OMAPL138如何在Linux下使用EDMA3驱动

yyj

7 Y# V5 K6 X1 i# k* Y$ _; u

1. [code]EDMA sample test application
   # i2 Q* _, d1 m* z/ G% C" [
2. /*
   
3. * edma_test.c
   
4. *
   1 |0 g. A& r: P
5. * brief  EDMA3 Test Application
   
6. *
   ! |; q% P& e& t  `$ `- e
7. *   This file contains EDMA3 Test code.
   3 w, X' F; Y' w) j
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
    / V* S+ H/ T: ~6 R; n1 V
11. *         TO CHANGE.
    : d2 A6 t+ @1 k9 H1 N
12. *
    3 h- L* X% c' C, T4 E+ B
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    * v4 J" y# R& j+ v5 j
15. * This program is free software; you can redistribute it and/or
    & n) h# f/ K& A- M
16. * modify it under the terms of the GNU General Public License as
    1 Z' a0 r5 j% A1 {  y
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
    3 g+ e8 F8 o/ b/ H; D. f
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 |2 ?2 C1 x% ]+ a
22. * GNU General Public License for more details.
    . W: B" Q0 K9 d: l
23. */
    
24. 
    
25. #include <linux/module.h>
    6 R9 U5 q' f/ }2 i. g
26. #include <linux/init.h>
    2 A; N' a( z5 L- F
27. #include <linux/errno.h>
    . ^+ F' Y; G2 J4 L& H
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    / l* x5 `  A. j- J1 I9 P5 E
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
      q" Y& @; o& `6 f
34. #include <linux/dma-mapping.h>
    + w7 I) o+ H, q& t
35. 
    5 |! _& O% g. q7 a2 n! i
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ( \. L1 ?$ [( p, w$ D
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    * U, Y9 v- E& W  Y: m4 i
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 M) ^% ~- _3 D% l$ i6 v. L
43. 
    : K8 a4 z6 o4 ?" ?) O
44. #ifdef EDMA3_DEBUG
    . ?* l! {, e$ J
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / ^0 G9 `1 `% Q
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ' K) q/ F5 Z0 G- U8 @. U0 S7 C
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    * w2 G" @) E1 D/ b2 }/ i
50. #define DMA_FN_IN
    + T) G$ i" d! a6 ], r" l( i
51. #define DMA_FN_OUT
    3 b( A& L) ^7 P8 {; \
52. #endif
    4 m5 o, b4 p! q* n' ~1 o  n
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    8 ^6 _, Z8 m* o$ T7 J' R
57. #define ITCINTEN_SHIFT              21
      P( T5 y. r' P
58. #define TCCHEN_SHIFT                22
    ! Z2 G7 ?0 M. X( t: I
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    " g% f0 I/ L' @' k$ v1 M+ `
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);
    " ^3 F6 f& ^+ `1 P
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! {' R. y' L; v" g0 h
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;
    
72. 
      ]( A3 q  g! ~
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    4 Q; L- U1 Z) t- w/ P- J7 r
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    7 f6 ?. T1 {0 L& p
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    + q2 e; j, {2 O6 ^) p* T
81. 
    
82. module_param(acnt, int, S_IRUGO);
    " ^2 i6 h" T! j# m3 ~6 z5 C
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

- ^2 {: ~+ V  z: w& _9 w& [      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。
; h' D  [9 @8 z6 `3 C' J     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


1 T' v5 u2 E0 G" h" H" t' ^