OMAPL138如何在Linux下使用EDMA3驱动

yyj

' O3 T  S" g. C: ~8 {5 @% b

1. [code]EDMA sample test application
   3 @" x( z/ i) m9 C4 ~; U. A
2. /*
   
3. * edma_test.c
   
4. *
   6 Q" I; _/ X: D6 T& V
5. * brief  EDMA3 Test Application
   " R3 W$ R& `6 b- e; Y% J+ f
6. *
   0 x% ~7 t9 m2 }( S: w" _: I( j
7. *   This file contains EDMA3 Test code.
   $ E& D6 X$ C& b# K1 L' V
8. *
   / O$ N. m) p( I! W) q
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * q: s; {& l8 a" D! V, M
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    2 S1 n( M5 O4 e  O2 U1 y
11. *         TO CHANGE.
    % G0 i# |) b1 d$ T5 \) a& ^0 h
12. *
    3 v9 {: T" [4 y0 \6 s! Y
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    : t+ i. }4 j* K; V1 u3 P( t  b# s6 A
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    3 _- h3 I2 e7 S" C2 R
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    3 o$ x; [0 A3 N8 d4 S- v' v& Q8 E
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.
      z8 A7 s+ P9 l
23. */
    5 U, v# E2 w! F- P) |4 `4 G* ^
24. 
    . F1 ]7 Q8 P& L
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    & J, A4 U0 Q5 v
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    6 n) p# V6 B8 s) L5 ~
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    & k1 @- J" k$ r1 }) N
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    & ]' Q6 G/ u1 D: H5 B% o) }" V
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    - G8 r6 m, Q: X( L' U. D' s, L
40. 
    6 T# z* {. [' w2 q, ]0 Z
41. #undef EDMA3_DEBUG
    ! e- H; ]6 M- ]2 V" x
42. /*#define EDMA3_DEBUG*/
    
43. 
    , f- E6 ?, n8 o7 v- M! U) |0 u
44. #ifdef EDMA3_DEBUG
    5 G  K/ H+ \% v/ o5 c
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( G8 L7 j0 ]. S; J6 z, L; G
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    2 Z) _- ~- y$ u9 [
49. #define DMA_PRINTK( x... )
    & A0 z  p, D4 Y1 X# V- a
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    2 y# V2 f$ P/ H7 Z' a2 h* {/ j
52. #endif
    1 I  t1 l2 X. K+ @
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " ~$ w9 @7 y' s2 h! t9 F
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    6 s+ e2 @( U- C& A5 ~
59. #define ITCCHEN_SHIFT               23
    / w: q5 b$ v5 ~2 b& g
60. 
    2 a3 t+ l% I+ F' r" e" e
61. static volatile int irqraised1 = 0;
    5 ?# r0 j% f* I" @/ t1 h& r, Q/ u
62. static volatile int irqraised2 = 0;
    
63. 
    % x, B" J9 m# o' z
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);
    7 B  `& b+ w2 L. E4 ~
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    0 c$ `$ U+ ~# r; W
70. dma_addr_t dmaphysdest1 = 0;
    ; s/ _; F4 s6 @+ C6 Z# X4 Q1 m5 R
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    6 s* g" L9 B: w
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    & C& }) N5 G0 i- s! P
76. char *dmabufdest2 = NULL;
    * v* q, x: |( M
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    5 G; ^1 {- H" z. Q9 P2 G* O. B
80. static int ccnt = 8;
    ! K3 ^5 v$ ]9 d  E" ~0 i
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ' N' m3 n5 z" C3 \/ n; \1 Y: ?
83. module_param(bcnt, int, S_IRUGO);
    , `* u4 b0 D: a+ S+ ~& T
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
+ l8 M+ Q  K. F- Varm-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。
% u; G9 P% Q& h     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


5 v* }; B) @5 j3 d7 p4 |