23
    
60. 
    . Z* S$ H$ }" N( e) T8 `( e+ @! K9 a5 {
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);
    5 {" q: q& S/ D/ o) r" p+ k' K
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);
    4 ?7 ?" j! b- A% c
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    8 K2 Z; e4 V" C. m. {
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    9 p& ~$ A5 E; H
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ) M! X: {) \$ t7 a
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
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

* L0 l$ D( v* n) k) p      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
4 ?* y" T# q- Carm-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。
6 L8 D% ?$ }; ^4 ~, Z. Z

4 b1 b, ]- x6 `  J% Q) _, C