OMAPL138如何在Linux下使用EDMA3驱动

yyj

% C* m" O% H4 D# V9 P5 _

1. [code]EDMA sample test application
   , ~$ `: |9 }( E+ i0 f! a1 f
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   " m' e* k4 i3 s6 s+ W
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   # t* X% X/ p. t8 H, g4 \* F
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    + L# T! t( ^. w; Y/ F% Z  |# s
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    / [+ P# e* V" N( |) {! l
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    6 _9 k( e" B- q3 z7 E% Y
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    5 C( H* r0 T1 r$ k$ n3 d
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.
    
23. */
    / x, Q' U) Z, t9 K, W5 v' Z( ^/ @6 t
24. 
    3 T" |- x  s* j+ a4 T, C
25. #include <linux/module.h>
    / a. [; N7 {) t0 I( P" I; X
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    $ m+ i2 P3 h! }4 N( ?4 i
31. #include <linux/moduleparam.h>
    % L4 J1 k0 q9 Y; ]% U
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ; E/ P2 b* w* f! @" B1 Z
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    # M8 X& r: k9 U5 q$ V9 `
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    6 q- e, @. X- E" A! y: [
40. 
    & ^) o; Z2 [9 b2 ~2 ^3 O6 J% Q
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    , L3 Y" F; r7 T/ W, l% L. i
44. #ifdef EDMA3_DEBUG
    / Q' Y3 |6 b; A8 u% f
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    % w& i  U$ X: [2 M8 X3 H
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    0 O0 ~$ i% l  f* _, E( ^$ S; c( `9 e
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 Z/ ?% H4 d: z5 `9 c( b
48. #else
    * `9 U3 Y! R. a! d5 Z
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
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    . p2 j/ A( v4 w; j1 X/ 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);
    6 c5 p" E; J0 _; o* @! }  d/ s6 b; ?
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; E5 j' k. j. G6 q5 e
67. 
    5 h& }7 l8 Y- ~- q/ M
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ) g# ?  J: j: c1 {% z
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    . x* d, k1 e! O1 ?, o
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    3 ~  r5 |3 A4 I  ?9 x
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ' S5 e0 ^3 J6 h% N' G2 t% m
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    0 g9 E0 P$ N8 B
81. 
    
82. module_param(acnt, int, S_IRUGO);
    4 k# g4 n7 v- ~! _( M( Y# @
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

* |& v8 L8 i+ P9 v( k2 \7 c; c
      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( O: j* x( E# Karm-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。
- W; \" U8 Q; I8 R$ g3 }     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。