OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   4 F! c6 h! x2 D) n0 l* c! ?$ V
2. /*
   
3. * edma_test.c
   8 u0 R: H+ j, b  u* B- M$ V6 v
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   9 m) t- Q- H: d" L% P4 L; e) L
7. *   This file contains EDMA3 Test code.
   0 S5 Q) n' }( z: P  E
8. *
   # }+ p  b7 h/ y1 h& q* {5 M% y4 o
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
    2 t* [2 O& u' S6 ?
11. *         TO CHANGE.
    
12. *
    8 d5 z4 h5 V2 k. a* J4 @+ B
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; B7 a* h. ^8 M( o& w
14. *
    
15. * This program is free software; you can redistribute it and/or
    9 U7 L% k# w7 D' X: \6 G- x8 s
16. * modify it under the terms of the GNU General Public License as
    $ @3 C. {& U$ [+ V# }% |& i
17. * published by the Free Software Foundation version 2.
    + X% g. `8 o3 U6 U
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & u( _5 a8 z7 n# u$ R  Z+ _/ l
20. * kind, whether express or implied; without even the implied warranty
    ! E3 q" O3 p" N
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ' |* q  n; b/ P+ e- U% V; D- s
22. * GNU General Public License for more details.
    ; `7 P! @  y* @8 r( c! [
23. */
    3 v( B6 S4 ]$ [. g
24. 
    
25. #include <linux/module.h>
    8 Z, L: x! ]* @
26. #include <linux/init.h>
    # R3 q% k4 u9 k$ v* ], g2 J
27. #include <linux/errno.h>
    , [. h! j2 V* \" u7 ?/ I- Z
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    5 q/ ~! z; v6 Z6 U% N
30. #include <asm/io.h>
    : A* w0 k: J$ a5 u" m/ M
31. #include <linux/moduleparam.h>
    . @0 M) m! c3 H. ]
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    / S0 @7 u/ K- k7 d! [% x3 ?
34. #include <linux/dma-mapping.h>
    ; m6 P" R* g  L8 c- C4 S
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    4 j6 a4 r! B2 s  b& |! H* n
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    8 K3 ]5 O) I" B3 z- q* h
42. /*#define EDMA3_DEBUG*/
    
43. 
    7 \# \9 h: p8 k, M& l8 a! B
44. #ifdef EDMA3_DEBUG
    1 C; A2 P0 [5 P; J- g7 C2 `2 @
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    * v& S. R$ ?: s- r8 _/ t
48. #else
    # {0 S1 |# a( g  U
49. #define DMA_PRINTK( x... )
    ' [' l7 t8 s3 {
50. #define DMA_FN_IN
    * k5 G  n) v. Z) |* q
51. #define DMA_FN_OUT
    . i$ }7 _3 T2 P4 }" l' Q/ q3 S
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    - E' x* H$ J8 \0 p9 r) n/ u
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    . t1 J9 ]* d9 i8 r+ U1 Z0 k
59. #define ITCCHEN_SHIFT               23
    8 x, g+ t3 b! {
60. 
    ) M: {6 F9 ~( E2 C% L) Q  r& m
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / [9 R7 Y8 J8 H( t( D
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 m, ^! E' h3 b4 J1 J0 K$ S) \
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - {: Q- M/ y' O7 o4 i
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;
    # W; k  O2 Z: o3 T- ~( O3 L
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ( V2 i7 Z" V& r2 ]* B
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    0 p" ?' P7 Y) |& I
74. char *dmabufsrc2 = NULL;
    ( \: l( Z# n# B3 ^3 ~
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    + D& G+ g- _2 {; w) G! t6 J5 Z7 [
78. static int acnt = 512;
    
79. static int bcnt = 8;
    * v) i, z9 N) {% ]7 \6 V
80. static int ccnt = 8;
    1 B+ T  z# h) z. `4 W- T/ N
81. 
    
82. module_param(acnt, int, S_IRUGO);
    7 n0 C) `- W1 K
83. module_param(bcnt, int, S_IRUGO);
    - v0 U; T# u+ M' L0 [
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 u, s5 }( E5 u8 e6 d! A& d( x7 I      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
( `" A9 t8 g( q- iarm-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。

* ~! T4 v, _, Q! x. z9 x