OMAPL138如何在Linux下使用EDMA3驱动

yyj

! |( k7 H! E- E9 O/ A& ?

1. [code]EDMA sample test application
   ; c$ F/ A! O* ]# Z
2. /*
   ) G& c, v; A, B+ S
3. * edma_test.c
   , ^4 t; U; y$ a1 N# F8 g. v% i$ f
4. *
   & D! W- T7 v* r" j. a
5. * brief  EDMA3 Test Application
   1 b2 w( v1 B  Z# R
6. *
   + U; Z& r/ [" Y4 y$ }
7. *   This file contains EDMA3 Test code.
   , U  f$ U6 X+ i& F. ^  U
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
    ( T2 d8 W& f6 g7 s
11. *         TO CHANGE.
    . A6 T+ U8 e! Y
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    % y; |$ a: O. ]* w! d: v# _) i
15. * This program is free software; you can redistribute it and/or
    7 s" ?2 c! t) q& g) i  E
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ( H) u0 H, }4 `' u8 n) I* C
18. *
    % u4 j2 ~; A7 Z# k6 s
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    # n# I" k: P5 b# `
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & `  r2 B7 V  S4 P' Q8 e& x
22. * GNU General Public License for more details.
    
23. */
    
24. 
    0 B3 @$ j$ I) o0 b- |
25. #include <linux/module.h>
    ! o  Q9 ]9 c. |7 @( z
26. #include <linux/init.h>
    5 y) ]/ [8 j1 {0 e: }' b8 p) M
27. #include <linux/errno.h>
    % M3 M: e% R* b  H5 b
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    # }' Y$ m$ E" j* z! A
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    6 b9 d9 ]) D. f8 l
32. #include <linux/sysctl.h>
    ; a  J3 C1 U$ J: P
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    4 U+ I0 @7 u5 S5 r- m
35. 
    
36. #include <mach/memory.h>
    ' D/ r) D& ]+ n. P
37. #include <mach/hardware.h>
    # M( Z8 R0 P" E$ g* ?
38. #include <mach/irqs.h>
    ) f% w! t( k1 l  z/ p: G' N
39. #include <asm/hardware/edma.h>
    0 i3 n9 t8 y( @3 z* g$ g/ q; z8 n
40. 
    
41. #undef EDMA3_DEBUG
    ' ]% k/ ]& j! O
42. /*#define EDMA3_DEBUG*/
    ) N. a+ o5 U# u. V
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    * c. F6 e* U* `9 Q6 w) v
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... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    . J: q1 G% r7 f: T
52. #endif
    
53. 
    ) R% C" \) i6 B3 E" ~- a3 K1 s
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    4 x) Q5 |, A: r+ u# E- E& H7 d7 h9 T
56. #define TCINTEN_SHIFT               20
    ) E; z) Y* E) n+ Q. N. \
57. #define ITCINTEN_SHIFT              21
    7 Z" O  C7 G/ K  {- q4 r- o8 w  W
58. #define TCCHEN_SHIFT                22
    + K* e- |" n( y) |. \1 G* O1 [
59. #define ITCCHEN_SHIFT               23
    
60. 
    
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);
    
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);
    , H; f+ N# a, T
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    8 w* v4 P3 j. _
69. dma_addr_t dmaphyssrc2 = 0;
    / T+ b" g* V1 X9 V! W
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    2 l8 s# }# c" C
72. 
    ( r/ H: \1 h+ W# ]5 \
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    - K1 b, B$ q8 B/ o( O
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    , |$ G. n  L6 ~) m0 M
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    . F2 o  a% K2 t
82. module_param(acnt, int, S_IRUGO);
    0 z9 E0 Q# R/ r
83. module_param(bcnt, int, S_IRUGO);
    / ^4 P1 Y) N0 t, Y7 ?7 L
84. module_param(ccnt, int, S_IRUGO);

复制代码

( ?6 d0 y3 z! ]: h! @+ x. m
3 T; K  _9 \# v4 H4 O+ O      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。
  c5 E# @  Q8 R$ t. c6 @" g     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
  w/ o' ^$ [) \0 W' M) H
! Y9 o7 d/ t, L; G) L3 H
. T) h2 W( w2 u/ u+ n: K