OMAPL138如何在Linux下使用EDMA3驱动

yyj

: l! w0 w$ ~& a$ n; x2 V

1. [code]EDMA sample test application
   ! c6 U& I% [7 ^" P1 E7 Y* k
2. /*
   
3. * edma_test.c
   4 Z  S! I" Q8 w2 w2 p- b$ E
4. *
   
5. * brief  EDMA3 Test Application
   ! _& H( R) {8 I  e3 [
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   1 ?; e9 t' w2 z- M$ `& k, O
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    5 w. u6 T; V+ c; D9 ^% Q
11. *         TO CHANGE.
    4 b' M3 g6 E8 M, p% O0 X" Y
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
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    , Z+ Z( i" L' v8 y5 X4 z
18. *
    ) x0 I$ T9 _# ^! X+ U# i
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    # x. S" O  V) t8 H1 P! c
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; F; T5 e4 f$ F" A
22. * GNU General Public License for more details.
    4 h7 |. f5 @, K, t* q
23. */
    
24. 
    $ m% p; _+ x8 ^3 @
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    # [- m% L$ k" I: P( Q! x1 o, \
29. #include <linux/interrupt.h>
    4 a7 I+ ^' G$ T# o8 r% @- l
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    0 K" e  B$ b" l' q! v
32. #include <linux/sysctl.h>
    ) w# K$ E  w- y- p, R* d
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    9 A* J1 d( E8 ]8 v  B: s1 l7 ?
35. 
    . e6 ?  x2 E9 \( Z8 I4 F+ z
36. #include <mach/memory.h>
    ! u: u! `7 \) P& L) T! x/ Z
37. #include <mach/hardware.h>
    ! \4 Z3 T7 |. X" O, K& `8 n! W
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    - m8 i( I/ ]* ^
40. 
    
41. #undef EDMA3_DEBUG
    - \# @- J$ d0 N2 ^0 Z+ m1 _, y
42. /*#define EDMA3_DEBUG*/
    8 B2 i* [' j- @) I4 n6 h. Z3 x
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    8 j2 m, Z# y& q# K0 `
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    1 W: E! p1 S; p' t
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    % u, [! h" @; _8 ~0 T- M3 H
48. #else
    5 |$ ^# Z, B/ i6 w
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    4 o* K* h0 e: B, L
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ( r7 w5 F6 u/ M2 ~9 h6 x; v, p7 T) f
58. #define TCCHEN_SHIFT                22
    ( I3 Y  F8 P& t, p% q, A
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    0 G. }; z) Y1 {: T4 M
63. 
    6 a3 R+ Y  d, g) M3 U
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % K. j8 p3 X; f% Z! M0 Y
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);
    
67. 
    1 c2 Y! j! u3 Y. F# u+ F* V
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    & X+ s" M+ r- ~, W
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    0 Q) ~; M( J% k; ]
72. 
    6 w9 \. e4 W' R4 L, N
73. char *dmabufsrc1 = NULL;
    4 s! z: k: X: j  E; s6 x, u
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    7 L# X( E* W% s! d0 @
76. char *dmabufdest2 = NULL;
    % L* u$ k( Y' o3 O. C& R
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    7 [6 J) O* O/ [* `$ o
80. static int ccnt = 8;
    
81. 
    , E. v- z2 B2 d# n  l, j  q
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

6 S3 Y6 X) j. _; Q. b
      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
  J6 S5 K" O4 F6 H% h! D$ rarm-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。

8 q7 w/ Y: Z* G4 |9 x$ z( b1 O1 d( `
/ d+ r1 Y8 T# A