OMAPL138如何在Linux下使用EDMA3驱动

yyj

! W* c, n/ s( G0 X' P4 Q1 Z

1. [code]EDMA sample test application
   % m  t2 b1 w1 a2 |* v
2. /*
   
3. * edma_test.c
   7 M1 O. F3 D; `' u' o
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   2 }0 Z- S/ X; m1 r1 h  j# @
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   # y1 N1 D8 [( y# i  l
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    * A9 V& c  g7 c+ f( F8 r7 B
11. *         TO CHANGE.
    
12. *
    3 h, L/ v7 q2 j0 T
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    0 l+ w5 a* }. A6 X% R: \
16. * modify it under the terms of the GNU General Public License as
    + Z6 J" M* q4 C) e$ T
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    . m, ?( a* q! a5 S
20. * kind, whether express or implied; without even the implied warranty
    5 c0 @8 w% S; `: D% s9 y
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    8 G& s. y- }2 c: c; T. {) F
23. */
      X7 d5 W; l2 |' r" S' `) q4 z- J
24. 
    
25. #include <linux/module.h>
    8 x  I8 x* E& ?9 n
26. #include <linux/init.h>
    1 M6 y2 m: a& `/ j; R
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    & Y, y, y% A+ P$ ]5 \: P- @
30. #include <asm/io.h>
      ~4 ]; s8 |& u( n
31. #include <linux/moduleparam.h>
    : f1 C) V; D! |, j. ~* m
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    4 z; M$ `3 g  O1 m% G
34. #include <linux/dma-mapping.h>
      X% C: R: t1 t1 P
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    - X( Y/ Y9 i+ F& A
38. #include <mach/irqs.h>
    3 A! z( z! P6 x* z
39. #include <asm/hardware/edma.h>
    7 v0 N: D: s/ B2 y, x. u: v
40. 
    0 z4 m- A* F% L# h+ R! v
41. #undef EDMA3_DEBUG
    2 b( m4 z3 d( I' T1 m' f
42. /*#define EDMA3_DEBUG*/
    $ l2 J0 H) K; Y* @% s
43. 
    , l5 p1 ?. ^- H) G" L0 @/ U$ T2 _
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / ]2 M3 ^1 i3 L# D9 O
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    5 F0 Z) Q' |+ E, z; R
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
      q5 H6 e6 {& d) R3 m" r6 E
49. #define DMA_PRINTK( x... )
    7 `3 k- w8 l) R
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    & u2 s$ I. Z0 X- u# C* ^
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    , I# b7 f5 m6 _/ [# I  O9 U5 l
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. 
      \7 W/ L7 U& t/ L' t8 B+ E
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    9 h+ C* ^+ w" C" ?3 h
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - W0 y: Y: b3 P+ i5 @; _& E
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . u% M7 H; P4 n! F* a$ R2 w
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    + \* }4 i  o. X- v+ R. I& G- R
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - ^, G) X: Q4 s' ]8 m  [( x
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    2 G& ?  y" [0 b
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ( s2 i% ^- ?% z+ _2 \4 s
77. 
    4 j* P/ E( \& E0 K6 q
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : {/ m4 ^: C( K' Y9 W7 P/ b. \# g
80. static int ccnt = 8;
    
81. 
    4 O6 r4 g: D# Q7 g8 r1 M) v/ K
82. module_param(acnt, int, S_IRUGO);
    ! a; O0 Y) r& t1 ]/ ]. \
83. module_param(bcnt, int, S_IRUGO);
    2 A' g0 O  v, I
84. module_param(ccnt, int, S_IRUGO);

复制代码

6 P# A( A9 P1 ]3 k/ F7 Y/ b# D      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
( L! L* u' P: e7 A0 j) s