OMAPL138如何在Linux下使用EDMA3驱动

yyj

  G* Z& {# Y  d  s/ B

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   . V( X8 B3 r" q; q. p3 C
5. * brief  EDMA3 Test Application
   ; M' N* U( @! a. j9 S5 \: J5 A
6. *
   
7. *   This file contains EDMA3 Test code.
   ( c6 n5 Z4 F) c" H4 x$ e
8. *
   * o# X5 u7 ?( h7 A. Y" }+ h
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
    1 X; x) J* [9 n1 h, j( |4 v
11. *         TO CHANGE.
    ; B# p+ p8 E7 q- z; Z5 e
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    8 A5 Z/ K6 U6 H* I
16. * modify it under the terms of the GNU General Public License as
    % `! g# E; Q6 n1 L0 `
17. * published by the Free Software Foundation version 2.
      f' l4 Z$ T6 @( Z4 @) ~
18. *
    " s! {/ X: |# V( `! B( N0 B6 G
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    8 E  T$ g3 {8 r1 \$ d+ r" J
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - L- M& a( \7 s
22. * GNU General Public License for more details.
    - ]# I; G( k* @' D2 \  y
23. */
    
24. 
    + }4 {3 |* @6 t+ x7 {
25. #include <linux/module.h>
    * ~" H* m; X8 ~4 d+ [  l
26. #include <linux/init.h>
    $ m% n4 P6 X9 k) w# d* k
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    6 l) H8 J/ Q" g; K) V) x* r, i9 ?
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ! J& L. H. ~2 O% S
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ; k! `" L3 c  k  f
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    6 X% V' A. _5 T$ g8 |' B7 W
37. #include <mach/hardware.h>
    7 }& Y- A3 b1 k. r% D7 e; }
38. #include <mach/irqs.h>
    . K/ T  J8 I+ m+ E4 D
39. #include <asm/hardware/edma.h>
    9 v, \  c' m( j+ q% J
40. 
    . A1 l  K( R& t( j
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    * v8 o+ J+ O# ?; R" p* \
43. 
    
44. #ifdef EDMA3_DEBUG
    5 r" b% S& e) a& A
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % k5 b2 Z2 T( |) c" r4 K- K
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    1 _: }& k/ i: ]( R6 V7 w: z
48. #else
    8 E0 ]9 F9 W5 I4 [/ H8 r5 W
49. #define DMA_PRINTK( x... )
    * N% G, s' {  M  B
50. #define DMA_FN_IN
    - }& L" _1 ]9 y* l+ [8 A; C  O4 C
51. #define DMA_FN_OUT
    1 |$ p7 }/ t, R
52. #endif
    
53. 
    + h" ?; E7 k0 b/ g1 D
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    # J( M8 e2 c0 l4 Y
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    6 `, R- u9 l7 O1 j" u  v" @
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    $ p5 c' E: v) b- k/ L5 r  }! @
62. static volatile int irqraised2 = 0;
    & L1 x+ [2 @( `2 P9 P+ X$ ~4 R
63. 
    2 H: T/ o; e/ g; o
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! r! ]& W" Q) v) o! }
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 @+ [" H) l' Z9 B4 s
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    " g- L2 E# [8 I/ Q9 i
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ' k( Z* N& S; B& l, f
70. dma_addr_t dmaphysdest1 = 0;
    ( M5 }9 y2 U2 X& G$ F
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    + z/ @0 p8 a- `" k- ~5 |% C( t/ R
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    % U( A- S, b/ W4 q: ~
77. 
    
78. static int acnt = 512;
    , i0 |7 w) f+ z  _% v$ X
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    4 G3 Y; ~8 [/ b% |& X, M
81. 
    ; c4 A3 A2 v) _: V6 B2 t
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 J. i$ l# g* A3 L( T
8 {! c  ?. g8 t6 ^4 C" C5 Z      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
' r6 X+ x: k" _8 T9 W1 q7 {5 Farm-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。
' V6 B4 I* z1 N     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
4 s) n+ ^6 n# p4 y/ K8 r
- F1 e/ I! {2 U- v' P) T