OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 d6 D5 |  {- M: {' z% S& M( `

1. [code]EDMA sample test application
   # ~1 [3 Z. u/ B9 _
2. /*
   7 _" X  Y4 a; @  J$ \& m" h
3. * edma_test.c
   * }& I" C- C0 K2 n8 T5 g% T
4. *
   ) G+ Z7 W1 r2 p& p3 Q! _: h
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   , _9 N. ?& r) T0 E
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   % A, S: L" t' a* z! ~/ B. H3 `
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    9 ~( `; `( M& A- z  W' R4 D
12. *
    ) J: j4 V4 V3 x! k( v
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 |8 J4 v5 u, k5 C  {
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    : j" P" d1 Q4 ]3 k
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    7 X7 |; |! x' g
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. */
    
24. 
    / E* ~% B% `5 j' y/ k
25. #include <linux/module.h>
    9 @& c% c: o( X7 t0 G# n
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>
    ; l8 \1 q9 f9 @8 @# {0 T: K# d
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    $ i! L3 k0 \; Z! D( O
33. #include <linux/mm.h>
    ! L# V) d. K5 y( ]! ^: m
34. #include <linux/dma-mapping.h>
    / _- l7 J; w- }; a6 h3 n! ?
35. 
    
36. #include <mach/memory.h>
    ; B' H3 X* M% p) }
37. #include <mach/hardware.h>
      o- W. K/ ^3 V4 j
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    5 \) y0 ^2 h) w6 F/ k
42. /*#define EDMA3_DEBUG*/
    
43. 
    4 W6 U0 H8 J) Z
44. #ifdef EDMA3_DEBUG
    5 ]% L! C( I: L5 W
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! ~5 a0 }9 Y6 u  D6 K/ S& Y" [
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    # o5 j. T3 J! \+ ^6 R4 \
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ' O2 n1 u+ s6 G  R
49. #define DMA_PRINTK( x... )
    , v& _# \" z+ e- e
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
    ! E( Y. ^# D) p
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    4 z/ I9 w; I2 \( R+ `
59. #define ITCCHEN_SHIFT               23
    8 s' x# ^* ?# y9 b7 z- m: T* N
60. 
    
61. static volatile int irqraised1 = 0;
    $ N% `4 f) I$ V8 J3 a$ P& L) W' w; q
62. static volatile int irqraised2 = 0;
    7 W* W/ y3 c6 `7 Z/ Q5 m
63. 
    # F+ j# b" s$ X6 F
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);
    + A5 P7 M3 e; m! d# W6 R
67. 
    2 o. @6 q/ [9 a
68. dma_addr_t dmaphyssrc1 = 0;
    $ e8 e: y1 B, H( C" F. W- |6 k
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    + s$ A" K& a# z  z
72. 
    : m9 ?* z. c( w) }1 N6 U5 B
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    % t0 U, z0 d8 d
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    0 u; b0 T6 |+ A! C1 U- e3 L, A, a
82. module_param(acnt, int, S_IRUGO);
    7 ~; T$ Q$ c( H4 {
83. module_param(bcnt, int, S_IRUGO);
    ' b$ s) o1 {/ l$ v0 h- c) b
84. module_param(ccnt, int, S_IRUGO);

复制代码

: L1 u0 q7 J$ B9 T      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
) M3 `1 y' k1 E6 yarm-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。
9 s) j. n% ?9 {9 p6 z     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
0 r* ?& w7 b; m$ X; w( R

7 U4 X+ M4 Y% ?- J5 S0 M