OMAPL138如何在Linux下使用EDMA3驱动

yyj

* o3 B) s* T& L  P8 k

1. [code]EDMA sample test application
   & @6 S5 \" r+ s7 Y
2. /*
   
3. * edma_test.c
   + y: F9 g" y9 }$ ?- p4 O- ?
4. *
   3 D' B8 d  Q3 c$ s  ~0 E
5. * brief  EDMA3 Test Application
   ( f+ w$ |  x; E: f2 w
6. *
   ' ?; }: p/ r1 r. B" J
7. *   This file contains EDMA3 Test code.
   
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
    $ o$ E! d6 t! j9 {! m/ Q
11. *         TO CHANGE.
    
12. *
    , J/ x; M; P6 T& E/ \
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    ! V/ O# d% c* u/ b  N9 n
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    - {# `  o* I5 E2 Q
20. * kind, whether express or implied; without even the implied warranty
    $ ]( X" C+ {/ Y! v
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    6 a+ ~; I1 V/ `7 [& H
23. */
    
24. 
    $ C  K1 K, t9 b- G! I1 O
25. #include <linux/module.h>
    # t2 A6 J* M: c% E; {3 f8 \
26. #include <linux/init.h>
    0 _. ^3 Y- ?- y2 k1 {* Y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    - Q7 W: H, V" j7 U3 G1 ?2 i8 D
29. #include <linux/interrupt.h>
    + ~( B  G3 z' O. C! w. d
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ( {; t3 f' w8 z" B  _8 ~2 g, }
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    . ~+ A! y  N2 p8 k( J
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ! A- \- v8 ~, R% e/ g
43. 
    4 D0 y& ]/ U& a+ h
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__)
    ; Q4 w3 `8 U  m2 ]1 [
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ! p# X* o% _, i
51. #define DMA_FN_OUT
    
52. #endif
      g" ~9 f. [- q" p% F; \
53. 
    ' K$ A, g) P( K
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    * i! Z: X" A# [7 A, f
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    $ f& e( H# A0 g3 N$ y' u; T
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    6 y: o/ ?. I/ M: G: Q9 F9 |
60. 
    9 }  L  f; L$ {
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 t* c# R  p- w6 R3 K& p
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 {% q* ?# @9 b! K7 G- a
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / Q! e& y& ^6 S" x
67. 
    9 q, t* J7 r) d3 ^9 Y' E/ x6 B
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. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    0 J+ e) W) ~- E8 H; t" n4 c- e
75. char *dmabufdest1 = NULL;
    ; R  ~" ]1 e' S8 y) X/ q4 ?' K
76. char *dmabufdest2 = NULL;
    ; i. z3 L  J0 r+ O4 G. i
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    ; `% f- w9 |; a6 I+ e9 g; f
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    6 o1 g- T! I0 j( r; H
84. module_param(ccnt, int, S_IRUGO);

复制代码

3 j% ~3 @; U$ i5 T. V- P      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。
) Q/ R0 u, l( i! S     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
( U9 ~- G( k" R* I, K" K1 D5 F
+ ~" E- P2 c5 Q7 {3 n
+ I( }" p! X1 v