OMAPL138如何在Linux下使用EDMA3驱动

yyj

, M& P/ E" h' d) t8 b

1. [code]EDMA sample test application
   6 R! B2 x0 f9 `& ?1 {* ]: J9 q$ q
2. /*
   , t' \- ?( [$ v. c
3. * edma_test.c
   * S8 D2 ~% a8 H/ e
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   $ S' Y7 z% ~9 R& H. L  L4 W
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   3 Z+ Q5 S9 G0 ?" s7 G. @# X) V
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    8 h' A0 f: \3 Q* F
12. *
    4 Y+ U- i7 h7 _# F  L7 F
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; x+ s, n' h$ A/ k" J( X1 C! H+ l, E* P
14. *
    
15. * This program is free software; you can redistribute it and/or
    / P. R* o/ u3 q7 q8 N2 @' e
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    9 B  p# Y9 V" H) R
18. *
    : l/ `4 }5 |7 Q! q9 l
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    % Q: E* g' `  P8 G9 Z  W: e4 n
20. * kind, whether express or implied; without even the implied warranty
    & ^( ~' w) l% E4 h; G6 |' x
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    : L4 [3 j. h7 {2 N( f1 C
22. * GNU General Public License for more details.
    & v! Z! K6 G( M( a2 C
23. */
    ' b0 U2 g: T7 j
24. 
    1 ^1 P6 Q" N8 {- _+ ~: S! W
25. #include <linux/module.h>
    5 T- K+ c3 i1 k
26. #include <linux/init.h>
    8 Z4 j! }: v  v4 p& \7 Y+ r$ {
27. #include <linux/errno.h>
    5 m6 d% _* }) l' o, P% Q2 ?
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    6 ]2 o% P7 ^2 r+ B2 f$ R; |( j( n' ?! u
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    9 ]/ n" j" v, j7 v# s
35. 
    
36. #include <mach/memory.h>
      S8 f2 D, \' N4 g6 _7 Z
37. #include <mach/hardware.h>
    + |2 _, b4 S1 o/ u4 L$ s
38. #include <mach/irqs.h>
    2 j4 d8 s5 F% v5 s
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    1 x2 \# v7 l% R" N+ R5 ?1 g+ p
44. #ifdef EDMA3_DEBUG
    3 D5 K( q  _* o
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... )
    ) N* H/ n7 g: {
50. #define DMA_FN_IN
    4 {' _6 M$ q5 h, r
51. #define DMA_FN_OUT
    2 o8 t/ j1 O) U! c
52. #endif
    & A$ Y; j& s# {, b
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ' x) P4 ?& z" g' u) Z
57. #define ITCINTEN_SHIFT              21
    ' K$ t* X1 q1 o6 u7 |% U
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    + p$ d3 _, X  y2 k
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    8 z" N+ v( P5 N% X
69. dma_addr_t dmaphyssrc2 = 0;
    : r6 `7 G7 |+ i7 e
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ; n; z: ?+ a! o
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ) G2 g# @( s$ Q
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    # h3 B4 S; E! N
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    , w( q4 W- }& ?- _! E% I
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

& q9 n2 K; d3 e
: b) K$ ?& ]& f, 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
9 W# Z1 w4 A, j' a9 Tarm-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。
- K, |6 C& y! @1 [     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
" d6 h, i% b7 J