OMAPL138如何在Linux下使用EDMA3驱动

yyj

/ M: H% V" V7 \; p

1. [code]EDMA sample test application
   . v( j6 N; T* T: r$ r& ]: F
2. /*
   3 e( t! E2 Q5 L& M! f# T, O- T
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   8 R  T1 v8 a" u8 ?7 p
7. *   This file contains EDMA3 Test code.
   - e: W/ W8 k! X2 W
8. *
   
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.
    6 a4 _" k2 i$ |
12. *
    ! {) t  L- {  Z6 P- G6 L1 a
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    9 o: p5 C6 R2 h, x: \& n$ @: G
15. * This program is free software; you can redistribute it and/or
    & ?+ i. x9 W" P& R
16. * modify it under the terms of the GNU General Public License as
    + n- C7 G+ u; d7 V( q1 ]
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
    $ y  k. k. F& A- v) f, W0 G5 B& }6 b
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    & Z0 Q) [* K2 u
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    * a/ h) V3 ^! ]
27. #include <linux/errno.h>
    % o& X* c  p+ C+ f* E7 a
28. #include <linux/types.h>
    $ [, y) i; D- N$ U% ^3 J" Z
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ; Z: c% ^' r' \: s" E: F5 G
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    6 Q: N5 @! v* R0 K4 O* s. o" n
35. 
    
36. #include <mach/memory.h>
    + ^; q# S. d% t& a( o  ]
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    2 z/ ?- Z8 f1 A- r( W& k
42. /*#define EDMA3_DEBUG*/
    
43. 
    , g5 }1 O( s, Z3 B: u5 T$ z1 Y
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__)
    0 m& X, M8 N5 \9 A
48. #else
    ) E# u$ F) L! }& o7 w1 X
49. #define DMA_PRINTK( x... )
    . U8 C) e; _; q) G- u
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 D, ]5 G) }- O7 |5 t9 o4 V* d
52. #endif
      t- c; I* w8 Y8 M' a
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ' i, |! w0 U6 c% Z+ S  y
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ' L9 c7 i- e3 Z
57. #define ITCINTEN_SHIFT              21
    / Z/ L+ u' E# n  \
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    5 {9 v  J2 N. T" e! V- G
60. 
    4 V$ S5 H% y/ N2 ~
61. static volatile int irqraised1 = 0;
    8 N/ u% Q6 R3 D& F+ M  X
62. static volatile int irqraised2 = 0;
    1 W, ~7 v3 P6 L% i* l
63. 
    : l. t' n8 V- a; [
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 X6 j9 v6 J7 b. H- @( _- W: x
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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    1 `* \0 k' D: X, R/ P6 k) ]
72. 
    0 d' |6 Q1 B4 Z0 W) c8 Y
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    9 A5 q4 l* V6 C' y
79. static int bcnt = 8;
    2 |: u0 ?0 B/ p0 U7 U
80. static int ccnt = 8;
    % }6 ^) W1 m8 k  I% }( R' ^
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    0 J  T' e. t1 V/ D7 f3 z9 O
84. module_param(ccnt, int, S_IRUGO);

复制代码

: n( ]2 @& A$ Z; |6 K* U      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。
- i7 P. `( E7 y: I- ^     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/ h" g+ N* R5 J, \3 n8 @, m8 W3 w& R